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 #define DPRINTK printk
93 #define DPRINTK(stuff...)
98 static struct superio_struct { /* For Super-IO chips autodetection */
102 } superios[NR_SUPERIOS] = { {0,},};
104 static int user_specified;
105 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
106 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
107 static int verbose_probing;
109 static int pci_registered_parport;
110 static int pnp_registered_parport;
112 /* frob_control, but for ECR */
113 static void frob_econtrol(struct parport *pb, unsigned char m,
116 unsigned char ectr = 0;
119 ectr = inb(ECONTROL(pb));
121 DPRINTK(KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n",
122 m, v, ectr, (ectr & ~m) ^ v);
124 outb((ectr & ~m) ^ v, 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 DPRINTK(KERN_INFO "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... */
302 "%s: EPP timeout occurred while talking to w91284pic (should not have done)\n", port->name);
303 clear_epp_timeout(port);
308 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
309 if (!(((long)buf | length) & 0x03))
310 insl(EPPDATA(port), buf, (length >> 2));
312 insb(EPPDATA(port), buf, length);
313 if (inb(STATUS(port)) & 0x01) {
314 clear_epp_timeout(port);
319 for (; got < length; got++) {
320 *((char *)buf) = inb(EPPDATA(port));
322 if (inb(STATUS(port)) & 0x01) {
324 clear_epp_timeout(port);
332 static size_t parport_pc_epp_write_data(struct parport *port, const void *buf,
333 size_t length, int flags)
337 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
338 if (!(((long)buf | length) & 0x03))
339 outsl(EPPDATA(port), buf, (length >> 2));
341 outsb(EPPDATA(port), buf, length);
342 if (inb(STATUS(port)) & 0x01) {
343 clear_epp_timeout(port);
348 for (; written < length; written++) {
349 outb(*((char *)buf), EPPDATA(port));
351 if (inb(STATUS(port)) & 0x01) {
352 clear_epp_timeout(port);
360 static size_t parport_pc_epp_read_addr(struct parport *port, void *buf,
361 size_t length, int flags)
365 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
366 insb(EPPADDR(port), buf, length);
367 if (inb(STATUS(port)) & 0x01) {
368 clear_epp_timeout(port);
373 for (; got < length; got++) {
374 *((char *)buf) = inb(EPPADDR(port));
376 if (inb(STATUS(port)) & 0x01) {
377 clear_epp_timeout(port);
385 static size_t parport_pc_epp_write_addr(struct parport *port,
386 const void *buf, size_t length,
391 if ((flags & PARPORT_EPP_FAST) && (length > 1)) {
392 outsb(EPPADDR(port), buf, length);
393 if (inb(STATUS(port)) & 0x01) {
394 clear_epp_timeout(port);
399 for (; written < length; written++) {
400 outb(*((char *)buf), EPPADDR(port));
402 if (inb(STATUS(port)) & 0x01) {
403 clear_epp_timeout(port);
411 static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf,
412 size_t length, int flags)
416 frob_set_mode(port, ECR_EPP);
417 parport_pc_data_reverse(port);
418 parport_pc_write_control(port, 0x4);
419 got = parport_pc_epp_read_data(port, buf, length, flags);
420 frob_set_mode(port, ECR_PS2);
425 static size_t parport_pc_ecpepp_write_data(struct parport *port,
426 const void *buf, size_t length,
431 frob_set_mode(port, ECR_EPP);
432 parport_pc_write_control(port, 0x4);
433 parport_pc_data_forward(port);
434 written = parport_pc_epp_write_data(port, buf, length, flags);
435 frob_set_mode(port, ECR_PS2);
440 static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf,
441 size_t length, int flags)
445 frob_set_mode(port, ECR_EPP);
446 parport_pc_data_reverse(port);
447 parport_pc_write_control(port, 0x4);
448 got = parport_pc_epp_read_addr(port, buf, length, flags);
449 frob_set_mode(port, ECR_PS2);
454 static size_t parport_pc_ecpepp_write_addr(struct parport *port,
455 const void *buf, size_t length,
460 frob_set_mode(port, ECR_EPP);
461 parport_pc_write_control(port, 0x4);
462 parport_pc_data_forward(port);
463 written = parport_pc_epp_write_addr(port, buf, length, flags);
464 frob_set_mode(port, ECR_PS2);
468 #endif /* IEEE 1284 support */
470 #ifdef CONFIG_PARPORT_PC_FIFO
471 static size_t parport_pc_fifo_write_block_pio(struct parport *port,
472 const void *buf, size_t length)
475 const unsigned char *bufp = buf;
476 size_t left = length;
477 unsigned long expire = jiffies + port->physport->cad->timeout;
478 const int fifo = FIFO(port);
479 int poll_for = 8; /* 80 usecs */
480 const struct parport_pc_private *priv = port->physport->private_data;
481 const int fifo_depth = priv->fifo_depth;
483 port = port->physport;
485 /* We don't want to be interrupted every character. */
486 parport_pc_disable_irq(port);
487 /* set nErrIntrEn and serviceIntr */
488 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
491 parport_pc_data_forward(port); /* Must be in PS2 mode */
495 unsigned char ecrval = inb(ECONTROL(port));
498 if (need_resched() && time_before(jiffies, expire))
499 /* Can't yield the port. */
502 /* Anyone else waiting for the port? */
503 if (port->waithead) {
504 printk(KERN_DEBUG "Somebody wants the port\n");
509 /* FIFO is full. Wait for interrupt. */
511 /* Clear serviceIntr */
512 ECR_WRITE(port, ecrval & ~(1<<2));
514 ret = parport_wait_event(port, HZ);
518 if (!time_before(jiffies, expire)) {
520 printk(KERN_DEBUG "FIFO write timed out\n");
523 ecrval = inb(ECONTROL(port));
524 if (!(ecrval & (1<<2))) {
525 if (need_resched() &&
526 time_before(jiffies, expire))
535 /* Can't fail now. */
536 expire = jiffies + port->cad->timeout;
539 if (signal_pending(current))
543 /* FIFO is empty. Blast it full. */
544 const int n = left < fifo_depth ? left : fifo_depth;
545 outsb(fifo, bufp, n);
549 /* Adjust the poll time. */
550 if (i < (poll_for - 2))
553 } else if (i++ < poll_for) {
555 ecrval = inb(ECONTROL(port));
559 /* Half-full(call me an optimist) */
564 dump_parport_state("leave fifo_write_block_pio", port);
565 return length - left;
569 static size_t parport_pc_fifo_write_block_dma(struct parport *port,
570 const void *buf, size_t length)
573 unsigned long dmaflag;
574 size_t left = length;
575 const struct parport_pc_private *priv = port->physport->private_data;
576 struct device *dev = port->physport->dev;
577 dma_addr_t dma_addr, dma_handle;
578 size_t maxlen = 0x10000; /* max 64k per DMA transfer */
579 unsigned long start = (unsigned long) buf;
580 unsigned long end = (unsigned long) buf + length - 1;
582 dump_parport_state("enter fifo_write_block_dma", port);
583 if (end < MAX_DMA_ADDRESS) {
584 /* If it would cross a 64k boundary, cap it at the end. */
585 if ((start ^ end) & ~0xffffUL)
586 maxlen = 0x10000 - (start & 0xffff);
588 dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length,
591 /* above 16 MB we use a bounce buffer as ISA-DMA
593 maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */
594 dma_addr = priv->dma_handle;
598 port = port->physport;
600 /* We don't want to be interrupted every character. */
601 parport_pc_disable_irq(port);
602 /* set nErrIntrEn and serviceIntr */
603 frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2));
606 parport_pc_data_forward(port); /* Must be in PS2 mode */
609 unsigned long expire = jiffies + port->physport->cad->timeout;
616 if (!dma_handle) /* bounce buffer ! */
617 memcpy(priv->dma_buf, buf, count);
619 dmaflag = claim_dma_lock();
620 disable_dma(port->dma);
621 clear_dma_ff(port->dma);
622 set_dma_mode(port->dma, DMA_MODE_WRITE);
623 set_dma_addr(port->dma, dma_addr);
624 set_dma_count(port->dma, count);
627 frob_econtrol(port, 1<<3, 1<<3);
629 /* Clear serviceIntr */
630 frob_econtrol(port, 1<<2, 0);
632 enable_dma(port->dma);
633 release_dma_lock(dmaflag);
635 /* assume DMA will be successful */
641 /* Wait for interrupt. */
643 ret = parport_wait_event(port, HZ);
647 if (!time_before(jiffies, expire)) {
649 printk(KERN_DEBUG "DMA write timed out\n");
652 /* Is serviceIntr set? */
653 if (!(inb(ECONTROL(port)) & (1<<2))) {
659 dmaflag = claim_dma_lock();
660 disable_dma(port->dma);
661 clear_dma_ff(port->dma);
662 count = get_dma_residue(port->dma);
663 release_dma_lock(dmaflag);
665 cond_resched(); /* Can't yield the port. */
667 /* Anyone else waiting for the port? */
668 if (port->waithead) {
669 printk(KERN_DEBUG "Somebody wants the port\n");
673 /* update for possible DMA residue ! */
680 /* Maybe got here through break, so adjust for DMA residue! */
681 dmaflag = claim_dma_lock();
682 disable_dma(port->dma);
683 clear_dma_ff(port->dma);
684 left += get_dma_residue(port->dma);
685 release_dma_lock(dmaflag);
687 /* Turn off DMA mode */
688 frob_econtrol(port, 1<<3, 0);
691 dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE);
693 dump_parport_state("leave fifo_write_block_dma", port);
694 return length - left;
698 static inline size_t parport_pc_fifo_write_block(struct parport *port,
699 const void *buf, size_t length)
702 if (port->dma != PARPORT_DMA_NONE)
703 return parport_pc_fifo_write_block_dma(port, buf, length);
705 return parport_pc_fifo_write_block_pio(port, buf, length);
708 /* Parallel Port FIFO mode (ECP chipsets) */
709 static size_t parport_pc_compat_write_block_pio(struct parport *port,
710 const void *buf, size_t length,
715 unsigned long expire;
716 const struct parport_pc_private *priv = port->physport->private_data;
718 /* Special case: a timeout of zero means we cannot call schedule().
