1 /* Low-level parallel-port routines for 8255-based PC-style hardware.
3 * Authors: Phil Blundell <philb@gnu.org>
4 * Tim Waugh <tim@cyberelk.demon.co.uk>
5 * Jose Renau <renau@acm.org>
9 * based on work by Grant Guenther <grant@torque.net> and Phil Blundell.
11 * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
12 * DMA support - Bert De Jonghe <bert@sophis.be>
13 * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999
14 * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G.
15 * Various hacks, Fred Barnes, 04/2001
16 * Updated probing logic - Adam Belay <ambx1@neo.rr.com>
19 /* This driver should work with any hardware that is broadly compatible
20 * with that in the IBM PC. This applies to the majority of integrated
21 * I/O chipsets that are commonly available. The expected register
28 * In addition, there are some optional registers:
32 * base+0x400 ECP config A
33 * base+0x401 ECP config B
34 * base+0x402 ECP control
36 * All registers are 8 bits wide and read/write. If your hardware differs
37 * only in register addresses (eg because your registers are on 32-bit
38 * word boundaries) then you can alter the constants in parport_pc.h to
41 * Note that the ECP registers may not start at offset 0x400 for PCI cards,
42 * but rather will start at port->base_hi.
45 #include <linux/module.h>
46 #include <linux/init.h>
47 #include <linux/sched.h>
48 #include <linux/delay.h>
49 #include <linux/errno.h>
50 #include <linux/interrupt.h>
51 #include <linux/ioport.h>
52 #include <linux/kernel.h>
53 #include <linux/slab.h>
54 #include <linux/dma-mapping.h>
55 #include <linux/pci.h>
56 #include <linux/pnp.h>
57 #include <linux/platform_device.h>
58 #include <linux/sysctl.h>
60 #include <linux/uaccess.h>
64 #include <linux/parport.h>
65 #include <linux/parport_pc.h>
66 #include <linux/via.h>
67 #include <asm/parport.h>
69 #define PARPORT_PC_MAX_PORTS PARPORT_MAX
71 #ifdef CONFIG_ISA_DMA_API
84 #define ECR_MODE_MASK 0xe0
85 #define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v))
90 #define DPRINTK printk
92 #define DPRINTK(stuff...)
97 static struct superio_struct { /* For Super-IO chips autodetection */
101 } superios[NR_SUPERIOS] = { {0,},};
103 static int user_specified;
104 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
105 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
106 static int verbose_probing;
108 static int pci_registered_parport;
109 static int pnp_registered_parport;
111 /* frob_control, but for ECR */
112 static void frob_econtrol(struct parport *pb, unsigned char m,
115 unsigned char ectr = 0;
118 ectr = inb(ECONTROL(pb));
120 DPRINTK(KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n",
121 m, v, ectr, (ectr & ~m) ^ v);
123 outb((ectr & ~m) ^ v, ECONTROL(pb));
126 static inline void frob_set_mode(struct parport *p, int mode)
128 frob_econtrol(p, ECR_MODE_MASK, mode << 5);
131 #ifdef CONFIG_PARPORT_PC_FIFO
132 /* Safely change the mode bits in the ECR
135 -EBUSY: Could not drain FIFO in some finite amount of time,
138 static int change_mode(struct parport *p, int m)
140 const struct parport_pc_private *priv = p->physport->private_data;
144 DPRINTK(KERN_INFO "parport change_mode ECP-ISA to mode 0x%02x\n", m);
147 printk(KERN_DEBUG "change_mode: but there's no ECR!\n");
151 /* Bits <7:5> contain the mode. */
152 oecr = inb(ECONTROL(p));
153 mode = (oecr >> 5) & 0x7;
157 if (mode >= 2 && !(priv->ctr & 0x20)) {
158 /* This mode resets the FIFO, so we may
159 * have to wait for it to drain first. */
160 unsigned long expire = jiffies + p->physport->cad->timeout;
163 case ECR_PPF: /* Parallel Port FIFO mode */
164 case ECR_ECP: /* ECP Parallel Port mode */
165 /* Busy wait for 200us */
166 for (counter = 0; counter < 40; counter++) {
167 if (inb(ECONTROL(p)) & 0x01)
169 if (signal_pending(current))
175 while (!(inb(ECONTROL(p)) & 0x01)) {
176 if (time_after_eq(jiffies, expire))
177 /* The FIFO is stuck. */
179 schedule_timeout_interruptible(
180 msecs_to_jiffies(10));
181 if (signal_pending(current))
187 if (mode >= 2 && m >= 2) {
188 /* We have to go through mode 001 */
190 oecr |= ECR_PS2 << 5;
200 #endif /* FIFO support */
203 * Clear TIMEOUT BIT in EPP MODE
205 * This is also used in SPP detection.
207 static int clear_epp_timeout(struct parport *pb)
211 if (!(parport_pc_read_status(pb) & 0x01))
214 /* To clear timeout some chips require double read */
215 parport_pc_read_status(pb);
216 r = parport_pc_read_status(pb);
217 outb(r | 0x01, STATUS(pb)); /* Some reset by writing 1 */
218 outb(r & 0xfe, STATUS(pb)); /* Others by writing 0 */
219 r = parport_pc_read_status(pb);
227 * Most of these aren't static because they may be used by the
228 * parport_xxx_yyy macros. extern __inline__ versions of several
229 * of these are in parport_pc.h.
232 static void parport_pc_init_state(struct pardevice *dev,
233 struct parport_state *s)
237 dev->port->irq != PARPORT_IRQ_NONE)
241 s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24;
245 static void parport_pc_save_state(struct parport *p, struct parport_state *s)
247 const struct parport_pc_private *priv = p->physport->private_data;
248 s->u.pc.ctr = priv->ctr;
250 s->u.pc.ecr = inb(ECONTROL(p));
253 static void parport_pc_restore_state(struct parport *p,
254 struct parport_state *s)
256 struct parport_pc_private *priv = p->physport->private_data;
257 register unsigned char c = s->u.pc.ctr & priv->ctr_writable;
261 ECR_WRITE(p, s->u.pc.ecr);
264 #ifdef CONFIG_PARPORT_1284
265 static size_t parport_pc_epp_read_data(struct parport *port, void *buf,
266 size_t length, int flags)
270 if (flags & PARPORT_W91284PIC) {
271 unsigned char status;
272 size_t left = length;
274 /* use knowledge about data lines..:
275 * nFault is 0 if there is at least 1 byte in the Warp's FIFO
276 * pError is 1 if there are 16 bytes in the Warp's FIFO
278 status = inb(STATUS(port));
280 while (!(status & 0x08) && got < length) {
281 if (left >= 16 && (status & 0x20) && !(status & 0x08)) {
282 /* can grab 16 bytes from warp fifo */
283 if (!((long)buf & 0x03))
284 insl(EPPDATA(port), buf, 4);
286 insb(EPPDATA(port), buf, 16);
291 /* grab single byte from the warp fifo */
292 *((char *)buf) = inb(EPPDATA(port));
297 status = inb(STATUS(port));
299 /* EPP timeout should never occur... */
301 "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n", port->name);
302 clear_epp_timeout(port);
307 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
308 if (!(((long)buf | length) & 0x03))
309 insl(EPPDATA(port), buf, (length >> 2));
311 insb(EPPDATA(port), buf, length);
312 if (inb(STATUS(port)) & 0x01) {
313 clear_epp_timeout(port);
318 for (; got < length; got++) {
319 *((char *)buf) = inb(EPPDATA(port));
321 if (inb(STATUS(port)) & 0x01) {
323 clear_epp_timeout(port);
331 static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
332 size_t length, int flags)
336 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
337 if (!(((long)buf | length) & 0x03))
338 outsl(EPPDATA(port), buf, (length >> 2));
340 outsb(EPPDATA(port), buf, length);
341 if (inb(STATUS(port)) & 0x01) {
342 clear_epp_timeout(port);
347 for (; written < length; written++) {
348 outb(*((char *)buf), EPPDATA(port));
350 if (inb(STATUS(port)) & 0x01) {
351 clear_epp_timeout(port);
359 static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
360 size_t length, int flags)
364 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
365 insb(EPPADDR(port), buf, length);
366 if (inb(STATUS(port)) & 0x01) {
367 clear_epp_timeout(port);
372 for (; got < length; got++) {
373 *((char *)buf) = inb(EPPADDR(port));
375 if (inb(STATUS(port)) & 0x01) {
376 clear_epp_timeout(port);
384 static size_t parport_pc_epp_write_addr(struct parport *port,
385 const void *buf, size_t length,
390 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
391 outsb(EPPADDR(port), buf, length);
392 if (inb(STATUS(port)) & 0x01) {
393 clear_epp_timeout(port);
398 for (; written < length; written++) {
399 outb(*((char *)buf), EPPADDR(port));
401 if (inb(STATUS(port)) & 0x01) {
402 clear_epp_timeout(port);
410 static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
411 size_t length, int flags)
415 frob_set_mode(port, ECR_EPP);
