blob: 16bc3e35bdd4e196eae43be264a1e758dfcf84d9 [file] [log] [blame]
Jeff Garzik1fdffbc2006-02-09 05:15:27 -05001/*
2 * libata-bmdma.c - helper library for PCI IDE BMDMA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2006 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2006 Jeff Garzik
10 *
11 *
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)
15 * any later version.
16 *
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.
21 *
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.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
32 *
33 */
34
Jeff Garzik1fdffbc2006-02-09 05:15:27 -050035#include <linux/kernel.h>
36#include <linux/pci.h>
37#include <linux/libata.h>
38
39#include "libata.h"
40
41/**
Tejun Heo90088bb2006-10-09 11:10:26 +090042 * ata_irq_on - Enable interrupts on a port.
43 * @ap: Port on which interrupts are enabled.
44 *
45 * Enable interrupts on a legacy IDE device using MMIO or PIO,
46 * wait for idle, clear any pending interrupts.
47 *
48 * LOCKING:
49 * Inherited from caller.
50 */
51u8 ata_irq_on(struct ata_port *ap)
52{
53 struct ata_ioports *ioaddr = &ap->ioaddr;
54 u8 tmp;
55
56 ap->ctl &= ~ATA_NIEN;
57 ap->last_ctl = ap->ctl;
58
Tejun Heo0d5ff562007-02-01 15:06:36 +090059 iowrite8(ap->ctl, ioaddr->ctl_addr);
Tejun Heo90088bb2006-10-09 11:10:26 +090060 tmp = ata_wait_idle(ap);
61
62 ap->ops->irq_clear(ap);
63
64 return tmp;
65}
66
Akira Iguchi83625002007-01-26 16:27:32 +090067u8 ata_dummy_irq_on (struct ata_port *ap) { return 0; }
68
69/**
70 * ata_irq_ack - Acknowledge a device interrupt.
71 * @ap: Port on which interrupts are enabled.
72 *
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.
76 *
77 * LOCKING:
78 */
79
80u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
81{
82 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
83 u8 host_stat, post_stat, status;
84
85 status = ata_busy_wait(ap, bits, 1000);
86 if (status & bits)
87 if (ata_msg_err(ap))
88 printk(KERN_ERR "abnormal status 0x%X\n", status);
89
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);
94
95 post_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
96
97 if (ata_msg_intr(ap))
98 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
99 __FUNCTION__,
100 host_stat, post_stat, status);
101
102 return status;
103}
104
105u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq) { return 0; }
106
Tejun Heo90088bb2006-10-09 11:10:26 +0900107/**
Tejun Heo0d5ff562007-02-01 15:06:36 +0900108 * ata_tf_load - send taskfile registers to host controller
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500109 * @ap: Port to which output is sent
110 * @tf: ATA taskfile register set
111 *
112 * Outputs ATA taskfile to standard ATA host controller.
113 *
114 * LOCKING:
115 * Inherited from caller.
116 */
117
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500118void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
119{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900120 struct ata_ioports *ioaddr = &ap->ioaddr;
121 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
122
123 if (tf->ctl != ap->last_ctl) {
124 iowrite8(tf->ctl, ioaddr->ctl_addr);
125 ap->last_ctl = tf->ctl;
126 ata_wait_idle(ap);
127 }
128
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",
136 tf->hob_feature,
137 tf->hob_nsect,
138 tf->hob_lbal,
139 tf->hob_lbam,
140 tf->hob_lbah);
141 }
142
143 if (is_addr) {
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",
150 tf->feature,
151 tf->nsect,
152 tf->lbal,
153 tf->lbam,
154 tf->lbah);
155 }
156
157 if (tf->flags & ATA_TFLAG_DEVICE) {
158 iowrite8(tf->device, ioaddr->device_addr);
159 VPRINTK("device 0x%X\n", tf->device);
160 }
161
162 ata_wait_idle(ap);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500163}
164
165/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500166 * ata_exec_command - issue ATA command to host controller
167 * @ap: port to which command is being issued
168 * @tf: ATA taskfile register set
169 *
Tejun Heo0d5ff562007-02-01 15:06:36 +0900170 * Issues ATA command, with proper synchronization with interrupt
171 * handler / other threads.
