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1// SPDX-License-Identifier: GPL-2.0-only
2/* Low-level parallel-port routines for 8255-based PC-style hardware.
3 *
4 * Authors: Phil Blundell <philb@gnu.org>
5 * Tim Waugh <tim@cyberelk.demon.co.uk>
6 * Jose Renau <renau@acm.org>
7 * David Campbell
8 * Andrea Arcangeli
9 *
10 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
11 *
12 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
13 * DMA support - Bert De Jonghe <bert@sophis.be>
14 * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
15 * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
16 * Various hacks, Fred Barnes, 04/2001
17 * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
18 */
19
20/* This driver should work with any hardware that is broadly compatible
21 * with that in the IBM PC. This applies to the majority of integrated
22 * I/O chipsets that are commonly available. The expected register
23 * layout is:
24 *
25 * base+0 data
26 * base+1 status
27 * base+2 control
28 *
29 * In addition, there are some optional registers:
30 *
31 * base+3 EPP address
32 * base+4 EPP data
33 * base+0x400 ECP config A
34 * base+0x401 ECP config B
35 * base+0x402 ECP control
36 *
37 * All registers are 8 bits wide and read/write. If your hardware differs
38 * only in register addresses (eg because your registers are on 32-bit
39 * word boundaries) then you can alter the constants in parport_pc.h to
40 * accommodate this.
41 *
42 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
43 * but rather will start at port->base_hi.
44 */
45
46#include <linux/module.h>
47#include <linux/init.h>
48#include <linux/sched/signal.h>
49#include <linux/delay.h>
50#include <linux/errno.h>
51#include <linux/interrupt.h>
52#include <linux/ioport.h>
53#include <linux/kernel.h>
54#include <linux/slab.h>
55#include <linux/dma-mapping.h>
56#include <linux/pci.h>
57#include <linux/pnp.h>
58#include <linux/platform_device.h>
59#include <linux/sysctl.h>
60#include <linux/io.h>
61#include <linux/uaccess.h>
62
63#include <asm/dma.h>
64
65#include <linux/parport.h>
66#include <linux/parport_pc.h>
67#include <linux/via.h>
68#include <asm/parport.h>
69
70#define PARPORT_PC_MAX_PORTS PARPORT_MAX
71
72#ifdef CONFIG_ISA_DMA_API
73#define HAS_DMA
74#endif
75
76/* ECR modes */
77#define ECR_SPP 00
78#define ECR_PS2 01
79#define ECR_PPF 02
80#define ECR_ECP 03
81#define ECR_EPP 04
82#define ECR_VND 05
83#define ECR_TST 06
84#define ECR_CNF 07
85#define ECR_MODE_MASK 0xe0
86#define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v))
87
88#undef DEBUG
89
90#define NR_SUPERIOS 3
91static struct superio_struct { /* For Super-IO chips autodetection */
92 int io;
93 int irq;
94 int dma;
95} superios[NR_SUPERIOS] = { {0,},};
96
97static int user_specified;
98#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
99 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
100static int verbose_probing;
101#endif
102static int pci_registered_parport;
103static int pnp_registered_parport;
104
105/* frob_control, but for ECR */
106static void frob_econtrol(struct parport *pb, unsigned char m,
107 unsigned char v)
108{
109 const struct parport_pc_private *priv = pb->physport->private_data;
110 unsigned char ecr_writable = priv->ecr_writable;
111 unsigned char ectr = 0;
112 unsigned char new;
113
114 if (m != 0xff)
115 ectr = inb(ECONTROL(pb));
116
117 new = (ectr & ~m) ^ v;
118 if (ecr_writable)
119 /* All known users of the ECR mask require bit 0 to be set. */
120 new = (new & ecr_writable) | 1;
121
122 pr_debug("frob_econtrol(%02x,%02x): %02x -> %02x\n", m, v, ectr, new);
123
124 outb(new, ECONTROL(pb));
125}
126
127static inline void frob_set_mode(struct parport *p, int mode)
128{
129 frob_econtrol(p, ECR_MODE_MASK, mode << 5);
130}
131
132#ifdef CONFIG_PARPORT_PC_FIFO
133/* Safely change the mode bits in the ECR
134 Returns:
135 0 : Success
136 -EBUSY: Could not drain FIFO in some finite amount of time,
137 mode not changed!
138 */
139static int change_mode(struct parport *p, int m)
140{
141 const struct parport_pc_private *priv = p->physport->private_data;
142 unsigned char oecr;
143 int mode;
144
145 pr_debug("parport change_mode ECP-ISA to mode 0x%02x\n", m);
146
147 if (!priv->ecr) {
148 printk(KERN_DEBUG "change_mode: but there's no ECR!\n");
149 return 0;
150 }
151
152 /* Bits <7:5> contain the mode. */
153 oecr = inb(ECONTROL(p));
154 mode = (oecr >> 5) & 0x7;
155 if (mode == m)
156 return 0;
157
158 if (mode >= 2 && !(priv->ctr & 0x20)) {
159 /* This mode resets the FIFO, so we may
160 * have to wait for it to drain first. */
161 unsigned long expire = jiffies + p->physport->cad->timeout;
162 int counter;
163 switch (mode) {
164 case ECR_PPF: /* Parallel Port FIFO mode */
165 case ECR_ECP: /* ECP Parallel Port mode */
166 /* Busy wait for 200us */
167 for (counter = 0; counter < 40; counter++) {
168 if (inb(ECONTROL(p)) & 0x01)
169 break;
170 if (signal_pending(current))
171 break;
172 udelay(5);
173 }
174
175 /* Poll slowly. */
176 while (!(inb(ECONTROL(p)) & 0x01)) {
177 if (time_after_eq(jiffies, expire))
178 /* The FIFO is stuck. */
179 return -EBUSY;
180 schedule_timeout_interruptible(
181 msecs_to_jiffies(10));
182 if (signal_pending(current))
183 break;
184 }
185 }
186 }
187
188 if (mode >= 2 && m >= 2) {
189 /* We have to go through mode 001 */
190 oecr &= ~(7 << 5);
191 oecr |= ECR_PS2 << 5;
192 ECR_WRITE(p, oecr);
193 }
194
195 /* Set the mode. */
196 oecr &= ~(7 << 5);
197 oecr |= m << 5;
198 ECR_WRITE(p, oecr);
199 return 0;
200}
201#endif /* FIFO support */
202
203/*
204 * Clear TIMEOUT BIT in EPP MODE
205 *
206 * This is also used in SPP detection.
207 */
208static int clear_epp_timeout(struct parport *pb)
209{
210 unsigned char r;
211
212 if (!(parport_pc_read_status(pb) & 0x01))
213 return 1;
214
215 /* To clear timeout some chips require double read */
216 parport_pc_read_status(pb);
217 r = parport_pc_read_status(pb);
218 outb(r | 0x01, STATUS(pb)); /* Some reset by writing 1 */
219 outb(r & 0xfe, STATUS(pb)); /* Others by writing 0 */
220 r = parport_pc_read_status(pb);
221
222 return !(r & 0x01);
223}
224
225/*
226 * Access functions.
227 *
228 * Most of these aren't static because they may be used by the
229 * parport_xxx_yyy macros. extern __inline__ versions of several
230 * of these are in parport_pc.h.
231 */
232
233static void parport_pc_init_state(struct pardevice *dev,
234 struct parport_state *s)
235{
236 s->u.pc.ctr = 0xc;
237 if (dev->irq_func &&
238 dev->port->irq != PARPORT_IRQ_NONE)
239 /* Set ackIntEn */
240 s->u.pc.ctr |= 0x10;
241
242 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
243 * D.Gruszka VScom */
244}
245
246static void parport_pc_save_state(struct parport *p, struct parport_state *s)
247{
248 const struct parport_pc_private *priv = p->physport->private_data;
249 s->u.pc.ctr = priv->ctr;
250 if (priv->ecr)
251 s->u.pc.ecr = inb(ECONTROL(p));
252}
253
254static void parport_pc_restore_state(struct parport *p,
255 struct parport_state *s)
256{
257 struct parport_pc_private *priv = p->physport->private_data;
258 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
259 outb(c, CONTROL(p));
260 priv->ctr = c;
261 if (priv->ecr)
262 ECR_WRITE(p, s->u.pc.ecr);
263}
264
265#ifdef CONFIG_PARPORT_1284
266static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
267 size_t length, int flags)
268{
269 size_t got = 0;
270
271 if (flags & PARPORT_W91284PIC) {
272 unsigned char status;
273 size_t left = length;
274
275 /* use knowledge about data lines..:
276 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
277 * pError is 1 if there are 16 bytes in the Warp's FIFO
278 */
279 status = inb(STATUS(port));
280
281 while (!(status & 0x08) && got < length) {
282 if (left >= 16 && (status & 0x20) && !(status & 0x08)) {
283 /* can grab 16 bytes from warp fifo */
284 if (!((long)buf & 0x03))
285 insl(EPPDATA(port), buf, 4);
286 else
287 insb(EPPDATA(port), buf, 16);
288 buf += 16;
289 got += 16;
290 left -= 16;
291 } else {
292 /* grab single byte from the warp fifo */
293 *((char *)buf) = inb(EPPDATA(port));
294 buf++;
295 got++;
296 left--;
297 }
298 status = inb(STATUS(port));
299 if (status & 0x01) {
300 /* EPP timeout should never occur... */
301 printk(KERN_DEBUG "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n",
302 port->name);
303 clear_epp_timeout(port);
304 }
305 }
306 return got;
307 }
308 if ((length > 1) && ((flags & PARPORT_EPP_FAST_32)
309 || flags & PARPORT_EPP_FAST_16
310 || flags & PARPORT_EPP_FAST_8)) {
311 if ((flags & PARPORT_EPP_FAST_32)
312 && !(((long)buf | length) & 0x03))
313 insl(EPPDATA(port), buf, (length >> 2));
314 else if ((flags & PARPORT_EPP_FAST_16)
315 && !(((long)buf | length) & 0x01))
316 insw(EPPDATA(port), buf, length >> 1);
317 else
318 insb(EPPDATA(port), buf, length);
319 if (inb(STATUS(port)) & 0x01) {
320 clear_epp_timeout(port);
321 return -EIO;
322 }
323 return length;
324 }
325 for (; got < length; got++) {
326 *((char *)buf) = inb(EPPDATA(port));
327 buf++;
328 if (inb(STATUS(port)) & 0x01) {
329 /* EPP timeout */
330 clear_epp_timeout(port);
331 break;
332 }
333 }
334
335 return got;
336}
337
338static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
339 size_t length, int flags)
340{
341 size_t written = 0;
342
343 if ((length > 1) && ((flags & PARPORT_EPP_FAST_32)
344 || flags & PARPORT_EPP_FAST_16
345 || flags & PARPORT_EPP_FAST_8)) {
346 if ((flags & PARPORT_EPP_FAST_32)
347 && !(((long)buf | length) & 0x03))
348 outsl(EPPDATA(port), buf, (length >> 2));
349 else if ((flags & PARPORT_EPP_FAST_16)
350 && !(((long)buf | length) & 0x01))
351 outsw(EPPDATA(port), buf, length >> 1);
352 else
353 outsb(EPPDATA(port), buf, length);
354 if (inb(STATUS(port)) & 0x01) {
355 clear_epp_timeout(port);
356 return -EIO;
357 }
358 return length;
359 }
360 for (; written < length; written++) {
361 outb(*((char *)buf), EPPDATA(port));
362 buf++;
363 if (inb(STATUS(port)) & 0x01) {
364 clear_epp_timeout(port);
365 break;
366 }
367 }
368
369 return written;
370}
371
372static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
373 size_t length, int flags)
374{
375 size_t got = 0;
376
377 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
378 insb(EPPADDR(port), buf, length);
379 if (inb(STATUS(port)) & 0x01) {
380 clear_epp_timeout(port);
381 return -EIO;
382 }
383 return length;
384 }
385 for (; got < length; got++) {
386 *((char *)buf) = inb(EPPADDR(port));
387 buf++;
388 if (inb(STATUS(port)) & 0x01) {
389 clear_epp_timeout(port);
390 break;
391 }
392 }
393
394 return got;
395}
396
397static size_t parport_pc_epp_write_addr(struct parport *port,
398 const void *buf, size_t length,
399 int flags)
400{
401 size_t written = 0;
402
403 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
404 outsb(EPPADDR(port), buf, length);
405 if (inb(STATUS(port)) & 0x01) {
406 clear_epp_timeout(port);
407 return -EIO;
408 }
409 return length;
410 }
411 for (; written < length; written++) {
412 outb(*((char *)buf), EPPADDR(port));
413 buf++;
414 if (inb(STATUS(port)) & 0x01) {
415 clear_epp_timeout(port);
416 break;
417 }
418 }
419
420 return written;
421}
422
423static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
424 size_t length, int flags)
425{
426 size_t got;
427
428 frob_set_mode(port, ECR_EPP);
429 parport_pc_data_reverse(port);
430 parport_pc_write_control(port, 0x4);
431 got = parport_pc_epp_read_data(port, buf, length, flags);
432 frob_set_mode(port, ECR_PS2);
433
434 return got;
435}
436
437static size_t parport_pc_ecpepp_write_data(struct parport *port,
438 const void *buf, size_t length,
439 int flags)
440{
441 size_t written;
442
443 frob_set_mode(port, ECR_EPP);
444 parport_pc_write_control(port, 0x4);
445 parport_pc_data_forward(port);
446 written = parport_pc_epp_write_data(port, buf, length, flags);
447 frob_set_mode(port, ECR_PS2);
448
449 return written;
450}
451
452static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
453 size_t length, int flags)
454{
455 size_t got;
456
457 frob_set_mode(port, ECR_EPP);
458 parport_pc_data_reverse(port);
459 parport_pc_write_control(port, 0x4);
460 got = parport_pc_epp_read_addr(port, buf, length, flags);
461 frob_set_mode(port, ECR_PS2);
462
463 return got;
464}
465
466static size_t parport_pc_ecpepp_write_addr(struct parport *port,
467 const void *buf, size_t length,
468 int flags)
469{
470 size_t written;
471
472 frob_set_mode(port, ECR_EPP);
473 parport_pc_write_control(port, 0x4);
474 parport_pc_data_forward(port);
475 written = parport_pc_epp_write_addr(port, buf, length, flags);
476 frob_set_mode(port, ECR_PS2);
477
478 return written;
479}
480#endif /* IEEE 1284 support */
481
482#ifdef CONFIG_PARPORT_PC_FIFO
483static size_t parport_pc_fifo_write_block_pio(struct parport *port,
484 const void *buf, size_t length)
485{
486 int ret = 0;
487 const unsigned char *bufp = buf;
488 size_t left = length;
489 unsigned long expire = jiffies + port->physport->cad->timeout;
490 const unsigned long fifo = FIFO(port);
491 int poll_for = 8; /* 80 usecs */
492 const struct parport_pc_private *priv = port->physport->private_data;
493 const int fifo_depth = priv->fifo_depth;
494
495 port = port->physport;
496
497 /* We don't want to be interrupted every character. */
498 parport_pc_disable_irq(port);
499 /* set nErrIntrEn and serviceIntr */
500 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
501
502 /* Forward mode. */
503 parport_pc_data_forward(port); /* Must be in PS2 mode */
504
505 while (left) {
506 unsigned char byte;
507 unsigned char ecrval = inb(ECONTROL(port));
508 int i = 0;
509
510 if (need_resched() && time_before(jiffies, expire))
511 /* Can't yield the port. */
512 schedule();
513
514 /* Anyone else waiting for the port? */
515 if (port->waithead) {
516 printk(KERN_DEBUG "Somebody wants the port\n");
517 break;
518 }
519
520 if (ecrval & 0x02) {
521 /* FIFO is full. Wait for interrupt. */
522
523 /* Clear serviceIntr */
524 ECR_WRITE(port, ecrval & ~(1<<2));
525false_alarm:
526 ret = parport_wait_event(port, HZ);
527 if (ret < 0)
528 break;
529 ret = 0;
530 if (!time_before(jiffies, expire)) {
531 /* Timed out. */
532 printk(KERN_DEBUG "FIFO write timed out\n");
533 break;
534 }
535 ecrval = inb(ECONTROL(port));
536 if (!(ecrval & (1<<2))) {
537 if (need_resched() &&
538 time_before(jiffies, expire))
539 schedule();
540
541 goto false_alarm;
542 }
543
544 continue;
545 }
546
547 /* Can't fail now. */
548 expire = jiffies + port->cad->timeout;
549
550poll:
551 if (signal_pending(current))
552 break;
553
554 if (ecrval & 0x01) {
555 /* FIFO is empty. Blast it full. */
556 const int n = left < fifo_depth ? left : fifo_depth;
557 outsb(fifo, bufp, n);
558 bufp += n;
559 left -= n;
560
561 /* Adjust the poll time. */
562 if (i < (poll_for - 2))
563 poll_for--;
564 continue;
565 } else if (i++ < poll_for) {
566 udelay(10);
567 ecrval = inb(ECONTROL(port));
568 goto poll;
569 }
570
571 /* Half-full(call me an optimist) */
572 byte = *bufp++;
573 outb(byte, fifo);
574 left--;
575 }
576 dump_parport_state("leave fifo_write_block_pio", port);
577 return length - left;
578}
579
580#ifdef HAS_DMA
581static size_t parport_pc_fifo_write_block_dma(struct parport *port,
582 const void *buf, size_t length)
583{
584 int ret = 0;
585 unsigned long dmaflag;
586 size_t left = length;
587 const struct parport_pc_private *priv = port->physport->private_data;
588 struct device *dev = port->physport->dev;
589 dma_addr_t dma_addr, dma_handle;
590 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
591 unsigned long start = (unsigned long) buf;
592 unsigned long end = (unsigned long) buf + length - 1;
593
594 dump_parport_state("enter fifo_write_block_dma", port);
595 if (end < MAX_DMA_ADDRESS) {
596 /* If it would cross a 64k boundary, cap it at the end. */
597 if ((start ^ end) & ~0xffffUL)
598 maxlen = 0x10000 - (start & 0xffff);
599
600 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
601 DMA_TO_DEVICE);
602 } else {
603 /* above 16 MB we use a bounce buffer as ISA-DMA
604 is not possible */
605 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
606 dma_addr = priv->dma_handle;
607 dma_handle = 0;
608 }
609
610 port = port->physport;
611
612 /* We don't want to be interrupted every character. */
613 parport_pc_disable_irq(port);
614 /* set nErrIntrEn and serviceIntr */
615 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
616
617 /* Forward mode. */
618 parport_pc_data_forward(port); /* Must be in PS2 mode */
619
620 while (left) {
621 unsigned long expire = jiffies + port->physport->cad->timeout;
622
623 size_t count = left;
624
625 if (count > maxlen)
626 count = maxlen;
627
628 if (!dma_handle) /* bounce buffer ! */
629 memcpy(priv->dma_buf, buf, count);
630
631 dmaflag = claim_dma_lock();
632 disable_dma(port->dma);
633 clear_dma_ff(port->dma);
634 set_dma_mode(port->dma, DMA_MODE_WRITE);
635 set_dma_addr(port->dma, dma_addr);
636 set_dma_count(port->dma, count);
637
638 /* Set DMA mode */
639 frob_econtrol(port, 1<<3, 1<<3);
640
641 /* Clear serviceIntr */
642 frob_econtrol(port, 1<<2, 0);
643
644 enable_dma(port->dma);
645 release_dma_lock(dmaflag);
646
647 /* assume DMA will be successful */
648 left -= count;
649 buf += count;
650 if (dma_handle)
651 dma_addr += count;
652
653 /* Wait for interrupt. */
654false_alarm:
655 ret = parport_wait_event(port, HZ);
656 if (ret < 0)
657 break;
658 ret = 0;
659 if (!time_before(jiffies, expire)) {
660 /* Timed out. */
661 printk(KERN_DEBUG "DMA write timed out\n");
662 break;
663 }
664 /* Is serviceIntr set? */
665 if (!(inb(ECONTROL(port)) & (1<<2))) {
666 cond_resched();
667
668 goto false_alarm;
669 }
670
671 dmaflag = claim_dma_lock();
672 disable_dma(port->dma);
673 clear_dma_ff(port->dma);
674 count = get_dma_residue(port->dma);
675 release_dma_lock(dmaflag);
676
677 cond_resched(); /* Can't yield the port. */
678
679 /* Anyone else waiting for the port? */
680 if (port->waithead) {
681 printk(KERN_DEBUG "Somebody wants the port\n");
682 break;
683 }
684
685 /* update for possible DMA residue ! */
686 buf -= count;
687 left += count;
688 if (dma_handle)
689 dma_addr -= count;
690 }
691
692 /* Maybe got here through break, so adjust for DMA residue! */
693 dmaflag = claim_dma_lock();
694 disable_dma(port->dma);
695 clear_dma_ff(port->dma);
696 left += get_dma_residue(port->dma);
697 release_dma_lock(dmaflag);
698
699 /* Turn off DMA mode */
700 frob_econtrol(port, 1<<3, 0);
701
702 if (dma_handle)
703 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
704
705 dump_parport_state("leave fifo_write_block_dma", port);
706 return length - left;
707}
708#endif
709
710static inline size_t parport_pc_fifo_write_block(struct parport *port,
711 const void *buf, size_t length)
712{
713#ifdef HAS_DMA
714 if (port->dma != PARPORT_DMA_NONE)
715 return parport_pc_fifo_write_block_dma(port, buf, length);
716#endif
717 return parport_pc_fifo_write_block_pio(port, buf, length);
718}
719
720/* Parallel Port FIFO mode (ECP chipsets) */
721static size_t parport_pc_compat_write_block_pio(struct parport *port,
722 const void *buf, size_t length,
723 int flags)
724{
725 size_t written;
726 int r;
727 unsigned long expire;
728 const struct parport_pc_private *priv = port->physport->private_data;
729
730 /* Special case: a timeout of zero means we cannot call schedule().
731 * Also if O_NONBLOCK is set then use the default implementation. */
732 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
733 return parport_ieee1284_write_compat(port, buf,
734 length, flags);
735
736 /* Set up parallel port FIFO mode.*/
737 parport_pc_data_forward(port); /* Must be in PS2 mode */
738 parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0);
739 r = change_mode(port, ECR_PPF); /* Parallel port FIFO */
740 if (r)
741 printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
742 port->name);
743
744 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
745
746 /* Write the data to the FIFO. */
747 written = parport_pc_fifo_write_block(port, buf, length);
748
749 /* Finish up. */
750 /* For some hardware we don't want to touch the mode until
751 * the FIFO is empty, so allow 4 seconds for each position
752 * in the fifo.
753 */
754 expire = jiffies + (priv->fifo_depth * HZ * 4);
755 do {
756 /* Wait for the FIFO to empty */
757 r = change_mode(port, ECR_PS2);
758 if (r != -EBUSY)
759 break;
760 } while (time_before(jiffies, expire));
761 if (r == -EBUSY) {
762
763 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
764
765 /* Prevent further data transfer. */
766 frob_set_mode(port, ECR_TST);
767
768 /* Adjust for the contents of the FIFO. */
769 for (written -= priv->fifo_depth; ; written++) {
770 if (inb(ECONTROL(port)) & 0x2) {
771 /* Full up. */
772 break;
773 }
774 outb(0, FIFO(port));
775 }
776
777 /* Reset the FIFO and return to PS2 mode. */
778 frob_set_mode(port, ECR_PS2);
779 }
780
781 r = parport_wait_peripheral(port,
782 PARPORT_STATUS_BUSY,
783 PARPORT_STATUS_BUSY);
784 if (r)
785 printk(KERN_DEBUG "%s: BUSY timeout (%d) in compat_write_block_pio\n",
786 port->name, r);
787
788 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
789
790 return written;
791}
792
793/* ECP */
794#ifdef CONFIG_PARPORT_1284
795static size_t parport_pc_ecp_write_block_pio(struct parport *port,
796 const void *buf, size_t length,
797 int flags)
798{
799 size_t written;
800 int r;
801 unsigned long expire;
802 const struct parport_pc_private *priv = port->physport->private_data;
803
804 /* Special case: a timeout of zero means we cannot call schedule().
805 * Also if O_NONBLOCK is set then use the default implementation. */
806 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
807 return parport_ieee1284_ecp_write_data(port, buf,
808 length, flags);
809
810 /* Switch to forward mode if necessary. */
811 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
812 /* Event 47: Set nInit high. */
813 parport_frob_control(port,
814 PARPORT_CONTROL_INIT
815 | PARPORT_CONTROL_AUTOFD,
816 PARPORT_CONTROL_INIT
817 | PARPORT_CONTROL_AUTOFD);
818
819 /* Event 49: PError goes high. */
820 r = parport_wait_peripheral(port,
821 PARPORT_STATUS_PAPEROUT,
822 PARPORT_STATUS_PAPEROUT);
823 if (r) {
824 printk(KERN_DEBUG "%s: PError timeout (%d) in ecp_write_block_pio\n",
825 port->name, r);
826 }
827 }
828
829 /* Set up ECP parallel port mode.*/
830 parport_pc_data_forward(port); /* Must be in PS2 mode */
831 parport_pc_frob_control(port,
832 PARPORT_CONTROL_STROBE |
833 PARPORT_CONTROL_AUTOFD,
834 0);
835 r = change_mode(port, ECR_ECP); /* ECP FIFO */
836 if (r)
837 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
838 port->name);
839 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
840
841 /* Write the data to the FIFO. */
842 written = parport_pc_fifo_write_block(port, buf, length);
843
844 /* Finish up. */
845 /* For some hardware we don't want to touch the mode until
846 * the FIFO is empty, so allow 4 seconds for each position
847 * in the fifo.
