?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / parport / parport_pc.c
blobd0b597b503983a68f655971970d7392876c3b224
1 /* Low-level parallel-port routines for 8255-based PC-style hardware.
2 *
3 * Authors: Phil Blundell <philb@gnu.org>
4 * Tim Waugh <tim@cyberelk.demon.co.uk>
5 * Jose Renau <renau@acm.org>
6 * David Campbell
7 * Andrea Arcangeli
8 *
9 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
10 *
11 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
12 * DMA support - Bert De Jonghe <bert@sophis.be>
13 * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
14 * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
15 * Various hacks, Fred Barnes, 04/2001
16 * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
17 */
18
19 /* This driver should work with any hardware that is broadly compatible
20 * with that in the IBM PC. This applies to the majority of integrated
21 * I/O chipsets that are commonly available. The expected register
22 * layout is:
23 *
24 * base+0 data
25 * base+1 status
26 * base+2 control
27 *
28 * In addition, there are some optional registers:
29 *
30 * base+3 EPP address
31 * base+4 EPP data
32 * base+0x400 ECP config A
33 * base+0x401 ECP config B
34 * base+0x402 ECP control
35 *
36 * All registers are 8 bits wide and read/write. If your hardware differs
37 * only in register addresses (eg because your registers are on 32-bit
38 * word boundaries) then you can alter the constants in parport_pc.h to
39 * accommodate this.
40 *
41 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
42 * but rather will start at port->base_hi.
43 */
44
45 #include <linux/module.h>
46 #include <linux/init.h>
47 #include <linux/sched.h>
48 #include <linux/delay.h>
49 #include <linux/errno.h>
50 #include <linux/interrupt.h>
51 #include <linux/ioport.h>
52 #include <linux/kernel.h>
53 #include <linux/slab.h>
54 #include <linux/dma-mapping.h>
55 #include <linux/pci.h>
56 #include <linux/pnp.h>
57 #include <linux/platform_device.h>
58 #include <linux/sysctl.h>
59 #include <linux/io.h>
60 #include <linux/uaccess.h>
61
62 #include <asm/dma.h>
63
64 #include <linux/parport.h>
65 #include <linux/parport_pc.h>
66 #include <linux/via.h>
67 #include <asm/parport.h>
68
69 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
70
71 #ifdef CONFIG_ISA_DMA_API
72 #define HAS_DMA
73 #endif
74
75 /* ECR modes */
76 #define ECR_SPP 00
77 #define ECR_PS2 01
78 #define ECR_PPF 02
79 #define ECR_ECP 03
80 #define ECR_EPP 04
81 #define ECR_VND 05
82 #define ECR_TST 06
83 #define ECR_CNF 07
84 #define ECR_MODE_MASK 0xe0
85 #define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v))
86
87 #undef DEBUG
88
89 #ifdef DEBUG
90 #define DPRINTK printk
91 #else
92 #define DPRINTK(stuff...)
93 #endif
94
95
96 #define NR_SUPERIOS 3
97 static struct superio_struct { /* For Super-IO chips autodetection */
98 int io;
99 int irq;
100 int dma;
101 } superios[NR_SUPERIOS] = { {0,},};
102
103 static int user_specified;
104 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
105 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
106 static int verbose_probing;
107 #endif
108 static int pci_registered_parport;
109 static int pnp_registered_parport;
110
111 /* frob_control, but for ECR */
112 static void frob_econtrol(struct parport *pb, unsigned char m,
113 unsigned char v)
114 {
115 unsigned char ectr = 0;
116
117 if (m != 0xff)
118 ectr = inb(ECONTROL(pb));
119
120 DPRINTK(KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n",
121 m, v, ectr, (ectr & ~m) ^ v);
122
123 outb((ectr & ~m) ^ v, ECONTROL(pb));
124 }
125
126 static inline void frob_set_mode(struct parport *p, int mode)
127 {
128 frob_econtrol(p, ECR_MODE_MASK, mode << 5);
129 }
130
131 #ifdef CONFIG_PARPORT_PC_FIFO
132 /* Safely change the mode bits in the ECR
133 Returns:
134 0 : Success
135 -EBUSY: Could not drain FIFO in some finite amount of time,
136 mode not changed!
137 */
138 static int change_mode(struct parport *p, int m)
139 {
140 const struct parport_pc_private *priv = p->physport->private_data;
141 unsigned char oecr;
142 int mode;
143
144 DPRINTK(KERN_INFO "parport change_mode ECP-ISA to mode 0x%02x\n", m);
145
146 if (!priv->ecr) {
147 printk(KERN_DEBUG "change_mode: but there's no ECR!\n");
148 return 0;
149 }
150
151 /* Bits <7:5> contain the mode. */
152 oecr = inb(ECONTROL(p));
153 mode = (oecr >> 5) & 0x7;
154 if (mode == m)
155 return 0;
156
157 if (mode >= 2 && !(priv->ctr & 0x20)) {
158 /* This mode resets the FIFO, so we may
159 * have to wait for it to drain first. */
160 unsigned long expire = jiffies + p->physport->cad->timeout;
161 int counter;
162 switch (mode) {
163 case ECR_PPF: /* Parallel Port FIFO mode */
164 case ECR_ECP: /* ECP Parallel Port mode */
165 /* Busy wait for 200us */
166 for (counter = 0; counter < 40; counter++) {
167 if (inb(ECONTROL(p)) & 0x01)
168 break;
169 if (signal_pending(current))
170 break;
171 udelay(5);
172 }
173
174 /* Poll slowly. */
175 while (!(inb(ECONTROL(p)) & 0x01)) {
176 if (time_after_eq(jiffies, expire))
177 /* The FIFO is stuck. */
178 return -EBUSY;
179 schedule_timeout_interruptible(
180 msecs_to_jiffies(10));
181 if (signal_pending(current))
182 break;
183 }
184 }
185 }
186
187 if (mode >= 2 && m >= 2) {
188 /* We have to go through mode 001 */
189 oecr &= ~(7 << 5);
190 oecr |= ECR_PS2 << 5;
191 ECR_WRITE(p, oecr);
192 }
193
194 /* Set the mode. */
195 oecr &= ~(7 << 5);
196 oecr |= m << 5;
197 ECR_WRITE(p, oecr);
198 return 0;
199 }
200
201 #ifdef CONFIG_PARPORT_1284
202 /* Find FIFO lossage; FIFO is reset */
203 #if 0
204 static int get_fifo_residue(struct parport *p)
205 {
206 int residue;
207 int cnfga;
208 const struct parport_pc_private *priv = p->physport->private_data;
209
210 /* Adjust for the contents of the FIFO. */
211 for (residue = priv->fifo_depth; ; residue--) {
212 if (inb(ECONTROL(p)) & 0x2)
213 /* Full up. */
214 break;
215
216 outb(0, FIFO(p));
217 }
218
219 printk(KERN_DEBUG "%s: %d PWords were left in FIFO\n", p->name,
220 residue);
221
222 /* Reset the FIFO. */
223 frob_set_mode(p, ECR_PS2);
224
225 /* Now change to config mode and clean up. FIXME */
226 frob_set_mode(p, ECR_CNF);
227 cnfga = inb(CONFIGA(p));
228 printk(KERN_DEBUG "%s: cnfgA contains 0x%02x\n", p->name, cnfga);
229
230 if (!(cnfga & (1<<2))) {
231 printk(KERN_DEBUG "%s: Accounting for extra byte\n", p->name);
232 residue++;
233 }
234
235 /* Don't care about partial PWords until support is added for
236 * PWord != 1 byte. */
237
238 /* Back to PS2 mode. */
239 frob_set_mode(p, ECR_PS2);
240
241 DPRINTK(KERN_DEBUG
242 "*** get_fifo_residue: done residue collecting (ecr = 0x%2.2x)\n",
243 inb(ECONTROL(p)));
244 return residue;
245 }
246 #endif /* 0 */
247 #endif /* IEEE 1284 support */
248 #endif /* FIFO support */
249
250 /*
251 * Clear TIMEOUT BIT in EPP MODE
252 *
253 * This is also used in SPP detection.
254 */
255 static int clear_epp_timeout(struct parport *pb)
256 {
257 unsigned char r;
258
259 if (!(parport_pc_read_status(pb) & 0x01))
260 return 1;
261
262 /* To clear timeout some chips require double read */
263 parport_pc_read_status(pb);
264 r = parport_pc_read_status(pb);
265 outb(r | 0x01, STATUS(pb)); /* Some reset by writing 1 */
266 outb(r & 0xfe, STATUS(pb)); /* Others by writing 0 */
267 r = parport_pc_read_status(pb);
268
269 return !(r & 0x01);
270 }
271
272 /*
273 * Access functions.
274 *
275 * Most of these aren't static because they may be used by the
276 * parport_xxx_yyy macros. extern __inline__ versions of several
277 * of these are in parport_pc.h.
278 */
279
280 static void parport_pc_init_state(struct pardevice *dev,
281 struct parport_state *s)
282 {
283 s->u.pc.ctr = 0xc;
284 if (dev->irq_func &&
285 dev->port->irq != PARPORT_IRQ_NONE)
286 /* Set ackIntEn */
287 s->u.pc.ctr |= 0x10;
288
289 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
290 * D.Gruszka VScom */
291 }
292
293 static void parport_pc_save_state(struct parport *p, struct parport_state *s)
294 {
295 const struct parport_pc_private *priv = p->physport->private_data;
296 s->u.pc.ctr = priv->ctr;
297 if (priv->ecr)
298 s->u.pc.ecr = inb(ECONTROL(p));
299 }
300
301 static void parport_pc_restore_state(struct parport *p,
302 struct parport_state *s)
303 {
304 struct parport_pc_private *priv = p->physport->private_data;
305 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
306 outb(c, CONTROL(p));
307 priv->ctr = c;
308 if (priv->ecr)
309 ECR_WRITE(p, s->u.pc.ecr);
310 }
311
312 #ifdef CONFIG_PARPORT_1284
313 static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
314 size_t length, int flags)
315 {
316 size_t got = 0;
317
318 if (flags & PARPORT_W91284PIC) {
319 unsigned char status;
320 size_t left = length;
321
322 /* use knowledge about data lines..:
323 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
324 * pError is 1 if there are 16 bytes in the Warp's FIFO
325 */
326 status = inb(STATUS(port));
327
328 while (!(status & 0x08) && got < length) {
329 if (left >= 16 && (status & 0x20) && !(status & 0x08)) {
330 /* can grab 16 bytes from warp fifo */
331 if (!((long)buf & 0x03))
332 insl(EPPDATA(port), buf, 4);
333 else
334 insb(EPPDATA(port), buf, 16);
335 buf += 16;
336 got += 16;
337 left -= 16;
338 } else {
339 /* grab single byte from the warp fifo */
340 *((char *)buf) = inb(EPPDATA(port));
341 buf++;
342 got++;
343 left--;
344 }
345 status = inb(STATUS(port));
346 if (status & 0x01) {
347 /* EPP timeout should never occur... */
348 printk(KERN_DEBUG
349 "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n", port->name);
350 clear_epp_timeout(port);
351 }
352 }
353 return got;
354 }
355 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
356 if (!(((long)buf | length) & 0x03))
357 insl(EPPDATA(port), buf, (length >> 2));
358 else
359 insb(EPPDATA(port), buf, length);
360 if (inb(STATUS(port)) & 0x01) {
361 clear_epp_timeout(port);
362 return -EIO;
363 }
364 return length;
365 }
366 for (; got < length; got++) {
367 *((char *)buf) = inb(EPPDATA(port));
368 buf++;
369 if (inb(STATUS(port)) & 0x01) {
370 /* EPP timeout */
371 clear_epp_timeout(port);
372 break;
373 }
374 }
375
376 return got;
377 }
378
379 static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
380 size_t length, int flags)
381 {
382 size_t written = 0;
383
384 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
385 if (!(((long)buf | length) & 0x03))
386 outsl(EPPDATA(port), buf, (length >> 2));
387 else
388 outsb(EPPDATA(port), buf, length);
389 if (inb(STATUS(port)) & 0x01) {
390 clear_epp_timeout(port);
391 return -EIO;
392 }
393 return length;
394 }
395 for (; written < length; written++) {
396 outb(*((char *)buf), EPPDATA(port));
397 buf++;
398 if (inb(STATUS(port)) & 0x01) {
399 clear_epp_timeout(port);
400 break;
401 }
402 }
403
404 return written;
405 }
406
407 static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
408 size_t length, int flags)
409 {
410 size_t got = 0;
411
412 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
413 insb(EPPADDR(port), buf, length);
414 if (inb(STATUS(port)) & 0x01) {
415 clear_epp_timeout(port);
416 return -EIO;
417 }
418 return length;
419 }
420 for (; got < length; got++) {
421 *((char *)buf) = inb(EPPADDR(port));
422 buf++;
423 if (inb(STATUS(port)) & 0x01) {
424 clear_epp_timeout(port);
425 break;
426 }
427 }
428
429 return got;
430 }
431
432 static size_t parport_pc_epp_write_addr(struct parport *port,
433 const void *buf, size_t length,
434 int flags)
435 {
436 size_t written = 0;
437
438 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
439 outsb(EPPADDR(port), buf, length);
440 if (inb(STATUS(port)) & 0x01) {
441 clear_epp_timeout(port);
442 return -EIO;
443 }
444 return length;
445 }
446 for (; written < length; written++) {
447 outb(*((char *)buf), EPPADDR(port));
448 buf++;
449 if (inb(STATUS(port)) & 0x01) {
450 clear_epp_timeout(port);
451 break;
452 }
453 }
454
455 return written;
456 }
457
458 static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
459 size_t length, int flags)
460 {
461 size_t got;
462
463 frob_set_mode(port, ECR_EPP);
464 parport_pc_data_reverse(port);
465 parport_pc_write_control(port, 0x4);
466 got = parport_pc_epp_read_data(port, buf, length, flags);
467 frob_set_mode(port, ECR_PS2);
468
469 return got;
470 }
471
472 static size_t parport_pc_ecpepp_write_data(struct parport *port,
473 const void *buf, size_t length,
474 int flags)
475 {
476 size_t written;
477
478 frob_set_mode(port, ECR_EPP);
479 parport_pc_write_control(port, 0x4);
480 parport_pc_data_forward(port);
481 written = parport_pc_epp_write_data(port, buf, length, flags);
482 frob_set_mode(port, ECR_PS2);
483
484 return written;
485 }
486
487 static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
488 size_t length, int flags)
489 {
490 size_t got;
491
492 frob_set_mode(port, ECR_EPP);
493 parport_pc_data_reverse(port);
494 parport_pc_write_control(port, 0x4);
495 got = parport_pc_epp_read_addr(port, buf, length, flags);
496 frob_set_mode(port, ECR_PS2);
