2 * pata-legacy.c - Legacy port PATA/SATA controller driver.
3 * Copyright 2005/2006 Red Hat, 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_for_each_dev(dev, link, ENABLED) {
198 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
199 dev->pio_mode = XFER_PIO_0;
200 dev->xfer_mode = XFER_PIO_0;
201 dev->xfer_shift = ATA_SHIFT_PIO;
202 dev->flags |= ATA_DFLAG_PIO;
207 static struct scsi_host_template legacy_sht = {
208 ATA_PIO_SHT(DRV_NAME),
211 static const struct ata_port_operations legacy_base_port_ops = {
212 .inherits = &ata_sff_port_ops,
213 .cable_detect = ata_cable_40wire,
217 * These ops are used if the user indicates the hardware
218 * snoops the commands to decide on the mode and handles the
219 * mode selection "magically" itself. Several legacy controllers
220 * do this. The mode range can be set if it is not 0x1F by setting
224 static struct ata_port_operations simple_port_ops = {
225 .inherits = &legacy_base_port_ops,
226 .sff_data_xfer = ata_sff_data_xfer_noirq,
229 static struct ata_port_operations legacy_port_ops = {
230 .inherits = &legacy_base_port_ops,
231 .sff_data_xfer = ata_sff_data_xfer_noirq,
232 .set_mode = legacy_set_mode,
236 * Promise 20230C and 20620 support
238 * This controller supports PIO0 to PIO2. We set PIO timings
239 * conservatively to allow for 50MHz Vesa Local Bus. The 20620 DMA
240 * support is weird being DMA to controller and PIO'd to the host
244 static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
247 int pio = adev->pio_mode - XFER_PIO_0;
251 /* Safe as UP only. Force I/Os to occur together */
253 local_irq_save(flags);
255 /* Unlock the control interface */
258 outb(inb(0x1F2) | 0x80, 0x1F2);
265 while ((inb(0x1F2) & 0x80) && --tries);
267 local_irq_restore(flags);
269 outb(inb(0x1F4) & 0x07, 0x1F4);
272 rt &= 0x07 << (3 * adev->devno);
274 rt |= (1 + 3 * pio) << (3 * adev->devno);
277 outb(inb(0x1F2) | 0x01, 0x1F2);
283 static unsigned int pdc_data_xfer_vlb(struct ata_device *dev,
284 unsigned char *buf, unsigned int buflen, int rw)
286 int slop = buflen & 3;
287 /* 32bit I/O capable *and* we need to write a whole number of dwords */
288 if (ata_id_has_dword_io(dev->id) && (slop == 0 || slop == 3)) {
289 struct ata_port *ap = dev->link->ap;
292 local_irq_save(flags);
294 /* Perform the 32bit I/O synchronization sequence */
295 ioread8(ap->ioaddr.nsect_addr);
296 ioread8(ap->ioaddr.nsect_addr);
297 ioread8(ap->ioaddr.nsect_addr);
301 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
303 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
305 if (unlikely(slop)) {
308 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
309 memcpy(buf + buflen - slop, &pad, slop);
311 memcpy(&pad, buf + buflen - slop, slop);
312 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
316 local_irq_restore(flags);
318 buflen = ata_sff_data_xfer_noirq(dev, buf, buflen, rw);
323 static struct ata_port_operations pdc20230_port_ops = {
324 .inherits = &legacy_base_port_ops,
325 .set_piomode = pdc20230_set_piomode,
326 .sff_data_xfer = pdc_data_xfer_vlb,
330 * Holtek 6560A support
332 * This controller supports PIO0 to PIO2 (no IORDY even though higher
333 * timings can be loaded).
336 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
341 /* Get the timing data in cycles. For now play safe at 50Mhz */
342 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
344 active = clamp_val(t.active, 2, 15);
345 recover = clamp_val(t.recover, 4, 15);
352 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
353 ioread8(ap->ioaddr.status_addr);
356 static struct ata_port_operations ht6560a_port_ops = {
357 .inherits = &legacy_base_port_ops,
358 .set_piomode = ht6560a_set_piomode,
362 * Holtek 6560B support
364 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO
365 * setting unless we see an ATAPI device in which case we force it off.
