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ps3: Remove deprecated create_singlethread_workqueue
[linux-2.6/btrfs-unstable.git] / drivers / ata / sata_via.c
blob93b8d783936ad01a145dafa5775a44b677a8355c
1 /*
2 * sata_via.c - VIA Serial ATA controllers
3 *
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 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/driver-api/libata.rst
29 *
30 * Hardware documentation available under NDA.
31 *
32 *
33 *
34 */
35
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/device.h>
42 #include <scsi/scsi.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_host.h>
45 #include <linux/libata.h>
46
47 #define DRV_NAME "sata_via"
48 #define DRV_VERSION "2.6"
49
50 /*
51 * vt8251 is different from other sata controllers of VIA. It has two
52 * channels, each channel has both Master and Slave slot.
53 */
54 enum board_ids_enum {
55 vt6420,
56 vt6421,
57 vt8251,
58 };
59
60 enum {
61 SATA_CHAN_ENAB = 0x40, /* SATA channel enable */
62 SATA_INT_GATE = 0x41, /* SATA interrupt gating */
63 SATA_NATIVE_MODE = 0x42, /* Native mode enable */
64 SVIA_MISC_3 = 0x46, /* Miscellaneous Control III */
65 PATA_UDMA_TIMING = 0xB3, /* PATA timing for DMA/ cable detect */
66 PATA_PIO_TIMING = 0xAB, /* PATA timing register */
67
68 PORT0 = (1 << 1),
69 PORT1 = (1 << 0),
70 ALL_PORTS = PORT0 | PORT1,
71
72 NATIVE_MODE_ALL = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
73
74 SATA_EXT_PHY = (1 << 6), /* 0==use PATA, 1==ext phy */
75
76 SATA_HOTPLUG = (1 << 5), /* enable IRQ on hotplug */
77 };
78
79 struct svia_priv {
80 bool wd_workaround;
81 };
82
83 static int vt6420_hotplug;
84 module_param_named(vt6420_hotplug, vt6420_hotplug, int, 0644);
85 MODULE_PARM_DESC(vt6420_hotplug, "Enable hot-plug support for VT6420 (0=Don't support, 1=support)");
86
87 static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
88 #ifdef CONFIG_PM_SLEEP
89 static int svia_pci_device_resume(struct pci_dev *pdev);
90 #endif
91 static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
92 static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
93 static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val);
94 static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val);
95 static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
96 static void svia_noop_freeze(struct ata_port *ap);
97 static int vt6420_prereset(struct ata_link *link, unsigned long deadline);
98 static void vt6420_bmdma_start(struct ata_queued_cmd *qc);
99 static int vt6421_pata_cable_detect(struct ata_port *ap);
100 static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev);
101 static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev);
102 static void vt6421_error_handler(struct ata_port *ap);
103
104 static const struct pci_device_id svia_pci_tbl[] = {
105 { PCI_VDEVICE(VIA, 0x5337), vt6420 },
106 { PCI_VDEVICE(VIA, 0x0591), vt6420 }, /* 2 sata chnls (Master) */
107 { PCI_VDEVICE(VIA, 0x3149), vt6420 }, /* 2 sata chnls (Master) */
108 { PCI_VDEVICE(VIA, 0x3249), vt6421 }, /* 2 sata chnls, 1 pata chnl */
109 { PCI_VDEVICE(VIA, 0x5372), vt6420 },
110 { PCI_VDEVICE(VIA, 0x7372), vt6420 },
111 { PCI_VDEVICE(VIA, 0x5287), vt8251 }, /* 2 sata chnls (Master/Slave) */
