1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Low-level parallel-port routines for 8255-based PC-style hardware.
4 * Authors: Phil Blundell <philb@gnu.org>
5 * Tim Waugh <tim@cyberelk.demon.co.uk>
6 * Jose Renau <renau@acm.org>
10 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
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>
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
29 * In addition, there are some optional registers:
33 * base+0x400 ECP config A
34 * base+0x401 ECP config B
35 * base+0x402 ECP control
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
42 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
43 * but rather will start at port->base_hi.
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>
61 #include <linux/uaccess.h>
65 #include <linux/parport.h>
66 #include <linux/parport_pc.h>
67 #include <linux/via.h>
68 #include <asm/parport.h>
70 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
72 #ifdef CONFIG_ISA_DMA_API
85 #define ECR_MODE_MASK 0xe0
86 #define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v))
91 static struct superio_struct { /* For Super-IO chips autodetection */
95 } superios[NR_SUPERIOS] = { {0,},};
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;
102 static int pci_registered_parport;
103 static int pnp_registered_parport;
105 /* frob_control, but for ECR */
106 static void frob_econtrol(struct parport *pb, unsigned char m,
109 const struct parport_pc_private *priv = pb->physport->private_data;
110 unsigned char ecr_writable = priv->ecr_writable;
111 unsigned char ectr = 0;
115 ectr = inb(ECONTROL(pb));
117 new = (ectr & ~m) ^ v;
119 /* All known users of the ECR mask require bit 0 to be set. */
120 new = (new & ecr_writable) | 1;
122 pr_debug("frob_econtrol(%02x,%02x): %02x -> %02x\n", m, v, ectr, new);
124 outb(new, ECONTROL(pb));
127 static inline void frob_set_mode(struct parport *p, int mode)
129 frob_econtrol(p, ECR_MODE_MASK, mode << 5);
132 #ifdef CONFIG_PARPORT_PC_FIFO
133 /* Safely change the mode bits in the ECR
136 -EBUSY: Could not drain FIFO in some finite amount of time,
139 static int change_mode(struct parport *p, int m)
141 const struct parport_pc_private *priv = p->physport->private_data;
145 pr_debug("parport change_mode ECP-ISA to mode 0x%02x\n", m);
148 printk(KERN_DEBUG "change_mode: but there's no ECR!\n");
152 /* Bits <7:5> contain the mode. */
153 oecr = inb(ECONTROL(p));
154 mode = (oecr >> 5) & 0x7;
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;
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)
170 if (signal_pending(current))
176 while (!(inb(ECONTROL(p)) & 0x01)) {
177 if (time_after_eq(jiffies, expire))
178 /* The FIFO is stuck. */
180 schedule_timeout_interruptible(
181 msecs_to_jiffies(10));
182 if (signal_pending(current))
188 if (mode >= 2 && m >= 2) {
189 /* We have to go through mode 001 */
191 oecr |= ECR_PS2 << 5;
201 #endif /* FIFO support */
204 * Clear TIMEOUT BIT in EPP MODE
206 * This is also used in SPP detection.
208 static int clear_epp_timeout(struct parport *pb)
212 if (!(parport_pc_read_status(pb) & 0x01))
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);
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.
233 static void parport_pc_init_state(struct pardevice *dev,
234 struct parport_state *s)
238 dev->port->irq != PARPORT_IRQ_NONE)
242 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
246 static void parport_pc_save_state(struct parport *p, struct parport_state *s)
248 const struct parport_pc_private *priv = p->physport->private_data;
249 s->u.pc.ctr = priv->ctr;
251 s->u.pc.ecr = inb(ECONTROL(p));
254 static void parport_pc_restore_state(struct parport *p,
255 struct parport_state *s)
257 struct parport_pc_private *priv = p->physport->private_data;
258 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
262 ECR_WRITE(p, s->u.pc.ecr);
265 #ifdef CONFIG_PARPORT_1284
266 static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
267 size_t length, int flags)
271 if (flags & PARPORT_W91284PIC) {
272 unsigned char status;
273 size_t left = length;
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
279 status = inb(STATUS(port));
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);
287 insb(EPPDATA(port), buf, 16);
292 /* grab single byte from the warp fifo */
293 *((char *)buf) = inb(EPPDATA(port));
298 status = inb(STATUS(port));
300 /* EPP timeout should never occur... */
301 printk(KERN_DEBUG "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n",
303 clear_epp_timeout(port);
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);
318 insb(EPPDATA(port), buf, length);
319 if (inb(STATUS(port)) & 0x01) {
320 clear_epp_timeout(port);
325 for (; got < length; got++) {
326 *((char *)buf) = inb(EPPDATA(port));
328 if (inb(STATUS(port)) & 0x01) {
330 clear_epp_timeout(port);
338 static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
339 size_t length, int flags)
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);
353 outsb(EPPDATA(port), buf, length);
354 if (inb(STATUS(port)) & 0x01) {
355 clear_epp_timeout(port);
360 for (; written < length; written++) {
361 outb(*((char *)buf), EPPDATA(port));
363 if (inb(STATUS(port)) & 0x01) {
364 clear_epp_timeout(port);
372 static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
373 size_t length, int flags)
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);
385 for (; got < length; got++) {
386 *((char *)buf) = inb(EPPADDR(port));
388 if (inb(STATUS(port)) & 0x01) {
389 clear_epp_timeout(port);
397 static size_t parport_pc_epp_write_addr(struct parport *port,
398 const void *buf, size_t length,
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);
411 for (; written < length; written++) {
412 outb(*((char *)buf), EPPADDR(port));
414 if (inb(STATUS(port)) & 0x01) {
415 clear_epp_timeout(port);
423 static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
424 size_t length, int flags)
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);
437 static size_t parport_pc_ecpepp_write_data(struct parport *port,
438 const void *buf, size_t length,
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);
452 static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
453 size_t length, int flags)
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);
466 static size_t parport_pc_ecpepp_write_addr(struct parport *port,
467 const void *buf, size_t length,
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);
480 #endif /* IEEE 1284 support */
482 #ifdef CONFIG_PARPORT_PC_FIFO
483 static size_t parport_pc_fifo_write_block_pio(struct parport *port,
484 const void *buf, size_t length)
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;
495 port = port->physport;
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));
503 parport_pc_data_forward(port); /* Must be in PS2 mode */
507 unsigned char ecrval = inb(ECONTROL(port));
510 if (need_resched() && time_before(jiffies, expire))
511 /* Can't yield the port. */
514 /* Anyone else waiting for the port? */
515 if (port->waithead) {
516 printk(KERN_DEBUG "Somebody wants the port\n");
521 /* FIFO is full. Wait for interrupt. */
523 /* Clear serviceIntr */
524 ECR_WRITE(port, ecrval & ~(1<<2));
526 ret = parport_wait_event(port, HZ);
530 if (!time_before(jiffies, expire)) {
532 printk(KERN_DEBUG "FIFO write timed out\n");
535 ecrval = inb(ECONTROL(port));
536 if (!(ecrval & (1<<2))) {
537 if (need_resched() &&
538 time_before(jiffies, expire))
547 /* Can't fail now. */
548 expire = jiffies + port->cad->timeout;
551 if (signal_pending(current))
555 /* FIFO is empty. Blast it full. */
556 const int n = left < fifo_depth ? left : fifo_depth;
557 outsb(fifo, bufp, n);
561 /* Adjust the poll time. */
562 if (i < (poll_for - 2))
565 } else if (i++ < poll_for) {
567 ecrval = inb(ECONTROL(port));
571 /* Half-full(call me an optimist) */
576 dump_parport_state("leave fifo_write_block_pio", port);
577 return length - left;
581 static size_t parport_pc_fifo_write_block_dma(struct parport *port,
582 const void *buf, size_t length)
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;
