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] = { 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_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,
165 .cable_detect = ata_cable_40wire,
167 .qc_prep = ata_qc_prep,
168 .qc_issue = ata_qc_issue_prot,
170 .data_xfer = ata_data_xfer_noirq,
172 .irq_handler = ata_interrupt,
173 .irq_clear = ata_bmdma_irq_clear,
174 .irq_on = ata_irq_on,
175 .irq_ack = ata_irq_ack,
177 .port_start = ata_port_start,
180 static struct ata_port_operations legacy_port_ops = {
181 .set_mode = legacy_set_mode,
183 .port_disable = ata_port_disable,
184 .tf_load = ata_tf_load,
185 .tf_read = ata_tf_read,
186 .check_status = ata_check_status,
187 .exec_command = ata_exec_command,
188 .dev_select = ata_std_dev_select,
189 .cable_detect = ata_cable_40wire,
191 .freeze = ata_bmdma_freeze,
192 .thaw = ata_bmdma_thaw,
193 .error_handler = ata_bmdma_error_handler,
194 .post_internal_cmd = ata_bmdma_post_internal_cmd,
196 .qc_prep = ata_qc_prep,
197 .qc_issue = ata_qc_issue_prot,
199 .data_xfer = ata_data_xfer_noirq,
201 .irq_handler = ata_interrupt,
202 .irq_clear = ata_bmdma_irq_clear,
203 .irq_on = ata_irq_on,
204 .irq_ack = ata_irq_ack,
206 .port_start = ata_port_start,
210 * Promise 20230C and 20620 support
212 * This controller supports PIO0 to PIO2. We set PIO timings conservatively to
213 * allow for 50MHz Vesa Local Bus. The 20620 DMA support is weird being DMA to
214 * controller and PIO'd to the host and not supported.
217 static void pdc20230_set_piomode(struct ata_port *ap, struct ata_device *adev)
220 int pio = adev->pio_mode - XFER_PIO_0;
224 /* Safe as UP only. Force I/Os to occur together */
226 local_irq_save(flags);
228 /* Unlock the control interface */
232 outb(inb(0x1F2) | 0x80, 0x1F2);
239 while((inb(0x1F2) & 0x80) && --tries);
241 local_irq_restore(flags);
243 outb(inb(0x1F4) & 0x07, 0x1F4);
246 rt &= 0x07 << (3 * adev->devno);
248 rt |= (1 + 3 * pio) << (3 * adev->devno);
251 outb(inb(0x1F2) | 0x01, 0x1F2);
257 static void pdc_data_xfer_vlb(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
259 struct ata_port *ap = adev->ap;
260 int slop = buflen & 3;
263 if (ata_id_has_dword_io(adev->id)) {
264 local_irq_save(flags);
266 /* Perform the 32bit I/O synchronization sequence */
267 ioread8(ap->ioaddr.nsect_addr);
268 ioread8(ap->ioaddr.nsect_addr);
269 ioread8(ap->ioaddr.nsect_addr);
274 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
276 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
278 if (unlikely(slop)) {
281 memcpy(&pad, buf + buflen - slop, slop);
282 pad = le32_to_cpu(pad);
283 iowrite32(pad, ap->ioaddr.data_addr);
285 pad = ioread32(ap->ioaddr.data_addr);
286 pad = cpu_to_le16(pad);
287 memcpy(buf + buflen - slop, &pad, slop);
290 local_irq_restore(flags);
293 ata_data_xfer_noirq(adev, buf, buflen, write_data);
296 static struct ata_port_operations pdc20230_port_ops = {
297 .set_piomode = pdc20230_set_piomode,
299 .port_disable = ata_port_disable,
300 .tf_load = ata_tf_load,
301 .tf_read = ata_tf_read,
302 .check_status = ata_check_status,
303 .exec_command = ata_exec_command,
304 .dev_select = ata_std_dev_select,
306 .freeze = ata_bmdma_freeze,
307 .thaw = ata_bmdma_thaw,
308 .error_handler = ata_bmdma_error_handler,
309 .post_internal_cmd = ata_bmdma_post_internal_cmd,
310 .cable_detect = ata_cable_40wire,
