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epca.c: reformat comments and coding style improvements
[linux-2.6/openmoko-kernel.git] / drivers / parport / parport_pc.c
blobe2be84001105588a8939625fc3aecde88d7211d0
1 /* Low-level parallel-port routines for 8255-based PC-style hardware.
2 *
3 * Authors: Phil Blundell <philb@gnu.org>
4 * Tim Waugh <tim@cyberelk.demon.co.uk>
5 * Jose Renau <renau@acm.org>
6 * David Campbell
7 * Andrea Arcangeli
8 *
9 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
10 *
11 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
12 * DMA support - Bert De Jonghe <bert@sophis.be>
13 * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
14 * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
15 * Various hacks, Fred Barnes, 04/2001
16 * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
17 */
18
19 /* This driver should work with any hardware that is broadly compatible
20 * with that in the IBM PC. This applies to the majority of integrated
21 * I/O chipsets that are commonly available. The expected register
22 * layout is:
23 *
24 * base+0 data
25 * base+1 status
26 * base+2 control
27 *
28 * In addition, there are some optional registers:
29 *
30 * base+3 EPP address
31 * base+4 EPP data
32 * base+0x400 ECP config A
33 * base+0x401 ECP config B
34 * base+0x402 ECP control
35 *
36 * All registers are 8 bits wide and read/write. If your hardware differs
37 * only in register addresses (eg because your registers are on 32-bit
38 * word boundaries) then you can alter the constants in parport_pc.h to
39 * accommodate this.
40 *
41 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
42 * but rather will start at port->base_hi.
43 */
44
45 #include <linux/module.h>
46 #include <linux/init.h>
47 #include <linux/sched.h>
48 #include <linux/delay.h>
49 #include <linux/errno.h>
50 #include <linux/interrupt.h>
51 #include <linux/ioport.h>
52 #include <linux/kernel.h>
53 #include <linux/slab.h>
54 #include <linux/dma-mapping.h>
55 #include <linux/pci.h>
56 #include <linux/pnp.h>
57 #include <linux/platform_device.h>
58 #include <linux/sysctl.h>
59
60 #include <asm/io.h>
61 #include <asm/dma.h>
62 #include <asm/uaccess.h>
63
64 #include <linux/parport.h>
65 #include <linux/parport_pc.h>
66 #include <linux/via.h>
67 #include <asm/parport.h>
68
69 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
70
71 #ifdef CONFIG_ISA_DMA_API
72 #define HAS_DMA
73 #endif
74
75 /* ECR modes */
76 #define ECR_SPP 00
77 #define ECR_PS2 01
78 #define ECR_PPF 02
79 #define ECR_ECP 03
80 #define ECR_EPP 04
81 #define ECR_VND 05
82 #define ECR_TST 06
83 #define ECR_CNF 07
84 #define ECR_MODE_MASK 0xe0
85 #define ECR_WRITE(p,v) frob_econtrol((p),0xff,(v))
86
87 #undef DEBUG
88
89 #ifdef DEBUG
90 #define DPRINTK printk
91 #else
92 #define DPRINTK(stuff...)
93 #endif
94
95
96 #define NR_SUPERIOS 3
97 static struct superio_struct { /* For Super-IO chips autodetection */
98 int io;
99 int irq;
100 int dma;
101 } superios[NR_SUPERIOS] = { {0,},};
102
103 static int user_specified;
104 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
105 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
106 static int verbose_probing;
107 #endif
108 static int pci_registered_parport;
109 static int pnp_registered_parport;
110
111 /* frob_control, but for ECR */
112 static void frob_econtrol (struct parport *pb, unsigned char m,
113 unsigned char v)
114 {
115 unsigned char ectr = 0;
116
117 if (m != 0xff)
118 ectr = inb (ECONTROL (pb));
119
120 DPRINTK (KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n",
121 m, v, ectr, (ectr & ~m) ^ v);
122
123 outb ((ectr & ~m) ^ v, ECONTROL (pb));
124 }
125
126 static __inline__ void frob_set_mode (struct parport *p, int mode)
127 {
128 frob_econtrol (p, ECR_MODE_MASK, mode << 5);
129 }
130
131 #ifdef CONFIG_PARPORT_PC_FIFO
132 /* Safely change the mode bits in the ECR
133 Returns:
134 0 : Success
135 -EBUSY: Could not drain FIFO in some finite amount of time,
136 mode not changed!
137 */
138 static int change_mode(struct parport *p, int m)
139 {
140 const struct parport_pc_private *priv = p->physport->private_data;
141 unsigned char oecr;
142 int mode;
143
144 DPRINTK(KERN_INFO "parport change_mode ECP-ISA to mode 0x%02x\n",m);
145
146 if (!priv->ecr) {
147 printk (KERN_DEBUG "change_mode: but there's no ECR!\n");
148 return 0;
149 }
150
151 /* Bits <7:5> contain the mode. */
152 oecr = inb (ECONTROL (p));
153 mode = (oecr >> 5) & 0x7;
154 if (mode == m) return 0;
155
156 if (mode >= 2 && !(priv->ctr & 0x20)) {
157 /* This mode resets the FIFO, so we may
158 * have to wait for it to drain first. */
159 unsigned long expire = jiffies + p->physport->cad->timeout;
160 int counter;
161 switch (mode) {
162 case ECR_PPF: /* Parallel Port FIFO mode */
163 case ECR_ECP: /* ECP Parallel Port mode */
164 /* Busy wait for 200us */
165 for (counter = 0; counter < 40; counter++) {
166 if (inb (ECONTROL (p)) & 0x01)
167 break;
168 if (signal_pending (current)) break;
169 udelay (5);
170 }
171
172 /* Poll slowly. */
173 while (!(inb (ECONTROL (p)) & 0x01)) {
174 if (time_after_eq (jiffies, expire))
175 /* The FIFO is stuck. */
176 return -EBUSY;
177 schedule_timeout_interruptible(msecs_to_jiffies(10));
178 if (signal_pending (current))
179 break;
180 }
181 }
182 }
183
184 if (mode >= 2 && m >= 2) {
185 /* We have to go through mode 001 */
186 oecr &= ~(7 << 5);
187 oecr |= ECR_PS2 << 5;
188 ECR_WRITE (p, oecr);
189 }
190
191 /* Set the mode. */
192 oecr &= ~(7 << 5);
193 oecr |= m << 5;
194 ECR_WRITE (p, oecr);
195 return 0;
196 }
197
198 #ifdef CONFIG_PARPORT_1284
199 /* Find FIFO lossage; FIFO is reset */
200 #if 0
201 static int get_fifo_residue (struct parport *p)
202 {
203 int residue;
204 int cnfga;
205 const struct parport_pc_private *priv = p->physport->private_data;
206
207 /* Adjust for the contents of the FIFO. */
208 for (residue = priv->fifo_depth; ; residue--) {
209 if (inb (ECONTROL (p)) & 0x2)
210 /* Full up. */
211 break;
212
213 outb (0, FIFO (p));
214 }
215
216 printk (KERN_DEBUG "%s: %d PWords were left in FIFO\n", p->name,
217 residue);
218
219 /* Reset the FIFO. */
220 frob_set_mode (p, ECR_PS2);
221
222 /* Now change to config mode and clean up. FIXME */
223 frob_set_mode (p, ECR_CNF);
224 cnfga = inb (CONFIGA (p));
225 printk (KERN_DEBUG "%s: cnfgA contains 0x%02x\n", p->name, cnfga);
226
227 if (!(cnfga & (1<<2))) {
228 printk (KERN_DEBUG "%s: Accounting for extra byte\n", p->name);
229 residue++;
230 }
231
232 /* Don't care about partial PWords until support is added for
233 * PWord != 1 byte. */
234
235 /* Back to PS2 mode. */
236 frob_set_mode (p, ECR_PS2);
237
238 DPRINTK (KERN_DEBUG "*** get_fifo_residue: done residue collecting (ecr = 0x%2.2x)\n", inb (ECONTROL (p)));
239 return residue;
240 }
241 #endif /* 0 */
242 #endif /* IEEE 1284 support */
243 #endif /* FIFO support */
244
245 /*
246 * Clear TIMEOUT BIT in EPP MODE
247 *
248 * This is also used in SPP detection.
249 */
250 static int clear_epp_timeout(struct parport *pb)
251 {
252 unsigned char r;
253
254 if (!(parport_pc_read_status(pb) & 0x01))
255 return 1;
256
257 /* To clear timeout some chips require double read */
258 parport_pc_read_status(pb);
259 r = parport_pc_read_status(pb);
260 outb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */
261 outb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */
262 r = parport_pc_read_status(pb);
263
264 return !(r & 0x01);
265 }
266
267 /*
268 * Access functions.
269 *
270 * Most of these aren't static because they may be used by the
271 * parport_xxx_yyy macros. extern __inline__ versions of several
272 * of these are in parport_pc.h.
273 */
274
275 static irqreturn_t parport_pc_interrupt(int irq, void *dev_id)
276 {
277 parport_generic_irq(irq, (struct parport *) dev_id);
278 /* FIXME! Was it really ours? */
279 return IRQ_HANDLED;
280 }
281
282 static void parport_pc_init_state(struct pardevice *dev, struct parport_state *s)
283 {
284 s->u.pc.ctr = 0xc;
285 if (dev->irq_func &&
286 dev->port->irq != PARPORT_IRQ_NONE)
287 /* Set ackIntEn */
288 s->u.pc.ctr |= 0x10;
289
290 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
291 * D.Gruszka VScom */
292 }
293
294 static void parport_pc_save_state(struct parport *p, struct parport_state *s)
295 {
296 const struct parport_pc_private *priv = p->physport->private_data;
297 s->u.pc.ctr = priv->ctr;
298 if (priv->ecr)
299 s->u.pc.ecr = inb (ECONTROL (p));
300 }
301
302 static void parport_pc_restore_state(struct parport *p, struct parport_state *s)
303 {
304 struct parport_pc_private *priv = p->physport->private_data;
305 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
306 outb (c, CONTROL (p));
307 priv->ctr = c;
308 if (priv->ecr)
309 ECR_WRITE (p, s->u.pc.ecr);
310 }
311
312 #ifdef CONFIG_PARPORT_1284
313 static size_t parport_pc_epp_read_data (struct parport *port, void *buf,
314 size_t length, int flags)
315 {
316 size_t got = 0;
317
318 if (flags & PARPORT_W91284PIC) {
319 unsigned char status;
320 size_t left = length;
321
322 /* use knowledge about data lines..:
323 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
324 * pError is 1 if there are 16 bytes in the Warp's FIFO
325 */
326 status = inb (STATUS (port));
327
328 while (!(status & 0x08) && (got < length)) {
329 if ((left >= 16) && (status & 0x20) && !(status & 0x08)) {
330 /* can grab 16 bytes from warp fifo */
331 if (!((long)buf & 0x03)) {
332 insl (EPPDATA (port), buf, 4);
333 } else {
334 insb (EPPDATA (port), buf, 16);
335 }
336 buf += 16;
337 got += 16;
338 left -= 16;
339 } else {
340 /* grab single byte from the warp fifo */
341 *((char *)buf) = inb (EPPDATA (port));
342 buf++;
343 got++;
344 left--;
345 }
346 status = inb (STATUS (port));
347 if (status & 0x01) {
348 /* EPP timeout should never occur... */
349 printk (KERN_DEBUG "%s: EPP timeout occurred while talking to "
350 "w91284pic (should not have done)\n", port->name);
351 clear_epp_timeout (port);
352 }
353 }
354 return got;
355 }
356 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
357 if (!(((long)buf | length) & 0x03)) {
358 insl (EPPDATA (port), buf, (length >> 2));
359 } else {
360 insb (EPPDATA (port), buf, length);
361 }
362 if (inb (STATUS (port)) & 0x01) {
363 clear_epp_timeout (port);
364 return -EIO;
365 }
366 return length;
367 }
368 for (; got < length; got++) {
369 *((char*)buf) = inb (EPPDATA(port));
370 buf++;
371 if (inb (STATUS (port)) & 0x01) {
372 /* EPP timeout */
373 clear_epp_timeout (port);
374 break;
375 }
376 }
377
378 return got;
379 }
380
381 static size_t parport_pc_epp_write_data (struct parport *port, const void *buf,
382 size_t length, int flags)
383 {
384 size_t written = 0;
385
386 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
387 if (!(((long)buf | length) & 0x03)) {
388 outsl (EPPDATA (port), buf, (length >> 2));
389 } else {
390 outsb (EPPDATA (port), buf, length);
391 }
392 if (inb (STATUS (port)) & 0x01) {
393 clear_epp_timeout (port);
394 return -EIO;
395 }
396 return length;
397 }
398 for (; written < length; written++) {
399 outb (*((char*)buf), EPPDATA(port));
400 buf++;
401 if (inb (STATUS(port)) & 0x01) {
402 clear_epp_timeout (port);
403 break;
404 }
405 }
406
407 return written;
408 }
409
410 static size_t parport_pc_epp_read_addr (struct parport *port, void *buf,
411 size_t length, int flags)
412 {
413 size_t got = 0;
414
415 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
416 insb (EPPADDR (port), buf, length);
417 if (inb (STATUS (port)) & 0x01) {
418 clear_epp_timeout (port);
419 return -EIO;
420 }
421 return length;
422 }
423 for (; got < length; got++) {
424 *((char*)buf) = inb (EPPADDR (port));
425 buf++;
426 if (inb (STATUS (port)) & 0x01) {
427 clear_epp_timeout (port);
428 break;
429 }
430 }
431
432 return got;
433 }
434
435 static size_t parport_pc_epp_write_addr (struct parport *port,
436 const void *buf, size_t length,
437 int flags)
438 {
439 size_t written = 0;
440
441 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
442 outsb (EPPADDR (port), buf, length);
443 if (inb (STATUS (port)) & 0x01) {
444 clear_epp_timeout (port);
445 return -EIO;
446 }
447 return length;
448 }
449 for (; written < length; written++) {
450 outb (*((char*)buf), EPPADDR (port));
451 buf++;
452 if (inb (STATUS (port)) & 0x01) {
453 clear_epp_timeout (port);
454 break;
455 }
456 }
457
458 return written;
459 }
460
461 static size_t parport_pc_ecpepp_read_data (struct parport *port, void *buf,
462 size_t length, int flags)
463 {
464 size_t got;
465
466 frob_set_mode (port, ECR_EPP);
467 parport_pc_data_reverse (port);
468 parport_pc_write_control (port, 0x4);
469 got = parport_pc_epp_read_data (port, buf, length, flags);
470 frob_set_mode (port, ECR_PS2);
471
472 return got;
473 }
474
475 static size_t parport_pc_ecpepp_write_data (struct parport *port,
476 const void *buf, size_t length,
477 int flags)
478 {
479 size_t written;
480
481 frob_set_mode (port, ECR_EPP);
482 parport_pc_write_control (port, 0x4);
483 parport_pc_data_forward (port);
484 written = parport_pc_epp_write_data (port, buf, length, flags);
485 frob_set_mode (port, ECR_PS2);
486
487 return written;
488 }
489
490 static size_t parport_pc_ecpepp_read_addr (struct parport *port, void *buf,
491 size_t length, int flags)