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500172 *
173 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400174 * spin_lock_irqsave(host lock)
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500175 */
176void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf)
177{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900178 DPRINTK("ata%u: cmd 0x%X\n", ap->id, tf->command);
179
180 iowrite8(tf->command, ap->ioaddr.command_addr);
181 ata_pause(ap);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500182}
183
184/**
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500185 * 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
188 *
189 * Reads ATA taskfile registers for currently-selected device
190 * into @tf.
191 *
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500192 * LOCKING:
193 * Inherited from caller.
194 */
195void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
196{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900197 struct ata_ioports *ioaddr = &ap->ioaddr;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500198
Tejun Heo0d5ff562007-02-01 15:06:36 +0900199 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);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500206
Tejun Heo0d5ff562007-02-01 15:06:36 +0900207 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);
214 }
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500215}
216
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500217/**
218 * ata_check_status - Read device status reg & clear interrupt
219 * @ap: port where the device is
220 *
221 * Reads ATA taskfile status register for currently-selected device
222 * and return its value. This also clears pending interrupts
223 * from this device
224 *
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500225 * LOCKING:
226 * Inherited from caller.
227 */
228u8 ata_check_status(struct ata_port *ap)
229{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900230 return ioread8(ap->ioaddr.status_addr);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500231}
232
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500233/**
234 * ata_altstatus - Read device alternate status reg
235 * @ap: port where the device is
236 *
237 * Reads ATA taskfile alternate status register for
238 * currently-selected device and return its value.
239 *
240 * Note: may NOT be used as the check_altstatus() entry in
241 * ata_port_operations.
242 *
243 * LOCKING:
244 * Inherited from caller.
245 */
246u8 ata_altstatus(struct ata_port *ap)
247{
248 if (ap->ops->check_altstatus)
249 return ap->ops->check_altstatus(ap);
250
Tejun Heo0d5ff562007-02-01 15:06:36 +0900251 return ioread8(ap->ioaddr.altstatus_addr);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500252}
253
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500254/**
Tejun Heo0d5ff562007-02-01 15:06:36 +0900255 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500256 * @qc: Info associated with this ATA transaction.
257 *
258 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400259 * spin_lock_irqsave(host lock)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500260 */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900261void ata_bmdma_setup(struct ata_queued_cmd *qc)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500262{
263 struct ata_port *ap = qc->ap;
264 unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
265 u8 dmactl;
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500266
267 /* load PRD table addr. */
268 mb(); /* make sure PRD table writes are visible to controller */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900269 iowrite32(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500270
271 /* specify data direction, triple-check start bit is clear */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900272 dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500273 dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
274 if (!rw)
275 dmactl |= ATA_DMA_WR;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900276 iowrite8(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500277
278 /* issue r/w command */
279 ap->ops->exec_command(ap, &qc->tf);
280}
281
282/**
Tejun Heo0d5ff562007-02-01 15:06:36 +0900283 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500284 * @qc: Info associated with this ATA transaction.
285 *
286 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400287 * spin_lock_irqsave(host lock)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500288 */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900289void ata_bmdma_start (struct ata_queued_cmd *qc)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500290{
291 struct ata_port *ap = qc->ap;
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500292 u8 dmactl;
293
294 /* start host DMA transaction */
Tejun Heo0d5ff562007-02-01 15:06:36 +0900295 dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
296 iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500297
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.
308 */
309}
310
311/**
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500312 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
313 * @ap: Port associated with this ATA transaction.
314 *
315 * Clear interrupt and error flags in DMA status register.
316 *
317 * May be used as the irq_clear() entry in ata_port_operations.
318 *
319 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400320 * spin_lock_irqsave(host lock)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500321 */
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500322void ata_bmdma_irq_clear(struct ata_port *ap)
323{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900324 void __iomem *mmio = ap->ioaddr.bmdma_addr;
325
326 if (!mmio)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500327 return;
328
Tejun Heo0d5ff562007-02-01 15:06:36 +0900329 iowrite8(ioread8(mmio + ATA_DMA_STATUS), mmio + ATA_DMA_STATUS);
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500330}
331
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500332/**
333 * ata_bmdma_status - Read PCI IDE BMDMA status
334 * @ap: Port associated with this ATA transaction.
