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Merge tag 'devicetree-fixes-for-4.4-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
[people/ms/linux.git] / drivers / ata / pata_hpt37x.c
1 /*
2 * Libata driver for the highpoint 37x and 30x UDMA66 ATA controllers.
3 *
4 * This driver is heavily based upon:
5 *
6 * linux/drivers/ide/pci/hpt366.c Version 0.36 April 25, 2003
7 *
8 * Copyright (C) 1999-2003 Andre Hedrick <andre@linux-ide.org>
9 * Portions Copyright (C) 2001 Sun Microsystems, Inc.
10 * Portions Copyright (C) 2003 Red Hat Inc
11 * Portions Copyright (C) 2005-2010 MontaVista Software, Inc.
12 *
13 * TODO
14 * Look into engine reset on timeout errors. Should not be required.
15 */
16
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/pci.h>
22 #include <linux/blkdev.h>
23 #include <linux/delay.h>
24 #include <scsi/scsi_host.h>
25 #include <linux/libata.h>
26
27 #define DRV_NAME "pata_hpt37x"
28 #define DRV_VERSION "0.6.23"
29
30 struct hpt_clock {
31 u8 xfer_speed;
32 u32 timing;
33 };
34
35 struct hpt_chip {
36 const char *name;
37 unsigned int base;
38 struct hpt_clock const *clocks[4];
39 };
40
41 /* key for bus clock timings
42 * bit
43 * 0:3 data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA.
44 * cycles = value + 1
45 * 4:8 data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
46 * cycles = value + 1
47 * 9:12 cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
48 * register access.
49 * 13:17 cmd_low_time. Active time of DIOW_/DIOR_ during task file
50 * register access.
51 * 18:20 udma_cycle_time. Clock cycles for UDMA xfer.
52 * 21 CLK frequency for UDMA: 0=ATA clock, 1=dual ATA clock.
53 * 22:24 pre_high_time. Time to initialize 1st cycle for PIO and MW DMA xfer.
54 * 25:27 cmd_pre_high_time. Time to initialize 1st PIO cycle for task file
55 * register access.
56 * 28 UDMA enable.
57 * 29 DMA enable.
58 * 30 PIO_MST enable. If set, the chip is in bus master mode during
59 * PIO xfer.
60 * 31 FIFO enable. Only for PIO.
61 */
62
63 static struct hpt_clock hpt37x_timings_33[] = {
64 { XFER_UDMA_6, 0x12446231 }, /* 0x12646231 ?? */
65 { XFER_UDMA_5, 0x12446231 },
66 { XFER_UDMA_4, 0x12446231 },
67 { XFER_UDMA_3, 0x126c6231 },
68 { XFER_UDMA_2, 0x12486231 },
69 { XFER_UDMA_1, 0x124c6233 },
70 { XFER_UDMA_0, 0x12506297 },
71
72 { XFER_MW_DMA_2, 0x22406c31 },
73 { XFER_MW_DMA_1, 0x22406c33 },
74 { XFER_MW_DMA_0, 0x22406c97 },
75
76 { XFER_PIO_4, 0x06414e31 },
77 { XFER_PIO_3, 0x06414e42 },
78 { XFER_PIO_2, 0x06414e53 },
79 { XFER_PIO_1, 0x06814e93 },
80 { XFER_PIO_0, 0x06814ea7 }
81 };
82
83 static struct hpt_clock hpt37x_timings_50[] = {
84 { XFER_UDMA_6, 0x12848242 },
85 { XFER_UDMA_5, 0x12848242 },
86 { XFER_UDMA_4, 0x12ac8242 },
87 { XFER_UDMA_3, 0x128c8242 },
88 { XFER_UDMA_2, 0x120c8242 },
89 { XFER_UDMA_1, 0x12148254 },
90 { XFER_UDMA_0, 0x121882ea },
91
92 { XFER_MW_DMA_2, 0x22808242 },
93 { XFER_MW_DMA_1, 0x22808254 },
94 { XFER_MW_DMA_0, 0x228082ea },
95
96 { XFER_PIO_4, 0x0a81f442 },
97 { XFER_PIO_3, 0x0a81f443 },
98 { XFER_PIO_2, 0x0a81f454 },
99 { XFER_PIO_1, 0x0ac1f465 },
100 { XFER_PIO_0, 0x0ac1f48a }
101 };
102
103 static struct hpt_clock hpt37x_timings_66[] = {
104 { XFER_UDMA_6, 0x1c869c62 },
105 { XFER_UDMA_5, 0x1cae9c62 }, /* 0x1c8a9c62 */
106 { XFER_UDMA_4, 0x1c8a9c62 },
107 { XFER_UDMA_3, 0x1c8e9c62 },
108 { XFER_UDMA_2, 0x1c929c62 },
109 { XFER_UDMA_1, 0x1c9a9c62 },
110 { XFER_UDMA_0, 0x1c829c62 },
111
112 { XFER_MW_DMA_2, 0x2c829c62 },
113 { XFER_MW_DMA_1, 0x2c829c66 },
114 { XFER_MW_DMA_0, 0x2c829d2e },
115
