1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Low-level parallel-port routines for 8255-based PC-style hardware.
3 *
4 * Authors: Phil Blundell <philb@gnu.org>
5 * Tim Waugh <tim@cyberelk.demon.co.uk>
6 * Jose Renau <renau@acm.org>
7 * David Campbell
8 * Andrea Arcangeli
9 *
10 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
11 *
12 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
13 * DMA support - Bert De Jonghe <bert@sophis.be>
14 * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
15 * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
16 * Various hacks, Fred Barnes, 04/2001
17 * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
18 */
19
20 /* This driver should work with any hardware that is broadly compatible
21 * with that in the IBM PC. This applies to the majority of integrated
22 * I/O chipsets that are commonly available. The expected register
23 * layout is:
24 *
25 * base+0 data
26 * base+1 status
27 * base+2 control
28 *
29 * In addition, there are some optional registers:
30 *
31 * base+3 EPP address
32 * base+4 EPP data
33 * base+0x400 ECP config A
34 * base+0x401 ECP config B
35 * base+0x402 ECP control
36 *
37 * All registers are 8 bits wide and read/write. If your hardware differs
38 * only in register addresses (eg because your registers are on 32-bit
39 * word boundaries) then you can alter the constants in parport_pc.h to
40 * accommodate this.
41 *
42 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
43 * but rather will start at port->base_hi.
44 */
45
46 #include <linux/module.h>
47 #include <linux/init.h>
48 #include <linux/sched/signal.h>
49 #include <linux/delay.h>
50 #include <linux/errno.h>
51 #include <linux/interrupt.h>
52 #include <linux/ioport.h>
53 #include <linux/kernel.h>
54 #include <linux/slab.h>
55 #include <linux/dma-mapping.h>
56 #include <linux/pci.h>
57 #include <linux/pnp.h>
58 #include <linux/platform_device.h>
59 #include <linux/sysctl.h>
60 #include <linux/io.h>
61 #include <linux/uaccess.h>
62
63 #include <asm/dma.h>
64
65 #include <linux/parport.h>
66 #include <linux/parport_pc.h>
67 #include <linux/via.h>
68 #include <asm/parport.h>
69
70 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
71
72 #ifdef CONFIG_ISA_DMA_API
73 #define HAS_DMA
74 #endif
75
76 /* ECR modes */
77 #define ECR_SPP 00
78 #define ECR_PS2 01
79 #define ECR_PPF 02
80 #define ECR_ECP 03
81 #define ECR_EPP 04
82 #define ECR_VND 05
83 #define ECR_TST 06
84 #define ECR_CNF 07
85 #define ECR_MODE_MASK 0xe0
86 #define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v))
87
88 #undef DEBUG
89
90 #define NR_SUPERIOS 3
91 static struct superio_struct { /* For Super-IO chips autodetection */
92 int io;
93 int irq;
94 int dma;
95 } superios[NR_SUPERIOS] = { {0,},};
96
97 static int user_specified;
98 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
99 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
100 static int verbose_probing;
101 #endif
102 static int pci_registered_parport;
103 static int pnp_registered_parport;
104
105 /* frob_control, but for ECR */
frob_econtrol(struct parport * pb,unsigned char m,unsigned char v)106 static void frob_econtrol(struct parport *pb, unsigned char m,
107 unsigned char v)
108 {
109 const struct parport_pc_private *priv = pb->physport->private_data;
110 unsigned char ecr_writable = priv->ecr_writable;
111 unsigned char ectr = 0;
112 unsigned char new;
113
114 if (m != 0xff)
115 ectr = inb(ECONTROL(pb));
116
117 new = (ectr & ~m) ^ v;
118 if (ecr_writable)
119 /* All known users of the ECR mask require bit 0 to be set. */
120 new = (new & ecr_writable) | 1;
121
122 pr_debug("frob_econtrol(%02x,%02x): %02x -> %02x\n", m, v, ectr, new);
123
124 outb(new, ECONTROL(pb));
125 }
126
frob_set_mode(struct parport * p,int mode)127 static inline void frob_set_mode(struct parport *p, int mode)
128 {
129 frob_econtrol(p, ECR_MODE_MASK, mode << 5);
130 }
131
132 #ifdef CONFIG_PARPORT_PC_FIFO
133 /* Safely change the mode bits in the ECR
134 Returns:
135 0 : Success
136 -EBUSY: Could not drain FIFO in some finite amount of time,
137 mode not changed!
138 */
change_mode(struct parport * p,int m)139 static int change_mode(struct parport *p, int m)
140 {
141 const struct parport_pc_private *priv = p->physport->private_data;
142 unsigned char oecr;
143 int mode;
144
145 pr_debug("parport change_mode ECP-ISA to mode 0x%02x\n", m);
146
147 if (!priv->ecr) {
148 printk(KERN_DEBUG "change_mode: but there's no ECR!\n");
149 return 0;
150 }
151
152 /* Bits <7:5> contain the mode. */
153 oecr = inb(ECONTROL(p));
154 mode = (oecr >> 5) & 0x7;
155 if (mode == m)
156 return 0;
157
158 if (mode >= 2 && !(priv->ctr & 0x20)) {
159 /* This mode resets the FIFO, so we may
160 * have to wait for it to drain first. */
161 unsigned long expire = jiffies + p->physport->cad->timeout;
162 int counter;
163 switch (mode) {
164 case ECR_PPF: /* Parallel Port FIFO mode */
165 case ECR_ECP: /* ECP Parallel Port mode */
166 /* Busy wait for 200us */
167 for (counter = 0; counter < 40; counter++) {
168 if (inb(ECONTROL(p)) & 0x01)
169 break;
170 if (signal_pending(current))
171 break;
172 udelay(5);
173 }
174
175 /* Poll slowly. */
176 while (!(inb(ECONTROL(p)) & 0x01)) {
177 if (time_after_eq(jiffies, expire))
178 /* The FIFO is stuck. */
179 return -EBUSY;
180 schedule_timeout_interruptible(
181 msecs_to_jiffies(10));
182 if (signal_pending(current))
183 break;
184 }
185 }
186 }
187
188 if (mode >= 2 && m >= 2) {
189 /* We have to go through mode 001 */
190 oecr &= ~(7 << 5);
191 oecr |= ECR_PS2 << 5;
192 ECR_WRITE(p, oecr);
193 }
194
195 /* Set the mode. */
196 oecr &= ~(7 << 5);
197 oecr |= m << 5;
198 ECR_WRITE(p, oecr);
199 return 0;
200 }
201 #endif /* FIFO support */
202
203 /*
204 * Clear TIMEOUT BIT in EPP MODE
205 *
206 * This is also used in SPP detection.
207 */
clear_epp_timeout(struct parport * pb)208 static int clear_epp_timeout(struct parport *pb)
209 {
210 unsigned char r;
211
212 if (!(parport_pc_read_status(pb) & 0x01))
213 return 1;
214
215 /* To clear timeout some chips require double read */
216 parport_pc_read_status(pb);
217 r = parport_pc_read_status(pb);
218 outb(r | 0x01, STATUS(pb)); /* Some reset by writing 1 */
219 outb(r & 0xfe, STATUS(pb)); /* Others by writing 0 */
220 r = parport_pc_read_status(pb);
221
222 return !(r & 0x01);
223 }
224
225 /*
226 * Access functions.
227 *
228 * Most of these aren't static because they may be used by the
229 * parport_xxx_yyy macros. extern __inline__ versions of several
230 * of these are in parport_pc.h.
231 */
232
parport_pc_init_state(struct pardevice * dev,struct parport_state * s)233 static void parport_pc_init_state(struct pardevice *dev,
234 struct parport_state *s)
235 {
236 s->u.pc.ctr = 0xc;
237 if (dev->irq_func &&
238 dev->port->irq != PARPORT_IRQ_NONE)
239 /* Set ackIntEn */
240 s->u.pc.ctr |= 0x10;
241
242 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
243 * D.Gruszka VScom */
244 }
245
parport_pc_save_state(struct parport * p,struct parport_state * s)246 static void parport_pc_save_state(struct parport *p, struct parport_state *s)
247 {
248 const struct parport_pc_private *priv = p->physport->private_data;
249 s->u.pc.ctr = priv->ctr;
250 if (priv->ecr)
251 s->u.pc.ecr = inb(ECONTROL(p));
252 }
253
parport_pc_restore_state(struct parport * p,struct parport_state * s)254 static void parport_pc_restore_state(struct parport *p,
255 struct parport_state *s)
256 {
257 struct parport_pc_private *priv = p->physport->private_data;
258 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
259 outb(c, CONTROL(p));
260 priv->ctr = c;
261 if (priv->ecr)
262 ECR_WRITE(p, s->u.pc.ecr);
263 }
264
265 #ifdef CONFIG_PARPORT_1284
parport_pc_epp_read_data(struct parport * port,void * buf,size_t length,int flags)266 static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
267 size_t length, int flags)
268 {
269 size_t got = 0;
270
271 if (flags & PARPORT_W91284PIC) {
272 unsigned char status;
273 size_t left = length;
274
275 /* use knowledge about data lines..:
276 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
277 * pError is 1 if there are 16 bytes in the Warp's FIFO
278 */
279 status = inb(STATUS(port));
280
281 while (!(status & 0x08) && got < length) {
282 if (left >= 16 && (status & 0x20) && !(status & 0x08)) {
283 /* can grab 16 bytes from warp fifo */
284 if (!((long)buf & 0x03))
285 insl(EPPDATA(port), buf, 4);
286 else
287 insb(EPPDATA(port), buf, 16);
288 buf += 16;
289 got += 16;
290 left -= 16;
291 } else {
292 /* grab single byte from the warp fifo */
293 *((char *)buf) = inb(EPPDATA(port));
294 buf++;
295 got++;
296 left--;
297 }
298 status = inb(STATUS(port));
299 if (status & 0x01) {
300 /* EPP timeout should never occur... */
301 printk(KERN_DEBUG "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n",
302 port->name);
303 clear_epp_timeout(port);
304 }
305 }
306 return got;
307 }
308 if ((length > 1) && ((flags & PARPORT_EPP_FAST_32)
309 || flags & PARPORT_EPP_FAST_16
310 || flags & PARPORT_EPP_FAST_8)) {
311 if ((flags & PARPORT_EPP_FAST_32)
312 && !(((long)buf | length) & 0x03))
313 insl(EPPDATA(port), buf, (length >> 2));
314 else if ((flags & PARPORT_EPP_FAST_16)
315 && !(((long)buf | length) & 0x01))
316 insw(EPPDATA(port), buf, length >> 1);
317 else
318 insb(EPPDATA(port), buf, length);
319 if (inb(STATUS(port)) & 0x01) {
320 clear_epp_timeout(port);
321 return -EIO;
322 }
323 return length;
324 }
325 for (; got < length; got++) {
326 *((char *)buf) = inb(EPPDATA(port));
327 buf++;
328 if (inb(STATUS(port)) & 0x01) {
329 /* EPP timeout */
330 clear_epp_timeout(port);
331 break;
332 }
333 }
334
335 return got;
336 }
337
parport_pc_epp_write_data(struct parport * port,const void * buf,size_t length,int flags)338 static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
339 size_t length, int flags)
340 {
341 size_t written = 0;
342
343 if ((length > 1) && ((flags & PARPORT_EPP_FAST_32)
344 || flags & PARPORT_EPP_FAST_16
345 || flags & PARPORT_EPP_FAST_8)) {
346 if ((flags & PARPORT_EPP_FAST_32)
347 && !(((long)buf | length) & 0x03))
348 outsl(EPPDATA(port), buf, (length >> 2));
349 else if ((flags & PARPORT_EPP_FAST_16)
350 && !(((long)buf | length) & 0x01))
351 outsw(EPPDATA(port), buf, length >> 1);
352 else
353 outsb(EPPDATA(port), buf, length);
354 if (inb(STATUS(port)) & 0x01) {
355 clear_epp_timeout(port);
356 return -EIO;
357 }
358 return length;
359 }
360 for (; written < length; written++) {
361 outb(*((char *)buf), EPPDATA(port));
362 buf++;
363 if (inb(STATUS(port)) & 0x01) {
364 clear_epp_timeout(port);
365 break;
366 }
367 }
368
369 return written;
370 }
371
parport_pc_epp_read_addr(struct parport * port,void * buf,size_t length,int flags)372 static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
373 size_t length, int flags)
374 {
375 size_t got = 0;
376
377 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
378 insb(EPPADDR(port), buf, length);
379 if (inb(STATUS(port)) & 0x01) {
380 clear_epp_timeout(port);
381 return -EIO;
382 }
383 return length;
384 }
385 for (; got < length; got++) {
386 *((char *)buf) = inb(EPPADDR(port));
387 buf++;
388 if (inb(STATUS(port)) & 0x01) {
389 clear_epp_timeout(port);
390 break;
391 }
392 }
393
394 return got;
395 }
396
parport_pc_epp_write_addr(struct parport * port,const void * buf,size_t length,int flags)397 static size_t parport_pc_epp_write_addr(struct parport *port,
398 const void *buf, size_t length,
399 int flags)
400 {
401 size_t written = 0;
402
403 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
404 outsb(EPPADDR(port), buf, length);
405 if (inb(STATUS(port)) & 0x01) {
406 clear_epp_timeout(port);
407 return -EIO;
408 }
409 return length;
410 }
411 for (; written < length; written++) {
412 outb(*((char *)buf), EPPADDR(port));
413 buf++;
414 if (inb(STATUS(port)) & 0x01) {
415 clear_epp_timeout(port);
416 break;
417 }
418 }
419
420 return written;
421 }
422
parport_pc_ecpepp_read_data(struct parport * port,void * buf,size_t length,int flags)423 static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
424 size_t length, int flags)
425 {
426 size_t got;
427
428 frob_set_mode(port, ECR_EPP);
429 parport_pc_data_reverse(port);
430 parport_pc_write_control(port, 0x4);
431 got = parport_pc_epp_read_data(port, buf, length, flags);
