2 * pata-legacy.c - Legacy port PATA/SATA controller driver.
3 * Copyright 2005/2006 Red Hat <alan@redhat.com>, all rights reserved.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; see the file COPYING. If not, write to
17 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 * An ATA driver for the legacy ATA ports.
22 * Opti 82C465/82C611 support: Data sheets at opti-inc.com
24 * Promise 20230/20620:
25 * http://www.ryston.cz/petr/vlb/pdc20230b.html
26 * http://www.ryston.cz/petr/vlb/pdc20230c.html
27 * http://www.ryston.cz/petr/vlb/pdc20630.html
29 * Unsupported but docs exist:
30 * Appian/Adaptec AIC25VL01/Cirrus Logic PD7220
32 * This driver handles legacy (that is "ISA/VLB side") IDE ports found
33 * on PC class systems. There are three hybrid devices that are exceptions
34 * The Cyrix 5510/5520 where a pre SFF ATA device is on the bridge and
35 * the MPIIX where the tuning is PCI side but the IDE is "ISA side".
37 * Specific support is included for the ht6560a/ht6560b/opti82c611a/
38 * opti82c465mv/promise 20230c/20630/winbond83759A
40 * Use the autospeed and pio_mask options with:
41 * Appian ADI/2 aka CLPD7220 or AIC25VL01.
42 * Use the jumpers, autospeed and set pio_mask to the mode on the jumpers with
43 * Goldstar GM82C711, PIC-1288A-125, UMC 82C871F, Winbond W83759,
44 * Winbond W83759A, Promise PDC20230-B
46 * For now use autospeed and pio_mask as above with the W83759A. This may
51 #include <linux/kernel.h>
52 #include <linux/module.h>
53 #include <linux/pci.h>
54 #include <linux/init.h>
55 #include <linux/blkdev.h>
56 #include <linux/delay.h>
57 #include <scsi/scsi_host.h>
58 #include <linux/ata.h>
59 #include <linux/libata.h>
60 #include <linux/platform_device.h>
62 #define DRV_NAME "pata_legacy"
63 #define DRV_VERSION "0.6.5"
68 module_param(all, int, 0444);
69 MODULE_PARM_DESC(all, "Grab all legacy port devices, even if PCI(0=off, 1=on)");
76 struct platform_device *platform_dev;
90 QDI6580DP = 9, /* Dual channel mode is different */
102 enum controller type;
103 unsigned long private;
106 struct legacy_controller {
108 struct ata_port_operations *ops;
109 unsigned int pio_mask;
111 int (*setup)(struct platform_device *, struct legacy_probe *probe,
112 struct legacy_data *data);
115 static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
117 static struct legacy_probe probe_list[NR_HOST];
118 static struct legacy_data legacy_data[NR_HOST];
119 static struct ata_host *legacy_host[NR_HOST];
120 static int nr_legacy_host;
123 static int probe_all; /* Set to check all ISA port ranges */
124 static int ht6560a; /* HT 6560A on primary 1, second 2, both 3 */
125 static int ht6560b; /* HT 6560A on primary 1, second 2, both 3 */
126 static int opti82c611a; /* Opti82c611A on primary 1, sec 2, both 3 */
127 static int opti82c46x; /* Opti 82c465MV present(pri/sec autodetect) */
128 static int qdi; /* Set to probe QDI controllers */
129 static int winbond; /* Set to probe Winbond controllers,
130 give I/O port if non standard */
131 static int autospeed; /* Chip present which snoops speed changes */
132 static int pio_mask = 0x1F; /* PIO range for autospeed devices */
133 static int iordy_mask = 0xFFFFFFFF; /* Use iordy if available */
136 * legacy_probe_add - Add interface to probe list
137 * @port: Controller port
139 * @type: Controller type
140 * @private: Controller specific info
142 * Add an entry into the probe list for ATA controllers. This is used
143 * to add the default ISA slots and then to build up the table
144 * further according to other ISA/VLB/Weird device scans
146 * An I/O port list is used to keep ordering stable and sane, as we
147 * don't have any good way to talk about ordering otherwise
150 static int legacy_probe_add(unsigned long port, unsigned int irq,
151 enum controller type, unsigned long private)
153 struct legacy_probe *lp = &probe_list[0];
155 struct legacy_probe *free = NULL;
157 for (i = 0; i < NR_HOST; i++) {
158 if (lp->port == 0 && free == NULL)
160 /* Matching port, or the correct slot for ordering */
161 if (lp->port == port || legacy_port[i] == port) {
168 printk(KERN_ERR "pata_legacy: Too many interfaces.\n");
171 /* Fill in the entry for later probing */
175 free->private = private;
181 * legacy_set_mode - mode setting
183 * @unused: Device that failed when error is returned
185 * Use a non standard set_mode function. We don't want to be tuned.
