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 * $FreeBSD$ 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 36 #include <dev/ppbus/ppbconf.h> 37 38 #include "ppbus_if.h" 39 40 #include <dev/ppbus/ppbio.h> 41 42 #define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev)) 43 44 /* 45 * ppb_poll_bus() 46 * 47 * Polls the bus 48 * 49 * max is a delay in 10-milliseconds 50 */ 51 int 52 ppb_poll_bus(device_t bus, int max, 53 char mask, char status, int how) 54 { 55 int i, j, error; 56 char r; 57 58 /* try at least up to 10ms */ 59 for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) { 60 for (i = 0; i < 10000; i++) { 61 r = ppb_rstr(bus); 62 DELAY(1); 63 if ((r & mask) == status) 64 return (0); 65 } 66 } 67 68 if (!(how & PPB_POLL)) { 69 for (i = 0; max == PPB_FOREVER || i < max-1; i++) { 70 if ((ppb_rstr(bus) & mask) == status) 71 return (0); 72 73 switch (how) { 74 case PPB_NOINTR: 75 /* wait 10 ms */ 76 tsleep((caddr_t)bus, PPBPRI, "ppbpoll", hz/100); 77 break; 78 79 case PPB_INTR: 80 default: 81 /* wait 10 ms */ 82 if (((error = tsleep((caddr_t)bus, PPBPRI | PCATCH, 83 "ppbpoll", hz/100)) != EWOULDBLOCK) != 0) { 84 return (error); 85 } 86 break; 87 } 88 } 89 } 90 91 return (EWOULDBLOCK); 92 } 93 94 /* 95 * ppb_get_epp_protocol() 96 * 97 * Return the chipset EPP protocol 98 */ 99 int 100 ppb_get_epp_protocol(device_t bus) 101 { 102 uintptr_t protocol; 103 104 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol); 105 106 return (protocol); 107 } 108 109 /* 110 * ppb_get_mode() 111 * 112 */ 113 int 114 ppb_get_mode(device_t bus) 115 { 116 struct ppb_data *ppb = DEVTOSOFTC(bus); 117 118 /* XXX yet device mode = ppbus mode = chipset mode */ 119 return (ppb->mode); 120 } 121 122 /* 123 * ppb_set_mode() 124 * 125 * Set the operating mode of the chipset, return the previous mode 126 */ 127 int 128 ppb_set_mode(device_t bus, int mode) 129 { 130 struct ppb_data *ppb = DEVTOSOFTC(bus); 131 int old_mode = ppb_get_mode(bus); 132 133 if (PPBUS_SETMODE(device_get_parent(bus), mode)) 134 return -1; 135 136 /* XXX yet device mode = ppbus mode = chipset mode */ 137 ppb->mode = (mode & PPB_MASK); 138 139 return (old_mode); 140 } 141 142 /* 143 * ppb_write() 144 * 145 * Write charaters to the port 146 */ 147 int 148 ppb_write(device_t bus, char *buf, int len, int how) 149 { 150 return (PPBUS_WRITE(device_get_parent(bus), buf, len, how)); 151 } 152 153 /* 154 * ppb_reset_epp_timeout() 155 * 156 * Reset the EPP timeout bit in the status register 157 */ 158 int 159 ppb_reset_epp_timeout(device_t bus) 160 { 161 return(PPBUS_RESET_EPP(device_get_parent(bus))); 162 } 163 164 /* 165 * ppb_ecp_sync() 166 * 167 * Wait for the ECP FIFO to be empty 168 */ 169 int 170 ppb_ecp_sync(device_t bus) 171 { 172 return (PPBUS_ECP_SYNC(device_get_parent(bus))); 173 } 174 175 /* 176 * ppb_get_status() 177 * 178 * Read the status register and update the status info 179 */ 180 int 181 ppb_get_status(device_t bus, struct ppb_status *status) 182 { 183 register char r; 184 185 r = status->status = ppb_rstr(bus); 186 187 status->timeout = r & TIMEOUT; 188 status->error = !(r & nFAULT); 189 status->select = r & SELECT; 190 status->paper_end = r & PERROR; 191 status->ack = !(r & nACK); 192 status->busy = !(r & nBUSY); 193 194 return (0); 195 } 196