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 .freeze = ata_bmdma_freeze,
190 .thaw = ata_bmdma_thaw,
191 .error_handler = ata_bmdma_error_handler,
192 .post_internal_cmd = ata_bmdma_post_internal_cmd,
194 .qc_prep = ata_qc_prep,
195 .qc_issue = ata_qc_issue_prot,
197 .data_xfer = ata_data_xfer_noirq,
199 .irq_handler = ata_interrupt,
200 .irq_clear = ata_bmdma_irq_clear,
201 .irq_on = ata_irq_on,
202 .irq_ack = ata_irq_ack,
204 .port_start = ata_port_start,
208 * Promise 20230C and 20620 support
210 * This controller supports PIO0 to PIO2. We set PIO timings conservatively to
211 * allow for 50MHz Vesa Local Bus. The 20620 DMA support is weird being DMA to
212 * controller and PIO'd to the host and not supported.
215 static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
218 int pio = adev->pio_mode - XFER_PIO_0;
222 /* Safe as UP only. Force I/Os to occur together */
224 local_irq_save(flags);
226 /* Unlock the control interface */
230 outb(inb(0x1F2) | 0x80, 0x1F2);
237 while((inb(0x1F2) & 0x80) && --tries);
239 local_irq_restore(flags);
241 outb(inb(0x1F4) & 0x07, 0x1F4);
244 rt &= 0x07 << (3 * adev->devno);
246 rt |= (1 + 3 * pio) << (3 * adev->devno);
249 outb(inb(0x1F2) | 0x01, 0x1F2);
255 static void pdc_data_xfer_vlb(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
257 struct ata_port *ap = adev->ap;
258 int slop = buflen & 3;
261 if (ata_id_has_dword_io(adev->id)) {
262 local_irq_save(flags);
264 /* Perform the 32bit I/O synchronization sequence */
265 ioread8(ap->ioaddr.nsect_addr);
266 ioread8(ap->ioaddr.nsect_addr);
267 ioread8(ap->ioaddr.nsect_addr);
272 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
274 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
276 if (unlikely(slop)) {
279 memcpy(&pad, buf + buflen - slop, slop);
280 pad = le32_to_cpu(pad);
281 iowrite32(pad, ap->ioaddr.data_addr);
283 pad = ioread32(ap->ioaddr.data_addr);
284 pad = cpu_to_le16(pad);
285 memcpy(buf + buflen - slop, &pad, slop);
288 local_irq_restore(flags);
291 ata_data_xfer_noirq(adev, buf, buflen, write_data);
294 static struct ata_port_operations pdc20230_port_ops = {
295 .set_piomode = pdc20230_set_piomode,
297 .port_disable = ata_port_disable,
298 .tf_load = ata_tf_load,
299 .tf_read = ata_tf_read,
300 .check_status = ata_check_status,
301 .exec_command = ata_exec_command,
302 .dev_select = ata_std_dev_select,
304 .freeze = ata_bmdma_freeze,
305 .thaw = ata_bmdma_thaw,
306 .error_handler = ata_bmdma_error_handler,
307 .post_internal_cmd = ata_bmdma_post_internal_cmd,
309 .qc_prep = ata_qc_prep,
310 .qc_issue = ata_qc_issue_prot,
312 .data_xfer = pdc_data_xfer_vlb,
314 .irq_handler = ata_interrupt,
315 .irq_clear = ata_bmdma_irq_clear,
316 .irq_on = ata_irq_on,
317 .irq_ack = ata_irq_ack,
319 .port_start = ata_port_start,
323 * Holtek 6560A support
325 * This controller supports PIO0 to PIO2 (no IORDY even though higher timings
329 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
334 /* Get the timing data in cycles. For now play safe at 50Mhz */
335 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
337 active = FIT(t.active, 2, 15);
338 recover = FIT(t.recover, 4, 15);
345 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
346 ioread8(ap->ioaddr.status_addr);
349 static struct ata_port_operations ht6560a_port_ops = {
350 .set_piomode = ht6560a_set_piomode,
352 .port_disable = ata_port_disable,
353 .tf_load = ata_tf_load,
354 .tf_read = ata_tf_read,
355 .check_status = ata_check_status,
356 .exec_command = ata_exec_command,
357 .dev_select = ata_std_dev_select,
359 .freeze = ata_bmdma_freeze,
360 .thaw = ata_bmdma_thaw,
361 .error_handler = ata_bmdma_error_handler,
362 .post_internal_cmd = ata_bmdma_post_internal_cmd,
364 .qc_prep = ata_qc_prep,
365 .qc_issue = ata_qc_issue_prot,
367 .data_xfer = ata_data_xfer, /* Check vlb/noirq */
369 .irq_handler = ata_interrupt,
370 .irq_clear = ata_bmdma_irq_clear,
371 .irq_on = ata_irq_on,
372 .irq_ack = ata_irq_ack,
374 .port_start = ata_port_start,
378 * Holtek 6560B support
380 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO setting
381 * unless we see an ATAPI device in which case we force it off.