719 * Also if O_NONBLOCK is set then use the default implementation. */
720 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
721 return parport_ieee1284_write_compat(port, buf,
724 /* Set up parallel port FIFO mode.*/
725 parport_pc_data_forward(port); /* Must be in PS2 mode */
726 parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0);
727 r = change_mode(port, ECR_PPF); /* Parallel port FIFO */
729 printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n",
732 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
734 /* Write the data to the FIFO. */
735 written = parport_pc_fifo_write_block(port, buf, length);
738 /* For some hardware we don't want to touch the mode until
739 * the FIFO is empty, so allow 4 seconds for each position
742 expire = jiffies + (priv->fifo_depth * HZ * 4);
744 /* Wait for the FIFO to empty */
745 r = change_mode(port, ECR_PS2);
748 } while (time_before(jiffies, expire));
751 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
753 /* Prevent further data transfer. */
754 frob_set_mode(port, ECR_TST);
756 /* Adjust for the contents of the FIFO. */
757 for (written -= priv->fifo_depth; ; written++) {
758 if (inb(ECONTROL(port)) & 0x2) {
765 /* Reset the FIFO and return to PS2 mode. */
766 frob_set_mode(port, ECR_PS2);
769 r = parport_wait_peripheral(port,
771 PARPORT_STATUS_BUSY);
774 "%s: BUSY timeout (%d) in compat_write_block_pio\n",
777 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
783 #ifdef CONFIG_PARPORT_1284
784 static size_t parport_pc_ecp_write_block_pio(struct parport *port,
785 const void *buf, size_t length,
790 unsigned long expire;
791 const struct parport_pc_private *priv = port->physport->private_data;
793 /* Special case: a timeout of zero means we cannot call schedule().
794 * Also if O_NONBLOCK is set then use the default implementation. */
795 if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK)
796 return parport_ieee1284_ecp_write_data(port, buf,
799 /* Switch to forward mode if necessary. */
800 if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {
801 /* Event 47: Set nInit high. */
802 parport_frob_control(port,
804 | PARPORT_CONTROL_AUTOFD,
806 | PARPORT_CONTROL_AUTOFD);
808 /* Event 49: PError goes high. */
809 r = parport_wait_peripheral(port,
810 PARPORT_STATUS_PAPEROUT,
811 PARPORT_STATUS_PAPEROUT);
813 printk(KERN_DEBUG "%s: PError timeout (%d) "
814 "in ecp_write_block_pio\n", port->name, r);
818 /* Set up ECP parallel port mode.*/
819 parport_pc_data_forward(port); /* Must be in PS2 mode */
820 parport_pc_frob_control(port,
821 PARPORT_CONTROL_STROBE |
822 PARPORT_CONTROL_AUTOFD,
824 r = change_mode(port, ECR_ECP); /* ECP FIFO */
826 printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n",
828 port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA;
830 /* Write the data to the FIFO. */
831 written = parport_pc_fifo_write_block(port, buf, length);
834 /* For some hardware we don't want to touch the mode until
835 * the FIFO is empty, so allow 4 seconds for each position
838 expire = jiffies + (priv->fifo_depth * (HZ * 4));
840 /* Wait for the FIFO to empty */
841 r = change_mode(port, ECR_PS2);
844 } while (time_before(jiffies, expire));
847 printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name);
849 /* Prevent further data transfer. */
850 frob_set_mode(port, ECR_TST);
852 /* Adjust for the contents of the FIFO. */
853 for (written -= priv->fifo_depth; ; written++) {
854 if (inb(ECONTROL(port)) & 0x2) {
861 /* Reset the FIFO and return to PS2 mode. */
862 frob_set_mode(port, ECR_PS2);
864 /* Host transfer recovery. */
865 parport_pc_data_reverse(port); /* Must be in PS2 mode */
867 parport_frob_control(port, PARPORT_CONTROL_INIT, 0);
868 r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0);
870 printk(KERN_DEBUG "%s: PE,1 timeout (%d) "
871 "in ecp_write_block_pio\n", port->name, r);
873 parport_frob_control(port,
874 PARPORT_CONTROL_INIT,
875 PARPORT_CONTROL_INIT);
876 r = parport_wait_peripheral(port,
877 PARPORT_STATUS_PAPEROUT,
878 PARPORT_STATUS_PAPEROUT);
880 printk(KERN_DEBUG "%s: PE,2 timeout (%d) "
881 "in ecp_write_block_pio\n", port->name, r);
884 r = parport_wait_peripheral(port,
886 PARPORT_STATUS_BUSY);
889 "%s: BUSY timeout (%d) in ecp_write_block_pio\n",
892 port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
896 #endif /* IEEE 1284 support */
897 #endif /* Allowed to use FIFO/DMA */
901 * ******************************************
902 * INITIALISATION AND MODULE STUFF BELOW HERE
903 * ******************************************
906 /* GCC is not inlining extern inline function later overwritten to non-inline,
907 so we use outlined_ variants here. */
908 static const struct parport_operations parport_pc_ops = {
909 .write_data = parport_pc_write_data,
910 .read_data = parport_pc_read_data,
912 .write_control = parport_pc_write_control,
913 .read_control = parport_pc_read_control,
914 .frob_control = parport_pc_frob_control,
916 .read_status = parport_pc_read_status,
918 .enable_irq = parport_pc_enable_irq,
919 .disable_irq = parport_pc_disable_irq,
921 .data_forward = parport_pc_data_forward,
922 .data_reverse = parport_pc_data_reverse,
924 .init_state = parport_pc_init_state,
925 .save_state = parport_pc_save_state,
926 .restore_state = parport_pc_restore_state,
928 .epp_write_data = parport_ieee1284_epp_write_data,
929 .epp_read_data = parport_ieee1284_epp_read_data,
930 .epp_write_addr = parport_ieee1284_epp_write_addr,
931 .epp_read_addr = parport_ieee1284_epp_read_addr,
933 .ecp_write_data = parport_ieee1284_ecp_write_data,
934 .ecp_read_data = parport_ieee1284_ecp_read_data,
935 .ecp_write_addr = parport_ieee1284_ecp_write_addr,
937 .compat_write_data = parport_ieee1284_write_compat,
938 .nibble_read_data = parport_ieee1284_read_nibble,
939 .byte_read_data = parport_ieee1284_read_byte,
941 .owner = THIS_MODULE,
944 #ifdef CONFIG_PARPORT_PC_SUPERIO
946 static struct superio_struct *find_free_superio(void)
949 for (i = 0; i < NR_SUPERIOS; i++)
950 if (superios[i].io == 0)
956 /* Super-IO chipset detection, Winbond, SMSC */
957 static void show_parconfig_smsc37c669(int io, int key)
959 int cr1, cr4, cra, cr23, cr26, cr27;
960 struct superio_struct *s;
962 static const char *const modes[] = {
963 "SPP and Bidirectional (PS/2)",
984 if (verbose_probing) {
986 "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, "
987 "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n",
988 cr1, cr4, cra, cr23, cr26, cr27);
990 /* The documentation calls DMA and IRQ-Lines by letters, so
991 the board maker can/will wire them
992 appropriately/randomly... G=reserved H=IDE-irq, */
994 "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n",
996 (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-',
997 (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-',
999 printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n",
1000 (cr23 * 4 >= 0x100) ? "yes" : "no",
1001 (cr1 & 4) ? "yes" : "no");
1003 "SMSC LPT Config: Port mode=%s, EPP version =%s\n",
1004 (cr1 & 0x08) ? "Standard mode only (SPP)"
1005 : modes[cr4 & 0x03],
1006 (cr4 & 0x40) ? "1.7" : "1.9");
1009 /* Heuristics ! BIOS setup for this mainboard device limits
1010 the choices to standard settings, i.e. io-address and IRQ
1011 are related, however DMA can be 1 or 3, assume DMA_A=DMA1,
1012 DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */
1013 if (cr23 * 4 >= 0x100) { /* if active */
1014 s = find_free_superio();
1016 printk(KERN_INFO "Super-IO: too many chips!\n");
1033 if (d == 1 || d == 3)
1036 s->dma = PARPORT_DMA_NONE;
1042 static void show_parconfig_winbond(int io, int key)
1044 int cr30, cr60, cr61, cr70, cr74, crf0;
1045 struct superio_struct *s;
1046 static const char *const modes[] = {
1047 "Standard (SPP) and Bidirectional(PS/2)", /* 0 */
1052 "EPP-1.7 and SPP", /* 5 */
1054 "ECP and EPP-1.7" };
1055 static char *const irqtypes[] = {
1056 "pulsed low, high-Z",
1059 /* The registers are called compatible-PnP because the
1060 register layout is modelled after ISA-PnP, the access
1061 method is just another ... */
1064 outb(0x07, io); /* Register 7: Select Logical Device */
1065 outb(0x01, io + 1); /* LD1 is Parallel Port */
1080 if (verbose_probing) {
1082 "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n",
1083 cr30, cr60, cr61, cr70, cr74, crf0);
1084 printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ",
1085 (cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f);
1086 if ((cr74 & 0x07) > 3)
1087 pr_cont("dma=none\n");
1089 pr_cont("dma=%d\n", cr74 & 0x07);
1091 "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n",
1092 irqtypes[crf0>>7], (crf0>>3)&0x0f);
1093 printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n",
1094 modes[crf0 & 0x07]);
1097 if (cr30 & 0x01) { /* the settings can be interrogated later ... */
1098 s = find_free_superio();
1100 printk(KERN_INFO "Super-IO: too many chips!\n");
1102 s->io = (cr60 << 8) | cr61;
1103 s->irq = cr70 & 0x0f;
1104 s->dma = (((cr74 & 0x07) > 3) ?
