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revert-mm-fix-blkdev-size-calculation-in-generic_write_checks
[linux-2.6/linux-trees-mm.git] / drivers / parport / parport_pc.c
blobe9743d3efaf682a8a5db6b07d6f841cf7dc2c05d
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 void parport_pc_init_state(struct pardevice *dev, struct parport_state *s)
276 {
277 s->u.pc.ctr = 0xc;
278 if (dev->irq_func &&
279 dev->port->irq != PARPORT_IRQ_NONE)
280 /* Set ackIntEn */
281 s->u.pc.ctr |= 0x10;
282
283 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
284 * D.Gruszka VScom */
285 }
286
287 static void parport_pc_save_state(struct parport *p, struct parport_state *s)
288 {
289 const struct parport_pc_private *priv = p->physport->private_data;
290 s->u.pc.ctr = priv->ctr;
291 if (priv->ecr)
292 s->u.pc.ecr = inb (ECONTROL (p));
293 }
294
295 static void parport_pc_restore_state(struct parport *p, struct parport_state *s)
296 {
297 struct parport_pc_private *priv = p->physport->private_data;
298 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
299 outb (c, CONTROL (p));
300 priv->ctr = c;
301 if (priv->ecr)
302 ECR_WRITE (p, s->u.pc.ecr);
303 }
304
305 #ifdef CONFIG_PARPORT_1284
306 static size_t parport_pc_epp_read_data (struct parport *port, void *buf,
307 size_t length, int flags)
308 {
309 size_t got = 0;
310
311 if (flags & PARPORT_W91284PIC) {
312 unsigned char status;
313 size_t left = length;
314
315 /* use knowledge about data lines..:
316 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
317 * pError is 1 if there are 16 bytes in the Warp's FIFO
318 */
319 status = inb (STATUS (port));
320
321 while (!(status & 0x08) && (got < length)) {
322 if ((left >= 16) && (status & 0x20) && !(status & 0x08)) {
323 /* can grab 16 bytes from warp fifo */
324 if (!((long)buf & 0x03)) {
325 insl (EPPDATA (port), buf, 4);
326 } else {
327 insb (EPPDATA (port), buf, 16);
328 }
329 buf += 16;
330 got += 16;
331 left -= 16;
332 } else {
333 /* grab single byte from the warp fifo */
334 *((char *)buf) = inb (EPPDATA (port));
335 buf++;
336 got++;
337 left--;
338 }
339 status = inb (STATUS (port));
340 if (status & 0x01) {
341 /* EPP timeout should never occur... */
342 printk (KERN_DEBUG "%s: EPP timeout occurred while talking to "
343 "w91284pic (should not have done)\n", port->name);
344 clear_epp_timeout (port);
345 }
346 }
347 return got;
348 }
349 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
350 if (!(((long)buf | length) & 0x03)) {
351 insl (EPPDATA (port), buf, (length >> 2));
352 } else {
353 insb (EPPDATA (port), buf, length);
354 }
355 if (inb (STATUS (port)) & 0x01) {
356 clear_epp_timeout (port);
357 return -EIO;
358 }
359 return length;
360 }
361 for (; got < length; got++) {
362 *((char*)buf) = inb (EPPDATA(port));
363 buf++;
364 if (inb (STATUS (port)) & 0x01) {
365 /* EPP timeout */
366 clear_epp_timeout (port);
367 break;
368 }
369 }
370
371 return got;
372 }
373
374 static size_t parport_pc_epp_write_data (struct parport *port, const void *buf,
375 size_t length, int flags)
376 {
377 size_t written = 0;
378
379 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
380 if (!(((long)buf | length) & 0x03)) {
381 outsl (EPPDATA (port), buf, (length >> 2));
382 } else {
383 outsb (EPPDATA (port), buf, length);
384 }
385 if (inb (STATUS (port)) & 0x01) {
386 clear_epp_timeout (port);
387 return -EIO;
388 }
389 return length;
390 }
391 for (; written < length; written++) {
392 outb (*((char*)buf), EPPDATA(port));
393 buf++;
394 if (inb (STATUS(port)) & 0x01) {
395 clear_epp_timeout (port);
396 break;
397 }
398 }
399
400 return written;
401 }
402
403 static size_t parport_pc_epp_read_addr (struct parport *port, void *buf,
404 size_t length, int flags)
405 {
406 size_t got = 0;
407
408 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
409 insb (EPPADDR (port), buf, length);
410 if (inb (STATUS (port)) & 0x01) {
411 clear_epp_timeout (port);
412 return -EIO;
413 }
414 return length;
415 }
416 for (; got < length; got++) {
417 *((char*)buf) = inb (EPPADDR (port));
418 buf++;
419 if (inb (STATUS (port)) & 0x01) {
420 clear_epp_timeout (port);
421 break;
422 }
423 }
424
425 return got;
426 }
427
428 static size_t parport_pc_epp_write_addr (struct parport *port,
429 const void *buf, size_t length,
430 int flags)
431 {
432 size_t written = 0;
433
434 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
435 outsb (EPPADDR (port), buf, length);
436 if (inb (STATUS (port)) & 0x01) {
437 clear_epp_timeout (port);
438 return -EIO;
439 }
440 return length;
441 }
442 for (; written < length; written++) {
443 outb (*((char*)buf), EPPADDR (port));
444 buf++;
445 if (inb (STATUS (port)) & 0x01) {
446 clear_epp_timeout (port);
447 break;
448 }
449 }
450
451 return written;
452 }
453
454 static size_t parport_pc_ecpepp_read_data (struct parport *port, void *buf,
455 size_t length, int flags)
456 {
457 size_t got;
458
459 frob_set_mode (port, ECR_EPP);
460 parport_pc_data_reverse (port);
461 parport_pc_write_control (port, 0x4);
462 got = parport_pc_epp_read_data (port, buf, length, flags);
463 frob_set_mode (port, ECR_PS2);
464
465 return got;
466 }
467
468 static size_t parport_pc_ecpepp_write_data (struct parport *port,
469 const void *buf, size_t length,
470 int flags)
471 {
472 size_t written;
473
474 frob_set_mode (port, ECR_EPP);
475 parport_pc_write_control (port, 0x4);
476 parport_pc_data_forward (port);
477 written = parport_pc_epp_write_data (port, buf, length, flags);
478 frob_set_mode (port, ECR_PS2);
479
480 return written;
481 }
482
483 static size_t parport_pc_ecpepp_read_addr (struct parport *port, void *buf,
484 size_t length, int flags)
485 {
486 size_t got;
487
488 frob_set_mode (port, ECR_EPP);
489 parport_pc_data_reverse (port);
490 parport_pc_write_control (port, 0x4);
491 got = parport_pc_epp_read_addr (port, buf, length, flags);
492 frob_set_mode (port, ECR_PS2);
493
494 return got;
495 }
496
497 static size_t parport_pc_ecpepp_write_addr (struct parport *port,
498 const void *buf, size_t length,
499 int flags)
500 {
501 size_t written;
502
503 frob_set_mode (port, ECR_EPP);
504 parport_pc_write_control (port, 0x4);
505 parport_pc_data_forward (port);
506 written = parport_pc_epp_write_addr (port, buf, length, flags);
507 frob_set_mode (port, ECR_PS2);
508
509 return written;
510 }
511 #endif /* IEEE 1284 support */
512
513 #ifdef CONFIG_PARPORT_PC_FIFO
514 static size_t parport_pc_fifo_write_block_pio (struct parport *port,
515 const void *buf, size_t length)
516 {
517 int ret = 0;
518 const unsigned char *bufp = buf;
519 size_t left = length;
520 unsigned long expire = jiffies + port->physport->cad->timeout;
521 const int fifo = FIFO (port);
522 int poll_for = 8; /* 80 usecs */
523 const struct parport_pc_private *priv = port->physport->private_data;
524 const int fifo_depth = priv->fifo_depth;
525
526 port = port->physport;
527
528 /* We don't want to be interrupted every character. */
529 parport_pc_disable_irq (port);
530 /* set nErrIntrEn and serviceIntr */
531 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
532
533 /* Forward mode. */
534 parport_pc_data_forward (port); /* Must be in PS2 mode */
535
536 while (left) {
537 unsigned char byte;
538 unsigned char ecrval = inb (ECONTROL (port));
539 int i = 0;
540
541 if (need_resched() && time_before (jiffies, expire))
542 /* Can't yield the port. */
543 schedule ();
544
545 /* Anyone else waiting for the port? */
546 if (port->waithead) {
547 printk (KERN_DEBUG "Somebody wants the port\n");
548 break;
549 }
550
551 if (ecrval & 0x02) {
552 /* FIFO is full. Wait for interrupt. */
553
554 /* Clear serviceIntr */
555 ECR_WRITE (port, ecrval & ~(1<<2));
556 false_alarm:
557 ret = parport_wait_event (port, HZ);
558 if (ret < 0) break;
559 ret = 0;
560 if (!time_before (jiffies, expire)) {
561 /* Timed out. */
562 printk (KERN_DEBUG "FIFO write timed out\n");
563 break;
564 }
565 ecrval = inb (ECONTROL (port));
566 if (!(ecrval & (1<<2))) {
567 if (need_resched() &&
568 time_before (jiffies, expire))
569 schedule ();
570
571 goto false_alarm;
572 }
573
574 continue;
575 }
576
577 /* Can't fail now. */
578 expire = jiffies + port->cad->timeout;
579
580 poll:
581 if (signal_pending (current))
582 break;
583
584 if (ecrval & 0x01) {
585 /* FIFO is empty. Blast it full. */
586 const int n = left < fifo_depth ? left : fifo_depth;
587 outsb (fifo, bufp, n);
588 bufp += n;
589 left -= n;
590
591 /* Adjust the poll time. */
592 if (i < (poll_for - 2)) poll_for--;
593 continue;
594 } else if (i++ < poll_for) {
595 udelay (10);
596 ecrval = inb (ECONTROL (port));
597 goto poll;
598 }
599
600 /* Half-full (call me an optimist) */
601 byte = *bufp++;
602 outb (byte, fifo);
603 left--;
604 }
605
606 dump_parport_state ("leave fifo_write_block_pio", port);
607 return length - left;
608 }
609
610 #ifdef HAS_DMA
611 static size_t parport_pc_fifo_write_block_dma (struct parport *port,
612 const void *buf, size_t length)
613 {
614 int ret = 0;
615 unsigned long dmaflag;
616 size_t left = length;
617 const struct parport_pc_private *priv = port->physport->private_data;
618 struct device *dev = port->physport->dev;
619 dma_addr_t dma_addr, dma_handle;
620 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
621 unsigned long start = (unsigned long) buf;
622 unsigned long end = (unsigned long) buf + length - 1;
623
624 dump_parport_state ("enter fifo_write_block_dma", port);
625 if (end < MAX_DMA_ADDRESS) {
626 /* If it would cross a 64k boundary, cap it at the end. */
627 if ((start ^ end) & ~0xffffUL)
628 maxlen = 0x10000 - (start & 0xffff);
629
630 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
631 DMA_TO_DEVICE);
632 } else {
633 /* above 16 MB we use a bounce buffer as ISA-DMA is not possible */
634 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
635 dma_addr = priv->dma_handle;
636 dma_handle = 0;
637 }
638
639 port = port->physport;
640
641 /* We don't want to be interrupted every character. */
642 parport_pc_disable_irq (port);
643 /* set nErrIntrEn and serviceIntr */
644 frob_econtrol (port, (1<<4) | (1<<2), (1<<4) | (1<<2));
645
646 /* Forward mode. */
647 parport_pc_data_forward (port); /* Must be in PS2 mode */
648
649 while (left) {
650 unsigned long expire = jiffies + port->physport->cad->timeout;
651
652 size_t count = left;
653
654 if (count > maxlen)
655 count = maxlen;
656
657 if (!dma_handle) /* bounce buffer ! */
658 memcpy(priv->dma_buf, buf, count);
659
660 dmaflag = claim_dma_lock();
661 disable_dma(port->dma);
662 clear_dma_ff(port->dma);
663 set_dma_mode(port->dma, DMA_MODE_WRITE);
664 set_dma_addr(port->dma, dma_addr);
665 set_dma_count(port->dma, count);
666
667 /* Set DMA mode */
668 frob_econtrol (port, 1<<3, 1<<3);
669
670 /* Clear serviceIntr */
671 frob_econtrol (port, 1<<2, 0);
672
673 enable_dma(port->dma);
674 release_dma_lock(dmaflag);
675
676 /* assume DMA will be successful */
677 left -= count;
678 buf += count;
679 if (dma_handle) dma_addr += count;
680
681 /* Wait for interrupt. */
682 false_alarm:
683 ret = parport_wait_event (port, HZ);
684 if (ret < 0) break;
685 ret = 0;
686 if (!time_before (jiffies, expire)) {
687 /* Timed out. */
688 printk (KERN_DEBUG "DMA write timed out\n");
689 break;
690 }
691 /* Is serviceIntr set? */
692 if (!(inb (ECONTROL (port)) & (1<<2))) {
693 cond_resched();
694
695 goto false_alarm;
696 }
697
698 dmaflag = claim_dma_lock();
699 disable_dma(port->dma);
700 clear_dma_ff(port->dma);
701 count = get_dma_residue(port->dma);
702 release_dma_lock(dmaflag);
703
704 cond_resched(); /* Can't yield the port. */
705
706 /* Anyone else waiting for the port? */
707 if (port->waithead) {
708 printk (KERN_DEBUG "Somebody wants the port\n");
709 break;
710 }
711
712 /* update for possible DMA residue ! */
713 buf -= count;
714 left += count;
715 if (dma_handle) dma_addr -= count;
716 }
717
718 /* Maybe got here through break, so adjust for DMA residue! */
719 dmaflag = claim_dma_lock();
720 disable_dma(port->dma);
721 clear_dma_ff(port->dma);
722 left += get_dma_residue(port->dma);
723 release_dma_lock(dmaflag);
724
725 /* Turn off DMA mode */
726 frob_econtrol (port, 1<<3, 0);
727
728 if (dma_handle)
729 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
730
731 dump_parport_state ("leave fifo_write_block_dma", port);
732 return length - left;
733 }
734 #endif
735
736 static inline size_t parport_pc_fifo_write_block(struct parport *port,
737 const void *buf, size_t length)
738 {
739 #ifdef HAS_DMA
740 if (port->dma != PARPORT_DMA_NONE)
741 return parport_pc_fifo_write_block_dma (port, buf, length);
742 #endif
743 return parport_pc_fifo_write_block_pio (port, buf, length);
744 }
745
746 /* Parallel Port FIFO mode (ECP chipsets) */
747 static size_t parport_pc_compat_write_block_pio (struct parport *port,
748 const void *buf, size_t length,
749 int flags)
750 {
751 size_t written;
752 int r;
753 unsigned long expire;
754 const struct parport_pc_private *priv = port->physport->private_data;
755
756 /* Special case: a timeout of zero means we cannot call schedule().