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);
600 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
603 /* above 16 MB we use a bounce buffer as ISA-DMA
605 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
606 dma_addr = priv->dma_handle;
610 port = port->physport;
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));
618 parport_pc_data_forward(port); /* Must be in PS2 mode */
621 unsigned long expire = jiffies + port->physport->cad->timeout;
628 if (!dma_handle) /* bounce buffer ! */
629 memcpy(priv->dma_buf, buf, count);
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);
639 frob_econtrol(port, 1<<3, 1<<3);
641 /* Clear serviceIntr */
642 frob_econtrol(port, 1<<2, 0);
644 enable_dma(port->dma);
645 release_dma_lock(dmaflag);
647 /* assume DMA will be successful */
653 /* Wait for interrupt. */
655 ret = parport_wait_event(port, HZ);
659 if (!time_before(jiffies, expire)) {
661 printk(KERN_DEBUG "DMA write timed out\n");
664 /* Is serviceIntr set? */
665 if (!(inb(ECONTROL(port)) & (1<<2))) {
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);
677 cond_resched(); /* Can't yield the port. */
679 /* Anyone else waiting for the port? */
680 if (port->waithead) {
681 printk(KERN_DEBUG "Somebody wants the port\n");
685 /* update for possible DMA residue ! */
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);
699 /* Turn off DMA mode */
700 frob_econtrol(port, 1<<3, 0);
703 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
705 dump_parport_state("leave fifo_write_block_dma", port);
706 return length - left;
710 static inline size_t parport_pc_fifo_write_block(struct parport *port,
711 const void *buf, size_t length)
714 if (port->dma != PARPORT_DMA_NONE)
715 return parport_pc_fifo_write_block_dma(port, buf, length);
717 return parport_pc_fifo_write_block_pio(port, buf, length);
720 /* Parallel Port FIFO mode (ECP chipsets) */
721 static size_t parport_pc_compat_write_block_pio(struct parport *port,
722 const void *buf, size_t length,
727 unsigned long expire;
728 const struct parport_pc_private *priv = port->physport->private_data;
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,
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 */
741 printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
744 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
746 /* Write the data to the FIFO. */
747 written = parport_pc_fifo_write_block(port, buf, length);
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
754 expire = jiffies + (priv->fifo_depth * HZ * 4);
756 /* Wait for the FIFO to empty */
757 r = change_mode(port, ECR_PS2);
760 } while (time_before(jiffies, expire));
763 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
765 /* Prevent further data transfer. */
766 frob_set_mode(port, ECR_TST);
768 /* Adjust for the contents of the FIFO. */
769 for (written -= priv->fifo_depth; ; written++) {
770 if (inb(ECONTROL(port)) & 0x2) {
777 /* Reset the FIFO and return to PS2 mode. */
778 frob_set_mode(port, ECR_PS2);
781 r = parport_wait_peripheral(port,
783 PARPORT_STATUS_BUSY);
785 printk(KERN_DEBUG "%s: BUSY timeout (%d) in compat_write_block_pio\n",
788 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
794 #ifdef CONFIG_PARPORT_1284
795 static size_t parport_pc_ecp_write_block_pio(struct parport *port,
796 const void *buf, size_t length,
801 unsigned long expire;
802 const struct parport_pc_private *priv = port->physport->private_data;
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,
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,
815 | PARPORT_CONTROL_AUTOFD,
817 | PARPORT_CONTROL_AUTOFD);
819 /* Event 49: PError goes high. */
820 r = parport_wait_peripheral(port,
821 PARPORT_STATUS_PAPEROUT,
822 PARPORT_STATUS_PAPEROUT);
824 printk(KERN_DEBUG "%s: PError timeout (%d) in ecp_write_block_pio\n",
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,
835 r = change_mode(port, ECR_ECP); /* ECP FIFO */
837 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
839 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
841 /* Write the data to the FIFO. */
842 written = parport_pc_fifo_write_block(port, buf, length);
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
849 expire = jiffies + (priv->fifo_depth * (HZ * 4));
851 /* Wait for the FIFO to empty */
852 r = change_mode(port, ECR_PS2);
855 } while (time_before(jiffies, expire));
858 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
860 /* Prevent further data transfer. */
861 frob_set_mode(port, ECR_TST);
863 /* Adjust for the contents of the FIFO. */
864 for (written -= priv->fifo_depth; ; written++) {
865 if (inb(ECONTROL(port)) & 0x2) {
872 /* Reset the FIFO and return to PS2 mode. */
873 frob_set_mode(port, ECR_PS2);
875 /* Host transfer recovery. */
876 parport_pc_data_reverse(port); /* Must be in PS2 mode */
878 parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
879 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
881 printk(KERN_DEBUG "%s: PE,1 timeout (%d) in ecp_write_block_pio\n",
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);
891 printk(KERN_DEBUG "%s: PE,2 timeout (%d) in ecp_write_block_pio\n",
895 r = parport_wait_peripheral(port,
897 PARPORT_STATUS_BUSY);
899 printk(KERN_DEBUG "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
902 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
906 #endif /* IEEE 1284 support */
907 #endif /* Allowed to use FIFO/DMA */
911 * ******************************************
912 * INITIALISATION AND MODULE STUFF BELOW HERE
913 * ******************************************
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,
922 .write_control = parport_pc_write_control,
923 .read_control = parport_pc_read_control,
924 .frob_control = parport_pc_frob_control,
926 .read_status = parport_pc_read_status,
928 .enable_irq = parport_pc_enable_irq,
929 .disable_irq = parport_pc_disable_irq,
931 .data_forward = parport_pc_data_forward,
932 .data_reverse = parport_pc_data_reverse,
934 .init_state = parport_pc_init_state,
935 .save_state = parport_pc_save_state,
936 .restore_state = parport_pc_restore_state,
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,
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,
947 .compat_write_data = parport_ieee1284_write_compat,
948 .nibble_read_data = parport_ieee1284_read_nibble,
949 .byte_read_data = parport_ieee1284_read_byte,
951 .owner = THIS_MODULE,
954 #ifdef CONFIG_PARPORT_PC_SUPERIO
956 static struct superio_struct *find_free_superio(void)
959 for (i = 0; i < NR_SUPERIOS; i++)
960 if (superios[i].io == 0)
966 /* Super-IO chipset detection, Winbond, SMSC */
967 static void show_parconfig_smsc37c669(int io, int key)
969 int cr1, cr4, cra, cr23, cr26, cr27;
970 struct superio_struct *s;
972 static const char *const modes[] = {
973 "SPP and Bidirectional (PS/2)",
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);
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",
1003 (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
1004 (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 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");
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();
1022 pr_info("Super-IO: too many chips!\n");
1039 if (d == 1 || d == 3)
1042 s->dma = PARPORT_DMA_NONE;
1048 static void show_parconfig_winbond(int io, int key)
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 */
1058 "EPP-1.7 and SPP", /* 5 */
1060 "ECP and EPP-1.7" };
1061 static char *const irqtypes[] = {
1062 "pulsed low, high-Z",
1065 /* The registers are called compatible-PnP because the
1066 register layout is modelled after ISA-PnP, the access
1067 method is just another ... */
1070 outb(0x07, io); /* Register 7: Select Logical Device */
1071 outb(0x01, io + 1); /* LD1 is Parallel Port */
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");
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]);
1101 if (cr30 & 0x01) { /* the settings can be interrogated later ... */
1102 s = find_free_superio();
1104 pr_info("Super-IO: too many chips!\n");
1106 s->io = (cr60 << 8) | cr61;
1107 s->irq = cr70 & 0x0f;
1108 s->dma = (((cr74 & 0x07) > 3) ?