1105 PARPORT_DMA_NONE : (cr74 & 0x07));
1110 static void decode_winbond(int efer, int key, int devid, int devrev, int oldid)
1112 const char *type = "unknown";
1115 if (devid == devrev)
1116 /* simple heuristics, we happened to read some
1117 non-winbond register */
1120 id = (devid << 8) | devrev;
1122 /* Values are from public data sheets pdf files, I can just
1123 confirm 83977TF is correct :-) */
1126 else if (id == 0x9773)
1127 type = "83977TF / SMSC 97w33x/97w34x";
1128 else if (id == 0x9774)
1130 else if ((id & ~0x0f) == 0x5270)
1131 type = "83977CTF / SMSC 97w36x";
1132 else if ((id & ~0x0f) == 0x52f0)
1133 type = "83977EF / SMSC 97w35x";
1134 else if ((id & ~0x0f) == 0x5210)
1136 else if ((id & ~0x0f) == 0x6010)
1138 else if ((oldid & 0x0f) == 0x0a) {
1141 } else if ((oldid & 0x0f) == 0x0b) {
1144 } else if ((oldid & 0x0f) == 0x0c) {
1147 } else if ((oldid & 0x0f) == 0x0d) {
1153 if (verbose_probing)
1154 printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x "
1155 "devid=%02x devrev=%02x oldid=%02x type=%s\n",
1156 efer, key, devid, devrev, oldid, type);
1159 show_parconfig_winbond(efer, key);
1162 static void decode_smsc(int efer, int key, int devid, int devrev)
1164 const char *type = "unknown";
1165 void (*func)(int io, int key);
1168 if (devid == devrev)
1169 /* simple heuristics, we happened to read some
1170 non-smsc register */
1174 id = (devid << 8) | devrev;
1178 func = show_parconfig_smsc37c669;
1179 } else if (id == 0x6582)
1181 else if (devid == 0x65)
1183 else if (devid == 0x66)
1186 if (verbose_probing)
1187 printk(KERN_INFO "SMSC chip at EFER=0x%x "
1188 "key=0x%02x devid=%02x devrev=%02x type=%s\n",
1189 efer, key, devid, devrev, type);
1196 static void winbond_check(int io, int key)
1198 int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1200 if (!request_region(io, 3, __func__))
1203 origval = inb(io); /* Save original value */
1205 /* First probe without key */
1207 x_devid = inb(io + 1);
1209 x_devrev = inb(io + 1);
1211 x_oldid = inb(io + 1);
1214 outb(key, io); /* Write Magic Sequence to EFER, extended
1215 function enable register */
1216 outb(0x20, io); /* Write EFIR, extended function index register */
1217 devid = inb(io + 1); /* Read EFDR, extended function data register */
1219 devrev = inb(io + 1);
1221 oldid = inb(io + 1);
1222 outb(0xaa, io); /* Magic Seal */
1224 outb(origval, io); /* in case we poked some entirely different hardware */
1226 if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid))
1227 goto out; /* protection against false positives */
1229 decode_winbond(io, key, devid, devrev, oldid);
1231 release_region(io, 3);
1234 static void winbond_check2(int io, int key)
1236 int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid;
1238 if (!request_region(io, 3, __func__))
1241 origval[0] = inb(io); /* Save original values */
1242 origval[1] = inb(io + 1);
1243 origval[2] = inb(io + 2);
1245 /* First probe without the key */
1247 x_devid = inb(io + 2);
1249 x_devrev = inb(io + 2);
1251 x_oldid = inb(io + 2);
1253 outb(key, io); /* Write Magic Byte to EFER, extended
1254 function enable register */
1255 outb(0x20, io + 2); /* Write EFIR, extended function index register */
1256 devid = inb(io + 2); /* Read EFDR, extended function data register */
1258 devrev = inb(io + 2);
1260 oldid = inb(io + 2);
1261 outb(0xaa, io); /* Magic Seal */
1263 outb(origval[0], io); /* in case we poked some entirely different hardware */
1264 outb(origval[1], io + 1);
1265 outb(origval[2], io + 2);
1267 if (x_devid == devid && x_devrev == devrev && x_oldid == oldid)
1268 goto out; /* protection against false positives */
1270 decode_winbond(io, key, devid, devrev, oldid);
1272 release_region(io, 3);
1275 static void smsc_check(int io, int key)
1277 int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev;
1279 if (!request_region(io, 3, __func__))
1282 origval = inb(io); /* Save original value */
1284 /* First probe without the key */
1286 x_oldid = inb(io + 1);
1288 x_oldrev = inb(io + 1);
1292 x_rev = inb(io + 1);
1295 outb(key, io); /* Write Magic Sequence to EFER, extended
1296 function enable register */
1297 outb(0x0d, io); /* Write EFIR, extended function index register */
1298 oldid = inb(io + 1); /* Read EFDR, extended function data register */
1300 oldrev = inb(io + 1);
1305 outb(0xaa, io); /* Magic Seal */
1307 outb(origval, io); /* in case we poked some entirely different hardware */
1309 if (x_id == id && x_oldrev == oldrev &&
1310 x_oldid == oldid && x_rev == rev)
1311 goto out; /* protection against false positives */
1313 decode_smsc(io, key, oldid, oldrev);
1315 release_region(io, 3);
1319 static void detect_and_report_winbond(void)
1321 if (verbose_probing)
1322 printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n");
1323 winbond_check(0x3f0, 0x87);
1324 winbond_check(0x370, 0x87);
1325 winbond_check(0x2e , 0x87);
1326 winbond_check(0x4e , 0x87);
1327 winbond_check(0x3f0, 0x86);
1328 winbond_check2(0x250, 0x88);
1329 winbond_check2(0x250, 0x89);
1332 static void detect_and_report_smsc(void)
1334 if (verbose_probing)
1335 printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n");
1336 smsc_check(0x3f0, 0x55);
1337 smsc_check(0x370, 0x55);
1338 smsc_check(0x3f0, 0x44);
1339 smsc_check(0x370, 0x44);
1342 static void detect_and_report_it87(void)
1346 if (verbose_probing)
1347 printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n");
1348 if (!request_muxed_region(0x2e, 2, __func__))
1350 origval = inb(0x2e); /* Save original value */
1356 dev = inb(0x2f) << 8;
1359 if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 ||
1360 dev == 0x8716 || dev == 0x8718 || dev == 0x8726) {
1361 printk(KERN_INFO "IT%04X SuperIO detected.\n", dev);
1362 outb(0x07, 0x2E); /* Parallel Port */
1364 outb(0xF0, 0x2E); /* BOOT 0x80 off */
1368 outb(0x02, 0x2E); /* Lock */
1371 outb(origval, 0x2e); /* Oops, sorry to disturb */
1373 release_region(0x2e, 2);
1375 #endif /* CONFIG_PARPORT_PC_SUPERIO */
1377 static struct superio_struct *find_superio(struct parport *p)
1380 for (i = 0; i < NR_SUPERIOS; i++)
1381 if (superios[i].io == p->base)
1382 return &superios[i];
1386 static int get_superio_dma(struct parport *p)
1388 struct superio_struct *s = find_superio(p);
1391 return PARPORT_DMA_NONE;
1394 static int get_superio_irq(struct parport *p)
1396 struct superio_struct *s = find_superio(p);
1399 return PARPORT_IRQ_NONE;
1403 /* --- Mode detection ------------------------------------- */
1406 * Checks for port existence, all ports support SPP MODE
1408 * 0 : No parallel port at this address
1409 * PARPORT_MODE_PCSPP : SPP port detected
1410 * (if the user specified an ioport himself,
1411 * this shall always be the case!)
1414 static int parport_SPP_supported(struct parport *pb)
1419 * first clear an eventually pending EPP timeout
1420 * I (sailer@ife.ee.ethz.ch) have an SMSC chipset
1421 * that does not even respond to SPP cycles if an EPP
1422 * timeout is pending
1424 clear_epp_timeout(pb);
1426 /* Do a simple read-write test to make sure the port exists. */
1428 outb(w, CONTROL(pb));
1430 /* Is there a control register that we can read from? Some
1431 * ports don't allow reads, so read_control just returns a
1432 * software copy. Some ports _do_ allow reads, so bypass the
1433 * software copy here. In addition, some bits aren't
1435 r = inb(CONTROL(pb));
1436 if ((r & 0xf) == w) {
1438 outb(w, CONTROL(pb));
1439 r = inb(CONTROL(pb));
1440 outb(0xc, CONTROL(pb));
1442 return PARPORT_MODE_PCSPP;
1446 /* That didn't work, but the user thinks there's a
1448 printk(KERN_INFO "parport 0x%lx (WARNING): CTR: "
1449 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1451 /* Try the data register. The data lines aren't tri-stated at
1452 * this stage, so we expect back what we wrote. */
1454 parport_pc_write_data(pb, w);
1455 r = parport_pc_read_data(pb);
1458 parport_pc_write_data(pb, w);
1459 r = parport_pc_read_data(pb);
1461 return PARPORT_MODE_PCSPP;
1464 if (user_specified) {
1465 /* Didn't work, but the user is convinced this is the
1467 printk(KERN_INFO "parport 0x%lx (WARNING): DATA: "
1468 "wrote 0x%02x, read 0x%02x\n", pb->base, w, r);
1469 printk(KERN_INFO "parport 0x%lx: You gave this address, "
1470 "but there is probably no parallel port there!\n",
1474 /* It's possible that we can't read the control register or
1475 * the data register. In that case just believe the user. */
1477 return PARPORT_MODE_PCSPP;
1484 * Old style XT ports alias io ports every 0x400, hence accessing ECR
1485 * on these cards actually accesses the CTR.