187 * The BIOS configured everything. Our job is not to fiddle. Just use
188 * whatever PIO the hardware is using and leave it at that. When we
189 * get some kind of nice user driven API for control then we can
190 * expand on this as per hdparm in the base kernel.
193 static int legacy_set_mode(struct ata_link *link, struct ata_device **unused)
195 struct ata_device *dev;
197 ata_link_for_each_dev(dev, link) {
198 if (ata_dev_enabled(dev)) {
199 ata_dev_printk(dev, KERN_INFO,
200 "configured for PIO\n");
201 dev->pio_mode = XFER_PIO_0;
202 dev->xfer_mode = XFER_PIO_0;
203 dev->xfer_shift = ATA_SHIFT_PIO;
204 dev->flags |= ATA_DFLAG_PIO;
210 static struct scsi_host_template legacy_sht = {
211 ATA_PIO_SHT(DRV_NAME),
214 static const struct ata_port_operations legacy_base_port_ops = {
215 .inherits = &ata_sff_port_ops,
216 .cable_detect = ata_cable_40wire,
220 * These ops are used if the user indicates the hardware
221 * snoops the commands to decide on the mode and handles the
222 * mode selection "magically" itself. Several legacy controllers
223 * do this. The mode range can be set if it is not 0x1F by setting
227 static struct ata_port_operations simple_port_ops = {
228 .inherits = &legacy_base_port_ops,
229 .sff_data_xfer = ata_sff_data_xfer_noirq,
232 static struct ata_port_operations legacy_port_ops = {
233 .inherits = &legacy_base_port_ops,
234 .sff_data_xfer = ata_sff_data_xfer_noirq,
235 .set_mode = legacy_set_mode,
239 * Promise 20230C and 20620 support
241 * This controller supports PIO0 to PIO2. We set PIO timings
242 * conservatively to allow for 50MHz Vesa Local Bus. The 20620 DMA
243 * support is weird being DMA to controller and PIO'd to the host
247 static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
250 int pio = adev->pio_mode - XFER_PIO_0;
254 /* Safe as UP only. Force I/Os to occur together */
256 local_irq_save(flags);
258 /* Unlock the control interface */
261 outb(inb(0x1F2) | 0x80, 0x1F2);
268 while ((inb(0x1F2) & 0x80) && --tries);
270 local_irq_restore(flags);
272 outb(inb(0x1F4) & 0x07, 0x1F4);
275 rt &= 0x07 << (3 * adev->devno);
277 rt |= (1 + 3 * pio) << (3 * adev->devno);
280 outb(inb(0x1F2) | 0x01, 0x1F2);
286 static unsigned int pdc_data_xfer_vlb(struct ata_device *dev,
287 unsigned char *buf, unsigned int buflen, int rw)
289 if (ata_id_has_dword_io(dev->id)) {
290 struct ata_port *ap = dev->link->ap;
291 int slop = buflen & 3;
294 local_irq_save(flags);
296 /* Perform the 32bit I/O synchronization sequence */
297 ioread8(ap->ioaddr.nsect_addr);
298 ioread8(ap->ioaddr.nsect_addr);
299 ioread8(ap->ioaddr.nsect_addr);
303 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
305 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
307 if (unlikely(slop)) {
310 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
311 memcpy(buf + buflen - slop, &pad, slop);
313 memcpy(&pad, buf + buflen - slop, slop);
314 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
318 local_irq_restore(flags);
320 buflen = ata_sff_data_xfer_noirq(dev, buf, buflen, rw);
325 static struct ata_port_operations pdc20230_port_ops = {
326 .inherits = &legacy_base_port_ops,
327 .set_piomode = pdc20230_set_piomode,
328 .sff_data_xfer = pdc_data_xfer_vlb,
332 * Holtek 6560A support
334 * This controller supports PIO0 to PIO2 (no IORDY even though higher
335 * timings can be loaded).