497
498 return got;
499 }
500
501 static size_t parport_pc_ecpepp_write_addr(struct parport *port,
502 const void *buf, size_t length,
503 int flags)
504 {
505 size_t written;
506
507 frob_set_mode(port, ECR_EPP);
508 parport_pc_write_control(port, 0x4);
509 parport_pc_data_forward(port);
510 written = parport_pc_epp_write_addr(port, buf, length, flags);
511 frob_set_mode(port, ECR_PS2);
512
513 return written;
514 }
515 #endif /* IEEE 1284 support */
516
517 #ifdef CONFIG_PARPORT_PC_FIFO
518 static size_t parport_pc_fifo_write_block_pio(struct parport *port,
519 const void *buf, size_t length)
520 {
521 int ret = 0;
522 const unsigned char *bufp = buf;
523 size_t left = length;
524 unsigned long expire = jiffies + port->physport->cad->timeout;
525 const int fifo = FIFO(port);
526 int poll_for = 8; /* 80 usecs */
527 const struct parport_pc_private *priv = port->physport->private_data;
528 const int fifo_depth = priv->fifo_depth;
529
530 port = port->physport;
531
532 /* We don't want to be interrupted every character. */
533 parport_pc_disable_irq(port);
534 /* set nErrIntrEn and serviceIntr */
535 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
536
537 /* Forward mode. */
538 parport_pc_data_forward(port); /* Must be in PS2 mode */
539
540 while (left) {
541 unsigned char byte;
542 unsigned char ecrval = inb(ECONTROL(port));
543 int i = 0;
544
545 if (need_resched() && time_before(jiffies, expire))
546 /* Can't yield the port. */
547 schedule();
548
549 /* Anyone else waiting for the port? */
550 if (port->waithead) {
551 printk(KERN_DEBUG "Somebody wants the port\n");
552 break;
553 }
554
555 if (ecrval & 0x02) {
556 /* FIFO is full. Wait for interrupt. */
557
558 /* Clear serviceIntr */
559 ECR_WRITE(port, ecrval & ~(1<<2));
560 false_alarm:
561 ret = parport_wait_event(port, HZ);
562 if (ret < 0)
563 break;
564 ret = 0;
565 if (!time_before(jiffies, expire)) {
566 /* Timed out. */
567 printk(KERN_DEBUG "FIFO write timed out\n");
568 break;
569 }
570 ecrval = inb(ECONTROL(port));
571 if (!(ecrval & (1<<2))) {
572 if (need_resched() &&
573 time_before(jiffies, expire))
574 schedule();
575
576 goto false_alarm;
577 }
578
579 continue;
580 }
581
582 /* Can't fail now. */
583 expire = jiffies + port->cad->timeout;
584
585 poll:
586 if (signal_pending(current))
587 break;
588
589 if (ecrval & 0x01) {
590 /* FIFO is empty. Blast it full. */
591 const int n = left < fifo_depth ? left : fifo_depth;
592 outsb(fifo, bufp, n);
593 bufp += n;
594 left -= n;
595
596 /* Adjust the poll time. */
597 if (i < (poll_for - 2))
598 poll_for--;
599 continue;
600 } else if (i++ < poll_for) {
601 udelay(10);
602 ecrval = inb(ECONTROL(port));
603 goto poll;
604 }
605
606 /* Half-full(call me an optimist) */
607 byte = *bufp++;
608 outb(byte, fifo);
609 left--;
610 }
611 dump_parport_state("leave fifo_write_block_pio", port);
612 return length - left;
613 }
614
615 #ifdef HAS_DMA
616 static size_t parport_pc_fifo_write_block_dma(struct parport *port,
617 const void *buf, size_t length)
618 {
619 int ret = 0;
620 unsigned long dmaflag;
621 size_t left = length;
622 const struct parport_pc_private *priv = port->physport->private_data;
623 struct device *dev = port->physport->dev;
624 dma_addr_t dma_addr, dma_handle;
625 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
626 unsigned long start = (unsigned long) buf;
627 unsigned long end = (unsigned long) buf + length - 1;
628
629 dump_parport_state("enter fifo_write_block_dma", port);
630 if (end < MAX_DMA_ADDRESS) {
631 /* If it would cross a 64k boundary, cap it at the end. */
632 if ((start ^ end) & ~0xffffUL)
633 maxlen = 0x10000 - (start & 0xffff);
634
635 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
636 DMA_TO_DEVICE);
637 } else {
638 /* above 16 MB we use a bounce buffer as ISA-DMA
639 is not possible */
640 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
641 dma_addr = priv->dma_handle;
642 dma_handle = 0;
643 }
644
645 port = port->physport;
646
647 /* We don't want to be interrupted every character. */
648 parport_pc_disable_irq(port);
649 /* set nErrIntrEn and serviceIntr */
650 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
651
652 /* Forward mode. */
653 parport_pc_data_forward(port); /* Must be in PS2 mode */
654
655 while (left) {
656 unsigned long expire = jiffies + port->physport->cad->timeout;
657
658 size_t count = left;
659
660 if (count > maxlen)
661 count = maxlen;
662
663 if (!dma_handle) /* bounce buffer ! */
664 memcpy(priv->dma_buf, buf, count);
665
666 dmaflag = claim_dma_lock();
667 disable_dma(port->dma);
668 clear_dma_ff(port->dma);
669 set_dma_mode(port->dma, DMA_MODE_WRITE);
670 set_dma_addr(port->dma, dma_addr);
671 set_dma_count(port->dma, count);
672
673 /* Set DMA mode */
674 frob_econtrol(port, 1<<3, 1<<3);
675
676 /* Clear serviceIntr */
677 frob_econtrol(port, 1<<2, 0);
678
679 enable_dma(port->dma);
680 release_dma_lock(dmaflag);
681
682 /* assume DMA will be successful */
683 left -= count;
684 buf += count;
685 if (dma_handle)
686 dma_addr += count;
687
688 /* Wait for interrupt. */
689 false_alarm:
690 ret = parport_wait_event(port, HZ);
691 if (ret < 0)
692 break;
693 ret = 0;
694 if (!time_before(jiffies, expire)) {
695 /* Timed out. */
696 printk(KERN_DEBUG "DMA write timed out\n");
697 break;
698 }
699 /* Is serviceIntr set? */
700 if (!(inb(ECONTROL(port)) & (1<<2))) {
701 cond_resched();
702
703 goto false_alarm;
704 }
705
706 dmaflag = claim_dma_lock();
707 disable_dma(port->dma);
708 clear_dma_ff(port->dma);
709 count = get_dma_residue(port->dma);
710 release_dma_lock(dmaflag);
711
712 cond_resched(); /* Can't yield the port. */
713
714 /* Anyone else waiting for the port? */
715 if (port->waithead) {
716 printk(KERN_DEBUG "Somebody wants the port\n");
717 break;
718 }
719
720 /* update for possible DMA residue ! */
721 buf -= count;
722 left += count;
723 if (dma_handle)
724 dma_addr -= count;
725 }
726
727 /* Maybe got here through break, so adjust for DMA residue! */
728 dmaflag = claim_dma_lock();
729 disable_dma(port->dma);
730 clear_dma_ff(port->dma);
731 left += get_dma_residue(port->dma);
732 release_dma_lock(dmaflag);
733
734 /* Turn off DMA mode */
735 frob_econtrol(port, 1<<3, 0);
736
737 if (dma_handle)
738 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
739
740 dump_parport_state("leave fifo_write_block_dma", port);
741 return length - left;
742 }
743 #endif
744
745 static inline size_t parport_pc_fifo_write_block(struct parport *port,
746 const void *buf, size_t length)
747 {
748 #ifdef HAS_DMA
749 if (port->dma != PARPORT_DMA_NONE)
750 return parport_pc_fifo_write_block_dma(port, buf, length);
751 #endif
752 return parport_pc_fifo_write_block_pio(port, buf, length);
753 }
754
755 /* Parallel Port FIFO mode (ECP chipsets) */
756 static size_t parport_pc_compat_write_block_pio(struct parport *port,
757 const void *buf, size_t length,
758 int flags)
759 {
760 size_t written;
761 int r;
762 unsigned long expire;
763 const struct parport_pc_private *priv = port->physport->private_data;
764
765 /* Special case: a timeout of zero means we cannot call schedule().
766 * Also if O_NONBLOCK is set then use the default implementation. */
767 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
768 return parport_ieee1284_write_compat(port, buf,
769 length, flags);
770
771 /* Set up parallel port FIFO mode.*/
772 parport_pc_data_forward(port); /* Must be in PS2 mode */
773 parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0);
774 r = change_mode(port, ECR_PPF); /* Parallel port FIFO */
775 if (r)
776 printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
777 port->name);
778
779 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
780
781 /* Write the data to the FIFO. */
782 written = parport_pc_fifo_write_block(port, buf, length);
783
784 /* Finish up. */
785 /* For some hardware we don't want to touch the mode until
786 * the FIFO is empty, so allow 4 seconds for each position
787 * in the fifo.
788 */
789 expire = jiffies + (priv->fifo_depth * HZ * 4);
790 do {
791 /* Wait for the FIFO to empty */
792 r = change_mode(port, ECR_PS2);
793 if (r != -EBUSY)
794 break;
795 } while (time_before(jiffies, expire));
796 if (r == -EBUSY) {
797
798 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
799
800 /* Prevent further data transfer. */
801 frob_set_mode(port, ECR_TST);
802
803 /* Adjust for the contents of the FIFO. */
804 for (written -= priv->fifo_depth; ; written++) {
805 if (inb(ECONTROL(port)) & 0x2) {
806 /* Full up. */
807 break;
808 }
809 outb(0, FIFO(port));
810 }
811
812 /* Reset the FIFO and return to PS2 mode. */
813 frob_set_mode(port, ECR_PS2);
814 }
815
816 r = parport_wait_peripheral(port,
817 PARPORT_STATUS_BUSY,
818 PARPORT_STATUS_BUSY);
819 if (r)
820 printk(KERN_DEBUG
821 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
822 port->name, r);
823
824 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
825
826 return written;
827 }
828
829 /* ECP */
830 #ifdef CONFIG_PARPORT_1284
831 static size_t parport_pc_ecp_write_block_pio(struct parport *port,
832 const void *buf, size_t length,
833 int flags)
834 {
835 size_t written;
836 int r;
837 unsigned long expire;
838 const struct parport_pc_private *priv = port->physport->private_data;
839
840 /* Special case: a timeout of zero means we cannot call schedule().
841 * Also if O_NONBLOCK is set then use the default implementation. */
842 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
843 return parport_ieee1284_ecp_write_data(port, buf,
844 length, flags);
845
846 /* Switch to forward mode if necessary. */
847 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
848 /* Event 47: Set nInit high. */
849 parport_frob_control(port,
850 PARPORT_CONTROL_INIT
851 | PARPORT_CONTROL_AUTOFD,
852 PARPORT_CONTROL_INIT
853 | PARPORT_CONTROL_AUTOFD);
854
855 /* Event 49: PError goes high. */
856 r = parport_wait_peripheral(port,
857 PARPORT_STATUS_PAPEROUT,
858 PARPORT_STATUS_PAPEROUT);
859 if (r) {
860 printk(KERN_DEBUG "%s: PError timeout (%d) "
861 "in ecp_write_block_pio\n", port->name, r);
862 }
863 }
864
865 /* Set up ECP parallel port mode.*/
866 parport_pc_data_forward(port); /* Must be in PS2 mode */
867 parport_pc_frob_control(port,
868 PARPORT_CONTROL_STROBE |
869 PARPORT_CONTROL_AUTOFD,
870 0);
871 r = change_mode(port, ECR_ECP); /* ECP FIFO */
872 if (r)
873 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
874 port->name);
875 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
876
877 /* Write the data to the FIFO. */
878 written = parport_pc_fifo_write_block(port, buf, length);
879
880 /* Finish up. */
881 /* For some hardware we don't want to touch the mode until
882 * the FIFO is empty, so allow 4 seconds for each position
883 * in the fifo.
884 */
885 expire = jiffies + (priv->fifo_depth * (HZ * 4));
886 do {
887 /* Wait for the FIFO to empty */
888 r = change_mode(port, ECR_PS2);
889 if (r != -EBUSY)
890 break;
891 } while (time_before(jiffies, expire));
892 if (r == -EBUSY) {
893
894 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
895
896 /* Prevent further data transfer. */
897 frob_set_mode(port, ECR_TST);
898
899 /* Adjust for the contents of the FIFO. */
900 for (written -= priv->fifo_depth; ; written++) {
901 if (inb(ECONTROL(port)) & 0x2) {
902 /* Full up. */
903 break;
904 }
905 outb(0, FIFO(port));
906 }
907
908 /* Reset the FIFO and return to PS2 mode. */
909 frob_set_mode(port, ECR_PS2);
910
911 /* Host transfer recovery. */
912 parport_pc_data_reverse(port); /* Must be in PS2 mode */
913 udelay(5);
914 parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
915 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
916 if (r)
917 printk(KERN_DEBUG "%s: PE,1 timeout (%d) "
918 "in ecp_write_block_pio\n", port->name, r);
919
920 parport_frob_control(port,
921 PARPORT_CONTROL_INIT,
922 PARPORT_CONTROL_INIT);
923 r = parport_wait_peripheral(port,
924 PARPORT_STATUS_PAPEROUT,
925 PARPORT_STATUS_PAPEROUT);
926 if (r)
927 printk(KERN_DEBUG "%s: PE,2 timeout (%d) "
928 "in ecp_write_block_pio\n", port->name, r);
929 }
930
931 r = parport_wait_peripheral(port,
932 PARPORT_STATUS_BUSY,
933 PARPORT_STATUS_BUSY);
934 if (r)
935 printk(KERN_DEBUG
936 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
937 port->name, r);
938
939 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
940
941 return written;
942 }
943
944 #if 0
945 static size_t parport_pc_ecp_read_block_pio(struct parport *port,
946 void *buf, size_t length,
947 int flags)
948 {
949 size_t left = length;
950 size_t fifofull;
951 int r;
952 const int fifo = FIFO(port);
953 const struct parport_pc_private *priv = port->physport->private_data;
954 const int fifo_depth = priv->fifo_depth;
955 char *bufp = buf;
956
957 port = port->physport;
958 DPRINTK(KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n");
959 dump_parport_state("enter fcn", port);
960
961 /* Special case: a timeout of zero means we cannot call schedule().
