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 if (ap
->flags
& ATA_FLAG_MMIO
)
60 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
62 outb(ap
->ctl
, ioaddr
->ctl_addr
);
63 tmp
= ata_wait_idle(ap
);
65 ap
->ops
->irq_clear(ap
);
71 * ata_tf_load_pio - send taskfile registers to host controller
72 * @ap: Port to which output is sent
73 * @tf: ATA taskfile register set
75 * Outputs ATA taskfile to standard ATA host controller.
78 * Inherited from caller.
81 static void ata_tf_load_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
83 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
84 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
86 if (tf
->ctl
!= ap
->last_ctl
) {
87 outb(tf
->ctl
, ioaddr
->ctl_addr
);
88 ap
->last_ctl
= tf
->ctl
;
92 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
93 outb(tf
->hob_feature
, ioaddr
->feature_addr
);
94 outb(tf
->hob_nsect
, ioaddr
->nsect_addr
);
95 outb(tf
->hob_lbal
, ioaddr
->lbal_addr
);
96 outb(tf
->hob_lbam
, ioaddr
->lbam_addr
);
97 outb(tf
->hob_lbah
, ioaddr
->lbah_addr
);
98 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
107 outb(tf
->feature
, ioaddr
->feature_addr
);
108 outb(tf
->nsect
, ioaddr
->nsect_addr
);
109 outb(tf
->lbal
, ioaddr
->lbal_addr
);
110 outb(tf
->lbam
, ioaddr
->lbam_addr
);
111 outb(tf
->lbah
, ioaddr
->lbah_addr
);
112 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
120 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
121 outb(tf
->device
, ioaddr
->device_addr
);
122 VPRINTK("device 0x%X\n", tf
->device
);
129 * ata_tf_load_mmio - send taskfile registers to host controller
130 * @ap: Port to which output is sent
131 * @tf: ATA taskfile register set
133 * Outputs ATA taskfile to standard ATA host controller using MMIO.
136 * Inherited from caller.
139 static void ata_tf_load_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
141 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
142 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
144 if (tf
->ctl
!= ap
->last_ctl
) {
145 writeb(tf
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
146 ap
->last_ctl
= tf
->ctl
;
150 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
151 writeb(tf
->hob_feature
, (void __iomem
*) ioaddr
->feature_addr
);
152 writeb(tf
->hob_nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
153 writeb(tf
->hob_lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
154 writeb(tf
->hob_lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
155 writeb(tf
->hob_lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
156 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
165 writeb(tf
->feature
, (void __iomem
*) ioaddr
->feature_addr
);
166 writeb(tf
->nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
167 writeb(tf
->lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
168 writeb(tf
->lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
169 writeb(tf
->lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
170 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
178 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
179 writeb(tf
->device
, (void __iomem
*) ioaddr
->device_addr
);
180 VPRINTK("device 0x%X\n", tf
->device
);
188 * ata_tf_load - send taskfile registers to host controller
189 * @ap: Port to which output is sent
190 * @tf: ATA taskfile register set
192 * Outputs ATA taskfile to standard ATA host controller using MMIO
193 * or PIO as indicated by the ATA_FLAG_MMIO flag.
194 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
195 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
196 * hob_lbal, hob_lbam, and hob_lbah.
198 * This function waits for idle (!BUSY and !DRQ) after writing
199 * registers. If the control register has a new value, this
200 * function also waits for idle after writing control and before
201 * writing the remaining registers.
203 * May be used as the tf_load() entry in ata_port_operations.
206 * Inherited from caller.
208 void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
210 if (ap
->flags
& ATA_FLAG_MMIO
)
211 ata_tf_load_mmio(ap
, tf
);
213 ata_tf_load_pio(ap
, tf
);
217 * ata_exec_command_pio - issue ATA command to host controller
218 * @ap: port to which command is being issued
219 * @tf: ATA taskfile register set
221 * Issues PIO write to ATA command register, with proper
222 * synchronization with interrupt handler / other threads.