338 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
343 /* Get the timing data in cycles. For now play safe at 50Mhz */
344 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
346 active = clamp_val(t.active, 2, 15);
347 recover = clamp_val(t.recover, 4, 15);
354 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
355 ioread8(ap->ioaddr.status_addr);
358 static struct ata_port_operations ht6560a_port_ops = {
359 .inherits = &legacy_base_port_ops,
360 .set_piomode = ht6560a_set_piomode,
364 * Holtek 6560B support
366 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO
367 * setting unless we see an ATAPI device in which case we force it off.
369 * FIXME: need to implement 2nd channel support.
372 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
377 /* Get the timing data in cycles. For now play safe at 50Mhz */
378 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
380 active = clamp_val(t.active, 2, 15);
381 recover = clamp_val(t.recover, 2, 16);
389 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
391 if (adev->class != ATA_DEV_ATA) {
392 u8 rconf = inb(0x3E6);
398 ioread8(ap->ioaddr.status_addr);
401 static struct ata_port_operations ht6560b_port_ops = {
402 .inherits = &legacy_base_port_ops,
403 .set_piomode = ht6560b_set_piomode,
407 * Opti core chipset helpers
411 * opti_syscfg - read OPTI chipset configuration
412 * @reg: Configuration register to read
414 * Returns the value of an OPTI system board configuration register.
417 static u8 opti_syscfg(u8 reg)
422 /* Uniprocessor chipset and must force cycles adjancent */
423 local_irq_save(flags);
426 local_irq_restore(flags);
433 * This controller supports PIO0 to PIO3.
436 static void opti82c611a_set_piomode(struct ata_port *ap,
437 struct ata_device *adev)
439 u8 active, recover, setup;
441 struct ata_device *pair = ata_dev_pair(adev);
443 int khz[4] = { 50000, 40000, 33000, 25000 };
446 /* Enter configuration mode */
447 ioread16(ap->ioaddr.error_addr);
448 ioread16(ap->ioaddr.error_addr);
449 iowrite8(3, ap->ioaddr.nsect_addr);
451 /* Read VLB clock strapping */
452 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
454 /* Get the timing data in cycles */
455 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
457 /* Setup timing is shared */
459 struct ata_timing tp;
460 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
462 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
465 active = clamp_val(t.active, 2, 17) - 2;
466 recover = clamp_val(t.recover, 1, 16) - 1;
467 setup = clamp_val(t.setup, 1, 4) - 1;
469 /* Select the right timing bank for write timing */
470 rc = ioread8(ap->ioaddr.lbal_addr);
472 rc |= (adev->devno << 7);
473 iowrite8(rc, ap->ioaddr.lbal_addr);
475 /* Write the timings */
476 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
478 /* Select the right bank for read timings, also
479 load the shared timings for address */
480 rc = ioread8(ap->ioaddr.device_addr);
482 rc |= adev->devno; /* Index select */
483 rc |= (setup << 4) | 0x04;
484 iowrite8(rc, ap->ioaddr.device_addr);
486 /* Load the read timings */
487 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
489 /* Ensure the timing register mode is right */
490 rc = ioread8(ap->ioaddr.lbal_addr);
493 iowrite8(rc, ap->ioaddr.lbal_addr);
495 /* Exit command mode */
496 iowrite8(0x83, ap->ioaddr.nsect_addr);
500 static struct ata_port_operations opti82c611a_port_ops = {
501 .inherits = &legacy_base_port_ops,
502 .set_piomode = opti82c611a_set_piomode,
508 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
509 * version is dual channel but doesn't have a lot of unique registers.
