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 * http://www.ryston.cz/petr/vlb/qd6500.html
30 * http://www.ryston.cz/petr/vlb/qd6580.html
32 * QDI65x0 probe code based on drivers/ide/legacy/qd65xx.c
33 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
34 * Samuel Thibault <samuel.thibault@ens-lyon.org>
36 * Unsupported but docs exist:
37 * Appian/Adaptec AIC25VL01/Cirrus Logic PD7220
39 * This driver handles legacy (that is "ISA/VLB side") IDE ports found
40 * on PC class systems. There are three hybrid devices that are exceptions
41 * The Cyrix 5510/5520 where a pre SFF ATA device is on the bridge and
42 * the MPIIX where the tuning is PCI side but the IDE is "ISA side".
44 * Specific support is included for the ht6560a/ht6560b/opti82c611a/
45 * opti82c465mv/promise 20230c/20630/qdi65x0/winbond83759A
47 * Support for the Winbond 83759A when operating in advanced mode.
48 * Multichip mode is not currently supported.
50 * Use the autospeed and pio_mask options with:
51 * Appian ADI/2 aka CLPD7220 or AIC25VL01.
52 * Use the jumpers, autospeed and set pio_mask to the mode on the jumpers with
53 * Goldstar GM82C711, PIC-1288A-125, UMC 82C871F, Winbond W83759,
54 * Winbond W83759A, Promise PDC20230-B
56 * For now use autospeed and pio_mask as above with the W83759A. This may
61 #include <linux/async.h>
62 #include <linux/kernel.h>
63 #include <linux/module.h>
64 #include <linux/pci.h>
65 #include <linux/init.h>
66 #include <linux/blkdev.h>
67 #include <linux/delay.h>
68 #include <scsi/scsi_host.h>
69 #include <linux/ata.h>
70 #include <linux/libata.h>
71 #include <linux/platform_device.h>
73 #define DRV_NAME "pata_legacy"
74 #define DRV_VERSION "0.6.5"
79 module_param(all, int, 0444);
80 MODULE_PARM_DESC(all, "Grab all legacy port devices, even if PCI(0=off, 1=on)");
92 QDI6580DP = 9, /* Dual channel mode is different */
103 enum controller type;
104 struct platform_device *platform_dev;
107 struct legacy_probe {
112 enum controller type;
113 unsigned long private;
116 struct legacy_controller {
118 struct ata_port_operations *ops;
119 unsigned int pio_mask;
122 int (*setup)(struct platform_device *, struct legacy_probe *probe,
123 struct legacy_data *data);
126 static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
128 static struct legacy_probe probe_list[NR_HOST];
129 static struct legacy_data legacy_data[NR_HOST];
130 static struct ata_host *legacy_host[NR_HOST];
131 static int nr_legacy_host;
134 static int probe_all; /* Set to check all ISA port ranges */
135 static int ht6560a; /* HT 6560A on primary 1, second 2, both 3 */
136 static int ht6560b; /* HT 6560A on primary 1, second 2, both 3 */
137 static int opti82c611a; /* Opti82c611A on primary 1, sec 2, both 3 */
138 static int opti82c46x; /* Opti 82c465MV present(pri/sec autodetect) */
139 static int autospeed; /* Chip present which snoops speed changes */
140 static int pio_mask = ATA_PIO4; /* PIO range for autospeed devices */
141 static int iordy_mask = 0xFFFFFFFF; /* Use iordy if available */
143 /* Set to probe QDI controllers */
144 #ifdef CONFIG_PATA_QDI_MODULE
150 #ifdef CONFIG_PATA_WINBOND_VLB_MODULE
151 static int winbond = 1; /* Set to probe Winbond controllers,
152 give I/O port if non standard */
154 static int winbond; /* Set to probe Winbond controllers,
155 give I/O port if non standard */
159 * legacy_probe_add - Add interface to probe list
160 * @port: Controller port
162 * @type: Controller type
163 * @private: Controller specific info
165 * Add an entry into the probe list for ATA controllers. This is used
166 * to add the default ISA slots and then to build up the table
167 * further according to other ISA/VLB/Weird device scans
169 * An I/O port list is used to keep ordering stable and sane, as we
170 * don't have any good way to talk about ordering otherwise
173 static int legacy_probe_add(unsigned long port, unsigned int irq,
174 enum controller type, unsigned long private)
176 struct legacy_probe *lp = &probe_list[0];
178 struct legacy_probe *free = NULL;
180 for (i = 0; i < NR_HOST; i++) {
181 if (lp->port == 0 && free == NULL)
183 /* Matching port, or the correct slot for ordering */
184 if (lp->port == port || legacy_port[i] == port) {
191 printk(KERN_ERR "pata_legacy: Too many interfaces.\n");
194 /* Fill in the entry for later probing */
198 free->private = private;
204 * legacy_set_mode - mode setting
206 * @unused: Device that failed when error is returned
208 * Use a non standard set_mode function. We don't want to be tuned.
