2 * libata-bmdma.c - helper library for PCI IDE BMDMA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2006 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2006 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/kernel.h>
36 #include <linux/pci.h>
37 #include <linux/libata.h>
42 * ata_irq_on - Enable interrupts on a port.
43 * @ap: Port on which interrupts are enabled.
45 * Enable interrupts on a legacy IDE device using MMIO or PIO,
46 * wait for idle, clear any pending interrupts.
49 * Inherited from caller.
51 u8 ata_irq_on(struct ata_port *ap)
53 struct ata_ioports *ioaddr = &ap->ioaddr;
57 ap->last_ctl = ap->ctl;
59 iowrite8(ap->ctl, ioaddr->ctl_addr);
60 tmp = ata_wait_idle(ap);
62 ap->ops->irq_clear(ap);
67 u8 ata_dummy_irq_on (struct ata_port *ap) { return 0; }
70 * ata_irq_ack - Acknowledge a device interrupt.
71 * @ap: Port on which interrupts are enabled.
73 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
74 * or BUSY+DRQ clear). Obtain dma status and port status from
75 * device. Clear the interrupt. Return port status.
80 u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
82 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
83 u8 host_stat, post_stat, status;
85 status = ata_busy_wait(ap, bits, 1000);
88 printk(KERN_ERR "abnormal status 0x%X\n", status);
90 /* get controller status; clear intr, err bits */
91 host_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
92 iowrite8(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
93 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
95 post_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
98 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
100 host_stat, post_stat, status);
105 u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq) { return 0; }
108 * ata_tf_load - send taskfile registers to host controller
109 * @ap: Port to which output is sent
110 * @tf: ATA taskfile register set
112 * Outputs ATA taskfile to standard ATA host controller.
115 * Inherited from caller.
118 void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
120 struct ata_ioports *ioaddr = &ap->ioaddr;
121 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
123 if (tf->ctl != ap->last_ctl) {
124 iowrite8(tf->ctl, ioaddr->ctl_addr);
125 ap->last_ctl = tf->ctl;
129 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
130 iowrite8(tf->hob_feature, ioaddr->feature_addr);
131 iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
132 iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
133 iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
134 iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
135 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
144 iowrite8(tf->feature, ioaddr->feature_addr);
145 iowrite8(tf->nsect, ioaddr->nsect_addr);
146 iowrite8(tf->lbal, ioaddr->lbal_addr);
147 iowrite8(tf->lbam, ioaddr->lbam_addr);
148 iowrite8(tf->lbah, ioaddr->lbah_addr);
149 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
157 if (tf->flags & ATA_TFLAG_DEVICE) {
158 iowrite8(tf->device, ioaddr->device_addr);
159 VPRINTK("device 0x%X\n", tf->device);
166 * ata_exec_command - issue ATA command to host controller
167 * @ap: port to which command is being issued
168 * @tf: ATA taskfile register set
170 * Issues ATA command, with proper synchronization with interrupt
171 * handler / other threads.
174 * spin_lock_irqsave(host lock)
176 void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf)
178 DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
180 iowrite8(tf->command, ap->ioaddr.command_addr);
185 * ata_tf_read - input device's ATA taskfile shadow registers
186 * @ap: Port from which input is read
187 * @tf: ATA taskfile register set for storing input
189 * Reads ATA taskfile registers for currently-selected device
193 * Inherited from caller.
195 void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
197 struct ata_ioports *ioaddr = &ap->ioaddr;
199 tf->command = ata_check_status(ap);
200 tf->feature = ioread8(ioaddr->error_addr);
201 tf->nsect = ioread8(ioaddr->nsect_addr);
202 tf->lbal = ioread8(ioaddr->lbal_addr);
203 tf->lbam = ioread8(ioaddr->lbam_addr);
204 tf->lbah = ioread8(ioaddr->lbah_addr);
205 tf->device = ioread8(ioaddr->device_addr);
207 if (tf->flags & ATA_TFLAG_LBA48) {
208 iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
209 tf->hob_feature = ioread8(ioaddr->error_addr);
210 tf->hob_nsect = ioread8(ioaddr->nsect_addr);
211 tf->hob_lbal = ioread8(ioaddr->lbal_addr);
212 tf->hob_lbam = ioread8(ioaddr->lbam_addr);
213 tf->hob_lbah = ioread8(ioaddr->lbah_addr);
218 * ata_check_status - Read device status reg & clear interrupt
219 * @ap: port where the device is
221 * Reads ATA taskfile status register for currently-selected device
222 * and return its value. This also clears pending interrupts
226 * Inherited from caller.