1487 * Modern cards don't do this but reading from ECR will return 0xff
1488 * regardless of what is written here if the card does NOT support
1491 * We first check to see if ECR is the same as CTR. If not, the low
1492 * two bits of ECR aren't writable, so we check by writing ECR and
1493 * reading it back to see if it's what we expect.
1495 static int parport_ECR_present(struct parport *pb)
1497 struct parport_pc_private *priv = pb->private_data;
1498 unsigned char r = 0xc;
1500 outb(r, CONTROL(pb));
1501 if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) {
1502 outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */
1504 r = inb(CONTROL(pb));
1505 if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2))
1506 goto no_reg; /* Sure that no ECR register exists */
1509 if ((inb(ECONTROL(pb)) & 0x3) != 0x1)
1512 ECR_WRITE(pb, 0x34);
1513 if (inb(ECONTROL(pb)) != 0x35)
1517 outb(0xc, CONTROL(pb));
1519 /* Go to mode 000 */
1520 frob_set_mode(pb, ECR_SPP);
1525 outb(0xc, CONTROL(pb));
1529 #ifdef CONFIG_PARPORT_1284
1530 /* Detect PS/2 support.
1532 * Bit 5 (0x20) sets the PS/2 data direction; setting this high
1533 * allows us to read data from the data lines. In theory we would get back
1534 * 0xff but any peripheral attached to the port may drag some or all of the
1535 * lines down to zero. So if we get back anything that isn't the contents
1536 * of the data register we deem PS/2 support to be present.
1538 * Some SPP ports have "half PS/2" ability - you can't turn off the line
1539 * drivers, but an external peripheral with sufficiently beefy drivers of
1540 * its own can overpower them and assert its own levels onto the bus, from
1541 * where they can then be read back as normal. Ports with this property
1542 * and the right type of device attached are likely to fail the SPP test,
1543 * (as they will appear to have stuck bits) and so the fact that they might
1544 * be misdetected here is rather academic.
1547 static int parport_PS2_supported(struct parport *pb)
1551 clear_epp_timeout(pb);
1553 /* try to tri-state the buffer */
1554 parport_pc_data_reverse(pb);
1556 parport_pc_write_data(pb, 0x55);
1557 if (parport_pc_read_data(pb) != 0x55)
1560 parport_pc_write_data(pb, 0xaa);
1561 if (parport_pc_read_data(pb) != 0xaa)
1564 /* cancel input mode */
1565 parport_pc_data_forward(pb);
1568 pb->modes |= PARPORT_MODE_TRISTATE;
1570 struct parport_pc_private *priv = pb->private_data;
1571 priv->ctr_writable &= ~0x20;
1577 #ifdef CONFIG_PARPORT_PC_FIFO
1578 static int parport_ECP_supported(struct parport *pb)
1581 int config, configb;
1583 struct parport_pc_private *priv = pb->private_data;
1584 /* Translate ECP intrLine to ISA irq value */
1585 static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 };
1587 /* If there is no ECR, we have no hope of supporting ECP. */
1591 /* Find out FIFO depth */
1592 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1593 ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */
1594 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++)
1595 outb(0xaa, FIFO(pb));
1598 * Using LGS chipset it uses ECR register, but
1599 * it doesn't support ECP or FIFO MODE
1602 ECR_WRITE(pb, ECR_SPP << 5);
1606 priv->fifo_depth = i;
1607 if (verbose_probing)
1608 printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i);
1610 /* Find out writeIntrThreshold */
1611 frob_econtrol(pb, 1<<2, 1<<2);
1612 frob_econtrol(pb, 1<<2, 0);
1613 for (i = 1; i <= priv->fifo_depth; i++) {
1616 if (inb(ECONTROL(pb)) & (1<<2))
1620 if (i <= priv->fifo_depth) {
1621 if (verbose_probing)
1622 printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n",
1625 /* Number of bytes we know we can write if we get an
1629 priv->writeIntrThreshold = i;
1631 /* Find out readIntrThreshold */
1632 frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */
1633 parport_pc_data_reverse(pb); /* Must be in PS2 mode */
1634 frob_set_mode(pb, ECR_TST); /* Test FIFO */
1635 frob_econtrol(pb, 1<<2, 1<<2);
1636 frob_econtrol(pb, 1<<2, 0);
1637 for (i = 1; i <= priv->fifo_depth; i++) {
1638 outb(0xaa, FIFO(pb));
1639 if (inb(ECONTROL(pb)) & (1<<2))
1643 if (i <= priv->fifo_depth) {
1644 if (verbose_probing)
1645 printk(KERN_INFO "0x%lx: readIntrThreshold is %d\n",
1648 /* Number of bytes we can read if we get an interrupt. */
1651 priv->readIntrThreshold = i;
1653 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1654 ECR_WRITE(pb, 0xf4); /* Configuration mode */
1655 config = inb(CONFIGA(pb));
1656 pword = (config >> 4) & 0x7;
1660 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1665 printk(KERN_WARNING "0x%lx: Unsupported pword size!\n",
1669 printk(KERN_WARNING "0x%lx: Unknown implementation ID\n",
1671 /* Fall through - Assume 1 */
1675 priv->pword = pword;
1677 if (verbose_probing) {
1678 printk(KERN_DEBUG "0x%lx: PWord is %d bits\n",
1679 pb->base, 8 * pword);
1681 printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base,
1682 config & 0x80 ? "Level" : "Pulses");
1684 configb = inb(CONFIGB(pb));
1685 printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n",
1686 pb->base, config, configb);
1687 printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base);
1688 if ((configb >> 3) & 0x07)
1689 pr_cont("%d", intrline[(configb >> 3) & 0x07]);
1691 pr_cont("<none or set by other means>");
1693 if ((configb & 0x03) == 0x00)
1694 pr_cont("<none or set by other means>\n");
1696 pr_cont("%d\n", configb & 0x07);
1699 /* Go back to mode 000 */
1700 frob_set_mode(pb, ECR_SPP);
1706 #ifdef CONFIG_X86_32
1707 static int intel_bug_present_check_epp(struct parport *pb)
1709 const struct parport_pc_private *priv = pb->private_data;
1710 int bug_present = 0;
1713 /* store value of ECR */
1714 unsigned char ecr = inb(ECONTROL(pb));
1716 for (i = 0x00; i < 0x80; i += 0x20) {
1718 if (clear_epp_timeout(pb)) {
1719 /* Phony EPP in ECP. */
1724 /* return ECR into the inital state */
1730 static int intel_bug_present(struct parport *pb)
1732 /* Check whether the device is legacy, not PCI or PCMCIA. Only legacy is known to be affected. */
1733 if (pb->dev != NULL) {
1737 return intel_bug_present_check_epp(pb);
1740 static int intel_bug_present(struct parport *pb)
1744 #endif /* CONFIG_X86_32 */
1746 static int parport_ECPPS2_supported(struct parport *pb)
1748 const struct parport_pc_private *priv = pb->private_data;
1755 oecr = inb(ECONTROL(pb));
1756 ECR_WRITE(pb, ECR_PS2 << 5);
1757 result = parport_PS2_supported(pb);
1758 ECR_WRITE(pb, oecr);
1762 /* EPP mode detection */
1764 static int parport_EPP_supported(struct parport *pb)
1768 * Bit 0 of STR is the EPP timeout bit, this bit is 0
1769 * when EPP is possible and is set high when an EPP timeout
1770 * occurs (EPP uses the HALT line to stop the CPU while it does
1771 * the byte transfer, an EPP timeout occurs if the attached
1772 * device fails to respond after 10 micro seconds).
1774 * This bit is cleared by either reading it (National Semi)
1775 * or writing a 1 to the bit (SMC, UMC, WinBond), others ???
1776 * This bit is always high in non EPP modes.