210 * The BIOS configured everything. Our job is not to fiddle. Just use
211 * whatever PIO the hardware is using and leave it at that. When we
212 * get some kind of nice user driven API for control then we can
213 * expand on this as per hdparm in the base kernel.
216 static int legacy_set_mode(struct ata_link *link, struct ata_device **unused)
218 struct ata_device *dev;
220 ata_for_each_dev(dev, link, ENABLED) {
221 ata_dev_info(dev, "configured for PIO\n");
222 dev->pio_mode = XFER_PIO_0;
223 dev->xfer_mode = XFER_PIO_0;
224 dev->xfer_shift = ATA_SHIFT_PIO;
225 dev->flags |= ATA_DFLAG_PIO;
230 static struct scsi_host_template legacy_sht = {
231 ATA_PIO_SHT(DRV_NAME),
234 static const struct ata_port_operations legacy_base_port_ops = {
235 .inherits = &ata_sff_port_ops,
236 .cable_detect = ata_cable_40wire,
240 * These ops are used if the user indicates the hardware
241 * snoops the commands to decide on the mode and handles the
242 * mode selection "magically" itself. Several legacy controllers
243 * do this. The mode range can be set if it is not 0x1F by setting
247 static struct ata_port_operations simple_port_ops = {
248 .inherits = &legacy_base_port_ops,
249 .sff_data_xfer = ata_sff_data_xfer32,
252 static struct ata_port_operations legacy_port_ops = {
253 .inherits = &legacy_base_port_ops,
254 .sff_data_xfer = ata_sff_data_xfer32,
255 .set_mode = legacy_set_mode,
259 * Promise 20230C and 20620 support
261 * This controller supports PIO0 to PIO2. We set PIO timings
262 * conservatively to allow for 50MHz Vesa Local Bus. The 20620 DMA
263 * support is weird being DMA to controller and PIO'd to the host
267 static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
270 int pio = adev->pio_mode - XFER_PIO_0;
274 /* Safe as UP only. Force I/Os to occur together */
276 local_irq_save(flags);
278 /* Unlock the control interface */
281 outb(inb(0x1F2) | 0x80, 0x1F2);
288 while ((inb(0x1F2) & 0x80) && --tries);
290 local_irq_restore(flags);
292 outb(inb(0x1F4) & 0x07, 0x1F4);
295 rt &= 0x07 << (3 * adev->devno);
297 rt |= (1 + 3 * pio) << (3 * adev->devno);
300 outb(inb(0x1F2) | 0x01, 0x1F2);
306 static unsigned int pdc_data_xfer_vlb(struct ata_queued_cmd *qc,
307 unsigned char *buf, unsigned int buflen, int rw)
309 struct ata_device *dev = qc->dev;
310 struct ata_port *ap = dev->link->ap;
311 int slop = buflen & 3;
313 /* 32bit I/O capable *and* we need to write a whole number of dwords */
314 if (ata_id_has_dword_io(dev->id) && (slop == 0 || slop == 3)
315 && (ap->pflags & ATA_PFLAG_PIO32)) {
318 local_irq_save(flags);
320 /* Perform the 32bit I/O synchronization sequence */
321 ioread8(ap->ioaddr.nsect_addr);
322 ioread8(ap->ioaddr.nsect_addr);
323 ioread8(ap->ioaddr.nsect_addr);
327 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
329 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
331 if (unlikely(slop)) {
334 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
335 memcpy(buf + buflen - slop, &pad, slop);
337 memcpy(&pad, buf + buflen - slop, slop);
338 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
342 local_irq_restore(flags);
344 buflen = ata_sff_data_xfer32(qc, buf, buflen, rw);
349 static struct ata_port_operations pdc20230_port_ops = {
350 .inherits = &legacy_base_port_ops,
351 .set_piomode = pdc20230_set_piomode,
352 .sff_data_xfer = pdc_data_xfer_vlb,
356 * Holtek 6560A support
358 * This controller supports PIO0 to PIO2 (no IORDY even though higher
359 * timings can be loaded).