367 * FIXME: need to implement 2nd channel support.
370 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
375 /* Get the timing data in cycles. For now play safe at 50Mhz */
376 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
378 active = clamp_val(t.active, 2, 15);
379 recover = clamp_val(t.recover, 2, 16);
387 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
389 if (adev->class != ATA_DEV_ATA) {
390 u8 rconf = inb(0x3E6);
396 ioread8(ap->ioaddr.status_addr);
399 static struct ata_port_operations ht6560b_port_ops = {
400 .inherits = &legacy_base_port_ops,
401 .set_piomode = ht6560b_set_piomode,
405 * Opti core chipset helpers
409 * opti_syscfg - read OPTI chipset configuration
410 * @reg: Configuration register to read
412 * Returns the value of an OPTI system board configuration register.
415 static u8 opti_syscfg(u8 reg)
420 /* Uniprocessor chipset and must force cycles adjancent */
421 local_irq_save(flags);
424 local_irq_restore(flags);
431 * This controller supports PIO0 to PIO3.
434 static void opti82c611a_set_piomode(struct ata_port *ap,
435 struct ata_device *adev)
437 u8 active, recover, setup;
439 struct ata_device *pair = ata_dev_pair(adev);
441 int khz[4] = { 50000, 40000, 33000, 25000 };
444 /* Enter configuration mode */
445 ioread16(ap->ioaddr.error_addr);
446 ioread16(ap->ioaddr.error_addr);
447 iowrite8(3, ap->ioaddr.nsect_addr);
449 /* Read VLB clock strapping */
450 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
452 /* Get the timing data in cycles */
453 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
455 /* Setup timing is shared */
457 struct ata_timing tp;
458 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
460 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
463 active = clamp_val(t.active, 2, 17) - 2;
464 recover = clamp_val(t.recover, 1, 16) - 1;
465 setup = clamp_val(t.setup, 1, 4) - 1;
467 /* Select the right timing bank for write timing */
468 rc = ioread8(ap->ioaddr.lbal_addr);
470 rc |= (adev->devno << 7);
471 iowrite8(rc, ap->ioaddr.lbal_addr);
473 /* Write the timings */
474 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
476 /* Select the right bank for read timings, also
477 load the shared timings for address */
478 rc = ioread8(ap->ioaddr.device_addr);
480 rc |= adev->devno; /* Index select */
481 rc |= (setup << 4) | 0x04;
482 iowrite8(rc, ap->ioaddr.device_addr);
484 /* Load the read timings */
485 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
487 /* Ensure the timing register mode is right */
488 rc = ioread8(ap->ioaddr.lbal_addr);
491 iowrite8(rc, ap->ioaddr.lbal_addr);
493 /* Exit command mode */
494 iowrite8(0x83, ap->ioaddr.nsect_addr);
498 static struct ata_port_operations opti82c611a_port_ops = {
499 .inherits = &legacy_base_port_ops,
500 .set_piomode = opti82c611a_set_piomode,
506 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
507 * version is dual channel but doesn't have a lot of unique registers.