512 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
514 u8 active, recover, setup;
516 struct ata_device *pair = ata_dev_pair(adev);
518 int khz[4] = { 50000, 40000, 33000, 25000 };
523 sysclk = opti_syscfg(0xAC) & 0xC0; /* BIOS set */
525 /* Enter configuration mode */
526 ioread16(ap->ioaddr.error_addr);
527 ioread16(ap->ioaddr.error_addr);
528 iowrite8(3, ap->ioaddr.nsect_addr);
530 /* Read VLB clock strapping */
531 clock = 1000000000 / khz[sysclk];
533 /* Get the timing data in cycles */
534 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
536 /* Setup timing is shared */
538 struct ata_timing tp;
539 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
541 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
544 active = clamp_val(t.active, 2, 17) - 2;
545 recover = clamp_val(t.recover, 1, 16) - 1;
546 setup = clamp_val(t.setup, 1, 4) - 1;
548 /* Select the right timing bank for write timing */
549 rc = ioread8(ap->ioaddr.lbal_addr);
551 rc |= (adev->devno << 7);
552 iowrite8(rc, ap->ioaddr.lbal_addr);
554 /* Write the timings */
555 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
557 /* Select the right bank for read timings, also
558 load the shared timings for address */
559 rc = ioread8(ap->ioaddr.device_addr);
561 rc |= adev->devno; /* Index select */
562 rc |= (setup << 4) | 0x04;
563 iowrite8(rc, ap->ioaddr.device_addr);
565 /* Load the read timings */
566 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
568 /* Ensure the timing register mode is right */
569 rc = ioread8(ap->ioaddr.lbal_addr);
572 iowrite8(rc, ap->ioaddr.lbal_addr);
574 /* Exit command mode */
575 iowrite8(0x83, ap->ioaddr.nsect_addr);
577 /* We need to know this for quad device on the MVB */
578 ap->host->private_data = ap;
582 * opt82c465mv_qc_issue - command issue
583 * @qc: command pending
585 * Called when the libata layer is about to issue a command. We wrap
586 * this interface so that we can load the correct ATA timings. The
587 * MVB has a single set of timing registers and these are shared
588 * across channels. As there are two registers we really ought to
589 * track the last two used values as a sort of register window. For
590 * now we just reload on a channel switch. On the single channel
591 * setup this condition never fires so we do nothing extra.
593 * FIXME: dual channel needs ->serialize support
596 static unsigned int opti82c46x_qc_issue(struct ata_queued_cmd *qc)
598 struct ata_port *ap = qc->ap;
599 struct ata_device *adev = qc->dev;
601 /* If timings are set and for the wrong channel (2nd test is
602 due to a libata shortcoming and will eventually go I hope) */
603 if (ap->host->private_data != ap->host
604 && ap->host->private_data != NULL)
605 opti82c46x_set_piomode(ap, adev);
607 return ata_sff_qc_issue(qc);
610 static struct ata_port_operations opti82c46x_port_ops = {
611 .inherits = &legacy_base_port_ops,
612 .set_piomode = opti82c46x_set_piomode,
613 .qc_issue = opti82c46x_qc_issue,
616 static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev)
619 struct legacy_data *ld_qdi = ap->host->private_data;
620 int active, recovery;
623 /* Get the timing data in cycles */
624 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
627 active = 8 - clamp_val(t.active, 1, 8);
628 recovery = 18 - clamp_val(t.recover, 3, 18);
630 active = 9 - clamp_val(t.active, 2, 9);
631 recovery = 15 - clamp_val(t.recover, 0, 15);
633 timing = (recovery << 4) | active | 0x08;
635 ld_qdi->clock[adev->devno] = timing;
637 outb(timing, ld_qdi->timing);
641 * qdi6580dp_set_piomode - PIO setup for dual channel
644 * @irq: interrupt line
646 * In dual channel mode the 6580 has one clock per channel and we have
647 * to software clockswitch in qc_issue.
650 static void qdi6580dp_set_piomode(struct ata_port *ap, struct ata_device *adev)
653 struct legacy_data *ld_qdi = ap->host->private_data;
654 int active, recovery;
657 /* Get the timing data in cycles */
658 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
661 active = 8 - clamp_val(t.active, 1, 8);
662 recovery = 18 - clamp_val(t.recover, 3, 18);
664 active = 9 - clamp_val(t.active, 2, 9);
665 recovery = 15 - clamp_val(t.recover, 0, 15);
667 timing = (recovery << 4) | active | 0x08;
669 ld_qdi->clock[adev->devno] = timing;
671 outb(timing, ld_qdi->timing + 2 * ap->port_no);
673 if (adev->class != ATA_DEV_ATA)
674 outb(0x5F, ld_qdi->timing + 3);
678 * qdi6580_set_piomode - PIO setup for single channel
682 * In single channel mode the 6580 has one clock per device and we can
683 * avoid the requirement to clock switch. We also have to load the timing
684 * into the right clock according to whether we are master or slave.
