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
33 * This driver handles legacy (that is "ISA/VLB side") IDE ports found
34 * on PC class systems. There are three hybrid devices that are exceptions
35 * The Cyrix 5510/5520 where a pre SFF ATA device is on the bridge and
36 * the MPIIX where the tuning is PCI side but the IDE is "ISA side".
38 * Specific support is included for the ht6560a/ht6560b/opti82c611a/
39 * opti82c465mv/promise 20230c/20630
41 * Use the autospeed and pio_mask options with:
42 * Appian ADI/2 aka CLPD7220 or AIC25VL01.
43 * Use the jumpers, autospeed and set pio_mask to the mode on the jumpers with
44 * Goldstar GM82C711, PIC-1288A-125, UMC 82C871F, Winbond W83759,
45 * Winbond W83759A, Promise PDC20230-B
47 * For now use autospeed and pio_mask as above with the W83759A. This may
51 * Merge existing pata_qdi driver
55 #include <linux/kernel.h>
56 #include <linux/module.h>
57 #include <linux/pci.h>
58 #include <linux/init.h>
59 #include <linux/blkdev.h>
60 #include <linux/delay.h>
61 #include <scsi/scsi_host.h>
62 #include <linux/ata.h>
63 #include <linux/libata.h>
64 #include <linux/platform_device.h>
66 #define DRV_NAME "pata_legacy"
67 #define DRV_VERSION "0.5.4"
71 static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
72 static int legacy_irq[NR_HOST] = { 15, 14, 11, 10, 8, 12 };
79 struct platform_device *platform_dev;
83 static struct legacy_data legacy_data[NR_HOST];
84 static struct ata_host *legacy_host[NR_HOST];
85 static int nr_legacy_host;
88 static int probe_all; /* Set to check all ISA port ranges */
89 static int ht6560a; /* HT 6560A on primary 1, secondary 2, both 3 */
90 static int ht6560b; /* HT 6560A on primary 1, secondary 2, both 3 */
91 static int opti82c611a; /* Opti82c611A on primary 1, secondary 2, both 3 */
92 static int opti82c46x; /* Opti 82c465MV present (pri/sec autodetect) */
93 static int autospeed; /* Chip present which snoops speed changes */
94 static int pio_mask = 0x1F; /* PIO range for autospeed devices */
95 static int iordy_mask = 0xFFFFFFFF; /* Use iordy if available */
98 * legacy_set_mode - mode setting
100 * @unused: Device that failed when error is returned
102 * Use a non standard set_mode function. We don't want to be tuned.
104 * The BIOS configured everything. Our job is not to fiddle. Just use
105 * whatever PIO the hardware is using and leave it at that. When we
106 * get some kind of nice user driven API for control then we can
107 * expand on this as per hdparm in the base kernel.
110 static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
114 for (i = 0; i < ATA_MAX_DEVICES; i++) {
115 struct ata_device *dev = &ap->device[i];
116 if (ata_dev_enabled(dev)) {
117 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
118 dev->pio_mode = XFER_PIO_0;
119 dev->xfer_mode = XFER_PIO_0;
120 dev->xfer_shift = ATA_SHIFT_PIO;
121 dev->flags |= ATA_DFLAG_PIO;
127 static struct scsi_host_template legacy_sht = {
128 .module = THIS_MODULE,
130 .ioctl = ata_scsi_ioctl,
131 .queuecommand = ata_scsi_queuecmd,
132 .can_queue = ATA_DEF_QUEUE,
133 .this_id = ATA_SHT_THIS_ID,
134 .sg_tablesize = LIBATA_MAX_PRD,
135 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
136 .emulated = ATA_SHT_EMULATED,
137 .use_clustering = ATA_SHT_USE_CLUSTERING,
138 .proc_name = DRV_NAME,
139 .dma_boundary = ATA_DMA_BOUNDARY,
