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libata: add another IRQ calls (libata drivers)
[linux-2.6/kvm.git] / drivers / ata / sata_inic162x.c
blob170a10ad478ffa923d27c143d049099dff4ef361
1 /*
2 * sata_inic162x.c - Driver for Initio 162x SATA controllers
3 *
4 * Copyright 2006 SUSE Linux Products GmbH
5 * Copyright 2006 Tejun Heo <teheo@novell.com>
6 *
7 * This file is released under GPL v2.
8 *
9 * This controller is eccentric and easily locks up if something isn't
10 * right. Documentation is available at initio's website but it only
11 * documents registers (not programming model).
12 *
13 * - ATA disks work.
14 * - Hotplug works.
15 * - ATAPI read works but burning doesn't. This thing is really
16 * peculiar about ATAPI and I couldn't figure out how ATAPI PIO and
17 * ATAPI DMA WRITE should be programmed. If you've got a clue, be
18 * my guest.
19 * - Both STR and STD work.
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/pci.h>
25 #include <scsi/scsi_host.h>
26 #include <linux/libata.h>
27 #include <linux/blkdev.h>
28 #include <scsi/scsi_device.h>
29
30 #define DRV_NAME "sata_inic162x"
31 #define DRV_VERSION "0.1"
32
33 enum {
34 MMIO_BAR = 5,
35
36 NR_PORTS = 2,
37
38 HOST_CTL = 0x7c,
39 HOST_STAT = 0x7e,
40 HOST_IRQ_STAT = 0xbc,
41 HOST_IRQ_MASK = 0xbe,
42
43 PORT_SIZE = 0x40,
44
45 /* registers for ATA TF operation */
46 PORT_TF = 0x00,
47 PORT_ALT_STAT = 0x08,
48 PORT_IRQ_STAT = 0x09,
49 PORT_IRQ_MASK = 0x0a,
50 PORT_PRD_CTL = 0x0b,
51 PORT_PRD_ADDR = 0x0c,
52 PORT_PRD_XFERLEN = 0x10,
53
54 /* IDMA register */
55 PORT_IDMA_CTL = 0x14,
56
57 PORT_SCR = 0x20,
58
59 /* HOST_CTL bits */
60 HCTL_IRQOFF = (1 << 8), /* global IRQ off */
61 HCTL_PWRDWN = (1 << 13), /* power down PHYs */
62 HCTL_SOFTRST = (1 << 13), /* global reset (no phy reset) */
63 HCTL_RPGSEL = (1 << 15), /* register page select */
64
65 HCTL_KNOWN_BITS = HCTL_IRQOFF | HCTL_PWRDWN | HCTL_SOFTRST |
66 HCTL_RPGSEL,
67
68 /* HOST_IRQ_(STAT|MASK) bits */
69 HIRQ_PORT0 = (1 << 0),
70 HIRQ_PORT1 = (1 << 1),
71 HIRQ_SOFT = (1 << 14),
72 HIRQ_GLOBAL = (1 << 15), /* STAT only */
73
74 /* PORT_IRQ_(STAT|MASK) bits */
75 PIRQ_OFFLINE = (1 << 0), /* device unplugged */
76 PIRQ_ONLINE = (1 << 1), /* device plugged */
77 PIRQ_COMPLETE = (1 << 2), /* completion interrupt */
78 PIRQ_FATAL = (1 << 3), /* fatal error */
79 PIRQ_ATA = (1 << 4), /* ATA interrupt */
80 PIRQ_REPLY = (1 << 5), /* reply FIFO not empty */
81 PIRQ_PENDING = (1 << 7), /* port IRQ pending (STAT only) */
82
83 PIRQ_ERR = PIRQ_OFFLINE | PIRQ_ONLINE | PIRQ_FATAL,
84
85 PIRQ_MASK_DMA_READ = PIRQ_REPLY | PIRQ_ATA,
86 PIRQ_MASK_OTHER = PIRQ_REPLY | PIRQ_COMPLETE,
87 PIRQ_MASK_FREEZE = 0xff,
88
89 /* PORT_PRD_CTL bits */
90 PRD_CTL_START = (1 << 0),
91 PRD_CTL_WR = (1 << 3),
92 PRD_CTL_DMAEN = (1 << 7), /* DMA enable */
93
94 /* PORT_IDMA_CTL bits */
95 IDMA_CTL_RST_ATA = (1 << 2), /* hardreset ATA bus */
96 IDMA_CTL_RST_IDMA = (1 << 5), /* reset IDMA machinary */
97 IDMA_CTL_GO = (1 << 7), /* IDMA mode go */
98 IDMA_CTL_ATA_NIEN = (1 << 8), /* ATA IRQ disable */
99 };
100
101 struct inic_host_priv {
102 u16 cached_hctl;
103 };
104
105 struct inic_port_priv {
106 u8 dfl_prdctl;
107 u8 cached_prdctl;
108 u8 cached_pirq_mask;
109 };
110
111 static int inic_slave_config(struct scsi_device *sdev)
112 {
113 /* This controller is braindamaged. dma_boundary is 0xffff
114 * like others but it will lock up the whole machine HARD if
115 * 65536 byte PRD entry is fed. Reduce maximum segment size.