1779 /* If EPP timeout bit clear then EPP available */
1780 if (!clear_epp_timeout(pb))
1781 return 0; /* No way to clear timeout */
1783 /* Check for Intel bug. */
1784 if (intel_bug_present(pb))
1787 pb->modes |= PARPORT_MODE_EPP;
1789 /* Set up access functions to use EPP hardware. */
1790 pb->ops->epp_read_data = parport_pc_epp_read_data;
1791 pb->ops->epp_write_data = parport_pc_epp_write_data;
1792 pb->ops->epp_read_addr = parport_pc_epp_read_addr;
1793 pb->ops->epp_write_addr = parport_pc_epp_write_addr;
1798 static int parport_ECPEPP_supported(struct parport *pb)
1800 struct parport_pc_private *priv = pb->private_data;
1807 oecr = inb(ECONTROL(pb));
1808 /* Search for SMC style EPP+ECP mode */
1809 ECR_WRITE(pb, 0x80);
1810 outb(0x04, CONTROL(pb));
1811 result = parport_EPP_supported(pb);
1813 ECR_WRITE(pb, oecr);
1816 /* Set up access functions to use ECP+EPP hardware. */
1817 pb->ops->epp_read_data = parport_pc_ecpepp_read_data;
1818 pb->ops->epp_write_data = parport_pc_ecpepp_write_data;
1819 pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr;
1820 pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr;
1826 #else /* No IEEE 1284 support */
1828 /* Don't bother probing for modes we know we won't use. */
1829 static int parport_PS2_supported(struct parport *pb) { return 0; }
1830 #ifdef CONFIG_PARPORT_PC_FIFO
1831 static int parport_ECP_supported(struct parport *pb)
1836 static int parport_EPP_supported(struct parport *pb)
1841 static int parport_ECPEPP_supported(struct parport *pb)
1846 static int parport_ECPPS2_supported(struct parport *pb)
1851 #endif /* No IEEE 1284 support */
1853 /* --- IRQ detection -------------------------------------- */
1855 /* Only if supports ECP mode */
1856 static int programmable_irq_support(struct parport *pb)
1859 unsigned char oecr = inb(ECONTROL(pb));
1860 static const int lookup[8] = {
1861 PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5
1864 ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */
1866 intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07;
1867 irq = lookup[intrLine];
1869 ECR_WRITE(pb, oecr);
1873 static int irq_probe_ECP(struct parport *pb)
1878 irqs = probe_irq_on();
1880 ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */
1881 ECR_WRITE(pb, (ECR_TST << 5) | 0x04);
1882 ECR_WRITE(pb, ECR_TST << 5);
1884 /* If Full FIFO sure that writeIntrThreshold is generated */
1885 for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++)
1886 outb(0xaa, FIFO(pb));
1888 pb->irq = probe_irq_off(irqs);
1889 ECR_WRITE(pb, ECR_SPP << 5);
1892 pb->irq = PARPORT_IRQ_NONE;
1898 * This detection seems that only works in National Semiconductors
1899 * This doesn't work in SMC, LGS, and Winbond
1901 static int irq_probe_EPP(struct parport *pb)
1903 #ifndef ADVANCED_DETECT
1904 return PARPORT_IRQ_NONE;
1909 if (pb->modes & PARPORT_MODE_PCECR)
1910 oecr = inb(ECONTROL(pb));
1912 irqs = probe_irq_on();
1914 if (pb->modes & PARPORT_MODE_PCECR)
1915 frob_econtrol(pb, 0x10, 0x10);
1917 clear_epp_timeout(pb);
1918 parport_pc_frob_control(pb, 0x20, 0x20);
1919 parport_pc_frob_control(pb, 0x10, 0x10);
1920 clear_epp_timeout(pb);
1922 /* Device isn't expecting an EPP read
1923 * and generates an IRQ.
1925 parport_pc_read_epp(pb);
1928 pb->irq = probe_irq_off(irqs);
1929 if (pb->modes & PARPORT_MODE_PCECR)
1930 ECR_WRITE(pb, oecr);
1931 parport_pc_write_control(pb, 0xc);
1934 pb->irq = PARPORT_IRQ_NONE;
1937 #endif /* Advanced detection */
1940 static int irq_probe_SPP(struct parport *pb)
1942 /* Don't even try to do this. */
1943 return PARPORT_IRQ_NONE;
1946 /* We will attempt to share interrupt requests since other devices
1947 * such as sound cards and network cards seem to like using the
1950 * When ECP is available we can autoprobe for IRQs.
1951 * NOTE: If we can autoprobe it, we can register the IRQ.
1953 static int parport_irq_probe(struct parport *pb)
1955 struct parport_pc_private *priv = pb->private_data;
1958 pb->irq = programmable_irq_support(pb);
1960 if (pb->irq == PARPORT_IRQ_NONE)
1961 pb->irq = irq_probe_ECP(pb);
1964 if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr &&
1965 (pb->modes & PARPORT_MODE_EPP))
1966 pb->irq = irq_probe_EPP(pb);
1968 clear_epp_timeout(pb);
1970 if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP))
1971 pb->irq = irq_probe_EPP(pb);
1973 clear_epp_timeout(pb);
1975 if (pb->irq == PARPORT_IRQ_NONE)
1976 pb->irq = irq_probe_SPP(pb);
1978 if (pb->irq == PARPORT_IRQ_NONE)
1979 pb->irq = get_superio_irq(pb);
1984 /* --- DMA detection -------------------------------------- */
1986 /* Only if chipset conforms to ECP ISA Interface Standard */
1987 static int programmable_dma_support(struct parport *p)
1989 unsigned char oecr = inb(ECONTROL(p));
1992 frob_set_mode(p, ECR_CNF);
1994 dma = inb(CONFIGB(p)) & 0x07;
1995 /* 000: Indicates jumpered 8-bit DMA if read-only.
1996 100: Indicates jumpered 16-bit DMA if read-only. */
1997 if ((dma & 0x03) == 0)
1998 dma = PARPORT_DMA_NONE;
2004 static int parport_dma_probe(struct parport *p)
2006 const struct parport_pc_private *priv = p->private_data;
2007 if (priv->ecr) /* ask ECP chipset first */
2008 p->dma = programmable_dma_support(p);
2009 if (p->dma == PARPORT_DMA_NONE) {
2010 /* ask known Super-IO chips proper, although these
2011 claim ECP compatible, some don't report their DMA
2012 conforming to ECP standards */
2013 p->dma = get_superio_dma(p);
2019 /* --- Initialisation code -------------------------------- */
2021 static LIST_HEAD(ports_list);
2022 static DEFINE_SPINLOCK(ports_lock);
2024 struct parport *parport_pc_probe_port(unsigned long int base,
2025 unsigned long int base_hi,
2030 struct parport_pc_private *priv;
2031 struct parport_operations *ops;
2033 int probedirq = PARPORT_IRQ_NONE;
2034 struct resource *base_res;
2035 struct resource *ECR_res = NULL;
2036 struct resource *EPP_res = NULL;
2037 struct platform_device *pdev = NULL;
2041 /* We need a physical device to attach to, but none was
2042 * provided. Create our own. */
2043 pdev = platform_device_register_simple("parport_pc",
2049 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
2051 dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
2052 dma = PARPORT_DMA_NONE;
2056 ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
2060 priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL);
2064 /* a misnomer, actually - it's allocate and reserve parport number */
2065 p = parport_register_port(base, irq, dma, ops);
2069 base_res = request_region(base, 3, p->name);
2073 memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations));
2075 priv->ctr_writable = ~0x10;
2077 priv->fifo_depth = 0;
2078 priv->dma_buf = NULL;
2079 priv->dma_handle = 0;
2080 INIT_LIST_HEAD(&priv->list);
2084 p->base_hi = base_hi;
2085 p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
2086 p->private_data = priv;
2089 ECR_res = request_region(base_hi, 3, p->name);
2091 parport_ECR_present(p);
2094 if (base != 0x3bc) {
2095 EPP_res = request_region(base+0x3, 5, p->name);
2097 if (!parport_EPP_supported(p))
2098 parport_ECPEPP_supported(p);
2100 if (!parport_SPP_supported(p))
2104 parport_ECPPS2_supported(p);
2106 parport_PS2_supported(p);
2108 p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3;
2110 printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
2111 if (p->base_hi && priv->ecr)
2112 printk(KERN_CONT " (0x%lx)", p->base_hi);
2113 if (p->irq == PARPORT_IRQ_AUTO) {
2114 p->irq = PARPORT_IRQ_NONE;
2115 parport_irq_probe(p);
2116 } else if (p->irq == PARPORT_IRQ_PROBEONLY) {
2117 p->irq = PARPORT_IRQ_NONE;
2118 parport_irq_probe(p);
2120 p->irq = PARPORT_IRQ_NONE;
2122 if (p->irq != PARPORT_IRQ_NONE) {
2123 printk(KERN_CONT ", irq %d", p->irq);
2124 priv->ctr_writable |= 0x10;
2126 if (p->dma == PARPORT_DMA_AUTO) {
2127 p->dma = PARPORT_DMA_NONE;
2128 parport_dma_probe(p);
2131 if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
2132 is mandatory (see above) */
2133 p->dma = PARPORT_DMA_NONE;
2135 #ifdef CONFIG_PARPORT_PC_FIFO
2136 if (parport_ECP_supported(p) &&
2137 p->dma != PARPORT_DMA_NOFIFO &&
2138 priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) {
2139 p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
2140 p->ops->compat_write_data = parport_pc_compat_write_block_pio;
2141 #ifdef CONFIG_PARPORT_1284
2142 p->ops->ecp_write_data = parport_pc_ecp_write_block_pio;
2143 /* currently broken, but working on it.. (FB) */
2144 /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */
2145 #endif /* IEEE 1284 support */
2146 if (p->dma != PARPORT_DMA_NONE) {
2147 printk(KERN_CONT ", dma %d", p->dma);
2148 p->modes |= PARPORT_MODE_DMA;
2150 printk(KERN_CONT ", using FIFO");
2152 /* We can't use the DMA channel after all. */
2153 p->dma = PARPORT_DMA_NONE;
2154 #endif /* Allowed to use FIFO/DMA */
2156 printk(KERN_CONT " [");
2158 #define printmode(x) \
2160 if (p->modes & PARPORT_MODE_##x) {\
2161 printk(KERN_CONT "%s%s", f ? "," : "", #x);\
2169 printmode(TRISTATE);
2176 #ifndef CONFIG_PARPORT_1284
2177 printk(KERN_CONT "(,...)");
2178 #endif /* CONFIG_PARPORT_1284 */
2179 printk(KERN_CONT "]\n");
2180 if (probedirq != PARPORT_IRQ_NONE)
2181 printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq);
2183 /* If No ECP release the ports grabbed above. */
2184 if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) {
2185 release_region(base_hi, 3);
2188 /* Likewise for EEP ports */
2189 if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) {
2190 release_region(base+3, 5);
2193 if (p->irq != PARPORT_IRQ_NONE) {
2194 if (request_irq(p->irq, parport_irq_handler,
2195 irqflags, p->name, p)) {
2196 printk(KERN_WARNING "%s: irq %d in use, "
2197 "resorting to polled operation\n",
2199 p->irq = PARPORT_IRQ_NONE;
2200 p->dma = PARPORT_DMA_NONE;
2203 #ifdef CONFIG_PARPORT_PC_FIFO
2205 if (p->dma != PARPORT_DMA_NONE) {
2206 if (request_dma(p->dma, p->name)) {
2207 printk(KERN_WARNING "%s: dma %d in use, "
2208 "resorting to PIO operation\n",
2210 p->dma = PARPORT_DMA_NONE;
2213 dma_alloc_coherent(dev,
2217 if (!priv->dma_buf) {
2218 printk(KERN_WARNING "%s: "
2219 "cannot get buffer for DMA, "
2220 "resorting to PIO operation\n",
2223 p->dma = PARPORT_DMA_NONE;
2231 /* Done probing. Now put the port into a sensible start-up state. */
2234 * Put the ECP detected port in PS2 mode.
