sys/bus/ppbus/ppb_base.c

   1 /*-
   2  * Copyright (c) 1997, 1998, 1999 Nicolas Souchu
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/ppbus/ppb_base.c,v 1.10.2.1 2000/08/01 23:26:26 n_hibma Exp $
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/kernel.h>
  32 #include <sys/module.h>
  33 #include <sys/bus.h>
  34
  35 #include <machine/clock.h>
  36
  37 #include "ppbconf.h"
  38
  39 #include "ppbus_if.h"
  40
  41 #include "ppbio.h"
  42
  43 #define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
  44
  45 /*
  46  * ppb_poll_bus()
  47  *
  48  * Polls the bus
  49  *
  50  * max is a delay in 10-milliseconds
  51  */
  52 int
  53 ppb_poll_bus(device_t bus, int max,
  54              char mask, char status, int how)
  55 {
  56         int i, j, error;
  57         char r;
  58
  59         /* try at least up to 10ms */
  60         for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) {
  61                 for (i = 0; i < 10000; i++) {
  62                         r = ppb_rstr(bus);
  63                         DELAY(1);
  64                         if ((r & mask) == status)
  65                                 return (0);
  66                 }
  67         }
  68
  69         if (!(how & PPB_POLL)) {
  70            for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
  71                 if ((ppb_rstr(bus) & mask) == status)
  72                         return (0);
  73
  74                 switch (how) {
  75                 case PPB_NOINTR:
  76                         /* wait 10 ms */
  77                         tsleep((caddr_t)bus, 0, "ppbpoll", hz/100);
  78                         break;
  79
  80                 case PPB_INTR:
  81                 default:
  82                         /* wait 10 ms */
  83                         if (((error = tsleep((caddr_t)bus, PCATCH,
  84                             "ppbpoll", hz/100)) != EWOULDBLOCK) != 0) {
  85                                 return (error);
  86                         }
  87                         break;
  88                 }
  89            }
  90         }
  91
  92         return (EWOULDBLOCK);
  93 }
  94
  95 /*
  96  * ppb_get_epp_protocol()
  97  *
  98  * Return the chipset EPP protocol
  99  */
 100 int
 101 ppb_get_epp_protocol(device_t bus)
 102 {
 103         uintptr_t protocol;
 104
 105         BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);
 106
 107         return (protocol);
 108 }
 109
 110 /*
 111  * ppb_get_mode()
 112  *
 113  */
 114 int
 115 ppb_get_mode(device_t bus)
 116 {
 117         struct ppb_data *ppb = DEVTOSOFTC(bus);
 118
 119         /* XXX yet device mode = ppbus mode = chipset mode */
 120         return (ppb->mode);
 121 }
 122
 123 /*
 124  * ppb_set_mode()
 125  *
 126  * Set the operating mode of the chipset, return the previous mode
 127  */
 128 int
 129 ppb_set_mode(device_t bus, int mode)
 130 {
 131         struct ppb_data *ppb = DEVTOSOFTC(bus);
 132         int old_mode = ppb_get_mode(bus);
 133
 134         if (PPBUS_SETMODE(device_get_parent(bus), mode))
 135                 return -1;
 136
 137         /* XXX yet device mode = ppbus mode = chipset mode */
 138         ppb->mode = (mode & PPB_MASK);
 139
 140         return (old_mode);
 141 }
 142
 143 /*
 144  * ppb_write()
 145  *
 146  * Write charaters to the port
 147  */
 148 int
 149 ppb_write(device_t bus, char *buf, int len, int how)
 150 {
 151         return (PPBUS_WRITE(device_get_parent(bus), buf, len, how));
 152 }
 153
 154 /*
 155  * ppb_reset_epp_timeout()
 156  *
 157  * Reset the EPP timeout bit in the status register
 158  */
 159 int
 160 ppb_reset_epp_timeout(device_t bus)
 161 {
 162         return(PPBUS_RESET_EPP(device_get_parent(bus)));
 163 }
 164
 165 /*
 166  * ppb_ecp_sync()
 167  *
 168  * Wait for the ECP FIFO to be empty
 169  */
 170 int
 171 ppb_ecp_sync(device_t bus)
 172 {
 173         return (PPBUS_ECP_SYNC(device_get_parent(bus)));
 174 }
 175
 176 /*
 177  * ppb_get_status()
 178  *
 179  * Read the status register and update the status info
 180  */
 181 int
 182 ppb_get_status(device_t bus, struct ppb_status *status)
 183 {
 184         char r;
 185
 186         r = status->status = ppb_rstr(bus);
 187
 188         status->timeout = r & TIMEOUT;
 189         status->error   = !(r & nFAULT);
 190         status->select  = r & SELECT;
 191         status->paper_end = r & PERROR;
 192         status->ack     = !(r & nACK);
 193         status->busy    = !(r & nBUSY);
 194
 195         return (0);
 196 }