492 {
493 size_t got;
494
495 frob_set_mode (port, ECR_EPP);
496 parport_pc_data_reverse (port);
497 parport_pc_write_control (port, 0x4);
498 got = parport_pc_epp_read_addr (port, buf, length, flags);
499 frob_set_mode (port, ECR_PS2);
500
501 return got;
502 }
503
504 static size_t parport_pc_ecpepp_write_addr (struct parport *port,
505 const void *buf, size_t length,
506 int flags)
507 {
508 size_t written;
509
510 frob_set_mode (port, ECR_EPP);
511 parport_pc_write_control (port, 0x4);
512 parport_pc_data_forward (port);
513 written = parport_pc_epp_write_addr (port, buf, length, flags);
514 frob_set_mode (port, ECR_PS2);
515
516 return written;
517 }
518 #endif /* IEEE 1284 support */
519
520 #ifdef CONFIG_PARPORT_PC_FIFO
521 static size_t parport_pc_fifo_write_block_pio (struct parport *port,
522 const void *buf, size_t length)
523 {
524 int ret = 0;
525 const unsigned char *bufp = buf;
526 size_t left = length;
527 unsigned long expire = jiffies + port->physport->cad->timeout;
528 const int fifo = FIFO (port);
529 int poll_for = 8; /* 80 usecs */
530 const struct parport_pc_private *priv = port->physport->private_data;
531 const int fifo_depth = priv->fifo_depth;
532
533 port = port->physport;
534
535 /* We don't want to be interrupted every character. */
536 parport_pc_disable_irq (port);
537 /* set nErrIntrEn and serviceIntr */
538 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
539
540 /* Forward mode. */
541 parport_pc_data_forward (port); /* Must be in PS2 mode */
542
543 while (left) {
544 unsigned char byte;
545 unsigned char ecrval = inb (ECONTROL (port));
546 int i = 0;
547
548 if (need_resched() && time_before (jiffies, expire))
549 /* Can't yield the port. */
550 schedule ();
551
552 /* Anyone else waiting for the port? */
553 if (port->waithead) {
554 printk (KERN_DEBUG "Somebody wants the port\n");
555 break;
556 }
557
558 if (ecrval & 0x02) {
559 /* FIFO is full. Wait for interrupt. */
560
561 /* Clear serviceIntr */
562 ECR_WRITE (port, ecrval & ~(1<<2));
563 false_alarm:
564 ret = parport_wait_event (port, HZ);
565 if (ret < 0) break;
566 ret = 0;
567 if (!time_before (jiffies, expire)) {
568 /* Timed out. */
569 printk (KERN_DEBUG "FIFO write timed out\n");
570 break;
571 }
572 ecrval = inb (ECONTROL (port));
573 if (!(ecrval & (1<<2))) {
574 if (need_resched() &&
575 time_before (jiffies, expire))
576 schedule ();
577
578 goto false_alarm;
579 }
580
581 continue;
582 }
583
584 /* Can't fail now. */
585 expire = jiffies + port->cad->timeout;
586
587 poll:
588 if (signal_pending (current))
589 break;
590
591 if (ecrval & 0x01) {
592 /* FIFO is empty. Blast it full. */
593 const int n = left < fifo_depth ? left : fifo_depth;
594 outsb (fifo, bufp, n);
595 bufp += n;
596 left -= n;
597
598 /* Adjust the poll time. */
599 if (i < (poll_for - 2)) poll_for--;
600 continue;
601 } else if (i++ < poll_for) {
602 udelay (10);
603 ecrval = inb (ECONTROL (port));
604 goto poll;
605 }
606
607 /* Half-full (call me an optimist) */
608 byte = *bufp++;
609 outb (byte, fifo);
610 left--;
611 }
612
613 dump_parport_state ("leave fifo_write_block_pio", port);
614 return length - left;
615 }
616
617 #ifdef HAS_DMA
618 static size_t parport_pc_fifo_write_block_dma (struct parport *port,
619 const void *buf, size_t length)
620 {
621 int ret = 0;
622 unsigned long dmaflag;
623 size_t left = length;
624 const struct parport_pc_private *priv = port->physport->private_data;
625 struct device *dev = port->physport->dev;
626 dma_addr_t dma_addr, dma_handle;
627 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
628 unsigned long start = (unsigned long) buf;
629 unsigned long end = (unsigned long) buf + length - 1;
630
631 dump_parport_state ("enter fifo_write_block_dma", port);
632 if (end < MAX_DMA_ADDRESS) {
633 /* If it would cross a 64k boundary, cap it at the end. */
634 if ((start ^ end) & ~0xffffUL)
635 maxlen = 0x10000 - (start & 0xffff);
636
637 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
638 DMA_TO_DEVICE);
639 } else {
640 /* above 16 MB we use a bounce buffer as ISA-DMA is not possible */
641 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
642 dma_addr = priv->dma_handle;
643 dma_handle = 0;
644 }
645
646 port = port->physport;
647
648 /* We don't want to be interrupted every character. */
649 parport_pc_disable_irq (port);
650 /* set nErrIntrEn and serviceIntr */
651 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
652
653 /* Forward mode. */
654 parport_pc_data_forward (port); /* Must be in PS2 mode */
655
656 while (left) {
657 unsigned long expire = jiffies + port->physport->cad->timeout;
658
659 size_t count = left;
660
661 if (count > maxlen)
662 count = maxlen;
663
664 if (!dma_handle) /* bounce buffer ! */
665 memcpy(priv->dma_buf, buf, count);
666
667 dmaflag = claim_dma_lock();
668 disable_dma(port->dma);
669 clear_dma_ff(port->dma);
670 set_dma_mode(port->dma, DMA_MODE_WRITE);
671 set_dma_addr(port->dma, dma_addr);
672 set_dma_count(port->dma, count);
673
674 /* Set DMA mode */
675 frob_econtrol (port, 1<<3, 1<<3);
676
677 /* Clear serviceIntr */
678 frob_econtrol (port, 1<<2, 0);
679
680 enable_dma(port->dma);
681 release_dma_lock(dmaflag);
682
683 /* assume DMA will be successful */
684 left -= count;
685 buf += count;
686 if (dma_handle) dma_addr += count;
687
688 /* Wait for interrupt. */
689 false_alarm:
690 ret = parport_wait_event (port, HZ);
691 if (ret < 0) break;
692 ret = 0;
693 if (!time_before (jiffies, expire)) {
694 /* Timed out. */
695 printk (KERN_DEBUG "DMA write timed out\n");
696 break;
697 }
698 /* Is serviceIntr set? */
699 if (!(inb (ECONTROL (port)) & (1<<2))) {
700 cond_resched();
701
702 goto false_alarm;
703 }
704
705 dmaflag = claim_dma_lock();
706 disable_dma(port->dma);
707 clear_dma_ff(port->dma);
708 count = get_dma_residue(port->dma);
709 release_dma_lock(dmaflag);
710
711 cond_resched(); /* Can't yield the port. */
712
713 /* Anyone else waiting for the port? */
714 if (port->waithead) {
715 printk (KERN_DEBUG "Somebody wants the port\n");
716 break;
717 }
718
719 /* update for possible DMA residue ! */
720 buf -= count;
721 left += count;
722 if (dma_handle) dma_addr -= count;
723 }
724
725 /* Maybe got here through break, so adjust for DMA residue! */
726 dmaflag = claim_dma_lock();
727 disable_dma(port->dma);
728 clear_dma_ff(port->dma);
729 left += get_dma_residue(port->dma);
730 release_dma_lock(dmaflag);
731
732 /* Turn off DMA mode */
733 frob_econtrol (port, 1<<3, 0);
734
735 if (dma_handle)
736 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
737
738 dump_parport_state ("leave fifo_write_block_dma", port);
739 return length - left;
740 }
741 #endif
742
743 static inline size_t parport_pc_fifo_write_block(struct parport *port,
744 const void *buf, size_t length)
745 {
746 #ifdef HAS_DMA
747 if (port->dma != PARPORT_DMA_NONE)
748 return parport_pc_fifo_write_block_dma (port, buf, length);
749 #endif
750 return parport_pc_fifo_write_block_pio (port, buf, length);
751 }
752
753 /* Parallel Port FIFO mode (ECP chipsets) */
754 static size_t parport_pc_compat_write_block_pio (struct parport *port,
755 const void *buf, size_t length,
756 int flags)
757 {
758 size_t written;
759 int r;
760 unsigned long expire;
761 const struct parport_pc_private *priv = port->physport->private_data;
762
763 /* Special case: a timeout of zero means we cannot call schedule().
764 * Also if O_NONBLOCK is set then use the default implementation. */
765 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
766 return parport_ieee1284_write_compat (port, buf,
767 length, flags);
768
769 /* Set up parallel port FIFO mode.*/
770 parport_pc_data_forward (port); /* Must be in PS2 mode */
771 parport_pc_frob_control (port, PARPORT_CONTROL_STROBE, 0);
772 r = change_mode (port, ECR_PPF); /* Parallel port FIFO */
773 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n", port->name);
774
775 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
776
777 /* Write the data to the FIFO. */
778 written = parport_pc_fifo_write_block(port, buf, length);
779
780 /* Finish up. */
781 /* For some hardware we don't want to touch the mode until
782 * the FIFO is empty, so allow 4 seconds for each position
783 * in the fifo.
784 */
785 expire = jiffies + (priv->fifo_depth * HZ * 4);
786 do {
787 /* Wait for the FIFO to empty */
788 r = change_mode (port, ECR_PS2);
789 if (r != -EBUSY) {
790 break;
791 }
792 } while (time_before (jiffies, expire));
793 if (r == -EBUSY) {
794
795 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
796
797 /* Prevent further data transfer. */
798 frob_set_mode (port, ECR_TST);
799
800 /* Adjust for the contents of the FIFO. */
801 for (written -= priv->fifo_depth; ; written++) {
802 if (inb (ECONTROL (port)) & 0x2) {
803 /* Full up. */
804 break;
805 }
806 outb (0, FIFO (port));
807 }
808
809 /* Reset the FIFO and return to PS2 mode. */
810 frob_set_mode (port, ECR_PS2);
811 }
812
813 r = parport_wait_peripheral (port,
814 PARPORT_STATUS_BUSY,
815 PARPORT_STATUS_BUSY);
816 if (r)
817 printk (KERN_DEBUG
818 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
819 port->name, r);
820
821 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
822
823 return written;
824 }
825
826 /* ECP */
827 #ifdef CONFIG_PARPORT_1284
828 static size_t parport_pc_ecp_write_block_pio (struct parport *port,
829 const void *buf, size_t length,
830 int flags)
831 {
832 size_t written;
833 int r;
834 unsigned long expire;
835 const struct parport_pc_private *priv = port->physport->private_data;
836
837 /* Special case: a timeout of zero means we cannot call schedule().
838 * Also if O_NONBLOCK is set then use the default implementation. */
839 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
840 return parport_ieee1284_ecp_write_data (port, buf,
841 length, flags);
842
843 /* Switch to forward mode if necessary. */
844 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
845 /* Event 47: Set nInit high. */
846 parport_frob_control (port,
847 PARPORT_CONTROL_INIT
848 | PARPORT_CONTROL_AUTOFD,
849 PARPORT_CONTROL_INIT
850 | PARPORT_CONTROL_AUTOFD);
851
852 /* Event 49: PError goes high. */
853 r = parport_wait_peripheral (port,
854 PARPORT_STATUS_PAPEROUT,
855 PARPORT_STATUS_PAPEROUT);
856 if (r) {
857 printk (KERN_DEBUG "%s: PError timeout (%d) "
858 "in ecp_write_block_pio\n", port->name, r);
859 }
860 }
861
862 /* Set up ECP parallel port mode.*/
863 parport_pc_data_forward (port); /* Must be in PS2 mode */
864 parport_pc_frob_control (port,
865 PARPORT_CONTROL_STROBE |
866 PARPORT_CONTROL_AUTOFD,
867 0);
868 r = change_mode (port, ECR_ECP); /* ECP FIFO */
869 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
870 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
871
872 /* Write the data to the FIFO. */
873 written = parport_pc_fifo_write_block(port, buf, length);
874
875 /* Finish up. */
876 /* For some hardware we don't want to touch the mode until
877 * the FIFO is empty, so allow 4 seconds for each position
878 * in the fifo.
879 */
880 expire = jiffies + (priv->fifo_depth * (HZ * 4));
881 do {
882 /* Wait for the FIFO to empty */
883 r = change_mode (port, ECR_PS2);
884 if (r != -EBUSY) {
885 break;
886 }
887 } while (time_before (jiffies, expire));
888 if (r == -EBUSY) {
889
890 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
891
892 /* Prevent further data transfer. */
893 frob_set_mode (port, ECR_TST);
894
895 /* Adjust for the contents of the FIFO. */
896 for (written -= priv->fifo_depth; ; written++) {
897 if (inb (ECONTROL (port)) & 0x2) {
898 /* Full up. */
899 break;
900 }
901 outb (0, FIFO (port));
902 }
903
904 /* Reset the FIFO and return to PS2 mode. */
905 frob_set_mode (port, ECR_PS2);
906
907 /* Host transfer recovery. */
908 parport_pc_data_reverse (port); /* Must be in PS2 mode */
909 udelay (5);
910 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
911 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
912 if (r)
913 printk (KERN_DEBUG "%s: PE,1 timeout (%d) "
914 "in ecp_write_block_pio\n", port->name, r);
915
916 parport_frob_control (port,
917 PARPORT_CONTROL_INIT,
918 PARPORT_CONTROL_INIT);
919 r = parport_wait_peripheral (port,
920 PARPORT_STATUS_PAPEROUT,
921 PARPORT_STATUS_PAPEROUT);
922 if (r)
923 printk (KERN_DEBUG "%s: PE,2 timeout (%d) "
924 "in ecp_write_block_pio\n", port->name, r);
925 }
926
927 r = parport_wait_peripheral (port,
928 PARPORT_STATUS_BUSY,
929 PARPORT_STATUS_BUSY);
930 if(r)
931 printk (KERN_DEBUG
932 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
933 port->name, r);
934
935 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
936
937 return written;
938 }
939
940 #if 0
941 static size_t parport_pc_ecp_read_block_pio (struct parport *port,
942 void *buf, size_t length,
943 int flags)
944 {
945 size_t left = length;
946 size_t fifofull;
947 int r;
948 const int fifo = FIFO(port);
949 const struct parport_pc_private *priv = port->physport->private_data;
950 const int fifo_depth = priv->fifo_depth;
951 char *bufp = buf;
952
953 port = port->physport;
954 DPRINTK (KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n");
955 dump_parport_state ("enter fcn", port);
956
957 /* Special case: a timeout of zero means we cannot call schedule().