416 parport_pc_data_reverse(port);
417 parport_pc_write_control(port, 0x4);
418 got = parport_pc_epp_read_data(port, buf, length, flags);
419 frob_set_mode(port, ECR_PS2);
424 static size_t parport_pc_ecpepp_write_data(struct parport *port,
425 const void *buf, size_t length,
430 frob_set_mode(port, ECR_EPP);
431 parport_pc_write_control(port, 0x4);
432 parport_pc_data_forward(port);
433 written = parport_pc_epp_write_data(port, buf, length, flags);
434 frob_set_mode(port, ECR_PS2);
439 static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
440 size_t length, int flags)
444 frob_set_mode(port, ECR_EPP);
445 parport_pc_data_reverse(port);
446 parport_pc_write_control(port, 0x4);
447 got = parport_pc_epp_read_addr(port, buf, length, flags);
448 frob_set_mode(port, ECR_PS2);
453 static size_t parport_pc_ecpepp_write_addr(struct parport *port,
454 const void *buf, size_t length,
459 frob_set_mode(port, ECR_EPP);
460 parport_pc_write_control(port, 0x4);
461 parport_pc_data_forward(port);
462 written = parport_pc_epp_write_addr(port, buf, length, flags);
463 frob_set_mode(port, ECR_PS2);
467 #endif /* IEEE 1284 support */
469 #ifdef CONFIG_PARPORT_PC_FIFO
470 static size_t parport_pc_fifo_write_block_pio(struct parport *port,
471 const void *buf, size_t length)
474 const unsigned char *bufp = buf;
475 size_t left = length;
476 unsigned long expire = jiffies + port->physport->cad->timeout;
477 const int fifo = FIFO(port);
478 int poll_for = 8; /* 80 usecs */
479 const struct parport_pc_private *priv = port->physport->private_data;
480 const int fifo_depth = priv->fifo_depth;
482 port = port->physport;
484 /* We don't want to be interrupted every character. */
485 parport_pc_disable_irq(port);
486 /* set nErrIntrEn and serviceIntr */
487 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
490 parport_pc_data_forward(port); /* Must be in PS2 mode */
494 unsigned char ecrval = inb(ECONTROL(port));
497 if (need_resched() && time_before(jiffies, expire))
498 /* Can't yield the port. */
501 /* Anyone else waiting for the port? */
502 if (port->waithead) {
503 printk(KERN_DEBUG "Somebody wants the port\n");
508 /* FIFO is full. Wait for interrupt. */
510 /* Clear serviceIntr */
511 ECR_WRITE(port, ecrval & ~(1<<2));
513 ret = parport_wait_event(port, HZ);
517 if (!time_before(jiffies, expire)) {
519 printk(KERN_DEBUG "FIFO write timed out\n");
522 ecrval = inb(ECONTROL(port));
523 if (!(ecrval & (1<<2))) {
524 if (need_resched() &&
525 time_before(jiffies, expire))
534 /* Can't fail now. */
535 expire = jiffies + port->cad->timeout;
538 if (signal_pending(current))
542 /* FIFO is empty. Blast it full. */
543 const int n = left < fifo_depth ? left : fifo_depth;
544 outsb(fifo, bufp, n);
548 /* Adjust the poll time. */
549 if (i < (poll_for - 2))
552 } else if (i++ < poll_for) {
554 ecrval = inb(ECONTROL(port));
558 /* Half-full(call me an optimist) */
563 dump_parport_state("leave fifo_write_block_pio", port);
564 return length - left;
568 static size_t parport_pc_fifo_write_block_dma(struct parport *port,
569 const void *buf, size_t length)
572 unsigned long dmaflag;
573 size_t left = length;
574 const struct parport_pc_private *priv = port->physport->private_data;
575 struct device *dev = port->physport->dev;
576 dma_addr_t dma_addr, dma_handle;
577 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
578 unsigned long start = (unsigned long) buf;
579 unsigned long end = (unsigned long) buf + length - 1;
581 dump_parport_state("enter fifo_write_block_dma", port);
582 if (end < MAX_DMA_ADDRESS) {
583 /* If it would cross a 64k boundary, cap it at the end. */
584 if ((start ^ end) & ~0xffffUL)
585 maxlen = 0x10000 - (start & 0xffff);
587 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
590 /* above 16 MB we use a bounce buffer as ISA-DMA
592 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
593 dma_addr = priv->dma_handle;
597 port = port->physport;
599 /* We don't want to be interrupted every character. */
600 parport_pc_disable_irq(port);
601 /* set nErrIntrEn and serviceIntr */
602 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
605 parport_pc_data_forward(port); /* Must be in PS2 mode */
608 unsigned long expire = jiffies + port->physport->cad->timeout;
615 if (!dma_handle) /* bounce buffer ! */
616 memcpy(priv->dma_buf, buf, count);
618 dmaflag = claim_dma_lock();
619 disable_dma(port->dma);
620 clear_dma_ff(port->dma);
621 set_dma_mode(port->dma, DMA_MODE_WRITE);
622 set_dma_addr(port->dma, dma_addr);
623 set_dma_count(port->dma, count);
626 frob_econtrol(port, 1<<3, 1<<3);
628 /* Clear serviceIntr */
629 frob_econtrol(port, 1<<2, 0);
631 enable_dma(port->dma);
632 release_dma_lock(dmaflag);
634 /* assume DMA will be successful */
640 /* Wait for interrupt. */
642 ret = parport_wait_event(port, HZ);
646 if (!time_before(jiffies, expire)) {
648 printk(KERN_DEBUG "DMA write timed out\n");
651 /* Is serviceIntr set? */
652 if (!(inb(ECONTROL(port)) & (1<<2))) {
658 dmaflag = claim_dma_lock();
659 disable_dma(port->dma);
660 clear_dma_ff(port->dma);
661 count = get_dma_residue(port->dma);
662 release_dma_lock(dmaflag);
664 cond_resched(); /* Can't yield the port. */
666 /* Anyone else waiting for the port? */
667 if (port->waithead) {
668 printk(KERN_DEBUG "Somebody wants the port\n");
672 /* update for possible DMA residue ! */
679 /* Maybe got here through break, so adjust for DMA residue! */
680 dmaflag = claim_dma_lock();
681 disable_dma(port->dma);
682 clear_dma_ff(port->dma);
683 left += get_dma_residue(port->dma);
684 release_dma_lock(dmaflag);
686 /* Turn off DMA mode */
687 frob_econtrol(port, 1<<3, 0);
690 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
692 dump_parport_state("leave fifo_write_block_dma", port);
693 return length - left;
697 static inline size_t parport_pc_fifo_write_block(struct parport *port,
698 const void *buf, size_t length)
701 if (port->dma != PARPORT_DMA_NONE)
702 return parport_pc_fifo_write_block_dma(port, buf, length);
704 return parport_pc_fifo_write_block_pio(port, buf, length);
707 /* Parallel Port FIFO mode (ECP chipsets) */
708 static size_t parport_pc_compat_write_block_pio(struct parport *port,
709 const void *buf, size_t length,
714 unsigned long expire;
715 const struct parport_pc_private *priv = port->physport->private_data;
717 /* Special case: a timeout of zero means we cannot call schedule().
718 * Also if O_NONBLOCK is set then use the default implementation. */
719 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
720 return parport_ieee1284_write_compat(port, buf,
723 /* Set up parallel port FIFO mode.*/
724 parport_pc_data_forward(port); /* Must be in PS2 mode */
725 parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0);
726 r = change_mode(port, ECR_PPF); /* Parallel port FIFO */
728 printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
731 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
733 /* Write the data to the FIFO. */
734 written = parport_pc_fifo_write_block(port, buf, length);
737 /* For some hardware we don't want to touch the mode until
738 * the FIFO is empty, so allow 4 seconds for each position
741 expire = jiffies + (priv->fifo_depth * HZ * 4);
743 /* Wait for the FIFO to empty */
744 r = change_mode(port, ECR_PS2);
747 } while (time_before(jiffies, expire));
750 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
752 /* Prevent further data transfer. */
753 frob_set_mode(port, ECR_TST);
755 /* Adjust for the contents of the FIFO. */
756 for (written -= priv->fifo_depth; ; written++) {
757 if (inb(ECONTROL(port)) & 0x2) {
764 /* Reset the FIFO and return to PS2 mode. */
765 frob_set_mode(port, ECR_PS2);
768 r = parport_wait_peripheral(port,
770 PARPORT_STATUS_BUSY);
773 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
776 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
782 #ifdef CONFIG_PARPORT_1284
783 static size_t parport_pc_ecp_write_block_pio(struct parport *port,
784 const void *buf, size_t length,
789 unsigned long expire;
790 const struct parport_pc_private *priv = port->physport->private_data;
792 /* Special case: a timeout of zero means we cannot call schedule().