335 *
336 * Read and return BMDMA status register.
337 *
338 * May be used as the bmdma_status() entry in ata_port_operations.
339 *
340 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400341 * spin_lock_irqsave(host lock)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500342 */
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500343u8 ata_bmdma_status(struct ata_port *ap)
344{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900345 return ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500346}
347
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500348/**
349 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
350 * @qc: Command we are ending DMA for
351 *
352 * Clears the ATA_DMA_START flag in the dma control register
353 *
354 * May be used as the bmdma_stop() entry in ata_port_operations.
355 *
356 * LOCKING:
Jeff Garzikcca39742006-08-24 03:19:22 -0400357 * spin_lock_irqsave(host lock)
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500358 */
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500359void ata_bmdma_stop(struct ata_queued_cmd *qc)
360{
361 struct ata_port *ap = qc->ap;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900362 void __iomem *mmio = ap->ioaddr.bmdma_addr;
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500363
Tejun Heo0d5ff562007-02-01 15:06:36 +0900364 /* clear start/stop bit */
365 iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
366 mmio + ATA_DMA_CMD);
Jeff Garzik2cc432e2006-03-23 00:32:03 -0500367
368 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
369 ata_altstatus(ap); /* dummy read */
370}
371
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900372/**
373 * ata_bmdma_freeze - Freeze BMDMA controller port
374 * @ap: port to freeze
375 *
376 * Freeze BMDMA controller port.
377 *
378 * LOCKING:
379 * Inherited from caller.
380 */
381void ata_bmdma_freeze(struct ata_port *ap)
382{
383 struct ata_ioports *ioaddr = &ap->ioaddr;
384
385 ap->ctl |= ATA_NIEN;
386 ap->last_ctl = ap->ctl;
387
Tejun Heo0d5ff562007-02-01 15:06:36 +0900388 iowrite8(ap->ctl, ioaddr->ctl_addr);
Tejun Heo0f0a3ad2006-11-17 12:24:22 +0900389
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.
393 */
394 ata_chk_status(ap);
395
396 ap->ops->irq_clear(ap);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900397}
398
399/**
400 * ata_bmdma_thaw - Thaw BMDMA controller port
401 * @ap: port to thaw
402 *
403 * Thaw BMDMA controller port.
404 *
405 * LOCKING:
406 * Inherited from caller.
407 */
408void ata_bmdma_thaw(struct ata_port *ap)
409{
410 /* clear & re-enable interrupts */
411 ata_chk_status(ap);
412 ap->ops->irq_clear(ap);
Akira Iguchi83625002007-01-26 16:27:32 +0900413 ap->ops->irq_on(ap);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900414}
415
416/**
417 * ata_bmdma_drive_eh - Perform EH with given methods for BMDMA controller
418 * @ap: port to handle error for
Tejun Heof5914a42006-05-31 18:27:48 +0900419 * @prereset: prereset method (can be NULL)
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900420 * @softreset: softreset method (can be NULL)
421 * @hardreset: hardreset method (can be NULL)
422 * @postreset: postreset method (can be NULL)
423 *
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
427 * after.
428 *
429 * This function is intended to be used for constructing
430 * ->error_handler callback by low level drivers.
431 *
432 * LOCKING:
433 * Kernel thread context (may sleep)
434 */
Tejun Heof5914a42006-05-31 18:27:48 +0900435void 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)
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900438{
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900439 struct ata_queued_cmd *qc;
440 unsigned long flags;
441 int thaw = 0;
442
443 qc = __ata_qc_from_tag(ap, ap->active_tag);
444 if (qc && !(qc->flags & ATA_QCFLAG_FAILED))
445 qc = NULL;
446
447 /* reset PIO HSM and stop DMA engine */
Jeff Garzikba6a1302006-06-22 23:46:10 -0400448 spin_lock_irqsave(ap->lock, flags);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900449
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900450 ap->hsm_task_state = HSM_ST_IDLE;
451
452 if (qc && (qc->tf.protocol == ATA_PROT_DMA ||
453 qc->tf.protocol == ATA_PROT_ATAPI_DMA)) {
454 u8 host_stat;
455
Robert Hancockfbbb2622006-10-27 19:08:41 -0700456 host_stat = ap->ops->bmdma_status(ap);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900457
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900458 /* 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.