962 * Also if O_NONBLOCK is set then use the default implementation. */
963 if (port->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
964 return parport_ieee1284_ecp_read_data(port, buf,
965 length, flags);
966
967 if (port->ieee1284.mode == IEEE1284_MODE_ECPRLE) {
968 /* If the peripheral is allowed to send RLE compressed
969 * data, it is possible for a byte to expand to 128
970 * bytes in the FIFO. */
971 fifofull = 128;
972 } else {
973 fifofull = fifo_depth;
974 }
975
976 /* If the caller wants less than a full FIFO's worth of data,
977 * go through software emulation. Otherwise we may have to throw
978 * away data. */
979 if (length < fifofull)
980 return parport_ieee1284_ecp_read_data(port, buf,
981 length, flags);
982
983 if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE) {
984 /* change to reverse-idle phase (must be in forward-idle) */
985
986 /* Event 38: Set nAutoFd low (also make sure nStrobe is high) */
987 parport_frob_control(port,
988 PARPORT_CONTROL_AUTOFD
989 | PARPORT_CONTROL_STROBE,
990 PARPORT_CONTROL_AUTOFD);
991 parport_pc_data_reverse(port); /* Must be in PS2 mode */
992 udelay(5);
993 /* Event 39: Set nInit low to initiate bus reversal */
994 parport_frob_control(port,
995 PARPORT_CONTROL_INIT,
996 0);
997 /* Event 40: Wait for nAckReverse (PError) to go low */
998 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
999 if (r) {
1000 printk(KERN_DEBUG "%s: PE timeout Event 40 (%d) "
1001 "in ecp_read_block_pio\n", port->name, r);
1002 return 0;
1003 }
1004 }
1005
1006 /* Set up ECP FIFO mode.*/
1007 /* parport_pc_frob_control(port,
1008 PARPORT_CONTROL_STROBE |
1009 PARPORT_CONTROL_AUTOFD,
1010 PARPORT_CONTROL_AUTOFD); */
1011 r = change_mode(port, ECR_ECP); /* ECP FIFO */
1012 if (r)
1013 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
1014 port->name);
1015
1016 port->ieee1284.phase = IEEE1284_PH_REV_DATA;
1017
1018 /* the first byte must be collected manually */
1019 dump_parport_state("pre 43", port);
1020 /* Event 43: Wait for nAck to go low */
1021 r = parport_wait_peripheral(port, PARPORT_STATUS_ACK, 0);
1022 if (r) {
1023 /* timed out while reading -- no data */
1024 printk(KERN_DEBUG "PIO read timed out (initial byte)\n");
1025 goto out_no_data;
1026 }
1027 /* read byte */
1028 *bufp++ = inb(DATA(port));
1029 left--;
1030 dump_parport_state("43-44", port);
1031 /* Event 44: nAutoFd (HostAck) goes high to acknowledge */
1032 parport_pc_frob_control(port,
1033 PARPORT_CONTROL_AUTOFD,
1034 0);
1035 dump_parport_state("pre 45", port);
1036 /* Event 45: Wait for nAck to go high */
1037 /* r = parport_wait_peripheral(port, PARPORT_STATUS_ACK,
1038 PARPORT_STATUS_ACK); */
1039 dump_parport_state("post 45", port);
1040 r = 0;
1041 if (r) {
1042 /* timed out while waiting for peripheral to respond to ack */
1043 printk(KERN_DEBUG "ECP PIO read timed out (waiting for nAck)\n");
1044
1045 /* keep hold of the byte we've got already */
1046 goto out_no_data;
1047 }
1048 /* Event 46: nAutoFd (HostAck) goes low to accept more data */
1049 parport_pc_frob_control(port,
1050 PARPORT_CONTROL_AUTOFD,
1051 PARPORT_CONTROL_AUTOFD);
1052
1053
1054 dump_parport_state("rev idle", port);
1055 /* Do the transfer. */
1056 while (left > fifofull) {
1057 int ret;
1058 unsigned long expire = jiffies + port->cad->timeout;
1059 unsigned char ecrval = inb(ECONTROL(port));
1060
1061 if (need_resched() && time_before(jiffies, expire))
1062 /* Can't yield the port. */
1063 schedule();
1064
1065 /* At this point, the FIFO may already be full. In
1066 * that case ECP is already holding back the
1067 * peripheral (assuming proper design) with a delayed
1068 * handshake. Work fast to avoid a peripheral
1069 * timeout. */
1070
1071 if (ecrval & 0x01) {
1072 /* FIFO is empty. Wait for interrupt. */
1073 dump_parport_state("FIFO empty", port);
1074
1075 /* Anyone else waiting for the port? */
1076 if (port->waithead) {
1077 printk(KERN_DEBUG "Somebody wants the port\n");
1078 break;
1079 }
1080
1081 /* Clear serviceIntr */
1082 ECR_WRITE(port, ecrval & ~(1<<2));
1083 false_alarm:
1084 dump_parport_state("waiting", port);
1085 ret = parport_wait_event(port, HZ);
1086 DPRINTK(KERN_DEBUG "parport_wait_event returned %d\n",
1087 ret);
1088 if (ret < 0)
1089 break;
1090 ret = 0;
1091 if (!time_before(jiffies, expire)) {
1092 /* Timed out. */
1093 dump_parport_state("timeout", port);
1094 printk(KERN_DEBUG "PIO read timed out\n");
1095 break;
1096 }
1097 ecrval = inb(ECONTROL(port));
1098 if (!(ecrval & (1<<2))) {
1099 if (need_resched() &&
1100 time_before(jiffies, expire)) {
1101 schedule();
1102 }
1103 goto false_alarm;
1104 }
1105
1106 /* Depending on how the FIFO threshold was
1107 * set, how long interrupt service took, and
1108 * how fast the peripheral is, we might be
1109 * lucky and have a just filled FIFO. */
1110 continue;
1111 }
1112
1113 if (ecrval & 0x02) {
1114 /* FIFO is full. */
1115 dump_parport_state("FIFO full", port);
1116 insb(fifo, bufp, fifo_depth);
1117 bufp += fifo_depth;
1118 left -= fifo_depth;
1119 continue;
1120 }
1121
1122 DPRINTK(KERN_DEBUG
1123 "*** ecp_read_block_pio: reading one byte from the FIFO\n");
1124
1125 /* FIFO not filled. We will cycle this loop for a while
1126 * and either the peripheral will fill it faster,
1127 * tripping a fast empty with insb, or we empty it. */
1128 *bufp++ = inb(fifo);
1129 left--;
1130 }
1131
1132 /* scoop up anything left in the FIFO */
1133 while (left && !(inb(ECONTROL(port) & 0x01))) {
1134 *bufp++ = inb(fifo);
1135 left--;
1136 }
1137
1138 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
1139 dump_parport_state("rev idle2", port);
1140
1141 out_no_data:
1142
1143 /* Go to forward idle mode to shut the peripheral up (event 47). */
1144 parport_frob_control(port, PARPORT_CONTROL_INIT, PARPORT_CONTROL_INIT);
1145
1146 /* event 49: PError goes high */
1147 r = parport_wait_peripheral(port,
1148 PARPORT_STATUS_PAPEROUT,
1149 PARPORT_STATUS_PAPEROUT);
1150 if (r) {
1151 printk(KERN_DEBUG
1152 "%s: PE timeout FWDIDLE (%d) in ecp_read_block_pio\n",
1153 port->name, r);
1154 }
1155
1156 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
1157
1158 /* Finish up. */
1159 {
1160 int lost = get_fifo_residue(port);
1161 if (lost)
1162 /* Shouldn't happen with compliant peripherals. */
1163 printk(KERN_DEBUG "%s: DATA LOSS (%d bytes)!\n",
1164 port->name, lost);
1165 }
1166
1167 dump_parport_state("fwd idle", port);
1168 return length - left;
1169 }
1170 #endif /* 0 */
1171 #endif /* IEEE 1284 support */
1172 #endif /* Allowed to use FIFO/DMA */
1173
1174
1175 /*
1176 * ******************************************
1177 * INITIALISATION AND MODULE STUFF BELOW HERE
1178 * ******************************************
1179 */
1180
1181 /* GCC is not inlining extern inline function later overwriten to non-inline,
1182 so we use outlined_ variants here. */
1183 static const struct parport_operations parport_pc_ops = {
1184 .write_data = parport_pc_write_data,
1185 .read_data = parport_pc_read_data,
1186
1187 .write_control = parport_pc_write_control,
1188 .read_control = parport_pc_read_control,
1189 .frob_control = parport_pc_frob_control,
1190
1191 .read_status = parport_pc_read_status,
1192
1193 .enable_irq = parport_pc_enable_irq,
1194 .disable_irq = parport_pc_disable_irq,
1195
1196 .data_forward = parport_pc_data_forward,
1197 .data_reverse = parport_pc_data_reverse,
1198
1199 .init_state = parport_pc_init_state,
1200 .save_state = parport_pc_save_state,
1201 .restore_state = parport_pc_restore_state,
1202
1203 .epp_write_data = parport_ieee1284_epp_write_data,
1204 .epp_read_data = parport_ieee1284_epp_read_data,
1205 .epp_write_addr = parport_ieee1284_epp_write_addr,
1206 .epp_read_addr = parport_ieee1284_epp_read_addr,
1207
1208 .ecp_write_data = parport_ieee1284_ecp_write_data,
1209 .ecp_read_data = parport_ieee1284_ecp_read_data,
1210 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
1211
1212 .compat_write_data = parport_ieee1284_write_compat,
1213 .nibble_read_data = parport_ieee1284_read_nibble,
1214 .byte_read_data = parport_ieee1284_read_byte,
1215
1216 .owner = THIS_MODULE,
1217 };
1218
1219 #ifdef CONFIG_PARPORT_PC_SUPERIO
1220
1221 static struct superio_struct *find_free_superio(void)
1222 {
1223 int i;
1224 for (i = 0; i < NR_SUPERIOS; i++)
1225 if (superios[i].io == 0)
1226 return &superios[i];
1227 return NULL;
1228 }
1229
1230
1231 /* Super-IO chipset detection, Winbond, SMSC */
1232 static void __devinit show_parconfig_smsc37c669(int io, int key)
1233 {
1234 int cr1, cr4, cra, cr23, cr26, cr27;
1235 struct superio_struct *s;
1236
1237 static const char *const modes[] = {
1238 "SPP and Bidirectional (PS/2)",
1239 "EPP and SPP",
1240 "ECP",
1241 "ECP and EPP" };
1242
1243 outb(key, io);
1244 outb(key, io);
1245 outb(1, io);
1246 cr1 = inb(io + 1);
1247 outb(4, io);
1248 cr4 = inb(io + 1);
1249 outb(0x0a, io);
1250 cra = inb(io + 1);
1251 outb(0x23, io);
1252 cr23 = inb(io + 1);
1253 outb(0x26, io);
1254 cr26 = inb(io + 1);
1255 outb(0x27, io);
1256 cr27 = inb(io + 1);
1257 outb(0xaa, io);
1258
1259 if (verbose_probing) {
1260 printk(KERN_INFO
1261 "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
1262 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
1263 cr1, cr4, cra, cr23, cr26, cr27);
1264
1265 /* The documentation calls DMA and IRQ-Lines by letters, so
1266 the board maker can/will wire them
1267 appropriately/randomly... G=reserved H=IDE-irq, */
1268 printk(KERN_INFO
1269 "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n",
1270 cr23 * 4,
1271 (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
1272 (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-',
1273 cra & 0x0f);
1274 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
1275 (cr23 * 4 >= 0x100) ? "yes" : "no",
1276 (cr1 & 4) ? "yes" : "no");
1277 printk(KERN_INFO
1278 "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1279 (cr1 & 0x08) ? "Standard mode only (SPP)"
1280 : modes[cr4 & 0x03],
1281 (cr4 & 0x40) ? "1.7" : "1.9");
1282 }
1283
1284 /* Heuristics ! BIOS setup for this mainboard device limits
1285 the choices to standard settings, i.e. io-address and IRQ
1286 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1287 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1288 if (cr23 * 4 >= 0x100) { /* if active */
1289 s = find_free_superio();
1290 if (s == NULL)
1291 printk(KERN_INFO "Super-IO: too many chips!\n");
1292 else {
1293 int d;
1294 switch (cr23 * 4) {
1295 case 0x3bc:
1296 s->io = 0x3bc;
1297 s->irq = 7;
1298 break;
1299 case 0x378:
1300 s->io = 0x378;
1301 s->irq = 7;
1302 break;
1303 case 0x278:
1304 s->io = 0x278;
1305 s->irq = 5;
1306 }
1307 d = (cr26 & 0x0f);
1308 if (d == 1 || d == 3)
1309 s->dma = d;
1310 else
1311 s->dma = PARPORT_DMA_NONE;
1312 }
1313 }
1314 }
1315
1316
1317 static void __devinit show_parconfig_winbond(int io, int key)
1318 {
1319 int cr30, cr60, cr61, cr70, cr74, crf0;
1320 struct superio_struct *s;
1321 static const char *const modes[] = {
1322 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1323 "EPP-1.9 and SPP",
1324 "ECP",
1325 "ECP and EPP-1.9",
1326 "Standard (SPP)",
1327 "EPP-1.7 and SPP", /* 5 */
1328 "undefined!",
1329 "ECP and EPP-1.7" };
1330 static char *const irqtypes[] = {
1331 "pulsed low, high-Z",
1332 "follows nACK" };
1333
1334 /* The registers are called compatible-PnP because the
1335 register layout is modelled after ISA-PnP, the access
1336 method is just another ... */
1337 outb(key, io);
1338 outb(key, io);
1339 outb(0x07, io); /* Register 7: Select Logical Device */
1340 outb(0x01, io + 1); /* LD1 is Parallel Port */
1341 outb(0x30, io);
1342 cr30 = inb(io + 1);
1343 outb(0x60, io);
1344 cr60 = inb(io + 1);
1345 outb(0x61, io);
1346 cr61 = inb(io + 1);
1347 outb(0x70, io);
1348 cr70 = inb(io + 1);
1349 outb(0x74, io);
1350 cr74 = inb(io + 1);
1351 outb(0xf0, io);
1352 crf0 = inb(io + 1);
1353 outb(0xaa, io);
1354
1355 if (verbose_probing) {
1356 printk(KERN_INFO
1357 "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n",
1358 cr30, cr60, cr61, cr70, cr74, crf0);
1359 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1360 (cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f);
1361 if ((cr74 & 0x07) > 3)
1362 printk("dma=none\n");
1363 else
1364 printk("dma=%d\n", cr74 & 0x07);
1365 printk(KERN_INFO
1366 "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1367 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1368 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n",
1369 modes[crf0 & 0x07]);
1370 }
1371
1372 if (cr30 & 0x01) { /* the settings can be interrogated later ... */
1373 s = find_free_superio();
1374 if (s == NULL)
1375 printk(KERN_INFO "Super-IO: too many chips!\n");
1376 else {
1377 s->io = (cr60 << 8) | cr61;
1378 s->irq = cr70 & 0x0f;
1379 s->dma = (((cr74 & 0x07) > 3) ?
