2 * Copyright (c) 1997, 1998, 1999 Nicolas Souchu, Michael Smith
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
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 #include "opt_ppb_1284.h"
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/module.h>
38 #include <sys/kernel.h>
40 #include <sys/fcntl.h>
42 #include <machine/bus.h>
43 #include <machine/resource.h>
46 #include <dev/ppbus/ppbconf.h>
47 #include <dev/ppbus/ppb_msq.h>
50 #include <dev/ppbus/ppb_1284.h>
53 #include <dev/ppbus/ppi.h>
57 #include <dev/ppbus/ppbio.h>
65 #define HAVE_PPBUS (1<<0)
66 #define HAD_PPBUS (1<<1)
69 int ppi_mode; /* IEEE1284 mode */
70 char ppi_buffer[BUFSIZE];
73 struct resource *intr_resource; /* interrupt resource */
74 void *intr_cookie; /* interrupt registration cookie */
75 #endif /* PERIPH_1284 */
78 #define DEVTOSOFTC(dev) \
79 ((struct ppi_data *)device_get_softc(dev))
80 #define UNITOSOFTC(unit) \
81 ((struct ppi_data *)devclass_get_softc(ppi_devclass, (unit)))
82 #define UNITODEVICE(unit) \
83 (devclass_get_device(ppi_devclass, (unit)))
85 static devclass_t ppi_devclass;
87 static d_open_t ppiopen;
88 static d_close_t ppiclose;
89 static d_ioctl_t ppiioctl;
90 static d_write_t ppiwrite;
91 static d_read_t ppiread;
93 static struct cdevsw ppi_cdevsw = {
94 .d_version = D_VERSION,
95 .d_flags = D_NEEDGIANT,
107 ppi_enable_intr(device_t ppidev)
110 device_t ppbus = device_get_parent(ppidev);
113 ppb_wctr(ppbus, r | IRQENABLE);
119 ppi_disable_intr(device_t ppidev)
122 device_t ppbus = device_get_parent(ppidev);
125 ppb_wctr(ppbus, r & ~IRQENABLE);
130 #endif /* PERIPH_1284 */
133 ppi_identify(driver_t *driver, device_t parent)
138 dev = device_find_child(parent, "ppi", -1);
140 BUS_ADD_CHILD(parent, 0, "ppi", -1);
147 ppi_probe(device_t dev)
149 struct ppi_data *ppi;
151 /* probe is always ok */
152 device_set_desc(dev, "Parallel I/O");
154 ppi = DEVTOSOFTC(dev);
163 ppi_attach(device_t dev)
167 struct ppi_data *ppi = DEVTOSOFTC(dev);
169 /* declare our interrupt handler */
170 ppi->intr_resource = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
172 #endif /* PERIPH_1284 */
174 make_dev(&ppi_cdevsw, device_get_unit(dev), /* XXX cleanup */
176 0600, "ppi%d", device_get_unit(dev));
186 * Use an IEEE1284 compliant (DB25/DB25) cable with the following tricks:
188 * nStrobe <-> nAck 1 <-> 10
189 * nAutofd <-> Busy 11 <-> 14
190 * nSelectin <-> Select 17 <-> 13
191 * nInit <-> nFault 15 <-> 16
197 device_t ppidev = (device_t)arg;
198 device_t ppbus = device_get_parent(ppidev);
199 struct ppi_data *ppi = DEVTOSOFTC(ppidev);
201 ppi_disable_intr(ppidev);
203 switch (ppb_1284_get_state(ppbus)) {
205 /* accept IEEE1284 negotiation then wakeup a waiting process to
206 * continue negotiation at process level */
207 case PPB_FORWARD_IDLE:
209 if ((ppb_rstr(ppbus) & (SELECT | nBUSY)) ==
211 /* IEEE1284 negotiation */
216 /* Event 2 - prepare for reading the ext. value */
217 ppb_wctr(ppbus, (PCD | STROBE | nINIT) & ~SELECTIN);
219 ppb_1284_set_state(ppbus, PPB_NEGOCIATION);
223 printf("0x%x", ppb_rstr(ppbus));
225 ppb_peripheral_terminate(ppbus, PPB_DONTWAIT);