140 .slave_configure = ata_scsi_slave_config,
141 .slave_destroy = ata_scsi_slave_destroy,
142 .bios_param = ata_std_bios_param,
146 * These ops are used if the user indicates the hardware
147 * snoops the commands to decide on the mode and handles the
148 * mode selection "magically" itself. Several legacy controllers
149 * do this. The mode range can be set if it is not 0x1F by setting
153 static struct ata_port_operations simple_port_ops = {
154 .port_disable = ata_port_disable,
155 .tf_load = ata_tf_load,
156 .tf_read = ata_tf_read,
157 .check_status = ata_check_status,
158 .exec_command = ata_exec_command,
159 .dev_select = ata_std_dev_select,
161 .freeze = ata_bmdma_freeze,
162 .thaw = ata_bmdma_thaw,
163 .error_handler = ata_bmdma_error_handler,
164 .post_internal_cmd = ata_bmdma_post_internal_cmd,
166 .qc_prep = ata_qc_prep,
167 .qc_issue = ata_qc_issue_prot,
169 .data_xfer = ata_data_xfer_noirq,
171 .irq_handler = ata_interrupt,
172 .irq_clear = ata_bmdma_irq_clear,
173 .irq_on = ata_irq_on,
174 .irq_ack = ata_irq_ack,
176 .port_start = ata_port_start,
179 static struct ata_port_operations legacy_port_ops = {
180 .set_mode = legacy_set_mode,
182 .port_disable = ata_port_disable,
183 .tf_load = ata_tf_load,
184 .tf_read = ata_tf_read,
185 .check_status = ata_check_status,
186 .exec_command = ata_exec_command,
187 .dev_select = ata_std_dev_select,
189 .error_handler = ata_bmdma_error_handler,
191 .qc_prep = ata_qc_prep,
192 .qc_issue = ata_qc_issue_prot,
194 .data_xfer = ata_data_xfer_noirq,
196 .irq_handler = ata_interrupt,
197 .irq_clear = ata_bmdma_irq_clear,
198 .irq_on = ata_irq_on,
199 .irq_ack = ata_irq_ack,
201 .port_start = ata_port_start,
205 * Promise 20230C and 20620 support
207 * This controller supports PIO0 to PIO2. We set PIO timings conservatively to
208 * allow for 50MHz Vesa Local Bus. The 20620 DMA support is weird being DMA to
209 * controller and PIO'd to the host and not supported.
212 static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
215 int pio = adev->pio_mode - XFER_PIO_0;
219 /* Safe as UP only. Force I/Os to occur together */
221 local_irq_save(flags);
223 /* Unlock the control interface */
227 outb(inb(0x1F2) | 0x80, 0x1F2);
234 while((inb(0x1F2) & 0x80) && --tries);
236 local_irq_restore(flags);
238 outb(inb(0x1F4) & 0x07, 0x1F4);
241 rt &= 0x07 << (3 * adev->devno);
243 rt |= (1 + 3 * pio) << (3 * adev->devno);
246 outb(inb(0x1F2) | 0x01, 0x1F2);
252 static void pdc_data_xfer_vlb(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
254 struct ata_port *ap = adev->ap;
255 int slop = buflen & 3;
258 if (ata_id_has_dword_io(adev->id)) {
259 local_irq_save(flags);
261 /* Perform the 32bit I/O synchronization sequence */
262 ioread8(ap->ioaddr.nsect_addr);
263 ioread8(ap->ioaddr.nsect_addr);
264 ioread8(ap->ioaddr.nsect_addr);
269 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
271 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
273 if (unlikely(slop)) {
276 memcpy(&pad, buf + buflen - slop, slop);
277 pad = le32_to_cpu(pad);
278 iowrite32(pad, ap->ioaddr.data_addr);
280 pad = ioread32(ap->ioaddr.data_addr);
281 pad = cpu_to_le16(pad);
282 memcpy(buf + buflen - slop, &pad, slop);
285 local_irq_restore(flags);
288 ata_data_xfer_noirq(adev, buf, buflen, write_data);
291 static struct ata_port_operations pdc20230_port_ops = {
