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[PATCH] parport: use complete slab buffer
[mirror_ubuntu-artful-kernel.git] / drivers / parport / parport_pc.c
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1da177e4
LT		 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 <campbell@torque.net>
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/config.h>
46#include <linux/module.h>
47#include <linux/init.h>
48#include <linux/sched.h>
49#include <linux/delay.h>
50#include <linux/errno.h>
51#include <linux/interrupt.h>
52#include <linux/ioport.h>
53#include <linux/kernel.h>
54#include <linux/slab.h>
55#include <linux/pci.h>
56#include <linux/pnp.h>
57#include <linux/sysctl.h>
58
59#include <asm/io.h>
60#include <asm/dma.h>
61#include <asm/uaccess.h>
62
63#include <linux/parport.h>
64#include <linux/parport_pc.h>
65#include <linux/via.h>
66#include <asm/parport.h>
67
68#define PARPORT_PC_MAX_PORTS PARPORT_MAX
69
7fbacd52
AV		 70#ifdef CONFIG_ISA_DMA_API
71#define HAS_DMA
72#endif
73
1da177e4
LT		 74/* ECR modes */
75#define ECR_SPP 00
76#define ECR_PS2 01
77#define ECR_PPF 02
78#define ECR_ECP 03
79#define ECR_EPP 04
80#define ECR_VND 05
81#define ECR_TST 06
82#define ECR_CNF 07
83#define ECR_MODE_MASK 0xe0
84#define ECR_WRITE(p,v) frob_econtrol((p),0xff,(v))
85
86#undef DEBUG
87
88#ifdef DEBUG
89#define DPRINTK printk
90#else
91#define DPRINTK(stuff...)
92#endif
93
94
95#define NR_SUPERIOS 3
96static struct superio_struct { /* For Super-IO chips autodetection */
97 int io;
98 int irq;
99 int dma;
100} superios[NR_SUPERIOS] __devinitdata = { {0,},};
101
102static int user_specified;
103#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
104 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
105static int verbose_probing;
106#endif
107static int pci_registered_parport;
108static int pnp_registered_parport;
109
110/* frob_control, but for ECR */
111static void frob_econtrol (struct parport *pb, unsigned char m,
112 unsigned char v)
113{
114 unsigned char ectr = 0;
115
116 if (m != 0xff)
117 ectr = inb (ECONTROL (pb));
118
119 DPRINTK (KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n",
120 m, v, ectr, (ectr & ~m) ^ v);
121
122 outb ((ectr & ~m) ^ v, ECONTROL (pb));
123}
124
125static __inline__ void frob_set_mode (struct parport *p, int mode)
126{
127 frob_econtrol (p, ECR_MODE_MASK, mode << 5);
128}
129
130#ifdef CONFIG_PARPORT_PC_FIFO
131/* Safely change the mode bits in the ECR
132 Returns:
133 0 : Success
134 -EBUSY: Could not drain FIFO in some finite amount of time,
135 mode not changed!
136 */
137static int change_mode(struct parport *p, int m)
138{
139 const struct parport_pc_private *priv = p->physport->private_data;
140 unsigned char oecr;
141 int mode;
142
143 DPRINTK(KERN_INFO "parport change_mode ECP-ISA to mode 0x%02x\n",m);
144
145 if (!priv->ecr) {
146 printk (KERN_DEBUG "change_mode: but there's no ECR!\n");
147 return 0;
148 }
149
150 /* Bits <7:5> contain the mode. */
151 oecr = inb (ECONTROL (p));
152 mode = (oecr >> 5) & 0x7;
153 if (mode == m) return 0;
154
155 if (mode >= 2 && !(priv->ctr & 0x20)) {
156 /* This mode resets the FIFO, so we may
157 * have to wait for it to drain first. */
158 unsigned long expire = jiffies + p->physport->cad->timeout;
159 int counter;
160 switch (mode) {
161 case ECR_PPF: /* Parallel Port FIFO mode */
162 case ECR_ECP: /* ECP Parallel Port mode */
163 /* Busy wait for 200us */
164 for (counter = 0; counter < 40; counter++) {
165 if (inb (ECONTROL (p)) & 0x01)
166 break;
167 if (signal_pending (current)) break;
168 udelay (5);
169 }
170
171 /* Poll slowly. */
172 while (!(inb (ECONTROL (p)) & 0x01)) {
173 if (time_after_eq (jiffies, expire))
174 /* The FIFO is stuck. */
175 return -EBUSY;
7b4ccf8d 176 schedule_timeout_interruptible(msecs_to_jiffies(10));
1da177e4
LT		 177 if (signal_pending (current))
178 break;
179 }
180 }
181 }
182
183 if (mode >= 2 && m >= 2) {
184 /* We have to go through mode 001 */
185 oecr &= ~(7 << 5);
186 oecr |= ECR_PS2 << 5;
187 ECR_WRITE (p, oecr);
188 }
189
190 /* Set the mode. */
191 oecr &= ~(7 << 5);
192 oecr |= m << 5;
193 ECR_WRITE (p, oecr);
194 return 0;
195}
196
197#ifdef CONFIG_PARPORT_1284
198/* Find FIFO lossage; FIFO is reset */
199#if 0
200static int get_fifo_residue (struct parport *p)
201{
202 int residue;
203 int cnfga;
204 const struct parport_pc_private *priv = p->physport->private_data;
205
206 /* Adjust for the contents of the FIFO. */
207 for (residue = priv->fifo_depth; ; residue--) {
208 if (inb (ECONTROL (p)) & 0x2)
209 /* Full up. */
210 break;
211
212 outb (0, FIFO (p));
213 }
214
215 printk (KERN_DEBUG "%s: %d PWords were left in FIFO\n", p->name,
216 residue);
217
218 /* Reset the FIFO. */
219 frob_set_mode (p, ECR_PS2);
220
221 /* Now change to config mode and clean up. FIXME */
222 frob_set_mode (p, ECR_CNF);
223 cnfga = inb (CONFIGA (p));
224 printk (KERN_DEBUG "%s: cnfgA contains 0x%02x\n", p->name, cnfga);
225
226 if (!(cnfga & (1<<2))) {
227 printk (KERN_DEBUG "%s: Accounting for extra byte\n", p->name);
228 residue++;
229 }
230
231 /* Don't care about partial PWords until support is added for
232 * PWord != 1 byte. */
233
234 /* Back to PS2 mode. */
235 frob_set_mode (p, ECR_PS2);
236
237 DPRINTK (KERN_DEBUG "*** get_fifo_residue: done residue collecting (ecr = 0x%2.2x)\n", inb (ECONTROL (p)));
238 return residue;
239}
240#endif /* 0 */
241#endif /* IEEE 1284 support */
242#endif /* FIFO support */
243
244/*
245 * Clear TIMEOUT BIT in EPP MODE
246 *
247 * This is also used in SPP detection.
248 */
249static int clear_epp_timeout(struct parport *pb)
250{
251 unsigned char r;
252
253 if (!(parport_pc_read_status(pb) & 0x01))
254 return 1;
255
256 /* To clear timeout some chips require double read */
257 parport_pc_read_status(pb);
258 r = parport_pc_read_status(pb);
259 outb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */
260 outb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */
261 r = parport_pc_read_status(pb);
262
263 return !(r & 0x01);
264}
265
266/*
267 * Access functions.
268 *
269 * Most of these aren't static because they may be used by the
270 * parport_xxx_yyy macros. extern __inline__ versions of several
271 * of these are in parport_pc.h.
272 */
273
274static irqreturn_t parport_pc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
275{
276 parport_generic_irq(irq, (struct parport *) dev_id, regs);
277 /* FIXME! Was it really ours? */
278 return IRQ_HANDLED;
279}
280
281static void parport_pc_init_state(struct pardevice *dev, 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
293static 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
301static void parport_pc_restore_state(struct parport *p, struct parport_state *s)
302{
303 struct parport_pc_private *priv = p->physport->private_data;
304 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
305 outb (c, CONTROL (p));
306 priv->ctr = c;
307 if (priv->ecr)
308 ECR_WRITE (p, s->u.pc.ecr);
309}
310
311#ifdef CONFIG_PARPORT_1284
312static size_t parport_pc_epp_read_data (struct parport *port, void *buf,
313 size_t length, int flags)
314{
315 size_t got = 0;
316
317 if (flags & PARPORT_W91284PIC) {
318 unsigned char status;
319 size_t left = length;
320
321 /* use knowledge about data lines..:
322 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
323 * pError is 1 if there are 16 bytes in the Warp's FIFO
324 */
325 status = inb (STATUS (port));
326
327 while (!(status & 0x08) && (got < length)) {
328 if ((left >= 16) && (status & 0x20) && !(status & 0x08)) {
329 /* can grab 16 bytes from warp fifo */
330 if (!((long)buf & 0x03)) {
331 insl (EPPDATA (port), buf, 4);
332 } else {
333 insb (EPPDATA (port), buf, 16);
334 }
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 "%s: EPP timeout occurred while talking to "
349 "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 }
361 if (inb (STATUS (port)) & 0x01) {
362 clear_epp_timeout (port);
363 return -EIO;
364 }
365 return length;
366 }
367 for (; got < length; got++) {
368 *((char*)buf) = inb (EPPDATA(port));
369 buf++;
370 if (inb (STATUS (port)) & 0x01) {
371 /* EPP timeout */
372 clear_epp_timeout (port);
373 break;
374 }
375 }
376
377 return got;
378}
379
380static size_t parport_pc_epp_write_data (struct parport *port, const void *buf,
381 size_t length, int flags)
382{
383 size_t written = 0;
384
385 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
386 if (!(((long)buf | length) & 0x03)) {
387 outsl (EPPDATA (port), buf, (length >> 2));
388 } else {
389 outsb (EPPDATA (port), buf, length);
390 }
391 if (inb (STATUS (port)) & 0x01) {
392 clear_epp_timeout (port);
393 return -EIO;
394 }
395 return length;
396 }
397 for (; written < length; written++) {
398 outb (*((char*)buf), EPPDATA(port));
399 buf++;
400 if (inb (STATUS(port)) & 0x01) {
401 clear_epp_timeout (port);
402 break;
403 }
404 }
405
406 return written;
407}
408
409static size_t parport_pc_epp_read_addr (struct parport *port, void *buf,
410 size_t length, int flags)
411{
412 size_t got = 0;
413
414 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
415 insb (EPPADDR (port), buf, length);
416 if (inb (STATUS (port)) & 0x01) {
417 clear_epp_timeout (port);
418 return -EIO;
419 }
420 return length;
421 }
422 for (; got < length; got++) {
423 *((char*)buf) = inb (EPPADDR (port));
424 buf++;
425 if (inb (STATUS (port)) & 0x01) {
426 clear_epp_timeout (port);
427 break;
428 }
429 }
430
431 return got;
432}
433
434static size_t parport_pc_epp_write_addr (struct parport *port,
435 const void *buf, size_t length,
436 int flags)
437{
438 size_t written = 0;
439
440 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
441 outsb (EPPADDR (port), buf, length);
442 if (inb (STATUS (port)) & 0x01) {
443 clear_epp_timeout (port);
444 return -EIO;
445 }
446 return length;
447 }
448 for (; written < length; written++) {
449 outb (*((char*)buf), EPPADDR (port));
450 buf++;
451 if (inb (STATUS (port)) & 0x01) {
452 clear_epp_timeout (port);
453 break;
454 }
455 }
456
457 return written;
458}
459
460static size_t parport_pc_ecpepp_read_data (struct parport *port, void *buf,
461 size_t length, int flags)
462{
463 size_t got;
464
465 frob_set_mode (port, ECR_EPP);
466 parport_pc_data_reverse (port);
467 parport_pc_write_control (port, 0x4);
468 got = parport_pc_epp_read_data (port, buf, length, flags);
469 frob_set_mode (port, ECR_PS2);
470
471 return got;
472}
473
474static size_t parport_pc_ecpepp_write_data (struct parport *port,
475 const void *buf, size_t length,
476 int flags)
477{
478 size_t written;
479
480 frob_set_mode (port, ECR_EPP);
481 parport_pc_write_control (port, 0x4);
482 parport_pc_data_forward (port);
483 written = parport_pc_epp_write_data (port, buf, length, flags);
484 frob_set_mode (port, ECR_PS2);
485
486 return written;
487}
488
489static size_t parport_pc_ecpepp_read_addr (struct parport *port, void *buf,
490 size_t length, int flags)
491{
492 size_t got;
493
494 frob_set_mode (port, ECR_EPP);
495 parport_pc_data_reverse (port);
496 parport_pc_write_control (port, 0x4);
497 got = parport_pc_epp_read_addr (port, buf, length, flags);
498 frob_set_mode (port, ECR_PS2);
499
500 return got;
501}
502
503static size_t parport_pc_ecpepp_write_addr (struct parport *port,
504 const void *buf, size_t length,
505 int flags)
506{
507 size_t written;
508
509 frob_set_mode (port, ECR_EPP);
510 parport_pc_write_control (port, 0x4);
511 parport_pc_data_forward (port);
512 written = parport_pc_epp_write_addr (port, buf, length, flags);
513 frob_set_mode (port, ECR_PS2);
514
515 return written;
516}
517#endif /* IEEE 1284 support */
518
519#ifdef CONFIG_PARPORT_PC_FIFO
520static size_t parport_pc_fifo_write_block_pio (struct parport *port,
521 const void *buf, size_t length)
522{
523 int ret = 0;
524 const unsigned char *bufp = buf;
525 size_t left = length;