1109 PARPORT_DMA_NONE : (cr74 & 0x07));
1114 static void decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1116 const char *type = "unknown";
1119 if (devid == devrev)
1120 /* simple heuristics, we happened to read some
1121 non-winbond register */
1124 id = (devid << 8) | devrev;
1126 /* Values are from public data sheets pdf files, I can just
1127 confirm 83977TF is correct :-) */
1130 else if (id == 0x9773)
1131 type = "83977TF / SMSC 97w33x/97w34x";
1132 else if (id == 0x9774)
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)
1140 else if ((id & ~0x0f) == 0x6010)
1142 else if ((oldid & 0x0f) == 0x0a) {
1145 } else if ((oldid & 0x0f) == 0x0b) {
1148 } else if ((oldid & 0x0f) == 0x0c) {
1151 } else if ((oldid & 0x0f) == 0x0d) {
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);
1162 show_parconfig_winbond(efer, key);
1165 static void decode_smsc(int efer, int key, int devid, int devrev)
1167 const char *type = "unknown";
1168 void (*func)(int io, int key);
1171 if (devid == devrev)
1172 /* simple heuristics, we happened to read some
1173 non-smsc register */
1177 id = (devid << 8) | devrev;
1181 func = show_parconfig_smsc37c669;
1182 } else if (id == 0x6582)
1184 else if (devid == 0x65)
1186 else if (devid == 0x66)
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);
1198 static void winbond_check(int io, int key)
1200 int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1202 if (!request_region(io, 3, __func__))
1205 origval = inb(io); /* Save original value */
1207 /* First probe without key */
1209 x_devid = inb(io + 1);
1211 x_devrev = inb(io + 1);
1213 x_oldid = inb(io + 1);
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 */
1221 devrev = inb(io + 1);
1223 oldid = inb(io + 1);
1224 outb(0xaa, io); /* Magic Seal */
1226 outb(origval, io); /* in case we poked some entirely different hardware */
1228 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1229 goto out; /* protection against false positives */
1231 decode_winbond(io, key, devid, devrev, oldid);
1233 release_region(io, 3);
1236 static void winbond_check2(int io, int key)
1238 int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1240 if (!request_region(io, 3, __func__))
1243 origval[0] = inb(io); /* Save original values */
1244 origval[1] = inb(io + 1);
1245 origval[2] = inb(io + 2);
1247 /* First probe without the key */
1249 x_devid = inb(io + 2);
1251 x_devrev = inb(io + 2);
1253 x_oldid = inb(io + 2);
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 */
1260 devrev = inb(io + 2);
1262 oldid = inb(io + 2);
1263 outb(0xaa, io); /* Magic Seal */
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);
1269 if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
1270 goto out; /* protection against false positives */
1272 decode_winbond(io, key, devid, devrev, oldid);
1274 release_region(io, 3);
1277 static void smsc_check(int io, int key)
1279 int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
1281 if (!request_region(io, 3, __func__))
1284 origval = inb(io); /* Save original value */
1286 /* First probe without the key */
1288 x_oldid = inb(io + 1);
1290 x_oldrev = inb(io + 1);
1294 x_rev = inb(io + 1);
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 */
1302 oldrev = inb(io + 1);
1307 outb(0xaa, io); /* Magic Seal */
1309 outb(origval, io); /* in case we poked some entirely different hardware */
1311 if (x_id == id && x_oldrev == oldrev &&
1312 x_oldid == oldid && x_rev == rev)
1313 goto out; /* protection against false positives */
1315 decode_smsc(io, key, oldid, oldrev);
1317 release_region(io, 3);
1321 static void detect_and_report_winbond(void)
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);
1334 static void detect_and_report_smsc(void)
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);
1344 static void detect_and_report_it87(void)
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__))
1352 origval = inb(0x2e); /* Save original value */
1358 dev = inb(0x2f) << 8;
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 */
1366 outb(0xF0, 0x2E); /* BOOT 0x80 off */
1370 outb(0x02, 0x2E); /* Lock */
1373 outb(origval, 0x2e); /* Oops, sorry to disturb */
1375 release_region(0x2e, 2);
1377 #endif /* CONFIG_PARPORT_PC_SUPERIO */
1379 static struct superio_struct *find_superio(struct parport *p)
1382 for (i = 0; i < NR_SUPERIOS; i++)
1383 if (superios[i].io == p->base)
1384 return &superios[i];
1388 static int get_superio_dma(struct parport *p)
1390 struct superio_struct *s = find_superio(p);
1393 return PARPORT_DMA_NONE;
1396 static int get_superio_irq(struct parport *p)
1398 struct superio_struct *s = find_superio(p);
1401 return PARPORT_IRQ_NONE;
1405 /* --- Mode detection ------------------------------------- */
1408 * Checks for port existence, all ports support SPP MODE
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!)
1416 static int parport_SPP_supported(struct parport *pb)
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
1426 clear_epp_timeout(pb);
1428 /* Do a simple read-write test to make sure the port exists. */
1430 outb(w, CONTROL(pb));
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
1437 r = inb(CONTROL(pb));
1438 if ((r & 0xf) == w) {
1440 outb(w, CONTROL(pb));
1441 r = inb(CONTROL(pb));
1442 outb(0xc, CONTROL(pb));
1444 return PARPORT_MODE_PCSPP;
1448 /* That didn't work, but the user thinks there's a
1450 pr_info("parport 0x%lx (WARNING): CTR: wrote 0x%02x, read 0x%02x\n",
1453 /* Try the data register. The data lines aren't tri-stated at
1454 * this stage, so we expect back what we wrote. */
1456 parport_pc_write_data(pb, w);
1457 r = parport_pc_read_data(pb);
1460 parport_pc_write_data(pb, w);
1461 r = parport_pc_read_data(pb);
1463 return PARPORT_MODE_PCSPP;
1466 if (user_specified) {
1467 /* Didn't work, but the user is convinced this is the
1469 pr_info("parport 0x%lx (WARNING): DATA: wrote 0x%02x, read 0x%02x\n",
1471 pr_info("parport 0x%lx: You gave this address, but there is probably no parallel port there!\n",
1475 /* It's possible that we can't read the control register or
1476 * the data register. In that case just believe the user. */
1478 return PARPORT_MODE_PCSPP;
1485 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1486 * on these cards actually accesses the CTR.
