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 .tf_load = ata_tf_load,
154 .tf_read = ata_tf_read,
155 .check_status = ata_check_status,
156 .exec_command = ata_exec_command,
157 .dev_select = ata_std_dev_select,
159 .freeze = ata_bmdma_freeze,
160 .thaw = ata_bmdma_thaw,
161 .error_handler = ata_bmdma_error_handler,
162 .post_internal_cmd = ata_bmdma_post_internal_cmd,
163 .cable_detect = ata_cable_40wire,
165 .qc_prep = ata_qc_prep,
166 .qc_issue = ata_qc_issue_prot,
168 .data_xfer = ata_data_xfer_noirq,
170 .irq_handler = ata_interrupt,
171 .irq_clear = ata_bmdma_irq_clear,
172 .irq_on = ata_irq_on,
174 .port_start = ata_port_start,
177 static struct ata_port_operations legacy_port_ops = {
178 .set_mode = legacy_set_mode,
180 .tf_load = ata_tf_load,
181 .tf_read = ata_tf_read,
182 .check_status = ata_check_status,
183 .exec_command = ata_exec_command,
184 .dev_select = ata_std_dev_select,
185 .cable_detect = ata_cable_40wire,
187 .freeze = ata_bmdma_freeze,
188 .thaw = ata_bmdma_thaw,
189 .error_handler = ata_bmdma_error_handler,
190 .post_internal_cmd = ata_bmdma_post_internal_cmd,
192 .qc_prep = ata_qc_prep,
193 .qc_issue = ata_qc_issue_prot,
195 .data_xfer = ata_data_xfer_noirq,
197 .irq_handler = ata_interrupt,
198 .irq_clear = ata_bmdma_irq_clear,
199 .irq_on = ata_irq_on,
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->link->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 .tf_load = ata_tf_load,
295 .tf_read = ata_tf_read,
296 .check_status = ata_check_status,
297 .exec_command = ata_exec_command,
298 .dev_select = ata_std_dev_select,
300 .freeze = ata_bmdma_freeze,
301 .thaw = ata_bmdma_thaw,
302 .error_handler = ata_bmdma_error_handler,
303 .post_internal_cmd = ata_bmdma_post_internal_cmd,
304 .cable_detect = ata_cable_40wire,
306 .qc_prep = ata_qc_prep,
307 .qc_issue = ata_qc_issue_prot,
309 .data_xfer = pdc_data_xfer_vlb,
311 .irq_handler = ata_interrupt,
312 .irq_clear = ata_bmdma_irq_clear,
313 .irq_on = ata_irq_on,
315 .port_start = ata_port_start,
319 * Holtek 6560A support
321 * This controller supports PIO0 to PIO2 (no IORDY even though higher timings
325 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
330 /* Get the timing data in cycles. For now play safe at 50Mhz */
331 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
333 active = FIT(t.active, 2, 15);
334 recover = FIT(t.recover, 4, 15);
341 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
342 ioread8(ap->ioaddr.status_addr);
345 static struct ata_port_operations ht6560a_port_ops = {
346 .set_piomode = ht6560a_set_piomode,
348 .tf_load = ata_tf_load,
349 .tf_read = ata_tf_read,
350 .check_status = ata_check_status,
351 .exec_command = ata_exec_command,
352 .dev_select = ata_std_dev_select,
354 .freeze = ata_bmdma_freeze,
355 .thaw = ata_bmdma_thaw,
356 .error_handler = ata_bmdma_error_handler,
357 .post_internal_cmd = ata_bmdma_post_internal_cmd,
358 .cable_detect = ata_cable_40wire,
360 .qc_prep = ata_qc_prep,
361 .qc_issue = ata_qc_issue_prot,
363 .data_xfer = ata_data_xfer, /* Check vlb/noirq */
365 .irq_handler = ata_interrupt,
366 .irq_clear = ata_bmdma_irq_clear,
367 .irq_on = ata_irq_on,
369 .port_start = ata_port_start,
373 * Holtek 6560B support
375 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO setting
376 * unless we see an ATAPI device in which case we force it off.