292 .set_piomode = pdc20230_set_piomode,
294 .port_disable = ata_port_disable,
295 .tf_load = ata_tf_load,
296 .tf_read = ata_tf_read,
297 .check_status = ata_check_status,
298 .exec_command = ata_exec_command,
299 .dev_select = ata_std_dev_select,
301 .error_handler = ata_bmdma_error_handler,
303 .qc_prep = ata_qc_prep,
304 .qc_issue = ata_qc_issue_prot,
306 .data_xfer = pdc_data_xfer_vlb,
308 .irq_handler = ata_interrupt,
309 .irq_clear = ata_bmdma_irq_clear,
310 .irq_on = ata_irq_on,
311 .irq_ack = ata_irq_ack,
313 .port_start = ata_port_start,
317 * Holtek 6560A support
319 * This controller supports PIO0 to PIO2 (no IORDY even though higher timings
323 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
328 /* Get the timing data in cycles. For now play safe at 50Mhz */
329 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
331 active = FIT(t.active, 2, 15);
332 recover = FIT(t.recover, 4, 15);
339 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
340 ioread8(ap->ioaddr.status_addr);
343 static struct ata_port_operations ht6560a_port_ops = {
344 .set_piomode = ht6560a_set_piomode,
346 .port_disable = ata_port_disable,
347 .tf_load = ata_tf_load,
348 .tf_read = ata_tf_read,
349 .check_status = ata_check_status,
350 .exec_command = ata_exec_command,
351 .dev_select = ata_std_dev_select,
353 .error_handler = ata_bmdma_error_handler,
355 .qc_prep = ata_qc_prep,
356 .qc_issue = ata_qc_issue_prot,
358 .data_xfer = ata_data_xfer, /* Check vlb/noirq */
360 .irq_handler = ata_interrupt,
361 .irq_clear = ata_bmdma_irq_clear,
362 .irq_on = ata_irq_on,
363 .irq_ack = ata_irq_ack,
365 .port_start = ata_port_start,
369 * Holtek 6560B support
371 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO setting
372 * unless we see an ATAPI device in which case we force it off.
374 * FIXME: need to implement 2nd channel support.
377 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
382 /* Get the timing data in cycles. For now play safe at 50Mhz */
383 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
385 active = FIT(t.active, 2, 15);
386 recover = FIT(t.recover, 2, 16);
394 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
396 if (adev->class != ATA_DEV_ATA) {
397 u8 rconf = inb(0x3E6);
403 ioread8(ap->ioaddr.status_addr);
406 static struct ata_port_operations ht6560b_port_ops = {
407 .set_piomode = ht6560b_set_piomode,
409 .port_disable = ata_port_disable,
410 .tf_load = ata_tf_load,
411 .tf_read = ata_tf_read,
412 .check_status = ata_check_status,
413 .exec_command = ata_exec_command,
414 .dev_select = ata_std_dev_select,
416 .error_handler = ata_bmdma_error_handler,
418 .qc_prep = ata_qc_prep,
419 .qc_issue = ata_qc_issue_prot,
421 .data_xfer = ata_data_xfer, /* FIXME: Check 32bit and noirq */
423 .irq_handler = ata_interrupt,
424 .irq_clear = ata_bmdma_irq_clear,
425 .irq_on = ata_irq_on,
426 .irq_ack = ata_irq_ack,
428 .port_start = ata_port_start,
432 * Opti core chipset helpers
436 * opti_syscfg - read OPTI chipset configuration
437 * @reg: Configuration register to read
439 * Returns the value of an OPTI system board configuration register.
442 static u8 opti_syscfg(u8 reg)
447 /* Uniprocessor chipset and must force cycles adjancent */
448 local_irq_save(flags);
451 local_irq_restore(flags);
458 * This controller supports PIO0 to PIO3.