432 frob_set_mode(port, ECR_PS2);
433
434 return got;
435 }
436
parport_pc_ecpepp_write_data(struct parport * port,const void * buf,size_t length,int flags)437 static size_t parport_pc_ecpepp_write_data(struct parport *port,
438 const void *buf, size_t length,
439 int flags)
440 {
441 size_t written;
442
443 frob_set_mode(port, ECR_EPP);
444 parport_pc_write_control(port, 0x4);
445 parport_pc_data_forward(port);
446 written = parport_pc_epp_write_data(port, buf, length, flags);
447 frob_set_mode(port, ECR_PS2);
448
449 return written;
450 }
451
parport_pc_ecpepp_read_addr(struct parport * port,void * buf,size_t length,int flags)452 static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
453 size_t length, int flags)
454 {
455 size_t got;
456
457 frob_set_mode(port, ECR_EPP);
458 parport_pc_data_reverse(port);
459 parport_pc_write_control(port, 0x4);
460 got = parport_pc_epp_read_addr(port, buf, length, flags);
461 frob_set_mode(port, ECR_PS2);
462
463 return got;
464 }
465
parport_pc_ecpepp_write_addr(struct parport * port,const void * buf,size_t length,int flags)466 static size_t parport_pc_ecpepp_write_addr(struct parport *port,
467 const void *buf, size_t length,
468 int flags)
469 {
470 size_t written;
471
472 frob_set_mode(port, ECR_EPP);
473 parport_pc_write_control(port, 0x4);
474 parport_pc_data_forward(port);
475 written = parport_pc_epp_write_addr(port, buf, length, flags);
476 frob_set_mode(port, ECR_PS2);
477
478 return written;
479 }
480 #endif /* IEEE 1284 support */
481
482 #ifdef CONFIG_PARPORT_PC_FIFO
parport_pc_fifo_write_block_pio(struct parport * port,const void * buf,size_t length)483 static size_t parport_pc_fifo_write_block_pio(struct parport *port,
484 const void *buf, size_t length)
485 {
486 int ret = 0;
487 const unsigned char *bufp = buf;
488 size_t left = length;
489 unsigned long expire = jiffies + port->physport->cad->timeout;
490 const unsigned long fifo = FIFO(port);
491 int poll_for = 8; /* 80 usecs */
492 const struct parport_pc_private *priv = port->physport->private_data;
493 const int fifo_depth = priv->fifo_depth;
494
495 port = port->physport;
496
497 /* We don't want to be interrupted every character. */
498 parport_pc_disable_irq(port);
499 /* set nErrIntrEn and serviceIntr */
500 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
501
502 /* Forward mode. */
503 parport_pc_data_forward(port); /* Must be in PS2 mode */
504
505 while (left) {
506 unsigned char byte;
507 unsigned char ecrval = inb(ECONTROL(port));
508 int i = 0;
509
510 if (need_resched() && time_before(jiffies, expire))
511 /* Can't yield the port. */
512 schedule();
513
514 /* Anyone else waiting for the port? */
515 if (port->waithead) {
516 printk(KERN_DEBUG "Somebody wants the port\n");
517 break;
518 }
519
520 if (ecrval & 0x02) {
521 /* FIFO is full. Wait for interrupt. */
522
523 /* Clear serviceIntr */
524 ECR_WRITE(port, ecrval & ~(1<<2));
525 false_alarm:
526 ret = parport_wait_event(port, HZ);
527 if (ret < 0)
528 break;
529 ret = 0;
530 if (!time_before(jiffies, expire)) {
531 /* Timed out. */
532 printk(KERN_DEBUG "FIFO write timed out\n");
533 break;
534 }
535 ecrval = inb(ECONTROL(port));
536 if (!(ecrval & (1<<2))) {
537 if (need_resched() &&
538 time_before(jiffies, expire))
539 schedule();
540
541 goto false_alarm;
542 }
543
544 continue;
545 }
546
547 /* Can't fail now. */
548 expire = jiffies + port->cad->timeout;
549
550 poll:
551 if (signal_pending(current))
552 break;
553
554 if (ecrval & 0x01) {
555 /* FIFO is empty. Blast it full. */
556 const int n = left < fifo_depth ? left : fifo_depth;
557 outsb(fifo, bufp, n);
558 bufp += n;
559 left -= n;
560
561 /* Adjust the poll time. */
562 if (i < (poll_for - 2))
563 poll_for--;
564 continue;
565 } else if (i++ < poll_for) {
566 udelay(10);
567 ecrval = inb(ECONTROL(port));
568 goto poll;
569 }
570
571 /* Half-full(call me an optimist) */
572 byte = *bufp++;
573 outb(byte, fifo);
574 left--;
575 }
576 dump_parport_state("leave fifo_write_block_pio", port);
577 return length - left;
578 }
579
580 #ifdef HAS_DMA
parport_pc_fifo_write_block_dma(struct parport * port,const void * buf,size_t length)581 static size_t parport_pc_fifo_write_block_dma(struct parport *port,
582 const void *buf, size_t length)
583 {
584 int ret = 0;
585 unsigned long dmaflag;
586 size_t left = length;
587 const struct parport_pc_private *priv = port->physport->private_data;
588 struct device *dev = port->physport->dev;
589 dma_addr_t dma_addr, dma_handle;
590 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
591 unsigned long start = (unsigned long) buf;
592 unsigned long end = (unsigned long) buf + length - 1;
593
594 dump_parport_state("enter fifo_write_block_dma", port);
595 if (end < MAX_DMA_ADDRESS) {
596 /* If it would cross a 64k boundary, cap it at the end. */
597 if ((start ^ end) & ~0xffffUL)
598 maxlen = 0x10000 - (start & 0xffff);
599
600 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
601 DMA_TO_DEVICE);
602 } else {
603 /* above 16 MB we use a bounce buffer as ISA-DMA
604 is not possible */
605 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
606 dma_addr = priv->dma_handle;
607 dma_handle = 0;
608 }
609
610 port = port->physport;
611
612 /* We don't want to be interrupted every character. */
613 parport_pc_disable_irq(port);
614 /* set nErrIntrEn and serviceIntr */
615 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
616
617 /* Forward mode. */
618 parport_pc_data_forward(port); /* Must be in PS2 mode */
619
620 while (left) {
621 unsigned long expire = jiffies + port->physport->cad->timeout;
622
623 size_t count = left;
624
625 if (count > maxlen)
626 count = maxlen;
627
628 if (!dma_handle) /* bounce buffer ! */
629 memcpy(priv->dma_buf, buf, count);
630
631 dmaflag = claim_dma_lock();
632 disable_dma(port->dma);
633 clear_dma_ff(port->dma);
634 set_dma_mode(port->dma, DMA_MODE_WRITE);
635 set_dma_addr(port->dma, dma_addr);
636 set_dma_count(port->dma, count);
637
638 /* Set DMA mode */
639 frob_econtrol(port, 1<<3, 1<<3);
640
641 /* Clear serviceIntr */
642 frob_econtrol(port, 1<<2, 0);
643
644 enable_dma(port->dma);
645 release_dma_lock(dmaflag);
646
647 /* assume DMA will be successful */
648 left -= count;
649 buf += count;
650 if (dma_handle)
651 dma_addr += count;
652
653 /* Wait for interrupt. */
654 false_alarm:
655 ret = parport_wait_event(port, HZ);
656 if (ret < 0)
657 break;
658 ret = 0;
659 if (!time_before(jiffies, expire)) {
660 /* Timed out. */
661 printk(KERN_DEBUG "DMA write timed out\n");
662 break;
663 }
664 /* Is serviceIntr set? */
665 if (!(inb(ECONTROL(port)) & (1<<2))) {
666 cond_resched();
667
668 goto false_alarm;
669 }
670
671 dmaflag = claim_dma_lock();
672 disable_dma(port->dma);
673 clear_dma_ff(port->dma);
674 count = get_dma_residue(port->dma);
675 release_dma_lock(dmaflag);
676
677 cond_resched(); /* Can't yield the port. */
678
679 /* Anyone else waiting for the port? */
680 if (port->waithead) {
681 printk(KERN_DEBUG "Somebody wants the port\n");
682 break;
683 }
684
685 /* update for possible DMA residue ! */
686 buf -= count;
687 left += count;
688 if (dma_handle)
689 dma_addr -= count;
690 }
691
692 /* Maybe got here through break, so adjust for DMA residue! */
693 dmaflag = claim_dma_lock();
694 disable_dma(port->dma);
695 clear_dma_ff(port->dma);
696 left += get_dma_residue(port->dma);
697 release_dma_lock(dmaflag);
698
699 /* Turn off DMA mode */
700 frob_econtrol(port, 1<<3, 0);
701
702 if (dma_handle)
703 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
704
705 dump_parport_state("leave fifo_write_block_dma", port);
706 return length - left;
707 }
708 #endif
709
parport_pc_fifo_write_block(struct parport * port,const void * buf,size_t length)710 static inline size_t parport_pc_fifo_write_block(struct parport *port,
711 const void *buf, size_t length)
712 {
713 #ifdef HAS_DMA
714 if (port->dma != PARPORT_DMA_NONE)
715 return parport_pc_fifo_write_block_dma(port, buf, length);
716 #endif
717 return parport_pc_fifo_write_block_pio(port, buf, length);
718 }
719
720 /* Parallel Port FIFO mode (ECP chipsets) */
parport_pc_compat_write_block_pio(struct parport * port,const void * buf,size_t length,int flags)721 static size_t parport_pc_compat_write_block_pio(struct parport *port,
722 const void *buf, size_t length,
723 int flags)
724 {
725 size_t written;
726 int r;
727 unsigned long expire;
728 const struct parport_pc_private *priv = port->physport->private_data;
729
730 /* Special case: a timeout of zero means we cannot call schedule().
731 * Also if O_NONBLOCK is set then use the default implementation. */
732 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
733 return parport_ieee1284_write_compat(port, buf,
734 length, flags);
735
736 /* Set up parallel port FIFO mode.*/
737 parport_pc_data_forward(port); /* Must be in PS2 mode */
738 parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0);
739 r = change_mode(port, ECR_PPF); /* Parallel port FIFO */
740 if (r)
741 printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
742 port->name);
743
744 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
745
746 /* Write the data to the FIFO. */
747 written = parport_pc_fifo_write_block(port, buf, length);
748
749 /* Finish up. */
750 /* For some hardware we don't want to touch the mode until
751 * the FIFO is empty, so allow 4 seconds for each position
752 * in the fifo.
753 */
754 expire = jiffies + (priv->fifo_depth * HZ * 4);
755 do {
756 /* Wait for the FIFO to empty */
757 r = change_mode(port, ECR_PS2);
758 if (r != -EBUSY)
759 break;
760 } while (time_before(jiffies, expire));
761 if (r == -EBUSY) {
762
763 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
764
765 /* Prevent further data transfer. */
766 frob_set_mode(port, ECR_TST);
767
768 /* Adjust for the contents of the FIFO. */
769 for (written -= priv->fifo_depth; ; written++) {
770 if (inb(ECONTROL(port)) & 0x2) {
771 /* Full up. */
772 break;
773 }
774 outb(0, FIFO(port));
775 }
776
777 /* Reset the FIFO and return to PS2 mode. */
778 frob_set_mode(port, ECR_PS2);
779 }
780
781 r = parport_wait_peripheral(port,
782 PARPORT_STATUS_BUSY,
783 PARPORT_STATUS_BUSY);
784 if (r)
785 printk(KERN_DEBUG "%s: BUSY timeout (%d) in compat_write_block_pio\n",
786 port->name, r);
787
788 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
789
790 return written;
791 }
792
793 /* ECP */
794 #ifdef CONFIG_PARPORT_1284
parport_pc_ecp_write_block_pio(struct parport * port,const void * buf,size_t length,int flags)795 static size_t parport_pc_ecp_write_block_pio(struct parport *port,
796 const void *buf, size_t length,
797 int flags)
798 {
799 size_t written;
800 int r;
801 unsigned long expire;
802 const struct parport_pc_private *priv = port->physport->private_data;
803
804 /* Special case: a timeout of zero means we cannot call schedule().
805 * Also if O_NONBLOCK is set then use the default implementation. */
806 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
807 return parport_ieee1284_ecp_write_data(port, buf,
808 length, flags);
809
810 /* Switch to forward mode if necessary. */
811 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
812 /* Event 47: Set nInit high. */
813 parport_frob_control(port,
814 PARPORT_CONTROL_INIT
815 | PARPORT_CONTROL_AUTOFD,
816 PARPORT_CONTROL_INIT
817 | PARPORT_CONTROL_AUTOFD);
818
819 /* Event 49: PError goes high. */
820 r = parport_wait_peripheral(port,
821 PARPORT_STATUS_PAPEROUT,
822 PARPORT_STATUS_PAPEROUT);
823 if (r) {
824 printk(KERN_DEBUG "%s: PError timeout (%d) in ecp_write_block_pio\n",
825 port->name, r);
826 }
827 }
828
829 /* Set up ECP parallel port mode.*/
830 parport_pc_data_forward(port); /* Must be in PS2 mode */
831 parport_pc_frob_control(port,
832 PARPORT_CONTROL_STROBE |
833 PARPORT_CONTROL_AUTOFD,
834 0);
835 r = change_mode(port, ECR_ECP); /* ECP FIFO */
836 if (r)
837 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
838 port->name);
839 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
840
841 /* Write the data to the FIFO. */
842 written = parport_pc_fifo_write_block(port, buf, length);
843
844 /* Finish up. */
845 /* For some hardware we don't want to touch the mode until
846 * the FIFO is empty, so allow 4 seconds for each position
847 * in the fifo.
