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54
55#include <linux/kernel.h>
56#include <linux/module.h>
57#include <linux/pci.h>
58#include <linux/init.h>
59#include <linux/blkdev.h>
60#include <linux/delay.h>
61#include <linux/gfp.h>
62#include <scsi/scsi_host.h>
63#include <linux/libata.h>
64#include <linux/dmi.h>
65
66#define DRV_NAME "pata_via"
67#define DRV_VERSION "0.3.4"
68
69enum {
70 VIA_BAD_PREQ = 0x01,
71 VIA_BAD_CLK66 = 0x02,
72 VIA_SET_FIFO = 0x04,
73 VIA_NO_UNMASK = 0x08,
74 VIA_BAD_ID = 0x10,
75 VIA_BAD_AST = 0x20,
76 VIA_NO_ENABLES = 0x40,
77 VIA_SATA_PATA = 0x80,
78};
79
80enum {
81 VIA_IDFLAG_SINGLE = (1 << 0),
82};
83
84
85
86
87
88static const struct via_isa_bridge {
89 const char *name;
90 u16 id;
91 u8 rev_min;
92 u8 rev_max;
93 u8 udma_mask;
94 u8 flags;
95} via_isa_bridges[] = {
96 { "vx855", PCI_DEVICE_ID_VIA_VX855, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
97 { "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
98 { "vt8261", PCI_DEVICE_ID_VIA_8261, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
99 { "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
100 { "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
101 { "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
102 { "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES },
103 { "vt6415", PCI_DEVICE_ID_VIA_6415, 0x00, 0xff, ATA_UDMA6, VIA_BAD_AST | VIA_NO_ENABLES },
104 { "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
105 { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
106 { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
107 { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
108 { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, },
109 { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, },
110 { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, },
111 { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, },
112 { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, },
113 { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
114 { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, },
115 { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
116 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
117 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
118 { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
119 { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
120 { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO },
121 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
122 { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
123 { "vtxxxx", PCI_DEVICE_ID_VIA_ANON, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
124 { NULL }
125};
126
127struct via_port {
128 u8 cached_device;
129};
130
131
132
133
134
135static const struct dmi_system_id cable_dmi_table[] = {
136 {
137 .ident = "Acer Ferrari 3400",
138 .matches = {
139 DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
140 DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
141 },
142 },
143 { }
144};
145
146static int via_cable_override(struct pci_dev *pdev)
147{
148
149 if (dmi_check_system(cable_dmi_table))
150 return 1;
151
152 if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032)
153 return 1;
154 return 0;
155}
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170static int via_cable_detect(struct ata_port *ap) {
171 const struct via_isa_bridge *config = ap->host->private_data;
172 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
173 u32 ata66;
174
175 if (via_cable_override(pdev))
176 return ATA_CBL_PATA40_SHORT;
177
178 if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0)
179 return ATA_CBL_SATA;
180
181
182 if (config->udma_mask < ATA_UDMA4)
183 return ATA_CBL_PATA40;
184
185 else if (config->udma_mask < ATA_UDMA5)
186 return ATA_CBL_PATA_UNK;
187
188 pci_read_config_dword(pdev, 0x50, &ata66);
189
190
191 if (ata66 & (0x10100000 >> (16 * ap->port_no)))
192 return ATA_CBL_PATA80;
193
194 if (ata_acpi_init_gtm(ap) &&
195 ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap)))
196 return ATA_CBL_PATA80;
