ppb_base.c revision 55939
1166768Sbmah/*- 2166768Sbmah * Copyright (c) 1997, 1998, 1999 Nicolas Souchu 3166768Sbmah * All rights reserved. 4166768Sbmah * 5166768Sbmah * Redistribution and use in source and binary forms, with or without 6166768Sbmah * modification, are permitted provided that the following conditions 7166768Sbmah * are met: 8166768Sbmah * 1. Redistributions of source code must retain the above copyright 9166768Sbmah * notice, this list of conditions and the following disclaimer. 10166768Sbmah * 2. Redistributions in binary form must reproduce the above copyright 11166768Sbmah * notice, this list of conditions and the following disclaimer in the 12166768Sbmah * documentation and/or other materials provided with the distribution. 13166768Sbmah * 14166768Sbmah * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15183626Ssimon * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16183626Ssimon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17166768Sbmah * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18183626Ssimon * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19166768Sbmah * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20183626Ssimon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21166768Sbmah * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22183626Ssimon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23183626Ssimon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24183626Ssimon * SUCH DAMAGE. 25183626Ssimon * 26183626Ssimon * $FreeBSD: head/sys/dev/ppbus/ppb_base.c 55939 2000-01-14 00:18:06Z nsouch $ 27183626Ssimon * 28183626Ssimon */ 29183626Ssimon#include <sys/param.h> 30183626Ssimon#include <sys/systm.h> 31183626Ssimon#include <sys/kernel.h> 32191511Sblackend#include <sys/module.h> 33183626Ssimon#include <sys/bus.h> 34183626Ssimon 35166771Sbmah#include <machine/clock.h> 36183626Ssimon 37183626Ssimon#include <dev/ppbus/ppbconf.h> 38183626Ssimon 39183626Ssimon#include "ppbus_if.h" 40183626Ssimon 41183626Ssimon#include <dev/ppbus/ppbio.h> 42183626Ssimon 43183626Ssimon#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev)) 44183626Ssimon 45172094Sbmah/* 46183626Ssimon * ppb_poll_bus() 47172094Sbmah * 48183626Ssimon * Polls the bus 49183626Ssimon * 50166768Sbmah * max is a delay in 10-milliseconds 51183626Ssimon */ 52183626Ssimonint 53183626Ssimonppb_poll_bus(device_t bus, int max, 54183626Ssimon char mask, char status, int how) 55183626Ssimon{ 56183626Ssimon int i, j, error; 57166768Sbmah char r; 58183626Ssimon 59183626Ssimon /* try at least up to 10ms */ 60166768Sbmah for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) { 61183626Ssimon for (i = 0; i < 10000; i++) { 62183626Ssimon r = ppb_rstr(bus); 63183626Ssimon DELAY(1); 64166768Sbmah if ((r & mask) == status) 65183626Ssimon return (0); 66183626Ssimon } 67166770Sbmah } 68183626Ssimon 69183626Ssimon if (!(how & PPB_POLL)) { 70183626Ssimon for (i = 0; max == PPB_FOREVER || i < max-1; i++) { 71183626Ssimon if ((ppb_rstr(bus) & mask) == status) 72183626Ssimon return (0); 73183626Ssimon 74166770Sbmah switch (how) { 75183626Ssimon case PPB_NOINTR: 76183626Ssimon /* wait 10 ms */ 77183626Ssimon tsleep((caddr_t)bus, PPBPRI, "ppbpoll", hz/100); 78183626Ssimon break; 79183626Ssimon 80166770Sbmah case PPB_INTR: 81183626Ssimon default: 82183626Ssimon /* wait 10 ms */ 83166770Sbmah if (((error = tsleep((caddr_t)bus, PPBPRI | PCATCH, 84183626Ssimon "ppbpoll", hz/100)) != EWOULDBLOCK) != 