848 */
849 expire = jiffies + (priv->fifo_depth * (HZ * 4));
850 do {
851 /* Wait for the FIFO to empty */
852 r = change_mode(port, ECR_PS2);
853 if (r != -EBUSY)
854 break;
855 } while (time_before(jiffies, expire));
856 if (r == -EBUSY) {
857
858 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
859
860 /* Prevent further data transfer. */
861 frob_set_mode(port, ECR_TST);
862
863 /* Adjust for the contents of the FIFO. */
864 for (written -= priv->fifo_depth; ; written++) {
865 if (inb(ECONTROL(port)) & 0x2) {
866 /* Full up. */
867 break;
868 }
869 outb(0, FIFO(port));
870 }
871
872 /* Reset the FIFO and return to PS2 mode. */
873 frob_set_mode(port, ECR_PS2);
874
875 /* Host transfer recovery. */
876 parport_pc_data_reverse(port); /* Must be in PS2 mode */
877 udelay(5);
878 parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
879 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
880 if (r)
881 printk(KERN_DEBUG "%s: PE,1 timeout (%d) in ecp_write_block_pio\n",
882 port->name, r);
883
884 parport_frob_control(port,
885 PARPORT_CONTROL_INIT,
886 PARPORT_CONTROL_INIT);
887 r = parport_wait_peripheral(port,
888 PARPORT_STATUS_PAPEROUT,
889 PARPORT_STATUS_PAPEROUT);
890 if (r)
891 printk(KERN_DEBUG "%s: PE,2 timeout (%d) in ecp_write_block_pio\n",
892 port->name, r);
893 }
894
895 r = parport_wait_peripheral(port,
896 PARPORT_STATUS_BUSY,
897 PARPORT_STATUS_BUSY);
898 if (r)
899 printk(KERN_DEBUG "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
900 port->name, r);
901
902 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
903
904 return written;
905}
906#endif /* IEEE 1284 support */
907#endif /* Allowed to use FIFO/DMA */
908
909
910/*
911 * ******************************************
912 * INITIALISATION AND MODULE STUFF BELOW HERE
913 * ******************************************
914 */
915
916/* GCC is not inlining extern inline function later overwritten to non-inline,
917 so we use outlined_ variants here. */
918static const struct parport_operations parport_pc_ops = {
919 .write_data = parport_pc_write_data,
920 .read_data = parport_pc_read_data,
921
922 .write_control = parport_pc_write_control,
923 .read_control = parport_pc_read_control,
924 .frob_control = parport_pc_frob_control,
925
926 .read_status = parport_pc_read_status,
927
928 .enable_irq = parport_pc_enable_irq,
929 .disable_irq = parport_pc_disable_irq,
930
931 .data_forward = parport_pc_data_forward,
932 .data_reverse = parport_pc_data_reverse,
933
934 .init_state = parport_pc_init_state,
935 .save_state = parport_pc_save_state,
936 .restore_state = parport_pc_restore_state,
937
938 .epp_write_data = parport_ieee1284_epp_write_data,
939 .epp_read_data = parport_ieee1284_epp_read_data,
940 .epp_write_addr = parport_ieee1284_epp_write_addr,
941 .epp_read_addr = parport_ieee1284_epp_read_addr,
942
943 .ecp_write_data = parport_ieee1284_ecp_write_data,
944 .ecp_read_data = parport_ieee1284_ecp_read_data,
945 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
946
947 .compat_write_data = parport_ieee1284_write_compat,
948 .nibble_read_data = parport_ieee1284_read_nibble,
949 .byte_read_data = parport_ieee1284_read_byte,
950
951 .owner = THIS_MODULE,
952};
953
954#ifdef CONFIG_PARPORT_PC_SUPERIO
955
956static struct superio_struct *find_free_superio(void)
957{
958 int i;
959 for (i = 0; i < NR_SUPERIOS; i++)
960 if (superios[i].io == 0)
961 return &superios[i];
962 return NULL;
963}
964
965
966/* Super-IO chipset detection, Winbond, SMSC */
967static void show_parconfig_smsc37c669(int io, int key)
968{
969 int cr1, cr4, cra, cr23, cr26, cr27;
970 struct superio_struct *s;
971
972 static const char *const modes[] = {
973 "SPP and Bidirectional (PS/2)",
974 "EPP and SPP",
975 "ECP",
976 "ECP and EPP" };
977
978 outb(key, io);
979 outb(key, io);
980 outb(1, io);
981 cr1 = inb(io + 1);
982 outb(4, io);
983 cr4 = inb(io + 1);
984 outb(0x0a, io);
985 cra = inb(io + 1);
986 outb(0x23, io);
987 cr23 = inb(io + 1);
988 outb(0x26, io);
989 cr26 = inb(io + 1);
990 outb(0x27, io);
991 cr27 = inb(io + 1);
992 outb(0xaa, io);
993
994 if (verbose_probing) {
995 pr_info("SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
996 cr1, cr4, cra, cr23, cr26, cr27);
997
998 /* The documentation calls DMA and IRQ-Lines by letters, so
999 the board maker can/will wire them
1000 appropriately/randomly... G=reserved H=IDE-irq, */
1001 pr_info("SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n",
1002 cr23 * 4,
1003 (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
1004 (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-',
1005 cra & 0x0f);
1006 pr_info("SMSC LPT Config: enabled=%s power=%s\n",
1007 (cr23 * 4 >= 0x100) ? "yes" : "no",
1008 (cr1 & 4) ? "yes" : "no");
1009 pr_info("SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1010 (cr1 & 0x08) ? "Standard mode only (SPP)"
1011 : modes[cr4 & 0x03],
1012 (cr4 & 0x40) ? "1.7" : "1.9");
1013 }
1014
1015 /* Heuristics ! BIOS setup for this mainboard device limits
1016 the choices to standard settings, i.e. io-address and IRQ
1017 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1018 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1019 if (cr23 * 4 >= 0x100) { /* if active */
1020 s = find_free_superio();
1021 if (s == NULL)
1022 pr_info("Super-IO: too many chips!\n");
1023 else {
1024 int d;
1025 switch (cr23 * 4) {
1026 case 0x3bc:
1027 s->io = 0x3bc;
1028 s->irq = 7;
1029 break;
1030 case 0x378:
1031 s->io = 0x378;
1032 s->irq = 7;
1033 break;
1034 case 0x278:
1035 s->io = 0x278;
1036 s->irq = 5;
1037 }
1038 d = (cr26 & 0x0f);
1039 if (d == 1 || d == 3)
1040 s->dma = d;
1041 else
1042 s->dma = PARPORT_DMA_NONE;
1043 }
1044 }
1045}
1046
1047
1048static void show_parconfig_winbond(int io, int key)
1049{
1050 int cr30, cr60, cr61, cr70, cr74, crf0;
1051 struct superio_struct *s;
1052 static const char *const modes[] = {
1053 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1054 "EPP-1.9 and SPP",
1055 "ECP",
1056 "ECP and EPP-1.9",
1057 "Standard (SPP)",
1058 "EPP-1.7 and SPP", /* 5 */
1059 "undefined!",
1060 "ECP and EPP-1.7" };
1061 static char *const irqtypes[] = {
1062 "pulsed low, high-Z",
1063 "follows nACK" };
1064
1065 /* The registers are called compatible-PnP because the
1066 register layout is modelled after ISA-PnP, the access
1067 method is just another ... */
1068 outb(key, io);
1069 outb(key, io);
1070 outb(0x07, io); /* Register 7: Select Logical Device */
1071 outb(0x01, io + 1); /* LD1 is Parallel Port */
1072 outb(0x30, io);
1073 cr30 = inb(io + 1);
1074 outb(0x60, io);
1075 cr60 = inb(io + 1);
1076 outb(0x61, io);
1077 cr61 = inb(io + 1);
1078 outb(0x70, io);
1079 cr70 = inb(io + 1);
1080 outb(0x74, io);
1081 cr74 = inb(io + 1);
1082 outb(0xf0, io);
1083 crf0 = inb(io + 1);
1084 outb(0xaa, io);
1085
1086 if (verbose_probing) {
1087 pr_info("Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n",
1088 cr30, cr60, cr61, cr70, cr74, crf0);
1089 pr_info("Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1090 (cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f);
1091 if ((cr74 & 0x07) > 3)
1092 pr_cont("dma=none\n");
1093 else
1094 pr_cont("dma=%d\n", cr74 & 0x07);
1095 pr_info("Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1096 irqtypes[crf0 >> 7], (crf0 >> 3) & 0x0f);
1097 pr_info("Winbond LPT Config: Port mode=%s\n",
1098 modes[crf0 & 0x07]);
1099 }
1100
1101 if (cr30 & 0x01) { /* the settings can be interrogated later ... */
1102 s = find_free_superio();
1103 if (s == NULL)
1104 pr_info("Super-IO: too many chips!\n");
1105 else {
1106 s->io = (cr60 << 8) | cr61;
1107 s->irq = cr70 & 0x0f;
1108 s->dma = (((cr74 & 0x07) > 3) ?
1109 PARPORT_DMA_NONE : (cr74 & 0x07));
1110 }
1111 }
1112}
1113
1114static void decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1115{
1116 const char *type = "unknown";
1117 int id, progif = 2;
1118
1119 if (devid == devrev)
1120 /* simple heuristics, we happened to read some
1121 non-winbond register */
1122 return;
1123
1124 id = (devid << 8) | devrev;
1125
1126 /* Values are from public data sheets pdf files, I can just
1127 confirm 83977TF is correct :-) */
1128 if (id == 0x9771)
1129 type = "83977F/AF";
1130 else if (id == 0x9773)
1131 type = "83977TF / SMSC 97w33x/97w34x";
1132 else if (id == 0x9774)
1133 type = "83977ATF";
1134 else if ((id & ~0x0f) == 0x5270)
1135 type = "83977CTF / SMSC 97w36x";
1136 else if ((id & ~0x0f) == 0x52f0)
1137 type = "83977EF / SMSC 97w35x";
1138 else if ((id & ~0x0f) == 0x5210)
1139 type = "83627";
1140 else if ((id & ~0x0f) == 0x6010)
1141 type = "83697HF";
1142 else if ((oldid & 0x0f) == 0x0a) {
1143 type = "83877F";
1144 progif = 1;
1145 } else if ((oldid & 0x0f) == 0x0b) {
1146 type = "83877AF";
1147 progif = 1;
1148 } else if ((oldid & 0x0f) == 0x0c) {
1149 type = "83877TF";
1150 progif = 1;
1151 } else if ((oldid & 0x0f) == 0x0d) {
1152 type = "83877ATF";
1153 progif = 1;
1154 } else
1155 progif = 0;
1156
1157 if (verbose_probing)
1158 pr_info("Winbond chip at EFER=0x%x key=0x%02x devid=%02x devrev=%02x oldid=%02x type=%s\n",
1159 efer, key, devid, devrev, oldid, type);
1160
1161 if (progif == 2)
1162 show_parconfig_winbond(efer, key);
1163}
1164
1165static void decode_smsc(int efer, int key, int devid, int devrev)
1166{
1167 const char *type = "unknown";
1168 void (*func)(int io, int key);
1169 int id;
1170
1171 if (devid == devrev)
1172 /* simple heuristics, we happened to read some
1173 non-smsc register */
1174 return;
1175
1176 func = NULL;
1177 id = (devid << 8) | devrev;
1178
1179 if (id == 0x0302) {
1180 type = "37c669";
1181 func = show_parconfig_smsc37c669;
1182 } else if (id == 0x6582)
1183 type = "37c665IR";
1184 else if (devid == 0x65)
1185 type = "37c665GT";
1186 else if (devid == 0x66)
1187 type = "37c666GT";
1188
1189 if (verbose_probing)
1190 pr_info("SMSC chip at EFER=0x%x key=0x%02x devid=%02x devrev=%02x type=%s\n",
1191 efer, key, devid, devrev, type);
1192
1193 if (func)
1194 func(efer, key);
1195}
1196
1197
1198static void winbond_check(int io, int key)
1199{
1200 int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1201
1202 if (!request_region(io, 3, __func__))
1203 return;
1204
1205 origval = inb(io); /* Save original value */
1206
1207 /* First probe without key */
1208 outb(0x20, io);
1209 x_devid = inb(io + 1);
1210 outb(0x21, io);
1211 x_devrev = inb(io + 1);
1212 outb(0x09, io);
1213 x_oldid = inb(io + 1);
1214
1215 outb(key, io);
1216 outb(key, io); /* Write Magic Sequence to EFER, extended
1217 function enable register */
1218 outb(0x20, io); /* Write EFIR, extended function index register */
1219 devid = inb(io + 1); /* Read EFDR, extended function data register */
1220 outb(0x21, io);
1221 devrev = inb(io + 1);
1222 outb(0x09, io);
1223 oldid = inb(io + 1);
1224 outb(0xaa, io); /* Magic Seal */
1225
1226 outb(origval, io); /* in case we poked some entirely different hardware */
1227
1228 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1229 goto out; /* protection against false positives */
1230
1231 decode_winbond(io, key, devid, devrev, oldid);
1232out:
1233 release_region(io, 3);
1234}
1235
1236static void winbond_check2(int io, int key)
1237{
1238 int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1239
1240 if (!request_region(io, 3, __func__))
1241 return;
1242
1243 origval[0] = inb(io); /* Save original values */
1244 origval[1] = inb(io + 1);
1245 origval[2] = inb(io + 2);
1246
1247 /* First probe without the key */
1248 outb(0x20, io + 2);
1249 x_devid = inb(io + 2);
1250 outb(0x21, io + 1);
1251 x_devrev = inb(io + 2);
1252 outb(0x09, io + 1);
1253 x_oldid = inb(io + 2);
1254
1255 outb(key, io); /* Write Magic Byte to EFER, extended
1256 function enable register */
1257 outb(0x20, io + 2); /* Write EFIR, extended function index register */
1258 devid = inb(io + 2); /* Read EFDR, extended function data register */
1259 outb(0x21, io + 1);
1260 devrev = inb(io + 2);
1261 outb(0x09, io + 1);
1262 oldid = inb(io + 2);
1263 outb(0xaa, io); /* Magic Seal */
1264
1265 outb(origval[0], io); /* in case we poked some entirely different hardware */
1266 outb(origval[1], io + 1);
1267 outb(origval[2], io + 2);
1268
1269 if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
1270 goto out; /* protection against false positives */
1271
1272 decode_winbond(io, key, devid, devrev, oldid);
1273out:
1274 release_region(io, 3);
1275}
1276
1277static void smsc_check(int io, int key)
1278{
1279 int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
1280
1281 if (!request_region(io, 3, __func__))
1282 return;
1283
1284 origval = inb(io); /* Save original value */
1285
1286 /* First probe without the key */
1287 outb(0x0d, io);
1288 x_oldid = inb(io + 1);
1289 outb(0x0e, io);
1290 x_oldrev = inb(io + 1);
1291 outb(0x20, io);
1292 x_id = inb(io + 1);
1293 outb(0x21, io);
1294 x_rev = inb(io + 1);
1295
1296 outb(key, io);
1297 outb(key, io); /* Write Magic Sequence to EFER, extended
1298 function enable register */
1299 outb(0x0d, io); /* Write EFIR, extended function index register */
1300 oldid = inb(io + 1); /* Read EFDR, extended function data register */
1301 outb(0x0e, io);
1302 oldrev = inb(io + 1);
1303 outb(0x20, io);
1304 id = inb(io + 1);
1305 outb(0x21, io);
1306 rev = inb(io + 1);
1307 outb(0xaa, io); /* Magic Seal */
1308
1309 outb(origval, io); /* in case we poked some entirely different hardware */
1310
1311 if (x_id == id && x_oldrev == oldrev &&
1312 x_oldid == oldid && x_rev == rev)
1313 goto out; /* protection against false positives */
1314
1315 decode_smsc(io, key, oldid, oldrev);
1316out:
1317 release_region(io, 3);
1318}
1319
1320
1321static void detect_and_report_winbond(void)
1322{
1323 if (verbose_probing)
1324 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1325 winbond_check(0x3f0, 0x87);
1326 winbond_check(0x370, 0x87);
1327 winbond_check(0x2e , 0x87);
1328 winbond_check(0x4e , 0x87);
1329 winbond_check(0x3f0, 0x86);
1330 winbond_check2(0x250, 0x88);
1331 winbond_check2(0x250, 0x89);
1332}
1333
1334static void detect_and_report_smsc(void)
1335{
1336 if (verbose_probing)
1337 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1338 smsc_check(0x3f0, 0x55);
1339 smsc_check(0x370, 0x55);
1340 smsc_check(0x3f0, 0x44);
1341 smsc_check(0x370, 0x44);
1342}
1343
1344static void detect_and_report_it87(void)
1345{
1346 u16 dev;
1347 u8 origval, r;
1348 if (verbose_probing)
1349 printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
1350 if (!request_muxed_region(0x2e, 2, __func__))
1351 return;
1352 origval = inb(0x2e); /* Save original value */
1353 outb(0x87, 0x2e);
1354 outb(0x01, 0x2e);
1355 outb(0x55, 0x2e);
1356 outb(0x55, 0x2e);
1357 outb(0x20, 0x2e);
1358 dev = inb(0x2f) << 8;
1359 outb(0x21, 0x2e);
1360 dev |= inb(0x2f);
1361 if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 ||
1362 dev == 0x8716 || dev == 0x8718 || dev == 0x8726) {
1363 pr_info("IT%04X SuperIO detected\n", dev);
1364 outb(0x07, 0x2E); /* Parallel Port */
1365 outb(0x03, 0x2F);
1366 outb(0xF0, 0x2E); /* BOOT 0x80 off */
1367 r = inb(0x2f);
1368 outb(0xF0, 0x2E);
1369 outb(r | 8, 0x2F);
1370 outb(0x02, 0x2E); /* Lock */
1371 outb(0x02, 0x2F);
1372 } else {
1373 outb(origval, 0x2e); /* Oops, sorry to disturb */
1374 }
1375 release_region(0x2e, 2);
1376}
1377#endif /* CONFIG_PARPORT_PC_SUPERIO */
1378
1379static struct superio_struct *find_superio(struct parport *p)
1380{
1381 int i;
1382 for (i = 0; i < NR_SUPERIOS; i++)
1383 if (superios[i].io == p->base)
1384 return &superios[i];
1385 return NULL;
1386}
1387
1388static int get_superio_dma(struct parport *p)
1389{
1390 struct superio_struct *s = find_superio(p);
1391 if (s)
1392 return s->dma;
1393 return PARPORT_DMA_NONE;
1394}
1395
1396static int get_superio_irq(struct parport *p)
1397{
1398 struct superio_struct *s = find_superio(p);
1399 if (s)
1400 return s->irq;
1401 return PARPORT_IRQ_NONE;
1402}
1403
1404
1405/* --- Mode detection ------------------------------------- */
1406
1407/*
1408 * Checks for port existence, all ports support SPP MODE
1409 * Returns:
1410 * 0 : No parallel port at this address
1411 * PARPORT_MODE_PCSPP : SPP port detected
1412 * (if the user specified an ioport himself,
1413 * this shall always be the case!)
1414 *
1415 */
1416static int parport_SPP_supported(struct parport *pb)
1417{
1418 unsigned char r, w;
1419
1420 /*
1421 * first clear an eventually pending EPP timeout
1422 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1423 * that does not even respond to SPP cycles if an EPP
1424 * timeout is pending
1425 */
1426 clear_epp_timeout(pb);
1427
1428 /* Do a simple read-write test to make sure the port exists. */
1429 w = 0xc;
1430 outb(w, CONTROL(pb));
1431
1432 /* Is there a control register that we can read from? Some
1433 * ports don't allow reads, so read_control just returns a
1434 * software copy. Some ports _do_ allow reads, so bypass the
1435 * software copy here. In addition, some bits aren't
1436 * writable. */
1437 r = inb(CONTROL(pb));
1438 if ((r & 0xf) == w) {
1439 w = 0xe;
1440 outb(w, CONTROL(pb));
1441 r = inb(CONTROL(pb));
1442 outb(0xc, CONTROL(pb));
1443 if ((r & 0xf) == w)
1444 return PARPORT_MODE_PCSPP;
1445 }
1446
1447 if (user_specified)
1448 /* That didn't work, but the user thinks there's a
1449 * port here. */
1450 pr_info("parport 0x%lx (WARNING): CTR: wrote 0x%02x, read 0x%02x\n",
1451 pb->base, w, r);
1452
1453 /* Try the data register. The data lines aren't tri-stated at
1454 * this stage, so we expect back what we wrote. */
1455 w = 0xaa;
1456 parport_pc_write_data(pb, w);
1457 r = parport_pc_read_data(pb);
1458 if (r == w) {
1459 w = 0x55;
1460 parport_pc_write_data(pb, w);
1461 r = parport_pc_read_data(pb);
1462 if (r == w)
1463 return PARPORT_MODE_PCSPP;
1464 }
1465
1466 if (user_specified) {
1467 /* Didn't work, but the user is convinced this is the
1468 * place. */
1469 pr_info("parport 0x%lx (WARNING): DATA: wrote 0x%02x, read 0x%02x\n",
1470 pb->base, w, r);
1471 pr_info("parport 0x%lx: You gave this address, but there is probably no parallel port there!\n",
1472 pb->base);
1473 }
1474
1475 /* It's possible that we can't read the control register or
1476 * the data register. In that case just believe the user. */
1477 if (user_specified)
1478 return PARPORT_MODE_PCSPP;
1479
1480 return 0;
1481}
1482
1483/* Check for ECR
1484 *
1485 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1486 * on these cards actually accesses the CTR.
1487 *
1488 * Modern cards don't do this but reading from ECR will return 0xff
1489 * regardless of what is written here if the card does NOT support
1490 * ECP.
1491 *
1492 * We first check to see if ECR is the same as CTR. If not, the low
1493 * two bits of ECR aren't writable, so we check by writing ECR and
1494 * reading it back to see if it's what we expect.
1495 */
1496static int parport_ECR_present(struct parport *pb)
1497{
1498 struct parport_pc_private *priv = pb->private_data;
1499 unsigned char r = 0xc;
1500
1501 if (!priv->ecr_writable) {
1502 outb(r, CONTROL(pb));
1503 if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) {
1504 outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */
1505
1506 r = inb(CONTROL(pb));
1507 if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
1508 /* Sure that no ECR register exists */
1509 goto no_reg;
1510 }
1511
1512 if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
1513 goto no_reg;
1514
1515 ECR_WRITE(pb, 0x34);
1516 if (inb(ECONTROL(pb)) != 0x35)
1517 goto no_reg;
1518 }
1519
1520 priv->ecr = 1;
1521 outb(0xc, CONTROL(pb));
1522
1523 /* Go to mode 000 */
1524 frob_set_mode(pb, ECR_SPP);
1525
1526 return 1;
1527
1528 no_reg:
1529 outb(0xc, CONTROL(pb));
1530 return 0;
1531}
1532
1533#ifdef CONFIG_PARPORT_1284
1534/* Detect PS/2 support.
1535 *
1536 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1537 * allows us to read data from the data lines. In theory we would get back
1538 * 0xff but any peripheral attached to the port may drag some or all of the
1539 * lines down to zero. So if we get back anything that isn't the contents
1540 * of the data register we deem PS/2 support to be present.
1541 *
1542 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1543 * drivers, but an external peripheral with sufficiently beefy drivers of
1544 * its own can overpower them and assert its own levels onto the bus, from
1545 * where they can then be read back as normal. Ports with this property
1546 * and the right type of device attached are likely to fail the SPP test,
1547 * (as they will appear to have stuck bits) and so the fact that they might
1548 * be misdetected here is rather academic.