848 */
849 expire = jiffies + (priv->fifo_depth * (HZ * 4));
850 do {
851 /* Wait for the FIFO to empty */
852 r = change_mode(port, ECR_PS2);
853 if (r != -EBUSY)
854 break;
855 } while (time_before(jiffies, expire));
856 if (r == -EBUSY) {
857
858 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
859
860 /* Prevent further data transfer. */
861 frob_set_mode(port, ECR_TST);
862
863 /* Adjust for the contents of the FIFO. */
864 for (written -= priv->fifo_depth; ; written++) {
865 if (inb(ECONTROL(port)) & 0x2) {
866 /* Full up. */
867 break;
868 }
869 outb(0, FIFO(port));
870 }
871
872 /* Reset the FIFO and return to PS2 mode. */
873 frob_set_mode(port, ECR_PS2);
874
875 /* Host transfer recovery. */
876 parport_pc_data_reverse(port); /* Must be in PS2 mode */
877 udelay(5);
878 parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
879 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
880 if (r)
881 printk(KERN_DEBUG "%s: PE,1 timeout (%d) in ecp_write_block_pio\n",
882 port->name, r);
883
884 parport_frob_control(port,
885 PARPORT_CONTROL_INIT,
886 PARPORT_CONTROL_INIT);
887 r = parport_wait_peripheral(port,
888 PARPORT_STATUS_PAPEROUT,
889 PARPORT_STATUS_PAPEROUT);
890 if (r)
891 printk(KERN_DEBUG "%s: PE,2 timeout (%d) in ecp_write_block_pio\n",
892 port->name, r);
893 }
894
895 r = parport_wait_peripheral(port,
896 PARPORT_STATUS_BUSY,
897 PARPORT_STATUS_BUSY);
898 if (r)
899 printk(KERN_DEBUG "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
900 port->name, r);
901
902 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
903
904 return written;
905 }
906 #endif /* IEEE 1284 support */
907 #endif /* Allowed to use FIFO/DMA */
908
909
910 /*
911 * ******************************************
912 * INITIALISATION AND MODULE STUFF BELOW HERE
913 * ******************************************
914 */
915
916 /* GCC is not inlining extern inline function later overwritten to non-inline,
917 so we use outlined_ variants here. */
918 static const struct parport_operations parport_pc_ops = {
919 .write_data = parport_pc_write_data,
920 .read_data = parport_pc_read_data,
921
922 .write_control = parport_pc_write_control,
923 .read_control = parport_pc_read_control,
924 .frob_control = parport_pc_frob_control,
925
926 .read_status = parport_pc_read_status,
927
928 .enable_irq = parport_pc_enable_irq,
929 .disable_irq = parport_pc_disable_irq,
930
931 .data_forward = parport_pc_data_forward,
932 .data_reverse = parport_pc_data_reverse,
933
934 .init_state = parport_pc_init_state,
935 .save_state = parport_pc_save_state,
936 .restore_state = parport_pc_restore_state,
937
938 .epp_write_data = parport_ieee1284_epp_write_data,
939 .epp_read_data = parport_ieee1284_epp_read_data,
940 .epp_write_addr = parport_ieee1284_epp_write_addr,
941 .epp_read_addr = parport_ieee1284_epp_read_addr,
942
943 .ecp_write_data = parport_ieee1284_ecp_write_data,
944 .ecp_read_data = parport_ieee1284_ecp_read_data,
945 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
946
947 .compat_write_data = parport_ieee1284_write_compat,
948 .nibble_read_data = parport_ieee1284_read_nibble,
949 .byte_read_data = parport_ieee1284_read_byte,
950
951 .owner = THIS_MODULE,
952 };
953
954 #ifdef CONFIG_PARPORT_PC_SUPERIO
955
find_free_superio(void)956 static struct superio_struct *find_free_superio(void)
957 {
958 int i;
959 for (i = 0; i < NR_SUPERIOS; i++)
960 if (superios[i].io == 0)
961 return &superios[i];
962 return NULL;
963 }
964
965
966 /* Super-IO chipset detection, Winbond, SMSC */
show_parconfig_smsc37c669(int io,int key)967 static void show_parconfig_smsc37c669(int io, int key)
968 {
969 int cr1, cr4, cra, cr23, cr26, cr27;
970 struct superio_struct *s;
971
972 static const char *const modes[] = {
973 "SPP and Bidirectional (PS/2)",
974 "EPP and SPP",
975 "ECP",
976 "ECP and EPP" };
977
978 outb(key, io);
979 outb(key, io);
980 outb(1, io);
981 cr1 = inb(io + 1);
982 outb(4, io);
983 cr4 = inb(io + 1);
984 outb(0x0a, io);
985 cra = inb(io + 1);
986 outb(0x23, io);
987 cr23 = inb(io + 1);
988 outb(0x26, io);
989 cr26 = inb(io + 1);
990 outb(0x27, io);
991 cr27 = inb(io + 1);
992 outb(0xaa, io);
993
994 if (verbose_probing) {
995 pr_info("SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
996 cr1, cr4, cra, cr23, cr26, cr27);
997
998 /* The documentation calls DMA and IRQ-Lines by letters, so
999 the board maker can/will wire them
1000 appropriately/randomly... G=reserved H=IDE-irq, */
1001 pr_info("SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n",
1002 cr23 * 4,
1003 (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
1004 (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-',
1005 cra & 0x0f);
1006 pr_info("SMSC LPT Config: enabled=%s power=%s\n",
1007 (cr23 * 4 >= 0x100) ? "yes" : "no",
1008 (cr1 & 4) ? "yes" : "no");
1009 pr_info("SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1010 (cr1 & 0x08) ? "Standard mode only (SPP)"
1011 : modes[cr4 & 0x03],
1012 (cr4 & 0x40) ? "1.7" : "1.9");
1013 }
1014
1015 /* Heuristics ! BIOS setup for this mainboard device limits
1016 the choices to standard settings, i.e. io-address and IRQ
1017 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1018 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1019 if (cr23 * 4 >= 0x100) { /* if active */
1020 s = find_free_superio();
1021 if (s == NULL)
1022 pr_info("Super-IO: too many chips!\n");
1023 else {
1024 int d;
1025 switch (cr23 * 4) {
1026 case 0x3bc:
1027 s->io = 0x3bc;
1028 s->irq = 7;
1029 break;
1030 case 0x378:
1031 s->io = 0x378;
1032 s->irq = 7;
1033 break;
1034 case 0x278:
1035 s->io = 0x278;
1036 s->irq = 5;
1037 }
1038 d = (cr26 & 0x0f);
1039 if (d == 1 || d == 3)
1040 s->dma = d;
1041 else
1042 s->dma = PARPORT_DMA_NONE;
1043 }
1044 }
1045 }
1046
1047
show_parconfig_winbond(int io,int key)1048 static void show_parconfig_winbond(int io, int key)
1049 {
1050 int cr30, cr60, cr61, cr70, cr74, crf0;
1051 struct superio_struct *s;
1052 static const char *const modes[] = {
1053 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1054 "EPP-1.9 and SPP",
1055 "ECP",
1056 "ECP and EPP-1.9",
1057 "Standard (SPP)",
1058 "EPP-1.7 and SPP", /* 5 */
1059 "undefined!",
1060 "ECP and EPP-1.7" };
1061 static char *const irqtypes[] = {
1062 "pulsed low, high-Z",
1063 "follows nACK" };
1064
1065 /* The registers are called compatible-PnP because the
1066 register layout is modelled after ISA-PnP, the access
1067 method is just another ... */
1068 outb(key, io);
1069 outb(key, io);
1070 outb(0x07, io); /* Register 7: Select Logical Device */
1071 outb(0x01, io + 1); /* LD1 is Parallel Port */
1072 outb(0x30, io);
1073 cr30 = inb(io + 1);
1074 outb(0x60, io);
1075 cr60 = inb(io + 1);
1076 outb(0x61, io);
1077 cr61 = inb(io + 1);
1078 outb(0x70, io);
1079 cr70 = inb(io + 1);
1080 outb(0x74, io);
1081 cr74 = inb(io + 1);
1082 outb(0xf0, io);
1083 crf0 = inb(io + 1);
1084 outb(0xaa, io);
1085
1086 if (verbose_probing) {
1087 pr_info("Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n",
1088 cr30, cr60, cr61, cr70, cr74, crf0);
1089 pr_info("Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1090 (cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f);
1091 if ((cr74 & 0x07) > 3)
1092 pr_cont("dma=none\n");
1093 else
1094 pr_cont("dma=%d\n", cr74 & 0x07);
1095 pr_info("Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1096 irqtypes[crf0 >> 7], (crf0 >> 3) & 0x0f);
1097 pr_info("Winbond LPT Config: Port mode=%s\n",
1098 modes[crf0 & 0x07]);
1099 }
1100
1101 if (cr30 & 0x01) { /* the settings can be interrogated later ... */
1102 s = find_free_superio();
1103 if (s == NULL)
1104 pr_info("Super-IO: too many chips!\n");
1105 else {
1106 s->io = (cr60 << 8) | cr61;
1107 s->irq = cr70 & 0x0f;
1108 s->dma = (((cr74 & 0x07) > 3) ?
1109 PARPORT_DMA_NONE : (cr74 & 0x07));
1110 }
1111 }
1112 }
1113
decode_winbond(int efer,int key,int devid,int devrev,int oldid)1114 static void decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1115 {
1116 const char *type = "unknown";
1117 int id, progif = 2;
1118
1119 if (devid == devrev)
1120 /* simple heuristics, we happened to read some
1121 non-winbond register */
1122 return;
1123
1124 id = (devid << 8) | devrev;
1125
1126 /* Values are from public data sheets pdf files, I can just
1127 confirm 83977TF is correct :-) */
1128 if (id == 0x9771)
1129 type = "83977F/AF";
1130 else if (id == 0x9773)
1131 type = "83977TF / SMSC 97w33x/97w34x";
1132 else if (id == 0x9774)
1133 type = "83977ATF";
1134 else if ((id & ~0x0f) == 0x5270)
1135 type = "83977CTF / SMSC 97w36x";
1136 else if ((id & ~0x0f) == 0x52f0)
1137 type = "83977EF / SMSC 97w35x";
1138 else if ((id & ~0x0f) == 0x5210)
1139 type = "83627";
1140 else if ((id & ~0x0f) == 0x6010)
1141 type = "83697HF";
1142 else if ((oldid & 0x0f) == 0x0a) {
1143 type = "83877F";
1144 progif = 1;
1145 } else if ((oldid & 0x0f) == 0x0b) {
1146 type = "83877AF";
1147 progif = 1;
1148 } else if ((oldid & 0x0f) == 0x0c) {
1149 type = "83877TF";
1150 progif = 1;
1151 } else if ((oldid & 0x0f) == 0x0d) {
1152 type = "83877ATF";
1153 progif = 1;
1154 } else
1155 progif = 0;
1156
1157 if (verbose_probing)
1158 pr_info("Winbond chip at EFER=0x%x key=0x%02x devid=%02x devrev=%02x oldid=%02x type=%s\n",
1159 efer, key, devid, devrev, oldid, type);
1160
1161 if (progif == 2)
1162 show_parconfig_winbond(efer, key);
1163 }
1164
decode_smsc(int efer,int key,int devid,int devrev)1165 static void decode_smsc(int efer, int key, int devid, int devrev)
1166 {
1167 const char *type = "unknown";
1168 void (*func)(int io, int key);
1169 int id;
1170
1171 if (devid == devrev)
1172 /* simple heuristics, we happened to read some
1173 non-smsc register */
1174 return;
1175
1176 func = NULL;
1177 id = (devid << 8) | devrev;
1178
1179 if (id == 0x0302) {
1180 type = "37c669";
1181 func = show_parconfig_smsc37c669;
1182 } else if (id == 0x6582)
1183 type = "37c665IR";
1184 else if (devid == 0x65)
1185 type = "37c665GT";
1186 else if (devid == 0x66)
1187 type = "37c666GT";
1188
1189 if (verbose_probing)
1190 pr_info("SMSC chip at EFER=0x%x key=0x%02x devid=%02x devrev=%02x type=%s\n",
1191 efer, key, devid, devrev, type);
1192
1193 if (func)
1194 func(efer, key);
1195 }
1196
1197
winbond_check(int io,int key)1198 static void winbond_check(int io, int key)
1199 {
1200 int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1201
1202 if (!request_region(io, 3, __func__))
1203 return;
1204
1205 origval = inb(io); /* Save original value */
1206
1207 /* First probe without key */
1208 outb(0x20, io);
1209 x_devid = inb(io + 1);
1210 outb(0x21, io);
1211 x_devrev = inb(io + 1);
1212 outb(0x09, io);
1213 x_oldid = inb(io + 1);
1214
1215 outb(key, io);
1216 outb(key, io); /* Write Magic Sequence to EFER, extended
1217 function enable register */
1218 outb(0x20, io); /* Write EFIR, extended function index register */
1219 devid = inb(io + 1); /* Read EFDR, extended function data register */
1220 outb(0x21, io);
1221 devrev = inb(io + 1);
1222 outb(0x09, io);
1223 oldid = inb(io + 1);
1224 outb(0xaa, io); /* Magic Seal */
1225
1226 outb(origval, io); /* in case we poked some entirely different hardware */
1227
1228 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1229 goto out; /* protection against false positives */
1230
1231 decode_winbond(io, key, devid, devrev, oldid);
1232 out:
1233 release_region(io, 3);
1234 }
1235
winbond_check2(int io,int key)1236 static void winbond_check2(int io, int key)
1237 {
1238 int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1239
1240 if (!request_region(io, 3, __func__))
1241 return;
1242
1243 origval[0] = inb(io); /* Save original values */
1244 origval[1] = inb(io + 1);
1245 origval[2] = inb(io + 2);
1246
1247 /* First probe without the key */
1248 outb(0x20, io + 2);
1249 x_devid = inb(io + 2);
1250 outb(0x21, io + 1);
1251 x_devrev = inb(io + 2);
1252 outb(0x09, io + 1);
1253 x_oldid = inb(io + 2);
1254
1255 outb(key, io); /* Write Magic Byte to EFER, extended
1256 function enable register */
1257 outb(0x20, io + 2); /* Write EFIR, extended function index register */
1258 devid = inb(io + 2); /* Read EFDR, extended function data register */
1259 outb(0x21, io + 1);
1260 devrev = inb(io + 2);
1261 outb(0x09, io + 1);
1262 oldid = inb(io + 2);
1263 outb(0xaa, io); /* Magic Seal */
1264
1265 outb(origval[0], io); /* in case we poked some entirely different hardware */
1266 outb(origval[1], io + 1);
1267 outb(origval[2], io + 2);
1268
1269 if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
1270 goto out; /* protection against false positives */
1271
1272 decode_winbond(io, key, devid, devrev, oldid);
1273 out:
1274 release_region(io, 3);
1275 }
1276
smsc_check(int io,int key)1277 static void smsc_check(int io, int key)
1278 {
1279 int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
1280
1281 if (!request_region(io, 3, __func__))
1282 return;
1283
1284 origval = inb(io); /* Save original value */
1285
1286 /* First probe without the key */
1287 outb(0x0d, io);
1288 x_oldid = inb(io + 1);
1289 outb(0x0e, io);
1290 x_oldrev = inb(io + 1);
1291 outb(0x20, io);
1292 x_id = inb(io + 1);
1293 outb(0x21, io);
1294 x_rev = inb(io + 1);
1295
1296 outb(key, io);
1297 outb(key, io); /* Write Magic Sequence to EFER, extended
1298 function enable register */
1299 outb(0x0d, io); /* Write EFIR, extended function index register */
1300 oldid = inb(io + 1); /* Read EFDR, extended function data register */
1301 outb(0x0e, io);
1302 oldrev = inb(io + 1);
1303 outb(0x20, io);
1304 id = inb(io + 1);
1305 outb(0x21, io);
1306 rev = inb(io + 1);
1307 outb(0xaa, io); /* Magic Seal */
1308
1309 outb(origval, io); /* in case we poked some entirely different hardware */
1310
1311 if (x_id == id && x_oldrev == oldrev &&
1312 x_oldid == oldid && x_rev == rev)
1313 goto out; /* protection against false positives */
