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/10.0/sys/dev/ppbus/ppb_base.c 227814 2011-11-22 11:35:24Z attilio $");
29
30 #include <sys/param.h>
31 #include <sys/lock.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/mutex.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37
38 #include <dev/ppbus/ppbconf.h>
39
40 #include "ppbus_if.h"
41
42 #include <dev/ppbus/ppbio.h>
43
44 MODULE_VERSION(ppbus, 1);
45
46 #define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
47
48 /*
49 * ppb_poll_bus()
50 *
51 * Polls the bus
52 *
53 * max is a delay in 10-milliseconds
54 */
55 int
56 ppb_poll_bus(device_t bus, int max,
57 char mask, char status, int how)
58 {
59 struct ppb_data *ppb = DEVTOSOFTC(bus);
60 int i, j, error;
61 char r;
62
63 ppb_assert_locked(bus);
64
65 /* try at least up to 10ms */
66 for (j = 0; j < ((how & PPB_POLL) ? max : 1); j++) {
67 for (i = 0; i < 10000; i++) {
68 r = ppb_rstr(bus);
69 DELAY(1);
70 if ((r & mask) == status)
71 return (0);
72 }
73 }
74
75 if (!(how & PPB_POLL)) {
76 for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
77 if ((ppb_rstr(bus) & mask) == status)
78 return (0);
79
80 /* wait 10 ms */
81 error = mtx_sleep((caddr_t)bus, ppb->ppc_lock, PPBPRI |
82 (how == PPB_NOINTR ? 0 : PCATCH), "ppbpoll", hz/100);
83 if (error != EWOULDBLOCK)
84 return (error);
85 }
86 }
87
88 return (EWOULDBLOCK);
89 }
90
91 /*
92 * ppb_get_epp_protocol()
93 *
94 * Return the chipset EPP protocol
95 */
96 int
97 ppb_get_epp_protocol(device_t bus)
98 {
99 uintptr_t protocol;
100
101 ppb_assert_locked(bus);
102 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);
103
104 return (protocol);
105 }
106
107 /*
108 * ppb_get_mode()
109 *
110 */
111 int
112 ppb_get_mode(device_t bus)
113 {
114 struct ppb_data *ppb = DEVTOSOFTC(bus);
115
116 /* XXX yet device mode = ppbus mode = chipset mode */
117 ppb_assert_locked(bus);
118 return (ppb->mode);
119 }
120
121 /*
122 * ppb_set_mode()
123 *
124 * Set the operating mode of the chipset, return the previous mode
125 */
126 int
127 ppb_set_mode(device_t bus, int mode)
128 {
129 struct ppb_data *ppb = DEVTOSOFTC(bus);
130 int old_mode = ppb_get_mode(bus);
131
132 ppb_assert_locked(bus);
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
151 ppb_assert_locked(bus);
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
164 ppb_assert_locked(bus);
165 return(PPBUS_RESET_EPP(device_get_parent(bus)));
166 }
167
168 /*
169 * ppb_ecp_sync()
170 *
171 * Wait for the ECP FIFO to be empty
172 */
173 int
174 ppb_ecp_sync(device_t bus)
175 {
176
177 ppb_assert_locked(bus);
178 return (PPBUS_ECP_SYNC(device_get_parent(bus)));
179 }
180
181 /*
182 * ppb_get_status()
183 *
184 * Read the status register and update the status info
185 */
186 int
187 ppb_get_status(device_t bus, struct ppb_status *status)
188 {
189 register char r;
190
191 ppb_assert_locked(bus);
192
193 r = status->status = ppb_rstr(bus);
194
195 status->timeout = r & TIMEOUT;
196 status->error = !(r & nFAULT);
197 status->select = r & SELECT;
198 status->paper_end = r & PERROR;
199 status->ack = !(r & nACK);
200 status->busy = !(r & nBUSY);
201
202 return (0);
203 }
204
205 void
206 ppb_lock(device_t bus)
207 {
208 struct ppb_data *ppb = DEVTOSOFTC(bus);
209
210 mtx_lock(ppb->ppc_lock);
211 }
212
213 void
214 ppb_unlock(device_t bus)
215 {
216 struct ppb_data *ppb = DEVTOSOFTC(bus);
217
218 mtx_unlock(ppb->ppc_lock);
219 }
220
221 void
222 _ppb_assert_locked(device_t bus, const char *file, int line)
223 {
224
225 mtx_assert_(DEVTOSOFTC(bus)->ppc_lock, MA_OWNED, file, line);
226 }
227
228 void
229 ppb_init_callout(device_t bus, struct callout *c, int flags)
230 {
231 struct ppb_data *ppb = DEVTOSOFTC(bus);
232
233 callout_init_mtx(c, ppb->ppc_lock, flags);
234 }
235
236 int
237 ppb_sleep(device_t bus, void *wchan, int priority, const char *wmesg, int timo)
238 {
239 struct ppb_data *ppb = DEVTOSOFTC(bus);
240
241 return (mtx_sleep(wchan, ppb->ppc_lock, priority, wmesg, timo));
242 }
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