1549 */
1550
1551static int parport_PS2_supported(struct parport *pb)
1552{
1553 int ok = 0;
1554
1555 clear_epp_timeout(pb);
1556
1557 /* try to tri-state the buffer */
1558 parport_pc_data_reverse(pb);
1559
1560 parport_pc_write_data(pb, 0x55);
1561 if (parport_pc_read_data(pb) != 0x55)
1562 ok++;
1563
1564 parport_pc_write_data(pb, 0xaa);
1565 if (parport_pc_read_data(pb) != 0xaa)
1566 ok++;
1567
1568 /* cancel input mode */
1569 parport_pc_data_forward(pb);
1570
1571 if (ok) {
1572 pb->modes |= PARPORT_MODE_TRISTATE;
1573 } else {
1574 struct parport_pc_private *priv = pb->private_data;
1575 priv->ctr_writable &= ~0x20;
1576 }
1577
1578 return ok;
1579}
1580
1581#ifdef CONFIG_PARPORT_PC_FIFO
1582static int parport_ECP_supported(struct parport *pb)
1583{
1584 int i;
1585 int config, configb;
1586 int pword;
1587 struct parport_pc_private *priv = pb->private_data;
1588 /* Translate ECP intrLine to ISA irq value */
1589 static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 };
1590
1591 /* If there is no ECR, we have no hope of supporting ECP. */
1592 if (!priv->ecr)
1593 return 0;
1594
1595 /* Find out FIFO depth */
1596 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1597 ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */
1598 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++)
1599 outb(0xaa, FIFO(pb));
1600
1601 /*
1602 * Using LGS chipset it uses ECR register, but
1603 * it doesn't support ECP or FIFO MODE
1604 */
1605 if (i == 1024) {
1606 ECR_WRITE(pb, ECR_SPP << 5);
1607 return 0;
1608 }
1609
1610 priv->fifo_depth = i;
1611 if (verbose_probing)
1612 printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1613
1614 /* Find out writeIntrThreshold */
1615 frob_econtrol(pb, 1<<2, 1<<2);
1616 frob_econtrol(pb, 1<<2, 0);
1617 for (i = 1; i <= priv->fifo_depth; i++) {
1618 inb(FIFO(pb));
1619 udelay(50);
1620 if (inb(ECONTROL(pb)) & (1<<2))
1621 break;
1622 }
1623
1624 if (i <= priv->fifo_depth) {
1625 if (verbose_probing)
1626 printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1627 pb->base, i);
1628 } else
1629 /* Number of bytes we know we can write if we get an
1630 interrupt. */
1631 i = 0;
1632
1633 priv->writeIntrThreshold = i;
1634
1635 /* Find out readIntrThreshold */
1636 frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1637 parport_pc_data_reverse(pb); /* Must be in PS2 mode */
1638 frob_set_mode(pb, ECR_TST); /* Test FIFO */
1639 frob_econtrol(pb, 1<<2, 1<<2);
1640 frob_econtrol(pb, 1<<2, 0);
1641 for (i = 1; i <= priv->fifo_depth; i++) {
1642 outb(0xaa, FIFO(pb));
1643 if (inb(ECONTROL(pb)) & (1<<2))
1644 break;
1645 }
1646
1647 if (i <= priv->fifo_depth) {
1648 if (verbose_probing)
1649 pr_info("0x%lx: readIntrThreshold is %d\n",
1650 pb->base, i);
1651 } else
1652 /* Number of bytes we can read if we get an interrupt. */
1653 i = 0;
1654
1655 priv->readIntrThreshold = i;
1656
1657 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1658 ECR_WRITE(pb, 0xf4); /* Configuration mode */
1659 config = inb(CONFIGA(pb));
1660 pword = (config >> 4) & 0x7;
1661 switch (pword) {
1662 case 0:
1663 pword = 2;
1664 pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
1665 break;
1666 case 2:
1667 pword = 4;
1668 pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
1669 break;
1670 default:
1671 pr_warn("0x%lx: Unknown implementation ID\n", pb->base);
1672 fallthrough; /* Assume 1 */
1673 case 1:
1674 pword = 1;
1675 }
1676 priv->pword = pword;
1677
1678 if (verbose_probing) {
1679 printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
1680 pb->base, 8 * pword);
1681
1682 printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n",
1683 pb->base, config & 0x80 ? "Level" : "Pulses");
1684
1685 configb = inb(CONFIGB(pb));
1686 printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1687 pb->base, config, configb);
1688 printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1689 if ((configb >> 3) & 0x07)
1690 pr_cont("%d", intrline[(configb >> 3) & 0x07]);
1691 else
1692 pr_cont("<none or set by other means>");
1693 pr_cont(" dma=");
1694 if ((configb & 0x03) == 0x00)
1695 pr_cont("<none or set by other means>\n");
1696 else
1697 pr_cont("%d\n", configb & 0x07);
1698 }
1699
1700 /* Go back to mode 000 */
1701 frob_set_mode(pb, ECR_SPP);
1702
1703 return 1;
1704}
1705#endif
1706
1707#ifdef CONFIG_X86_32
1708static int intel_bug_present_check_epp(struct parport *pb)
1709{
1710 const struct parport_pc_private *priv = pb->private_data;
1711 int bug_present = 0;
1712
1713 if (priv->ecr) {
1714 /* store value of ECR */
1715 unsigned char ecr = inb(ECONTROL(pb));
1716 unsigned char i;
1717 for (i = 0x00; i < 0x80; i += 0x20) {
1718 ECR_WRITE(pb, i);
1719 if (clear_epp_timeout(pb)) {
1720 /* Phony EPP in ECP. */
1721 bug_present = 1;
1722 break;
1723 }
1724 }
1725 /* return ECR into the inital state */
1726 ECR_WRITE(pb, ecr);
1727 }
1728
1729 return bug_present;
1730}
1731static int intel_bug_present(struct parport *pb)
1732{
1733/* Check whether the device is legacy, not PCI or PCMCIA. Only legacy is known to be affected. */
1734 if (pb->dev != NULL) {
1735 return 0;
1736 }
1737
1738 return intel_bug_present_check_epp(pb);
1739}
1740#else
1741static int intel_bug_present(struct parport *pb)
1742{
1743 return 0;
1744}
1745#endif /* CONFIG_X86_32 */
1746
1747static int parport_ECPPS2_supported(struct parport *pb)
1748{
1749 const struct parport_pc_private *priv = pb->private_data;
1750 int result;
1751 unsigned char oecr;
1752
1753 if (!priv->ecr)
1754 return 0;
1755
1756 oecr = inb(ECONTROL(pb));
1757 ECR_WRITE(pb, ECR_PS2 << 5);
1758 result = parport_PS2_supported(pb);
1759 ECR_WRITE(pb, oecr);
1760 return result;
1761}
1762
1763/* EPP mode detection */
1764
1765static int parport_EPP_supported(struct parport *pb)
1766{
1767 /*
1768 * Theory:
1769 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1770 * when EPP is possible and is set high when an EPP timeout
1771 * occurs (EPP uses the HALT line to stop the CPU while it does
1772 * the byte transfer, an EPP timeout occurs if the attached
1773 * device fails to respond after 10 micro seconds).
1774 *
1775 * This bit is cleared by either reading it (National Semi)
1776 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1777 * This bit is always high in non EPP modes.
1778 */
1779
1780 /* If EPP timeout bit clear then EPP available */
1781 if (!clear_epp_timeout(pb))
1782 return 0; /* No way to clear timeout */
1783
1784 /* Check for Intel bug. */
1785 if (intel_bug_present(pb))
1786 return 0;
1787
1788 pb->modes |= PARPORT_MODE_EPP;
1789
1790 /* Set up access functions to use EPP hardware. */
1791 pb->ops->epp_read_data = parport_pc_epp_read_data;
1792 pb->ops->epp_write_data = parport_pc_epp_write_data;
1793 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1794 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1795
1796 return 1;
1797}
1798
1799static int parport_ECPEPP_supported(struct parport *pb)
1800{
1801 struct parport_pc_private *priv = pb->private_data;
1802 int result;
1803 unsigned char oecr;
1804
1805 if (!priv->ecr)
1806 return 0;
1807
1808 oecr = inb(ECONTROL(pb));
1809 /* Search for SMC style EPP+ECP mode */
1810 ECR_WRITE(pb, 0x80);
1811 outb(0x04, CONTROL(pb));
1812 result = parport_EPP_supported(pb);
1813
1814 ECR_WRITE(pb, oecr);
1815
1816 if (result) {
1817 /* Set up access functions to use ECP+EPP hardware. */
1818 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1819 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1820 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1821 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1822 }
1823
1824 return result;
1825}
1826
1827#else /* No IEEE 1284 support */
1828
1829/* Don't bother probing for modes we know we won't use. */
1830static int parport_PS2_supported(struct parport *pb) { return 0; }
1831#ifdef CONFIG_PARPORT_PC_FIFO
1832static int parport_ECP_supported(struct parport *pb)
1833{
1834 return 0;
1835}
1836#endif
1837static int parport_EPP_supported(struct parport *pb)
1838{
1839 return 0;
1840}
1841
1842static int parport_ECPEPP_supported(struct parport *pb)
1843{
1844 return 0;
1845}
1846
1847static int parport_ECPPS2_supported(struct parport *pb)
1848{
1849 return 0;
1850}
1851
1852#endif /* No IEEE 1284 support */
1853
1854/* --- IRQ detection -------------------------------------- */
1855
1856/* Only if supports ECP mode */
1857static int programmable_irq_support(struct parport *pb)
1858{
1859 int irq, intrLine;
1860 unsigned char oecr = inb(ECONTROL(pb));
1861 static const int lookup[8] = {
1862 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1863 };
1864
1865 ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
1866
1867 intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
1868 irq = lookup[intrLine];
1869
1870 ECR_WRITE(pb, oecr);
1871 return irq;
1872}
1873
1874static int irq_probe_ECP(struct parport *pb)
1875{
1876 int i;
1877 unsigned long irqs;
1878
1879 irqs = probe_irq_on();
1880
1881 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1882 ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
1883 ECR_WRITE(pb, ECR_TST << 5);
1884
1885 /* If Full FIFO sure that writeIntrThreshold is generated */
1886 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++)
1887 outb(0xaa, FIFO(pb));
1888
1889 pb->irq = probe_irq_off(irqs);
1890 ECR_WRITE(pb, ECR_SPP << 5);
1891
1892 if (pb->irq <= 0)
1893 pb->irq = PARPORT_IRQ_NONE;
1894
1895 return pb->irq;
1896}
1897
1898/*
1899 * This detection seems that only works in National Semiconductors
1900 * This doesn't work in SMC, LGS, and Winbond
1901 */
1902static int irq_probe_EPP(struct parport *pb)
1903{
1904#ifndef ADVANCED_DETECT
1905 return PARPORT_IRQ_NONE;
1906#else
1907 int irqs;
1908 unsigned char oecr;
1909
1910 if (pb->modes & PARPORT_MODE_PCECR)
1911 oecr = inb(ECONTROL(pb));
1912
1913 irqs = probe_irq_on();
1914
1915 if (pb->modes & PARPORT_MODE_PCECR)
1916 frob_econtrol(pb, 0x10, 0x10);
1917
1918 clear_epp_timeout(pb);
1919 parport_pc_frob_control(pb, 0x20, 0x20);
1920 parport_pc_frob_control(pb, 0x10, 0x10);
1921 clear_epp_timeout(pb);
1922
1923 /* Device isn't expecting an EPP read
1924 * and generates an IRQ.
1925 */
1926 parport_pc_read_epp(pb);
1927 udelay(20);
1928
1929 pb->irq = probe_irq_off(irqs);
1930 if (pb->modes & PARPORT_MODE_PCECR)
1931 ECR_WRITE(pb, oecr);
1932 parport_pc_write_control(pb, 0xc);
1933
1934 if (pb->irq <= 0)
1935 pb->irq = PARPORT_IRQ_NONE;
1936
1937 return pb->irq;
1938#endif /* Advanced detection */
1939}
1940
1941static int irq_probe_SPP(struct parport *pb)
1942{
1943 /* Don't even try to do this. */
1944 return PARPORT_IRQ_NONE;
1945}
1946
1947/* We will attempt to share interrupt requests since other devices
1948 * such as sound cards and network cards seem to like using the
1949 * printer IRQs.
1950 *
1951 * When ECP is available we can autoprobe for IRQs.
1952 * NOTE: If we can autoprobe it, we can register the IRQ.
1953 */
1954static int parport_irq_probe(struct parport *pb)
1955{
1956 struct parport_pc_private *priv = pb->private_data;
1957
1958 if (priv->ecr) {
1959 pb->irq = programmable_irq_support(pb);
1960
1961 if (pb->irq == PARPORT_IRQ_NONE)
1962 pb->irq = irq_probe_ECP(pb);
1963 }
1964
1965 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
1966 (pb->modes & PARPORT_MODE_EPP))
1967 pb->irq = irq_probe_EPP(pb);
1968
1969 clear_epp_timeout(pb);
1970
1971 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
1972 pb->irq = irq_probe_EPP(pb);
1973
1974 clear_epp_timeout(pb);
1975
1976 if (pb->irq == PARPORT_IRQ_NONE)
1977 pb->irq = irq_probe_SPP(pb);
1978
1979 if (pb->irq == PARPORT_IRQ_NONE)
1980 pb->irq = get_superio_irq(pb);
1981
1982 return pb->irq;
1983}
1984
1985/* --- DMA detection -------------------------------------- */
1986
1987/* Only if chipset conforms to ECP ISA Interface Standard */
1988static int programmable_dma_support(struct parport *p)
1989{
1990 unsigned char oecr = inb(ECONTROL(p));
1991 int dma;
1992
1993 frob_set_mode(p, ECR_CNF);
1994
1995 dma = inb(CONFIGB(p)) & 0x07;
1996 /* 000: Indicates jumpered 8-bit DMA if read-only.
1997 100: Indicates jumpered 16-bit DMA if read-only. */
1998 if ((dma & 0x03) == 0)
1999 dma = PARPORT_DMA_NONE;
2000
2001 ECR_WRITE(p, oecr);
2002 return dma;
2003}
2004
2005static int parport_dma_probe(struct parport *p)
2006{
2007 const struct parport_pc_private *priv = p->private_data;
2008 if (priv->ecr) /* ask ECP chipset first */
2009 p->dma = programmable_dma_support(p);
2010 if (p->dma == PARPORT_DMA_NONE) {
2011 /* ask known Super-IO chips proper, although these
2012 claim ECP compatible, some don't report their DMA
2013 conforming to ECP standards */
2014 p->dma = get_superio_dma(p);
2015 }
2016
2017 return p->dma;
2018}
2019
2020/* --- Initialisation code -------------------------------- */
2021
2022static LIST_HEAD(ports_list);
2023static DEFINE_SPINLOCK(ports_lock);
2024
2025static struct parport *__parport_pc_probe_port(unsigned long int base,
2026 unsigned long int base_hi,
2027 int irq, int dma,
2028 struct device *dev,
2029 int irqflags,
2030 unsigned int mode_mask,
2031 unsigned char ecr_writable)
2032{
2033 struct parport_pc_private *priv;
2034 struct parport_operations *ops;
2035 struct parport *p;
2036 int probedirq = PARPORT_IRQ_NONE;
2037 struct resource *base_res;
2038 struct resource *ECR_res = NULL;
2039 struct resource *EPP_res = NULL;
2040 struct platform_device *pdev = NULL;
2041 int ret;
2042
2043 if (!dev) {
2044 /* We need a physical device to attach to, but none was
2045 * provided. Create our own. */
2046 pdev = platform_device_register_simple("parport_pc",
2047 base, NULL, 0);
2048 if (IS_ERR(pdev))
2049 return NULL;
2050 dev = &pdev->dev;
2051
2052 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
2053 if (ret) {
2054 dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
2055 dma = PARPORT_DMA_NONE;
2056 }
2057 }
2058
2059 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
2060 if (!ops)
2061 goto out1;
2062
2063 priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
2064 if (!priv)
2065 goto out2;
2066
2067 /* a misnomer, actually - it's allocate and reserve parport number */
2068 p = parport_register_port(base, irq, dma, ops);
2069 if (!p)
2070 goto out3;
2071
2072 base_res = request_region(base, 3, p->name);
2073 if (!base_res)
2074 goto out4;
2075
2076 memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
2077 priv->ctr = 0xc;
2078 priv->ctr_writable = ~0x10;
2079 priv->ecr = 0;
2080 priv->ecr_writable = ecr_writable;
2081 priv->fifo_depth = 0;
2082 priv->dma_buf = NULL;
2083 priv->dma_handle = 0;
2084 INIT_LIST_HEAD(&priv->list);
2085 priv->port = p;
2086
2087 p->dev = dev;
2088 p->base_hi = base_hi;
2089 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2090 p->private_data = priv;
2091
2092 if (base_hi) {
2093 ECR_res = request_region(base_hi, 3, p->name);
2094 if (ECR_res)
2095 parport_ECR_present(p);
2096 }
2097
2098 if (base != 0x3bc) {
2099 EPP_res = request_region(base+0x3, 5, p->name);
2100 if (EPP_res)
2101 if (!parport_EPP_supported(p))
2102 parport_ECPEPP_supported(p);
2103 }
2104 if (!parport_SPP_supported(p))
2105 /* No port. */
2106 goto out5;
2107 if (priv->ecr)
2108 parport_ECPPS2_supported(p);
2109 else
2110 parport_PS2_supported(p);
2111
2112 p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
2113
2114 pr_info("%s: PC-style at 0x%lx", p->name, p->base);
2115 if (p->base_hi && priv->ecr)
2116 pr_cont(" (0x%lx)", p->base_hi);
2117 if (p->irq == PARPORT_IRQ_AUTO) {
2118 p->irq = PARPORT_IRQ_NONE;
2119 parport_irq_probe(p);
2120 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2121 p->irq = PARPORT_IRQ_NONE;
2122 parport_irq_probe(p);
2123 probedirq = p->irq;
2124 p->irq = PARPORT_IRQ_NONE;
2125 }
2126 if (p->irq != PARPORT_IRQ_NONE) {
2127 pr_cont(", irq %d", p->irq);
2128 priv->ctr_writable |= 0x10;
2129
2130 if (p->dma == PARPORT_DMA_AUTO) {
2131 p->dma = PARPORT_DMA_NONE;
2132 parport_dma_probe(p);
2133 }
2134 }
2135 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2136 is mandatory (see above) */
2137 p->dma = PARPORT_DMA_NONE;
2138
2139#ifdef CONFIG_PARPORT_PC_FIFO
2140 if (parport_ECP_supported(p) &&
2141 p->dma != PARPORT_DMA_NOFIFO &&
2142 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2143 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2144 if (p->dma != PARPORT_DMA_NONE)
2145 p->modes |= PARPORT_MODE_DMA;
2146 } else
2147 /* We can't use the DMA channel after all. */
2148 p->dma = PARPORT_DMA_NONE;
2149#endif /* Allowed to use FIFO/DMA */
2150
2151 p->modes &= ~mode_mask;
2152
2153#ifdef CONFIG_PARPORT_PC_FIFO
2154 if ((p->modes & PARPORT_MODE_COMPAT) != 0)
2155 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2156#ifdef CONFIG_PARPORT_1284
2157 if ((p->modes & PARPORT_MODE_ECP) != 0)
2158 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2159#endif
2160 if ((p->modes & (PARPORT_MODE_ECP | PARPORT_MODE_COMPAT)) != 0) {
2161 if ((p->modes & PARPORT_MODE_DMA) != 0)
2162 pr_cont(", dma %d", p->dma);
2163 else
2164 pr_cont(", using FIFO");
2165 }
2166#endif /* Allowed to use FIFO/DMA */
2167
2168 pr_cont(" [");
2169
2170#define printmode(x) \
2171do { \
2172 if (p->modes & PARPORT_MODE_##x) \
2173 pr_cont("%s%s", f++ ? "," : "", #x); \
2174} while (0)
2175
2176 {
2177 int f = 0;
2178 printmode(PCSPP);
2179 printmode(TRISTATE);
2180 printmode(COMPAT);
2181 printmode(EPP);
2182 printmode(ECP);
2183 printmode(DMA);
2184 }
2185#undef printmode
2186#ifndef CONFIG_PARPORT_1284
2187 pr_cont("(,...)");
2188#endif /* CONFIG_PARPORT_1284 */
2189 pr_cont("]\n");
2190 if (probedirq != PARPORT_IRQ_NONE)
2191 pr_info("%s: irq %d detected\n", p->name, probedirq);
2192
2193 /* If No ECP release the ports grabbed above. */
2194 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2195 release_region(base_hi, 3);
2196 ECR_res = NULL;
2197 }
2198 /* Likewise for EEP ports */
2199 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2200 release_region(base+3, 5);
2201 EPP_res = NULL;
2202 }
2203 if (p->irq != PARPORT_IRQ_NONE) {
2204 if (request_irq(p->irq, parport_irq_handler,
2205 irqflags, p->name, p)) {
2206 pr_warn("%s: irq %d in use, resorting to polled operation\n",
2207 p->name, p->irq);
2208 p->irq = PARPORT_IRQ_NONE;
2209 p->dma = PARPORT_DMA_NONE;
2210 }
2211
2212#ifdef CONFIG_PARPORT_PC_FIFO
2213#ifdef HAS_DMA
2214 if (p->dma != PARPORT_DMA_NONE) {
2215 if (request_dma(p->dma, p->name)) {
2216 pr_warn("%s: dma %d in use, resorting to PIO operation\n",
2217 p->name, p->dma);
2218 p->dma = PARPORT_DMA_NONE;
2219 } else {
2220 priv->dma_buf =
2221 dma_alloc_coherent(dev,
2222 PAGE_SIZE,
2223 &priv->dma_handle,
2224 GFP_KERNEL);
2225 if (!priv->dma_buf) {
2226 pr_warn("%s: cannot get buffer for DMA, resorting to PIO operation\n",
2227 p->name);
2228 free_dma(p->dma);
2229 p->dma = PARPORT_DMA_NONE;
2230 }
2231 }
2232 }
2233#endif
2234#endif
2235 }
2236
2237 /* Done probing. Now put the port into a sensible start-up state. */
2238 if (priv->ecr)
2239 /*
2240 * Put the ECP detected port in PS2 mode.
2241 * Do this also for ports that have ECR but don't do ECP.
2242 */
2243 ECR_WRITE(p, 0x34);
2244
2245 parport_pc_write_data(p, 0);
2246 parport_pc_data_forward(p);
2247
2248 /* Now that we've told the sharing engine about the port, and
2249 found out its characteristics, let the high-level drivers
2250 know about it. */
2251 spin_lock(&ports_lock);
2252 list_add(&priv->list, &ports_list);
2253 spin_unlock(&ports_lock);
2254 parport_announce_port(p);
2255
2256 return p;
2257
2258out5:
2259 if (ECR_res)
2260 release_region(base_hi, 3);
2261 if (EPP_res)
2262 release_region(base+0x3, 5);
2263 release_region(base, 3);
2264out4:
2265 parport_del_port(p);
2266out3:
2267 kfree(priv);
2268out2:
2269 kfree(ops);
2270out1:
2271 if (pdev)
2272 platform_device_unregister(pdev);
2273 return NULL;
2274}
2275
2276struct parport *parport_pc_probe_port(unsigned long int base,
2277 unsigned long int base_hi,
2278 int irq, int dma,
2279 struct device *dev,
2280 int irqflags)
2281{
2282 return __parport_pc_probe_port(base, base_hi, irq, dma,
2283 dev, irqflags, 0, 0);
2284}
2285EXPORT_SYMBOL(parport_pc_probe_port);
2286
2287void parport_pc_unregister_port(struct parport *p)
2288{
2289 struct parport_pc_private *priv = p->private_data;
2290 struct parport_operations *ops = p->ops;
2291
2292 parport_remove_port(p);
2293 spin_lock(&ports_lock);
2294 list_del_init(&priv->list);
2295 spin_unlock(&ports_lock);
2296#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2297 if (p->dma != PARPORT_DMA_NONE)
2298 free_dma(p->dma);
2299#endif
2300 if (p->irq != PARPORT_IRQ_NONE)
2301 free_irq(p->irq, p);
2302 release_region(p->base, 3);
2303 if (p->size > 3)
2304 release_region(p->base + 3, p->size - 3);
2305 if (p->modes & PARPORT_MODE_ECP)
2306 release_region(p->base_hi, 3);
2307#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2308 if (priv->dma_buf)
2309 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2310 priv->dma_buf,
2311 priv->dma_handle);
2312#endif
2313 kfree(p->private_data);
2314 parport_del_port(p);
2315 kfree(ops); /* hope no-one cached it */
2316}
2317EXPORT_SYMBOL(parport_pc_unregister_port);
2318
2319#ifdef CONFIG_PCI
2320
2321/* ITE support maintained by Rich Liu <richliu@poorman.org> */
2322static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
2323 const struct parport_pc_via_data *via)
2324{
2325 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2326 u32 ite8872set;
2327 u32 ite8872_lpt, ite8872_lpthi;
2328 u8 ite8872_irq, type;
2329 int irq;
2330 int i;
2331
2332 pr_debug("sio_ite_8872_probe()\n");
2333
2334 /* make sure which one chip */
2335 for (i = 0; i < 5; i++) {
2336 if (request_region(inta_addr[i], 32, "it887x")) {
2337 int test;
2338 pci_write_config_dword(pdev, 0x60,
2339 0xe5000000 | inta_addr[i]);
2340 pci_write_config_dword(pdev, 0x78,
2341 0x00000000 | inta_addr[i]);
2342 test = inb(inta_addr[i]);
2343 if (test != 0xff)
2344 break;
2345 release_region(inta_addr[i], 32);
2346 }
2347 }
2348 if (i >= 5) {
2349 pr_info("parport_pc: cannot find ITE8872 INTA\n");
2350 return 0;
2351 }
2352
2353 type = inb(inta_addr[i] + 0x18);
2354 type &= 0x0f;
2355
2356 switch (type) {
2357 case 0x2:
2358 pr_info("parport_pc: ITE8871 found (1P)\n");
2359 ite8872set = 0x64200000;
2360 break;
2361 case 0xa:
2362 pr_info("parport_pc: ITE8875 found (1P)\n");
2363 ite8872set = 0x64200000;
2364 break;
2365 case 0xe:
2366 pr_info("parport_pc: ITE8872 found (2S1P)\n");
2367 ite8872set = 0x64e00000;
2368 break;
2369 case 0x6:
2370 pr_info("parport_pc: ITE8873 found (1S)\n");
2371 release_region(inta_addr[i], 32);
2372 return 0;
2373 case 0x8:
2374 pr_info("parport_pc: ITE8874 found (2S)\n");
2375 release_region(inta_addr[i], 32);
2376 return 0;
2377 default:
2378 pr_info("parport_pc: unknown ITE887x\n");
2379 pr_info("parport_pc: please mail 'lspci -nvv' output to Rich.Liu@ite.com.tw\n");
2380 release_region(inta_addr[i], 32);
2381 return 0;
2382 }
2383
2384 pci_read_config_byte(pdev, 0x3c, &ite8872_irq);
2385 pci_read_config_dword(pdev, 0x1c, &ite8872_lpt);
2386 ite8872_lpt &= 0x0000ff00;
2387 pci_read_config_dword(pdev, 0x20, &ite8872_lpthi);
2388 ite8872_lpthi &= 0x0000ff00;
2389 pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2390 pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2391 pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2392 /* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */
2393 /* SET Parallel IRQ */
2394 pci_write_config_dword(pdev, 0x9c,
2395 ite8872set | (ite8872_irq * 0x11111));
2396
2397 pr_debug("ITE887x: The IRQ is %d\n", ite8872_irq);
2398 pr_debug("ITE887x: The PARALLEL I/O port is 0x%x\n", ite8872_lpt);
2399 pr_debug("ITE887x: The PARALLEL I/O porthi is 0x%x\n", ite8872_lpthi);
2400
2401 /* Let the user (or defaults) steer us away from interrupts */
2402 irq = ite8872_irq;
2403 if (autoirq != PARPORT_IRQ_AUTO)
2404 irq = PARPORT_IRQ_NONE;
2405
2406 /*
2407 * Release the resource so that parport_pc_probe_port can get it.
