Actually implement the internals of the 'ppi' device.
It is now possible to control the various parallel port signals from user-space programs without having to resort to opening /dev/io directly.
This commit is contained in:
Mike Smith
parent
944d5150fa
commit
6f34dba98a
@ -1,5 +1,5 @@
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/*-
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* Copyright (c) 1997 Nicolas Souchu
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* Copyright (c) 1997, 1998 Nicolas Souchu, Michael Smith
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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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@ -23,7 +23,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: ppi.c,v 1.4 1997/08/28 10:15:16 msmith Exp $
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* $Id: ppi.c,v 1.5 1997/09/01 00:51:49 bde Exp $
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*
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*/
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#include "ppi.h"
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@ -35,19 +35,24 @@
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/fcntl.h>
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#include <dev/ppbus/ppbconf.h>
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#include <dev/ppbus/ppi.h>
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struct ppi_data {
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int ppi_unit;
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int ppi_unit;
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int ppi_flags;
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#define HAVE_PPBUS (1<<0)
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struct ppb_device ppi_dev;
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struct ppb_device ppi_dev;
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};
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#define MAXPPI 8 /* XXX not much better! */
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static int nppi = 0;
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static struct ppi_data *ppidata[MAXPPI];
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#define MAXPPI 8 /* XXX not much better! */
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static int nppi = 0;
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static struct ppi_data *ppidata[MAXPPI];
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/*
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* Make ourselves visible as a ppbus driver
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@ -62,7 +67,6 @@ static struct ppb_driver ppidriver = {
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};
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DATA_SET(ppbdriver_set, ppidriver);
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static d_open_t ppiopen;
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static d_close_t ppiclose;
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static d_ioctl_t ppiioctl;
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@ -133,25 +137,86 @@ static int
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ppiopen(dev_t dev, int flags, int fmt, struct proc *p)
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{
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u_int unit = minor(dev);
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struct ppi_data *ppi = ppidata[unit];
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int res;
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if (unit >= nppi)
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return (ENXIO);
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printf("ppi open!\n");
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if (!(ppi->ppi_flags & HAVE_PPBUS))
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if ((res = ppb_request_bus(&ppi->ppi_dev, (flags & O_NONBLOCK) ? PPB_DONTWAIT : (PPB_WAIT | PPB_INTR))))
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return (res);
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return (EOPNOTSUPP);
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ppi->ppi_flags |= HAVE_PPBUS;
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return (0);
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}
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static int
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ppiclose(dev_t dev, int flags, int fmt, struct proc *p)
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{
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return (EOPNOTSUPP);
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u_int unit = minor(dev);
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struct ppi_data *ppi = ppidata[unit];
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if (ppi->ppi_flags & HAVE_PPBUS)
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ppb_release_bus(&ppi->ppi_dev);
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ppi->ppi_flags &= ~HAVE_PPBUS;
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return (0);
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}
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static int
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ppiioctl(dev_t dev, int cmd, caddr_t data, int flags, struct proc *p)
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{
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return (EOPNOTSUPP);
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u_int unit = minor(dev);
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struct ppi_data *ppi = ppidata[unit];
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int error = 0;
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u_int8_t *val = (u_int8_t *)data;
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switch (cmd) {
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case PPIGDATA: /* get data register */
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*val = ppb_rdtr(&ppi->ppi_dev);
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break;
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case PPIGSTATUS: /* get status bits */
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*val = ppb_rstr(&ppi->ppi_dev);
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break;
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case PPIGCTRL: /* get control bits */
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*val = ppb_rctr(&ppi->ppi_dev);
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break;
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case PPIGEPP: /* get EPP bits */
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*val = ppb_repp(&ppi->ppi_dev);
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break;
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case PPIGECR: /* get ECP bits */
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*val = ppb_recr(&ppi->ppi_dev);
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break;
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case PPIGFIFO: /* read FIFO */
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*val = ppb_rfifo(&ppi->ppi_dev);
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break;
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case PPISDATA: /* set data register */
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ppb_wdtr(&ppi->ppi_dev, *val);
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break;
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case PPISSTATUS: /* set status bits */
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ppb_wstr(&ppi->ppi_dev, *val);
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break;
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case PPISCTRL: /* set control bits */
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ppb_wctr(&ppi->ppi_dev, *val);
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break;
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case PPISEPP: /* set EPP bits */
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ppb_wepp(&ppi->ppi_dev, *val);
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break;
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case PPISECR: /* set ECP bits */
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ppb_wecr(&ppi->ppi_dev, *val);
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break;
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case PPISFIFO: /* write FIFO */
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ppb_wfifo(&ppi->ppi_dev, *val);
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break;
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default:
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error = ENOTTY;
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break;
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}
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return (error);
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}
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#ifdef PPI_MODULE
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@ -23,17 +23,29 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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* $Id: ppi.h,v 1.1 1997/08/14 13:57:43 msmith Exp $
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*
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*/
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#ifndef __PPI_H
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#define __PPI_H
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struct ppi_data {
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#ifndef KERNEL
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# include <sys/types.h>
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#endif
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#include <sys/ioccom.h>
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int ppi_unit;
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#define PPIGDATA _IOR('P', 10, u_int8_t)
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#define PPIGSTATUS _IOR('P', 11, u_int8_t)
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#define PPIGCTRL _IOR('P', 12, u_int8_t)
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#define PPIGEPP _IOR('P', 13, u_int8_t)
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#define PPIGECR _IOR('P', 14, u_int8_t)
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#define PPIGFIFO _IOR('P', 15, u_int8_t)
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struct ppb_device ppi_dev;
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};
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#define PPISDATA _IOW('P', 16, u_int8_t)
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#define PPISSTATUS _IOW('P', 17, u_int8_t)
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#define PPISCTRL _IOW('P', 18, u_int8_t)
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#define PPISEPP _IOW('P', 19, u_int8_t)
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#define PPISECR _IOW('P', 20, u_int8_t)
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#define PPISFIFO _IOW('P', 21, u_int8_t)
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#endif
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