2235 * Do this also for ports that have ECR but don't do ECP.
2239 parport_pc_write_data(p, 0);
2240 parport_pc_data_forward(p);
2242 /* Now that we've told the sharing engine about the port, and
2243 found out its characteristics, let the high-level drivers
2245 spin_lock(&ports_lock);
2246 list_add(&priv->list, &ports_list);
2247 spin_unlock(&ports_lock);
2248 parport_announce_port(p);
2254 release_region(base_hi, 3);
2256 release_region(base+0x3, 5);
2257 release_region(base, 3);
2259 parport_del_port(p);
2266 platform_device_unregister(pdev);
2269 EXPORT_SYMBOL(parport_pc_probe_port);
2271 void parport_pc_unregister_port(struct parport *p)
2273 struct parport_pc_private *priv = p->private_data;
2274 struct parport_operations *ops = p->ops;
2276 parport_remove_port(p);
2277 spin_lock(&ports_lock);
2278 list_del_init(&priv->list);
2279 spin_unlock(&ports_lock);
2280 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2281 if (p->dma != PARPORT_DMA_NONE)
2284 if (p->irq != PARPORT_IRQ_NONE)
2285 free_irq(p->irq, p);
2286 release_region(p->base, 3);
2288 release_region(p->base + 3, p->size - 3);
2289 if (p->modes & PARPORT_MODE_ECP)
2290 release_region(p->base_hi, 3);
2291 #if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA)
2293 dma_free_coherent(p->physport->dev, PAGE_SIZE,
2297 kfree(p->private_data);
2298 parport_del_port(p);
2299 kfree(ops); /* hope no-one cached it */
2301 EXPORT_SYMBOL(parport_pc_unregister_port);
2305 /* ITE support maintained by Rich Liu <richliu@poorman.org> */
2306 static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma,
2307 const struct parport_pc_via_data *via)
2309 short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 };
2311 u32 ite8872_lpt, ite8872_lpthi;
2312 u8 ite8872_irq, type;
2316 DPRINTK(KERN_DEBUG "sio_ite_8872_probe()\n");
2318 /* make sure which one chip */
2319 for (i = 0; i < 5; i++) {
2320 if (request_region(inta_addr[i], 32, "it887x")) {
2322 pci_write_config_dword(pdev, 0x60,
2323 0xe5000000 | inta_addr[i]);
2324 pci_write_config_dword(pdev, 0x78,
2325 0x00000000 | inta_addr[i]);
2326 test = inb(inta_addr[i]);
2329 release_region(inta_addr[i], 32);
2333 printk(KERN_INFO "parport_pc: cannot find ITE8872 INTA\n");
2337 type = inb(inta_addr[i] + 0x18);
2342 printk(KERN_INFO "parport_pc: ITE8871 found (1P)\n");
2343 ite8872set = 0x64200000;
2346 printk(KERN_INFO "parport_pc: ITE8875 found (1P)\n");
2347 ite8872set = 0x64200000;
2350 printk(KERN_INFO "parport_pc: ITE8872 found (2S1P)\n");
2351 ite8872set = 0x64e00000;
2354 printk(KERN_INFO "parport_pc: ITE8873 found (1S)\n");
2355 release_region(inta_addr[i], 32);
2358 printk(KERN_INFO "parport_pc: ITE8874 found (2S)\n");
2359 release_region(inta_addr[i], 32);
2362 printk(KERN_INFO "parport_pc: unknown ITE887x\n");
2363 printk(KERN_INFO "parport_pc: please mail 'lspci -nvv' "
2364 "output to Rich.Liu@ite.com.tw\n");
2365 release_region(inta_addr[i], 32);
2369 pci_read_config_byte(pdev, 0x3c, &ite8872_irq);
2370 pci_read_config_dword(pdev, 0x1c, &ite8872_lpt);
2371 ite8872_lpt &= 0x0000ff00;
2372 pci_read_config_dword(pdev, 0x20, &ite8872_lpthi);
2373 ite8872_lpthi &= 0x0000ff00;
2374 pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt);
2375 pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi);
2376 pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt);
2377 /* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */
2378 /* SET Parallel IRQ */
2379 pci_write_config_dword(pdev, 0x9c,
2380 ite8872set | (ite8872_irq * 0x11111));
2382 DPRINTK(KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq);
2383 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n",
2385 DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n",
2388 /* Let the user (or defaults) steer us away from interrupts */
2390 if (autoirq != PARPORT_IRQ_AUTO)
2391 irq = PARPORT_IRQ_NONE;
2394 * Release the resource so that parport_pc_probe_port can get it.
2396 release_region(inta_addr[i], 32);
2397 if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi,
2398 irq, PARPORT_DMA_NONE, &pdev->dev, 0)) {
2400 "parport_pc: ITE 8872 parallel port: io=0x%X",
2402 if (irq != PARPORT_IRQ_NONE)
2403 pr_cont(", irq=%d", irq);
2411 /* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru>
2412 based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */
2413 static int parport_init_mode;
2415 /* Data for two known VIA chips */
2416 static struct parport_pc_via_data via_686a_data = {
2425 static struct parport_pc_via_data via_8231_data = {
2435 static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma,
2436 const struct parport_pc_via_data *via)
2438 u8 tmp, tmp2, siofunc;
2441 unsigned port1, port2;
2442 unsigned have_epp = 0;
2444 printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n");
2446 switch (parport_init_mode) {
2448 printk(KERN_DEBUG "parport_pc: setting SPP mode\n");
2449 siofunc = VIA_FUNCTION_PARPORT_SPP;
2452 printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n");
2453 siofunc = VIA_FUNCTION_PARPORT_SPP;
2454 ppcontrol = VIA_PARPORT_BIDIR;
2457 printk(KERN_DEBUG "parport_pc: setting EPP mode\n");
2458 siofunc = VIA_FUNCTION_PARPORT_EPP;
2459 ppcontrol = VIA_PARPORT_BIDIR;
2463 printk(KERN_DEBUG "parport_pc: setting ECP mode\n");
2464 siofunc = VIA_FUNCTION_PARPORT_ECP;
2465 ppcontrol = VIA_PARPORT_BIDIR;
2468 printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n");
2469 siofunc = VIA_FUNCTION_PARPORT_ECP;
2470 ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP;
2475 "parport_pc: probing current configuration\n");
2476 siofunc = VIA_FUNCTION_PROBE;
2480 * unlock super i/o configuration
2482 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2483 tmp |= via->via_pci_superio_config_data;
2484 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2486 /* Bits 1-0: Parallel Port Mode / Enable */
2487 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2488 tmp = inb(VIA_CONFIG_DATA);
2489 /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */
2490 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2491 tmp2 = inb(VIA_CONFIG_DATA);
2492 if (siofunc == VIA_FUNCTION_PROBE) {
2493 siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE;
2496 tmp &= ~VIA_FUNCTION_PARPORT_DISABLE;
2498 outb(via->viacfg_function, VIA_CONFIG_INDEX);
2499 outb(tmp, VIA_CONFIG_DATA);
2500 tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP);
2502 outb(via->viacfg_parport_control, VIA_CONFIG_INDEX);
2503 outb(tmp2, VIA_CONFIG_DATA);
2506 /* Parallel Port I/O Base Address, bits 9-2 */
2507 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2508 port1 = inb(VIA_CONFIG_DATA) << 2;
2510 printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n",
2512 if (port1 == 0x3BC && have_epp) {
2513 outb(via->viacfg_parport_base, VIA_CONFIG_INDEX);
2514 outb((0x378 >> 2), VIA_CONFIG_DATA);
2516 "parport_pc: Parallel port base changed to 0x378\n");
2521 * lock super i/o configuration
2523 pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp);
2524 tmp &= ~via->via_pci_superio_config_data;
2525 pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp);
2527 if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) {
2528 printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n");
2532 /* Bits 7-4: PnP Routing for Parallel Port IRQ */
2533 pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp);
2534 irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4);
2536 if (siofunc == VIA_FUNCTION_PARPORT_ECP) {
2537 /* Bits 3-2: PnP Routing for Parallel Port DMA */
2538 pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp);
2539 dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2);
2541 /* if ECP not enabled, DMA is not enabled, assumed
2542 bogus 'dma' value */
2543 dma = PARPORT_DMA_NONE;
2545 /* Let the user (or defaults) steer us away from interrupts and DMA */
2546 if (autoirq == PARPORT_IRQ_NONE) {
2547 irq = PARPORT_IRQ_NONE;
2548 dma = PARPORT_DMA_NONE;
2550 if (autodma == PARPORT_DMA_NONE)
2551 dma = PARPORT_DMA_NONE;
2555 port2 = 0x7bc; break;
2557 port2 = 0x778; break;
2559 port2 = 0x678; break;
2562 "parport_pc: Weird VIA parport base 0x%X, ignoring\n",
2567 /* filter bogus IRQs */
2573 irq = PARPORT_IRQ_NONE;
2576 default: /* do nothing */
2580 /* finally, do the probe with values obtained */
2581 if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) {
2583 "parport_pc: VIA parallel port: io=0x%X", port1);
2584 if (irq != PARPORT_IRQ_NONE)
2585 pr_cont(", irq=%d", irq);
2586 if (dma != PARPORT_DMA_NONE)
2587 pr_cont(", dma=%d", dma);
2592 printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n",
2598 enum parport_pc_sio_types {
2599 sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */
2600 sio_via_8231, /* Via VT8231 south bridge integrated Super IO */
2605 /* each element directly indexed from enum list, above */
2606 static struct parport_pc_superio {
2607 int (*probe) (struct pci_dev *pdev, int autoirq, int autodma,
2608 const struct parport_pc_via_data *via);
2609 const struct parport_pc_via_data *via;
2610 } parport_pc_superio_info[] = {
2611 { sio_via_probe, &via_686a_data, },
2612 { sio_via_probe, &via_8231_data, },
2613 { sio_ite_8872_probe, NULL, },
2616 enum parport_pc_pci_cards {
2617 siig_1p_10x = last_sio,
2622 lava_parallel_dual_a,
2623 lava_parallel_dual_b,
2654 /* each element directly indexed from enum list, above
2655 * (but offset by last_sio) */
2656 static struct parport_pc_pci {
2658 struct { /* BAR (base address registers) numbers in the config
2662 /* -1 if not there, >6 for offset-method (max BAR is 6) */
2665 /* If set, this is called immediately after pci_enable_device.
