ppb_base.c revision 28257 
1/*-
2 * Copyright (c) 1997 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 *	$Id$
27 *
28 */
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/errno.h>
32#include <sys/conf.h>
33#include <sys/proc.h>
34#include <sys/buf.h>
35#include <sys/kernel.h>
36#include <sys/malloc.h>
37#include <sys/uio.h>
38#include <sys/syslog.h>
39
40#include <machine/clock.h>
41#include <machine/lpt.h>
42
43#include <vm/vm.h>
44#include <vm/vm_param.h>
45#include <vm/pmap.h>
46
47#include <i386/isa/isa.h>
48#include <i386/isa/isa_device.h>
49
50#include <dev/ppbus/ppbconf.h>
51
52/*
53 * ppb_intr()
54 *
55 * Function called by ppcintr() when an intr occurs.
56 */
57void
58ppb_intr(struct ppb_link *pl)
59{
60	struct ppb_data *ppb = pl->ppbus;
61
62	/*
63	 * Call chipset dependent code.
64	 * Should be filled at chipset initialisation if needed.
65	 */
66	if (pl->adapter->intr_handler)
67		(*pl->adapter->intr_handler)(pl->adapter_unit);
68
69	/*
70	 * Call upper handler iff the bus is owned by a device and
71	 * this device has specified an interrupt handler.
72	 */
73	if (ppb->ppb_owner && ppb->ppb_owner->intr)
74		(*ppb->ppb_owner->intr)(ppb->ppb_owner->id_unit);
75
76	return;
77}
78
79/*
80 * ppb_poll_device()
81 *
82 * Polls the device
83 *
84 * max is a delay in 10-milliseconds
85 */
86int
87ppb_poll_device(struct ppb_device *dev, int max,
88		char mask, char status, int how)
89{
90	int i, error;
91
92	for (i = 0; i < max; i++) {
93		if ((ppb_rstr(dev) & mask) == status)
94			return (0);
95
96		switch (how) {
97		case PPB_NOINTR:
98			/* wait 10 ms */
99			if ((error = tsleep((caddr_t)dev, PPBPRI,
100						"ppbpoll", hz/100)))
101				return (error);
102			break;
103
104		case PPB_INTR:
105		default:
106			/* wait 10 ms */
107			if ((error = tsleep((caddr_t)dev, PPBPRI | PCATCH,
108						"ppbpoll", hz/100)))
109				return (error);
110			break;
111		}
112	}
113
114	return (EWOULDBLOCK);
115}
116
117/*
118 * ppb_reset_epp_timeout()
119 *
120 * Reset the EPP timeout bit in the status register.
121 */
122int
123ppb_reset_epp_timeout(struct ppb_device *dev)
124{
125	struct ppb_data *ppb = dev->ppb;
126
127	if (ppb->ppb_owner != dev)
128		return (EACCES);
129
130	(*ppb->ppb_link->adapter->reset_epp_timeout)(dev->id_unit);
131
132	return (0);
133}
134
135/*
136 * ppb_ecp_sync()
137 *
138 * Wait for the ECP FIFO to be empty.
139 */
140int
141ppb_ecp_sync(struct ppb_device *dev)
142{
143	struct ppb_data *ppb = dev->ppb;
144
145	if (ppb->ppb_owner != dev)
146		return (EACCES);
147
148	(*ppb->ppb_link->adapter->ecp_sync)(dev->id_unit);
149
150	return (0);
151}
152
153/*
154 * ppb_get_mode()
155 *
156 * Read the mode (SPP, EPP...) of the chipset.
157 */
158int
159ppb_get_mode(struct ppb_device *dev)
160{
161	return (dev->ppb->ppb_link->mode);
162}
163
164/*
165 * ppb_get_epp_protocol()
166 *
167 * Read the EPP protocol (1.9 or 1.7).
168 */
169int
170ppb_get_epp_protocol(struct ppb_device *dev)
171{
172	return (dev->ppb->ppb_link->epp_protocol);
173}
174
175/*
176 * ppb_get_irq()
177 *
178 * Return the irq, 0 if none.
179 */
180int
181ppb_get_irq(struct ppb_device *dev)
182{
183	return (dev->ppb->ppb_link->id_irq);
184}
185
186/*
187 * ppb_get_status()
188 *
189 * Read the status register and update the status info.
190 */
191int
192ppb_get_status(struct ppb_device *dev, struct ppb_status *status)
193{
194	struct ppb_data *ppb = dev->ppb;
195	register char r;
196
197	if (ppb->ppb_owner != dev)
198		return (EACCES);
199
200	r = status->status = ppb_rstr(dev);
201
202	status->timeout	= r & TIMEOUT;
203	status->error	= !(r & nFAULT);
204	status->select	= r & SELECT;
205	status->paper_end = r & ERROR;
206	status->ack	= !(r & nACK);
207	status->busy	= !(r & nBUSY);
208
209	return (0);
210}
211