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
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.
1496 static int parport_ECR_present(struct parport *pb)
1498 struct parport_pc_private *priv = pb->private_data;
1499 unsigned char r = 0xc;
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 */
1506 r = inb(CONTROL(pb));
1507 if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
1508 /* Sure that no ECR register exists */
1512 if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
1515 ECR_WRITE(pb, 0x34);
1516 if (inb(ECONTROL(pb)) != 0x35)
1521 outb(0xc, CONTROL(pb));
1523 /* Go to mode 000 */
1524 frob_set_mode(pb, ECR_SPP);
1529 outb(0xc, CONTROL(pb));
1533 #ifdef CONFIG_PARPORT_1284
1534 /* Detect PS/2 support.
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.
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.
1551 static int parport_PS2_supported(struct parport *pb)
1555 clear_epp_timeout(pb);
1557 /* try to tri-state the buffer */
1558 parport_pc_data_reverse(pb);
1560 parport_pc_write_data(pb, 0x55);
1561 if (parport_pc_read_data(pb) != 0x55)
1564 parport_pc_write_data(pb, 0xaa);
1565 if (parport_pc_read_data(pb) != 0xaa)
1568 /* cancel input mode */
1569 parport_pc_data_forward(pb);
1572 pb->modes |= PARPORT_MODE_TRISTATE;
1574 struct parport_pc_private *priv = pb->private_data;
1575 priv->ctr_writable &= ~0x20;
1581 #ifdef CONFIG_PARPORT_PC_FIFO
1582 static int parport_ECP_supported(struct parport *pb)
1585 int config, configb;
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 };
1591 /* If there is no ECR, we have no hope of supporting ECP. */
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));
1602 * Using LGS chipset it uses ECR register, but
1603 * it doesn't support ECP or FIFO MODE
1606 ECR_WRITE(pb, ECR_SPP << 5);
1610 priv->fifo_depth = i;
1611 if (verbose_probing)
1612 printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
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++) {
1620 if (inb(ECONTROL(pb)) & (1<<2))
1624 if (i <= priv->fifo_depth) {
1625 if (verbose_probing)
1626 printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1629 /* Number of bytes we know we can write if we get an
1633 priv->writeIntrThreshold = i;
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))
1647 if (i <= priv->fifo_depth) {
1648 if (verbose_probing)
1649 pr_info("0x%lx: readIntrThreshold is %d\n",
1652 /* Number of bytes we can read if we get an interrupt. */
1655 priv->readIntrThreshold = i;
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;
1664 pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
1668 pr_warn("0x%lx: Unsupported pword size!\n", pb->base);
1671 pr_warn("0x%lx: Unknown implementation ID\n", pb->base);
1672 fallthrough; /* Assume 1 */
1676 priv->pword = pword;
1678 if (verbose_probing) {
1679 printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
1680 pb->base, 8 * pword);
1682 printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n",
1683 pb->base, config & 0x80 ? "Level" : "Pulses");
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]);
1692 pr_cont("<none or set by other means>");
1694 if ((configb & 0x03) == 0x00)
1695 pr_cont("<none or set by other means>\n");
1697 pr_cont("%d\n", configb & 0x07);
1700 /* Go back to mode 000 */
1701 frob_set_mode(pb, ECR_SPP);
1707 #ifdef CONFIG_X86_32
1708 static int intel_bug_present_check_epp(struct parport *pb)
1710 const struct parport_pc_private *priv = pb->private_data;
1711 int bug_present = 0;
1714 /* store value of ECR */
1715 unsigned char ecr = inb(ECONTROL(pb));
1717 for (i = 0x00; i < 0x80; i += 0x20) {
1719 if (clear_epp_timeout(pb)) {
1720 /* Phony EPP in ECP. */
1725 /* return ECR into the inital state */
1731 static int intel_bug_present(struct parport *pb)
1733 /* Check whether the device is legacy, not PCI or PCMCIA. Only legacy is known to be affected. */
1734 if (pb->dev != NULL) {
1738 return intel_bug_present_check_epp(pb);
1741 static int intel_bug_present(struct parport *pb)
1745 #endif /* CONFIG_X86_32 */
1747 static int parport_ECPPS2_supported(struct parport *pb)
1749 const struct parport_pc_private *priv = pb->private_data;
1756 oecr = inb(ECONTROL(pb));
1757 ECR_WRITE(pb, ECR_PS2 << 5);
1758 result = parport_PS2_supported(pb);
1759 ECR_WRITE(pb, oecr);
1763 /* EPP mode detection */
1765 static int parport_EPP_supported(struct parport *pb)
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).
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.
1780 /* If EPP timeout bit clear then EPP available */
1781 if (!clear_epp_timeout(pb))
1782 return 0; /* No way to clear timeout */
1784 /* Check for Intel bug. */
1785 if (intel_bug_present(pb))
1788 pb->modes |= PARPORT_MODE_EPP;
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;
1799 static int parport_ECPEPP_supported(struct parport *pb)
1801 struct parport_pc_private *priv = pb->private_data;
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);
1814 ECR_WRITE(pb, oecr);
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;
1827 #else /* No IEEE 1284 support */
1829 /* Don't bother probing for modes we know we won't use. */
1830 static int parport_PS2_supported(struct parport *pb) { return 0; }
1831 #ifdef CONFIG_PARPORT_PC_FIFO
1832 static int parport_ECP_supported(struct parport *pb)
1837 static int parport_EPP_supported(struct parport *pb)
1842 static int parport_ECPEPP_supported(struct parport *pb)
1847 static int parport_ECPPS2_supported(struct parport *pb)
1852 #endif /* No IEEE 1284 support */
1854 /* --- IRQ detection -------------------------------------- */
1856 /* Only if supports ECP mode */
1857 static int programmable_irq_support(struct parport *pb)
1860 unsigned char oecr = inb(ECONTROL(pb));
1861 static const int lookup[8] = {
1862 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1865 ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
1867 intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
1868 irq = lookup[intrLine];
1870 ECR_WRITE(pb, oecr);
1874 static int irq_probe_ECP(struct parport *pb)
1879 irqs = probe_irq_on();
1881 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1882 ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
1883 ECR_WRITE(pb, ECR_TST << 5);
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));
1889 pb->irq = probe_irq_off(irqs);
1890 ECR_WRITE(pb, ECR_SPP << 5);
1893 pb->irq = PARPORT_IRQ_NONE;
1899 * This detection seems that only works in National Semiconductors
1900 * This doesn't work in SMC, LGS, and Winbond
1902 static int irq_probe_EPP(struct parport *pb)
1904 #ifndef ADVANCED_DETECT
1905 return PARPORT_IRQ_NONE;
1910 if (pb->modes & PARPORT_MODE_PCECR)
1911 oecr = inb(ECONTROL(pb));
1913 irqs = probe_irq_on();
1915 if (pb->modes & PARPORT_MODE_PCECR)
1916 frob_econtrol(pb, 0x10, 0x10);
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);
1923 /* Device isn't expecting an EPP read
1924 * and generates an IRQ.