383 * FIXME: need to implement 2nd channel support.
386 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
391 /* Get the timing data in cycles. For now play safe at 50Mhz */
392 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
394 active = FIT(t.active, 2, 15);
395 recover = FIT(t.recover, 2, 16);
403 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
405 if (adev->class != ATA_DEV_ATA) {
406 u8 rconf = inb(0x3E6);
412 ioread8(ap->ioaddr.status_addr);
415 static struct ata_port_operations ht6560b_port_ops = {
416 .set_piomode = ht6560b_set_piomode,
418 .port_disable = ata_port_disable,
419 .tf_load = ata_tf_load,
420 .tf_read = ata_tf_read,
421 .check_status = ata_check_status,
422 .exec_command = ata_exec_command,
423 .dev_select = ata_std_dev_select,
425 .freeze = ata_bmdma_freeze,
426 .thaw = ata_bmdma_thaw,
427 .error_handler = ata_bmdma_error_handler,
428 .post_internal_cmd = ata_bmdma_post_internal_cmd,
430 .qc_prep = ata_qc_prep,
431 .qc_issue = ata_qc_issue_prot,
433 .data_xfer = ata_data_xfer, /* FIXME: Check 32bit and noirq */
435 .irq_handler = ata_interrupt,
436 .irq_clear = ata_bmdma_irq_clear,
437 .irq_on = ata_irq_on,
438 .irq_ack = ata_irq_ack,
440 .port_start = ata_port_start,
444 * Opti core chipset helpers
448 * opti_syscfg - read OPTI chipset configuration
449 * @reg: Configuration register to read
451 * Returns the value of an OPTI system board configuration register.
454 static u8 opti_syscfg(u8 reg)
459 /* Uniprocessor chipset and must force cycles adjancent */
460 local_irq_save(flags);
463 local_irq_restore(flags);
470 * This controller supports PIO0 to PIO3.
473 static void opti82c611a_set_piomode(struct ata_port *ap, struct ata_device *adev)
475 u8 active, recover, setup;
477 struct ata_device *pair = ata_dev_pair(adev);
479 int khz[4] = { 50000, 40000, 33000, 25000 };
482 /* Enter configuration mode */
483 ioread16(ap->ioaddr.error_addr);
484 ioread16(ap->ioaddr.error_addr);
485 iowrite8(3, ap->ioaddr.nsect_addr);
487 /* Read VLB clock strapping */
488 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
490 /* Get the timing data in cycles */
491 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
493 /* Setup timing is shared */
495 struct ata_timing tp;
496 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
498 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
501 active = FIT(t.active, 2, 17) - 2;
502 recover = FIT(t.recover, 1, 16) - 1;
503 setup = FIT(t.setup, 1, 4) - 1;
505 /* Select the right timing bank for write timing */
506 rc = ioread8(ap->ioaddr.lbal_addr);
508 rc |= (adev->devno << 7);
509 iowrite8(rc, ap->ioaddr.lbal_addr);
511 /* Write the timings */
512 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
514 /* Select the right bank for read timings, also
515 load the shared timings for address */
516 rc = ioread8(ap->ioaddr.device_addr);
518 rc |= adev->devno; /* Index select */
519 rc |= (setup << 4) | 0x04;
520 iowrite8(rc, ap->ioaddr.device_addr);
522 /* Load the read timings */
523 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
525 /* Ensure the timing register mode is right */
526 rc = ioread8(ap->ioaddr.lbal_addr);
529 iowrite8(rc, ap->ioaddr.lbal_addr);
531 /* Exit command mode */