225 * spin_lock_irqsave(host lock)
228 static void ata_exec_command_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
230 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
232 outb(tf
->command
, ap
->ioaddr
.command_addr
);
238 * ata_exec_command_mmio - issue ATA command to host controller
239 * @ap: port to which command is being issued
240 * @tf: ATA taskfile register set
242 * Issues MMIO write to ATA command register, with proper
243 * synchronization with interrupt handler / other threads.
245 * FIXME: missing write posting for 400nS delay enforcement
248 * spin_lock_irqsave(host lock)
251 static void ata_exec_command_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
253 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
255 writeb(tf
->command
, (void __iomem
*) ap
->ioaddr
.command_addr
);
261 * ata_exec_command - issue ATA command to host controller
262 * @ap: port to which command is being issued
263 * @tf: ATA taskfile register set
265 * Issues PIO/MMIO write to ATA command register, with proper
266 * synchronization with interrupt handler / other threads.
269 * spin_lock_irqsave(host lock)
271 void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
273 if (ap
->flags
& ATA_FLAG_MMIO
)
274 ata_exec_command_mmio(ap
, tf
);
276 ata_exec_command_pio(ap
, tf
);
280 * ata_tf_read_pio - input device's ATA taskfile shadow registers
281 * @ap: Port from which input is read
282 * @tf: ATA taskfile register set for storing input
284 * Reads ATA taskfile registers for currently-selected device
288 * Inherited from caller.
291 static void ata_tf_read_pio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
293 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
295 tf
->command
= ata_check_status(ap
);
296 tf
->feature
= inb(ioaddr
->error_addr
);
297 tf
->nsect
= inb(ioaddr
->nsect_addr
);
298 tf
->lbal
= inb(ioaddr
->lbal_addr
);
299 tf
->lbam
= inb(ioaddr
->lbam_addr
);
300 tf
->lbah
= inb(ioaddr
->lbah_addr
);
301 tf
->device
= inb(ioaddr
->device_addr
);
303 if (tf
->flags
& ATA_TFLAG_LBA48
) {
304 outb(tf
->ctl
| ATA_HOB
, ioaddr
->ctl_addr
);
305 tf
->hob_feature
= inb(ioaddr
->error_addr
);
306 tf
->hob_nsect
= inb(ioaddr
->nsect_addr
);
307 tf
->hob_lbal
= inb(ioaddr
->lbal_addr
);
308 tf
->hob_lbam
= inb(ioaddr
->lbam_addr
);
309 tf
->hob_lbah
= inb(ioaddr
->lbah_addr
);
314 * ata_tf_read_mmio - input device's ATA taskfile shadow registers
315 * @ap: Port from which input is read
316 * @tf: ATA taskfile register set for storing input
318 * Reads ATA taskfile registers for currently-selected device
322 * Inherited from caller.
325 static void ata_tf_read_mmio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
327 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
329 tf
->command
= ata_check_status(ap
);
330 tf
->feature
= readb((void __iomem
*)ioaddr
->error_addr
);
331 tf
->nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
332 tf
->lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
333 tf
->lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
334 tf
->lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
335 tf
->device
= readb((void __iomem
*)ioaddr
->device_addr
);
337 if (tf
->flags
& ATA_TFLAG_LBA48
) {
338 writeb(tf
->ctl
| ATA_HOB
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
339 tf
->hob_feature
= readb((void __iomem
*)ioaddr
->error_addr
);
340 tf
->hob_nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
341 tf
->hob_lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
342 tf
->hob_lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
343 tf
->hob_lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
349 * ata_tf_read - input device's ATA taskfile shadow registers
350 * @ap: Port from which input is read
351 * @tf: ATA taskfile register set for storing input
353 * Reads ATA taskfile registers for currently-selected device
356 * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
357 * is set, also reads the hob registers.
359 * May be used as the tf_read() entry in ata_port_operations.
362 * Inherited from caller.