228 u8 ata_check_status(struct ata_port *ap)
230 return ioread8(ap->ioaddr.status_addr);
234 * ata_altstatus - Read device alternate status reg
235 * @ap: port where the device is
237 * Reads ATA taskfile alternate status register for
238 * currently-selected device and return its value.
240 * Note: may NOT be used as the check_altstatus() entry in
241 * ata_port_operations.
244 * Inherited from caller.
246 u8 ata_altstatus(struct ata_port *ap)
248 if (ap->ops->check_altstatus)
249 return ap->ops->check_altstatus(ap);
251 return ioread8(ap->ioaddr.altstatus_addr);
255 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
256 * @qc: Info associated with this ATA transaction.
259 * spin_lock_irqsave(host lock)
261 void ata_bmdma_setup(struct ata_queued_cmd *qc)
263 struct ata_port *ap = qc->ap;
264 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
267 /* load PRD table addr. */
268 mb(); /* make sure PRD table writes are visible to controller */
269 iowrite32(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
271 /* specify data direction, triple-check start bit is clear */
272 dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
273 dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
275 dmactl |= ATA_DMA_WR;
276 iowrite8(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
278 /* issue r/w command */
279 ap->ops->exec_command(ap, &qc->tf);
283 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
284 * @qc: Info associated with this ATA transaction.
287 * spin_lock_irqsave(host lock)
289 void ata_bmdma_start (struct ata_queued_cmd *qc)
291 struct ata_port *ap = qc->ap;
294 /* start host DMA transaction */
295 dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
296 iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
298 /* Strictly, one may wish to issue a readb() here, to
299 * flush the mmio write. However, control also passes
300 * to the hardware at this point, and it will interrupt
301 * us when we are to resume control. So, in effect,
302 * we don't care when the mmio write flushes.
303 * Further, a read of the DMA status register _immediately_
304 * following the write may not be what certain flaky hardware
305 * is expected, so I think it is best to not add a readb()
306 * without first all the MMIO ATA cards/mobos.
307 * Or maybe I'm just being paranoid.
312 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
313 * @ap: Port associated with this ATA transaction.
315 * Clear interrupt and error flags in DMA status register.
317 * May be used as the irq_clear() entry in ata_port_operations.
320 * spin_lock_irqsave(host lock)
322 void ata_bmdma_irq_clear(struct ata_port *ap)
324 void __iomem *mmio = ap->ioaddr.bmdma_addr;
329 iowrite8(ioread8(mmio + ATA_DMA_STATUS), mmio + ATA_DMA_STATUS);
333 * ata_bmdma_status - Read PCI IDE BMDMA status
334 * @ap: Port associated with this ATA transaction.
336 * Read and return BMDMA status register.
338 * May be used as the bmdma_status() entry in ata_port_operations.
341 * spin_lock_irqsave(host lock)
343 u8 ata_bmdma_status(struct ata_port *ap)
345 return ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
349 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
350 * @qc: Command we are ending DMA for
352 * Clears the ATA_DMA_START flag in the dma control register
354 * May be used as the bmdma_stop() entry in ata_port_operations.
357 * spin_lock_irqsave(host lock)
359 void ata_bmdma_stop(struct ata_queued_cmd *qc)
361 struct ata_port *ap = qc->ap;
362 void __iomem *mmio = ap->ioaddr.bmdma_addr;
364 /* clear start/stop bit */
365 iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
368 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
369 ata_altstatus(ap); /* dummy read */
373 * ata_bmdma_freeze - Freeze BMDMA controller port
374 * @ap: port to freeze
376 * Freeze BMDMA controller port.
379 * Inherited from caller.
381 void ata_bmdma_freeze(struct ata_port *ap)
383 struct ata_ioports *ioaddr = &ap->ioaddr;
386 ap->last_ctl = ap->ctl;
388 iowrite8(ap->ctl, ioaddr->ctl_addr);
390 /* Under certain circumstances, some controllers raise IRQ on
391 * ATA_NIEN manipulation. Also, many controllers fail to mask
392 * previously pending IRQ on ATA_NIEN assertion. Clear it.
396 ap->ops->irq_clear(ap);
400 * ata_bmdma_thaw - Thaw BMDMA controller port
403 * Thaw BMDMA controller port.
406 * Inherited from caller.