1314
1315 decode_smsc(io, key, oldid, oldrev);
1316 out:
1317 release_region(io, 3);
1318 }
1319
1320
detect_and_report_winbond(void)1321 static void detect_and_report_winbond(void)
1322 {
1323 if (verbose_probing)
1324 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1325 winbond_check(0x3f0, 0x87);
1326 winbond_check(0x370, 0x87);
1327 winbond_check(0x2e , 0x87);
1328 winbond_check(0x4e , 0x87);
1329 winbond_check(0x3f0, 0x86);
1330 winbond_check2(0x250, 0x88);
1331 winbond_check2(0x250, 0x89);
1332 }
1333
detect_and_report_smsc(void)1334 static void detect_and_report_smsc(void)
1335 {
1336 if (verbose_probing)
1337 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1338 smsc_check(0x3f0, 0x55);
1339 smsc_check(0x370, 0x55);
1340 smsc_check(0x3f0, 0x44);
1341 smsc_check(0x370, 0x44);
1342 }
1343
detect_and_report_it87(void)1344 static void detect_and_report_it87(void)
1345 {
1346 u16 dev;
1347 u8 origval, r;
1348 if (verbose_probing)
1349 printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
1350 if (!request_muxed_region(0x2e, 2, __func__))
1351 return;
1352 origval = inb(0x2e); /* Save original value */
1353 outb(0x87, 0x2e);
1354 outb(0x01, 0x2e);
1355 outb(0x55, 0x2e);
1356 outb(0x55, 0x2e);
1357 outb(0x20, 0x2e);
1358 dev = inb(0x2f) << 8;
1359 outb(0x21, 0x2e);
1360 dev |= inb(0x2f);
1361 if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 ||
1362 dev == 0x8716 || dev == 0x8718 || dev == 0x8726) {
1363 pr_info("IT%04X SuperIO detected\n", dev);
1364 outb(0x07, 0x2E); /* Parallel Port */
1365 outb(0x03, 0x2F);
1366 outb(0xF0, 0x2E); /* BOOT 0x80 off */
1367 r = inb(0x2f);
1368 outb(0xF0, 0x2E);
1369 outb(r | 8, 0x2F);
1370 outb(0x02, 0x2E); /* Lock */
1371 outb(0x02, 0x2F);
1372 } else {
1373 outb(origval, 0x2e); /* Oops, sorry to disturb */
1374 }
1375 release_region(0x2e, 2);
1376 }
1377 #endif /* CONFIG_PARPORT_PC_SUPERIO */
1378
find_superio(struct parport * p)1379 static struct superio_struct *find_superio(struct parport *p)
1380 {
1381 int i;
1382 for (i = 0; i < NR_SUPERIOS; i++)
1383 if (superios[i].io == p->base)
1384 return &superios[i];
1385 return NULL;
1386 }
1387
get_superio_dma(struct parport * p)1388 static int get_superio_dma(struct parport *p)
1389 {
1390 struct superio_struct *s = find_superio(p);
1391 if (s)
1392 return s->dma;
1393 return PARPORT_DMA_NONE;
1394 }
1395
get_superio_irq(struct parport * p)1396 static int get_superio_irq(struct parport *p)
1397 {
1398 struct superio_struct *s = find_superio(p);
1399 if (s)
1400 return s->irq;
1401 return PARPORT_IRQ_NONE;
1402 }
1403
1404
1405 /* --- Mode detection ------------------------------------- */
1406
1407 /*
1408 * Checks for port existence, all ports support SPP MODE
1409 * Returns:
1410 * 0 : No parallel port at this address
1411 * PARPORT_MODE_PCSPP : SPP port detected
1412 * (if the user specified an ioport himself,
1413 * this shall always be the case!)
1414 *
1415 */
parport_SPP_supported(struct parport * pb)1416 static int parport_SPP_supported(struct parport *pb)
1417 {
1418 unsigned char r, w;
1419
1420 /*
1421 * first clear an eventually pending EPP timeout
1422 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1423 * that does not even respond to SPP cycles if an EPP
1424 * timeout is pending
1425 */
1426 clear_epp_timeout(pb);
1427
1428 /* Do a simple read-write test to make sure the port exists. */
1429 w = 0xc;
1430 outb(w, CONTROL(pb));
1431
1432 /* Is there a control register that we can read from? Some
1433 * ports don't allow reads, so read_control just returns a
1434 * software copy. Some ports _do_ allow reads, so bypass the
1435 * software copy here. In addition, some bits aren't
1436 * writable. */
1437 r = inb(CONTROL(pb));
1438 if ((r & 0xf) == w) {
1439 w = 0xe;
1440 outb(w, CONTROL(pb));
1441 r = inb(CONTROL(pb));
1442 outb(0xc, CONTROL(pb));
1443 if ((r & 0xf) == w)
1444 return PARPORT_MODE_PCSPP;
1445 }
1446
1447 if (user_specified)
1448 /* That didn't work, but the user thinks there's a
1449 * port here. */
1450 pr_info("parport 0x%lx (WARNING): CTR: wrote 0x%02x, read 0x%02x\n",
1451 pb->base, w, r);
1452
1453 /* Try the data register. The data lines aren't tri-stated at
1454 * this stage, so we expect back what we wrote. */
1455 w = 0xaa;
1456 parport_pc_write_data(pb, w);
1457 r = parport_pc_read_data(pb);
1458 if (r == w) {
1459 w = 0x55;
1460 parport_pc_write_data(pb, w);
1461 r = parport_pc_read_data(pb);
1462 if (r == w)
1463 return PARPORT_MODE_PCSPP;
1464 }
1465
1466 if (user_specified) {
1467 /* Didn't work, but the user is convinced this is the
1468 * place. */
1469 pr_info("parport 0x%lx (WARNING): DATA: wrote 0x%02x, read 0x%02x\n",
1470 pb->base, w, r);
1471 pr_info("parport 0x%lx: You gave this address, but there is probably no parallel port there!\n",
1472 pb->base);
1473 }
1474
1475 /* It's possible that we can't read the control register or
1476 * the data register. In that case just believe the user. */
1477 if (user_specified)
1478 return PARPORT_MODE_PCSPP;
1479
1480 return 0;
1481 }
1482
1483 /* Check for ECR
1484 *
1485 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1486 * on these cards actually accesses the CTR.
1487 *
1488 * Modern cards don't do this but reading from ECR will return 0xff
1489 * regardless of what is written here if the card does NOT support
1490 * ECP.
1491 *
1492 * We first check to see if ECR is the same as CTR. If not, the low
1493 * two bits of ECR aren't writable, so we check by writing ECR and
1494 * reading it back to see if it's what we expect.
1495 */
parport_ECR_present(struct parport * pb)1496 static int parport_ECR_present(struct parport *pb)
1497 {
1498 struct parport_pc_private *priv = pb->private_data;
1499 unsigned char r = 0xc;
1500
1501 if (!priv->ecr_writable) {
1502 outb(r, CONTROL(pb));
1503 if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) {
1504 outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */
1505
1506 r = inb(CONTROL(pb));
1507 if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
1508 /* Sure that no ECR register exists */
1509 goto no_reg;
1510 }
1511
1512 if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
1513 goto no_reg;
1514
1515 ECR_WRITE(pb, 0x34);
1516 if (inb(ECONTROL(pb)) != 0x35)
1517 goto no_reg;
1518 }
1519
1520 priv->ecr = 1;
1521 outb(0xc, CONTROL(pb));
1522
1523 /* Go to mode 000 */
1524 frob_set_mode(pb, ECR_SPP);
1525
1526 return 1;
1527
1528 no_reg:
1529 outb(0xc, CONTROL(pb));
1530 return 0;
1531 }
1532
1533 #ifdef CONFIG_PARPORT_1284
1534 /* Detect PS/2 support.
1535 *
1536 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1537 * allows us to read data from the data lines. In theory we would get back
1538 * 0xff but any peripheral attached to the port may drag some or all of the
1539 * lines down to zero. So if we get back anything that isn't the contents
1540 * of the data register we deem PS/2 support to be present.
1541 *
1542 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1543 * drivers, but an external peripheral with sufficiently beefy drivers of
1544 * its own can overpower them and assert its own levels onto the bus, from
1545 * where they can then be read back as normal. Ports with this property
1546 * and the right type of device attached are likely to fail the SPP test,
1547 * (as they will appear to have stuck bits) and so the fact that they might
1548 * be misdetected here is rather academic.
1549 */
1550
parport_PS2_supported(struct parport * pb)1551 static int parport_PS2_supported(struct parport *pb)
1552 {
1553 int ok = 0;
1554
1555 clear_epp_timeout(pb);
1556
1557 /* try to tri-state the buffer */
1558 parport_pc_data_reverse(pb);
1559
1560 parport_pc_write_data(pb, 0x55);
1561 if (parport_pc_read_data(pb) != 0x55)
1562 ok++;
1563
1564 parport_pc_write_data(pb, 0xaa);
1565 if (parport_pc_read_data(pb) != 0xaa)
1566 ok++;
1567
1568 /* cancel input mode */
1569 parport_pc_data_forward(pb);
1570
1571 if (ok) {
1572 pb->modes |= PARPORT_MODE_TRISTATE;
1573 } else {
1574 struct parport_pc_private *priv = pb->private_data;
1575 priv->ctr_writable &= ~0x20;
1576 }
1577
1578 return ok;
1579 }
1580
1581 #ifdef CONFIG_PARPORT_PC_FIFO
parport_ECP_supported(struct parport * pb)1582 static int parport_ECP_supported(struct parport *pb)
1583 {
1584 int i;
1585 int config, configb;
1586 int pword;
1587 struct parport_pc_private *priv = pb->private_data;
1588 /* Translate ECP intrLine to ISA irq value */
1589 static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 };
1590
1591 /* If there is no ECR, we have no hope of supporting ECP. */
1592 if (!priv->ecr)
1593 return 0;
1594
1595 /* Find out FIFO depth */
1596 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1597 ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */
1598 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++)
1599 outb(0xaa, FIFO(pb));
1600
1601 /*
1602 * Using LGS chipset it uses ECR register, but
1603 * it doesn't support ECP or FIFO MODE
1604 */
1605 if (i == 1024) {
1606 ECR_WRITE(pb, ECR_SPP << 5);
1607 return 0;
1608 }
1609
1610 priv->fifo_depth = i;
1611 if (verbose_probing)
1612 printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1613
1614 /* Find out writeIntrThreshold */
1615 frob_econtrol(pb, 1<<2, 1<<2);
1616 frob_econtrol(pb, 1<<2, 0);
1617 for (i = 1; i <= priv->fifo_depth; i++) {
1618 inb(FIFO(pb));
1619 udelay(50);
1620 if (inb(ECONTROL(pb)) & (1<<2))
1621 break;
1622 }
1623
1624 if (i <= priv->fifo_depth) {
1625 if (verbose_probing)
1626 printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1627 pb->base, i);
1628 } else
1629 /* Number of bytes we know we can write if we get an
1630 interrupt. */
1631 i = 0;
1632
1633 priv->writeIntrThreshold = i;
1634
1635 /* Find out readIntrThreshold */
1636 frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1637 parport_pc_data_reverse(pb); /* Must be in PS2 mode */
1638 frob_set_mode(pb, ECR_TST); /* Test FIFO */
1639 frob_econtrol(pb, 1<<2, 1<<2);
1640 frob_econtrol(pb, 1<<2, 0);
1641 for (i = 1; i <= priv->fifo_depth; i++) {
1642 outb(0xaa, FIFO(pb));
1643 if (inb(ECONTROL(pb)) & (1<<2))
1644 break;
1645 }
1646
1647 if (i <= priv->fifo_depth) {
1648 if (verbose_probing)
1649 pr_info("0x%lx: readIntrThreshold is %d\n",
1650 pb->base, i);
1651 } else
1652 /* Number of bytes we can read if we get an interrupt. */
1653 i = 0;
1654
1655 priv->readIntrThreshold = i;
1656
1657 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1658 ECR_WRITE(pb, 0xf4); /* Configuration mode */
1659 config = inb(CONFIGA(pb));
1660 pword = (config >> 4) & 0x7;
1661 switch (pword) {
1662 case 0:
1663 pword = 2;
1664 pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
1665 break;
1666 case 2:
1667 pword = 4;
1668 pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
1669 break;
1670 default:
1671 pr_warn("0x%lx: Unknown implementation ID\n", pb->base);
1672 fallthrough; /* Assume 1 */
1673 case 1:
1674 pword = 1;
1675 }
1676 priv->pword = pword;
1677
1678 if (verbose_probing) {
1679 printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
1680 pb->base, 8 * pword);
1681
1682 printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n",
1683 pb->base, config & 0x80 ? "Level" : "Pulses");
1684
1685 configb = inb(CONFIGB(pb));
1686 printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1687 pb->base, config, configb);
1688 printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1689 if ((configb >> 3) & 0x07)
1690 pr_cont("%d", intrline[(configb >> 3) & 0x07]);
1691 else
1692 pr_cont("<none or set by other means>");
1693 pr_cont(" dma=");
1694 if ((configb & 0x03) == 0x00)
1695 pr_cont("<none or set by other means>\n");
1696 else
1697 pr_cont("%d\n", configb & 0x07);
1698 }
1699
1700 /* Go back to mode 000 */
1701 frob_set_mode(pb, ECR_SPP);
1702
1703 return 1;
1704 }
1705 #endif
1706
1707 #ifdef CONFIG_X86_32
intel_bug_present_check_epp(struct parport * pb)1708 static int intel_bug_present_check_epp(struct parport *pb)
1709 {
1710 const struct parport_pc_private *priv = pb->private_data;
1711 int bug_present = 0;
1712
1713 if (priv->ecr) {
1714 /* store value of ECR */
1715 unsigned char ecr = inb(ECONTROL(pb));
1716 unsigned char i;
1717 for (i = 0x00; i < 0x80; i += 0x20) {
1718 ECR_WRITE(pb, i);
1719 if (clear_epp_timeout(pb)) {
1720 /* Phony EPP in ECP. */
1721 bug_present = 1;
1722 break;
1723 }
1724 }
1725 /* return ECR into the inital state */
1726 ECR_WRITE(pb, ecr);
1727 }
1728
1729 return bug_present;
1730 }
intel_bug_present(struct parport * pb)1731 static int intel_bug_present(struct parport *pb)
1732 {
1733 /* Check whether the device is legacy, not PCI or PCMCIA. Only legacy is known to be affected. */
1734 if (pb->dev != NULL) {
1735 return 0;
1736 }
1737
1738 return intel_bug_present_check_epp(pb);
1739 }
1740 #else
intel_bug_present(struct parport * pb)1741 static int intel_bug_present(struct parport *pb)
1742 {
1743 return 0;
1744 }
1745 #endif /* CONFIG_X86_32 */
1746
parport_ECPPS2_supported(struct parport * pb)1747 static int parport_ECPPS2_supported(struct parport *pb)
1748 {
1749 const struct parport_pc_private *priv = pb->private_data;
1750 int result;
1751 unsigned char oecr;
1752
1753 if (!priv->ecr)
1754 return 0;
1755
1756 oecr = inb(ECONTROL(pb));
1757 ECR_WRITE(pb, ECR_PS2 << 5);
1758 result = parport_PS2_supported(pb);
1759 ECR_WRITE(pb, oecr);
1760 return result;
1761 }
1762
1763 /* EPP mode detection */
1764
parport_EPP_supported(struct parport * pb)1765 static int parport_EPP_supported(struct parport *pb)
1766 {
1767 /*
1768 * Theory:
1769 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1770 * when EPP is possible and is set high when an EPP timeout
1771 * occurs (EPP uses the HALT line to stop the CPU while it does
1772 * the byte transfer, an EPP timeout occurs if the attached
1773 * device fails to respond after 10 micro seconds).