364 void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
366 if (ap
->flags
& ATA_FLAG_MMIO
)
367 ata_tf_read_mmio(ap
, tf
);
369 ata_tf_read_pio(ap
, tf
);
373 * ata_check_status_pio - Read device status reg & clear interrupt
374 * @ap: port where the device is
376 * Reads ATA taskfile status register for currently-selected device
377 * and return its value. This also clears pending interrupts
381 * Inherited from caller.
383 static u8
ata_check_status_pio(struct ata_port
*ap
)
385 return inb(ap
->ioaddr
.status_addr
);
389 * ata_check_status_mmio - Read device status reg & clear interrupt
390 * @ap: port where the device is
392 * Reads ATA taskfile status register for currently-selected device
393 * via MMIO and return its value. This also clears pending interrupts
397 * Inherited from caller.
399 static u8
ata_check_status_mmio(struct ata_port
*ap
)
401 return readb((void __iomem
*) ap
->ioaddr
.status_addr
);
406 * ata_check_status - Read device status reg & clear interrupt
407 * @ap: port where the device is
409 * Reads ATA taskfile status register for currently-selected device
410 * and return its value. This also clears pending interrupts
413 * May be used as the check_status() entry in ata_port_operations.
416 * Inherited from caller.
418 u8
ata_check_status(struct ata_port
*ap
)
420 if (ap
->flags
& ATA_FLAG_MMIO
)
421 return ata_check_status_mmio(ap
);
422 return ata_check_status_pio(ap
);
427 * ata_altstatus - Read device alternate status reg
428 * @ap: port where the device is
430 * Reads ATA taskfile alternate status register for
431 * currently-selected device and return its value.
433 * Note: may NOT be used as the check_altstatus() entry in
434 * ata_port_operations.
437 * Inherited from caller.
439 u8
ata_altstatus(struct ata_port
*ap
)
441 if (ap
->ops
->check_altstatus
)
442 return ap
->ops
->check_altstatus(ap
);
444 if (ap
->flags
& ATA_FLAG_MMIO
)
445 return readb((void __iomem
*)ap
->ioaddr
.altstatus_addr
);
446 return inb(ap
->ioaddr
.altstatus_addr
);
450 * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
451 * @qc: Info associated with this ATA transaction.
454 * spin_lock_irqsave(host lock)
457 static void ata_bmdma_setup_mmio (struct ata_queued_cmd
*qc
)
459 struct ata_port
*ap
= qc
->ap
;
460 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
462 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
464 /* load PRD table addr. */
465 mb(); /* make sure PRD table writes are visible to controller */
466 writel(ap
->prd_dma
, mmio
+ ATA_DMA_TABLE_OFS
);
468 /* specify data direction, triple-check start bit is clear */
469 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
470 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
472 dmactl
|= ATA_DMA_WR
;
473 writeb(dmactl
, mmio
+ ATA_DMA_CMD
);
475 /* issue r/w command */
476 ap
->ops
->exec_command(ap
, &qc
->tf
);
480 * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
481 * @qc: Info associated with this ATA transaction.
484 * spin_lock_irqsave(host lock)
487 static void ata_bmdma_start_mmio (struct ata_queued_cmd
*qc
)
489 struct ata_port
*ap
= qc
->ap
;
490 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
493 /* start host DMA transaction */
494 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
495 writeb(dmactl
| ATA_DMA_START
, mmio
+ ATA_DMA_CMD
);
497 /* Strictly, one may wish to issue a readb() here, to
498 * flush the mmio write. However, control also passes
499 * to the hardware at this point, and it will interrupt
500 * us when we are to resume control. So, in effect,
501 * we don't care when the mmio write flushes.
502 * Further, a read of the DMA status register _immediately_
503 * following the write may not be what certain flaky hardware
504 * is expected, so I think it is best to not add a readb()
505 * without first all the MMIO ATA cards/mobos.
506 * Or maybe I'm just being paranoid.
511 * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
512 * @qc: Info associated with this ATA transaction.