378 * FIXME: need to implement 2nd channel support.
381 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
386 /* Get the timing data in cycles. For now play safe at 50Mhz */
387 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
389 active = FIT(t.active, 2, 15);
390 recover = FIT(t.recover, 2, 16);
398 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
400 if (adev->class != ATA_DEV_ATA) {
401 u8 rconf = inb(0x3E6);
407 ioread8(ap->ioaddr.status_addr);
410 static struct ata_port_operations ht6560b_port_ops = {
411 .set_piomode = ht6560b_set_piomode,
413 .tf_load = ata_tf_load,
414 .tf_read = ata_tf_read,
415 .check_status = ata_check_status,
416 .exec_command = ata_exec_command,
417 .dev_select = ata_std_dev_select,
419 .freeze = ata_bmdma_freeze,
420 .thaw = ata_bmdma_thaw,
421 .error_handler = ata_bmdma_error_handler,
422 .post_internal_cmd = ata_bmdma_post_internal_cmd,
423 .cable_detect = ata_cable_40wire,
425 .qc_prep = ata_qc_prep,
426 .qc_issue = ata_qc_issue_prot,
428 .data_xfer = ata_data_xfer, /* FIXME: Check 32bit and noirq */
430 .irq_handler = ata_interrupt,
431 .irq_clear = ata_bmdma_irq_clear,
432 .irq_on = ata_irq_on,
434 .port_start = ata_port_start,
438 * Opti core chipset helpers
442 * opti_syscfg - read OPTI chipset configuration
443 * @reg: Configuration register to read
445 * Returns the value of an OPTI system board configuration register.
448 static u8 opti_syscfg(u8 reg)
453 /* Uniprocessor chipset and must force cycles adjancent */
454 local_irq_save(flags);
457 local_irq_restore(flags);
464 * This controller supports PIO0 to PIO3.
467 static void opti82c611a_set_piomode(struct ata_port *ap, struct ata_device *adev)
469 u8 active, recover, setup;
471 struct ata_device *pair = ata_dev_pair(adev);
473 int khz[4] = { 50000, 40000, 33000, 25000 };
476 /* Enter configuration mode */
477 ioread16(ap->ioaddr.error_addr);
478 ioread16(ap->ioaddr.error_addr);
479 iowrite8(3, ap->ioaddr.nsect_addr);
481 /* Read VLB clock strapping */
482 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
484 /* Get the timing data in cycles */
485 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
487 /* Setup timing is shared */
489 struct ata_timing tp;
490 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
492 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
495 active = FIT(t.active, 2, 17) - 2;
496 recover = FIT(t.recover, 1, 16) - 1;
497 setup = FIT(t.setup, 1, 4) - 1;
499 /* Select the right timing bank for write timing */
500 rc = ioread8(ap->ioaddr.lbal_addr);
502 rc |= (adev->devno << 7);
503 iowrite8(rc, ap->ioaddr.lbal_addr);
505 /* Write the timings */
506 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
508 /* Select the right bank for read timings, also
509 load the shared timings for address */
510 rc = ioread8(ap->ioaddr.device_addr);
512 rc |= adev->devno; /* Index select */
513 rc |= (setup << 4) | 0x04;
514 iowrite8(rc, ap->ioaddr.device_addr);
516 /* Load the read timings */
517 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
519 /* Ensure the timing register mode is right */
520 rc = ioread8(ap->ioaddr.lbal_addr);
523 iowrite8(rc, ap->ioaddr.lbal_addr);
525 /* Exit command mode */
526 iowrite8(0x83, ap->ioaddr.nsect_addr);
530 static struct ata_port_operations opti82c611a_port_ops = {
531 .set_piomode = opti82c611a_set_piomode,
533 .tf_load = ata_tf_load,
534 .tf_read = ata_tf_read,
535 .check_status = ata_check_status,
536 .exec_command = ata_exec_command,
537 .dev_select = ata_std_dev_select,
539 .freeze = ata_bmdma_freeze,
540 .thaw = ata_bmdma_thaw,
541 .error_handler = ata_bmdma_error_handler,
542 .post_internal_cmd = ata_bmdma_post_internal_cmd,
543 .cable_detect = ata_cable_40wire,
545 .qc_prep = ata_qc_prep,
546 .qc_issue = ata_qc_issue_prot,
548 .data_xfer = ata_data_xfer,
550 .irq_handler = ata_interrupt,
551 .irq_clear = ata_bmdma_irq_clear,
552 .irq_on = ata_irq_on,
554 .port_start = ata_port_start,
560 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
561 * version is dual channel but doesn't have a lot of unique registers.