362 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
367 /* Get the timing data in cycles. For now play safe at 50Mhz */
368 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
370 active = clamp_val(t.active, 2, 15);
371 recover = clamp_val(t.recover, 4, 15);
378 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
379 ioread8(ap->ioaddr.status_addr);
382 static struct ata_port_operations ht6560a_port_ops = {
383 .inherits = &legacy_base_port_ops,
384 .set_piomode = ht6560a_set_piomode,
388 * Holtek 6560B support
390 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO
391 * setting unless we see an ATAPI device in which case we force it off.
393 * FIXME: need to implement 2nd channel support.
396 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
401 /* Get the timing data in cycles. For now play safe at 50Mhz */
402 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
404 active = clamp_val(t.active, 2, 15);
405 recover = clamp_val(t.recover, 2, 16) & 0x0F;
412 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
414 if (adev->class != ATA_DEV_ATA) {
415 u8 rconf = inb(0x3E6);
421 ioread8(ap->ioaddr.status_addr);
424 static struct ata_port_operations ht6560b_port_ops = {
425 .inherits = &legacy_base_port_ops,
426 .set_piomode = ht6560b_set_piomode,
430 * Opti core chipset helpers
434 * opti_syscfg - read OPTI chipset configuration
435 * @reg: Configuration register to read
437 * Returns the value of an OPTI system board configuration register.
440 static u8 opti_syscfg(u8 reg)
445 /* Uniprocessor chipset and must force cycles adjancent */
446 local_irq_save(flags);
449 local_irq_restore(flags);
456 * This controller supports PIO0 to PIO3.
459 static void opti82c611a_set_piomode(struct ata_port *ap,
460 struct ata_device *adev)
462 u8 active, recover, setup;
464 struct ata_device *pair = ata_dev_pair(adev);
466 int khz[4] = { 50000, 40000, 33000, 25000 };
469 /* Enter configuration mode */
470 ioread16(ap->ioaddr.error_addr);
471 ioread16(ap->ioaddr.error_addr);
472 iowrite8(3, ap->ioaddr.nsect_addr);
474 /* Read VLB clock strapping */
475 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
477 /* Get the timing data in cycles */
478 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
480 /* Setup timing is shared */
482 struct ata_timing tp;
483 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
485 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
488 active = clamp_val(t.active, 2, 17) - 2;
489 recover = clamp_val(t.recover, 1, 16) - 1;
490 setup = clamp_val(t.setup, 1, 4) - 1;
492 /* Select the right timing bank for write timing */
493 rc = ioread8(ap->ioaddr.lbal_addr);
495 rc |= (adev->devno << 7);
496 iowrite8(rc, ap->ioaddr.lbal_addr);
498 /* Write the timings */
499 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
501 /* Select the right bank for read timings, also
502 load the shared timings for address */
503 rc = ioread8(ap->ioaddr.device_addr);
505 rc |= adev->devno; /* Index select */
506 rc |= (setup << 4) | 0x04;
507 iowrite8(rc, ap->ioaddr.device_addr);
509 /* Load the read timings */
510 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
512 /* Ensure the timing register mode is right */
513 rc = ioread8(ap->ioaddr.lbal_addr);
516 iowrite8(rc, ap->ioaddr.lbal_addr);
518 /* Exit command mode */
519 iowrite8(0x83, ap->ioaddr.nsect_addr);
523 static struct ata_port_operations opti82c611a_port_ops = {
524 .inherits = &legacy_base_port_ops,
525 .set_piomode = opti82c611a_set_piomode,
531 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
532 * version is dual channel but doesn't have a lot of unique registers.