1774 *
1775 * This bit is cleared by either reading it (National Semi)
1776 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1777 * This bit is always high in non EPP modes.
1778 */
1779
1780 /* If EPP timeout bit clear then EPP available */
1781 if (!clear_epp_timeout(pb))
1782 return 0; /* No way to clear timeout */
1783
1784 /* Check for Intel bug. */
1785 if (intel_bug_present(pb))
1786 return 0;
1787
1788 pb->modes |= PARPORT_MODE_EPP;
1789
1790 /* Set up access functions to use EPP hardware. */
1791 pb->ops->epp_read_data = parport_pc_epp_read_data;
1792 pb->ops->epp_write_data = parport_pc_epp_write_data;
1793 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1794 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1795
1796 return 1;
1797 }
1798
parport_ECPEPP_supported(struct parport * pb)1799 static int parport_ECPEPP_supported(struct parport *pb)
1800 {
1801 struct parport_pc_private *priv = pb->private_data;
1802 int result;
1803 unsigned char oecr;
1804
1805 if (!priv->ecr)
1806 return 0;
1807
1808 oecr = inb(ECONTROL(pb));
1809 /* Search for SMC style EPP+ECP mode */
1810 ECR_WRITE(pb, 0x80);
1811 outb(0x04, CONTROL(pb));
1812 result = parport_EPP_supported(pb);
1813
1814 ECR_WRITE(pb, oecr);
1815
1816 if (result) {
1817 /* Set up access functions to use ECP+EPP hardware. */
1818 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1819 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1820 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1821 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1822 }
1823
1824 return result;
1825 }
1826
1827 #else /* No IEEE 1284 support */
1828
1829 /* Don't bother probing for modes we know we won't use. */
parport_PS2_supported(struct parport * pb)1830 static int parport_PS2_supported(struct parport *pb) { return 0; }
1831 #ifdef CONFIG_PARPORT_PC_FIFO
parport_ECP_supported(struct parport * pb)1832 static int parport_ECP_supported(struct parport *pb)
1833 {
1834 return 0;
1835 }
1836 #endif
parport_EPP_supported(struct parport * pb)1837 static int parport_EPP_supported(struct parport *pb)
1838 {
1839 return 0;
1840 }
1841
parport_ECPEPP_supported(struct parport * pb)1842 static int parport_ECPEPP_supported(struct parport *pb)
1843 {
1844 return 0;
1845 }
1846
parport_ECPPS2_supported(struct parport * pb)1847 static int parport_ECPPS2_supported(struct parport *pb)
1848 {
1849 return 0;
1850 }
1851
1852 #endif /* No IEEE 1284 support */
1853
1854 /* --- IRQ detection -------------------------------------- */
1855
1856 /* Only if supports ECP mode */
programmable_irq_support(struct parport * pb)1857 static int programmable_irq_support(struct parport *pb)
1858 {
1859 int irq, intrLine;
1860 unsigned char oecr = inb(ECONTROL(pb));
1861 static const int lookup[8] = {
1862 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1863 };
1864
1865 ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
1866
1867 intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
1868 irq = lookup[intrLine];
1869
1870 ECR_WRITE(pb, oecr);
1871 return irq;
1872 }
1873
irq_probe_ECP(struct parport * pb)1874 static int irq_probe_ECP(struct parport *pb)
1875 {
1876 int i;
1877 unsigned long irqs;
1878
1879 irqs = probe_irq_on();
1880
1881 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1882 ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
1883 ECR_WRITE(pb, ECR_TST << 5);
1884
1885 /* If Full FIFO sure that writeIntrThreshold is generated */
1886 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++)
1887 outb(0xaa, FIFO(pb));
1888
1889 pb->irq = probe_irq_off(irqs);
1890 ECR_WRITE(pb, ECR_SPP << 5);
1891
1892 if (pb->irq <= 0)
1893 pb->irq = PARPORT_IRQ_NONE;
1894
1895 return pb->irq;
1896 }
1897
1898 /*
1899 * This detection seems that only works in National Semiconductors
1900 * This doesn't work in SMC, LGS, and Winbond
1901 */
irq_probe_EPP(struct parport * pb)1902 static int irq_probe_EPP(struct parport *pb)
1903 {
1904 #ifndef ADVANCED_DETECT
1905 return PARPORT_IRQ_NONE;
1906 #else
1907 int irqs;
1908 unsigned char oecr;
1909
1910 if (pb->modes & PARPORT_MODE_PCECR)
1911 oecr = inb(ECONTROL(pb));
1912
1913 irqs = probe_irq_on();
1914
1915 if (pb->modes & PARPORT_MODE_PCECR)
1916 frob_econtrol(pb, 0x10, 0x10);
1917
1918 clear_epp_timeout(pb);
1919 parport_pc_frob_control(pb, 0x20, 0x20);
1920 parport_pc_frob_control(pb, 0x10, 0x10);
1921 clear_epp_timeout(pb);
1922
1923 /* Device isn't expecting an EPP read
1924 * and generates an IRQ.
1925 */
1926 parport_pc_read_epp(pb);
1927 udelay(20);
1928
1929 pb->irq = probe_irq_off(irqs);
1930 if (pb->modes & PARPORT_MODE_PCECR)
1931 ECR_WRITE(pb, oecr);
1932 parport_pc_write_control(pb, 0xc);
1933
1934 if (pb->irq <= 0)
1935 pb->irq = PARPORT_IRQ_NONE;
1936
1937 return pb->irq;
1938 #endif /* Advanced detection */
1939 }
1940
irq_probe_SPP(struct parport * pb)1941 static int irq_probe_SPP(struct parport *pb)
1942 {
1943 /* Don't even try to do this. */
1944 return PARPORT_IRQ_NONE;
1945 }
1946
1947 /* We will attempt to share interrupt requests since other devices
1948 * such as sound cards and network cards seem to like using the
1949 * printer IRQs.
1950 *
1951 * When ECP is available we can autoprobe for IRQs.
1952 * NOTE: If we can autoprobe it, we can register the IRQ.
1953 */
parport_irq_probe(struct parport * pb)1954 static int parport_irq_probe(struct parport *pb)
1955 {
1956 struct parport_pc_private *priv = pb->private_data;
1957
1958 if (priv->ecr) {
1959 pb->irq = programmable_irq_support(pb);
1960
1961 if (pb->irq == PARPORT_IRQ_NONE)
1962 pb->irq = irq_probe_ECP(pb);
1963 }
1964
1965 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
1966 (pb->modes & PARPORT_MODE_EPP))
1967 pb->irq = irq_probe_EPP(pb);
1968
1969 clear_epp_timeout(pb);
1970
1971 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
1972 pb->irq = irq_probe_EPP(pb);
1973
1974 clear_epp_timeout(pb);
1975
1976 if (pb->irq == PARPORT_IRQ_NONE)
1977 pb->irq = irq_probe_SPP(pb);
1978
1979 if (pb->irq == PARPORT_IRQ_NONE)
1980 pb->irq = get_superio_irq(pb);
1981
1982 return pb->irq;
1983 }
1984
1985 /* --- DMA detection -------------------------------------- */
1986
1987 /* Only if chipset conforms to ECP ISA Interface Standard */
programmable_dma_support(struct parport * p)1988 static int programmable_dma_support(struct parport *p)
1989 {
1990 unsigned char oecr = inb(ECONTROL(p));
1991 int dma;
1992
1993 frob_set_mode(p, ECR_CNF);
1994
1995 dma = inb(CONFIGB(p)) & 0x07;
1996 /* 000: Indicates jumpered 8-bit DMA if read-only.