564 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
566 u8 active, recover, setup;
568 struct ata_device *pair = ata_dev_pair(adev);
570 int khz[4] = { 50000, 40000, 33000, 25000 };
575 sysclk = opti_syscfg(0xAC) & 0xC0; /* BIOS set */
577 /* Enter configuration mode */
578 ioread16(ap->ioaddr.error_addr);
579 ioread16(ap->ioaddr.error_addr);
580 iowrite8(3, ap->ioaddr.nsect_addr);
582 /* Read VLB clock strapping */
583 clock = 1000000000 / khz[sysclk];
585 /* Get the timing data in cycles */
586 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
588 /* Setup timing is shared */
590 struct ata_timing tp;
591 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
593 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
596 active = FIT(t.active, 2, 17) - 2;
597 recover = FIT(t.recover, 1, 16) - 1;
598 setup = FIT(t.setup, 1, 4) - 1;
600 /* Select the right timing bank for write timing */
601 rc = ioread8(ap->ioaddr.lbal_addr);
603 rc |= (adev->devno << 7);
604 iowrite8(rc, ap->ioaddr.lbal_addr);
606 /* Write the timings */
607 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
609 /* Select the right bank for read timings, also
610 load the shared timings for address */
611 rc = ioread8(ap->ioaddr.device_addr);
613 rc |= adev->devno; /* Index select */
614 rc |= (setup << 4) | 0x04;
615 iowrite8(rc, ap->ioaddr.device_addr);
617 /* Load the read timings */
618 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
620 /* Ensure the timing register mode is right */
621 rc = ioread8(ap->ioaddr.lbal_addr);
624 iowrite8(rc, ap->ioaddr.lbal_addr);
626 /* Exit command mode */
627 iowrite8(0x83, ap->ioaddr.nsect_addr);
629 /* We need to know this for quad device on the MVB */
630 ap->host->private_data = ap;
634 * opt82c465mv_qc_issue_prot - command issue
635 * @qc: command pending
637 * Called when the libata layer is about to issue a command. We wrap
638 * this interface so that we can load the correct ATA timings. The
639 * MVB has a single set of timing registers and these are shared
640 * across channels. As there are two registers we really ought to
641 * track the last two used values as a sort of register window. For
642 * now we just reload on a channel switch. On the single channel
643 * setup this condition never fires so we do nothing extra.