1380 PARPORT_DMA_NONE : (cr74 & 0x07));
1381 }
1382 }
1383 }
1384
1385 static void __devinit decode_winbond(int efer, int key, int devid,
1386 int devrev, int oldid)
1387 {
1388 const char *type = "unknown";
1389 int id, progif = 2;
1390
1391 if (devid == devrev)
1392 /* simple heuristics, we happened to read some
1393 non-winbond register */
1394 return;
1395
1396 id = (devid << 8) | devrev;
1397
1398 /* Values are from public data sheets pdf files, I can just
1399 confirm 83977TF is correct :-) */
1400 if (id == 0x9771)
1401 type = "83977F/AF";
1402 else if (id == 0x9773)
1403 type = "83977TF / SMSC 97w33x/97w34x";
1404 else if (id == 0x9774)
1405 type = "83977ATF";
1406 else if ((id & ~0x0f) == 0x5270)
1407 type = "83977CTF / SMSC 97w36x";
1408 else if ((id & ~0x0f) == 0x52f0)
1409 type = "83977EF / SMSC 97w35x";
1410 else if ((id & ~0x0f) == 0x5210)
1411 type = "83627";
1412 else if ((id & ~0x0f) == 0x6010)
1413 type = "83697HF";
1414 else if ((oldid & 0x0f) == 0x0a) {
1415 type = "83877F";
1416 progif = 1;
1417 } else if ((oldid & 0x0f) == 0x0b) {
1418 type = "83877AF";
1419 progif = 1;
1420 } else if ((oldid & 0x0f) == 0x0c) {
1421 type = "83877TF";
1422 progif = 1;
1423 } else if ((oldid & 0x0f) == 0x0d) {
1424 type = "83877ATF";
1425 progif = 1;
1426 } else
1427 progif = 0;
1428
1429 if (verbose_probing)
1430 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1431 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1432 efer, key, devid, devrev, oldid, type);
1433
1434 if (progif == 2)
1435 show_parconfig_winbond(efer, key);
1436 }
1437
1438 static void __devinit decode_smsc(int efer, int key, int devid, int devrev)
1439 {
1440 const char *type = "unknown";
1441 void (*func)(int io, int key);
1442 int id;
1443
1444 if (devid == devrev)
1445 /* simple heuristics, we happened to read some
1446 non-smsc register */
1447 return;
1448
1449 func = NULL;
1450 id = (devid << 8) | devrev;
1451
1452 if (id == 0x0302) {
1453 type = "37c669";
1454 func = show_parconfig_smsc37c669;
1455 } else if (id == 0x6582)
1456 type = "37c665IR";
1457 else if (devid == 0x65)
1458 type = "37c665GT";
1459 else if (devid == 0x66)
1460 type = "37c666GT";
1461
1462 if (verbose_probing)
1463 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1464 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1465 efer, key, devid, devrev, type);
1466
1467 if (func)
1468 func(efer, key);
1469 }
1470
1471
1472 static void __devinit winbond_check(int io, int key)
1473 {
1474 int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1475
1476 if (!request_region(io, 3, __func__))
1477 return;
1478
1479 origval = inb(io); /* Save original value */
1480
1481 /* First probe without key */
1482 outb(0x20, io);
1483 x_devid = inb(io + 1);
1484 outb(0x21, io);
1485 x_devrev = inb(io + 1);
1486 outb(0x09, io);
1487 x_oldid = inb(io + 1);
1488
1489 outb(key, io);
1490 outb(key, io); /* Write Magic Sequence to EFER, extended
1491 function enable register */
1492 outb(0x20, io); /* Write EFIR, extended function index register */
1493 devid = inb(io + 1); /* Read EFDR, extended function data register */
1494 outb(0x21, io);
1495 devrev = inb(io + 1);
1496 outb(0x09, io);
1497 oldid = inb(io + 1);
1498 outb(0xaa, io); /* Magic Seal */
1499
1500 outb(origval, io); /* in case we poked some entirely different hardware */
1501
1502 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1503 goto out; /* protection against false positives */
1504
1505 decode_winbond(io, key, devid, devrev, oldid);
1506 out:
1507 release_region(io, 3);
1508 }
1509
1510 static void __devinit winbond_check2(int io, int key)
1511 {
1512 int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1513
1514 if (!request_region(io, 3, __func__))
1515 return;
1516
1517 origval[0] = inb(io); /* Save original values */
1518 origval[1] = inb(io + 1);
1519 origval[2] = inb(io + 2);
1520
1521 /* First probe without the key */
1522 outb(0x20, io + 2);
1523 x_devid = inb(io + 2);
1524 outb(0x21, io + 1);
1525 x_devrev = inb(io + 2);
1526 outb(0x09, io + 1);
1527 x_oldid = inb(io + 2);
1528
1529 outb(key, io); /* Write Magic Byte to EFER, extended
1530 function enable register */
1531 outb(0x20, io + 2); /* Write EFIR, extended function index register */
1532 devid = inb(io + 2); /* Read EFDR, extended function data register */
1533 outb(0x21, io + 1);
1534 devrev = inb(io + 2);
1535 outb(0x09, io + 1);
1536 oldid = inb(io + 2);
1537 outb(0xaa, io); /* Magic Seal */
1538
1539 outb(origval[0], io); /* in case we poked some entirely different hardware */
1540 outb(origval[1], io + 1);
1541 outb(origval[2], io + 2);
1542
1543 if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
1544 goto out; /* protection against false positives */
1545
1546 decode_winbond(io, key, devid, devrev, oldid);
1547 out:
1548 release_region(io, 3);
1549 }
1550
1551 static void __devinit smsc_check(int io, int key)
1552 {
1553 int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
1554
1555 if (!request_region(io, 3, __func__))
1556 return;
1557
1558 origval = inb(io); /* Save original value */
1559
1560 /* First probe without the key */
1561 outb(0x0d, io);
1562 x_oldid = inb(io + 1);
1563 outb(0x0e, io);
1564 x_oldrev = inb(io + 1);
1565 outb(0x20, io);
1566 x_id = inb(io + 1);
1567 outb(0x21, io);
1568 x_rev = inb(io + 1);
1569
1570 outb(key, io);
1571 outb(key, io); /* Write Magic Sequence to EFER, extended
1572 function enable register */
1573 outb(0x0d, io); /* Write EFIR, extended function index register */
1574 oldid = inb(io + 1); /* Read EFDR, extended function data register */
1575 outb(0x0e, io);
1576 oldrev = inb(io + 1);
1577 outb(0x20, io);
1578 id = inb(io + 1);
1579 outb(0x21, io);
1580 rev = inb(io + 1);
1581 outb(0xaa, io); /* Magic Seal */
1582
1583 outb(origval, io); /* in case we poked some entirely different hardware */
1584
1585 if (x_id == id && x_oldrev == oldrev &&
1586 x_oldid == oldid && x_rev == rev)
1587 goto out; /* protection against false positives */
1588
1589 decode_smsc(io, key, oldid, oldrev);
1590 out:
1591 release_region(io, 3);
1592 }
1593
1594
1595 static void __devinit detect_and_report_winbond(void)
1596 {
1597 if (verbose_probing)
1598 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1599 winbond_check(0x3f0, 0x87);
1600 winbond_check(0x370, 0x87);
1601 winbond_check(0x2e , 0x87);
1602 winbond_check(0x4e , 0x87);
1603 winbond_check(0x3f0, 0x86);
1604 winbond_check2(0x250, 0x88);
1605 winbond_check2(0x250, 0x89);
1606 }
1607
1608 static void __devinit detect_and_report_smsc(void)
1609 {
1610 if (verbose_probing)
1611 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1612 smsc_check(0x3f0, 0x55);
1613 smsc_check(0x370, 0x55);
1614 smsc_check(0x3f0, 0x44);
1615 smsc_check(0x370, 0x44);
1616 }
1617
1618 static void __devinit detect_and_report_it87(void)
1619 {
1620 u16 dev;
1621 u8 origval, r;
1622 if (verbose_probing)
1623 printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
1624 if (!request_muxed_region(0x2e, 2, __func__))
1625 return;
1626 origval = inb(0x2e); /* Save original value */
1627 outb(0x87, 0x2e);
1628 outb(0x01, 0x2e);
1629 outb(0x55, 0x2e);
1630 outb(0x55, 0x2e);
1631 outb(0x20, 0x2e);
1632 dev = inb(0x2f) << 8;
1633 outb(0x21, 0x2e);
1634 dev |= inb(0x2f);
1635 if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 ||
1636 dev == 0x8716 || dev == 0x8718 || dev == 0x8726) {
1637 printk(KERN_INFO "IT%04X SuperIO detected.\n", dev);
1638 outb(0x07, 0x2E); /* Parallel Port */
1639 outb(0x03, 0x2F);
1640 outb(0xF0, 0x2E); /* BOOT 0x80 off */
1641 r = inb(0x2f);
1642 outb(0xF0, 0x2E);
1643 outb(r | 8, 0x2F);
1644 outb(0x02, 0x2E); /* Lock */
1645 outb(0x02, 0x2F);
1646 } else {
1647 outb(origval, 0x2e); /* Oops, sorry to disturb */
1648 }
1649 release_region(0x2e, 2);
1650 }
1651 #endif /* CONFIG_PARPORT_PC_SUPERIO */
1652
1653 static struct superio_struct *find_superio(struct parport *p)
1654 {
1655 int i;
1656 for (i = 0; i < NR_SUPERIOS; i++)
1657 if (superios[i].io != p->base)
1658 return &superios[i];
1659 return NULL;
1660 }
1661
1662 static int get_superio_dma(struct parport *p)
1663 {
1664 struct superio_struct *s = find_superio(p);
1665 if (s)
1666 return s->dma;
1667 return PARPORT_DMA_NONE;
1668 }
1669
1670 static int get_superio_irq(struct parport *p)
1671 {
1672 struct superio_struct *s = find_superio(p);
1673 if (s)
1674 return s->irq;
1675 return PARPORT_IRQ_NONE;
1676 }
1677
1678
1679 /* --- Mode detection ------------------------------------- */
1680
1681 /*
1682 * Checks for port existence, all ports support SPP MODE
1683 * Returns:
1684 * 0 : No parallel port at this address
1685 * PARPORT_MODE_PCSPP : SPP port detected
1686 * (if the user specified an ioport himself,
1687 * this shall always be the case!)
1688 *
1689 */
1690 static int parport_SPP_supported(struct parport *pb)
1691 {
1692 unsigned char r, w;
1693
1694 /*
1695 * first clear an eventually pending EPP timeout
1696 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1697 * that does not even respond to SPP cycles if an EPP
1698 * timeout is pending
1699 */
1700 clear_epp_timeout(pb);
1701
1702 /* Do a simple read-write test to make sure the port exists. */
1703 w = 0xc;
1704 outb(w, CONTROL(pb));
1705
1706 /* Is there a control register that we can read from? Some
1707 * ports don't allow reads, so read_control just returns a
1708 * software copy. Some ports _do_ allow reads, so bypass the
1709 * software copy here. In addition, some bits aren't
1710 * writable. */
1711 r = inb(CONTROL(pb));
1712 if ((r & 0xf) == w) {
1713 w = 0xe;
1714 outb(w, CONTROL(pb));
1715 r = inb(CONTROL(pb));
1716 outb(0xc, CONTROL(pb));
1717 if ((r & 0xf) == w)
1718 return PARPORT_MODE_PCSPP;
1719 }
1720
1721 if (user_specified)
1722 /* That didn't work, but the user thinks there's a
1723 * port here. */
1724 printk(KERN_INFO "parport 0x%lx (WARNING): CTR: "
1725 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1726
1727 /* Try the data register. The data lines aren't tri-stated at
1728 * this stage, so we expect back what we wrote. */
1729 w = 0xaa;
1730 parport_pc_write_data(pb, w);
1731 r = parport_pc_read_data(pb);
1732 if (r == w) {
1733 w = 0x55;
1734 parport_pc_write_data(pb, w);
1735 r = parport_pc_read_data(pb);
1736 if (r == w)
1737 return PARPORT_MODE_PCSPP;
1738 }
1739
1740 if (user_specified) {
1741 /* Didn't work, but the user is convinced this is the
1742 * place. */
1743 printk(KERN_INFO "parport 0x%lx (WARNING): DATA: "
1744 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1745 printk(KERN_INFO "parport 0x%lx: You gave this address, "
1746 "but there is probably no parallel port there!\n",
1747 pb->base);
1748 }
1749
1750 /* It's possible that we can't read the control register or
1751 * the data register. In that case just believe the user. */
1752 if (user_specified)
1753 return PARPORT_MODE_PCSPP;
1754
1755 return 0;
1756 }
1757
1758 /* Check for ECR
1759 *
1760 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1761 * on these cards actually accesses the CTR.