532 iowrite8(0x83, ap->ioaddr.nsect_addr);
536 static struct ata_port_operations opti82c611a_port_ops = {
537 .set_piomode = opti82c611a_set_piomode,
539 .port_disable = ata_port_disable,
540 .tf_load = ata_tf_load,
541 .tf_read = ata_tf_read,
542 .check_status = ata_check_status,
543 .exec_command = ata_exec_command,
544 .dev_select = ata_std_dev_select,
546 .freeze = ata_bmdma_freeze,
547 .thaw = ata_bmdma_thaw,
548 .error_handler = ata_bmdma_error_handler,
549 .post_internal_cmd = ata_bmdma_post_internal_cmd,
551 .qc_prep = ata_qc_prep,
552 .qc_issue = ata_qc_issue_prot,
554 .data_xfer = ata_data_xfer,
556 .irq_handler = ata_interrupt,
557 .irq_clear = ata_bmdma_irq_clear,
558 .irq_on = ata_irq_on,
559 .irq_ack = ata_irq_ack,
561 .port_start = ata_port_start,
567 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
568 * version is dual channel but doesn't have a lot of unique registers.
571 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
573 u8 active, recover, setup;
575 struct ata_device *pair = ata_dev_pair(adev);
577 int khz[4] = { 50000, 40000, 33000, 25000 };
582 sysclk = opti_syscfg(0xAC) & 0xC0; /* BIOS set */
584 /* Enter configuration mode */
585 ioread16(ap->ioaddr.error_addr);
586 ioread16(ap->ioaddr.error_addr);
587 iowrite8(3, ap->ioaddr.nsect_addr);
589 /* Read VLB clock strapping */
590 clock = 1000000000 / khz[sysclk];
592 /* Get the timing data in cycles */
593 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
595 /* Setup timing is shared */
597 struct ata_timing tp;
598 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
600 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
603 active = FIT(t.active, 2, 17) - 2;
604 recover = FIT(t.recover, 1, 16) - 1;
605 setup = FIT(t.setup, 1, 4) - 1;
607 /* Select the right timing bank for write timing */
608 rc = ioread8(ap->ioaddr.lbal_addr);
610 rc |= (adev->devno << 7);
611 iowrite8(rc, ap->ioaddr.lbal_addr);
613 /* Write the timings */
614 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
616 /* Select the right bank for read timings, also
617 load the shared timings for address */
618 rc = ioread8(ap->ioaddr.device_addr);
620 rc |= adev->devno; /* Index select */
621 rc |= (setup << 4) | 0x04;
622 iowrite8(rc, ap->ioaddr.device_addr);
624 /* Load the read timings */
625 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
627 /* Ensure the timing register mode is right */
628 rc = ioread8(ap->ioaddr.lbal_addr);
631 iowrite8(rc, ap->ioaddr.lbal_addr);
633 /* Exit command mode */
634 iowrite8(0x83, ap->ioaddr.nsect_addr);
636 /* We need to know this for quad device on the MVB */
637 ap->host->private_data = ap;
641 * opt82c465mv_qc_issue_prot - command issue
642 * @qc: command pending
644 * Called when the libata layer is about to issue a command. We wrap
645 * this interface so that we can load the correct ATA timings. The
646 * MVB has a single set of timing registers and these are shared
647 * across channels. As there are two registers we really ought to
648 * track the last two used values as a sort of register window. For
649 * now we just reload on a channel switch. On the single channel
650 * setup this condition never fires so we do nothing extra.