535 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
537 u8 active, recover, setup;
539 struct ata_device *pair = ata_dev_pair(adev);
541 int khz[4] = { 50000, 40000, 33000, 25000 };
546 sysclk = (opti_syscfg(0xAC) & 0xC0) >> 6; /* BIOS set */
548 /* Enter configuration mode */
549 ioread16(ap->ioaddr.error_addr);
550 ioread16(ap->ioaddr.error_addr);
551 iowrite8(3, ap->ioaddr.nsect_addr);
553 /* Read VLB clock strapping */
554 clock = 1000000000 / khz[sysclk];
556 /* Get the timing data in cycles */
557 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
559 /* Setup timing is shared */
561 struct ata_timing tp;
562 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
564 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
567 active = clamp_val(t.active, 2, 17) - 2;
568 recover = clamp_val(t.recover, 1, 16) - 1;
569 setup = clamp_val(t.setup, 1, 4) - 1;
571 /* Select the right timing bank for write timing */
572 rc = ioread8(ap->ioaddr.lbal_addr);
574 rc |= (adev->devno << 7);
575 iowrite8(rc, ap->ioaddr.lbal_addr);
577 /* Write the timings */
578 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
580 /* Select the right bank for read timings, also
581 load the shared timings for address */
582 rc = ioread8(ap->ioaddr.device_addr);
584 rc |= adev->devno; /* Index select */
585 rc |= (setup << 4) | 0x04;
586 iowrite8(rc, ap->ioaddr.device_addr);
588 /* Load the read timings */
589 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
591 /* Ensure the timing register mode is right */
592 rc = ioread8(ap->ioaddr.lbal_addr);
595 iowrite8(rc, ap->ioaddr.lbal_addr);
597 /* Exit command mode */
598 iowrite8(0x83, ap->ioaddr.nsect_addr);
600 /* We need to know this for quad device on the MVB */
601 ap->host->private_data = ap;
605 * opt82c465mv_qc_issue - command issue
606 * @qc: command pending
608 * Called when the libata layer is about to issue a command. We wrap
609 * this interface so that we can load the correct ATA timings. The
610 * MVB has a single set of timing registers and these are shared
611 * across channels. As there are two registers we really ought to
612 * track the last two used values as a sort of register window. For
613 * now we just reload on a channel switch. On the single channel
614 * setup this condition never fires so we do nothing extra.
616 * FIXME: dual channel needs ->serialize support
619 static unsigned int opti82c46x_qc_issue(struct ata_queued_cmd *qc)
621 struct ata_port *ap = qc->ap;
622 struct ata_device *adev = qc->dev;
624 /* If timings are set and for the wrong channel (2nd test is
625 due to a libata shortcoming and will eventually go I hope) */
626 if (ap->host->private_data != ap->host
627 && ap->host->private_data != NULL)
628 opti82c46x_set_piomode(ap, adev);
630 return ata_sff_qc_issue(qc);
633 static struct ata_port_operations opti82c46x_port_ops = {
634 .inherits = &legacy_base_port_ops,
635 .set_piomode = opti82c46x_set_piomode,
636 .qc_issue = opti82c46x_qc_issue,
640 * qdi65x0_set_piomode - PIO setup for QDI65x0
644 * In single channel mode the 6580 has one clock per device and we can
645 * avoid the requirement to clock switch. We also have to load the timing
646 * into the right clock according to whether we are master or slave.
648 * In dual channel mode the 6580 has one clock per channel and we have
649 * to software clockswitch in qc_issue.