2666 * If it returns non-zero, no probing will take place and the
2667 * ports will not be used. */
2668 int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);
2670 /* If set, this is called after probing for ports. If 'failed'
2671 * is non-zero we couldn't use any of the ports. */
2672 void (*postinit_hook) (struct pci_dev *pdev, int failed);
2674 /* siig_1p_10x */ { 1, { { 2, 3 }, } },
2675 /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } },
2676 /* siig_1p_20x */ { 1, { { 0, 1 }, } },
2677 /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } },
2678 /* lava_parallel */ { 1, { { 0, -1 }, } },
2679 /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } },
2680 /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } },
2681 /* boca_ioppar */ { 1, { { 0, -1 }, } },
2682 /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } },
2683 /* timedia_4006a */ { 1, { { 0, -1 }, } },
2684 /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } },
2685 /* timedia_4008a */ { 1, { { 0, 1 }, } },
2686 /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2687 /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } },
2688 /* SYBA uses fixed offsets in
2690 /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } },
2691 /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } },
2692 /* titan_010l */ { 1, { { 3, -1 }, } },
2693 /* avlab_1p */ { 1, { { 0, 1}, } },
2694 /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} },
2695 /* The Oxford Semi cards are unusual: 954 doesn't support ECP,
2696 * and 840 locks up if you write 1 to bit 2! */
2697 /* oxsemi_952 */ { 1, { { 0, 1 }, } },
2698 /* oxsemi_954 */ { 1, { { 0, -1 }, } },
2699 /* oxsemi_840 */ { 1, { { 0, 1 }, } },
2700 /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, } },
2701 /* aks_0100 */ { 1, { { 0, -1 }, } },
2702 /* mobility_pp */ { 1, { { 0, 1 }, } },
2704 /* The netmos entries below are untested */
2705 /* netmos_9705 */ { 1, { { 0, -1 }, } },
2706 /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} },
2707 /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} },
2708 /* netmos_9805 */ { 1, { { 0, 1 }, } },
2709 /* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } },
2710 /* netmos_9901 */ { 1, { { 0, -1 }, } },
2711 /* netmos_9865 */ { 1, { { 0, -1 }, } },
2712 /* quatech_sppxp100 */ { 1, { { 0, 1 }, } },
2713 /* wch_ch382l */ { 1, { { 2, -1 }, } },
2716 static const struct pci_device_id parport_pc_pci_tbl[] = {
2717 /* Super-IO onboard chips */
2718 { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a },
2719 { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 },
2720 { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
2721 PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 },
2724 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x,
2725 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x },
2726 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x,
2727 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x },
2728 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x,
2729 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x },
2730 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x,
2731 PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x },
2732 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL,
2733 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel },
2734 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A,
2735 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a },
2736 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B,
2737 PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b },
2738 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR,
2739 PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar },
2740 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
2741 PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 },
2742 /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/
2743 { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a },
2744 { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 },
2745 { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a },
2746 { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 },
2747 { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a },
2748 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP,
2749 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp },
2750 { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP,
2751 PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp },
2752 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L,
2753 PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l },
2754 /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/
2755 /* AFAVLAB_TK9902 */
2756 { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p},
2757 { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p},
2758 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP,
2759 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 },
2760 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP,
2761 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 },
2762 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840,
2763 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 },
2764 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840,
2765 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2766 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G,
2767 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2768 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0,
2769 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2770 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G,
2771 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2772 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1,
2773 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2774 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G,
2775 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2776 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U,
2777 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2778 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU,
2779 PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport },
2780 { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD,
2781 PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 },
2782 { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp },
2783 /* NetMos communication controllers */
2784 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705,
2785 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 },
2786 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715,
2787 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 },
2788 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755,
2789 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 },
2790 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805,
2791 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 },
2792 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815,
2793 PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 },
2794 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901,
2795 0xA000, 0x2000, 0, 0, netmos_9901 },
2796 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2797 0xA000, 0x1000, 0, 0, netmos_9865 },
2798 { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865,
2799 0xA000, 0x2000, 0, 0, netmos_9865 },
2800 /* Quatech SPPXP-100 Parallel port PCI ExpressCard */
2801 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100,
2802 PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 },
2803 /* WCH CH382L PCI-E single parallel port card */
2804 { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l },
2805 { 0, } /* terminate list */
2807 MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl);
2809 struct pci_parport_data {
2811 struct parport *ports[2];
2814 static int parport_pc_pci_probe(struct pci_dev *dev,
2815 const struct pci_device_id *id)
2817 int err, count, n, i = id->driver_data;
2818 struct pci_parport_data *data;
2821 /* This is an onboard Super-IO and has already been probed */
2824 /* This is a PCI card */
2827 err = pci_enable_device(dev);
2831 data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL);
2835 if (cards[i].preinit_hook &&
2836 cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) {
2841 for (n = 0; n < cards[i].numports; n++) {
2842 int lo = cards[i].addr[n].lo;
2843 int hi = cards[i].addr[n].hi;
2845 unsigned long io_lo, io_hi;
2846 io_lo = pci_resource_start(dev, lo);
2848 if ((hi >= 0) && (hi <= 6))
2849 io_hi = pci_resource_start(dev, hi);
2851 io_lo += hi; /* Reinterpret the meaning of
2852 "hi" as an offset (see SYBA
2854 /* TODO: test if sharing interrupts works */
2856 if (irq == IRQ_NONE) {
2858 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n",
2859 id->vendor, id->device, io_lo, io_hi);
2860 irq = PARPORT_IRQ_NONE;
2863 "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n",
2864 id->vendor, id->device, io_lo, io_hi, irq);
2866 data->ports[count] =
2867 parport_pc_probe_port(io_lo, io_hi, irq,
2868 PARPORT_DMA_NONE, &dev->dev,
2870 if (data->ports[count])
2876 if (cards[i].postinit_hook)
2877 cards[i].postinit_hook(dev, count == 0);
2880 pci_set_drvdata(dev, data);
2889 static void parport_pc_pci_remove(struct pci_dev *dev)
2891 struct pci_parport_data *data = pci_get_drvdata(dev);
2895 for (i = data->num - 1; i >= 0; i--)
2896 parport_pc_unregister_port(data->ports[i]);
2902 static struct pci_driver parport_pc_pci_driver = {
2903 .name = "parport_pc",
2904 .id_table = parport_pc_pci_tbl,
2905 .probe = parport_pc_pci_probe,
2906 .remove = parport_pc_pci_remove,
2909 static int __init parport_pc_init_superio(int autoirq, int autodma)
2911 const struct pci_device_id *id;
2912 struct pci_dev *pdev = NULL;
2915 for_each_pci_dev(pdev) {
2916 id = pci_match_id(parport_pc_pci_tbl, pdev);
2917 if (id == NULL || id->driver_data >= last_sio)
2920 if (parport_pc_superio_info[id->driver_data].probe(