1926 parport_pc_read_epp(pb);
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);
1935 pb->irq = PARPORT_IRQ_NONE;
1938 #endif /* Advanced detection */
1941 static int irq_probe_SPP(struct parport *pb)
1943 /* Don't even try to do this. */
1944 return PARPORT_IRQ_NONE;
1947 /* We will attempt to share interrupt requests since other devices
1948 * such as sound cards and network cards seem to like using the
1951 * When ECP is available we can autoprobe for IRQs.
1952 * NOTE: If we can autoprobe it, we can register the IRQ.
1954 static int parport_irq_probe(struct parport *pb)
1956 struct parport_pc_private *priv = pb->private_data;
1959 pb->irq = programmable_irq_support(pb);
1961 if (pb->irq == PARPORT_IRQ_NONE)
1962 pb->irq = irq_probe_ECP(pb);
1965 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
1966 (pb->modes & PARPORT_MODE_EPP))
1967 pb->irq = irq_probe_EPP(pb);
1969 clear_epp_timeout(pb);
1971 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
1972 pb->irq = irq_probe_EPP(pb);
1974 clear_epp_timeout(pb);
1976 if (pb->irq == PARPORT_IRQ_NONE)
1977 pb->irq = irq_probe_SPP(pb);
1979 if (pb->irq == PARPORT_IRQ_NONE)
1980 pb->irq = get_superio_irq(pb);
1985 /* --- DMA detection -------------------------------------- */
1987 /* Only if chipset conforms to ECP ISA Interface Standard */
1988 static int programmable_dma_support(struct parport *p)
1990 unsigned char oecr = inb(ECONTROL(p));
1993 frob_set_mode(p, ECR_CNF);
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;
2005 static int parport_dma_probe(struct parport *p)
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);
2020 /* --- Initialisation code -------------------------------- */
2022 static LIST_HEAD(ports_list);
2023 static DEFINE_SPINLOCK(ports_lock);
2025 static struct parport *__parport_pc_probe_port(unsigned long int base,
2026 unsigned long int base_hi,
2030 unsigned int mode_mask,
2031 unsigned char ecr_writable)
2033 struct parport_pc_private *priv;
2034 struct parport_operations *ops;
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;
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",
2052 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
2054 dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
2055 dma = PARPORT_DMA_NONE;
2059 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
2063 priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
2067 /* a misnomer, actually - it's allocate and reserve parport number */
2068 p = parport_register_port(base, irq, dma, ops);
2072 base_res = request_region(base, 3, p->name);
2076 memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
2078 priv->ctr_writable = ~0x10;
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);
2088 p->base_hi = base_hi;
2089 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2090 p->private_data = priv;
2093 ECR_res = request_region(base_hi, 3, p->name);
2095 parport_ECR_present(p);
2098 if (base != 0x3bc) {
2099 EPP_res = request_region(base+0x3, 5, p->name);
2101 if (!parport_EPP_supported(p))
2102 parport_ECPEPP_supported(p);
2104 if (!parport_SPP_supported(p))
2108 parport_ECPPS2_supported(p);
2110 parport_PS2_supported(p);
2112 p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
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);
2124 p->irq = PARPORT_IRQ_NONE;
2126 if (p->irq != PARPORT_IRQ_NONE) {
2127 pr_cont(", irq %d", p->irq);
2128 priv->ctr_writable |= 0x10;
2130 if (p->dma == PARPORT_DMA_AUTO) {
2131 p->dma = PARPORT_DMA_NONE;
2132 parport_dma_probe(p);
2135 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2136 is mandatory (see above) */
2137 p->dma = PARPORT_DMA_NONE;
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;
2147 /* We can't use the DMA channel after all. */
2148 p->dma = PARPORT_DMA_NONE;
2149 #endif /* Allowed to use FIFO/DMA */
2151 p->modes &= ~mode_mask;
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;
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);
2164 pr_cont(", using FIFO");
2166 #endif /* Allowed to use FIFO/DMA */
2170 #define printmode(x) \
2172 if (p->modes & PARPORT_MODE_##x) \
2173 pr_cont("%s%s", f++ ? "," : "", #x); \
2179 printmode(TRISTATE);
2186 #ifndef CONFIG_PARPORT_1284
2188 #endif /* CONFIG_PARPORT_1284 */
2190 if (probedirq != PARPORT_IRQ_NONE)
2191 pr_info("%s: irq %d detected\n", p->name, probedirq);
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);
2198 /* Likewise for EEP ports */
2199 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2200 release_region(base+3, 5);
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",
2208 p->irq = PARPORT_IRQ_NONE;
2209 p->dma = PARPORT_DMA_NONE;
2212 #ifdef CONFIG_PARPORT_PC_FIFO
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",
2218 p->dma = PARPORT_DMA_NONE;
2221 dma_alloc_coherent(dev,
2225 if (!priv->dma_buf) {
2226 pr_warn("%s: cannot get buffer for DMA, resorting to PIO operation\n",
2229 p->dma = PARPORT_DMA_NONE;
2237 /* Done probing. Now put the port into a sensible start-up state. */
2240 * Put the ECP detected port in PS2 mode.
2241 * Do this also for ports that have ECR but don't do ECP.