526 unsigned long expire = jiffies + port->physport->cad->timeout;
527 const int fifo = FIFO (port);
528 int poll_for = 8; /* 80 usecs */
529 const struct parport_pc_private *priv = port->physport->private_data;
530 const int fifo_depth = priv->fifo_depth;
531
532 port = port->physport;
533
534 /* We don't want to be interrupted every character. */
535 parport_pc_disable_irq (port);
536 /* set nErrIntrEn and serviceIntr */
537 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
538
539 /* Forward mode. */
540 parport_pc_data_forward (port); /* Must be in PS2 mode */
541
542 while (left) {
543 unsigned char byte;
544 unsigned char ecrval = inb (ECONTROL (port));
545 int i = 0;
546
547 if (need_resched() && time_before (jiffies, expire))
548 /* Can't yield the port. */
549 schedule ();
550
551 /* Anyone else waiting for the port? */
552 if (port->waithead) {
553 printk (KERN_DEBUG "Somebody wants the port\n");
554 break;
555 }
556
557 if (ecrval & 0x02) {
558 /* FIFO is full. Wait for interrupt. */
559
560 /* Clear serviceIntr */
561 ECR_WRITE (port, ecrval & ~(1<<2));
562 false_alarm:
563 ret = parport_wait_event (port, HZ);
564 if (ret < 0) break;
565 ret = 0;
566 if (!time_before (jiffies, expire)) {
567 /* Timed out. */
568 printk (KERN_DEBUG "FIFO write timed out\n");
569 break;
570 }
571 ecrval = inb (ECONTROL (port));
572 if (!(ecrval & (1<<2))) {
573 if (need_resched() &&
574 time_before (jiffies, expire))
575 schedule ();
576
577 goto false_alarm;
578 }
579
580 continue;
581 }
582
583 /* Can't fail now. */
584 expire = jiffies + port->cad->timeout;
585
586 poll:
587 if (signal_pending (current))
588 break;
589
590 if (ecrval & 0x01) {
591 /* FIFO is empty. Blast it full. */
592 const int n = left < fifo_depth ? left : fifo_depth;
593 outsb (fifo, bufp, n);
594 bufp += n;
595 left -= n;
596
597 /* Adjust the poll time. */
598 if (i < (poll_for - 2)) 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
612dump_parport_state ("leave fifo_write_block_pio", port);
613 return length - left;
614}
615
7fbacd52 616#ifdef HAS_DMA
1da177e4
LT		 617static size_t parport_pc_fifo_write_block_dma (struct parport *port,
618 const void *buf, size_t length)
619{
620 int ret = 0;
621 unsigned long dmaflag;
622 size_t left = length;
623 const struct parport_pc_private *priv = port->physport->private_data;
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
629dump_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 = pci_map_single(priv->dev, (void *)buf, length,
636 PCI_DMA_TODEVICE);
637 } else {
638 /* above 16 MB we use a bounce buffer as ISA-DMA is not possible */
639 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
640 dma_addr = priv->dma_handle;
641 dma_handle = 0;
642 }
643
644 port = port->physport;
645
646 /* We don't want to be interrupted every character. */
647 parport_pc_disable_irq (port);
648 /* set nErrIntrEn and serviceIntr */
649 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
650
651 /* Forward mode. */
652 parport_pc_data_forward (port); /* Must be in PS2 mode */
653
654 while (left) {
655 unsigned long expire = jiffies + port->physport->cad->timeout;
656
657 size_t count = left;
658
659 if (count > maxlen)
660 count = maxlen;
661
662 if (!dma_handle) /* bounce buffer ! */
663 memcpy(priv->dma_buf, buf, count);
664
665 dmaflag = claim_dma_lock();
666 disable_dma(port->dma);
667 clear_dma_ff(port->dma);
668 set_dma_mode(port->dma, DMA_MODE_WRITE);
669 set_dma_addr(port->dma, dma_addr);
670 set_dma_count(port->dma, count);
671
672 /* Set DMA mode */
673 frob_econtrol (port, 1<<3, 1<<3);
674
675 /* Clear serviceIntr */
676 frob_econtrol (port, 1<<2, 0);
677
678 enable_dma(port->dma);
679 release_dma_lock(dmaflag);
680
681 /* assume DMA will be successful */
682 left -= count;
683 buf += count;
684 if (dma_handle) dma_addr += count;
685
686 /* Wait for interrupt. */
687 false_alarm:
688 ret = parport_wait_event (port, HZ);
689 if (ret < 0) break;
690 ret = 0;
691 if (!time_before (jiffies, expire)) {
692 /* Timed out. */
693 printk (KERN_DEBUG "DMA write timed out\n");
694 break;
695 }
696 /* Is serviceIntr set? */
697 if (!(inb (ECONTROL (port)) & (1<<2))) {
698 cond_resched();
699
700 goto false_alarm;
701 }
702
703 dmaflag = claim_dma_lock();
704 disable_dma(port->dma);
705 clear_dma_ff(port->dma);
706 count = get_dma_residue(port->dma);
707 release_dma_lock(dmaflag);
708
709 cond_resched(); /* Can't yield the port. */
710
711 /* Anyone else waiting for the port? */
712 if (port->waithead) {
713 printk (KERN_DEBUG "Somebody wants the port\n");
714 break;
715 }
716
717 /* update for possible DMA residue ! */
718 buf -= count;
719 left += count;
720 if (dma_handle) dma_addr -= count;
721 }
722
723 /* Maybe got here through break, so adjust for DMA residue! */
724 dmaflag = claim_dma_lock();
725 disable_dma(port->dma);
726 clear_dma_ff(port->dma);
727 left += get_dma_residue(port->dma);
728 release_dma_lock(dmaflag);
729
730 /* Turn off DMA mode */
731 frob_econtrol (port, 1<<3, 0);
732
733 if (dma_handle)
734 pci_unmap_single(priv->dev, dma_handle, length, PCI_DMA_TODEVICE);
735
736dump_parport_state ("leave fifo_write_block_dma", port);
737 return length - left;
738}
7fbacd52
AV		 739#endif
740
741static inline size_t parport_pc_fifo_write_block(struct parport *port,
742 const void *buf, size_t length)
743{
744#ifdef HAS_DMA
745 if (port->dma != PARPORT_DMA_NONE)
746 return parport_pc_fifo_write_block_dma (port, buf, length);
747#endif
748 return parport_pc_fifo_write_block_pio (port, buf, length);
749}
1da177e4
LT		 750
751/* Parallel Port FIFO mode (ECP chipsets) */
752static size_t parport_pc_compat_write_block_pio (struct parport *port,
753 const void *buf, size_t length,
754 int flags)
755{
756 size_t written;
757 int r;
758 unsigned long expire;
759 const struct parport_pc_private *priv = port->physport->private_data;
760
761 /* Special case: a timeout of zero means we cannot call schedule().
762 * Also if O_NONBLOCK is set then use the default implementation. */
763 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
764 return parport_ieee1284_write_compat (port, buf,
765 length, flags);
766
767 /* Set up parallel port FIFO mode.*/
768 parport_pc_data_forward (port); /* Must be in PS2 mode */
769 parport_pc_frob_control (port, PARPORT_CONTROL_STROBE, 0);
770 r = change_mode (port, ECR_PPF); /* Parallel port FIFO */
771 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n", port->name);
772
773 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
774
775 /* Write the data to the FIFO. */
7fbacd52 776 written = parport_pc_fifo_write_block(port, buf, length);
1da177e4
LT		 777
778 /* Finish up. */
779 /* For some hardware we don't want to touch the mode until
780 * the FIFO is empty, so allow 4 seconds for each position
781 * in the fifo.
782 */
783 expire = jiffies + (priv->fifo_depth * HZ * 4);
784 do {
785 /* Wait for the FIFO to empty */
786 r = change_mode (port, ECR_PS2);
787 if (r != -EBUSY) {
788 break;
789 }
790 } while (time_before (jiffies, expire));
791 if (r == -EBUSY) {
792
793 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
794
795 /* Prevent further data transfer. */
796 frob_set_mode (port, ECR_TST);
797
798 /* Adjust for the contents of the FIFO. */
799 for (written -= priv->fifo_depth; ; written++) {
800 if (inb (ECONTROL (port)) & 0x2) {
801 /* Full up. */
802 break;
803 }
804 outb (0, FIFO (port));
805 }
806
807 /* Reset the FIFO and return to PS2 mode. */
808 frob_set_mode (port, ECR_PS2);
809 }
810
811 r = parport_wait_peripheral (port,
812 PARPORT_STATUS_BUSY,
813 PARPORT_STATUS_BUSY);
814 if (r)
815 printk (KERN_DEBUG
816 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
817 port->name, r);
818
819 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
820
821 return written;
822}
823
824/* ECP */
825#ifdef CONFIG_PARPORT_1284
826static size_t parport_pc_ecp_write_block_pio (struct parport *port,
827 const void *buf, size_t length,
828 int flags)
829{
830 size_t written;
831 int r;
832 unsigned long expire;
833 const struct parport_pc_private *priv = port->physport->private_data;
834
835 /* Special case: a timeout of zero means we cannot call schedule().
836 * Also if O_NONBLOCK is set then use the default implementation. */
837 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
838 return parport_ieee1284_ecp_write_data (port, buf,
839 length, flags);
840
841 /* Switch to forward mode if necessary. */
842 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
843 /* Event 47: Set nInit high. */
844 parport_frob_control (port,
845 PARPORT_CONTROL_INIT
846 | PARPORT_CONTROL_AUTOFD,
847 PARPORT_CONTROL_INIT
848 | PARPORT_CONTROL_AUTOFD);
849
850 /* Event 49: PError goes high. */
851 r = parport_wait_peripheral (port,
852 PARPORT_STATUS_PAPEROUT,
853 PARPORT_STATUS_PAPEROUT);
854 if (r) {
855 printk (KERN_DEBUG "%s: PError timeout (%d) "
856 "in ecp_write_block_pio\n", port->name, r);
857 }
858 }
859
860 /* Set up ECP parallel port mode.*/
861 parport_pc_data_forward (port); /* Must be in PS2 mode */
862 parport_pc_frob_control (port,
863 PARPORT_CONTROL_STROBE |
864 PARPORT_CONTROL_AUTOFD,
865 0);
866 r = change_mode (port, ECR_ECP); /* ECP FIFO */
867 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
868 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
869
870 /* Write the data to the FIFO. */
7fbacd52 871 written = parport_pc_fifo_write_block(port, buf, length);
1da177e4
LT		 872
873 /* Finish up. */
874 /* For some hardware we don't want to touch the mode until
875 * the FIFO is empty, so allow 4 seconds for each position
876 * in the fifo.
877 */
878 expire = jiffies + (priv->fifo_depth * (HZ * 4));
879 do {
880 /* Wait for the FIFO to empty */
881 r = change_mode (port, ECR_PS2);
882 if (r != -EBUSY) {
883 break;
884 }
885 } while (time_before (jiffies, expire));
886 if (r == -EBUSY) {
887
888 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
889
890 /* Prevent further data transfer. */
891 frob_set_mode (port, ECR_TST);
892
893 /* Adjust for the contents of the FIFO. */
894 for (written -= priv->fifo_depth; ; written++) {
895 if (inb (ECONTROL (port)) & 0x2) {
896 /* Full up. */
897 break;
898 }
899 outb (0, FIFO (port));
900 }
901
902 /* Reset the FIFO and return to PS2 mode. */
903 frob_set_mode (port, ECR_PS2);
904
905 /* Host transfer recovery. */
906 parport_pc_data_reverse (port); /* Must be in PS2 mode */
907 udelay (5);
908 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
909 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
910 if (r)
911 printk (KERN_DEBUG "%s: PE,1 timeout (%d) "
912 "in ecp_write_block_pio\n", port->name, r);
913
914 parport_frob_control (port,
915 PARPORT_CONTROL_INIT,
916 PARPORT_CONTROL_INIT);
917 r = parport_wait_peripheral (port,
918 PARPORT_STATUS_PAPEROUT,
919 PARPORT_STATUS_PAPEROUT);
920 if (r)
921 printk (KERN_DEBUG "%s: PE,2 timeout (%d) "
922 "in ecp_write_block_pio\n", port->name, r);
923 }
924
925 r = parport_wait_peripheral (port,
926 PARPORT_STATUS_BUSY,
927 PARPORT_STATUS_BUSY);
928 if(r)
929 printk (KERN_DEBUG
930 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
931 port->name, r);
932
933 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
934
935 return written;
936}
937
938#if 0
939static size_t parport_pc_ecp_read_block_pio (struct parport *port,
940 void *buf, size_t length,
941 int flags)
942{
943 size_t left = length;
944 size_t fifofull;
945 int r;
946 const int fifo = FIFO(port);
947 const struct parport_pc_private *priv = port->physport->private_data;
948 const int fifo_depth = priv->fifo_depth;
949 char *bufp = buf;
950
951 port = port->physport;
952DPRINTK (KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n");
953dump_parport_state ("enter fcn", port);
954
955 /* Special case: a timeout of zero means we cannot call schedule().