408 void ata_bmdma_thaw(struct ata_port *ap)
410 /* clear & re-enable interrupts */
412 ap->ops->irq_clear(ap);
417 * ata_bmdma_drive_eh - Perform EH with given methods for BMDMA controller
418 * @ap: port to handle error for
419 * @prereset: prereset method (can be NULL)
420 * @softreset: softreset method (can be NULL)
421 * @hardreset: hardreset method (can be NULL)
422 * @postreset: postreset method (can be NULL)
424 * Handle error for ATA BMDMA controller. It can handle both
425 * PATA and SATA controllers. Many controllers should be able to
426 * use this EH as-is or with some added handling before and
429 * This function is intended to be used for constructing
430 * ->error_handler callback by low level drivers.
433 * Kernel thread context (may sleep)
435 void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
436 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
437 ata_postreset_fn_t postreset)
439 struct ata_queued_cmd *qc;
443 qc = __ata_qc_from_tag(ap, ap->active_tag);
444 if (qc && !(qc->flags & ATA_QCFLAG_FAILED))
447 /* reset PIO HSM and stop DMA engine */
448 spin_lock_irqsave(ap->lock, flags);
450 ap->hsm_task_state = HSM_ST_IDLE;
452 if (qc && (qc->tf.protocol == ATA_PROT_DMA ||
453 qc->tf.protocol == ATA_PROT_ATAPI_DMA)) {
456 host_stat = ap->ops->bmdma_status(ap);
458 /* BMDMA controllers indicate host bus error by
459 * setting DMA_ERR bit and timing out. As it wasn't
460 * really a timeout event, adjust error mask and
461 * cancel frozen state.
463 if (qc->err_mask == AC_ERR_TIMEOUT && (host_stat & ATA_DMA_ERR)) {
464 qc->err_mask = AC_ERR_HOST_BUS;
468 ap->ops->bmdma_stop(qc);
473 ap->ops->irq_clear(ap);
475 spin_unlock_irqrestore(ap->lock, flags);
478 ata_eh_thaw_port(ap);
480 /* PIO and DMA engines have been stopped, perform recovery */
481 ata_do_eh(ap, prereset, softreset, hardreset, postreset);
485 * ata_bmdma_error_handler - Stock error handler for BMDMA controller
486 * @ap: port to handle error for
488 * Stock error handler for BMDMA controller.
491 * Kernel thread context (may sleep)
493 void ata_bmdma_error_handler(struct ata_port *ap)
495 ata_reset_fn_t hardreset;
498 if (sata_scr_valid(ap))
499 hardreset = sata_std_hardreset;
501 ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, hardreset,
506 * ata_bmdma_post_internal_cmd - Stock post_internal_cmd for
508 * @qc: internal command to clean up
511 * Kernel thread context (may sleep)
513 void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc)
515 if (qc->ap->ioaddr.bmdma_addr)
521 static int ata_resources_present(struct pci_dev *pdev, int port)
525 /* Check the PCI resources for this channel are enabled */
527 for (i = 0; i < 2; i ++) {
528 if (pci_resource_start(pdev, port + i) == 0 ||
529 pci_resource_len(pdev, port + i) == 0)
536 * ata_pci_init_native_mode - Initialize native-mode driver
537 * @pdev: pci device to be initialized
538 * @port: array[2] of pointers to port info structures.
539 * @ports: bitmap of ports present
541 * Utility function which allocates and initializes an
542 * ata_probe_ent structure for a standard dual-port
543 * PIO-based IDE controller. The returned ata_probe_ent
544 * structure can be passed to ata_device_add(). The returned
545 * ata_probe_ent structure should then be freed with kfree().
547 * The caller need only pass the address of the primary port, the
548 * secondary will be deduced automatically. If the device has non
549 * standard secondary port mappings this function can be called twice,
550 * once for each interface.