515 * spin_lock_irqsave(host lock)
518 static void ata_bmdma_setup_pio (struct ata_queued_cmd
*qc
)
520 struct ata_port
*ap
= qc
->ap
;
521 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
524 /* load PRD table addr. */
525 outl(ap
->prd_dma
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_TABLE_OFS
);
527 /* specify data direction, triple-check start bit is clear */
528 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
529 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
531 dmactl
|= ATA_DMA_WR
;
532 outb(dmactl
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
534 /* issue r/w command */
535 ap
->ops
->exec_command(ap
, &qc
->tf
);
539 * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
540 * @qc: Info associated with this ATA transaction.
543 * spin_lock_irqsave(host lock)
546 static void ata_bmdma_start_pio (struct ata_queued_cmd
*qc
)
548 struct ata_port
*ap
= qc
->ap
;
551 /* start host DMA transaction */
552 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
553 outb(dmactl
| ATA_DMA_START
,
554 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
559 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
560 * @qc: Info associated with this ATA transaction.
562 * Writes the ATA_DMA_START flag to the DMA command register.
564 * May be used as the bmdma_start() entry in ata_port_operations.
567 * spin_lock_irqsave(host lock)
569 void ata_bmdma_start(struct ata_queued_cmd
*qc
)
571 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
572 ata_bmdma_start_mmio(qc
);
574 ata_bmdma_start_pio(qc
);
579 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
580 * @qc: Info associated with this ATA transaction.
582 * Writes address of PRD table to device's PRD Table Address
583 * register, sets the DMA control register, and calls
584 * ops->exec_command() to start the transfer.
586 * May be used as the bmdma_setup() entry in ata_port_operations.
589 * spin_lock_irqsave(host lock)
591 void ata_bmdma_setup(struct ata_queued_cmd
*qc
)
593 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
594 ata_bmdma_setup_mmio(qc
);
596 ata_bmdma_setup_pio(qc
);
601 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
602 * @ap: Port associated with this ATA transaction.
604 * Clear interrupt and error flags in DMA status register.
606 * May be used as the irq_clear() entry in ata_port_operations.
609 * spin_lock_irqsave(host lock)
612 void ata_bmdma_irq_clear(struct ata_port
*ap
)
614 if (!ap
->ioaddr
.bmdma_addr
)
617 if (ap
->flags
& ATA_FLAG_MMIO
) {
619 ((void __iomem
*) ap
->ioaddr
.bmdma_addr
) + ATA_DMA_STATUS
;
620 writeb(readb(mmio
), mmio
);
622 unsigned long addr
= ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
;
623 outb(inb(addr
), addr
);
629 * ata_bmdma_status - Read PCI IDE BMDMA status
630 * @ap: Port associated with this ATA transaction.
632 * Read and return BMDMA status register.
634 * May be used as the bmdma_status() entry in ata_port_operations.
637 * spin_lock_irqsave(host lock)
640 u8
ata_bmdma_status(struct ata_port
*ap
)
643 if (ap
->flags
& ATA_FLAG_MMIO
) {
644 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
645 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
647 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
653 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
654 * @qc: Command we are ending DMA for
656 * Clears the ATA_DMA_START flag in the dma control register
658 * May be used as the bmdma_stop() entry in ata_port_operations.
661 * spin_lock_irqsave(host lock)
664 void ata_bmdma_stop(struct ata_queued_cmd
*qc
)
666 struct ata_port
*ap
= qc
->ap
;
667 if (ap
->flags
& ATA_FLAG_MMIO
) {
668 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
670 /* clear start/stop bit */
671 writeb(readb(mmio
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
674 /* clear start/stop bit */
675 outb(inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
676 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
679 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
680 ata_altstatus(ap
); /* dummy read */
684 * ata_bmdma_freeze - Freeze BMDMA controller port
685 * @ap: port to freeze
687 * Freeze BMDMA controller port.
690 * Inherited from caller.
692 void ata_bmdma_freeze(struct ata_port
*ap
)
694 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
697 ap
->last_ctl
= ap
->ctl
;
699 if (ap
->flags
& ATA_FLAG_MMIO
)
700 writeb(ap
->ctl
, (void __iomem
*)ioaddr
->ctl_addr
);
702 outb(ap
->ctl
, ioaddr
->ctl_addr
);
704 /* Under certain circumstances, some controllers raise IRQ on
705 * ATA_NIEN manipulation. Also, many controllers fail to mask
706 * previously pending IRQ on ATA_NIEN assertion. Clear it.