956 * Also if O_NONBLOCK is set then use the default implementation. */
957 if (port->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
958 return parport_ieee1284_ecp_read_data (port, buf,
959 length, flags);
960
961 if (port->ieee1284.mode == IEEE1284_MODE_ECPRLE) {
962 /* If the peripheral is allowed to send RLE compressed
963 * data, it is possible for a byte to expand to 128
964 * bytes in the FIFO. */
965 fifofull = 128;
966 } else {
967 fifofull = fifo_depth;
968 }
969
970 /* If the caller wants less than a full FIFO's worth of data,
971 * go through software emulation. Otherwise we may have to throw
972 * away data. */
973 if (length < fifofull)
974 return parport_ieee1284_ecp_read_data (port, buf,
975 length, flags);
976
977 if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE) {
978 /* change to reverse-idle phase (must be in forward-idle) */
979
980 /* Event 38: Set nAutoFd low (also make sure nStrobe is high) */
981 parport_frob_control (port,
982 PARPORT_CONTROL_AUTOFD
983 | PARPORT_CONTROL_STROBE,
984 PARPORT_CONTROL_AUTOFD);
985 parport_pc_data_reverse (port); /* Must be in PS2 mode */
986 udelay (5);
987 /* Event 39: Set nInit low to initiate bus reversal */
988 parport_frob_control (port,
989 PARPORT_CONTROL_INIT,
990 0);
991 /* Event 40: Wait for nAckReverse (PError) to go low */
992 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
993 if (r) {
994 printk (KERN_DEBUG "%s: PE timeout Event 40 (%d) "
995 "in ecp_read_block_pio\n", port->name, r);
996 return 0;
997 }
998 }
999
1000 /* Set up ECP FIFO mode.*/
1001/* parport_pc_frob_control (port,
1002 PARPORT_CONTROL_STROBE |
1003 PARPORT_CONTROL_AUTOFD,
1004 PARPORT_CONTROL_AUTOFD); */
1005 r = change_mode (port, ECR_ECP); /* ECP FIFO */
1006 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
1007
1008 port->ieee1284.phase = IEEE1284_PH_REV_DATA;
1009
1010 /* the first byte must be collected manually */
1011dump_parport_state ("pre 43", port);
1012 /* Event 43: Wait for nAck to go low */
1013 r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0);
1014 if (r) {
1015 /* timed out while reading -- no data */
1016 printk (KERN_DEBUG "PIO read timed out (initial byte)\n");
1017 goto out_no_data;
1018 }
1019 /* read byte */
1020 *bufp++ = inb (DATA (port));
1021 left--;
1022dump_parport_state ("43-44", port);
1023 /* Event 44: nAutoFd (HostAck) goes high to acknowledge */
1024 parport_pc_frob_control (port,
1025 PARPORT_CONTROL_AUTOFD,
1026 0);
1027dump_parport_state ("pre 45", port);
1028 /* Event 45: Wait for nAck to go high */
1029/* r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, PARPORT_STATUS_ACK); */
1030dump_parport_state ("post 45", port);
1031r = 0;
1032 if (r) {
1033 /* timed out while waiting for peripheral to respond to ack */
1034 printk (KERN_DEBUG "ECP PIO read timed out (waiting for nAck)\n");
1035
1036 /* keep hold of the byte we've got already */
1037 goto out_no_data;
1038 }
1039 /* Event 46: nAutoFd (HostAck) goes low to accept more data */
1040 parport_pc_frob_control (port,
1041 PARPORT_CONTROL_AUTOFD,
1042 PARPORT_CONTROL_AUTOFD);
1043
1044
1045dump_parport_state ("rev idle", port);
1046 /* Do the transfer. */
1047 while (left > fifofull) {
1048 int ret;
1049 unsigned long expire = jiffies + port->cad->timeout;
1050 unsigned char ecrval = inb (ECONTROL (port));
1051
1052 if (need_resched() && time_before (jiffies, expire))
1053 /* Can't yield the port. */
1054 schedule ();
1055
1056 /* At this point, the FIFO may already be full. In
1057 * that case ECP is already holding back the
1058 * peripheral (assuming proper design) with a delayed
1059 * handshake. Work fast to avoid a peripheral
1060 * timeout. */
1061
1062 if (ecrval & 0x01) {
1063 /* FIFO is empty. Wait for interrupt. */
1064dump_parport_state ("FIFO empty", port);
1065
1066 /* Anyone else waiting for the port? */
1067 if (port->waithead) {
1068 printk (KERN_DEBUG "Somebody wants the port\n");
1069 break;
1070 }
1071
1072 /* Clear serviceIntr */
1073 ECR_WRITE (port, ecrval & ~(1<<2));
1074 false_alarm:
1075dump_parport_state ("waiting", port);
1076 ret = parport_wait_event (port, HZ);
1077DPRINTK (KERN_DEBUG "parport_wait_event returned %d\n", ret);
1078 if (ret < 0)
1079 break;
1080 ret = 0;
1081 if (!time_before (jiffies, expire)) {
1082 /* Timed out. */
1083dump_parport_state ("timeout", port);
1084 printk (KERN_DEBUG "PIO read timed out\n");
1085 break;
1086 }
1087 ecrval = inb (ECONTROL (port));
1088 if (!(ecrval & (1<<2))) {
1089 if (need_resched() &&
1090 time_before (jiffies, expire)) {
1091 schedule ();
1092 }
1093 goto false_alarm;
1094 }
1095
1096 /* Depending on how the FIFO threshold was
1097 * set, how long interrupt service took, and
1098 * how fast the peripheral is, we might be
1099 * lucky and have a just filled FIFO. */
1100 continue;
1101 }
1102
1103 if (ecrval & 0x02) {
1104 /* FIFO is full. */
1105dump_parport_state ("FIFO full", port);
1106 insb (fifo, bufp, fifo_depth);
1107 bufp += fifo_depth;
1108 left -= fifo_depth;
1109 continue;
1110 }
1111
1112DPRINTK (KERN_DEBUG "*** ecp_read_block_pio: reading one byte from the FIFO\n");
1113
1114 /* FIFO not filled. We will cycle this loop for a while
1115 * and either the peripheral will fill it faster,
1116 * tripping a fast empty with insb, or we empty it. */
1117 *bufp++ = inb (fifo);
1118 left--;
1119 }
1120
1121 /* scoop up anything left in the FIFO */
1122 while (left && !(inb (ECONTROL (port) & 0x01))) {
1123 *bufp++ = inb (fifo);
1124 left--;
1125 }
1126
1127 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
1128dump_parport_state ("rev idle2", port);
1129
1130out_no_data:
1131
1132 /* Go to forward idle mode to shut the peripheral up (event 47). */
1133 parport_frob_control (port, PARPORT_CONTROL_INIT, PARPORT_CONTROL_INIT);
1134
1135 /* event 49: PError goes high */
1136 r = parport_wait_peripheral (port,
1137 PARPORT_STATUS_PAPEROUT,
1138 PARPORT_STATUS_PAPEROUT);
1139 if (r) {
1140 printk (KERN_DEBUG
1141 "%s: PE timeout FWDIDLE (%d) in ecp_read_block_pio\n",
1142 port->name, r);
1143 }
1144
1145 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
1146
1147 /* Finish up. */
1148 {
1149 int lost = get_fifo_residue (port);
1150 if (lost)
1151 /* Shouldn't happen with compliant peripherals. */
1152 printk (KERN_DEBUG "%s: DATA LOSS (%d bytes)!\n",
1153 port->name, lost);
1154 }
1155
1156dump_parport_state ("fwd idle", port);
1157 return length - left;
1158}
1159#endif /* 0 */
1160#endif /* IEEE 1284 support */
1161#endif /* Allowed to use FIFO/DMA */
1162
1163
1164/*
1165 * ******************************************
1166 * INITIALISATION AND MODULE STUFF BELOW HERE
1167 * ******************************************
1168 */
1169
1170/* GCC is not inlining extern inline function later overwriten to non-inline,
1171 so we use outlined_ variants here. */
1172static struct parport_operations parport_pc_ops =
1173{
1174 .write_data = parport_pc_write_data,
1175 .read_data = parport_pc_read_data,
1176
1177 .write_control = parport_pc_write_control,
1178 .read_control = parport_pc_read_control,
1179 .frob_control = parport_pc_frob_control,
1180
1181 .read_status = parport_pc_read_status,
1182
1183 .enable_irq = parport_pc_enable_irq,
1184 .disable_irq = parport_pc_disable_irq,
1185
1186 .data_forward = parport_pc_data_forward,
1187 .data_reverse = parport_pc_data_reverse,
1188
1189 .init_state = parport_pc_init_state,
1190 .save_state = parport_pc_save_state,
1191 .restore_state = parport_pc_restore_state,
1192
1193 .epp_write_data = parport_ieee1284_epp_write_data,
1194 .epp_read_data = parport_ieee1284_epp_read_data,
1195 .epp_write_addr = parport_ieee1284_epp_write_addr,
1196 .epp_read_addr = parport_ieee1284_epp_read_addr,
1197
1198 .ecp_write_data = parport_ieee1284_ecp_write_data,
1199 .ecp_read_data = parport_ieee1284_ecp_read_data,
1200 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
1201
1202 .compat_write_data = parport_ieee1284_write_compat,
1203 .nibble_read_data = parport_ieee1284_read_nibble,
1204 .byte_read_data = parport_ieee1284_read_byte,
1205
1206 .owner = THIS_MODULE,
1207};
1208
1209#ifdef CONFIG_PARPORT_PC_SUPERIO
1210/* Super-IO chipset detection, Winbond, SMSC */
1211static void __devinit show_parconfig_smsc37c669(int io, int key)
1212{
1213 int cr1,cr4,cra,cr23,cr26,cr27,i=0;
1214 static const char *modes[]={ "SPP and Bidirectional (PS/2)",
1215 "EPP and SPP",
1216 "ECP",
1217 "ECP and EPP" };
1218
1219 outb(key,io);
1220 outb(key,io);
1221 outb(1,io);
1222 cr1=inb(io+1);
1223 outb(4,io);
1224 cr4=inb(io+1);
1225 outb(0x0a,io);
1226 cra=inb(io+1);
1227 outb(0x23,io);
1228 cr23=inb(io+1);
1229 outb(0x26,io);
1230 cr26=inb(io+1);
1231 outb(0x27,io);
1232 cr27=inb(io+1);
1233 outb(0xaa,io);
1234
1235 if (verbose_probing) {
1236 printk (KERN_INFO "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
1237 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
1238 cr1,cr4,cra,cr23,cr26,cr27);
1239
1240 /* The documentation calls DMA and IRQ-Lines by letters, so
1241 the board maker can/will wire them
1242 appropriately/randomly... G=reserved H=IDE-irq, */
1243 printk (KERN_INFO "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, "
1244 "fifo threshold=%d\n", cr23*4,
1245 (cr27 &0x0f) ? 'A'-1+(cr27 &0x0f): '-',
1246 (cr26 &0x0f) ? 'A'-1+(cr26 &0x0f): '-', cra & 0x0f);
1247 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
1248 (cr23*4 >=0x100) ?"yes":"no", (cr1 & 4) ? "yes" : "no");
1249 printk(KERN_INFO "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1250 (cr1 & 0x08 ) ? "Standard mode only (SPP)" : modes[cr4 & 0x03],
1251 (cr4 & 0x40) ? "1.7" : "1.9");
1252 }
1253
1254 /* Heuristics ! BIOS setup for this mainboard device limits
1255 the choices to standard settings, i.e. io-address and IRQ
1256 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1257 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1258 if(cr23*4 >=0x100) { /* if active */
1259 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1260 i++;
1261 if(i==NR_SUPERIOS)
1262 printk(KERN_INFO "Super-IO: too many chips!\n");
1263 else {
1264 int d;
1265 switch (cr23*4) {
1266 case 0x3bc:
1267 superios[i].io = 0x3bc;
1268 superios[i].irq = 7;
1269 break;
1270 case 0x378:
1271 superios[i].io = 0x378;
1272 superios[i].irq = 7;
1273 break;
1274 case 0x278:
1275 superios[i].io = 0x278;
1276 superios[i].irq = 5;
1277 }
1278 d=(cr26 &0x0f);
1279 if((d==1) || (d==3))
1280 superios[i].dma= d;
1281 else
1282 superios[i].dma= PARPORT_DMA_NONE;
1283 }
1284 }
1285}
1286
1287
1288static void __devinit show_parconfig_winbond(int io, int key)
1289{
1290 int cr30,cr60,cr61,cr70,cr74,crf0,i=0;
1291 static const char *modes[] = {
1292 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1293 "EPP-1.9 and SPP",
1294 "ECP",
1295 "ECP and EPP-1.9",
1296 "Standard (SPP)",
1297 "EPP-1.7 and SPP", /* 5 */
1298 "undefined!",
1299 "ECP and EPP-1.7" };
1300 static char *irqtypes[] = { "pulsed low, high-Z", "follows nACK" };
1301
1302 /* The registers are called compatible-PnP because the
1303 register layout is modelled after ISA-PnP, the access
1304 method is just another ... */
1305 outb(key,io);
1306 outb(key,io);
1307 outb(0x07,io); /* Register 7: Select Logical Device */
1308 outb(0x01,io+1); /* LD1 is Parallel Port */
1309 outb(0x30,io);
1310 cr30=inb(io+1);
1311 outb(0x60,io);
1312 cr60=inb(io+1);
1313 outb(0x61,io);
1314 cr61=inb(io+1);
1315 outb(0x70,io);
1316 cr70=inb(io+1);
1317 outb(0x74,io);
1318 cr74=inb(io+1);
1319 outb(0xf0,io);
1320 crf0=inb(io+1);
1321 outb(0xaa,io);
1322
1323 if (verbose_probing) {
1324 printk(KERN_INFO "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x "
1325 "70=%02x 74=%02x, f0=%02x\n", cr30,cr60,cr61,cr70,cr74,crf0);
1326 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1327 (cr30 & 0x01) ? "yes":"no", cr60,cr61,cr70&0x0f );
1328 if ((cr74 & 0x07) > 3)
1329 printk("dma=none\n");
1330 else
1331 printk("dma=%d\n",cr74 & 0x07);
1332 printk(KERN_INFO "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1333 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1334 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n", modes[crf0 & 0x07]);
1335 }
1336
1337 if(cr30 & 0x01) { /* the settings can be interrogated later ... */
1338 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1339 i++;
1340 if(i==NR_SUPERIOS)
1341 printk(KERN_INFO "Super-IO: too many chips!\n");
1342 else {
1343 superios[i].io = (cr60<<8)|cr61;
1344 superios[i].irq = cr70&0x0f;
1345 superios[i].dma = (((cr74 & 0x07) > 3) ?