116 */
117 blk_queue_max_segment_size(sdev->request_queue, 65536 - 512);
118
119 return ata_scsi_slave_config(sdev);
120 }
121
122 static struct scsi_host_template inic_sht = {
123 .module = THIS_MODULE,
124 .name = DRV_NAME,
125 .ioctl = ata_scsi_ioctl,
126 .queuecommand = ata_scsi_queuecmd,
127 .can_queue = ATA_DEF_QUEUE,
128 .this_id = ATA_SHT_THIS_ID,
129 .sg_tablesize = LIBATA_MAX_PRD,
130 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
131 .emulated = ATA_SHT_EMULATED,
132 .use_clustering = ATA_SHT_USE_CLUSTERING,
133 .proc_name = DRV_NAME,
134 .dma_boundary = ATA_DMA_BOUNDARY,
135 .slave_configure = inic_slave_config,
136 .slave_destroy = ata_scsi_slave_destroy,
137 .bios_param = ata_std_bios_param,
138 .suspend = ata_scsi_device_suspend,
139 .resume = ata_scsi_device_resume,
140 };
141
142 static const int scr_map[] = {
143 [SCR_STATUS] = 0,
144 [SCR_ERROR] = 1,
145 [SCR_CONTROL] = 2,
146 };
147
148 static void __iomem * inic_port_base(struct ata_port *ap)
149 {
150 return ap->host->iomap[MMIO_BAR] + ap->port_no * PORT_SIZE;
151 }
152
153 static void __inic_set_pirq_mask(struct ata_port *ap, u8 mask)
154 {
155 void __iomem *port_base = inic_port_base(ap);
156 struct inic_port_priv *pp = ap->private_data;
157
158 writeb(mask, port_base + PORT_IRQ_MASK);
159 pp->cached_pirq_mask = mask;
160 }
161
162 static void inic_set_pirq_mask(struct ata_port *ap, u8 mask)
163 {
164 struct inic_port_priv *pp = ap->private_data;
165
166 if (pp->cached_pirq_mask != mask)
167 __inic_set_pirq_mask(ap, mask);
168 }
169
170 static void inic_reset_port(void __iomem *port_base)
171 {
172 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
173 u16 ctl;
174
175 ctl = readw(idma_ctl);
176 ctl &= ~(IDMA_CTL_RST_IDMA | IDMA_CTL_ATA_NIEN | IDMA_CTL_GO);
177
178 /* mask IRQ and assert reset */
179 writew(ctl | IDMA_CTL_RST_IDMA | IDMA_CTL_ATA_NIEN, idma_ctl);
180 readw(idma_ctl); /* flush */
181
182 /* give it some time */
183 msleep(1);
184
185 /* release reset */
186 writew(ctl | IDMA_CTL_ATA_NIEN, idma_ctl);
187
188 /* clear irq */
189 writeb(0xff, port_base + PORT_IRQ_STAT);
190
191 /* reenable ATA IRQ, turn off IDMA mode */
192 writew(ctl, idma_ctl);
193 }
194
195 static u32 inic_scr_read(struct ata_port *ap, unsigned sc_reg)
196 {
197 void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
198 void __iomem *addr;
199 u32 val;
200
201 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
202 return 0xffffffffU;
203
204 addr = scr_addr + scr_map[sc_reg] * 4;
205 val = readl(scr_addr + scr_map[sc_reg] * 4);
206
207 /* this controller has stuck DIAG.N, ignore it */
208 if (sc_reg == SCR_ERROR)
209 val &= ~SERR_PHYRDY_CHG;
210 return val;
211 }
212
213 static void inic_scr_write(struct ata_port *ap, unsigned sc_reg, u32 val)
214 {
215 void __iomem *scr_addr = (void __iomem *)ap->ioaddr.scr_addr;
216 void __iomem *addr;
217
218 if (unlikely(sc_reg >= ARRAY_SIZE(scr_map)))