116 { XFER_PIO_4, 0x0c829c62 },
117 { XFER_PIO_3, 0x0c829c84 },
118 { XFER_PIO_2, 0x0c829ca6 },
119 { XFER_PIO_1, 0x0d029d26 },
120 { XFER_PIO_0, 0x0d029d5e }
121 };
122
123
124 static const struct hpt_chip hpt370 = {
125 "HPT370",
126 48,
127 {
128 hpt37x_timings_33,
129 NULL,
130 NULL,
131 NULL
132 }
133 };
134
135 static const struct hpt_chip hpt370a = {
136 "HPT370A",
137 48,
138 {
139 hpt37x_timings_33,
140 NULL,
141 hpt37x_timings_50,
142 NULL
143 }
144 };
145
146 static const struct hpt_chip hpt372 = {
147 "HPT372",
148 55,
149 {
150 hpt37x_timings_33,
151 NULL,
152 hpt37x_timings_50,
153 hpt37x_timings_66
154 }
155 };
156
157 static const struct hpt_chip hpt302 = {
158 "HPT302",
159 66,
160 {
161 hpt37x_timings_33,
162 NULL,
163 hpt37x_timings_50,
164 hpt37x_timings_66
165 }
166 };
167
168 static const struct hpt_chip hpt371 = {
169 "HPT371",
170 66,
171 {
172 hpt37x_timings_33,
173 NULL,
174 hpt37x_timings_50,
175 hpt37x_timings_66
176 }
177 };
178
179 static const struct hpt_chip hpt372a = {
180 "HPT372A",
181 66,
182 {
183 hpt37x_timings_33,
184 NULL,
185 hpt37x_timings_50,
186 hpt37x_timings_66
187 }
188 };
189
190 static const struct hpt_chip hpt374 = {
191 "HPT374",
192 48,
193 {
194 hpt37x_timings_33,
195 NULL,
196 NULL,
197 NULL
198 }
199 };
200
201 /**
202 * hpt37x_find_mode - reset the hpt37x bus
203 * @ap: ATA port
204 * @speed: transfer mode
205 *
206 * Return the 32bit register programming information for this channel
207 * that matches the speed provided.
208 */
209
210 static u32 hpt37x_find_mode(struct ata_port *ap, int speed)
211 {
212 struct hpt_clock *clocks = ap->host->private_data;
213
214 while (clocks->xfer_speed) {
215 if (clocks->xfer_speed == speed)
216 return clocks->timing;
217 clocks++;
218 }
219 BUG();
220 return 0xffffffffU; /* silence compiler warning */
221 }
222
223 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,
224 const char * const list[])
225 {
226 unsigned char model_num[ATA_ID_PROD_LEN + 1];
227 int i = 0;
228
229 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
230
231 while (list[i] != NULL) {
232 if (!strcmp(list[i], model_num)) {
233 pr_warn("%s is not supported for %s\n",
234 modestr, list[i]);
235 return 1;
236 }
237 i++;
238 }
239 return 0;
240 }
241
242 static const char * const bad_ata33[] = {
243 "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3",
244 "Maxtor 90845U3", "Maxtor 90650U2",
245 "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5",
246 "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
247 "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6",
248 "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
249 "Maxtor 90510D4",
250 "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
251 "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7",
252 "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
253 "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5",
254 "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
255 NULL
256 };
257
258 static const char * const bad_ata100_5[] = {
259 "IBM-DTLA-307075",
260 "IBM-DTLA-307060",
261 "IBM-DTLA-307045",
262 "IBM-DTLA-307030",
263 "IBM-DTLA-307020",
264 "IBM-DTLA-307015",
265 "IBM-DTLA-305040",
266 "IBM-DTLA-305030",
267 "IBM-DTLA-305020",
268 "IC35L010AVER07-0",
269 "IC35L020AVER07-0",
270 "IC35L030AVER07-0",
271 "IC35L040AVER07-0",
272 "IC35L060AVER07-0",
273 "WDC AC310200R",
274 NULL
275 };
276
277 /**
278 * hpt370_filter - mode selection filter
279 * @adev: ATA device
280 *
281 * Block UDMA on devices that cause trouble with this controller.