312 .qc_prep = ata_qc_prep,
313 .qc_issue = ata_qc_issue_prot,
315 .data_xfer = pdc_data_xfer_vlb,
317 .irq_handler = ata_interrupt,
318 .irq_clear = ata_bmdma_irq_clear,
319 .irq_on = ata_irq_on,
320 .irq_ack = ata_irq_ack,
322 .port_start = ata_port_start,
326 * Holtek 6560A support
328 * This controller supports PIO0 to PIO2 (no IORDY even though higher timings
332 static void ht6560a_set_piomode(struct ata_port *ap, struct ata_device *adev)
337 /* Get the timing data in cycles. For now play safe at 50Mhz */
338 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
340 active = FIT(t.active, 2, 15);
341 recover = FIT(t.recover, 4, 15);
348 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
349 ioread8(ap->ioaddr.status_addr);
352 static struct ata_port_operations ht6560a_port_ops = {
353 .set_piomode = ht6560a_set_piomode,
355 .port_disable = ata_port_disable,
356 .tf_load = ata_tf_load,
357 .tf_read = ata_tf_read,
358 .check_status = ata_check_status,
359 .exec_command = ata_exec_command,
360 .dev_select = ata_std_dev_select,
362 .freeze = ata_bmdma_freeze,
363 .thaw = ata_bmdma_thaw,
364 .error_handler = ata_bmdma_error_handler,
365 .post_internal_cmd = ata_bmdma_post_internal_cmd,
366 .cable_detect = ata_cable_40wire,
368 .qc_prep = ata_qc_prep,
369 .qc_issue = ata_qc_issue_prot,
371 .data_xfer = ata_data_xfer, /* Check vlb/noirq */
373 .irq_handler = ata_interrupt,
374 .irq_clear = ata_bmdma_irq_clear,
375 .irq_on = ata_irq_on,
376 .irq_ack = ata_irq_ack,
378 .port_start = ata_port_start,
382 * Holtek 6560B support
384 * This controller supports PIO0 to PIO4. We honour the BIOS/jumper FIFO setting
385 * unless we see an ATAPI device in which case we force it off.
387 * FIXME: need to implement 2nd channel support.
390 static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
395 /* Get the timing data in cycles. For now play safe at 50Mhz */
396 ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
398 active = FIT(t.active, 2, 15);
399 recover = FIT(t.recover, 2, 16);
407 iowrite8(recover << 4 | active, ap->ioaddr.device_addr);
409 if (adev->class != ATA_DEV_ATA) {
410 u8 rconf = inb(0x3E6);
416 ioread8(ap->ioaddr.status_addr);
419 static struct ata_port_operations ht6560b_port_ops = {
420 .set_piomode = ht6560b_set_piomode,
422 .port_disable = ata_port_disable,
423 .tf_load = ata_tf_load,
424 .tf_read = ata_tf_read,
425 .check_status = ata_check_status,
426 .exec_command = ata_exec_command,
427 .dev_select = ata_std_dev_select,
429 .freeze = ata_bmdma_freeze,
430 .thaw = ata_bmdma_thaw,
431 .error_handler = ata_bmdma_error_handler,
432 .post_internal_cmd = ata_bmdma_post_internal_cmd,
433 .cable_detect = ata_cable_40wire,
435 .qc_prep = ata_qc_prep,
436 .qc_issue = ata_qc_issue_prot,
438 .data_xfer = ata_data_xfer, /* FIXME: Check 32bit and noirq */
440 .irq_handler = ata_interrupt,
441 .irq_clear = ata_bmdma_irq_clear,
442 .irq_on = ata_irq_on,
443 .irq_ack = ata_irq_ack,
445 .port_start = ata_port_start,
449 * Opti core chipset helpers
453 * opti_syscfg - read OPTI chipset configuration
454 * @reg: Configuration register to read
456 * Returns the value of an OPTI system board configuration register.
459 static u8 opti_syscfg(u8 reg)
464 /* Uniprocessor chipset and must force cycles adjancent */
465 local_irq_save(flags);
468 local_irq_restore(flags);
475 * This controller supports PIO0 to PIO3.
