freebsd-skq/sys/dev/ppbus/ppb_base.c
nsouch 59fc142474 Port of ppbus standalone framework to the newbus system.
Note1: the correct interrupt level is invoked correctly for each driver.
       For this purpose, drivers request the bus before being able to
       call BUS_SETUP_INTR and BUS_TEARDOWN_INTR call is forced by the ppbus
       core when drivers release it. Thus, when BUS_SETUP_INTR is called
       at ppbus driver level, ppbus checks that the caller owns the
       bus and stores the interrupt handler cookie (in order to unregister
       it later).

       Printing is impossible while plip link is up is still TRUE.
       vpo (ZIP driver) and lpt are make in such a way that
       using the ZIP and printing concurrently is permitted is also TRUE.

Note2: specific chipset detection is not done by default. PPC_PROBE_CHIPSET
       is now needed to force chipset detection. If set, the flags 0x40
       still avoid detection at boot.

Port of the pcf(4) driver to the newbus system (was previously directly
connected to the rootbus and attached by a bogus pcf_isa_probe function).
2000-01-14 00:18:06 +00:00

196 lines
4.2 KiB
C

/*-
* Copyright (c) 1997, 1998, 1999 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.
*
* $FreeBSD$
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/clock.h>
#include <dev/ppbus/ppbconf.h>
#include "ppbus_if.h"
#include <dev/ppbus/ppbio.h>
#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
/*
* ppb_poll_bus()
*
* Polls the bus
*
* max is a delay in 10-milliseconds
*/
int
ppb_poll_bus(device_t bus, int max,
char mask, char status, int how)
{
int i, j, error;
char r;
/* try at least up to 10ms */
for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) {
for (i = 0; i < 10000; i++) {
r = ppb_rstr(bus);
DELAY(1);
if ((r & mask) == status)
return (0);
}
}
if (!(how & PPB_POLL)) {
for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
if ((ppb_rstr(bus) & mask) == status)
return (0);
switch (how) {
case PPB_NOINTR:
/* wait 10 ms */
tsleep((caddr_t)bus, PPBPRI, "ppbpoll", hz/100);
break;
case PPB_INTR:
default:
/* wait 10 ms */
if (((error = tsleep((caddr_t)bus, PPBPRI | PCATCH,
"ppbpoll", hz/100)) != EWOULDBLOCK) != 0) {
return (error);
}
break;
}
}
}
return (EWOULDBLOCK);
}
/*
* ppb_get_epp_protocol()
*
* Return the chipset EPP protocol
*/
int
ppb_get_epp_protocol(device_t bus)
{
uintptr_t protocol;
BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);
return (protocol);
}
/*
* ppb_get_mode()
*
*/
int
ppb_get_mode(device_t bus)
{
struct ppb_data *ppb = DEVTOSOFTC(bus);
/* XXX yet device mode = ppbus mode = chipset mode */
return (ppb->mode);
}
/*
* ppb_set_mode()
*
* Set the operating mode of the chipset, return the previous mode
*/
int
ppb_set_mode(device_t bus, int mode)
{
struct ppb_data *ppb = DEVTOSOFTC(bus);
int old_mode = ppb_get_mode(bus);
if (!PPBUS_SETMODE(device_get_parent(bus), mode)) {
/* XXX yet device mode = ppbus mode = chipset mode */
ppb->mode = (mode & PPB_MASK);
}
return (old_mode);
}
/*
* ppb_write()
*
* Write charaters to the port
*/
int
ppb_write(device_t bus, char *buf, int len, int how)
{
return (PPBUS_WRITE(device_get_parent(bus), buf, len, how));
}
/*
* ppb_reset_epp_timeout()
*
* Reset the EPP timeout bit in the status register
*/
int
ppb_reset_epp_timeout(device_t bus)
{
return(PPBUS_RESET_EPP(device_get_parent(bus)));
}
/*
* ppb_ecp_sync()
*
* Wait for the ECP FIFO to be empty
*/
int
ppb_ecp_sync(device_t bus)
{
return (PPBUS_ECP_SYNC(device_get_parent(bus)));
}
/*
* ppb_get_status()
*
* Read the status register and update the status info
*/
int
ppb_get_status(device_t bus, struct ppb_status *status)
{
register char r;
r = status->status = ppb_rstr(bus);
status->timeout = r & TIMEOUT;
status->error = !(r & nFAULT);
status->select = r & SELECT;
status->paper_end = r & PERROR;
status->ack = !(r & nACK);
status->busy = !(r & nBUSY);
return (0);
}