282 */
283
284 static unsigned long hpt370_filter(struct ata_device *adev, unsigned long mask)
285 {
286 if (adev->class == ATA_DEV_ATA) {
287 if (hpt_dma_blacklisted(adev, "UDMA", bad_ata33))
288 mask &= ~ATA_MASK_UDMA;
289 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
290 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
291 }
292 return mask;
293 }
294
295 /**
296 * hpt370a_filter - mode selection filter
297 * @adev: ATA device
298 *
299 * Block UDMA on devices that cause trouble with this controller.
300 */
301
302 static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long mask)
303 {
304 if (adev->class == ATA_DEV_ATA) {
305 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
306 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
307 }
308 return mask;
309 }
310
311 /**
312 * hpt372_filter - mode selection filter
313 * @adev: ATA device
314 * @mask: mode mask
315 *
316 * The Marvell bridge chips used on the HighPoint SATA cards do not seem
317 * to support the UltraDMA modes 1, 2, and 3 as well as any MWDMA modes...
318 */
319 static unsigned long hpt372_filter(struct ata_device *adev, unsigned long mask)
320 {
321 if (ata_id_is_sata(adev->id))
322 mask &= ~((0xE << ATA_SHIFT_UDMA) | ATA_MASK_MWDMA);
323
324 return mask;
325 }
326
327 /**
328 * hpt37x_cable_detect - Detect the cable type
329 * @ap: ATA port to detect on
330 *
331 * Return the cable type attached to this port
332 */
333
334 static int hpt37x_cable_detect(struct ata_port *ap)
335 {
336 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
337 u8 scr2, ata66;
338
339 pci_read_config_byte(pdev, 0x5B, &scr2);
340 pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
341
342 udelay(10); /* debounce */
343
344 /* Cable register now active */
345 pci_read_config_byte(pdev, 0x5A, &ata66);
346 /* Restore state */
347 pci_write_config_byte(pdev, 0x5B, scr2);
348
349 if (ata66 & (2 >> ap->port_no))
350 return ATA_CBL_PATA40;
351 else
352 return ATA_CBL_PATA80;
353 }
354
355 /**
356 * hpt374_fn1_cable_detect - Detect the cable type
357 * @ap: ATA port to detect on
358 *
359 * Return the cable type attached to this port
360 */
361
362 static int hpt374_fn1_cable_detect(struct ata_port *ap)
363 {
364 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
365 unsigned int mcrbase = 0x50 + 4 * ap->port_no;
366 u16 mcr3;
367 u8 ata66;
368
369 /* Do the extra channel work */
370 pci_read_config_word(pdev, mcrbase + 2, &mcr3);
371 /* Set bit 15 of 0x52 to enable TCBLID as input */
372 pci_write_config_word(pdev, mcrbase + 2, mcr3 | 0x8000);
373 pci_read_config_byte(pdev, 0x5A, &ata66);
374 /* Reset TCBLID/FCBLID to output */
375 pci_write_config_word(pdev, mcrbase + 2, mcr3);
376
377 if (ata66 & (2 >> ap->port_no))
378 return ATA_CBL_PATA40;
379 else
380 return ATA_CBL_PATA80;
381 }
382
383 /**
384 * hpt37x_pre_reset - reset the hpt37x bus
385 * @link: ATA link to reset
386 * @deadline: deadline jiffies for the operation
387 *
388 * Perform the initial reset handling for the HPT37x.