793 * Also if O_NONBLOCK is set then use the default implementation. */
794 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
795 return parport_ieee1284_ecp_write_data(port, buf,
798 /* Switch to forward mode if necessary. */
799 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
800 /* Event 47: Set nInit high. */
801 parport_frob_control(port,
803 | PARPORT_CONTROL_AUTOFD,
805 | PARPORT_CONTROL_AUTOFD);
807 /* Event 49: PError goes high. */
808 r = parport_wait_peripheral(port,
809 PARPORT_STATUS_PAPEROUT,
810 PARPORT_STATUS_PAPEROUT);
812 printk(KERN_DEBUG "%s: PError timeout (%d) "
813 "in ecp_write_block_pio\n", port->name, r);
817 /* Set up ECP parallel port mode.*/
818 parport_pc_data_forward(port); /* Must be in PS2 mode */
819 parport_pc_frob_control(port,
820 PARPORT_CONTROL_STROBE |
821 PARPORT_CONTROL_AUTOFD,
823 r = change_mode(port, ECR_ECP); /* ECP FIFO */
825 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
827 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
829 /* Write the data to the FIFO. */
830 written = parport_pc_fifo_write_block(port, buf, length);
833 /* For some hardware we don't want to touch the mode until
834 * the FIFO is empty, so allow 4 seconds for each position
837 expire = jiffies + (priv->fifo_depth * (HZ * 4));
839 /* Wait for the FIFO to empty */
840 r = change_mode(port, ECR_PS2);
843 } while (time_before(jiffies, expire));
846 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
848 /* Prevent further data transfer. */
849 frob_set_mode(port, ECR_TST);
851 /* Adjust for the contents of the FIFO. */
852 for (written -= priv->fifo_depth; ; written++) {
853 if (inb(ECONTROL(port)) & 0x2) {
860 /* Reset the FIFO and return to PS2 mode. */
861 frob_set_mode(port, ECR_PS2);
863 /* Host transfer recovery. */
864 parport_pc_data_reverse(port); /* Must be in PS2 mode */
866 parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
867 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
869 printk(KERN_DEBUG "%s: PE,1 timeout (%d) "
870 "in ecp_write_block_pio\n", port->name, r);
872 parport_frob_control(port,
873 PARPORT_CONTROL_INIT,
874 PARPORT_CONTROL_INIT);
875 r = parport_wait_peripheral(port,
876 PARPORT_STATUS_PAPEROUT,
877 PARPORT_STATUS_PAPEROUT);
879 printk(KERN_DEBUG "%s: PE,2 timeout (%d) "
880 "in ecp_write_block_pio\n", port->name, r);
883 r = parport_wait_peripheral(port,
885 PARPORT_STATUS_BUSY);
888 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
891 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
895 #endif /* IEEE 1284 support */
896 #endif /* Allowed to use FIFO/DMA */
900 * ******************************************
901 * INITIALISATION AND MODULE STUFF BELOW HERE
902 * ******************************************
905 /* GCC is not inlining extern inline function later overwriten to non-inline,
906 so we use outlined_ variants here. */
907 static const struct parport_operations parport_pc_ops = {
908 .write_data = parport_pc_write_data,
909 .read_data = parport_pc_read_data,
911 .write_control = parport_pc_write_control,
912 .read_control = parport_pc_read_control,
913 .frob_control = parport_pc_frob_control,
915 .read_status = parport_pc_read_status,
917 .enable_irq = parport_pc_enable_irq,
918 .disable_irq = parport_pc_disable_irq,
920 .data_forward = parport_pc_data_forward,
921 .data_reverse = parport_pc_data_reverse,
923 .init_state = parport_pc_init_state,
924 .save_state = parport_pc_save_state,
925 .restore_state = parport_pc_restore_state,
927 .epp_write_data = parport_ieee1284_epp_write_data,
928 .epp_read_data = parport_ieee1284_epp_read_data,
929 .epp_write_addr = parport_ieee1284_epp_write_addr,
930 .epp_read_addr = parport_ieee1284_epp_read_addr,
932 .ecp_write_data = parport_ieee1284_ecp_write_data,
933 .ecp_read_data = parport_ieee1284_ecp_read_data,
934 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
936 .compat_write_data = parport_ieee1284_write_compat,
937 .nibble_read_data = parport_ieee1284_read_nibble,
938 .byte_read_data = parport_ieee1284_read_byte,
940 .owner = THIS_MODULE,
943 #ifdef CONFIG_PARPORT_PC_SUPERIO
945 static struct superio_struct *find_free_superio(void)
948 for (i = 0; i < NR_SUPERIOS; i++)
949 if (superios[i].io == 0)
955 /* Super-IO chipset detection, Winbond, SMSC */
956 static void show_parconfig_smsc37c669(int io, int key)
958 int cr1, cr4, cra, cr23, cr26, cr27;
959 struct superio_struct *s;
961 static const char *const modes[] = {
962 "SPP and Bidirectional (PS/2)",
983 if (verbose_probing) {
985 "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
986 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
987 cr1, cr4, cra, cr23, cr26, cr27);
989 /* The documentation calls DMA and IRQ-Lines by letters, so
990 the board maker can/will wire them
991 appropriately/randomly... G=reserved H=IDE-irq, */
993 "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n",
995 (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
996 (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-',
998 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
999 (cr23 * 4 >= 0x100) ? "yes" : "no",
1000 (cr1 & 4) ? "yes" : "no");
1002 "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1003 (cr1 & 0x08) ? "Standard mode only (SPP)"
1004 : modes[cr4 & 0x03],
1005 (cr4 & 0x40) ? "1.7" : "1.9");
1008 /* Heuristics ! BIOS setup for this mainboard device limits
1009 the choices to standard settings, i.e. io-address and IRQ
1010 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1011 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1012 if (cr23 * 4 >= 0x100) { /* if active */
1013 s = find_free_superio();
1015 printk(KERN_INFO "Super-IO: too many chips!\n");
1032 if (d == 1 || d == 3)
1035 s->dma = PARPORT_DMA_NONE;
1041 static void show_parconfig_winbond(int io, int key)
1043 int cr30, cr60, cr61, cr70, cr74, crf0;
1044 struct superio_struct *s;
1045 static const char *const modes[] = {
1046 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1051 "EPP-1.7 and SPP", /* 5 */
1053 "ECP and EPP-1.7" };
1054 static char *const irqtypes[] = {
1055 "pulsed low, high-Z",
1058 /* The registers are called compatible-PnP because the
1059 register layout is modelled after ISA-PnP, the access
1060 method is just another ... */
1063 outb(0x07, io); /* Register 7: Select Logical Device */
1064 outb(0x01, io + 1); /* LD1 is Parallel Port */
1079 if (verbose_probing) {
1081 "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n",
1082 cr30, cr60, cr61, cr70, cr74, crf0);
1083 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1084 (cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f);
1085 if ((cr74 & 0x07) > 3)
1086 printk("dma=none\n");
1088 printk("dma=%d\n", cr74 & 0x07);
1090 "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1091 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1092 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n",
1093 modes[crf0 & 0x07]);
1096 if (cr30 & 0x01) { /* the settings can be interrogated later ... */
1097 s = find_free_superio();
1099 printk(KERN_INFO "Super-IO: too many chips!\n");
1101 s->io = (cr60 << 8) | cr61;
1102 s->irq = cr70 & 0x0f;
1103 s->dma = (((cr74 & 0x07) > 3) ?
1104 PARPORT_DMA_NONE : (cr74 & 0x07));
1109 static void decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1111 const char *type = "unknown";
1114 if (devid == devrev)
1115 /* simple heuristics, we happened to read some
1116 non-winbond register */
1119 id = (devid << 8) | devrev;
1121 /* Values are from public data sheets pdf files, I can just
1122 confirm 83977TF is correct :-) */
1125 else if (id == 0x9773)
1126 type = "83977TF / SMSC 97w33x/97w34x";
1127 else if (id == 0x9774)
1129 else if ((id & ~0x0f) == 0x5270)
1130 type = "83977CTF / SMSC 97w36x";
1131 else if ((id & ~0x0f) == 0x52f0)
1132 type = "83977EF / SMSC 97w35x";
1133 else if ((id & ~0x0f) == 0x5210)
1135 else if ((id & ~0x0f) == 0x6010)
1137 else if ((oldid & 0x0f) == 0x0a) {
1140 } else if ((oldid & 0x0f) == 0x0b) {
1143 } else if ((oldid & 0x0f) == 0x0c) {
1146 } else if ((oldid & 0x0f) == 0x0d) {
1152 if (verbose_probing)
1153 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1154 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1155 efer, key, devid, devrev, oldid, type);
1158 show_parconfig_winbond(efer, key);
1161 static void decode_smsc(int efer, int key, int devid, int devrev)
1163 const char *type = "unknown";
1164 void (*func)(int io, int key);
1167 if (devid == devrev)
1168 /* simple heuristics, we happened to read some
1169 non-smsc register */
1173 id = (devid << 8) | devrev;
1177 func = show_parconfig_smsc37c669;
1178 } else if (id == 0x6582)
1180 else if (devid == 0x65)
1182 else if (devid == 0x66)
1185 if (verbose_probing)
1186 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1187 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1188 efer, key, devid, devrev, type);