197 return ATA_CBL_PATA40;
198}
199
200static int via_pre_reset(struct ata_link *link, unsigned long deadline)
201{
202 struct ata_port *ap = link->ap;
203 const struct via_isa_bridge *config = ap->host->private_data;
204
205 if (!(config->flags & VIA_NO_ENABLES)) {
206 static const struct pci_bits via_enable_bits[] = {
207 { 0x40, 1, 0x02, 0x02 },
208 { 0x40, 1, 0x01, 0x01 }
209 };
210 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
211 if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no]))
212 return -ENOENT;
213 }
214
215 return ata_sff_prereset(link, deadline);
216}
217
218
219
220
221
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223
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225
226
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228
229
230
231
232
233
234static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev,
235 int mode, int set_ast, int udma_type)
236{
237 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
238 struct ata_device *peer = ata_dev_pair(adev);
239 struct ata_timing t, p;
240 static int via_clock = 33333;
241 unsigned long T = 1000000000 / via_clock;
242 unsigned long UT = T;
243 int ut;
244 int offset = 3 - (2*ap->port_no) - adev->devno;
245
246 switch (udma_type) {
247 case ATA_UDMA4:
248 UT = T / 2; break;
249 case ATA_UDMA5:
250 UT = T / 3; break;
251 case ATA_UDMA6:
252 UT = T / 4; break;
253 }
254
255
256 ata_timing_compute(adev, mode, &t, T, UT);
257
258
259 if (peer) {
260 if (peer->pio_mode) {
261 ata_timing_compute(peer, peer->pio_mode, &p, T, UT);
262 ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);
263 }
264 }
265
266
267 if (set_ast) {
268 u8 setup;
269 int shift = 2 * offset;
270
271 pci_read_config_byte(pdev, 0x4C, &setup);
272 setup &= ~(3 << shift);
273 setup |= (clamp_val(t.setup, 1, 4) - 1) << shift;
274 pci_write_config_byte(pdev, 0x4C, setup);
275 }
276
277
278 pci_write_config_byte(pdev, 0x4F - ap->port_no,
279 ((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1));
280 pci_write_config_byte(pdev, 0x48 + offset,
281 ((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1));
282
283
284 switch (udma_type) {
285 case ATA_UDMA2:
286 default:
287 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03;
288 break;
289 case ATA_UDMA4:
290 ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f;
291 break;
292 case ATA_UDMA5:
293 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
294 break;
295 case ATA_UDMA6:
296 ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;
297 break;
298 }
299
300
301 if (udma_type) {
302 u8 udma_etc;
303
304 pci_read_config_byte(pdev, 0x50 + offset, &udma_etc);
305
306
307 udma_etc &= ~0x20;
308
309 if (t.udma) {
310
311 udma_etc &= 0x10;
312 udma_etc |= ut;
313 }
314
315 pci_write_config_byte(pdev, 0x50 + offset, udma_etc);
316 }
317}
318
319static void via_set_piomode(struct ata_port *ap, struct ata_device *adev)
320{
321 const struct via_isa_bridge *config = ap->host->private_data;
322 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
323
324 via_do_set_mode(ap, adev, adev->pio_mode, set_ast, config->udma_mask);
325}
326
327static void via_set_dmamode(struct ata_port *ap, struct ata_device *adev)
328{
329 const struct via_isa_bridge *config = ap->host->private_data;
330 int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;
331
332 via_do_set_mode(ap, adev, adev->dma_mode, set_ast, config->udma_mask);
333}
334
335
336
337
338
339
340
341
342
343
344static unsigned long via_mode_filter(struct ata_device *dev, unsigned long mask)
345{
346 struct ata_host *host = dev->link->ap->host;
347 const struct via_isa_bridge *config = host->private_data;
348 unsigned char model_num[ATA_ID_PROD_LEN + 1];
349
350 if (config->id == PCI_DEVICE_ID_VIA_82C586_0) {
351 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
352 if (strcmp(model_num, "TS64GSSD25-M") == 0) {
353 ata_dev_printk(dev, KERN_WARNING,
354 "disabling UDMA mode due to reported lockups with this device.\n");
355 mask &= ~ ATA_MASK_UDMA;
356 }
357 }
358 return mask;
359}
360
361
362
363
364
365
366
367
368
369
370
371