389 */
390
391 static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline)
392 {
393 struct ata_port *ap = link->ap;
394 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
395 static const struct pci_bits hpt37x_enable_bits[] = {
396 { 0x50, 1, 0x04, 0x04 },
397 { 0x54, 1, 0x04, 0x04 }
398 };
399
400 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
401 return -ENOENT;
402
403 /* Reset the state machine */
404 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
405 udelay(100);
406
407 return ata_sff_prereset(link, deadline);
408 }
409
410 static void hpt370_set_mode(struct ata_port *ap, struct ata_device *adev,
411 u8 mode)
412 {
413 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
414 u32 addr1, addr2;
415 u32 reg, timing, mask;
416 u8 fast;
417
418 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
419 addr2 = 0x51 + 4 * ap->port_no;
420
421 /* Fast interrupt prediction disable, hold off interrupt disable */
422 pci_read_config_byte(pdev, addr2, &fast);
423 fast &= ~0x02;
424 fast |= 0x01;
425 pci_write_config_byte(pdev, addr2, fast);
426
427 /* Determine timing mask and find matching mode entry */
428 if (mode < XFER_MW_DMA_0)
429 mask = 0xcfc3ffff;
430 else if (mode < XFER_UDMA_0)
431 mask = 0x31c001ff;
432 else
433 mask = 0x303c0000;
434
435 timing = hpt37x_find_mode(ap, mode);
436
437 pci_read_config_dword(pdev, addr1, &reg);
438 reg = (reg & ~mask) | (timing & mask);
439 pci_write_config_dword(pdev, addr1, reg);
440 }
441 /**
442 * hpt370_set_piomode - PIO setup
443 * @ap: ATA interface
444 * @adev: device on the interface
445 *
446 * Perform PIO mode setup.
447 */
448
449 static void hpt370_set_piomode(struct ata_port *ap, struct ata_device *adev)
450 {
451 hpt370_set_mode(ap, adev, adev->pio_mode);
452 }
453
454 /**
455 * hpt370_set_dmamode - DMA timing setup
456 * @ap: ATA interface
457 * @adev: Device being configured
458 *
459 * Set up the channel for MWDMA or UDMA modes.
460 */
461
462 static void hpt370_set_dmamode(struct ata_port *ap, struct ata_device *adev)
463 {
464 hpt370_set_mode(ap, adev, adev->dma_mode);
465 }
466
467 /**
468 * hpt370_bmdma_end - DMA engine stop
469 * @qc: ATA command
470 *
471 * Work around the HPT370 DMA engine.
472 */
473
474 static void hpt370_bmdma_stop(struct ata_queued_cmd *qc)
475 {
476 struct ata_port *ap = qc->ap;
477 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
478 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
479 u8 dma_stat = ioread8(bmdma + ATA_DMA_STATUS);
480 u8 dma_cmd;
481
482 if (dma_stat & ATA_DMA_ACTIVE) {
483 udelay(20);
484 dma_stat = ioread8(bmdma + ATA_DMA_STATUS);
485 }
486 if (dma_stat & ATA_DMA_ACTIVE) {
487 /* Clear the engine */
488 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
489 udelay(10);
490 /* Stop DMA */
491 dma_cmd = ioread8(bmdma + ATA_DMA_CMD);
492 iowrite8(dma_cmd & ~ATA_DMA_START, bmdma + ATA_DMA_CMD);
493 /* Clear Error */
494 dma_stat = ioread8(bmdma + ATA_DMA_STATUS);
495 iowrite8(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR,
496 bmdma + ATA_DMA_STATUS);
497 /* Clear the engine */
498 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
499 udelay(10);
500 }
501 ata_bmdma_stop(qc);
502 }
503
504 static void hpt372_set_mode(struct ata_port *ap, struct ata_device *adev,
505 u8 mode)
506 {
507 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
508 u32 addr1, addr2;
509 u32 reg, timing, mask;
510 u8 fast;
511
512 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
513 addr2 = 0x51 + 4 * ap->port_no;
514
515 /* Fast interrupt prediction disable, hold off interrupt disable */
516 pci_read_config_byte(pdev, addr2, &fast);
517 fast &= ~0x07;
518 pci_write_config_byte(pdev, addr2, fast);
519
520 /* Determine timing mask and find matching mode entry */
521 if (mode < XFER_MW_DMA_0)
522 mask = 0xcfc3ffff;
523 else if (mode < XFER_UDMA_0)
524 mask = 0x31c001ff;
525 else
526 mask = 0x303c0000;
527
528 timing = hpt37x_find_mode(ap, mode);
529
530 pci_read_config_dword(pdev, addr1, &reg);
531 reg = (reg & ~mask) | (timing & mask);
532 pci_write_config_dword(pdev, addr1, reg);
533 }
534
535 /**
536 * hpt372_set_piomode - PIO setup
537 * @ap: ATA interface
538 * @adev: device on the interface
539 *
540 * Perform PIO mode setup.
541 */
542
543 static void hpt372_set_piomode(struct ata_port *ap, struct ata_device *adev)
544 {
545 hpt372_set_mode(ap, adev, adev->pio_mode);
546 }
547
548 /**
549 * hpt372_set_dmamode - DMA timing setup
550 * @ap: ATA interface
551 * @adev: Device being configured
552 *
553 * Set up the channel for MWDMA or UDMA modes.