2245 parport_pc_write_data(p, 0);
2246 parport_pc_data_forward(p);
2248 /* Now that we've told the sharing engine about the port, and
2249 found out its characteristics, let the high-level drivers
2251 spin_lock(&ports_lock);
2252 list_add(&priv->list, &ports_list);
2253 spin_unlock(&ports_lock);
2254 parport_announce_port(p);
2260 release_region(base_hi, 3);
2262 release_region(base+0x3, 5);
2263 release_region(base, 3);
2265 parport_del_port(p);
2272 platform_device_unregister(pdev);
2276 struct parport *parport_pc_probe_port(unsigned long int base,
2277 unsigned long int base_hi,
2282 return __parport_pc_probe_port(base, base_hi, irq, dma,
2283 dev, irqflags, 0, 0);
2285 EXPORT_SYMBOL(parport_pc_probe_port);
2287 void parport_pc_unregister_port(struct parport *p)
2289 struct parport_pc_private *priv = p->private_data;
2290 struct parport_operations *ops = p->ops;
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)
2300 if (p->irq != PARPORT_IRQ_NONE)
2301 free_irq(p->irq, p);
2302 release_region(p->base, 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)
2309 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2313 kfree(p->private_data);
2314 parport_del_port(p);
2315 kfree(ops); /* hope no-one cached it */
2317 EXPORT_SYMBOL(parport_pc_unregister_port);
2321 /* ITE support maintained by Rich Liu <richliu@poorman.org> */
2322 static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
2323 const struct parport_pc_via_data *via)
2325 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2327 u32 ite8872_lpt, ite8872_lpthi;
2328 u8 ite8872_irq, type;
2332 pr_debug("sio_ite_8872_probe()\n");
2334 /* make sure which one chip */
2335 for (i = 0; i < 5; i++) {
2336 if (request_region(inta_addr[i], 32, "it887x")) {
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]);
2345 release_region(inta_addr[i], 32);
2349 pr_info("parport_pc: cannot find ITE8872 INTA\n");
2353 type = inb(inta_addr[i] + 0x18);
2358 pr_info("parport_pc: ITE8871 found (1P)\n");
2359 ite8872set = 0x64200000;
2362 pr_info("parport_pc: ITE8875 found (1P)\n");
2363 ite8872set = 0x64200000;
2366 pr_info("parport_pc: ITE8872 found (2S1P)\n");
2367 ite8872set = 0x64e00000;
2370 pr_info("parport_pc: ITE8873 found (1S)\n");
2371 release_region(inta_addr[i], 32);
2374 pr_info("parport_pc: ITE8874 found (2S)\n");
2375 release_region(inta_addr[i], 32);
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);
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));
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);
2401 /* Let the user (or defaults) steer us away from interrupts */
2403 if (autoirq != PARPORT_IRQ_AUTO)
2404 irq = PARPORT_IRQ_NONE;
2407 * Release the resource so that parport_pc_probe_port can get it.
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",
2414 if (irq != PARPORT_IRQ_NONE)
2415 pr_cont(", irq=%d", irq);
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;
2427 /* Data for two known VIA chips */
2428 static struct parport_pc_via_data via_686a_data = {
2437 static struct parport_pc_via_data via_8231_data = {
2447 static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma,
2448 const struct parport_pc_via_data *via)
2450 u8 tmp, tmp2, siofunc;
2453 unsigned port1, port2;
2454 unsigned have_epp = 0;
2456 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2458 switch (parport_init_mode) {
2460 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2461 siofunc = VIA_FUNCTION_PARPORT_SPP;
2464 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2465 siofunc = VIA_FUNCTION_PARPORT_SPP;
2466 ppcontrol = VIA_PARPORT_BIDIR;
2469 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2470 siofunc = VIA_FUNCTION_PARPORT_EPP;
2471 ppcontrol = VIA_PARPORT_BIDIR;
2475 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2476 siofunc = VIA_FUNCTION_PARPORT_ECP;
2477 ppcontrol = VIA_PARPORT_BIDIR;
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;
2486 printk(KERN_DEBUG "parport_pc: probing current configuration\n");
2487 siofunc = VIA_FUNCTION_PROBE;
2491 * unlock super i/o configuration
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);
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;
2507 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2509 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2510 outb(tmp, VIA_CONFIG_DATA);
2511 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2513 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2514 outb(tmp2, VIA_CONFIG_DATA);
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;
2521 printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
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");
2531 * lock super i/o configuration
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);
2537 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2538 pr_info("parport_pc: VIA parallel port disabled in BIOS\n");
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);
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);
2551 /* if ECP not enabled, DMA is not enabled, assumed
2552 bogus 'dma' value */
2553 dma = PARPORT_DMA_NONE;
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;
2560 if (autodma == PARPORT_DMA_NONE)
2561 dma = PARPORT_DMA_NONE;
2565 port2 = 0x7bc; break;
2567 port2 = 0x778; break;
2569 port2 = 0x678; break;
2571 pr_info("parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2576 /* filter bogus IRQs */
2582 irq = PARPORT_IRQ_NONE;
2585 default: /* do nothing */
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);
2600 pr_warn("parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
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 */
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, },
2624 enum parport_pc_pci_cards {
2625 siig_1p_10x = last_sio,
2630 lava_parallel_dual_a,
2631 lava_parallel_dual_b,
2664 /* each element directly indexed from enum list, above
2665 * (but offset by last_sio) */
2666 static struct parport_pc_pci {
2668 struct { /* BAR (base address registers) numbers in the config
2672 /* -1 if not there, >6 for offset-method (max BAR is 6) */
2675 /* Bit field of parport modes to exclude. */
2676 unsigned int mode_mask;
2678 /* If non-zero, sets the bitmask of writable ECR bits. In that
2679 * case additionally bit 0 will be forcibly set on writes. */
2680 unsigned char ecr_writable;
2682 /* If set, this is called immediately after pci_enable_device.
2683 * If it returns non-zero, no probing will take place and the
2684 * ports will not be used. */
2685 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2687 /* If set, this is called after probing for ports. If 'failed'
2688 * is non-zero we couldn't use any of the ports. */
2689 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2691 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2692 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2693 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2694 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2695 /* lava_parallel */ { 1, { { 0, -1 }, } },
2696 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2697 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2698 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2699 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2700 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2701 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2702 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2703 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2704 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2705 /* SYBA uses fixed offsets in
2707 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2708 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2709 /* titan_010l */ { 1, { { 3, -1 }, } },
2710 /* avlab_1p */ { 1, { { 0, 1}, } },
2711 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2712 /* The Oxford Semi cards are unusual: older variants of 954 don't
2713 * support ECP, and 840 locks up if you write 1 to bit 2! None
2714 * implement nFault or service interrupts and all require 00001
2715 * bit pattern to be used for bits 4:0 with ECR writes. */
2716 /* oxsemi_952 */ { 1, { { 0, 1 }, },
2717 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2718 /* oxsemi_954 */ { 1, { { 0, 1 }, },
2720 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2721 /* oxsemi_840 */ { 1, { { 0, 1 }, },
2722 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2723 /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, },
2724 PARPORT_MODE_COMPAT, ECR_MODE_MASK },
2725 /* aks_0100 */ { 1, { { 0, -1 }, } },
2726 /* mobility_pp */ { 1, { { 0, 1 }, } },
2727 /* netmos_9900 */ { 1, { { 0, -1 }, } },
2729 /* The netmos entries below are untested */
2730 /* netmos_9705 */ { 1, { { 0, -1 }, } },
2731 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
2732 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
2733 /* netmos_9805 */ { 1, { { 0, 1 }, } },
2734 /* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2735 /* netmos_9901 */ { 1, { { 0, -1 }, } },
2736 /* netmos_9865 */ { 1, { { 0, -1 }, } },
2737 /* asix_ax99100 */ { 1, { { 0, 1 }, } },
2738 /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
2739 /* wch_ch382l */ { 1, { { 2, -1 }, } },
2742 static const struct pci_device_id parport_pc_pci_tbl[] = {
2743 /* Super-IO onboard chips */
2744 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2745 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2746 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2747 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2750 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2751 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2752 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2753 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2754 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2755 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2756 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2757 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2758 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2759 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2760 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2761 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2762 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2763 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2764 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2765 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2766 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2767 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
