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 "0.5.5"
71 static int legacy_port[NR_HOST] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
72 static int legacy_irq[NR_HOST] = { 14, 15, 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_link *link, struct ata_device **unused)
112 struct ata_device *dev;
114 ata_link_for_each_dev(dev, link) {
115 if (ata_dev_enabled(dev)) {
116 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
117 dev->pio_mode = XFER_PIO_0;
118 dev->xfer_mode = XFER_PIO_0;
119 dev->xfer_shift = ATA_SHIFT_PIO;
120 dev->flags |= ATA_DFLAG_PIO;
126 static struct scsi_host_template legacy_sht = {
127 .module = THIS_MODULE,
129 .ioctl = ata_scsi_ioctl,
130 .queuecommand = ata_scsi_queuecmd,
131 .can_queue = ATA_DEF_QUEUE,
132 .this_id = ATA_SHT_THIS_ID,
133 .sg_tablesize = LIBATA_MAX_PRD,
134 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
135 .emulated = ATA_SHT_EMULATED,
136 .use_clustering = ATA_SHT_USE_CLUSTERING,
137 .proc_name = DRV_NAME,
138 .dma_boundary = ATA_DMA_BOUNDARY,
139 .slave_configure = ata_scsi_slave_config,
140 .slave_destroy = ata_scsi_slave_destroy,
141 .bios_param = ata_std_bios_param,
145 * These ops are used if the user indicates the hardware
146 * snoops the commands to decide on the mode and handles the
147 * mode selection "magically" itself. Several legacy controllers
148 * do this. The mode range can be set if it is not 0x1F by setting
152 static struct ata_port_operations simple_port_ops = {
153 .port_disable = ata_port_disable,
154 .tf_load = ata_tf_load,
155 .tf_read = ata_tf_read,
156 .check_status = ata_check_status,
157 .exec_command = ata_exec_command,
158 .dev_select = ata_std_dev_select,
160 .freeze = ata_bmdma_freeze,
161 .thaw = ata_bmdma_thaw,
162 .error_handler = ata_bmdma_error_handler,
163 .post_internal_cmd = ata_bmdma_post_internal_cmd,
164 .cable_detect = ata_cable_40wire,
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,
188 .cable_detect = ata_cable_40wire,
190 .freeze = ata_bmdma_freeze,
191 .thaw = ata_bmdma_thaw,
192 .error_handler = ata_bmdma_error_handler,
193 .post_internal_cmd = ata_bmdma_post_internal_cmd,
195 .qc_prep = ata_qc_prep,
196 .qc_issue = ata_qc_issue_prot,
198 .data_xfer = ata_data_xfer_noirq,
200 .irq_handler = ata_interrupt,
201 .irq_clear = ata_bmdma_irq_clear,
202 .irq_on = ata_irq_on,
203 .irq_ack = ata_irq_ack,
205 .port_start = ata_port_start,
209 * Promise 20230C and 20620 support
211 * This controller supports PIO0 to PIO2. We set PIO timings conservatively to
212 * allow for 50MHz Vesa Local Bus. The 20620 DMA support is weird being DMA to
213 * controller and PIO'd to the host and not supported.
216 static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
219 int pio = adev->pio_mode - XFER_PIO_0;
223 /* Safe as UP only. Force I/Os to occur together */
225 local_irq_save(flags);
227 /* Unlock the control interface */
231 outb(inb(0x1F2) | 0x80, 0x1F2);
238 while((inb(0x1F2) & 0x80) && --tries);
240 local_irq_restore(flags);
242 outb(inb(0x1F4) & 0x07, 0x1F4);
245 rt &= 0x07 << (3 * adev->devno);
247 rt |= (1 + 3 * pio) << (3 * adev->devno);
250 outb(inb(0x1F2) | 0x01, 0x1F2);
256 static void pdc_data_xfer_vlb(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
258 struct ata_port *ap = adev->link->ap;
259 int slop = buflen & 3;
262 if (ata_id_has_dword_io(adev->id)) {
263 local_irq_save(flags);
265 /* Perform the 32bit I/O synchronization sequence */
266 ioread8(ap->ioaddr.nsect_addr);
267 ioread8(ap->ioaddr.nsect_addr);
268 ioread8(ap->ioaddr.nsect_addr);
273 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
275 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
277 if (unlikely(slop)) {
280 memcpy(&pad, buf + buflen - slop, slop);
281 pad = le32_to_cpu(pad);
282 iowrite32(pad, ap->ioaddr.data_addr);