554 */
555
556 static void hpt372_set_dmamode(struct ata_port *ap, struct ata_device *adev)
557 {
558 hpt372_set_mode(ap, adev, adev->dma_mode);
559 }
560
561 /**
562 * hpt37x_bmdma_end - DMA engine stop
563 * @qc: ATA command
564 *
565 * Clean up after the HPT372 and later DMA engine
566 */
567
568 static void hpt37x_bmdma_stop(struct ata_queued_cmd *qc)
569 {
570 struct ata_port *ap = qc->ap;
571 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
572 int mscreg = 0x50 + 4 * ap->port_no;
573 u8 bwsr_stat, msc_stat;
574
575 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
576 pci_read_config_byte(pdev, mscreg, &msc_stat);
577 if (bwsr_stat & (1 << ap->port_no))
578 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
579 ata_bmdma_stop(qc);
580 }
581
582
583 static struct scsi_host_template hpt37x_sht = {
584 ATA_BMDMA_SHT(DRV_NAME),
585 };
586
587 /*
588 * Configuration for HPT370
589 */
590
591 static struct ata_port_operations hpt370_port_ops = {
592 .inherits = &ata_bmdma_port_ops,
593
594 .bmdma_stop = hpt370_bmdma_stop,
595
596 .mode_filter = hpt370_filter,
597 .cable_detect = hpt37x_cable_detect,
598 .set_piomode = hpt370_set_piomode,
599 .set_dmamode = hpt370_set_dmamode,
600 .prereset = hpt37x_pre_reset,
601 };
602
603 /*
604 * Configuration for HPT370A. Close to 370 but less filters
605 */
606
607 static struct ata_port_operations hpt370a_port_ops = {
608 .inherits = &hpt370_port_ops,
609 .mode_filter = hpt370a_filter,
610 };
611
612 /*
613 * Configuration for HPT371 and HPT302. Slightly different PIO and DMA
614 * mode setting functionality.
615 */
616
617 static struct ata_port_operations hpt302_port_ops = {
618 .inherits = &ata_bmdma_port_ops,
619
620 .bmdma_stop = hpt37x_bmdma_stop,
621
622 .cable_detect = hpt37x_cable_detect,
623 .set_piomode = hpt372_set_piomode,
624 .set_dmamode = hpt372_set_dmamode,
625 .prereset = hpt37x_pre_reset,
626 };
627
628 /*
629 * Configuration for HPT372. Mode setting works like 371 and 302
630 * but we have a mode filter.
631 */
632
633 static struct ata_port_operations hpt372_port_ops = {
634 .inherits = &hpt302_port_ops,
635 .mode_filter = hpt372_filter,
636 };
637
638 /*
639 * Configuration for HPT374. Mode setting and filtering works like 372
640 * but we have a different cable detection procedure for function 1.
641 */
642
643 static struct ata_port_operations hpt374_fn1_port_ops = {
644 .inherits = &hpt372_port_ops,
645 .cable_detect = hpt374_fn1_cable_detect,
646 };
647
648 /**
649 * hpt37x_clock_slot - Turn timing to PC clock entry
650 * @freq: Reported frequency timing
651 * @base: Base timing
652 *
653 * Turn the timing data intoa clock slot (0 for 33, 1 for 40, 2 for 50
654 * and 3 for 66Mhz)
655 */
656
657 static int hpt37x_clock_slot(unsigned int freq, unsigned int base)
658 {
659 unsigned int f = (base * freq) / 192; /* Mhz */
660 if (f < 40)
661 return 0; /* 33Mhz slot */
662 if (f < 45)
663 return 1; /* 40Mhz slot */
664 if (f < 55)
665 return 2; /* 50Mhz slot */
666 return 3; /* 60Mhz slot */
667 }
668
669 /**
670 * hpt37x_calibrate_dpll - Calibrate the DPLL loop
671 * @dev: PCI device
672 *
673 * Perform a calibration cycle on the HPT37x DPLL. Returns 1 if this
674 * succeeds
675 */
676
677 static int hpt37x_calibrate_dpll(struct pci_dev *dev)
678 {
679 u8 reg5b;
680 u32 reg5c;
681 int tries;
682
683 for (tries = 0; tries < 0x5000; tries++) {
684 udelay(50);
685 pci_read_config_byte(dev, 0x5b, &reg5b);