757 * Also if O_NONBLOCK is set then use the default implementation. */
758 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
759 return parport_ieee1284_write_compat (port, buf,
760 length, flags);
761
762 /* Set up parallel port FIFO mode.*/
763 parport_pc_data_forward (port); /* Must be in PS2 mode */
764 parport_pc_frob_control (port, PARPORT_CONTROL_STROBE, 0);
765 r = change_mode (port, ECR_PPF); /* Parallel port FIFO */
766 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n", port->name);
767
768 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
769
770 /* Write the data to the FIFO. */
771 written = parport_pc_fifo_write_block(port, buf, length);
772
773 /* Finish up. */
774 /* For some hardware we don't want to touch the mode until
775 * the FIFO is empty, so allow 4 seconds for each position
776 * in the fifo.
777 */
778 expire = jiffies + (priv->fifo_depth * HZ * 4);
779 do {
780 /* Wait for the FIFO to empty */
781 r = change_mode (port, ECR_PS2);
782 if (r != -EBUSY) {
783 break;
784 }
785 } while (time_before (jiffies, expire));
786 if (r == -EBUSY) {
787
788 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
789
790 /* Prevent further data transfer. */
791 frob_set_mode (port, ECR_TST);
792
793 /* Adjust for the contents of the FIFO. */
794 for (written -= priv->fifo_depth; ; written++) {
795 if (inb (ECONTROL (port)) & 0x2) {
796 /* Full up. */
797 break;
798 }
799 outb (0, FIFO (port));
800 }
801
802 /* Reset the FIFO and return to PS2 mode. */
803 frob_set_mode (port, ECR_PS2);
804 }
805
806 r = parport_wait_peripheral (port,
807 PARPORT_STATUS_BUSY,
808 PARPORT_STATUS_BUSY);
809 if (r)
810 printk (KERN_DEBUG
811 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
812 port->name, r);
813
814 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
815
816 return written;
817 }
818
819 /* ECP */
820 #ifdef CONFIG_PARPORT_1284
821 static size_t parport_pc_ecp_write_block_pio (struct parport *port,
822 const void *buf, size_t length,
823 int flags)
824 {
825 size_t written;
826 int r;
827 unsigned long expire;
828 const struct parport_pc_private *priv = port->physport->private_data;
829
830 /* Special case: a timeout of zero means we cannot call schedule().
831 * Also if O_NONBLOCK is set then use the default implementation. */
832 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
833 return parport_ieee1284_ecp_write_data (port, buf,
834 length, flags);
835
836 /* Switch to forward mode if necessary. */
837 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
838 /* Event 47: Set nInit high. */
839 parport_frob_control (port,
840 PARPORT_CONTROL_INIT
841 | PARPORT_CONTROL_AUTOFD,
842 PARPORT_CONTROL_INIT
843 | PARPORT_CONTROL_AUTOFD);
844
845 /* Event 49: PError goes high. */
846 r = parport_wait_peripheral (port,
847 PARPORT_STATUS_PAPEROUT,
848 PARPORT_STATUS_PAPEROUT);
849 if (r) {
850 printk (KERN_DEBUG "%s: PError timeout (%d) "
851 "in ecp_write_block_pio\n", port->name, r);
852 }
853 }
854
855 /* Set up ECP parallel port mode.*/
856 parport_pc_data_forward (port); /* Must be in PS2 mode */
857 parport_pc_frob_control (port,
858 PARPORT_CONTROL_STROBE |
859 PARPORT_CONTROL_AUTOFD,
860 0);
861 r = change_mode (port, ECR_ECP); /* ECP FIFO */
862 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
863 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
864
865 /* Write the data to the FIFO. */
866 written = parport_pc_fifo_write_block(port, buf, length);
867
868 /* Finish up. */
869 /* For some hardware we don't want to touch the mode until
870 * the FIFO is empty, so allow 4 seconds for each position
871 * in the fifo.
872 */
873 expire = jiffies + (priv->fifo_depth * (HZ * 4));
874 do {
875 /* Wait for the FIFO to empty */
876 r = change_mode (port, ECR_PS2);
877 if (r != -EBUSY) {
878 break;
879 }
880 } while (time_before (jiffies, expire));
881 if (r == -EBUSY) {
882
883 printk (KERN_DEBUG "%s: FIFO is stuck\n", port->name);
884
885 /* Prevent further data transfer. */
886 frob_set_mode (port, ECR_TST);
887
888 /* Adjust for the contents of the FIFO. */
889 for (written -= priv->fifo_depth; ; written++) {
890 if (inb (ECONTROL (port)) & 0x2) {
891 /* Full up. */
892 break;
893 }
894 outb (0, FIFO (port));
895 }
896
897 /* Reset the FIFO and return to PS2 mode. */
898 frob_set_mode (port, ECR_PS2);
899
900 /* Host transfer recovery. */
901 parport_pc_data_reverse (port); /* Must be in PS2 mode */
902 udelay (5);
903 parport_frob_control (port, PARPORT_CONTROL_INIT, 0);
904 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
905 if (r)
906 printk (KERN_DEBUG "%s: PE,1 timeout (%d) "
907 "in ecp_write_block_pio\n", port->name, r);
908
909 parport_frob_control (port,
910 PARPORT_CONTROL_INIT,
911 PARPORT_CONTROL_INIT);
912 r = parport_wait_peripheral (port,
913 PARPORT_STATUS_PAPEROUT,
914 PARPORT_STATUS_PAPEROUT);
915 if (r)
916 printk (KERN_DEBUG "%s: PE,2 timeout (%d) "
917 "in ecp_write_block_pio\n", port->name, r);
918 }
919
920 r = parport_wait_peripheral (port,
921 PARPORT_STATUS_BUSY,
922 PARPORT_STATUS_BUSY);
923 if(r)
924 printk (KERN_DEBUG
925 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
926 port->name, r);
927
928 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
929
930 return written;
931 }
932
933 #if 0
934 static size_t parport_pc_ecp_read_block_pio (struct parport *port,
935 void *buf, size_t length,
936 int flags)
937 {
938 size_t left = length;
939 size_t fifofull;
940 int r;
941 const int fifo = FIFO(port);
942 const struct parport_pc_private *priv = port->physport->private_data;
943 const int fifo_depth = priv->fifo_depth;
944 char *bufp = buf;
945
946 port = port->physport;
947 DPRINTK (KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n");
948 dump_parport_state ("enter fcn", port);
949
950 /* Special case: a timeout of zero means we cannot call schedule().
951 * Also if O_NONBLOCK is set then use the default implementation. */
952 if (port->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
953 return parport_ieee1284_ecp_read_data (port, buf,
954 length, flags);
955
956 if (port->ieee1284.mode == IEEE1284_MODE_ECPRLE) {
957 /* If the peripheral is allowed to send RLE compressed
958 * data, it is possible for a byte to expand to 128
959 * bytes in the FIFO. */
960 fifofull = 128;
961 } else {
962 fifofull = fifo_depth;
963 }
964
965 /* If the caller wants less than a full FIFO's worth of data,
966 * go through software emulation. Otherwise we may have to throw
967 * away data. */
968 if (length < fifofull)
969 return parport_ieee1284_ecp_read_data (port, buf,
970 length, flags);
971
972 if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE) {
973 /* change to reverse-idle phase (must be in forward-idle) */
974
975 /* Event 38: Set nAutoFd low (also make sure nStrobe is high) */
976 parport_frob_control (port,
977 PARPORT_CONTROL_AUTOFD
978 | PARPORT_CONTROL_STROBE,
979 PARPORT_CONTROL_AUTOFD);
980 parport_pc_data_reverse (port); /* Must be in PS2 mode */
981 udelay (5);
982 /* Event 39: Set nInit low to initiate bus reversal */
983 parport_frob_control (port,
984 PARPORT_CONTROL_INIT,
985 0);
986 /* Event 40: Wait for nAckReverse (PError) to go low */
987 r = parport_wait_peripheral (port, PARPORT_STATUS_PAPEROUT, 0);
988 if (r) {
989 printk (KERN_DEBUG "%s: PE timeout Event 40 (%d) "
990 "in ecp_read_block_pio\n", port->name, r);
991 return 0;
992 }
993 }
994
995 /* Set up ECP FIFO mode.*/
996 /* parport_pc_frob_control (port,
997 PARPORT_CONTROL_STROBE |
998 PARPORT_CONTROL_AUTOFD,
999 PARPORT_CONTROL_AUTOFD); */
1000 r = change_mode (port, ECR_ECP); /* ECP FIFO */
1001 if (r) printk (KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", port->name);
1002
1003 port->ieee1284.phase = IEEE1284_PH_REV_DATA;
1004
1005 /* the first byte must be collected manually */
1006 dump_parport_state ("pre 43", port);
1007 /* Event 43: Wait for nAck to go low */
1008 r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0);
1009 if (r) {
1010 /* timed out while reading -- no data */
1011 printk (KERN_DEBUG "PIO read timed out (initial byte)\n");
1012 goto out_no_data;
1013 }
1014 /* read byte */
1015 *bufp++ = inb (DATA (port));
1016 left--;
1017 dump_parport_state ("43-44", port);
1018 /* Event 44: nAutoFd (HostAck) goes high to acknowledge */
1019 parport_pc_frob_control (port,
1020 PARPORT_CONTROL_AUTOFD,
1021 0);
1022 dump_parport_state ("pre 45", port);
1023 /* Event 45: Wait for nAck to go high */
1024 /* r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, PARPORT_STATUS_ACK); */
1025 dump_parport_state ("post 45", port);
1026 r = 0;
1027 if (r) {
1028 /* timed out while waiting for peripheral to respond to ack */
1029 printk (KERN_DEBUG "ECP PIO read timed out (waiting for nAck)\n");
1030
1031 /* keep hold of the byte we've got already */
1032 goto out_no_data;
1033 }
1034 /* Event 46: nAutoFd (HostAck) goes low to accept more data */
1035 parport_pc_frob_control (port,
1036 PARPORT_CONTROL_AUTOFD,
1037 PARPORT_CONTROL_AUTOFD);
1038
1039
1040 dump_parport_state ("rev idle", port);
1041 /* Do the transfer. */
1042 while (left > fifofull) {
1043 int ret;
1044 unsigned long expire = jiffies + port->cad->timeout;
1045 unsigned char ecrval = inb (ECONTROL (port));
1046
1047 if (need_resched() && time_before (jiffies, expire))
1048 /* Can't yield the port. */
1049 schedule ();
1050
1051 /* At this point, the FIFO may already be full. In
1052 * that case ECP is already holding back the
1053 * peripheral (assuming proper design) with a delayed
1054 * handshake. Work fast to avoid a peripheral
1055 * timeout. */
1056
1057 if (ecrval & 0x01) {
1058 /* FIFO is empty. Wait for interrupt. */
1059 dump_parport_state ("FIFO empty", port);
1060
1061 /* Anyone else waiting for the port? */
1062 if (port->waithead) {
1063 printk (KERN_DEBUG "Somebody wants the port\n");
1064 break;
1065 }
1066
1067 /* Clear serviceIntr */
1068 ECR_WRITE (port, ecrval & ~(1<<2));
1069 false_alarm:
1070 dump_parport_state ("waiting", port);
1071 ret = parport_wait_event (port, HZ);
1072 DPRINTK (KERN_DEBUG "parport_wait_event returned %d\n", ret);
1073 if (ret < 0)
1074 break;
1075 ret = 0;
1076 if (!time_before (jiffies, expire)) {
1077 /* Timed out. */
1078 dump_parport_state ("timeout", port);
1079 printk (KERN_DEBUG "PIO read timed out\n");
1080 break;
1081 }
1082 ecrval = inb (ECONTROL (port));
1083 if (!(ecrval & (1<<2))) {
1084 if (need_resched() &&
1085 time_before (jiffies, expire)) {
1086 schedule ();
1087 }
1088 goto false_alarm;
1089 }
1090
1091 /* Depending on how the FIFO threshold was
1092 * set, how long interrupt service took, and
1093 * how fast the peripheral is, we might be
1094 * lucky and have a just filled FIFO. */
1095 continue;
1096 }
1097
1098 if (ecrval & 0x02) {
1099 /* FIFO is full. */
1100 dump_parport_state ("FIFO full", port);
1101 insb (fifo, bufp, fifo_depth);
1102 bufp += fifo_depth;
1103 left -= fifo_depth;
1104 continue;
1105 }
1106
1107 DPRINTK (KERN_DEBUG "*** ecp_read_block_pio: reading one byte from the FIFO\n");
1108
1109 /* FIFO not filled. We will cycle this loop for a while
1110 * and either the peripheral will fill it faster,
1111 * tripping a fast empty with insb, or we empty it. */
1112 *bufp++ = inb (fifo);
1113 left--;
1114 }
1115
1116 /* scoop up anything left in the FIFO */
1117 while (left && !(inb (ECONTROL (port) & 0x01))) {
1118 *bufp++ = inb (fifo);
1119 left--;
1120 }
1121
1122 port->ieee1284.phase = IEEE1284_PH_REV_IDLE;
1123 dump_parport_state ("rev idle2", port);
1124
1125 out_no_data:
1126
1127 /* Go to forward idle mode to shut the peripheral up (event 47). */
1128 parport_frob_control (port, PARPORT_CONTROL_INIT, PARPORT_CONTROL_INIT);
1129
1130 /* event 49: PError goes high */
1131 r = parport_wait_peripheral (port,
1132 PARPORT_STATUS_PAPEROUT,
1133 PARPORT_STATUS_PAPEROUT);
1134 if (r) {
1135 printk (KERN_DEBUG
1136 "%s: PE timeout FWDIDLE (%d) in ecp_read_block_pio\n",
1137 port->name, r);
1138 }
1139
1140 port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
1141
1142 /* Finish up. */
1143 {
1144 int lost = get_fifo_residue (port);
1145 if (lost)
1146 /* Shouldn't happen with compliant peripherals. */
1147 printk (KERN_DEBUG "%s: DATA LOSS (%d bytes)!\n",
1148 port->name, lost);
1149 }
1150
1151 dump_parport_state ("fwd idle", port);
1152 return length - left;
1153 }
1154 #endif /* 0 */
1155 #endif /* IEEE 1284 support */
1156 #endif /* Allowed to use FIFO/DMA */
1157
1158
1159 /*
1160 * ******************************************
1161 * INITIALISATION AND MODULE STUFF BELOW HERE
1162 * ******************************************