1762 *
1763 * Modern cards don't do this but reading from ECR will return 0xff
1764 * regardless of what is written here if the card does NOT support
1765 * ECP.
1766 *
1767 * We first check to see if ECR is the same as CTR. If not, the low
1768 * two bits of ECR aren't writable, so we check by writing ECR and
1769 * reading it back to see if it's what we expect.
1770 */
1771 static int parport_ECR_present(struct parport *pb)
1772 {
1773 struct parport_pc_private *priv = pb->private_data;
1774 unsigned char r = 0xc;
1775
1776 outb(r, CONTROL(pb));
1777 if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) {
1778 outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */
1779
1780 r = inb(CONTROL(pb));
1781 if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
1782 goto no_reg; /* Sure that no ECR register exists */
1783 }
1784
1785 if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
1786 goto no_reg;
1787
1788 ECR_WRITE(pb, 0x34);
1789 if (inb(ECONTROL(pb)) != 0x35)
1790 goto no_reg;
1791
1792 priv->ecr = 1;
1793 outb(0xc, CONTROL(pb));
1794
1795 /* Go to mode 000 */
1796 frob_set_mode(pb, ECR_SPP);
1797
1798 return 1;
1799
1800 no_reg:
1801 outb(0xc, CONTROL(pb));
1802 return 0;
1803 }
1804
1805 #ifdef CONFIG_PARPORT_1284
1806 /* Detect PS/2 support.
1807 *
1808 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1809 * allows us to read data from the data lines. In theory we would get back
1810 * 0xff but any peripheral attached to the port may drag some or all of the
1811 * lines down to zero. So if we get back anything that isn't the contents
1812 * of the data register we deem PS/2 support to be present.
1813 *
1814 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1815 * drivers, but an external peripheral with sufficiently beefy drivers of
1816 * its own can overpower them and assert its own levels onto the bus, from
1817 * where they can then be read back as normal. Ports with this property
1818 * and the right type of device attached are likely to fail the SPP test,
1819 * (as they will appear to have stuck bits) and so the fact that they might
1820 * be misdetected here is rather academic.
1821 */
1822
1823 static int parport_PS2_supported(struct parport *pb)
1824 {
1825 int ok = 0;
1826
1827 clear_epp_timeout(pb);
1828
1829 /* try to tri-state the buffer */
1830 parport_pc_data_reverse(pb);
1831
1832 parport_pc_write_data(pb, 0x55);
1833 if (parport_pc_read_data(pb) != 0x55)
1834 ok++;
1835
1836 parport_pc_write_data(pb, 0xaa);
1837 if (parport_pc_read_data(pb) != 0xaa)
1838 ok++;
1839
1840 /* cancel input mode */
1841 parport_pc_data_forward(pb);
1842
1843 if (ok) {
1844 pb->modes |= PARPORT_MODE_TRISTATE;
1845 } else {
1846 struct parport_pc_private *priv = pb->private_data;
1847 priv->ctr_writable &= ~0x20;
1848 }
1849
1850 return ok;
1851 }
1852
1853 #ifdef CONFIG_PARPORT_PC_FIFO
1854 static int parport_ECP_supported(struct parport *pb)
1855 {
1856 int i;
1857 int config, configb;
1858 int pword;
1859 struct parport_pc_private *priv = pb->private_data;
1860 /* Translate ECP intrLine to ISA irq value */
1861 static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 };
1862
1863 /* If there is no ECR, we have no hope of supporting ECP. */
1864 if (!priv->ecr)
1865 return 0;
1866
1867 /* Find out FIFO depth */
1868 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1869 ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */
1870 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++)
1871 outb(0xaa, FIFO(pb));
1872
1873 /*
1874 * Using LGS chipset it uses ECR register, but
1875 * it doesn't support ECP or FIFO MODE
1876 */
1877 if (i == 1024) {
1878 ECR_WRITE(pb, ECR_SPP << 5);
1879 return 0;
1880 }
1881
1882 priv->fifo_depth = i;
1883 if (verbose_probing)
1884 printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1885
1886 /* Find out writeIntrThreshold */
1887 frob_econtrol(pb, 1<<2, 1<<2);
1888 frob_econtrol(pb, 1<<2, 0);
1889 for (i = 1; i <= priv->fifo_depth; i++) {
1890 inb(FIFO(pb));
1891 udelay(50);
1892 if (inb(ECONTROL(pb)) & (1<<2))
1893 break;
1894 }
1895
1896 if (i <= priv->fifo_depth) {
1897 if (verbose_probing)
1898 printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1899 pb->base, i);
1900 } else
1901 /* Number of bytes we know we can write if we get an
1902 interrupt. */
1903 i = 0;
1904
1905 priv->writeIntrThreshold = i;
1906
1907 /* Find out readIntrThreshold */
1908 frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1909 parport_pc_data_reverse(pb); /* Must be in PS2 mode */
1910 frob_set_mode(pb, ECR_TST); /* Test FIFO */
1911 frob_econtrol(pb, 1<<2, 1<<2);
1912 frob_econtrol(pb, 1<<2, 0);
1913 for (i = 1; i <= priv->fifo_depth; i++) {
1914 outb(0xaa, FIFO(pb));
1915 if (inb(ECONTROL(pb)) & (1<<2))
1916 break;
1917 }
1918
1919 if (i <= priv->fifo_depth) {
1920 if (verbose_probing)
1921 printk(KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1922 pb->base, i);
1923 } else
1924 /* Number of bytes we can read if we get an interrupt. */
1925 i = 0;
1926
1927 priv->readIntrThreshold = i;
1928
1929 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1930 ECR_WRITE(pb, 0xf4); /* Configuration mode */
1931 config = inb(CONFIGA(pb));
1932 pword = (config >> 4) & 0x7;
1933 switch (pword) {
1934 case 0:
1935 pword = 2;
1936 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1937 pb->base);
1938 break;
1939 case 2:
1940 pword = 4;
1941 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1942 pb->base);
1943 break;
1944 default:
1945 printk(KERN_WARNING "0x%lx: Unknown implementation ID\n",
1946 pb->base);
1947 /* Assume 1 */
1948 case 1:
1949 pword = 1;
1950 }
1951 priv->pword = pword;
1952
1953 if (verbose_probing) {
1954 printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
1955 pb->base, 8 * pword);
1956
1957 printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1958 config & 0x80 ? "Level" : "Pulses");
1959
1960 configb = inb(CONFIGB(pb));
1961 printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1962 pb->base, config, configb);
1963 printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1964 if ((configb >> 3) & 0x07)
1965 printk("%d", intrline[(configb >> 3) & 0x07]);
1966 else
1967 printk("<none or set by other means>");
1968 printk(" dma=");
1969 if ((configb & 0x03) == 0x00)
1970 printk("<none or set by other means>\n");
1971 else
1972 printk("%d\n", configb & 0x07);
1973 }
1974
1975 /* Go back to mode 000 */
1976 frob_set_mode(pb, ECR_SPP);
1977
1978 return 1;
1979 }
1980 #endif
1981
1982 static int parport_ECPPS2_supported(struct parport *pb)
1983 {
1984 const struct parport_pc_private *priv = pb->private_data;
1985 int result;
1986 unsigned char oecr;
1987
1988 if (!priv->ecr)
1989 return 0;
1990
1991 oecr = inb(ECONTROL(pb));
1992 ECR_WRITE(pb, ECR_PS2 << 5);
1993 result = parport_PS2_supported(pb);
1994 ECR_WRITE(pb, oecr);
1995 return result;
1996 }
1997
1998 /* EPP mode detection */
1999
2000 static int parport_EPP_supported(struct parport *pb)
2001 {
2002 const struct parport_pc_private *priv = pb->private_data;
2003
2004 /*
2005 * Theory:
2006 * Bit 0 of STR is the EPP timeout bit, this bit is 0
2007 * when EPP is possible and is set high when an EPP timeout
2008 * occurs (EPP uses the HALT line to stop the CPU while it does
2009 * the byte transfer, an EPP timeout occurs if the attached
2010 * device fails to respond after 10 micro seconds).
2011 *
2012 * This bit is cleared by either reading it (National Semi)
2013 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
2014 * This bit is always high in non EPP modes.
2015 */
2016
2017 /* If EPP timeout bit clear then EPP available */
2018 if (!clear_epp_timeout(pb))
2019 return 0; /* No way to clear timeout */
2020
2021 /* Check for Intel bug. */
2022 if (priv->ecr) {
2023 unsigned char i;
2024 for (i = 0x00; i < 0x80; i += 0x20) {
2025 ECR_WRITE(pb, i);
2026 if (clear_epp_timeout(pb)) {
2027 /* Phony EPP in ECP. */
2028 return 0;
2029 }
2030 }
2031 }
2032
2033 pb->modes |= PARPORT_MODE_EPP;
2034
2035 /* Set up access functions to use EPP hardware. */
2036 pb->ops->epp_read_data = parport_pc_epp_read_data;
2037 pb->ops->epp_write_data = parport_pc_epp_write_data;
2038 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
2039 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
2040
2041 return 1;
2042 }
2043
2044 static int parport_ECPEPP_supported(struct parport *pb)
2045 {
2046 struct parport_pc_private *priv = pb->private_data;
2047 int result;
2048 unsigned char oecr;
2049
2050 if (!priv->ecr)
2051 return 0;
2052
2053 oecr = inb(ECONTROL(pb));
2054 /* Search for SMC style EPP+ECP mode */
2055 ECR_WRITE(pb, 0x80);
2056 outb(0x04, CONTROL(pb));
2057 result = parport_EPP_supported(pb);
2058
2059 ECR_WRITE(pb, oecr);
2060
2061 if (result) {
2062 /* Set up access functions to use ECP+EPP hardware. */
2063 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
2064 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
2065 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
2066 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
2067 }
2068
2069 return result;
2070 }
2071
2072 #else /* No IEEE 1284 support */
2073
2074 /* Don't bother probing for modes we know we won't use. */
2075 static int __devinit parport_PS2_supported(struct parport *pb) { return 0; }
2076 #ifdef CONFIG_PARPORT_PC_FIFO
2077 static int parport_ECP_supported(struct parport *pb)
2078 {
2079 return 0;
2080 }
2081 #endif
2082 static int __devinit parport_EPP_supported(struct parport *pb)
2083 {
2084 return 0;
2085 }
2086
2087 static int __devinit parport_ECPEPP_supported(struct parport *pb)
2088 {
2089 return 0;
2090 }
2091
2092 static int __devinit parport_ECPPS2_supported(struct parport *pb)
2093 {
2094 return 0;
2095 }
2096
2097 #endif /* No IEEE 1284 support */
2098
2099 /* --- IRQ detection -------------------------------------- */
2100
2101 /* Only if supports ECP mode */
2102 static int programmable_irq_support(struct parport *pb)
2103 {
2104 int irq, intrLine;
2105 unsigned char oecr = inb(ECONTROL(pb));
2106 static const int lookup[8] = {
2107 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
2108 };
2109
2110 ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
2111
2112 intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
2113 irq = lookup[intrLine];
2114
2115 ECR_WRITE(pb, oecr);
2116 return irq;
2117 }
2118
2119 static int irq_probe_ECP(struct parport *pb)
2120 {
2121 int i;
2122 unsigned long irqs;
2123
2124 irqs = probe_irq_on();
2125
2126 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
2127 ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
2128 ECR_WRITE(pb, ECR_TST << 5);
2129
2130 /* If Full FIFO sure that writeIntrThreshold is generated */
2131 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++)
2132 outb(0xaa, FIFO(pb));
2133
2134 pb->irq = probe_irq_off(irqs);
2135 ECR_WRITE(pb, ECR_SPP << 5);
2136
2137 if (pb->irq <= 0)
2138 pb->irq = PARPORT_IRQ_NONE;
2139
2140 return pb->irq;
2141 }
2142
2143 /*
2144 * This detection seems that only works in National Semiconductors
2145 * This doesn't work in SMC, LGS, and Winbond
2146 */
2147 static int irq_probe_EPP(struct parport *pb)
2148 {
2149 #ifndef ADVANCED_DETECT
2150 return PARPORT_IRQ_NONE;
2151 #else
2152 int irqs;
2153 unsigned char oecr;
2154
2155 if (pb->modes & PARPORT_MODE_PCECR)
2156 oecr = inb(ECONTROL(pb));
2157
2158 irqs = probe_irq_on();
2159
2160 if (pb->modes & PARPORT_MODE_PCECR)
2161 frob_econtrol(pb, 0x10, 0x10);
2162
2163 clear_epp_timeout(pb);
2164 parport_pc_frob_control(pb, 0x20, 0x20);
2165 parport_pc_frob_control(pb, 0x10, 0x10);
2166 clear_epp_timeout(pb);
2167
2168 /* Device isn't expecting an EPP read
2169 * and generates an IRQ.
2170 */
2171 parport_pc_read_epp(pb);
2172 udelay(20);
2173
2174 pb->irq = probe_irq_off(irqs);
2175 if (pb->modes & PARPORT_MODE_PCECR)
2176 ECR_WRITE(pb, oecr);
2177 parport_pc_write_control(pb, 0xc);
2178
2179 if (pb->irq <= 0)
2180 pb->irq = PARPORT_IRQ_NONE;
2181
2182 return pb->irq;
2183 #endif /* Advanced detection */
2184 }
2185
2186 static int irq_probe_SPP(struct parport *pb)
2187 {
2188 /* Don't even try to do this. */
2189 return PARPORT_IRQ_NONE;
2190 }
2191
2192 /* We will attempt to share interrupt requests since other devices
2193 * such as sound cards and network cards seem to like using the
2194 * printer IRQs.
2195 *
2196 * When ECP is available we can autoprobe for IRQs.
2197 * NOTE: If we can autoprobe it, we can register the IRQ.
