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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/5.4/sys/dev/ppbus/ppb_base.c 119418 2003-08-24 17:55:58Z obrien $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/bus.h>
35
36 #include <dev/ppbus/ppbconf.h>
37
38 #include "ppbus_if.h"
39
40 #include <dev/ppbus/ppbio.h>
41
42 MODULE_VERSION(ppbus, 1);
43
44 #define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
45
46 /*
47 * ppb_poll_bus()
48 *
49 * Polls the bus
50 *
51 * max is a delay in 10-milliseconds
52 */
53 int
54 ppb_poll_bus(device_t bus, int max,
55 char mask, char status, int how)
56 {
57 int i, j, error;
58 char r;
59
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++) {
63 r = ppb_rstr(bus);
64 DELAY(1);
65 if ((r & mask) == status)
66 return (0);
67 }
68 }
69
70 if (!(how & PPB_POLL)) {
71 for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
72 if ((ppb_rstr(bus) & mask) == status)
73 return (0);
74
75 switch (how) {
76 case PPB_NOINTR:
77 /* wait 10 ms */
78 tsleep((caddr_t)bus, PPBPRI, "ppbpoll", hz/100);
79 break;
80
81 case PPB_INTR:
82 default:
83 /* wait 10 ms */
84 if (((error = tsleep((caddr_t)bus, PPBPRI | PCATCH,
85 "ppbpoll", hz/100)) != EWOULDBLOCK) != 0) {
86 return (error);
87 }
88 break;
89 }
90 }
91 }
92
93 return (EWOULDBLOCK);
94 }
95
96 /*
97 * ppb_get_epp_protocol()
98 *
99 * Return the chipset EPP protocol
100 */
101 int
102 ppb_get_epp_protocol(device_t bus)
103 {
104 uintptr_t protocol;
105
106 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);
107
108 return (protocol);
109 }
110
111 /*
112 * ppb_get_mode()
113 *
114 */
115 int
116 ppb_get_mode(device_t bus)
117 {
118 struct ppb_data *ppb = DEVTOSOFTC(bus);
119
120 /* XXX yet device mode = ppbus mode = chipset mode */
121 return (ppb->mode);
122 }
123
124 /*
125 * ppb_set_mode()
126 *
127 * Set the operating mode of the chipset, return the previous mode
128 */
129 int
130 ppb_set_mode(device_t bus, int mode)
131 {
132 struct ppb_data *ppb = DEVTOSOFTC(bus);
133 int old_mode = ppb_get_mode(bus);
134
135 if (PPBUS_SETMODE(device_get_parent(bus), mode))
136 return -1;
137
138 /* XXX yet device mode = ppbus mode = chipset mode */
139 ppb->mode = (mode & PPB_MASK);
140
141 return (old_mode);
142 }
143
144 /*
145 * ppb_write()
146 *
147 * Write charaters to the port
148 */
149 int
150 ppb_write(device_t bus, char *buf, int len, int how)
151 {
152 return (PPBUS_WRITE(device_get_parent(bus), buf, len, how));
153 }
154
155 /*
156 * ppb_reset_epp_timeout()
157 *
158 * Reset the EPP timeout bit in the status register
159 */
160 int
161 ppb_reset_epp_timeout(device_t bus)
162 {
163 return(PPBUS_RESET_EPP(device_get_parent(bus)));
164 }
165
166 /*
167 * ppb_ecp_sync()
168 *
169 * Wait for the ECP FIFO to be empty
170 */
171 int
172 ppb_ecp_sync(device_t bus)
173 {
174 return (PPBUS_ECP_SYNC(device_get_parent(bus)));
175 }
176
177 /*
178 * ppb_get_status()
179 *
180 * Read the status register and update the status info
181 */
182 int
183 ppb_get_status(device_t bus, struct ppb_status *status)
184 {
185 register char r;
186
187 r = status->status = ppb_rstr(bus);
188
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);
195
196 return (0);
197 }
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