462 */
Alan18d90de2007-01-24 11:42:38 +0000463 if (qc->err_mask == AC_ERR_TIMEOUT && (host_stat & ATA_DMA_ERR)) {
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900464 qc->err_mask = AC_ERR_HOST_BUS;
465 thaw = 1;
466 }
467
468 ap->ops->bmdma_stop(qc);
469 }
470
471 ata_altstatus(ap);
472 ata_chk_status(ap);
473 ap->ops->irq_clear(ap);
474
Jeff Garzikba6a1302006-06-22 23:46:10 -0400475 spin_unlock_irqrestore(ap->lock, flags);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900476
477 if (thaw)
478 ata_eh_thaw_port(ap);
479
480 /* PIO and DMA engines have been stopped, perform recovery */
Tejun Heof5914a42006-05-31 18:27:48 +0900481 ata_do_eh(ap, prereset, softreset, hardreset, postreset);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900482}
483
484/**
485 * ata_bmdma_error_handler - Stock error handler for BMDMA controller
486 * @ap: port to handle error for
487 *
488 * Stock error handler for BMDMA controller.
489 *
490 * LOCKING:
491 * Kernel thread context (may sleep)
492 */
493void ata_bmdma_error_handler(struct ata_port *ap)
494{
495 ata_reset_fn_t hardreset;
496
497 hardreset = NULL;
498 if (sata_scr_valid(ap))
499 hardreset = sata_std_hardreset;
500
Tejun Heof5914a42006-05-31 18:27:48 +0900501 ata_bmdma_drive_eh(ap, ata_std_prereset, ata_std_softreset, hardreset,
502 ata_std_postreset);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900503}
504
505/**
506 * ata_bmdma_post_internal_cmd - Stock post_internal_cmd for
507 * BMDMA controller
508 * @qc: internal command to clean up
509 *
510 * LOCKING:
511 * Kernel thread context (may sleep)
512 */
513void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc)
514{
Alan61dd08c2007-01-25 15:09:05 +0000515 if (qc->ap->ioaddr.bmdma_addr)
516 ata_bmdma_stop(qc);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900517}
518
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500519#ifdef CONFIG_PCI
Alan4112e162007-01-08 12:10:05 +0000520
521static int ata_resources_present(struct pci_dev *pdev, int port)
522{
523 int i;
524
525 /* Check the PCI resources for this channel are enabled */
526 port = port * 2;
527 for (i = 0; i < 2; i ++) {
528 if (pci_resource_start(pdev, port + i) == 0 ||
529 pci_resource_len(pdev, port + i) == 0)
530 return 0;
531 }
532 return 1;
533}
534
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500535/**
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
540 *
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().
546 *
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.