372static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf)
373{
374 struct ata_ioports *ioaddr = &ap->ioaddr;
375 struct via_port *vp = ap->private_data;
376 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
377 int newctl = 0;
378
379 if (tf->ctl != ap->last_ctl) {
380 iowrite8(tf->ctl, ioaddr->ctl_addr);
381 ap->last_ctl = tf->ctl;
382 ata_wait_idle(ap);
383 newctl = 1;
384 }
385
386 if (tf->flags & ATA_TFLAG_DEVICE) {
387 iowrite8(tf->device, ioaddr->device_addr);
388 vp->cached_device = tf->device;
389 } else if (newctl)
390 iowrite8(vp->cached_device, ioaddr->device_addr);
391
392 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
393 WARN_ON_ONCE(!ioaddr->ctl_addr);
394 iowrite8(tf->hob_feature, ioaddr->feature_addr);
395 iowrite8(tf->hob_nsect, ioaddr->nsect_addr);
396 iowrite8(tf->hob_lbal, ioaddr->lbal_addr);
397 iowrite8(tf->hob_lbam, ioaddr->lbam_addr);
398 iowrite8(tf->hob_lbah, ioaddr->lbah_addr);
399 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
400 tf->hob_feature,
401 tf->hob_nsect,
402 tf->hob_lbal,
403 tf->hob_lbam,
404 tf->hob_lbah);
405 }
406
407 if (is_addr) {
408 iowrite8(tf->feature, ioaddr->feature_addr);
409 iowrite8(tf->nsect, ioaddr->nsect_addr);
410 iowrite8(tf->lbal, ioaddr->lbal_addr);
411 iowrite8(tf->lbam, ioaddr->lbam_addr);
412 iowrite8(tf->lbah, ioaddr->lbah_addr);
413 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
414 tf->feature,
415 tf->nsect,
416 tf->lbal,
417 tf->lbam,
418 tf->lbah);
419 }
420
421 ata_wait_idle(ap);
422}
423
424static int via_port_start(struct ata_port *ap)
425{
426 struct via_port *vp;
427 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
428
429 int ret = ata_bmdma_port_start(ap);
430 if (ret < 0)
431 return ret;
432
433 vp = devm_kzalloc(&pdev->dev, sizeof(struct via_port), GFP_KERNEL);
434 if (vp == NULL)
435 return -ENOMEM;
436 ap->private_data = vp;
437 return 0;
438}
439
440static struct scsi_host_template via_sht = {
441 ATA_BMDMA_SHT(DRV_NAME),
442};
443
444static struct ata_port_operations via_port_ops = {
445 .inherits = &ata_bmdma_port_ops,
446 .cable_detect = via_cable_detect,
447 .set_piomode = via_set_piomode,
448 .set_dmamode = via_set_dmamode,
449 .prereset = via_pre_reset,
450 .sff_tf_load = via_tf_load,
451 .port_start = via_port_start,
452 .mode_filter = via_mode_filter,
453};
454
455static struct ata_port_operations via_port_ops_noirq = {
456 .inherits = &via_port_ops,
457 .sff_data_xfer = ata_sff_data_xfer_noirq,
458};
459
460
461
462
463
464
465
466
467
468
469static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
470{
471 u8 enable;
472
473
474 pci_read_config_byte(pdev, 0x40 , &enable);
475 enable &= 3;
476
477 if (flags & VIA_SET_FIFO) {
478 static const u8 fifo_setting[4] = {0x00, 0x60, 0x00, 0x20};
479 u8 fifo;
480
481 pci_read_config_byte(pdev, 0x43, &fifo);
482
483
484 if (flags & VIA_BAD_PREQ)
485 fifo &= 0x7F;
486 else
487 fifo &= 0x9f;
488
489 fifo |= fifo_setting[enable];
490 pci_write_config_byte(pdev, 0x43, fifo);
491 }
492}
493
494
495
496
497
498
499
500
501
502
503static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
504{
505
506 static const struct ata_port_info via_mwdma_info = {
507 .flags = ATA_FLAG_SLAVE_POSS,
508 .pio_mask = ATA_PIO4,
509 .mwdma_mask = ATA_MWDMA2,
510 .port_ops = &via_port_ops
511 };
512
513 static const struct ata_port_info via_mwdma_info_borked = {
514 .flags = ATA_FLAG_SLAVE_POSS,
515 .pio_mask = ATA_PIO4,
516 .mwdma_mask = ATA_MWDMA2,
517 .port_ops = &via_port_ops_noirq,
518 };
519
520 static const struct ata_port_info via_udma33_info = {
521 .flags = ATA_FLAG_SLAVE_POSS,
522 .pio_mask = ATA_PIO4,
523 .mwdma_mask = ATA_MWDMA2,
524 .udma_mask = ATA_UDMA2,
525 .port_ops = &via_port_ops
526 };
527
528 static const struct ata_port_info via_udma66_info = {
529 .flags = ATA_FLAG_SLAVE_POSS,
530 .pio_mask = ATA_PIO4,
531 .mwdma_mask = ATA_MWDMA2,
532 .udma_mask = ATA_UDMA4,
533 .port_ops = &via_port_ops
534 };
535
536 static const struct ata_port_info via_udma100_info = {
537 .flags = ATA_FLAG_SLAVE_POSS,
538 .pio_mask = ATA_PIO4,