958 * Also if O_NONBLOCK is set then use the default implementation. */
959 if (port->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
960 return parport_ieee1284_ecp_read_data (port, buf,
961 length, flags);
962
963 if (port->ieee1284.mode == IEEE1284_MODE_ECPRLE) {
964 /* If the peripheral is allowed to send RLE compressed
965 * data, it is possible for a byte to expand to 128
966 * bytes in the FIFO. */
967 fifofull = 128;
968 } else {
969 fifofull = fifo_depth;
970 }
971
972 /* If the caller wants less than a full FIFO's worth of data,
973 * go through software emulation. Otherwise we may have to throw
974 * away data. */
975 if (length < fifofull)
976 return parport_ieee1284_ecp_read_data (port, buf,
977 length, flags);
978
979 if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE) {
980 /* change to reverse-idle phase (must be in forward-idle) */
981
982 /* Event 38: Set nAutoFd low (also make sure nStrobe is high) */
983 parport_frob_control (port,
984 PARPORT_CONTROL_AUTOFD
985 | PARPORT_CONTROL_STROBE,
986 PARPORT_CONTROL_AUTOFD);
987 parport_pc_data_reverse (port); /* Must be in PS2 mode */
988 udelay (5);
989 /* Event 39: Set nInit low to initiate bus reversal */
990 parport_frob_control (port,
991 PARPORT_CONTROL_INIT,
992 0);
993 /* Event 40: Wait for nAckReverse (PError) to go low */
994 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
995 if (r) {
996 printk (KERN_DEBUG "%s: PE timeout Event 40 (%d) "
997 "in ecp_read_block_pio\n", port->name, r);
998 return 0;
999 }
1000 }
1001
1002 /* Set up ECP FIFO mode.*/
1003 /* parport_pc_frob_control (port,
1004 PARPORT_CONTROL_STROBE |
1005 PARPORT_CONTROL_AUTOFD,
1006 PARPORT_CONTROL_AUTOFD); */
1007 r = change_mode (port, ECR_ECP); /* ECP FIFO */
1008 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
1009
1010 port->ieee1284.phase = IEEE1284_PH_REV_DATA;
1011
1012 /* the first byte must be collected manually */
1013 dump_parport_state ("pre 43", port);
1014 /* Event 43: Wait for nAck to go low */
1015 r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0);
1016 if (r) {
1017 /* timed out while reading -- no data */
1018 printk (KERN_DEBUG "PIO read timed out (initial byte)\n");
1019 goto out_no_data;
1020 }
1021 /* read byte */
1022 *bufp++ = inb (DATA (port));
1023 left--;
1024 dump_parport_state ("43-44", port);
1025 /* Event 44: nAutoFd (HostAck) goes high to acknowledge */
1026 parport_pc_frob_control (port,
1027 PARPORT_CONTROL_AUTOFD,
1028 0);
1029 dump_parport_state ("pre 45", port);
1030 /* Event 45: Wait for nAck to go high */
1031 /* r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, PARPORT_STATUS_ACK); */
1032 dump_parport_state ("post 45", port);
1033 r = 0;
1034 if (r) {
1035 /* timed out while waiting for peripheral to respond to ack */
1036 printk (KERN_DEBUG "ECP PIO read timed out (waiting for nAck)\n");
1037
1038 /* keep hold of the byte we've got already */
1039 goto out_no_data;
1040 }
1041 /* Event 46: nAutoFd (HostAck) goes low to accept more data */
1042 parport_pc_frob_control (port,
1043 PARPORT_CONTROL_AUTOFD,
1044 PARPORT_CONTROL_AUTOFD);
1045
1046
1047 dump_parport_state ("rev idle", port);
1048 /* Do the transfer. */
1049 while (left > fifofull) {
1050 int ret;
1051 unsigned long expire = jiffies + port->cad->timeout;
1052 unsigned char ecrval = inb (ECONTROL (port));
1053
1054 if (need_resched() && time_before (jiffies, expire))
1055 /* Can't yield the port. */
1056 schedule ();
1057
1058 /* At this point, the FIFO may already be full. In
1059 * that case ECP is already holding back the
1060 * peripheral (assuming proper design) with a delayed
1061 * handshake. Work fast to avoid a peripheral
1062 * timeout. */
1063
1064 if (ecrval & 0x01) {
1065 /* FIFO is empty. Wait for interrupt. */
1066 dump_parport_state ("FIFO empty", port);
1067
1068 /* Anyone else waiting for the port? */
1069 if (port->waithead) {
1070 printk (KERN_DEBUG "Somebody wants the port\n");
1071 break;
1072 }
1073
1074 /* Clear serviceIntr */
1075 ECR_WRITE (port, ecrval & ~(1<<2));
1076 false_alarm:
1077 dump_parport_state ("waiting", port);
1078 ret = parport_wait_event (port, HZ);
1079 DPRINTK (KERN_DEBUG "parport_wait_event returned %d\n", ret);
1080 if (ret < 0)
1081 break;
1082 ret = 0;
1083 if (!time_before (jiffies, expire)) {
1084 /* Timed out. */
1085 dump_parport_state ("timeout", port);
1086 printk (KERN_DEBUG "PIO read timed out\n");
1087 break;
1088 }
1089 ecrval = inb (ECONTROL (port));
1090 if (!(ecrval & (1<<2))) {
1091 if (need_resched() &&
1092 time_before (jiffies, expire)) {
1093 schedule ();
1094 }
1095 goto false_alarm;
1096 }
1097
1098 /* Depending on how the FIFO threshold was
1099 * set, how long interrupt service took, and
1100 * how fast the peripheral is, we might be
1101 * lucky and have a just filled FIFO. */
1102 continue;
1103 }
1104
1105 if (ecrval & 0x02) {
1106 /* FIFO is full. */
1107 dump_parport_state ("FIFO full", port);
1108 insb (fifo, bufp, fifo_depth);
1109 bufp += fifo_depth;
1110 left -= fifo_depth;
1111 continue;
1112 }
1113
1114 DPRINTK (KERN_DEBUG "*** ecp_read_block_pio: reading one byte from the FIFO\n");
1115
1116 /* FIFO not filled. We will cycle this loop for a while
1117 * and either the peripheral will fill it faster,
1118 * tripping a fast empty with insb, or we empty it. */
1119 *bufp++ = inb (fifo);
1120 left--;
1121 }
1122
1123 /* scoop up anything left in the FIFO */
1124 while (left && !(inb (ECONTROL (port) & 0x01))) {
1125 *bufp++ = inb (fifo);
1126 left--;
1127 }
1128
1129 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
1130 dump_parport_state ("rev idle2", port);
1131
1132 out_no_data:
1133
1134 /* Go to forward idle mode to shut the peripheral up (event 47). */
1135 parport_frob_control (port, PARPORT_CONTROL_INIT, PARPORT_CONTROL_INIT);
1136
1137 /* event 49: PError goes high */
1138 r = parport_wait_peripheral (port,
1139 PARPORT_STATUS_PAPEROUT,
1140 PARPORT_STATUS_PAPEROUT);
1141 if (r) {
1142 printk (KERN_DEBUG
1143 "%s: PE timeout FWDIDLE (%d) in ecp_read_block_pio\n",
1144 port->name, r);
1145 }
1146
1147 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
1148
1149 /* Finish up. */
1150 {
1151 int lost = get_fifo_residue (port);
1152 if (lost)
1153 /* Shouldn't happen with compliant peripherals. */
1154 printk (KERN_DEBUG "%s: DATA LOSS (%d bytes)!\n",
1155 port->name, lost);
1156 }
1157
1158 dump_parport_state ("fwd idle", port);
1159 return length - left;
1160 }
1161 #endif /* 0 */
1162 #endif /* IEEE 1284 support */
1163 #endif /* Allowed to use FIFO/DMA */
1164
1165
1166 /*
1167 * ******************************************
1168 * INITIALISATION AND MODULE STUFF BELOW HERE
1169 * ******************************************
1170 */
1171
1172 /* GCC is not inlining extern inline function later overwriten to non-inline,
1173 so we use outlined_ variants here. */
1174 static const struct parport_operations parport_pc_ops =
1175 {
1176 .write_data = parport_pc_write_data,
1177 .read_data = parport_pc_read_data,
1178
1179 .write_control = parport_pc_write_control,
1180 .read_control = parport_pc_read_control,
1181 .frob_control = parport_pc_frob_control,
1182
1183 .read_status = parport_pc_read_status,
1184
1185 .enable_irq = parport_pc_enable_irq,
1186 .disable_irq = parport_pc_disable_irq,
1187
1188 .data_forward = parport_pc_data_forward,
1189 .data_reverse = parport_pc_data_reverse,
1190
1191 .init_state = parport_pc_init_state,
1192 .save_state = parport_pc_save_state,
1193 .restore_state = parport_pc_restore_state,
1194
1195 .epp_write_data = parport_ieee1284_epp_write_data,
1196 .epp_read_data = parport_ieee1284_epp_read_data,
1197 .epp_write_addr = parport_ieee1284_epp_write_addr,
1198 .epp_read_addr = parport_ieee1284_epp_read_addr,
1199
1200 .ecp_write_data = parport_ieee1284_ecp_write_data,
1201 .ecp_read_data = parport_ieee1284_ecp_read_data,
1202 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
1203
1204 .compat_write_data = parport_ieee1284_write_compat,
1205 .nibble_read_data = parport_ieee1284_read_nibble,
1206 .byte_read_data = parport_ieee1284_read_byte,
1207
1208 .owner = THIS_MODULE,
1209 };
1210
1211 #ifdef CONFIG_PARPORT_PC_SUPERIO
1212 /* Super-IO chipset detection, Winbond, SMSC */
1213 static void __devinit show_parconfig_smsc37c669(int io, int key)
1214 {
1215 int cr1,cr4,cra,cr23,cr26,cr27,i=0;
1216 static const char *const modes[]={
1217 "SPP and Bidirectional (PS/2)",
1218 "EPP and SPP",
1219 "ECP",
1220 "ECP and EPP" };
1221
1222 outb(key,io);
1223 outb(key,io);
1224 outb(1,io);
1225 cr1=inb(io+1);
1226 outb(4,io);
1227 cr4=inb(io+1);
1228 outb(0x0a,io);
1229 cra=inb(io+1);
1230 outb(0x23,io);
1231 cr23=inb(io+1);
1232 outb(0x26,io);
1233 cr26=inb(io+1);
1234 outb(0x27,io);
1235 cr27=inb(io+1);
1236 outb(0xaa,io);
1237
1238 if (verbose_probing) {
1239 printk (KERN_INFO "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
1240 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
1241 cr1,cr4,cra,cr23,cr26,cr27);
1242
1243 /* The documentation calls DMA and IRQ-Lines by letters, so
1244 the board maker can/will wire them
1245 appropriately/randomly... G=reserved H=IDE-irq, */
1246 printk (KERN_INFO "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, "
1247 "fifo threshold=%d\n", cr23*4,
1248 (cr27 &0x0f) ? 'A'-1+(cr27 &0x0f): '-',
1249 (cr26 &0x0f) ? 'A'-1+(cr26 &0x0f): '-', cra & 0x0f);
1250 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
1251 (cr23*4 >=0x100) ?"yes":"no", (cr1 & 4) ? "yes" : "no");
1252 printk(KERN_INFO "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1253 (cr1 & 0x08 ) ? "Standard mode only (SPP)" : modes[cr4 & 0x03],
1254 (cr4 & 0x40) ? "1.7" : "1.9");
1255 }
1256
1257 /* Heuristics ! BIOS setup for this mainboard device limits
1258 the choices to standard settings, i.e. io-address and IRQ
1259 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1260 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1261 if(cr23*4 >=0x100) { /* if active */
1262 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1263 i++;
1264 if(i==NR_SUPERIOS)
1265 printk(KERN_INFO "Super-IO: too many chips!\n");
1266 else {
1267 int d;
1268 switch (cr23*4) {
1269 case 0x3bc:
1270 superios[i].io = 0x3bc;
1271 superios[i].irq = 7;
1272 break;
1273 case 0x378:
1274 superios[i].io = 0x378;
1275 superios[i].irq = 7;
1276 break;
1277 case 0x278:
1278 superios[i].io = 0x278;
1279 superios[i].irq = 5;
1280 }
1281 d=(cr26 &0x0f);
1282 if((d==1) || (d==3))
1283 superios[i].dma= d;
1284 else
1285 superios[i].dma= PARPORT_DMA_NONE;
1286 }
1287 }
1288 }
1289
1290
1291 static void __devinit show_parconfig_winbond(int io, int key)
1292 {
1293 int cr30,cr60,cr61,cr70,cr74,crf0,i=0;
1294 static const char *const modes[] = {
1295 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1296 "EPP-1.9 and SPP",
1297 "ECP",
1298 "ECP and EPP-1.9",
1299 "Standard (SPP)",
1300 "EPP-1.7 and SPP", /* 5 */
1301 "undefined!",
1302 "ECP and EPP-1.7" };
1303 static char *const irqtypes[] = {
1304 "pulsed low, high-Z",
1305 "follows nACK" };
1306
1307 /* The registers are called compatible-PnP because the
1308 register layout is modelled after ISA-PnP, the access
1309 method is just another ... */
1310 outb(key,io);
1311 outb(key,io);
1312 outb(0x07,io); /* Register 7: Select Logical Device */
1313 outb(0x01,io+1); /* LD1 is Parallel Port */
1314 outb(0x30,io);
1315 cr30=inb(io+1);
1316 outb(0x60,io);
1317 cr60=inb(io+1);
1318 outb(0x61,io);
1319 cr61=inb(io+1);
1320 outb(0x70,io);
1321 cr70=inb(io+1);
1322 outb(0x74,io);
1323 cr74=inb(io+1);
1324 outb(0xf0,io);
1325 crf0=inb(io+1);
1326 outb(0xaa,io);
1327
1328 if (verbose_probing) {
1329 printk(KERN_INFO "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x "
1330 "70=%02x 74=%02x, f0=%02x\n", cr30,cr60,cr61,cr70,cr74,crf0);
1331 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1332 (cr30 & 0x01) ? "yes":"no", cr60,cr61,cr70&0x0f );
1333 if ((cr74 & 0x07) > 3)
1334 printk("dma=none\n");
1335 else
1336 printk("dma=%d\n",cr74 & 0x07);
1337 printk(KERN_INFO "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1338 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1339 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n", modes[crf0 & 0x07]);
1340 }
1341
1342 if(cr30 & 0x01) { /* the settings can be interrogated later ... */
1343 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1344 i++;
1345 if(i==NR_SUPERIOS)
1346 printk(KERN_INFO "Super-IO: too many chips!\n");
1347 else {
1348 superios[i].io = (cr60<<8)|cr61;
1349 superios[i].irq = cr70&0x0f;
1350 superios[i].dma = (((cr74 & 0x07) > 3) ?