551 */
552
553struct ata_probe_ent *
554ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int ports)
555{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900556 struct ata_probe_ent *probe_ent;
557 int i, p = 0;
558 void __iomem * const *iomap;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500559
Tejun Heo0d5ff562007-02-01 15:06:36 +0900560 /* iomap BARs */
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);
565 return NULL;
566 }
567 }
568
569 pcim_iomap(pdev, 4, 0); /* may fail */
570 iomap = pcim_iomap_table(pdev);
571
572 /* alloc and init probe_ent */
573 probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500574 if (!probe_ent)
575 return NULL;
576
577 probe_ent->irq = pdev->irq;
Thomas Gleixner1d6f3592006-07-01 19:29:42 -0700578 probe_ent->irq_flags = IRQF_SHARED;
Alan4112e162007-01-08 12:10:05 +0000579
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;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500586
587 if (ports & ATA_PORT_PRIMARY) {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900588 probe_ent->port[p].cmd_addr = iomap[0];
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500589 probe_ent->port[p].altstatus_addr =
Tejun Heo0d5ff562007-02-01 15:06:36 +0900590 probe_ent->port[p].ctl_addr = (void __iomem *)
591 ((unsigned long)iomap[1] | ATA_PCI_CTL_OFS);
592 if (iomap[4]) {
Tejun Heob2a8bbe2007-01-25 19:40:05 +0900593 if ((!(port[p]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
Tejun Heo0d5ff562007-02-01 15:06:36 +0900594 (ioread8(iomap[4] + 2) & 0x80))
Jeff Garzikcca39742006-08-24 03:19:22 -0400595 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900596 probe_ent->port[p].bmdma_addr = iomap[4];
Alan Cox4e5ec5d2006-03-27 18:42:40 +0100597 }
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500598 ata_std_ports(&probe_ent->port[p]);
599 p++;
600 }
601
602 if (ports & ATA_PORT_SECONDARY) {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900603 probe_ent->port[p].cmd_addr = iomap[2];
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500604 probe_ent->port[p].altstatus_addr =
Tejun Heo0d5ff562007-02-01 15:06:36 +0900605 probe_ent->port[p].ctl_addr = (void __iomem *)
606 ((unsigned long)iomap[3] | ATA_PCI_CTL_OFS);
607 if (iomap[4]) {
Tejun Heob2a8bbe2007-01-25 19:40:05 +0900608 if ((!(port[p]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
Tejun Heo0d5ff562007-02-01 15:06:36 +0900609 (ioread8(iomap[4] + 10) & 0x80))
Jeff Garzikcca39742006-08-24 03:19:22 -0400610 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900611 probe_ent->port[p].bmdma_addr = iomap[4] + 8;
Alan Cox4e5ec5d2006-03-27 18:42:40 +0100612 }
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500613 ata_std_ports(&probe_ent->port[p]);
Tejun Heofea63e32006-09-16 03:04:15 +0900614 probe_ent->pinfo2 = port[1];
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500615 p++;
616 }
617
618 probe_ent->n_ports = p;
619 return probe_ent;
620}
621
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500622static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev,
Alan Cox2ec7df02006-08-10 16:59:10 +0900623 struct ata_port_info **port, int port_mask)
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500624{
625 struct ata_probe_ent *probe_ent;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900626 void __iomem *iomap[5] = { }, *bmdma;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500627
Tejun Heo0d5ff562007-02-01 15:06:36 +0900628 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])
632 return NULL;
633 }
634
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])
639 return NULL;
640 }
641
642 bmdma = pcim_iomap(pdev, 4, 16); /* may fail */
643