652 static void qdi65x0_set_piomode(struct ata_port *ap, struct ata_device *adev)
655 struct legacy_data *ld_qdi = ap->host->private_data;
656 int active, recovery;
659 /* Get the timing data in cycles */
660 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
663 active = 8 - clamp_val(t.active, 1, 8);
664 recovery = 18 - clamp_val(t.recover, 3, 18);
666 active = 9 - clamp_val(t.active, 2, 9);
667 recovery = 15 - clamp_val(t.recover, 0, 15);
669 timing = (recovery << 4) | active | 0x08;
670 ld_qdi->clock[adev->devno] = timing;
672 if (ld_qdi->type == QDI6580)
673 outb(timing, ld_qdi->timing + 2 * adev->devno);
675 outb(timing, ld_qdi->timing + 2 * ap->port_no);
678 if (ld_qdi->type != QDI6500 && adev->class != ATA_DEV_ATA)
679 outb(0x5F, (ld_qdi->timing & 0xFFF0) + 3);
683 * qdi_qc_issue - command issue
684 * @qc: command pending
686 * Called when the libata layer is about to issue a command. We wrap
687 * this interface so that we can load the correct ATA timings.
690 static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc)
692 struct ata_port *ap = qc->ap;
693 struct ata_device *adev = qc->dev;
694 struct legacy_data *ld_qdi = ap->host->private_data;
696 if (ld_qdi->clock[adev->devno] != ld_qdi->last) {
697 if (adev->pio_mode) {
698 ld_qdi->last = ld_qdi->clock[adev->devno];
699 outb(ld_qdi->clock[adev->devno], ld_qdi->timing +
703 return ata_sff_qc_issue(qc);
706 static unsigned int vlb32_data_xfer(struct ata_queued_cmd *qc,
708 unsigned int buflen, int rw)
710 struct ata_device *adev = qc->dev;
711 struct ata_port *ap = adev->link->ap;
712 int slop = buflen & 3;
714 if (ata_id_has_dword_io(adev->id) && (slop == 0 || slop == 3)
715 && (ap->pflags & ATA_PFLAG_PIO32)) {
717 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
719 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
721 if (unlikely(slop)) {
724 memcpy(&pad, buf + buflen - slop, slop);
725 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
727 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
728 memcpy(buf + buflen - slop, &pad, slop);
731 return (buflen + 3) & ~3;
733 return ata_sff_data_xfer(qc, buf, buflen, rw);
736 static int qdi_port(struct platform_device *dev,
737 struct legacy_probe *lp, struct legacy_data *ld)
739 if (devm_request_region(&dev->dev, lp->private, 4, "qdi") == NULL)
741 ld->timing = lp->private;
745 static struct ata_port_operations qdi6500_port_ops = {
746 .inherits = &legacy_base_port_ops,
747 .set_piomode = qdi65x0_set_piomode,
748 .qc_issue = qdi_qc_issue,
749 .sff_data_xfer = vlb32_data_xfer,
752 static struct ata_port_operations qdi6580_port_ops = {
753 .inherits = &legacy_base_port_ops,
754 .set_piomode = qdi65x0_set_piomode,
755 .sff_data_xfer = vlb32_data_xfer,
758 static struct ata_port_operations qdi6580dp_port_ops = {
759 .inherits = &legacy_base_port_ops,
760 .set_piomode = qdi65x0_set_piomode,
761 .qc_issue = qdi_qc_issue,
762 .sff_data_xfer = vlb32_data_xfer,
765 static DEFINE_SPINLOCK(winbond_lock);
767 static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
770 spin_lock_irqsave(&winbond_lock, flags);
771 outb(reg, port + 0x01);
772 outb(val, port + 0x02);
773 spin_unlock_irqrestore(&winbond_lock, flags);
776 static u8 winbond_readcfg(unsigned long port, u8 reg)
781 spin_lock_irqsave(&winbond_lock, flags);
782 outb(reg, port + 0x01);
783 val = inb(port + 0x02);
784 spin_unlock_irqrestore(&winbond_lock, flags);
789 static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
792 struct legacy_data *ld_winbond = ap->host->private_data;
793 int active, recovery;
795 int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