1195 static void winbond_check(int io, int key)
1197 int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1199 if (!request_region(io, 3, __func__))
1202 origval = inb(io); /* Save original value */
1204 /* First probe without key */
1206 x_devid = inb(io + 1);
1208 x_devrev = inb(io + 1);
1210 x_oldid = inb(io + 1);
1213 outb(key, io); /* Write Magic Sequence to EFER, extended
1214 function enable register */
1215 outb(0x20, io); /* Write EFIR, extended function index register */
1216 devid = inb(io + 1); /* Read EFDR, extended function data register */
1218 devrev = inb(io + 1);
1220 oldid = inb(io + 1);
1221 outb(0xaa, io); /* Magic Seal */
1223 outb(origval, io); /* in case we poked some entirely different hardware */
1225 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1226 goto out; /* protection against false positives */
1228 decode_winbond(io, key, devid, devrev, oldid);
1230 release_region(io, 3);
1233 static void winbond_check2(int io, int key)
1235 int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1237 if (!request_region(io, 3, __func__))
1240 origval[0] = inb(io); /* Save original values */
1241 origval[1] = inb(io + 1);
1242 origval[2] = inb(io + 2);
1244 /* First probe without the key */
1246 x_devid = inb(io + 2);
1248 x_devrev = inb(io + 2);
1250 x_oldid = inb(io + 2);
1252 outb(key, io); /* Write Magic Byte to EFER, extended
1253 function enable register */
1254 outb(0x20, io + 2); /* Write EFIR, extended function index register */
1255 devid = inb(io + 2); /* Read EFDR, extended function data register */
1257 devrev = inb(io + 2);
1259 oldid = inb(io + 2);
1260 outb(0xaa, io); /* Magic Seal */
1262 outb(origval[0], io); /* in case we poked some entirely different hardware */
1263 outb(origval[1], io + 1);
1264 outb(origval[2], io + 2);
1266 if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
1267 goto out; /* protection against false positives */
1269 decode_winbond(io, key, devid, devrev, oldid);
1271 release_region(io, 3);
1274 static void smsc_check(int io, int key)
1276 int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
1278 if (!request_region(io, 3, __func__))
1281 origval = inb(io); /* Save original value */
1283 /* First probe without the key */
1285 x_oldid = inb(io + 1);
1287 x_oldrev = inb(io + 1);
1291 x_rev = inb(io + 1);
1294 outb(key, io); /* Write Magic Sequence to EFER, extended
1295 function enable register */
1296 outb(0x0d, io); /* Write EFIR, extended function index register */
1297 oldid = inb(io + 1); /* Read EFDR, extended function data register */
1299 oldrev = inb(io + 1);
1304 outb(0xaa, io); /* Magic Seal */
1306 outb(origval, io); /* in case we poked some entirely different hardware */
1308 if (x_id == id && x_oldrev == oldrev &&
1309 x_oldid == oldid && x_rev == rev)
1310 goto out; /* protection against false positives */
1312 decode_smsc(io, key, oldid, oldrev);
1314 release_region(io, 3);
1318 static void detect_and_report_winbond(void)
1320 if (verbose_probing)
1321 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1322 winbond_check(0x3f0, 0x87);
1323 winbond_check(0x370, 0x87);
1324 winbond_check(0x2e , 0x87);
1325 winbond_check(0x4e , 0x87);
1326 winbond_check(0x3f0, 0x86);
1327 winbond_check2(0x250, 0x88);
1328 winbond_check2(0x250, 0x89);
1331 static void detect_and_report_smsc(void)
1333 if (verbose_probing)
1334 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1335 smsc_check(0x3f0, 0x55);
1336 smsc_check(0x370, 0x55);
1337 smsc_check(0x3f0, 0x44);
1338 smsc_check(0x370, 0x44);
1341 static void detect_and_report_it87(void)
1345 if (verbose_probing)
1346 printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
1347 if (!request_muxed_region(0x2e, 2, __func__))
1349 origval = inb(0x2e); /* Save original value */
1355 dev = inb(0x2f) << 8;
1358 if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 ||
1359 dev == 0x8716 || dev == 0x8718 || dev == 0x8726) {
1360 printk(KERN_INFO "IT%04X SuperIO detected.\n", dev);
1361 outb(0x07, 0x2E); /* Parallel Port */
1363 outb(0xF0, 0x2E); /* BOOT 0x80 off */
1367 outb(0x02, 0x2E); /* Lock */
1370 outb(origval, 0x2e); /* Oops, sorry to disturb */
1372 release_region(0x2e, 2);
1374 #endif /* CONFIG_PARPORT_PC_SUPERIO */
1376 static struct superio_struct *find_superio(struct parport *p)
1379 for (i = 0; i < NR_SUPERIOS; i++)
1380 if (superios[i].io != p->base)
1381 return &superios[i];
1385 static int get_superio_dma(struct parport *p)
1387 struct superio_struct *s = find_superio(p);
1390 return PARPORT_DMA_NONE;
1393 static int get_superio_irq(struct parport *p)
1395 struct superio_struct *s = find_superio(p);
1398 return PARPORT_IRQ_NONE;
1402 /* --- Mode detection ------------------------------------- */
1405 * Checks for port existence, all ports support SPP MODE
1407 * 0 : No parallel port at this address
1408 * PARPORT_MODE_PCSPP : SPP port detected
1409 * (if the user specified an ioport himself,
1410 * this shall always be the case!)
1413 static int parport_SPP_supported(struct parport *pb)
1418 * first clear an eventually pending EPP timeout
1419 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1420 * that does not even respond to SPP cycles if an EPP
1421 * timeout is pending
1423 clear_epp_timeout(pb);
1425 /* Do a simple read-write test to make sure the port exists. */
1427 outb(w, CONTROL(pb));
1429 /* Is there a control register that we can read from? Some
1430 * ports don't allow reads, so read_control just returns a
1431 * software copy. Some ports _do_ allow reads, so bypass the
1432 * software copy here. In addition, some bits aren't
1434 r = inb(CONTROL(pb));
1435 if ((r & 0xf) == w) {
1437 outb(w, CONTROL(pb));
1438 r = inb(CONTROL(pb));
1439 outb(0xc, CONTROL(pb));
1441 return PARPORT_MODE_PCSPP;
1445 /* That didn't work, but the user thinks there's a
1447 printk(KERN_INFO "parport 0x%lx (WARNING): CTR: "
1448 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1450 /* Try the data register. The data lines aren't tri-stated at
1451 * this stage, so we expect back what we wrote. */
1453 parport_pc_write_data(pb, w);
1454 r = parport_pc_read_data(pb);
1457 parport_pc_write_data(pb, w);
1458 r = parport_pc_read_data(pb);
1460 return PARPORT_MODE_PCSPP;
1463 if (user_specified) {
1464 /* Didn't work, but the user is convinced this is the
1466 printk(KERN_INFO "parport 0x%lx (WARNING): DATA: "
1467 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1468 printk(KERN_INFO "parport 0x%lx: You gave this address, "
1469 "but there is probably no parallel port there!\n",
1473 /* It's possible that we can't read the control register or
1474 * the data register. In that case just believe the user. */
1476 return PARPORT_MODE_PCSPP;
1483 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1484 * on these cards actually accesses the CTR.
1486 * Modern cards don't do this but reading from ECR will return 0xff
1487 * regardless of what is written here if the card does NOT support
1490 * We first check to see if ECR is the same as CTR. If not, the low
1491 * two bits of ECR aren't writable, so we check by writing ECR and
1492 * reading it back to see if it's what we expect.
1494 static int parport_ECR_present(struct parport *pb)
1496 struct parport_pc_private *priv = pb->private_data;
1497 unsigned char r = 0xc;
1499 outb(r, CONTROL(pb));
1500 if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) {
1501 outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */
1503 r = inb(CONTROL(pb));
1504 if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
1505 goto no_reg; /* Sure that no ECR register exists */
1508 if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
1511 ECR_WRITE(pb, 0x34);
1512 if (inb(ECONTROL(pb)) != 0x35)
1516 outb(0xc, CONTROL(pb));
1518 /* Go to mode 000 */
1519 frob_set_mode(pb, ECR_SPP);
1524 outb(0xc, CONTROL(pb));
1528 #ifdef CONFIG_PARPORT_1284
1529 /* Detect PS/2 support.
1531 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1532 * allows us to read data from the data lines. In theory we would get back
1533 * 0xff but any peripheral attached to the port may drag some or all of the
1534 * lines down to zero. So if we get back anything that isn't the contents
1535 * of the data register we deem PS/2 support to be present.
1537 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1538 * drivers, but an external peripheral with sufficiently beefy drivers of
1539 * its own can overpower them and assert its own levels onto the bus, from
1540 * where they can then be read back as normal. Ports with this property
1541 * and the right type of device attached are likely to fail the SPP test,
1542 * (as they will appear to have stuck bits) and so the fact that they might
1543 * be misdetected here is rather academic.