461 static void opti82c611a_set_piomode(struct ata_port *ap, struct ata_device *adev)
463 u8 active, recover, setup;
465 struct ata_device *pair = ata_dev_pair(adev);
467 int khz[4] = { 50000, 40000, 33000, 25000 };
470 /* Enter configuration mode */
471 ioread16(ap->ioaddr.error_addr);
472 ioread16(ap->ioaddr.error_addr);
473 iowrite8(3, ap->ioaddr.nsect_addr);
475 /* Read VLB clock strapping */
476 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
478 /* Get the timing data in cycles */
479 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
481 /* Setup timing is shared */
483 struct ata_timing tp;
484 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
486 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
489 active = FIT(t.active, 2, 17) - 2;
490 recover = FIT(t.recover, 1, 16) - 1;
491 setup = FIT(t.setup, 1, 4) - 1;
493 /* Select the right timing bank for write timing */
494 rc = ioread8(ap->ioaddr.lbal_addr);
496 rc |= (adev->devno << 7);
497 iowrite8(rc, ap->ioaddr.lbal_addr);
499 /* Write the timings */
500 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
502 /* Select the right bank for read timings, also
503 load the shared timings for address */
504 rc = ioread8(ap->ioaddr.device_addr);
506 rc |= adev->devno; /* Index select */
507 rc |= (setup << 4) | 0x04;
508 iowrite8(rc, ap->ioaddr.device_addr);
510 /* Load the read timings */
511 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
513 /* Ensure the timing register mode is right */
514 rc = ioread8(ap->ioaddr.lbal_addr);
517 iowrite8(rc, ap->ioaddr.lbal_addr);
519 /* Exit command mode */
520 iowrite8(0x83, ap->ioaddr.nsect_addr);
524 static struct ata_port_operations opti82c611a_port_ops = {
525 .set_piomode = opti82c611a_set_piomode,
527 .port_disable = ata_port_disable,
528 .tf_load = ata_tf_load,
529 .tf_read = ata_tf_read,
530 .check_status = ata_check_status,
531 .exec_command = ata_exec_command,
532 .dev_select = ata_std_dev_select,
534 .error_handler = ata_bmdma_error_handler,
536 .qc_prep = ata_qc_prep,
537 .qc_issue = ata_qc_issue_prot,
539 .data_xfer = ata_data_xfer,
541 .irq_handler = ata_interrupt,
542 .irq_clear = ata_bmdma_irq_clear,
543 .irq_on = ata_irq_on,
544 .irq_ack = ata_irq_ack,
546 .port_start = ata_port_start,
552 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
553 * version is dual channel but doesn't have a lot of unique registers.
556 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
558 u8 active, recover, setup;
560 struct ata_device *pair = ata_dev_pair(adev);
562 int khz[4] = { 50000, 40000, 33000, 25000 };
567 sysclk = opti_syscfg(0xAC) & 0xC0; /* BIOS set */
569 /* Enter configuration mode */
570 ioread16(ap->ioaddr.error_addr);
571 ioread16(ap->ioaddr.error_addr);
572 iowrite8(3, ap->ioaddr.nsect_addr);
574 /* Read VLB clock strapping */
575 clock = 1000000000 / khz[sysclk];
577 /* Get the timing data in cycles */
578 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
580 /* Setup timing is shared */
582 struct ata_timing tp;
583 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
585 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
588 active = FIT(t.active, 2, 17) - 2;
589 recover = FIT(t.recover, 1, 16) - 1;
590 setup = FIT(t.setup, 1, 4) - 1;
592 /* Select the right timing bank for write timing */
593 rc = ioread8(ap->ioaddr.lbal_addr);
595 rc |= (adev->devno << 7);
596 iowrite8(rc, ap->ioaddr.lbal_addr);
598 /* Write the timings */
599 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
601 /* Select the right bank for read timings, also
602 load the shared timings for address */
603 rc = ioread8(ap->ioaddr.device_addr);
605 rc |= adev->devno; /* Index select */
606 rc |= (setup << 4) | 0x04;
607 iowrite8(rc, ap->ioaddr.device_addr);
609 /* Load the read timings */
610 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
612 /* Ensure the timing register mode is right */
613 rc = ioread8(ap->ioaddr.lbal_addr);
616 iowrite8(rc, ap->ioaddr.lbal_addr);
618 /* Exit command mode */
619 iowrite8(0x83, ap->ioaddr.nsect_addr);
621 /* We need to know this for quad device on the MVB */
622 ap->host->private_data = ap;
626 * opt82c465mv_qc_issue_prot - command issue
627 * @qc: command pending
629 * Called when the libata layer is about to issue a command. We wrap
630 * this interface so that we can load the correct ATA timings. The
631 * MVB has a single set of timing registers and these are shared
632 * across channels. As there are two registers we really ought to
633 * track the last two used values as a sort of register window. For
634 * now we just reload on a channel switch. On the single channel
635 * setup this condition never fires so we do nothing extra.