1351 PARPORT_DMA_NONE : (cr74 & 0x07));
1352 }
1353 }
1354 }
1355
1356 static void __devinit decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1357 {
1358 const char *type = "unknown";
1359 int id,progif=2;
1360
1361 if (devid == devrev)
1362 /* simple heuristics, we happened to read some
1363 non-winbond register */
1364 return;
1365
1366 id=(devid<<8) | devrev;
1367
1368 /* Values are from public data sheets pdf files, I can just
1369 confirm 83977TF is correct :-) */
1370 if (id == 0x9771) type="83977F/AF";
1371 else if (id == 0x9773) type="83977TF / SMSC 97w33x/97w34x";
1372 else if (id == 0x9774) type="83977ATF";
1373 else if ((id & ~0x0f) == 0x5270) type="83977CTF / SMSC 97w36x";
1374 else if ((id & ~0x0f) == 0x52f0) type="83977EF / SMSC 97w35x";
1375 else if ((id & ~0x0f) == 0x5210) type="83627";
1376 else if ((id & ~0x0f) == 0x6010) type="83697HF";
1377 else if ((oldid &0x0f ) == 0x0a) { type="83877F"; progif=1;}
1378 else if ((oldid &0x0f ) == 0x0b) { type="83877AF"; progif=1;}
1379 else if ((oldid &0x0f ) == 0x0c) { type="83877TF"; progif=1;}
1380 else if ((oldid &0x0f ) == 0x0d) { type="83877ATF"; progif=1;}
1381 else progif=0;
1382
1383 if (verbose_probing)
1384 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1385 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1386 efer, key, devid, devrev, oldid, type);
1387
1388 if (progif == 2)
1389 show_parconfig_winbond(efer,key);
1390 }
1391
1392 static void __devinit decode_smsc(int efer, int key, int devid, int devrev)
1393 {
1394 const char *type = "unknown";
1395 void (*func)(int io, int key);
1396 int id;
1397
1398 if (devid == devrev)
1399 /* simple heuristics, we happened to read some
1400 non-smsc register */
1401 return;
1402
1403 func=NULL;
1404 id=(devid<<8) | devrev;
1405
1406 if (id==0x0302) {type="37c669"; func=show_parconfig_smsc37c669;}
1407 else if (id==0x6582) type="37c665IR";
1408 else if (devid==0x65) type="37c665GT";
1409 else if (devid==0x66) type="37c666GT";
1410
1411 if (verbose_probing)
1412 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1413 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1414 efer, key, devid, devrev, type);
1415
1416 if (func)
1417 func(efer,key);
1418 }
1419
1420
1421 static void __devinit winbond_check(int io, int key)
1422 {
1423 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1424
1425 if (!request_region(io, 3, __FUNCTION__))
1426 return;
1427
1428 /* First probe without key */
1429 outb(0x20,io);
1430 x_devid=inb(io+1);
1431 outb(0x21,io);
1432 x_devrev=inb(io+1);
1433 outb(0x09,io);
1434 x_oldid=inb(io+1);
1435
1436 outb(key,io);
1437 outb(key,io); /* Write Magic Sequence to EFER, extended
1438 funtion enable register */
1439 outb(0x20,io); /* Write EFIR, extended function index register */
1440 devid=inb(io+1); /* Read EFDR, extended function data register */
1441 outb(0x21,io);
1442 devrev=inb(io+1);
1443 outb(0x09,io);
1444 oldid=inb(io+1);
1445 outb(0xaa,io); /* Magic Seal */
1446
1447 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1448 goto out; /* protection against false positives */
1449
1450 decode_winbond(io,key,devid,devrev,oldid);
1451 out:
1452 release_region(io, 3);
1453 }
1454
1455 static void __devinit winbond_check2(int io,int key)
1456 {
1457 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1458
1459 if (!request_region(io, 3, __FUNCTION__))
1460 return;
1461
1462 /* First probe without the key */
1463 outb(0x20,io+2);
1464 x_devid=inb(io+2);
1465 outb(0x21,io+1);
1466 x_devrev=inb(io+2);
1467 outb(0x09,io+1);
1468 x_oldid=inb(io+2);
1469
1470 outb(key,io); /* Write Magic Byte to EFER, extended
1471 funtion enable register */
1472 outb(0x20,io+2); /* Write EFIR, extended function index register */
1473 devid=inb(io+2); /* Read EFDR, extended function data register */
1474 outb(0x21,io+1);
1475 devrev=inb(io+2);
1476 outb(0x09,io+1);
1477 oldid=inb(io+2);
1478 outb(0xaa,io); /* Magic Seal */
1479
1480 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1481 goto out; /* protection against false positives */
1482
1483 decode_winbond(io,key,devid,devrev,oldid);
1484 out:
1485 release_region(io, 3);
1486 }
1487
1488 static void __devinit smsc_check(int io, int key)
1489 {
1490 int id,rev,oldid,oldrev,x_id,x_rev,x_oldid,x_oldrev;
1491
1492 if (!request_region(io, 3, __FUNCTION__))
1493 return;
1494
1495 /* First probe without the key */
1496 outb(0x0d,io);
1497 x_oldid=inb(io+1);
1498 outb(0x0e,io);
1499 x_oldrev=inb(io+1);
1500 outb(0x20,io);
1501 x_id=inb(io+1);
1502 outb(0x21,io);
1503 x_rev=inb(io+1);
1504
1505 outb(key,io);
1506 outb(key,io); /* Write Magic Sequence to EFER, extended
1507 funtion enable register */
1508 outb(0x0d,io); /* Write EFIR, extended function index register */
1509 oldid=inb(io+1); /* Read EFDR, extended function data register */
1510 outb(0x0e,io);
1511 oldrev=inb(io+1);
1512 outb(0x20,io);
1513 id=inb(io+1);
1514 outb(0x21,io);
1515 rev=inb(io+1);
1516 outb(0xaa,io); /* Magic Seal */
1517
1518 if ((x_id == id) && (x_oldrev == oldrev) &&
1519 (x_oldid == oldid) && (x_rev == rev))
1520 goto out; /* protection against false positives */
1521
1522 decode_smsc(io,key,oldid,oldrev);
1523 out:
1524 release_region(io, 3);
1525 }
1526
1527
1528 static void __devinit detect_and_report_winbond (void)
1529 {
1530 if (verbose_probing)
1531 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1532 winbond_check(0x3f0,0x87);
1533 winbond_check(0x370,0x87);
1534 winbond_check(0x2e ,0x87);
1535 winbond_check(0x4e ,0x87);
1536 winbond_check(0x3f0,0x86);
1537 winbond_check2(0x250,0x88);
1538 winbond_check2(0x250,0x89);
1539 }
1540
1541 static void __devinit detect_and_report_smsc (void)
1542 {
1543 if (verbose_probing)
1544 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1545 smsc_check(0x3f0,0x55);
1546 smsc_check(0x370,0x55);
1547 smsc_check(0x3f0,0x44);
1548 smsc_check(0x370,0x44);
1549 }
1550 #endif /* CONFIG_PARPORT_PC_SUPERIO */
1551
1552 static int get_superio_dma (struct parport *p)
1553 {
1554 int i=0;
1555 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1556 i++;
1557 if (i!=NR_SUPERIOS)
1558 return superios[i].dma;
1559 return PARPORT_DMA_NONE;
1560 }
1561
1562 static int get_superio_irq (struct parport *p)
1563 {
1564 int i=0;
1565 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1566 i++;
1567 if (i!=NR_SUPERIOS)
1568 return superios[i].irq;
1569 return PARPORT_IRQ_NONE;
1570 }
1571
1572
1573 /* --- Mode detection ------------------------------------- */
1574
1575 /*
1576 * Checks for port existence, all ports support SPP MODE
1577 * Returns:
1578 * 0 : No parallel port at this address
1579 * PARPORT_MODE_PCSPP : SPP port detected
1580 * (if the user specified an ioport himself,
1581 * this shall always be the case!)
1582 *
1583 */
1584 static int parport_SPP_supported(struct parport *pb)
1585 {
1586 unsigned char r, w;
1587
1588 /*
1589 * first clear an eventually pending EPP timeout
1590 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1591 * that does not even respond to SPP cycles if an EPP
1592 * timeout is pending
1593 */
1594 clear_epp_timeout(pb);
1595
1596 /* Do a simple read-write test to make sure the port exists. */
1597 w = 0xc;
1598 outb (w, CONTROL (pb));
1599
1600 /* Is there a control register that we can read from? Some
1601 * ports don't allow reads, so read_control just returns a
1602 * software copy. Some ports _do_ allow reads, so bypass the
1603 * software copy here. In addition, some bits aren't
1604 * writable. */
1605 r = inb (CONTROL (pb));
1606 if ((r & 0xf) == w) {
1607 w = 0xe;
1608 outb (w, CONTROL (pb));
1609 r = inb (CONTROL (pb));
1610 outb (0xc, CONTROL (pb));
1611 if ((r & 0xf) == w)
1612 return PARPORT_MODE_PCSPP;
1613 }
1614
1615 if (user_specified)
1616 /* That didn't work, but the user thinks there's a
1617 * port here. */
1618 printk (KERN_INFO "parport 0x%lx (WARNING): CTR: "
1619 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1620
1621 /* Try the data register. The data lines aren't tri-stated at
1622 * this stage, so we expect back what we wrote. */
1623 w = 0xaa;
1624 parport_pc_write_data (pb, w);
1625 r = parport_pc_read_data (pb);
1626 if (r == w) {
1627 w = 0x55;
1628 parport_pc_write_data (pb, w);
1629 r = parport_pc_read_data (pb);
1630 if (r == w)
1631 return PARPORT_MODE_PCSPP;
1632 }
1633
1634 if (user_specified) {
1635 /* Didn't work, but the user is convinced this is the
1636 * place. */
1637 printk (KERN_INFO "parport 0x%lx (WARNING): DATA: "
1638 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1639 printk (KERN_INFO "parport 0x%lx: You gave this address, "
1640 "but there is probably no parallel port there!\n",
1641 pb->base);
1642 }
1643
1644 /* It's possible that we can't read the control register or
1645 * the data register. In that case just believe the user. */
1646 if (user_specified)
1647 return PARPORT_MODE_PCSPP;
1648
1649 return 0;
1650 }
1651
1652 /* Check for ECR
1653 *
1654 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1655 * on these cards actually accesses the CTR.
1656 *
1657 * Modern cards don't do this but reading from ECR will return 0xff
1658 * regardless of what is written here if the card does NOT support
1659 * ECP.
1660 *
1661 * We first check to see if ECR is the same as CTR. If not, the low
1662 * two bits of ECR aren't writable, so we check by writing ECR and
1663 * reading it back to see if it's what we expect.
1664 */
1665 static int parport_ECR_present(struct parport *pb)
1666 {
1667 struct parport_pc_private *priv = pb->private_data;
1668 unsigned char r = 0xc;
1669
1670 outb (r, CONTROL (pb));
1671 if ((inb (ECONTROL (pb)) & 0x3) == (r & 0x3)) {
1672 outb (r ^ 0x2, CONTROL (pb)); /* Toggle bit 1 */
1673
1674 r = inb (CONTROL (pb));
1675 if ((inb (ECONTROL (pb)) & 0x2) == (r & 0x2))
1676 goto no_reg; /* Sure that no ECR register exists */
1677 }
1678
1679 if ((inb (ECONTROL (pb)) & 0x3 ) != 0x1)
1680 goto no_reg;
1681
1682 ECR_WRITE (pb, 0x34);
1683 if (inb (ECONTROL (pb)) != 0x35)
1684 goto no_reg;
1685
1686 priv->ecr = 1;
1687 outb (0xc, CONTROL (pb));
1688
1689 /* Go to mode 000 */
1690 frob_set_mode (pb, ECR_SPP);
1691
1692 return 1;
1693
1694 no_reg:
1695 outb (0xc, CONTROL (pb));
1696 return 0;
1697 }
1698
1699 #ifdef CONFIG_PARPORT_1284
1700 /* Detect PS/2 support.
1701 *
1702 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1703 * allows us to read data from the data lines. In theory we would get back
1704 * 0xff but any peripheral attached to the port may drag some or all of the
1705 * lines down to zero. So if we get back anything that isn't the contents
1706 * of the data register we deem PS/2 support to be present.
1707 *
1708 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1709 * drivers, but an external peripheral with sufficiently beefy drivers of
1710 * its own can overpower them and assert its own levels onto the bus, from
1711 * where they can then be read back as normal. Ports with this property
1712 * and the right type of device attached are likely to fail the SPP test,
1713 * (as they will appear to have stuck bits) and so the fact that they might
1714 * be misdetected here is rather academic.