1546 static int parport_PS2_supported(struct parport *pb)
1550 clear_epp_timeout(pb);
1552 /* try to tri-state the buffer */
1553 parport_pc_data_reverse(pb);
1555 parport_pc_write_data(pb, 0x55);
1556 if (parport_pc_read_data(pb) != 0x55)
1559 parport_pc_write_data(pb, 0xaa);
1560 if (parport_pc_read_data(pb) != 0xaa)
1563 /* cancel input mode */
1564 parport_pc_data_forward(pb);
1567 pb->modes |= PARPORT_MODE_TRISTATE;
1569 struct parport_pc_private *priv = pb->private_data;
1570 priv->ctr_writable &= ~0x20;
1576 #ifdef CONFIG_PARPORT_PC_FIFO
1577 static int parport_ECP_supported(struct parport *pb)
1580 int config, configb;
1582 struct parport_pc_private *priv = pb->private_data;
1583 /* Translate ECP intrLine to ISA irq value */
1584 static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 };
1586 /* If there is no ECR, we have no hope of supporting ECP. */
1590 /* Find out FIFO depth */
1591 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1592 ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */
1593 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++)
1594 outb(0xaa, FIFO(pb));
1597 * Using LGS chipset it uses ECR register, but
1598 * it doesn't support ECP or FIFO MODE
1601 ECR_WRITE(pb, ECR_SPP << 5);
1605 priv->fifo_depth = i;
1606 if (verbose_probing)
1607 printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1609 /* Find out writeIntrThreshold */
1610 frob_econtrol(pb, 1<<2, 1<<2);
1611 frob_econtrol(pb, 1<<2, 0);
1612 for (i = 1; i <= priv->fifo_depth; i++) {
1615 if (inb(ECONTROL(pb)) & (1<<2))
1619 if (i <= priv->fifo_depth) {
1620 if (verbose_probing)
1621 printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1624 /* Number of bytes we know we can write if we get an
1628 priv->writeIntrThreshold = i;
1630 /* Find out readIntrThreshold */
1631 frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1632 parport_pc_data_reverse(pb); /* Must be in PS2 mode */
1633 frob_set_mode(pb, ECR_TST); /* Test FIFO */
1634 frob_econtrol(pb, 1<<2, 1<<2);
1635 frob_econtrol(pb, 1<<2, 0);
1636 for (i = 1; i <= priv->fifo_depth; i++) {
1637 outb(0xaa, FIFO(pb));
1638 if (inb(ECONTROL(pb)) & (1<<2))
1642 if (i <= priv->fifo_depth) {
1643 if (verbose_probing)
1644 printk(KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1647 /* Number of bytes we can read if we get an interrupt. */
1650 priv->readIntrThreshold = i;
1652 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1653 ECR_WRITE(pb, 0xf4); /* Configuration mode */
1654 config = inb(CONFIGA(pb));
1655 pword = (config >> 4) & 0x7;
1659 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1664 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1668 printk(KERN_WARNING "0x%lx: Unknown implementation ID\n",
1674 priv->pword = pword;
1676 if (verbose_probing) {
1677 printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
1678 pb->base, 8 * pword);
1680 printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1681 config & 0x80 ? "Level" : "Pulses");
1683 configb = inb(CONFIGB(pb));
1684 printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1685 pb->base, config, configb);
1686 printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1687 if ((configb >> 3) & 0x07)
1688 printk("%d", intrline[(configb >> 3) & 0x07]);
1690 printk("<none or set by other means>");
1692 if ((configb & 0x03) == 0x00)
1693 printk("<none or set by other means>\n");
1695 printk("%d\n", configb & 0x07);
1698 /* Go back to mode 000 */
1699 frob_set_mode(pb, ECR_SPP);
1705 static int parport_ECPPS2_supported(struct parport *pb)
1707 const struct parport_pc_private *priv = pb->private_data;
1714 oecr = inb(ECONTROL(pb));
1715 ECR_WRITE(pb, ECR_PS2 << 5);
1716 result = parport_PS2_supported(pb);
1717 ECR_WRITE(pb, oecr);
1721 /* EPP mode detection */
1723 static int parport_EPP_supported(struct parport *pb)
1725 const struct parport_pc_private *priv = pb->private_data;
1729 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1730 * when EPP is possible and is set high when an EPP timeout
1731 * occurs (EPP uses the HALT line to stop the CPU while it does
1732 * the byte transfer, an EPP timeout occurs if the attached
1733 * device fails to respond after 10 micro seconds).
1735 * This bit is cleared by either reading it (National Semi)
1736 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1737 * This bit is always high in non EPP modes.
1740 /* If EPP timeout bit clear then EPP available */
1741 if (!clear_epp_timeout(pb))
1742 return 0; /* No way to clear timeout */
1744 /* Check for Intel bug. */
1747 for (i = 0x00; i < 0x80; i += 0x20) {
1749 if (clear_epp_timeout(pb)) {
1750 /* Phony EPP in ECP. */
1756 pb->modes |= PARPORT_MODE_EPP;
1758 /* Set up access functions to use EPP hardware. */
1759 pb->ops->epp_read_data = parport_pc_epp_read_data;
1760 pb->ops->epp_write_data = parport_pc_epp_write_data;
1761 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1762 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1767 static int parport_ECPEPP_supported(struct parport *pb)
1769 struct parport_pc_private *priv = pb->private_data;
1776 oecr = inb(ECONTROL(pb));
1777 /* Search for SMC style EPP+ECP mode */
1778 ECR_WRITE(pb, 0x80);
1779 outb(0x04, CONTROL(pb));
1780 result = parport_EPP_supported(pb);
1782 ECR_WRITE(pb, oecr);
1785 /* Set up access functions to use ECP+EPP hardware. */
1786 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1787 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1788 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1789 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1795 #else /* No IEEE 1284 support */
1797 /* Don't bother probing for modes we know we won't use. */
1798 static int parport_PS2_supported(struct parport *pb) { return 0; }
1799 #ifdef CONFIG_PARPORT_PC_FIFO
1800 static int parport_ECP_supported(struct parport *pb)
1805 static int parport_EPP_supported(struct parport *pb)
1810 static int parport_ECPEPP_supported(struct parport *pb)
1815 static int parport_ECPPS2_supported(struct parport *pb)
1820 #endif /* No IEEE 1284 support */
1822 /* --- IRQ detection -------------------------------------- */
1824 /* Only if supports ECP mode */
1825 static int programmable_irq_support(struct parport *pb)
1828 unsigned char oecr = inb(ECONTROL(pb));
1829 static const int lookup[8] = {
1830 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1833 ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
1835 intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
1836 irq = lookup[intrLine];
1838 ECR_WRITE(pb, oecr);
1842 static int irq_probe_ECP(struct parport *pb)
1847 irqs = probe_irq_on();
1849 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1850 ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
1851 ECR_WRITE(pb, ECR_TST << 5);
1853 /* If Full FIFO sure that writeIntrThreshold is generated */
1854 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++)
1855 outb(0xaa, FIFO(pb));
1857 pb->irq = probe_irq_off(irqs);
1858 ECR_WRITE(pb, ECR_SPP << 5);
1861 pb->irq = PARPORT_IRQ_NONE;
1867 * This detection seems that only works in National Semiconductors
1868 * This doesn't work in SMC, LGS, and Winbond
1870 static int irq_probe_EPP(struct parport *pb)
1872 #ifndef ADVANCED_DETECT
1873 return PARPORT_IRQ_NONE;
1878 if (pb->modes & PARPORT_MODE_PCECR)
1879 oecr = inb(ECONTROL(pb));
1881 irqs = probe_irq_on();
1883 if (pb->modes & PARPORT_MODE_PCECR)
1884 frob_econtrol(pb, 0x10, 0x10);
1886 clear_epp_timeout(pb);
1887 parport_pc_frob_control(pb, 0x20, 0x20);
1888 parport_pc_frob_control(pb, 0x10, 0x10);
1889 clear_epp_timeout(pb);
1891 /* Device isn't expecting an EPP read
1892 * and generates an IRQ.
1894 parport_pc_read_epp(pb);
1897 pb->irq = probe_irq_off(irqs);
1898 if (pb->modes & PARPORT_MODE_PCECR)
1899 ECR_WRITE(pb, oecr);
1900 parport_pc_write_control(pb, 0xc);
1903 pb->irq = PARPORT_IRQ_NONE;
1906 #endif /* Advanced detection */
1909 static int irq_probe_SPP(struct parport *pb)
1911 /* Don't even try to do this. */
1912 return PARPORT_IRQ_NONE;
1915 /* We will attempt to share interrupt requests since other devices
1916 * such as sound cards and network cards seem to like using the
1919 * When ECP is available we can autoprobe for IRQs.
1920 * NOTE: If we can autoprobe it, we can register the IRQ.
1922 static int parport_irq_probe(struct parport *pb)
1924 struct parport_pc_private *priv = pb->private_data;
1927 pb->irq = programmable_irq_support(pb);
1929 if (pb->irq == PARPORT_IRQ_NONE)
1930 pb->irq = irq_probe_ECP(pb);
1933 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
1934 (pb->modes & PARPORT_MODE_EPP))
1935 pb->irq = irq_probe_EPP(pb);
1937 clear_epp_timeout(pb);
1939 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
1940 pb->irq = irq_probe_EPP(pb);
1942 clear_epp_timeout(pb);
1944 if (pb->irq == PARPORT_IRQ_NONE)
1945 pb->irq = irq_probe_SPP(pb);
1947 if (pb->irq == PARPORT_IRQ_NONE)
1948 pb->irq = get_superio_irq(pb);
1953 /* --- DMA detection -------------------------------------- */
1955 /* Only if chipset conforms to ECP ISA Interface Standard */
1956 static int programmable_dma_support(struct parport *p)
1958 unsigned char oecr = inb(ECONTROL(p));
1961 frob_set_mode(p, ECR_CNF);
1963 dma = inb(CONFIGB(p)) & 0x07;
1964 /* 000: Indicates jumpered 8-bit DMA if read-only.