687 static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev)
690 struct legacy_data *ld_qdi = ap->host->private_data;
691 int active, recovery;
694 /* Get the timing data in cycles */
695 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
698 active = 8 - clamp_val(t.active, 1, 8);
699 recovery = 18 - clamp_val(t.recover, 3, 18);
701 active = 9 - clamp_val(t.active, 2, 9);
702 recovery = 15 - clamp_val(t.recover, 0, 15);
704 timing = (recovery << 4) | active | 0x08;
705 ld_qdi->clock[adev->devno] = timing;
706 outb(timing, ld_qdi->timing + 2 * adev->devno);
708 if (adev->class != ATA_DEV_ATA)
709 outb(0x5F, ld_qdi->timing + 3);
713 * qdi_qc_issue - command issue
714 * @qc: command pending
716 * Called when the libata layer is about to issue a command. We wrap
717 * this interface so that we can load the correct ATA timings.
720 static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc)
722 struct ata_port *ap = qc->ap;
723 struct ata_device *adev = qc->dev;
724 struct legacy_data *ld_qdi = ap->host->private_data;
726 if (ld_qdi->clock[adev->devno] != ld_qdi->last) {
727 if (adev->pio_mode) {
728 ld_qdi->last = ld_qdi->clock[adev->devno];
729 outb(ld_qdi->clock[adev->devno], ld_qdi->timing +
733 return ata_sff_qc_issue(qc);
736 static unsigned int vlb32_data_xfer(struct ata_device *adev, unsigned char *buf,
737 unsigned int buflen, int rw)
739 struct ata_port *ap = adev->link->ap;
740 int slop = buflen & 3;
742 if (ata_id_has_dword_io(adev->id)) {
744 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
746 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
748 if (unlikely(slop)) {
751 memcpy(&pad, buf + buflen - slop, slop);
752 pad = le32_to_cpu(pad);
753 iowrite32(pad, ap->ioaddr.data_addr);
755 pad = ioread32(ap->ioaddr.data_addr);
756 pad = cpu_to_le32(pad);
757 memcpy(buf + buflen - slop, &pad, slop);
760 return (buflen + 3) & ~3;
762 return ata_sff_data_xfer(adev, buf, buflen, rw);
765 static int qdi_port(struct platform_device *dev,
766 struct legacy_probe *lp, struct legacy_data *ld)
768 if (devm_request_region(&dev->dev, lp->private, 4, "qdi") == NULL)
770 ld->timing = lp->private;
774 static struct ata_port_operations qdi6500_port_ops = {
775 .inherits = &legacy_base_port_ops,
776 .set_piomode = qdi6500_set_piomode,
777 .qc_issue = qdi_qc_issue,
778 .sff_data_xfer = vlb32_data_xfer,
781 static struct ata_port_operations qdi6580_port_ops = {
782 .inherits = &legacy_base_port_ops,
783 .set_piomode = qdi6580_set_piomode,
784 .sff_data_xfer = vlb32_data_xfer,
787 static struct ata_port_operations qdi6580dp_port_ops = {
788 .inherits = &legacy_base_port_ops,
789 .set_piomode = qdi6580dp_set_piomode,
790 .sff_data_xfer = vlb32_data_xfer,
793 static DEFINE_SPINLOCK(winbond_lock);
795 static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
798 spin_lock_irqsave(&winbond_lock, flags);
799 outb(reg, port + 0x01);
800 outb(val, port + 0x02);
801 spin_unlock_irqrestore(&winbond_lock, flags);
804 static u8 winbond_readcfg(unsigned long port, u8 reg)
809 spin_lock_irqsave(&winbond_lock, flags);
810 outb(reg, port + 0x01);
811 val = inb(port + 0x02);
812 spin_unlock_irqrestore(&winbond_lock, flags);
817 static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
820 struct legacy_data *ld_winbond = ap->host->private_data;
821 int active, recovery;