1163 */
1164
1165 /* GCC is not inlining extern inline function later overwriten to non-inline,
1166 so we use outlined_ variants here. */
1167 static const struct parport_operations parport_pc_ops =
1168 {
1169 .write_data = parport_pc_write_data,
1170 .read_data = parport_pc_read_data,
1171
1172 .write_control = parport_pc_write_control,
1173 .read_control = parport_pc_read_control,
1174 .frob_control = parport_pc_frob_control,
1175
1176 .read_status = parport_pc_read_status,
1177
1178 .enable_irq = parport_pc_enable_irq,
1179 .disable_irq = parport_pc_disable_irq,
1180
1181 .data_forward = parport_pc_data_forward,
1182 .data_reverse = parport_pc_data_reverse,
1183
1184 .init_state = parport_pc_init_state,
1185 .save_state = parport_pc_save_state,
1186 .restore_state = parport_pc_restore_state,
1187
1188 .epp_write_data = parport_ieee1284_epp_write_data,
1189 .epp_read_data = parport_ieee1284_epp_read_data,
1190 .epp_write_addr = parport_ieee1284_epp_write_addr,
1191 .epp_read_addr = parport_ieee1284_epp_read_addr,
1192
1193 .ecp_write_data = parport_ieee1284_ecp_write_data,
1194 .ecp_read_data = parport_ieee1284_ecp_read_data,
1195 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
1196
1197 .compat_write_data = parport_ieee1284_write_compat,
1198 .nibble_read_data = parport_ieee1284_read_nibble,
1199 .byte_read_data = parport_ieee1284_read_byte,
1200
1201 .owner = THIS_MODULE,
1202 };
1203
1204 #ifdef CONFIG_PARPORT_PC_SUPERIO
1205 /* Super-IO chipset detection, Winbond, SMSC */
1206 static void __devinit show_parconfig_smsc37c669(int io, int key)
1207 {
1208 int cr1,cr4,cra,cr23,cr26,cr27,i=0;
1209 static const char *const modes[]={
1210 "SPP and Bidirectional (PS/2)",
1211 "EPP and SPP",
1212 "ECP",
1213 "ECP and EPP" };
1214
1215 outb(key,io);
1216 outb(key,io);
1217 outb(1,io);
1218 cr1=inb(io+1);
1219 outb(4,io);
1220 cr4=inb(io+1);
1221 outb(0x0a,io);
1222 cra=inb(io+1);
1223 outb(0x23,io);
1224 cr23=inb(io+1);
1225 outb(0x26,io);
1226 cr26=inb(io+1);
1227 outb(0x27,io);
1228 cr27=inb(io+1);
1229 outb(0xaa,io);
1230
1231 if (verbose_probing) {
1232 printk (KERN_INFO "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
1233 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
1234 cr1,cr4,cra,cr23,cr26,cr27);
1235
1236 /* The documentation calls DMA and IRQ-Lines by letters, so
1237 the board maker can/will wire them
1238 appropriately/randomly... G=reserved H=IDE-irq, */
1239 printk (KERN_INFO "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, "
1240 "fifo threshold=%d\n", cr23*4,
1241 (cr27 &0x0f) ? 'A'-1+(cr27 &0x0f): '-',
1242 (cr26 &0x0f) ? 'A'-1+(cr26 &0x0f): '-', cra & 0x0f);
1243 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
1244 (cr23*4 >=0x100) ?"yes":"no", (cr1 & 4) ? "yes" : "no");
1245 printk(KERN_INFO "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1246 (cr1 & 0x08 ) ? "Standard mode only (SPP)" : modes[cr4 & 0x03],
1247 (cr4 & 0x40) ? "1.7" : "1.9");
1248 }
1249
1250 /* Heuristics ! BIOS setup for this mainboard device limits
1251 the choices to standard settings, i.e. io-address and IRQ
1252 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1253 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1254 if(cr23*4 >=0x100) { /* if active */
1255 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1256 i++;
1257 if(i==NR_SUPERIOS)
1258 printk(KERN_INFO "Super-IO: too many chips!\n");
1259 else {
1260 int d;
1261 switch (cr23*4) {
1262 case 0x3bc:
1263 superios[i].io = 0x3bc;
1264 superios[i].irq = 7;
1265 break;
1266 case 0x378:
1267 superios[i].io = 0x378;
1268 superios[i].irq = 7;
1269 break;
1270 case 0x278:
1271 superios[i].io = 0x278;
1272 superios[i].irq = 5;
1273 }
1274 d=(cr26 &0x0f);
1275 if((d==1) || (d==3))
1276 superios[i].dma= d;
1277 else
1278 superios[i].dma= PARPORT_DMA_NONE;
1279 }
1280 }
1281 }
1282
1283
1284 static void __devinit show_parconfig_winbond(int io, int key)
1285 {
1286 int cr30,cr60,cr61,cr70,cr74,crf0,i=0;
1287 static const char *const modes[] = {
1288 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1289 "EPP-1.9 and SPP",
1290 "ECP",
1291 "ECP and EPP-1.9",
1292 "Standard (SPP)",
1293 "EPP-1.7 and SPP", /* 5 */
1294 "undefined!",
1295 "ECP and EPP-1.7" };
1296 static char *const irqtypes[] = {
1297 "pulsed low, high-Z",
1298 "follows nACK" };
1299
1300 /* The registers are called compatible-PnP because the
1301 register layout is modelled after ISA-PnP, the access
1302 method is just another ... */
1303 outb(key,io);
1304 outb(key,io);
1305 outb(0x07,io); /* Register 7: Select Logical Device */
1306 outb(0x01,io+1); /* LD1 is Parallel Port */
1307 outb(0x30,io);
1308 cr30=inb(io+1);
1309 outb(0x60,io);
1310 cr60=inb(io+1);
1311 outb(0x61,io);
1312 cr61=inb(io+1);
1313 outb(0x70,io);
1314 cr70=inb(io+1);
1315 outb(0x74,io);
1316 cr74=inb(io+1);
1317 outb(0xf0,io);
1318 crf0=inb(io+1);
1319 outb(0xaa,io);
1320
1321 if (verbose_probing) {
1322 printk(KERN_INFO "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x "
1323 "70=%02x 74=%02x, f0=%02x\n", cr30,cr60,cr61,cr70,cr74,crf0);
1324 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1325 (cr30 & 0x01) ? "yes":"no", cr60,cr61,cr70&0x0f );
1326 if ((cr74 & 0x07) > 3)
1327 printk("dma=none\n");
1328 else
1329 printk("dma=%d\n",cr74 & 0x07);
1330 printk(KERN_INFO "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1331 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1332 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n", modes[crf0 & 0x07]);
1333 }
1334
1335 if(cr30 & 0x01) { /* the settings can be interrogated later ... */
1336 while((superios[i].io!= 0) && (i<NR_SUPERIOS))
1337 i++;
1338 if(i==NR_SUPERIOS)
1339 printk(KERN_INFO "Super-IO: too many chips!\n");
1340 else {
1341 superios[i].io = (cr60<<8)|cr61;
1342 superios[i].irq = cr70&0x0f;
1343 superios[i].dma = (((cr74 & 0x07) > 3) ?
1344 PARPORT_DMA_NONE : (cr74 & 0x07));
1345 }
1346 }
1347 }
1348
1349 static void __devinit decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1350 {
1351 const char *type = "unknown";
1352 int id,progif=2;
1353
1354 if (devid == devrev)
1355 /* simple heuristics, we happened to read some
1356 non-winbond register */
1357 return;
1358
1359 id=(devid<<8) | devrev;
1360
1361 /* Values are from public data sheets pdf files, I can just
1362 confirm 83977TF is correct :-) */
1363 if (id == 0x9771) type="83977F/AF";
1364 else if (id == 0x9773) type="83977TF / SMSC 97w33x/97w34x";
1365 else if (id == 0x9774) type="83977ATF";
1366 else if ((id & ~0x0f) == 0x5270) type="83977CTF / SMSC 97w36x";
1367 else if ((id & ~0x0f) == 0x52f0) type="83977EF / SMSC 97w35x";
1368 else if ((id & ~0x0f) == 0x5210) type="83627";
1369 else if ((id & ~0x0f) == 0x6010) type="83697HF";
1370 else if ((oldid &0x0f ) == 0x0a) { type="83877F"; progif=1;}
1371 else if ((oldid &0x0f ) == 0x0b) { type="83877AF"; progif=1;}
1372 else if ((oldid &0x0f ) == 0x0c) { type="83877TF"; progif=1;}
1373 else if ((oldid &0x0f ) == 0x0d) { type="83877ATF"; progif=1;}
1374 else progif=0;
1375
1376 if (verbose_probing)
1377 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1378 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1379 efer, key, devid, devrev, oldid, type);
1380
1381 if (progif == 2)
1382 show_parconfig_winbond(efer,key);
1383 }
1384
1385 static void __devinit decode_smsc(int efer, int key, int devid, int devrev)
1386 {
1387 const char *type = "unknown";
1388 void (*func)(int io, int key);
1389 int id;
1390
1391 if (devid == devrev)
1392 /* simple heuristics, we happened to read some
1393 non-smsc register */
1394 return;
1395
1396 func=NULL;
1397 id=(devid<<8) | devrev;
1398
1399 if (id==0x0302) {type="37c669"; func=show_parconfig_smsc37c669;}
1400 else if (id==0x6582) type="37c665IR";
1401 else if (devid==0x65) type="37c665GT";
1402 else if (devid==0x66) type="37c666GT";
1403
1404 if (verbose_probing)
1405 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1406 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1407 efer, key, devid, devrev, type);
1408
1409 if (func)
1410 func(efer,key);
1411 }
1412
1413
1414 static void __devinit winbond_check(int io, int key)
1415 {
1416 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1417
1418 if (!request_region(io, 3, __FUNCTION__))
1419 return;
1420
1421 /* First probe without key */
1422 outb(0x20,io);
1423 x_devid=inb(io+1);
1424 outb(0x21,io);
1425 x_devrev=inb(io+1);
1426 outb(0x09,io);
1427 x_oldid=inb(io+1);
1428
1429 outb(key,io);
1430 outb(key,io); /* Write Magic Sequence to EFER, extended
1431 funtion enable register */
1432 outb(0x20,io); /* Write EFIR, extended function index register */
1433 devid=inb(io+1); /* Read EFDR, extended function data register */
1434 outb(0x21,io);
1435 devrev=inb(io+1);
1436 outb(0x09,io);
1437 oldid=inb(io+1);
1438 outb(0xaa,io); /* Magic Seal */
1439
1440 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1441 goto out; /* protection against false positives */
1442
1443 decode_winbond(io,key,devid,devrev,oldid);
1444 out:
1445 release_region(io, 3);
1446 }
1447
1448 static void __devinit winbond_check2(int io,int key)
1449 {
1450 int devid,devrev,oldid,x_devid,x_devrev,x_oldid;
1451
1452 if (!request_region(io, 3, __FUNCTION__))
1453 return;
1454
1455 /* First probe without the key */
1456 outb(0x20,io+2);
1457 x_devid=inb(io+2);
1458 outb(0x21,io+1);
1459 x_devrev=inb(io+2);
1460 outb(0x09,io+1);
1461 x_oldid=inb(io+2);
1462
1463 outb(key,io); /* Write Magic Byte to EFER, extended
1464 funtion enable register */
1465 outb(0x20,io+2); /* Write EFIR, extended function index register */
1466 devid=inb(io+2); /* Read EFDR, extended function data register */
1467 outb(0x21,io+1);
1468 devrev=inb(io+2);
1469 outb(0x09,io+1);
1470 oldid=inb(io+2);
1471 outb(0xaa,io); /* Magic Seal */
1472
1473 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1474 goto out; /* protection against false positives */
1475
1476 decode_winbond(io,key,devid,devrev,oldid);
1477 out:
1478 release_region(io, 3);
1479 }
1480
1481 static void __devinit smsc_check(int io, int key)
1482 {
1483 int id,rev,oldid,oldrev,x_id,x_rev,x_oldid,x_oldrev;
1484
1485 if (!request_region(io, 3, __FUNCTION__))
1486 return;
1487
1488 /* First probe without the key */
1489 outb(0x0d,io);
1490 x_oldid=inb(io+1);
1491 outb(0x0e,io);
1492 x_oldrev=inb(io+1);
1493 outb(0x20,io);
1494 x_id=inb(io+1);
1495 outb(0x21,io);
1496 x_rev=inb(io+1);
1497
1498 outb(key,io);
1499 outb(key,io); /* Write Magic Sequence to EFER, extended
1500 funtion enable register */
1501 outb(0x0d,io); /* Write EFIR, extended function index register */
1502 oldid=inb(io+1); /* Read EFDR, extended function data register */
1503 outb(0x0e,io);
1504 oldrev=inb(io+1);
1505 outb(0x20,io);
1506 id=inb(io+1);
1507 outb(0x21,io);
1508 rev=inb(io+1);
1509 outb(0xaa,io); /* Magic Seal */
1510
1511 if ((x_id == id) && (x_oldrev == oldrev) &&
1512 (x_oldid == oldid) && (x_rev == rev))
1513 goto out; /* protection against false positives */
1514
1515 decode_smsc(io,key,oldid,oldrev);
1516 out:
1517 release_region(io, 3);
1518 }
1519
1520
1521 static void __devinit detect_and_report_winbond (void)
1522 {
1523 if (verbose_probing)
1524 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1525 winbond_check(0x3f0,0x87);
1526 winbond_check(0x370,0x87);
1527 winbond_check(0x2e ,0x87);
1528 winbond_check(0x4e ,0x87);
1529 winbond_check(0x3f0,0x86);
1530 winbond_check2(0x250,0x88);
1531 winbond_check2(0x250,0x89);
1532 }
1533
1534 static void __devinit detect_and_report_smsc (void)
1535 {
1536 if (verbose_probing)
1537 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1538 smsc_check(0x3f0,0x55);
1539 smsc_check(0x370,0x55);
1540 smsc_check(0x3f0,0x44);
1541 smsc_check(0x370,0x44);
1542 }
1543 #endif /* CONFIG_PARPORT_PC_SUPERIO */
1544
1545 static int get_superio_dma (struct parport *p)
1546 {
1547 int i=0;
1548 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1549 i++;
1550 if (i!=NR_SUPERIOS)
1551 return superios[i].dma;
1552 return PARPORT_DMA_NONE;
1553 }
1554
1555 static int get_superio_irq (struct parport *p)
1556 {
1557 int i=0;
1558 while( (superios[i].io != p->base) && (i<NR_SUPERIOS))
1559 i++;
1560 if (i!=NR_SUPERIOS)
1561 return superios[i].irq;
1562 return PARPORT_IRQ_NONE;
1563 }
1564
1565
1566 /* --- Mode detection ------------------------------------- */
1567
1568 /*
1569 * Checks for port existence, all ports support SPP MODE
1570 * Returns:
1571 * 0 : No parallel port at this address
1572 * PARPORT_MODE_PCSPP : SPP port detected
1573 * (if the user specified an ioport himself,
1574 * this shall always be the case!)