219 return;
220
221 addr = scr_addr + scr_map[sc_reg] * 4;
222 writel(val, scr_addr + scr_map[sc_reg] * 4);
223 }
224
225 /*
226 * In TF mode, inic162x is very similar to SFF device. TF registers
227 * function the same. DMA engine behaves similary using the same PRD
228 * format as BMDMA but different command register, interrupt and event
229 * notification methods are used. The following inic_bmdma_*()
230 * functions do the impedance matching.
231 */
232 static void inic_bmdma_setup(struct ata_queued_cmd *qc)
233 {
234 struct ata_port *ap = qc->ap;
235 struct inic_port_priv *pp = ap->private_data;
236 void __iomem *port_base = inic_port_base(ap);
237 int rw = qc->tf.flags & ATA_TFLAG_WRITE;
238
239 /* make sure device sees PRD table writes */
240 wmb();
241
242 /* load transfer length */
243 writel(qc->nbytes, port_base + PORT_PRD_XFERLEN);
244
245 /* turn on DMA and specify data direction */
246 pp->cached_prdctl = pp->dfl_prdctl | PRD_CTL_DMAEN;
247 if (!rw)
248 pp->cached_prdctl |= PRD_CTL_WR;
249 writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
250
251 /* issue r/w command */
252 ap->ops->exec_command(ap, &qc->tf);
253 }
254
255 static void inic_bmdma_start(struct ata_queued_cmd *qc)
256 {
257 struct ata_port *ap = qc->ap;
258 struct inic_port_priv *pp = ap->private_data;
259 void __iomem *port_base = inic_port_base(ap);
260
261 /* start host DMA transaction */
262 pp->cached_prdctl |= PRD_CTL_START;
263 writeb(pp->cached_prdctl, port_base + PORT_PRD_CTL);
264 }
265
266 static void inic_bmdma_stop(struct ata_queued_cmd *qc)
267 {
268 struct ata_port *ap = qc->ap;
269 struct inic_port_priv *pp = ap->private_data;
270 void __iomem *port_base = inic_port_base(ap);
271
272 /* stop DMA engine */
273 writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
274 }
275
276 static u8 inic_bmdma_status(struct ata_port *ap)
277 {
278 /* event is already verified by the interrupt handler */
279 return ATA_DMA_INTR;
280 }
281
282 static void inic_irq_clear(struct ata_port *ap)
283 {
284 /* noop */
285 }
286
287 static void inic_host_intr(struct ata_port *ap)
288 {
289 void __iomem *port_base = inic_port_base(ap);
290 struct ata_eh_info *ehi = &ap->eh_info;
291 u8 irq_stat;
292
293 /* fetch and clear irq */
294 irq_stat = readb(port_base + PORT_IRQ_STAT);
295 writeb(irq_stat, port_base + PORT_IRQ_STAT);
296
297 if (likely(!(irq_stat & PIRQ_ERR))) {
298 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->active_tag);
299
300 if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
301 ata_chk_status(ap); /* clear ATA interrupt */
302 return;
303 }
304
305 if (likely(ata_host_intr(ap, qc)))
306 return;
307
308 ata_chk_status(ap); /* clear ATA interrupt */
309 ata_port_printk(ap, KERN_WARNING, "unhandled "
310 "interrupt, irq_stat=%x\n", irq_stat);
311 return;
312 }
313
314 /* error */
315 ata_ehi_push_desc(ehi, "irq_stat=0x%x", irq_stat);