823 int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
825 reg = winbond_readcfg(ld_winbond->timing, 0x81);
827 /* Get the timing data in cycles */
828 if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
829 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
831 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
833 active = (clamp_val(t.active, 3, 17) - 1) & 0x0F;
834 recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F;
835 timing = (active << 4) | recovery;
836 winbond_writecfg(ld_winbond->timing, timing, reg);
838 /* Load the setup timing */
841 if (adev->class != ATA_DEV_ATA)
842 reg |= 0x08; /* FIFO off */
843 if (!ata_pio_need_iordy(adev))
844 reg |= 0x02; /* IORDY off */
845 reg |= (clamp_val(t.setup, 0, 3) << 6);
846 winbond_writecfg(ld_winbond->timing, timing + 1, reg);
849 static int winbond_port(struct platform_device *dev,
850 struct legacy_probe *lp, struct legacy_data *ld)
852 if (devm_request_region(&dev->dev, lp->private, 4, "winbond") == NULL)
854 ld->timing = lp->private;
858 static struct ata_port_operations winbond_port_ops = {
859 .inherits = &legacy_base_port_ops,
860 .set_piomode = winbond_set_piomode,
861 .sff_data_xfer = vlb32_data_xfer,
864 static struct legacy_controller controllers[] = {
865 {"BIOS", &legacy_port_ops, 0x1F,
866 ATA_FLAG_NO_IORDY, NULL },
867 {"Snooping", &simple_port_ops, 0x1F,
869 {"PDC20230", &pdc20230_port_ops, 0x7,
870 ATA_FLAG_NO_IORDY, NULL },
871 {"HT6560A", &ht6560a_port_ops, 0x07,
872 ATA_FLAG_NO_IORDY, NULL },
873 {"HT6560B", &ht6560b_port_ops, 0x1F,
874 ATA_FLAG_NO_IORDY, NULL },
875 {"OPTI82C611A", &opti82c611a_port_ops, 0x0F,
877 {"OPTI82C46X", &opti82c46x_port_ops, 0x0F,
879 {"QDI6500", &qdi6500_port_ops, 0x07,
880 ATA_FLAG_NO_IORDY, qdi_port },
881 {"QDI6580", &qdi6580_port_ops, 0x1F,
883 {"QDI6580DP", &qdi6580dp_port_ops, 0x1F,
885 {"W83759A", &winbond_port_ops, 0x1F,
890 * probe_chip_type - Discover controller
891 * @probe: Probe entry to check
893 * Probe an ATA port and identify the type of controller. We don't
894 * check if the controller appears to be driveless at this point.
897 static __init int probe_chip_type(struct legacy_probe *probe)
899 int mask = 1 << probe->slot;
901 if (winbond && (probe->port == 0x1F0 || probe->port == 0x170)) {
902 u8 reg = winbond_readcfg(winbond, 0x81);
903 reg |= 0x80; /* jumpered mode off */
904 winbond_writecfg(winbond, 0x81, reg);
905 reg = winbond_readcfg(winbond, 0x83);
906 reg |= 0xF0; /* local control */
907 winbond_writecfg(winbond, 0x83, reg);
908 reg = winbond_readcfg(winbond, 0x85);
909 reg |= 0xF0; /* programmable timing */
910 winbond_writecfg(winbond, 0x85, reg);
912 reg = winbond_readcfg(winbond, 0x81);
917 if (probe->port == 0x1F0) {
919 local_irq_save(flags);
921 outb(inb(0x1F2) | 0x80, 0x1F2);
929 if ((inb(0x1F2) & 0x80) == 0) {
930 /* PDC20230c or 20630 ? */
931 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller"
935 local_irq_restore(flags);
941 if (inb(0x1F2) == 0x00)
942 printk(KERN_INFO "PDC20230-B VLB ATA "
943 "controller detected.\n");
944 local_irq_restore(flags);
947 local_irq_restore(flags);
954 if (opti82c611a & mask)
956 if (opti82c46x & mask)
958 if (autospeed & mask)
965 * legacy_init_one - attach a legacy interface
968 * Register an ISA bus IDE interface. Such interfaces are PIO and we
969 * assume do not support IRQ sharing.
