/*- * Copyright (c) 1998 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: src/sys/dev/smbus/smb.c,v 1.20 1999/11/18 05:44:56 peter Exp $ * $DragonFly: src/sys/bus/smbus/smb.c,v 1.5 2003/08/07 21:16:47 dillon Exp $ * */ #include #include #include #include #include #include #include #include #include #include #include #include "smbconf.h" #include "smbus.h" #include #include "smbus_if.h" #define BUFSIZE 1024 struct smb_softc { int sc_addr; /* address on smbus */ int sc_count; /* >0 if device opened */ char *sc_cp; /* output buffer pointer */ char sc_buffer[BUFSIZE]; /* output buffer */ char sc_inbuf[BUFSIZE]; /* input buffer */ }; #define IIC_SOFTC(unit) \ ((struct smb_softc *)devclass_get_softc(smb_devclass, (unit))) #define IIC_DEVICE(unit) \ (devclass_get_device(smb_devclass, (unit))) static int smb_probe(device_t); static int smb_attach(device_t); static devclass_t smb_devclass; static device_method_t smb_methods[] = { /* device interface */ DEVMETHOD(device_probe, smb_probe), DEVMETHOD(device_attach, smb_attach), /* smbus interface */ DEVMETHOD(smbus_intr, smbus_generic_intr), { 0, 0 } }; static driver_t smb_driver = { "smb", smb_methods, sizeof(struct smb_softc), }; static d_open_t smbopen; static d_close_t smbclose; static d_write_t smbwrite; static d_read_t smbread; static d_ioctl_t smbioctl; #define CDEV_MAJOR 106 static struct cdevsw smb_cdevsw = { /* name */ "smb", /* maj */ CDEV_MAJOR, /* flags */ 0, /* port */ NULL, /* autoq */ 0, /* open */ smbopen, /* close */ smbclose, /* read */ smbread, /* write */ smbwrite, /* ioctl */ smbioctl, /* poll */ nopoll, /* mmap */ nommap, /* strategy */ nostrategy, /* dump */ nodump, /* psize */ nopsize }; /* * smbprobe() */ static int smb_probe(device_t dev) { struct smb_softc *sc = (struct smb_softc *)device_get_softc(dev); sc->sc_addr = smbus_get_addr(dev); /* XXX detect chip with start/stop conditions */ return (0); } /* * smbattach() */ static int smb_attach(device_t dev) { make_dev(&smb_cdevsw, device_get_unit(dev), /* XXX cleanup */ UID_ROOT, GID_WHEEL, 0600, "smb%d", device_get_unit(dev)); return (0); } static int smbopen (dev_t dev, int flags, int fmt, struct thread *td) { struct smb_softc *sc = IIC_SOFTC(minor(dev)); if (!sc) return (EINVAL); if (sc->sc_count) return (EBUSY); sc->sc_count++; return (0); } static int smbclose(dev_t dev, int flags, int fmt, struct thread *td) { struct smb_softc *sc = IIC_SOFTC(minor(dev)); if (!sc) return (EINVAL); if (!sc->sc_count) return (EINVAL); sc->sc_count--; return (0); } static int smbwrite(dev_t dev, struct uio * uio, int ioflag) { /* not supported */ return (EINVAL); } static int smbread(dev_t dev, struct uio * uio, int ioflag) { /* not supported */ return (EINVAL); } static int smbioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td) { device_t smbdev = IIC_DEVICE(minor(dev)); struct smb_softc *sc = IIC_SOFTC(minor(dev)); device_t parent = device_get_parent(smbdev); int error = 0; struct smbcmd *s = (struct smbcmd *)data; if (!sc || !s) 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->data.byte)); break; case SMB_WRITEW: error = smbus_error(smbus_writew(parent, s->slave, s->cmd, s->data.word)); break; case SMB_READB: if (s->data.byte_ptr) error = smbus_error(smbus_readb(parent, s->slave, s->cmd, s->data.byte_ptr)); break; case SMB_READW: if (s->data.word_ptr) error = smbus_error(smbus_readw(parent, s->slave, s->cmd, s->data.word_ptr)); break; case SMB_PCALL: if (s->data.process.rdata) error = smbus_error(smbus_pcall(parent, s->slave, s->cmd, s->data.process.sdata, s->data.process.rdata)); break; case SMB_BWRITE: if (s->count && s->data.byte_ptr) error = smbus_error(smbus_bwrite(parent, s->slave, s->cmd, s->count, s->data.byte_ptr)); break; case SMB_BREAD: if (s->count && s->data.byte_ptr) error = smbus_error(smbus_bread(parent, s->slave, s->cmd, s->count, s->data.byte_ptr)); break; default: error = ENODEV; } /* release the bus */ smbus_release_bus(parent, smbdev); return (error); } DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, 0, 0);