112 { PCI_VDEVICE(VIA, 0x9000), vt8251 },
113
114 { } /* terminate list */
115 };
116
117 static struct pci_driver svia_pci_driver = {
118 .name = DRV_NAME,
119 .id_table = svia_pci_tbl,
120 .probe = svia_init_one,
121 #ifdef CONFIG_PM_SLEEP
122 .suspend = ata_pci_device_suspend,
123 .resume = svia_pci_device_resume,
124 #endif
125 .remove = ata_pci_remove_one,
126 };
127
128 static struct scsi_host_template svia_sht = {
129 ATA_BMDMA_SHT(DRV_NAME),
130 };
131
132 static struct ata_port_operations svia_base_ops = {
133 .inherits = &ata_bmdma_port_ops,
134 .sff_tf_load = svia_tf_load,
135 };
136
137 static struct ata_port_operations vt6420_sata_ops = {
138 .inherits = &svia_base_ops,
139 .freeze = svia_noop_freeze,
140 .prereset = vt6420_prereset,
141 .bmdma_start = vt6420_bmdma_start,
142 };
143
144 static struct ata_port_operations vt6421_pata_ops = {
145 .inherits = &svia_base_ops,
146 .cable_detect = vt6421_pata_cable_detect,
147 .set_piomode = vt6421_set_pio_mode,
148 .set_dmamode = vt6421_set_dma_mode,
149 };
150
151 static struct ata_port_operations vt6421_sata_ops = {
152 .inherits = &svia_base_ops,
153 .scr_read = svia_scr_read,
154 .scr_write = svia_scr_write,
155 .error_handler = vt6421_error_handler,
156 };
157
158 static struct ata_port_operations vt8251_ops = {
159 .inherits = &svia_base_ops,
160 .hardreset = sata_std_hardreset,
161 .scr_read = vt8251_scr_read,
162 .scr_write = vt8251_scr_write,
163 };
164
165 static const struct ata_port_info vt6420_port_info = {
166 .flags = ATA_FLAG_SATA,
167 .pio_mask = ATA_PIO4,
168 .mwdma_mask = ATA_MWDMA2,
169 .udma_mask = ATA_UDMA6,
170 .port_ops = &vt6420_sata_ops,
171 };
172
173 static const struct ata_port_info vt6421_sport_info = {
174 .flags = ATA_FLAG_SATA,
175 .pio_mask = ATA_PIO4,
176 .mwdma_mask = ATA_MWDMA2,
177 .udma_mask = ATA_UDMA6,
178 .port_ops = &vt6421_sata_ops,
179 };
180
181 static const struct ata_port_info vt6421_pport_info = {
182 .flags = ATA_FLAG_SLAVE_POSS,
183 .pio_mask = ATA_PIO4,
184 /* No MWDMA */
185 .udma_mask = ATA_UDMA6,
186 .port_ops = &vt6421_pata_ops,
187 };
188
189 static const struct ata_port_info vt8251_port_info = {
190 .flags = ATA_FLAG_SATA | ATA_FLAG_SLAVE_POSS,
191 .pio_mask = ATA_PIO4,
192 .mwdma_mask = ATA_MWDMA2,
193 .udma_mask = ATA_UDMA6,
194 .port_ops = &vt8251_ops,
195 };
196
197 MODULE_AUTHOR("Jeff Garzik");
198 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
199 MODULE_LICENSE("GPL");
200 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
201 MODULE_VERSION(DRV_VERSION);
202
203 static int svia_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
204 {
205 if (sc_reg > SCR_CONTROL)
206 return -EINVAL;
207 *val = ioread32(link->ap->ioaddr.scr_addr + (4 * sc_reg));
208 return 0;
209 }
210
211 static int svia_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
212 {
213 if (sc_reg > SCR_CONTROL)
214 return -EINVAL;
215 iowrite32(val, link->ap->ioaddr.scr_addr + (4 * sc_reg));
216 return 0;
217 }
218
219 static int vt8251_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
220 {
221 static const u8 ipm_tbl[] = { 1, 2, 6, 0 };
222 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
223 int slot = 2 * link->ap->port_no + link->pmp;
224 u32 v = 0;
225 u8 raw;