972 static __init int legacy_init_one(struct legacy_probe *probe)
974 struct legacy_controller *controller = &controllers[probe->type];
975 int pio_modes = controller->pio_mask;
976 unsigned long io = probe->port;
977 u32 mask = (1 << probe->slot);
978 struct ata_port_operations *ops = controller->ops;
979 struct legacy_data *ld = &legacy_data[probe->slot];
980 struct ata_host *host = NULL;
982 struct platform_device *pdev;
983 struct ata_device *dev;
984 void __iomem *io_addr, *ctrl_addr;
985 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
988 iordy |= controller->flags;
990 pdev = platform_device_register_simple(DRV_NAME, probe->slot, NULL, 0);
992 return PTR_ERR(pdev);
995 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL ||
996 devm_request_region(&pdev->dev, io + 0x0206, 1,
997 "pata_legacy") == NULL)
1001 io_addr = devm_ioport_map(&pdev->dev, io, 8);
1002 ctrl_addr = devm_ioport_map(&pdev->dev, io + 0x0206, 1);
1003 if (!io_addr || !ctrl_addr)
1005 if (controller->setup)
1006 if (controller->setup(pdev, probe, ld) < 0)
1008 host = ata_host_alloc(&pdev->dev, 1);
1011 ap = host->ports[0];
1014 ap->pio_mask = pio_modes;
1015 ap->flags |= ATA_FLAG_SLAVE_POSS | iordy;
1016 ap->ioaddr.cmd_addr = io_addr;
1017 ap->ioaddr.altstatus_addr = ctrl_addr;
1018 ap->ioaddr.ctl_addr = ctrl_addr;
1019 ata_sff_std_ports(&ap->ioaddr);
1020 ap->host->private_data = ld;
1022 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io, io + 0x0206);
1024 ret = ata_host_activate(host, probe->irq, ata_sff_interrupt, 0,
1028 ld->platform_dev = pdev;
1030 /* Nothing found means we drop the port as its probably not there */
1033 ata_link_for_each_dev(dev, &ap->link) {
1034 if (!ata_dev_absent(dev)) {
1035 legacy_host[probe->slot] = host;
1036 ld->platform_dev = pdev;
1041 platform_device_unregister(pdev);
1046 * legacy_check_special_cases - ATA special cases
1047 * @p: PCI device to check
1048 * @master: set this if we find an ATA master
1049 * @master: set this if we find an ATA secondary
1051 * A small number of vendors implemented early PCI ATA interfaces
1052 * on bridge logic without the ATA interface being PCI visible.
1053 * Where we have a matching PCI driver we must skip the relevant
1054 * device here. If we don't know about it then the legacy driver
1055 * is the right driver anyway.
1058 static void __init legacy_check_special_cases(struct pci_dev *p, int *primary,
1061 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
1062 if (p->vendor == 0x1078 && p->device == 0x0000) {
1063 *primary = *secondary = 1;
1066 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
1067 if (p->vendor == 0x1078 && p->device == 0x0002) {
1068 *primary = *secondary = 1;
1071 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
1072 if (p->vendor == 0x8086 && p->device == 0x1234) {
1074 pci_read_config_word(p, 0x6C, &r);
1076 /* ATA port enabled */
1086 static __init void probe_opti_vlb(void)
1088 /* If an OPTI 82C46X is present find out where the channels are */
1089 static const char *optis[4] = {
1094 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
1096 opti82c46x = 3; /* Assume master and slave first */
1097 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n",
1100 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
1101 ctrl = opti_syscfg(0xAC);
1102 /* Check enabled and this port is the 465MV port. On the
1103 MVB we may have two channels */
1106 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1107 legacy_probe_add(0x170, 15, OPTI46X, 0);
1110 legacy_probe_add(0x170, 15, OPTI46X, 0);
1112 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1114 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1117 static __init void qdi65_identify_port(u8 r, u8 res, unsigned long port)
