Lines Matching refs:pi
45 void pi_write_regr(PIA * pi, int cont, int regr, int val)
47 pi->proto->write_regr(pi, cont, regr, val);
52 int pi_read_regr(PIA * pi, int cont, int regr)
54 return pi->proto->read_regr(pi, cont, regr);
59 void pi_write_block(PIA * pi, char *buf, int count)
61 pi->proto->write_block(pi, buf, count);
66 void pi_read_block(PIA * pi, char *buf, int count)
68 pi->proto->read_block(pi, buf, count);
75 PIA *pi = (PIA *) p;
81 if (pi->claim_cont && !parport_claim(pi->pardev)) {
82 cont = pi->claim_cont;
83 pi->claim_cont = NULL;
84 pi->claimed = 1;
89 wake_up(&(pi->parq));
95 int pi_schedule_claimed(PIA * pi, void (*cont) (void))
100 if (pi->pardev && parport_claim(pi->pardev)) {
101 pi->claim_cont = cont;
105 pi->claimed = 1;
111 void pi_do_claimed(PIA * pi, void (*cont) (void))
113 if (pi_schedule_claimed(pi, cont))
119 static void pi_claim(PIA * pi)
121 if (pi->claimed)
123 pi->claimed = 1;
124 if (pi->pardev)
125 wait_event(pi->parq,
126 !parport_claim((struct pardevice *) pi->pardev));
129 static void pi_unclaim(PIA * pi)
131 pi->claimed = 0;
132 if (pi->pardev)
133 parport_release((struct pardevice *) (pi->pardev));
136 void pi_connect(PIA * pi)
138 pi_claim(pi);
139 pi->proto->connect(pi);
144 void pi_disconnect(PIA * pi)
146 pi->proto->disconnect(pi);
147 pi_unclaim(pi);
152 static void pi_unregister_parport(PIA * pi)
154 if (pi->pardev) {
155 parport_unregister_device((struct pardevice *) (pi->pardev));
156 pi->pardev = NULL;
160 void pi_release(PIA * pi)
162 pi_unregister_parport(pi);
163 if (pi->proto->release_proto)
164 pi->proto->release_proto(pi);
165 module_put(pi->proto->owner);
170 static int default_test_proto(PIA * pi, char *scratch, int verbose)
175 pi->proto->connect(pi);
178 pi_write_regr(pi, 0, 6, 0xa0 + j * 0x10);
180 pi_write_regr(pi, 0, 2, k ^ 0xaa);
181 pi_write_regr(pi, 0, 3, k ^ 0x55);
182 if (pi_read_regr(pi, 0, 2) != (k ^ 0xaa))
186 pi->proto->disconnect(pi);
190 pi->device, pi->proto->name, pi->port,
191 pi->mode, e[0], e[1]);
196 static int pi_test_proto(PIA * pi, char *scratch, int verbose)
200 pi_claim(pi);
201 if (pi->proto->test_proto)
202 res = pi->proto->test_proto(pi, scratch, verbose);
204 res = default_test_proto(pi, scratch, verbose);
205 pi_unclaim(pi);
248 static int pi_register_parport(PIA *pi, int verbose, int unit)
253 port = parport_find_base(pi->port);
258 par_cb.private = (void *)pi;
259 pi->pardev = parport_register_dev_model(port, pi->device, &par_cb,
262 if (!pi->pardev)
265 init_waitqueue_head(&pi->parq);
268 printk("%s: 0x%x is %s\n", pi->device, pi->port, port->name);
270 pi->parname = (char *) port->name;
275 static int pi_probe_mode(PIA * pi, int max, char *scratch, int verbose)
279 if (pi->mode != -1) {
280 if (pi->mode >= max)
283 if (pi->mode >= pi->proto->epp_first)
285 if ((range == 8) && (pi->port % 8))
287 pi->reserved = range;
288 return (!pi_test_proto(pi, scratch, verbose));
291 for (pi->mode = 0; pi->mode < max; pi->mode++) {
293 if (pi->mode >= pi->proto->epp_first)
295 if ((range == 8) && (pi->port % 8))
297 pi->reserved = range;
298 if (!pi_test_proto(pi, scratch, verbose))
299 best = pi->mode;
301 pi->mode = best;
305 static int pi_probe_unit(PIA * pi, int unit, char *scratch, int verbose)
314 e = pi->proto->max_units;
317 if (!pi_register_parport(pi, verbose, s))
320 if (pi->proto->test_port) {
321 pi_claim(pi);
322 max = pi->proto->test_port(pi);
323 pi_unclaim(pi);
325 max = pi->proto->max_mode;
327 if (pi->proto->probe_unit) {
328 pi_claim(pi);
329 for (pi->unit = s; pi->unit < e; pi->unit++)
330 if (pi->proto->probe_unit(pi)) {
331 pi_unclaim(pi);
332 if (pi_probe_mode(pi, max, scratch, verbose))
334 pi_unregister_parport(pi);
337 pi_unclaim(pi);
338 pi_unregister_parport(pi);
342 if (!pi_probe_mode(pi, max, scratch, verbose)) {
343 pi_unregister_parport(pi);
350 int pi_init(PIA * pi, int autoprobe, int port, int mode,
380 pi->proto = proto;
381 pi->private = 0;
382 if (proto->init_proto && proto->init_proto(pi) < 0) {
383 pi->proto = NULL;
388 pi->delay = pi->proto->default_delay;
390 pi->delay = delay;
391 pi->devtype = devtype;
392 pi->device = device;
394 pi->parname = NULL;
395 pi->pardev = NULL;
396 init_waitqueue_head(&pi->parq);
397 pi->claimed = 0;
398 pi->claim_cont = NULL;
400 pi->mode = mode;
402 pi->port = port;
403 if (pi_probe_unit(pi, unit, scratch, verbose))
405 pi->port = 0;
408 while ((pi->port = lpts[k++]))
410 (pi, unit, scratch, verbose))
412 if (pi->port)
415 if (pi->proto->release_proto)
416 pi->proto->release_proto(pi);
420 if (!pi->port) {
428 if (pi->parname)
429 printk("%s: Sharing %s at 0x%x\n", pi->device,
430 pi->parname, pi->port);
432 pi->proto->log_adapter(pi, scratch, verbose);