198 lines
4.2 KiB
C
198 lines
4.2 KiB
C
/*-
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* Copyright (c) 1997, 1998, 1999 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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 <sys/module.h>
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#include <sys/bus.h>
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#include <dev/ppbus/ppbconf.h>
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#include "ppbus_if.h"
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#include <dev/ppbus/ppbio.h>
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MODULE_VERSION(ppbus, 1);
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#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
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/*
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* ppb_poll_bus()
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*
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* Polls the bus
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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_bus(device_t bus, int max,
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char mask, char status, int how)
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{
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int i, j, error;
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char r;
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/* try at least up to 10ms */
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for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) {
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for (i = 0; i < 10000; i++) {
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r = ppb_rstr(bus);
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DELAY(1);
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if ((r & mask) == status)
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return (0);
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}
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}
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if (!(how & PPB_POLL)) {
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for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
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if ((ppb_rstr(bus) & 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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pause("ppbpoll", hz/100);
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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)bus, PPBPRI | PCATCH,
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"ppbpoll", hz/100)) != EWOULDBLOCK) != 0) {
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return (error);
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}
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break;
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}
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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_get_epp_protocol()
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*
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* Return the chipset EPP protocol
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*/
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int
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ppb_get_epp_protocol(device_t bus)
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{
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uintptr_t protocol;
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BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);
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return (protocol);
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}
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/*
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* ppb_get_mode()
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*
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*/
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int
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ppb_get_mode(device_t bus)
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{
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struct ppb_data *ppb = DEVTOSOFTC(bus);
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/* XXX yet device mode = ppbus mode = chipset mode */
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return (ppb->mode);
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}
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/*
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* ppb_set_mode()
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*
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* Set the operating mode of the chipset, return the previous mode
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*/
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int
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ppb_set_mode(device_t bus, int mode)
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{
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struct ppb_data *ppb = DEVTOSOFTC(bus);
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int old_mode = ppb_get_mode(bus);
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if (PPBUS_SETMODE(device_get_parent(bus), mode))
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return (-1);
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/* XXX yet device mode = ppbus mode = chipset mode */
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ppb->mode = (mode & PPB_MASK);
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return (old_mode);
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}
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/*
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* ppb_write()
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*
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* Write charaters to the port
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*/
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int
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ppb_write(device_t bus, char *buf, int len, int how)
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{
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return (PPBUS_WRITE(device_get_parent(bus), buf, len, how));
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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(device_t bus)
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{
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return(PPBUS_RESET_EPP(device_get_parent(bus)));
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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(device_t bus)
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{
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return (PPBUS_ECP_SYNC(device_get_parent(bus)));
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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(device_t bus, struct ppb_status *status)
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{
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register char r;
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r = status->status = ppb_rstr(bus);
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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 & PERROR;
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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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