644 /* alloc and init probe_ent */
Alan Cox2ec7df02006-08-10 16:59:10 +0900645 probe_ent = ata_probe_ent_alloc(pci_dev_to_dev(pdev), port[0]);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500646 if (!probe_ent)
647 return NULL;
648
Tejun Heoc4b01f12006-08-10 16:59:14 +0900649 probe_ent->n_ports = 2;
Tejun Heo80702172006-11-17 16:22:27 +0900650 probe_ent->irq_flags = IRQF_SHARED;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500651
Alan Cox2ec7df02006-08-10 16:59:10 +0900652 if (port_mask & ATA_PORT_PRIMARY) {
David Woodhouse8cdf92a2007-01-01 19:31:15 +0000653 probe_ent->irq = ATA_PRIMARY_IRQ(pdev);
Tejun Heo0d5ff562007-02-01 15:06:36 +0900654 probe_ent->port[0].cmd_addr = iomap[0];
Tejun Heoc4b01f12006-08-10 16:59:14 +0900655 probe_ent->port[0].altstatus_addr =
Tejun Heo0d5ff562007-02-01 15:06:36 +0900656 probe_ent->port[0].ctl_addr = iomap[1];
Alan Cox2ec7df02006-08-10 16:59:10 +0900657 if (bmdma) {
658 probe_ent->port[0].bmdma_addr = bmdma;
Tejun Heob2a8bbe2007-01-25 19:40:05 +0900659 if ((!(port[0]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
Tejun Heo0d5ff562007-02-01 15:06:36 +0900660 (ioread8(bmdma + 2) & 0x80))
Jeff Garzikcca39742006-08-24 03:19:22 -0400661 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
Alan Cox2ec7df02006-08-10 16:59:10 +0900662 }
Tejun Heoc4b01f12006-08-10 16:59:14 +0900663 ata_std_ports(&probe_ent->port[0]);
664 } else
665 probe_ent->dummy_port_mask |= ATA_PORT_PRIMARY;
666
Alan Cox2ec7df02006-08-10 16:59:10 +0900667 if (port_mask & ATA_PORT_SECONDARY) {
Tejun Heoc4b01f12006-08-10 16:59:14 +0900668 if (probe_ent->irq)
David Woodhouse8cdf92a2007-01-01 19:31:15 +0000669 probe_ent->irq2 = ATA_SECONDARY_IRQ(pdev);
Tejun Heoc4b01f12006-08-10 16:59:14 +0900670 else
David Woodhouse8cdf92a2007-01-01 19:31:15 +0000671 probe_ent->irq = ATA_SECONDARY_IRQ(pdev);
Tejun Heo0d5ff562007-02-01 15:06:36 +0900672 probe_ent->port[1].cmd_addr = iomap[2];
Tejun Heoc4b01f12006-08-10 16:59:14 +0900673 probe_ent->port[1].altstatus_addr =
Tejun Heo0d5ff562007-02-01 15:06:36 +0900674 probe_ent->port[1].ctl_addr = iomap[3];
Alan Cox2ec7df02006-08-10 16:59:10 +0900675 if (bmdma) {
Tejun Heoc4b01f12006-08-10 16:59:14 +0900676 probe_ent->port[1].bmdma_addr = bmdma + 8;
Tejun Heob2a8bbe2007-01-25 19:40:05 +0900677 if ((!(port[1]->flags & ATA_FLAG_IGN_SIMPLEX)) &&
Tejun Heo0d5ff562007-02-01 15:06:36 +0900678 (ioread8(bmdma + 10) & 0x80))
Jeff Garzikcca39742006-08-24 03:19:22 -0400679 probe_ent->_host_flags |= ATA_HOST_SIMPLEX;
Alan Cox2ec7df02006-08-10 16:59:10 +0900680 }
Tejun Heoc4b01f12006-08-10 16:59:14 +0900681 ata_std_ports(&probe_ent->port[1]);
Jeff Garzikd639ca92006-09-28 03:48:18 -0400682
683 /* FIXME: could be pointing to stack area; must copy */
Tejun Heofea63e32006-09-16 03:04:15 +0900684 probe_ent->pinfo2 = port[1];
Tejun Heoc4b01f12006-08-10 16:59:14 +0900685 } else
686 probe_ent->dummy_port_mask |= ATA_PORT_SECONDARY;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500687
688 return probe_ent;
689}
690
691
692/**
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
697 *
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.
701 *
702 * This function calls pci_enable_device(), reserves its register
703 * regions, sets the dma mask, enables bus master mode, and calls
704 * ata_device_add()
705 *
Alan Cox2ec7df02006-08-10 16:59:10 +0900706 * ASSUMPTION:
707 * Nobody makes a single channel controller that appears solely as
708 * the secondary legacy port on PCI.
709 *
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500710 * LOCKING:
711 * Inherited from PCI layer (may sleep).
712 *
713 * RETURNS:
714 * Zero on success, negative on errno-based value on error.