645 * FIXME: dual channel needs ->serialize support
648 static unsigned int opti82c46x_qc_issue_prot(struct ata_queued_cmd *qc)
650 struct ata_port *ap = qc->ap;
651 struct ata_device *adev = qc->dev;
653 /* If timings are set and for the wrong channel (2nd test is
654 due to a libata shortcoming and will eventually go I hope) */
655 if (ap->host->private_data != ap->host
656 && ap->host->private_data != NULL)
657 opti82c46x_set_piomode(ap, adev);
659 return ata_qc_issue_prot(qc);
662 static struct ata_port_operations opti82c46x_port_ops = {
663 .set_piomode = opti82c46x_set_piomode,
665 .tf_load = ata_tf_load,
666 .tf_read = ata_tf_read,
667 .check_status = ata_check_status,
668 .exec_command = ata_exec_command,
669 .dev_select = ata_std_dev_select,
671 .freeze = ata_bmdma_freeze,
672 .thaw = ata_bmdma_thaw,
673 .error_handler = ata_bmdma_error_handler,
674 .post_internal_cmd = ata_bmdma_post_internal_cmd,
675 .cable_detect = ata_cable_40wire,
677 .qc_prep = ata_qc_prep,
678 .qc_issue = opti82c46x_qc_issue_prot,
680 .data_xfer = ata_data_xfer,
682 .irq_handler = ata_interrupt,
683 .irq_clear = ata_bmdma_irq_clear,
684 .irq_on = ata_irq_on,
686 .port_start = ata_port_start,
691 * legacy_init_one - attach a legacy interface
693 * @io: I/O port start
694 * @ctrl: control port
695 * @irq: interrupt line
697 * Register an ISA bus IDE interface. Such interfaces are PIO and we
698 * assume do not support IRQ sharing.
701 static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl, int irq)
703 struct legacy_data *ld = &legacy_data[nr_legacy_host];
704 struct ata_host *host;
706 struct platform_device *pdev;
707 struct ata_port_operations *ops = &legacy_port_ops;
708 void __iomem *io_addr, *ctrl_addr;
709 int pio_modes = pio_mask;
710 u32 mask = (1 << port);
711 u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
714 pdev = platform_device_register_simple(DRV_NAME, nr_legacy_host, NULL, 0);
716 return PTR_ERR(pdev);
719 if (devm_request_region(&pdev->dev, io, 8, "pata_legacy") == NULL ||
720 devm_request_region(&pdev->dev, ctrl, 1, "pata_legacy") == NULL)
724 io_addr = devm_ioport_map(&pdev->dev, io, 8);
725 ctrl_addr = devm_ioport_map(&pdev->dev, ctrl, 1);
726 if (!io_addr || !ctrl_addr)
729 if (ht6560a & mask) {
730 ops = &ht6560a_port_ops;
732 iordy = ATA_FLAG_NO_IORDY;
734 if (ht6560b & mask) {
735 ops = &ht6560b_port_ops;
738 if (opti82c611a & mask) {
739 ops = &opti82c611a_port_ops;
742 if (opti82c46x & mask) {
743 ops = &opti82c46x_port_ops;
747 /* Probe for automatically detectable controllers */
749 if (io == 0x1F0 && ops == &legacy_port_ops) {
752 local_irq_save(flags);
756 outb(inb(0x1F2) | 0x80, 0x1F2);
763 if ((inb(0x1F2) & 0x80) == 0) {
764 /* PDC20230c or 20630 ? */
765 printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller detected.\n");
767 ops = &pdc20230_port_ops;
768 iordy = ATA_FLAG_NO_IORDY;
775 if (inb(0x1F2) == 0x00) {
776 printk(KERN_INFO "PDC20230-B VLB ATA controller detected.\n");
779 local_irq_restore(flags);
783 /* Chip does mode setting by command snooping */
784 if (ops == &legacy_port_ops && (autospeed & mask))
785 ops = &simple_port_ops;
788 host = ata_host_alloc(&pdev->dev, 1);
794 ap->pio_mask = pio_modes;
795 ap->flags |= ATA_FLAG_SLAVE_POSS | iordy;
796 ap->ioaddr.cmd_addr = io_addr;
797 ap->ioaddr.altstatus_addr = ctrl_addr;
798 ap->ioaddr.ctl_addr = ctrl_addr;
799 ata_std_ports(&ap->ioaddr);
800 ap->private_data = ld;
802 ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io, ctrl);
804 ret = ata_host_activate(host, irq, ata_interrupt, 0, &legacy_sht);
808 legacy_host[nr_legacy_host++] = dev_get_drvdata(&pdev->dev);
809 ld->platform_dev = pdev;
813 platform_device_unregister(pdev);
818 * legacy_check_special_cases - ATA special cases
819 * @p: PCI device to check
820 * @master: set this if we find an ATA master
821 * @master: set this if we find an ATA secondary
823 * A small number of vendors implemented early PCI ATA interfaces on bridge logic
824 * without the ATA interface being PCI visible. Where we have a matching PCI driver
825 * we must skip the relevant device here. If we don't know about it then the legacy
826 * driver is the right driver anyway.