316
317 if (irq_stat & (PIRQ_OFFLINE | PIRQ_ONLINE)) {
318 ata_ehi_hotplugged(ehi);
319 ata_port_freeze(ap);
320 } else
321 ata_port_abort(ap);
322 }
323
324 static irqreturn_t inic_interrupt(int irq, void *dev_instance)
325 {
326 struct ata_host *host = dev_instance;
327 void __iomem *mmio_base = host->iomap[MMIO_BAR];
328 u16 host_irq_stat;
329 int i, handled = 0;;
330
331 host_irq_stat = readw(mmio_base + HOST_IRQ_STAT);
332
333 if (unlikely(!(host_irq_stat & HIRQ_GLOBAL)))
334 goto out;
335
336 spin_lock(&host->lock);
337
338 for (i = 0; i < NR_PORTS; i++) {
339 struct ata_port *ap = host->ports[i];
340
341 if (!(host_irq_stat & (HIRQ_PORT0 << i)))
342 continue;
343
344 if (likely(ap && !(ap->flags & ATA_FLAG_DISABLED))) {
345 inic_host_intr(ap);
346 handled++;
347 } else {
348 if (ata_ratelimit())
349 dev_printk(KERN_ERR, host->dev, "interrupt "
350 "from disabled port %d (0x%x)\n",
351 i, host_irq_stat);
352 }
353 }
354
355 spin_unlock(&host->lock);
356
357 out:
358 return IRQ_RETVAL(handled);
359 }
360
361 static unsigned int inic_qc_issue(struct ata_queued_cmd *qc)
362 {
363 struct ata_port *ap = qc->ap;
364
365 /* ATA IRQ doesn't wait for DMA transfer completion and vice
366 * versa. Mask IRQ selectively to detect command completion.
367 * Without it, ATA DMA read command can cause data corruption.
368 *
369 * Something similar might be needed for ATAPI writes. I
370 * tried a lot of combinations but couldn't find the solution.
371 */
372 if (qc->tf.protocol == ATA_PROT_DMA &&
373 !(qc->tf.flags & ATA_TFLAG_WRITE))
374 inic_set_pirq_mask(ap, PIRQ_MASK_DMA_READ);
375 else
376 inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
377
378 /* Issuing a command to yet uninitialized port locks up the
379 * controller. Most of the time, this happens for the first
380 * command after reset which are ATA and ATAPI IDENTIFYs.
381 * Fast fail if stat is 0x7f or 0xff for those commands.
382 */
383 if (unlikely(qc->tf.command == ATA_CMD_ID_ATA ||
384 qc->tf.command == ATA_CMD_ID_ATAPI)) {
385 u8 stat = ata_chk_status(ap);
386 if (stat == 0x7f || stat == 0xff)
387 return AC_ERR_HSM;
388 }
389
390 return ata_qc_issue_prot(qc);
391 }
392
393 static void inic_freeze(struct ata_port *ap)
394 {
395 void __iomem *port_base = inic_port_base(ap);
396
397 __inic_set_pirq_mask(ap, PIRQ_MASK_FREEZE);
398
399 ata_chk_status(ap);
400 writeb(0xff, port_base + PORT_IRQ_STAT);
401
402 readb(port_base + PORT_IRQ_STAT); /* flush */
403 }
404
405 static void inic_thaw(struct ata_port *ap)
406 {
407 void __iomem *port_base = inic_port_base(ap);
408
409 ata_chk_status(ap);
410 writeb(0xff, port_base + PORT_IRQ_STAT);
411
412 __inic_set_pirq_mask(ap, PIRQ_MASK_OTHER);
413
414 readb(port_base + PORT_IRQ_STAT); /* flush */
415 }
416
417 /*
418 * SRST and SControl hardreset don't give valid signature on this
419 * controller. Only controller specific hardreset mechanism works.