1575 *
1576 */
1577 static int parport_SPP_supported(struct parport *pb)
1578 {
1579 unsigned char r, w;
1580
1581 /*
1582 * first clear an eventually pending EPP timeout
1583 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1584 * that does not even respond to SPP cycles if an EPP
1585 * timeout is pending
1586 */
1587 clear_epp_timeout(pb);
1588
1589 /* Do a simple read-write test to make sure the port exists. */
1590 w = 0xc;
1591 outb (w, CONTROL (pb));
1592
1593 /* Is there a control register that we can read from? Some
1594 * ports don't allow reads, so read_control just returns a
1595 * software copy. Some ports _do_ allow reads, so bypass the
1596 * software copy here. In addition, some bits aren't
1597 * writable. */
1598 r = inb (CONTROL (pb));
1599 if ((r & 0xf) == w) {
1600 w = 0xe;
1601 outb (w, CONTROL (pb));
1602 r = inb (CONTROL (pb));
1603 outb (0xc, CONTROL (pb));
1604 if ((r & 0xf) == w)
1605 return PARPORT_MODE_PCSPP;
1606 }
1607
1608 if (user_specified)
1609 /* That didn't work, but the user thinks there's a
1610 * port here. */
1611 printk (KERN_INFO "parport 0x%lx (WARNING): CTR: "
1612 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1613
1614 /* Try the data register. The data lines aren't tri-stated at
1615 * this stage, so we expect back what we wrote. */
1616 w = 0xaa;
1617 parport_pc_write_data (pb, w);
1618 r = parport_pc_read_data (pb);
1619 if (r == w) {
1620 w = 0x55;
1621 parport_pc_write_data (pb, w);
1622 r = parport_pc_read_data (pb);
1623 if (r == w)
1624 return PARPORT_MODE_PCSPP;
1625 }
1626
1627 if (user_specified) {
1628 /* Didn't work, but the user is convinced this is the
1629 * place. */
1630 printk (KERN_INFO "parport 0x%lx (WARNING): DATA: "
1631 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1632 printk (KERN_INFO "parport 0x%lx: You gave this address, "
1633 "but there is probably no parallel port there!\n",
1634 pb->base);
1635 }
1636
1637 /* It's possible that we can't read the control register or
1638 * the data register. In that case just believe the user. */
1639 if (user_specified)
1640 return PARPORT_MODE_PCSPP;
1641
1642 return 0;
1643 }
1644
1645 /* Check for ECR
1646 *
1647 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1648 * on these cards actually accesses the CTR.
1649 *
1650 * Modern cards don't do this but reading from ECR will return 0xff
1651 * regardless of what is written here if the card does NOT support
1652 * ECP.
1653 *
1654 * We first check to see if ECR is the same as CTR. If not, the low
1655 * two bits of ECR aren't writable, so we check by writing ECR and
1656 * reading it back to see if it's what we expect.
1657 */
1658 static int parport_ECR_present(struct parport *pb)
1659 {
1660 struct parport_pc_private *priv = pb->private_data;
1661 unsigned char r = 0xc;
1662
1663 outb (r, CONTROL (pb));
1664 if ((inb (ECONTROL (pb)) & 0x3) == (r & 0x3)) {
1665 outb (r ^ 0x2, CONTROL (pb)); /* Toggle bit 1 */
1666
1667 r = inb (CONTROL (pb));
1668 if ((inb (ECONTROL (pb)) & 0x2) == (r & 0x2))
1669 goto no_reg; /* Sure that no ECR register exists */
1670 }
1671
1672 if ((inb (ECONTROL (pb)) & 0x3 ) != 0x1)
1673 goto no_reg;
1674
1675 ECR_WRITE (pb, 0x34);
1676 if (inb (ECONTROL (pb)) != 0x35)
1677 goto no_reg;
1678
1679 priv->ecr = 1;
1680 outb (0xc, CONTROL (pb));
1681
1682 /* Go to mode 000 */
1683 frob_set_mode (pb, ECR_SPP);
1684
1685 return 1;
1686
1687 no_reg:
1688 outb (0xc, CONTROL (pb));
1689 return 0;
1690 }
1691
1692 #ifdef CONFIG_PARPORT_1284
1693 /* Detect PS/2 support.
1694 *
1695 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1696 * allows us to read data from the data lines. In theory we would get back
1697 * 0xff but any peripheral attached to the port may drag some or all of the
1698 * lines down to zero. So if we get back anything that isn't the contents
1699 * of the data register we deem PS/2 support to be present.
1700 *
1701 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1702 * drivers, but an external peripheral with sufficiently beefy drivers of
1703 * its own can overpower them and assert its own levels onto the bus, from
1704 * where they can then be read back as normal. Ports with this property
1705 * and the right type of device attached are likely to fail the SPP test,
1706 * (as they will appear to have stuck bits) and so the fact that they might
1707 * be misdetected here is rather academic.
1708 */
1709
1710 static int parport_PS2_supported(struct parport *pb)
1711 {
1712 int ok = 0;
1713
1714 clear_epp_timeout(pb);
1715
1716 /* try to tri-state the buffer */
1717 parport_pc_data_reverse (pb);
1718
1719 parport_pc_write_data(pb, 0x55);
1720 if (parport_pc_read_data(pb) != 0x55) ok++;
1721
1722 parport_pc_write_data(pb, 0xaa);
1723 if (parport_pc_read_data(pb) != 0xaa) ok++;
1724
1725 /* cancel input mode */
1726 parport_pc_data_forward (pb);
1727
1728 if (ok) {
1729 pb->modes |= PARPORT_MODE_TRISTATE;
1730 } else {
1731 struct parport_pc_private *priv = pb->private_data;
1732 priv->ctr_writable &= ~0x20;
1733 }
1734
1735 return ok;
1736 }
1737
1738 #ifdef CONFIG_PARPORT_PC_FIFO
1739 static int __devinit parport_ECP_supported(struct parport *pb)
1740 {
1741 int i;
1742 int config, configb;
1743 int pword;
1744 struct parport_pc_private *priv = pb->private_data;
1745 /* Translate ECP intrLine to ISA irq value */
1746 static const int intrline[]= { 0, 7, 9, 10, 11, 14, 15, 5 };
1747
1748 /* If there is no ECR, we have no hope of supporting ECP. */
1749 if (!priv->ecr)
1750 return 0;
1751
1752 /* Find out FIFO depth */
1753 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1754 ECR_WRITE (pb, ECR_TST << 5); /* TEST FIFO */
1755 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02); i++)
1756 outb (0xaa, FIFO (pb));
1757
1758 /*
1759 * Using LGS chipset it uses ECR register, but
1760 * it doesn't support ECP or FIFO MODE
1761 */
1762 if (i == 1024) {
1763 ECR_WRITE (pb, ECR_SPP << 5);
1764 return 0;
1765 }
1766
1767 priv->fifo_depth = i;
1768 if (verbose_probing)
1769 printk (KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1770
1771 /* Find out writeIntrThreshold */
1772 frob_econtrol (pb, 1<<2, 1<<2);
1773 frob_econtrol (pb, 1<<2, 0);
1774 for (i = 1; i <= priv->fifo_depth; i++) {
1775 inb (FIFO (pb));
1776 udelay (50);
1777 if (inb (ECONTROL (pb)) & (1<<2))
1778 break;
1779 }
1780
1781 if (i <= priv->fifo_depth) {
1782 if (verbose_probing)
1783 printk (KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1784 pb->base, i);
1785 } else
1786 /* Number of bytes we know we can write if we get an
1787 interrupt. */
1788 i = 0;
1789
1790 priv->writeIntrThreshold = i;
1791
1792 /* Find out readIntrThreshold */
1793 frob_set_mode (pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1794 parport_pc_data_reverse (pb); /* Must be in PS2 mode */
1795 frob_set_mode (pb, ECR_TST); /* Test FIFO */
1796 frob_econtrol (pb, 1<<2, 1<<2);
1797 frob_econtrol (pb, 1<<2, 0);
1798 for (i = 1; i <= priv->fifo_depth; i++) {
1799 outb (0xaa, FIFO (pb));
1800 if (inb (ECONTROL (pb)) & (1<<2))
1801 break;
1802 }
1803
1804 if (i <= priv->fifo_depth) {
1805 if (verbose_probing)
1806 printk (KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1807 pb->base, i);
1808 } else
1809 /* Number of bytes we can read if we get an interrupt. */
1810 i = 0;
1811
1812 priv->readIntrThreshold = i;
1813
1814 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1815 ECR_WRITE (pb, 0xf4); /* Configuration mode */
1816 config = inb (CONFIGA (pb));
1817 pword = (config >> 4) & 0x7;
1818 switch (pword) {
1819 case 0:
1820 pword = 2;
1821 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1822 pb->base);
1823 break;
1824 case 2:
1825 pword = 4;
1826 printk (KERN_WARNING "0x%lx: Unsupported pword size!\n",
1827 pb->base);
1828 break;
1829 default:
1830 printk (KERN_WARNING "0x%lx: Unknown implementation ID\n",
1831 pb->base);
1832 /* Assume 1 */
1833 case 1:
1834 pword = 1;
1835 }
1836 priv->pword = pword;
1837
1838 if (verbose_probing) {
1839 printk (KERN_DEBUG "0x%lx: PWord is %d bits\n", pb->base, 8 * pword);
1840
1841 printk (KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1842 config & 0x80 ? "Level" : "Pulses");
1843
1844 configb = inb (CONFIGB (pb));
1845 printk (KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1846 pb->base, config, configb);
1847 printk (KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1848 if ((configb >>3) & 0x07)
1849 printk("%d",intrline[(configb >>3) & 0x07]);
1850 else
1851 printk("<none or set by other means>");
1852 printk (" dma=");
1853 if( (configb & 0x03 ) == 0x00)
1854 printk("<none or set by other means>\n");
1855 else
1856 printk("%d\n",configb & 0x07);
1857 }
1858
1859 /* Go back to mode 000 */
1860 frob_set_mode (pb, ECR_SPP);
1861
1862 return 1;
1863 }
1864 #endif
1865
1866 static int parport_ECPPS2_supported(struct parport *pb)
1867 {
1868 const struct parport_pc_private *priv = pb->private_data;
1869 int result;
1870 unsigned char oecr;
1871
1872 if (!priv->ecr)
1873 return 0;
1874
1875 oecr = inb (ECONTROL (pb));
1876 ECR_WRITE (pb, ECR_PS2 << 5);
1877 result = parport_PS2_supported(pb);
1878 ECR_WRITE (pb, oecr);
1879 return result;
1880 }
1881
1882 /* EPP mode detection */
1883
1884 static int parport_EPP_supported(struct parport *pb)
1885 {
1886 const struct parport_pc_private *priv = pb->private_data;
1887
1888 /*
1889 * Theory:
1890 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1891 * when EPP is possible and is set high when an EPP timeout
1892 * occurs (EPP uses the HALT line to stop the CPU while it does
1893 * the byte transfer, an EPP timeout occurs if the attached
1894 * device fails to respond after 10 micro seconds).
