194 lines
4.2 KiB
C
194 lines
4.2 KiB
C
/*-
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* Copyright (c) 1997 Nicolas Souchu
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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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: ppb_base.c,v 1.2 1997/08/28 10:15:12 msmith Exp $
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <dev/ppbus/ppbconf.h>
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/*
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* ppb_intr()
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*
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* Function called by ppcintr() when an intr occurs.
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*/
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void
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ppb_intr(struct ppb_link *pl)
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{
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struct ppb_data *ppb = pl->ppbus;
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/*
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* Call chipset dependent code.
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* Should be filled at chipset initialisation if needed.
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*/
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if (pl->adapter->intr_handler)
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(*pl->adapter->intr_handler)(pl->adapter_unit);
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/*
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* Call upper handler iff the bus is owned by a device and
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* this device has specified an interrupt handler.
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*/
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if (ppb->ppb_owner && ppb->ppb_owner->intr)
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(*ppb->ppb_owner->intr)(ppb->ppb_owner->id_unit);
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return;
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}
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/*
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* ppb_poll_device()
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*
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* Polls the device
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*
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* max is a delay in 10-milliseconds
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*/
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int
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ppb_poll_device(struct ppb_device *dev, int max,
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char mask, char status, int how)
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{
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int i, error;
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for (i = 0; i < max; i++) {
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if ((ppb_rstr(dev) & mask) == status)
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return (0);
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switch (how) {
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case PPB_NOINTR:
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/* wait 10 ms */
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if ((error = tsleep((caddr_t)dev, PPBPRI,
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"ppbpoll", hz/100)))
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return (error);
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break;
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case PPB_INTR:
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default:
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/* wait 10 ms */
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if ((error = tsleep((caddr_t)dev, PPBPRI | PCATCH,
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"ppbpoll", hz/100)))
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return (error);
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break;
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}
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}
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return (EWOULDBLOCK);
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}
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/*
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* ppb_reset_epp_timeout()
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*
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* Reset the EPP timeout bit in the status register.
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*/
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int
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ppb_reset_epp_timeout(struct ppb_device *dev)
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{
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struct ppb_data *ppb = dev->ppb;
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if (ppb->ppb_owner != dev)
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return (EACCES);
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(*ppb->ppb_link->adapter->reset_epp_timeout)(dev->id_unit);
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return (0);
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}
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/*
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* ppb_ecp_sync()
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*
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* Wait for the ECP FIFO to be empty.
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*/
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int
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ppb_ecp_sync(struct ppb_device *dev)
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{
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struct ppb_data *ppb = dev->ppb;
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if (ppb->ppb_owner != dev)
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return (EACCES);
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(*ppb->ppb_link->adapter->ecp_sync)(dev->id_unit);
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return (0);
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}
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/*
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* ppb_get_mode()
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*
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* Read the mode (SPP, EPP...) of the chipset.
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*/
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int
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ppb_get_mode(struct ppb_device *dev)
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{
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return (dev->ppb->ppb_link->mode);
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}
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/*
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* ppb_get_epp_protocol()
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*
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* Read the EPP protocol (1.9 or 1.7).
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*/
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int
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ppb_get_epp_protocol(struct ppb_device *dev)
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{
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return (dev->ppb->ppb_link->epp_protocol);
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}
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/*
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* ppb_get_irq()
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*
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* Return the irq, 0 if none.
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*/
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int
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ppb_get_irq(struct ppb_device *dev)
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{
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return (dev->ppb->ppb_link->id_irq);
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}
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/*
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* ppb_get_status()
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*
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* Read the status register and update the status info.
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*/
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int
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ppb_get_status(struct ppb_device *dev, struct ppb_status *status)
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{
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struct ppb_data *ppb = dev->ppb;
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register char r;
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if (ppb->ppb_owner != dev)
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return (EACCES);
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r = status->status = ppb_rstr(dev);
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status->timeout = r & TIMEOUT;
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status->error = !(r & nFAULT);
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status->select = r & SELECT;
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status->paper_end = r & ERROR;
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status->ack = !(r & nACK);
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status->busy = !(r & nBUSY);
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return (0);
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}
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