797 reg = winbond_readcfg(ld_winbond->timing, 0x81);
799 /* Get the timing data in cycles */
800 if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
801 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
803 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
805 active = (clamp_val(t.active, 3, 17) - 1) & 0x0F;
806 recovery = (clamp_val(t.recover, 1, 15) + 1) & 0x0F;
807 timing = (active << 4) | recovery;
808 winbond_writecfg(ld_winbond->timing, timing, reg);
810 /* Load the setup timing */
813 if (adev->class != ATA_DEV_ATA)
814 reg |= 0x08; /* FIFO off */
815 if (!ata_pio_need_iordy(adev))
816 reg |= 0x02; /* IORDY off */
817 reg |= (clamp_val(t.setup, 0, 3) << 6);
818 winbond_writecfg(ld_winbond->timing, timing + 1, reg);
821 static int winbond_port(struct platform_device *dev,
822 struct legacy_probe *lp, struct legacy_data *ld)
824 if (devm_request_region(&dev->dev, lp->private, 4, "winbond") == NULL)
826 ld->timing = lp->private;
830 static struct ata_port_operations winbond_port_ops = {
831 .inherits = &legacy_base_port_ops,
832 .set_piomode = winbond_set_piomode,
833 .sff_data_xfer = vlb32_data_xfer,
836 static struct legacy_controller controllers[] = {
837 {"BIOS", &legacy_port_ops, ATA_PIO4,
838 ATA_FLAG_NO_IORDY, 0, NULL },
839 {"Snooping", &simple_port_ops, ATA_PIO4,
841 {"PDC20230", &pdc20230_port_ops, ATA_PIO2,
843 ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, NULL },
844 {"HT6560A", &ht6560a_port_ops, ATA_PIO2,
845 ATA_FLAG_NO_IORDY, 0, NULL },
846 {"HT6560B", &ht6560b_port_ops, ATA_PIO4,
847 ATA_FLAG_NO_IORDY, 0, NULL },
848 {"OPTI82C611A", &opti82c611a_port_ops, ATA_PIO3,
850 {"OPTI82C46X", &opti82c46x_port_ops, ATA_PIO3,
852 {"QDI6500", &qdi6500_port_ops, ATA_PIO2,
854 ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port },
855 {"QDI6580", &qdi6580_port_ops, ATA_PIO4,
856 0, ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port },
857 {"QDI6580DP", &qdi6580dp_port_ops, ATA_PIO4,
858 0, ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE, qdi_port },
859 {"W83759A", &winbond_port_ops, ATA_PIO4,
860 0, ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE,
865 * probe_chip_type - Discover controller
866 * @probe: Probe entry to check
868 * Probe an ATA port and identify the type of controller. We don't
869 * check if the controller appears to be driveless at this point.
872 static __init int probe_chip_type(struct legacy_probe *probe)
874 int mask = 1 << probe->slot;
876 if (winbond && (probe->port == 0x1F0 || probe->port == 0x170)) {
877 u8 reg = winbond_readcfg(winbond, 0x81);
878 reg |= 0x80; /* jumpered mode off */
879 winbond_writecfg(winbond, 0x81, reg);
880 reg = winbond_readcfg(winbond, 0x83);
881 reg |= 0xF0; /* local control */
882 winbond_writecfg(winbond, 0x83, reg);
883 reg = winbond_readcfg(winbond, 0x85);
884 reg |= 0xF0; /* programmable timing */
885 winbond_writecfg(winbond, 0x85, reg);
887 reg = winbond_readcfg(winbond, 0x81);
892 if (probe->port == 0x1F0) {
894 local_irq_save(flags);
896 outb(inb(0x1F2) | 0x80, 0x1F2);
904 if ((inb(0x1F2) & 0x80) == 0) {
905 /* PDC20230c or 20630 ? */
906 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller"
910 local_irq_restore(flags);
916 if (inb(0x1F2) == 0x00)
917 printk(KERN_INFO "PDC20230-B VLB ATA "
918 "controller detected.\n");
919 local_irq_restore(flags);
928 if (opti82c611a & mask)
930 if (opti82c46x & mask)
932 if (autospeed & mask)
939 * legacy_init_one - attach a legacy interface
942 * Register an ISA bus IDE interface. Such interfaces are PIO and we
943 * assume do not support IRQ sharing.