229 /* wake up any process waiting for negotiation from
230 * remote master host */
232 /* XXX should set a variable to warn the process about
239 printf("?%d", ppb_1284_get_state(ppbus));
241 ppb_1284_set_state(ppbus, PPB_FORWARD_IDLE);
242 ppb_set_mode(ppbus, PPB_COMPATIBLE);
246 ppi_enable_intr(ppidev);
250 #endif /* PERIPH_1284 */
253 ppiopen(struct cdev *dev, int flags, int fmt, struct thread *td)
255 u_int unit = dev2unit(dev);
256 struct ppi_data *ppi = UNITOSOFTC(unit);
257 device_t ppidev = UNITODEVICE(unit);
258 device_t ppbus = device_get_parent(ppidev);
264 if (!(ppi->ppi_flags & HAVE_PPBUS)) {
265 if ((res = ppb_request_bus(ppbus, ppidev,
266 (flags & O_NONBLOCK) ? PPB_DONTWAIT :
267 (PPB_WAIT | PPB_INTR))))
270 ppi->ppi_flags |= HAVE_PPBUS;
273 if (ppi->intr_resource) {
274 /* register our interrupt handler */
275 bus_setup_intr(ppidev, ppi->intr_resource,
276 INTR_TYPE_TTY, NULL, ppiintr, dev,
279 #endif /* PERIPH_1284 */
287 ppiclose(struct cdev *dev, int flags, int fmt, struct thread *td)
289 u_int unit = dev2unit(dev);
290 struct ppi_data *ppi = UNITOSOFTC(unit);
291 device_t ppidev = UNITODEVICE(unit);
292 device_t ppbus = device_get_parent(ppidev);
295 if (!ppi->ppi_count) {
298 switch (ppb_1284_get_state(ppbus)) {
299 case PPB_PERIPHERAL_IDLE:
300 ppb_peripheral_terminate(ppbus, 0);
302 case PPB_REVERSE_IDLE:
304 case PPB_ECP_FORWARD_IDLE:
306 ppb_1284_terminate(ppbus);
309 #endif /* PERIPH_1284 */
311 /* unregistration of interrupt forced by release */
312 ppb_release_bus(ppbus, ppidev);
314 ppi->ppi_flags &= ~HAVE_PPBUS;
323 * IEEE1284 compliant read.
325 * First, try negotiation to BYTE then NIBBLE mode
326 * If no data is available, wait for it otherwise transfer as much as possible
329 ppiread(struct cdev *dev, struct uio *uio, int ioflag)
332 u_int unit = dev2unit(dev);
333 struct ppi_data *ppi = UNITOSOFTC(unit);
334 device_t ppidev = UNITODEVICE(unit);
335 device_t ppbus = device_get_parent(ppidev);
338 switch (ppb_1284_get_state(ppbus)) {
339 case PPB_PERIPHERAL_IDLE:
340 ppb_peripheral_terminate(ppbus, 0);
343 case PPB_FORWARD_IDLE:
344 /* if can't negotiate NIBBLE mode then try BYTE mode,
345 * the peripheral may be a computer
347 if ((ppb_1284_negociate(ppbus,
348 ppi->ppi_mode = PPB_NIBBLE, 0))) {
350 /* XXX Wait 2 seconds to let the remote host some
351 * time to terminate its interrupt
353 tsleep(ppi, PPBPRI, "ppiread", 2*hz);
355 if ((error = ppb_1284_negociate(ppbus,
356 ppi->ppi_mode = PPB_BYTE, 0)))
361 case PPB_REVERSE_IDLE:
363 case PPB_ECP_FORWARD_IDLE:
373 while (uio->uio_resid) {
374 if ((error = ppb_1284_read(ppbus, ppi->ppi_mode,
375 ppi->ppi_buffer, min(BUFSIZE, uio->uio_resid),
381 goto error; /* no more data */
386 if ((error = uiomove(ppi->ppi_buffer, len, uio)))
392 #else /* PERIPH_1284 */
402 * IEEE1284 compliant write
404 * Actually, this is the peripheral side of a remote IEEE1284 read
406 * The first part of the negotiation (IEEE1284 device detection) is
407 * done at interrupt level, then the remaining is done by the writing
410 * Once negotiation done, transfer data
413 ppiwrite(struct cdev *dev, struct uio *uio, int ioflag)
