2 paride.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
5 This is the base module for the family of device drivers
6 that support parallel port IDE devices.
12 1.01 GRG 1998.05.03 Use spinlocks
13 1.02 GRG 1998.05.05 init_proto, release_proto, ktti
14 1.03 GRG 1998.08.15 eliminate compiler warning
15 1.04 GRG 1998.11.28 added support for FRIQ
16 1.05 TMW 2000.06.06 use parport_find_number instead of
18 1.06 TMW 2001.03.26 more sane parport-or-not resource management
21 #define PI_VERSION "1.06"
23 #include <linux/module.h>
24 #include <linux/kmod.h>
25 #include <linux/types.h>
26 #include <linux/kernel.h>
27 #include <linux/ioport.h>
28 #include <linux/string.h>
29 #include <linux/spinlock.h>
30 #include <linux/wait.h>
31 #include <linux/sched.h> /* TASK_* */
32 #include <linux/parport.h>
36 MODULE_LICENSE("GPL");
40 static struct pi_protocol *protocols[MAX_PROTOS];
42 static DEFINE_SPINLOCK(pi_spinlock);
44 void pi_write_regr(PIA * pi, int cont, int regr, int val)
46 pi->proto->write_regr(pi, cont, regr, val);
49 EXPORT_SYMBOL(pi_write_regr);
51 int pi_read_regr(PIA * pi, int cont, int regr)
53 return pi->proto->read_regr(pi, cont, regr);
56 EXPORT_SYMBOL(pi_read_regr);
58 void pi_write_block(PIA * pi, char *buf, int count)
60 pi->proto->write_block(pi, buf, count);
63 EXPORT_SYMBOL(pi_write_block);
65 void pi_read_block(PIA * pi, char *buf, int count)
67 pi->proto->read_block(pi, buf, count);
70 EXPORT_SYMBOL(pi_read_block);
72 static void pi_wake_up(void *p)
76 void (*cont) (void) = NULL;
78 spin_lock_irqsave(&pi_spinlock, flags);
80 if (pi->claim_cont && !parport_claim(pi->pardev)) {
81 cont = pi->claim_cont;
82 pi->claim_cont = NULL;
86 spin_unlock_irqrestore(&pi_spinlock, flags);
94 int pi_schedule_claimed(PIA * pi, void (*cont) (void))
98 spin_lock_irqsave(&pi_spinlock, flags);
99 if (pi->pardev && parport_claim(pi->pardev)) {
100 pi->claim_cont = cont;
101 spin_unlock_irqrestore(&pi_spinlock, flags);
105 spin_unlock_irqrestore(&pi_spinlock, flags);
108 EXPORT_SYMBOL(pi_schedule_claimed);
110 void pi_do_claimed(PIA * pi, void (*cont) (void))
112 if (pi_schedule_claimed(pi, cont))
116 EXPORT_SYMBOL(pi_do_claimed);
118 static void pi_claim(PIA * pi)
125 !parport_claim((struct pardevice *) pi->pardev));
128 static void pi_unclaim(PIA * pi)
132 parport_release((struct pardevice *) (pi->pardev));
135 void pi_connect(PIA * pi)
138 pi->proto->connect(pi);
141 EXPORT_SYMBOL(pi_connect);
143 void pi_disconnect(PIA * pi)
145 pi->proto->disconnect(pi);
149 EXPORT_SYMBOL(pi_disconnect);
151 static void pi_unregister_parport(PIA * pi)
154 parport_unregister_device((struct pardevice *) (pi->pardev));
159 void pi_release(PIA * pi)
161 pi_unregister_parport(pi);
162 if (pi->proto->release_proto)
163 pi->proto->release_proto(pi);
164 module_put(pi->proto->owner);
167 EXPORT_SYMBOL(pi_release);
169 static int default_test_proto(PIA * pi, char *scratch, int verbose)
174 pi->proto->connect(pi);
176 for (j = 0; j < 2; j++) {
177 pi_write_regr(pi, 0, 6, 0xa0 + j * 0x10);
178 for (k = 0; k < 256; k++) {
179 pi_write_regr(pi, 0, 2, k ^ 0xaa);
180 pi_write_regr(pi, 0, 3, k ^ 0x55);
181 if (pi_read_regr(pi, 0, 2) != (k ^ 0xaa))
185 pi->proto->disconnect(pi);
188 printk("%s: %s: port 0x%x, mode %d, test=(%d,%d)\n",
189 pi->device, pi->proto->name, pi->port,
190 pi->mode, e[0], e[1]);
192 return (e[0] && e[1]); /* not here if both > 0 */
195 static int pi_test_proto(PIA * pi, char *scratch, int verbose)