710 ap
->ops
->irq_clear(ap
);
714 * ata_bmdma_thaw - Thaw BMDMA controller port
717 * Thaw BMDMA controller port.
720 * Inherited from caller.
722 void ata_bmdma_thaw(struct ata_port
*ap
)
724 /* clear & re-enable interrupts */
726 ap
->ops
->irq_clear(ap
);
727 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
732 * ata_bmdma_drive_eh - Perform EH with given methods for BMDMA controller
733 * @ap: port to handle error for
734 * @prereset: prereset method (can be NULL)
735 * @softreset: softreset method (can be NULL)
736 * @hardreset: hardreset method (can be NULL)
737 * @postreset: postreset method (can be NULL)
739 * Handle error for ATA BMDMA controller. It can handle both
740 * PATA and SATA controllers. Many controllers should be able to
741 * use this EH as-is or with some added handling before and
744 * This function is intended to be used for constructing
745 * ->error_handler callback by low level drivers.
748 * Kernel thread context (may sleep)
750 void ata_bmdma_drive_eh(struct ata_port
*ap
, ata_prereset_fn_t prereset
,
751 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
752 ata_postreset_fn_t postreset
)
754 struct ata_queued_cmd
*qc
;
758 qc
= __ata_qc_from_tag(ap
, ap
->active_tag
);
759 if (qc
&& !(qc
->flags
& ATA_QCFLAG_FAILED
))
762 /* reset PIO HSM and stop DMA engine */
763 spin_lock_irqsave(ap
->lock
, flags
);
765 ap
->hsm_task_state
= HSM_ST_IDLE
;
767 if (qc
&& (qc
->tf
.protocol
== ATA_PROT_DMA
||
768 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)) {
771 host_stat
= ap
->ops
->bmdma_status(ap
);
773 /* BMDMA controllers indicate host bus error by
774 * setting DMA_ERR bit and timing out. As it wasn't
775 * really a timeout event, adjust error mask and
776 * cancel frozen state.
778 if (qc
->err_mask
== AC_ERR_TIMEOUT
&& (host_stat
& ATA_DMA_ERR
)) {
779 qc
->err_mask
= AC_ERR_HOST_BUS
;
783 ap
->ops
->bmdma_stop(qc
);
788 ap
->ops
->irq_clear(ap
);
790 spin_unlock_irqrestore(ap
->lock
, flags
);
793 ata_eh_thaw_port(ap
);
795 /* PIO and DMA engines have been stopped, perform recovery */
796 ata_do_eh(ap
, prereset
, softreset
, hardreset
, postreset
);
800 * ata_bmdma_error_handler - Stock error handler for BMDMA controller
801 * @ap: port to handle error for
803 * Stock error handler for BMDMA controller.
806 * Kernel thread context (may sleep)
808 void ata_bmdma_error_handler(struct ata_port
*ap
)
810 ata_reset_fn_t hardreset
;
813 if (sata_scr_valid(ap
))
814 hardreset
= sata_std_hardreset
;
816 ata_bmdma_drive_eh(ap
, ata_std_prereset
, ata_std_softreset
, hardreset
,
821 * ata_bmdma_post_internal_cmd - Stock post_internal_cmd for
823 * @qc: internal command to clean up
826 * Kernel thread context (may sleep)
828 void ata_bmdma_post_internal_cmd(struct ata_queued_cmd
*qc
)
830 if (qc
->ap
->ioaddr
.bmdma_addr
)
836 static int ata_resources_present(struct pci_dev
*pdev
, int port
)
840 /* Check the PCI resources for this channel are enabled */
842 for (i
= 0; i
< 2; i
++) {
843 if (pci_resource_start(pdev
, port
+ i
) == 0 ||
844 pci_resource_len(pdev
, port
+ i
) == 0)
851 * ata_pci_init_native_mode - Initialize native-mode driver
852 * @pdev: pci device to be initialized
853 * @port: array[2] of pointers to port info structures.
