/*- * 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. * * $Id: smb.c,v 1.6 1999/01/14 22:55:03 nsouch Exp $ * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #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, DRIVER_TYPE_MISC, 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 = { smbopen, smbclose, smbread, smbwrite, /*106*/ smbioctl, nullstop, nullreset, nodevtotty, /*smb*/ seltrue, nommap, nostrat, "smb", NULL, -1 }; /* * 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) { return (0); } static int smbopen (dev_t dev, int flags, int fmt, struct proc *p) { 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 proc *p) { 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 proc *p) { 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_quick(parent, s->slave, SMB_QWRITE); break; case SMB_QUICK_READ: error=smbus_quick(parent, s->slave, SMB_QREAD); break; case SMB_SENDB: error=smbus_sendb(parent, s->slave, s->cmd); break; case SMB_RECVB: error=smbus_recvb(parent, s->slave, &s->cmd); break; case SMB_WRITEB: error=smbus_writeb(parent, s->slave, s->cmd, s->data.byte); break; case SMB_WRITEW: error=smbus_writew(parent, s->slave, s->cmd, s->data.word); break; case SMB_READB: if (s->data.byte_ptr) error=smbus_readb(parent, s->slave, s->cmd, s->data.byte_ptr); break; case SMB_READW: if (s->data.word_ptr) error=smbus_readw(parent, s->slave, s->cmd, s->data.word_ptr); break; case SMB_PCALL: if (s->data.process.rdata) 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_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_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); } static int smb_devsw_installed = 0; static void smb_drvinit(void *unused) { dev_t dev; if( ! smb_devsw_installed ) { dev = makedev(CDEV_MAJOR,0); cdevsw_add(&dev,&smb_cdevsw,NULL); smb_devsw_installed = 1; } } CDEV_DRIVER_MODULE(smb, smbus, smb_driver, smb_devclass, CDEV_MAJOR, smb_cdevsw, 0, 0); SYSINIT(smbdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,smb_drvinit,NULL)