553 struct ata_probe_ent *
554 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
556 struct ata_probe_ent *probe_ent;
558 void __iomem * const *iomap;
561 for (i = 0; i < 4; i++) {
562 if (pcim_iomap(pdev, i, 0) == NULL) {
563 dev_printk(KERN_ERR, &pdev->dev,
564 "failed to iomap PCI BAR %d\n", i);
569 pcim_iomap(pdev, 4, 0); /* may fail */
570 iomap = pcim_iomap_table(pdev);
572 /* alloc and init probe_ent */
573 probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
577 probe_ent->irq = pdev->irq;
578 probe_ent->irq_flags = IRQF_SHARED;
580 /* Discard disabled ports. Some controllers show their
581 unused channels this way */
582 if (ata_resources_present(pdev, 0) == 0)
583 ports &= ~ATA_PORT_PRIMARY;
584 if (ata_resources_present(pdev, 1) == 0)
585 ports &= ~ATA_PORT_SECONDARY;
587 if (ports & ATA_PORT_PRIMARY) {
588 probe_ent->port[p].cmd_addr = iomap[0];
589 probe_ent->port[p].altstatus_addr =
590 probe_ent->port[p].ctl_addr = (void __iomem *)
591 ((unsigned long)iomap[1] | ATA_PCI_CTL_OFS);
593 if ((!(port[p]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
594 (ioread8(iomap[4] + 2) & 0x80))
595 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
596 probe_ent->port[p].bmdma_addr = iomap[4];
598 ata_std_ports(&probe_ent->port[p]);
602 if (ports & ATA_PORT_SECONDARY) {
603 probe_ent->port[p].cmd_addr = iomap[2];
604 probe_ent->port[p].altstatus_addr =
605 probe_ent->port[p].ctl_addr = (void __iomem *)
606 ((unsigned long)iomap[3] | ATA_PCI_CTL_OFS);
608 if ((!(port[p]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
609 (ioread8(iomap[4] + 10) & 0x80))
610 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
611 probe_ent->port[p].bmdma_addr = iomap[4] + 8;
613 ata_std_ports(&probe_ent->port[p]);
614 probe_ent->pinfo2 = port[1];
618 probe_ent->n_ports = p;
622 static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
623 struct ata_port_info **port, int port_mask)
625 struct ata_probe_ent *probe_ent;
626 void __iomem *iomap[5] = { }, *bmdma;
628 if (port_mask & ATA_PORT_PRIMARY) {
629 iomap[0] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CMD, 8);
630 iomap[1] = devm_ioport_map(&pdev->dev, ATA_PRIMARY_CTL, 1);
631 if (!iomap[0] || !iomap[1])
635 if (port_mask & ATA_PORT_SECONDARY) {
636 iomap[2] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CMD, 8);
637 iomap[3] = devm_ioport_map(&pdev->dev, ATA_SECONDARY_CTL, 1);
638 if (!iomap[2] || !iomap[3])
642 bmdma = pcim_iomap(pdev, 4, 16); /* may fail */
644 /* alloc and init probe_ent */
645 probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
649 probe_ent->n_ports = 2;
650 probe_ent->irq_flags = IRQF_SHARED;
652 if (port_mask & ATA_PORT_PRIMARY) {
653 probe_ent->irq = ATA_PRIMARY_IRQ(pdev);
654 probe_ent->port[0].cmd_addr = iomap[0];
655 probe_ent->port[0].altstatus_addr =
656 probe_ent->port[0].ctl_addr = iomap[1];
658 probe_ent->port[0].bmdma_addr = bmdma;
659 if ((!(port[0]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
660 (ioread8(bmdma + 2) & 0x80))
661 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
663 ata_std_ports(&probe_ent->port[0]);
665 probe_ent->dummy_port_mask |= ATA_PORT_PRIMARY;
667 if (port_mask & ATA_PORT_SECONDARY) {
669 probe_ent->irq2 = ATA_SECONDARY_IRQ(pdev);
671 probe_ent->irq = ATA_SECONDARY_IRQ(pdev);
672 probe_ent->port[1].cmd_addr = iomap[2];
673 probe_ent->port[1].altstatus_addr =
674 probe_ent->port[1].ctl_addr = iomap[3];
676 probe_ent->port[1].bmdma_addr = bmdma + 8;
677 if ((!(port[1]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
678 (ioread8(bmdma + 10) & 0x80))
679 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
681 ata_std_ports(&probe_ent->port[1]);
683 /* FIXME: could be pointing to stack area; must copy */
684 probe_ent->pinfo2 = port[1];
686 probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY;
693 * ata_pci_init_one - Initialize/register PCI IDE host controller
694 * @pdev: Controller to be initialized
695 * @port_info: Information from low-level host driver
696 * @n_ports: Number of ports attached to host controller
698 * This is a helper function which can be called from a driver's
699 * xxx_init_one() probe function if the hardware uses traditional
700 * IDE taskfile registers.
702 * This function calls pci_enable_device(), reserves its register
703 * regions, sets the dma mask, enables bus master mode, and calls
707 * Nobody makes a single channel controller that appears solely as
708 * the secondary legacy port on PCI.
711 * Inherited from PCI layer (may sleep).
714 * Zero on success, negative on errno-based value on error.