284 pad = ioread32(ap->ioaddr.data_addr);
285 pad = cpu_to_le16(pad);
286 memcpy(buf + buflen - slop, &pad, slop);
289 local_irq_restore(flags);
292 ata_data_xfer_noirq(adev, buf, buflen, write_data);
295 static struct ata_port_operations pdc20230_port_ops = {
296 .set_piomode = pdc20230_set_piomode,
298 .port_disable = ata_port_disable,
299 .tf_load = ata_tf_load,
300 .tf_read = ata_tf_read,
301 .check_status = ata_check_status,
302 .exec_command = ata_exec_command,
303 .dev_select = ata_std_dev_select,
305 .freeze = ata_bmdma_freeze,
306 .thaw = ata_bmdma_thaw,
307 .error_handler = ata_bmdma_error_handler,
308 .post_internal_cmd = ata_bmdma_post_internal_cmd,
309 .cable_detect = ata_cable_40wire,
311 .qc_prep = ata_qc_prep,
312 .qc_issue = ata_qc_issue_prot,
314 .data_xfer = pdc_data_xfer_vlb,
316 .irq_handler = ata_interrupt,
317 .irq_clear = ata_bmdma_irq_clear,
318 .irq_on = ata_irq_on,
319 .irq_ack = ata_irq_ack,
321 .port_start = ata_port_start,
325 * Holtek 6560A support
327 * This controller supports PIO0 to PIO2 (no IORDY even though higher timings
331 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
336 /* Get the timing data in cycles. For now play safe at 50Mhz */
337 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
339 active = FIT(t.active, 2, 15);
340 recover = FIT(t.recover, 4, 15);
347 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
348 ioread8(ap->ioaddr.status_addr);
351 static struct ata_port_operations ht6560a_port_ops = {
352 .set_piomode = ht6560a_set_piomode,
354 .port_disable = ata_port_disable,
355 .tf_load = ata_tf_load,
356 .tf_read = ata_tf_read,
357 .check_status = ata_check_status,
358 .exec_command = ata_exec_command,
359 .dev_select = ata_std_dev_select,
361 .freeze = ata_bmdma_freeze,
362 .thaw = ata_bmdma_thaw,
363 .error_handler = ata_bmdma_error_handler,
364 .post_internal_cmd = ata_bmdma_post_internal_cmd,
365 .cable_detect = ata_cable_40wire,
367 .qc_prep = ata_qc_prep,
368 .qc_issue = ata_qc_issue_prot,
370 .data_xfer = ata_data_xfer, /* Check vlb/noirq */
372 .irq_handler = ata_interrupt,
373 .irq_clear = ata_bmdma_irq_clear,
374 .irq_on = ata_irq_on,
375 .irq_ack = ata_irq_ack,
377 .port_start = ata_port_start,
381 * Holtek 6560B support
383 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO setting
384 * unless we see an ATAPI device in which case we force it off.
386 * FIXME: need to implement 2nd channel support.
389 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
394 /* Get the timing data in cycles. For now play safe at 50Mhz */
395 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
397 active = FIT(t.active, 2, 15);
398 recover = FIT(t.recover, 2, 16);
406 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
408 if (adev->class != ATA_DEV_ATA) {
409 u8 rconf = inb(0x3E6);
415 ioread8(ap->ioaddr.status_addr);
418 static struct ata_port_operations ht6560b_port_ops = {
419 .set_piomode = ht6560b_set_piomode,
421 .port_disable = ata_port_disable,
422 .tf_load = ata_tf_load,
423 .tf_read = ata_tf_read,
424 .check_status = ata_check_status,
425 .exec_command = ata_exec_command,
426 .dev_select = ata_std_dev_select,
428 .freeze = ata_bmdma_freeze,
429 .thaw = ata_bmdma_thaw,
430 .error_handler = ata_bmdma_error_handler,
431 .post_internal_cmd = ata_bmdma_post_internal_cmd,
432 .cable_detect = ata_cable_40wire,
434 .qc_prep = ata_qc_prep,
435 .qc_issue = ata_qc_issue_prot,
437 .data_xfer = ata_data_xfer, /* FIXME: Check 32bit and noirq */
439 .irq_handler = ata_interrupt,
440 .irq_clear = ata_bmdma_irq_clear,
441 .irq_on = ata_irq_on,
442 .irq_ack = ata_irq_ack,
444 .port_start = ata_port_start,
448 * Opti core chipset helpers
452 * opti_syscfg - read OPTI chipset configuration
453 * @reg: Configuration register to read
455 * Returns the value of an OPTI system board configuration register.