510 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
512 u8 active, recover, setup;
514 struct ata_device *pair = ata_dev_pair(adev);
516 int khz[4] = { 50000, 40000, 33000, 25000 };
521 sysclk = opti_syscfg(0xAC) & 0xC0; /* BIOS set */
523 /* Enter configuration mode */
524 ioread16(ap->ioaddr.error_addr);
525 ioread16(ap->ioaddr.error_addr);
526 iowrite8(3, ap->ioaddr.nsect_addr);
528 /* Read VLB clock strapping */
529 clock = 1000000000 / khz[sysclk];
531 /* Get the timing data in cycles */
532 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
534 /* Setup timing is shared */
536 struct ata_timing tp;
537 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
539 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
542 active = clamp_val(t.active, 2, 17) - 2;
543 recover = clamp_val(t.recover, 1, 16) - 1;
544 setup = clamp_val(t.setup, 1, 4) - 1;
546 /* Select the right timing bank for write timing */
547 rc = ioread8(ap->ioaddr.lbal_addr);
549 rc |= (adev->devno << 7);
550 iowrite8(rc, ap->ioaddr.lbal_addr);
552 /* Write the timings */
553 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
555 /* Select the right bank for read timings, also
556 load the shared timings for address */
557 rc = ioread8(ap->ioaddr.device_addr);
559 rc |= adev->devno; /* Index select */
560 rc |= (setup << 4) | 0x04;
561 iowrite8(rc, ap->ioaddr.device_addr);
563 /* Load the read timings */
564 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
566 /* Ensure the timing register mode is right */
567 rc = ioread8(ap->ioaddr.lbal_addr);
570 iowrite8(rc, ap->ioaddr.lbal_addr);
572 /* Exit command mode */
573 iowrite8(0x83, ap->ioaddr.nsect_addr);
575 /* We need to know this for quad device on the MVB */
576 ap->host->private_data = ap;
580 * opt82c465mv_qc_issue - command issue
581 * @qc: command pending
583 * Called when the libata layer is about to issue a command. We wrap
584 * this interface so that we can load the correct ATA timings. The
585 * MVB has a single set of timing registers and these are shared
586 * across channels. As there are two registers we really ought to
587 * track the last two used values as a sort of register window. For
588 * now we just reload on a channel switch. On the single channel
589 * setup this condition never fires so we do nothing extra.
591 * FIXME: dual channel needs ->serialize support
594 static unsigned int opti82c46x_qc_issue(struct ata_queued_cmd *qc)
596 struct ata_port *ap = qc->ap;
597 struct ata_device *adev = qc->dev;
599 /* If timings are set and for the wrong channel (2nd test is
600 due to a libata shortcoming and will eventually go I hope) */
601 if (ap->host->private_data != ap->host
602 && ap->host->private_data != NULL)
603 opti82c46x_set_piomode(ap, adev);
605 return ata_sff_qc_issue(qc);
608 static struct ata_port_operations opti82c46x_port_ops = {
609 .inherits = &legacy_base_port_ops,
610 .set_piomode = opti82c46x_set_piomode,
611 .qc_issue = opti82c46x_qc_issue,
614 static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev)
617 struct legacy_data *ld_qdi = ap->host->private_data;
618 int active, recovery;
621 /* Get the timing data in cycles */
622 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
625 active = 8 - clamp_val(t.active, 1, 8);
626 recovery = 18 - clamp_val(t.recover, 3, 18);
628 active = 9 - clamp_val(t.active, 2, 9);
629 recovery = 15 - clamp_val(t.recover, 0, 15);
631 timing = (recovery << 4) | active | 0x08;
633 ld_qdi->clock[adev->devno] = timing;
635 outb(timing, ld_qdi->timing);
639 * qdi6580dp_set_piomode - PIO setup for dual channel
643 * In dual channel mode the 6580 has one clock per channel and we have
644 * to software clockswitch in qc_issue.
647 static void qdi6580dp_set_piomode(struct ata_port *ap, struct ata_device *adev)
650 struct legacy_data *ld_qdi = ap->host->private_data;
651 int active, recovery;
654 /* Get the timing data in cycles */
655 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
658 active = 8 - clamp_val(t.active, 1, 8);
659 recovery = 18 - clamp_val(t.recover, 3, 18);
661 active = 9 - clamp_val(t.active, 2, 9);
662 recovery = 15 - clamp_val(t.recover, 0, 15);
664 timing = (recovery << 4) | active | 0x08;
666 ld_qdi->clock[adev->devno] = timing;
668 outb(timing, ld_qdi->timing + 2 * ap->port_no);
670 if (adev->class != ATA_DEV_ATA)
671 outb(0x5F, ld_qdi->timing + 3);
675 * qdi6580_set_piomode - PIO setup for single channel
679 * In single channel mode the 6580 has one clock per device and we can
680 * avoid the requirement to clock switch. We also have to load the timing
681 * into the right clock according to whether we are master or slave.