226
227 switch (scr) {
228 case SCR_STATUS:
229 pci_read_config_byte(pdev, 0xA0 + slot, &raw);
230
231 /* read the DET field, bit0 and 1 of the config byte */
232 v |= raw & 0x03;
233
234 /* read the SPD field, bit4 of the configure byte */
235 if (raw & (1 << 4))
236 v |= 0x02 << 4;
237 else
238 v |= 0x01 << 4;
239
240 /* read the IPM field, bit2 and 3 of the config byte */
241 v |= ipm_tbl[(raw >> 2) & 0x3];
242 break;
243
244 case SCR_ERROR:
245 /* devices other than 5287 uses 0xA8 as base */
246 WARN_ON(pdev->device != 0x5287);
247 pci_read_config_dword(pdev, 0xB0 + slot * 4, &v);
248 break;
249
250 case SCR_CONTROL:
251 pci_read_config_byte(pdev, 0xA4 + slot, &raw);
252
253 /* read the DET field, bit0 and bit1 */
254 v |= ((raw & 0x02) << 1) | (raw & 0x01);
255
256 /* read the IPM field, bit2 and bit3 */
257 v |= ((raw >> 2) & 0x03) << 8;
258 break;
259
260 default:
261 return -EINVAL;
262 }
263
264 *val = v;
265 return 0;
266 }
267
268 static int vt8251_scr_write(struct ata_link *link, unsigned int scr, u32 val)
269 {
270 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
271 int slot = 2 * link->ap->port_no + link->pmp;
272 u32 v = 0;
273
274 switch (scr) {
275 case SCR_ERROR:
276 /* devices other than 5287 uses 0xA8 as base */
277 WARN_ON(pdev->device != 0x5287);
278 pci_write_config_dword(pdev, 0xB0 + slot * 4, val);
279 return 0;
280
281 case SCR_CONTROL:
282 /* set the DET field */
283 v |= ((val & 0x4) >> 1) | (val & 0x1);
284
285 /* set the IPM field */
286 v |= ((val >> 8) & 0x3) << 2;
287
288 pci_write_config_byte(pdev, 0xA4 + slot, v);
289 return 0;
290
291 default:
292 return -EINVAL;
293 }
294 }
295
296 /**
297 * svia_tf_load - send taskfile registers to host controller
298 * @ap: Port to which output is sent
299 * @tf: ATA taskfile register set
300 *
301 * Outputs ATA taskfile to standard ATA host controller.
302 *
303 * This is to fix the internal bug of via chipsets, which will
304 * reset the device register after changing the IEN bit on ctl
305 * register.
306 */
307 static void svia_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
308 {
309 struct ata_taskfile ttf;
310
311 if (tf->ctl != ap->last_ctl) {
312 ttf = *tf;
313 ttf.flags |= ATA_TFLAG_DEVICE;
314 tf = &ttf;
315 }
316 ata_sff_tf_load(ap, tf);
317 }
318
319 static void svia_noop_freeze(struct ata_port *ap)
320 {
321 /* Some VIA controllers choke if ATA_NIEN is manipulated in
322 * certain way. Leave it alone and just clear pending IRQ.
323 */
324 ap->ops->sff_check_status(ap);
325 ata_bmdma_irq_clear(ap);
326 }
327
328 /**
329 * vt6420_prereset - prereset for vt6420
330 * @link: target ATA link
331 * @deadline: deadline jiffies for the operation
332 *
333 * SCR registers on vt6420 are pieces of shit and may hang the
334 * whole machine completely if accessed with the wrong timing.
335 * To avoid such catastrophe, vt6420 doesn't provide generic SCR
336 * access operations, but uses SStatus and SControl only during
337 * boot probing in controlled way.
338 *
339 * As the old (pre EH update) probing code is proven to work, we
340 * strictly follow the access pattern.
341 *
342 * LOCKING:
343 * Kernel thread context (may sleep)
344 *
345 * RETURNS:
346 * 0 on success, -errno otherwise.