652 * FIXME: dual channel needs ->serialize support
655 static unsigned int opti82c46x_qc_issue_prot(struct ata_queued_cmd *qc)
657 struct ata_port *ap = qc->ap;
658 struct ata_device *adev = qc->dev;
660 /* If timings are set and for the wrong channel (2nd test is
661 due to a libata shortcoming and will eventually go I hope) */
662 if (ap->host->private_data != ap->host
663 && ap->host->private_data != NULL)
664 opti82c46x_set_piomode(ap, adev);
666 return ata_qc_issue_prot(qc);
669 static struct ata_port_operations opti82c46x_port_ops = {
670 .set_piomode = opti82c46x_set_piomode,
672 .port_disable = ata_port_disable,
673 .tf_load = ata_tf_load,
674 .tf_read = ata_tf_read,
675 .check_status = ata_check_status,
676 .exec_command = ata_exec_command,
677 .dev_select = ata_std_dev_select,
679 .freeze = ata_bmdma_freeze,
680 .thaw = ata_bmdma_thaw,
681 .error_handler = ata_bmdma_error_handler,
682 .post_internal_cmd = ata_bmdma_post_internal_cmd,
684 .qc_prep = ata_qc_prep,
685 .qc_issue = opti82c46x_qc_issue_prot,
687 .data_xfer = ata_data_xfer,
689 .irq_handler = ata_interrupt,
690 .irq_clear = ata_bmdma_irq_clear,
691 .irq_on = ata_irq_on,
692 .irq_ack = ata_irq_ack,
694 .port_start = ata_port_start,
699 * legacy_init_one - attach a legacy interface
701 * @io: I/O port start
702 * @ctrl: control port
703 * @irq: interrupt line
705 * Register an ISA bus IDE interface. Such interfaces are PIO and we
706 * assume do not support IRQ sharing.
709 static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl, int irq)
711 struct legacy_data *ld = &legacy_data[nr_legacy_host];
712 struct ata_probe_ent ae;
713 struct platform_device *pdev;
714 struct ata_port_operations *ops = &legacy_port_ops;
715 void __iomem *io_addr, *ctrl_addr;
716 int pio_modes = pio_mask;
717 u32 mask = (1 << port);
718 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
721 pdev = platform_device_register_simple(DRV_NAME, nr_legacy_host, NULL, 0);
723 return PTR_ERR(pdev);
726 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL ||
727 devm_request_region(&pdev->dev, ctrl, 1, "pata_legacy") == NULL)
731 io_addr = devm_ioport_map(&pdev->dev, io, 8);
732 ctrl_addr = devm_ioport_map(&pdev->dev, ctrl, 1);
733 if (!io_addr || !ctrl_addr)
736 if (ht6560a & mask) {
737 ops = &ht6560a_port_ops;
739 iordy = ATA_FLAG_NO_IORDY;
741 if (ht6560b & mask) {
742 ops = &ht6560b_port_ops;
745 if (opti82c611a & mask) {
746 ops = &opti82c611a_port_ops;
749 if (opti82c46x & mask) {
750 ops = &opti82c46x_port_ops;
754 /* Probe for automatically detectable controllers */
756 if (io == 0x1F0 && ops == &legacy_port_ops) {
759 local_irq_save(flags);
763 outb(inb(0x1F2) | 0x80, 0x1F2);
770 if ((inb(0x1F2) & 0x80) == 0) {
771 /* PDC20230c or 20630 ? */
772 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller detected.\n");
774 ops = &pdc20230_port_ops;
775 iordy = ATA_FLAG_NO_IORDY;
782 if (inb(0x1F2) == 0x00) {
783 printk(KERN_INFO "PDC20230-B VLB ATA controller detected.\n");
786 local_irq_restore(flags);
790 /* Chip does mode setting by command snooping */
791 if (ops == &legacy_port_ops && (autospeed & mask))
792 ops = &simple_port_ops;
794 memset(&ae, 0, sizeof(struct ata_probe_ent));
795 INIT_LIST_HEAD(&ae.node);
798 ae.sht = &legacy_sht;
800 ae.pio_mask = pio_modes;
803 ae.port_flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST|iordy;
804 ae.port[0].cmd_addr = io_addr;
805 ae.port[0].altstatus_addr = ctrl_addr;
806 ae.port[0].ctl_addr = ctrl_addr;
807 ata_std_ports(&ae.port[0]);
808 ae.private_data = ld;
811 if (!ata_device_add(&ae))
814 legacy_host[nr_legacy_host++] = dev_get_drvdata(&pdev->dev);
815 ld->platform_dev = pdev;
819 platform_device_unregister(pdev);
824 * legacy_check_special_cases - ATA special cases
825 * @p: PCI device to check
826 * @master: set this if we find an ATA master
827 * @master: set this if we find an ATA secondary
829 * A small number of vendors implemented early PCI ATA interfaces on bridge logic
830 * without the ATA interface being PCI visible. Where we have a matching PCI driver
831 * we must skip the relevant device here. If we don't know about it then the legacy
832 * driver is the right driver anyway.
