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smb.c
(6.79 KB)
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smb.h
(2.42 KB)
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smbconf.c
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smbconf.h
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smbus.c
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smbus.h
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smbus_if.m
(2.55 KB)
Editing: smb.c
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 1998, 2001 Nicolas Souchu * 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 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. * * $FreeBSD$ */ #include <sys/param.h> #include <sys/kernel.h> #include <sys/systm.h> #include <sys/module.h> #include <sys/bus.h> #include <sys/conf.h> #include <sys/uio.h> #include <sys/fcntl.h> #include <dev/smbus/smbconf.h> #include <dev/smbus/smbus.h> #include <dev/smbus/smb.h> #include "smbus_if.h" #define SMB_OLD_READB _IOW('i', 7, struct smbcmd) #define SMB_OLD_READW _IOW('i', 8, struct smbcmd) #define SMB_OLD_PCALL _IOW('i', 9, struct smbcmd) struct smb_softc { device_t sc_dev; struct cdev *sc_devnode; }; static void smb_identify(driver_t *driver, device_t parent); static int smb_probe(device_t); static int smb_attach(device_t); static int smb_detach(device_t); static devclass_t smb_devclass; static device_method_t smb_methods[] = { /* device interface */ DEVMETHOD(device_identify, smb_identify), DEVMETHOD(device_probe, smb_probe), DEVMETHOD(device_attach, smb_attach), DEVMETHOD(device_detach, smb_detach), /* smbus interface */ DEVMETHOD(smbus_intr, smbus_generic_intr), { 0, 0 } }; static driver_t smb_driver = { "smb", smb_methods, sizeof(struct smb_softc), }; static d_ioctl_t smbioctl; static struct cdevsw smb_cdevsw = { .d_version = D_VERSION, .d_flags = D_TRACKCLOSE, .d_ioctl = smbioctl, .d_name = "smb", }; static void smb_identify(driver_t *driver, device_t parent) { if (device_find_child(parent, "smb", -1) == NULL) BUS_ADD_CHILD(parent, 0, "smb", -1); } static int smb_probe(device_t dev) { if (smbus_get_addr(dev) != -1) return (ENXIO); device_set_desc(dev, "SMBus generic I/O"); return (BUS_PROBE_NOWILDCARD); } static int smb_attach(device_t dev) { struct smb_softc *sc; struct make_dev_args mda; int error; sc = device_get_softc(dev); sc->sc_dev = dev; make_dev_args_init(&mda); mda.mda_devsw = &smb_cdevsw; mda.mda_unit = device_get_unit(dev); mda.mda_uid = UID_ROOT; mda.mda_gid = GID_WHEEL; mda.mda_mode = 0600; mda.mda_si_drv1 = sc; error = make_dev_s(&mda, &sc->sc_devnode, "smb%d", mda.mda_unit); return (error); } static int smb_detach(device_t dev) { struct smb_softc *sc; sc = device_get_softc(dev); destroy_dev(sc->sc_devnode); return (0); } static int smbioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td) { char buf[SMB_MAXBLOCKSIZE]; device_t parent; struct smbcmd *s = (struct smbcmd *)data; struct smb_softc *sc = dev->si_drv1; device_t smbdev = sc->sc_dev; int error; int unit; u_char bcount; /* * If a specific slave device is being used, override any passed-in * slave. */ unit = dev2unit(dev); if (unit & 0x0400) s->slave = unit & 0x03ff; parent = device_get_parent(smbdev); /* Make sure that LSB bit is cleared. */ if (s->slave & 0x1) return (EINVAL); /* Allocate the bus. */ if ((error = smbus_request_bus(parent, smbdev, (flags & O_NONBLOCK) ? SMB_DONTWAIT : (SMB_WAIT | SMB_INTR)))) return (error); switch (cmd) { case SMB_QUICK_WRITE: error = smbus_error(smbus_quick(parent, s->slave, SMB_QWRITE)); break; case SMB_QUICK_READ: error = smbus_error(smbus_quick(parent, s->slave, SMB_QREAD)); break; case SMB_SENDB: error = smbus_error(smbus_sendb(parent, s->slave, s->cmd)); break; case SMB_RECVB: error = smbus_error(smbus_recvb(parent, s->slave, &s->cmd)); break; case SMB_WRITEB: error = smbus_error(smbus_writeb(parent, s->slave, s->cmd, s->wdata.byte)); break; case SMB_WRITEW: error = smbus_error(smbus_writew(parent, s->slave, s->cmd, s->wdata.word)); break; case SMB_OLD_READB: case SMB_READB: /* NB: for SMB_OLD_READB the read data goes to rbuf only. */ error = smbus_error(smbus_readb(parent, s->slave, s->cmd, &s->rdata.byte)); if (error) break; if (s->rbuf && s->rcount >= 1) { error = copyout(&s->rdata.byte, s->rbuf, 1); s->rcount = 1; } break; case SMB_OLD_READW: case SMB_READW: /* NB: for SMB_OLD_READW the read data goes to rbuf only. */ error = smbus_error(smbus_readw(parent, s->slave, s->cmd, &s->rdata.word)); if (error) break; if (s->rbuf && s->rcount >= 2) { buf[0] = (u_char)s->rdata.word; buf[1] = (u_char)(s->rdata.word >> 8); error = copyout(buf, s->rbuf, 2); s->rcount = 2; } break; case SMB_OLD_PCALL: case SMB_PCALL: /* NB: for SMB_OLD_PCALL the read data goes to rbuf only. */ error = smbus_error(smbus_pcall(parent, s->slave, s->cmd, s->wdata.word, &s->rdata.word)); if (error) break; if (s->rbuf && s->rcount >= 2) { buf[0] = (u_char)s->rdata.word; buf[1] = (u_char)(s->rdata.word >> 8); error = copyout(buf, s->rbuf, 2); s->rcount = 2; } break; case SMB_BWRITE: if (s->wcount < 0) { error = EINVAL; break; } if (s->wcount > SMB_MAXBLOCKSIZE) s->wcount = SMB_MAXBLOCKSIZE; if (s->wcount) error = copyin(s->wbuf, buf, s->wcount); if (error) break; error = smbus_error(smbus_bwrite(parent, s->slave, s->cmd, s->wcount, buf)); break; case SMB_BREAD: if (s->rcount < 0) { error = EINVAL; break; } if (s->rcount > SMB_MAXBLOCKSIZE) s->rcount = SMB_MAXBLOCKSIZE; error = smbus_error(smbus_bread(parent, s->slave, s->cmd, &bcount, buf)); if (error) break; if (s->rcount > bcount) s->rcount = bcount; error = copyout(buf, s->rbuf, s->rcount); break; default: error = ENOTTY; } smbus_release_bus(parent, smbdev); return (error); } DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0); MODULE_DEPEND(smb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER); MODULE_VERSION(smb, 1);
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