2198 */
2199 static int parport_irq_probe(struct parport *pb)
2200 {
2201 struct parport_pc_private *priv = pb->private_data;
2202
2203 if (priv->ecr) {
2204 pb->irq = programmable_irq_support(pb);
2205
2206 if (pb->irq == PARPORT_IRQ_NONE)
2207 pb->irq = irq_probe_ECP(pb);
2208 }
2209
2210 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
2211 (pb->modes & PARPORT_MODE_EPP))
2212 pb->irq = irq_probe_EPP(pb);
2213
2214 clear_epp_timeout(pb);
2215
2216 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
2217 pb->irq = irq_probe_EPP(pb);
2218
2219 clear_epp_timeout(pb);
2220
2221 if (pb->irq == PARPORT_IRQ_NONE)
2222 pb->irq = irq_probe_SPP(pb);
2223
2224 if (pb->irq == PARPORT_IRQ_NONE)
2225 pb->irq = get_superio_irq(pb);
2226
2227 return pb->irq;
2228 }
2229
2230 /* --- DMA detection -------------------------------------- */
2231
2232 /* Only if chipset conforms to ECP ISA Interface Standard */
2233 static int programmable_dma_support(struct parport *p)
2234 {
2235 unsigned char oecr = inb(ECONTROL(p));
2236 int dma;
2237
2238 frob_set_mode(p, ECR_CNF);
2239
2240 dma = inb(CONFIGB(p)) & 0x07;
2241 /* 000: Indicates jumpered 8-bit DMA if read-only.
2242 100: Indicates jumpered 16-bit DMA if read-only. */
2243 if ((dma & 0x03) == 0)
2244 dma = PARPORT_DMA_NONE;
2245
2246 ECR_WRITE(p, oecr);
2247 return dma;
2248 }
2249
2250 static int parport_dma_probe(struct parport *p)
2251 {
2252 const struct parport_pc_private *priv = p->private_data;
2253 if (priv->ecr) /* ask ECP chipset first */
2254 p->dma = programmable_dma_support(p);
2255 if (p->dma == PARPORT_DMA_NONE) {
2256 /* ask known Super-IO chips proper, although these
2257 claim ECP compatible, some don't report their DMA
2258 conforming to ECP standards */
2259 p->dma = get_superio_dma(p);
2260 }
2261
2262 return p->dma;
2263 }
2264
2265 /* --- Initialisation code -------------------------------- */
2266
2267 static LIST_HEAD(ports_list);
2268 static DEFINE_SPINLOCK(ports_lock);
2269
2270 struct parport *parport_pc_probe_port(unsigned long int base,
2271 unsigned long int base_hi,
2272 int irq, int dma,
2273 struct device *dev,
2274 int irqflags)
2275 {
2276 struct parport_pc_private *priv;
2277 struct parport_operations *ops;
2278 struct parport *p;
2279 int probedirq = PARPORT_IRQ_NONE;
2280 struct resource *base_res;
2281 struct resource *ECR_res = NULL;
2282 struct resource *EPP_res = NULL;
2283 struct platform_device *pdev = NULL;
2284
2285 if (!dev) {
2286 /* We need a physical device to attach to, but none was
2287 * provided. Create our own. */
2288 pdev = platform_device_register_simple("parport_pc",
2289 base, NULL, 0);
2290 if (IS_ERR(pdev))
2291 return NULL;
2292 dev = &pdev->dev;
2293
2294 dev->coherent_dma_mask = DMA_BIT_MASK(24);
2295 dev->dma_mask = &dev->coherent_dma_mask;
2296 }
2297
2298 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
2299 if (!ops)
2300 goto out1;
2301
2302 priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
2303 if (!priv)
2304 goto out2;
2305
2306 /* a misnomer, actually - it's allocate and reserve parport number */
2307 p = parport_register_port(base, irq, dma, ops);
2308 if (!p)
2309 goto out3;
2310
2311 base_res = request_region(base, 3, p->name);
2312 if (!base_res)
2313 goto out4;
2314
2315 memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
2316 priv->ctr = 0xc;
2317 priv->ctr_writable = ~0x10;
2318 priv->ecr = 0;
2319 priv->fifo_depth = 0;
2320 priv->dma_buf = NULL;
2321 priv->dma_handle = 0;
2322 INIT_LIST_HEAD(&priv->list);
2323 priv->port = p;
2324
2325 p->dev = dev;
2326 p->base_hi = base_hi;
2327 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2328 p->private_data = priv;
2329
2330 if (base_hi) {
2331 ECR_res = request_region(base_hi, 3, p->name);
2332 if (ECR_res)
2333 parport_ECR_present(p);
2334 }
2335
2336 if (base != 0x3bc) {
2337 EPP_res = request_region(base+0x3, 5, p->name);
2338 if (EPP_res)
2339 if (!parport_EPP_supported(p))
2340 parport_ECPEPP_supported(p);
2341 }
2342 if (!parport_SPP_supported(p))
2343 /* No port. */
2344 goto out5;
2345 if (priv->ecr)
2346 parport_ECPPS2_supported(p);
2347 else
2348 parport_PS2_supported(p);
2349
2350 p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
2351
2352 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2353 if (p->base_hi && priv->ecr)
2354 printk(" (0x%lx)", p->base_hi);
2355 if (p->irq == PARPORT_IRQ_AUTO) {
2356 p->irq = PARPORT_IRQ_NONE;
2357 parport_irq_probe(p);
2358 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2359 p->irq = PARPORT_IRQ_NONE;
2360 parport_irq_probe(p);
2361 probedirq = p->irq;
2362 p->irq = PARPORT_IRQ_NONE;
2363 }
2364 if (p->irq != PARPORT_IRQ_NONE) {
2365 printk(", irq %d", p->irq);
2366 priv->ctr_writable |= 0x10;
2367
2368 if (p->dma == PARPORT_DMA_AUTO) {
2369 p->dma = PARPORT_DMA_NONE;
2370 parport_dma_probe(p);
2371 }
2372 }
2373 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2374 is mandatory (see above) */
2375 p->dma = PARPORT_DMA_NONE;
2376
2377 #ifdef CONFIG_PARPORT_PC_FIFO
2378 if (parport_ECP_supported(p) &&
2379 p->dma != PARPORT_DMA_NOFIFO &&
2380 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2381 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2382 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2383 #ifdef CONFIG_PARPORT_1284
2384 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2385 /* currently broken, but working on it.. (FB) */
2386 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2387 #endif /* IEEE 1284 support */
2388 if (p->dma != PARPORT_DMA_NONE) {
2389 printk(", dma %d", p->dma);
2390 p->modes |= PARPORT_MODE_DMA;
2391 } else
2392 printk(", using FIFO");
2393 } else
2394 /* We can't use the DMA channel after all. */
2395 p->dma = PARPORT_DMA_NONE;
2396 #endif /* Allowed to use FIFO/DMA */
2397
2398 printk(" [");
2399
2400 #define printmode(x) \
2401 {\
2402 if (p->modes & PARPORT_MODE_##x) {\
2403 printk("%s%s", f ? "," : "", #x);\
2404 f++;\
2405 } \
2406 }
2407
2408 {
2409 int f = 0;
2410 printmode(PCSPP);
2411 printmode(TRISTATE);
2412 printmode(COMPAT)
2413 printmode(EPP);
2414 printmode(ECP);
2415 printmode(DMA);
2416 }
2417 #undef printmode
2418 #ifndef CONFIG_PARPORT_1284
2419 printk("(,...)");
2420 #endif /* CONFIG_PARPORT_1284 */
2421 printk("]\n");
2422 if (probedirq != PARPORT_IRQ_NONE)
2423 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2424
2425 /* If No ECP release the ports grabbed above. */
2426 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2427 release_region(base_hi, 3);
2428 ECR_res = NULL;
2429 }
2430 /* Likewise for EEP ports */
2431 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2432 release_region(base+3, 5);
2433 EPP_res = NULL;
2434 }
2435 if (p->irq != PARPORT_IRQ_NONE) {
2436 if (request_irq(p->irq, parport_irq_handler,
2437 irqflags, p->name, p)) {
2438 printk(KERN_WARNING "%s: irq %d in use, "
2439 "resorting to polled operation\n",
2440 p->name, p->irq);
2441 p->irq = PARPORT_IRQ_NONE;
2442 p->dma = PARPORT_DMA_NONE;
2443 }
2444
2445 #ifdef CONFIG_PARPORT_PC_FIFO
2446 #ifdef HAS_DMA
2447 if (p->dma != PARPORT_DMA_NONE) {
2448 if (request_dma(p->dma, p->name)) {
2449 printk(KERN_WARNING "%s: dma %d in use, "
2450 "resorting to PIO operation\n",
2451 p->name, p->dma);
2452 p->dma = PARPORT_DMA_NONE;
2453 } else {
2454 priv->dma_buf =
2455 dma_alloc_coherent(dev,
2456 PAGE_SIZE,
2457 &priv->dma_handle,
2458 GFP_KERNEL);
2459 if (!priv->dma_buf) {
2460 printk(KERN_WARNING "%s: "
2461 "cannot get buffer for DMA, "
2462 "resorting to PIO operation\n",
2463 p->name);
2464 free_dma(p->dma);
2465 p->dma = PARPORT_DMA_NONE;
2466 }
2467 }
2468 }
2469 #endif
2470 #endif
2471 }
2472
2473 /* Done probing. Now put the port into a sensible start-up state. */
2474 if (priv->ecr)
2475 /*
2476 * Put the ECP detected port in PS2 mode.
2477 * Do this also for ports that have ECR but don't do ECP.
2478 */
2479 ECR_WRITE(p, 0x34);
2480
2481 parport_pc_write_data(p, 0);
2482 parport_pc_data_forward(p);
2483
2484 /* Now that we've told the sharing engine about the port, and
2485 found out its characteristics, let the high-level drivers
2486 know about it. */
2487 spin_lock(&ports_lock);
2488 list_add(&priv->list, &ports_list);
2489 spin_unlock(&ports_lock);
2490 parport_announce_port(p);
2491
2492 return p;
2493
2494 out5:
2495 if (ECR_res)
2496 release_region(base_hi, 3);
2497 if (EPP_res)
2498 release_region(base+0x3, 5);
2499 release_region(base, 3);
2500 out4:
2501 parport_put_port(p);
2502 out3:
2503 kfree(priv);
2504 out2:
2505 kfree(ops);
2506 out1:
2507 if (pdev)
2508 platform_device_unregister(pdev);
2509 return NULL;
2510 }
2511 EXPORT_SYMBOL(parport_pc_probe_port);
2512
2513 void parport_pc_unregister_port(struct parport *p)
2514 {
2515 struct parport_pc_private *priv = p->private_data;
2516 struct parport_operations *ops = p->ops;
2517
2518 parport_remove_port(p);
2519 spin_lock(&ports_lock);
2520 list_del_init(&priv->list);
2521 spin_unlock(&ports_lock);
2522 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2523 if (p->dma != PARPORT_DMA_NONE)
2524 free_dma(p->dma);
2525 #endif
2526 if (p->irq != PARPORT_IRQ_NONE)
2527 free_irq(p->irq, p);
2528 release_region(p->base, 3);
2529 if (p->size > 3)
2530 release_region(p->base + 3, p->size - 3);
2531 if (p->modes & PARPORT_MODE_ECP)
2532 release_region(p->base_hi, 3);
2533 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2534 if (priv->dma_buf)
2535 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2536 priv->dma_buf,
2537 priv->dma_handle);
2538 #endif
2539 kfree(p->private_data);
2540 parport_put_port(p);
2541 kfree(ops); /* hope no-one cached it */
2542 }
2543 EXPORT_SYMBOL(parport_pc_unregister_port);
2544
2545 #ifdef CONFIG_PCI
2546
2547 /* ITE support maintained by Rich Liu <richliu@poorman.org> */
2548 static int __devinit sio_ite_8872_probe(struct pci_dev *pdev, int autoirq,
2549 int autodma,
2550 const struct parport_pc_via_data *via)
2551 {
2552 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2553 u32 ite8872set;
2554 u32 ite8872_lpt, ite8872_lpthi;
2555 u8 ite8872_irq, type;
2556 int irq;
2557 int i;
2558
2559 DPRINTK(KERN_DEBUG "sio_ite_8872_probe()\n");
2560
2561 /* make sure which one chip */
2562 for (i = 0; i < 5; i++) {
2563 if (request_region(inta_addr[i], 32, "it887x")) {
2564 int test;
2565 pci_write_config_dword(pdev, 0x60,
2566 0xe5000000 | inta_addr[i]);
2567 pci_write_config_dword(pdev, 0x78,
2568 0x00000000 | inta_addr[i]);
2569 test = inb(inta_addr[i]);
2570 if (test != 0xff)
2571 break;
2572 release_region(inta_addr[i], 32);
2573 }
2574 }
2575 if (i >= 5) {
2576 printk(KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2577 return 0;
2578 }
2579
2580 type = inb(inta_addr[i] + 0x18);
2581 type &= 0x0f;
2582
2583 switch (type) {
2584 case 0x2:
2585 printk(KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2586 ite8872set = 0x64200000;
2587 break;
2588 case 0xa:
2589 printk(KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2590 ite8872set = 0x64200000;
2591 break;
2592 case 0xe:
2593 printk(KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2594 ite8872set = 0x64e00000;
2595 break;
2596 case 0x6:
2597 printk(KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2598 release_region(inta_addr[i], 32);
2599 return 0;
2600 case 0x8:
2601 printk(KERN_INFO "parport_pc: ITE8874 found (2S)\n");
2602 release_region(inta_addr[i], 32);
2603 return 0;
2604 default:
2605 printk(KERN_INFO "parport_pc: unknown ITE887x\n");
2606 printk(KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2607 "output to Rich.Liu@ite.com.tw\n");
2608 release_region(inta_addr[i], 32);
2609 return 0;
2610 }
2611
2612 pci_read_config_byte(pdev, 0x3c, &ite8872_irq);
2613 pci_read_config_dword(pdev, 0x1c, &ite8872_lpt);
2614 ite8872_lpt &= 0x0000ff00;
2615 pci_read_config_dword(pdev, 0x20, &ite8872_lpthi);
2616 ite8872_lpthi &= 0x0000ff00;
2617 pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2618 pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2619 pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2620 /* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */
2621 /* SET Parallel IRQ */
2622 pci_write_config_dword(pdev, 0x9c,
2623 ite8872set | (ite8872_irq * 0x11111));
2624
2625 DPRINTK(KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2626 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2627 ite8872_lpt);
2628 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2629 ite8872_lpthi);
2630
2631 /* Let the user (or defaults) steer us away from interrupts */
2632 irq = ite8872_irq;
2633 if (autoirq != PARPORT_IRQ_AUTO)
2634 irq = PARPORT_IRQ_NONE;
2635
2636 /*
2637 * Release the resource so that parport_pc_probe_port can get it.