2768 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2769 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2770 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2771 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2772 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2773 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2774 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2775 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2776 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2777 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2778 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2779 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2780 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2781 /* AFAVLAB_TK9902 */
2782 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
2783 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2784 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2785 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2786 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2787 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2788 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2789 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2790 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
2791 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2792 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
2793 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2794 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
2795 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2796 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
2797 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2798 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
2799 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2800 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
2801 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2802 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
2803 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2804 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
2805 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2806 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2807 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2808 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2809 /* NetMos communication controllers */
2810 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900,
2811 0xA000, 0x2000, 0, 0, netmos_9900 },
2812 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2813 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2814 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2815 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2816 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2817 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2818 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2819 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2820 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2821 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2822 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
2823 0xA000, 0x2000, 0, 0, netmos_9901 },
2824 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2825 0xA000, 0x1000, 0, 0, netmos_9865 },
2826 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2827 0xA000, 0x2000, 0, 0, netmos_9865 },
2828 /* ASIX AX99100 PCIe to Multi I/O Controller */
2829 { PCI_VENDOR_ID_ASIX, PCI_DEVICE_ID_ASIX_AX99100,
2830 0xA000, 0x2000, 0, 0, asix_ax99100 },
2831 /* Quatech SPPXP-100 Parallel port PCI ExpressCard */
2832 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
2833 PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
2834 /* WCH CH382L PCI-E single parallel port card */
2835 { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l },
2836 { 0, } /* terminate list */
2838 MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
2840 struct pci_parport_data {
2842 struct parport *ports[2];
2845 static int parport_pc_pci_probe(struct pci_dev *dev,
2846 const struct pci_device_id *id)
2848 int err, count, n, i = id->driver_data;
2849 struct pci_parport_data *data;
2852 /* This is an onboard Super-IO and has already been probed */
2855 /* This is a PCI card */
2858 err = pci_enable_device(dev);
2862 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2866 if (cards[i].preinit_hook &&
2867 cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2872 for (n = 0; n < cards[i].numports; n++) {
2873 int lo = cards[i].addr[n].lo;
2874 int hi = cards[i].addr[n].hi;
2876 unsigned long io_lo, io_hi;
2877 io_lo = pci_resource_start(dev, lo);
2879 if ((hi >= 0) && (hi <= 6))
2880 io_hi = pci_resource_start(dev, hi);
2882 io_lo += hi; /* Reinterpret the meaning of
2883 "hi" as an offset (see SYBA
2885 /* TODO: test if sharing interrupts works */
2887 if (irq == IRQ_NONE) {
2888 printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
2889 id->vendor, id->device, io_lo, io_hi);
2890 irq = PARPORT_IRQ_NONE;
2892 printk(KERN_DEBUG "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
2893 id->vendor, id->device, io_lo, io_hi, irq);
2895 data->ports[count] =
2896 __parport_pc_probe_port(io_lo, io_hi, irq,
2897 PARPORT_DMA_NONE, &dev->dev,
2900 cards[i].ecr_writable);
2901 if (data->ports[count])
2907 if (cards[i].postinit_hook)
2908 cards[i].postinit_hook(dev, count == 0);
2911 pci_set_drvdata(dev, data);
2920 static void parport_pc_pci_remove(struct pci_dev *dev)
2922 struct pci_parport_data *data = pci_get_drvdata(dev);
2926 for (i = data->num - 1; i >= 0; i--)
2927 parport_pc_unregister_port(data->ports[i]);
2933 static struct pci_driver parport_pc_pci_driver = {
2934 .name = "parport_pc",
2935 .id_table = parport_pc_pci_tbl,
2936 .probe = parport_pc_pci_probe,
2937 .remove = parport_pc_pci_remove,
2940 static int __init parport_pc_init_superio(int autoirq, int autodma)
2942 const struct pci_device_id *id;
2943 struct pci_dev *pdev = NULL;
2946 for_each_pci_dev(pdev) {
2947 id = pci_match_id(parport_pc_pci_tbl, pdev);
2948 if (id == NULL || id->driver_data >= last_sio)
2951 if (parport_pc_superio_info[id->driver_data].probe(
2952 pdev, autoirq, autodma,
2953 parport_pc_superio_info[id->driver_data].via)) {
2958 return ret; /* number of devices found */
2961 static struct pci_driver parport_pc_pci_driver;
2962 static int __init parport_pc_init_superio(int autoirq, int autodma)
2966 #endif /* CONFIG_PCI */
2970 static const struct pnp_device_id parport_pc_pnp_tbl[] = {
2971 /* Standard LPT Printer Port */
2972 {.id = "PNP0400", .driver_data = 0},
2973 /* ECP Printer Port */
2974 {.id = "PNP0401", .driver_data = 0},
2978 MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
2980 static int parport_pc_pnp_probe(struct pnp_dev *dev,
2981 const struct pnp_device_id *id)
2983 struct parport *pdata;
2984 unsigned long io_lo, io_hi;
2987 if (pnp_port_valid(dev, 0) &&
2988 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
2989 io_lo = pnp_port_start(dev, 0);
2993 if (pnp_port_valid(dev, 1) &&
2994 !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
2995 io_hi = pnp_port_start(dev, 1);
2999 if (pnp_irq_valid(dev, 0) &&
3000 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
3001 irq = pnp_irq(dev, 0);
3003 irq = PARPORT_IRQ_NONE;
3005 if (pnp_dma_valid(dev, 0) &&
3006 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
3007 dma = pnp_dma(dev, 0);
3009 dma = PARPORT_DMA_NONE;
3011 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
3012 pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
3016 pnp_set_drvdata(dev, pdata);
3020 static void parport_pc_pnp_remove(struct pnp_dev *dev)
3022 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
3026 parport_pc_unregister_port(pdata);
3029 /* we only need the pnp layer to activate the device, at least for now */
3030 static struct pnp_driver parport_pc_pnp_driver = {
3031 .name = "parport_pc",
3032 .id_table = parport_pc_pnp_tbl,
3033 .probe = parport_pc_pnp_probe,
3034 .remove = parport_pc_pnp_remove,
3038 static struct pnp_driver parport_pc_pnp_driver;
3039 #endif /* CONFIG_PNP */
3041 static int parport_pc_platform_probe(struct platform_device *pdev)
3043 /* Always succeed, the actual probing is done in
3044 * parport_pc_probe_port(). */
3048 static struct platform_driver parport_pc_platform_driver = {
3050 .name = "parport_pc",
3052 .probe = parport_pc_platform_probe,
3055 /* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3056 static int __attribute__((unused))
3057 parport_pc_find_isa_ports(int autoirq, int autodma)
3061 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
3063 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
3065 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
3071 /* This function is called by parport_pc_init if the user didn't
3072 * specify any ports to probe. Its job is to find some ports. Order
3073 * is important here -- we want ISA ports to be registered first,
3074 * followed by PCI cards (for least surprise), but before that we want
3075 * to do chipset-specific tests for some onboard ports that we know
3078 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3079 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3081 static void __init parport_pc_find_ports(int autoirq, int autodma)
3085 #ifdef CONFIG_PARPORT_PC_SUPERIO
3086 detect_and_report_it87();
3087 detect_and_report_winbond();
3088 detect_and_report_smsc();
3091 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3092 count += parport_pc_init_superio(autoirq, autodma);
3094 /* PnP ports, skip detection if SuperIO already found them */
3096 err = pnp_register_driver(&parport_pc_pnp_driver);
3098 pnp_registered_parport = 1;
3101 /* ISA ports and whatever (see asm/parport.h). */
3102 parport_pc_find_nonpci_ports(autoirq, autodma);
3104 err = pci_register_driver(&parport_pc_pci_driver);
3106 pci_registered_parport = 1;
3110 * Piles of crap below pretend to be a parser for module and kernel
3111 * parameters. Say "thank you" to whoever had come up with that
3112 * syntax and keep in mind that code below is a cleaned up version.