347 */
348 static int vt6420_prereset(struct ata_link *link, unsigned long deadline)
349 {
350 struct ata_port *ap = link->ap;
351 struct ata_eh_context *ehc = &ap->link.eh_context;
352 unsigned long timeout = jiffies + (HZ * 5);
353 u32 sstatus, scontrol;
354 int online;
355
356 /* don't do any SCR stuff if we're not loading */
357 if (!(ap->pflags & ATA_PFLAG_LOADING))
358 goto skip_scr;
359
360 /* Resume phy. This is the old SATA resume sequence */
361 svia_scr_write(link, SCR_CONTROL, 0x300);
362 svia_scr_read(link, SCR_CONTROL, &scontrol); /* flush */
363
364 /* wait for phy to become ready, if necessary */
365 do {
366 ata_msleep(link->ap, 200);
367 svia_scr_read(link, SCR_STATUS, &sstatus);
368 if ((sstatus & 0xf) != 1)
369 break;
370 } while (time_before(jiffies, timeout));
371
372 /* open code sata_print_link_status() */
373 svia_scr_read(link, SCR_STATUS, &sstatus);
374 svia_scr_read(link, SCR_CONTROL, &scontrol);
375
376 online = (sstatus & 0xf) == 0x3;
377
378 ata_port_info(ap,
379 "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
380 online ? "up" : "down", sstatus, scontrol);
381
382 /* SStatus is read one more time */
383 svia_scr_read(link, SCR_STATUS, &sstatus);
384
385 if (!online) {
386 /* tell EH to bail */
387 ehc->i.action &= ~ATA_EH_RESET;
388 return 0;
389 }
390
391 skip_scr:
392 /* wait for !BSY */
393 ata_sff_wait_ready(link, deadline);
394
395 return 0;
396 }
397
398 static void vt6420_bmdma_start(struct ata_queued_cmd *qc)
399 {
400 struct ata_port *ap = qc->ap;
401 if ((qc->tf.command == ATA_CMD_PACKET) &&
402 (qc->scsicmd->sc_data_direction == DMA_TO_DEVICE)) {
403 /* Prevents corruption on some ATAPI burners */
404 ata_sff_pause(ap);
405 }
406 ata_bmdma_start(qc);
407 }
408
409 static int vt6421_pata_cable_detect(struct ata_port *ap)
410 {
411 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
412 u8 tmp;
413
414 pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp);
415 if (tmp & 0x10)
416 return ATA_CBL_PATA40;
417 return ATA_CBL_PATA80;
418 }
419
420 static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
421 {
422 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
423 static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
424 pci_write_config_byte(pdev, PATA_PIO_TIMING - adev->devno,
425 pio_bits[adev->pio_mode - XFER_PIO_0]);
426 }
427
428 static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
429 {
430 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
431 static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
432 pci_write_config_byte(pdev, PATA_UDMA_TIMING - adev->devno,
433 udma_bits[adev->dma_mode - XFER_UDMA_0]);
434 }
435
436 static const unsigned int svia_bar_sizes[] = {
437 8, 4, 8, 4, 16, 256
438 };
439
440 static const unsigned int vt6421_bar_sizes[] = {
441 16, 16, 16, 16, 32, 128
442 };
443
444 static void __iomem *svia_scr_addr(void __iomem *addr, unsigned int port)
445 {
446 return addr + (port * 128);
447 }
448
449 static void __iomem *vt6421_scr_addr(void __iomem *addr, unsigned int port)
450 {
451 return addr + (port * 64);
452 }
453
454 static void vt6421_init_addrs(struct ata_port *ap)
455 {
456 void __iomem * const * iomap = ap->host->iomap;
457 void __iomem *reg_addr = iomap[ap->port_no];
458 void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8);
459 struct ata_ioports *ioaddr = &ap->ioaddr;
460
461 ioaddr->cmd_addr = reg_addr;
462 ioaddr->altstatus_addr =
463 ioaddr->ctl_addr = (void __iomem *)
464 ((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS);
465 ioaddr->bmdma_addr = bmdma_addr;
466 ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no);
467
468 ata_sff_std_ports(ioaddr);
469
470 ata_port_pbar_desc(ap, ap->port_no, -1, "port");
471 ata_port_pbar_desc(ap, 4, ap->port_no * 8, "bmdma");
472 }
473
474 static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
475 {
476 const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL };
477 struct ata_host *host;
478 int rc;
479
480 if (vt6420_hotplug) {
481 ppi[0]->port_ops->scr_read = svia_scr_read;
482 ppi[0]->port_ops->scr_write = svia_scr_write;
483 }
484
485 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
486 if (rc)
487 return rc;
488 *r_host = host;
489
490 rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
491 if (rc) {
492 dev_err(&pdev->dev, "failed to iomap PCI BAR 5\n");
493 return rc;
494 }
495
496 host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0);
497 host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1);
498
499 return 0;
500 }
501
502 static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
503 {
504 const struct ata_port_info *ppi[] =
505 { &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info };
506 struct ata_host *host;
507 int i, rc;
508
509 *r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi));
510 if (!host) {