1895 *
1896 * This bit is cleared by either reading it (National Semi)
1897 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1898 * This bit is always high in non EPP modes.
1899 */
1900
1901 /* If EPP timeout bit clear then EPP available */
1902 if (!clear_epp_timeout(pb)) {
1903 return 0; /* No way to clear timeout */
1904 }
1905
1906 /* Check for Intel bug. */
1907 if (priv->ecr) {
1908 unsigned char i;
1909 for (i = 0x00; i < 0x80; i += 0x20) {
1910 ECR_WRITE (pb, i);
1911 if (clear_epp_timeout (pb)) {
1912 /* Phony EPP in ECP. */
1913 return 0;
1914 }
1915 }
1916 }
1917
1918 pb->modes |= PARPORT_MODE_EPP;
1919
1920 /* Set up access functions to use EPP hardware. */
1921 pb->ops->epp_read_data = parport_pc_epp_read_data;
1922 pb->ops->epp_write_data = parport_pc_epp_write_data;
1923 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1924 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1925
1926 return 1;
1927 }
1928
1929 static int parport_ECPEPP_supported(struct parport *pb)
1930 {
1931 struct parport_pc_private *priv = pb->private_data;
1932 int result;
1933 unsigned char oecr;
1934
1935 if (!priv->ecr) {
1936 return 0;
1937 }
1938
1939 oecr = inb (ECONTROL (pb));
1940 /* Search for SMC style EPP+ECP mode */
1941 ECR_WRITE (pb, 0x80);
1942 outb (0x04, CONTROL (pb));
1943 result = parport_EPP_supported(pb);
1944
1945 ECR_WRITE (pb, oecr);
1946
1947 if (result) {
1948 /* Set up access functions to use ECP+EPP hardware. */
1949 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1950 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1951 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1952 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1953 }
1954
1955 return result;
1956 }
1957
1958 #else /* No IEEE 1284 support */
1959
1960 /* Don't bother probing for modes we know we won't use. */
1961 static int __devinit parport_PS2_supported(struct parport *pb) { return 0; }
1962 #ifdef CONFIG_PARPORT_PC_FIFO
1963 static int __devinit parport_ECP_supported(struct parport *pb) { return 0; }
1964 #endif
1965 static int __devinit parport_EPP_supported(struct parport *pb) { return 0; }
1966 static int __devinit parport_ECPEPP_supported(struct parport *pb){return 0;}
1967 static int __devinit parport_ECPPS2_supported(struct parport *pb){return 0;}
1968
1969 #endif /* No IEEE 1284 support */
1970
1971 /* --- IRQ detection -------------------------------------- */
1972
1973 /* Only if supports ECP mode */
1974 static int programmable_irq_support(struct parport *pb)
1975 {
1976 int irq, intrLine;
1977 unsigned char oecr = inb (ECONTROL (pb));
1978 static const int lookup[8] = {
1979 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1980 };
1981
1982 ECR_WRITE (pb, ECR_CNF << 5); /* Configuration MODE */
1983
1984 intrLine = (inb (CONFIGB (pb)) >> 3) & 0x07;
1985 irq = lookup[intrLine];
1986
1987 ECR_WRITE (pb, oecr);
1988 return irq;
1989 }
1990
1991 static int irq_probe_ECP(struct parport *pb)
1992 {
1993 int i;
1994 unsigned long irqs;
1995
1996 irqs = probe_irq_on();
1997
1998 ECR_WRITE (pb, ECR_SPP << 5); /* Reset FIFO */
1999 ECR_WRITE (pb, (ECR_TST << 5) | 0x04);
2000 ECR_WRITE (pb, ECR_TST << 5);
2001
2002 /* If Full FIFO sure that writeIntrThreshold is generated */
2003 for (i=0; i < 1024 && !(inb (ECONTROL (pb)) & 0x02) ; i++)
2004 outb (0xaa, FIFO (pb));
2005
2006 pb->irq = probe_irq_off(irqs);
2007 ECR_WRITE (pb, ECR_SPP << 5);
2008
2009 if (pb->irq <= 0)
2010 pb->irq = PARPORT_IRQ_NONE;
2011
2012 return pb->irq;
2013 }
2014
2015 /*
2016 * This detection seems that only works in National Semiconductors
2017 * This doesn't work in SMC, LGS, and Winbond
2018 */
2019 static int irq_probe_EPP(struct parport *pb)
2020 {
2021 #ifndef ADVANCED_DETECT
2022 return PARPORT_IRQ_NONE;
2023 #else
2024 int irqs;
2025 unsigned char oecr;
2026
2027 if (pb->modes & PARPORT_MODE_PCECR)
2028 oecr = inb (ECONTROL (pb));
2029
2030 irqs = probe_irq_on();
2031
2032 if (pb->modes & PARPORT_MODE_PCECR)
2033 frob_econtrol (pb, 0x10, 0x10);
2034
2035 clear_epp_timeout(pb);
2036 parport_pc_frob_control (pb, 0x20, 0x20);
2037 parport_pc_frob_control (pb, 0x10, 0x10);
2038 clear_epp_timeout(pb);
2039
2040 /* Device isn't expecting an EPP read
2041 * and generates an IRQ.
2042 */
2043 parport_pc_read_epp(pb);
2044 udelay(20);
2045
2046 pb->irq = probe_irq_off (irqs);
2047 if (pb->modes & PARPORT_MODE_PCECR)
2048 ECR_WRITE (pb, oecr);
2049 parport_pc_write_control(pb, 0xc);
2050
2051 if (pb->irq <= 0)
2052 pb->irq = PARPORT_IRQ_NONE;
2053
2054 return pb->irq;
2055 #endif /* Advanced detection */
2056 }
2057
2058 static int irq_probe_SPP(struct parport *pb)
2059 {
2060 /* Don't even try to do this. */
2061 return PARPORT_IRQ_NONE;
2062 }
2063
2064 /* We will attempt to share interrupt requests since other devices
2065 * such as sound cards and network cards seem to like using the
2066 * printer IRQs.
2067 *
2068 * When ECP is available we can autoprobe for IRQs.
2069 * NOTE: If we can autoprobe it, we can register the IRQ.
2070 */
2071 static int parport_irq_probe(struct parport *pb)
2072 {
2073 struct parport_pc_private *priv = pb->private_data;
2074
2075 if (priv->ecr) {
2076 pb->irq = programmable_irq_support(pb);
2077
2078 if (pb->irq == PARPORT_IRQ_NONE)
2079 pb->irq = irq_probe_ECP(pb);
2080 }
2081
2082 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
2083 (pb->modes & PARPORT_MODE_EPP))
2084 pb->irq = irq_probe_EPP(pb);
2085
2086 clear_epp_timeout(pb);
2087
2088 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
2089 pb->irq = irq_probe_EPP(pb);
2090
2091 clear_epp_timeout(pb);
2092
2093 if (pb->irq == PARPORT_IRQ_NONE)
2094 pb->irq = irq_probe_SPP(pb);
2095
2096 if (pb->irq == PARPORT_IRQ_NONE)
2097 pb->irq = get_superio_irq(pb);
2098
2099 return pb->irq;
2100 }
2101
2102 /* --- DMA detection -------------------------------------- */
2103
2104 /* Only if chipset conforms to ECP ISA Interface Standard */
2105 static int programmable_dma_support (struct parport *p)
2106 {
2107 unsigned char oecr = inb (ECONTROL (p));
2108 int dma;
2109
2110 frob_set_mode (p, ECR_CNF);
2111
2112 dma = inb (CONFIGB(p)) & 0x07;
2113 /* 000: Indicates jumpered 8-bit DMA if read-only.
2114 100: Indicates jumpered 16-bit DMA if read-only. */
2115 if ((dma & 0x03) == 0)
2116 dma = PARPORT_DMA_NONE;
2117
2118 ECR_WRITE (p, oecr);
2119 return dma;
2120 }
2121
2122 static int parport_dma_probe (struct parport *p)
2123 {
2124 const struct parport_pc_private *priv = p->private_data;
2125 if (priv->ecr)
2126 p->dma = programmable_dma_support(p); /* ask ECP chipset first */
2127 if (p->dma == PARPORT_DMA_NONE) {
2128 /* ask known Super-IO chips proper, although these
2129 claim ECP compatible, some don't report their DMA
2130 conforming to ECP standards */
2131 p->dma = get_superio_dma(p);
2132 }
2133
2134 return p->dma;
2135 }
2136
2137 /* --- Initialisation code -------------------------------- */
2138
2139 static LIST_HEAD(ports_list);
2140 static DEFINE_SPINLOCK(ports_lock);
2141
2142 struct parport *parport_pc_probe_port (unsigned long int base,
2143 unsigned long int base_hi,
2144 int irq, int dma,
2145 struct device *dev)
2146 {
2147 struct parport_pc_private *priv;
2148 struct parport_operations *ops;
2149 struct parport *p;
2150 int probedirq = PARPORT_IRQ_NONE;
2151 struct resource *base_res;
2152 struct resource *ECR_res = NULL;
2153 struct resource *EPP_res = NULL;
2154 struct platform_device *pdev = NULL;
2155
2156 if (!dev) {
2157 /* We need a physical device to attach to, but none was
2158 * provided. Create our own. */
2159 pdev = platform_device_register_simple("parport_pc",
2160 base, NULL, 0);
2161 if (IS_ERR(pdev))
2162 return NULL;
2163 dev = &pdev->dev;
2164 }
2165
2166 ops = kmalloc(sizeof (struct parport_operations), GFP_KERNEL);
2167 if (!ops)
2168 goto out1;
2169
2170 priv = kmalloc (sizeof (struct parport_pc_private), GFP_KERNEL);
2171 if (!priv)
2172 goto out2;
2173
2174 /* a misnomer, actually - it's allocate and reserve parport number */
2175 p = parport_register_port(base, irq, dma, ops);
2176 if (!p)
2177 goto out3;
2178
2179 base_res = request_region(base, 3, p->name);
2180 if (!base_res)
2181 goto out4;
2182
2183 memcpy(ops, &parport_pc_ops, sizeof (struct parport_operations));
2184 priv->ctr = 0xc;
2185 priv->ctr_writable = ~0x10;
2186 priv->ecr = 0;
2187 priv->fifo_depth = 0;
2188 priv->dma_buf = NULL;
2189 priv->dma_handle = 0;
2190 INIT_LIST_HEAD(&priv->list);
2191 priv->port = p;
2192
2193 p->dev = dev;
2194 p->base_hi = base_hi;
2195 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2196 p->private_data = priv;
2197
2198 if (base_hi) {
2199 ECR_res = request_region(base_hi, 3, p->name);
2200 if (ECR_res)
2201 parport_ECR_present(p);
2202 }
2203
2204 if (base != 0x3bc) {
2205 EPP_res = request_region(base+0x3, 5, p->name);
2206 if (EPP_res)
2207 if (!parport_EPP_supported(p))
2208 parport_ECPEPP_supported(p);
2209 }
2210 if (!parport_SPP_supported (p))
2211 /* No port. */
2212 goto out5;
2213 if (priv->ecr)
2214 parport_ECPPS2_supported(p);
2215 else
2216 parport_PS2_supported(p);
2217
2218 p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
2219
2220 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2221 if (p->base_hi && priv->ecr)
2222 printk(" (0x%lx)", p->base_hi);
2223 if (p->irq == PARPORT_IRQ_AUTO) {
2224 p->irq = PARPORT_IRQ_NONE;
2225 parport_irq_probe(p);
2226 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2227 p->irq = PARPORT_IRQ_NONE;
2228 parport_irq_probe(p);
2229 probedirq = p->irq;
2230 p->irq = PARPORT_IRQ_NONE;
2231 }
2232 if (p->irq != PARPORT_IRQ_NONE) {
2233 printk(", irq %d", p->irq);
2234 priv->ctr_writable |= 0x10;
2235
2236 if (p->dma == PARPORT_DMA_AUTO) {
2237 p->dma = PARPORT_DMA_NONE;
2238 parport_dma_probe(p);
2239 }
2240 }
2241 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2242 is mandatory (see above) */
2243 p->dma = PARPORT_DMA_NONE;
2244
2245 #ifdef CONFIG_PARPORT_PC_FIFO
2246 if (parport_ECP_supported(p) &&
2247 p->dma != PARPORT_DMA_NOFIFO &&
2248 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2249 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2250 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2251 #ifdef CONFIG_PARPORT_1284
2252 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2253 /* currently broken, but working on it.. (FB) */
2254 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2255 #endif /* IEEE 1284 support */
2256 if (p->dma != PARPORT_DMA_NONE) {
2257 printk(", dma %d", p->dma);
2258 p->modes |= PARPORT_MODE_DMA;
2259 }
2260 else printk(", using FIFO");
2261 }
2262 else
2263 /* We can't use the DMA channel after all. */
2264 p->dma = PARPORT_DMA_NONE;
2265 #endif /* Allowed to use FIFO/DMA */
2266
2267 printk(" [");
2268 #define printmode(x) {if(p->modes&PARPORT_MODE_##x){printk("%s%s",f?",":"",#x);f++;}}
2269 {
2270 int f = 0;
2271 printmode(PCSPP);
2272 printmode(TRISTATE);
2273 printmode(COMPAT)
2274 printmode(EPP);
2275 printmode(ECP);
2276 printmode(DMA);
2277 }
2278 #undef printmode
2279 #ifndef CONFIG_PARPORT_1284
2280 printk ("(,...)");
2281 #endif /* CONFIG_PARPORT_1284 */
2282 printk("]\n");
2283 if (probedirq != PARPORT_IRQ_NONE)
2284 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2285
2286 /* If No ECP release the ports grabbed above. */
2287 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2288 release_region(base_hi, 3);
2289 ECR_res = NULL;
2290 }
2291 /* Likewise for EEP ports */
2292 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2293 release_region(base+3, 5);
2294 EPP_res = NULL;
2295 }
2296 if (p->irq != PARPORT_IRQ_NONE) {
2297 if (request_irq (p->irq, parport_irq_handler,
2298 0, p->name, p)) {
2299 printk (KERN_WARNING "%s: irq %d in use, "
2300 "resorting to polled operation\n",
2301 p->name, p->irq);
2302 p->irq = PARPORT_IRQ_NONE;
2303 p->dma = PARPORT_DMA_NONE;
2304 }
2305
2306 #ifdef CONFIG_PARPORT_PC_FIFO
2307 #ifdef HAS_DMA
2308 if (p->dma != PARPORT_DMA_NONE) {
2309 if (request_dma (p->dma, p->name)) {
2310 printk (KERN_WARNING "%s: dma %d in use, "
2311 "resorting to PIO operation\n",
2312 p->name, p->dma);
2313 p->dma = PARPORT_DMA_NONE;
2314 } else {
2315 priv->dma_buf =
2316 dma_alloc_coherent(dev,
2317 PAGE_SIZE,
2318 &priv->dma_handle,
2319 GFP_KERNEL);
2320 if (! priv->dma_buf) {
2321 printk (KERN_WARNING "%s: "
2322 "cannot get buffer for DMA, "
2323 "resorting to PIO operation\n",
2324 p->name);
2325 free_dma(p->dma);
2326 p->dma = PARPORT_DMA_NONE;
2327 }
2328 }
2329 }
2330 #endif
2331 #endif
2332 }
2333
2334 /* Done probing. Now put the port into a sensible start-up state. */
2335 if (priv->ecr)
2336 /*
2337 * Put the ECP detected port in PS2 mode.