2638 */
2639 release_region(inta_addr[i], 32);
2640 if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi,
2641 irq, PARPORT_DMA_NONE, &pdev->dev, 0)) {
2642 printk(KERN_INFO
2643 "parport_pc: ITE 8872 parallel port: io=0x%X",
2644 ite8872_lpt);
2645 if (irq != PARPORT_IRQ_NONE)
2646 printk(", irq=%d", irq);
2647 printk("\n");
2648 return 1;
2649 }
2650
2651 return 0;
2652 }
2653
2654 /* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2655 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2656 static int __devinitdata parport_init_mode;
2657
2658 /* Data for two known VIA chips */
2659 static struct parport_pc_via_data via_686a_data __devinitdata = {
2660 0x51,
2661 0x50,
2662 0x85,
2663 0x02,
2664 0xE2,
2665 0xF0,
2666 0xE6
2667 };
2668 static struct parport_pc_via_data via_8231_data __devinitdata = {
2669 0x45,
2670 0x44,
2671 0x50,
2672 0x04,
2673 0xF2,
2674 0xFA,
2675 0xF6
2676 };
2677
2678 static int __devinit sio_via_probe(struct pci_dev *pdev, int autoirq,
2679 int autodma,
2680 const struct parport_pc_via_data *via)
2681 {
2682 u8 tmp, tmp2, siofunc;
2683 u8 ppcontrol = 0;
2684 int dma, irq;
2685 unsigned port1, port2;
2686 unsigned have_epp = 0;
2687
2688 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2689
2690 switch (parport_init_mode) {
2691 case 1:
2692 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2693 siofunc = VIA_FUNCTION_PARPORT_SPP;
2694 break;
2695 case 2:
2696 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2697 siofunc = VIA_FUNCTION_PARPORT_SPP;
2698 ppcontrol = VIA_PARPORT_BIDIR;
2699 break;
2700 case 3:
2701 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2702 siofunc = VIA_FUNCTION_PARPORT_EPP;
2703 ppcontrol = VIA_PARPORT_BIDIR;
2704 have_epp = 1;
2705 break;
2706 case 4:
2707 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2708 siofunc = VIA_FUNCTION_PARPORT_ECP;
2709 ppcontrol = VIA_PARPORT_BIDIR;
2710 break;
2711 case 5:
2712 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2713 siofunc = VIA_FUNCTION_PARPORT_ECP;
2714 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2715 have_epp = 1;
2716 break;
2717 default:
2718 printk(KERN_DEBUG
2719 "parport_pc: probing current configuration\n");
2720 siofunc = VIA_FUNCTION_PROBE;
2721 break;
2722 }
2723 /*
2724 * unlock super i/o configuration
2725 */
2726 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2727 tmp |= via->via_pci_superio_config_data;
2728 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2729
2730 /* Bits 1-0: Parallel Port Mode / Enable */
2731 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2732 tmp = inb(VIA_CONFIG_DATA);
2733 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2734 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2735 tmp2 = inb(VIA_CONFIG_DATA);
2736 if (siofunc == VIA_FUNCTION_PROBE) {
2737 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2738 ppcontrol = tmp2;
2739 } else {
2740 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2741 tmp |= siofunc;
2742 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2743 outb(tmp, VIA_CONFIG_DATA);
2744 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2745 tmp2 |= ppcontrol;
2746 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2747 outb(tmp2, VIA_CONFIG_DATA);
2748 }
2749
2750 /* Parallel Port I/O Base Address, bits 9-2 */
2751 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2752 port1 = inb(VIA_CONFIG_DATA) << 2;
2753
2754 printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
2755 port1);
2756 if (port1 == 0x3BC && have_epp) {
2757 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2758 outb((0x378 >> 2), VIA_CONFIG_DATA);
2759 printk(KERN_DEBUG
2760 "parport_pc: Parallel port base changed to 0x378\n");
2761 port1 = 0x378;
2762 }
2763
2764 /*
2765 * lock super i/o configuration
2766 */
2767 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2768 tmp &= ~via->via_pci_superio_config_data;
2769 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2770
2771 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2772 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2773 return 0;
2774 }
2775
2776 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2777 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2778 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2779
2780 if (siofunc == VIA_FUNCTION_PARPORT_ECP) {
2781 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2782 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2783 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2784 } else
2785 /* if ECP not enabled, DMA is not enabled, assumed
2786 bogus 'dma' value */
2787 dma = PARPORT_DMA_NONE;
2788
2789 /* Let the user (or defaults) steer us away from interrupts and DMA */
2790 if (autoirq == PARPORT_IRQ_NONE) {
2791 irq = PARPORT_IRQ_NONE;
2792 dma = PARPORT_DMA_NONE;
2793 }
2794 if (autodma == PARPORT_DMA_NONE)
2795 dma = PARPORT_DMA_NONE;
2796
2797 switch (port1) {
2798 case 0x3bc:
2799 port2 = 0x7bc; break;
2800 case 0x378:
2801 port2 = 0x778; break;
2802 case 0x278:
2803 port2 = 0x678; break;
2804 default:
2805 printk(KERN_INFO
2806 "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2807 port1);
2808 return 0;
2809 }
2810
2811 /* filter bogus IRQs */
2812 switch (irq) {
2813 case 0:
2814 case 2:
2815 case 8:
2816 case 13:
2817 irq = PARPORT_IRQ_NONE;
2818 break;
2819
2820 default: /* do nothing */
2821 break;
2822 }
2823
2824 /* finally, do the probe with values obtained */
2825 if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) {
2826 printk(KERN_INFO
2827 "parport_pc: VIA parallel port: io=0x%X", port1);
2828 if (irq != PARPORT_IRQ_NONE)
2829 printk(", irq=%d", irq);
2830 if (dma != PARPORT_DMA_NONE)
2831 printk(", dma=%d", dma);
2832 printk("\n");
2833 return 1;
2834 }
2835
2836 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2837 port1, irq, dma);
2838 return 0;
2839 }
2840
2841
2842 enum parport_pc_sio_types {
2843 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2844 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2845 sio_ite_8872,
2846 last_sio
2847 };
2848
2849 /* each element directly indexed from enum list, above */
2850 static struct parport_pc_superio {
2851 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2852 const struct parport_pc_via_data *via);
2853 const struct parport_pc_via_data *via;
2854 } parport_pc_superio_info[] __devinitdata = {
2855 { sio_via_probe, &via_686a_data, },
2856 { sio_via_probe, &via_8231_data, },
2857 { sio_ite_8872_probe, NULL, },
2858 };
2859
2860 enum parport_pc_pci_cards {
2861 siig_1p_10x = last_sio,
2862 siig_2p_10x,
2863 siig_1p_20x,
2864 siig_2p_20x,
2865 lava_parallel,
2866 lava_parallel_dual_a,
2867 lava_parallel_dual_b,
2868 boca_ioppar,
2869 plx_9050,
2870 timedia_4006a,
2871 timedia_4014,
2872 timedia_4008a,
2873 timedia_4018,
2874 timedia_9018a,
2875 syba_2p_epp,
2876 syba_1p_ecp,
2877 titan_010l,
2878 titan_1284p1,
2879 titan_1284p2,
2880 avlab_1p,
2881 avlab_2p,
2882 oxsemi_952,
2883 oxsemi_954,
2884 oxsemi_840,
2885 oxsemi_pcie_pport,
2886 aks_0100,
2887 mobility_pp,
2888 netmos_9705,
2889 netmos_9715,
2890 netmos_9755,
2891 netmos_9805,
2892 netmos_9815,
2893 netmos_9901,
2894 netmos_9865,
2895 quatech_sppxp100,
2896 };
2897
2898
2899 /* each element directly indexed from enum list, above
2900 * (but offset by last_sio) */
2901 static struct parport_pc_pci {
2902 int numports;
2903 struct { /* BAR (base address registers) numbers in the config
2904 space header */
2905 int lo;
2906 int hi;
2907 /* -1 if not there, >6 for offset-method (max BAR is 6) */
2908 } addr[4];
2909
2910 /* If set, this is called immediately after pci_enable_device.
2911 * If it returns non-zero, no probing will take place and the
2912 * ports will not be used. */
2913 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2914
2915 /* If set, this is called after probing for ports. If 'failed'
2916 * is non-zero we couldn't use any of the ports. */
2917 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2918 } cards[] = {
2919 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2920 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2921 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2922 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2923 /* lava_parallel */ { 1, { { 0, -1 }, } },
2924 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2925 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2926 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2927 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2928 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2929 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2930 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2931 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2932 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2933 /* SYBA uses fixed offsets in
2934 a 1K io window */
2935 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2936 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2937 /* titan_010l */ { 1, { { 3, -1 }, } },
2938 /* titan_1284p1 */ { 1, { { 0, 1 }, } },
2939 /* titan_1284p2 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2940 /* avlab_1p */ { 1, { { 0, 1}, } },
2941 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2942 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2943 * and 840 locks up if you write 1 to bit 2! */
2944 /* oxsemi_952 */ { 1, { { 0, 1 }, } },
2945 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2946 /* oxsemi_840 */ { 1, { { 0, 1 }, } },
2947 /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, } },
2948 /* aks_0100 */ { 1, { { 0, -1 }, } },
2949 /* mobility_pp */ { 1, { { 0, 1 }, } },
2950
2951 /* The netmos entries below are untested */
2952 /* netmos_9705 */ { 1, { { 0, -1 }, } },
2953 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
2954 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
2955 /* netmos_9805 */ { 1, { { 0, -1 }, } },
2956 /* netmos_9815 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2957 /* netmos_9901 */ { 1, { { 0, -1 }, } },
2958 /* netmos_9865 */ { 1, { { 0, -1 }, } },
2959 /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
2960 };
2961
2962 static const struct pci_device_id parport_pc_pci_tbl[] = {
2963 /* Super-IO onboard chips */
2964 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2965 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2966 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2967 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2968
2969 /* PCI cards */
2970 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2971 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2972 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2973 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2974 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2975 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2976 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2977 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2978 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2979 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2980 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2981 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2982 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2983 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2984 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2985 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2986 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2987 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
2988 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2989 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2990 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2991 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2992 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2993 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2994 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2995 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2996 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2997 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2998 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2999 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
3000 { 0x9710, 0x9805, 0x1000, 0x0010, 0, 0, titan_1284p1 },
3001 { 0x9710, 0x9815, 0x1000, 0x0020, 0, 0, titan_1284p2 },
3002 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
3003 /* AFAVLAB_TK9902 */
3004 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
3005 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
3006 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
3007 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
3008 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
3009 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
3010 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
3011 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
3012 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
3013 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3014 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
3015 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3016 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
3017 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3018 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
3019 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3020 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
3021 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3022 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
3023 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3024 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
3025 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3026 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
3027 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
3028 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
3029 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
3030 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
3031 /* NetMos communication controllers */
3032 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
3033 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
3034 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
3035 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
3036 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
3037 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
3038 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
3039 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
3040 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
3041 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
3042 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
3043 0xA000, 0x2000, 0, 0, netmos_9901 },
3044 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
3045 0xA000, 0x1000, 0, 0, netmos_9865 },
3046 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
3047 0xA000, 0x2000, 0, 0, netmos_9865 },
3048 /* Quatech SPPXP-100 Parallel port PCI ExpressCard */
3049 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
3050 PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
3051 { 0, } /* terminate list */
3052 };
3053 MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
3054
3055 struct pci_parport_data {
3056 int num;
3057 struct parport *ports[2];
3058 };