715 */
716
717int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
718 unsigned int n_ports)
719{
Tejun Heof0d36ef2007-01-20 16:00:28 +0900720 struct device *dev = &pdev->dev;
Alan Cox2ec7df02006-08-10 16:59:10 +0900721 struct ata_probe_ent *probe_ent = NULL;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500722 struct ata_port_info *port[2];
Jeff Garzikc791c302006-09-28 03:40:11 -0400723 u8 mask;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500724 unsigned int legacy_mode = 0;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500725 int rc;
726
727 DPRINTK("ENTER\n");
728
Tejun Heof0d36ef2007-01-20 16:00:28 +0900729 if (!devres_open_group(dev, NULL, GFP_KERNEL))
730 return -ENOMEM;
731
Jeff Garzikc791c302006-09-28 03:40:11 -0400732 BUG_ON(n_ports < 1 || n_ports > 2);
733
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500734 port[0] = port_info[0];
735 if (n_ports > 1)
736 port[1] = port_info[1];
737 else
738 port[1] = port[0];
739
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500740 /* 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
743
744 Checking dev->is_enabled is insufficient as this is not set at
745 boot for the primary video which is BIOS enabled
746 */
747
Tejun Heof0d36ef2007-01-20 16:00:28 +0900748 rc = pcim_enable_device(pdev);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500749 if (rc)
Tejun Heof0d36ef2007-01-20 16:00:28 +0900750 goto err_out;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500751
Jeff Garzikc791c302006-09-28 03:40:11 -0400752 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
753 u8 tmp8;
754
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);
Alan Cox8eb166b2006-10-16 16:24:50 +0100760#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 */
764 if (legacy_mode) {
765 printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n");
Tejun Heof0d36ef2007-01-20 16:00:28 +0900766 rc = -EOPNOTSUPP;
767 goto err_out;
Alan Cox8eb166b2006-10-16 16:24:50 +0100768 }
769#endif
Jeff Garzikc791c302006-09-28 03:40:11 -0400770 }
771
Alandc3c3372007-01-02 11:58:34 +0000772 if (!legacy_mode) {
773 rc = pci_request_regions(pdev, DRV_NAME);
774 if (rc) {
Tejun Heof0d36ef2007-01-20 16:00:28 +0900775 pcim_pin_device(pdev);
Alandc3c3372007-01-02 11:58:34 +0000776 goto err_out;
777 }
778 } else {
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 */
Tejun Heof0d36ef2007-01-20 16:00:28 +0900781 if (!devm_request_region(dev, ATA_PRIMARY_CMD, 8, "libata")) {
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500782 struct resource *conflict, res;
Alan Cox2ec7df02006-08-10 16:59:10 +0900783 res.start = ATA_PRIMARY_CMD;
784 res.end = ATA_PRIMARY_CMD + 8 - 1;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500785 conflict = ____request_resource(&ioport_resource, &res);
Arnaud Patardcb607362006-09-19 00:23:52 -0400786 while (conflict->child)
787 conflict = ____request_resource(conflict, &res);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500788 if (!strcmp(conflict->name, "libata"))
Alan Cox2ec7df02006-08-10 16:59:10 +0900789 legacy_mode |= ATA_PORT_PRIMARY;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500790 else {
Tejun Heof0d36ef2007-01-20 16:00:28 +0900791 pcim_pin_device(pdev);
Jeff Garzika64f97f2006-09-19 00:25:50 -0400792 printk(KERN_WARNING "ata: 0x%0X IDE port busy\n" \
793 "ata: conflict with %s\n",
794 ATA_PRIMARY_CMD,
795 conflict->name);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500796 }
797 } else
Alan Cox2ec7df02006-08-10 16:59:10 +0900798 legacy_mode |= ATA_PORT_PRIMARY;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500799
Tejun Heof0d36ef2007-01-20 16:00:28 +0900800 if (!devm_request_region(dev, ATA_SECONDARY_CMD, 8, "libata")) {
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500801 struct resource *conflict, res;
Alan Cox2ec7df02006-08-10 16:59:10 +0900802 res.start = ATA_SECONDARY_CMD;
803 res.end = ATA_SECONDARY_CMD + 8 - 1;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500804 conflict = ____request_resource(&ioport_resource, &res);
Arnaud Patardcb607362006-09-19 00:23:52 -0400805 while (conflict->child)
806 conflict = ____request_resource(conflict, &res);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500807 if (!strcmp(conflict->name, "libata"))