2338 * Do this also for ports that have ECR but don't do ECP.
2339 */
2340 ECR_WRITE (p, 0x34);
2341
2342 parport_pc_write_data(p, 0);
2343 parport_pc_data_forward (p);
2344
2345 /* Now that we've told the sharing engine about the port, and
2346 found out its characteristics, let the high-level drivers
2347 know about it. */
2348 spin_lock(&ports_lock);
2349 list_add(&priv->list, &ports_list);
2350 spin_unlock(&ports_lock);
2351 parport_announce_port (p);
2352
2353 return p;
2354
2355 out5:
2356 if (ECR_res)
2357 release_region(base_hi, 3);
2358 if (EPP_res)
2359 release_region(base+0x3, 5);
2360 release_region(base, 3);
2361 out4:
2362 parport_put_port(p);
2363 out3:
2364 kfree (priv);
2365 out2:
2366 kfree (ops);
2367 out1:
2368 if (pdev)
2369 platform_device_unregister(pdev);
2370 return NULL;
2371 }
2372
2373 EXPORT_SYMBOL (parport_pc_probe_port);
2374
2375 void parport_pc_unregister_port (struct parport *p)
2376 {
2377 struct parport_pc_private *priv = p->private_data;
2378 struct parport_operations *ops = p->ops;
2379
2380 parport_remove_port(p);
2381 spin_lock(&ports_lock);
2382 list_del_init(&priv->list);
2383 spin_unlock(&ports_lock);
2384 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2385 if (p->dma != PARPORT_DMA_NONE)
2386 free_dma(p->dma);
2387 #endif
2388 if (p->irq != PARPORT_IRQ_NONE)
2389 free_irq(p->irq, p);
2390 release_region(p->base, 3);
2391 if (p->size > 3)
2392 release_region(p->base + 3, p->size - 3);
2393 if (p->modes & PARPORT_MODE_ECP)
2394 release_region(p->base_hi, 3);
2395 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2396 if (priv->dma_buf)
2397 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2398 priv->dma_buf,
2399 priv->dma_handle);
2400 #endif
2401 kfree (p->private_data);
2402 parport_put_port(p);
2403 kfree (ops); /* hope no-one cached it */
2404 }
2405
2406 EXPORT_SYMBOL (parport_pc_unregister_port);
2407
2408 #ifdef CONFIG_PCI
2409
2410 /* ITE support maintained by Rich Liu <richliu@poorman.org> */
2411 static int __devinit sio_ite_8872_probe (struct pci_dev *pdev, int autoirq,
2412 int autodma,
2413 const struct parport_pc_via_data *via)
2414 {
2415 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2416 struct resource *base_res;
2417 u32 ite8872set;
2418 u32 ite8872_lpt, ite8872_lpthi;
2419 u8 ite8872_irq, type;
2420 int irq;
2421 int i;
2422
2423 DPRINTK (KERN_DEBUG "sio_ite_8872_probe()\n");
2424
2425 // make sure which one chip
2426 for(i = 0; i < 5; i++) {
2427 base_res = request_region(inta_addr[i], 32, "it887x");
2428 if (base_res) {
2429 int test;
2430 pci_write_config_dword (pdev, 0x60,
2431 0xe5000000 | inta_addr[i]);
2432 pci_write_config_dword (pdev, 0x78,
2433 0x00000000 | inta_addr[i]);
2434 test = inb (inta_addr[i]);
2435 if (test != 0xff) break;
2436 release_region(inta_addr[i], 0x8);
2437 }
2438 }
2439 if(i >= 5) {
2440 printk (KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2441 return 0;
2442 }
2443
2444 type = inb (inta_addr[i] + 0x18);
2445 type &= 0x0f;
2446
2447 switch (type) {
2448 case 0x2:
2449 printk (KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2450 ite8872set = 0x64200000;
2451 break;
2452 case 0xa:
2453 printk (KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2454 ite8872set = 0x64200000;
2455 break;
2456 case 0xe:
2457 printk (KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2458 ite8872set = 0x64e00000;
2459 break;
2460 case 0x6:
2461 printk (KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2462 return 0;
2463 case 0x8:
2464 DPRINTK (KERN_DEBUG "parport_pc: ITE8874 found (2S)\n");
2465 return 0;
2466 default:
2467 printk (KERN_INFO "parport_pc: unknown ITE887x\n");
2468 printk (KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2469 "output to Rich.Liu@ite.com.tw\n");
2470 return 0;
2471 }
2472
2473 pci_read_config_byte (pdev, 0x3c, &ite8872_irq);
2474 pci_read_config_dword (pdev, 0x1c, &ite8872_lpt);
2475 ite8872_lpt &= 0x0000ff00;
2476 pci_read_config_dword (pdev, 0x20, &ite8872_lpthi);
2477 ite8872_lpthi &= 0x0000ff00;
2478 pci_write_config_dword (pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2479 pci_write_config_dword (pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2480 pci_write_config_dword (pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2481 // SET SPP&EPP , Parallel Port NO DMA , Enable All Function
2482 // SET Parallel IRQ
2483 pci_write_config_dword (pdev, 0x9c,
2484 ite8872set | (ite8872_irq * 0x11111));
2485
2486 DPRINTK (KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2487 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2488 ite8872_lpt);
2489 DPRINTK (KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2490 ite8872_lpthi);
2491
2492 /* Let the user (or defaults) steer us away from interrupts */
2493 irq = ite8872_irq;
2494 if (autoirq != PARPORT_IRQ_AUTO)
2495 irq = PARPORT_IRQ_NONE;
2496
2497 /*
2498 * Release the resource so that parport_pc_probe_port can get it.
2499 */
2500 release_resource(base_res);
2501 if (parport_pc_probe_port (ite8872_lpt, ite8872_lpthi,
2502 irq, PARPORT_DMA_NONE, &pdev->dev)) {
2503 printk (KERN_INFO
2504 "parport_pc: ITE 8872 parallel port: io=0x%X",
2505 ite8872_lpt);
2506 if (irq != PARPORT_IRQ_NONE)
2507 printk (", irq=%d", irq);
2508 printk ("\n");
2509 return 1;
2510 }
2511
2512 return 0;
2513 }
2514
2515 /* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2516 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2517 static int __devinitdata parport_init_mode = 0;
2518
2519 /* Data for two known VIA chips */
2520 static struct parport_pc_via_data via_686a_data __devinitdata = {
2521 0x51,
2522 0x50,
2523 0x85,
2524 0x02,
2525 0xE2,
2526 0xF0,
2527 0xE6
2528 };
2529 static struct parport_pc_via_data via_8231_data __devinitdata = {
2530 0x45,
2531 0x44,
2532 0x50,
2533 0x04,
2534 0xF2,
2535 0xFA,
2536 0xF6
2537 };
2538
2539 static int __devinit sio_via_probe (struct pci_dev *pdev, int autoirq,
2540 int autodma,
2541 const struct parport_pc_via_data *via)
2542 {
2543 u8 tmp, tmp2, siofunc;
2544 u8 ppcontrol = 0;
2545 int dma, irq;
2546 unsigned port1, port2;
2547 unsigned have_epp = 0;
2548
2549 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2550
2551 switch(parport_init_mode)
2552 {
2553 case 1:
2554 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2555 siofunc = VIA_FUNCTION_PARPORT_SPP;
2556 break;
2557 case 2:
2558 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2559 siofunc = VIA_FUNCTION_PARPORT_SPP;
2560 ppcontrol = VIA_PARPORT_BIDIR;
2561 break;
2562 case 3:
2563 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2564 siofunc = VIA_FUNCTION_PARPORT_EPP;
2565 ppcontrol = VIA_PARPORT_BIDIR;
2566 have_epp = 1;
2567 break;
2568 case 4:
2569 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2570 siofunc = VIA_FUNCTION_PARPORT_ECP;
2571 ppcontrol = VIA_PARPORT_BIDIR;
2572 break;
2573 case 5:
2574 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2575 siofunc = VIA_FUNCTION_PARPORT_ECP;
2576 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2577 have_epp = 1;
2578 break;
2579 default:
2580 printk(KERN_DEBUG "parport_pc: probing current configuration\n");
2581 siofunc = VIA_FUNCTION_PROBE;
2582 break;
2583 }
2584 /*
2585 * unlock super i/o configuration
2586 */
2587 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2588 tmp |= via->via_pci_superio_config_data;
2589 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2590
2591 /* Bits 1-0: Parallel Port Mode / Enable */
2592 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2593 tmp = inb (VIA_CONFIG_DATA);
2594 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2595 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2596 tmp2 = inb (VIA_CONFIG_DATA);
2597 if (siofunc == VIA_FUNCTION_PROBE)
2598 {
2599 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2600 ppcontrol = tmp2;
2601 }
2602 else
2603 {
2604 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2605 tmp |= siofunc;
2606 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2607 outb(tmp, VIA_CONFIG_DATA);
2608 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2609 tmp2 |= ppcontrol;
2610 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2611 outb(tmp2, VIA_CONFIG_DATA);
2612 }
2613
2614 /* Parallel Port I/O Base Address, bits 9-2 */
2615 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2616 port1 = inb(VIA_CONFIG_DATA) << 2;
2617
2618 printk (KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",port1);
2619 if ((port1 == 0x3BC) && have_epp)
2620 {
2621 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2622 outb((0x378 >> 2), VIA_CONFIG_DATA);
2623 printk(KERN_DEBUG "parport_pc: Parallel port base changed to 0x378\n");
2624 port1 = 0x378;
2625 }
2626
2627 /*
2628 * lock super i/o configuration
2629 */
2630 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2631 tmp &= ~via->via_pci_superio_config_data;
2632 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2633
2634 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2635 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2636 return 0;
2637 }
2638
2639 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2640 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2641 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2642
2643 if (siofunc == VIA_FUNCTION_PARPORT_ECP)
2644 {
2645 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2646 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2647 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2648 }
2649 else
2650 /* if ECP not enabled, DMA is not enabled, assumed bogus 'dma' value */
2651 dma = PARPORT_DMA_NONE;
2652
2653 /* Let the user (or defaults) steer us away from interrupts and DMA */
2654 if (autoirq == PARPORT_IRQ_NONE) {
2655 irq = PARPORT_IRQ_NONE;
2656 dma = PARPORT_DMA_NONE;
2657 }
2658 if (autodma == PARPORT_DMA_NONE)
2659 dma = PARPORT_DMA_NONE;
2660
2661 switch (port1) {
2662 case 0x3bc: port2 = 0x7bc; break;
2663 case 0x378: port2 = 0x778; break;
2664 case 0x278: port2 = 0x678; break;
2665 default:
2666 printk(KERN_INFO "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2667 port1);
2668 return 0;
2669 }
2670
2671 /* filter bogus IRQs */
2672 switch (irq) {
2673 case 0:
2674 case 2:
2675 case 8:
2676 case 13:
2677 irq = PARPORT_IRQ_NONE;
2678 break;
2679
2680 default: /* do nothing */
2681 break;
2682 }
2683
2684 /* finally, do the probe with values obtained */
2685 if (parport_pc_probe_port (port1, port2, irq, dma, &pdev->dev)) {
2686 printk (KERN_INFO
2687 "parport_pc: VIA parallel port: io=0x%X", port1);
2688 if (irq != PARPORT_IRQ_NONE)
2689 printk (", irq=%d", irq);
2690 if (dma != PARPORT_DMA_NONE)
2691 printk (", dma=%d", dma);
2692 printk ("\n");
2693 return 1;
2694 }
2695
2696 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2697 port1, irq, dma);
2698 return 0;
2699 }
2700
2701
2702 enum parport_pc_sio_types {
2703 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2704 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2705 sio_ite_8872,
2706 last_sio
2707 };
2708
2709 /* each element directly indexed from enum list, above */
2710 static struct parport_pc_superio {
2711 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2712 const struct parport_pc_via_data *via);
2713 const struct parport_pc_via_data *via;
2714 } parport_pc_superio_info[] __devinitdata = {
2715 { sio_via_probe, &via_686a_data, },
2716 { sio_via_probe, &via_8231_data, },
2717 { sio_ite_8872_probe, NULL, },
2718 };
2719
2720 enum parport_pc_pci_cards {
2721 siig_1p_10x = last_sio,
2722 siig_2p_10x,
2723 siig_1p_20x,
2724 siig_2p_20x,
2725 lava_parallel,
2726 lava_parallel_dual_a,
2727 lava_parallel_dual_b,
2728 boca_ioppar,
2729 plx_9050,
2730 timedia_4078a,
2731 timedia_4079h,
2732 timedia_4085h,
2733 timedia_4088a,
2734 timedia_4089a,
2735 timedia_4095a,
2736 timedia_4096a,
2737 timedia_4078u,
2738 timedia_4079a,
2739 timedia_4085u,
2740 timedia_4079r,
2741 timedia_4079s,
2742 timedia_4079d,
2743 timedia_4079e,
2744 timedia_4079f,
2745 timedia_9079a,
2746 timedia_9079b,
2747 timedia_9079c,
2748 timedia_4006a,
2749 timedia_4014,
2750 timedia_4008a,
2751 timedia_4018,
2752 timedia_9018a,
2753 syba_2p_epp,
2754 syba_1p_ecp,
2755 titan_010l,
2756 titan_1284p1,
2757 titan_1284p2,
2758 avlab_1p,
2759 avlab_2p,
2760 oxsemi_952,
2761 oxsemi_954,
2762 oxsemi_840,
2763 aks_0100,
2764 mobility_pp,
2765 netmos_9705,
2766 netmos_9715,
2767 netmos_9755,
2768 netmos_9805,
2769 netmos_9815,
2770 };
2771
2772
2773 /* each element directly indexed from enum list, above
2774 * (but offset by last_sio) */
2775 static struct parport_pc_pci {
2776 int numports;
2777 struct { /* BAR (base address registers) numbers in the config
2778 space header */
2779 int lo;
2780 int hi; /* -1 if not there, >6 for offset-method (max
2781 BAR is 6) */
2782 } addr[4];
2783
2784 /* If set, this is called immediately after pci_enable_device.
