2 * Copyright (c) 1997, 1998, 1999 Nicolas Souchu
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/sys/dev/ppbus/ppb_base.c,v 1.10.2.1 2000/08/01 23:26:26 n_hibma Exp $
27 * $DragonFly: src/sys/bus/ppbus/ppb_base.c,v 1.5 2003/08/07 21:16:47 dillon Exp $
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
36 #include <machine/clock.h>
44 #define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
51 * max is a delay in 10-milliseconds
54 ppb_poll_bus(device_t bus, int max,
55 char mask, char status, int how)
60 /* try at least up to 10ms */
61 for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) {
62 for (i = 0; i < 10000; i++) {
65 if ((r & mask) == status)
70 if (!(how & PPB_POLL)) {
71 for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
72 if ((ppb_rstr(bus) & mask) == status)
78 tsleep((caddr_t)bus, 0, "ppbpoll", hz/100);
84 if (((error = tsleep((caddr_t)bus, PCATCH,
85 "ppbpoll", hz/100)) != EWOULDBLOCK) != 0) {
97 * ppb_get_epp_protocol()
99 * Return the chipset EPP protocol
102 ppb_get_epp_protocol(device_t bus)
106 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);
116 ppb_get_mode(device_t bus)
118 struct ppb_data *ppb = DEVTOSOFTC(bus);
120 /* XXX yet device mode = ppbus mode = chipset mode */
127 * Set the operating mode of the chipset, return the previous mode
130 ppb_set_mode(device_t bus, int mode)
132 struct ppb_data *ppb = DEVTOSOFTC(bus);
133 int old_mode = ppb_get_mode(bus);
135 if (PPBUS_SETMODE(device_get_parent(bus), mode))
138 /* XXX yet device mode = ppbus mode = chipset mode */
139 ppb->mode = (mode & PPB_MASK);
147 * Write charaters to the port
150 ppb_write(device_t bus, char *buf, int len, int how)
152 return (PPBUS_WRITE(device_get_parent(bus), buf, len, how));
156 * ppb_reset_epp_timeout()
158 * Reset the EPP timeout bit in the status register
161 ppb_reset_epp_timeout(device_t bus)
163 return(PPBUS_RESET_EPP(device_get_parent(bus)));
169 * Wait for the ECP FIFO to be empty
172 ppb_ecp_sync(device_t bus)
174 return (PPBUS_ECP_SYNC(device_get_parent(bus)));
180 * Read the status register and update the status info
183 ppb_get_status(device_t bus, struct ppb_status *status)
187 r = status->status = ppb_rstr(bus);
189 status->timeout = r & TIMEOUT;
190 status->error = !(r & nFAULT);
191 status->select = r & SELECT;
192 status->paper_end = r & PERROR;
193 status->ack = !(r & nACK);
194 status->busy = !(r & nBUSY);