686 if (reg5b & 0x80) {
687 /* See if it stays set */
688 for (tries = 0; tries < 0x1000; tries++) {
689 pci_read_config_byte(dev, 0x5b, &reg5b);
690 /* Failed ? */
691 if ((reg5b & 0x80) == 0)
692 return 0;
693 }
694 /* Turn off tuning, we have the DPLL set */
695 pci_read_config_dword(dev, 0x5c, &reg5c);
696 pci_write_config_dword(dev, 0x5c, reg5c & ~0x100);
697 return 1;
698 }
699 }
700 /* Never went stable */
701 return 0;
702 }
703
704 static u32 hpt374_read_freq(struct pci_dev *pdev)
705 {
706 u32 freq;
707 unsigned long io_base = pci_resource_start(pdev, 4);
708
709 if (PCI_FUNC(pdev->devfn) & 1) {
710 struct pci_dev *pdev_0;
711
712 pdev_0 = pci_get_slot(pdev->bus, pdev->devfn - 1);
713 /* Someone hot plugged the controller on us ? */
714 if (pdev_0 == NULL)
715 return 0;
716 io_base = pci_resource_start(pdev_0, 4);
717 freq = inl(io_base + 0x90);
718 pci_dev_put(pdev_0);
719 } else
720 freq = inl(io_base + 0x90);
721 return freq;
722 }
723
724 /**
725 * hpt37x_init_one - Initialise an HPT37X/302
726 * @dev: PCI device
727 * @id: Entry in match table
728 *
729 * Initialise an HPT37x device. There are some interesting complications
730 * here. Firstly the chip may report 366 and be one of several variants.
731 * Secondly all the timings depend on the clock for the chip which we must
732 * detect and look up
733 *
734 * This is the known chip mappings. It may be missing a couple of later
735 * releases.
736 *
737 * Chip version PCI Rev Notes
738 * HPT366 4 (HPT366) 0 Other driver
739 * HPT366 4 (HPT366) 1 Other driver
740 * HPT368 4 (HPT366) 2 Other driver
741 * HPT370 4 (HPT366) 3 UDMA100
742 * HPT370A 4 (HPT366) 4 UDMA100
743 * HPT372 4 (HPT366) 5 UDMA133 (1)
744 * HPT372N 4 (HPT366) 6 Other driver
745 * HPT372A 5 (HPT372) 1 UDMA133 (1)
746 * HPT372N 5 (HPT372) 2 Other driver
747 * HPT302 6 (HPT302) 1 UDMA133
748 * HPT302N 6 (HPT302) 2 Other driver
749 * HPT371 7 (HPT371) * UDMA133
750 * HPT374 8 (HPT374) * UDMA133 4 channel
751 * HPT372N 9 (HPT372N) * Other driver
752 *
753 * (1) UDMA133 support depends on the bus clock
754 */
755
756 static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
757 {
758 /* HPT370 - UDMA100 */
759 static const struct ata_port_info info_hpt370 = {
760 .flags = ATA_FLAG_SLAVE_POSS,
761 .pio_mask = ATA_PIO4,
762 .mwdma_mask = ATA_MWDMA2,
763 .udma_mask = ATA_UDMA5,
764 .port_ops = &hpt370_port_ops
765 };
766 /* HPT370A - UDMA100 */
767 static const struct ata_port_info info_hpt370a = {
768 .flags = ATA_FLAG_SLAVE_POSS,
769 .pio_mask = ATA_PIO4,
770 .mwdma_mask = ATA_MWDMA2,
771 .udma_mask = ATA_UDMA5,
772 .port_ops = &hpt370a_port_ops
773 };
774 /* HPT370 - UDMA66 */
775 static const struct ata_port_info info_hpt370_33 = {
776 .flags = ATA_FLAG_SLAVE_POSS,
777 .pio_mask = ATA_PIO4,
778 .mwdma_mask = ATA_MWDMA2,
779 .udma_mask = ATA_UDMA4,
780 .port_ops = &hpt370_port_ops
781 };
782 /* HPT370A - UDMA66 */
783 static const struct ata_port_info info_hpt370a_33 = {
784 .flags = ATA_FLAG_SLAVE_POSS,
785 .pio_mask = ATA_PIO4,
786 .mwdma_mask = ATA_MWDMA2,
787 .udma_mask = ATA_UDMA4,
788 .port_ops = &hpt370a_port_ops
789 };
790 /* HPT372 - UDMA133 */
791 static const struct ata_port_info info_hpt372 = {
792 .flags = ATA_FLAG_SLAVE_POSS,
793 .pio_mask = ATA_PIO4,
794 .mwdma_mask = ATA_MWDMA2,
795 .udma_mask = ATA_UDMA6,
796 .port_ops = &hpt372_port_ops
797 };
798 /* HPT371, 302 - UDMA133 */
799 static const struct ata_port_info info_hpt302 = {
800 .flags = ATA_FLAG_SLAVE_POSS,