1965 100: Indicates jumpered 16-bit DMA if read-only. */
1966 if ((dma & 0x03) == 0)
1967 dma = PARPORT_DMA_NONE;
1973 static int parport_dma_probe(struct parport *p)
1975 const struct parport_pc_private *priv = p->private_data;
1976 if (priv->ecr) /* ask ECP chipset first */
1977 p->dma = programmable_dma_support(p);
1978 if (p->dma == PARPORT_DMA_NONE) {
1979 /* ask known Super-IO chips proper, although these
1980 claim ECP compatible, some don't report their DMA
1981 conforming to ECP standards */
1982 p->dma = get_superio_dma(p);
1988 /* --- Initialisation code -------------------------------- */
1990 static LIST_HEAD(ports_list);
1991 static DEFINE_SPINLOCK(ports_lock);
1993 struct parport *parport_pc_probe_port(unsigned long int base,
1994 unsigned long int base_hi,
1999 struct parport_pc_private *priv;
2000 struct parport_operations *ops;
2002 int probedirq = PARPORT_IRQ_NONE;
2003 struct resource *base_res;
2004 struct resource *ECR_res = NULL;
2005 struct resource *EPP_res = NULL;
2006 struct platform_device *pdev = NULL;
2010 /* We need a physical device to attach to, but none was
2011 * provided. Create our own. */
2012 pdev = platform_device_register_simple("parport_pc",
2018 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
2020 dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
2021 dma = PARPORT_DMA_NONE;
2025 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
2029 priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
2033 /* a misnomer, actually - it's allocate and reserve parport number */
2034 p = parport_register_port(base, irq, dma, ops);
2038 base_res = request_region(base, 3, p->name);
2042 memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
2044 priv->ctr_writable = ~0x10;
2046 priv->fifo_depth = 0;
2047 priv->dma_buf = NULL;
2048 priv->dma_handle = 0;
2049 INIT_LIST_HEAD(&priv->list);
2053 p->base_hi = base_hi;
2054 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2055 p->private_data = priv;
2058 ECR_res = request_region(base_hi, 3, p->name);
2060 parport_ECR_present(p);
2063 if (base != 0x3bc) {
2064 EPP_res = request_region(base+0x3, 5, p->name);
2066 if (!parport_EPP_supported(p))
2067 parport_ECPEPP_supported(p);
2069 if (!parport_SPP_supported(p))
2073 parport_ECPPS2_supported(p);
2075 parport_PS2_supported(p);
2077 p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
2079 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2080 if (p->base_hi && priv->ecr)
2081 printk(KERN_CONT " (0x%lx)", p->base_hi);
2082 if (p->irq == PARPORT_IRQ_AUTO) {
2083 p->irq = PARPORT_IRQ_NONE;
2084 parport_irq_probe(p);
2085 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2086 p->irq = PARPORT_IRQ_NONE;
2087 parport_irq_probe(p);
2089 p->irq = PARPORT_IRQ_NONE;
2091 if (p->irq != PARPORT_IRQ_NONE) {
2092 printk(KERN_CONT ", irq %d", p->irq);
2093 priv->ctr_writable |= 0x10;
2095 if (p->dma == PARPORT_DMA_AUTO) {
2096 p->dma = PARPORT_DMA_NONE;
2097 parport_dma_probe(p);
2100 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2101 is mandatory (see above) */
2102 p->dma = PARPORT_DMA_NONE;
2104 #ifdef CONFIG_PARPORT_PC_FIFO
2105 if (parport_ECP_supported(p) &&
2106 p->dma != PARPORT_DMA_NOFIFO &&
2107 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2108 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2109 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2110 #ifdef CONFIG_PARPORT_1284
2111 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2112 /* currently broken, but working on it.. (FB) */
2113 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2114 #endif /* IEEE 1284 support */
2115 if (p->dma != PARPORT_DMA_NONE) {
2116 printk(KERN_CONT ", dma %d", p->dma);
2117 p->modes |= PARPORT_MODE_DMA;
2119 printk(KERN_CONT ", using FIFO");
2121 /* We can't use the DMA channel after all. */
2122 p->dma = PARPORT_DMA_NONE;
2123 #endif /* Allowed to use FIFO/DMA */
2125 printk(KERN_CONT " [");
2127 #define printmode(x) \
2129 if (p->modes & PARPORT_MODE_##x) {\
2130 printk(KERN_CONT "%s%s", f ? "," : "", #x);\
2138 printmode(TRISTATE);
2145 #ifndef CONFIG_PARPORT_1284
2146 printk(KERN_CONT "(,...)");
2147 #endif /* CONFIG_PARPORT_1284 */
2148 printk(KERN_CONT "]\n");
2149 if (probedirq != PARPORT_IRQ_NONE)
2150 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2152 /* If No ECP release the ports grabbed above. */
2153 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2154 release_region(base_hi, 3);
2157 /* Likewise for EEP ports */
2158 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2159 release_region(base+3, 5);
2162 if (p->irq != PARPORT_IRQ_NONE) {
2163 if (request_irq(p->irq, parport_irq_handler,
2164 irqflags, p->name, p)) {
2165 printk(KERN_WARNING "%s: irq %d in use, "
2166 "resorting to polled operation\n",
2168 p->irq = PARPORT_IRQ_NONE;
2169 p->dma = PARPORT_DMA_NONE;
2172 #ifdef CONFIG_PARPORT_PC_FIFO
2174 if (p->dma != PARPORT_DMA_NONE) {
2175 if (request_dma(p->dma, p->name)) {
2176 printk(KERN_WARNING "%s: dma %d in use, "
2177 "resorting to PIO operation\n",
2179 p->dma = PARPORT_DMA_NONE;
2182 dma_alloc_coherent(dev,
2186 if (!priv->dma_buf) {
2187 printk(KERN_WARNING "%s: "
2188 "cannot get buffer for DMA, "
2189 "resorting to PIO operation\n",
2192 p->dma = PARPORT_DMA_NONE;
2200 /* Done probing. Now put the port into a sensible start-up state. */
2203 * Put the ECP detected port in PS2 mode.
2204 * Do this also for ports that have ECR but don't do ECP.
2208 parport_pc_write_data(p, 0);
2209 parport_pc_data_forward(p);
2211 /* Now that we've told the sharing engine about the port, and
2212 found out its characteristics, let the high-level drivers
2214 spin_lock(&ports_lock);
2215 list_add(&priv->list, &ports_list);
2216 spin_unlock(&ports_lock);
2217 parport_announce_port(p);
2223 release_region(base_hi, 3);
2225 release_region(base+0x3, 5);
2226 release_region(base, 3);
2228 parport_put_port(p);
2235 platform_device_unregister(pdev);
2238 EXPORT_SYMBOL(parport_pc_probe_port);
2240 void parport_pc_unregister_port(struct parport *p)
2242 struct parport_pc_private *priv = p->private_data;
2243 struct parport_operations *ops = p->ops;
2245 parport_remove_port(p);
2246 spin_lock(&ports_lock);
2247 list_del_init(&priv->list);
2248 spin_unlock(&ports_lock);
2249 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2250 if (p->dma != PARPORT_DMA_NONE)
2253 if (p->irq != PARPORT_IRQ_NONE)
2254 free_irq(p->irq, p);
2255 release_region(p->base, 3);
2257 release_region(p->base + 3, p->size - 3);
2258 if (p->modes & PARPORT_MODE_ECP)
2259 release_region(p->base_hi, 3);
2260 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2262 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2266 kfree(p->private_data);
2267 parport_put_port(p);
2268 kfree(ops); /* hope no-one cached it */
2270 EXPORT_SYMBOL(parport_pc_unregister_port);
2274 /* ITE support maintained by Rich Liu <richliu@poorman.org> */
2275 static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
2276 const struct parport_pc_via_data *via)
2278 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2280 u32 ite8872_lpt, ite8872_lpthi;
2281 u8 ite8872_irq, type;
2285 DPRINTK(KERN_DEBUG "sio_ite_8872_probe()\n");
2287 /* make sure which one chip */
2288 for (i = 0; i < 5; i++) {
2289 if (request_region(inta_addr[i], 32, "it887x")) {
2291 pci_write_config_dword(pdev, 0x60,
2292 0xe5000000 | inta_addr[i]);
2293 pci_write_config_dword(pdev, 0x78,
2294 0x00000000 | inta_addr[i]);
2295 test = inb(inta_addr[i]);
2298 release_region(inta_addr[i], 32);
2302 printk(KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2306 type = inb(inta_addr[i] + 0x18);
2311 printk(KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2312 ite8872set = 0x64200000;
2315 printk(KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2316 ite8872set = 0x64200000;
2319 printk(KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2320 ite8872set = 0x64e00000;
2323 printk(KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2324 release_region(inta_addr[i], 32);
2327 printk(KERN_INFO "parport_pc: ITE8874 found (2S)\n");
2328 release_region(inta_addr[i], 32);
2331 printk(KERN_INFO "parport_pc: unknown ITE887x\n");
2332 printk(KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2333 "output to Rich.Liu@ite.com.tw\n");
2334 release_region(inta_addr[i], 32);
2338 pci_read_config_byte(pdev, 0x3c, &ite8872_irq);
2339 pci_read_config_dword(pdev, 0x1c, &ite8872_lpt);
2340 ite8872_lpt &= 0x0000ff00;
2341 pci_read_config_dword(pdev, 0x20, &ite8872_lpthi);
2342 ite8872_lpthi &= 0x0000ff00;
2343 pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2344 pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2345 pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2346 /* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */
2347 /* SET Parallel IRQ */
2348 pci_write_config_dword(pdev, 0x9c,
2349 ite8872set | (ite8872_irq * 0x11111));
2351 DPRINTK(KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2352 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2354 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2357 /* Let the user (or defaults) steer us away from interrupts */
2359 if (autoirq != PARPORT_IRQ_AUTO)
2360 irq = PARPORT_IRQ_NONE;
2363 * Release the resource so that parport_pc_probe_port can get it.