684 static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev)
687 struct legacy_data *ld_qdi = ap->host->private_data;
688 int active, recovery;
691 /* Get the timing data in cycles */
692 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
695 active = 8 - clamp_val(t.active, 1, 8);
696 recovery = 18 - clamp_val(t.recover, 3, 18);
698 active = 9 - clamp_val(t.active, 2, 9);
699 recovery = 15 - clamp_val(t.recover, 0, 15);
701 timing = (recovery << 4) | active | 0x08;
702 ld_qdi->clock[adev->devno] = timing;
703 outb(timing, ld_qdi->timing + 2 * adev->devno);
705 if (adev->class != ATA_DEV_ATA)
706 outb(0x5F, ld_qdi->timing + 3);
710 * qdi_qc_issue - command issue
711 * @qc: command pending
713 * Called when the libata layer is about to issue a command. We wrap
714 * this interface so that we can load the correct ATA timings.
717 static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc)
719 struct ata_port *ap = qc->ap;
720 struct ata_device *adev = qc->dev;
721 struct legacy_data *ld_qdi = ap->host->private_data;
723 if (ld_qdi->clock[adev->devno] != ld_qdi->last) {
724 if (adev->pio_mode) {
725 ld_qdi->last = ld_qdi->clock[adev->devno];
726 outb(ld_qdi->clock[adev->devno], ld_qdi->timing +
730 return ata_sff_qc_issue(qc);
733 static unsigned int vlb32_data_xfer(struct ata_device *adev, unsigned char *buf,
734 unsigned int buflen, int rw)
736 struct ata_port *ap = adev->link->ap;
737 int slop = buflen & 3;
739 if (ata_id_has_dword_io(adev->id) && (slop == 0 || slop == 3)) {
741 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
743 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
745 if (unlikely(slop)) {
748 memcpy(&pad, buf + buflen - slop, slop);
749 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
751 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
752 memcpy(buf + buflen - slop, &pad, slop);
755 return (buflen + 3) & ~3;
757 return ata_sff_data_xfer(adev, buf, buflen, rw);
760 static int qdi_port(struct platform_device *dev,
761 struct legacy_probe *lp, struct legacy_data *ld)
763 if (devm_request_region(&dev->dev, lp->private, 4, "qdi") == NULL)
765 ld->timing = lp->private;
769 static struct ata_port_operations qdi6500_port_ops = {
770 .inherits = &legacy_base_port_ops,
771 .set_piomode = qdi6500_set_piomode,
772 .qc_issue = qdi_qc_issue,
773 .sff_data_xfer = vlb32_data_xfer,
776 static struct ata_port_operations qdi6580_port_ops = {
777 .inherits = &legacy_base_port_ops,
778 .set_piomode = qdi6580_set_piomode,
779 .sff_data_xfer = vlb32_data_xfer,
782 static struct ata_port_operations qdi6580dp_port_ops = {
783 .inherits = &legacy_base_port_ops,
784 .set_piomode = qdi6580dp_set_piomode,
785 .sff_data_xfer = vlb32_data_xfer,
788 static DEFINE_SPINLOCK(winbond_lock);
790 static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
793 spin_lock_irqsave(&winbond_lock, flags);
794 outb(reg, port + 0x01);
795 outb(val, port + 0x02);
796 spin_unlock_irqrestore(&winbond_lock, flags);
799 static u8 winbond_readcfg(unsigned long port, u8 reg)
804 spin_lock_irqsave(&winbond_lock, flags);
805 outb(reg, port + 0x01);
806 val = inb(port + 0x02);
807 spin_unlock_irqrestore(&winbond_lock, flags);
812 static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
815 struct legacy_data *ld_winbond = ap->host->private_data;
816 int active, recovery;