854 * @ports: bitmap of ports present
856 * Utility function which allocates and initializes an
857 * ata_probe_ent structure for a standard dual-port
858 * PIO-based IDE controller. The returned ata_probe_ent
859 * structure can be passed to ata_device_add(). The returned
860 * ata_probe_ent structure should then be freed with kfree().
862 * The caller need only pass the address of the primary port, the
863 * secondary will be deduced automatically. If the device has non
864 * standard secondary port mappings this function can be called twice,
865 * once for each interface.
868 struct ata_probe_ent
*
869 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int ports
)
871 struct ata_probe_ent
*probe_ent
=
872 ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
879 probe_ent
->irq
= pdev
->irq
;
880 probe_ent
->irq_flags
= IRQF_SHARED
;
882 /* Discard disabled ports. Some controllers show their
883 unused channels this way */
884 if (ata_resources_present(pdev
, 0) == 0)
885 ports
&= ~ATA_PORT_PRIMARY
;
886 if (ata_resources_present(pdev
, 1) == 0)
887 ports
&= ~ATA_PORT_SECONDARY
;
889 if (ports
& ATA_PORT_PRIMARY
) {
890 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 0);
891 probe_ent
->port
[p
].altstatus_addr
=
892 probe_ent
->port
[p
].ctl_addr
=
893 pci_resource_start(pdev
, 1) | ATA_PCI_CTL_OFS
;
894 bmdma
= pci_resource_start(pdev
, 4);
896 if ((!(port
[p
]->flags
& ATA_FLAG_IGN_SIMPLEX
)) &&
897 (inb(bmdma
+ 2) & 0x80))
898 probe_ent
->_host_flags
|= ATA_HOST_SIMPLEX
;
899 probe_ent
->port
[p
].bmdma_addr
= bmdma
;
901 ata_std_ports(&probe_ent
->port
[p
]);
905 if (ports
& ATA_PORT_SECONDARY
) {
906 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 2);
907 probe_ent
->port
[p
].altstatus_addr
=
908 probe_ent
->port
[p
].ctl_addr
=
909 pci_resource_start(pdev
, 3) | ATA_PCI_CTL_OFS
;
910 bmdma
= pci_resource_start(pdev
, 4);
913 if ((!(port
[p
]->flags
& ATA_FLAG_IGN_SIMPLEX
)) &&
914 (inb(bmdma
+ 2) & 0x80))
915 probe_ent
->_host_flags
|= ATA_HOST_SIMPLEX
;
916 probe_ent
->port
[p
].bmdma_addr
= bmdma
;
918 ata_std_ports(&probe_ent
->port
[p
]);
919 probe_ent
->pinfo2
= port
[1];
923 probe_ent
->n_ports
= p
;
928 static struct ata_probe_ent
*ata_pci_init_legacy_port(struct pci_dev
*pdev
,
929 struct ata_port_info
**port
, int port_mask
)
931 struct ata_probe_ent
*probe_ent
;
932 unsigned long bmdma
= pci_resource_start(pdev
, 4);
934 probe_ent
= ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
938 probe_ent
->n_ports
= 2;
939 probe_ent
->irq_flags
= IRQF_SHARED
;
941 if (port_mask
& ATA_PORT_PRIMARY
) {
942 probe_ent
->irq
= ATA_PRIMARY_IRQ(pdev
);
943 probe_ent
->port
[0].cmd_addr
= ATA_PRIMARY_CMD
;
944 probe_ent
->port
[0].altstatus_addr
=
945 probe_ent
->port
[0].ctl_addr
= ATA_PRIMARY_CTL
;
947 probe_ent
->port
[0].bmdma_addr
= bmdma
;
948 if ((!(port
[0]->flags
& ATA_FLAG_IGN_SIMPLEX
)) &&
949 (inb(bmdma
+ 2) & 0x80))
950 probe_ent
->_host_flags
|= ATA_HOST_SIMPLEX
;
952 ata_std_ports(&probe_ent
->port
[0]);
954 probe_ent