1715 */
1716
1717 static int parport_PS2_supported(struct parport *pb)
1718 {
1719 int ok = 0;
1720
1721 clear_epp_timeout(pb);
1722
1723 /* try to tri-state the buffer */
1724 parport_pc_data_reverse (pb);
1725
1726 parport_pc_write_data(pb, 0x55);
1727 if (parport_pc_read_data(pb) != 0x55) ok++;
1728
1729 parport_pc_write_data(pb, 0xaa);
1730 if (parport_pc_read_data(pb) != 0xaa) ok++;
1731
1732 /* cancel input mode */
1733 parport_pc_data_forward (pb);
1734
1735 if (ok) {
1736 pb->modes |= PARPORT_MODE_TRISTATE;
1737 } else {
1738 struct parport_pc_private *priv = pb->private_data;
1739 priv->ctr_writable &= ~0x20;
1740 }
1741
1742 return ok;
1743 }
1744
1745 #ifdef CONFIG_PARPORT_PC_FIFO
1746 static int __devinit parport_ECP_supported(struct parport *pb)
1747 {
1748 int i;
1749 int config, configb;
1750 int pword;
1751 struct parport_pc_private *priv = pb->private_data;
1752 /* Translate ECP intrLine to ISA irq value */
1753 static const int intrline[]= { 0, 7, 9, 10, 11, 14, 15, 5 };
1754
1755 /* If there is no ECR, we have no hope of supporting ECP. */
1756 if (!priv->ecr)
1757 return 0;
1758
1759 /* Find out FIFO depth */
1760 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1761 ECR_WRITE (pb, ECR_TST << 5); /* TEST FIFO */
1762 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02); i++)
1763 outb (0xaa, FIFO (pb));
1764
1765 /*
1766 * Using LGS chipset it uses ECR register, but
1767 * it doesn't support ECP or FIFO MODE
1768 */
1769 if (i == 1024) {
1770 ECR_WRITE (pb, ECR_SPP << 5);
1771 return 0;
1772 }
1773
1774 priv->fifo_depth = i;
1775 if (verbose_probing)
1776 printk (KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1777
1778 /* Find out writeIntrThreshold */
1779 frob_econtrol (pb, 1<<2, 1<<2);
1780 frob_econtrol (pb, 1<<2, 0);
1781 for (i = 1; i <= priv->fifo_depth; i++) {
1782 inb (FIFO (pb));
1783 udelay (50);
1784 if (inb (ECONTROL (pb)) & (1<<2))
1785 break;
1786 }
1787
1788 if (i <= priv->fifo_depth) {
1789 if (verbose_probing)
1790 printk (KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1791 pb->base, i);
1792 } else
1793 /* Number of bytes we know we can write if we get an
1794 interrupt. */
1795 i = 0;
1796
1797 priv->writeIntrThreshold = i;
1798
1799 /* Find out readIntrThreshold */
1800 frob_set_mode (pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1801 parport_pc_data_reverse (pb); /* Must be in PS2 mode */
1802 frob_set_mode (pb, ECR_TST); /* Test FIFO */
1803 frob_econtrol (pb, 1<<2, 1<<2);
1804 frob_econtrol (pb, 1<<2, 0);
1805 for (i = 1; i <= priv->fifo_depth; i++) {
1806 outb (0xaa, FIFO (pb));
1807 if (inb (ECONTROL (pb)) & (1<<2))
1808 break;
1809 }
1810
1811 if (i <= priv->fifo_depth) {
1812 if (verbose_probing)
1813 printk (KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1814 pb->base, i);
1815 } else
1816 /* Number of bytes we can read if we get an interrupt. */
1817 i = 0;
1818
1819 priv->readIntrThreshold = i;
1820
1821 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1822 ECR_WRITE (pb, 0xf4); /* Configuration mode */
1823 config = inb (CONFIGA (pb));
1824 pword = (config >> 4) & 0x7;
1825 switch (pword) {
1826 case 0:
1827 pword = 2;
1828 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1829 pb->base);
1830 break;
1831 case 2:
1832 pword = 4;
1833 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1834 pb->base);
1835 break;
1836 default:
1837 printk (KERN_WARNING "0x%lx: Unknown implementation ID\n",
1838 pb->base);
1839 /* Assume 1 */
1840 case 1:
1841 pword = 1;
1842 }
1843 priv->pword = pword;
1844
1845 if (verbose_probing) {
1846 printk (KERN_DEBUG "0x%lx: PWord is %d bits\n", pb->base, 8 * pword);
1847
1848 printk (KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1849 config & 0x80 ? "Level" : "Pulses");
1850
1851 configb = inb (CONFIGB (pb));
1852 printk (KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1853 pb->base, config, configb);
1854 printk (KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1855 if ((configb >>3) & 0x07)
1856 printk("%d",intrline[(configb >>3) & 0x07]);
1857 else
1858 printk("<none or set by other means>");
1859 printk (" dma=");
1860 if( (configb & 0x03 ) == 0x00)
1861 printk("<none or set by other means>\n");
1862 else
1863 printk("%d\n",configb & 0x07);
1864 }
1865
1866 /* Go back to mode 000 */
1867 frob_set_mode (pb, ECR_SPP);
1868
1869 return 1;
1870 }
1871 #endif
1872
1873 static int parport_ECPPS2_supported(struct parport *pb)
1874 {
1875 const struct parport_pc_private *priv = pb->private_data;
1876 int result;
1877 unsigned char oecr;
1878
1879 if (!priv->ecr)
1880 return 0;
1881
1882 oecr = inb (ECONTROL (pb));
1883 ECR_WRITE (pb, ECR_PS2 << 5);
1884 result = parport_PS2_supported(pb);
1885 ECR_WRITE (pb, oecr);
1886 return result;
1887 }
1888
1889 /* EPP mode detection */
1890
1891 static int parport_EPP_supported(struct parport *pb)
1892 {
1893 const struct parport_pc_private *priv = pb->private_data;
1894
1895 /*
1896 * Theory:
1897 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1898 * when EPP is possible and is set high when an EPP timeout
1899 * occurs (EPP uses the HALT line to stop the CPU while it does
1900 * the byte transfer, an EPP timeout occurs if the attached
1901 * device fails to respond after 10 micro seconds).
1902 *
1903 * This bit is cleared by either reading it (National Semi)
1904 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1905 * This bit is always high in non EPP modes.
1906 */
1907
1908 /* If EPP timeout bit clear then EPP available */
1909 if (!clear_epp_timeout(pb)) {
1910 return 0; /* No way to clear timeout */
1911 }
1912
1913 /* Check for Intel bug. */
1914 if (priv->ecr) {
1915 unsigned char i;
1916 for (i = 0x00; i < 0x80; i += 0x20) {
1917 ECR_WRITE (pb, i);
1918 if (clear_epp_timeout (pb)) {
1919 /* Phony EPP in ECP. */
1920 return 0;
1921 }
1922 }
1923 }
1924
1925 pb->modes |= PARPORT_MODE_EPP;
1926
1927 /* Set up access functions to use EPP hardware. */
1928 pb->ops->epp_read_data = parport_pc_epp_read_data;
1929 pb->ops->epp_write_data = parport_pc_epp_write_data;
1930 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1931 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1932
1933 return 1;
1934 }
1935
1936 static int parport_ECPEPP_supported(struct parport *pb)
1937 {
1938 struct parport_pc_private *priv = pb->private_data;
1939 int result;
1940 unsigned char oecr;
1941
1942 if (!priv->ecr) {
1943 return 0;
1944 }
1945
1946 oecr = inb (ECONTROL (pb));
1947 /* Search for SMC style EPP+ECP mode */
1948 ECR_WRITE (pb, 0x80);
1949 outb (0x04, CONTROL (pb));
1950 result = parport_EPP_supported(pb);
1951
1952 ECR_WRITE (pb, oecr);
1953
1954 if (result) {
1955 /* Set up access functions to use ECP+EPP hardware. */
1956 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1957 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1958 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1959 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1960 }
1961
1962 return result;
1963 }
1964
1965 #else /* No IEEE 1284 support */
1966
1967 /* Don't bother probing for modes we know we won't use. */
1968 static int __devinit parport_PS2_supported(struct parport *pb) { return 0; }
1969 #ifdef CONFIG_PARPORT_PC_FIFO
1970 static int __devinit parport_ECP_supported(struct parport *pb) { return 0; }
1971 #endif
1972 static int __devinit parport_EPP_supported(struct parport *pb) { return 0; }
1973 static int __devinit parport_ECPEPP_supported(struct parport *pb){return 0;}
1974 static int __devinit parport_ECPPS2_supported(struct parport *pb){return 0;}
1975
1976 #endif /* No IEEE 1284 support */
1977
1978 /* --- IRQ detection -------------------------------------- */
1979
1980 /* Only if supports ECP mode */
1981 static int programmable_irq_support(struct parport *pb)
1982 {
1983 int irq, intrLine;
1984 unsigned char oecr = inb (ECONTROL (pb));
1985 static const int lookup[8] = {
1986 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1987 };
1988
1989 ECR_WRITE (pb, ECR_CNF << 5); /* Configuration MODE */
1990
1991 intrLine = (inb (CONFIGB (pb)) >> 3) & 0x07;
1992 irq = lookup[intrLine];
1993
1994 ECR_WRITE (pb, oecr);
1995 return irq;
1996 }
1997
1998 static int irq_probe_ECP(struct parport *pb)
1999 {
2000 int i;
2001 unsigned long irqs;
2002
2003 irqs = probe_irq_on();
2004
2005 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
2006 ECR_WRITE (pb, (ECR_TST << 5) | 0x04);
2007 ECR_WRITE (pb, ECR_TST << 5);
2008
2009 /* If Full FIFO sure that writeIntrThreshold is generated */
2010 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02) ; i++)
2011 outb (0xaa, FIFO (pb));
2012
2013 pb->irq = probe_irq_off(irqs);
2014 ECR_WRITE (pb, ECR_SPP << 5);
2015
2016 if (pb->irq <= 0)
2017 pb->irq = PARPORT_IRQ_NONE;
2018
2019 return pb->irq;
2020 }
2021
2022 /*
2023 * This detection seems that only works in National Semiconductors
2024 * This doesn't work in SMC, LGS, and Winbond
2025 */
2026 static int irq_probe_EPP(struct parport *pb)
2027 {
2028 #ifndef ADVANCED_DETECT
2029 return PARPORT_IRQ_NONE;
2030 #else
2031 int irqs;
2032 unsigned char oecr;
2033
2034 if (pb->modes & PARPORT_MODE_PCECR)
2035 oecr = inb (ECONTROL (pb));
2036
2037 irqs = probe_irq_on();
2038
2039 if (pb->modes & PARPORT_MODE_PCECR)
2040 frob_econtrol (pb, 0x10, 0x10);
2041
2042 clear_epp_timeout(pb);
2043 parport_pc_frob_control (pb, 0x20, 0x20);
2044 parport_pc_frob_control (pb, 0x10, 0x10);
2045 clear_epp_timeout(pb);
2046
2047 /* Device isn't expecting an EPP read
2048 * and generates an IRQ.
2049 */
2050 parport_pc_read_epp(pb);
2051 udelay(20);
2052
2053 pb->irq = probe_irq_off (irqs);
2054 if (pb->modes & PARPORT_MODE_PCECR)
2055 ECR_WRITE (pb, oecr);
2056 parport_pc_write_control(pb, 0xc);
2057
2058 if (pb->irq <= 0)
2059 pb->irq = PARPORT_IRQ_NONE;
2060
2061 return pb->irq;
2062 #endif /* Advanced detection */
2063 }
2064
2065 static int irq_probe_SPP(struct parport *pb)
2066 {
2067 /* Don't even try to do this. */
2068 return PARPORT_IRQ_NONE;
2069 }
2070
2071 /* We will attempt to share interrupt requests since other devices
2072 * such as sound cards and network cards seem to like using the
2073 * printer IRQs.
2074 *
2075 * When ECP is available we can autoprobe for IRQs.
2076 * NOTE: If we can autoprobe it, we can register the IRQ.
2077 */
2078 static int parport_irq_probe(struct parport *pb)
2079 {
2080 struct parport_pc_private *priv = pb->private_data;
2081
2082 if (priv->ecr) {
2083 pb->irq = programmable_irq_support(pb);
2084
2085 if (pb->irq == PARPORT_IRQ_NONE)
2086 pb->irq = irq_probe_ECP(pb);
2087 }
2088
2089 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
2090 (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 && (pb->modes & PARPORT_MODE_EPP))
2096 pb->irq = irq_probe_EPP(pb);
2097
2098 clear_epp_timeout(pb);
2099
2100 if (pb->irq == PARPORT_IRQ_NONE)
2101 pb->irq = irq_probe_SPP(pb);
2102
2103 if (pb->irq == PARPORT_IRQ_NONE)
2104 pb->irq = get_superio_irq(pb);
2105
2106 return pb->irq;
2107 }
2108
2109 /* --- DMA detection -------------------------------------- */
2110
2111 /* Only if chipset conforms to ECP ISA Interface Standard */
2112 static int programmable_dma_support (struct parport *p)
2113 {
2114 unsigned char oecr = inb (ECONTROL (p));
2115 int dma;
2116
2117 frob_set_mode (p, ECR_CNF);
2118
2119 dma = inb (CONFIGB(p)) & 0x07;
2120 /* 000: Indicates jumpered 8-bit DMA if read-only.