637 * FIXME: dual channel needs ->serialize support
640 static unsigned int opti82c46x_qc_issue_prot(struct ata_queued_cmd *qc)
642 struct ata_port *ap = qc->ap;
643 struct ata_device *adev = qc->dev;
645 /* If timings are set and for the wrong channel (2nd test is
646 due to a libata shortcoming and will eventually go I hope) */
647 if (ap->host->private_data != ap->host
648 && ap->host->private_data != NULL)
649 opti82c46x_set_piomode(ap, adev);
651 return ata_qc_issue_prot(qc);
654 static struct ata_port_operations opti82c46x_port_ops = {
655 .set_piomode = opti82c46x_set_piomode,
657 .port_disable = ata_port_disable,
658 .tf_load = ata_tf_load,
659 .tf_read = ata_tf_read,
660 .check_status = ata_check_status,
661 .exec_command = ata_exec_command,
662 .dev_select = ata_std_dev_select,
664 .error_handler = ata_bmdma_error_handler,
666 .qc_prep = ata_qc_prep,
667 .qc_issue = opti82c46x_qc_issue_prot,
669 .data_xfer = ata_data_xfer,
671 .irq_handler = ata_interrupt,
672 .irq_clear = ata_bmdma_irq_clear,
673 .irq_on = ata_irq_on,
674 .irq_ack = ata_irq_ack,
676 .port_start = ata_port_start,
681 * legacy_init_one - attach a legacy interface
683 * @io: I/O port start
684 * @ctrl: control port
685 * @irq: interrupt line
687 * Register an ISA bus IDE interface. Such interfaces are PIO and we
688 * assume do not support IRQ sharing.
691 static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl, int irq)
693 struct legacy_data *ld = &legacy_data[nr_legacy_host];
694 struct ata_probe_ent ae;
695 struct platform_device *pdev;
696 struct ata_port_operations *ops = &legacy_port_ops;
697 void __iomem *io_addr, *ctrl_addr;
698 int pio_modes = pio_mask;
699 u32 mask = (1 << port);
700 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
703 pdev = platform_device_register_simple(DRV_NAME, nr_legacy_host, NULL, 0);
705 return PTR_ERR(pdev);
708 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL ||
709 devm_request_region(&pdev->dev, ctrl, 1, "pata_legacy") == NULL)
713 io_addr = devm_ioport_map(&pdev->dev, io, 8);
714 ctrl_addr = devm_ioport_map(&pdev->dev, ctrl, 1);
715 if (!io_addr || !ctrl_addr)
718 if (ht6560a & mask) {
719 ops = &ht6560a_port_ops;
721 iordy = ATA_FLAG_NO_IORDY;
723 if (ht6560b & mask) {
724 ops = &ht6560b_port_ops;
727 if (opti82c611a & mask) {
728 ops = &opti82c611a_port_ops;
731 if (opti82c46x & mask) {
732 ops = &opti82c46x_port_ops;
736 /* Probe for automatically detectable controllers */
738 if (io == 0x1F0 && ops == &legacy_port_ops) {
741 local_irq_save(flags);
745 outb(inb(0x1F2) | 0x80, 0x1F2);
752 if ((inb(0x1F2) & 0x80) == 0) {
753 /* PDC20230c or 20630 ? */
754 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller detected.\n");
756 ops = &pdc20230_port_ops;
757 iordy = ATA_FLAG_NO_IORDY;
764 if (inb(0x1F2) == 0x00) {
765 printk(KERN_INFO "PDC20230-B VLB ATA controller detected.\n");
768 local_irq_restore(flags);
772 /* Chip does mode setting by command snooping */
773 if (ops == &legacy_port_ops && (autospeed & mask))
774 ops = &simple_port_ops;
776 memset(&ae, 0, sizeof(struct ata_probe_ent));
777 INIT_LIST_HEAD(&ae.node);
780 ae.sht = &legacy_sht;
782 ae.pio_mask = pio_modes;
785 ae.port_flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST|iordy;
786 ae.port[0].cmd_addr = io_addr;
787 ae.port[0].altstatus_addr = ctrl_addr;
788 ae.port[0].ctl_addr = ctrl_addr;
789 ata_std_ports(&ae.port[0]);
790 ae.private_data = ld;
793 if (!ata_device_add(&ae))
796 legacy_host[nr_legacy_host++] = dev_get_drvdata(&pdev->dev);
797 ld->platform_dev = pdev;
801 platform_device_unregister(pdev);
806 * legacy_check_special_cases - ATA special cases
807 * @p: PCI device to check
808 * @master: set this if we find an ATA master
809 * @master: set this if we find an ATA secondary
811 * A small number of vendors implemented early PCI ATA interfaces on bridge logic
812 * without the ATA interface being PCI visible. Where we have a matching PCI driver
813 * we must skip the relevant device here. If we don't know about it then the legacy
814 * driver is the right driver anyway.