1346 PARPORT_DMA_NONE : (cr74 & 0x07));
1347 }
1348 }
1349}
1350
1351static void __devinit decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1352{
1353 const char *type = "unknown";
1354 int id,progif=2;
1355
1356 if (devid == devrev)
1357 /* simple heuristics, we happened to read some
1358 non-winbond register */
1359 return;
1360
1361 id=(devid<<8) | devrev;
1362
1363 /* Values are from public data sheets pdf files, I can just
1364 confirm 83977TF is correct :-) */
1365 if (id == 0x9771) type="83977F/AF";
1366 else if (id == 0x9773) type="83977TF / SMSC 97w33x/97w34x";
1367 else if (id == 0x9774) type="83977ATF";
1368 else if ((id & ~0x0f) == 0x5270) type="83977CTF / SMSC 97w36x";
1369 else if ((id & ~0x0f) == 0x52f0) type="83977EF / SMSC 97w35x";
1370 else if ((id & ~0x0f) == 0x5210) type="83627";
1371 else if ((id & ~0x0f) == 0x6010) type="83697HF";
1372 else if ((oldid &0x0f ) == 0x0a) { type="83877F"; progif=1;}
1373 else if ((oldid &0x0f ) == 0x0b) { type="83877AF"; progif=1;}
1374 else if ((oldid &0x0f ) == 0x0c) { type="83877TF"; progif=1;}
1375 else if ((oldid &0x0f ) == 0x0d) { type="83877ATF"; progif=1;}
1376 else progif=0;
1377
1378 if (verbose_probing)
1379 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1380 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1381 efer, key, devid, devrev, oldid, type);
1382
1383 if (progif == 2)
1384 show_parconfig_winbond(efer,key);
1385}
1386
1387static void __devinit decode_smsc(int efer, int key, int devid, int devrev)
1388{
1389 const char *type = "unknown";
1390 void (*func)(int io, int key);
1391 int id;
1392
1393 if (devid == devrev)
1394 /* simple heuristics, we happened to read some
1395 non-smsc register */
1396 return;
1397
1398 func=NULL;
1399 id=(devid<<8) | devrev;
1400
1401 if (id==0x0302) {type="37c669"; func=show_parconfig_smsc37c669;}
1402 else if (id==0x6582) type="37c665IR";
1403 else if (devid==0x65) type="37c665GT";
1404 else if (devid==0x66) type="37c666GT";
1405
1406 if (verbose_probing)
1407 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1408 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1409 efer, key, devid, devrev, type);
1410
1411 if (func)
1412 func(efer,key);
1413}
1414
1415
1416static void __devinit winbond_check(int io, int key)
1417{
1418 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1419
1420 if (!request_region(io, 3, __FUNCTION__))
1421 return;
1422
1423 /* First probe without key */
1424 outb(0x20,io);
1425 x_devid=inb(io+1);
1426 outb(0x21,io);
1427 x_devrev=inb(io+1);
1428 outb(0x09,io);
1429 x_oldid=inb(io+1);
1430
1431 outb(key,io);
1432 outb(key,io); /* Write Magic Sequence to EFER, extended
1433 funtion enable register */
1434 outb(0x20,io); /* Write EFIR, extended function index register */
1435 devid=inb(io+1); /* Read EFDR, extended function data register */
1436 outb(0x21,io);
1437 devrev=inb(io+1);
1438 outb(0x09,io);
1439 oldid=inb(io+1);
1440 outb(0xaa,io); /* Magic Seal */
1441
1442 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1443 goto out; /* protection against false positives */
1444
1445 decode_winbond(io,key,devid,devrev,oldid);
1446out:
1447 release_region(io, 3);
1448}
1449
1450static void __devinit winbond_check2(int io,int key)
1451{
1452 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1453
1454 if (!request_region(io, 3, __FUNCTION__))
1455 return;
1456
1457 /* First probe without the key */
1458 outb(0x20,io+2);
1459 x_devid=inb(io+2);
1460 outb(0x21,io+1);
1461 x_devrev=inb(io+2);
1462 outb(0x09,io+1);
1463 x_oldid=inb(io+2);
1464
1465 outb(key,io); /* Write Magic Byte to EFER, extended
1466 funtion enable register */
1467 outb(0x20,io+2); /* Write EFIR, extended function index register */
1468 devid=inb(io+2); /* Read EFDR, extended function data register */
1469 outb(0x21,io+1);
1470 devrev=inb(io+2);
1471 outb(0x09,io+1);
1472 oldid=inb(io+2);
1473 outb(0xaa,io); /* Magic Seal */
1474
1475 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1476 goto out; /* protection against false positives */
1477
1478 decode_winbond(io,key,devid,devrev,oldid);
1479out:
1480 release_region(io, 3);
1481}
1482
1483static void __devinit smsc_check(int io, int key)
1484{
1485 int id,rev,oldid,oldrev,x_id,x_rev,x_oldid,x_oldrev;
1486
1487 if (!request_region(io, 3, __FUNCTION__))
1488 return;
1489
1490 /* First probe without the key */
1491 outb(0x0d,io);
1492 x_oldid=inb(io+1);
1493 outb(0x0e,io);
1494 x_oldrev=inb(io+1);
1495 outb(0x20,io);
1496 x_id=inb(io+1);
1497 outb(0x21,io);
1498 x_rev=inb(io+1);
1499
1500 outb(key,io);
1501 outb(key,io); /* Write Magic Sequence to EFER, extended
1502 funtion enable register */
1503 outb(0x0d,io); /* Write EFIR, extended function index register */
1504 oldid=inb(io+1); /* Read EFDR, extended function data register */
1505 outb(0x0e,io);
1506 oldrev=inb(io+1);
1507 outb(0x20,io);
1508 id=inb(io+1);
1509 outb(0x21,io);
1510 rev=inb(io+1);
1511 outb(0xaa,io); /* Magic Seal */
1512
1513 if ((x_id == id) && (x_oldrev == oldrev) &&
1514 (x_oldid == oldid) && (x_rev == rev))
1515 goto out; /* protection against false positives */
1516
1517 decode_smsc(io,key,oldid,oldrev);
1518out:
1519 release_region(io, 3);
1520}
1521
1522
1523static void __devinit detect_and_report_winbond (void)
1524{
1525 if (verbose_probing)
1526 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1527 winbond_check(0x3f0,0x87);
1528 winbond_check(0x370,0x87);
1529 winbond_check(0x2e ,0x87);
1530 winbond_check(0x4e ,0x87);
1531 winbond_check(0x3f0,0x86);
1532 winbond_check2(0x250,0x88);
1533 winbond_check2(0x250,0x89);
1534}
1535
1536static void __devinit detect_and_report_smsc (void)
1537{
1538 if (verbose_probing)
1539 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1540 smsc_check(0x3f0,0x55);
1541 smsc_check(0x370,0x55);
1542 smsc_check(0x3f0,0x44);
1543 smsc_check(0x370,0x44);
1544}
1545#endif /* CONFIG_PARPORT_PC_SUPERIO */
1546
1547static int __devinit get_superio_dma (struct parport *p)
1548{
1549 int i=0;
1550 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1551 i++;
1552 if (i!=NR_SUPERIOS)
1553 return superios[i].dma;
1554 return PARPORT_DMA_NONE;
1555}
1556
1557static int __devinit get_superio_irq (struct parport *p)
1558{
1559 int i=0;
1560 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1561 i++;
1562 if (i!=NR_SUPERIOS)
1563 return superios[i].irq;
1564 return PARPORT_IRQ_NONE;
1565}
1566
1567
1568/* --- Mode detection ------------------------------------- */
1569
1570/*
1571 * Checks for port existence, all ports support SPP MODE
1572 * Returns:
1573 * 0 : No parallel port at this address
1574 * PARPORT_MODE_PCSPP : SPP port detected
1575 * (if the user specified an ioport himself,
1576 * this shall always be the case!)
1577 *
1578 */
1579static int __devinit parport_SPP_supported(struct parport *pb)
1580{
1581 unsigned char r, w;
1582
1583 /*
1584 * first clear an eventually pending EPP timeout
1585 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1586 * that does not even respond to SPP cycles if an EPP
1587 * timeout is pending
1588 */
1589 clear_epp_timeout(pb);
1590
1591 /* Do a simple read-write test to make sure the port exists. */
1592 w = 0xc;
1593 outb (w, CONTROL (pb));
1594
1595 /* Is there a control register that we can read from? Some
1596 * ports don't allow reads, so read_control just returns a
1597 * software copy. Some ports _do_ allow reads, so bypass the
1598 * software copy here. In addition, some bits aren't
1599 * writable. */
1600 r = inb (CONTROL (pb));
1601 if ((r & 0xf) == w) {
1602 w = 0xe;
1603 outb (w, CONTROL (pb));
1604 r = inb (CONTROL (pb));
1605 outb (0xc, CONTROL (pb));
1606 if ((r & 0xf) == w)
1607 return PARPORT_MODE_PCSPP;
1608 }
1609
1610 if (user_specified)
1611 /* That didn't work, but the user thinks there's a
1612 * port here. */
1613 printk (KERN_INFO "parport 0x%lx (WARNING): CTR: "
1614 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1615
1616 /* Try the data register. The data lines aren't tri-stated at
1617 * this stage, so we expect back what we wrote. */
1618 w = 0xaa;
1619 parport_pc_write_data (pb, w);
1620 r = parport_pc_read_data (pb);
1621 if (r == w) {
1622 w = 0x55;
1623 parport_pc_write_data (pb, w);
1624 r = parport_pc_read_data (pb);
1625 if (r == w)
1626 return PARPORT_MODE_PCSPP;
1627 }
1628
1629 if (user_specified) {
1630 /* Didn't work, but the user is convinced this is the
1631 * place. */
1632 printk (KERN_INFO "parport 0x%lx (WARNING): DATA: "
1633 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1634 printk (KERN_INFO "parport 0x%lx: You gave this address, "
1635 "but there is probably no parallel port there!\n",
1636 pb->base);
1637 }
1638
1639 /* It's possible that we can't read the control register or
1640 * the data register. In that case just believe the user. */
1641 if (user_specified)
1642 return PARPORT_MODE_PCSPP;
1643
1644 return 0;
1645}
1646
1647/* Check for ECR
1648 *
1649 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1650 * on these cards actually accesses the CTR.
1651 *
1652 * Modern cards don't do this but reading from ECR will return 0xff
1653 * regardless of what is written here if the card does NOT support
1654 * ECP.
1655 *
1656 * We first check to see if ECR is the same as CTR. If not, the low
1657 * two bits of ECR aren't writable, so we check by writing ECR and
1658 * reading it back to see if it's what we expect.
1659 */
1660static int __devinit parport_ECR_present(struct parport *pb)
1661{
1662 struct parport_pc_private *priv = pb->private_data;
1663 unsigned char r = 0xc;
1664
1665 outb (r, CONTROL (pb));
1666 if ((inb (ECONTROL (pb)) & 0x3) == (r & 0x3)) {
1667 outb (r ^ 0x2, CONTROL (pb)); /* Toggle bit 1 */
1668
1669 r = inb (CONTROL (pb));
1670 if ((inb (ECONTROL (pb)) & 0x2) == (r & 0x2))
1671 goto no_reg; /* Sure that no ECR register exists */
1672 }
1673
1674 if ((inb (ECONTROL (pb)) & 0x3 ) != 0x1)
1675 goto no_reg;
1676
1677 ECR_WRITE (pb, 0x34);
1678 if (inb (ECONTROL (pb)) != 0x35)
1679 goto no_reg;
1680
1681 priv->ecr = 1;
1682 outb (0xc, CONTROL (pb));
1683
1684 /* Go to mode 000 */
1685 frob_set_mode (pb, ECR_SPP);
1686
1687 return 1;
1688
1689 no_reg:
1690 outb (0xc, CONTROL (pb));
1691 return 0;
1692}
1693
1694#ifdef CONFIG_PARPORT_1284
1695/* Detect PS/2 support.
1696 *
1697 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1698 * allows us to read data from the data lines. In theory we would get back
1699 * 0xff but any peripheral attached to the port may drag some or all of the
1700 * lines down to zero. So if we get back anything that isn't the contents
1701 * of the data register we deem PS/2 support to be present.
1702 *
1703 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1704 * drivers, but an external peripheral with sufficiently beefy drivers of
1705 * its own can overpower them and assert its own levels onto the bus, from
1706 * where they can then be read back as normal. Ports with this property
1707 * and the right type of device attached are likely to fail the SPP test,
1708 * (as they will appear to have stuck bits) and so the fact that they might
1709 * be misdetected here is rather academic.