2121 100: Indicates jumpered 16-bit DMA if read-only. */
2122 if ((dma & 0x03) == 0)
2123 dma = PARPORT_DMA_NONE;
2124
2125 ECR_WRITE (p, oecr);
2126 return dma;
2127 }
2128
2129 static int parport_dma_probe (struct parport *p)
2130 {
2131 const struct parport_pc_private *priv = p->private_data;
2132 if (priv->ecr)
2133 p->dma = programmable_dma_support(p); /* ask ECP chipset first */
2134 if (p->dma == PARPORT_DMA_NONE) {
2135 /* ask known Super-IO chips proper, although these
2136 claim ECP compatible, some don't report their DMA
2137 conforming to ECP standards */
2138 p->dma = get_superio_dma(p);
2139 }
2140
2141 return p->dma;
2142 }
2143
2144 /* --- Initialisation code -------------------------------- */
2145
2146 static LIST_HEAD(ports_list);
2147 static DEFINE_SPINLOCK(ports_lock);
2148
2149 struct parport *parport_pc_probe_port (unsigned long int base,
2150 unsigned long int base_hi,
2151 int irq, int dma,
2152 struct device *dev)
2153 {
2154 struct parport_pc_private *priv;
2155 struct parport_operations *ops;
2156 struct parport *p;
2157 int probedirq = PARPORT_IRQ_NONE;
2158 struct resource *base_res;
2159 struct resource *ECR_res = NULL;
2160 struct resource *EPP_res = NULL;
2161 struct platform_device *pdev = NULL;
2162
2163 if (!dev) {
2164 /* We need a physical device to attach to, but none was
2165 * provided. Create our own. */
2166 pdev = platform_device_register_simple("parport_pc",
2167 base, NULL, 0);
2168 if (IS_ERR(pdev))
2169 return NULL;
2170 dev = &pdev->dev;
2171 }
2172
2173 ops = kmalloc(sizeof (struct parport_operations), GFP_KERNEL);
2174 if (!ops)
2175 goto out1;
2176
2177 priv = kmalloc (sizeof (struct parport_pc_private), GFP_KERNEL);
2178 if (!priv)
2179 goto out2;
2180
2181 /* a misnomer, actually - it's allocate and reserve parport number */
2182 p = parport_register_port(base, irq, dma, ops);
2183 if (!p)
2184 goto out3;
2185
2186 base_res = request_region(base, 3, p->name);
2187 if (!base_res)
2188 goto out4;
2189
2190 memcpy(ops, &parport_pc_ops, sizeof (struct parport_operations));
2191 priv->ctr = 0xc;
2192 priv->ctr_writable = ~0x10;
2193 priv->ecr = 0;
2194 priv->fifo_depth = 0;
2195 priv->dma_buf = NULL;
2196 priv->dma_handle = 0;
2197 INIT_LIST_HEAD(&priv->list);
2198 priv->port = p;
2199
2200 p->dev = dev;
2201 p->base_hi = base_hi;
2202 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2203 p->private_data = priv;
2204
2205 if (base_hi) {
2206 ECR_res = request_region(base_hi, 3, p->name);
2207 if (ECR_res)
2208 parport_ECR_present(p);
2209 }
2210
2211 if (base != 0x3bc) {
2212 EPP_res = request_region(base+0x3, 5, p->name);
2213 if (EPP_res)
2214 if (!parport_EPP_supported(p))
2215 parport_ECPEPP_supported(p);
2216 }
2217 if (!parport_SPP_supported (p))
2218 /* No port. */
2219 goto out5;
2220 if (priv->ecr)
2221 parport_ECPPS2_supported(p);
2222 else
2223 parport_PS2_supported(p);
2224
2225 p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
2226
2227 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2228 if (p->base_hi && priv->ecr)
2229 printk(" (0x%lx)", p->base_hi);
2230 if (p->irq == PARPORT_IRQ_AUTO) {
2231 p->irq = PARPORT_IRQ_NONE;
2232 parport_irq_probe(p);
2233 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2234 p->irq = PARPORT_IRQ_NONE;
2235 parport_irq_probe(p);
2236 probedirq = p->irq;
2237 p->irq = PARPORT_IRQ_NONE;
2238 }
2239 if (p->irq != PARPORT_IRQ_NONE) {
2240 printk(", irq %d", p->irq);
2241 priv->ctr_writable |= 0x10;
2242
2243 if (p->dma == PARPORT_DMA_AUTO) {
2244 p->dma = PARPORT_DMA_NONE;
2245 parport_dma_probe(p);
2246 }
2247 }
2248 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2249 is mandatory (see above) */
2250 p->dma = PARPORT_DMA_NONE;
2251
2252 #ifdef CONFIG_PARPORT_PC_FIFO
2253 if (parport_ECP_supported(p) &&
2254 p->dma != PARPORT_DMA_NOFIFO &&
2255 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2256 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2257 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2258 #ifdef CONFIG_PARPORT_1284
2259 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2260 /* currently broken, but working on it.. (FB) */
2261 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2262 #endif /* IEEE 1284 support */
2263 if (p->dma != PARPORT_DMA_NONE) {
2264 printk(", dma %d", p->dma);
2265 p->modes |= PARPORT_MODE_DMA;
2266 }
2267 else printk(", using FIFO");
2268 }
2269 else
2270 /* We can't use the DMA channel after all. */
2271 p->dma = PARPORT_DMA_NONE;
2272 #endif /* Allowed to use FIFO/DMA */
2273
2274 printk(" [");
2275 #define printmode(x) {if(p->modes&PARPORT_MODE_##x){printk("%s%s",f?",":"",#x);f++;}}
2276 {
2277 int f = 0;
2278 printmode(PCSPP);
2279 printmode(TRISTATE);
2280 printmode(COMPAT)
2281 printmode(EPP);
2282 printmode(ECP);
2283 printmode(DMA);
2284 }
2285 #undef printmode
2286 #ifndef CONFIG_PARPORT_1284
2287 printk ("(,...)");
2288 #endif /* CONFIG_PARPORT_1284 */
2289 printk("]\n");
2290 if (probedirq != PARPORT_IRQ_NONE)
2291 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2292
2293 /* If No ECP release the ports grabbed above. */
2294 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2295 release_region(base_hi, 3);
2296 ECR_res = NULL;
2297 }
2298 /* Likewise for EEP ports */
2299 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2300 release_region(base+3, 5);
2301 EPP_res = NULL;
2302 }
2303 if (p->irq != PARPORT_IRQ_NONE) {
2304 if (request_irq (p->irq, parport_pc_interrupt,
2305 0, p->name, p)) {
2306 printk (KERN_WARNING "%s: irq %d in use, "
2307 "resorting to polled operation\n",
2308 p->name, p->irq);
2309 p->irq = PARPORT_IRQ_NONE;
2310 p->dma = PARPORT_DMA_NONE;
2311 }
2312
2313 #ifdef CONFIG_PARPORT_PC_FIFO
2314 #ifdef HAS_DMA
2315 if (p->dma != PARPORT_DMA_NONE) {
2316 if (request_dma (p->dma, p->name)) {
2317 printk (KERN_WARNING "%s: dma %d in use, "
2318 "resorting to PIO operation\n",
2319 p->name, p->dma);
2320 p->dma = PARPORT_DMA_NONE;
2321 } else {
2322 priv->dma_buf =
2323 dma_alloc_coherent(dev,
2324 PAGE_SIZE,
2325 &priv->dma_handle,
2326 GFP_KERNEL);
2327 if (! priv->dma_buf) {
2328 printk (KERN_WARNING "%s: "
2329 "cannot get buffer for DMA, "
2330 "resorting to PIO operation\n",
2331 p->name);
2332 free_dma(p->dma);
2333 p->dma = PARPORT_DMA_NONE;
2334 }
2335 }
2336 }
2337 #endif
2338 #endif
2339 }
2340
2341 /* Done probing. Now put the port into a sensible start-up state. */
2342 if (priv->ecr)
2343 /*
2344 * Put the ECP detected port in PS2 mode.
2345 * Do this also for ports that have ECR but don't do ECP.
2346 */
2347 ECR_WRITE (p, 0x34);
2348
2349 parport_pc_write_data(p, 0);
2350 parport_pc_data_forward (p);
2351
2352 /* Now that we've told the sharing engine about the port, and
2353 found out its characteristics, let the high-level drivers
2354 know about it. */
2355 spin_lock(&ports_lock);
2356 list_add(&priv->list, &ports_list);
2357 spin_unlock(&ports_lock);
2358 parport_announce_port (p);
2359
2360 return p;
2361
2362 out5:
2363 if (ECR_res)
2364 release_region(base_hi, 3);
2365 if (EPP_res)
2366 release_region(base+0x3, 5);
2367 release_region(base, 3);
2368 out4:
2369 parport_put_port(p);
2370 out3:
2371 kfree (priv);
2372 out2:
2373 kfree (ops);
2374 out1:
2375 if (pdev)
2376 platform_device_unregister(pdev);
2377 return NULL;
2378 }
2379
2380 EXPORT_SYMBOL (parport_pc_probe_port);
2381
2382 void parport_pc_unregister_port (struct parport *p)
2383 {
2384 struct parport_pc_private *priv = p->private_data;
2385 struct parport_operations *ops = p->ops;
2386
2387 parport_remove_port(p);
2388 spin_lock(&ports_lock);
2389 list_del_init(&priv->list);
2390 spin_unlock(&ports_lock);
2391 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2392 if (p->dma != PARPORT_DMA_NONE)
2393 free_dma(p->dma);
2394 #endif
2395 if (p->irq != PARPORT_IRQ_NONE)
2396 free_irq(p->irq, p);
2397 release_region(p->base, 3);
2398 if (p->size > 3)
2399 release_region(p->base + 3, p->size - 3);
2400 if (p->modes & PARPORT_MODE_ECP)
2401 release_region(p->base_hi, 3);
2402 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2403 if (priv->dma_buf)
2404 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2405 priv->dma_buf,
2406 priv->dma_handle);
2407 #endif
2408 kfree (p->private_data);
2409 parport_put_port(p);
2410 kfree (ops); /* hope no-one cached it */
2411 }
2412
2413 EXPORT_SYMBOL (parport_pc_unregister_port);
2414
2415 #ifdef CONFIG_PCI
2416
2417 /* ITE support maintained by Rich Liu <richliu@poorman.org> */
2418 static int __devinit sio_ite_8872_probe (struct pci_dev *pdev, int autoirq,
2419 int autodma,
2420 const struct parport_pc_via_data *via)
2421 {
2422 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2423 struct resource *base_res;
2424 u32 ite8872set;
2425 u32 ite8872_lpt, ite8872_lpthi;
2426 u8 ite8872_irq, type;
2427 int irq;
2428 int i;
2429
2430 DPRINTK (KERN_DEBUG "sio_ite_8872_probe()\n");
2431
2432 // make sure which one chip
2433 for(i = 0; i < 5; i++) {
2434 base_res = request_region(inta_addr[i], 32, "it887x");
2435 if (base_res) {
2436 int test;
2437 pci_write_config_dword (pdev, 0x60,
2438 0xe5000000 | inta_addr[i]);
2439 pci_write_config_dword (pdev, 0x78,
2440 0x00000000 | inta_addr[i]);
2441 test = inb (inta_addr[i]);
2442 if (test != 0xff) break;
2443 release_region(inta_addr[i], 0x8);
2444 }
2445 }
2446 if(i >= 5) {
2447 printk (KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2448 return 0;
2449 }
2450
2451 type = inb (inta_addr[i] + 0x18);
2452 type &= 0x0f;
2453
2454 switch (type) {
2455 case 0x2:
2456 printk (KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2457 ite8872set = 0x64200000;
2458 break;
2459 case 0xa:
2460 printk (KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2461 ite8872set = 0x64200000;
2462 break;
2463 case 0xe:
2464 printk (KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2465 ite8872set = 0x64e00000;
2466 break;
2467 case 0x6:
2468 printk (KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2469 return 0;
2470 case 0x8:
2471 DPRINTK (KERN_DEBUG "parport_pc: ITE8874 found (2S)\n");
2472 return 0;
2473 default:
2474 printk (KERN_INFO "parport_pc: unknown ITE887x\n");
2475 printk (KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2476 "output to Rich.Liu@ite.com.tw\n");
2477 return 0;
2478 }
2479
2480 pci_read_config_byte (pdev, 0x3c, &ite8872_irq);
2481 pci_read_config_dword (pdev, 0x1c, &ite8872_lpt);
2482 ite8872_lpt &= 0x0000ff00;
2483 pci_read_config_dword (pdev, 0x20, &ite8872_lpthi);
2484 ite8872_lpthi &= 0x0000ff00;
2485 pci_write_config_dword (pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2486 pci_write_config_dword (pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2487 pci_write_config_dword (pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2488 // SET SPP&EPP , Parallel Port NO DMA , Enable All Function
2489 // SET Parallel IRQ
2490 pci_write_config_dword (pdev, 0x9c,
2491 ite8872set | (ite8872_irq * 0x11111));
2492
2493 DPRINTK (KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2494 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2495 ite8872_lpt);
2496 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2497 ite8872_lpthi);
2498
2499 /* Let the user (or defaults) steer us away from interrupts */
2500 irq = ite8872_irq;
2501 if (autoirq != PARPORT_IRQ_AUTO)
2502 irq = PARPORT_IRQ_NONE;
2503
2504 /*
2505 * Release the resource so that parport_pc_probe_port can get it.