3059
3060 static int parport_pc_pci_probe(struct pci_dev *dev,
3061 const struct pci_device_id *id)
3062 {
3063 int err, count, n, i = id->driver_data;
3064 struct pci_parport_data *data;
3065
3066 if (i < last_sio)
3067 /* This is an onboard Super-IO and has already been probed */
3068 return 0;
3069
3070 /* This is a PCI card */
3071 i -= last_sio;
3072 count = 0;
3073 err = pci_enable_device(dev);
3074 if (err)
3075 return err;
3076
3077 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
3078 if (!data)
3079 return -ENOMEM;
3080
3081 if (cards[i].preinit_hook &&
3082 cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
3083 kfree(data);
3084 return -ENODEV;
3085 }
3086
3087 for (n = 0; n < cards[i].numports; n++) {
3088 int lo = cards[i].addr[n].lo;
3089 int hi = cards[i].addr[n].hi;
3090 int irq;
3091 unsigned long io_lo, io_hi;
3092 io_lo = pci_resource_start(dev, lo);
3093 io_hi = 0;
3094 if ((hi >= 0) && (hi <= 6))
3095 io_hi = pci_resource_start(dev, hi);
3096 else if (hi > 6)
3097 io_lo += hi; /* Reinterpret the meaning of
3098 "hi" as an offset (see SYBA
3099 def.) */
3100 /* TODO: test if sharing interrupts works */
3101 irq = dev->irq;
3102 if (irq == IRQ_NONE) {
3103 printk(KERN_DEBUG
3104 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
3105 parport_pc_pci_tbl[i + last_sio].vendor,
3106 parport_pc_pci_tbl[i + last_sio].device,
3107 io_lo, io_hi);
3108 irq = PARPORT_IRQ_NONE;
3109 } else {
3110 printk(KERN_DEBUG
3111 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
3112 parport_pc_pci_tbl[i + last_sio].vendor,
3113 parport_pc_pci_tbl[i + last_sio].device,
3114 io_lo, io_hi, irq);
3115 }
3116 data->ports[count] =
3117 parport_pc_probe_port(io_lo, io_hi, irq,
3118 PARPORT_DMA_NONE, &dev->dev,
3119 IRQF_SHARED);
3120 if (data->ports[count])
3121 count++;
3122 }
3123
3124 data->num = count;
3125
3126 if (cards[i].postinit_hook)
3127 cards[i].postinit_hook(dev, count == 0);
3128
3129 if (count) {
3130 pci_set_drvdata(dev, data);
3131 return 0;
3132 }
3133
3134 kfree(data);
3135
3136 return -ENODEV;
3137 }
3138
3139 static void __devexit parport_pc_pci_remove(struct pci_dev *dev)
3140 {
3141 struct pci_parport_data *data = pci_get_drvdata(dev);
3142 int i;
3143
3144 pci_set_drvdata(dev, NULL);
3145
3146 if (data) {
3147 for (i = data->num - 1; i >= 0; i--)
3148 parport_pc_unregister_port(data->ports[i]);
3149
3150 kfree(data);
3151 }
3152 }
3153
3154 static struct pci_driver parport_pc_pci_driver = {
3155 .name = "parport_pc",
3156 .id_table = parport_pc_pci_tbl,
3157 .probe = parport_pc_pci_probe,
3158 .remove = __devexit_p(parport_pc_pci_remove),
3159 };
3160
3161 static int __init parport_pc_init_superio(int autoirq, int autodma)
3162 {
3163 const struct pci_device_id *id;
3164 struct pci_dev *pdev = NULL;
3165 int ret = 0;
3166
3167 for_each_pci_dev(pdev) {
3168 id = pci_match_id(parport_pc_pci_tbl, pdev);
3169 if (id == NULL || id->driver_data >= last_sio)
3170 continue;
3171
3172 if (parport_pc_superio_info[id->driver_data].probe(
3173 pdev, autoirq, autodma,
3174 parport_pc_superio_info[id->driver_data].via)) {
3175 ret++;
3176 }
3177 }
3178
3179 return ret; /* number of devices found */
3180 }
3181 #else
3182 static struct pci_driver parport_pc_pci_driver;
3183 static int __init parport_pc_init_superio(int autoirq, int autodma)
3184 {
3185 return 0;
3186 }
3187 #endif /* CONFIG_PCI */
3188
3189 #ifdef CONFIG_PNP
3190
3191 static const struct pnp_device_id parport_pc_pnp_tbl[] = {
3192 /* Standard LPT Printer Port */
3193 {.id = "PNP0400", .driver_data = 0},
3194 /* ECP Printer Port */
3195 {.id = "PNP0401", .driver_data = 0},
3196 { }
3197 };
3198
3199 MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
3200
3201 static int parport_pc_pnp_probe(struct pnp_dev *dev,
3202 const struct pnp_device_id *id)
3203 {
3204 struct parport *pdata;
3205 unsigned long io_lo, io_hi;
3206 int dma, irq;
3207
3208 if (pnp_port_valid(dev, 0) &&
3209 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
3210 io_lo = pnp_port_start(dev, 0);
3211 } else
3212 return -EINVAL;
3213
3214 if (pnp_port_valid(dev, 1) &&
3215 !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
3216 io_hi = pnp_port_start(dev, 1);
3217 } else
3218 io_hi = 0;
3219
3220 if (pnp_irq_valid(dev, 0) &&
3221 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
3222 irq = pnp_irq(dev, 0);
3223 } else
3224 irq = PARPORT_IRQ_NONE;
3225
3226 if (pnp_dma_valid(dev, 0) &&
3227 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
3228 dma = pnp_dma(dev, 0);
3229 } else
3230 dma = PARPORT_DMA_NONE;
3231
3232 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
3233 pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
3234 if (pdata == NULL)
3235 return -ENODEV;
3236
3237 pnp_set_drvdata(dev, pdata);
3238 return 0;
3239 }
3240
3241 static void parport_pc_pnp_remove(struct pnp_dev *dev)
3242 {
3243 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3244 if (!pdata)
3245 return;
3246
3247 parport_pc_unregister_port(pdata);
3248 }
3249
3250 /* we only need the pnp layer to activate the device, at least for now */
3251 static struct pnp_driver parport_pc_pnp_driver = {
3252 .name = "parport_pc",
3253 .id_table = parport_pc_pnp_tbl,
3254 .probe = parport_pc_pnp_probe,
3255 .remove = parport_pc_pnp_remove,
3256 };
3257
3258 #else
3259 static struct pnp_driver parport_pc_pnp_driver;
3260 #endif /* CONFIG_PNP */
3261
3262 static int __devinit parport_pc_platform_probe(struct platform_device *pdev)
3263 {
3264 /* Always succeed, the actual probing is done in
3265 * parport_pc_probe_port(). */
3266 return 0;
3267 }
3268
3269 static struct platform_driver parport_pc_platform_driver = {
3270 .driver = {
3271 .owner = THIS_MODULE,
3272 .name = "parport_pc",
3273 },
3274 .probe = parport_pc_platform_probe,
3275 };
3276
3277 /* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3278 static int __devinit __attribute__((unused))
3279 parport_pc_find_isa_ports(int autoirq, int autodma)
3280 {
3281 int count = 0;
3282
3283 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
3284 count++;
3285 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
3286 count++;
3287 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
3288 count++;
3289
3290 return count;
3291 }
3292
3293 /* This function is called by parport_pc_init if the user didn't
3294 * specify any ports to probe. Its job is to find some ports. Order
3295 * is important here -- we want ISA ports to be registered first,
3296 * followed by PCI cards (for least surprise), but before that we want
3297 * to do chipset-specific tests for some onboard ports that we know
3298 * about.
3299 *
3300 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3301 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3302 */
3303 static void __init parport_pc_find_ports(int autoirq, int autodma)
3304 {
3305 int count = 0, err;
3306
3307 #ifdef CONFIG_PARPORT_PC_SUPERIO
3308 detect_and_report_it87();
3309 detect_and_report_winbond();
3310 detect_and_report_smsc();
3311 #endif
3312
3313 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3314 count += parport_pc_init_superio(autoirq, autodma);
3315
3316 /* PnP ports, skip detection if SuperIO already found them */
3317 if (!count) {
3318 err = pnp_register_driver(&parport_pc_pnp_driver);
3319 if (!err)
3320 pnp_registered_parport = 1;
3321 }
3322
3323 /* ISA ports and whatever (see asm/parport.h). */
3324 parport_pc_find_nonpci_ports(autoirq, autodma);
3325
3326 err = pci_register_driver(&parport_pc_pci_driver);
3327 if (!err)
3328 pci_registered_parport = 1;
3329 }
3330
3331 /*
3332 * Piles of crap below pretend to be a parser for module and kernel
3333 * parameters. Say "thank you" to whoever had come up with that
3334 * syntax and keep in mind that code below is a cleaned up version.
3335 */
3336
3337 static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
3338 [0 ... PARPORT_PC_MAX_PORTS] = 0
3339 };
3340 static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
3341 [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
3342 };
3343 static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
3344 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
3345 };
3346 static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
3347 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
3348 };
3349
3350 static int __init parport_parse_param(const char *s, int *val,
3351 int automatic, int none, int nofifo)
3352 {
3353 if (!s)
3354 return 0;
3355 if (!strncmp(s, "auto", 4))
3356 *val = automatic;
3357 else if (!strncmp(s, "none", 4))
3358 *val = none;
3359 else if (nofifo && !strncmp(s, "nofifo", 6))
3360 *val = nofifo;
3361 else {
3362 char *ep;
3363 unsigned long r = simple_strtoul(s, &ep, 0);
3364 if (ep != s)
3365 *val = r;
3366 else {
3367 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3368 return -1;
3369 }
3370 }
3371 return 0;
3372 }
3373
3374 static int __init parport_parse_irq(const char *irqstr, int *val)
3375 {
3376 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3377 PARPORT_IRQ_NONE, 0);
3378 }
3379
3380 static int __init parport_parse_dma(const char *dmastr, int *val)
3381 {
3382 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3383 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3384 }
3385
3386 #ifdef CONFIG_PCI
3387 static int __init parport_init_mode_setup(char *str)
3388 {
3389 printk(KERN_DEBUG
3390 "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3391
3392 if (!strcmp(str, "spp"))
3393 parport_init_mode = 1;
3394 if (!strcmp(str, "ps2"))
3395 parport_init_mode = 2;
3396 if (!strcmp(str, "epp"))
3397 parport_init_mode = 3;
3398 if (!strcmp(str, "ecp"))
3399 parport_init_mode = 4;
3400 if (!strcmp(str, "ecpepp"))
3401 parport_init_mode = 5;
3402 return 1;
3403 }
3404 #endif
3405
3406 #ifdef MODULE
3407 static const char *irq[PARPORT_PC_MAX_PORTS];
3408 static const char *dma[PARPORT_PC_MAX_PORTS];
3409
3410 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3411 module_param_array(io, int, NULL, 0);
3412 MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3413 module_param_array(io_hi, int, NULL, 0);
3414 MODULE_PARM_DESC(irq, "IRQ line");
3415 module_param_array(irq, charp, NULL, 0);
3416 MODULE_PARM_DESC(dma, "DMA channel");
3417 module_param_array(dma, charp, NULL, 0);
3418 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3419 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3420 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3421 module_param(verbose_probing, int, 0644);
3422 #endif
3423 #ifdef CONFIG_PCI
3424 static char *init_mode;
3425 MODULE_PARM_DESC(init_mode,
3426 "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3427 module_param(init_mode, charp, 0);
3428 #endif
3429
3430 static int __init parse_parport_params(void)
3431 {
3432 unsigned int i;
3433 int val;
3434
3435 #ifdef CONFIG_PCI
3436 if (init_mode)
3437 parport_init_mode_setup(init_mode);
3438 #endif
3439
3440 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3441 if (parport_parse_irq(irq[i], &val))
3442 return 1;
3443 irqval[i] = val;
3444 if (parport_parse_dma(dma[i], &val))
3445 return 1;
3446 dmaval[i] = val;
3447 }
3448 if (!io[0]) {
3449 /* The user can make us use any IRQs or DMAs we find. */
3450 if (irq[0] && !parport_parse_irq(irq[0], &val))
3451 switch (val) {
3452 case PARPORT_IRQ_NONE:
3453 case PARPORT_IRQ_AUTO:
3454 irqval[0] = val;
3455 break;
3456 default:
3457 printk(KERN_WARNING
3458 "parport_pc: irq specified "
3459 "without base address. Use 'io=' "
3460 "to specify one\n");
3461 }
3462
3463 if (dma[0] && !parport_parse_dma(dma[0], &val))
3464 switch (val) {
3465 case PARPORT_DMA_NONE:
3466 case PARPORT_DMA_AUTO:
3467 dmaval[0] = val;
3468 break;
3469 default:
3470 printk(KERN_WARNING
3471 "parport_pc: dma specified "
3472 "without base address. Use 'io=' "
3473 "to specify one\n");
3474 }
3475 }
3476 return 0;
3477 }
3478
3479 #else
3480
3481 static int parport_setup_ptr __initdata;
3482
3483 /*
3484 * Acceptable parameters:
3485 *
3486 * parport=0
3487 * parport=auto
3488 * parport=0xBASE[,IRQ[,DMA]]
3489 *
3490 * IRQ/DMA may be numeric or 'auto' or 'none'
3491 */
3492 static int __init parport_setup(char *str)
3493 {
3494 char *endptr;
3495 char *sep;
3496 int val;
3497
3498 if (!str || !*str || (*str == '0' && !*(str+1))) {
3499 /* Disable parport if "parport=0" in cmdline */
3500 io[0] = PARPORT_DISABLE;
3501 return 1;
3502 }
3503
3504 if (!strncmp(str, "auto", 4)) {
3505 irqval[0] = PARPORT_IRQ_AUTO;
3506 dmaval[0] = PARPORT_DMA_AUTO;
3507 return 1;
3508 }
3509
3510 val = simple_strtoul(str, &endptr, 0);
3511 if (endptr == str) {
3512 printk(KERN_WARNING "parport=%s not understood\n", str);
3513 return 1;
3514 }
3515
3516 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3517 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3518 return 1;
3519 }
3520
3521 io[parport_setup_ptr] = val;
3522 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3523 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3524
3525 sep = strchr(str, ',');
3526 if (sep++) {
3527 if (parport_parse_irq(sep, &val))
3528 return 1;
3529 irqval[parport_setup_ptr] = val;
3530 sep = strchr(sep, ',');
3531 if (sep++) {
3532 if (parport_parse_dma(sep, &val))
3533 return 1;
3534 dmaval[parport_setup_ptr] = val;
3535 }
3536 }
3537 parport_setup_ptr++;
3538 return 1;
3539 }
3540
3541 static int __init parse_parport_params(void)
3542 {
3543 return io[0] == PARPORT_DISABLE;
3544 }
3545
3546 __setup("parport=", parport_setup);
3547
3548 /*
3549 * Acceptable parameters:
3550 *
3551 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3552 */
3553 #ifdef CONFIG_PCI
3554 __setup("parport_init_mode=", parport_init_mode_setup);
3555 #endif
3556 #endif
3557
3558 /* "Parser" ends here */
3559
3560 static int __init parport_pc_init(void)
3561 {
3562 int err;
3563
3564 if (parse_parport_params())
3565 return -EINVAL;
3566
3567 err = platform_driver_register(&parport_pc_platform_driver);
3568 if (err)
3569 return err;
3570
3571 if (io[0]) {
3572 int i;
3573 /* Only probe the ports we were given. */
3574 user_specified = 1;
3575 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3576 if (!io[i])
3577 break;
3578 if (io_hi[i] == PARPORT_IOHI_AUTO)
3579 io_hi[i] = 0x400 + io[i];
3580 parport_pc_probe_port(io[i], io_hi[i],
3581 irqval[i], dmaval[i], NULL, 0);
3582 }
3583 } else
3584 parport_pc_find_ports(irqval[0], dmaval[0]);
3585
3586 return 0;
3587 }
3588
3589 static void __exit parport_pc_exit(void)
3590 {
3591 if (pci_registered_parport)
3592 pci_unregister_driver(&parport_pc_pci_driver);
3593 if (pnp_registered_parport)
3594 pnp_unregister_driver(&parport_pc_pnp_driver);
3595 platform_driver_unregister(&parport_pc_platform_driver);
3596
3597 while (!list_empty(&ports_list)) {
3598 struct parport_pc_private *priv;
3599 struct parport *port;
3600 priv = list_entry(ports_list.next,
3601 struct parport_pc_private, list);
3602 port = priv->port;
3603 if (port->dev && port->dev->bus == &platform_bus_type)
3604 platform_device_unregister(
3605 to_platform_device(port->dev));
3606 parport_pc_unregister_port(port);
3607 }
3608 }
3609
3610 MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3611 MODULE_DESCRIPTION("PC-style parallel port driver");
3612 MODULE_LICENSE("GPL");
3613 module_init(parport_pc_init)
3614 module_exit(parport_pc_exit)
Linux Btrfs Development