1710 */
1711
1712static int __devinit parport_PS2_supported(struct parport *pb)
1713{
1714 int ok = 0;
1715
1716 clear_epp_timeout(pb);
1717
1718 /* try to tri-state the buffer */
1719 parport_pc_data_reverse (pb);
1720
1721 parport_pc_write_data(pb, 0x55);
1722 if (parport_pc_read_data(pb) != 0x55) ok++;
1723
1724 parport_pc_write_data(pb, 0xaa);
1725 if (parport_pc_read_data(pb) != 0xaa) ok++;
1726
1727 /* cancel input mode */
1728 parport_pc_data_forward (pb);
1729
1730 if (ok) {
1731 pb->modes |= PARPORT_MODE_TRISTATE;
1732 } else {
1733 struct parport_pc_private *priv = pb->private_data;
1734 priv->ctr_writable &= ~0x20;
1735 }
1736
1737 return ok;
1738}
1739
1740#ifdef CONFIG_PARPORT_PC_FIFO
1741static int __devinit parport_ECP_supported(struct parport *pb)
1742{
1743 int i;
1744 int config, configb;
1745 int pword;
1746 struct parport_pc_private *priv = pb->private_data;
1747 /* Translate ECP intrLine to ISA irq value */
1748 static const int intrline[]= { 0, 7, 9, 10, 11, 14, 15, 5 };
1749
1750 /* If there is no ECR, we have no hope of supporting ECP. */
1751 if (!priv->ecr)
1752 return 0;
1753
1754 /* Find out FIFO depth */
1755 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1756 ECR_WRITE (pb, ECR_TST << 5); /* TEST FIFO */
1757 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02); i++)
1758 outb (0xaa, FIFO (pb));
1759
1760 /*
1761 * Using LGS chipset it uses ECR register, but
1762 * it doesn't support ECP or FIFO MODE
1763 */
1764 if (i == 1024) {
1765 ECR_WRITE (pb, ECR_SPP << 5);
1766 return 0;
1767 }
1768
1769 priv->fifo_depth = i;
1770 if (verbose_probing)
1771 printk (KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1772
1773 /* Find out writeIntrThreshold */
1774 frob_econtrol (pb, 1<<2, 1<<2);
1775 frob_econtrol (pb, 1<<2, 0);
1776 for (i = 1; i <= priv->fifo_depth; i++) {
1777 inb (FIFO (pb));
1778 udelay (50);
1779 if (inb (ECONTROL (pb)) & (1<<2))
1780 break;
1781 }
1782
1783 if (i <= priv->fifo_depth) {
1784 if (verbose_probing)
1785 printk (KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1786 pb->base, i);
1787 } else
1788 /* Number of bytes we know we can write if we get an
1789 interrupt. */
1790 i = 0;
1791
1792 priv->writeIntrThreshold = i;
1793
1794 /* Find out readIntrThreshold */
1795 frob_set_mode (pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1796 parport_pc_data_reverse (pb); /* Must be in PS2 mode */
1797 frob_set_mode (pb, ECR_TST); /* Test FIFO */
1798 frob_econtrol (pb, 1<<2, 1<<2);
1799 frob_econtrol (pb, 1<<2, 0);
1800 for (i = 1; i <= priv->fifo_depth; i++) {
1801 outb (0xaa, FIFO (pb));
1802 if (inb (ECONTROL (pb)) & (1<<2))
1803 break;
1804 }
1805
1806 if (i <= priv->fifo_depth) {
1807 if (verbose_probing)
1808 printk (KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1809 pb->base, i);
1810 } else
1811 /* Number of bytes we can read if we get an interrupt. */
1812 i = 0;
1813
1814 priv->readIntrThreshold = i;
1815
1816 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1817 ECR_WRITE (pb, 0xf4); /* Configuration mode */
1818 config = inb (CONFIGA (pb));
1819 pword = (config >> 4) & 0x7;
1820 switch (pword) {
1821 case 0:
1822 pword = 2;
1823 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1824 pb->base);
1825 break;
1826 case 2:
1827 pword = 4;
1828 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1829 pb->base);
1830 break;
1831 default:
1832 printk (KERN_WARNING "0x%lx: Unknown implementation ID\n",
1833 pb->base);
1834 /* Assume 1 */
1835 case 1:
1836 pword = 1;
1837 }
1838 priv->pword = pword;
1839
1840 if (verbose_probing) {
1841 printk (KERN_DEBUG "0x%lx: PWord is %d bits\n", pb->base, 8 * pword);
1842
1843 printk (KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1844 config & 0x80 ? "Level" : "Pulses");
1845
1846 configb = inb (CONFIGB (pb));
1847 printk (KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1848 pb->base, config, configb);
1849 printk (KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1850 if ((configb >>3) & 0x07)
1851 printk("%d",intrline[(configb >>3) & 0x07]);
1852 else
1853 printk("<none or set by other means>");
1854 printk (" dma=");
1855 if( (configb & 0x03 ) == 0x00)
1856 printk("<none or set by other means>\n");
1857 else
1858 printk("%d\n",configb & 0x07);
1859 }
1860
1861 /* Go back to mode 000 */
1862 frob_set_mode (pb, ECR_SPP);
1863
1864 return 1;
1865}
1866#endif
1867
1868static int __devinit parport_ECPPS2_supported(struct parport *pb)
1869{
1870 const struct parport_pc_private *priv = pb->private_data;
1871 int result;
1872 unsigned char oecr;
1873
1874 if (!priv->ecr)
1875 return 0;
1876
1877 oecr = inb (ECONTROL (pb));
1878 ECR_WRITE (pb, ECR_PS2 << 5);
1879 result = parport_PS2_supported(pb);
1880 ECR_WRITE (pb, oecr);
1881 return result;
1882}
1883
1884/* EPP mode detection */
1885
1886static int __devinit parport_EPP_supported(struct parport *pb)
1887{
1888 const struct parport_pc_private *priv = pb->private_data;
1889
1890 /*
1891 * Theory:
1892 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1893 * when EPP is possible and is set high when an EPP timeout
1894 * occurs (EPP uses the HALT line to stop the CPU while it does
1895 * the byte transfer, an EPP timeout occurs if the attached
1896 * device fails to respond after 10 micro seconds).
1897 *
1898 * This bit is cleared by either reading it (National Semi)
1899 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1900 * This bit is always high in non EPP modes.
1901 */
1902
1903 /* If EPP timeout bit clear then EPP available */
1904 if (!clear_epp_timeout(pb)) {
1905 return 0; /* No way to clear timeout */
1906 }
1907
1908 /* Check for Intel bug. */
1909 if (priv->ecr) {
1910 unsigned char i;
1911 for (i = 0x00; i < 0x80; i += 0x20) {
1912 ECR_WRITE (pb, i);
1913 if (clear_epp_timeout (pb)) {
1914 /* Phony EPP in ECP. */
1915 return 0;
1916 }
1917 }
1918 }
1919
1920 pb->modes |= PARPORT_MODE_EPP;
1921
1922 /* Set up access functions to use EPP hardware. */
1923 pb->ops->epp_read_data = parport_pc_epp_read_data;
1924 pb->ops->epp_write_data = parport_pc_epp_write_data;
1925 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1926 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1927
1928 return 1;
1929}
1930
1931static int __devinit parport_ECPEPP_supported(struct parport *pb)
1932{
1933 struct parport_pc_private *priv = pb->private_data;
1934 int result;
1935 unsigned char oecr;
1936
1937 if (!priv->ecr) {
1938 return 0;
1939 }
1940
1941 oecr = inb (ECONTROL (pb));
1942 /* Search for SMC style EPP+ECP mode */
1943 ECR_WRITE (pb, 0x80);
1944 outb (0x04, CONTROL (pb));
1945 result = parport_EPP_supported(pb);
1946
1947 ECR_WRITE (pb, oecr);
1948
1949 if (result) {
1950 /* Set up access functions to use ECP+EPP hardware. */
1951 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1952 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1953 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1954 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1955 }
1956
1957 return result;
1958}
1959
1960#else /* No IEEE 1284 support */
1961
1962/* Don't bother probing for modes we know we won't use. */
1963static int __devinit parport_PS2_supported(struct parport *pb) { return 0; }
1964#ifdef CONFIG_PARPORT_PC_FIFO
1965static int __devinit parport_ECP_supported(struct parport *pb) { return 0; }
1966#endif
1967static int __devinit parport_EPP_supported(struct parport *pb) { return 0; }
1968static int __devinit parport_ECPEPP_supported(struct parport *pb){return 0;}
1969static int __devinit parport_ECPPS2_supported(struct parport *pb){return 0;}
1970
1971#endif /* No IEEE 1284 support */
1972
1973/* --- IRQ detection -------------------------------------- */
1974
1975/* Only if supports ECP mode */
1976static int __devinit programmable_irq_support(struct parport *pb)
1977{
1978 int irq, intrLine;
1979 unsigned char oecr = inb (ECONTROL (pb));
1980 static const int lookup[8] = {
1981 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1982 };
1983
1984 ECR_WRITE (pb, ECR_CNF << 5); /* Configuration MODE */
1985
1986 intrLine = (inb (CONFIGB (pb)) >> 3) & 0x07;
1987 irq = lookup[intrLine];
1988
1989 ECR_WRITE (pb, oecr);
1990 return irq;
1991}
1992
1993static int __devinit irq_probe_ECP(struct parport *pb)
1994{
1995 int i;
1996 unsigned long irqs;
1997
1998 irqs = probe_irq_on();
1999
2000 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
2001 ECR_WRITE (pb, (ECR_TST << 5) | 0x04);
2002 ECR_WRITE (pb, ECR_TST << 5);
2003
2004 /* If Full FIFO sure that writeIntrThreshold is generated */
2005 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02) ; i++)
2006 outb (0xaa, FIFO (pb));
2007
2008 pb->irq = probe_irq_off(irqs);
2009 ECR_WRITE (pb, ECR_SPP << 5);
2010
2011 if (pb->irq <= 0)
2012 pb->irq = PARPORT_IRQ_NONE;
2013
2014 return pb->irq;
2015}
2016
2017/*
2018 * This detection seems that only works in National Semiconductors
2019 * This doesn't work in SMC, LGS, and Winbond
2020 */
2021static int __devinit irq_probe_EPP(struct parport *pb)
2022{
2023#ifndef ADVANCED_DETECT
2024 return PARPORT_IRQ_NONE;
2025#else
2026 int irqs;
2027 unsigned char oecr;
2028
2029 if (pb->modes & PARPORT_MODE_PCECR)
2030 oecr = inb (ECONTROL (pb));
2031
2032 irqs = probe_irq_on();
2033
2034 if (pb->modes & PARPORT_MODE_PCECR)
2035 frob_econtrol (pb, 0x10, 0x10);
2036
2037 clear_epp_timeout(pb);
2038 parport_pc_frob_control (pb, 0x20, 0x20);
2039 parport_pc_frob_control (pb, 0x10, 0x10);
2040 clear_epp_timeout(pb);
2041
2042 /* Device isn't expecting an EPP read
2043 * and generates an IRQ.
2044 */
2045 parport_pc_read_epp(pb);
2046 udelay(20);
2047
2048 pb->irq = probe_irq_off (irqs);
2049 if (pb->modes & PARPORT_MODE_PCECR)
2050 ECR_WRITE (pb, oecr);
2051 parport_pc_write_control(pb, 0xc);
2052
2053 if (pb->irq <= 0)
2054 pb->irq = PARPORT_IRQ_NONE;
2055
2056 return pb->irq;
2057#endif /* Advanced detection */
2058}
2059
2060static int __devinit irq_probe_SPP(struct parport *pb)
2061{
2062 /* Don't even try to do this. */
2063 return PARPORT_IRQ_NONE;
2064}
2065
2066/* We will attempt to share interrupt requests since other devices
2067 * such as sound cards and network cards seem to like using the
2068 * printer IRQs.
2069 *
2070 * When ECP is available we can autoprobe for IRQs.
2071 * NOTE: If we can autoprobe it, we can register the IRQ.
2072 */
2073static int __devinit parport_irq_probe(struct parport *pb)
2074{
2075 struct parport_pc_private *priv = pb->private_data;
2076
2077 if (priv->ecr) {
2078 pb->irq = programmable_irq_support(pb);
2079
2080 if (pb->irq == PARPORT_IRQ_NONE)
2081 pb->irq = irq_probe_ECP(pb);
2082 }
2083
2084 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
2085 (pb->modes & PARPORT_MODE_EPP))
2086 pb->irq = irq_probe_EPP(pb);
2087
2088 clear_epp_timeout(pb);
2089
2090 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
2091 pb->irq = irq_probe_EPP(pb);
2092
2093 clear_epp_timeout(pb);
2094
2095 if (pb->irq == PARPORT_IRQ_NONE)
2096 pb->irq = irq_probe_SPP(pb);
2097
2098 if (pb->irq == PARPORT_IRQ_NONE)
2099 pb->irq = get_superio_irq(pb);
2100
2101 return pb->irq;
2102}
2103
2104/* --- DMA detection -------------------------------------- */
2105
2106/* Only if chipset conforms to ECP ISA Interface Standard */
2107static int __devinit programmable_dma_support (struct parport *p)
2108{
2109 unsigned char oecr = inb (ECONTROL (p));
2110 int dma;
2111
2112 frob_set_mode (p, ECR_CNF);
2113
2114 dma = inb (CONFIGB(p)) & 0x07;
2115 /* 000: Indicates jumpered 8-bit DMA if read-only.