2408 */
2409 release_region(inta_addr[i], 32);
2410 if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi,
2411 irq, PARPORT_DMA_NONE, &pdev->dev, 0)) {
2412 pr_info("parport_pc: ITE 8872 parallel port: io=0x%X",
2413 ite8872_lpt);
2414 if (irq != PARPORT_IRQ_NONE)
2415 pr_cont(", irq=%d", irq);
2416 pr_cont("\n");
2417 return 1;
2418 }
2419
2420 return 0;
2421}
2422
2423/* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2424 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2425static int parport_init_mode;
2426
2427/* Data for two known VIA chips */
2428static struct parport_pc_via_data via_686a_data = {
2429 0x51,
2430 0x50,
2431 0x85,
2432 0x02,
2433 0xE2,
2434 0xF0,
2435 0xE6
2436};
2437static struct parport_pc_via_data via_8231_data = {
2438 0x45,
2439 0x44,
2440 0x50,
2441 0x04,
2442 0xF2,
2443 0xFA,
2444 0xF6
2445};
2446
2447static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma,
2448 const struct parport_pc_via_data *via)
2449{
2450 u8 tmp, tmp2, siofunc;
2451 u8 ppcontrol = 0;
2452 int dma, irq;
2453 unsigned port1, port2;
2454 unsigned have_epp = 0;
2455
2456 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2457
2458 switch (parport_init_mode) {
2459 case 1:
2460 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2461 siofunc = VIA_FUNCTION_PARPORT_SPP;
2462 break;
2463 case 2:
2464 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2465 siofunc = VIA_FUNCTION_PARPORT_SPP;
2466 ppcontrol = VIA_PARPORT_BIDIR;
2467 break;
2468 case 3:
2469 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2470 siofunc = VIA_FUNCTION_PARPORT_EPP;
2471 ppcontrol = VIA_PARPORT_BIDIR;
2472 have_epp = 1;
2473 break;
2474 case 4:
2475 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2476 siofunc = VIA_FUNCTION_PARPORT_ECP;
2477 ppcontrol = VIA_PARPORT_BIDIR;
2478 break;
2479 case 5:
2480 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2481 siofunc = VIA_FUNCTION_PARPORT_ECP;
2482 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2483 have_epp = 1;
2484 break;
2485 default:
2486 printk(KERN_DEBUG "parport_pc: probing current configuration\n");
2487 siofunc = VIA_FUNCTION_PROBE;
2488 break;
2489 }
2490 /*
2491 * unlock super i/o configuration
2492 */
2493 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2494 tmp |= via->via_pci_superio_config_data;
2495 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2496
2497 /* Bits 1-0: Parallel Port Mode / Enable */
2498 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2499 tmp = inb(VIA_CONFIG_DATA);
2500 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2501 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2502 tmp2 = inb(VIA_CONFIG_DATA);
2503 if (siofunc == VIA_FUNCTION_PROBE) {
2504 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2505 ppcontrol = tmp2;
2506 } else {
2507 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2508 tmp |= siofunc;
2509 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2510 outb(tmp, VIA_CONFIG_DATA);
2511 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2512 tmp2 |= ppcontrol;
2513 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2514 outb(tmp2, VIA_CONFIG_DATA);
2515 }
2516
2517 /* Parallel Port I/O Base Address, bits 9-2 */
2518 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2519 port1 = inb(VIA_CONFIG_DATA) << 2;
2520
2521 printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
2522 port1);
2523 if (port1 == 0x3BC && have_epp) {
2524 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2525 outb((0x378 >> 2), VIA_CONFIG_DATA);
2526 printk(KERN_DEBUG "parport_pc: Parallel port base changed to 0x378\n");
2527 port1 = 0x378;
2528 }
2529
2530 /*
2531 * lock super i/o configuration
2532 */
2533 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2534 tmp &= ~via->via_pci_superio_config_data;
2535 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2536
2537 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2538 pr_info("parport_pc: VIA parallel port disabled in BIOS\n");
2539 return 0;
2540 }
2541
2542 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2543 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2544 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2545
2546 if (siofunc == VIA_FUNCTION_PARPORT_ECP) {
2547 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2548 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2549 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2550 } else
2551 /* if ECP not enabled, DMA is not enabled, assumed
2552 bogus 'dma' value */
2553 dma = PARPORT_DMA_NONE;
2554
2555 /* Let the user (or defaults) steer us away from interrupts and DMA */
2556 if (autoirq == PARPORT_IRQ_NONE) {
2557 irq = PARPORT_IRQ_NONE;
2558 dma = PARPORT_DMA_NONE;
2559 }
2560 if (autodma == PARPORT_DMA_NONE)
2561 dma = PARPORT_DMA_NONE;
2562
2563 switch (port1) {
2564 case 0x3bc:
2565 port2 = 0x7bc; break;
2566 case 0x378:
2567 port2 = 0x778; break;
2568 case 0x278:
2569 port2 = 0x678; break;
2570 default:
2571 pr_info("parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2572 port1);
2573 return 0;
2574 }
2575
2576 /* filter bogus IRQs */
2577 switch (irq) {
2578 case 0:
2579 case 2:
2580 case 8:
2581 case 13:
2582 irq = PARPORT_IRQ_NONE;
2583 break;
2584
2585 default: /* do nothing */
2586 break;
2587 }
2588
2589 /* finally, do the probe with values obtained */
2590 if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) {
2591 pr_info("parport_pc: VIA parallel port: io=0x%X", port1);
2592 if (irq != PARPORT_IRQ_NONE)
2593 pr_cont(", irq=%d", irq);
2594 if (dma != PARPORT_DMA_NONE)
2595 pr_cont(", dma=%d", dma);
2596 pr_cont("\n");
2597 return 1;
2598 }
2599
2600 pr_warn("parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2601 port1, irq, dma);
2602 return 0;
2603}
2604
2605
2606enum parport_pc_sio_types {
2607 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2608 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2609 sio_ite_8872,
2610 last_sio
2611};
2612
2613/* each element directly indexed from enum list, above */
2614static struct parport_pc_superio {
2615 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2616 const struct parport_pc_via_data *via);
2617 const struct parport_pc_via_data *via;
2618} parport_pc_superio_info[] = {
2619 { sio_via_probe, &via_686a_data, },
2620 { sio_via_probe, &via_8231_data, },
2621 { sio_ite_8872_probe, NULL, },
2622};
2623
2624enum parport_pc_pci_cards {
2625 siig_1p_10x = last_sio,
2626 siig_2p_10x,
2627 siig_1p_20x,
2628 siig_2p_20x,
2629 lava_parallel,
2630 lava_parallel_dual_a,
2631 lava_parallel_dual_b,
2632 boca_ioppar,
2633 plx_9050,
2634 timedia_4006a,
2635 timedia_4014,
2636 timedia_4008a,
2637 timedia_4018,
2638 timedia_9018a,
2639 syba_2p_epp,
2640 syba_1p_ecp,
2641 titan_010l,
2642 avlab_1p,
2643 avlab_2p,
2644 oxsemi_952,
2645 oxsemi_954,
2646 oxsemi_840,
2647 oxsemi_pcie_pport,
2648 aks_0100,
2649 mobility_pp,
2650 netmos_9900,
2651 netmos_9705,
2652 netmos_9715,
2653 netmos_9755,
2654 netmos_9805,
2655 netmos_9815,
2656 netmos_9901,
2657 netmos_9865,
2658 asix_ax99100,
2659 quatech_sppxp100,
2660 wch_ch382l,
2661 brainboxes_uc146,
2662 brainboxes_px203,
2663};
2664
2665
2666/* each element directly indexed from enum list, above
2667 * (but offset by last_sio) */
2668static struct parport_pc_pci {
2669 int numports;
2670 struct { /* BAR (base address registers) numbers in the config
2671 space header */
2672 int lo;
2673 int hi;
2674 /* -1 if not there, >6 for offset-method (max BAR is 6) */
2675 } addr[2];
2676
2677 /* Bit field of parport modes to exclude. */
2678 unsigned int mode_mask;
2679
2680 /* If non-zero, sets the bitmask of writable ECR bits. In that
2681 * case additionally bit 0 will be forcibly set on writes. */
2682 unsigned char ecr_writable;
2683
2684 /* If set, this is called immediately after pci_enable_device.
2685 * If it returns non-zero, no probing will take place and the
2686 * ports will not be used. */
2687 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2688
2689 /* If set, this is called after probing for ports. If 'failed'
2690 * is non-zero we couldn't use any of the ports. */
2691 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2692} cards[] = {
2693 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2694 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2695 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2696 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2697 /* lava_parallel */ { 1, { { 0, -1 }, } },
2698 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2699 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2700 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2701 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2702 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2703 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2704 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2705 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2706 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2707 /* SYBA uses fixed offsets in
2708 a 1K io window */
2709 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2710 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2711 /* titan_010l */ { 1, { { 3, -1 }, } },
2712 /* avlab_1p */ { 1, { { 0, 1}, } },
2713 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2714 /* The Oxford Semi cards are unusual: older variants of 954 don't
2715 * support ECP, and 840 locks up if you write 1 to bit 2! None
2716 * implement nFault or service interrupts and all require 00001
2717 * bit pattern to be used for bits 4:0 with ECR writes. */
2718 /* oxsemi_952 */ { 1, { { 0, 1 }, },
2719 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2720 /* oxsemi_954 */ { 1, { { 0, 1 }, },
2721 PARPORT_MODE_ECP |
2722 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2723 /* oxsemi_840 */ { 1, { { 0, 1 }, },
2724 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2725 /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, },
2726 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2727 /* aks_0100 */ { 1, { { 0, -1 }, } },
2728 /* mobility_pp */ { 1, { { 0, 1 }, } },
2729 /* netmos_9900 */ { 1, { { 0, -1 }, } },
2730
2731 /* The netmos entries below are untested */
2732 /* netmos_9705 */ { 1, { { 0, -1 }, } },
2733 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
2734 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
2735 /* netmos_9805 */ { 1, { { 0, 1 }, } },
2736 /* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2737 /* netmos_9901 */ { 1, { { 0, -1 }, } },
2738 /* netmos_9865 */ { 1, { { 0, -1 }, } },
2739 /* asix_ax99100 */ { 1, { { 0, 1 }, } },
2740 /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
2741 /* wch_ch382l */ { 1, { { 2, -1 }, } },
2742 /* brainboxes_uc146 */ { 1, { { 3, -1 }, } },
2743 /* brainboxes_px203 */ { 1, { { 0, -1 }, } },
2744};
2745
2746static const struct pci_device_id parport_pc_pci_tbl[] = {
2747 /* Super-IO onboard chips */
2748 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2749 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2750 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2751 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2752
2753 /* PCI cards */
2754 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2755 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2756 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2757 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2758 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2759 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2760 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2761 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2762 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2763 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2764 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2765 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2766 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2767 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2768 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2769 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2770 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2771 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
2772 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2773 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2774 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2775 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2776 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2777 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2778 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2779 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2780 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2781 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2782 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2783 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2784 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2785 /* AFAVLAB_TK9902 */
2786 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
2787 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2788 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2789 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2790 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2791 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2792 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2793 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2794 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
2795 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2796 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
2797 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2798 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
2799 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2800 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
2801 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2802 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
2803 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2804 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
2805 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2806 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
2807 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2808 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
2809 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2810 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2811 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2812 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2813 /* NetMos communication controllers */
2814 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900,
2815 0xA000, 0x2000, 0, 0, netmos_9900 },
2816 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2817 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2818 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2819 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2820 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2821 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2822 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2823 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2824 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2825 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2826 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
2827 0xA000, 0x2000, 0, 0, netmos_9901 },
2828 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2829 0xA000, 0x1000, 0, 0, netmos_9865 },
2830 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2831 0xA000, 0x2000, 0, 0, netmos_9865 },
2832 /* ASIX AX99100 PCIe to Multi I/O Controller */
2833 { PCI_VENDOR_ID_ASIX, PCI_DEVICE_ID_ASIX_AX99100,
2834 0xA000, 0x2000, 0, 0, asix_ax99100 },
2835 /* Quatech SPPXP-100 Parallel port PCI ExpressCard */
2836 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
2837 PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
2838 /* WCH CH382L PCI-E single parallel port card */
2839 { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l },
2840 /* Brainboxes IX-500/550 */
2841 { PCI_VENDOR_ID_INTASHIELD, 0x402a,
2842 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2843 /* Brainboxes UC-146/UC-157 */
2844 { PCI_VENDOR_ID_INTASHIELD, 0x0be1,
2845 PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_uc146 },
2846 { PCI_VENDOR_ID_INTASHIELD, 0x0be2,
2847 PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_uc146 },
2848 /* Brainboxes PX-146/PX-257 */
2849 { PCI_VENDOR_ID_INTASHIELD, 0x401c,
2850 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2851 /* Brainboxes PX-203 */
2852 { PCI_VENDOR_ID_INTASHIELD, 0x4007,
2853 PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_px203 },
2854 /* Brainboxes PX-475 */
2855 { PCI_VENDOR_ID_INTASHIELD, 0x401f,
2856 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2857 { 0, } /* terminate list */
2858};
2859MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
2860
2861struct pci_parport_data {
2862 int num;
2863 struct parport *ports[2];
2864};
2865
2866static int parport_pc_pci_probe(struct pci_dev *dev,
2867 const struct pci_device_id *id)
2868{
2869 int err, count, n, i = id->driver_data;
2870 struct pci_parport_data *data;
2871
2872 if (i < last_sio)
2873 /* This is an onboard Super-IO and has already been probed */
2874 return 0;
2875
2876 /* This is a PCI card */
2877 i -= last_sio;
2878 count = 0;
2879 err = pci_enable_device(dev);
2880 if (err)
2881 return err;
2882
2883 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2884 if (!data)
2885 return -ENOMEM;
2886
2887 if (cards[i].preinit_hook &&
2888 cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2889 kfree(data);
2890 return -ENODEV;
2891 }
2892
2893 for (n = 0; n < cards[i].numports; n++) {
2894 int lo = cards[i].addr[n].lo;
2895 int hi = cards[i].addr[n].hi;
2896 int irq;
2897 unsigned long io_lo, io_hi;
2898 io_lo = pci_resource_start(dev, lo);
2899 io_hi = 0;
2900 if ((hi >= 0) && (hi <= 6))
2901 io_hi = pci_resource_start(dev, hi);
2902 else if (hi > 6)
2903 io_lo += hi; /* Reinterpret the meaning of
2904 "hi" as an offset (see SYBA
2905 def.) */
2906 /* TODO: test if sharing interrupts works */
2907 irq = dev->irq;
2908 if (irq == IRQ_NONE) {
2909 printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
2910 id->vendor, id->device, io_lo, io_hi);
2911 irq = PARPORT_IRQ_NONE;
2912 } else {
2913 printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
2914 id->vendor, id->device, io_lo, io_hi, irq);
2915 }
2916 data->ports[count] =
2917 __parport_pc_probe_port(io_lo, io_hi, irq,
2918 PARPORT_DMA_NONE, &dev->dev,
2919 IRQF_SHARED,
2920 cards[i].mode_mask,
2921 cards[i].ecr_writable);
2922 if (data->ports[count])
2923 count++;
2924 }
2925
2926 data->num = count;
2927
2928 if (cards[i].postinit_hook)
2929 cards[i].postinit_hook(dev, count == 0);
2930
2931 if (count) {
2932 pci_set_drvdata(dev, data);
2933 return 0;
2934 }
2935
2936 kfree(data);
2937
2938 return -ENODEV;
2939}
2940
2941static void parport_pc_pci_remove(struct pci_dev *dev)
2942{
2943 struct pci_parport_data *data = pci_get_drvdata(dev);
2944 int i;
2945
2946 if (data) {
2947 for (i = data->num - 1; i >= 0; i--)
2948 parport_pc_unregister_port(data->ports[i]);
2949
2950 kfree(data);
2951 }
2952}
2953
2954static struct pci_driver parport_pc_pci_driver = {
2955 .name = "parport_pc",
2956 .id_table = parport_pc_pci_tbl,
2957 .probe = parport_pc_pci_probe,
2958 .remove = parport_pc_pci_remove,
2959};
2960
2961static int __init parport_pc_init_superio(int autoirq, int autodma)
2962{
2963 const struct pci_device_id *id;
2964 struct pci_dev *pdev = NULL;
2965 int ret = 0;
2966
2967 for_each_pci_dev(pdev) {
2968 id = pci_match_id(parport_pc_pci_tbl, pdev);
2969 if (id == NULL || id->driver_data >= last_sio)
2970 continue;
2971
2972 if (parport_pc_superio_info[id->driver_data].probe(
2973 pdev, autoirq, autodma,
2974 parport_pc_superio_info[id->driver_data].via)) {
2975 ret++;
2976 }
2977 }
2978
2979 return ret; /* number of devices found */
2980}
2981#else
2982static struct pci_driver parport_pc_pci_driver;
2983static int __init parport_pc_init_superio(int autoirq, int autodma)
2984{
2985 return 0;
2986}
2987#endif /* CONFIG_PCI */
2988
2989#ifdef CONFIG_PNP
2990
2991static const struct pnp_device_id parport_pc_pnp_tbl[] = {
2992 /* Standard LPT Printer Port */
2993 {.id = "PNP0400", .driver_data = 0},
2994 /* ECP Printer Port */
2995 {.id = "PNP0401", .driver_data = 0},
2996 { }
2997};
2998
2999MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
3000
3001static int parport_pc_pnp_probe(struct pnp_dev *dev,
3002 const struct pnp_device_id *id)
3003{
3004 struct parport *pdata;
3005 unsigned long io_lo, io_hi;
3006 int dma, irq;
3007
3008 if (pnp_port_valid(dev, 0) &&
3009 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
3010 io_lo = pnp_port_start(dev, 0);
3011 } else
3012 return -EINVAL;
3013
3014 if (pnp_port_valid(dev, 1) &&
3015 !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
3016 io_hi = pnp_port_start(dev, 1);
3017 } else
3018 io_hi = 0;
3019
3020 if (pnp_irq_valid(dev, 0) &&
3021 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
3022 irq = pnp_irq(dev, 0);
3023 } else
3024 irq = PARPORT_IRQ_NONE;
3025
3026 if (pnp_dma_valid(dev, 0) &&
3027 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
3028 dma = pnp_dma(dev, 0);
3029 } else
3030 dma = PARPORT_DMA_NONE;
3031
3032 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
3033 pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
3034 if (pdata == NULL)
3035 return -ENODEV;
3036
3037 pnp_set_drvdata(dev, pdata);
3038 return 0;
3039}
3040
3041static void parport_pc_pnp_remove(struct pnp_dev *dev)
3042{
3043 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3044 if (!pdata)
3045 return;
3046
3047 parport_pc_unregister_port(pdata);
3048}
3049
3050/* we only need the pnp layer to activate the device, at least for now */
3051static struct pnp_driver parport_pc_pnp_driver = {
3052 .name = "parport_pc",
3053 .id_table = parport_pc_pnp_tbl,
3054 .probe = parport_pc_pnp_probe,
3055 .remove = parport_pc_pnp_remove,
3056};
3057
3058#else
3059static struct pnp_driver parport_pc_pnp_driver;
3060#endif /* CONFIG_PNP */
3061
3062static int parport_pc_platform_probe(struct platform_device *pdev)
3063{
3064 /* Always succeed, the actual probing is done in
3065 * parport_pc_probe_port(). */
3066 return 0;
3067}
3068
3069static struct platform_driver parport_pc_platform_driver = {
3070 .driver = {
3071 .name = "parport_pc",
3072 },
3073 .probe = parport_pc_platform_probe,
3074};
3075
3076/* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3077static int __attribute__((unused))
3078parport_pc_find_isa_ports(int autoirq, int autodma)
3079{
3080 int count = 0;
3081
3082 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
3083 count++;
3084 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
3085 count++;
3086 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
3087 count++;
3088
3089 return count;
3090}
3091
3092/* This function is called by parport_pc_init if the user didn't
3093 * specify any ports to probe. Its job is to find some ports. Order
3094 * is important here -- we want ISA ports to be registered first,
3095 * followed by PCI cards (for least surprise), but before that we want
3096 * to do chipset-specific tests for some onboard ports that we know
3097 * about.
3098 *
3099 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3100 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3101 */
3102static void __init parport_pc_find_ports(int autoirq, int autodma)
3103{
3104 int count = 0, err;
3105
3106#ifdef CONFIG_PARPORT_PC_SUPERIO
3107 detect_and_report_it87();
3108 detect_and_report_winbond();
3109 detect_and_report_smsc();
3110#endif
3111
3112 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3113 count += parport_pc_init_superio(autoirq, autodma);
3114
3115 /* PnP ports, skip detection if SuperIO already found them */
3116 if (!count) {
3117 err = pnp_register_driver(&parport_pc_pnp_driver);
3118 if (!err)
3119 pnp_registered_parport = 1;
3120 }
3121
3122 /* ISA ports and whatever (see asm/parport.h). */
3123 parport_pc_find_nonpci_ports(autoirq, autodma);
3124
3125 err = pci_register_driver(&parport_pc_pci_driver);
3126 if (!err)
3127 pci_registered_parport = 1;
3128}
3129
3130/*
3131 * Piles of crap below pretend to be a parser for module and kernel
3132 * parameters. Say "thank you" to whoever had come up with that
3133 * syntax and keep in mind that code below is a cleaned up version.
3134 */
3135
3136static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
3137 [0 ... PARPORT_PC_MAX_PORTS] = 0
3138};
3139static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
3140 [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
3141};
3142static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
3143 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
3144};
3145static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
3146 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
3147};
3148
3149static int __init parport_parse_param(const char *s, int *val,
3150 int automatic, int none, int nofifo)
3151{
3152 if (!s)
3153 return 0;
3154 if (!strncmp(s, "auto", 4))
3155 *val = automatic;
3156 else if (!strncmp(s, "none", 4))
3157 *val = none;
3158 else if (nofifo && !strncmp(s, "nofifo", 6))
3159 *val = nofifo;
3160 else {
3161 char *ep;
3162 unsigned long r = simple_strtoul(s, &ep, 0);
3163 if (ep != s)
3164 *val = r;
3165 else {
3166 pr_err("parport: bad specifier `%s'\n", s);
3167 return -1;
3168 }
3169 }
3170 return 0;
3171}
3172
3173static int __init parport_parse_irq(const char *irqstr, int *val)
3174{
3175 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3176 PARPORT_IRQ_NONE, 0);
3177}
3178
3179static int __init parport_parse_dma(const char *dmastr, int *val)
3180{
3181 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3182 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3183}
3184
3185#ifdef CONFIG_PCI
3186static int __init parport_init_mode_setup(char *str)
3187{
3188 printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n",
3189 str);
3190
3191 if (!strcmp(str, "spp"))
3192 parport_init_mode = 1;
3193 if (!strcmp(str, "ps2"))
3194 parport_init_mode = 2;
3195 if (!strcmp(str, "epp"))
3196 parport_init_mode = 3;
3197 if (!strcmp(str, "ecp"))
3198 parport_init_mode = 4;
3199 if (!strcmp(str, "ecpepp"))
3200 parport_init_mode = 5;
3201 return 1;
3202}
3203#endif
3204
3205#ifdef MODULE
3206static char *irq[PARPORT_PC_MAX_PORTS];
3207static char *dma[PARPORT_PC_MAX_PORTS];
3208
3209MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3210module_param_hw_array(io, int, ioport, NULL, 0);
3211MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3212module_param_hw_array(io_hi, int, ioport, NULL, 0);
3213MODULE_PARM_DESC(irq, "IRQ line");
3214module_param_hw_array(irq, charp, irq, NULL, 0);
3215MODULE_PARM_DESC(dma, "DMA channel");
3216module_param_hw_array(dma, charp, dma, NULL, 0);
3217#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3218 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3219MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3220module_param(verbose_probing, int, 0644);
3221#endif
3222#ifdef CONFIG_PCI
3223static char *init_mode;
3224MODULE_PARM_DESC(init_mode,
3225 "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3226module_param(init_mode, charp, 0);
3227#endif
3228
3229static int __init parse_parport_params(void)
3230{
3231 unsigned int i;
3232 int val;
3233
3234#ifdef CONFIG_PCI
3235 if (init_mode)
3236 parport_init_mode_setup(init_mode);
3237#endif
3238
3239 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3240 if (parport_parse_irq(irq[i], &val))
3241 return 1;
3242 irqval[i] = val;
3243 if (parport_parse_dma(dma[i], &val))
3244 return 1;
3245 dmaval[i] = val;
3246 }
3247 if (!io[0]) {
3248 /* The user can make us use any IRQs or DMAs we find. */
3249 if (irq[0] && !parport_parse_irq(irq[0], &val))
3250 switch (val) {
3251 case PARPORT_IRQ_NONE:
3252 case PARPORT_IRQ_AUTO:
3253 irqval[0] = val;
3254 break;
3255 default:
3256 pr_warn("parport_pc: irq specified without base address. Use 'io=' to specify one\n");
3257 }
3258
3259 if (dma[0] && !parport_parse_dma(dma[0], &val))
3260 switch (val) {
3261 case PARPORT_DMA_NONE:
3262 case PARPORT_DMA_AUTO:
3263 dmaval[0] = val;
3264 break;
3265 default:
3266 pr_warn("parport_pc: dma specified without base address. Use 'io=' to specify one\n");
3267 }
3268 }
3269 return 0;
3270}
3271
3272#else
3273
3274static int parport_setup_ptr __initdata;
3275
3276/*
3277 * Acceptable parameters:
3278 *
3279 * parport=0
3280 * parport=auto
3281 * parport=0xBASE[,IRQ[,DMA]]
3282 *
3283 * IRQ/DMA may be numeric or 'auto' or 'none'
3284 */
3285static int __init parport_setup(char *str)
3286{
3287 char *endptr;
3288 char *sep;
3289 int val;
3290
3291 if (!str || !*str || (*str == '0' && !*(str+1))) {
3292 /* Disable parport if "parport=0" in cmdline */
3293 io[0] = PARPORT_DISABLE;
3294 return 1;
3295 }
3296
3297 if (!strncmp(str, "auto", 4)) {
3298 irqval[0] = PARPORT_IRQ_AUTO;
3299 dmaval[0] = PARPORT_DMA_AUTO;
3300 return 1;
3301 }
3302
3303 val = simple_strtoul(str, &endptr, 0);
3304 if (endptr == str) {
3305 pr_warn("parport=%s not understood\n", str);
3306 return 1;
3307 }
3308
3309 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3310 pr_err("parport=%s ignored, too many ports\n", str);
3311 return 1;
3312 }
3313
3314 io[parport_setup_ptr] = val;
3315 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3316 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3317
3318 sep = strchr(str, ',');
3319 if (sep++) {
3320 if (parport_parse_irq(sep, &val))
3321 return 1;
3322 irqval[parport_setup_ptr] = val;
3323 sep = strchr(sep, ',');
3324 if (sep++) {
3325 if (parport_parse_dma(sep, &val))
3326 return 1;
3327 dmaval[parport_setup_ptr] = val;
3328 }
3329 }
3330 parport_setup_ptr++;
3331 return 1;
3332}
3333
3334static int __init parse_parport_params(void)
3335{
3336 return io[0] == PARPORT_DISABLE;
3337}
3338
3339__setup("parport=", parport_setup);
3340
3341/*
3342 * Acceptable parameters:
3343 *
3344 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3345 */
3346#ifdef CONFIG_PCI
3347__setup("parport_init_mode=", parport_init_mode_setup);
3348#endif
3349#endif
3350
3351/* "Parser" ends here */
3352
3353static int __init parport_pc_init(void)
3354{
3355 int err;
3356
3357 if (parse_parport_params())
3358 return -EINVAL;
3359
3360 err = platform_driver_register(&parport_pc_platform_driver);
3361 if (err)
3362 return err;
3363
3364 if (io[0]) {
3365 int i;
3366 /* Only probe the ports we were given. */
3367 user_specified = 1;
3368 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3369 if (!io[i])
3370 break;
3371 if (io_hi[i] == PARPORT_IOHI_AUTO)
3372 io_hi[i] = 0x400 + io[i];
3373 parport_pc_probe_port(io[i], io_hi[i],
3374 irqval[i], dmaval[i], NULL, 0);
3375 }
3376 } else
3377 parport_pc_find_ports(irqval[0], dmaval[0]);
3378
3379 return 0;
3380}
3381
3382static void __exit parport_pc_exit(void)
3383{
3384 if (pci_registered_parport)
3385 pci_unregister_driver(&parport_pc_pci_driver);
3386 if (pnp_registered_parport)
3387 pnp_unregister_driver(&parport_pc_pnp_driver);
3388 platform_driver_unregister(&parport_pc_platform_driver);
3389
3390 while (!list_empty(&ports_list)) {
3391 struct parport_pc_private *priv;
3392 struct parport *port;
3393 struct device *dev;
3394 priv = list_entry(ports_list.next,
3395 struct parport_pc_private, list);
3396 port = priv->port;
3397 dev = port->dev;
3398 parport_pc_unregister_port(port);
3399 if (dev && dev->bus == &platform_bus_type)
3400 platform_device_unregister(to_platform_device(dev));
3401 }
3402}
3403
3404MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3405MODULE_DESCRIPTION("PC-style parallel port driver");
3406MODULE_LICENSE("GPL");
3407module_init(parport_pc_init)
3408module_exit(parport_pc_exit)
1// SPDX-License-Identifier: GPL-2.0-only
2/* Low-level parallel-port routines for 8255-based PC-style hardware.