->dummy_port_mask
|= ATA_PORT_PRIMARY
;
956 if (port_mask
& ATA_PORT_SECONDARY
) {
958 probe_ent
->irq2
= ATA_SECONDARY_IRQ(pdev
);
960 probe_ent
->irq
= ATA_SECONDARY_IRQ(pdev
);
961 probe_ent
->port
[1].cmd_addr
= ATA_SECONDARY_CMD
;
962 probe_ent
->port
[1].altstatus_addr
=
963 probe_ent
->port
[1].ctl_addr
= ATA_SECONDARY_CTL
;
965 probe_ent
->port
[1].bmdma_addr
= bmdma
+ 8;
966 if ((!(port
[1]->flags
& ATA_FLAG_IGN_SIMPLEX
)) &&
967 (inb(bmdma
+ 10) & 0x80))
968 probe_ent
->_host_flags
|= ATA_HOST_SIMPLEX
;
970 ata_std_ports(&probe_ent
->port
[1]);
972 /* FIXME: could be pointing to stack area; must copy */
973 probe_ent
->pinfo2
= port
[1];
975 probe_ent
->dummy_port_mask
|= ATA_PORT_SECONDARY
;
982 * ata_pci_init_one - Initialize/register PCI IDE host controller
983 * @pdev: Controller to be initialized
984 * @port_info: Information from low-level host driver
985 * @n_ports: Number of ports attached to host controller
987 * This is a helper function which can be called from a driver's
988 * xxx_init_one() probe function if the hardware uses traditional
989 * IDE taskfile registers.
991 * This function calls pci_enable_device(), reserves its register
992 * regions, sets the dma mask, enables bus master mode, and calls
996 * Nobody makes a single channel controller that appears solely as
997 * the secondary legacy port on PCI.
1000 * Inherited from PCI layer (may sleep).
1003 * Zero on success, negative on errno-based value on error.
1006 int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
1007 unsigned int n_ports
)
1009 struct device
*dev
= &pdev
->dev
;
1010 struct ata_probe_ent
*probe_ent
= NULL
;
1011 struct ata_port_info
*port
[2];
1013 unsigned int legacy_mode
= 0;
1018 if (!devres_open_group(dev
, NULL
, GFP_KERNEL
))
1021 BUG_ON(n_ports
< 1 || n_ports
> 2);
1023 port
[0] = port_info
[0];
1025 port
[1] = port_info
[1];
1029 /* FIXME: Really for ATA it isn't safe because the device may be
1030 multi-purpose and we want to leave it alone if it was already
1031 enabled. Secondly for shared use as Arjan says we want refcounting
1033 Checking dev->is_enabled is insufficient as this is not set at
1034 boot for the primary video which is BIOS enabled
1037 rc
= pcim_enable_device(pdev
);
1041 if ((pdev
->class >> 8) == PCI_CLASS_STORAGE_IDE
) {
1044 /* TODO: What if one channel is in native mode ... */
1045 pci_read_config_byte(pdev
, PCI_CLASS_PROG
, &tmp8
);
1046 mask
= (1 << 2) | (1 << 0);
1047 if ((tmp8
& mask
) != mask
)
1048 legacy_mode
= (1 << 3);
1049 #if defined(CONFIG_NO_ATA_LEGACY)
1050 /* Some platforms with PCI limits cannot address compat
1051 port space. In that case we punt if their firmware has
1052 left a device in compatibility mode */
1054 printk(KERN_ERR
"ata: Compatibility mode ATA is not supported on this platform, skipping.\n");
1062 rc
= pci_request_regions(pdev
, DRV_NAME
);
1064 pcim_pin_device(pdev
);
1068 /* Deal with combined mode hack. This side of the logic all
1069 goes away once the combined mode hack is killed in 2.6.21 */