420 */
421 static int inic_hardreset(struct ata_port *ap, unsigned int *class)
422 {
423 void __iomem *port_base = inic_port_base(ap);
424 void __iomem *idma_ctl = port_base + PORT_IDMA_CTL;
425 const unsigned long *timing = sata_ehc_deb_timing(&ap->eh_context);
426 u16 val;
427 int rc;
428
429 /* hammer it into sane state */
430 inic_reset_port(port_base);
431
432 if (ata_port_offline(ap)) {
433 *class = ATA_DEV_NONE;
434 return 0;
435 }
436
437 val = readw(idma_ctl);
438 writew(val | IDMA_CTL_RST_ATA, idma_ctl);
439 readw(idma_ctl); /* flush */
440 msleep(1);
441 writew(val & ~IDMA_CTL_RST_ATA, idma_ctl);
442
443 rc = sata_phy_resume(ap, timing);
444 if (rc) {
445 ata_port_printk(ap, KERN_WARNING, "failed to resume "
446 "link for reset (errno=%d)\n", rc);
447 return rc;
448 }
449
450 msleep(150);
451
452 *class = ATA_DEV_NONE;
453 if (ata_port_online(ap)) {
454 struct ata_taskfile tf;
455
456 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
457 ata_port_printk(ap, KERN_WARNING,
458 "device busy after hardreset\n");
459 return -EIO;
460 }
461
462 ata_tf_read(ap, &tf);
463 *class = ata_dev_classify(&tf);
464 if (*class == ATA_DEV_UNKNOWN)
465 *class = ATA_DEV_NONE;
466 }
467
468 return 0;
469 }
470
471 static void inic_error_handler(struct ata_port *ap)
472 {
473 void __iomem *port_base = inic_port_base(ap);
474 struct inic_port_priv *pp = ap->private_data;
475 unsigned long flags;
476
477 /* reset PIO HSM and stop DMA engine */
478 inic_reset_port(port_base);
479
480 spin_lock_irqsave(ap->lock, flags);
481 ap->hsm_task_state = HSM_ST_IDLE;
482 writeb(pp->dfl_prdctl, port_base + PORT_PRD_CTL);
483 spin_unlock_irqrestore(ap->lock, flags);
484
485 /* PIO and DMA engines have been stopped, perform recovery */
486 ata_do_eh(ap, ata_std_prereset, NULL, inic_hardreset,
487 ata_std_postreset);
488 }
489
490 static void inic_post_internal_cmd(struct ata_queued_cmd *qc)
491 {
492 /* make DMA engine forget about the failed command */
493 if (qc->err_mask)
494 inic_reset_port(inic_port_base(qc->ap));
495 }
496
497 static void inic_dev_config(struct ata_port *ap, struct ata_device *dev)
498 {
499 /* inic can only handle upto LBA28 max sectors */
500 if (dev->max_sectors > ATA_MAX_SECTORS)
501 dev->max_sectors = ATA_MAX_SECTORS;
502 }
503
504 static void init_port(struct ata_port *ap)
505 {
506 void __iomem *port_base = inic_port_base(ap);
507
508 /* Setup PRD address */
509 writel(ap->prd_dma, port_base + PORT_PRD_ADDR);
510 }
511
512 static int inic_port_resume(struct ata_port *ap)
513 {
514 init_port(ap);
515 return 0;
516 }
517
518 static int inic_port_start(struct ata_port *ap)
519 {
520 void __iomem *port_base = inic_port_base(ap);
521 struct inic_port_priv *pp;
522 u8 tmp;
523 int rc;
524
525 /* alloc and initialize private data */
526 pp = devm_kzalloc(ap->host->dev, sizeof(*pp), GFP_KERNEL);
527 if (!pp)
528 return -ENOMEM;
529 ap->private_data = pp;
530
531 /* default PRD_CTL value, DMAEN, WR and START off */
532 tmp = readb(port_base + PORT_PRD_CTL);
533 tmp &= ~(PRD_CTL_DMAEN | PRD_CTL_WR | PRD_CTL_START);
534 pp->dfl_prdctl = tmp;
535
536 /* Alloc resources */
537 rc = ata_port_start(ap);
538 if (rc) {
539 kfree(pp);
540 return rc;
541 }
542
543 init_port(ap);
544
545 return 0;
546 }