817 static void legacy_check_special_cases(struct pci_dev *p, int *primary, int *secondary)
819 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
820 if (p->vendor == 0x1078 && p->device == 0x0000) {
821 *primary = *secondary = 1;
824 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
825 if (p->vendor == 0x1078 && p->device == 0x0002) {
826 *primary = *secondary = 1;
829 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
830 if (p->vendor == 0x8086 && p->device == 0x1234) {
832 pci_read_config_word(p, 0x6C, &r);
833 if (r & 0x8000) { /* ATA port enabled */
845 * legacy_init - attach legacy interfaces
847 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
848 * Right now we do not scan the ide0 and ide1 address but should do so
849 * for non PCI systems or systems with no PCI IDE legacy mode devices.
850 * If you fix that note there are special cases to consider like VLB
851 * drivers and CS5510/20.
854 static __init int legacy_init(void)
860 int last_port = NR_HOST;
862 struct pci_dev *p = NULL;
864 for_each_pci_dev(p) {
866 /* Check for any overlap of the system ATA mappings. Native mode controllers
867 stuck on these addresses or some devices in 'raid' mode won't be found by
868 the storage class test */
869 for (r = 0; r < 6; r++) {
870 if (pci_resource_start(p, r) == 0x1f0)
872 if (pci_resource_start(p, r) == 0x170)
875 /* Check for special cases */
876 legacy_check_special_cases(p, &primary, &secondary);
878 /* If PCI bus is present then don't probe for tertiary legacy ports */
883 /* If an OPTI 82C46X is present find out where the channels are */
885 static const char *optis[4] = {
890 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
892 opti82c46x = 3; /* Assume master and slave first */
893 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n", optis[ctrl]);
895 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
896 ctrl = opti_syscfg(0xAC);
897 /* Check enabled and this port is the 465MV port. On the
898 MVB we may have two channels */
901 opti82c46x = 2; /* Slave */
903 opti82c46x = 1; /* Master */
905 opti82c46x = 3; /* Master and Slave */
911 for (i = 0; i < last_port; i++) {
912 /* Skip primary if we have seen a PCI one */
913 if (i == 0 && primary == 1)
915 /* Skip secondary if we have seen a PCI one */
916 if (i == 1 && secondary == 1)
918 if (legacy_init_one(i, legacy_port[i],
919 legacy_port[i] + 0x0206,
928 static __exit void legacy_exit(void)
932 for (i = 0; i < nr_legacy_host; i++) {
933 struct legacy_data *ld = &legacy_data[i];
935 ata_host_detach(legacy_host[i]);
936 platform_device_unregister(ld->platform_dev);
938 release_region(ld->timing, 2);
942 MODULE_AUTHOR("Alan Cox");
943 MODULE_DESCRIPTION("low-level driver for legacy ATA");
944 MODULE_LICENSE("GPL");
945 MODULE_VERSION(DRV_VERSION);
947 module_param(probe_all, int, 0);
948 module_param(autospeed, int, 0);
949 module_param(ht6560a, int, 0);
950 module_param(ht6560b, int, 0);
951 module_param(opti82c611a, int, 0);
952 module_param(opti82c46x, int, 0);
953 module_param(pio_mask, int, 0);
954 module_param(iordy_mask, int, 0);
956 module_init(legacy_init);
957 module_exit(legacy_exit);