2921 pdev, autoirq, autodma,
2922 parport_pc_superio_info[id->driver_data].via)) {
2927 return ret; /* number of devices found */
2930 static struct pci_driver parport_pc_pci_driver;
2931 static int __init parport_pc_init_superio(int autoirq, int autodma)
2935 #endif /* CONFIG_PCI */
2939 static const struct pnp_device_id parport_pc_pnp_tbl[] = {
2940 /* Standard LPT Printer Port */
2941 {.id = "PNP0400", .driver_data = 0},
2942 /* ECP Printer Port */
2943 {.id = "PNP0401", .driver_data = 0},
2947 MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl);
2949 static int parport_pc_pnp_probe(struct pnp_dev *dev,
2950 const struct pnp_device_id *id)
2952 struct parport *pdata;
2953 unsigned long io_lo, io_hi;
2956 if (pnp_port_valid(dev, 0) &&
2957 !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
2958 io_lo = pnp_port_start(dev, 0);
2962 if (pnp_port_valid(dev, 1) &&
2963 !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) {
2964 io_hi = pnp_port_start(dev, 1);
2968 if (pnp_irq_valid(dev, 0) &&
2969 !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) {
2970 irq = pnp_irq(dev, 0);
2972 irq = PARPORT_IRQ_NONE;
2974 if (pnp_dma_valid(dev, 0) &&
2975 !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) {
2976 dma = pnp_dma(dev, 0);
2978 dma = PARPORT_DMA_NONE;
2980 dev_info(&dev->dev, "reported by %s\n", dev->protocol->name);
2981 pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0);
2985 pnp_set_drvdata(dev, pdata);
2989 static void parport_pc_pnp_remove(struct pnp_dev *dev)
2991 struct parport *pdata = (struct parport *)pnp_get_drvdata(dev);
2995 parport_pc_unregister_port(pdata);
2998 /* we only need the pnp layer to activate the device, at least for now */
2999 static struct pnp_driver parport_pc_pnp_driver = {
3000 .name = "parport_pc",
3001 .id_table = parport_pc_pnp_tbl,
3002 .probe = parport_pc_pnp_probe,
3003 .remove = parport_pc_pnp_remove,
3007 static struct pnp_driver parport_pc_pnp_driver;
3008 #endif /* CONFIG_PNP */
3010 static int parport_pc_platform_probe(struct platform_device *pdev)
3012 /* Always succeed, the actual probing is done in
3013 * parport_pc_probe_port(). */
3017 static struct platform_driver parport_pc_platform_driver = {
3019 .name = "parport_pc",
3021 .probe = parport_pc_platform_probe,
3024 /* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
3025 static int __attribute__((unused))
3026 parport_pc_find_isa_ports(int autoirq, int autodma)
3030 if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0))
3032 if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0))
3034 if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0))
3040 /* This function is called by parport_pc_init if the user didn't
3041 * specify any ports to probe. Its job is to find some ports. Order
3042 * is important here -- we want ISA ports to be registered first,
3043 * followed by PCI cards (for least surprise), but before that we want
3044 * to do chipset-specific tests for some onboard ports that we know
3047 * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY
3048 * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO
3050 static void __init parport_pc_find_ports(int autoirq, int autodma)
3054 #ifdef CONFIG_PARPORT_PC_SUPERIO
3055 detect_and_report_it87();
3056 detect_and_report_winbond();
3057 detect_and_report_smsc();
3060 /* Onboard SuperIO chipsets that show themselves on the PCI bus. */
3061 count += parport_pc_init_superio(autoirq, autodma);
3063 /* PnP ports, skip detection if SuperIO already found them */
3065 err = pnp_register_driver(&parport_pc_pnp_driver);
3067 pnp_registered_parport = 1;
3070 /* ISA ports and whatever (see asm/parport.h). */
3071 parport_pc_find_nonpci_ports(autoirq, autodma);
3073 err = pci_register_driver(&parport_pc_pci_driver);
3075 pci_registered_parport = 1;
3079 * Piles of crap below pretend to be a parser for module and kernel
3080 * parameters. Say "thank you" to whoever had come up with that
3081 * syntax and keep in mind that code below is a cleaned up version.
3084 static int __initdata io[PARPORT_PC_MAX_PORTS+1] = {
3085 [0 ... PARPORT_PC_MAX_PORTS] = 0
3087 static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = {
3088 [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO
3090 static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = {
3091 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE
3093 static int __initdata irqval[PARPORT_PC_MAX_PORTS] = {
3094 [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY
3097 static int __init parport_parse_param(const char *s, int *val,
3098 int automatic, int none, int nofifo)
3102 if (!strncmp(s, "auto", 4))
3104 else if (!strncmp(s, "none", 4))
3106 else if (nofifo && !strncmp(s, "nofifo", 6))
3110 unsigned long r = simple_strtoul(s, &ep, 0);
3114 printk(KERN_ERR "parport: bad specifier `%s'\n", s);
3121 static int __init parport_parse_irq(const char *irqstr, int *val)
3123 return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO,
3124 PARPORT_IRQ_NONE, 0);
3127 static int __init parport_parse_dma(const char *dmastr, int *val)
3129 return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO,
3130 PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO);
3134 static int __init parport_init_mode_setup(char *str)
3137 "parport_pc.c: Specified parameter parport_init_mode=%s\n", str);
3139 if (!strcmp(str, "spp"))
3140 parport_init_mode = 1;
3141 if (!strcmp(str, "ps2"))
3142 parport_init_mode = 2;
3143 if (!strcmp(str, "epp"))
3144 parport_init_mode = 3;
3145 if (!strcmp(str, "ecp"))
3146 parport_init_mode = 4;
3147 if (!strcmp(str, "ecpepp"))
3148 parport_init_mode = 5;
3154 static char *irq[PARPORT_PC_MAX_PORTS];
3155 static char *dma[PARPORT_PC_MAX_PORTS];
3157 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
3158 module_param_hw_array(io, int, ioport, NULL, 0);
3159 MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)");
3160 module_param_hw_array(io_hi, int, ioport, NULL, 0);
3161 MODULE_PARM_DESC(irq, "IRQ line");
3162 module_param_hw_array(irq, charp, irq, NULL, 0);
3163 MODULE_PARM_DESC(dma, "DMA channel");
3164 module_param_hw_array(dma, charp, dma, NULL, 0);
3165 #if defined(CONFIG_PARPORT_PC_SUPERIO) || \
3166 (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO))
3167 MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation");
3168 module_param(verbose_probing, int, 0644);
3171 static char *init_mode;
3172 MODULE_PARM_DESC(init_mode,
3173 "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)");
3174 module_param(init_mode, charp, 0);
3177 static int __init parse_parport_params(void)
3184 parport_init_mode_setup(init_mode);
3187 for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) {
3188 if (parport_parse_irq(irq[i], &val))
3191 if (parport_parse_dma(dma[i], &val))
3196 /* The user can make us use any IRQs or DMAs we find. */
3197 if (irq[0] && !parport_parse_irq(irq[0], &val))
3199 case PARPORT_IRQ_NONE:
3200 case PARPORT_IRQ_AUTO:
3205 "parport_pc: irq specified "
3206 "without base address. Use 'io=' "
3207 "to specify one\n");
3210 if (dma[0] && !parport_parse_dma(dma[0], &val))
3212 case PARPORT_DMA_NONE:
3213 case PARPORT_DMA_AUTO:
3218 "parport_pc: dma specified "
3219 "without base address. Use 'io=' "
3220 "to specify one\n");
3228 static int parport_setup_ptr __initdata;
3231 * Acceptable parameters:
3235 * parport=0xBASE[,IRQ[,DMA]]
3237 * IRQ/DMA may be numeric or 'auto' or 'none'
3239 static int __init parport_setup(char *str)
3245 if (!str || !*str || (*str == '0' && !*(str+1))) {
3246 /* Disable parport if "parport=0" in cmdline */
3247 io[0] = PARPORT_DISABLE;
3251 if (!strncmp(str, "auto", 4)) {
3252 irqval[0] = PARPORT_IRQ_AUTO;
3253 dmaval[0] = PARPORT_DMA_AUTO;
3257 val = simple_strtoul(str, &endptr, 0);
3258 if (endptr == str) {
3259 printk(KERN_WARNING "parport=%s not understood\n", str);
3263 if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) {
3264 printk(KERN_ERR "parport=%s ignored, too many ports\n", str);
3268 io[parport_setup_ptr] = val;
3269 irqval[parport_setup_ptr] = PARPORT_IRQ_NONE;
3270 dmaval[parport_setup_ptr] = PARPORT_DMA_NONE;
3272 sep = strchr(str, ',');
3274 if (parport_parse_irq(sep, &val))
3276 irqval[parport_setup_ptr] = val;
3277 sep = strchr(sep, ',');
3279 if (parport_parse_dma(sep, &val))
3281 dmaval[parport_setup_ptr] = val;
3284 parport_setup_ptr++;
3288 static int __init parse_parport_params(void)
3290 return io[0] == PARPORT_DISABLE;
3293 __setup("parport=", parport_setup);
3296 * Acceptable parameters:
3298 * parport_init_mode=[spp|ps2|epp|ecp|ecpepp]
3301 __setup("parport_init_mode=", parport_init_mode_setup);
3305 /* "Parser" ends here */
3307 static int __init parport_pc_init(void)
3311 if (parse_parport_params())
3314 err = platform_driver_register(&parport_pc_platform_driver);
3320 /* Only probe the ports we were given. */
3322 for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) {
3325 if (io_hi[i] == PARPORT_IOHI_AUTO)
3326 io_hi[i] = 0x400 + io[i];
3327 parport_pc_probe_port(io[i], io_hi[i],
3328 irqval[i], dmaval[i], NULL, 0);
3331 parport_pc_find_ports(irqval[0], dmaval[0]);
3336 static void __exit parport_pc_exit(void)
3338 if (pci_registered_parport)
3339 pci_unregister_driver(&parport_pc_pci_driver);
3340 if (pnp_registered_parport)
3341 pnp_unregister_driver(&parport_pc_pnp_driver);
3342 platform_driver_unregister(&parport_pc_platform_driver);
3344 while (!list_empty(&ports_list)) {
3345 struct parport_pc_private *priv;
3346 struct parport *port;
3348 priv = list_entry(ports_list.next,
3349 struct parport_pc_private, list);
3352 parport_pc_unregister_port(port);
3353 if (dev && dev->bus == &platform_bus_type)
3354 platform_device_unregister(to_platform_device(dev));
3358 MODULE_AUTHOR("Phil Blundell, Tim Waugh, others");
3359 MODULE_DESCRIPTION("PC-style parallel port driver");
3360 MODULE_LICENSE("GPL");
3361 module_init(parport_pc_init)
3362 module_exit(parport_pc_exit)