3115 static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
3116 [0 ... PARPORT_PC_MAX_PORTS] = 0
3118 static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
3119 [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
3121 static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
3122 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
3124 static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
3125 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
3128 static int __init parport_parse_param(const char *s, int *val,
3129 int automatic, int none, int nofifo)
3133 if (!strncmp(s, "auto", 4))
3135 else if (!strncmp(s, "none", 4))
3137 else if (nofifo && !strncmp(s, "nofifo", 6))
3141 unsigned long r = simple_strtoul(s, &ep, 0);
3145 pr_err("parport: bad specifier `%s'\n", s);
3152 static int __init parport_parse_irq(const char *irqstr, int *val)
3154 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3155 PARPORT_IRQ_NONE, 0);
3158 static int __init parport_parse_dma(const char *dmastr, int *val)
3160 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3161 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3165 static int __init parport_init_mode_setup(char *str)
3167 printk(KERN_DEBUG "parport_pc.c: Specified parameter parport_init_mode=%s\n",
3170 if (!strcmp(str, "spp"))
3171 parport_init_mode = 1;
3172 if (!strcmp(str, "ps2"))
3173 parport_init_mode = 2;
3174 if (!strcmp(str, "epp"))
3175 parport_init_mode = 3;
3176 if (!strcmp(str, "ecp"))
3177 parport_init_mode = 4;
3178 if (!strcmp(str, "ecpepp"))
3179 parport_init_mode = 5;
3185 static char *irq[PARPORT_PC_MAX_PORTS];
3186 static char *dma[PARPORT_PC_MAX_PORTS];
3188 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3189 module_param_hw_array(io, int, ioport, NULL, 0);
3190 MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3191 module_param_hw_array(io_hi, int, ioport, NULL, 0);
3192 MODULE_PARM_DESC(irq, "IRQ line");
3193 module_param_hw_array(irq, charp, irq, NULL, 0);
3194 MODULE_PARM_DESC(dma, "DMA channel");
3195 module_param_hw_array(dma, charp, dma, NULL, 0);
3196 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3197 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3198 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3199 module_param(verbose_probing, int, 0644);
3202 static char *init_mode;
3203 MODULE_PARM_DESC(init_mode,
3204 "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3205 module_param(init_mode, charp, 0);
3208 static int __init parse_parport_params(void)
3215 parport_init_mode_setup(init_mode);
3218 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3219 if (parport_parse_irq(irq[i], &val))
3222 if (parport_parse_dma(dma[i], &val))
3227 /* The user can make us use any IRQs or DMAs we find. */
3228 if (irq[0] && !parport_parse_irq(irq[0], &val))
3230 case PARPORT_IRQ_NONE:
3231 case PARPORT_IRQ_AUTO:
3235 pr_warn("parport_pc: irq specified without base address. Use 'io=' to specify one\n");
3238 if (dma[0] && !parport_parse_dma(dma[0], &val))
3240 case PARPORT_DMA_NONE:
3241 case PARPORT_DMA_AUTO:
3245 pr_warn("parport_pc: dma specified without base address. Use 'io=' to specify one\n");
3253 static int parport_setup_ptr __initdata;
3256 * Acceptable parameters:
3260 * parport=0xBASE[,IRQ[,DMA]]
3262 * IRQ/DMA may be numeric or 'auto' or 'none'
3264 static int __init parport_setup(char *str)
3270 if (!str || !*str || (*str == '0' && !*(str+1))) {
3271 /* Disable parport if "parport=0" in cmdline */
3272 io[0] = PARPORT_DISABLE;
3276 if (!strncmp(str, "auto", 4)) {
3277 irqval[0] = PARPORT_IRQ_AUTO;
3278 dmaval[0] = PARPORT_DMA_AUTO;
3282 val = simple_strtoul(str, &endptr, 0);
3283 if (endptr == str) {
3284 pr_warn("parport=%s not understood\n", str);
3288 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3289 pr_err("parport=%s ignored, too many ports\n", str);
3293 io[parport_setup_ptr] = val;
3294 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3295 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3297 sep = strchr(str, ',');
3299 if (parport_parse_irq(sep, &val))
3301 irqval[parport_setup_ptr] = val;
3302 sep = strchr(sep, ',');
3304 if (parport_parse_dma(sep, &val))
3306 dmaval[parport_setup_ptr] = val;
3309 parport_setup_ptr++;
3313 static int __init parse_parport_params(void)
3315 return io[0] == PARPORT_DISABLE;
3318 __setup("parport=", parport_setup);
3321 * Acceptable parameters:
3323 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3326 __setup("parport_init_mode=", parport_init_mode_setup);
3330 /* "Parser" ends here */
3332 static int __init parport_pc_init(void)
3336 if (parse_parport_params())
3339 err = platform_driver_register(&parport_pc_platform_driver);
3345 /* Only probe the ports we were given. */
3347 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3350 if (io_hi[i] == PARPORT_IOHI_AUTO)
3351 io_hi[i] = 0x400 + io[i];
3352 parport_pc_probe_port(io[i], io_hi[i],
3353 irqval[i], dmaval[i], NULL, 0);
3356 parport_pc_find_ports(irqval[0], dmaval[0]);
3361 static void __exit parport_pc_exit(void)
3363 if (pci_registered_parport)
3364 pci_unregister_driver(&parport_pc_pci_driver);
3365 if (pnp_registered_parport)
3366 pnp_unregister_driver(&parport_pc_pnp_driver);
3367 platform_driver_unregister(&parport_pc_platform_driver);
3369 while (!list_empty(&ports_list)) {
3370 struct parport_pc_private *priv;
3371 struct parport *port;
3373 priv = list_entry(ports_list.next,
3374 struct parport_pc_private, list);
3377 parport_pc_unregister_port(port);
3378 if (dev && dev->bus == &platform_bus_type)
3379 platform_device_unregister(to_platform_device(dev));
3383 MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3384 MODULE_DESCRIPTION("PC-style parallel port driver");
3385 MODULE_LICENSE("GPL");
3386 module_init(parport_pc_init)
3387 module_exit(parport_pc_exit)