Alan Cox2ec7df02006-08-10 16:59:10 +0900808 legacy_mode |= ATA_PORT_SECONDARY;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500809 else {
Tejun Heof0d36ef2007-01-20 16:00:28 +0900810 pcim_pin_device(pdev);
Jeff Garzika64f97f2006-09-19 00:25:50 -0400811 printk(KERN_WARNING "ata: 0x%X IDE port busy\n" \
812 "ata: conflict with %s\n",
813 ATA_SECONDARY_CMD,
814 conflict->name);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500815 }
816 } else
Alan Cox2ec7df02006-08-10 16:59:10 +0900817 legacy_mode |= ATA_PORT_SECONDARY;
Alandc3c3372007-01-02 11:58:34 +0000818
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);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500825 }
826
827 /* we have legacy mode, but all ports are unavailable */
828 if (legacy_mode == (1 << 3)) {
829 rc = -EBUSY;
Tejun Heof0d36ef2007-01-20 16:00:28 +0900830 goto err_out;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500831 }
832
Jeff Garzikc791c302006-09-28 03:40:11 -0400833 /* TODO: If we get no DMA mask we should fall back to PIO */
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500834 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
835 if (rc)
Tejun Heof0d36ef2007-01-20 16:00:28 +0900836 goto err_out;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500837 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
838 if (rc)
Tejun Heof0d36ef2007-01-20 16:00:28 +0900839 goto err_out;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500840
841 if (legacy_mode) {
Alan Cox2ec7df02006-08-10 16:59:10 +0900842 probe_ent = ata_pci_init_legacy_port(pdev, port, legacy_mode);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500843 } else {
844 if (n_ports == 2)
845 probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
846 else
847 probe_ent = ata_pci_init_native_mode(pdev, port, ATA_PORT_PRIMARY);
848 }
Alan Cox2ec7df02006-08-10 16:59:10 +0900849 if (!probe_ent) {
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500850 rc = -ENOMEM;
Tejun Heof0d36ef2007-01-20 16:00:28 +0900851 goto err_out;
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500852 }
853
854 pci_set_master(pdev);
855
Jeff Garzikc791c302006-09-28 03:40:11 -0400856 if (!ata_device_add(probe_ent)) {
857 rc = -ENODEV;
Tejun Heof0d36ef2007-01-20 16:00:28 +0900858 goto err_out;
Jeff Garzikc791c302006-09-28 03:40:11 -0400859 }
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500860
Tejun Heof0d36ef2007-01-20 16:00:28 +0900861 devm_kfree(dev, probe_ent);
862 devres_remove_group(dev, NULL);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500863 return 0;
864
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500865err_out:
Tejun Heof0d36ef2007-01-20 16:00:28 +0900866 devres_release_group(dev, NULL);
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500867 return rc;
868}
869
Alan Coxd33d44f2006-03-21 15:59:57 +0000870/**
871 * ata_pci_clear_simplex - attempt to kick device out of simplex
872 * @pdev: PCI device
873 *
874 * Some PCI ATA devices report simplex mode but in fact can be told to
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500875 * enter non simplex mode. This implements the neccessary logic to
Alan Coxd33d44f2006-03-21 15:59:57 +0000876 * perform the task on such devices. Calling it on other devices will
877 * have -undefined- behaviour.
878 */
879
880int ata_pci_clear_simplex(struct pci_dev *pdev)
881{
882 unsigned long bmdma = pci_resource_start(pdev, 4);
883 u8 simplex;
884
885 if (bmdma == 0)
886 return -ENOENT;
887
888 simplex = inb(bmdma + 0x02);
889 outb(simplex & 0x60, bmdma + 0x02);
890 simplex = inb(bmdma + 0x02);
891 if (simplex & 0x80)
892 return -EOPNOTSUPP;
893 return 0;
894}
895
896unsigned long ata_pci_default_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long xfer_mask)
897{
898 /* Filter out DMA modes if the device has been configured by
899 the BIOS as PIO only */
Jeff Garzik2e9edbf2006-03-24 09:56:57 -0500900
Alan Coxd33d44f2006-03-21 15:59:57 +0000901 if (ap->ioaddr.bmdma_addr == 0)
902 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
903 return xfer_mask;
904}
905
Jeff Garzik1fdffbc2006-02-09 05:15:27 -0500906#endif /* CONFIG_PCI */
907