539 .mwdma_mask = ATA_MWDMA2,
540 .udma_mask = ATA_UDMA5,
541 .port_ops = &via_port_ops
542 };
543
544 static const struct ata_port_info via_udma133_info = {
545 .flags = ATA_FLAG_SLAVE_POSS,
546 .pio_mask = ATA_PIO4,
547 .mwdma_mask = ATA_MWDMA2,
548 .udma_mask = ATA_UDMA6,
549 .port_ops = &via_port_ops
550 };
551 const struct ata_port_info *ppi[] = { NULL, NULL };
552 struct pci_dev *isa;
553 const struct via_isa_bridge *config;
554 static int printed_version;
555 u8 enable;
556 u32 timing;
557 unsigned long flags = id->driver_data;
558 int rc;
559
560 if (!printed_version++)
561 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
562
563 rc = pcim_enable_device(pdev);
564 if (rc)
565 return rc;
566
567 if (flags & VIA_IDFLAG_SINGLE)
568 ppi[1] = &ata_dummy_port_info;
569
570
571
572 for (config = via_isa_bridges; config->id != PCI_DEVICE_ID_VIA_ANON;
573 config++)
574 if ((isa = pci_get_device(PCI_VENDOR_ID_VIA +
575 !!(config->flags & VIA_BAD_ID),
576 config->id, NULL))) {
577 u8 rev = isa->revision;
578 pci_dev_put(isa);
579
580 if ((id->device == 0x0415 || id->device == 0x3164) &&
581 (config->id != id->device))
582 continue;
583
584 if (rev >= config->rev_min && rev <= config->rev_max)
585 break;
586 }
587
588 if (!(config->flags & VIA_NO_ENABLES)) {
589
590 pci_read_config_byte(pdev, 0x40 , &enable);
591 enable &= 3;
592 if (enable == 0)
593 return -ENODEV;
594 }
595
596
597 via_config_fifo(pdev, config->flags);
598
599
600 switch (config->udma_mask) {
601 case 0x00:
602 if (config->flags & VIA_NO_UNMASK)
603 ppi[0] = &via_mwdma_info_borked;
604 else
605 ppi[0] = &via_mwdma_info;
606 break;
607 case ATA_UDMA2:
608 ppi[0] = &via_udma33_info;
609 break;
610 case ATA_UDMA4:
611 ppi[0] = &via_udma66_info;
612 break;
613 case ATA_UDMA5:
614 ppi[0] = &via_udma100_info;
615 break;
616 case ATA_UDMA6:
617 ppi[0] = &via_udma133_info;
618 break;
619 default:
620 WARN_ON(1);
621 return -ENODEV;
622 }
623
624 if (config->flags & VIA_BAD_CLK66) {
625
626 pci_read_config_dword(pdev, 0x50, &timing);
627 timing &= ~0x80008;
628 pci_write_config_dword(pdev, 0x50, timing);
629 }
630
631
632 return ata_pci_bmdma_init_one(pdev, ppi, &via_sht, (void *)config, 0);
633}
634
635#ifdef CONFIG_PM
636
637
638
639
640
641
642
643
644
645
646static int via_reinit_one(struct pci_dev *pdev)
647{
648 u32 timing;
649 struct ata_host *host = dev_get_drvdata(&pdev->dev);
650 const struct via_isa_bridge *config = host->private_data;
651 int rc;
652
653 rc = ata_pci_device_do_resume(pdev);
654 if (rc)
655 return rc;
656
657 via_config_fifo(pdev, config->flags);
658
659 if (config->udma_mask == ATA_UDMA4) {
660
661 pci_read_config_dword(pdev, 0x50, &timing);
662 timing |= 0x80008;
663 pci_write_config_dword(pdev, 0x50, timing);
664 }
665 if (config->flags & VIA_BAD_CLK66) {
666
667 pci_read_config_dword(pdev, 0x50, &timing);
668 timing &= ~0x80008;
669 pci_write_config_dword(pdev, 0x50, timing);
670 }
671
672 ata_host_resume(host);
673 return 0;
674}
675#endif
676
677static const struct pci_device_id via[] = {
678 { PCI_VDEVICE(VIA, 0x0415), },
679 { PCI_VDEVICE(VIA, 0x0571), },
680 { PCI_VDEVICE(VIA, 0x0581), },
681 { PCI_VDEVICE(VIA, 0x1571), },
682 { PCI_VDEVICE(VIA, 0x3164), },
683 { PCI_VDEVICE(VIA, 0x5324), },
684 { PCI_VDEVICE(VIA, 0xC409), VIA_IDFLAG_SINGLE },
685 { PCI_VDEVICE(VIA, 0x9001), VIA_IDFLAG_SINGLE },
686
687 { },
688};
689
690static struct pci_driver via_pci_driver = {
691 .name = DRV_NAME,
692 .id_table = via,
693 .probe = via_init_one,
694 .remove = ata_pci_remove_one,
695#ifdef CONFIG_PM
696 .suspend = ata_pci_device_suspend,
697 .resume = via_reinit_one,
698#endif
699};
700
701static int __init via_init(void)
702{
703 return pci_register_driver(&via_pci_driver);
704}
705
706static void __exit via_exit(void)
707{
708 pci_unregister_driver(&via_pci_driver);
709}
710
711MODULE_AUTHOR("Alan Cox");
712MODULE_DESCRIPTION("low-level driver for VIA PATA");
713MODULE_LICENSE("GPL");
714MODULE_DEVICE_TABLE(pci, via);
715MODULE_VERSION(DRV_VERSION);
716
717module_init(via_init);
718module_exit(via_exit);
719