1119 static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
1120 /* Check card type */
1121 if ((r & 0xF0) == 0xC0) {
1122 /* QD6500: single channel */
1126 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01),
1129 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
1130 /* QD6580: dual channel */
1131 if (!request_region(port + 2 , 2, "pata_qdi")) {
1132 release_region(port, 2);
1135 res = inb(port + 3);
1136 /* Single channel mode ? */
1138 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01),
1140 else { /* Dual channel mode */
1141 legacy_probe_add(0x1F0, 14, QDI6580DP, port);
1142 /* port + 0x02, r & 0x04 */
1143 legacy_probe_add(0x170, 15, QDI6580DP, port + 2);
1145 release_region(port + 2, 2);
1149 static __init void probe_qdi_vlb(void)
1151 unsigned long flags;
1152 static const unsigned long qd_port[2] = { 0x30, 0xB0 };
1156 * Check each possible QD65xx base address
1159 for (i = 0; i < 2; i++) {
1160 unsigned long port = qd_port[i];
1164 if (request_region(port, 2, "pata_qdi")) {
1165 /* Check for a card */
1166 local_irq_save(flags);
1167 /* I have no h/w that needs this delay but it
1168 is present in the historic code */
1177 local_irq_restore(flags);
1181 release_region(port, 2);
1184 /* Passes the presence test */
1187 /* Check port agrees with port set */
1188 if ((r & 2) >> 1 == i)
1189 qdi65_identify_port(r, res, port);
1190 release_region(port, 2);
1196 * legacy_init - attach legacy interfaces
1198 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
1199 * Right now we do not scan the ide0 and ide1 address but should do so
1200 * for non PCI systems or systems with no PCI IDE legacy mode devices.
1201 * If you fix that note there are special cases to consider like VLB
1202 * drivers and CS5510/20.
1205 static __init int legacy_init(void)
1211 int pci_present = 0;
1212 struct legacy_probe *pl = &probe_list[0];
1215 struct pci_dev *p = NULL;
1217 for_each_pci_dev(p) {
1219 /* Check for any overlap of the system ATA mappings. Native
1220 mode controllers stuck on these addresses or some devices
1221 in 'raid' mode won't be found by the storage class test */
1222 for (r = 0; r < 6; r++) {
1223 if (pci_resource_start(p, r) == 0x1f0)
1225 if (pci_resource_start(p, r) == 0x170)
1228 /* Check for special cases */
1229 legacy_check_special_cases(p, &primary, &secondary);
1231 /* If PCI bus is present then don't probe for tertiary
1237 winbond = 0x130; /* Default port, alt is 1B0 */
1239 if (primary == 0 || all)
1240 legacy_probe_add(0x1F0, 14, UNKNOWN, 0);
1241 if (secondary == 0 || all)
1242 legacy_probe_add(0x170, 15, UNKNOWN, 0);
1244 if (probe_all || !pci_present) {
1245 /* ISA/VLB extra ports */
1246 legacy_probe_add(0x1E8, 11, UNKNOWN, 0);
1247 legacy_probe_add(0x168, 10, UNKNOWN, 0);
1248 legacy_probe_add(0x1E0, 8, UNKNOWN, 0);
1249 legacy_probe_add(0x160, 12, UNKNOWN, 0);
1257 for (i = 0; i < NR_HOST; i++, pl++) {
1260 if (pl->type == UNKNOWN)
1261 pl->type = probe_chip_type(pl);
1263 if (legacy_init_one(pl) == 0)
1271 static __exit void legacy_exit(void)
1275 for (i = 0; i < nr_legacy_host; i++) {
1276 struct legacy_data *ld = &legacy_data[i];
1277 ata_host_detach(legacy_host[i]);
1278 platform_device_unregister(ld->platform_dev);
1282 MODULE_AUTHOR("Alan Cox");
1283 MODULE_DESCRIPTION("low-level driver for legacy ATA");
1284 MODULE_LICENSE("GPL");
1285 MODULE_VERSION(DRV_VERSION);
1287 module_param(probe_all, int, 0);
1288 module_param(autospeed, int, 0);
1289 module_param(ht6560a, int, 0);
1290 module_param(ht6560b, int, 0);
1291 module_param(opti82c611a, int, 0);
1292 module_param(opti82c46x, int, 0);
1293 module_param(qdi, int, 0);
1294 module_param(pio_mask, int, 0);
1295 module_param(iordy_mask, int, 0);
1297 module_init(legacy_init);
1298 module_exit(legacy_exit);