835 static void legacy_check_special_cases(struct pci_dev *p, int *primary, int *secondary)
837 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
838 if (p->vendor == 0x1078 && p->device == 0x0000) {
839 *primary = *secondary = 1;
842 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
843 if (p->vendor == 0x1078 && p->device == 0x0002) {
844 *primary = *secondary = 1;
847 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
848 if (p->vendor == 0x8086 && p->device == 0x1234) {
850 pci_read_config_word(p, 0x6C, &r);
851 if (r & 0x8000) { /* ATA port enabled */
863 * legacy_init - attach legacy interfaces
865 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
866 * Right now we do not scan the ide0 and ide1 address but should do so
867 * for non PCI systems or systems with no PCI IDE legacy mode devices.
868 * If you fix that note there are special cases to consider like VLB
869 * drivers and CS5510/20.
872 static __init int legacy_init(void)
878 int last_port = NR_HOST;
880 struct pci_dev *p = NULL;
882 for_each_pci_dev(p) {
884 /* Check for any overlap of the system ATA mappings. Native mode controllers
885 stuck on these addresses or some devices in 'raid' mode won't be found by
886 the storage class test */
887 for (r = 0; r < 6; r++) {
888 if (pci_resource_start(p, r) == 0x1f0)
890 if (pci_resource_start(p, r) == 0x170)
893 /* Check for special cases */
894 legacy_check_special_cases(p, &primary, &secondary);
896 /* If PCI bus is present then don't probe for tertiary legacy ports */
901 /* If an OPTI 82C46X is present find out where the channels are */
903 static const char *optis[4] = {
908 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
910 opti82c46x = 3; /* Assume master and slave first */
911 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n", optis[ctrl]);
913 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
914 ctrl = opti_syscfg(0xAC);
915 /* Check enabled and this port is the 465MV port. On the
916 MVB we may have two channels */
919 opti82c46x = 2; /* Slave */
921 opti82c46x = 1; /* Master */
923 opti82c46x = 3; /* Master and Slave */
929 for (i = 0; i < last_port; i++) {
930 /* Skip primary if we have seen a PCI one */
931 if (i == 0 && primary == 1)
933 /* Skip secondary if we have seen a PCI one */
934 if (i == 1 && secondary == 1)
936 if (legacy_init_one(i, legacy_port[i],
937 legacy_port[i] + 0x0206,
946 static __exit void legacy_exit(void)
950 for (i = 0; i < nr_legacy_host; i++) {
951 struct legacy_data *ld = &legacy_data[i];
953 ata_host_detach(legacy_host[i]);
954 platform_device_unregister(ld->platform_dev);
956 release_region(ld->timing, 2);
960 MODULE_AUTHOR("Alan Cox");
961 MODULE_DESCRIPTION("low-level driver for legacy ATA");
962 MODULE_LICENSE("GPL");
963 MODULE_VERSION(DRV_VERSION);
965 module_param(probe_all, int, 0);
966 module_param(autospeed, int, 0);
967 module_param(ht6560a, int, 0);
968 module_param(ht6560b, int, 0);
969 module_param(opti82c611a, int, 0);
970 module_param(opti82c46x, int, 0);
971 module_param(pio_mask, int, 0);
972 module_param(iordy_mask, int, 0);
974 module_init(legacy_init);
975 module_exit(legacy_exit);