547
548 static struct ata_port_operations inic_port_ops = {
549 .port_disable = ata_port_disable,
550 .tf_load = ata_tf_load,
551 .tf_read = ata_tf_read,
552 .check_status = ata_check_status,
553 .exec_command = ata_exec_command,
554 .dev_select = ata_std_dev_select,
555
556 .scr_read = inic_scr_read,
557 .scr_write = inic_scr_write,
558
559 .bmdma_setup = inic_bmdma_setup,
560 .bmdma_start = inic_bmdma_start,
561 .bmdma_stop = inic_bmdma_stop,
562 .bmdma_status = inic_bmdma_status,
563
564 .irq_handler = inic_interrupt,
565 .irq_clear = inic_irq_clear,
566 .irq_on = ata_irq_on,
567 .irq_ack = ata_irq_ack,
568
569 .qc_prep = ata_qc_prep,
570 .qc_issue = inic_qc_issue,
571 .data_xfer = ata_data_xfer,
572
573 .freeze = inic_freeze,
574 .thaw = inic_thaw,
575 .error_handler = inic_error_handler,
576 .post_internal_cmd = inic_post_internal_cmd,
577 .dev_config = inic_dev_config,
578
579 .port_resume = inic_port_resume,
580
581 .port_start = inic_port_start,
582 };
583
584 static struct ata_port_info inic_port_info = {
585 .sht = &inic_sht,
586 /* For some reason, ATA_PROT_ATAPI is broken on this
587 * controller, and no, PIO_POLLING does't fix it. It somehow
588 * manages to report the wrong ireason and ignoring ireason
589 * results in machine lock up. Tell libata to always prefer
590 * DMA.
591 */
592 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
593 .pio_mask = 0x1f, /* pio0-4 */
594 .mwdma_mask = 0x07, /* mwdma0-2 */
595 .udma_mask = 0x7f, /* udma0-6 */
596 .port_ops = &inic_port_ops
597 };
598
599 static int init_controller(void __iomem *mmio_base, u16 hctl)
600 {
601 int i;
602 u16 val;
603
604 hctl &= ~HCTL_KNOWN_BITS;
605
606 /* Soft reset whole controller. Spec says reset duration is 3
607 * PCI clocks, be generous and give it 10ms.
608 */
609 writew(hctl | HCTL_SOFTRST, mmio_base + HOST_CTL);
610 readw(mmio_base + HOST_CTL); /* flush */
611
612 for (i = 0; i < 10; i++) {
613 msleep(1);
614 val = readw(mmio_base + HOST_CTL);
615 if (!(val & HCTL_SOFTRST))
616 break;
617 }
618
619 if (val & HCTL_SOFTRST)
620 return -EIO;
621
622 /* mask all interrupts and reset ports */
623 for (i = 0; i < NR_PORTS; i++) {
624 void __iomem *port_base = mmio_base + i * PORT_SIZE;
625
626 writeb(0xff, port_base + PORT_IRQ_MASK);
627 inic_reset_port(port_base);
628 }
629
630 /* port IRQ is masked now, unmask global IRQ */
631 writew(hctl & ~HCTL_IRQOFF, mmio_base + HOST_CTL);
632 val = readw(mmio_base + HOST_IRQ_MASK);
633 val &= ~(HIRQ_PORT0 | HIRQ_PORT1);
634 writew(val, mmio_base + HOST_IRQ_MASK);
635
636 return 0;
637 }
638
639 static int inic_pci_device_resume(struct pci_dev *pdev)
640 {
641 struct ata_host *host = dev_get_drvdata(&pdev->dev);
642 struct inic_host_priv *hpriv = host->private_data;
643 void __iomem *mmio_base = host->iomap[MMIO_BAR];
644 int rc;
645
646 ata_pci_device_do_resume(pdev);
647
648 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
649 printk("XXX\n");
650 rc = init_controller(mmio_base, hpriv->cached_hctl);
651 if (rc)
652 return rc;
653 }
654
655 ata_host_resume(host);
656
657 return 0;
658 }
659
660 static int inic_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
661 {
662 static int printed_version;
663 struct ata_port_info *pinfo = &inic_port_info;