458 static u8 opti_syscfg(u8 reg)
463 /* Uniprocessor chipset and must force cycles adjancent */
464 local_irq_save(flags);
467 local_irq_restore(flags);
474 * This controller supports PIO0 to PIO3.
477 static void opti82c611a_set_piomode(struct ata_port *ap, struct ata_device *adev)
479 u8 active, recover, setup;
481 struct ata_device *pair = ata_dev_pair(adev);
483 int khz[4] = { 50000, 40000, 33000, 25000 };
486 /* Enter configuration mode */
487 ioread16(ap->ioaddr.error_addr);
488 ioread16(ap->ioaddr.error_addr);
489 iowrite8(3, ap->ioaddr.nsect_addr);
491 /* Read VLB clock strapping */
492 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
494 /* Get the timing data in cycles */
495 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
497 /* Setup timing is shared */
499 struct ata_timing tp;
500 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
502 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
505 active = FIT(t.active, 2, 17) - 2;
506 recover = FIT(t.recover, 1, 16) - 1;
507 setup = FIT(t.setup, 1, 4) - 1;
509 /* Select the right timing bank for write timing */
510 rc = ioread8(ap->ioaddr.lbal_addr);
512 rc |= (adev->devno << 7);
513 iowrite8(rc, ap->ioaddr.lbal_addr);
515 /* Write the timings */
516 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
518 /* Select the right bank for read timings, also
519 load the shared timings for address */
520 rc = ioread8(ap->ioaddr.device_addr);
522 rc |= adev->devno; /* Index select */
523 rc |= (setup << 4) | 0x04;
524 iowrite8(rc, ap->ioaddr.device_addr);
526 /* Load the read timings */
527 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
529 /* Ensure the timing register mode is right */
530 rc = ioread8(ap->ioaddr.lbal_addr);
533 iowrite8(rc, ap->ioaddr.lbal_addr);
535 /* Exit command mode */
536 iowrite8(0x83, ap->ioaddr.nsect_addr);
540 static struct ata_port_operations opti82c611a_port_ops = {
541 .set_piomode = opti82c611a_set_piomode,
543 .port_disable = ata_port_disable,
544 .tf_load = ata_tf_load,
545 .tf_read = ata_tf_read,
546 .check_status = ata_check_status,
547 .exec_command = ata_exec_command,
548 .dev_select = ata_std_dev_select,
550 .freeze = ata_bmdma_freeze,
551 .thaw = ata_bmdma_thaw,
552 .error_handler = ata_bmdma_error_handler,
553 .post_internal_cmd = ata_bmdma_post_internal_cmd,
554 .cable_detect = ata_cable_40wire,
556 .qc_prep = ata_qc_prep,
557 .qc_issue = ata_qc_issue_prot,
559 .data_xfer = ata_data_xfer,
561 .irq_handler = ata_interrupt,
562 .irq_clear = ata_bmdma_irq_clear,
563 .irq_on = ata_irq_on,
564 .irq_ack = ata_irq_ack,
566 .port_start = ata_port_start,
572 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
573 * version is dual channel but doesn't have a lot of unique registers.
576 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
578 u8 active, recover, setup;
580 struct ata_device *pair = ata_dev_pair(adev);
582 int khz[4] = { 50000, 40000, 33000, 25000 };
587 sysclk = opti_syscfg(0xAC) & 0xC0; /* BIOS set */
589 /* Enter configuration mode */
590 ioread16(ap->ioaddr.error_addr);
591 ioread16(ap->ioaddr.error_addr);
592 iowrite8(3, ap->ioaddr.nsect_addr);
594 /* Read VLB clock strapping */
595 clock = 1000000000 / khz[sysclk];
597 /* Get the timing data in cycles */
598 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
600 /* Setup timing is shared */
602 struct ata_timing tp;
603 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
605 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
608 active = FIT(t.active, 2, 17) - 2;
609 recover = FIT(t.recover, 1, 16) - 1;
610 setup = FIT(t.setup, 1, 4) - 1;
612 /* Select the right timing bank for write timing */
613 rc = ioread8(ap->ioaddr.lbal_addr);
615 rc |= (adev->devno << 7);
616 iowrite8(rc, ap->ioaddr.lbal_addr);
618 /* Write the timings */
619 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
621 /* Select the right bank for read timings, also
622 load the shared timings for address */
623 rc = ioread8(ap->ioaddr.device_addr);
625 rc |= adev->devno; /* Index select */
626 rc |= (setup << 4) | 0x04;
627 iowrite8(rc, ap->ioaddr.device_addr);
629 /* Load the read timings */
630 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
632 /* Ensure the timing register mode is right */
633 rc = ioread8(ap->ioaddr.lbal_addr);
636 iowrite8(rc, ap->ioaddr.lbal_addr);
638 /* Exit command mode */
639 iowrite8(0x83, ap->ioaddr.nsect_addr);
641 /* We need to know this for quad device on the MVB */
642 ap->host->private_data = ap;
646 * opt82c465mv_qc_issue_prot - command issue
647 * @qc: command pending
649 * Called when the libata layer is about to issue a command. We wrap
650 * this interface so that we can load the correct ATA timings. The
651 * MVB has a single set of timing registers and these are shared
652 * across channels. As there are two registers we really ought to
653 * track the last two used values as a sort of register window. For
654 * now we just reload on a channel switch. On the single channel
655 * setup this condition never fires so we do nothing extra.