2785 * If it returns non-zero, no probing will take place and the
2786 * ports will not be used. */
2787 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2788
2789 /* If set, this is called after probing for ports. If 'failed'
2790 * is non-zero we couldn't use any of the ports. */
2791 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2792 } cards[] = {
2793 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2794 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2795 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2796 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2797 /* lava_parallel */ { 1, { { 0, -1 }, } },
2798 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2799 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2800 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2801 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2802 /* timedia_4078a */ { 1, { { 2, -1 }, } },
2803 /* timedia_4079h */ { 1, { { 2, 3 }, } },
2804 /* timedia_4085h */ { 2, { { 2, -1 }, { 4, -1 }, } },
2805 /* timedia_4088a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2806 /* timedia_4089a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2807 /* timedia_4095a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2808 /* timedia_4096a */ { 2, { { 2, 3 }, { 4, 5 }, } },
2809 /* timedia_4078u */ { 1, { { 2, -1 }, } },
2810 /* timedia_4079a */ { 1, { { 2, 3 }, } },
2811 /* timedia_4085u */ { 2, { { 2, -1 }, { 4, -1 }, } },
2812 /* timedia_4079r */ { 1, { { 2, 3 }, } },
2813 /* timedia_4079s */ { 1, { { 2, 3 }, } },
2814 /* timedia_4079d */ { 1, { { 2, 3 }, } },
2815 /* timedia_4079e */ { 1, { { 2, 3 }, } },
2816 /* timedia_4079f */ { 1, { { 2, 3 }, } },
2817 /* timedia_9079a */ { 1, { { 2, 3 }, } },
2818 /* timedia_9079b */ { 1, { { 2, 3 }, } },
2819 /* timedia_9079c */ { 1, { { 2, 3 }, } },
2820 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2821 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2822 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2823 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2824 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2825 /* SYBA uses fixed offsets in
2826 a 1K io window */
2827 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2828 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2829 /* titan_010l */ { 1, { { 3, -1 }, } },
2830 /* titan_1284p1 */ { 1, { { 0, 1 }, } },
2831 /* titan_1284p2 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2832 /* avlab_1p */ { 1, { { 0, 1}, } },
2833 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2834 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2835 * and 840 locks up if you write 1 to bit 2! */
2836 /* oxsemi_952 */ { 1, { { 0, 1 }, } },
2837 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2838 /* oxsemi_840 */ { 1, { { 0, -1 }, } },
2839 /* aks_0100 */ { 1, { { 0, -1 }, } },
2840 /* mobility_pp */ { 1, { { 0, 1 }, } },
2841 /* netmos_9705 */ { 1, { { 0, -1 }, } }, /* untested */
2842 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2843 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} }, /* untested */
2844 /* netmos_9805 */ { 1, { { 0, -1 }, } }, /* untested */
2845 /* netmos_9815 */ { 2, { { 0, -1 }, { 2, -1 }, } }, /* untested */
2846 };
2847
2848 static const struct pci_device_id parport_pc_pci_tbl[] = {
2849 /* Super-IO onboard chips */
2850 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2851 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2852 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2853 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2854
2855 /* PCI cards */
2856 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2857 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2858 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2859 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2860 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2861 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2862 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2863 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2864 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2865 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2866 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2867 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2868 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2869 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2870 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2871 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2872 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2873 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0,0, plx_9050 },
2874 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2875 { 0x1409, 0x7168, 0x1409, 0x4078, 0, 0, timedia_4078a },
2876 { 0x1409, 0x7168, 0x1409, 0x4079, 0, 0, timedia_4079h },
2877 { 0x1409, 0x7168, 0x1409, 0x4085, 0, 0, timedia_4085h },
2878 { 0x1409, 0x7168, 0x1409, 0x4088, 0, 0, timedia_4088a },
2879 { 0x1409, 0x7168, 0x1409, 0x4089, 0, 0, timedia_4089a },
2880 { 0x1409, 0x7168, 0x1409, 0x4095, 0, 0, timedia_4095a },
2881 { 0x1409, 0x7168, 0x1409, 0x4096, 0, 0, timedia_4096a },
2882 { 0x1409, 0x7168, 0x1409, 0x5078, 0, 0, timedia_4078u },
2883 { 0x1409, 0x7168, 0x1409, 0x5079, 0, 0, timedia_4079a },
2884 { 0x1409, 0x7168, 0x1409, 0x5085, 0, 0, timedia_4085u },
2885 { 0x1409, 0x7168, 0x1409, 0x6079, 0, 0, timedia_4079r },
2886 { 0x1409, 0x7168, 0x1409, 0x7079, 0, 0, timedia_4079s },
2887 { 0x1409, 0x7168, 0x1409, 0x8079, 0, 0, timedia_4079d },
2888 { 0x1409, 0x7168, 0x1409, 0x9079, 0, 0, timedia_4079e },
2889 { 0x1409, 0x7168, 0x1409, 0xa079, 0, 0, timedia_4079f },
2890 { 0x1409, 0x7168, 0x1409, 0xb079, 0, 0, timedia_9079a },
2891 { 0x1409, 0x7168, 0x1409, 0xc079, 0, 0, timedia_9079b },
2892 { 0x1409, 0x7168, 0x1409, 0xd079, 0, 0, timedia_9079c },
2893 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2894 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2895 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2896 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2897 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2898 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2899 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2900 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2901 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2902 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2903 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2904 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2905 { 0x9710, 0x9805, 0x1000, 0x0010, 0, 0, titan_1284p1 },
2906 { 0x9710, 0x9815, 0x1000, 0x0020, 0, 0, titan_1284p2 },
2907 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2908 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p}, /* AFAVLAB_TK9902 */
2909 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2910 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2911 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2912 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2913 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2914 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2915 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2916 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2917 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2918 /* NetMos communication controllers */
2919 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2920 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2921 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2922 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2923 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2924 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2925 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2926 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2927 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2928 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2929 { 0, } /* terminate list */
2930 };
2931 MODULE_DEVICE_TABLE(pci,parport_pc_pci_tbl);
2932
2933 struct pci_parport_data {
2934 int num;
2935 struct parport *ports[2];
2936 };
2937
2938 static int parport_pc_pci_probe (struct pci_dev *dev,
2939 const struct pci_device_id *id)
2940 {
2941 int err, count, n, i = id->driver_data;
2942 struct pci_parport_data *data;
2943
2944 if (i < last_sio)
2945 /* This is an onboard Super-IO and has already been probed */
2946 return 0;
2947
2948 /* This is a PCI card */
2949 i -= last_sio;
2950 count = 0;
2951 if ((err = pci_enable_device (dev)) != 0)
2952 return err;
2953
2954 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2955 if (!data)
2956 return -ENOMEM;
2957
2958 if (cards[i].preinit_hook &&
2959 cards[i].preinit_hook (dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2960 kfree(data);
2961 return -ENODEV;
2962 }
2963
2964 for (n = 0; n < cards[i].numports; n++) {
2965 int lo = cards[i].addr[n].lo;
2966 int hi = cards[i].addr[n].hi;
2967 unsigned long io_lo, io_hi;
2968 io_lo = pci_resource_start (dev, lo);
2969 io_hi = 0;
2970 if ((hi >= 0) && (hi <= 6))
2971 io_hi = pci_resource_start (dev, hi);
2972 else if (hi > 6)
2973 io_lo += hi; /* Reinterpret the meaning of
2974 "hi" as an offset (see SYBA
2975 def.) */
2976 /* TODO: test if sharing interrupts works */
2977 printk (KERN_DEBUG "PCI parallel port detected: %04x:%04x, "
2978 "I/O at %#lx(%#lx)\n",
2979 parport_pc_pci_tbl[i + last_sio].vendor,
2980 parport_pc_pci_tbl[i + last_sio].device, io_lo, io_hi);
2981 data->ports[count] =
2982 parport_pc_probe_port (io_lo, io_hi, PARPORT_IRQ_NONE,
2983 PARPORT_DMA_NONE, &dev->dev);
2984 if (data->ports[count])
2985 count++;
2986 }
2987
2988 data->num = count;
2989
2990 if (cards[i].postinit_hook)
2991 cards[i].postinit_hook (dev, count == 0);
2992
2993 if (count) {
2994 pci_set_drvdata(dev, data);
2995 return 0;
2996 }
2997
2998 kfree(data);
2999
3000 return -ENODEV;
3001 }
3002
3003 static void __devexit parport_pc_pci_remove(struct pci_dev *dev)
3004 {
3005 struct pci_parport_data *data = pci_get_drvdata(dev);
3006 int i;
3007
3008 pci_set_drvdata(dev, NULL);
3009
3010 if (data) {
3011 for (i = data->num - 1; i >= 0; i--)
3012 parport_pc_unregister_port(data->ports[i]);
3013
3014 kfree(data);
3015 }
3016 }
3017
3018 static struct pci_driver parport_pc_pci_driver = {
3019 .name = "parport_pc",
3020 .id_table = parport_pc_pci_tbl,
3021 .probe = parport_pc_pci_probe,
3022 .remove = __devexit_p(parport_pc_pci_remove),
3023 };
3024
3025 static int __init parport_pc_init_superio (int autoirq, int autodma)
3026 {
3027 const struct pci_device_id *id;
3028 struct pci_dev *pdev = NULL;
3029 int ret = 0;
3030
3031 for_each_pci_dev(pdev) {
3032 id = pci_match_id(parport_pc_pci_tbl, pdev);
3033 if (id == NULL || id->driver_data >= last_sio)
3034 continue;
3035
3036 if (parport_pc_superio_info[id->driver_data].probe
3037 (pdev, autoirq, autodma,parport_pc_superio_info[id->driver_data].via)) {
3038 ret++;
3039 }
3040 }
3041
3042 return ret; /* number of devices found */
3043 }
3044 #else
3045 static struct pci_driver parport_pc_pci_driver;
3046 static int __init parport_pc_init_superio(int autoirq, int autodma) {return 0;}
3047 #endif /* CONFIG_PCI */
3048
3049
3050 static const struct pnp_device_id parport_pc_pnp_tbl[] = {
3051 /* Standard LPT Printer Port */
3052 {.id = "PNP0400", .driver_data = 0},
3053 /* ECP Printer Port */
3054 {.id = "PNP0401", .driver_data = 0},
3055 { }
3056 };
3057
3058 MODULE_DEVICE_TABLE(pnp,parport_pc_pnp_tbl);
3059
3060 static int parport_pc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
3061 {
3062 struct parport *pdata;
3063 unsigned long io_lo, io_hi;
3064 int dma, irq;
3065
3066 if (pnp_port_valid(dev,0) &&
3067 !(pnp_port_flags(dev,0) & IORESOURCE_DISABLED)) {
3068 io_lo = pnp_port_start(dev,0);
3069 } else
3070 return -EINVAL;
3071
3072 if (pnp_port_valid(dev,1) &&
3073 !(pnp_port_flags(dev,1) & IORESOURCE_DISABLED)) {
3074 io_hi = pnp_port_start(dev,1);
3075 } else
3076 io_hi = 0;
3077
3078 if (pnp_irq_valid(dev,0) &&
3079 !(pnp_irq_flags(dev,0) & IORESOURCE_DISABLED)) {
3080 irq = pnp_irq(dev,0);
3081 } else
3082 irq = PARPORT_IRQ_NONE;
3083
3084 if (pnp_dma_valid(dev,0) &&
3085 !(pnp_dma_flags(dev,0) & IORESOURCE_DISABLED)) {
3086 dma = pnp_dma(dev,0);
3087 } else
3088 dma = PARPORT_DMA_NONE;
3089
3090 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
3091 if (!(pdata = parport_pc_probe_port (io_lo, io_hi, irq, dma, &dev->dev)))
3092 return -ENODEV;
3093
3094 pnp_set_drvdata(dev,pdata);
3095 return 0;
3096 }
3097
3098 static void parport_pc_pnp_remove(struct pnp_dev *dev)
3099 {
3100 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3101 if (!pdata)
3102 return;
3103
3104 parport_pc_unregister_port(pdata);
3105 }
3106
3107 /* we only need the pnp layer to activate the device, at least for now */
3108 static struct pnp_driver parport_pc_pnp_driver = {
3109 .name = "parport_pc",
3110 .id_table = parport_pc_pnp_tbl,
3111 .probe = parport_pc_pnp_probe,
3112 .remove = parport_pc_pnp_remove,
3113 };
3114
3115
3116 static int __devinit parport_pc_platform_probe(struct platform_device *pdev)
3117 {
3118 /* Always succeed, the actual probing is done in
3119 * parport_pc_probe_port(). */
3120 return 0;
3121 }
3122
3123 static struct platform_driver parport_pc_platform_driver = {
3124 .driver = {
3125 .owner = THIS_MODULE,
3126 .name = "parport_pc",
3127 },
3128 .probe = parport_pc_platform_probe,
3129 };
3130
3131 /* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3132 static int __devinit __attribute__((unused))
3133 parport_pc_find_isa_ports (int autoirq, int autodma)
3134 {
3135 int count = 0;
3136
3137 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL))
3138 count++;
3139 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL))
3140 count++;
3141 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL))
3142 count++;
3143
3144 return count;
3145 }
3146
3147 /* This function is called by parport_pc_init if the user didn't
3148 * specify any ports to probe. Its job is to find some ports. Order
3149 * is important here -- we want ISA ports to be registered first,
3150 * followed by PCI cards (for least surprise), but before that we want
3151 * to do chipset-specific tests for some onboard ports that we know
3152 * about.