3 *
4 * Authors: Phil Blundell <philb@gnu.org>
5 * Tim Waugh <tim@cyberelk.demon.co.uk>
6 * Jose Renau <renau@acm.org>
7 * David Campbell
8 * Andrea Arcangeli
9 *
10 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
11 *
12 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
13 * DMA support - Bert De Jonghe <bert@sophis.be>
14 * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
15 * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
16 * Various hacks, Fred Barnes, 04/2001
17 * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
18 */
19
20/* This driver should work with any hardware that is broadly compatible
21 * with that in the IBM PC. This applies to the majority of integrated
22 * I/O chipsets that are commonly available. The expected register
23 * layout is:
24 *
25 * base+0 data
26 * base+1 status
27 * base+2 control
28 *
29 * In addition, there are some optional registers:
30 *
31 * base+3 EPP address
32 * base+4 EPP data
33 * base+0x400 ECP config A
34 * base+0x401 ECP config B
35 * base+0x402 ECP control
36 *
37 * All registers are 8 bits wide and read/write. If your hardware differs
38 * only in register addresses (eg because your registers are on 32-bit
39 * word boundaries) then you can alter the constants in parport_pc.h to
40 * accommodate this.
41 *
42 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
43 * but rather will start at port->base_hi.
44 */
45
46#include <linux/module.h>
47#include <linux/init.h>
48#include <linux/sched/signal.h>
49#include <linux/delay.h>
50#include <linux/errno.h>
51#include <linux/interrupt.h>
52#include <linux/ioport.h>
53#include <linux/kernel.h>
54#include <linux/slab.h>
55#include <linux/dma-mapping.h>
56#include <linux/pci.h>
57#include <linux/pnp.h>
58#include <linux/platform_device.h>
59#include <linux/sysctl.h>
60#include <linux/io.h>
61#include <linux/uaccess.h>
62
63#include <asm/dma.h>
64
65#include <linux/parport.h>
66#include <linux/parport_pc.h>
67#include <linux/via.h>
68#include <asm/parport.h>
69
70#define PARPORT_PC_MAX_PORTS PARPORT_MAX
71
72#ifdef CONFIG_ISA_DMA_API
73#define HAS_DMA
74#endif
75
76/* ECR modes */
77#define ECR_SPP 00
78#define ECR_PS2 01
79#define ECR_PPF 02
80#define ECR_ECP 03
81#define ECR_EPP 04
82#define ECR_VND 05
83#define ECR_TST 06
84#define ECR_CNF 07
85#define ECR_MODE_MASK 0xe0
86#define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v))
87
88#undef DEBUG
89
90#ifdef DEBUG
91#define DPRINTK printk
92#else
93#define DPRINTK(stuff...)
94#endif
95
96
97#define NR_SUPERIOS 3
98static struct superio_struct { /* For Super-IO chips autodetection */
99 int io;
100 int irq;
101 int dma;
102} superios[NR_SUPERIOS] = { {0,},};
103
104static int user_specified;
105#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
106 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
107static int verbose_probing;
108#endif
109static int pci_registered_parport;
110static int pnp_registered_parport;
111
112/* frob_control, but for ECR */
113static void frob_econtrol(struct parport *pb, unsigned char m,
114 unsigned char v)
115{
116 unsigned char ectr = 0;
117
118 if (m != 0xff)
119 ectr = inb(ECONTROL(pb));
120
121 DPRINTK(KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n",
122 m, v, ectr, (ectr & ~m) ^ v);
123
124 outb((ectr & ~m) ^ v, ECONTROL(pb));
125}
126
127static inline void frob_set_mode(struct parport *p, int mode)
128{
129 frob_econtrol(p, ECR_MODE_MASK, mode << 5);
130}
131
132#ifdef CONFIG_PARPORT_PC_FIFO
133/* Safely change the mode bits in the ECR
134 Returns:
135 0 : Success
136 -EBUSY: Could not drain FIFO in some finite amount of time,
137 mode not changed!
138 */
139static int change_mode(struct parport *p, int m)
140{
141 const struct parport_pc_private *priv = p->physport->private_data;
142 unsigned char oecr;
143 int mode;
144
145 DPRINTK(KERN_INFO "parport change_mode ECP-ISA to mode 0x%02x\n", m);
146
147 if (!priv->ecr) {
148 printk(KERN_DEBUG "change_mode: but there's no ECR!\n");
149 return 0;
150 }
151
152 /* Bits <7:5> contain the mode. */
153 oecr = inb(ECONTROL(p));
154 mode = (oecr >> 5) & 0x7;
155 if (mode == m)
156 return 0;
157
158 if (mode >= 2 && !(priv->ctr & 0x20)) {
159 /* This mode resets the FIFO, so we may
160 * have to wait for it to drain first. */
161 unsigned long expire = jiffies + p->physport->cad->timeout;
162 int counter;
163 switch (mode) {
164 case ECR_PPF: /* Parallel Port FIFO mode */
165 case ECR_ECP: /* ECP Parallel Port mode */
166 /* Busy wait for 200us */
167 for (counter = 0; counter < 40; counter++) {
168 if (inb(ECONTROL(p)) & 0x01)
169 break;
170 if (signal_pending(current))
171 break;
172 udelay(5);
173 }
174
175 /* Poll slowly. */
176 while (!(inb(ECONTROL(p)) & 0x01)) {
177 if (time_after_eq(jiffies, expire))
178 /* The FIFO is stuck. */
179 return -EBUSY;
180 schedule_timeout_interruptible(
181 msecs_to_jiffies(10));
182 if (signal_pending(current))
183 break;
184 }
185 }
186 }
187
188 if (mode >= 2 && m >= 2) {
189 /* We have to go through mode 001 */
190 oecr &= ~(7 << 5);
191 oecr |= ECR_PS2 << 5;
192 ECR_WRITE(p, oecr);
193 }
194
195 /* Set the mode. */
196 oecr &= ~(7 << 5);
197 oecr |= m << 5;
198 ECR_WRITE(p, oecr);
199 return 0;
200}
201#endif /* FIFO support */
202
203/*
204 * Clear TIMEOUT BIT in EPP MODE
205 *
206 * This is also used in SPP detection.
207 */
208static int clear_epp_timeout(struct parport *pb)
209{
210 unsigned char r;
211
212 if (!(parport_pc_read_status(pb) & 0x01))
213 return 1;
214
215 /* To clear timeout some chips require double read */
216 parport_pc_read_status(pb);
217 r = parport_pc_read_status(pb);
218 outb(r | 0x01, STATUS(pb)); /* Some reset by writing 1 */
219 outb(r & 0xfe, STATUS(pb)); /* Others by writing 0 */
220 r = parport_pc_read_status(pb);
221
222 return !(r & 0x01);
223}
224
225/*
226 * Access functions.
227 *
228 * Most of these aren't static because they may be used by the
229 * parport_xxx_yyy macros. extern __inline__ versions of several
230 * of these are in parport_pc.h.
231 */
232
233static void parport_pc_init_state(struct pardevice *dev,
234 struct parport_state *s)
235{
236 s->u.pc.ctr = 0xc;
237 if (dev->irq_func &&
238 dev->port->irq != PARPORT_IRQ_NONE)
239 /* Set ackIntEn */
240 s->u.pc.ctr |= 0x10;
241
242 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
243 * D.Gruszka VScom */
244}
245
246static void parport_pc_save_state(struct parport *p, struct parport_state *s)
247{
248 const struct parport_pc_private *priv = p->physport->private_data;
249 s->u.pc.ctr = priv->ctr;
250 if (priv->ecr)
251 s->u.pc.ecr = inb(ECONTROL(p));
252}
253
254static void parport_pc_restore_state(struct parport *p,
255 struct parport_state *s)
256{
257 struct parport_pc_private *priv = p->physport->private_data;
258 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
259 outb(c, CONTROL(p));
260 priv->ctr = c;
261 if (priv->ecr)
262 ECR_WRITE(p, s->u.pc.ecr);
263}
264
265#ifdef CONFIG_PARPORT_1284
266static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
267 size_t length, int flags)
268{
269 size_t got = 0;
270
271 if (flags & PARPORT_W91284PIC) {
272 unsigned char status;
273 size_t left = length;
274
275 /* use knowledge about data lines..:
276 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
277 * pError is 1 if there are 16 bytes in the Warp's FIFO
278 */
279 status = inb(STATUS(port));
280
281 while (!(status & 0x08) && got < length) {
282 if (left >= 16 && (status & 0x20) && !(status & 0x08)) {
283 /* can grab 16 bytes from warp fifo */
284 if (!((long)buf & 0x03))
285 insl(EPPDATA(port), buf, 4);
286 else
287 insb(EPPDATA(port), buf, 16);
288 buf += 16;
289 got += 16;
290 left -= 16;
291 } else {
292 /* grab single byte from the warp fifo */
293 *((char *)buf) = inb(EPPDATA(port));
294 buf++;
295 got++;
296 left--;
297 }
298 status = inb(STATUS(port));
299 if (status & 0x01) {
300 /* EPP timeout should never occur... */
301 printk(KERN_DEBUG
302"%s: EPP timeout occurred while talking to w91284pic (should not have done)\n", port->name);
303 clear_epp_timeout(port);
304 }
305 }
306 return got;
307 }
308 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
309 if (!(((long)buf | length) & 0x03))
310 insl(EPPDATA(port), buf, (length >> 2));
311 else
312 insb(EPPDATA(port), buf, length);
313 if (inb(STATUS(port)) & 0x01) {
314 clear_epp_timeout(port);
315 return -EIO;
316 }
317 return length;
318 }
319 for (; got < length; got++) {
320 *((char *)buf) = inb(EPPDATA(port));
321 buf++;
322 if (inb(STATUS(port)) & 0x01) {
323 /* EPP timeout */
324 clear_epp_timeout(port);
325 break;
326 }
327 }
328
329 return got;
330}
331
332static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
333 size_t length, int flags)
334{
335 size_t written = 0;
336
337 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
338 if (!(((long)buf | length) & 0x03))
339 outsl(EPPDATA(port), buf, (length >> 2));
340 else
341 outsb(EPPDATA(port), buf, length);
342 if (inb(STATUS(port)) & 0x01) {
343 clear_epp_timeout(port);
344 return -EIO;
345 }
346 return length;
347 }
348 for (; written < length; written++) {
349 outb(*((char *)buf), EPPDATA(port));
350 buf++;
351 if (inb(STATUS(port)) & 0x01) {
352 clear_epp_timeout(port);
353 break;
354 }
355 }
356
357 return written;
358}
359
360static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
361 size_t length, int flags)
362{
363 size_t got = 0;
364
365 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
366 insb(EPPADDR(port), buf, length);
367 if (inb(STATUS(port)) & 0x01) {
368 clear_epp_timeout(port);
369 return -EIO;
370 }
371 return length;
372 }
373 for (; got < length; got++) {
374 *((char *)buf) = inb(EPPADDR(port));
375 buf++;
376 if (inb(STATUS(port)) & 0x01) {
377 clear_epp_timeout(port);
378 break;
379 }
380 }
381
382 return got;
383}
384
385static size_t parport_pc_epp_write_addr(struct parport *port,
386 const void *buf, size_t length,
387 int flags)
388{
389 size_t written = 0;
390
391 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
392 outsb(EPPADDR(port), buf, length);
393 if (inb(STATUS(port)) & 0x01) {
394 clear_epp_timeout(port);
395 return -EIO;
396 }
397 return length;
398 }
399 for (; written < length; written++) {
400 outb(*((char *)buf), EPPADDR(port));
401 buf++;
402 if (inb(STATUS(port)) & 0x01) {
403 clear_epp_timeout(port);
404 break;
405 }
406 }
407
408 return written;
409}
410
411static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
412 size_t length, int flags)
413{
414 size_t got;
415
416 frob_set_mode(port, ECR_EPP);
417 parport_pc_data_reverse(port);
418 parport_pc_write_control(port, 0x4);
419 got = parport_pc_epp_read_data(port, buf, length, flags);
420 frob_set_mode(port, ECR_PS2);
421
422 return got;
423}
424
425static size_t parport_pc_ecpepp_write_data(struct parport *port,
426 const void *buf, size_t length,
427 int flags)
428{
429 size_t written;
430
431 frob_set_mode(port, ECR_EPP);
432 parport_pc_write_control(port, 0x4);
433 parport_pc_data_forward(port);
434 written = parport_pc_epp_write_data(port, buf, length, flags);
435 frob_set_mode(port, ECR_PS2);
436
437 return written;
438}
439
440static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
441 size_t length, int flags)
442{
443 size_t got;
444
445 frob_set_mode(port, ECR_EPP);
446 parport_pc_data_reverse(port);
447 parport_pc_write_control(port, 0x4);
448 got = parport_pc_epp_read_addr(port, buf, length, flags);
449 frob_set_mode(port, ECR_PS2);
450
451 return got;
452}
453
454static size_t parport_pc_ecpepp_write_addr(struct parport *port,
455 const void *buf, size_t length,
456 int flags)
457{
458 size_t written;
459
460 frob_set_mode(port, ECR_EPP);
461 parport_pc_write_control(port, 0x4);
462 parport_pc_data_forward(port);
463 written = parport_pc_epp_write_addr(port, buf, length, flags);
464 frob_set_mode(port, ECR_PS2);
465
466 return written;
467}
468#endif /* IEEE 1284 support */
469
470#ifdef CONFIG_PARPORT_PC_FIFO
471static size_t parport_pc_fifo_write_block_pio(struct parport *port,
472 const void *buf, size_t length)
473{
474 int ret = 0;
475 const unsigned char *bufp = buf;
476 size_t left = length;
477 unsigned long expire = jiffies + port->physport->cad->timeout;
478 const int fifo = FIFO(port);
479 int poll_for = 8; /* 80 usecs */
480 const struct parport_pc_private *priv = port->physport->private_data;
481 const int fifo_depth = priv->fifo_depth;
482
483 port = port->physport;
484
485 /* We don't want to be interrupted every character. */
486 parport_pc_disable_irq(port);
487 /* set nErrIntrEn and serviceIntr */
488 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
489
490 /* Forward mode. */
491 parport_pc_data_forward(port); /* Must be in PS2 mode */
492
493 while (left) {
494 unsigned char byte;
495 unsigned char ecrval = inb(ECONTROL(port));
496 int i = 0;
497
498 if (need_resched() && time_before(jiffies, expire))
499 /* Can't yield the port. */
500 schedule();
501
502 /* Anyone else waiting for the port? */
503 if (port->waithead) {
504 printk(KERN_DEBUG "Somebody wants the port\n");
505 break;
506 }
507
508 if (ecrval & 0x02) {
509 /* FIFO is full. Wait for interrupt. */
510
511 /* Clear serviceIntr */
512 ECR_WRITE(port, ecrval & ~(1<<2));
513false_alarm:
514 ret = parport_wait_event(port, HZ);
515 if (ret < 0)
516 break;
517 ret = 0;
518 if (!time_before(jiffies, expire)) {
519 /* Timed out. */
520 printk(KERN_DEBUG "FIFO write timed out\n");
521 break;
522 }
523 ecrval = inb(ECONTROL(port));
524 if (!(ecrval & (1<<2))) {
525 if (need_resched() &&
526 time_before(jiffies, expire))
527 schedule();
528
529 goto false_alarm;
530 }
531
532 continue;
533 }
534
535 /* Can't fail now. */
536 expire = jiffies + port->cad->timeout;
537
538poll:
539 if (signal_pending(current))
540 break;
541
542 if (ecrval & 0x01) {
543 /* FIFO is empty. Blast it full. */
544 const int n = left < fifo_depth ? left : fifo_depth;
545 outsb(fifo, bufp, n);
546 bufp += n;
547 left -= n;
548
549 /* Adjust the poll time. */
550 if (i < (poll_for - 2))
551 poll_for--;
552 continue;
553 } else if (i++ < poll_for) {
554 udelay(10);
555 ecrval = inb(ECONTROL(port));
556 goto poll;
557 }
558
559 /* Half-full(call me an optimist) */
560 byte = *bufp++;
561 outb(byte, fifo);
562 left--;
563 }
564 dump_parport_state("leave fifo_write_block_pio", port);
565 return length - left;
566}
567
568#ifdef HAS_DMA
569static size_t parport_pc_fifo_write_block_dma(struct parport *port,
570 const void *buf, size_t length)
571{
572 int ret = 0;
573 unsigned long dmaflag;
574 size_t left = length;
575 const struct parport_pc_private *priv = port->physport->private_data;
576 struct device *dev = port->physport->dev;
577 dma_addr_t dma_addr, dma_handle;
578 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
579 unsigned long start = (unsigned long) buf;
580 unsigned long end = (unsigned long) buf + length - 1;
581
582 dump_parport_state("enter fifo_write_block_dma", port);
583 if (end < MAX_DMA_ADDRESS) {
584 /* If it would cross a 64k boundary, cap it at the end. */
585 if ((start ^ end) & ~0xffffUL)
586 maxlen = 0x10000 - (start & 0xffff);
587
588 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
589 DMA_TO_DEVICE);
590 } else {
591 /* above 16 MB we use a bounce buffer as ISA-DMA
592 is not possible */
593 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
594 dma_addr = priv->dma_handle;
595 dma_handle = 0;
596 }
597
598 port = port->physport;
599
600 /* We don't want to be interrupted every character. */
601 parport_pc_disable_irq(port);
602 /* set nErrIntrEn and serviceIntr */
603 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
604
605 /* Forward mode. */
606 parport_pc_data_forward(port); /* Must be in PS2 mode */
607
608 while (left) {
609 unsigned long expire = jiffies + port->physport->cad->timeout;
610
611 size_t count = left;
612
613 if (count > maxlen)
614 count = maxlen;
615
616 if (!dma_handle) /* bounce buffer ! */
617 memcpy(priv->dma_buf, buf, count);
618
619 dmaflag = claim_dma_lock();
620 disable_dma(port->dma);
621 clear_dma_ff(port->dma);
622 set_dma_mode(port->dma, DMA_MODE_WRITE);
623 set_dma_addr(port->dma, dma_addr);
624 set_dma_count(port->dma, count);
625
626 /* Set DMA mode */
627 frob_econtrol(port, 1<<3, 1<<3);
628
629 /* Clear serviceIntr */
630 frob_econtrol(port, 1<<2, 0);
631
632 enable_dma(port->dma);
633 release_dma_lock(dmaflag);
634
635 /* assume DMA will be successful */
636 left -= count;
637 buf += count;
638 if (dma_handle)
639 dma_addr += count;
640
641 /* Wait for interrupt. */
642false_alarm:
643 ret = parport_wait_event(port, HZ);
644 if (ret < 0)
645 break;
646 ret = 0;
647 if (!time_before(jiffies, expire)) {
648 /* Timed out. */
649 printk(KERN_DEBUG "DMA write timed out\n");
650 break;
651 }
652 /* Is serviceIntr set? */
653 if (!(inb(ECONTROL(port)) & (1<<2))) {
654 cond_resched();
655
656 goto false_alarm;
657 }
658
659 dmaflag = claim_dma_lock();
660 disable_dma(port->dma);
661 clear_dma_ff(port->dma);
662 count = get_dma_residue(port->dma);
663 release_dma_lock(dmaflag);
664
665 cond_resched(); /* Can't yield the port. */
666
667 /* Anyone else waiting for the port? */
668 if (port->waithead) {
669 printk(KERN_DEBUG "Somebody wants the port\n");
670 break;
671 }
672
673 /* update for possible DMA residue ! */
674 buf -= count;
675 left += count;
676 if (dma_handle)
677 dma_addr -= count;
678 }
679
680 /* Maybe got here through break, so adjust for DMA residue! */
681 dmaflag = claim_dma_lock();
682 disable_dma(port->dma);
683 clear_dma_ff(port->dma);
684 left += get_dma_residue(port->dma);
685 release_dma_lock(dmaflag);
686
687 /* Turn off DMA mode */
688 frob_econtrol(port, 1<<3, 0);
689
690 if (dma_handle)
691 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
692
693 dump_parport_state("leave fifo_write_block_dma", port);
694 return length - left;
695}
696#endif
697
698static inline size_t parport_pc_fifo_write_block(struct parport *port,
699 const void *buf, size_t length)
700{
701#ifdef HAS_DMA
702 if (port->dma != PARPORT_DMA_NONE)
703 return parport_pc_fifo_write_block_dma(port, buf, length);
704#endif
705 return parport_pc_fifo_write_block_pio(port, buf, length);
706}
707
708/* Parallel Port FIFO mode (ECP chipsets) */
709static size_t parport_pc_compat_write_block_pio(struct parport *port,
710 const void *buf, size_t length,
711 int flags)
712{
713 size_t written;
714 int r;
715 unsigned long expire;
716 const struct parport_pc_private *priv = port->physport->private_data;
717
718 /* Special case: a timeout of zero means we cannot call schedule().
719 * Also if O_NONBLOCK is set then use the default implementation. */
720 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
721 return parport_ieee1284_write_compat(port, buf,
722 length, flags);
723
724 /* Set up parallel port FIFO mode.*/
725 parport_pc_data_forward(port); /* Must be in PS2 mode */
726 parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0);
727 r = change_mode(port, ECR_PPF); /* Parallel port FIFO */
728 if (r)
729 printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
730 port->name);
731
732 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
733
734 /* Write the data to the FIFO. */
735 written = parport_pc_fifo_write_block(port, buf, length);
736
737 /* Finish up. */
738 /* For some hardware we don't want to touch the mode until
739 * the FIFO is empty, so allow 4 seconds for each position
740 * in the fifo.
741 */
742 expire = jiffies + (priv->fifo_depth * HZ * 4);
743 do {
744 /* Wait for the FIFO to empty */
745 r = change_mode(port, ECR_PS2);
746 if (r != -EBUSY)
747 break;
748 } while (time_before(jiffies, expire));
749 if (r == -EBUSY) {
750
751 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
752
753 /* Prevent further data transfer. */
754 frob_set_mode(port, ECR_TST);
755
756 /* Adjust for the contents of the FIFO. */
757 for (written -= priv->fifo_depth; ; written++) {
758 if (inb(ECONTROL(port)) & 0x2) {
759 /* Full up. */
760 break;
761 }
762 outb(0, FIFO(port));
763 }
764
765 /* Reset the FIFO and return to PS2 mode. */
766 frob_set_mode(port, ECR_PS2);
767 }
768
769 r = parport_wait_peripheral(port,
770 PARPORT_STATUS_BUSY,
771 PARPORT_STATUS_BUSY);
772 if (r)
773 printk(KERN_DEBUG
774 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
775 port->name, r);
776
777 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
778
779 return written;
780}
781
782/* ECP */
783#ifdef CONFIG_PARPORT_1284
784static size_t parport_pc_ecp_write_block_pio(struct parport *port,
785 const void *buf, size_t length,
786 int flags)
787{
788 size_t written;
789 int r;
790 unsigned long expire;
791 const struct parport_pc_private *priv = port->physport->private_data;
792
793 /* Special case: a timeout of zero means we cannot call schedule().
