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 #include <machine/clock.h> 36 37 #include <dev/ppbus/ppbconf.h> 38 39 #include "ppbus_if.h" 40 41 #include <dev/ppbus/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, PPBPRI, "ppbpoll", hz/100); 78 break; 79 80 case PPB_INTR: 81 default: 82 /* wait 10 ms */ 83 if (((error = tsleep((caddr_t)bus, PPBPRI | 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 /* XXX yet device mode = ppbus mode = chipset mode */ 136 ppb->mode = (mode & PPB_MASK); 137 } 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