1997 100: Indicates jumpered 16-bit DMA if read-only. */
1998 if ((dma & 0x03) == 0)
1999 dma = PARPORT_DMA_NONE;
2000
2001 ECR_WRITE(p, oecr);
2002 return dma;
2003 }
2004
parport_dma_probe(struct parport * p)2005 static int parport_dma_probe(struct parport *p)
2006 {
2007 const struct parport_pc_private *priv = p->private_data;
2008 if (priv->ecr) /* ask ECP chipset first */
2009 p->dma = programmable_dma_support(p);
2010 if (p->dma == PARPORT_DMA_NONE) {
2011 /* ask known Super-IO chips proper, although these
2012 claim ECP compatible, some don't report their DMA
2013 conforming to ECP standards */
2014 p->dma = get_superio_dma(p);
2015 }
2016
2017 return p->dma;
2018 }
2019
2020 /* --- Initialisation code -------------------------------- */
2021
2022 static LIST_HEAD(ports_list);
2023 static DEFINE_SPINLOCK(ports_lock);
2024
__parport_pc_probe_port(unsigned long int base,unsigned long int base_hi,int irq,int dma,struct device * dev,int irqflags,unsigned int mode_mask,unsigned char ecr_writable)2025 static struct parport *__parport_pc_probe_port(unsigned long int base,
2026 unsigned long int base_hi,
2027 int irq, int dma,
2028 struct device *dev,
2029 int irqflags,
2030 unsigned int mode_mask,
2031 unsigned char ecr_writable)
2032 {
2033 struct parport_pc_private *priv;
2034 struct parport_operations *ops;
2035 struct parport *p;
2036 int probedirq = PARPORT_IRQ_NONE;
2037 struct resource *base_res;
2038 struct resource *ECR_res = NULL;
2039 struct resource *EPP_res = NULL;
2040 struct platform_device *pdev = NULL;
2041 int ret;
2042
2043 if (!dev) {
2044 /* We need a physical device to attach to, but none was
2045 * provided. Create our own. */
2046 pdev = platform_device_register_simple("parport_pc",
2047 base, NULL, 0);
2048 if (IS_ERR(pdev))
2049 return NULL;
2050 dev = &pdev->dev;
2051
2052 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
2053 if (ret) {
2054 dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
2055 dma = PARPORT_DMA_NONE;
2056 }
2057 }
2058
2059 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
2060 if (!ops)
2061 goto out1;
2062
2063 priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
2064 if (!priv)
2065 goto out2;
2066
2067 /* a misnomer, actually - it's allocate and reserve parport number */
2068 p = parport_register_port(base, irq, dma, ops);
2069 if (!p)
2070 goto out3;
2071
2072 base_res = request_region(base, 3, p->name);
2073 if (!base_res)
2074 goto out4;
2075
2076 memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
2077 priv->ctr = 0xc;
2078 priv->ctr_writable = ~0x10;
2079 priv->ecr = 0;
2080 priv->ecr_writable = ecr_writable;
2081 priv->fifo_depth = 0;
2082 priv->dma_buf = NULL;
2083 priv->dma_handle = 0;
2084 INIT_LIST_HEAD(&priv->list);
2085 priv->port = p;
2086
2087 p->dev = dev;
2088 p->base_hi = base_hi;
2089 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2090 p->private_data = priv;
2091
2092 if (base_hi) {
2093 ECR_res = request_region(base_hi, 3, p->name);
2094 if (ECR_res)
2095 parport_ECR_present(p);
2096 }
2097
2098 if (base != 0x3bc) {
2099 EPP_res = request_region(base+0x3, 5, p->name);
2100 if (EPP_res)
2101 if (!parport_EPP_supported(p))
2102 parport_ECPEPP_supported(p);
2103 }
2104 if (!parport_SPP_supported(p))
2105 /* No port. */
2106 goto out5;
2107 if (priv->ecr)
2108 parport_ECPPS2_supported(p);
2109 else
2110 parport_PS2_supported(p);
2111
2112 p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
2113
2114 pr_info("%s: PC-style at 0x%lx", p->name, p->base);
2115 if (p->base_hi && priv->ecr)
2116 pr_cont(" (0x%lx)", p->base_hi);
2117 if (p->irq == PARPORT_IRQ_AUTO) {
2118 p->irq = PARPORT_IRQ_NONE;
2119 parport_irq_probe(p);
2120 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2121 p->irq = PARPORT_IRQ_NONE;
2122 parport_irq_probe(p);
2123 probedirq = p->irq;
2124 p->irq = PARPORT_IRQ_NONE;
2125 }
2126 if (p->irq != PARPORT_IRQ_NONE) {
2127 pr_cont(", irq %d", p->irq);
2128 priv->ctr_writable |= 0x10;
2129
2130 if (p->dma == PARPORT_DMA_AUTO) {
2131 p->dma = PARPORT_DMA_NONE;
2132 parport_dma_probe(p);
2133 }
2134 }
2135 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2136 is mandatory (see above) */
2137 p->dma = PARPORT_DMA_NONE;
2138
2139 #ifdef CONFIG_PARPORT_PC_FIFO
2140 if (parport_ECP_supported(p) &&
2141 p->dma != PARPORT_DMA_NOFIFO &&
2142 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2143 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2144 if (p->dma != PARPORT_DMA_NONE)
2145 p->modes |= PARPORT_MODE_DMA;
2146 } else
2147 /* We can't use the DMA channel after all. */
2148 p->dma = PARPORT_DMA_NONE;
2149 #endif /* Allowed to use FIFO/DMA */
2150
2151 p->modes &= ~mode_mask;
2152
2153 #ifdef CONFIG_PARPORT_PC_FIFO
2154 if ((p->modes & PARPORT_MODE_COMPAT) != 0)
2155 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2156 #ifdef CONFIG_PARPORT_1284
2157 if ((p->modes & PARPORT_MODE_ECP) != 0)
2158 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2159 #endif
2160 if ((p->modes & (PARPORT_MODE_ECP | PARPORT_MODE_COMPAT)) != 0) {
2161 if ((p->modes & PARPORT_MODE_DMA) != 0)
2162 pr_cont(", dma %d", p->dma);
2163 else
2164 pr_cont(", using FIFO");
2165 }
2166 #endif /* Allowed to use FIFO/DMA */
2167
2168 pr_cont(" [");
2169
2170 #define printmode(x) \
2171 do { \
2172 if (p->modes & PARPORT_MODE_##x) \
2173 pr_cont("%s%s", f++ ? "," : "", #x); \
2174 } while (0)
2175
2176 {
2177 int f = 0;
2178 printmode(PCSPP);
2179 printmode(TRISTATE);
2180 printmode(COMPAT);
2181 printmode(EPP);
2182 printmode(ECP);
2183 printmode(DMA);
2184 }
2185 #undef printmode
2186 #ifndef CONFIG_PARPORT_1284
2187 pr_cont("(,...)");
2188 #endif /* CONFIG_PARPORT_1284 */
2189 pr_cont("]\n");
2190 if (probedirq != PARPORT_IRQ_NONE)
2191 pr_info("%s: irq %d detected\n", p->name, probedirq);
2192
2193 /* If No ECP release the ports grabbed above. */
2194 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2195 release_region(base_hi, 3);
2196 ECR_res = NULL;
2197 }
2198 /* Likewise for EEP ports */
2199 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2200 release_region(base+3, 5);
2201 EPP_res = NULL;
2202 }
2203 if (p->irq != PARPORT_IRQ_NONE) {
2204 if (request_irq(p->irq, parport_irq_handler,
2205 irqflags, p->name, p)) {
2206 pr_warn("%s: irq %d in use, resorting to polled operation\n",
2207 p->name, p->irq);
2208 p->irq = PARPORT_IRQ_NONE;
2209 p->dma = PARPORT_DMA_NONE;
2210 }
2211
2212 #ifdef CONFIG_PARPORT_PC_FIFO
2213 #ifdef HAS_DMA
2214 if (p->dma != PARPORT_DMA_NONE) {
2215 if (request_dma(p->dma, p->name)) {
2216 pr_warn("%s: dma %d in use, resorting to PIO operation\n",
2217 p->name, p->dma);
2218 p->dma = PARPORT_DMA_NONE;
2219 } else {
2220 priv->dma_buf =
2221 dma_alloc_coherent(dev,
2222 PAGE_SIZE,
2223 &priv->dma_handle,
2224 GFP_KERNEL);
2225 if (!priv->dma_buf) {
2226 pr_warn("%s: cannot get buffer for DMA, resorting to PIO operation\n",
2227 p->name);
2228 free_dma(p->dma);
2229 p->dma = PARPORT_DMA_NONE;
2230 }
2231 }
2232 }
2233 #endif
2234 #endif
2235 }
2236
2237 /* Done probing. Now put the port into a sensible start-up state. */
2238 if (priv->ecr)
2239 /*
2240 * Put the ECP detected port in PS2 mode.
2241 * Do this also for ports that have ECR but don't do ECP.
2242 */
2243 ECR_WRITE(p, 0x34);
2244
2245 parport_pc_write_data(p, 0);
2246 parport_pc_data_forward(p);
2247
2248 /* Now that we've told the sharing engine about the port, and
2249 found out its characteristics, let the high-level drivers
2250 know about it. */
2251 spin_lock(&ports_lock);
2252 list_add(&priv->list, &ports_list);
2253 spin_unlock(&ports_lock);
2254 parport_announce_port(p);
2255
2256 return p;
2257
2258 out5:
2259 if (ECR_res)
2260 release_region(base_hi, 3);
2261 if (EPP_res)
2262 release_region(base+0x3, 5);
2263 release_region(base, 3);
2264 out4:
2265 parport_del_port(p);
2266 out3:
2267 kfree(priv);
2268 out2:
2269 kfree(ops);
2270 out1:
2271 if (pdev)
2272 platform_device_unregister(pdev);
2273 return NULL;
2274 }
2275
parport_pc_probe_port(unsigned long int base,unsigned long int base_hi,int irq,int dma,struct device * dev,int irqflags)2276 struct parport *parport_pc_probe_port(unsigned long int base,
2277 unsigned long int base_hi,
2278 int irq, int dma,
2279 struct device *dev,
2280 int irqflags)
2281 {
2282 return __parport_pc_probe_port(base, base_hi, irq, dma,
2283 dev, irqflags, 0, 0);
2284 }
2285 EXPORT_SYMBOL(parport_pc_probe_port);
2286
parport_pc_unregister_port(struct parport * p)2287 void parport_pc_unregister_port(struct parport *p)
2288 {
2289 struct parport_pc_private *priv = p->private_data;
2290 struct parport_operations *ops = p->ops;
2291
2292 parport_remove_port(p);
2293 spin_lock(&ports_lock);
2294 list_del_init(&priv->list);
2295 spin_unlock(&ports_lock);
2296 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2297 if (p->dma != PARPORT_DMA_NONE)
2298 free_dma(p->dma);
2299 #endif
2300 if (p->irq != PARPORT_IRQ_NONE)
2301 free_irq(p->irq, p);
2302 release_region(p->base, 3);
2303 if (p->size > 3)
2304 release_region(p->base + 3, p->size - 3);
2305 if (p->modes & PARPORT_MODE_ECP)
2306 release_region(p->base_hi, 3);
2307 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2308 if (priv->dma_buf)
2309 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2310 priv->dma_buf,
2311 priv->dma_handle);
2312 #endif
2313 kfree(p->private_data);
2314 parport_del_port(p);
2315 kfree(ops); /* hope no-one cached it */
2316 }
2317 EXPORT_SYMBOL(parport_pc_unregister_port);
2318
2319 #ifdef CONFIG_PCI
2320
2321 /* ITE support maintained by Rich Liu <richliu@poorman.org> */
sio_ite_8872_probe(struct pci_dev * pdev,int autoirq,int autodma,const struct parport_pc_via_data * via)2322 static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
2323 const struct parport_pc_via_data *via)
2324 {
2325 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2326 u32 ite8872set;
2327 u32 ite8872_lpt, ite8872_lpthi;
2328 u8 ite8872_irq, type;
2329 int irq;
2330 int i;
2331
2332 pr_debug("sio_ite_8872_probe()\n");
2333
2334 /* make sure which one chip */
2335 for (i = 0; i < 5; i++) {
2336 if (request_region(inta_addr[i], 32, "it887x")) {
2337 int test;
2338 pci_write_config_dword(pdev, 0x60,
2339 0xe5000000 | inta_addr[i]);
2340 pci_write_config_dword(pdev, 0x78,
2341 0x00000000 | inta_addr[i]);
2342 test = inb(inta_addr[i]);
2343 if (test != 0xff)
2344 break;
2345 release_region(inta_addr[i], 32);
2346 }
2347 }
2348 if (i >= 5) {
2349 pr_info("parport_pc: cannot find ITE8872 INTA\n");
2350 return 0;
2351 }
2352
2353 type = inb(inta_addr[i] + 0x18);
2354 type &= 0x0f;
2355
2356 switch (type) {
2357 case 0x2:
2358 pr_info("parport_pc: ITE8871 found (1P)\n");
2359 ite8872set = 0x64200000;
2360 break;
2361 case 0xa:
2362 pr_info("parport_pc: ITE8875 found (1P)\n");
2363 ite8872set = 0x64200000;
2364 break;
2365 case 0xe:
2366 pr_info("parport_pc: ITE8872 found (2S1P)\n");
2367 ite8872set = 0x64e00000;
2368 break;
2369 case 0x6:
2370 pr_info("parport_pc: ITE8873 found (1S)\n");
2371 release_region(inta_addr[i], 32);
2372 return 0;
2373 case 0x8:
2374 pr_info("parport_pc: ITE8874 found (2S)\n");
2375 release_region(inta_addr[i], 32);
2376 return 0;
2377 default:
2378 pr_info("parport_pc: unknown ITE887x\n");
2379 pr_info("parport_pc: please mail 'lspci -nvv' output to Rich.Liu@ite.com.tw\n");
2380 release_region(inta_addr[i], 32);
2381 return 0;
2382 }
2383
2384 pci_read_config_byte(pdev, 0x3c, &ite8872_irq);
2385 pci_read_config_dword(pdev, 0x1c, &ite8872_lpt);
2386 ite8872_lpt &= 0x0000ff00;
2387 pci_read_config_dword(pdev, 0x20, &ite8872_lpthi);
2388 ite8872_lpthi &= 0x0000ff00;
2389 pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2390 pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2391 pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2392 /* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */
2393 /* SET Parallel IRQ */
2394 pci_write_config_dword(pdev, 0x9c,
2395 ite8872set | (ite8872_irq * 0x11111));
2396
2397 pr_debug("ITE887x: The IRQ is %d\n", ite8872_irq);
2398 pr_debug("ITE887x: The PARALLEL I/O port is 0x%x\n", ite8872_lpt);
2399 pr_debug("ITE887x: The PARALLEL I/O porthi is 0x%x\n", ite8872_lpthi);
2400
2401 /* Let the user (or defaults) steer us away from interrupts */
2402 irq = ite8872_irq;
2403 if (autoirq != PARPORT_IRQ_AUTO)
2404 irq = PARPORT_IRQ_NONE;
2405
2406 /*
2407 * Release the resource so that parport_pc_probe_port can get it.