794 * Also if O_NONBLOCK is set then use the default implementation. */
795 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
796 return parport_ieee1284_ecp_write_data(port, buf,
797 length, flags);
798
799 /* Switch to forward mode if necessary. */
800 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
801 /* Event 47: Set nInit high. */
802 parport_frob_control(port,
803 PARPORT_CONTROL_INIT
804 | PARPORT_CONTROL_AUTOFD,
805 PARPORT_CONTROL_INIT
806 | PARPORT_CONTROL_AUTOFD);
807
808 /* Event 49: PError goes high. */
809 r = parport_wait_peripheral(port,
810 PARPORT_STATUS_PAPEROUT,
811 PARPORT_STATUS_PAPEROUT);
812 if (r) {
813 printk(KERN_DEBUG "%s: PError timeout (%d) "
814 "in ecp_write_block_pio\n", port->name, r);
815 }
816 }
817
818 /* Set up ECP parallel port mode.*/
819 parport_pc_data_forward(port); /* Must be in PS2 mode */
820 parport_pc_frob_control(port,
821 PARPORT_CONTROL_STROBE |
822 PARPORT_CONTROL_AUTOFD,
823 0);
824 r = change_mode(port, ECR_ECP); /* ECP FIFO */
825 if (r)
826 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
827 port->name);
828 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
829
830 /* Write the data to the FIFO. */
831 written = parport_pc_fifo_write_block(port, buf, length);
832
833 /* Finish up. */
834 /* For some hardware we don't want to touch the mode until
835 * the FIFO is empty, so allow 4 seconds for each position
836 * in the fifo.
837 */
838 expire = jiffies + (priv->fifo_depth * (HZ * 4));
839 do {
840 /* Wait for the FIFO to empty */
841 r = change_mode(port, ECR_PS2);
842 if (r != -EBUSY)
843 break;
844 } while (time_before(jiffies, expire));
845 if (r == -EBUSY) {
846
847 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
848
849 /* Prevent further data transfer. */
850 frob_set_mode(port, ECR_TST);
851
852 /* Adjust for the contents of the FIFO. */
853 for (written -= priv->fifo_depth; ; written++) {
854 if (inb(ECONTROL(port)) & 0x2) {
855 /* Full up. */
856 break;
857 }
858 outb(0, FIFO(port));
859 }
860
861 /* Reset the FIFO and return to PS2 mode. */
862 frob_set_mode(port, ECR_PS2);
863
864 /* Host transfer recovery. */
865 parport_pc_data_reverse(port); /* Must be in PS2 mode */
866 udelay(5);
867 parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
868 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
869 if (r)
870 printk(KERN_DEBUG "%s: PE,1 timeout (%d) "
871 "in ecp_write_block_pio\n", port->name, r);
872
873 parport_frob_control(port,
874 PARPORT_CONTROL_INIT,
875 PARPORT_CONTROL_INIT);
876 r = parport_wait_peripheral(port,
877 PARPORT_STATUS_PAPEROUT,
878 PARPORT_STATUS_PAPEROUT);
879 if (r)
880 printk(KERN_DEBUG "%s: PE,2 timeout (%d) "
881 "in ecp_write_block_pio\n", port->name, r);
882 }
883
884 r = parport_wait_peripheral(port,
885 PARPORT_STATUS_BUSY,
886 PARPORT_STATUS_BUSY);
887 if (r)
888 printk(KERN_DEBUG
889 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
890 port->name, r);
891
892 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
893
894 return written;
895}
896#endif /* IEEE 1284 support */
897#endif /* Allowed to use FIFO/DMA */
898
899
900/*
901 * ******************************************
902 * INITIALISATION AND MODULE STUFF BELOW HERE
903 * ******************************************
904 */
905
906/* GCC is not inlining extern inline function later overwritten to non-inline,
907 so we use outlined_ variants here. */
908static const struct parport_operations parport_pc_ops = {
909 .write_data = parport_pc_write_data,
910 .read_data = parport_pc_read_data,
911
912 .write_control = parport_pc_write_control,
913 .read_control = parport_pc_read_control,
914 .frob_control = parport_pc_frob_control,
915
916 .read_status = parport_pc_read_status,
917
918 .enable_irq = parport_pc_enable_irq,
919 .disable_irq = parport_pc_disable_irq,
920
921 .data_forward = parport_pc_data_forward,
922 .data_reverse = parport_pc_data_reverse,
923
924 .init_state = parport_pc_init_state,
925 .save_state = parport_pc_save_state,
926 .restore_state = parport_pc_restore_state,
927
928 .epp_write_data = parport_ieee1284_epp_write_data,
929 .epp_read_data = parport_ieee1284_epp_read_data,
930 .epp_write_addr = parport_ieee1284_epp_write_addr,
931 .epp_read_addr = parport_ieee1284_epp_read_addr,
932
933 .ecp_write_data = parport_ieee1284_ecp_write_data,
934 .ecp_read_data = parport_ieee1284_ecp_read_data,
935 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
936
937 .compat_write_data = parport_ieee1284_write_compat,
938 .nibble_read_data = parport_ieee1284_read_nibble,
939 .byte_read_data = parport_ieee1284_read_byte,
940
941 .owner = THIS_MODULE,
942};
943
944#ifdef CONFIG_PARPORT_PC_SUPERIO
945
946static struct superio_struct *find_free_superio(void)
947{
948 int i;
949 for (i = 0; i < NR_SUPERIOS; i++)
950 if (superios[i].io == 0)
951 return &superios[i];
952 return NULL;
953}
954
955
956/* Super-IO chipset detection, Winbond, SMSC */
957static void show_parconfig_smsc37c669(int io, int key)
958{
959 int cr1, cr4, cra, cr23, cr26, cr27;
960 struct superio_struct *s;
961
962 static const char *const modes[] = {
963 "SPP and Bidirectional (PS/2)",
964 "EPP and SPP",
965 "ECP",
966 "ECP and EPP" };
967
968 outb(key, io);
969 outb(key, io);
970 outb(1, io);
971 cr1 = inb(io + 1);
972 outb(4, io);
973 cr4 = inb(io + 1);
974 outb(0x0a, io);
975 cra = inb(io + 1);
976 outb(0x23, io);
977 cr23 = inb(io + 1);
978 outb(0x26, io);
979 cr26 = inb(io + 1);
980 outb(0x27, io);
981 cr27 = inb(io + 1);
982 outb(0xaa, io);
983
984 if (verbose_probing) {
985 printk(KERN_INFO
986 "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
987 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
988 cr1, cr4, cra, cr23, cr26, cr27);
989
990 /* The documentation calls DMA and IRQ-Lines by letters, so
991 the board maker can/will wire them
992 appropriately/randomly... G=reserved H=IDE-irq, */
993 printk(KERN_INFO
994 "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n",
995 cr23 * 4,
996 (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
997 (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-',
998 cra & 0x0f);
999 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
1000 (cr23 * 4 >= 0x100) ? "yes" : "no",
1001 (cr1 & 4) ? "yes" : "no");
1002 printk(KERN_INFO
1003 "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1004 (cr1 & 0x08) ? "Standard mode only (SPP)"
1005 : modes[cr4 & 0x03],
1006 (cr4 & 0x40) ? "1.7" : "1.9");
1007 }
1008
1009 /* Heuristics ! BIOS setup for this mainboard device limits
1010 the choices to standard settings, i.e. io-address and IRQ
1011 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1012 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1013 if (cr23 * 4 >= 0x100) { /* if active */
1014 s = find_free_superio();
1015 if (s == NULL)
1016 printk(KERN_INFO "Super-IO: too many chips!\n");
1017 else {
1018 int d;
1019 switch (cr23 * 4) {
1020 case 0x3bc:
1021 s->io = 0x3bc;
1022 s->irq = 7;
1023 break;
1024 case 0x378:
1025 s->io = 0x378;
1026 s->irq = 7;
1027 break;
1028 case 0x278:
1029 s->io = 0x278;
1030 s->irq = 5;
1031 }
1032 d = (cr26 & 0x0f);
1033 if (d == 1 || d == 3)
1034 s->dma = d;
1035 else
1036 s->dma = PARPORT_DMA_NONE;
1037 }
1038 }
1039}
1040
1041
1042static void show_parconfig_winbond(int io, int key)
1043{
1044 int cr30, cr60, cr61, cr70, cr74, crf0;
1045 struct superio_struct *s;
1046 static const char *const modes[] = {
1047 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1048 "EPP-1.9 and SPP",
1049 "ECP",
1050 "ECP and EPP-1.9",
1051 "Standard (SPP)",
1052 "EPP-1.7 and SPP", /* 5 */
1053 "undefined!",
1054 "ECP and EPP-1.7" };
1055 static char *const irqtypes[] = {
1056 "pulsed low, high-Z",
1057 "follows nACK" };
1058
1059 /* The registers are called compatible-PnP because the
1060 register layout is modelled after ISA-PnP, the access
1061 method is just another ... */
1062 outb(key, io);
1063 outb(key, io);
1064 outb(0x07, io); /* Register 7: Select Logical Device */
1065 outb(0x01, io + 1); /* LD1 is Parallel Port */
1066 outb(0x30, io);
1067 cr30 = inb(io + 1);
1068 outb(0x60, io);
1069 cr60 = inb(io + 1);
1070 outb(0x61, io);
1071 cr61 = inb(io + 1);
1072 outb(0x70, io);
1073 cr70 = inb(io + 1);
1074 outb(0x74, io);
1075 cr74 = inb(io + 1);
1076 outb(0xf0, io);
1077 crf0 = inb(io + 1);
1078 outb(0xaa, io);
1079
1080 if (verbose_probing) {
1081 printk(KERN_INFO
1082 "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n",
1083 cr30, cr60, cr61, cr70, cr74, crf0);
1084 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1085 (cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f);
1086 if ((cr74 & 0x07) > 3)
1087 pr_cont("dma=none\n");
1088 else
1089 pr_cont("dma=%d\n", cr74 & 0x07);
1090 printk(KERN_INFO
1091 "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1092 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1093 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n",
1094 modes[crf0 & 0x07]);
1095 }
1096
1097 if (cr30 & 0x01) { /* the settings can be interrogated later ... */
1098 s = find_free_superio();
1099 if (s == NULL)
1100 printk(KERN_INFO "Super-IO: too many chips!\n");
1101 else {
1102 s->io = (cr60 << 8) | cr61;
1103 s->irq = cr70 & 0x0f;
1104 s->dma = (((cr74 & 0x07) > 3) ?
1105 PARPORT_DMA_NONE : (cr74 & 0x07));
1106 }
1107 }
1108}
1109
1110static void decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1111{
1112 const char *type = "unknown";
1113 int id, progif = 2;
1114
1115 if (devid == devrev)
1116 /* simple heuristics, we happened to read some
1117 non-winbond register */
1118 return;
1119
1120 id = (devid << 8) | devrev;
1121
1122 /* Values are from public data sheets pdf files, I can just
1123 confirm 83977TF is correct :-) */
1124 if (id == 0x9771)
1125 type = "83977F/AF";
1126 else if (id == 0x9773)
1127 type = "83977TF / SMSC 97w33x/97w34x";
1128 else if (id == 0x9774)
1129 type = "83977ATF";
1130 else if ((id & ~0x0f) == 0x5270)
1131 type = "83977CTF / SMSC 97w36x";
1132 else if ((id & ~0x0f) == 0x52f0)
1133 type = "83977EF / SMSC 97w35x";
1134 else if ((id & ~0x0f) == 0x5210)
1135 type = "83627";
1136 else if ((id & ~0x0f) == 0x6010)
1137 type = "83697HF";
1138 else if ((oldid & 0x0f) == 0x0a) {
1139 type = "83877F";
1140 progif = 1;
1141 } else if ((oldid & 0x0f) == 0x0b) {
1142 type = "83877AF";
1143 progif = 1;
1144 } else if ((oldid & 0x0f) == 0x0c) {
1145 type = "83877TF";
1146 progif = 1;
1147 } else if ((oldid & 0x0f) == 0x0d) {
1148 type = "83877ATF";
1149 progif = 1;
1150 } else
1151 progif = 0;
1152
1153 if (verbose_probing)
1154 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1155 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1156 efer, key, devid, devrev, oldid, type);
1157
1158 if (progif == 2)
1159 show_parconfig_winbond(efer, key);
1160}
1161
1162static void decode_smsc(int efer, int key, int devid, int devrev)
1163{
1164 const char *type = "unknown";
1165 void (*func)(int io, int key);
1166 int id;
1167
1168 if (devid == devrev)
1169 /* simple heuristics, we happened to read some
1170 non-smsc register */
1171 return;
1172
1173 func = NULL;
1174 id = (devid << 8) | devrev;
1175
1176 if (id == 0x0302) {
1177 type = "37c669";
1178 func = show_parconfig_smsc37c669;
1179 } else if (id == 0x6582)
1180 type = "37c665IR";
1181 else if (devid == 0x65)
1182 type = "37c665GT";
1183 else if (devid == 0x66)
1184 type = "37c666GT";
1185
1186 if (verbose_probing)
1187 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1188 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1189 efer, key, devid, devrev, type);
1190
1191 if (func)
1192 func(efer, key);
1193}
1194
1195
1196static void winbond_check(int io, int key)
1197{
1198 int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1199
1200 if (!request_region(io, 3, __func__))
1201 return;
1202
1203 origval = inb(io); /* Save original value */
1204
1205 /* First probe without key */
1206 outb(0x20, io);
1207 x_devid = inb(io + 1);
1208 outb(0x21, io);
1209 x_devrev = inb(io + 1);
1210 outb(0x09, io);
1211 x_oldid = inb(io + 1);
1212
1213 outb(key, io);
1214 outb(key, io); /* Write Magic Sequence to EFER, extended
1215 function enable register */
1216 outb(0x20, io); /* Write EFIR, extended function index register */
1217 devid = inb(io + 1); /* Read EFDR, extended function data register */
1218 outb(0x21, io);
1219 devrev = inb(io + 1);
1220 outb(0x09, io);
1221 oldid = inb(io + 1);
1222 outb(0xaa, io); /* Magic Seal */
1223
1224 outb(origval, io); /* in case we poked some entirely different hardware */
1225
1226 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1227 goto out; /* protection against false positives */
1228
1229 decode_winbond(io, key, devid, devrev, oldid);
1230out:
1231 release_region(io, 3);
1232}
1233
1234static void winbond_check2(int io, int key)
1235{
1236 int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1237
1238 if (!request_region(io, 3, __func__))
1239 return;
1240
1241 origval[0] = inb(io); /* Save original values */
1242 origval[1] = inb(io + 1);
1243 origval[2] = inb(io + 2);
1244
1245 /* First probe without the key */
1246 outb(0x20, io + 2);
1247 x_devid = inb(io + 2);
1248 outb(0x21, io + 1);
1249 x_devrev = inb(io + 2);
1250 outb(0x09, io + 1);
1251 x_oldid = inb(io + 2);
1252
1253 outb(key, io); /* Write Magic Byte to EFER, extended
1254 function enable register */
1255 outb(0x20, io + 2); /* Write EFIR, extended function index register */
1256 devid = inb(io + 2); /* Read EFDR, extended function data register */
1257 outb(0x21, io + 1);
1258 devrev = inb(io + 2);
1259 outb(0x09, io + 1);
1260 oldid = inb(io + 2);
1261 outb(0xaa, io); /* Magic Seal */
1262
1263 outb(origval[0], io); /* in case we poked some entirely different hardware */
1264 outb(origval[1], io + 1);
1265 outb(origval[2], io + 2);
1266
1267 if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
1268 goto out; /* protection against false positives */
1269
1270 decode_winbond(io, key, devid, devrev, oldid);
1271out:
1272 release_region(io, 3);
1273}
1274
1275static void smsc_check(int io, int key)
1276{
1277 int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
1278
1279 if (!request_region(io, 3, __func__))
1280 return;
1281
1282 origval = inb(io); /* Save original value */
1283
1284 /* First probe without the key */
1285 outb(0x0d, io);
1286 x_oldid = inb(io + 1);
1287 outb(0x0e, io);
1288 x_oldrev = inb(io + 1);
1289 outb(0x20, io);
1290 x_id = inb(io + 1);
1291 outb(0x21, io);
1292 x_rev = inb(io + 1);
1293
1294 outb(key, io);
1295 outb(key, io); /* Write Magic Sequence to EFER, extended
1296 function enable register */
1297 outb(0x0d, io); /* Write EFIR, extended function index register */
1298 oldid = inb(io + 1); /* Read EFDR, extended function data register */
1299 outb(0x0e, io);
1300 oldrev = inb(io + 1);
1301 outb(0x20, io);
1302 id = inb(io + 1);
1303 outb(0x21, io);
1304 rev = inb(io + 1);
1305 outb(0xaa, io); /* Magic Seal */
1306
1307 outb(origval, io); /* in case we poked some entirely different hardware */
1308
1309 if (x_id == id && x_oldrev == oldrev &&
1310 x_oldid == oldid && x_rev == rev)
1311 goto out; /* protection against false positives */
1312
1313 decode_smsc(io, key, oldid, oldrev);
1314out:
1315 release_region(io, 3);
1316}
1317
1318
1319static void detect_and_report_winbond(void)
1320{
1321 if (verbose_probing)
1322 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1323 winbond_check(0x3f0, 0x87);
1324 winbond_check(0x370, 0x87);
1325 winbond_check(0x2e , 0x87);
1326 winbond_check(0x4e , 0x87);
1327 winbond_check(0x3f0, 0x86);
1328 winbond_check2(0x250, 0x88);
1329 winbond_check2(0x250, 0x89);
1330}
1331
1332static void detect_and_report_smsc(void)
1333{
1334 if (verbose_probing)
1335 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1336 smsc_check(0x3f0, 0x55);
1337 smsc_check(0x370, 0x55);
1338 smsc_check(0x3f0, 0x44);
1339 smsc_check(0x370, 0x44);
1340}
1341
1342static void detect_and_report_it87(void)
1343{
1344 u16 dev;
1345 u8 origval, r;
1346 if (verbose_probing)
1347 printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
1348 if (!request_muxed_region(0x2e, 2, __func__))
1349 return;
1350 origval = inb(0x2e); /* Save original value */
1351 outb(0x87, 0x2e);
1352 outb(0x01, 0x2e);
1353 outb(0x55, 0x2e);
1354 outb(0x55, 0x2e);
1355 outb(0x20, 0x2e);
1356 dev = inb(0x2f) << 8;
1357 outb(0x21, 0x2e);
1358 dev |= inb(0x2f);
1359 if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 ||
1360 dev == 0x8716 || dev == 0x8718 || dev == 0x8726) {
1361 printk(KERN_INFO "IT%04X SuperIO detected.\n", dev);
1362 outb(0x07, 0x2E); /* Parallel Port */
1363 outb(0x03, 0x2F);
1364 outb(0xF0, 0x2E); /* BOOT 0x80 off */
1365 r = inb(0x2f);
1366 outb(0xF0, 0x2E);
1367 outb(r | 8, 0x2F);
1368 outb(0x02, 0x2E); /* Lock */
1369 outb(0x02, 0x2F);
1370 } else {
1371 outb(origval, 0x2e); /* Oops, sorry to disturb */
1372 }
1373 release_region(0x2e, 2);
1374}
1375#endif /* CONFIG_PARPORT_PC_SUPERIO */
1376
1377static struct superio_struct *find_superio(struct parport *p)
1378{
1379 int i;
1380 for (i = 0; i < NR_SUPERIOS; i++)
1381 if (superios[i].io == p->base)
1382 return &superios[i];
1383 return NULL;
1384}
1385
1386static int get_superio_dma(struct parport *p)
1387{
1388 struct superio_struct *s = find_superio(p);
1389 if (s)
1390 return s->dma;
1391 return PARPORT_DMA_NONE;
1392}
1393
1394static int get_superio_irq(struct parport *p)
1395{
1396 struct superio_struct *s = find_superio(p);
1397 if (s)
1398 return s->irq;
1399 return PARPORT_IRQ_NONE;
1400}
1401
1402
1403/* --- Mode detection ------------------------------------- */
1404
1405/*
1406 * Checks for port existence, all ports support SPP MODE
1407 * Returns:
1408 * 0 : No parallel port at this address
1409 * PARPORT_MODE_PCSPP : SPP port detected
1410 * (if the user specified an ioport himself,
1411 * this shall always be the case!)
1412 *
1413 */
1414static int parport_SPP_supported(struct parport *pb)
1415{
1416 unsigned char r, w;
1417
1418 /*
1419 * first clear an eventually pending EPP timeout
1420 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1421 * that does not even respond to SPP cycles if an EPP
1422 * timeout is pending
1423 */
1424 clear_epp_timeout(pb);
1425
1426 /* Do a simple read-write test to make sure the port exists. */
1427 w = 0xc;
1428 outb(w, CONTROL(pb));
1429
1430 /* Is there a control register that we can read from? Some
1431 * ports don't allow reads, so read_control just returns a
1432 * software copy. Some ports _do_ allow reads, so bypass the
1433 * software copy here. In addition, some bits aren't
1434 * writable. */
1435 r = inb(CONTROL(pb));
1436 if ((r & 0xf) == w) {
1437 w = 0xe;
1438 outb(w, CONTROL(pb));
1439 r = inb(CONTROL(pb));
1440 outb(0xc, CONTROL(pb));
1441 if ((r & 0xf) == w)
1442 return PARPORT_MODE_PCSPP;
1443 }
1444
1445 if (user_specified)
1446 /* That didn't work, but the user thinks there's a
1447 * port here. */
1448 printk(KERN_INFO "parport 0x%lx (WARNING): CTR: "
1449 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1450
1451 /* Try the data register. The data lines aren't tri-stated at
1452 * this stage, so we expect back what we wrote. */
1453 w = 0xaa;
1454 parport_pc_write_data(pb, w);
1455 r = parport_pc_read_data(pb);
1456 if (r == w) {
1457 w = 0x55;
1458 parport_pc_write_data(pb, w);
1459 r = parport_pc_read_data(pb);
1460 if (r == w)
1461 return PARPORT_MODE_PCSPP;
1462 }
1463
1464 if (user_specified) {
1465 /* Didn't work, but the user is convinced this is the
1466 * place. */
1467 printk(KERN_INFO "parport 0x%lx (WARNING): DATA: "
1468 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1469 printk(KERN_INFO "parport 0x%lx: You gave this address, "
1470 "but there is probably no parallel port there!\n",
1471 pb->base);
1472 }
1473
1474 /* It's possible that we can't read the control register or
1475 * the data register. In that case just believe the user. */
1476 if (user_specified)
1477 return PARPORT_MODE_PCSPP;
1478
1479 return 0;
1480}
1481
1482/* Check for ECR
1483 *
1484 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1485 * on these cards actually accesses the CTR.
1486 *
1487 * Modern cards don't do this but reading from ECR will return 0xff
1488 * regardless of what is written here if the card does NOT support
1489 * ECP.
1490 *
1491 * We first check to see if ECR is the same as CTR. If not, the low
1492 * two bits of ECR aren't writable, so we check by writing ECR and
1493 * reading it back to see if it's what we expect.
1494 */
1495static int parport_ECR_present(struct parport *pb)
1496{
1497 struct parport_pc_private *priv = pb->private_data;
1498 unsigned char r = 0xc;
1499
1500 outb(r, CONTROL(pb));
1501 if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) {
1502 outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */
1503
1504 r = inb(CONTROL(pb));
1505 if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
1506 goto no_reg; /* Sure that no ECR register exists */
1507 }
1508
1509 if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
1510 goto no_reg;
1511
1512 ECR_WRITE(pb, 0x34);
1513 if (inb(ECONTROL(pb)) != 0x35)
1514 goto no_reg;
1515
1516 priv->ecr = 1;
1517 outb(0xc, CONTROL(pb));
1518
1519 /* Go to mode 000 */
1520 frob_set_mode(pb, ECR_SPP);
1521
1522 return 1;
1523
1524 no_reg:
1525 outb(0xc, CONTROL(pb));
1526 return 0;
1527}
1528
1529#ifdef CONFIG_PARPORT_1284
1530/* Detect PS/2 support.
1531 *
1532 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1533 * allows us to read data from the data lines. In theory we would get back
1534 * 0xff but any peripheral attached to the port may drag some or all of the
1535 * lines down to zero. So if we get back anything that isn't the contents
1536 * of the data register we deem PS/2 support to be present.
1537 *
1538 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1539 * drivers, but an external peripheral with sufficiently beefy drivers of
1540 * its own can overpower them and assert its own levels onto the bus, from
1541 * where they can then be read back as normal. Ports with this property
1542 * and the right type of device attached are likely to fail the SPP test,
1543 * (as they will appear to have stuck bits) and so the fact that they might
1544 * be misdetected here is rather academic.