2365 release_region(inta_addr[i], 32);
2366 if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi,
2367 irq, PARPORT_DMA_NONE, &pdev->dev, 0)) {
2369 "parport_pc: ITE 8872 parallel port: io=0x%X",
2371 if (irq != PARPORT_IRQ_NONE)
2372 printk(", irq=%d", irq);
2380 /* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2381 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2382 static int parport_init_mode;
2384 /* Data for two known VIA chips */
2385 static struct parport_pc_via_data via_686a_data = {
2394 static struct parport_pc_via_data via_8231_data = {
2404 static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma,
2405 const struct parport_pc_via_data *via)
2407 u8 tmp, tmp2, siofunc;
2410 unsigned port1, port2;
2411 unsigned have_epp = 0;
2413 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2415 switch (parport_init_mode) {
2417 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2418 siofunc = VIA_FUNCTION_PARPORT_SPP;
2421 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2422 siofunc = VIA_FUNCTION_PARPORT_SPP;
2423 ppcontrol = VIA_PARPORT_BIDIR;
2426 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2427 siofunc = VIA_FUNCTION_PARPORT_EPP;
2428 ppcontrol = VIA_PARPORT_BIDIR;
2432 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2433 siofunc = VIA_FUNCTION_PARPORT_ECP;
2434 ppcontrol = VIA_PARPORT_BIDIR;
2437 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2438 siofunc = VIA_FUNCTION_PARPORT_ECP;
2439 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2444 "parport_pc: probing current configuration\n");
2445 siofunc = VIA_FUNCTION_PROBE;
2449 * unlock super i/o configuration
2451 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2452 tmp |= via->via_pci_superio_config_data;
2453 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2455 /* Bits 1-0: Parallel Port Mode / Enable */
2456 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2457 tmp = inb(VIA_CONFIG_DATA);
2458 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2459 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2460 tmp2 = inb(VIA_CONFIG_DATA);
2461 if (siofunc == VIA_FUNCTION_PROBE) {
2462 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2465 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2467 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2468 outb(tmp, VIA_CONFIG_DATA);
2469 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2471 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2472 outb(tmp2, VIA_CONFIG_DATA);
2475 /* Parallel Port I/O Base Address, bits 9-2 */
2476 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2477 port1 = inb(VIA_CONFIG_DATA) << 2;
2479 printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
2481 if (port1 == 0x3BC && have_epp) {
2482 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2483 outb((0x378 >> 2), VIA_CONFIG_DATA);
2485 "parport_pc: Parallel port base changed to 0x378\n");
2490 * lock super i/o configuration
2492 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2493 tmp &= ~via->via_pci_superio_config_data;
2494 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2496 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2497 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2501 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2502 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2503 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2505 if (siofunc == VIA_FUNCTION_PARPORT_ECP) {
2506 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2507 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2508 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2510 /* if ECP not enabled, DMA is not enabled, assumed
2511 bogus 'dma' value */
2512 dma = PARPORT_DMA_NONE;
2514 /* Let the user (or defaults) steer us away from interrupts and DMA */
2515 if (autoirq == PARPORT_IRQ_NONE) {
2516 irq = PARPORT_IRQ_NONE;
2517 dma = PARPORT_DMA_NONE;
2519 if (autodma == PARPORT_DMA_NONE)
2520 dma = PARPORT_DMA_NONE;
2524 port2 = 0x7bc; break;
2526 port2 = 0x778; break;
2528 port2 = 0x678; break;
2531 "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2536 /* filter bogus IRQs */
2542 irq = PARPORT_IRQ_NONE;
2545 default: /* do nothing */
2549 /* finally, do the probe with values obtained */
2550 if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) {
2552 "parport_pc: VIA parallel port: io=0x%X", port1);
2553 if (irq != PARPORT_IRQ_NONE)
2554 printk(", irq=%d", irq);
2555 if (dma != PARPORT_DMA_NONE)
2556 printk(", dma=%d", dma);
2561 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2567 enum parport_pc_sio_types {
2568 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2569 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2574 /* each element directly indexed from enum list, above */
2575 static struct parport_pc_superio {
2576 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2577 const struct parport_pc_via_data *via);
2578 const struct parport_pc_via_data *via;
2579 } parport_pc_superio_info[] = {
2580 { sio_via_probe, &via_686a_data, },
2581 { sio_via_probe, &via_8231_data, },
2582 { sio_ite_8872_probe, NULL, },
2585 enum parport_pc_pci_cards {
2586 siig_1p_10x = last_sio,
2591 lava_parallel_dual_a,
2592 lava_parallel_dual_b,
2622 /* each element directly indexed from enum list, above
2623 * (but offset by last_sio) */
2624 static struct parport_pc_pci {
2626 struct { /* BAR (base address registers) numbers in the config
2630 /* -1 if not there, >6 for offset-method (max BAR is 6) */
2633 /* If set, this is called immediately after pci_enable_device.
2634 * If it returns non-zero, no probing will take place and the
2635 * ports will not be used. */
2636 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2638 /* If set, this is called after probing for ports. If 'failed'
2639 * is non-zero we couldn't use any of the ports. */
2640 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2642 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2643 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2644 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2645 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2646 /* lava_parallel */ { 1, { { 0, -1 }, } },
2647 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2648 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2649 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2650 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2651 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2652 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2653 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2654 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2655 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2656 /* SYBA uses fixed offsets in
2658 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2659 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2660 /* titan_010l */ { 1, { { 3, -1 }, } },
2661 /* avlab_1p */ { 1, { { 0, 1}, } },
2662 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2663 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2664 * and 840 locks up if you write 1 to bit 2! */
2665 /* oxsemi_952 */ { 1, { { 0, 1 }, } },
2666 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2667 /* oxsemi_840 */ { 1, { { 0, 1 }, } },
2668 /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, } },
2669 /* aks_0100 */ { 1, { { 0, -1 }, } },
2670 /* mobility_pp */ { 1, { { 0, 1 }, } },
2672 /* The netmos entries below are untested */
2673 /* netmos_9705 */ { 1, { { 0, -1 }, } },
2674 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
2675 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
2676 /* netmos_9805 */ { 1, { { 0, 1 }, } },
2677 /* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2678 /* netmos_9901 */ { 1, { { 0, -1 }, } },
2679 /* netmos_9865 */ { 1, { { 0, -1 }, } },
2680 /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
2683 static const struct pci_device_id parport_pc_pci_tbl[] = {
2684 /* Super-IO onboard chips */
2685 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2686 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2687 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2688 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2691 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2692 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2693 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2694 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2695 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2696 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2697 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2698 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2699 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2700 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2701 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2702 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2703 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2704 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2705 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2706 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2707 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2708 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
2709 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2710 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2711 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2712 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2713 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2714 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2715 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2716 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2717 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2718 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2719 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2720 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2721 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2722 /* AFAVLAB_TK9902 */
2723 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
2724 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2725 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2726 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2727 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2728 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2729 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2730 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2731 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
2732 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2733 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
2734 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2735 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
2736 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2737 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
2738 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2739 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
2740 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2741 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
2742 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2743 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
2744 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2745 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
2746 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2747 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2748 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2749 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2750 /* NetMos communication controllers */
2751 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2752 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2753 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2754 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2755 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2756 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2757 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2758 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2759 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2760 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2761 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
2762 0xA000, 0x2000, 0, 0, netmos_9901 },