664 struct ata_probe_ent *probe_ent;
665 struct inic_host_priv *hpriv;
666 void __iomem * const *iomap;
667 int i, rc;
668
669 if (!printed_version++)
670 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
671
672 rc = pcim_enable_device(pdev);
673 if (rc)
674 return rc;
675
676 rc = pci_request_regions(pdev, DRV_NAME);
677 if (rc)
678 return rc;
679
680 rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME);
681 if (rc)
682 return rc;
683 iomap = pcim_iomap_table(pdev);
684
685 /* Set dma_mask. This devices doesn't support 64bit addressing. */
686 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
687 if (rc) {
688 dev_printk(KERN_ERR, &pdev->dev,
689 "32-bit DMA enable failed\n");
690 return rc;
691 }
692
693 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
694 if (rc) {
695 dev_printk(KERN_ERR, &pdev->dev,
696 "32-bit consistent DMA enable failed\n");
697 return rc;
698 }
699
700 probe_ent = devm_kzalloc(&pdev->dev, sizeof(*probe_ent), GFP_KERNEL);
701 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
702 if (!probe_ent || !hpriv)
703 return -ENOMEM;
704
705 probe_ent->dev = &pdev->dev;
706 INIT_LIST_HEAD(&probe_ent->node);
707
708 probe_ent->sht = pinfo->sht;
709 probe_ent->port_flags = pinfo->flags;
710 probe_ent->pio_mask = pinfo->pio_mask;
711 probe_ent->mwdma_mask = pinfo->mwdma_mask;
712 probe_ent->udma_mask = pinfo->udma_mask;
713 probe_ent->port_ops = pinfo->port_ops;
714 probe_ent->n_ports = NR_PORTS;
715
716 probe_ent->irq = pdev->irq;
717 probe_ent->irq_flags = SA_SHIRQ;
718
719 probe_ent->iomap = iomap;
720
721 for (i = 0; i < NR_PORTS; i++) {
722 struct ata_ioports *port = &probe_ent->port[i];
723 void __iomem *port_base = iomap[MMIO_BAR] + i * PORT_SIZE;
724
725 port->cmd_addr = iomap[2 * i];
726 port->altstatus_addr =
727 port->ctl_addr = (void __iomem *)
728 ((unsigned long)iomap[2 * i + 1] | ATA_PCI_CTL_OFS);
729 port->scr_addr = port_base + PORT_SCR;
730
731 ata_std_ports(port);
732 }
733
734 probe_ent->private_data = hpriv;
735 hpriv->cached_hctl = readw(iomap[MMIO_BAR] + HOST_CTL);
736
737 rc = init_controller(iomap[MMIO_BAR], hpriv->cached_hctl);
738 if (rc) {
739 dev_printk(KERN_ERR, &pdev->dev,
740 "failed to initialize controller\n");
741 return rc;
742 }
743
744 pci_set_master(pdev);
745
746 if (!ata_device_add(probe_ent))
747 return -ENODEV;
748
749 devm_kfree(&pdev->dev, probe_ent);
750
751 return 0;
752 }
753
754 static const struct pci_device_id inic_pci_tbl[] = {
755 { PCI_VDEVICE(INIT, 0x1622), },
756 { },
757 };
758
759 static struct pci_driver inic_pci_driver = {
760 .name = DRV_NAME,
761 .id_table = inic_pci_tbl,
762 .suspend = ata_pci_device_suspend,
763 .resume = inic_pci_device_resume,
764 .probe = inic_init_one,
765 .remove = ata_pci_remove_one,
766 };
767
768 static int __init inic_init(void)
769 {
770 return pci_register_driver(&inic_pci_driver);
771 }
772
773 static void __exit inic_exit(void)
774 {
775 pci_unregister_driver(&inic_pci_driver);
776 }
777
778 MODULE_AUTHOR("Tejun Heo");
779 MODULE_DESCRIPTION("low-level driver for Initio 162x SATA");
780 MODULE_LICENSE("GPL v2");
781 MODULE_DEVICE_TABLE(pci, inic_pci_tbl);
782 MODULE_VERSION(DRV_VERSION);
783
784 module_init(inic_init);
785 module_exit(inic_exit);
kernel-based virtual machine