3153 *
3154 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3155 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3156 */
3157 static void __init parport_pc_find_ports (int autoirq, int autodma)
3158 {
3159 int count = 0, err;
3160
3161 #ifdef CONFIG_PARPORT_PC_SUPERIO
3162 detect_and_report_winbond ();
3163 detect_and_report_smsc ();
3164 #endif
3165
3166 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3167 count += parport_pc_init_superio (autoirq, autodma);
3168
3169 /* PnP ports, skip detection if SuperIO already found them */
3170 if (!count) {
3171 err = pnp_register_driver (&parport_pc_pnp_driver);
3172 if (!err)
3173 pnp_registered_parport = 1;
3174 }
3175
3176 /* ISA ports and whatever (see asm/parport.h). */
3177 parport_pc_find_nonpci_ports (autoirq, autodma);
3178
3179 err = pci_register_driver (&parport_pc_pci_driver);
3180 if (!err)
3181 pci_registered_parport = 1;
3182 }
3183
3184 /*
3185 * Piles of crap below pretend to be a parser for module and kernel
3186 * parameters. Say "thank you" to whoever had come up with that
3187 * syntax and keep in mind that code below is a cleaned up version.
3188 */
3189
3190 static int __initdata io[PARPORT_PC_MAX_PORTS+1] = { [0 ... PARPORT_PC_MAX_PORTS] = 0 };
3191 static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] =
3192 { [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO };
3193 static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE };
3194 static int __initdata irqval[PARPORT_PC_MAX_PORTS] = { [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY };
3195
3196 static int __init parport_parse_param(const char *s, int *val,
3197 int automatic, int none, int nofifo)
3198 {
3199 if (!s)
3200 return 0;
3201 if (!strncmp(s, "auto", 4))
3202 *val = automatic;
3203 else if (!strncmp(s, "none", 4))
3204 *val = none;
3205 else if (nofifo && !strncmp(s, "nofifo", 4))
3206 *val = nofifo;
3207 else {
3208 char *ep;
3209 unsigned long r = simple_strtoul(s, &ep, 0);
3210 if (ep != s)
3211 *val = r;
3212 else {
3213 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3214 return -1;
3215 }
3216 }
3217 return 0;
3218 }
3219
3220 static int __init parport_parse_irq(const char *irqstr, int *val)
3221 {
3222 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3223 PARPORT_IRQ_NONE, 0);
3224 }
3225
3226 static int __init parport_parse_dma(const char *dmastr, int *val)
3227 {
3228 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3229 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3230 }
3231
3232 #ifdef CONFIG_PCI
3233 static int __init parport_init_mode_setup(char *str)
3234 {
3235 printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3236
3237 if (!strcmp (str, "spp"))
3238 parport_init_mode=1;
3239 if (!strcmp (str, "ps2"))
3240 parport_init_mode=2;
3241 if (!strcmp (str, "epp"))
3242 parport_init_mode=3;
3243 if (!strcmp (str, "ecp"))
3244 parport_init_mode=4;
3245 if (!strcmp (str, "ecpepp"))
3246 parport_init_mode=5;
3247 return 1;
3248 }
3249 #endif
3250
3251 #ifdef MODULE
3252 static const char *irq[PARPORT_PC_MAX_PORTS];
3253 static const char *dma[PARPORT_PC_MAX_PORTS];
3254
3255 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3256 module_param_array(io, int, NULL, 0);
3257 MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3258 module_param_array(io_hi, int, NULL, 0);
3259 MODULE_PARM_DESC(irq, "IRQ line");
3260 module_param_array(irq, charp, NULL, 0);
3261 MODULE_PARM_DESC(dma, "DMA channel");
3262 module_param_array(dma, charp, NULL, 0);
3263 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3264 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3265 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3266 module_param(verbose_probing, int, 0644);
3267 #endif
3268 #ifdef CONFIG_PCI
3269 static char *init_mode;
3270 MODULE_PARM_DESC(init_mode, "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3271 module_param(init_mode, charp, 0);
3272 #endif
3273
3274 static int __init parse_parport_params(void)
3275 {
3276 unsigned int i;
3277 int val;
3278
3279 #ifdef CONFIG_PCI
3280 if (init_mode)
3281 parport_init_mode_setup(init_mode);
3282 #endif
3283
3284 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3285 if (parport_parse_irq(irq[i], &val))
3286 return 1;
3287 irqval[i] = val;
3288 if (parport_parse_dma(dma[i], &val))
3289 return 1;
3290 dmaval[i] = val;
3291 }
3292 if (!io[0]) {
3293 /* The user can make us use any IRQs or DMAs we find. */
3294 if (irq[0] && !parport_parse_irq(irq[0], &val))
3295 switch (val) {
3296 case PARPORT_IRQ_NONE:
3297 case PARPORT_IRQ_AUTO:
3298 irqval[0] = val;
3299 break;
3300 default:
3301 printk (KERN_WARNING
3302 "parport_pc: irq specified "
3303 "without base address. Use 'io=' "
3304 "to specify one\n");
3305 }
3306
3307 if (dma[0] && !parport_parse_dma(dma[0], &val))
3308 switch (val) {
3309 case PARPORT_DMA_NONE:
3310 case PARPORT_DMA_AUTO:
3311 dmaval[0] = val;
3312 break;
3313 default:
3314 printk (KERN_WARNING
3315 "parport_pc: dma specified "
3316 "without base address. Use 'io=' "
3317 "to specify one\n");
3318 }
3319 }
3320 return 0;
3321 }
3322
3323 #else
3324
3325 static int parport_setup_ptr __initdata = 0;
3326
3327 /*
3328 * Acceptable parameters:
3329 *
3330 * parport=0
3331 * parport=auto
3332 * parport=0xBASE[,IRQ[,DMA]]
3333 *
3334 * IRQ/DMA may be numeric or 'auto' or 'none'
3335 */
3336 static int __init parport_setup (char *str)
3337 {
3338 char *endptr;
3339 char *sep;
3340 int val;
3341
3342 if (!str || !*str || (*str == '0' && !*(str+1))) {
3343 /* Disable parport if "parport=0" in cmdline */
3344 io[0] = PARPORT_DISABLE;
3345 return 1;
3346 }
3347
3348 if (!strncmp (str, "auto", 4)) {
3349 irqval[0] = PARPORT_IRQ_AUTO;
3350 dmaval[0] = PARPORT_DMA_AUTO;
3351 return 1;
3352 }
3353
3354 val = simple_strtoul (str, &endptr, 0);
3355 if (endptr == str) {
3356 printk (KERN_WARNING "parport=%s not understood\n", str);
3357 return 1;
3358 }
3359
3360 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3361 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3362 return 1;
3363 }
3364
3365 io[parport_setup_ptr] = val;
3366 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3367 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3368
3369 sep = strchr(str, ',');
3370 if (sep++) {
3371 if (parport_parse_irq(sep, &val))
3372 return 1;
3373 irqval[parport_setup_ptr] = val;
3374 sep = strchr(sep, ',');
3375 if (sep++) {
3376 if (parport_parse_dma(sep, &val))
3377 return 1;
3378 dmaval[parport_setup_ptr] = val;
3379 }
3380 }
3381 parport_setup_ptr++;
3382 return 1;
3383 }
3384
3385 static int __init parse_parport_params(void)
3386 {
3387 return io[0] == PARPORT_DISABLE;
3388 }
3389
3390 __setup ("parport=", parport_setup);
3391
3392 /*
3393 * Acceptable parameters:
3394 *
3395 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3396 */
3397 #ifdef CONFIG_PCI
3398 __setup("parport_init_mode=",parport_init_mode_setup);
3399 #endif
3400 #endif
3401
3402 /* "Parser" ends here */
3403
3404 static int __init parport_pc_init(void)
3405 {
3406 int err;
3407
3408 if (parse_parport_params())
3409 return -EINVAL;
3410
3411 err = platform_driver_register(&parport_pc_platform_driver);
3412 if (err)
3413 return err;
3414
3415 if (io[0]) {
3416 int i;
3417 /* Only probe the ports we were given. */
3418 user_specified = 1;
3419 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3420 if (!io[i])
3421 break;
3422 if ((io_hi[i]) == PARPORT_IOHI_AUTO)
3423 io_hi[i] = 0x400 + io[i];
3424 parport_pc_probe_port(io[i], io_hi[i],
3425 irqval[i], dmaval[i], NULL);
3426 }
3427 } else
3428 parport_pc_find_ports (irqval[0], dmaval[0]);
3429
3430 return 0;
3431 }
3432
3433 static void __exit parport_pc_exit(void)
3434 {
3435 if (pci_registered_parport)
3436 pci_unregister_driver (&parport_pc_pci_driver);
3437 if (pnp_registered_parport)
3438 pnp_unregister_driver (&parport_pc_pnp_driver);
3439 platform_driver_unregister(&parport_pc_platform_driver);
3440
3441 while (!list_empty(&ports_list)) {
3442 struct parport_pc_private *priv;
3443 struct parport *port;
3444 priv = list_entry(ports_list.next,
3445 struct parport_pc_private, list);
3446 port = priv->port;
3447 if (port->dev && port->dev->bus == &platform_bus_type)
3448 platform_device_unregister(
3449 to_platform_device(port->dev));
3450 parport_pc_unregister_port(port);
3451 }
3452 }
3453
3454 MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3455 MODULE_DESCRIPTION("PC-style parallel port driver");
3456 MODULE_LICENSE("GPL");
3457 module_init(parport_pc_init)
3458 module_exit(parport_pc_exit)
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