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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/module.h>
34 #include <sys/mutex.h>
35 #include <sys/systm.h>
38 #include <dev/ppbus/ppbconf.h>
42 #include <dev/ppbus/ppbio.h>
44 MODULE_VERSION(ppbus, 1);
46 #define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
53 * max is a delay in 10-milliseconds
56 ppb_poll_bus(device_t bus, int max,
57 uint8_t mask, uint8_t status, int how)
59 struct ppb_data *ppb = DEVTOSOFTC(bus);
63 ppb_assert_locked(bus);
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++) {
70 if ((r & mask) == status)
75 if (!(how & PPB_POLL)) {
76 for (i = 0; max == PPB_FOREVER || i < max-1; i++) {
77 if ((ppb_rstr(bus) & mask) == status)
81 error = mtx_sleep((caddr_t)bus, ppb->ppc_lock, PPBPRI |
82 (how == PPB_NOINTR ? 0 : PCATCH), "ppbpoll", hz/100);
83 if (error != EWOULDBLOCK)
92 * ppb_get_epp_protocol()
94 * Return the chipset EPP protocol
97 ppb_get_epp_protocol(device_t bus)
101 ppb_assert_locked(bus);
102 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_EPP_PROTO, &protocol);
112 ppb_get_mode(device_t bus)
114 struct ppb_data *ppb = DEVTOSOFTC(bus);
116 /* XXX yet device mode = ppbus mode = chipset mode */
117 ppb_assert_locked(bus);
124 * Set the operating mode of the chipset, return the previous mode
127 ppb_set_mode(device_t bus, int mode)
129 struct ppb_data *ppb = DEVTOSOFTC(bus);
130 int old_mode = ppb_get_mode(bus);
132 ppb_assert_locked(bus);
133 if (PPBUS_SETMODE(device_get_parent(bus), mode))
136 /* XXX yet device mode = ppbus mode = chipset mode */
137 ppb->mode = (mode & PPB_MASK);
145 * Write charaters to the port
148 ppb_write(device_t bus, char *buf, int len, int how)
151 ppb_assert_locked(bus);
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)
164 ppb_assert_locked(bus);
165 return(PPBUS_RESET_EPP(device_get_parent(bus)));
171 * Wait for the ECP FIFO to be empty
174 ppb_ecp_sync(device_t bus)
177 ppb_assert_locked(bus);
178 return (PPBUS_ECP_SYNC(device_get_parent(bus)));
184 * Read the status register and update the status info
187 ppb_get_status(device_t bus, struct ppb_status *status)
191 ppb_assert_locked(bus);
193 r = status->status = ppb_rstr(bus);
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);
206 ppb_lock(device_t bus)
208 struct ppb_data *ppb = DEVTOSOFTC(bus);
210 mtx_lock(ppb->ppc_lock);
214 ppb_unlock(device_t bus)
216 struct ppb_data *ppb = DEVTOSOFTC(bus);
218 mtx_unlock(ppb->ppc_lock);
222 _ppb_assert_locked(device_t bus, const char *file, int line)
225 mtx_assert_(DEVTOSOFTC(bus)->ppc_lock, MA_OWNED, file, line);
229 ppb_init_callout(device_t bus, struct callout *c, int flags)
231 struct ppb_data *ppb = DEVTOSOFTC(bus);
233 callout_init_mtx(c, ppb->ppc_lock, flags);
237 ppb_sleep(device_t bus, void *wchan, int priority, const char *wmesg, int timo)
239 struct ppb_data *ppb = DEVTOSOFTC(bus);
241 return (mtx_sleep(wchan, ppb->ppc_lock, priority, wmesg, timo));