818 int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
820 reg = winbond_readcfg(ld_winbond->timing, 0x81);
822 /* Get the timing data in cycles */
823 if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
824 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
826 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
828 active = (clamp_val(t.active, 3, 17) - 1) & 0x0F;
829 recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F;
830 timing = (active << 4) | recovery;
831 winbond_writecfg(ld_winbond->timing, timing, reg);
833 /* Load the setup timing */
836 if (adev->class != ATA_DEV_ATA)
837 reg |= 0x08; /* FIFO off */
838 if (!ata_pio_need_iordy(adev))
839 reg |= 0x02; /* IORDY off */
840 reg |= (clamp_val(t.setup, 0, 3) << 6);
841 winbond_writecfg(ld_winbond->timing, timing + 1, reg);
844 static int winbond_port(struct platform_device *dev,
845 struct legacy_probe *lp, struct legacy_data *ld)
847 if (devm_request_region(&dev->dev, lp->private, 4, "winbond") == NULL)
849 ld->timing = lp->private;
853 static struct ata_port_operations winbond_port_ops = {
854 .inherits = &legacy_base_port_ops,
855 .set_piomode = winbond_set_piomode,
856 .sff_data_xfer = vlb32_data_xfer,
859 static struct legacy_controller controllers[] = {
860 {"BIOS", &legacy_port_ops, 0x1F,
861 ATA_FLAG_NO_IORDY, NULL },
862 {"Snooping", &simple_port_ops, 0x1F,
864 {"PDC20230", &pdc20230_port_ops, 0x7,
865 ATA_FLAG_NO_IORDY, NULL },
866 {"HT6560A", &ht6560a_port_ops, 0x07,
867 ATA_FLAG_NO_IORDY, NULL },
868 {"HT6560B", &ht6560b_port_ops, 0x1F,
869 ATA_FLAG_NO_IORDY, NULL },
870 {"OPTI82C611A", &opti82c611a_port_ops, 0x0F,
872 {"OPTI82C46X", &opti82c46x_port_ops, 0x0F,
874 {"QDI6500", &qdi6500_port_ops, 0x07,
875 ATA_FLAG_NO_IORDY, qdi_port },
876 {"QDI6580", &qdi6580_port_ops, 0x1F,
878 {"QDI6580DP", &qdi6580dp_port_ops, 0x1F,
880 {"W83759A", &winbond_port_ops, 0x1F,
885 * probe_chip_type - Discover controller
886 * @probe: Probe entry to check
888 * Probe an ATA port and identify the type of controller. We don't
889 * check if the controller appears to be driveless at this point.
892 static __init int probe_chip_type(struct legacy_probe *probe)
894 int mask = 1 << probe->slot;
896 if (winbond && (probe->port == 0x1F0 || probe->port == 0x170)) {
897 u8 reg = winbond_readcfg(winbond, 0x81);
898 reg |= 0x80; /* jumpered mode off */
899 winbond_writecfg(winbond, 0x81, reg);
900 reg = winbond_readcfg(winbond, 0x83);
901 reg |= 0xF0; /* local control */
902 winbond_writecfg(winbond, 0x83, reg);
903 reg = winbond_readcfg(winbond, 0x85);
904 reg |= 0xF0; /* programmable timing */
905 winbond_writecfg(winbond, 0x85, reg);
907 reg = winbond_readcfg(winbond, 0x81);
912 if (probe->port == 0x1F0) {
914 local_irq_save(flags);
916 outb(inb(0x1F2) | 0x80, 0x1F2);
924 if ((inb(0x1F2) & 0x80) == 0) {
925 /* PDC20230c or 20630 ? */
926 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller"
930 local_irq_restore(flags);
936 if (inb(0x1F2) == 0x00)
937 printk(KERN_INFO "PDC20230-B VLB ATA "
938 "controller detected.\n");
939 local_irq_restore(flags);
942 local_irq_restore(flags);
949 if (opti82c611a & mask)
951 if (opti82c46x & mask)
953 if (autospeed & mask)
960 * legacy_init_one - attach a legacy interface
963 * Register an ISA bus IDE interface. Such interfaces are PIO and we
964 * assume do not support IRQ sharing.