478 static void opti82c611a_set_piomode(struct ata_port *ap, struct ata_device *adev)
480 u8 active, recover, setup;
482 struct ata_device *pair = ata_dev_pair(adev);
484 int khz[4] = { 50000, 40000, 33000, 25000 };
487 /* Enter configuration mode */
488 ioread16(ap->ioaddr.error_addr);
489 ioread16(ap->ioaddr.error_addr);
490 iowrite8(3, ap->ioaddr.nsect_addr);
492 /* Read VLB clock strapping */
493 clock = 1000000000 / khz[ioread8(ap->ioaddr.lbah_addr) & 0x03];
495 /* Get the timing data in cycles */
496 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
498 /* Setup timing is shared */
500 struct ata_timing tp;
501 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
503 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
506 active = FIT(t.active, 2, 17) - 2;
507 recover = FIT(t.recover, 1, 16) - 1;
508 setup = FIT(t.setup, 1, 4) - 1;
510 /* Select the right timing bank for write timing */
511 rc = ioread8(ap->ioaddr.lbal_addr);
513 rc |= (adev->devno << 7);
514 iowrite8(rc, ap->ioaddr.lbal_addr);
516 /* Write the timings */
517 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
519 /* Select the right bank for read timings, also
520 load the shared timings for address */
521 rc = ioread8(ap->ioaddr.device_addr);
523 rc |= adev->devno; /* Index select */
524 rc |= (setup << 4) | 0x04;
525 iowrite8(rc, ap->ioaddr.device_addr);
527 /* Load the read timings */
528 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
530 /* Ensure the timing register mode is right */
531 rc = ioread8(ap->ioaddr.lbal_addr);
534 iowrite8(rc, ap->ioaddr.lbal_addr);
536 /* Exit command mode */
537 iowrite8(0x83, ap->ioaddr.nsect_addr);
541 static struct ata_port_operations opti82c611a_port_ops = {
542 .set_piomode = opti82c611a_set_piomode,
544 .port_disable = ata_port_disable,
545 .tf_load = ata_tf_load,
546 .tf_read = ata_tf_read,
547 .check_status = ata_check_status,
548 .exec_command = ata_exec_command,
549 .dev_select = ata_std_dev_select,
551 .freeze = ata_bmdma_freeze,
552 .thaw = ata_bmdma_thaw,
553 .error_handler = ata_bmdma_error_handler,
554 .post_internal_cmd = ata_bmdma_post_internal_cmd,
555 .cable_detect = ata_cable_40wire,
557 .qc_prep = ata_qc_prep,
558 .qc_issue = ata_qc_issue_prot,
560 .data_xfer = ata_data_xfer,
562 .irq_handler = ata_interrupt,
563 .irq_clear = ata_bmdma_irq_clear,
564 .irq_on = ata_irq_on,
565 .irq_ack = ata_irq_ack,
567 .port_start = ata_port_start,
573 * This controller supports PIO0 to PIO3. Unlike the 611A the MVB
574 * version is dual channel but doesn't have a lot of unique registers.