1545 */
1546
1547static int parport_PS2_supported(struct parport *pb)
1548{
1549 int ok = 0;
1550
1551 clear_epp_timeout(pb);
1552
1553 /* try to tri-state the buffer */
1554 parport_pc_data_reverse(pb);
1555
1556 parport_pc_write_data(pb, 0x55);
1557 if (parport_pc_read_data(pb) != 0x55)
1558 ok++;
1559
1560 parport_pc_write_data(pb, 0xaa);
1561 if (parport_pc_read_data(pb) != 0xaa)
1562 ok++;
1563
1564 /* cancel input mode */
1565 parport_pc_data_forward(pb);
1566
1567 if (ok) {
1568 pb->modes |= PARPORT_MODE_TRISTATE;
1569 } else {
1570 struct parport_pc_private *priv = pb->private_data;
1571 priv->ctr_writable &= ~0x20;
1572 }
1573
1574 return ok;
1575}
1576
1577#ifdef CONFIG_PARPORT_PC_FIFO
1578static int parport_ECP_supported(struct parport *pb)
1579{
1580 int i;
1581 int config, configb;
1582 int pword;
1583 struct parport_pc_private *priv = pb->private_data;
1584 /* Translate ECP intrLine to ISA irq value */
1585 static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 };
1586
1587 /* If there is no ECR, we have no hope of supporting ECP. */
1588 if (!priv->ecr)
1589 return 0;
1590
1591 /* Find out FIFO depth */
1592 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1593 ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */
1594 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++)
1595 outb(0xaa, FIFO(pb));
1596
1597 /*
1598 * Using LGS chipset it uses ECR register, but
1599 * it doesn't support ECP or FIFO MODE
1600 */
1601 if (i == 1024) {
1602 ECR_WRITE(pb, ECR_SPP << 5);
1603 return 0;
1604 }
1605
1606 priv->fifo_depth = i;
1607 if (verbose_probing)
1608 printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1609
1610 /* Find out writeIntrThreshold */
1611 frob_econtrol(pb, 1<<2, 1<<2);
1612 frob_econtrol(pb, 1<<2, 0);
1613 for (i = 1; i <= priv->fifo_depth; i++) {
1614 inb(FIFO(pb));
1615 udelay(50);
1616 if (inb(ECONTROL(pb)) & (1<<2))
1617 break;
1618 }
1619
1620 if (i <= priv->fifo_depth) {
1621 if (verbose_probing)
1622 printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1623 pb->base, i);
1624 } else
1625 /* Number of bytes we know we can write if we get an
1626 interrupt. */
1627 i = 0;
1628
1629 priv->writeIntrThreshold = i;
1630
1631 /* Find out readIntrThreshold */
1632 frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1633 parport_pc_data_reverse(pb); /* Must be in PS2 mode */
1634 frob_set_mode(pb, ECR_TST); /* Test FIFO */
1635 frob_econtrol(pb, 1<<2, 1<<2);
1636 frob_econtrol(pb, 1<<2, 0);
1637 for (i = 1; i <= priv->fifo_depth; i++) {
1638 outb(0xaa, FIFO(pb));
1639 if (inb(ECONTROL(pb)) & (1<<2))
1640 break;
1641 }
1642
1643 if (i <= priv->fifo_depth) {
1644 if (verbose_probing)
1645 printk(KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1646 pb->base, i);
1647 } else
1648 /* Number of bytes we can read if we get an interrupt. */
1649 i = 0;
1650
1651 priv->readIntrThreshold = i;
1652
1653 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1654 ECR_WRITE(pb, 0xf4); /* Configuration mode */
1655 config = inb(CONFIGA(pb));
1656 pword = (config >> 4) & 0x7;
1657 switch (pword) {
1658 case 0:
1659 pword = 2;
1660 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1661 pb->base);
1662 break;
1663 case 2:
1664 pword = 4;
1665 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1666 pb->base);
1667 break;
1668 default:
1669 printk(KERN_WARNING "0x%lx: Unknown implementation ID\n",
1670 pb->base);
1671 /* Fall through - Assume 1 */
1672 case 1:
1673 pword = 1;
1674 }
1675 priv->pword = pword;
1676
1677 if (verbose_probing) {
1678 printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
1679 pb->base, 8 * pword);
1680
1681 printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1682 config & 0x80 ? "Level" : "Pulses");
1683
1684 configb = inb(CONFIGB(pb));
1685 printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1686 pb->base, config, configb);
1687 printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1688 if ((configb >> 3) & 0x07)
1689 pr_cont("%d", intrline[(configb >> 3) & 0x07]);
1690 else
1691 pr_cont("<none or set by other means>");
1692 pr_cont(" dma=");
1693 if ((configb & 0x03) == 0x00)
1694 pr_cont("<none or set by other means>\n");
1695 else
1696 pr_cont("%d\n", configb & 0x07);
1697 }
1698
1699 /* Go back to mode 000 */
1700 frob_set_mode(pb, ECR_SPP);
1701
1702 return 1;
1703}
1704#endif
1705
1706#ifdef CONFIG_X86_32
1707static int intel_bug_present_check_epp(struct parport *pb)
1708{
1709 const struct parport_pc_private *priv = pb->private_data;
1710 int bug_present = 0;
1711
1712 if (priv->ecr) {
1713 /* store value of ECR */
1714 unsigned char ecr = inb(ECONTROL(pb));
1715 unsigned char i;
1716 for (i = 0x00; i < 0x80; i += 0x20) {
1717 ECR_WRITE(pb, i);
1718 if (clear_epp_timeout(pb)) {
1719 /* Phony EPP in ECP. */
1720 bug_present = 1;
1721 break;
1722 }
1723 }
1724 /* return ECR into the inital state */
1725 ECR_WRITE(pb, ecr);
1726 }
1727
1728 return bug_present;
1729}
1730static int intel_bug_present(struct parport *pb)
1731{
1732/* Check whether the device is legacy, not PCI or PCMCIA. Only legacy is known to be affected. */
1733 if (pb->dev != NULL) {
1734 return 0;
1735 }
1736
1737 return intel_bug_present_check_epp(pb);
1738}
1739#else
1740static int intel_bug_present(struct parport *pb)
1741{
1742 return 0;
1743}
1744#endif /* CONFIG_X86_32 */
1745
1746static int parport_ECPPS2_supported(struct parport *pb)
1747{
1748 const struct parport_pc_private *priv = pb->private_data;
1749 int result;
1750 unsigned char oecr;
1751
1752 if (!priv->ecr)
1753 return 0;
1754
1755 oecr = inb(ECONTROL(pb));
1756 ECR_WRITE(pb, ECR_PS2 << 5);
1757 result = parport_PS2_supported(pb);
1758 ECR_WRITE(pb, oecr);
1759 return result;
1760}
1761
1762/* EPP mode detection */
1763
1764static int parport_EPP_supported(struct parport *pb)
1765{
1766 /*
1767 * Theory:
1768 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1769 * when EPP is possible and is set high when an EPP timeout
1770 * occurs (EPP uses the HALT line to stop the CPU while it does
1771 * the byte transfer, an EPP timeout occurs if the attached
1772 * device fails to respond after 10 micro seconds).
1773 *
1774 * This bit is cleared by either reading it (National Semi)
1775 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1776 * This bit is always high in non EPP modes.
1777 */
1778
1779 /* If EPP timeout bit clear then EPP available */
1780 if (!clear_epp_timeout(pb))
1781 return 0; /* No way to clear timeout */
1782
1783 /* Check for Intel bug. */
1784 if (intel_bug_present(pb))
1785 return 0;
1786
1787 pb->modes |= PARPORT_MODE_EPP;
1788
1789 /* Set up access functions to use EPP hardware. */
1790 pb->ops->epp_read_data = parport_pc_epp_read_data;
1791 pb->ops->epp_write_data = parport_pc_epp_write_data;
1792 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1793 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1794
1795 return 1;
1796}
1797
1798static int parport_ECPEPP_supported(struct parport *pb)
1799{
1800 struct parport_pc_private *priv = pb->private_data;
1801 int result;
1802 unsigned char oecr;
1803
1804 if (!priv->ecr)
1805 return 0;
1806
1807 oecr = inb(ECONTROL(pb));
1808 /* Search for SMC style EPP+ECP mode */
1809 ECR_WRITE(pb, 0x80);
1810 outb(0x04, CONTROL(pb));
1811 result = parport_EPP_supported(pb);
1812
1813 ECR_WRITE(pb, oecr);
1814
1815 if (result) {
1816 /* Set up access functions to use ECP+EPP hardware. */
1817 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1818 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1819 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1820 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1821 }
1822
1823 return result;
1824}
1825
1826#else /* No IEEE 1284 support */
1827
1828/* Don't bother probing for modes we know we won't use. */
1829static int parport_PS2_supported(struct parport *pb) { return 0; }
1830#ifdef CONFIG_PARPORT_PC_FIFO
1831static int parport_ECP_supported(struct parport *pb)
1832{
1833 return 0;
1834}
1835#endif
1836static int parport_EPP_supported(struct parport *pb)
1837{
1838 return 0;
1839}
1840
1841static int parport_ECPEPP_supported(struct parport *pb)
1842{
1843 return 0;
1844}
1845
1846static int parport_ECPPS2_supported(struct parport *pb)
1847{
1848 return 0;
1849}
1850
1851#endif /* No IEEE 1284 support */
1852
1853/* --- IRQ detection -------------------------------------- */
1854
1855/* Only if supports ECP mode */
1856static int programmable_irq_support(struct parport *pb)
1857{
1858 int irq, intrLine;
1859 unsigned char oecr = inb(ECONTROL(pb));
1860 static const int lookup[8] = {
1861 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1862 };
1863
1864 ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
1865
1866 intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
1867 irq = lookup[intrLine];
1868
1869 ECR_WRITE(pb, oecr);
1870 return irq;
1871}
1872
1873static int irq_probe_ECP(struct parport *pb)
1874{
1875 int i;
1876 unsigned long irqs;
1877
1878 irqs = probe_irq_on();
1879
1880 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1881 ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
1882 ECR_WRITE(pb, ECR_TST << 5);
1883
1884 /* If Full FIFO sure that writeIntrThreshold is generated */
1885 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++)
1886 outb(0xaa, FIFO(pb));
1887
1888 pb->irq = probe_irq_off(irqs);
1889 ECR_WRITE(pb, ECR_SPP << 5);
1890
1891 if (pb->irq <= 0)
1892 pb->irq = PARPORT_IRQ_NONE;
1893
1894 return pb->irq;
1895}
1896
1897/*
1898 * This detection seems that only works in National Semiconductors
1899 * This doesn't work in SMC, LGS, and Winbond
1900 */
1901static int irq_probe_EPP(struct parport *pb)
1902{
1903#ifndef ADVANCED_DETECT
1904 return PARPORT_IRQ_NONE;
1905#else
1906 int irqs;
1907 unsigned char oecr;
1908
1909 if (pb->modes & PARPORT_MODE_PCECR)
1910 oecr = inb(ECONTROL(pb));
1911
1912 irqs = probe_irq_on();
1913
1914 if (pb->modes & PARPORT_MODE_PCECR)
1915 frob_econtrol(pb, 0x10, 0x10);
1916
1917 clear_epp_timeout(pb);
1918 parport_pc_frob_control(pb, 0x20, 0x20);
1919 parport_pc_frob_control(pb, 0x10, 0x10);
1920 clear_epp_timeout(pb);
1921
1922 /* Device isn't expecting an EPP read
1923 * and generates an IRQ.
1924 */
1925 parport_pc_read_epp(pb);
1926 udelay(20);
1927
1928 pb->irq = probe_irq_off(irqs);
1929 if (pb->modes & PARPORT_MODE_PCECR)
1930 ECR_WRITE(pb, oecr);
1931 parport_pc_write_control(pb, 0xc);
1932
1933 if (pb->irq <= 0)
1934 pb->irq = PARPORT_IRQ_NONE;
1935
1936 return pb->irq;
1937#endif /* Advanced detection */
1938}
1939
1940static int irq_probe_SPP(struct parport *pb)
1941{
1942 /* Don't even try to do this. */
1943 return PARPORT_IRQ_NONE;
1944}
1945
1946/* We will attempt to share interrupt requests since other devices
1947 * such as sound cards and network cards seem to like using the
1948 * printer IRQs.
1949 *
1950 * When ECP is available we can autoprobe for IRQs.
1951 * NOTE: If we can autoprobe it, we can register the IRQ.
1952 */
1953static int parport_irq_probe(struct parport *pb)
1954{
1955 struct parport_pc_private *priv = pb->private_data;
1956
1957 if (priv->ecr) {
1958 pb->irq = programmable_irq_support(pb);
1959
1960 if (pb->irq == PARPORT_IRQ_NONE)
1961 pb->irq = irq_probe_ECP(pb);
1962 }
1963
1964 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
1965 (pb->modes & PARPORT_MODE_EPP))
1966 pb->irq = irq_probe_EPP(pb);
1967
1968 clear_epp_timeout(pb);
1969
1970 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
1971 pb->irq = irq_probe_EPP(pb);
1972
1973 clear_epp_timeout(pb);
1974
1975 if (pb->irq == PARPORT_IRQ_NONE)
1976 pb->irq = irq_probe_SPP(pb);
1977
1978 if (pb->irq == PARPORT_IRQ_NONE)
1979 pb->irq = get_superio_irq(pb);
1980
1981 return pb->irq;
1982}
1983
1984/* --- DMA detection -------------------------------------- */
1985
1986/* Only if chipset conforms to ECP ISA Interface Standard */
1987static int programmable_dma_support(struct parport *p)
1988{
1989 unsigned char oecr = inb(ECONTROL(p));
1990 int dma;
1991
1992 frob_set_mode(p, ECR_CNF);
1993
1994 dma = inb(CONFIGB(p)) & 0x07;
1995 /* 000: Indicates jumpered 8-bit DMA if read-only.
1996 100: Indicates jumpered 16-bit DMA if read-only. */
1997 if ((dma & 0x03) == 0)
1998 dma = PARPORT_DMA_NONE;
1999
2000 ECR_WRITE(p, oecr);
2001 return dma;
2002}
2003
2004static int parport_dma_probe(struct parport *p)
2005{
2006 const struct parport_pc_private *priv = p->private_data;
2007 if (priv->ecr) /* ask ECP chipset first */
2008 p->dma = programmable_dma_support(p);
2009 if (p->dma == PARPORT_DMA_NONE) {
2010 /* ask known Super-IO chips proper, although these
2011 claim ECP compatible, some don't report their DMA
2012 conforming to ECP standards */
2013 p->dma = get_superio_dma(p);
2014 }
2015
2016 return p->dma;
2017}
2018
2019/* --- Initialisation code -------------------------------- */
2020
2021static LIST_HEAD(ports_list);
2022static DEFINE_SPINLOCK(ports_lock);
2023
2024struct parport *parport_pc_probe_port(unsigned long int base,
2025 unsigned long int base_hi,
2026 int irq, int dma,
2027 struct device *dev,
2028 int irqflags)
2029{
2030 struct parport_pc_private *priv;
2031 struct parport_operations *ops;
2032 struct parport *p;
2033 int probedirq = PARPORT_IRQ_NONE;
2034 struct resource *base_res;
2035 struct resource *ECR_res = NULL;
2036 struct resource *EPP_res = NULL;
2037 struct platform_device *pdev = NULL;
2038 int ret;
2039
2040 if (!dev) {
2041 /* We need a physical device to attach to, but none was
2042 * provided. Create our own. */
2043 pdev = platform_device_register_simple("parport_pc",
2044 base, NULL, 0);
2045 if (IS_ERR(pdev))
2046 return NULL;
2047 dev = &pdev->dev;
2048
2049 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
2050 if (ret) {
2051 dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
2052 dma = PARPORT_DMA_NONE;
2053 }
2054 }
2055
2056 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
2057 if (!ops)
2058 goto out1;
2059
2060 priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
2061 if (!priv)
2062 goto out2;
2063
2064 /* a misnomer, actually - it's allocate and reserve parport number */
2065 p = parport_register_port(base, irq, dma, ops);
2066 if (!p)
2067 goto out3;
2068
2069 base_res = request_region(base, 3, p->name);
2070 if (!base_res)
2071 goto out4;
2072
2073 memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
2074 priv->ctr = 0xc;
2075 priv->ctr_writable = ~0x10;
2076 priv->ecr = 0;
2077 priv->fifo_depth = 0;
2078 priv->dma_buf = NULL;
2079 priv->dma_handle = 0;
2080 INIT_LIST_HEAD(&priv->list);
2081 priv->port = p;
2082
2083 p->dev = dev;
2084 p->base_hi = base_hi;
2085 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2086 p->private_data = priv;
2087
2088 if (base_hi) {
2089 ECR_res = request_region(base_hi, 3, p->name);
2090 if (ECR_res)
2091 parport_ECR_present(p);
2092 }
2093
2094 if (base != 0x3bc) {
2095 EPP_res = request_region(base+0x3, 5, p->name);
2096 if (EPP_res)
2097 if (!parport_EPP_supported(p))
2098 parport_ECPEPP_supported(p);
2099 }
2100 if (!parport_SPP_supported(p))
2101 /* No port. */
2102 goto out5;
2103 if (priv->ecr)
2104 parport_ECPPS2_supported(p);
2105 else
2106 parport_PS2_supported(p);
2107
2108 p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
2109
2110 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2111 if (p->base_hi && priv->ecr)
2112 printk(KERN_CONT " (0x%lx)", p->base_hi);
2113 if (p->irq == PARPORT_IRQ_AUTO) {
2114 p->irq = PARPORT_IRQ_NONE;
2115 parport_irq_probe(p);
2116 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2117 p->irq = PARPORT_IRQ_NONE;
2118 parport_irq_probe(p);
2119 probedirq = p->irq;
2120 p->irq = PARPORT_IRQ_NONE;
2121 }
2122 if (p->irq != PARPORT_IRQ_NONE) {
2123 printk(KERN_CONT ", irq %d", p->irq);
2124 priv->ctr_writable |= 0x10;
2125
2126 if (p->dma == PARPORT_DMA_AUTO) {
2127 p->dma = PARPORT_DMA_NONE;
2128 parport_dma_probe(p);
2129 }
2130 }
2131 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2132 is mandatory (see above) */
2133 p->dma = PARPORT_DMA_NONE;
2134
2135#ifdef CONFIG_PARPORT_PC_FIFO
2136 if (parport_ECP_supported(p) &&
2137 p->dma != PARPORT_DMA_NOFIFO &&
2138 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2139 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2140 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2141#ifdef CONFIG_PARPORT_1284
2142 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2143 /* currently broken, but working on it.. (FB) */
2144 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2145#endif /* IEEE 1284 support */
2146 if (p->dma != PARPORT_DMA_NONE) {
2147 printk(KERN_CONT ", dma %d", p->dma);
2148 p->modes |= PARPORT_MODE_DMA;
2149 } else
2150 printk(KERN_CONT ", using FIFO");
2151 } else
2152 /* We can't use the DMA channel after all. */
2153 p->dma = PARPORT_DMA_NONE;
2154#endif /* Allowed to use FIFO/DMA */
2155
2156 printk(KERN_CONT " [");
2157
2158#define printmode(x) \
2159 {\
2160 if (p->modes & PARPORT_MODE_##x) {\
2161 printk(KERN_CONT "%s%s", f ? "," : "", #x);\
2162 f++;\
2163 } \
2164 }
2165
2166 {
2167 int f = 0;
2168 printmode(PCSPP);
2169 printmode(TRISTATE);
2170 printmode(COMPAT)
2171 printmode(EPP);
2172 printmode(ECP);
2173 printmode(DMA);
2174 }
2175#undef printmode
2176#ifndef CONFIG_PARPORT_1284
2177 printk(KERN_CONT "(,...)");
2178#endif /* CONFIG_PARPORT_1284 */
2179 printk(KERN_CONT "]\n");
2180 if (probedirq != PARPORT_IRQ_NONE)
2181 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2182
2183 /* If No ECP release the ports grabbed above. */
2184 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2185 release_region(base_hi, 3);
2186 ECR_res = NULL;
2187 }
2188 /* Likewise for EEP ports */
2189 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2190 release_region(base+3, 5);
2191 EPP_res = NULL;
2192 }
2193 if (p->irq != PARPORT_IRQ_NONE) {
2194 if (request_irq(p->irq, parport_irq_handler,
2195 irqflags, p->name, p)) {
2196 printk(KERN_WARNING "%s: irq %d in use, "
2197 "resorting to polled operation\n",
2198 p->name, p->irq);
2199 p->irq = PARPORT_IRQ_NONE;
2200 p->dma = PARPORT_DMA_NONE;
2201 }
2202
2203#ifdef CONFIG_PARPORT_PC_FIFO
2204#ifdef HAS_DMA
2205 if (p->dma != PARPORT_DMA_NONE) {
2206 if (request_dma(p->dma, p->name)) {
2207 printk(KERN_WARNING "%s: dma %d in use, "
2208 "resorting to PIO operation\n",
2209 p->name, p->dma);
2210 p->dma = PARPORT_DMA_NONE;
2211 } else {
2212 priv->dma_buf =
2213 dma_alloc_coherent(dev,
2214 PAGE_SIZE,
2215 &priv->dma_handle,
2216 GFP_KERNEL);
2217 if (!priv->dma_buf) {
2218 printk(KERN_WARNING "%s: "
2219 "cannot get buffer for DMA, "
2220 "resorting to PIO operation\n",
2221 p->name);
2222 free_dma(p->dma);
2223 p->dma = PARPORT_DMA_NONE;
2224 }
2225 }
2226 }
2227#endif
2228#endif
2229 }
2230
2231 /* Done probing. Now put the port into a sensible start-up state. */
2232 if (priv->ecr)
2233 /*
2234 * Put the ECP detected port in PS2 mode.
2235 * Do this also for ports that have ECR but don't do ECP.
2236 */
2237 ECR_WRITE(p, 0x34);
2238
2239 parport_pc_write_data(p, 0);
2240 parport_pc_data_forward(p);
2241
2242 /* Now that we've told the sharing engine about the port, and
2243 found out its characteristics, let the high-level drivers
2244 know about it. */
2245 spin_lock(&ports_lock);
2246 list_add(&priv->list, &ports_list);
2247 spin_unlock(&ports_lock);
2248 parport_announce_port(p);
2249
2250 return p;
2251
2252out5:
2253 if (ECR_res)
2254 release_region(base_hi, 3);
2255 if (EPP_res)
2256 release_region(base+0x3, 5);
2257 release_region(base, 3);
2258out4:
2259 parport_del_port(p);
2260out3:
2261 kfree(priv);
2262out2:
2263 kfree(ops);
2264out1:
2265 if (pdev)
2266 platform_device_unregister(pdev);
2267 return NULL;
2268}
2269EXPORT_SYMBOL(parport_pc_probe_port);
2270
2271void parport_pc_unregister_port(struct parport *p)
2272{
2273 struct parport_pc_private *priv = p->private_data;
2274 struct parport_operations *ops = p->ops;
2275
2276 parport_remove_port(p);
2277 spin_lock(&ports_lock);
2278 list_del_init(&priv->list);
2279 spin_unlock(&ports_lock);
2280#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2281 if (p->dma != PARPORT_DMA_NONE)
2282 free_dma(p->dma);
2283#endif
2284 if (p->irq != PARPORT_IRQ_NONE)
2285 free_irq(p->irq, p);
2286 release_region(p->base, 3);
2287 if (p->size > 3)
2288 release_region(p->base + 3, p->size - 3);
2289 if (p->modes & PARPORT_MODE_ECP)
2290 release_region(p->base_hi, 3);
2291#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2292 if (priv->dma_buf)
2293 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2294 priv->dma_buf,
2295 priv->dma_handle);
2296#endif
2297 kfree(p->private_data);
2298 parport_del_port(p);
2299 kfree(ops); /* hope no-one cached it */
2300}
2301EXPORT_SYMBOL(parport_pc_unregister_port);
2302
2303#ifdef CONFIG_PCI
2304
2305/* ITE support maintained by Rich Liu <richliu@poorman.org> */
2306static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
2307 const struct parport_pc_via_data *via)
2308{
2309 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2310 u32 ite8872set;
2311 u32 ite8872_lpt, ite8872_lpthi;
2312 u8 ite8872_irq, type;
2313 int irq;
2314 int i;
2315
2316 DPRINTK(KERN_DEBUG "sio_ite_8872_probe()\n");
2317
2318 /* make sure which one chip */
2319 for (i = 0; i < 5; i++) {
2320 if (request_region(inta_addr[i], 32, "it887x")) {
2321 int test;
2322 pci_write_config_dword(pdev, 0x60,
2323 0xe5000000 | inta_addr[i]);
2324 pci_write_config_dword(pdev, 0x78,
2325 0x00000000 | inta_addr[i]);
2326 test = inb(inta_addr[i]);
2327 if (test != 0xff)
2328 break;
2329 release_region(inta_addr[i], 32);
2330 }
2331 }
2332 if (i >= 5) {
2333 printk(KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2334 return 0;
2335 }
2336
2337 type = inb(inta_addr[i] + 0x18);
2338 type &= 0x0f;
2339
2340 switch (type) {
2341 case 0x2:
2342 printk(KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2343 ite8872set = 0x64200000;
2344 break;
2345 case 0xa:
2346 printk(KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2347 ite8872set = 0x64200000;
2348 break;
2349 case 0xe:
2350 printk(KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2351 ite8872set = 0x64e00000;
2352 break;
2353 case 0x6:
2354 printk(KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2355 release_region(inta_addr[i], 32);
2356 return 0;
2357 case 0x8:
2358 printk(KERN_INFO "parport_pc: ITE8874 found (2S)\n");
2359 release_region(inta_addr[i], 32);
2360 return 0;
2361 default:
2362 printk(KERN_INFO "parport_pc: unknown ITE887x\n");
2363 printk(KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2364 "output to Rich.Liu@ite.com.tw\n");
2365 release_region(inta_addr[i], 32);
2366 return 0;
2367 }
2368
2369 pci_read_config_byte(pdev, 0x3c, &ite8872_irq);
2370 pci_read_config_dword(pdev, 0x1c, &ite8872_lpt);
2371 ite8872_lpt &= 0x0000ff00;
2372 pci_read_config_dword(pdev, 0x20, &ite8872_lpthi);
2373 ite8872_lpthi &= 0x0000ff00;
2374 pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2375 pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2376 pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2377 /* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */
2378 /* SET Parallel IRQ */
2379 pci_write_config_dword(pdev, 0x9c,
2380 ite8872set | (ite8872_irq * 0x11111));
2381
2382 DPRINTK(KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2383 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2384 ite8872_lpt);
2385 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2386 ite8872_lpthi);
2387
2388 /* Let the user (or defaults) steer us away from interrupts */
2389 irq = ite8872_irq;
2390 if (autoirq != PARPORT_IRQ_AUTO)
2391 irq = PARPORT_IRQ_NONE;
2392
2393 /*
2394 * Release the resource so that parport_pc_probe_port can get it.