657 * FIXME: dual channel needs ->serialize support
660 static unsigned int opti82c46x_qc_issue_prot(struct ata_queued_cmd *qc)
662 struct ata_port *ap = qc->ap;
663 struct ata_device *adev = qc->dev;
665 /* If timings are set and for the wrong channel (2nd test is
666 due to a libata shortcoming and will eventually go I hope) */
667 if (ap->host->private_data != ap->host
668 && ap->host->private_data != NULL)
669 opti82c46x_set_piomode(ap, adev);
671 return ata_qc_issue_prot(qc);
674 static struct ata_port_operations opti82c46x_port_ops = {
675 .set_piomode = opti82c46x_set_piomode,
677 .port_disable = ata_port_disable,
678 .tf_load = ata_tf_load,
679 .tf_read = ata_tf_read,
680 .check_status = ata_check_status,
681 .exec_command = ata_exec_command,
682 .dev_select = ata_std_dev_select,
684 .freeze = ata_bmdma_freeze,
685 .thaw = ata_bmdma_thaw,
686 .error_handler = ata_bmdma_error_handler,
687 .post_internal_cmd = ata_bmdma_post_internal_cmd,
688 .cable_detect = ata_cable_40wire,
690 .qc_prep = ata_qc_prep,
691 .qc_issue = opti82c46x_qc_issue_prot,
693 .data_xfer = ata_data_xfer,
695 .irq_handler = ata_interrupt,
696 .irq_clear = ata_bmdma_irq_clear,
697 .irq_on = ata_irq_on,
698 .irq_ack = ata_irq_ack,
700 .port_start = ata_port_start,
705 * legacy_init_one - attach a legacy interface
707 * @io: I/O port start
708 * @ctrl: control port
709 * @irq: interrupt line
711 * Register an ISA bus IDE interface. Such interfaces are PIO and we
712 * assume do not support IRQ sharing.
715 static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl, int irq)
717 struct legacy_data *ld = &legacy_data[nr_legacy_host];
718 struct ata_host *host;
720 struct platform_device *pdev;
721 struct ata_port_operations *ops = &legacy_port_ops;
722 void __iomem *io_addr, *ctrl_addr;
723 int pio_modes = pio_mask;
724 u32 mask = (1 << port);
725 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
728 pdev = platform_device_register_simple(DRV_NAME, nr_legacy_host, NULL, 0);
730 return PTR_ERR(pdev);
733 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL ||
734 devm_request_region(&pdev->dev, ctrl, 1, "pata_legacy") == NULL)
738 io_addr = devm_ioport_map(&pdev->dev, io, 8);
739 ctrl_addr = devm_ioport_map(&pdev->dev, ctrl, 1);
740 if (!io_addr || !ctrl_addr)
743 if (ht6560a & mask) {
744 ops = &ht6560a_port_ops;
746 iordy = ATA_FLAG_NO_IORDY;
748 if (ht6560b & mask) {
749 ops = &ht6560b_port_ops;
752 if (opti82c611a & mask) {
753 ops = &opti82c611a_port_ops;
756 if (opti82c46x & mask) {
757 ops = &opti82c46x_port_ops;
761 /* Probe for automatically detectable controllers */
763 if (io == 0x1F0 && ops == &legacy_port_ops) {
766 local_irq_save(flags);
770 outb(inb(0x1F2) | 0x80, 0x1F2);
777 if ((inb(0x1F2) & 0x80) == 0) {
778 /* PDC20230c or 20630 ? */
779 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller detected.\n");
781 ops = &pdc20230_port_ops;
782 iordy = ATA_FLAG_NO_IORDY;
789 if (inb(0x1F2) == 0x00) {
790 printk(KERN_INFO "PDC20230-B VLB ATA controller detected.\n");
793 local_irq_restore(flags);
797 /* Chip does mode setting by command snooping */
798 if (ops == &legacy_port_ops && (autospeed & mask))
799 ops = &simple_port_ops;
802 host = ata_host_alloc(&pdev->dev, 1);
808 ap->pio_mask = pio_modes;
809 ap->flags |= ATA_FLAG_SLAVE_POSS | iordy;
810 ap->ioaddr.cmd_addr = io_addr;
811 ap->ioaddr.altstatus_addr = ctrl_addr;
812 ap->ioaddr.ctl_addr = ctrl_addr;
813 ata_std_ports(&ap->ioaddr);
814 ap->private_data = ld;
816 ret = ata_host_activate(host, irq, ata_interrupt, 0, &legacy_sht);
820 legacy_host[nr_legacy_host++] = dev_get_drvdata(&pdev->dev);
821 ld->platform_dev = pdev;
825 platform_device_unregister(pdev);
830 * legacy_check_special_cases - ATA special cases
831 * @p: PCI device to check
832 * @master: set this if we find an ATA master
833 * @master: set this if we find an ATA secondary
835 * A small number of vendors implemented early PCI ATA interfaces on bridge logic
836 * without the ATA interface being PCI visible. Where we have a matching PCI driver
837 * we must skip the relevant device here. If we don't know about it then the legacy
838 * driver is the right driver anyway.