2763 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2764 0xA000, 0x1000, 0, 0, netmos_9865 },
2765 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2766 0xA000, 0x2000, 0, 0, netmos_9865 },
2767 /* Quatech SPPXP-100 Parallel port PCI ExpressCard */
2768 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
2769 PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
2770 { 0, } /* terminate list */
2772 MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
2774 struct pci_parport_data {
2776 struct parport *ports[2];
2779 static int parport_pc_pci_probe(struct pci_dev *dev,
2780 const struct pci_device_id *id)
2782 int err, count, n, i = id->driver_data;
2783 struct pci_parport_data *data;
2786 /* This is an onboard Super-IO and has already been probed */
2789 /* This is a PCI card */
2792 err = pci_enable_device(dev);
2796 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2800 if (cards[i].preinit_hook &&
2801 cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2806 for (n = 0; n < cards[i].numports; n++) {
2807 int lo = cards[i].addr[n].lo;
2808 int hi = cards[i].addr[n].hi;
2810 unsigned long io_lo, io_hi;
2811 io_lo = pci_resource_start(dev, lo);
2813 if ((hi >= 0) && (hi <= 6))
2814 io_hi = pci_resource_start(dev, hi);
2816 io_lo += hi; /* Reinterpret the meaning of
2817 "hi" as an offset (see SYBA
2819 /* TODO: test if sharing interrupts works */
2821 if (irq == IRQ_NONE) {
2823 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
2824 id->vendor, id->device, io_lo, io_hi);
2825 irq = PARPORT_IRQ_NONE;
2828 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
2829 id->vendor, id->device, io_lo, io_hi, irq);
2831 data->ports[count] =
2832 parport_pc_probe_port(io_lo, io_hi, irq,
2833 PARPORT_DMA_NONE, &dev->dev,
2835 if (data->ports[count])
2841 if (cards[i].postinit_hook)
2842 cards[i].postinit_hook(dev, count == 0);
2845 pci_set_drvdata(dev, data);
2854 static void parport_pc_pci_remove(struct pci_dev *dev)
2856 struct pci_parport_data *data = pci_get_drvdata(dev);
2860 for (i = data->num - 1; i >= 0; i--)
2861 parport_pc_unregister_port(data->ports[i]);
2867 static struct pci_driver parport_pc_pci_driver = {
2868 .name = "parport_pc",
2869 .id_table = parport_pc_pci_tbl,
2870 .probe = parport_pc_pci_probe,
2871 .remove = parport_pc_pci_remove,
2874 static int __init parport_pc_init_superio(int autoirq, int autodma)
2876 const struct pci_device_id *id;
2877 struct pci_dev *pdev = NULL;
2880 for_each_pci_dev(pdev) {
2881 id = pci_match_id(parport_pc_pci_tbl, pdev);
2882 if (id == NULL || id->driver_data >= last_sio)
2885 if (parport_pc_superio_info[id->driver_data].probe(
2886 pdev, autoirq, autodma,
2887 parport_pc_superio_info[id->driver_data].via)) {
2892 return ret; /* number of devices found */
2895 static struct pci_driver parport_pc_pci_driver;
2896 static int __init parport_pc_init_superio(int autoirq, int autodma)
2900 #endif /* CONFIG_PCI */
2904 static const struct pnp_device_id parport_pc_pnp_tbl[] = {
2905 /* Standard LPT Printer Port */
2906 {.id = "PNP0400", .driver_data = 0},
2907 /* ECP Printer Port */
2908 {.id = "PNP0401", .driver_data = 0},
2912 MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
2914 static int parport_pc_pnp_probe(struct pnp_dev *dev,
2915 const struct pnp_device_id *id)
2917 struct parport *pdata;
2918 unsigned long io_lo, io_hi;
2921 if (pnp_port_valid(dev, 0) &&
2922 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
2923 io_lo = pnp_port_start(dev, 0);
2927 if (pnp_port_valid(dev, 1) &&
2928 !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
2929 io_hi = pnp_port_start(dev, 1);
2933 if (pnp_irq_valid(dev, 0) &&
2934 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
2935 irq = pnp_irq(dev, 0);
2937 irq = PARPORT_IRQ_NONE;
2939 if (pnp_dma_valid(dev, 0) &&
2940 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
2941 dma = pnp_dma(dev, 0);
2943 dma = PARPORT_DMA_NONE;
2945 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
2946 pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
2950 pnp_set_drvdata(dev, pdata);
2954 static void parport_pc_pnp_remove(struct pnp_dev *dev)
2956 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
2960 parport_pc_unregister_port(pdata);
2963 /* we only need the pnp layer to activate the device, at least for now */
2964 static struct pnp_driver parport_pc_pnp_driver = {
2965 .name = "parport_pc",
2966 .id_table = parport_pc_pnp_tbl,
2967 .probe = parport_pc_pnp_probe,
2968 .remove = parport_pc_pnp_remove,
2972 static struct pnp_driver parport_pc_pnp_driver;
2973 #endif /* CONFIG_PNP */
2975 static int parport_pc_platform_probe(struct platform_device *pdev)
2977 /* Always succeed, the actual probing is done in
2978 * parport_pc_probe_port(). */
2982 static struct platform_driver parport_pc_platform_driver = {
2984 .owner = THIS_MODULE,
2985 .name = "parport_pc",
2987 .probe = parport_pc_platform_probe,
2990 /* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
2991 static int __attribute__((unused))
2992 parport_pc_find_isa_ports(int autoirq, int autodma)
2996 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
2998 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
3000 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
3006 /* This function is called by parport_pc_init if the user didn't
3007 * specify any ports to probe. Its job is to find some ports. Order
3008 * is important here -- we want ISA ports to be registered first,
3009 * followed by PCI cards (for least surprise), but before that we want
3010 * to do chipset-specific tests for some onboard ports that we know
3013 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3014 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3016 static void __init parport_pc_find_ports(int autoirq, int autodma)
3020 #ifdef CONFIG_PARPORT_PC_SUPERIO
3021 detect_and_report_it87();
3022 detect_and_report_winbond();
3023 detect_and_report_smsc();
3026 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3027 count += parport_pc_init_superio(autoirq, autodma);
3029 /* PnP ports, skip detection if SuperIO already found them */
3031 err = pnp_register_driver(&parport_pc_pnp_driver);
3033 pnp_registered_parport = 1;
3036 /* ISA ports and whatever (see asm/parport.h). */
3037 parport_pc_find_nonpci_ports(autoirq, autodma);
3039 err = pci_register_driver(&parport_pc_pci_driver);
3041 pci_registered_parport = 1;
3045 * Piles of crap below pretend to be a parser for module and kernel
3046 * parameters. Say "thank you" to whoever had come up with that
3047 * syntax and keep in mind that code below is a cleaned up version.
3050 static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
3051 [0 ... PARPORT_PC_MAX_PORTS] = 0
3053 static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
3054 [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
3056 static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
3057 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
3059 static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
3060 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
3063 static int __init parport_parse_param(const char *s, int *val,
3064 int automatic, int none, int nofifo)
3068 if (!strncmp(s, "auto", 4))
3070 else if (!strncmp(s, "none", 4))
3072 else if (nofifo && !strncmp(s, "nofifo", 6))
3076 unsigned long r = simple_strtoul(s, &ep, 0);
3080 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3087 static int __init parport_parse_irq(const char *irqstr, int *val)
3089 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3090 PARPORT_IRQ_NONE, 0);
3093 static int __init parport_parse_dma(const char *dmastr, int *val)
3095 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3096 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3100 static int __init parport_init_mode_setup(char *str)
3103 "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3105 if (!strcmp(str, "spp"))
3106 parport_init_mode = 1;
3107 if (!strcmp(str, "ps2"))
3108 parport_init_mode = 2;
3109 if (!strcmp(str, "epp"))
3110 parport_init_mode = 3;
3111 if (!strcmp(str, "ecp"))
3112 parport_init_mode = 4;
3113 if (!strcmp(str, "ecpepp"))
3114 parport_init_mode = 5;
3120 static char *irq[PARPORT_PC_MAX_PORTS];
3121 static char *dma[PARPORT_PC_MAX_PORTS];
3123 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3124 module_param_array(io, int, NULL, 0);
3125 MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3126 module_param_array(io_hi, int, NULL, 0);
3127 MODULE_PARM_DESC(irq, "IRQ line");
3128 module_param_array(irq, charp, NULL, 0);
3129 MODULE_PARM_DESC(dma, "DMA channel");
3130 module_param_array(dma, charp, NULL, 0);
3131 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3132 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3133 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3134 module_param(verbose_probing, int, 0644);
3137 static char *init_mode;
3138 MODULE_PARM_DESC(init_mode,
3139 "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3140 module_param(init_mode, charp, 0);
3143 static int __init parse_parport_params(void)
3150 parport_init_mode_setup(init_mode);
3153 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3154 if (parport_parse_irq(irq[i], &val))
3157 if (parport_parse_dma(dma[i], &val))
3162 /* The user can make us use any IRQs or DMAs we find. */
3163 if (irq[0] && !parport_parse_irq(irq[0], &val))
3165 case PARPORT_IRQ_NONE:
3166 case PARPORT_IRQ_AUTO:
3171 "parport_pc: irq specified "
3172 "without base address. Use 'io=' "
3173 "to specify one\n");
3176 if (dma[0] && !parport_parse_dma(dma[0], &val))
3178 case PARPORT_DMA_NONE:
3179 case PARPORT_DMA_AUTO:
3184 "parport_pc: dma specified "
3185 "without base address. Use 'io=' "
3186 "to specify one\n");
3194 static int parport_setup_ptr __initdata;
3197 * Acceptable parameters:
3201 * parport=0xBASE[,IRQ[,DMA]]
3203 * IRQ/DMA may be numeric or 'auto' or 'none'
3205 static int __init parport_setup(char *str)
3211 if (!str || !*str || (*str == '0' && !*(str+1))) {
3212 /* Disable parport if "parport=0" in cmdline */
3213 io[0] = PARPORT_DISABLE;
3217 if (!strncmp(str, "auto", 4)) {
3218 irqval[0] = PARPORT_IRQ_AUTO;
3219 dmaval[0] = PARPORT_DMA_AUTO;
3223 val = simple_strtoul(str, &endptr, 0);
3224 if (endptr == str) {
3225 printk(KERN_WARNING "parport=%s not understood\n", str);
3229 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3230 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3234 io[parport_setup_ptr] = val;
3235 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3236 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3238 sep = strchr(str, ',');
3240 if (parport_parse_irq(sep, &val))
3242 irqval[parport_setup_ptr] = val;
3243 sep = strchr(sep, ',');
3245 if (parport_parse_dma(sep, &val))
3247 dmaval[parport_setup_ptr] = val;
3250 parport_setup_ptr++;
3254 static int __init parse_parport_params(void)
3256 return io[0] == PARPORT_DISABLE;
3259 __setup("parport=", parport_setup);
3262 * Acceptable parameters:
3264 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3267 __setup("parport_init_mode=", parport_init_mode_setup);
3271 /* "Parser" ends here */
3273 static int __init parport_pc_init(void)
3277 if (parse_parport_params())
3280 err = platform_driver_register(&parport_pc_platform_driver);
3286 /* Only probe the ports we were given. */
3288 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3291 if (io_hi[i] == PARPORT_IOHI_AUTO)
3292 io_hi[i] = 0x400 + io[i];
3293 parport_pc_probe_port(io[i], io_hi[i],
3294 irqval[i], dmaval[i], NULL, 0);
3297 parport_pc_find_ports(irqval[0], dmaval[0]);
3302 static void __exit parport_pc_exit(void)
3304 if (pci_registered_parport)
3305 pci_unregister_driver(&parport_pc_pci_driver);
3306 if (pnp_registered_parport)
3307 pnp_unregister_driver(&parport_pc_pnp_driver);
3308 platform_driver_unregister(&parport_pc_platform_driver);
3310 while (!list_empty(&ports_list)) {
3311 struct parport_pc_private *priv;
3312 struct parport *port;
3313 priv = list_entry(ports_list.next,
3314 struct parport_pc_private, list);
3316 if (port->dev && port->dev->bus == &platform_bus_type)
3317 platform_device_unregister(
3318 to_platform_device(port->dev));
3319 parport_pc_unregister_port(port);
3323 MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3324 MODULE_DESCRIPTION("PC-style parallel port driver");
3325 MODULE_LICENSE("GPL");
3326 module_init(parport_pc_init)
3327 module_exit(parport_pc_exit)