717 int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
718 unsigned int n_ports)
720 struct device *dev = &pdev->dev;
721 struct ata_probe_ent *probe_ent = NULL;
722 struct ata_port_info *port[2];
724 unsigned int legacy_mode = 0;
729 if (!devres_open_group(dev, NULL, GFP_KERNEL))
732 BUG_ON(n_ports < 1 || n_ports > 2);
734 port[0] = port_info[0];
736 port[1] = port_info[1];
740 /* FIXME: Really for ATA it isn't safe because the device may be
741 multi-purpose and we want to leave it alone if it was already
742 enabled. Secondly for shared use as Arjan says we want refcounting
744 Checking dev->is_enabled is insufficient as this is not set at
745 boot for the primary video which is BIOS enabled
748 rc = pcim_enable_device(pdev);
752 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
755 /* TODO: What if one channel is in native mode ... */
756 pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
757 mask = (1 << 2) | (1 << 0);
758 if ((tmp8 & mask) != mask)
759 legacy_mode = (1 << 3);
760 #if defined(CONFIG_NO_ATA_LEGACY)
761 /* Some platforms with PCI limits cannot address compat
762 port space. In that case we punt if their firmware has
763 left a device in compatibility mode */
765 printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n");
773 rc = pci_request_regions(pdev, DRV_NAME);
775 pcim_pin_device(pdev);
779 /* Deal with combined mode hack. This side of the logic all
780 goes away once the combined mode hack is killed in 2.6.21 */
781 if (!devm_request_region(dev, ATA_PRIMARY_CMD, 8, "libata")) {
782 struct resource *conflict, res;
783 res.start = ATA_PRIMARY_CMD;
784 res.end = ATA_PRIMARY_CMD + 8 - 1;
785 conflict = ____request_resource(&ioport_resource, &res);
786 while (conflict->child)
787 conflict = ____request_resource(conflict, &res);
788 if (!strcmp(conflict->name, "libata"))
789 legacy_mode |= ATA_PORT_PRIMARY;
791 pcim_pin_device(pdev);
792 printk(KERN_WARNING "ata: 0x%0X IDE port busy\n" \
793 "ata: conflict with %s\n",
798 legacy_mode |= ATA_PORT_PRIMARY;
800 if (!devm_request_region(dev, ATA_SECONDARY_CMD, 8, "libata")) {
801 struct resource *conflict, res;
802 res.start = ATA_SECONDARY_CMD;
803 res.end = ATA_SECONDARY_CMD + 8 - 1;
804 conflict = ____request_resource(&ioport_resource, &res);
805 while (conflict->child)
806 conflict = ____request_resource(conflict, &res);
807 if (!strcmp(conflict->name, "libata"))
808 legacy_mode |= ATA_PORT_SECONDARY;
810 pcim_pin_device(pdev);
811 printk(KERN_WARNING "ata: 0x%X IDE port busy\n" \
812 "ata: conflict with %s\n",
817 legacy_mode |= ATA_PORT_SECONDARY;
819 if (legacy_mode & ATA_PORT_PRIMARY)
820 pci_request_region(pdev, 1, DRV_NAME);
821 if (legacy_mode & ATA_PORT_SECONDARY)
822 pci_request_region(pdev, 3, DRV_NAME);
823 /* If there is a DMA resource, allocate it */
824 pci_request_region(pdev, 4, DRV_NAME);
827 /* we have legacy mode, but all ports are unavailable */
828 if (legacy_mode == (1 << 3)) {
833 /* TODO: If we get no DMA mask we should fall back to PIO */
834 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
837 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
842 probe_ent = ata_pci_init_legacy_port(pdev, port, legacy_mode);
845 probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
847 probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
854 pci_set_master(pdev);
856 if (!ata_device_add(probe_ent)) {
861 devm_kfree(dev, probe_ent);
862 devres_remove_group(dev, NULL);
866 devres_release_group(dev, NULL);
871 * ata_pci_clear_simplex - attempt to kick device out of simplex
874 * Some PCI ATA devices report simplex mode but in fact can be told to
875 * enter non simplex mode. This implements the neccessary logic to
876 * perform the task on such devices. Calling it on other devices will
877 * have -undefined- behaviour.
880 int ata_pci_clear_simplex(struct pci_dev *pdev)
882 unsigned long bmdma = pci_resource_start(pdev, 4);
888 simplex = inb(bmdma + 0x02);
889 outb(simplex & 0x60, bmdma + 0x02);
890 simplex = inb(bmdma + 0x02);
896 unsigned long ata_pci_default_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long xfer_mask)
898 /* Filter out DMA modes if the device has been configured by
899 the BIOS as PIO only */
901 if (ap->ioaddr.bmdma_addr == 0)
902 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
906 #endif /* CONFIG_PCI */