2116 100: Indicates jumpered 16-bit DMA if read-only. */
2117 if ((dma & 0x03) == 0)
2118 dma = PARPORT_DMA_NONE;
2119
2120 ECR_WRITE (p, oecr);
2121 return dma;
2122}
2123
2124static int __devinit parport_dma_probe (struct parport *p)
2125{
2126 const struct parport_pc_private *priv = p->private_data;
2127 if (priv->ecr)
2128 p->dma = programmable_dma_support(p); /* ask ECP chipset first */
2129 if (p->dma == PARPORT_DMA_NONE) {
2130 /* ask known Super-IO chips proper, although these
2131 claim ECP compatible, some don't report their DMA
2132 conforming to ECP standards */
2133 p->dma = get_superio_dma(p);
2134 }
2135
2136 return p->dma;
2137}
2138
2139/* --- Initialisation code -------------------------------- */
2140
2141static LIST_HEAD(ports_list);
2142static DEFINE_SPINLOCK(ports_lock);
2143
2144struct parport *parport_pc_probe_port (unsigned long int base,
2145 unsigned long int base_hi,
2146 int irq, int dma,
2147 struct pci_dev *dev)
2148{
2149 struct parport_pc_private *priv;
2150 struct parport_operations *ops;
2151 struct parport *p;
2152 int probedirq = PARPORT_IRQ_NONE;
2153 struct resource *base_res;
2154 struct resource *ECR_res = NULL;
2155 struct resource *EPP_res = NULL;
2156
2157 ops = kmalloc(sizeof (struct parport_operations), GFP_KERNEL);
2158 if (!ops)
2159 goto out1;
2160
2161 priv = kmalloc (sizeof (struct parport_pc_private), GFP_KERNEL);
2162 if (!priv)
2163 goto out2;
2164
2165 /* a misnomer, actually - it's allocate and reserve parport number */
2166 p = parport_register_port(base, irq, dma, ops);
2167 if (!p)
2168 goto out3;
2169
2170 base_res = request_region(base, 3, p->name);
2171 if (!base_res)
2172 goto out4;
2173
2174 memcpy(ops, &parport_pc_ops, sizeof (struct parport_operations));
2175 priv->ctr = 0xc;
2176 priv->ctr_writable = ~0x10;
2177 priv->ecr = 0;
2178 priv->fifo_depth = 0;
2179 priv->dma_buf = NULL;
2180 priv->dma_handle = 0;
2181 priv->dev = dev;
2182 INIT_LIST_HEAD(&priv->list);
2183 priv->port = p;
2184 p->base_hi = base_hi;
2185 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2186 p->private_data = priv;
2187
2188 if (base_hi) {
2189 ECR_res = request_region(base_hi, 3, p->name);
2190 if (ECR_res)
2191 parport_ECR_present(p);
2192 }
2193
2194 if (base != 0x3bc) {
2195 EPP_res = request_region(base+0x3, 5, p->name);
2196 if (EPP_res)
2197 if (!parport_EPP_supported(p))
2198 parport_ECPEPP_supported(p);
2199 }
2200 if (!parport_SPP_supported (p))
2201 /* No port. */
2202 goto out5;
2203 if (priv->ecr)
2204 parport_ECPPS2_supported(p);
2205 else
2206 parport_PS2_supported(p);
2207
2208 p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
2209
2210 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2211 if (p->base_hi && priv->ecr)
2212 printk(" (0x%lx)", p->base_hi);
2213 if (p->irq == PARPORT_IRQ_AUTO) {
2214 p->irq = PARPORT_IRQ_NONE;
2215 parport_irq_probe(p);
2216 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2217 p->irq = PARPORT_IRQ_NONE;
2218 parport_irq_probe(p);
2219 probedirq = p->irq;
2220 p->irq = PARPORT_IRQ_NONE;
2221 }
2222 if (p->irq != PARPORT_IRQ_NONE) {
2223 printk(", irq %d", p->irq);
2224 priv->ctr_writable |= 0x10;
2225
2226 if (p->dma == PARPORT_DMA_AUTO) {
2227 p->dma = PARPORT_DMA_NONE;
2228 parport_dma_probe(p);
2229 }
2230 }
2231 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2232 is mandatory (see above) */
2233 p->dma = PARPORT_DMA_NONE;
2234
2235#ifdef CONFIG_PARPORT_PC_FIFO
2236 if (parport_ECP_supported(p) &&
2237 p->dma != PARPORT_DMA_NOFIFO &&
2238 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2239 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2240 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2241#ifdef CONFIG_PARPORT_1284
2242 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2243 /* currently broken, but working on it.. (FB) */
2244 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2245#endif /* IEEE 1284 support */
2246 if (p->dma != PARPORT_DMA_NONE) {
2247 printk(", dma %d", p->dma);
2248 p->modes |= PARPORT_MODE_DMA;
2249 }
2250 else printk(", using FIFO");
2251 }
2252 else
2253 /* We can't use the DMA channel after all. */
2254 p->dma = PARPORT_DMA_NONE;
2255#endif /* Allowed to use FIFO/DMA */
2256
2257 printk(" [");
2258#define printmode(x) {if(p->modes&PARPORT_MODE_##x){printk("%s%s",f?",":"",#x);f++;}}
2259 {
2260 int f = 0;
2261 printmode(PCSPP);
2262 printmode(TRISTATE);
2263 printmode(COMPAT)
2264 printmode(EPP);
2265 printmode(ECP);
2266 printmode(DMA);
2267 }
2268#undef printmode
2269#ifndef CONFIG_PARPORT_1284
2270 printk ("(,...)");
2271#endif /* CONFIG_PARPORT_1284 */
2272 printk("]\n");
2273 if (probedirq != PARPORT_IRQ_NONE)
2274 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2275
2276 /* If No ECP release the ports grabbed above. */
2277 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2278 release_region(base_hi, 3);
2279 ECR_res = NULL;
2280 }
2281 /* Likewise for EEP ports */
2282 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2283 release_region(base+3, 5);
2284 EPP_res = NULL;
2285 }
2286 if (p->irq != PARPORT_IRQ_NONE) {
2287 if (request_irq (p->irq, parport_pc_interrupt,
2288 0, p->name, p)) {
2289 printk (KERN_WARNING "%s: irq %d in use, "
2290 "resorting to polled operation\n",
2291 p->name, p->irq);
2292 p->irq = PARPORT_IRQ_NONE;
2293 p->dma = PARPORT_DMA_NONE;
2294 }
2295
2296#ifdef CONFIG_PARPORT_PC_FIFO
7fbacd52 2297#ifdef HAS_DMA
1da177e4
LT		 2298 if (p->dma != PARPORT_DMA_NONE) {
2299 if (request_dma (p->dma, p->name)) {
2300 printk (KERN_WARNING "%s: dma %d in use, "
2301 "resorting to PIO operation\n",
2302 p->name, p->dma);
2303 p->dma = PARPORT_DMA_NONE;
2304 } else {
2305 priv->dma_buf =
2306 pci_alloc_consistent(priv->dev,
2307 PAGE_SIZE,
2308 &priv->dma_handle);
2309 if (! priv->dma_buf) {
2310 printk (KERN_WARNING "%s: "
2311 "cannot get buffer for DMA, "
2312 "resorting to PIO operation\n",
2313 p->name);
2314 free_dma(p->dma);
2315 p->dma = PARPORT_DMA_NONE;
2316 }
2317 }
2318 }
7fbacd52
AV		 2319#endif
2320#endif
1da177e4
LT		 2321 }
2322
2323 /* Done probing. Now put the port into a sensible start-up state. */
2324 if (priv->ecr)
2325 /*
2326 * Put the ECP detected port in PS2 mode.
2327 * Do this also for ports that have ECR but don't do ECP.
2328 */
2329 ECR_WRITE (p, 0x34);
2330
2331 parport_pc_write_data(p, 0);
2332 parport_pc_data_forward (p);
2333
2334 /* Now that we've told the sharing engine about the port, and
2335 found out its characteristics, let the high-level drivers
2336 know about it. */
2337 spin_lock(&ports_lock);
2338 list_add(&priv->list, &ports_list);
2339 spin_unlock(&ports_lock);
2340 parport_announce_port (p);
2341
2342 return p;
2343
2344out5:
2345 if (ECR_res)
2346 release_region(base_hi, 3);
2347 if (EPP_res)
2348 release_region(base+0x3, 5);
2349 release_region(base, 3);
2350out4:
2351 parport_put_port(p);
2352out3:
2353 kfree (priv);
2354out2:
2355 kfree (ops);
2356out1:
2357 return NULL;
2358}
2359
2360EXPORT_SYMBOL (parport_pc_probe_port);
2361
2362void parport_pc_unregister_port (struct parport *p)
2363{
2364 struct parport_pc_private *priv = p->private_data;
2365 struct parport_operations *ops = p->ops;
2366
2367 parport_remove_port(p);
2368 spin_lock(&ports_lock);
2369 list_del_init(&priv->list);
2370 spin_unlock(&ports_lock);
2371 if (p->dma != PARPORT_DMA_NONE)
2372 free_dma(p->dma);
2373 if (p->irq != PARPORT_IRQ_NONE)
2374 free_irq(p->irq, p);
2375 release_region(p->base, 3);
2376 if (p->size > 3)
2377 release_region(p->base + 3, p->size - 3);
2378 if (p->modes & PARPORT_MODE_ECP)
2379 release_region(p->base_hi, 3);
2380#ifdef CONFIG_PARPORT_PC_FIFO
7fbacd52 2381#ifdef HAS_DMA
1da177e4
LT		 2382 if (priv->dma_buf)
2383 pci_free_consistent(priv->dev, PAGE_SIZE,
2384 priv->dma_buf,
2385 priv->dma_handle);
7fbacd52
AV		 2386#endif
2387#endif
1da177e4
LT		 2388 kfree (p->private_data);
2389 parport_put_port(p);
2390 kfree (ops); /* hope no-one cached it */
2391}
2392
2393EXPORT_SYMBOL (parport_pc_unregister_port);
2394
2395#ifdef CONFIG_PCI
2396
2397/* ITE support maintained by Rich Liu <richliu@poorman.org> */
2398static int __devinit sio_ite_8872_probe (struct pci_dev *pdev, int autoirq,
2399 int autodma, struct parport_pc_via_data *via)
2400{
2401 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2402 struct resource *base_res;
2403 u32 ite8872set;
2404 u32 ite8872_lpt, ite8872_lpthi;
2405 u8 ite8872_irq, type;
2406 char *fake_name = "parport probe";
2407 int irq;
2408 int i;
2409
2410 DPRINTK (KERN_DEBUG "sio_ite_8872_probe()\n");
2411
2412 // make sure which one chip
2413 for(i = 0; i < 5; i++) {
2414 base_res = request_region(inta_addr[i], 0x8, fake_name);
2415 if (base_res) {
2416 int test;
2417 pci_write_config_dword (pdev, 0x60,
2418 0xe7000000 | inta_addr[i]);
2419 pci_write_config_dword (pdev, 0x78,
2420 0x00000000 | inta_addr[i]);
2421 test = inb (inta_addr[i]);
2422 if (test != 0xff) break;
2423 release_region(inta_addr[i], 0x8);
2424 }
2425 }
2426 if(i >= 5) {
2427 printk (KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2428 return 0;
2429 }
2430
2431 type = inb (inta_addr[i] + 0x18);
2432 type &= 0x0f;
2433
2434 switch (type) {
2435 case 0x2:
2436 printk (KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2437 ite8872set = 0x64200000;
2438 break;
2439 case 0xa:
2440 printk (KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2441 ite8872set = 0x64200000;
2442 break;
2443 case 0xe:
2444 printk (KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2445 ite8872set = 0x64e00000;
2446 break;
2447 case 0x6:
2448 printk (KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2449 return 0;
2450 case 0x8:
2451 DPRINTK (KERN_DEBUG "parport_pc: ITE8874 found (2S)\n");
2452 return 0;
2453 default:
2454 printk (KERN_INFO "parport_pc: unknown ITE887x\n");
2455 printk (KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2456 "output to Rich.Liu@ite.com.tw\n");
2457 return 0;
2458 }
2459
2460 pci_read_config_byte (pdev, 0x3c, &ite8872_irq);
2461 pci_read_config_dword (pdev, 0x1c, &ite8872_lpt);
2462 ite8872_lpt &= 0x0000ff00;
2463 pci_read_config_dword (pdev, 0x20, &ite8872_lpthi);
2464 ite8872_lpthi &= 0x0000ff00;
2465 pci_write_config_dword (pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2466 pci_write_config_dword (pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2467 pci_write_config_dword (pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2468 // SET SPP&EPP , Parallel Port NO DMA , Enable All Function
2469 // SET Parallel IRQ
2470 pci_write_config_dword (pdev, 0x9c,
2471 ite8872set | (ite8872_irq * 0x11111));
2472
2473 DPRINTK (KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2474 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2475 ite8872_lpt);
2476 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2477 ite8872_lpthi);
2478
2479 /* Let the user (or defaults) steer us away from interrupts */
2480 irq = ite8872_irq;
2481 if (autoirq != PARPORT_IRQ_AUTO)
2482 irq = PARPORT_IRQ_NONE;
2483
2484 /*
2485 * Release the resource so that parport_pc_probe_port can get it.