0) { 85183626Ssimon return (error); 86183626Ssimon } 87183626Ssimon break; 88166770Sbmah } 89183626Ssimon } 90183626Ssimon } 91183626Ssimon 92166770Sbmah return (EWOULDBLOCK); 93183626Ssimon} 94186204Smurray 95186208Smurray/* 96183626Ssimon * ppb_get_epp_protocol() 97166770Sbmah * 98183626Ssimon * Return the chipset EPP protocol 99186204Smurray */ 100186204Smurrayint 101186204Smurrayppb_get_epp_protocol(device_t bus) 102186204Smurray{ 103183626Ssimon uintptr_t protocol; 104186204Smurray 105186204Smurray BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol); 106186204Smurray 107186204Smurray return (protocol); 108186204Smurray} 109186204Smurray 110186204Smurray/* 111186204Smurray * ppb_get_mode() 112186204Smurray * 113186204Smurray */ 114186204Smurrayint 115186204Smurrayppb_get_mode(device_t bus) 116186204Smurray{ 117186204Smurray struct ppb_data *ppb = DEVTOSOFTC(bus); 118186204Smurray 119186204Smurray /* XXX yet device mode = ppbus mode = chipset mode */ 120186204Smurray return (ppb->mode); 121186204Smurray} 122186204Smurray 123186204Smurray/* 124186204Smurray * ppb_set_mode() 125186204Smurray * 126186204Smurray * Set the operating mode of the chipset, return the previous mode 127186204Smurray */ 128183626Ssimonint 129166770Sbmahppb_set_mode(device_t bus, int mode) 130183626Ssimon{ 131183626Ssimon struct ppb_data *ppb = DEVTOSOFTC(bus); 132183626Ssimon int old_mode = ppb_get_mode(bus); 133183626Ssimon 134183626Ssimon if (!PPBUS_SETMODE(device_get_parent(bus), mode)) { 135166770Sbmah /* XXX yet device mode = ppbus mode = chipset mode */ 136186242Smurray ppb->mode = (mode & PPB_MASK); 137183626Ssimon } 138183626Ssimon 139166770Sbmah return (old_mode); 140183626Ssimon} 141183626Ssimon 142183626Ssimon/* 143183626Ssimon * ppb_write() 144183626Ssimon * 145166770Sbmah * Write charaters to the port 146183626Ssimon */ 147183626Ssimonint 148183626Ssimonppb_write(device_t bus, char *buf, int len, int how) 149183626Ssimon{ 150166770Sbmah return (PPBUS_WRITE(device_get_parent(bus), buf, len, how)); 151183626Ssimon} 152166770Sbmah 153183626Ssimon/* 154183626Ssimon * ppb_reset_epp_timeout() 155166770Sbmah * 156183626Ssimon * Reset the EPP timeout bit in the status register 157183626Ssimon */ 158183626Ssimonint 159183626Ssimonppb_reset_epp_timeout(device_t bus) 160183626Ssimon{ 161183626Ssimon return(PPBUS_RESET_EPP(device_get_parent(bus))); 162166770Sbmah} 163183626Ssimon 164183626Ssimon/* 165183626Ssimon * ppb_ecp_sync() 166183626Ssimon * 167183626Ssimon * Wait for the ECP FIFO to be empty 168183626Ssimon */ 169183626Ssimonint 170183626Ssimonppb_ecp_sync(device_t bus) 171183626Ssimon{ 172183626Ssimon return (PPBUS_ECP_SYNC(device_get_parent(bus))); 173183626Ssimon} 174183626Ssimon 175166770Sbmah/* 176183626Ssimon * ppb_get_status() 177183626Ssimon * 178183626Ssimon * Read the status register and update the status info 179183626Ssimon */ 180183626Ssimonint 181166770Sbmahppb_get_status(device_t bus, struct ppb_status *status) 182183626Ssimon{ 183183626Ssimon register char r; 184183626Ssimon 185183626Ssimon r = status->status = ppb_rstr(bus); 186166770Sbmah 187183626Ssimon status->timeout = r & TIMEOUT; 188183626Ssimon status->error = !(r & nFAULT); 189183626Ssimon status->select = r & SELECT; 190183626Ssimon status->paper_end = r & PERROR; 191183626Ssimon status->ack = !(r & nACK); 192183626Ssimon status->busy = !(r & nBUSY); 193183626Ssimon 194183626Ssimon return (0); 195183626Ssimon} 196183626Ssimon