841 static void legacy_check_special_cases(struct pci_dev *p, int *primary, int *secondary)
843 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
844 if (p->vendor == 0x1078 && p->device == 0x0000) {
845 *primary = *secondary = 1;
848 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
849 if (p->vendor == 0x1078 && p->device == 0x0002) {
850 *primary = *secondary = 1;
853 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
854 if (p->vendor == 0x8086 && p->device == 0x1234) {
856 pci_read_config_word(p, 0x6C, &r);
857 if (r & 0x8000) { /* ATA port enabled */
869 * legacy_init - attach legacy interfaces
871 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
872 * Right now we do not scan the ide0 and ide1 address but should do so
873 * for non PCI systems or systems with no PCI IDE legacy mode devices.
874 * If you fix that note there are special cases to consider like VLB
875 * drivers and CS5510/20.
878 static __init int legacy_init(void)
884 int last_port = NR_HOST;
886 struct pci_dev *p = NULL;
888 for_each_pci_dev(p) {
890 /* Check for any overlap of the system ATA mappings. Native mode controllers
891 stuck on these addresses or some devices in 'raid' mode won't be found by
892 the storage class test */
893 for (r = 0; r < 6; r++) {
894 if (pci_resource_start(p, r) == 0x1f0)
896 if (pci_resource_start(p, r) == 0x170)
899 /* Check for special cases */
900 legacy_check_special_cases(p, &primary, &secondary);
902 /* If PCI bus is present then don't probe for tertiary legacy ports */
907 /* If an OPTI 82C46X is present find out where the channels are */
909 static const char *optis[4] = {
914 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
916 opti82c46x = 3; /* Assume master and slave first */
917 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n", optis[ctrl]);
919 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
920 ctrl = opti_syscfg(0xAC);
921 /* Check enabled and this port is the 465MV port. On the
922 MVB we may have two channels */
925 opti82c46x = 2; /* Slave */
927 opti82c46x = 1; /* Master */
929 opti82c46x = 3; /* Master and Slave */
935 for (i = 0; i < last_port; i++) {
936 /* Skip primary if we have seen a PCI one */
937 if (i == 0 && primary == 1)
939 /* Skip secondary if we have seen a PCI one */
940 if (i == 1 && secondary == 1)
942 if (legacy_init_one(i, legacy_port[i],
943 legacy_port[i] + 0x0206,
952 static __exit void legacy_exit(void)
956 for (i = 0; i < nr_legacy_host; i++) {
957 struct legacy_data *ld = &legacy_data[i];
959 ata_host_detach(legacy_host[i]);
960 platform_device_unregister(ld->platform_dev);
962 release_region(ld->timing, 2);
966 MODULE_AUTHOR("Alan Cox");
967 MODULE_DESCRIPTION("low-level driver for legacy ATA");
968 MODULE_LICENSE("GPL");
969 MODULE_VERSION(DRV_VERSION);
971 module_param(probe_all, int, 0);
972 module_param(autospeed, int, 0);
973 module_param(ht6560a, int, 0);
974 module_param(ht6560b, int, 0);
975 module_param(opti82c611a, int, 0);
976 module_param(opti82c46x, int, 0);
977 module_param(pio_mask, int, 0);
978 module_param(iordy_mask, int, 0);
980 module_init(legacy_init);
981 module_exit(legacy_exit);