2486 */
2487 release_resource(base_res);
2488 if (parport_pc_probe_port (ite8872_lpt, ite8872_lpthi,
2489 irq, PARPORT_DMA_NONE, NULL)) {
2490 printk (KERN_INFO
2491 "parport_pc: ITE 8872 parallel port: io=0x%X",
2492 ite8872_lpt);
2493 if (irq != PARPORT_IRQ_NONE)
2494 printk (", irq=%d", irq);
2495 printk ("\n");
2496 return 1;
2497 }
2498
2499 return 0;
2500}
2501
2502/* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2503 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2504static int __devinitdata parport_init_mode = 0;
2505
2506/* Data for two known VIA chips */
2507static struct parport_pc_via_data via_686a_data __devinitdata = {
2508 0x51,
2509 0x50,
2510 0x85,
2511 0x02,
2512 0xE2,
2513 0xF0,
2514 0xE6
2515};
2516static struct parport_pc_via_data via_8231_data __devinitdata = {
2517 0x45,
2518 0x44,
2519 0x50,
2520 0x04,
2521 0xF2,
2522 0xFA,
2523 0xF6
2524};
2525
2526static int __devinit sio_via_probe (struct pci_dev *pdev, int autoirq,
2527 int autodma, struct parport_pc_via_data *via)
2528{
2529 u8 tmp, tmp2, siofunc;
2530 u8 ppcontrol = 0;
2531 int dma, irq;
2532 unsigned port1, port2;
2533 unsigned have_epp = 0;
2534
2535 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2536
2537 switch(parport_init_mode)
2538 {
2539 case 1:
2540 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2541 siofunc = VIA_FUNCTION_PARPORT_SPP;
2542 break;
2543 case 2:
2544 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2545 siofunc = VIA_FUNCTION_PARPORT_SPP;
2546 ppcontrol = VIA_PARPORT_BIDIR;
2547 break;
2548 case 3:
2549 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2550 siofunc = VIA_FUNCTION_PARPORT_EPP;
2551 ppcontrol = VIA_PARPORT_BIDIR;
2552 have_epp = 1;
2553 break;
2554 case 4:
2555 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2556 siofunc = VIA_FUNCTION_PARPORT_ECP;
2557 ppcontrol = VIA_PARPORT_BIDIR;
2558 break;
2559 case 5:
2560 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2561 siofunc = VIA_FUNCTION_PARPORT_ECP;
2562 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2563 have_epp = 1;
2564 break;
2565 default:
2566 printk(KERN_DEBUG "parport_pc: probing current configuration\n");
2567 siofunc = VIA_FUNCTION_PROBE;
2568 break;
2569 }
2570 /*
2571 * unlock super i/o configuration
2572 */
2573 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2574 tmp |= via->via_pci_superio_config_data;
2575 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2576
2577 /* Bits 1-0: Parallel Port Mode / Enable */
2578 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2579 tmp = inb (VIA_CONFIG_DATA);
2580 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2581 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2582 tmp2 = inb (VIA_CONFIG_DATA);
2583 if (siofunc == VIA_FUNCTION_PROBE)
2584 {
2585 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2586 ppcontrol = tmp2;
2587 }
2588 else
2589 {
2590 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2591 tmp |= siofunc;
2592 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2593 outb(tmp, VIA_CONFIG_DATA);
2594 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2595 tmp2 |= ppcontrol;
2596 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2597 outb(tmp2, VIA_CONFIG_DATA);
2598 }
2599
2600 /* Parallel Port I/O Base Address, bits 9-2 */
2601 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2602 port1 = inb(VIA_CONFIG_DATA) << 2;
2603
2604 printk (KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",port1);
2605 if ((port1 == 0x3BC) && have_epp)
2606 {
2607 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2608 outb((0x378 >> 2), VIA_CONFIG_DATA);
2609 printk(KERN_DEBUG "parport_pc: Parallel port base changed to 0x378\n");
2610 port1 = 0x378;
2611 }
2612
2613 /*
2614 * lock super i/o configuration
2615 */
2616 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2617 tmp &= ~via->via_pci_superio_config_data;
2618 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2619
2620 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2621 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2622 return 0;
2623 }
2624
2625 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2626 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2627 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2628
2629 if (siofunc == VIA_FUNCTION_PARPORT_ECP)
2630 {
2631 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2632 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2633 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2634 }
2635 else
2636 /* if ECP not enabled, DMA is not enabled, assumed bogus 'dma' value */
2637 dma = PARPORT_DMA_NONE;
2638
2639 /* Let the user (or defaults) steer us away from interrupts and DMA */
2640 if (autoirq == PARPORT_IRQ_NONE) {
2641 irq = PARPORT_IRQ_NONE;
2642 dma = PARPORT_DMA_NONE;
2643 }
2644 if (autodma == PARPORT_DMA_NONE)
2645 dma = PARPORT_DMA_NONE;
2646
2647 switch (port1) {
2648 case 0x3bc: port2 = 0x7bc; break;
2649 case 0x378: port2 = 0x778; break;
2650 case 0x278: port2 = 0x678; break;
2651 default:
2652 printk(KERN_INFO "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2653 port1);
2654 return 0;
2655 }
2656
2657 /* filter bogus IRQs */
2658 switch (irq) {
2659 case 0:
2660 case 2:
2661 case 8:
2662 case 13:
2663 irq = PARPORT_IRQ_NONE;
2664 break;
2665
2666 default: /* do nothing */
2667 break;
2668 }
2669
2670 /* finally, do the probe with values obtained */
2671 if (parport_pc_probe_port (port1, port2, irq, dma, NULL)) {
2672 printk (KERN_INFO
2673 "parport_pc: VIA parallel port: io=0x%X", port1);
2674 if (irq != PARPORT_IRQ_NONE)
2675 printk (", irq=%d", irq);
2676 if (dma != PARPORT_DMA_NONE)
2677 printk (", dma=%d", dma);
2678 printk ("\n");
2679 return 1;
2680 }
2681
2682 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2683 port1, irq, dma);
2684 return 0;
2685}
2686
2687
2688enum parport_pc_sio_types {
2689 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2690 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2691 sio_ite_8872,
2692 last_sio
2693};
2694
2695/* each element directly indexed from enum list, above */
2696static struct parport_pc_superio {
2697 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma, struct parport_pc_via_data *via);
2698 struct parport_pc_via_data *via;
2699} parport_pc_superio_info[] __devinitdata = {
2700 { sio_via_probe, &via_686a_data, },
2701 { sio_via_probe, &via_8231_data, },
2702 { sio_ite_8872_probe, NULL, },
2703};
2704
2705enum parport_pc_pci_cards {
2706 siig_1p_10x = last_sio,
2707 siig_2p_10x,
2708 siig_1p_20x,
2709 siig_2p_20x,
2710 lava_parallel,
2711 lava_parallel_dual_a,
2712 lava_parallel_dual_b,
2713 boca_ioppar,
2714 plx_9050,
2715 timedia_4078a,
2716 timedia_4079h,
2717 timedia_4085h,
2718 timedia_4088a,
2719 timedia_4089a,
2720 timedia_4095a,
2721 timedia_4096a,
2722 timedia_4078u,
2723 timedia_4079a,
2724 timedia_4085u,
2725 timedia_4079r,
2726 timedia_4079s,
2727 timedia_4079d,
2728 timedia_4079e,
2729 timedia_4079f,
2730 timedia_9079a,
2731 timedia_9079b,
2732 timedia_9079c,
2733 timedia_4006a,
2734 timedia_4014,
2735 timedia_4008a,
2736 timedia_4018,
2737 timedia_9018a,
2738 syba_2p_epp,
2739 syba_1p_ecp,
2740 titan_010l,
85747f03 2741 titan_1284p1,
1da177e4
LT		 2742 titan_1284p2,
2743 avlab_1p,
2744 avlab_2p,
2745 oxsemi_954,
2746 oxsemi_840,
2747 aks_0100,
2748 mobility_pp,
2749 netmos_9705,
2750 netmos_9715,
2751 netmos_9755,
2752 netmos_9805,
2753 netmos_9815,
1da177e4
LT		 2754};
2755
2756
2757/* each element directly indexed from enum list, above
2758 * (but offset by last_sio) */
2759static struct parport_pc_pci {
2760 int numports;
2761 struct { /* BAR (base address registers) numbers in the config
2762 space header */
2763 int lo;
2764 int hi; /* -1 if not there, >6 for offset-method (max
2765 BAR is 6) */
2766 } addr[4];
2767
2768 /* If set, this is called immediately after pci_enable_device.
2769 * If it returns non-zero, no probing will take place and the
2770 * ports will not be used. */
2771 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2772
2773 /* If set, this is called after probing for ports. If 'failed'
2774 * is non-zero we couldn't use any of the ports. */
2775 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2776} cards[] __devinitdata = {
2777 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2778 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2779 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2780 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2781 /* lava_parallel */ { 1, { { 0, -1 }, } },
2782 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2783 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2784 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2785 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2786 /* timedia_4078a */ { 1, { { 2, -1 }, } },
2787 /* timedia_4079h */ { 1, { { 2, 3 }, } },
2788 /* timedia_4085h */ { 2, { { 2, -1 }, { 4, -1 }, } },
2789 /* timedia_4088a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2790 /* timedia_4089a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2791 /* timedia_4095a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2792 /* timedia_4096a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2793 /* timedia_4078u */ { 1, { { 2, -1 }, } },
2794 /* timedia_4079a */ { 1, { { 2, 3 }, } },
2795 /* timedia_4085u */ { 2, { { 2, -1 }, { 4, -1 }, } },
2796 /* timedia_4079r */ { 1, { { 2, 3 }, } },
2797 /* timedia_4079s */ { 1, { { 2, 3 }, } },
2798 /* timedia_4079d */ { 1, { { 2, 3 }, } },
2799 /* timedia_4079e */ { 1, { { 2, 3 }, } },
2800 /* timedia_4079f */ { 1, { { 2, 3 }, } },
2801 /* timedia_9079a */ { 1, { { 2, 3 }, } },
2802 /* timedia_9079b */ { 1, { { 2, 3 }, } },
2803 /* timedia_9079c */ { 1, { { 2, 3 }, } },
2804 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2805 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2806 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2807 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2808 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2809 /* SYBA uses fixed offsets in
2810 a 1K io window */
2811 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2812 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2813 /* titan_010l */ { 1, { { 3, -1 }, } },
85747f03 2814 /* titan_1284p1 */ { 1, { { 0, 1 }, } },
1da177e4
LT		 2815 /* titan_1284p2 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2816 /* avlab_1p */ { 1, { { 0, 1}, } },
2817 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2818 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2819 * and 840 locks up if you write 1 to bit 2! */
2820 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2821 /* oxsemi_840 */ { 1, { { 0, -1 }, } },
2822 /* aks_0100 */ { 1, { { 0, -1 }, } },
2823 /* mobility_pp */ { 1, { { 0, 1 }, } },
2824 /* netmos_9705 */ { 1, { { 0, -1 }, } }, /* untested */
2825 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2826 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2827 /* netmos_9805 */ { 1, { { 0, -1 }, } }, /* untested */
2828 /* netmos_9815 */ { 2, { { 0, -1 }, { 2, -1 }, } }, /* untested */
1da177e4
LT		 2829};
2830
2831static struct pci_device_id parport_pc_pci_tbl[] = {
2832 /* Super-IO onboard chips */
2833 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2834 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2835 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2836 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2837
2838 /* PCI cards */
2839 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2840 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2841 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2842 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2843 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2844 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2845 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2846 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2847 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2848 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2849 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2850 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2851 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2852 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2853 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2854 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2855 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2856 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0,0, plx_9050 },
2857 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2858 { 0x1409, 0x7168, 0x1409, 0x4078, 0, 0, timedia_4078a },
2859 { 0x1409, 0x7168, 0x1409, 0x4079, 0, 0, timedia_4079h },
2860 { 0x1409, 0x7168, 0x1409, 0x4085, 0, 0, timedia_4085h },
2861 { 0x1409, 0x7168, 0x1409, 0x4088, 0, 0, timedia_4088a },
2862 { 0x1409, 0x7168, 0x1409, 0x4089, 0, 0, timedia_4089a },
2863 { 0x1409, 0x7168, 0x1409, 0x4095, 0, 0, timedia_4095a },
2864 { 0x1409, 0x7168, 0x1409, 0x4096, 0, 0, timedia_4096a },
2865 { 0x1409, 0x7168, 0x1409, 0x5078, 0, 0, timedia_4078u },
2866 { 0x1409, 0x7168, 0x1409, 0x5079, 0, 0, timedia_4079a },
2867 { 0x1409, 0x7168, 0x1409, 0x5085, 0, 0, timedia_4085u },
2868 { 0x1409, 0x7168, 0x1409, 0x6079, 0, 0, timedia_4079r },
2869 { 0x1409, 0x7168, 0x1409, 0x7079, 0, 0, timedia_4079s },
2870 { 0x1409, 0x7168, 0x1409, 0x8079, 0, 0, timedia_4079d },
2871 { 0x1409, 0x7168, 0x1409, 0x9079, 0, 0, timedia_4079e },
2872 { 0x1409, 0x7168, 0x1409, 0xa079, 0, 0, timedia_4079f },
2873 { 0x1409, 0x7168, 0x1409, 0xb079, 0, 0, timedia_9079a },
2874 { 0x1409, 0x7168, 0x1409, 0xc079, 0, 0, timedia_9079b },
2875 { 0x1409, 0x7168, 0x1409, 0xd079, 0, 0, timedia_9079c },
2876 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2877 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2878 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2879 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2880 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2881 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2882 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2883 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2884 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2885 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2886 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2887 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
85747f03 2888 { 0x9710, 0x9805, 0x1000, 0x0010, 0, 0, titan_1284p1 },
1da177e4
LT		 2889 { 0x9710, 0x9815, 0x1000, 0x0020, 0, 0, titan_1284p2 },
2890 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2891 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p}, /* AFAVLAB_TK9902 */
2892 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2893 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2894 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2895 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2896 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2897 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2898 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2899 /* NetMos communication controllers */