577 static void opti82c46x_set_piomode(struct ata_port *ap, struct ata_device *adev)
579 u8 active, recover, setup;
581 struct ata_device *pair = ata_dev_pair(adev);
583 int khz[4] = { 50000, 40000, 33000, 25000 };
588 sysclk = opti_syscfg(0xAC) & 0xC0; /* BIOS set */
590 /* Enter configuration mode */
591 ioread16(ap->ioaddr.error_addr);
592 ioread16(ap->ioaddr.error_addr);
593 iowrite8(3, ap->ioaddr.nsect_addr);
595 /* Read VLB clock strapping */
596 clock = 1000000000 / khz[sysclk];
598 /* Get the timing data in cycles */
599 ata_timing_compute(adev, adev->pio_mode, &t, clock, 1000);
601 /* Setup timing is shared */
603 struct ata_timing tp;
604 ata_timing_compute(pair, pair->pio_mode, &tp, clock, 1000);
606 ata_timing_merge(&t, &tp, &t, ATA_TIMING_SETUP);
609 active = FIT(t.active, 2, 17) - 2;
610 recover = FIT(t.recover, 1, 16) - 1;
611 setup = FIT(t.setup, 1, 4) - 1;
613 /* Select the right timing bank for write timing */
614 rc = ioread8(ap->ioaddr.lbal_addr);
616 rc |= (adev->devno << 7);
617 iowrite8(rc, ap->ioaddr.lbal_addr);
619 /* Write the timings */
620 iowrite8(active << 4 | recover, ap->ioaddr.error_addr);
622 /* Select the right bank for read timings, also
623 load the shared timings for address */
624 rc = ioread8(ap->ioaddr.device_addr);
626 rc |= adev->devno; /* Index select */
627 rc |= (setup << 4) | 0x04;
628 iowrite8(rc, ap->ioaddr.device_addr);
630 /* Load the read timings */
631 iowrite8(active << 4 | recover, ap->ioaddr.data_addr);
633 /* Ensure the timing register mode is right */
634 rc = ioread8(ap->ioaddr.lbal_addr);
637 iowrite8(rc, ap->ioaddr.lbal_addr);
639 /* Exit command mode */
640 iowrite8(0x83, ap->ioaddr.nsect_addr);
642 /* We need to know this for quad device on the MVB */
643 ap->host->private_data = ap;
647 * opt82c465mv_qc_issue_prot - command issue
648 * @qc: command pending
650 * Called when the libata layer is about to issue a command. We wrap
651 * this interface so that we can load the correct ATA timings. The
652 * MVB has a single set of timing registers and these are shared
653 * across channels. As there are two registers we really ought to
654 * track the last two used values as a sort of register window. For
655 * now we just reload on a channel switch. On the single channel
656 * setup this condition never fires so we do nothing extra.
658 * FIXME: dual channel needs ->serialize support
661 static unsigned int opti82c46x_qc_issue_prot(struct ata_queued_cmd *qc)
663 struct ata_port *ap = qc->ap;
664 struct ata_device *adev = qc->dev;
666 /* If timings are set and for the wrong channel (2nd test is
667 due to a libata shortcoming and will eventually go I hope) */
668 if (ap->host->private_data != ap->host
669 && ap->host->private_data != NULL)
670 opti82c46x_set_piomode(ap, adev);
672 return ata_qc_issue_prot(qc);
675 static struct ata_port_operations opti82c46x_port_ops = {
676 .set_piomode = opti82c46x_set_piomode,
678 .port_disable = ata_port_disable,
679 .tf_load = ata_tf_load,
680 .tf_read = ata_tf_read,
681 .check_status = ata_check_status,
682 .exec_command = ata_exec_command,
683 .dev_select = ata_std_dev_select,
685 .freeze = ata_bmdma_freeze,
686 .thaw = ata_bmdma_thaw,
687 .error_handler = ata_bmdma_error_handler,
688 .post_internal_cmd = ata_bmdma_post_internal_cmd,
689 .cable_detect = ata_cable_40wire,
691 .qc_prep = ata_qc_prep,
692 .qc_issue = opti82c46x_qc_issue_prot,
694 .data_xfer = ata_data_xfer,
696 .irq_handler = ata_interrupt,
697 .irq_clear = ata_bmdma_irq_clear,
698 .irq_on = ata_irq_on,
699 .irq_ack = ata_irq_ack,
701 .port_start = ata_port_start,
706 * legacy_init_one - attach a legacy interface
708 * @io: I/O port start
709 * @ctrl: control port
710 * @irq: interrupt line
712 * Register an ISA bus IDE interface. Such interfaces are PIO and we
713 * assume do not support IRQ sharing.
716 static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl, int irq)
718 struct legacy_data *ld = &legacy_data[nr_legacy_host];
719 struct ata_probe_ent ae;
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;
801 memset(&ae, 0, sizeof(struct ata_probe_ent));
802 INIT_LIST_HEAD(&ae.node);
805 ae.sht = &legacy_sht;
807 ae.pio_mask = pio_modes;
810 ae.port_flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST|iordy;
811 ae.port[0].cmd_addr = io_addr;
812 ae.port[0].altstatus_addr = ctrl_addr;
813 ae.port[0].ctl_addr = ctrl_addr;
814 ata_std_ports(&ae.port[0]);
815 ae.private_data = ld;
818 if (!ata_device_add(&ae))
821 legacy_host[nr_legacy_host++] = dev_get_drvdata(&pdev->dev);
822 ld->platform_dev = pdev;
826 platform_device_unregister(pdev);
831 * legacy_check_special_cases - ATA special cases
832 * @p: PCI device to check
833 * @master: set this if we find an ATA master
834 * @master: set this if we find an ATA secondary
836 * A small number of vendors implemented early PCI ATA interfaces on bridge logic
837 * without the ATA interface being PCI visible. Where we have a matching PCI driver
838 * we must skip the relevant device here. If we don't know about it then the legacy
839 * driver is the right driver anyway.