967 static __init int legacy_init_one(struct legacy_probe *probe)
969 struct legacy_controller *controller = &controllers[probe->type];
970 int pio_modes = controller->pio_mask;
971 unsigned long io = probe->port;
972 u32 mask = (1 << probe->slot);
973 struct ata_port_operations *ops = controller->ops;
974 struct legacy_data *ld = &legacy_data[probe->slot];
975 struct ata_host *host = NULL;
977 struct platform_device *pdev;
978 struct ata_device *dev;
979 void __iomem *io_addr, *ctrl_addr;
980 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
983 iordy |= controller->flags;
985 pdev = platform_device_register_simple(DRV_NAME, probe->slot, NULL, 0);
987 return PTR_ERR(pdev);
990 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL ||
991 devm_request_region(&pdev->dev, io + 0x0206, 1,
992 "pata_legacy") == NULL)
996 io_addr = devm_ioport_map(&pdev->dev, io, 8);
997 ctrl_addr = devm_ioport_map(&pdev->dev, io + 0x0206, 1);
998 if (!io_addr || !ctrl_addr)
1000 if (controller->setup)
1001 if (controller->setup(pdev, probe, ld) < 0)
1003 host = ata_host_alloc(&pdev->dev, 1);
1006 ap = host->ports[0];
1009 ap->pio_mask = pio_modes;
1010 ap->flags |= ATA_FLAG_SLAVE_POSS | iordy;
1011 ap->ioaddr.cmd_addr = io_addr;
1012 ap->ioaddr.altstatus_addr = ctrl_addr;
1013 ap->ioaddr.ctl_addr = ctrl_addr;
1014 ata_sff_std_ports(&ap->ioaddr);
1015 ap->host->private_data = ld;
1017 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io, io + 0x0206);
1019 ret = ata_host_activate(host, probe->irq, ata_sff_interrupt, 0,
1023 ld->platform_dev = pdev;
1025 /* Nothing found means we drop the port as its probably not there */
1028 ata_for_each_dev(dev, &ap->link, ALL) {
1029 if (!ata_dev_absent(dev)) {
1030 legacy_host[probe->slot] = host;
1031 ld->platform_dev = pdev;
1036 platform_device_unregister(pdev);
1041 * legacy_check_special_cases - ATA special cases
1042 * @p: PCI device to check
1043 * @master: set this if we find an ATA master
1044 * @master: set this if we find an ATA secondary
1046 * A small number of vendors implemented early PCI ATA interfaces
1047 * on bridge logic without the ATA interface being PCI visible.
1048 * Where we have a matching PCI driver we must skip the relevant
1049 * device here. If we don't know about it then the legacy driver
1050 * is the right driver anyway.
1053 static void __init legacy_check_special_cases(struct pci_dev *p, int *primary,
1056 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
1057 if (p->vendor == 0x1078 && p->device == 0x0000) {
1058 *primary = *secondary = 1;
1061 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
1062 if (p->vendor == 0x1078 && p->device == 0x0002) {
1063 *primary = *secondary = 1;
1066 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
1067 if (p->vendor == 0x8086 && p->device == 0x1234) {
1069 pci_read_config_word(p, 0x6C, &r);
1071 /* ATA port enabled */
1081 static __init void probe_opti_vlb(void)
1083 /* If an OPTI 82C46X is present find out where the channels are */
1084 static const char *optis[4] = {
1089 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
1091 opti82c46x = 3; /* Assume master and slave first */
1092 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n",
1095 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
1096 ctrl = opti_syscfg(0xAC);
1097 /* Check enabled and this port is the 465MV port. On the
1098 MVB we may have two channels */
1101 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1102 legacy_probe_add(0x170, 15, OPTI46X, 0);
1105 legacy_probe_add(0x170, 15, OPTI46X, 0);
1107 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1109 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1112 static __init void qdi65_identify_port(u8 r, u8 res, unsigned long port)