801 .pio_mask = ATA_PIO4,
802 .mwdma_mask = ATA_MWDMA2,
803 .udma_mask = ATA_UDMA6,
804 .port_ops = &hpt302_port_ops
805 };
806 /* HPT374 - UDMA100, function 1 uses different cable_detect method */
807 static const struct ata_port_info info_hpt374_fn0 = {
808 .flags = ATA_FLAG_SLAVE_POSS,
809 .pio_mask = ATA_PIO4,
810 .mwdma_mask = ATA_MWDMA2,
811 .udma_mask = ATA_UDMA5,
812 .port_ops = &hpt372_port_ops
813 };
814 static const struct ata_port_info info_hpt374_fn1 = {
815 .flags = ATA_FLAG_SLAVE_POSS,
816 .pio_mask = ATA_PIO4,
817 .mwdma_mask = ATA_MWDMA2,
818 .udma_mask = ATA_UDMA5,
819 .port_ops = &hpt374_fn1_port_ops
820 };
821
822 static const int MHz[4] = { 33, 40, 50, 66 };
823 void *private_data = NULL;
824 const struct ata_port_info *ppi[] = { NULL, NULL };
825 u8 rev = dev->revision;
826 u8 irqmask;
827 u8 mcr1;
828 u32 freq;
829 int prefer_dpll = 1;
830
831 unsigned long iobase = pci_resource_start(dev, 4);
832
833 const struct hpt_chip *chip_table;
834 int clock_slot;
835 int rc;
836
837 rc = pcim_enable_device(dev);
838 if (rc)
839 return rc;
840
841 switch (dev->device) {
842 case PCI_DEVICE_ID_TTI_HPT366:
843 /* May be a later chip in disguise. Check */
844 /* Older chips are in the HPT366 driver. Ignore them */
845 if (rev < 3)
846 return -ENODEV;
847 /* N series chips have their own driver. Ignore */
848 if (rev == 6)
849 return -ENODEV;
850
851 switch (rev) {
852 case 3:
853 ppi[0] = &info_hpt370;
854 chip_table = &hpt370;
855 prefer_dpll = 0;
856 break;
857 case 4:
858 ppi[0] = &info_hpt370a;
859 chip_table = &hpt370a;
860 prefer_dpll = 0;
861 break;
862 case 5:
863 ppi[0] = &info_hpt372;
864 chip_table = &hpt372;
865 break;
866 default:
867 pr_err("Unknown HPT366 subtype, please report (%d)\n",
868 rev);
869 return -ENODEV;
870 }
871 break;
872 case PCI_DEVICE_ID_TTI_HPT372:
873 /* 372N if rev >= 2 */
874 if (rev >= 2)
875 return -ENODEV;
876 ppi[0] = &info_hpt372;
877 chip_table = &hpt372a;
878 break;
879 case PCI_DEVICE_ID_TTI_HPT302:
880 /* 302N if rev > 1 */
881 if (rev > 1)
882 return -ENODEV;
883 ppi[0] = &info_hpt302;
884 /* Check this */
885 chip_table = &hpt302;
886 break;
887 case PCI_DEVICE_ID_TTI_HPT371:
888 if (rev > 1)
889 return -ENODEV;
890 ppi[0] = &info_hpt302;
891 chip_table = &hpt371;
892 /*
893 * Single channel device, master is not present but the BIOS
894 * (or us for non x86) must mark it absent
895 */
896 pci_read_config_byte(dev, 0x50, &mcr1);
897 mcr1 &= ~0x04;
898 pci_write_config_byte(dev, 0x50, mcr1);
899 break;
900 case PCI_DEVICE_ID_TTI_HPT374:
901 chip_table = &hpt374;
902 if (!(PCI_FUNC(dev->devfn) & 1))
903 *ppi = &info_hpt374_fn0;
904 else
905 *ppi = &info_hpt374_fn1;
906 break;
907 default:
908 pr_err("PCI table is bogus, please report (%d)\n", dev->device);
909 return -ENODEV;
910 }
911 /* Ok so this is a chip we support */
912
913 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
914 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
915 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
916 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
917
918 pci_read_config_byte(dev, 0x5A, &irqmask);
919 irqmask &= ~0x10;
920 pci_write_config_byte(dev, 0x5a, irqmask);
921
922 /*
923 * default to pci clock. make sure MA15/16 are set to output
924 * to prevent drives having problems with 40-pin cables. Needed
925 * for some drives such as IBM-DTLA which will not enter ready
926 * state on reset when PDIAG is a input.