200 if (pi->proto->test_proto)
201 res = pi->proto->test_proto(pi, scratch, verbose);
203 res = default_test_proto(pi, scratch, verbose);
209 int paride_register(PIP * pr)
213 for (k = 0; k < MAX_PROTOS; k++)
214 if (protocols[k] && !strcmp(pr->name, protocols[k]->name)) {
215 printk("paride: %s protocol already registered\n",
220 while ((k < MAX_PROTOS) && (protocols[k]))
222 if (k == MAX_PROTOS) {
223 printk("paride: protocol table full\n");
228 printk("paride: %s registered as protocol %d\n", pr->name, k);
232 EXPORT_SYMBOL(paride_register);
234 void paride_unregister(PIP * pr)
238 if (protocols[pr->index] != pr) {
239 printk("paride: %s not registered\n", pr->name);
242 protocols[pr->index] = NULL;
245 EXPORT_SYMBOL(paride_unregister);
247 static int pi_register_parport(PIA * pi, int verbose)
249 struct parport *port;
251 port = parport_find_base(pi->port);
255 pi->pardev = parport_register_device(port,
257 pi_wake_up, NULL, 0, (void *) pi);
258 parport_put_port(port);
262 init_waitqueue_head(&pi->parq);
265 printk("%s: 0x%x is %s\n", pi->device, pi->port, port->name);
267 pi->parname = (char *) port->name;
272 static int pi_probe_mode(PIA * pi, int max, char *scratch, int verbose)
276 if (pi->mode != -1) {
280 if (pi->mode >= pi->proto->epp_first)
282 if ((range == 8) && (pi->port % 8))
284 pi->reserved = range;
285 return (!pi_test_proto(pi, scratch, verbose));
288 for (pi->mode = 0; pi->mode < max; pi->mode++) {
290 if (pi->mode >= pi->proto->epp_first)
292 if ((range == 8) && (pi->port % 8))
294 pi->reserved = range;
295 if (!pi_test_proto(pi, scratch, verbose))
302 static int pi_probe_unit(PIA * pi, int unit, char *scratch, int verbose)
311 e = pi->proto->max_units;
314 if (!pi_register_parport(pi, verbose))
317 if (pi->proto->test_port) {
319 max = pi->proto->test_port(pi);
322 max = pi->proto->max_mode;
324 if (pi->proto->probe_unit) {
326 for (pi->unit = s; pi->unit < e; pi->unit++)
327 if (pi->proto->probe_unit(pi)) {
329 if (pi_probe_mode(pi, max, scratch, verbose))
331 pi_unregister_parport(pi);
335 pi_unregister_parport(pi);
339 if (!pi_probe_mode(pi, max, scratch, verbose)) {
340 pi_unregister_parport(pi);
347 int pi_init(PIA * pi, int autoprobe, int port, int mode,
348 int unit, int protocol, int delay, char *scratch,
349 int devtype, int verbose, char *device)
352 int lpts[7] = { 0x3bc, 0x378, 0x278, 0x268, 0x27c, 0x26c, 0 };
358 request_module("paride_protocol");
363 } else if ((s < 0) || (s >= MAX_PROTOS) || (port <= 0) ||
364 (!protocols[s]) || (unit < 0) ||
365 (unit >= protocols[s]->max_units)) {
366 printk("%s: Invalid parameters\n", device);
370 for (p = s; p < e; p++) {
371 struct pi_protocol *proto = protocols[p];
375 if (!try_module_get(proto->owner))
379 if (proto->init_proto && proto->init_proto(pi) < 0) {
381 module_put(proto->owner);
385 pi->delay = pi->proto->default_delay;
388 pi->devtype = devtype;
393 init_waitqueue_head(&pi->parq);
395 pi->claim_cont = NULL;
400 if (pi_probe_unit(pi, unit, scratch, verbose))
405 while ((pi->port = lpts[k++]))
407 (pi, unit, scratch, verbose))
412 if (pi->proto->release_proto)
413 pi->proto->release_proto(pi);
414 module_put(proto->owner);
419 printk("%s: Autoprobe failed\n", device);
421 printk("%s: Adapter not found\n", device);
426 printk("%s: Sharing %s at 0x%x\n", pi->device,
427 pi->parname, pi->port);
429 pi->proto->log_adapter(pi, scratch, verbose);
434 EXPORT_SYMBOL(pi_init);