2506 */
2507 release_resource(base_res);
2508 if (parport_pc_probe_port (ite8872_lpt, ite8872_lpthi,
2509 irq, PARPORT_DMA_NONE, &pdev->dev)) {
2510 printk (KERN_INFO
2511 "parport_pc: ITE 8872 parallel port: io=0x%X",
2512 ite8872_lpt);
2513 if (irq != PARPORT_IRQ_NONE)
2514 printk (", irq=%d", irq);
2515 printk ("\n");
2516 return 1;
2517 }
2518
2519 return 0;
2520 }
2521
2522 /* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2523 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2524 static int __devinitdata parport_init_mode = 0;
2525
2526 /* Data for two known VIA chips */
2527 static struct parport_pc_via_data via_686a_data __devinitdata = {
2528 0x51,
2529 0x50,
2530 0x85,
2531 0x02,
2532 0xE2,
2533 0xF0,
2534 0xE6
2535 };
2536 static struct parport_pc_via_data via_8231_data __devinitdata = {
2537 0x45,
2538 0x44,
2539 0x50,
2540 0x04,
2541 0xF2,
2542 0xFA,
2543 0xF6
2544 };
2545
2546 static int __devinit sio_via_probe (struct pci_dev *pdev, int autoirq,
2547 int autodma,
2548 const struct parport_pc_via_data *via)
2549 {
2550 u8 tmp, tmp2, siofunc;
2551 u8 ppcontrol = 0;
2552 int dma, irq;
2553 unsigned port1, port2;
2554 unsigned have_epp = 0;
2555
2556 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2557
2558 switch(parport_init_mode)
2559 {
2560 case 1:
2561 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2562 siofunc = VIA_FUNCTION_PARPORT_SPP;
2563 break;
2564 case 2:
2565 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2566 siofunc = VIA_FUNCTION_PARPORT_SPP;
2567 ppcontrol = VIA_PARPORT_BIDIR;
2568 break;
2569 case 3:
2570 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2571 siofunc = VIA_FUNCTION_PARPORT_EPP;
2572 ppcontrol = VIA_PARPORT_BIDIR;
2573 have_epp = 1;
2574 break;
2575 case 4:
2576 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2577 siofunc = VIA_FUNCTION_PARPORT_ECP;
2578 ppcontrol = VIA_PARPORT_BIDIR;
2579 break;
2580 case 5:
2581 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2582 siofunc = VIA_FUNCTION_PARPORT_ECP;
2583 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2584 have_epp = 1;
2585 break;
2586 default:
2587 printk(KERN_DEBUG "parport_pc: probing current configuration\n");
2588 siofunc = VIA_FUNCTION_PROBE;
2589 break;
2590 }
2591 /*
2592 * unlock super i/o configuration
2593 */
2594 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2595 tmp |= via->via_pci_superio_config_data;
2596 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2597
2598 /* Bits 1-0: Parallel Port Mode / Enable */
2599 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2600 tmp = inb (VIA_CONFIG_DATA);
2601 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2602 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2603 tmp2 = inb (VIA_CONFIG_DATA);
2604 if (siofunc == VIA_FUNCTION_PROBE)
2605 {
2606 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2607 ppcontrol = tmp2;
2608 }
2609 else
2610 {
2611 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2612 tmp |= siofunc;
2613 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2614 outb(tmp, VIA_CONFIG_DATA);
2615 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2616 tmp2 |= ppcontrol;
2617 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2618 outb(tmp2, VIA_CONFIG_DATA);
2619 }
2620
2621 /* Parallel Port I/O Base Address, bits 9-2 */
2622 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2623 port1 = inb(VIA_CONFIG_DATA) << 2;
2624
2625 printk (KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",port1);
2626 if ((port1 == 0x3BC) && have_epp)
2627 {
2628 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2629 outb((0x378 >> 2), VIA_CONFIG_DATA);
2630 printk(KERN_DEBUG "parport_pc: Parallel port base changed to 0x378\n");
2631 port1 = 0x378;
2632 }
2633
2634 /*
2635 * lock super i/o configuration
2636 */
2637 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2638 tmp &= ~via->via_pci_superio_config_data;
2639 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2640
2641 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2642 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2643 return 0;
2644 }
2645
2646 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2647 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2648 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2649
2650 if (siofunc == VIA_FUNCTION_PARPORT_ECP)
2651 {
2652 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2653 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2654 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2655 }
2656 else
2657 /* if ECP not enabled, DMA is not enabled, assumed bogus 'dma' value */
2658 dma = PARPORT_DMA_NONE;
2659
2660 /* Let the user (or defaults) steer us away from interrupts and DMA */
2661 if (autoirq == PARPORT_IRQ_NONE) {
2662 irq = PARPORT_IRQ_NONE;
2663 dma = PARPORT_DMA_NONE;
2664 }
2665 if (autodma == PARPORT_DMA_NONE)
2666 dma = PARPORT_DMA_NONE;
2667
2668 switch (port1) {
2669 case 0x3bc: port2 = 0x7bc; break;
2670 case 0x378: port2 = 0x778; break;
2671 case 0x278: port2 = 0x678; break;
2672 default:
2673 printk(KERN_INFO "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2674 port1);
2675 return 0;
2676 }
2677
2678 /* filter bogus IRQs */
2679 switch (irq) {
2680 case 0:
2681 case 2:
2682 case 8:
2683 case 13:
2684 irq = PARPORT_IRQ_NONE;
2685 break;
2686
2687 default: /* do nothing */
2688 break;
2689 }
2690
2691 /* finally, do the probe with values obtained */
2692 if (parport_pc_probe_port (port1, port2, irq, dma, &pdev->dev)) {
2693 printk (KERN_INFO
2694 "parport_pc: VIA parallel port: io=0x%X", port1);
2695 if (irq != PARPORT_IRQ_NONE)
2696 printk (", irq=%d", irq);
2697 if (dma != PARPORT_DMA_NONE)
2698 printk (", dma=%d", dma);
2699 printk ("\n");
2700 return 1;
2701 }
2702
2703 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2704 port1, irq, dma);
2705 return 0;
2706 }
2707
2708
2709 enum parport_pc_sio_types {
2710 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2711 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2712 sio_ite_8872,
2713 last_sio
2714 };
2715
2716 /* each element directly indexed from enum list, above */
2717 static struct parport_pc_superio {
2718 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2719 const struct parport_pc_via_data *via);
2720 const struct parport_pc_via_data *via;
2721 } parport_pc_superio_info[] __devinitdata = {
2722 { sio_via_probe, &via_686a_data, },
2723 { sio_via_probe, &via_8231_data, },
2724 { sio_ite_8872_probe, NULL, },
2725 };
2726
2727 enum parport_pc_pci_cards {
2728 siig_1p_10x = last_sio,
2729 siig_2p_10x,
2730 siig_1p_20x,
2731 siig_2p_20x,
2732 lava_parallel,
2733 lava_parallel_dual_a,
2734 lava_parallel_dual_b,
2735 boca_ioppar,
2736 plx_9050,
2737 timedia_4078a,
2738 timedia_4079h,
2739 timedia_4085h,
2740 timedia_4088a,
2741 timedia_4089a,
2742 timedia_4095a,
2743 timedia_4096a,
2744 timedia_4078u,
2745 timedia_4079a,
2746 timedia_4085u,
2747 timedia_4079r,
2748 timedia_4079s,
2749 timedia_4079d,
2750 timedia_4079e,
2751 timedia_4079f,
2752 timedia_9079a,
2753 timedia_9079b,
2754 timedia_9079c,
2755 timedia_4006a,
2756 timedia_4014,
2757 timedia_4008a,
2758 timedia_4018,
2759 timedia_9018a,
2760 syba_2p_epp,
2761 syba_1p_ecp,
2762 titan_010l,
2763 titan_1284p1,
2764 titan_1284p2,
2765 avlab_1p,
2766 avlab_2p,
2767 oxsemi_952,
2768 oxsemi_954,
2769 oxsemi_840,
2770 aks_0100,
2771 mobility_pp,
2772 netmos_9705,
2773 netmos_9715,
2774 netmos_9755,
2775 netmos_9805,
2776 netmos_9815,
2777 };
2778
2779
2780 /* each element directly indexed from enum list, above
2781 * (but offset by last_sio) */
2782 static struct parport_pc_pci {
2783 int numports;
2784 struct { /* BAR (base address registers) numbers in the config
2785 space header */
2786 int lo;
2787 int hi; /* -1 if not there, >6 for offset-method (max
2788 BAR is 6) */
2789 } addr[4];
2790
2791 /* If set, this is called immediately after pci_enable_device.
2792 * If it returns non-zero, no probing will take place and the
2793 * ports will not be used. */
2794 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2795
2796 /* If set, this is called after probing for ports. If 'failed'
2797 * is non-zero we couldn't use any of the ports. */
2798 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2799 } cards[] = {
2800 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2801 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2802 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2803 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2804 /* lava_parallel */ { 1, { { 0, -1 }, } },
2805 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2806 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2807 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2808 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2809 /* timedia_4078a */ { 1, { { 2, -1 }, } },
2810 /* timedia_4079h */ { 1, { { 2, 3 }, } },
2811 /* timedia_4085h */ { 2, { { 2, -1 }, { 4, -1 }, } },
2812 /* timedia_4088a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2813 /* timedia_4089a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2814 /* timedia_4095a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2815 /* timedia_4096a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2816 /* timedia_4078u */ { 1, { { 2, -1 }, } },
2817 /* timedia_4079a */ { 1, { { 2, 3 }, } },
2818 /* timedia_4085u */ { 2, { { 2, -1 }, { 4, -1 }, } },
2819 /* timedia_4079r */ { 1, { { 2, 3 }, } },
2820 /* timedia_4079s */ { 1, { { 2, 3 }, } },
2821 /* timedia_4079d */ { 1, { { 2, 3 }, } },
2822 /* timedia_4079e */ { 1, { { 2, 3 }, } },
2823 /* timedia_4079f */ { 1, { { 2, 3 }, } },
2824 /* timedia_9079a */ { 1, { { 2, 3 }, } },
2825 /* timedia_9079b */ { 1, { { 2, 3 }, } },
2826 /* timedia_9079c */ { 1, { { 2, 3 }, } },
2827 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2828 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2829 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2830 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2831 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2832 /* SYBA uses fixed offsets in
2833 a 1K io window */
2834 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2835 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2836 /* titan_010l */ { 1, { { 3, -1 }, } },
2837 /* titan_1284p1 */ { 1, { { 0, 1 }, } },
2838 /* titan_1284p2 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2839 /* avlab_1p */ { 1, { { 0, 1}, } },
2840 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2841 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2842 * and 840 locks up if you write 1 to bit 2! */
2843 /* oxsemi_952 */ { 1, { { 0, 1 }, } },
2844 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2845 /* oxsemi_840 */ { 1, { { 0, -1 }, } },
2846 /* aks_0100 */ { 1, { { 0, -1 }, } },
2847 /* mobility_pp */ { 1, { { 0, 1 }, } },
2848 /* netmos_9705 */ { 1, { { 0, -1 }, } }, /* untested */
2849 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2850 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2851 /* netmos_9805 */ { 1, { { 0, -1 }, } }, /* untested */
2852 /* netmos_9815 */ { 2, { { 0, -1 }, { 2, -1 }, } }, /* untested */
2853 };
2854
2855 static const struct pci_device_id parport_pc_pci_tbl[] = {
2856 /* Super-IO onboard chips */
2857 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2858 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2859 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2860 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2861
2862 /* PCI cards */
2863 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2864 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2865 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2866 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2867 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2868 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2869 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2870 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2871 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2872 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2873 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2874 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2875 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2876 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2877 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2878 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2879 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2880 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0,0, plx_9050 },
2881 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2882 { 0x1409, 0x7168, 0x1409, 0x4078, 0, 0, timedia_4078a },
2883 { 0x1409, 0x7168, 0x1409, 0x4079, 0, 0, timedia_4079h },
2884 { 0x1409, 0x7168, 0x1409, 0x4085, 0, 0, timedia_4085h },
2885 { 0x1409, 0x7168, 0x1409, 0x4088, 0, 0, timedia_4088a },
2886 { 0x1409, 0x7168, 0x1409, 0x4089, 0, 0, timedia_4089a },
2887 { 0x1409, 0x7168, 0x1409, 0x4095, 0, 0, timedia_4095a },
2888 { 0x1409, 0x7168, 0x1409, 0x4096, 0, 0, timedia_4096a },
2889 { 0x1409, 0x7168, 0x1409, 0x5078, 0, 0, timedia_4078u },
2890 { 0x1409, 0x7168, 0x1409, 0x5079, 0, 0, timedia_4079a },
2891 { 0x1409, 0x7168, 0x1409, 0x5085, 0, 0, timedia_4085u },
2892 { 0x1409, 0x7168, 0x1409, 0x6079, 0, 0, timedia_4079r },
2893 { 0x1409, 0x7168, 0x1409, 0x7079, 0, 0, timedia_4079s },
2894 { 0x1409, 0x7168, 0x1409, 0x8079, 0, 0, timedia_4079d },
2895 { 0x1409, 0x7168, 0x1409, 0x9079, 0, 0, timedia_4079e },
2896 { 0x1409, 0x7168, 0x1409, 0xa079, 0, 0, timedia_4079f },
2897 { 0x1409, 0x7168, 0x1409, 0xb079, 0, 0, timedia_9079a },
2898 { 0x1409, 0x7168, 0x1409, 0xc079, 0, 0, timedia_9079b },
2899 { 0x1409, 0x7168, 0x1409, 0xd079, 0, 0, timedia_9079c },
2900 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2901 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2902 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2903 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2904 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2905 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2906 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2907 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2908 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2909 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2910 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2911 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2912 { 0x9710, 0x9805, 0x1000, 0x0010, 0, 0, titan_1284p1 },
2913 { 0x9710, 0x9815, 0x1000, 0x0020, 0, 0, titan_1284p2 },
2914 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2915 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p}, /* AFAVLAB_TK9902 */
2916 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2917 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2918 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2919 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2920 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2921 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2922 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2923 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2924 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2925 /* NetMos communication controllers */