1114 static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
1115 /* Check card type */
1116 if ((r & 0xF0) == 0xC0) {
1117 /* QD6500: single channel */
1121 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01),
1124 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
1125 /* QD6580: dual channel */
1126 if (!request_region(port + 2 , 2, "pata_qdi")) {
1127 release_region(port, 2);
1130 res = inb(port + 3);
1131 /* Single channel mode ? */
1133 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01),
1135 else { /* Dual channel mode */
1136 legacy_probe_add(0x1F0, 14, QDI6580DP, port);
1137 /* port + 0x02, r & 0x04 */
1138 legacy_probe_add(0x170, 15, QDI6580DP, port + 2);
1140 release_region(port + 2, 2);
1144 static __init void probe_qdi_vlb(void)
1146 unsigned long flags;
1147 static const unsigned long qd_port[2] = { 0x30, 0xB0 };
1151 * Check each possible QD65xx base address
1154 for (i = 0; i < 2; i++) {
1155 unsigned long port = qd_port[i];
1159 if (request_region(port, 2, "pata_qdi")) {
1160 /* Check for a card */
1161 local_irq_save(flags);
1162 /* I have no h/w that needs this delay but it
1163 is present in the historic code */
1172 local_irq_restore(flags);
1176 release_region(port, 2);
1179 /* Passes the presence test */
1182 /* Check port agrees with port set */
1183 if ((r & 2) >> 1 == i)
1184 qdi65_identify_port(r, res, port);
1185 release_region(port, 2);
1191 * legacy_init - attach legacy interfaces
1193 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
1194 * Right now we do not scan the ide0 and ide1 address but should do so
1195 * for non PCI systems or systems with no PCI IDE legacy mode devices.
1196 * If you fix that note there are special cases to consider like VLB
1197 * drivers and CS5510/20.
1200 static __init int legacy_init(void)
1206 int pci_present = 0;
1207 struct legacy_probe *pl = &probe_list[0];
1210 struct pci_dev *p = NULL;
1212 for_each_pci_dev(p) {
1214 /* Check for any overlap of the system ATA mappings. Native
1215 mode controllers stuck on these addresses or some devices
1216 in 'raid' mode won't be found by the storage class test */
1217 for (r = 0; r < 6; r++) {
1218 if (pci_resource_start(p, r) == 0x1f0)
1220 if (pci_resource_start(p, r) == 0x170)
1223 /* Check for special cases */
1224 legacy_check_special_cases(p, &primary, &secondary);
1226 /* If PCI bus is present then don't probe for tertiary
1232 winbond = 0x130; /* Default port, alt is 1B0 */
1234 if (primary == 0 || all)
1235 legacy_probe_add(0x1F0, 14, UNKNOWN, 0);
1236 if (secondary == 0 || all)
1237 legacy_probe_add(0x170, 15, UNKNOWN, 0);
1239 if (probe_all || !pci_present) {
1240 /* ISA/VLB extra ports */
1241 legacy_probe_add(0x1E8, 11, UNKNOWN, 0);
1242 legacy_probe_add(0x168, 10, UNKNOWN, 0);
1243 legacy_probe_add(0x1E0, 8, UNKNOWN, 0);
1244 legacy_probe_add(0x160, 12, UNKNOWN, 0);
1252 for (i = 0; i < NR_HOST; i++, pl++) {
1255 if (pl->type == UNKNOWN)
1256 pl->type = probe_chip_type(pl);
1258 if (legacy_init_one(pl) == 0)
1266 static __exit void legacy_exit(void)
1270 for (i = 0; i < nr_legacy_host; i++) {
1271 struct legacy_data *ld = &legacy_data[i];
1272 ata_host_detach(legacy_host[i]);
1273 platform_device_unregister(ld->platform_dev);
1277 MODULE_AUTHOR("Alan Cox");
1278 MODULE_DESCRIPTION("low-level driver for legacy ATA");
1279 MODULE_LICENSE("GPL");
1280 MODULE_VERSION(DRV_VERSION);
1282 module_param(probe_all, int, 0);
1283 module_param(autospeed, int, 0);
1284 module_param(ht6560a, int, 0);
1285 module_param(ht6560b, int, 0);
1286 module_param(opti82c611a, int, 0);
1287 module_param(opti82c46x, int, 0);
1288 module_param(qdi, int, 0);
1289 module_param(pio_mask, int, 0);
1290 module_param(iordy_mask, int, 0);
1292 module_init(legacy_init);
1293 module_exit(legacy_exit);