946 static __init int legacy_init_one(struct legacy_probe *probe)
948 struct legacy_controller *controller = &controllers[probe->type];
949 int pio_modes = controller->pio_mask;
950 unsigned long io = probe->port;
951 u32 mask = (1 << probe->slot);
952 struct ata_port_operations *ops = controller->ops;
953 struct legacy_data *ld = &legacy_data[probe->slot];
954 struct ata_host *host = NULL;
956 struct platform_device *pdev;
957 struct ata_device *dev;
958 void __iomem *io_addr, *ctrl_addr;
959 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
962 iordy |= controller->flags;
964 pdev = platform_device_register_simple(DRV_NAME, probe->slot, NULL, 0);
966 return PTR_ERR(pdev);
969 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL ||
970 devm_request_region(&pdev->dev, io + 0x0206, 1,
971 "pata_legacy") == NULL)
975 io_addr = devm_ioport_map(&pdev->dev, io, 8);
976 ctrl_addr = devm_ioport_map(&pdev->dev, io + 0x0206, 1);
977 if (!io_addr || !ctrl_addr)
979 ld->type = probe->type;
980 if (controller->setup)
981 if (controller->setup(pdev, probe, ld) < 0)
983 host = ata_host_alloc(&pdev->dev, 1);
989 ap->pio_mask = pio_modes;
990 ap->flags |= ATA_FLAG_SLAVE_POSS | iordy;
991 ap->pflags |= controller->pflags;
992 ap->ioaddr.cmd_addr = io_addr;
993 ap->ioaddr.altstatus_addr = ctrl_addr;
994 ap->ioaddr.ctl_addr = ctrl_addr;
995 ata_sff_std_ports(&ap->ioaddr);
996 ap->host->private_data = ld;
998 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io, io + 0x0206);
1000 ret = ata_host_activate(host, probe->irq, ata_sff_interrupt, 0,
1004 async_synchronize_full();
1005 ld->platform_dev = pdev;
1007 /* Nothing found means we drop the port as its probably not there */
1010 ata_for_each_dev(dev, &ap->link, ALL) {
1011 if (!ata_dev_absent(dev)) {
1012 legacy_host[probe->slot] = host;
1013 ld->platform_dev = pdev;
1017 ata_host_detach(host);
1019 platform_device_unregister(pdev);
1024 * legacy_check_special_cases - ATA special cases
1025 * @p: PCI device to check
1026 * @master: set this if we find an ATA master
1027 * @master: set this if we find an ATA secondary
1029 * A small number of vendors implemented early PCI ATA interfaces
1030 * on bridge logic without the ATA interface being PCI visible.
1031 * Where we have a matching PCI driver we must skip the relevant
1032 * device here. If we don't know about it then the legacy driver
1033 * is the right driver anyway.
1036 static void __init legacy_check_special_cases(struct pci_dev *p, int *primary,
1039 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
1040 if (p->vendor == 0x1078 && p->device == 0x0000) {
1041 *primary = *secondary = 1;
1044 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
1045 if (p->vendor == 0x1078 && p->device == 0x0002) {
1046 *primary = *secondary = 1;
1049 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
1050 if (p->vendor == 0x8086 && p->device == 0x1234) {
1052 pci_read_config_word(p, 0x6C, &r);
1054 /* ATA port enabled */
1064 static __init void probe_opti_vlb(void)
1066 /* If an OPTI 82C46X is present find out where the channels are */
1067 static const char *optis[4] = {
1072 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
1074 opti82c46x = 3; /* Assume master and slave first */
1075 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n",
1078 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
1079 ctrl = opti_syscfg(0xAC);
1080 /* Check enabled and this port is the 465MV port. On the
1081 MVB we may have two channels */
1084 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1085 legacy_probe_add(0x170, 15, OPTI46X, 0);
1088 legacy_probe_add(0x170, 15, OPTI46X, 0);
1090 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1092 legacy_probe_add(0x1F0, 14, OPTI46X, 0);
1095 static __init void qdi65_identify_port(u8 r, u8 res, unsigned long port)
1097 static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
1098 /* Check card type */
1099 if ((r & 0xF0) == 0xC0) {
1100 /* QD6500: single channel */
1104 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01),
1107 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
1108 /* QD6580: dual channel */
1109 if (!request_region(port + 2 , 2, "pata_qdi")) {
1110 release_region(port, 2);
1113 res = inb(port + 3);
1114 /* Single channel mode ? */
1116 legacy_probe_add(ide_port[r & 0x01], 14 + (r & 0x01),
1118 else { /* Dual channel mode */
1119 legacy_probe_add(0x1F0, 14, QDI6580DP, port);
1120 /* port + 0x02, r & 0x04 */
1121 legacy_probe_add(0x170, 15, QDI6580DP, port + 2);
1123 release_region(port + 2, 2);
1127 static __init void probe_qdi_vlb(void)
1129 unsigned long flags;
1130 static const unsigned long qd_port[2] = { 0x30, 0xB0 };
1134 * Check each possible QD65xx base address
1137 for (i = 0; i < 2; i++) {
1138 unsigned long port = qd_port[i];
1142 if (request_region(port, 2, "pata_qdi")) {
1143 /* Check for a card */
1144 local_irq_save(flags);
1145 /* I have no h/w that needs this delay but it
1146 is present in the historic code */
1155 local_irq_restore(flags);
1159 release_region(port, 2);
1162 /* Passes the presence test */
1165 /* Check port agrees with port set */
1166 if ((r & 2) >> 1 == i)
1167 qdi65_identify_port(r, res, port);
1168 release_region(port, 2);
1174 * legacy_init - attach legacy interfaces
1176 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
1177 * Right now we do not scan the ide0 and ide1 address but should do so
1178 * for non PCI systems or systems with no PCI IDE legacy mode devices.