2408 */
2409 release_region(inta_addr[i], 32);
2410 if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi,
2411 irq, PARPORT_DMA_NONE, &pdev->dev, 0)) {
2412 pr_info("parport_pc: ITE 8872 parallel port: io=0x%X",
2413 ite8872_lpt);
2414 if (irq != PARPORT_IRQ_NONE)
2415 pr_cont(", irq=%d", irq);
2416 pr_cont("\n");
2417 return 1;
2418 }
2419
2420 return 0;
2421 }
2422
2423 /* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2424 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2425 static int parport_init_mode;
2426
2427 /* Data for two known VIA chips */
2428 static struct parport_pc_via_data via_686a_data = {
2429 0x51,
2430 0x50,
2431 0x85,
2432 0x02,
2433 0xE2,
2434 0xF0,
2435 0xE6
2436 };
2437 static struct parport_pc_via_data via_8231_data = {
2438 0x45,
2439 0x44,
2440 0x50,
2441 0x04,
2442 0xF2,
2443 0xFA,
2444 0xF6
2445 };
2446
sio_via_probe(struct pci_dev * pdev,int autoirq,int autodma,const struct parport_pc_via_data * via)2447 static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma,
2448 const struct parport_pc_via_data *via)
2449 {
2450 u8 tmp, tmp2, siofunc;
2451 u8 ppcontrol = 0;
2452 int dma, irq;
2453 unsigned port1, port2;
2454 unsigned have_epp = 0;
2455
2456 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2457
2458 switch (parport_init_mode) {
2459 case 1:
2460 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2461 siofunc = VIA_FUNCTION_PARPORT_SPP;
2462 break;
2463 case 2:
2464 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2465 siofunc = VIA_FUNCTION_PARPORT_SPP;
2466 ppcontrol = VIA_PARPORT_BIDIR;
2467 break;
2468 case 3:
2469 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2470 siofunc = VIA_FUNCTION_PARPORT_EPP;
2471 ppcontrol = VIA_PARPORT_BIDIR;
2472 have_epp = 1;
2473 break;
2474 case 4:
2475 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2476 siofunc = VIA_FUNCTION_PARPORT_ECP;
2477 ppcontrol = VIA_PARPORT_BIDIR;
2478 break;
2479 case 5:
2480 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2481 siofunc = VIA_FUNCTION_PARPORT_ECP;
2482 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2483 have_epp = 1;
2484 break;
2485 default:
2486 printk(KERN_DEBUG "parport_pc: probing current configuration\n");
2487 siofunc = VIA_FUNCTION_PROBE;
2488 break;
2489 }
2490 /*
2491 * unlock super i/o configuration
2492 */
2493 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2494 tmp |= via->via_pci_superio_config_data;
2495 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2496
2497 /* Bits 1-0: Parallel Port Mode / Enable */
2498 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2499 tmp = inb(VIA_CONFIG_DATA);
2500 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2501 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2502 tmp2 = inb(VIA_CONFIG_DATA);
2503 if (siofunc == VIA_FUNCTION_PROBE) {
2504 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2505 ppcontrol = tmp2;
2506 } else {
2507 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2508 tmp |= siofunc;
2509 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2510 outb(tmp, VIA_CONFIG_DATA);
2511 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2512 tmp2 |= ppcontrol;
2513 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2514 outb(tmp2, VIA_CONFIG_DATA);
2515 }
2516
2517 /* Parallel Port I/O Base Address, bits 9-2 */
2518 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2519 port1 = inb(VIA_CONFIG_DATA) << 2;
2520
2521 printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
2522 port1);
2523 if (port1 == 0x3BC && have_epp) {
2524 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2525 outb((0x378 >> 2), VIA_CONFIG_DATA);
2526 printk(KERN_DEBUG "parport_pc: Parallel port base changed to 0x378\n");
2527 port1 = 0x378;
2528 }
2529
2530 /*
2531 * lock super i/o configuration
2532 */
2533 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2534 tmp &= ~via->via_pci_superio_config_data;
2535 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2536
2537 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2538 pr_info("parport_pc: VIA parallel port disabled in BIOS\n");
2539 return 0;
2540 }
2541
2542 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2543 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2544 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2545
2546 if (siofunc == VIA_FUNCTION_PARPORT_ECP) {
2547 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2548 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2549 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2550 } else
2551 /* if ECP not enabled, DMA is not enabled, assumed
2552 bogus 'dma' value */
2553 dma = PARPORT_DMA_NONE;
2554
2555 /* Let the user (or defaults) steer us away from interrupts and DMA */
2556 if (autoirq == PARPORT_IRQ_NONE) {
2557 irq = PARPORT_IRQ_NONE;
2558 dma = PARPORT_DMA_NONE;
2559 }
2560 if (autodma == PARPORT_DMA_NONE)
2561 dma = PARPORT_DMA_NONE;
2562
2563 switch (port1) {
2564 case 0x3bc:
2565 port2 = 0x7bc; break;
2566 case 0x378:
2567 port2 = 0x778; break;
2568 case 0x278:
2569 port2 = 0x678; break;
2570 default:
2571 pr_info("parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2572 port1);
2573 return 0;
2574 }
2575
2576 /* filter bogus IRQs */
2577 switch (irq) {
2578 case 0:
2579 case 2:
2580 case 8:
2581 case 13:
2582 irq = PARPORT_IRQ_NONE;
2583 break;
2584
2585 default: /* do nothing */
2586 break;
2587 }
2588
2589 /* finally, do the probe with values obtained */
2590 if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) {
2591 pr_info("parport_pc: VIA parallel port: io=0x%X", port1);
2592 if (irq != PARPORT_IRQ_NONE)
2593 pr_cont(", irq=%d", irq);
2594 if (dma != PARPORT_DMA_NONE)
2595 pr_cont(", dma=%d", dma);
2596 pr_cont("\n");
2597 return 1;
2598 }
2599
2600 pr_warn("parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2601 port1, irq, dma);
2602 return 0;
2603 }
2604
2605
2606 enum parport_pc_sio_types {
2607 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2608 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2609 sio_ite_8872,
2610 last_sio
2611 };
2612
2613 /* each element directly indexed from enum list, above */
2614 static struct parport_pc_superio {
2615 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2616 const struct parport_pc_via_data *via);
2617 const struct parport_pc_via_data *via;
2618 } parport_pc_superio_info[] = {
2619 { sio_via_probe, &via_686a_data, },
2620 { sio_via_probe, &via_8231_data, },
2621 { sio_ite_8872_probe, NULL, },
2622 };
2623
2624 enum parport_pc_pci_cards {
2625 siig_1p_10x = last_sio,
2626 siig_2p_10x,
2627 siig_1p_20x,
2628 siig_2p_20x,
2629 lava_parallel,
2630 lava_parallel_dual_a,
2631 lava_parallel_dual_b,
2632 boca_ioppar,
2633 plx_9050,
2634 timedia_4006a,
2635 timedia_4014,
2636 timedia_4008a,
2637 timedia_4018,
2638 timedia_9018a,
2639 syba_2p_epp,
2640 syba_1p_ecp,
2641 titan_010l,
2642 avlab_1p,
2643 avlab_2p,
2644 oxsemi_952,
2645 oxsemi_954,
2646 oxsemi_840,
2647 oxsemi_pcie_pport,
2648 aks_0100,
2649 mobility_pp,
2650 netmos_9900,
2651 netmos_9705,
2652 netmos_9715,
2653 netmos_9755,
2654 netmos_9805,
2655 netmos_9815,
2656 netmos_9901,
2657 netmos_9865,
2658 asix_ax99100,
2659 quatech_sppxp100,
2660 wch_ch382l,
2661 brainboxes_uc146,
2662 brainboxes_px203,
2663 };
2664
2665
2666 /* each element directly indexed from enum list, above
2667 * (but offset by last_sio) */
2668 static struct parport_pc_pci {
2669 int numports;
2670 struct { /* BAR (base address registers) numbers in the config
2671 space header */
2672 int lo;
2673 int hi;
2674 /* -1 if not there, >6 for offset-method (max BAR is 6) */
2675 } addr[2];
2676
2677 /* Bit field of parport modes to exclude. */
2678 unsigned int mode_mask;
2679
2680 /* If non-zero, sets the bitmask of writable ECR bits. In that
2681 * case additionally bit 0 will be forcibly set on writes. */
2682 unsigned char ecr_writable;
2683
2684 /* If set, this is called immediately after pci_enable_device.
2685 * If it returns non-zero, no probing will take place and the
2686 * ports will not be used. */
2687 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2688
2689 /* If set, this is called after probing for ports. If 'failed'
2690 * is non-zero we couldn't use any of the ports. */
2691 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2692 } cards[] = {
2693 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2694 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2695 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2696 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2697 /* lava_parallel */ { 1, { { 0, -1 }, } },
2698 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2699 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2700 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2701 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2702 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2703 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2704 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2705 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2706 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2707 /* SYBA uses fixed offsets in
2708 a 1K io window */
2709 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2710 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2711 /* titan_010l */ { 1, { { 3, -1 }, } },
2712 /* avlab_1p */ { 1, { { 0, 1}, } },
2713 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2714 /* The Oxford Semi cards are unusual: older variants of 954 don't
2715 * support ECP, and 840 locks up if you write 1 to bit 2! None
2716 * implement nFault or service interrupts and all require 00001
2717 * bit pattern to be used for bits 4:0 with ECR writes. */
2718 /* oxsemi_952 */ { 1, { { 0, 1 }, },
2719 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2720 /* oxsemi_954 */ { 1, { { 0, 1 }, },
2721 PARPORT_MODE_ECP |
2722 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2723 /* oxsemi_840 */ { 1, { { 0, 1 }, },
2724 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2725 /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, },
2726 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2727 /* aks_0100 */ { 1, { { 0, -1 }, } },
2728 /* mobility_pp */ { 1, { { 0, 1 }, } },
2729 /* netmos_9900 */ { 1, { { 0, -1 }, } },
2730
2731 /* The netmos entries below are untested */
2732 /* netmos_9705 */ { 1, { { 0, -1 }, } },
2733 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
2734 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
2735 /* netmos_9805 */ { 1, { { 0, 1 }, } },
2736 /* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2737 /* netmos_9901 */ { 1, { { 0, -1 }, } },
2738 /* netmos_9865 */ { 1, { { 0, -1 }, } },
2739 /* asix_ax99100 */ { 1, { { 0, 1 }, } },
2740 /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
2741 /* wch_ch382l */ { 1, { { 2, -1 }, } },
2742 /* brainboxes_uc146 */ { 1, { { 3, -1 }, } },
2743 /* brainboxes_px203 */ { 1, { { 0, -1 }, } },
2744 };
2745
2746 static const struct pci_device_id parport_pc_pci_tbl[] = {
2747 /* Super-IO onboard chips */
2748 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2749 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2750 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2751 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2752
2753 /* PCI cards */
2754 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2755 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2756 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2757 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2758 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2759 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2760 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2761 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2762 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2763 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2764 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2765 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2766 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2767 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2768 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2769 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2770 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2771 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
2772 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2773 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2774 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2775 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2776 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2777 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2778 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2779 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2780 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2781 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2782 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2783 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2784 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2785 /* AFAVLAB_TK9902 */
2786 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
2787 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2788 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2789 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2790 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2791 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2792 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2793 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2794 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
2795 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2796 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
2797 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2798 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
2799 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2800 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
2801 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2802 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
2803 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2804 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
2805 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2806 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
2807 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2808 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
2809 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2810 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2811 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2812 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2813 /* NetMos communication controllers */
2814 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900,
2815 0xA000, 0x2000, 0, 0, netmos_9900 },
2816 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2817 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2818 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2819 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2820 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2821 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2822 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2823 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2824 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2825 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2826 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
2827 0xA000, 0x2000, 0, 0, netmos_9901 },
2828 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2829 0xA000, 0x1000, 0, 0, netmos_9865 },
2830 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2831 0xA000, 0x2000, 0, 0, netmos_9865 },
2832 /* ASIX AX99100 PCIe to Multi I/O Controller */
2833 { PCI_VENDOR_ID_ASIX, PCI_DEVICE_ID_ASIX_AX99100,
2834 0xA000, 0x2000, 0, 0, asix_ax99100 },
2835 /* Quatech SPPXP-100 Parallel port PCI ExpressCard */
2836 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
2837 PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
2838 /* WCH CH382L PCI-E single parallel port card */
2839 { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l },
2840 /* Brainboxes IX-500/550 */
2841 { PCI_VENDOR_ID_INTASHIELD, 0x402a,
2842 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2843 /* Brainboxes UC-146/UC-157 */
2844 { PCI_VENDOR_ID_INTASHIELD, 0x0be1,
2845 PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_uc146 },
2846 { PCI_VENDOR_ID_INTASHIELD, 0x0be2,
