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 } 197