1179 * If you fix that note there are special cases to consider like VLB
1180 * drivers and CS5510/20.
1183 static __init int legacy_init(void)
1189 int pci_present = 0;
1190 struct legacy_probe *pl = &probe_list[0];
1193 struct pci_dev *p = NULL;
1195 for_each_pci_dev(p) {
1197 /* Check for any overlap of the system ATA mappings. Native
1198 mode controllers stuck on these addresses or some devices
1199 in 'raid' mode won't be found by the storage class test */
1200 for (r = 0; r < 6; r++) {
1201 if (pci_resource_start(p, r) == 0x1f0)
1203 if (pci_resource_start(p, r) == 0x170)
1206 /* Check for special cases */
1207 legacy_check_special_cases(p, &primary, &secondary);
1209 /* If PCI bus is present then don't probe for tertiary
1215 winbond = 0x130; /* Default port, alt is 1B0 */
1217 if (primary == 0 || all)
1218 legacy_probe_add(0x1F0, 14, UNKNOWN, 0);
1219 if (secondary == 0 || all)
1220 legacy_probe_add(0x170, 15, UNKNOWN, 0);
1222 if (probe_all || !pci_present) {
1223 /* ISA/VLB extra ports */
1224 legacy_probe_add(0x1E8, 11, UNKNOWN, 0);
1225 legacy_probe_add(0x168, 10, UNKNOWN, 0);
1226 legacy_probe_add(0x1E0, 8, UNKNOWN, 0);
1227 legacy_probe_add(0x160, 12, UNKNOWN, 0);
1235 for (i = 0; i < NR_HOST; i++, pl++) {
1238 if (pl->type == UNKNOWN)
1239 pl->type = probe_chip_type(pl);
1241 if (legacy_init_one(pl) == 0)
1249 static __exit void legacy_exit(void)
1253 for (i = 0; i < nr_legacy_host; i++) {
1254 struct legacy_data *ld = &legacy_data[i];
1255 ata_host_detach(legacy_host[i]);
1256 platform_device_unregister(ld->platform_dev);
1260 MODULE_AUTHOR("Alan Cox");
1261 MODULE_DESCRIPTION("low-level driver for legacy ATA");
1262 MODULE_LICENSE("GPL");
1263 MODULE_VERSION(DRV_VERSION);
1264 MODULE_ALIAS("pata_qdi");
1265 MODULE_ALIAS("pata_winbond");
1267 module_param(probe_all, int, 0);
1268 module_param(autospeed, int, 0);
1269 module_param(ht6560a, int, 0);
1270 module_param(ht6560b, int, 0);
1271 module_param(opti82c611a, int, 0);
1272 module_param(opti82c46x, int, 0);
1273 module_param(qdi, int, 0);
1274 module_param(winbond, int, 0);
1275 module_param(pio_mask, int, 0);
1276 module_param(iordy_mask, int, 0);
1278 module_init(legacy_init);
1279 module_exit(legacy_exit);