2395 */
2396 release_region(inta_addr[i], 32);
2397 if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi,
2398 irq, PARPORT_DMA_NONE, &pdev->dev, 0)) {
2399 printk(KERN_INFO
2400 "parport_pc: ITE 8872 parallel port: io=0x%X",
2401 ite8872_lpt);
2402 if (irq != PARPORT_IRQ_NONE)
2403 pr_cont(", irq=%d", irq);
2404 pr_cont("\n");
2405 return 1;
2406 }
2407
2408 return 0;
2409}
2410
2411/* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2412 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2413static int parport_init_mode;
2414
2415/* Data for two known VIA chips */
2416static struct parport_pc_via_data via_686a_data = {
2417 0x51,
2418 0x50,
2419 0x85,
2420 0x02,
2421 0xE2,
2422 0xF0,
2423 0xE6
2424};
2425static struct parport_pc_via_data via_8231_data = {
2426 0x45,
2427 0x44,
2428 0x50,
2429 0x04,
2430 0xF2,
2431 0xFA,
2432 0xF6
2433};
2434
2435static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma,
2436 const struct parport_pc_via_data *via)
2437{
2438 u8 tmp, tmp2, siofunc;
2439 u8 ppcontrol = 0;
2440 int dma, irq;
2441 unsigned port1, port2;
2442 unsigned have_epp = 0;
2443
2444 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2445
2446 switch (parport_init_mode) {
2447 case 1:
2448 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2449 siofunc = VIA_FUNCTION_PARPORT_SPP;
2450 break;
2451 case 2:
2452 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2453 siofunc = VIA_FUNCTION_PARPORT_SPP;
2454 ppcontrol = VIA_PARPORT_BIDIR;
2455 break;
2456 case 3:
2457 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2458 siofunc = VIA_FUNCTION_PARPORT_EPP;
2459 ppcontrol = VIA_PARPORT_BIDIR;
2460 have_epp = 1;
2461 break;
2462 case 4:
2463 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2464 siofunc = VIA_FUNCTION_PARPORT_ECP;
2465 ppcontrol = VIA_PARPORT_BIDIR;
2466 break;
2467 case 5:
2468 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2469 siofunc = VIA_FUNCTION_PARPORT_ECP;
2470 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2471 have_epp = 1;
2472 break;
2473 default:
2474 printk(KERN_DEBUG
2475 "parport_pc: probing current configuration\n");
2476 siofunc = VIA_FUNCTION_PROBE;
2477 break;
2478 }
2479 /*
2480 * unlock super i/o configuration
2481 */
2482 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2483 tmp |= via->via_pci_superio_config_data;
2484 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2485
2486 /* Bits 1-0: Parallel Port Mode / Enable */
2487 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2488 tmp = inb(VIA_CONFIG_DATA);
2489 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2490 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2491 tmp2 = inb(VIA_CONFIG_DATA);
2492 if (siofunc == VIA_FUNCTION_PROBE) {
2493 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2494 ppcontrol = tmp2;
2495 } else {
2496 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2497 tmp |= siofunc;
2498 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2499 outb(tmp, VIA_CONFIG_DATA);
2500 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2501 tmp2 |= ppcontrol;
2502 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2503 outb(tmp2, VIA_CONFIG_DATA);
2504 }
2505
2506 /* Parallel Port I/O Base Address, bits 9-2 */
2507 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2508 port1 = inb(VIA_CONFIG_DATA) << 2;
2509
2510 printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
2511 port1);
2512 if (port1 == 0x3BC && have_epp) {
2513 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2514 outb((0x378 >> 2), VIA_CONFIG_DATA);
2515 printk(KERN_DEBUG
2516 "parport_pc: Parallel port base changed to 0x378\n");
2517 port1 = 0x378;
2518 }
2519
2520 /*
2521 * lock super i/o configuration
2522 */
2523 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2524 tmp &= ~via->via_pci_superio_config_data;
2525 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2526
2527 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2528 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2529 return 0;
2530 }
2531
2532 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2533 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2534 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2535
2536 if (siofunc == VIA_FUNCTION_PARPORT_ECP) {
2537 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2538 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2539 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2540 } else
2541 /* if ECP not enabled, DMA is not enabled, assumed
2542 bogus 'dma' value */
2543 dma = PARPORT_DMA_NONE;
2544
2545 /* Let the user (or defaults) steer us away from interrupts and DMA */
2546 if (autoirq == PARPORT_IRQ_NONE) {
2547 irq = PARPORT_IRQ_NONE;
2548 dma = PARPORT_DMA_NONE;
2549 }
2550 if (autodma == PARPORT_DMA_NONE)
2551 dma = PARPORT_DMA_NONE;
2552
2553 switch (port1) {
2554 case 0x3bc:
2555 port2 = 0x7bc; break;
2556 case 0x378:
2557 port2 = 0x778; break;
2558 case 0x278:
2559 port2 = 0x678; break;
2560 default:
2561 printk(KERN_INFO
2562 "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2563 port1);
2564 return 0;
2565 }
2566
2567 /* filter bogus IRQs */
2568 switch (irq) {
2569 case 0:
2570 case 2:
2571 case 8:
2572 case 13:
2573 irq = PARPORT_IRQ_NONE;
2574 break;
2575
2576 default: /* do nothing */
2577 break;
2578 }
2579
2580 /* finally, do the probe with values obtained */
2581 if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) {
2582 printk(KERN_INFO
2583 "parport_pc: VIA parallel port: io=0x%X", port1);
2584 if (irq != PARPORT_IRQ_NONE)
2585 pr_cont(", irq=%d", irq);
2586 if (dma != PARPORT_DMA_NONE)
2587 pr_cont(", dma=%d", dma);
2588 pr_cont("\n");
2589 return 1;
2590 }
2591
2592 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2593 port1, irq, dma);
2594 return 0;
2595}
2596
2597
2598enum parport_pc_sio_types {
2599 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2600 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2601 sio_ite_8872,
2602 last_sio
2603};
2604
2605/* each element directly indexed from enum list, above */
2606static struct parport_pc_superio {
2607 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2608 const struct parport_pc_via_data *via);
2609 const struct parport_pc_via_data *via;
2610} parport_pc_superio_info[] = {
2611 { sio_via_probe, &via_686a_data, },
2612 { sio_via_probe, &via_8231_data, },
2613 { sio_ite_8872_probe, NULL, },
2614};
2615
2616enum parport_pc_pci_cards {
2617 siig_1p_10x = last_sio,
2618 siig_2p_10x,
2619 siig_1p_20x,
2620 siig_2p_20x,
2621 lava_parallel,
2622 lava_parallel_dual_a,
2623 lava_parallel_dual_b,
2624 boca_ioppar,
2625 plx_9050,
2626 timedia_4006a,
2627 timedia_4014,
2628 timedia_4008a,
2629 timedia_4018,
2630 timedia_9018a,
2631 syba_2p_epp,
2632 syba_1p_ecp,
2633 titan_010l,
2634 avlab_1p,
2635 avlab_2p,
2636 oxsemi_952,
2637 oxsemi_954,
2638 oxsemi_840,
2639 oxsemi_pcie_pport,
2640 aks_0100,
2641 mobility_pp,
2642 netmos_9705,
2643 netmos_9715,
2644 netmos_9755,
2645 netmos_9805,
2646 netmos_9815,
2647 netmos_9901,
2648 netmos_9865,
2649 quatech_sppxp100,
2650 wch_ch382l,
2651};
2652
2653
2654/* each element directly indexed from enum list, above
2655 * (but offset by last_sio) */
2656static struct parport_pc_pci {
2657 int numports;
2658 struct { /* BAR (base address registers) numbers in the config
2659 space header */
2660 int lo;
2661 int hi;
2662 /* -1 if not there, >6 for offset-method (max BAR is 6) */
2663 } addr[4];
2664
2665 /* If set, this is called immediately after pci_enable_device.
2666 * If it returns non-zero, no probing will take place and the
2667 * ports will not be used. */
2668 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2669
2670 /* If set, this is called after probing for ports. If 'failed'
2671 * is non-zero we couldn't use any of the ports. */
2672 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2673} cards[] = {
2674 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2675 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2676 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2677 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2678 /* lava_parallel */ { 1, { { 0, -1 }, } },
2679 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2680 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2681 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2682 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2683 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2684 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2685 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2686 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2687 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2688 /* SYBA uses fixed offsets in
2689 a 1K io window */
2690 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2691 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2692 /* titan_010l */ { 1, { { 3, -1 }, } },
2693 /* avlab_1p */ { 1, { { 0, 1}, } },
2694 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2695 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2696 * and 840 locks up if you write 1 to bit 2! */
2697 /* oxsemi_952 */ { 1, { { 0, 1 }, } },
2698 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2699 /* oxsemi_840 */ { 1, { { 0, 1 }, } },
2700 /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, } },
2701 /* aks_0100 */ { 1, { { 0, -1 }, } },
2702 /* mobility_pp */ { 1, { { 0, 1 }, } },
2703
2704 /* The netmos entries below are untested */
2705 /* netmos_9705 */ { 1, { { 0, -1 }, } },
2706 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
2707 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
2708 /* netmos_9805 */ { 1, { { 0, 1 }, } },
2709 /* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2710 /* netmos_9901 */ { 1, { { 0, -1 }, } },
2711 /* netmos_9865 */ { 1, { { 0, -1 }, } },
2712 /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
2713 /* wch_ch382l */ { 1, { { 2, -1 }, } },
2714};
2715
2716static const struct pci_device_id parport_pc_pci_tbl[] = {
2717 /* Super-IO onboard chips */
2718 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2719 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2720 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2721 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2722
2723 /* PCI cards */
2724 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2725 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2726 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2727 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2728 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2729 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2730 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2731 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2732 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2733 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2734 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2735 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2736 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2737 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2738 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2739 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2740 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2741 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
2742 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2743 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2744 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2745 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2746 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2747 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2748 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2749 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2750 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2751 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2752 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2753 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2754 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2755 /* AFAVLAB_TK9902 */
2756 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
2757 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2758 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2759 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2760 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2761 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2762 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2763 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2764 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
2765 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2766 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
2767 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2768 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
2769 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2770 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
2771 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2772 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
2773 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2774 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
2775 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2776 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
2777 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2778 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
2779 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2780 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2781 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2782 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2783 /* NetMos communication controllers */
2784 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2785 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2786 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2787 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2788 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2789 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2790 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2791 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2792 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2793 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2794 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
2795 0xA000, 0x2000, 0, 0, netmos_9901 },
2796 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2797 0xA000, 0x1000, 0, 0, netmos_9865 },
2798 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2799 0xA000, 0x2000, 0, 0, netmos_9865 },
2800 /* Quatech SPPXP-100 Parallel port PCI ExpressCard */
2801 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
2802 PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
2803 /* WCH CH382L PCI-E single parallel port card */
2804 { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l },
2805 { 0, } /* terminate list */
2806};
2807MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
2808
2809struct pci_parport_data {
2810 int num;
2811 struct parport *ports[2];
2812};
2813
2814static int parport_pc_pci_probe(struct pci_dev *dev,
2815 const struct pci_device_id *id)
2816{
2817 int err, count, n, i = id->driver_data;
2818 struct pci_parport_data *data;
2819
2820 if (i < last_sio)
2821 /* This is an onboard Super-IO and has already been probed */
2822 return 0;
2823
2824 /* This is a PCI card */
2825 i -= last_sio;
2826 count = 0;
2827 err = pci_enable_device(dev);
2828 if (err)
2829 return err;
2830
2831 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2832 if (!data)
2833 return -ENOMEM;
2834
2835 if (cards[i].preinit_hook &&
2836 cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2837 kfree(data);
2838 return -ENODEV;
2839 }
2840
2841 for (n = 0; n < cards[i].numports; n++) {
2842 int lo = cards[i].addr[n].lo;
2843 int hi = cards[i].addr[n].hi;
2844 int irq;
2845 unsigned long io_lo, io_hi;
2846 io_lo = pci_resource_start(dev, lo);
2847 io_hi = 0;
2848 if ((hi >= 0) && (hi <= 6))
2849 io_hi = pci_resource_start(dev, hi);
2850 else if (hi > 6)
2851 io_lo += hi; /* Reinterpret the meaning of
2852 "hi" as an offset (see SYBA
2853 def.) */
2854 /* TODO: test if sharing interrupts works */
2855 irq = dev->irq;
2856 if (irq == IRQ_NONE) {
2857 printk(KERN_DEBUG
2858 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
2859 id->vendor, id->device, io_lo, io_hi);
2860 irq = PARPORT_IRQ_NONE;
2861 } else {
2862 printk(KERN_DEBUG
2863 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
2864 id->vendor, id->device, io_lo, io_hi, irq);
2865 }
2866 data->ports[count] =
2867 parport_pc_probe_port(io_lo, io_hi, irq,
2868 PARPORT_DMA_NONE, &dev->dev,
2869 IRQF_SHARED);
2870 if (data->ports[count])
2871 count++;
2872 }
2873
2874 data->num = count;
2875
2876 if (cards[i].postinit_hook)
2877 cards[i].postinit_hook(dev, count == 0);
2878
2879 if (count) {
2880 pci_set_drvdata(dev, data);
2881 return 0;
2882 }
2883
2884 kfree(data);
2885
2886 return -ENODEV;
2887}
2888
2889static void parport_pc_pci_remove(struct pci_dev *dev)
2890{
2891 struct pci_parport_data *data = pci_get_drvdata(dev);
2892 int i;
2893
2894 if (data) {
2895 for (i = data->num - 1; i >= 0; i--)
2896 parport_pc_unregister_port(data->ports[i]);
2897
2898 kfree(data);
2899 }
2900}
2901
2902static struct pci_driver parport_pc_pci_driver = {
2903 .name = "parport_pc",
2904 .id_table = parport_pc_pci_tbl,
2905 .probe = parport_pc_pci_probe,
2906 .remove = parport_pc_pci_remove,
2907};
2908
2909static int __init parport_pc_init_superio(int autoirq, int autodma)
2910{
2911 const struct pci_device_id *id;
2912 struct pci_dev *pdev = NULL;
2913 int ret = 0;
2914
2915 for_each_pci_dev(pdev) {
2916 id = pci_match_id(parport_pc_pci_tbl, pdev);
2917 if (id == NULL || id->driver_data >= last_sio)
2918 continue;
2919
2920 if (parport_pc_superio_info[id->driver_data].probe(
2921 pdev, autoirq, autodma,
2922 parport_pc_superio_info[id->driver_data].via)) {
2923 ret++;
2924 }
2925 }
2926
2927 return ret; /* number of devices found */
2928}
2929#else
2930static struct pci_driver parport_pc_pci_driver;
2931static int __init parport_pc_init_superio(int autoirq, int autodma)
2932{
2933 return 0;
2934}
2935#endif /* CONFIG_PCI */
2936
2937#ifdef CONFIG_PNP
2938
2939static const struct pnp_device_id parport_pc_pnp_tbl[] = {
2940 /* Standard LPT Printer Port */
2941 {.id = "PNP0400", .driver_data = 0},
2942 /* ECP Printer Port */
2943 {.id = "PNP0401", .driver_data = 0},
2944 { }
2945};
2946
2947MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
2948
2949static int parport_pc_pnp_probe(struct pnp_dev *dev,
2950 const struct pnp_device_id *id)
2951{
2952 struct parport *pdata;
2953 unsigned long io_lo, io_hi;
2954 int dma, irq;
2955
2956 if (pnp_port_valid(dev, 0) &&
2957 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
2958 io_lo = pnp_port_start(dev, 0);
2959 } else
2960 return -EINVAL;
2961
2962 if (pnp_port_valid(dev, 1) &&
2963 !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
2964 io_hi = pnp_port_start(dev, 1);
2965 } else
2966 io_hi = 0;
2967
2968 if (pnp_irq_valid(dev, 0) &&
2969 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
2970 irq = pnp_irq(dev, 0);
2971 } else
2972 irq = PARPORT_IRQ_NONE;
2973
2974 if (pnp_dma_valid(dev, 0) &&
2975 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
2976 dma = pnp_dma(dev, 0);
2977 } else
2978 dma = PARPORT_DMA_NONE;
2979
2980 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
2981 pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
2982 if (pdata == NULL)
2983 return -ENODEV;
2984
2985 pnp_set_drvdata(dev, pdata);
2986 return 0;
2987}
2988
2989static void parport_pc_pnp_remove(struct pnp_dev *dev)
2990{
2991 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
2992 if (!pdata)
2993 return;
2994
2995 parport_pc_unregister_port(pdata);
2996}
2997
2998/* we only need the pnp layer to activate the device, at least for now */
2999static struct pnp_driver parport_pc_pnp_driver = {
3000 .name = "parport_pc",
3001 .id_table = parport_pc_pnp_tbl,
3002 .probe = parport_pc_pnp_probe,
3003 .remove = parport_pc_pnp_remove,
3004};
3005
3006#else
3007static struct pnp_driver parport_pc_pnp_driver;
3008#endif /* CONFIG_PNP */
3009
3010static int parport_pc_platform_probe(struct platform_device *pdev)
3011{
3012 /* Always succeed, the actual probing is done in
3013 * parport_pc_probe_port(). */
3014 return 0;
3015}
3016
3017static struct platform_driver parport_pc_platform_driver = {
3018 .driver = {
3019 .name = "parport_pc",
3020 },
3021 .probe = parport_pc_platform_probe,
3022};
3023
3024/* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3025static int __attribute__((unused))
3026parport_pc_find_isa_ports(int autoirq, int autodma)
3027{
3028 int count = 0;
3029
3030 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
3031 count++;
3032 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
3033 count++;
3034 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
3035 count++;
3036
3037 return count;
3038}
3039
3040/* This function is called by parport_pc_init if the user didn't
3041 * specify any ports to probe. Its job is to find some ports. Order
3042 * is important here -- we want ISA ports to be registered first,
3043 * followed by PCI cards (for least surprise), but before that we want
3044 * to do chipset-specific tests for some onboard ports that we know
3045 * about.
3046 *
3047 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3048 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3049 */
3050static void __init parport_pc_find_ports(int autoirq, int autodma)
3051{
3052 int count = 0, err;
3053
3054#ifdef CONFIG_PARPORT_PC_SUPERIO
3055 detect_and_report_it87();
3056 detect_and_report_winbond();
3057 detect_and_report_smsc();
3058#endif
3059
3060 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3061 count += parport_pc_init_superio(autoirq, autodma);
3062
3063 /* PnP ports, skip detection if SuperIO already found them */
3064 if (!count) {
3065 err = pnp_register_driver(&parport_pc_pnp_driver);
3066 if (!err)
3067 pnp_registered_parport = 1;
3068 }
3069
3070 /* ISA ports and whatever (see asm/parport.h). */
3071 parport_pc_find_nonpci_ports(autoirq, autodma);
3072
3073 err = pci_register_driver(&parport_pc_pci_driver);
3074 if (!err)
3075 pci_registered_parport = 1;
3076}
3077
3078/*
3079 * Piles of crap below pretend to be a parser for module and kernel
3080 * parameters. Say "thank you" to whoever had come up with that
3081 * syntax and keep in mind that code below is a cleaned up version.
3082 */
3083
3084static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
3085 [0 ... PARPORT_PC_MAX_PORTS] = 0
3086};
3087static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
3088 [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
3089};
3090static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
3091 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
3092};
3093static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
3094 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
3095};
3096
3097static int __init parport_parse_param(const char *s, int *val,
3098 int automatic, int none, int nofifo)
3099{
3100 if (!s)
3101 return 0;
3102 if (!strncmp(s, "auto", 4))
3103 *val = automatic;
3104 else if (!strncmp(s, "none", 4))
3105 *val = none;
3106 else if (nofifo && !strncmp(s, "nofifo", 6))
3107 *val = nofifo;
3108 else {
3109 char *ep;
3110 unsigned long r = simple_strtoul(s, &ep, 0);
3111 if (ep != s)
3112 *val = r;
3113 else {
3114 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3115 return -1;
3116 }
3117 }
3118 return 0;
3119}
3120
3121static int __init parport_parse_irq(const char *irqstr, int *val)
3122{
3123 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3124 PARPORT_IRQ_NONE, 0);
3125}
3126
3127static int __init parport_parse_dma(const char *dmastr, int *val)
3128{
3129 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3130 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3131}
3132
3133#ifdef CONFIG_PCI
3134static int __init parport_init_mode_setup(char *str)
3135{
3136 printk(KERN_DEBUG
3137 "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3138
3139 if (!strcmp(str, "spp"))
3140 parport_init_mode = 1;
3141 if (!strcmp(str, "ps2"))
3142 parport_init_mode = 2;
3143 if (!strcmp(str, "epp"))
3144 parport_init_mode = 3;
3145 if (!strcmp(str, "ecp"))
3146 parport_init_mode = 4;
3147 if (!strcmp(str, "ecpepp"))
3148 parport_init_mode = 5;
3149 return 1;
3150}
3151#endif
3152
3153#ifdef MODULE
3154static char *irq[PARPORT_PC_MAX_PORTS];
3155static char *dma[PARPORT_PC_MAX_PORTS];
3156
3157MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3158module_param_hw_array(io, int, ioport, NULL, 0);
3159MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3160module_param_hw_array(io_hi, int, ioport, NULL, 0);
3161MODULE_PARM_DESC(irq, "IRQ line");
3162module_param_hw_array(irq, charp, irq, NULL, 0);
3163MODULE_PARM_DESC(dma, "DMA channel");
3164module_param_hw_array(dma, charp, dma, NULL, 0);
3165#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3166 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3167MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3168module_param(verbose_probing, int, 0644);
3169#endif
3170#ifdef CONFIG_PCI
3171static char *init_mode;
3172MODULE_PARM_DESC(init_mode,
3173 "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3174module_param(init_mode, charp, 0);
3175#endif
3176
3177static int __init parse_parport_params(void)
3178{
3179 unsigned int i;
3180 int val;
3181
3182#ifdef CONFIG_PCI
3183 if (init_mode)
3184 parport_init_mode_setup(init_mode);
3185#endif
3186
3187 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3188 if (parport_parse_irq(irq[i], &val))
3189 return 1;
3190 irqval[i] = val;
3191 if (parport_parse_dma(dma[i], &val))
3192 return 1;
3193 dmaval[i] = val;
3194 }
3195 if (!io[0]) {
3196 /* The user can make us use any IRQs or DMAs we find. */
3197 if (irq[0] && !parport_parse_irq(irq[0], &val))
3198 switch (val) {
3199 case PARPORT_IRQ_NONE:
3200 case PARPORT_IRQ_AUTO:
3201 irqval[0] = val;
3202 break;
3203 default:
3204 printk(KERN_WARNING
3205 "parport_pc: irq specified "
3206 "without base address. Use 'io=' "
3207 "to specify one\n");
3208 }
3209
3210 if (dma[0] && !parport_parse_dma(dma[0], &val))
3211 switch (val) {
3212 case PARPORT_DMA_NONE:
3213 case PARPORT_DMA_AUTO:
3214 dmaval[0] = val;
3215 break;
3216 default:
3217 printk(KERN_WARNING
3218 "parport_pc: dma specified "
3219 "without base address. Use 'io=' "
3220 "to specify one\n");
3221 }
3222 }
3223 return 0;
3224}
3225
3226#else
3227
3228static int parport_setup_ptr __initdata;
3229
3230/*
3231 * Acceptable parameters:
3232 *
3233 * parport=0
3234 * parport=auto
3235 * parport=0xBASE[,IRQ[,DMA]]
3236 *
3237 * IRQ/DMA may be numeric or 'auto' or 'none'
3238 */
3239static int __init parport_setup(char *str)
3240{
3241 char *endptr;
3242 char *sep;
3243 int val;
3244
3245 if (!str || !*str || (*str == '0' && !*(str+1))) {
3246 /* Disable parport if "parport=0" in cmdline */
3247 io[0] = PARPORT_DISABLE;
3248 return 1;
3249 }
3250
3251 if (!strncmp(str, "auto", 4)) {
3252 irqval[0] = PARPORT_IRQ_AUTO;
3253 dmaval[0] = PARPORT_DMA_AUTO;
3254 return 1;
3255 }
3256
3257 val = simple_strtoul(str, &endptr, 0);
3258 if (endptr == str) {
3259 printk(KERN_WARNING "parport=%s not understood\n", str);
3260 return 1;
3261 }
3262
3263 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3264 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3265 return 1;
3266 }
3267
3268 io[parport_setup_ptr] = val;
3269 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3270 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3271
3272 sep = strchr(str, ',');
3273 if (sep++) {
3274 if (parport_parse_irq(sep, &val))
3275 return 1;
3276 irqval[parport_setup_ptr] = val;
3277 sep = strchr(sep, ',');
3278 if (sep++) {
3279 if (parport_parse_dma(sep, &val))
3280 return 1;
3281 dmaval[parport_setup_ptr] = val;
3282 }
3283 }
3284 parport_setup_ptr++;
3285 return 1;
3286}
3287
3288static int __init parse_parport_params(void)
3289{
3290 return io[0] == PARPORT_DISABLE;
3291}
3292
3293__setup("parport=", parport_setup);
3294
3295/*
3296 * Acceptable parameters:
3297 *
3298 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3299 */
3300#ifdef CONFIG_PCI
3301__setup("parport_init_mode=", parport_init_mode_setup);
3302#endif
3303#endif
3304
3305/* "Parser" ends here */
3306
3307static int __init parport_pc_init(void)
3308{
3309 int err;
3310
3311 if (parse_parport_params())
3312 return -EINVAL;
3313
3314 err = platform_driver_register(&parport_pc_platform_driver);
3315 if (err)
3316 return err;
3317
3318 if (io[0]) {
3319 int i;
3320 /* Only probe the ports we were given. */
3321 user_specified = 1;
3322 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3323 if (!io[i])
3324 break;
3325 if (io_hi[i] == PARPORT_IOHI_AUTO)
3326 io_hi[i] = 0x400 + io[i];
3327 parport_pc_probe_port(io[i], io_hi[i],
3328 irqval[i], dmaval[i], NULL, 0);
3329 }
3330 } else
3331 parport_pc_find_ports(irqval[0], dmaval[0]);
3332
3333 return 0;
3334}
3335
3336static void __exit parport_pc_exit(void)
3337{
3338 if (pci_registered_parport)
3339 pci_unregister_driver(&parport_pc_pci_driver);
3340 if (pnp_registered_parport)
3341 pnp_unregister_driver(&parport_pc_pnp_driver);
3342 platform_driver_unregister(&parport_pc_platform_driver);
3343
3344 while (!list_empty(&ports_list)) {
3345 struct parport_pc_private *priv;
3346 struct parport *port;
3347 struct device *dev;
3348 priv = list_entry(ports_list.next,
3349 struct parport_pc_private, list);
3350 port = priv->port;
3351 dev = port->dev;
3352 parport_pc_unregister_port(port);
3353 if (dev && dev->bus == &platform_bus_type)
3354 platform_device_unregister(to_platform_device(dev));
3355 }
3356}
3357
3358MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3359MODULE_DESCRIPTION("PC-style parallel port driver");
3360MODULE_LICENSE("GPL");
3361module_init(parport_pc_init)
3362module_exit(parport_pc_exit)