xref: /linux/drivers/parport/parport_pc.c (revision 41c177cf354126a22443b5c80cec9fdd313e67e1)
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