829 static void legacy_check_special_cases(struct pci_dev *p, int *primary, int *secondary)
831 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
832 if (p->vendor == 0x1078 && p->device == 0x0000) {
833 *primary = *secondary = 1;
836 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
837 if (p->vendor == 0x1078 && p->device == 0x0002) {
838 *primary = *secondary = 1;
841 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
842 if (p->vendor == 0x8086 && p->device == 0x1234) {
844 pci_read_config_word(p, 0x6C, &r);
845 if (r & 0x8000) { /* ATA port enabled */
857 * legacy_init - attach legacy interfaces
859 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
860 * Right now we do not scan the ide0 and ide1 address but should do so
861 * for non PCI systems or systems with no PCI IDE legacy mode devices.
862 * If you fix that note there are special cases to consider like VLB
863 * drivers and CS5510/20.
866 static __init int legacy_init(void)
872 int last_port = NR_HOST;
874 struct pci_dev *p = NULL;
876 for_each_pci_dev(p) {
878 /* Check for any overlap of the system ATA mappings. Native mode controllers
879 stuck on these addresses or some devices in 'raid' mode won't be found by
880 the storage class test */
881 for (r = 0; r < 6; r++) {
882 if (pci_resource_start(p, r) == 0x1f0)
884 if (pci_resource_start(p, r) == 0x170)
887 /* Check for special cases */
888 legacy_check_special_cases(p, &primary, &secondary);
890 /* If PCI bus is present then don't probe for tertiary legacy ports */
895 /* If an OPTI 82C46X is present find out where the channels are */
897 static const char *optis[4] = {
902 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
904 opti82c46x = 3; /* Assume master and slave first */
905 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n", optis[ctrl]);
907 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
908 ctrl = opti_syscfg(0xAC);
909 /* Check enabled and this port is the 465MV port. On the
910 MVB we may have two channels */
913 opti82c46x = 2; /* Slave */
915 opti82c46x = 1; /* Master */
917 opti82c46x = 3; /* Master and Slave */
923 for (i = 0; i < last_port; i++) {
924 /* Skip primary if we have seen a PCI one */
925 if (i == 0 && primary == 1)
927 /* Skip secondary if we have seen a PCI one */
928 if (i == 1 && secondary == 1)
930 if (legacy_init_one(i, legacy_port[i],
931 legacy_port[i] + 0x0206,
940 static __exit void legacy_exit(void)
944 for (i = 0; i < nr_legacy_host; i++) {
945 struct legacy_data *ld = &legacy_data[i];
947 ata_host_detach(legacy_host[i]);
948 platform_device_unregister(ld->platform_dev);
950 release_region(ld->timing, 2);
954 MODULE_AUTHOR("Alan Cox");
955 MODULE_DESCRIPTION("low-level driver for legacy ATA");
956 MODULE_LICENSE("GPL");
957 MODULE_VERSION(DRV_VERSION);
959 module_param(probe_all, int, 0);
960 module_param(autospeed, int, 0);
961 module_param(ht6560a, int, 0);
962 module_param(ht6560b, int, 0);
963 module_param(opti82c611a, int, 0);
964 module_param(opti82c46x, int, 0);
965 module_param(pio_mask, int, 0);
966 module_param(iordy_mask, int, 0);
968 module_init(legacy_init);
969 module_exit(legacy_exit);