1070 if (!devm_request_region(dev
, ATA_PRIMARY_CMD
, 8, "libata")) {
1071 struct resource
*conflict
, res
;
1072 res
.start
= ATA_PRIMARY_CMD
;
1073 res
.end
= ATA_PRIMARY_CMD
+ 8 - 1;
1074 conflict
= ____request_resource(&ioport_resource
, &res
);
1075 while (conflict
->child
)
1076 conflict
= ____request_resource(conflict
, &res
);
1077 if (!strcmp(conflict
->name
, "libata"))
1078 legacy_mode
|= ATA_PORT_PRIMARY
;
1080 pcim_pin_device(pdev
);
1081 printk(KERN_WARNING
"ata: 0x%0X IDE port busy\n" \
1082 "ata: conflict with %s\n",
1087 legacy_mode
|= ATA_PORT_PRIMARY
;
1089 if (!devm_request_region(dev
, ATA_SECONDARY_CMD
, 8, "libata")) {
1090 struct resource
*conflict
, res
;
1091 res
.start
= ATA_SECONDARY_CMD
;
1092 res
.end
= ATA_SECONDARY_CMD
+ 8 - 1;
1093 conflict
= ____request_resource(&ioport_resource
, &res
);
1094 while (conflict
->child
)
1095 conflict
= ____request_resource(conflict
, &res
);
1096 if (!strcmp(conflict
->name
, "libata"))
1097 legacy_mode
|= ATA_PORT_SECONDARY
;
1099 pcim_pin_device(pdev
);
1100 printk(KERN_WARNING
"ata: 0x%X IDE port busy\n" \
1101 "ata: conflict with %s\n",
1106 legacy_mode
|= ATA_PORT_SECONDARY
;
1108 if (legacy_mode
& ATA_PORT_PRIMARY
)
1109 pci_request_region(pdev
, 1, DRV_NAME
);
1110 if (legacy_mode
& ATA_PORT_SECONDARY
)
1111 pci_request_region(pdev
, 3, DRV_NAME
);
1112 /* If there is a DMA resource, allocate it */
1113 pci_request_region(pdev
, 4, DRV_NAME
);
1116 /* we have legacy mode, but all ports are unavailable */
1117 if (legacy_mode
== (1 << 3)) {
1122 /* TODO: If we get no DMA mask we should fall back to PIO */
1123 rc
= pci_set_dma_mask(pdev
, ATA_DMA_MASK
);
1126 rc
= pci_set_consistent_dma_mask(pdev
, ATA_DMA_MASK
);
1131 probe_ent
= ata_pci_init_legacy_port(pdev
, port
, legacy_mode
);
1134 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
| ATA_PORT_SECONDARY
);
1136 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
);
1143 pci_set_master(pdev
);
1145 if (!ata_device_add(probe_ent
)) {
1150 devm_kfree(dev
, probe_ent
);
1151 devres_remove_group(dev
, NULL
);
1155 devres_release_group(dev
, NULL
);
1160 * ata_pci_clear_simplex - attempt to kick device out of simplex
1163 * Some PCI ATA devices report simplex mode but in fact can be told to
1164 * enter non simplex mode. This implements the neccessary logic to
1165 * perform the task on such devices. Calling it on other devices will
1166 * have -undefined- behaviour.
1169 int ata_pci_clear_simplex(struct pci_dev
*pdev
)
1171 unsigned long bmdma
= pci_resource_start(pdev
, 4);
1177 simplex
= inb(bmdma
+ 0x02);
1178 outb(simplex
& 0x60, bmdma
+ 0x02);
1179 simplex
= inb(bmdma
+ 0x02);
1185 unsigned long ata_pci_default_filter(const struct ata_port
*ap
, struct ata_device
*adev
, unsigned long xfer_mask
)
1187 /* Filter out DMA modes if the device has been configured by
1188 the BIOS as PIO only */
1190 if (ap
->ioaddr
.bmdma_addr
== 0)
1191 xfer_mask
&= ~(ATA_MASK_MWDMA
| ATA_MASK_UDMA
);
1195 #endif /* CONFIG_PCI */