511 dev_err(&pdev->dev, "failed to allocate host\n");
512 return -ENOMEM;
513 }
514
515 rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME);
516 if (rc) {
517 dev_err(&pdev->dev, "failed to request/iomap PCI BARs (errno=%d)\n",
518 rc);
519 return rc;
520 }
521 host->iomap = pcim_iomap_table(pdev);
522
523 for (i = 0; i < host->n_ports; i++)
524 vt6421_init_addrs(host->ports[i]);
525
526 rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);
527 if (rc)
528 return rc;
529 rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);
530 if (rc)
531 return rc;
532
533 return 0;
534 }
535
536 static int vt8251_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
537 {
538 const struct ata_port_info *ppi[] = { &vt8251_port_info, NULL };
539 struct ata_host *host;
540 int i, rc;
541
542 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
543 if (rc)
544 return rc;
545 *r_host = host;
546
547 rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
548 if (rc) {
549 dev_err(&pdev->dev, "failed to iomap PCI BAR 5\n");
550 return rc;
551 }
552
553 /* 8251 hosts four sata ports as M/S of the two channels */
554 for (i = 0; i < host->n_ports; i++)
555 ata_slave_link_init(host->ports[i]);
556
557 return 0;
558 }
559
560 static void svia_wd_fix(struct pci_dev *pdev)
561 {
562 u8 tmp8;
563
564 pci_read_config_byte(pdev, 0x52, &tmp8);
565 pci_write_config_byte(pdev, 0x52, tmp8 | BIT(2));
566 }
567
568 static irqreturn_t vt642x_interrupt(int irq, void *dev_instance)
569 {
570 struct ata_host *host = dev_instance;
571 irqreturn_t rc = ata_bmdma_interrupt(irq, dev_instance);
572
573 /* if the IRQ was not handled, it might be a hotplug IRQ */
574 if (rc != IRQ_HANDLED) {
575 u32 serror;
576 unsigned long flags;
577
578 spin_lock_irqsave(&host->lock, flags);
579 /* check for hotplug on port 0 */
580 svia_scr_read(&host->ports[0]->link, SCR_ERROR, &serror);
581 if (serror & SERR_PHYRDY_CHG) {
582 ata_ehi_hotplugged(&host->ports[0]->link.eh_info);
583 ata_port_freeze(host->ports[0]);
584 rc = IRQ_HANDLED;
585 }
586 /* check for hotplug on port 1 */
587 svia_scr_read(&host->ports[1]->link, SCR_ERROR, &serror);
588 if (serror & SERR_PHYRDY_CHG) {
589 ata_ehi_hotplugged(&host->ports[1]->link.eh_info);
590 ata_port_freeze(host->ports[1]);
591 rc = IRQ_HANDLED;
592 }
593 spin_unlock_irqrestore(&host->lock, flags);
594 }
595
596 return rc;
597 }
598
599 static void vt6421_error_handler(struct ata_port *ap)
600 {
601 struct svia_priv *hpriv = ap->host->private_data;
602 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
603 u32 serror;
604
605 /* see svia_configure() for description */
606 if (!hpriv->wd_workaround) {
607 svia_scr_read(&ap->link, SCR_ERROR, &serror);
608 if (serror == 0x1000500) {
609 ata_port_warn(ap, "Incompatible drive: enabling workaround. This slows down transfer rate to ~60 MB/s");
610 svia_wd_fix(pdev);
611 hpriv->wd_workaround = true;
612 ap->link.eh_context.i.flags |= ATA_EHI_QUIET;
613 }
614 }
615
616 ata_sff_error_handler(ap);
617 }
618
619 static void svia_configure(struct pci_dev *pdev, int board_id,
620 struct svia_priv *hpriv)
621 {
622 u8 tmp8;
623
624 pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
625 dev_info(&pdev->dev, "routed to hard irq line %d\n",
626 (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
627
628 /* make sure SATA channels are enabled */
629 pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
630 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
631 dev_dbg(&pdev->dev, "enabling SATA channels (0x%x)\n",
632 (int)tmp8);
633 tmp8 |= ALL_PORTS;
634 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
635 }
636
637 /* make sure interrupts for each channel sent to us */
638 pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
639 if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
640 dev_dbg(&pdev->dev, "enabling SATA channel interrupts (0x%x)\n",
641 (int) tmp8);
642 tmp8 |= ALL_PORTS;
643 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
644 }
645
646 /* make sure native mode is enabled */
647 pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
648 if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
649 dev_dbg(&pdev->dev,
650 "enabling SATA channel native mode (0x%x)\n",
651 (int) tmp8);
652 tmp8 |= NATIVE_MODE_ALL;
653 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
654 }
655
656 if ((board_id == vt6420 && vt6420_hotplug) || board_id == vt6421) {
657 /* enable IRQ on hotplug */
658 pci_read_config_byte(pdev, SVIA_MISC_3, &tmp8);
659 if ((tmp8 & SATA_HOTPLUG) != SATA_HOTPLUG) {
660 dev_dbg(&pdev->dev,
661 "enabling SATA hotplug (0x%x)\n",
662 (int) tmp8);
663 tmp8 |= SATA_HOTPLUG;
664 pci_write_config_byte(pdev, SVIA_MISC_3, tmp8);
665 }
666 }
667
668 /*
669 * vt6420/1 has problems talking to some drives. The following
670 * is the fix from Joseph Chan <JosephChan@via.com.tw>.