2926 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2927 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2928 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2929 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2930 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2931 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2932 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2933 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2934 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2935 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2936 { 0, } /* terminate list */
2937 };
2938 MODULE_DEVICE_TABLE(pci,parport_pc_pci_tbl);
2939
2940 struct pci_parport_data {
2941 int num;
2942 struct parport *ports[2];
2943 };
2944
2945 static int parport_pc_pci_probe (struct pci_dev *dev,
2946 const struct pci_device_id *id)
2947 {
2948 int err, count, n, i = id->driver_data;
2949 struct pci_parport_data *data;
2950
2951 if (i < last_sio)
2952 /* This is an onboard Super-IO and has already been probed */
2953 return 0;
2954
2955 /* This is a PCI card */
2956 i -= last_sio;
2957 count = 0;
2958 if ((err = pci_enable_device (dev)) != 0)
2959 return err;
2960
2961 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2962 if (!data)
2963 return -ENOMEM;
2964
2965 if (cards[i].preinit_hook &&
2966 cards[i].preinit_hook (dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2967 kfree(data);
2968 return -ENODEV;
2969 }
2970
2971 for (n = 0; n < cards[i].numports; n++) {
2972 int lo = cards[i].addr[n].lo;
2973 int hi = cards[i].addr[n].hi;
2974 unsigned long io_lo, io_hi;
2975 io_lo = pci_resource_start (dev, lo);
2976 io_hi = 0;
2977 if ((hi >= 0) && (hi <= 6))
2978 io_hi = pci_resource_start (dev, hi);
2979 else if (hi > 6)
2980 io_lo += hi; /* Reinterpret the meaning of
2981 "hi" as an offset (see SYBA
2982 def.) */
2983 /* TODO: test if sharing interrupts works */
2984 printk (KERN_DEBUG "PCI parallel port detected: %04x:%04x, "
2985 "I/O at %#lx(%#lx)\n",
2986 parport_pc_pci_tbl[i + last_sio].vendor,
2987 parport_pc_pci_tbl[i + last_sio].device, io_lo, io_hi);
2988 data->ports[count] =
2989 parport_pc_probe_port (io_lo, io_hi, PARPORT_IRQ_NONE,
2990 PARPORT_DMA_NONE, &dev->dev);
2991 if (data->ports[count])
2992 count++;
2993 }
2994
2995 data->num = count;
2996
2997 if (cards[i].postinit_hook)
2998 cards[i].postinit_hook (dev, count == 0);
2999
3000 if (count) {
3001 pci_set_drvdata(dev, data);
3002 return 0;
3003 }
3004
3005 kfree(data);
3006
3007 return -ENODEV;
3008 }
3009
3010 static void __devexit parport_pc_pci_remove(struct pci_dev *dev)
3011 {
3012 struct pci_parport_data *data = pci_get_drvdata(dev);
3013 int i;
3014
3015 pci_set_drvdata(dev, NULL);
3016
3017 if (data) {
3018 for (i = data->num - 1; i >= 0; i--)
3019 parport_pc_unregister_port(data->ports[i]);
3020
3021 kfree(data);
3022 }
3023 }
3024
3025 static struct pci_driver parport_pc_pci_driver = {
3026 .name = "parport_pc",
3027 .id_table = parport_pc_pci_tbl,
3028 .probe = parport_pc_pci_probe,
3029 .remove = __devexit_p(parport_pc_pci_remove),
3030 };
3031
3032 static int __init parport_pc_init_superio (int autoirq, int autodma)
3033 {
3034 const struct pci_device_id *id;
3035 struct pci_dev *pdev = NULL;
3036 int ret = 0;
3037
3038 for_each_pci_dev(pdev) {
3039 id = pci_match_id(parport_pc_pci_tbl, pdev);
3040 if (id == NULL || id->driver_data >= last_sio)
3041 continue;
3042
3043 if (parport_pc_superio_info[id->driver_data].probe
3044 (pdev, autoirq, autodma,parport_pc_superio_info[id->driver_data].via)) {
3045 ret++;
3046 }
3047 }
3048
3049 return ret; /* number of devices found */
3050 }
3051 #else
3052 static struct pci_driver parport_pc_pci_driver;
3053 static int __init parport_pc_init_superio(int autoirq, int autodma) {return 0;}
3054 #endif /* CONFIG_PCI */
3055
3056
3057 static const struct pnp_device_id parport_pc_pnp_tbl[] = {
3058 /* Standard LPT Printer Port */
3059 {.id = "PNP0400", .driver_data = 0},
3060 /* ECP Printer Port */
3061 {.id = "PNP0401", .driver_data = 0},
3062 { }
3063 };
3064
3065 MODULE_DEVICE_TABLE(pnp,parport_pc_pnp_tbl);
3066
3067 static int parport_pc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
3068 {
3069 struct parport *pdata;
3070 unsigned long io_lo, io_hi;
3071 int dma, irq;
3072
3073 if (pnp_port_valid(dev,0) &&
3074 !(pnp_port_flags(dev,0) & IORESOURCE_DISABLED)) {
3075 io_lo = pnp_port_start(dev,0);
3076 } else
3077 return -EINVAL;
3078
3079 if (pnp_port_valid(dev,1) &&
3080 !(pnp_port_flags(dev,1) & IORESOURCE_DISABLED)) {
3081 io_hi = pnp_port_start(dev,1);
3082 } else
3083 io_hi = 0;
3084
3085 if (pnp_irq_valid(dev,0) &&
3086 !(pnp_irq_flags(dev,0) & IORESOURCE_DISABLED)) {
3087 irq = pnp_irq(dev,0);
3088 } else
3089 irq = PARPORT_IRQ_NONE;
3090
3091 if (pnp_dma_valid(dev,0) &&
3092 !(pnp_dma_flags(dev,0) & IORESOURCE_DISABLED)) {
3093 dma = pnp_dma(dev,0);
3094 } else
3095 dma = PARPORT_DMA_NONE;
3096
3097 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
3098 if (!(pdata = parport_pc_probe_port (io_lo, io_hi, irq, dma, &dev->dev)))
3099 return -ENODEV;
3100
3101 pnp_set_drvdata(dev,pdata);
3102 return 0;
3103 }
3104
3105 static void parport_pc_pnp_remove(struct pnp_dev *dev)
3106 {
3107 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3108 if (!pdata)
3109 return;
3110
3111 parport_pc_unregister_port(pdata);
3112 }
3113
3114 /* we only need the pnp layer to activate the device, at least for now */
3115 static struct pnp_driver parport_pc_pnp_driver = {
3116 .name = "parport_pc",
3117 .id_table = parport_pc_pnp_tbl,
3118 .probe = parport_pc_pnp_probe,
3119 .remove = parport_pc_pnp_remove,
3120 };
3121
3122
3123 static int __devinit parport_pc_platform_probe(struct platform_device *pdev)
3124 {
3125 /* Always succeed, the actual probing is done in
3126 * parport_pc_probe_port(). */
3127 return 0;
3128 }
3129
3130 static struct platform_driver parport_pc_platform_driver = {
3131 .driver = {
3132 .owner = THIS_MODULE,
3133 .name = "parport_pc",
3134 },
3135 .probe = parport_pc_platform_probe,
3136 };
3137
3138 /* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3139 static int __devinit __attribute__((unused))
3140 parport_pc_find_isa_ports (int autoirq, int autodma)
3141 {
3142 int count = 0;
3143
3144 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL))
3145 count++;
3146 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL))
3147 count++;
3148 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL))
3149 count++;
3150
3151 return count;
3152 }
3153
3154 /* This function is called by parport_pc_init if the user didn't
3155 * specify any ports to probe. Its job is to find some ports. Order
3156 * is important here -- we want ISA ports to be registered first,
3157 * followed by PCI cards (for least surprise), but before that we want
3158 * to do chipset-specific tests for some onboard ports that we know
3159 * about.
3160 *
3161 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3162 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3163 */
3164 static void __init parport_pc_find_ports (int autoirq, int autodma)
3165 {
3166 int count = 0, err;
3167
3168 #ifdef CONFIG_PARPORT_PC_SUPERIO
3169 detect_and_report_winbond ();
3170 detect_and_report_smsc ();
3171 #endif
3172
3173 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3174 count += parport_pc_init_superio (autoirq, autodma);
3175
3176 /* PnP ports, skip detection if SuperIO already found them */
3177 if (!count) {
3178 err = pnp_register_driver (&parport_pc_pnp_driver);
3179 if (!err)
3180 pnp_registered_parport = 1;
3181 }
3182
3183 /* ISA ports and whatever (see asm/parport.h). */
3184 parport_pc_find_nonpci_ports (autoirq, autodma);
3185
3186 err = pci_register_driver (&parport_pc_pci_driver);
3187 if (!err)
3188 pci_registered_parport = 1;
3189 }
3190
3191 /*
3192 * Piles of crap below pretend to be a parser for module and kernel
3193 * parameters. Say "thank you" to whoever had come up with that
3194 * syntax and keep in mind that code below is a cleaned up version.
3195 */
3196
3197 static int __initdata io[PARPORT_PC_MAX_PORTS+1] = { [0 ... PARPORT_PC_MAX_PORTS] = 0 };
3198 static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] =
3199 { [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO };
3200 static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE };
3201 static int __initdata irqval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY };
3202
3203 static int __init parport_parse_param(const char *s, int *val,
3204 int automatic, int none, int nofifo)
3205 {
3206 if (!s)
3207 return 0;
3208 if (!strncmp(s, "auto", 4))
3209 *val = automatic;
3210 else if (!strncmp(s, "none", 4))
3211 *val = none;
3212 else if (nofifo && !strncmp(s, "nofifo", 4))
3213 *val = nofifo;
3214 else {
3215 char *ep;
3216 unsigned long r = simple_strtoul(s, &ep, 0);
3217 if (ep != s)
3218 *val = r;
3219 else {
3220 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3221 return -1;
3222 }
3223 }
3224 return 0;
3225 }
3226
3227 static int __init parport_parse_irq(const char *irqstr, int *val)
3228 {
3229 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3230 PARPORT_IRQ_NONE, 0);
3231 }
3232
3233 static int __init parport_parse_dma(const char *dmastr, int *val)
3234 {
3235 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3236 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3237 }
3238
3239 #ifdef CONFIG_PCI
3240 static int __init parport_init_mode_setup(char *str)
3241 {
3242 printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3243
3244 if (!strcmp (str, "spp"))
3245 parport_init_mode=1;
3246 if (!strcmp (str, "ps2"))
3247 parport_init_mode=2;
3248 if (!strcmp (str, "epp"))
3249 parport_init_mode=3;
3250 if (!strcmp (str, "ecp"))
3251 parport_init_mode=4;
3252 if (!strcmp (str, "ecpepp"))
3253 parport_init_mode=5;
3254 return 1;
3255 }
3256 #endif
3257
3258 #ifdef MODULE
3259 static const char *irq[PARPORT_PC_MAX_PORTS];
3260 static const char *dma[PARPORT_PC_MAX_PORTS];
3261
3262 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3263 module_param_array(io, int, NULL, 0);
3264 MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3265 module_param_array(io_hi, int, NULL, 0);
3266 MODULE_PARM_DESC(irq, "IRQ line");
3267 module_param_array(irq, charp, NULL, 0);
3268 MODULE_PARM_DESC(dma, "DMA channel");
3269 module_param_array(dma, charp, NULL, 0);
3270 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3271 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3272 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3273 module_param(verbose_probing, int, 0644);
3274 #endif
3275 #ifdef CONFIG_PCI
3276 static char *init_mode;
3277 MODULE_PARM_DESC(init_mode, "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3278 module_param(init_mode, charp, 0);
3279 #endif
3280
3281 static int __init parse_parport_params(void)
3282 {
3283 unsigned int i;
3284 int val;
3285
3286 #ifdef CONFIG_PCI
3287 if (init_mode)
3288 parport_init_mode_setup(init_mode);
3289 #endif
3290
3291 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3292 if (parport_parse_irq(irq[i], &val))
3293 return 1;
3294 irqval[i] = val;
3295 if (parport_parse_dma(dma[i], &val))
3296 return 1;
3297 dmaval[i] = val;
3298 }
3299 if (!io[0]) {
3300 /* The user can make us use any IRQs or DMAs we find. */
3301 if (irq[0] && !parport_parse_irq(irq[0], &val))
3302 switch (val) {
3303 case PARPORT_IRQ_NONE:
3304 case PARPORT_IRQ_AUTO:
3305 irqval[0] = val;
3306 break;
3307 default:
3308 printk (KERN_WARNING
3309 "parport_pc: irq specified "
3310 "without base address. Use 'io=' "
3311 "to specify one\n");
3312 }
3313
3314 if (dma[0] && !parport_parse_dma(dma[0], &val))
3315 switch (val) {
3316 case PARPORT_DMA_NONE:
3317 case PARPORT_DMA_AUTO:
3318 dmaval[0] = val;
3319 break;
3320 default:
3321 printk (KERN_WARNING
3322 "parport_pc: dma specified "
3323 "without base address. Use 'io=' "
3324 "to specify one\n");
3325 }
3326 }
3327 return 0;
3328 }
3329
3330 #else
3331
3332 static int parport_setup_ptr __initdata = 0;
3333
3334 /*
3335 * Acceptable parameters:
3336 *
3337 * parport=0
3338 * parport=auto
3339 * parport=0xBASE[,IRQ[,DMA]]
3340 *
3341 * IRQ/DMA may be numeric or 'auto' or 'none'
3342 */
3343 static int __init parport_setup (char *str)
3344 {
3345 char *endptr;
3346 char *sep;
3347 int val;
3348
3349 if (!str || !*str || (*str == '0' && !*(str+1))) {
3350 /* Disable parport if "parport=0" in cmdline */
3351 io[0] = PARPORT_DISABLE;
3352 return 1;
3353 }
3354
3355 if (!strncmp (str, "auto", 4)) {
3356 irqval[0] = PARPORT_IRQ_AUTO;
3357 dmaval[0] = PARPORT_DMA_AUTO;
3358 return 1;
3359 }
3360
3361 val = simple_strtoul (str, &endptr, 0);
3362 if (endptr == str) {
3363 printk (KERN_WARNING "parport=%s not understood\n", str);
3364 return 1;
3365 }
3366
3367 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3368 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3369 return 1;
3370 }
3371
3372 io[parport_setup_ptr] = val;
3373 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3374 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3375
3376 sep = strchr(str, ',');
3377 if (sep++) {
3378 if (parport_parse_irq(sep, &val))
3379 return 1;
3380 irqval[parport_setup_ptr] = val;
3381 sep = strchr(sep, ',');
3382 if (sep++) {
3383 if (parport_parse_dma(sep, &val))
3384 return 1;
3385 dmaval[parport_setup_ptr] = val;
3386 }
3387 }
3388 parport_setup_ptr++;
3389 return 1;
3390 }
3391
3392 static int __init parse_parport_params(void)
3393 {
3394 return io[0] == PARPORT_DISABLE;
3395 }
3396
3397 __setup ("parport=", parport_setup);
3398
3399 /*
3400 * Acceptable parameters:
3401 *
3402 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3403 */
3404 #ifdef CONFIG_PCI
3405 __setup("parport_init_mode=",parport_init_mode_setup);
3406 #endif
3407 #endif
3408
3409 /* "Parser" ends here */
3410
3411 static int __init parport_pc_init(void)
3412 {
3413 int err;
3414
3415 if (parse_parport_params())
3416 return -EINVAL;
3417
3418 err = platform_driver_register(&parport_pc_platform_driver);
3419 if (err)
3420 return err;
3421
3422 if (io[0]) {
3423 int i;
3424 /* Only probe the ports we were given. */
3425 user_specified = 1;
3426 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3427 if (!io[i])
3428 break;
3429 if ((io_hi[i]) == PARPORT_IOHI_AUTO)
3430 io_hi[i] = 0x400 + io[i];
3431 parport_pc_probe_port(io[i], io_hi[i],
3432 irqval[i], dmaval[i], NULL);
3433 }
3434 } else
3435 parport_pc_find_ports (irqval[0], dmaval[0]);
3436
3437 return 0;
3438 }
3439
3440 static void __exit parport_pc_exit(void)
3441 {
3442 if (pci_registered_parport)
3443 pci_unregister_driver (&parport_pc_pci_driver);
3444 if (pnp_registered_parport)
3445 pnp_unregister_driver (&parport_pc_pnp_driver);
3446 platform_driver_unregister(&parport_pc_platform_driver);
3447
3448 while (!list_empty(&ports_list)) {
3449 struct parport_pc_private *priv;
3450 struct parport *port;
3451 priv = list_entry(ports_list.next,
3452 struct parport_pc_private, list);
3453 port = priv->port;
3454 if (port->dev && port->dev->bus == &platform_bus_type)
3455 platform_device_unregister(
3456 to_platform_device(port->dev));
3457 parport_pc_unregister_port(port);
3458 }
3459 }
3460
3461 MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3462 MODULE_DESCRIPTION("PC-style parallel port driver");
3463 MODULE_LICENSE("GPL");
3464 module_init(parport_pc_init)
3465 module_exit(parport_pc_exit)
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