2847 PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_uc146 },
2848 /* Brainboxes PX-146/PX-257 */
2849 { PCI_VENDOR_ID_INTASHIELD, 0x401c,
2850 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2851 /* Brainboxes PX-203 */
2852 { PCI_VENDOR_ID_INTASHIELD, 0x4007,
2853 PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_px203 },
2854 /* Brainboxes PX-475 */
2855 { PCI_VENDOR_ID_INTASHIELD, 0x401f,
2856 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2857 { 0, } /* terminate list */
2858 };
2859 MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
2860
2861 struct pci_parport_data {
2862 int num;
2863 struct parport *ports[2];
2864 };
2865
parport_pc_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)2866 static int parport_pc_pci_probe(struct pci_dev *dev,
2867 const struct pci_device_id *id)
2868 {
2869 int err, count, n, i = id->driver_data;
2870 struct pci_parport_data *data;
2871
2872 if (i < last_sio)
2873 /* This is an onboard Super-IO and has already been probed */
2874 return 0;
2875
2876 /* This is a PCI card */
2877 i -= last_sio;
2878 count = 0;
2879 err = pci_enable_device(dev);
2880 if (err)
2881 return err;
2882
2883 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2884 if (!data)
2885 return -ENOMEM;
2886
2887 if (cards[i].preinit_hook &&
2888 cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2889 kfree(data);
2890 return -ENODEV;
2891 }
2892
2893 for (n = 0; n < cards[i].numports; n++) {
2894 int lo = cards[i].addr[n].lo;
2895 int hi = cards[i].addr[n].hi;
2896 int irq;
2897 unsigned long io_lo, io_hi;
2898 io_lo = pci_resource_start(dev, lo);
2899 io_hi = 0;
2900 if ((hi >= 0) && (hi <= 6))
2901 io_hi = pci_resource_start(dev, hi);
2902 else if (hi > 6)
2903 io_lo += hi; /* Reinterpret the meaning of
2904 "hi" as an offset (see SYBA
2905 def.) */
2906 /* TODO: test if sharing interrupts works */
2907 irq = dev->irq;
2908 if (irq == IRQ_NONE) {
2909 printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
2910 id->vendor, id->device, io_lo, io_hi);
2911 irq = PARPORT_IRQ_NONE;
2912 } else {
2913 printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
2914 id->vendor, id->device, io_lo, io_hi, irq);
2915 }
2916 data->ports[count] =
2917 __parport_pc_probe_port(io_lo, io_hi, irq,
2918 PARPORT_DMA_NONE, &dev->dev,
2919 IRQF_SHARED,
2920 cards[i].mode_mask,
2921 cards[i].ecr_writable);
2922 if (data->ports[count])
2923 count++;
2924 }
2925
2926 data->num = count;
2927
2928 if (cards[i].postinit_hook)
2929 cards[i].postinit_hook(dev, count == 0);
2930
2931 if (count) {
2932 pci_set_drvdata(dev, data);
2933 return 0;
2934 }
2935
2936 kfree(data);
2937
2938 return -ENODEV;
2939 }
2940
parport_pc_pci_remove(struct pci_dev * dev)2941 static void parport_pc_pci_remove(struct pci_dev *dev)
2942 {
2943 struct pci_parport_data *data = pci_get_drvdata(dev);
2944 int i;
2945
2946 if (data) {
2947 for (i = data->num - 1; i >= 0; i--)
2948 parport_pc_unregister_port(data->ports[i]);
2949
2950 kfree(data);
2951 }
2952 }
2953
2954 static struct pci_driver parport_pc_pci_driver = {
2955 .name = "parport_pc",
2956 .id_table = parport_pc_pci_tbl,
2957 .probe = parport_pc_pci_probe,
2958 .remove = parport_pc_pci_remove,
2959 };
2960
parport_pc_init_superio(int autoirq,int autodma)2961 static int __init parport_pc_init_superio(int autoirq, int autodma)
2962 {
2963 const struct pci_device_id *id;
2964 struct pci_dev *pdev = NULL;
2965 int ret = 0;
2966
2967 for_each_pci_dev(pdev) {
2968 id = pci_match_id(parport_pc_pci_tbl, pdev);
2969 if (id == NULL || id->driver_data >= last_sio)
2970 continue;
2971
2972 if (parport_pc_superio_info[id->driver_data].probe(
2973 pdev, autoirq, autodma,
2974 parport_pc_superio_info[id->driver_data].via)) {
2975 ret++;
2976 }
2977 }
2978
2979 return ret; /* number of devices found */
2980 }
2981 #else
2982 static struct pci_driver parport_pc_pci_driver;
parport_pc_init_superio(int autoirq,int autodma)2983 static int __init parport_pc_init_superio(int autoirq, int autodma)
2984 {
2985 return 0;
2986 }
2987 #endif /* CONFIG_PCI */
2988
2989 #ifdef CONFIG_PNP
2990
2991 static const struct pnp_device_id parport_pc_pnp_tbl[] = {
2992 /* Standard LPT Printer Port */
2993 {.id = "PNP0400", .driver_data = 0},
2994 /* ECP Printer Port */
2995 {.id = "PNP0401", .driver_data = 0},
2996 { }
2997 };
2998
2999 MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
3000
parport_pc_pnp_probe(struct pnp_dev * dev,const struct pnp_device_id * id)3001 static int parport_pc_pnp_probe(struct pnp_dev *dev,
3002 const struct pnp_device_id *id)
3003 {
3004 struct parport *pdata;
3005 unsigned long io_lo, io_hi;
3006 int dma, irq;
3007
3008 if (pnp_port_valid(dev, 0) &&
3009 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
3010 io_lo = pnp_port_start(dev, 0);
3011 } else
3012 return -EINVAL;
3013
3014 if (pnp_port_valid(dev, 1) &&
3015 !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
3016 io_hi = pnp_port_start(dev, 1);
3017 } else
3018 io_hi = 0;
3019
3020 if (pnp_irq_valid(dev, 0) &&
3021 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
3022 irq = pnp_irq(dev, 0);
3023 } else
3024 irq = PARPORT_IRQ_NONE;
3025
3026 if (pnp_dma_valid(dev, 0) &&
3027 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
3028 dma = pnp_dma(dev, 0);
3029 } else
3030 dma = PARPORT_DMA_NONE;
3031
3032 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
3033 pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
3034 if (pdata == NULL)
3035 return -ENODEV;
3036
3037 pnp_set_drvdata(dev, pdata);
3038 return 0;
3039 }
3040
parport_pc_pnp_remove(struct pnp_dev * dev)3041 static void parport_pc_pnp_remove(struct pnp_dev *dev)
3042 {
3043 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3044 if (!pdata)
3045 return;
3046
3047 parport_pc_unregister_port(pdata);
3048 }
3049
3050 /* we only need the pnp layer to activate the device, at least for now */
3051 static struct pnp_driver parport_pc_pnp_driver = {
3052 .name = "parport_pc",
3053 .id_table = parport_pc_pnp_tbl,
3054 .probe = parport_pc_pnp_probe,
3055 .remove = parport_pc_pnp_remove,
3056 };
3057
3058 #else
3059 static struct pnp_driver parport_pc_pnp_driver;
3060 #endif /* CONFIG_PNP */
3061
parport_pc_platform_probe(struct platform_device * pdev)3062 static int parport_pc_platform_probe(struct platform_device *pdev)
3063 {
3064 /* Always succeed, the actual probing is done in
3065 * parport_pc_probe_port(). */
3066 return 0;
3067 }
3068
3069 static struct platform_driver parport_pc_platform_driver = {
3070 .driver = {
3071 .name = "parport_pc",
3072 },
3073 .probe = parport_pc_platform_probe,
3074 };
3075
3076 /* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3077 static int __attribute__((unused))
parport_pc_find_isa_ports(int autoirq,int autodma)3078 parport_pc_find_isa_ports(int autoirq, int autodma)
3079 {
3080 int count = 0;
3081
3082 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
3083 count++;
3084 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
3085 count++;
3086 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
3087 count++;
3088
3089 return count;
3090 }
3091
3092 /* This function is called by parport_pc_init if the user didn't
3093 * specify any ports to probe. Its job is to find some ports. Order
3094 * is important here -- we want ISA ports to be registered first,
3095 * followed by PCI cards (for least surprise), but before that we want
3096 * to do chipset-specific tests for some onboard ports that we know
3097 * about.
3098 *
3099 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3100 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3101 */
parport_pc_find_ports(int autoirq,int autodma)3102 static void __init parport_pc_find_ports(int autoirq, int autodma)
3103 {
3104 int count = 0, err;
3105
3106 #ifdef CONFIG_PARPORT_PC_SUPERIO
3107 detect_and_report_it87();
3108 detect_and_report_winbond();
3109 detect_and_report_smsc();
3110 #endif
3111
3112 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3113 count += parport_pc_init_superio(autoirq, autodma);
3114
3115 /* PnP ports, skip detection if SuperIO already found them */
3116 if (!count) {
3117 err = pnp_register_driver(&parport_pc_pnp_driver);
3118 if (!err)
3119 pnp_registered_parport = 1;
3120 }
3121
3122 /* ISA ports and whatever (see asm/parport.h). */
3123 parport_pc_find_nonpci_ports(autoirq, autodma);
3124
3125 err = pci_register_driver(&parport_pc_pci_driver);
3126 if (!err)
3127 pci_registered_parport = 1;
3128 }
3129
3130 /*
3131 * Piles of crap below pretend to be a parser for module and kernel
3132 * parameters. Say "thank you" to whoever had come up with that
3133 * syntax and keep in mind that code below is a cleaned up version.
3134 */
3135
3136 static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
3137 [0 ... PARPORT_PC_MAX_PORTS] = 0
3138 };
3139 static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
3140 [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
3141 };
3142 static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
3143 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
3144 };
3145 static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
3146 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
3147 };
3148
parport_parse_param(const char * s,int * val,int automatic,int none,int nofifo)3149 static int __init parport_parse_param(const char *s, int *val,
3150 int automatic, int none, int nofifo)
3151 {
3152 if (!s)
3153 return 0;
3154 if (!strncmp(s, "auto", 4))
3155 *val = automatic;
3156 else if (!strncmp(s, "none", 4))
3157 *val = none;
3158 else if (nofifo && !strncmp(s, "nofifo", 6))
3159 *val = nofifo;
3160 else {
3161 char *ep;
3162 unsigned long r = simple_strtoul(s, &ep, 0);
3163 if (ep != s)
3164 *val = r;
3165 else {
3166 pr_err("parport: bad specifier `%s'\n", s);
3167 return -1;
3168 }
3169 }
3170 return 0;
3171 }
3172
parport_parse_irq(const char * irqstr,int * val)3173 static int __init parport_parse_irq(const char *irqstr, int *val)
3174 {
3175 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3176 PARPORT_IRQ_NONE, 0);
3177 }
3178
parport_parse_dma(const char * dmastr,int * val)3179 static int __init parport_parse_dma(const char *dmastr, int *val)
3180 {
3181 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3182 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3183 }
3184
3185 #ifdef CONFIG_PCI
parport_init_mode_setup(char * str)3186 static int __init parport_init_mode_setup(char *str)
3187 {
3188 printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n",
3189 str);
3190
3191 if (!strcmp(str, "spp"))
3192 parport_init_mode = 1;
3193 if (!strcmp(str, "ps2"))
3194 parport_init_mode = 2;
3195 if (!strcmp(str, "epp"))
3196 parport_init_mode = 3;
3197 if (!strcmp(str, "ecp"))
3198 parport_init_mode = 4;
3199 if (!strcmp(str, "ecpepp"))
3200 parport_init_mode = 5;
3201 return 1;
3202 }
3203 #endif
3204
3205 #ifdef MODULE
3206 static char *irq[PARPORT_PC_MAX_PORTS];
3207 static char *dma[PARPORT_PC_MAX_PORTS];
3208
3209 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3210 module_param_hw_array(io, int, ioport, NULL, 0);
3211 MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3212 module_param_hw_array(io_hi, int, ioport, NULL, 0);
3213 MODULE_PARM_DESC(irq, "IRQ line");
3214 module_param_hw_array(irq, charp, irq, NULL, 0);
3215 MODULE_PARM_DESC(dma, "DMA channel");
3216 module_param_hw_array(dma, charp, dma, NULL, 0);
3217 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3218 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3219 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3220 module_param(verbose_probing, int, 0644);
3221 #endif
3222 #ifdef CONFIG_PCI
3223 static char *init_mode;
3224 MODULE_PARM_DESC(init_mode,
3225 "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3226 module_param(init_mode, charp, 0);
3227 #endif
3228
parse_parport_params(void)3229 static int __init parse_parport_params(void)
3230 {
3231 unsigned int i;
3232 int val;
3233
3234 #ifdef CONFIG_PCI
3235 if (init_mode)
3236 parport_init_mode_setup(init_mode);
3237 #endif
3238
3239 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3240 if (parport_parse_irq(irq[i], &val))
3241 return 1;
3242 irqval[i] = val;
3243 if (parport_parse_dma(dma[i], &val))
3244 return 1;
3245 dmaval[i] = val;
3246 }
3247 if (!io[0]) {
3248 /* The user can make us use any IRQs or DMAs we find. */
3249 if (irq[0] && !parport_parse_irq(irq[0], &val))
3250 switch (val) {
3251 case PARPORT_IRQ_NONE:
3252 case PARPORT_IRQ_AUTO:
3253 irqval[0] = val;
3254 break;
3255 default:
3256 pr_warn("parport_pc: irq specified without base address. Use 'io=' to specify one\n");
3257 }
3258
3259 if (dma[0] && !parport_parse_dma(dma[0], &val))
3260 switch (val) {
3261 case PARPORT_DMA_NONE:
3262 case PARPORT_DMA_AUTO:
3263 dmaval[0] = val;
3264 break;
3265 default:
3266 pr_warn("parport_pc: dma specified without base address. Use 'io=' to specify one\n");
3267 }
3268 }
3269 return 0;
3270 }
3271
3272 #else
3273
3274 static int parport_setup_ptr __initdata;
3275
3276 /*
3277 * Acceptable parameters:
3278 *
3279 * parport=0
3280 * parport=auto
3281 * parport=0xBASE[,IRQ[,DMA]]
3282 *
3283 * IRQ/DMA may be numeric or 'auto' or 'none'
3284 */
parport_setup(char * str)3285 static int __init parport_setup(char *str)
3286 {
3287 char *endptr;
3288 char *sep;
3289 int val;
3290
3291 if (!str || !*str || (*str == '0' && !*(str+1))) {
3292 /* Disable parport if "parport=0" in cmdline */
3293 io[0] = PARPORT_DISABLE;
3294 return 1;
3295 }
3296
3297 if (!strncmp(str, "auto", 4)) {
3298 irqval[0] = PARPORT_IRQ_AUTO;
3299 dmaval[0] = PARPORT_DMA_AUTO;
3300 return 1;
3301 }
3302
3303 val = simple_strtoul(str, &endptr, 0);
3304 if (endptr == str) {
3305 pr_warn("parport=%s not understood\n", str);
3306 return 1;
3307 }
3308
3309 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3310 pr_err("parport=%s ignored, too many ports\n", str);
3311 return 1;
3312 }
3313
3314 io[parport_setup_ptr] = val;
3315 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3316 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3317
3318 sep = strchr(str, ',');
3319 if (sep++) {
3320 if (parport_parse_irq(sep, &val))
3321 return 1;
3322 irqval[parport_setup_ptr] = val;
3323 sep = strchr(sep, ',');
3324 if (sep++) {
3325 if (parport_parse_dma(sep, &val))
3326 return 1;
3327 dmaval[parport_setup_ptr] = val;
3328 }
3329 }
3330 parport_setup_ptr++;
3331 return 1;
3332 }
3333
parse_parport_params(void)3334 static int __init parse_parport_params(void)
3335 {
3336 return io[0] == PARPORT_DISABLE;
3337 }
3338
3339 __setup("parport=", parport_setup);
3340
3341 /*
3342 * Acceptable parameters:
3343 *
3344 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3345 */
3346 #ifdef CONFIG_PCI
3347 __setup("parport_init_mode=", parport_init_mode_setup);
3348 #endif
3349 #endif
3350
3351 /* "Parser" ends here */
3352
parport_pc_init(void)3353 static int __init parport_pc_init(void)
3354 {
3355 int err;
3356
3357 if (parse_parport_params())
3358 return -EINVAL;
3359
3360 err = platform_driver_register(&parport_pc_platform_driver);
3361 if (err)
3362 return err;
3363
3364 if (io[0]) {
3365 int i;
3366 /* Only probe the ports we were given. */
3367 user_specified = 1;
3368 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3369 if (!io[i])
3370 break;
3371 if (io_hi[i] == PARPORT_IOHI_AUTO)
3372 io_hi[i] = 0x400 + io[i];
3373 parport_pc_probe_port(io[i], io_hi[i],
3374 irqval[i], dmaval[i], NULL, 0);
3375 }
3376 } else
3377 parport_pc_find_ports(irqval[0], dmaval[0]);
3378
3379 return 0;
3380 }
3381
parport_pc_exit(void)3382 static void __exit parport_pc_exit(void)
3383 {
3384 if (pci_registered_parport)
3385 pci_unregister_driver(&parport_pc_pci_driver);
3386 if (pnp_registered_parport)
3387 pnp_unregister_driver(&parport_pc_pnp_driver);
3388 platform_driver_unregister(&parport_pc_platform_driver);
3389
3390 while (!list_empty(&ports_list)) {
3391 struct parport_pc_private *priv;
3392 struct parport *port;
3393 struct device *dev;
3394 priv = list_entry(ports_list.next,
3395 struct parport_pc_private, list);
3396 port = priv->port;
3397 dev = port->dev;
3398 parport_pc_unregister_port(port);
3399 if (dev && dev->bus == &platform_bus_type)
3400 platform_device_unregister(to_platform_device(dev));
3401 }
3402 }
3403
3404 MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3405 MODULE_DESCRIPTION("PC-style parallel port driver");
3406 MODULE_LICENSE("GPL");
3407 module_init(parport_pc_init)
3408 module_exit(parport_pc_exit)
3409