671 *
672 * When host issues HOLD, device may send up to 20DW of data
673 * before acknowledging it with HOLDA and the host should be
674 * able to buffer them in FIFO. Unfortunately, some WD drives
675 * send up to 40DW before acknowledging HOLD and, in the
676 * default configuration, this ends up overflowing vt6421's
677 * FIFO, making the controller abort the transaction with
678 * R_ERR.
679 *
680 * Rx52[2] is the internal 128DW FIFO Flow control watermark
681 * adjusting mechanism enable bit and the default value 0
682 * means host will issue HOLD to device when the left FIFO
683 * size goes below 32DW. Setting it to 1 makes the watermark
684 * 64DW.
685 *
686 * https://bugzilla.kernel.org/show_bug.cgi?id=15173
687 * http://article.gmane.org/gmane.linux.ide/46352
688 * http://thread.gmane.org/gmane.linux.kernel/1062139
689 *
690 * As the fix slows down data transfer, apply it only if the error
691 * actually appears - see vt6421_error_handler()
692 * Apply the fix always on vt6420 as we don't know if SCR_ERROR can be
693 * read safely.
694 */
695 if (board_id == vt6420) {
696 svia_wd_fix(pdev);
697 hpriv->wd_workaround = true;
698 }
699 }
700
701 static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
702 {
703 unsigned int i;
704 int rc;
705 struct ata_host *host = NULL;
706 int board_id = (int) ent->driver_data;
707 const unsigned *bar_sizes;
708 struct svia_priv *hpriv;
709
710 ata_print_version_once(&pdev->dev, DRV_VERSION);
711
712 rc = pcim_enable_device(pdev);
713 if (rc)
714 return rc;
715
716 if (board_id == vt6421)
717 bar_sizes = &vt6421_bar_sizes[0];
718 else
719 bar_sizes = &svia_bar_sizes[0];
720
721 for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
722 if ((pci_resource_start(pdev, i) == 0) ||
723 (pci_resource_len(pdev, i) < bar_sizes[i])) {
724 dev_err(&pdev->dev,
725 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
726 i,
727 (unsigned long long)pci_resource_start(pdev, i),
728 (unsigned long long)pci_resource_len(pdev, i));
729 return -ENODEV;
730 }
731
732 switch (board_id) {
733 case vt6420:
734 rc = vt6420_prepare_host(pdev, &host);
735 break;
736 case vt6421:
737 rc = vt6421_prepare_host(pdev, &host);
738 break;
739 case vt8251:
740 rc = vt8251_prepare_host(pdev, &host);
741 break;
742 default:
743 rc = -EINVAL;
744 }
745 if (rc)
746 return rc;
747
748 hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
749 if (!hpriv)
750 return -ENOMEM;
751 host->private_data = hpriv;
752
753 svia_configure(pdev, board_id, hpriv);
754
755 pci_set_master(pdev);
756 if ((board_id == vt6420 && vt6420_hotplug) || board_id == vt6421)
757 return ata_host_activate(host, pdev->irq, vt642x_interrupt,
758 IRQF_SHARED, &svia_sht);
759 else
760 return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
761 IRQF_SHARED, &svia_sht);
762 }
763
764 #ifdef CONFIG_PM_SLEEP
765 static int svia_pci_device_resume(struct pci_dev *pdev)
766 {
767 struct ata_host *host = pci_get_drvdata(pdev);
768 struct svia_priv *hpriv = host->private_data;
769 int rc;
770
771 rc = ata_pci_device_do_resume(pdev);
772 if (rc)
773 return rc;
774
775 if (hpriv->wd_workaround)
776 svia_wd_fix(pdev);
777 ata_host_resume(host);
778
779 return 0;
780 }
781 #endif
782
783 module_pci_driver(svia_pci_driver);
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