416 u_int unit = dev2unit(dev);
417 struct ppi_data *ppi = UNITOSOFTC(unit);
418 device_t ppidev = UNITODEVICE(unit);
419 device_t ppbus = device_get_parent(ppidev);
420 int len, error = 0, sent;
425 #define ADDRESS MS_PARAM(0, 0, MS_TYP_PTR)
426 #define LENGTH MS_PARAM(0, 1, MS_TYP_INT)
428 struct ppb_microseq msq[] = {
429 { MS_OP_PUT, { MS_UNKNOWN, MS_UNKNOWN, MS_UNKNOWN } },
433 /* negotiate ECP mode */
434 if (ppb_1284_negociate(ppbus, PPB_ECP, 0)) {
435 printf("ppiwrite: ECP negotiation failed\n");
438 while (!error && (len = min(uio->uio_resid, BUFSIZE))) {
439 uiomove(ppi->ppi_buffer, len, uio);
441 ppb_MS_init_msq(msq, 2, ADDRESS, ppi->ppi_buffer, LENGTH, len);
443 error = ppb_MS_microseq(ppbus, msq, &ret);
447 /* we have to be peripheral to be able to send data, so
448 * wait for the appropriate state
450 if (ppb_1284_get_state(ppbus) < PPB_PERIPHERAL_NEGOCIATION)
451 ppb_1284_terminate(ppbus);
453 while (ppb_1284_get_state(ppbus) != PPB_PERIPHERAL_IDLE) {
454 /* XXX should check a variable before sleeping */
459 ppi_enable_intr(ppidev);
461 /* sleep until IEEE1284 negotiation starts */
462 error = tsleep(ppi, PCATCH | PPBPRI, "ppiwrite", 0);
466 /* negotiate peripheral side with BYTE mode */
467 ppb_peripheral_negociate(ppbus, PPB_BYTE, 0);
479 /* negotiation done, write bytes to master host */
480 while ((len = min(uio->uio_resid, BUFSIZE)) != 0) {
481 uiomove(ppi->ppi_buffer, len, uio);
482 if ((error = byte_peripheral_write(ppbus,
483 ppi->ppi_buffer, len, &sent)))
492 #else /* PERIPH_1284 */
500 ppiioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td)
502 u_int unit = dev2unit(dev);
503 device_t ppidev = UNITODEVICE(unit);
504 device_t ppbus = device_get_parent(ppidev);
506 u_int8_t *val = (u_int8_t *)data;
510 case PPIGDATA: /* get data register */
511 *val = ppb_rdtr(ppbus);
513 case PPIGSTATUS: /* get status bits */
514 *val = ppb_rstr(ppbus);
516 case PPIGCTRL: /* get control bits */
517 *val = ppb_rctr(ppbus);
519 case PPIGEPPD: /* get EPP data bits */
520 *val = ppb_repp_D(ppbus);
522 case PPIGECR: /* get ECP bits */
523 *val = ppb_recr(ppbus);
525 case PPIGFIFO: /* read FIFO */
526 *val = ppb_rfifo(ppbus);
528 case PPISDATA: /* set data register */
529 ppb_wdtr(ppbus, *val);
531 case PPISSTATUS: /* set status bits */
532 ppb_wstr(ppbus, *val);
534 case PPISCTRL: /* set control bits */
535 ppb_wctr(ppbus, *val);
537 case PPISEPPD: /* set EPP data bits */
538 ppb_wepp_D(ppbus, *val);
540 case PPISECR: /* set ECP bits */
541 ppb_wecr(ppbus, *val);
543 case PPISFIFO: /* write FIFO */
544 ppb_wfifo(ppbus, *val);
546 case PPIGEPPA: /* get EPP address bits */
547 *val = ppb_repp_A(ppbus);
549 case PPISEPPA: /* set EPP address bits */
550 ppb_wepp_A(ppbus, *val);
560 static device_method_t ppi_methods[] = {
561 /* device interface */
562 DEVMETHOD(device_identify, ppi_identify),
563 DEVMETHOD(device_probe, ppi_probe),
564 DEVMETHOD(device_attach, ppi_attach),
569 static driver_t ppi_driver = {
572 sizeof(struct ppi_data),
574 DRIVER_MODULE(ppi, ppbus, ppi_driver, ppi_devclass, 0, 0);
575 MODULE_DEPEND(ppi, ppbus, 1, 1, 1);