842 static void legacy_check_special_cases(struct pci_dev *p, int *primary, int *secondary)
844 /* Cyrix CS5510 pre SFF MWDMA ATA on the bridge */
845 if (p->vendor == 0x1078 && p->device == 0x0000) {
846 *primary = *secondary = 1;
849 /* Cyrix CS5520 pre SFF MWDMA ATA on the bridge */
850 if (p->vendor == 0x1078 && p->device == 0x0002) {
851 *primary = *secondary = 1;
854 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
855 if (p->vendor == 0x8086 && p->device == 0x1234) {
857 pci_read_config_word(p, 0x6C, &r);
858 if (r & 0x8000) { /* ATA port enabled */
870 * legacy_init - attach legacy interfaces
872 * Attach legacy IDE interfaces by scanning the usual IRQ/port suspects.
873 * Right now we do not scan the ide0 and ide1 address but should do so
874 * for non PCI systems or systems with no PCI IDE legacy mode devices.
875 * If you fix that note there are special cases to consider like VLB
876 * drivers and CS5510/20.
879 static __init int legacy_init(void)
885 int last_port = NR_HOST;
887 struct pci_dev *p = NULL;
889 for_each_pci_dev(p) {
891 /* Check for any overlap of the system ATA mappings. Native mode controllers
892 stuck on these addresses or some devices in 'raid' mode won't be found by
893 the storage class test */
894 for (r = 0; r < 6; r++) {
895 if (pci_resource_start(p, r) == 0x1f0)
897 if (pci_resource_start(p, r) == 0x170)
900 /* Check for special cases */
901 legacy_check_special_cases(p, &primary, &secondary);
903 /* If PCI bus is present then don't probe for tertiary legacy ports */
908 /* If an OPTI 82C46X is present find out where the channels are */
910 static const char *optis[4] = {
915 u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
917 opti82c46x = 3; /* Assume master and slave first */
918 printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n", optis[ctrl]);
920 chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
921 ctrl = opti_syscfg(0xAC);
922 /* Check enabled and this port is the 465MV port. On the
923 MVB we may have two channels */
926 opti82c46x = 2; /* Slave */
928 opti82c46x = 1; /* Master */
930 opti82c46x = 3; /* Master and Slave */
936 for (i = 0; i < last_port; i++) {
937 /* Skip primary if we have seen a PCI one */
938 if (i == 0 && primary == 1)
940 /* Skip secondary if we have seen a PCI one */
941 if (i == 1 && secondary == 1)
943 if (legacy_init_one(i, legacy_port[i],
944 legacy_port[i] + 0x0206,
953 static __exit void legacy_exit(void)
957 for (i = 0; i < nr_legacy_host; i++) {
958 struct legacy_data *ld = &legacy_data[i];
960 ata_host_detach(legacy_host[i]);
961 platform_device_unregister(ld->platform_dev);
963 release_region(ld->timing, 2);
967 MODULE_AUTHOR("Alan Cox");
968 MODULE_DESCRIPTION("low-level driver for legacy ATA");
969 MODULE_LICENSE("GPL");
970 MODULE_VERSION(DRV_VERSION);
972 module_param(probe_all, int, 0);
973 module_param(autospeed, int, 0);
974 module_param(ht6560a, int, 0);
975 module_param(ht6560b, int, 0);
976 module_param(opti82c611a, int, 0);
977 module_param(opti82c46x, int, 0);
978 module_param(pio_mask, int, 0);
979 module_param(iordy_mask, int, 0);
981 module_init(legacy_init);
982 module_exit(legacy_exit);