2900 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2901 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2902 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2903 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2904 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2905 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2906 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2907 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2908 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2909 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
1da177e4
LT		 2910 { 0, } /* terminate list */
2911};
2912MODULE_DEVICE_TABLE(pci,parport_pc_pci_tbl);
2913
2914struct pci_parport_data {
2915 int num;
2916 struct parport *ports[2];
2917};
2918
2919static int parport_pc_pci_probe (struct pci_dev *dev,
2920 const struct pci_device_id *id)
2921{
2922 int err, count, n, i = id->driver_data;
2923 struct pci_parport_data *data;
2924
2925 if (i < last_sio)
2926 /* This is an onboard Super-IO and has already been probed */
2927 return 0;
2928
2929 /* This is a PCI card */
2930 i -= last_sio;
2931 count = 0;
2932 if ((err = pci_enable_device (dev)) != 0)
2933 return err;
2934
2935 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2936 if (!data)
2937 return -ENOMEM;
2938
2939 if (cards[i].preinit_hook &&
2940 cards[i].preinit_hook (dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2941 kfree(data);
2942 return -ENODEV;
2943 }
2944
2945 for (n = 0; n < cards[i].numports; n++) {
2946 int lo = cards[i].addr[n].lo;
2947 int hi = cards[i].addr[n].hi;
2948 unsigned long io_lo, io_hi;
2949 io_lo = pci_resource_start (dev, lo);
2950 io_hi = 0;
2951 if ((hi >= 0) && (hi <= 6))
2952 io_hi = pci_resource_start (dev, hi);
2953 else if (hi > 6)
2954 io_lo += hi; /* Reinterpret the meaning of
2955 "hi" as an offset (see SYBA
2956 def.) */
2957 /* TODO: test if sharing interrupts works */
2958 printk (KERN_DEBUG "PCI parallel port detected: %04x:%04x, "
2959 "I/O at %#lx(%#lx)\n",
2960 parport_pc_pci_tbl[i + last_sio].vendor,
2961 parport_pc_pci_tbl[i + last_sio].device, io_lo, io_hi);
2962 data->ports[count] =
2963 parport_pc_probe_port (io_lo, io_hi, PARPORT_IRQ_NONE,
2964 PARPORT_DMA_NONE, dev);
2965 if (data->ports[count])
2966 count++;
2967 }
2968
2969 data->num = count;
2970
2971 if (cards[i].postinit_hook)
2972 cards[i].postinit_hook (dev, count == 0);
2973
2974 if (count) {
2975 pci_set_drvdata(dev, data);
2976 return 0;
2977 }
2978
2979 kfree(data);
2980
2981 return -ENODEV;
2982}
2983
2984static void __devexit parport_pc_pci_remove(struct pci_dev *dev)
2985{
2986 struct pci_parport_data *data = pci_get_drvdata(dev);
2987 int i;
2988
2989 pci_set_drvdata(dev, NULL);
2990
2991 if (data) {
2992 for (i = data->num - 1; i >= 0; i--)
2993 parport_pc_unregister_port(data->ports[i]);
2994
2995 kfree(data);
2996 }
2997}
2998
2999static struct pci_driver parport_pc_pci_driver = {
3000 .name = "parport_pc",
3001 .id_table = parport_pc_pci_tbl,
3002 .probe = parport_pc_pci_probe,
3003 .remove = __devexit_p(parport_pc_pci_remove),
3004};
3005
3006static int __init parport_pc_init_superio (int autoirq, int autodma)
3007{
3008 const struct pci_device_id *id;
3009 struct pci_dev *pdev = NULL;
3010 int ret = 0;
3011
c9d8073f 3012 for_each_pci_dev(pdev) {
75865858 3013 id = pci_match_id(parport_pc_pci_tbl, pdev);
1da177e4
LT		 3014 if (id == NULL || id->driver_data >= last_sio)
3015 continue;
3016
3017 if (parport_pc_superio_info[id->driver_data].probe
3018 (pdev, autoirq, autodma,parport_pc_superio_info[id->driver_data].via)) {
3019 ret++;
3020 }
3021 }
3022
3023 return ret; /* number of devices found */
3024}
3025#else
3026static struct pci_driver parport_pc_pci_driver;
3027static int __init parport_pc_init_superio(int autoirq, int autodma) {return 0;}
3028#endif /* CONFIG_PCI */
3029
3030
3031static const struct pnp_device_id parport_pc_pnp_tbl[] = {
3032 /* Standard LPT Printer Port */
3033 {.id = "PNP0400", .driver_data = 0},
3034 /* ECP Printer Port */
3035 {.id = "PNP0401", .driver_data = 0},
3036 { }
3037};
3038
3039MODULE_DEVICE_TABLE(pnp,parport_pc_pnp_tbl);
3040
3041static int parport_pc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
3042{
3043 struct parport *pdata;
3044 unsigned long io_lo, io_hi;
3045 int dma, irq;
3046
3047 if (pnp_port_valid(dev,0) &&
3048 !(pnp_port_flags(dev,0) & IORESOURCE_DISABLED)) {
3049 io_lo = pnp_port_start(dev,0);
3050 } else
3051 return -EINVAL;
3052
3053 if (pnp_port_valid(dev,1) &&
3054 !(pnp_port_flags(dev,1) & IORESOURCE_DISABLED)) {
3055 io_hi = pnp_port_start(dev,1);
3056 } else
3057 io_hi = 0;
3058
3059 if (pnp_irq_valid(dev,0) &&
3060 !(pnp_irq_flags(dev,0) & IORESOURCE_DISABLED)) {
3061 irq = pnp_irq(dev,0);
3062 } else
3063 irq = PARPORT_IRQ_NONE;
3064
3065 if (pnp_dma_valid(dev,0) &&
3066 !(pnp_dma_flags(dev,0) & IORESOURCE_DISABLED)) {
3067 dma = pnp_dma(dev,0);
3068 } else
3069 dma = PARPORT_DMA_NONE;
3070
3071 printk(KERN_INFO "parport: PnPBIOS parport detected.\n");
3072 if (!(pdata = parport_pc_probe_port (io_lo, io_hi, irq, dma, NULL)))
3073 return -ENODEV;
3074
3075 pnp_set_drvdata(dev,pdata);
3076 return 0;
3077}
3078
3079static void parport_pc_pnp_remove(struct pnp_dev *dev)
3080{
3081 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3082 if (!pdata)
3083 return;
3084
3085 parport_pc_unregister_port(pdata);
3086}
3087
3088/* we only need the pnp layer to activate the device, at least for now */
3089static struct pnp_driver parport_pc_pnp_driver = {
3090 .name = "parport_pc",
3091 .id_table = parport_pc_pnp_tbl,
3092 .probe = parport_pc_pnp_probe,
3093 .remove = parport_pc_pnp_remove,
3094};
3095
3096
3097/* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3098static int __devinit __attribute__((unused))
3099parport_pc_find_isa_ports (int autoirq, int autodma)
3100{
3101 int count = 0;
3102
3103 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL))
3104 count++;
3105 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL))
3106 count++;
3107 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL))
3108 count++;
3109
3110 return count;
3111}
3112
3113/* This function is called by parport_pc_init if the user didn't
3114 * specify any ports to probe. Its job is to find some ports. Order
3115 * is important here -- we want ISA ports to be registered first,
3116 * followed by PCI cards (for least surprise), but before that we want
3117 * to do chipset-specific tests for some onboard ports that we know
3118 * about.
3119 *
3120 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3121 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3122 */
3123static int __init parport_pc_find_ports (int autoirq, int autodma)
3124{
3125 int count = 0, r;
3126
3127#ifdef CONFIG_PARPORT_PC_SUPERIO
3128 detect_and_report_winbond ();
3129 detect_and_report_smsc ();
3130#endif
3131
3132 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3133 count += parport_pc_init_superio (autoirq, autodma);
3134
3135 /* PnP ports, skip detection if SuperIO already found them */
3136 if (!count) {
3137 r = pnp_register_driver (&parport_pc_pnp_driver);
3138 if (r >= 0) {
3139 pnp_registered_parport = 1;
3140 count += r;
3141 }
3142 }
3143
3144 /* ISA ports and whatever (see asm/parport.h). */
3145 count += parport_pc_find_nonpci_ports (autoirq, autodma);
3146
3147 r = pci_register_driver (&parport_pc_pci_driver);
3148 if (r)
3149 return r;
3150 pci_registered_parport = 1;
3151 count += 1;
3152
3153 return count;
3154}
3155
3156/*
3157 * Piles of crap below pretend to be a parser for module and kernel
3158 * parameters. Say "thank you" to whoever had come up with that
3159 * syntax and keep in mind that code below is a cleaned up version.
3160 */
3161
3162static int __initdata io[PARPORT_PC_MAX_PORTS+1] = { [0 ... PARPORT_PC_MAX_PORTS] = 0 };
3163static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] =
3164 { [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO };
3165static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE };
3166static int __initdata irqval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY };
3167
3168static int __init parport_parse_param(const char *s, int *val,
3169 int automatic, int none, int nofifo)
3170{
3171 if (!s)
3172 return 0;
3173 if (!strncmp(s, "auto", 4))
3174 *val = automatic;
3175 else if (!strncmp(s, "none", 4))
3176 *val = none;
3177 else if (nofifo && !strncmp(s, "nofifo", 4))
3178 *val = nofifo;
3179 else {
3180 char *ep;
3181 unsigned long r = simple_strtoul(s, &ep, 0);
3182 if (ep != s)
3183 *val = r;
3184 else {
3185 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3186 return -1;
3187 }
3188 }
3189 return 0;
3190}
3191
3192static int __init parport_parse_irq(const char *irqstr, int *val)
3193{
3194 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3195 PARPORT_IRQ_NONE, 0);
3196}
3197
3198static int __init parport_parse_dma(const char *dmastr, int *val)
3199{
3200 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3201 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3202}
3203
3204#ifdef CONFIG_PCI
3205static int __init parport_init_mode_setup(char *str)
3206{
3207 printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3208
3209 if (!strcmp (str, "spp"))
3210 parport_init_mode=1;
3211 if (!strcmp (str, "ps2"))
3212 parport_init_mode=2;
3213 if (!strcmp (str, "epp"))
3214 parport_init_mode=3;
3215 if (!strcmp (str, "ecp"))
3216 parport_init_mode=4;
3217 if (!strcmp (str, "ecpepp"))
3218 parport_init_mode=5;
3219 return 1;
3220}
3221#endif
3222
3223#ifdef MODULE
3224static const char *irq[PARPORT_PC_MAX_PORTS];
3225static const char *dma[PARPORT_PC_MAX_PORTS];
3226
3227MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3228module_param_array(io, int, NULL, 0);
3229MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3230module_param_array(io_hi, int, NULL, 0);
3231MODULE_PARM_DESC(irq, "IRQ line");
3232module_param_array(irq, charp, NULL, 0);
3233MODULE_PARM_DESC(dma, "DMA channel");
3234module_param_array(dma, charp, NULL, 0);
3235#if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3236 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3237MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3238module_param(verbose_probing, int, 0644);
3239#endif
3240#ifdef CONFIG_PCI
3241static char *init_mode;
3242MODULE_PARM_DESC(init_mode, "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3243module_param(init_mode, charp, 0);
3244#endif
3245
3246static int __init parse_parport_params(void)
3247{
3248 unsigned int i;
3249 int val;
3250
3251#ifdef CONFIG_PCI
3252 if (init_mode)
3253 parport_init_mode_setup(init_mode);
3254#endif
3255
3256 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3257 if (parport_parse_irq(irq[i], &val))
3258 return 1;
3259 irqval[i] = val;
3260 if (parport_parse_dma(dma[i], &val))
3261 return 1;
3262 dmaval[i] = val;
3263 }
3264 if (!io[0]) {
3265 /* The user can make us use any IRQs or DMAs we find. */
3266 if (irq[0] && !parport_parse_irq(irq[0], &val))
3267 switch (val) {
3268 case PARPORT_IRQ_NONE:
3269 case PARPORT_IRQ_AUTO:
3270 irqval[0] = val;
3271 break;
3272 default:
3273 printk (KERN_WARNING
3274 "parport_pc: irq specified "
3275 "without base address. Use 'io=' "
3276 "to specify one\n");
3277 }
3278
3279 if (dma[0] && !parport_parse_dma(dma[0], &val))
3280 switch (val) {
3281 case PARPORT_DMA_NONE:
3282 case PARPORT_DMA_AUTO:
3283 dmaval[0] = val;
3284 break;
3285 default:
3286 printk (KERN_WARNING
3287 "parport_pc: dma specified "
3288 "without base address. Use 'io=' "
3289 "to specify one\n");
3290 }
3291 }
3292 return 0;
3293}
3294
3295#else
3296
3297static int parport_setup_ptr __initdata = 0;
3298
3299/*
3300 * Acceptable parameters:
3301 *
3302 * parport=0
3303 * parport=auto
3304 * parport=0xBASE[,IRQ[,DMA]]
3305 *
3306 * IRQ/DMA may be numeric or 'auto' or 'none'
3307 */
3308static int __init parport_setup (char *str)
3309{
3310 char *endptr;
3311 char *sep;
3312 int val;
3313
3314 if (!str || !*str || (*str == '0' && !*(str+1))) {
3315 /* Disable parport if "parport=0" in cmdline */
3316 io[0] = PARPORT_DISABLE;
3317 return 1;
3318 }
3319
3320 if (!strncmp (str, "auto", 4)) {
3321 irqval[0] = PARPORT_IRQ_AUTO;
3322 dmaval[0] = PARPORT_DMA_AUTO;
3323 return 1;
3324 }
3325
3326 val = simple_strtoul (str, &endptr, 0);
3327 if (endptr == str) {
3328 printk (KERN_WARNING "parport=%s not understood\n", str);
3329 return 1;
3330 }
3331
3332 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3333 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3334 return 1;
3335 }
3336
3337 io[parport_setup_ptr] = val;
3338 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3339 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3340
3341 sep = strchr(str, ',');
3342 if (sep++) {
3343 if (parport_parse_irq(sep, &val))
3344 return 1;
3345 irqval[parport_setup_ptr] = val;
3346 sep = strchr(sep, ',');
3347 if (sep++) {
3348 if (parport_parse_dma(sep, &val))
3349 return 1;
3350 dmaval[parport_setup_ptr] = val;
3351 }
3352 }
3353 parport_setup_ptr++;
3354 return 1;
3355}
3356
3357static int __init parse_parport_params(void)
3358{
3359 return io[0] == PARPORT_DISABLE;
3360}
3361
3362__setup ("parport=", parport_setup);
3363
3364/*
3365 * Acceptable parameters:
3366 *
3367 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3368 */
3369#ifdef CONFIG_PCI
3370__setup("parport_init_mode=",parport_init_mode_setup);
3371#endif
3372#endif
3373
3374/* "Parser" ends here */
3375
3376static int __init parport_pc_init(void)
3377{
3378 int count = 0;
3379
3380 if (parse_parport_params())
3381 return -EINVAL;
3382
3383 if (io[0]) {
3384 int i;
3385 /* Only probe the ports we were given. */
3386 user_specified = 1;
3387 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3388 if (!io[i])
3389 break;
3390 if ((io_hi[i]) == PARPORT_IOHI_AUTO)
3391 io_hi[i] = 0x400 + io[i];
3392 if (parport_pc_probe_port(io[i], io_hi[i],
3393 irqval[i], dmaval[i], NULL))
3394 count++;
3395 }
3396 } else
3397 count += parport_pc_find_ports (irqval[0], dmaval[0]);
3398
3399 return 0;
3400}
3401
3402static void __exit parport_pc_exit(void)
3403{
3404 if (pci_registered_parport)
3405 pci_unregister_driver (&parport_pc_pci_driver);
3406 if (pnp_registered_parport)
3407 pnp_unregister_driver (&parport_pc_pnp_driver);
3408
3409 spin_lock(&ports_lock);
3410 while (!list_empty(&ports_list)) {
3411 struct parport_pc_private *priv;
3412 struct parport *port;
3413 priv = list_entry(ports_list.next,
3414 struct parport_pc_private, list);
3415 port = priv->port;
3416 spin_unlock(&ports_lock);
3417 parport_pc_unregister_port(port);
3418 spin_lock(&ports_lock);
3419 }
3420 spin_unlock(&ports_lock);
3421}
3422
3423MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3424MODULE_DESCRIPTION("PC-style parallel port driver");
3425MODULE_LICENSE("GPL");
3426module_init(parport_pc_init)
3427module_exit(parport_pc_exit)
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