927 */
928
929 pci_write_config_byte(dev, 0x5b, 0x23);
930
931 /*
932 * HighPoint does this for HPT372A.
933 * NOTE: This register is only writeable via I/O space.
934 */
935 if (chip_table == &hpt372a)
936 outb(0x0e, iobase + 0x9c);
937
938 /*
939 * Some devices do not let this value be accessed via PCI space
940 * according to the old driver. In addition we must use the value
941 * from FN 0 on the HPT374.
942 */
943
944 if (chip_table == &hpt374) {
945 freq = hpt374_read_freq(dev);
946 if (freq == 0)
947 return -ENODEV;
948 } else
949 freq = inl(iobase + 0x90);
950
951 if ((freq >> 12) != 0xABCDE) {
952 int i;
953 u8 sr;
954 u32 total = 0;
955
956 pr_warn("BIOS has not set timing clocks\n");
957
958 /* This is the process the HPT371 BIOS is reported to use */
959 for (i = 0; i < 128; i++) {
960 pci_read_config_byte(dev, 0x78, &sr);
961 total += sr & 0x1FF;
962 udelay(15);
963 }
964 freq = total / 128;
965 }
966 freq &= 0x1FF;
967
968 /*
969 * Turn the frequency check into a band and then find a timing
970 * table to match it.
971 */
972
973 clock_slot = hpt37x_clock_slot(freq, chip_table->base);
974 if (chip_table->clocks[clock_slot] == NULL || prefer_dpll) {
975 /*
976 * We need to try PLL mode instead
977 *
978 * For non UDMA133 capable devices we should
979 * use a 50MHz DPLL by choice
980 */
981 unsigned int f_low, f_high;
982 int dpll, adjust;
983
984 /* Compute DPLL */
985 dpll = (ppi[0]->udma_mask & 0xC0) ? 3 : 2;
986
987 f_low = (MHz[clock_slot] * 48) / MHz[dpll];
988 f_high = f_low + 2;
989 if (clock_slot > 1)
990 f_high += 2;
991
992 /* Select the DPLL clock. */
993 pci_write_config_byte(dev, 0x5b, 0x21);
994 pci_write_config_dword(dev, 0x5C,
995 (f_high << 16) | f_low | 0x100);
996
997 for (adjust = 0; adjust < 8; adjust++) {
998 if (hpt37x_calibrate_dpll(dev))
999 break;
1000 /*
1001 * See if it'll settle at a fractionally
1002 * different clock
1003 */
1004 if (adjust & 1)
1005 f_low -= adjust >> 1;
1006 else
1007 f_high += adjust >> 1;
1008 pci_write_config_dword(dev, 0x5C,
1009 (f_high << 16) | f_low | 0x100);
1010 }
1011 if (adjust == 8) {
1012 pr_err("DPLL did not stabilize!\n");
1013 return -ENODEV;
1014 }
1015 if (dpll == 3)
1016 private_data = (void *)hpt37x_timings_66;
1017 else
1018 private_data = (void *)hpt37x_timings_50;
1019
1020 pr_info("bus clock %dMHz, using %dMHz DPLL\n",
1021 MHz[clock_slot], MHz[dpll]);
1022 } else {
1023 private_data = (void *)chip_table->clocks[clock_slot];
1024 /*
1025 * Perform a final fixup. Note that we will have used the
1026 * DPLL on the HPT372 which means we don't have to worry
1027 * about lack of UDMA133 support on lower clocks
1028 */
1029
1030 if (clock_slot < 2 && ppi[0] == &info_hpt370)
1031 ppi[0] = &info_hpt370_33;
1032 if (clock_slot < 2 && ppi[0] == &info_hpt370a)
1033 ppi[0] = &info_hpt370a_33;
1034
1035 pr_info("%s using %dMHz bus clock\n",
1036 chip_table->name, MHz[clock_slot]);
1037 }
1038
1039 /* Now kick off ATA set up */
1040 return ata_pci_bmdma_init_one(dev, ppi, &hpt37x_sht, private_data, 0);
1041 }
1042
1043 static const struct pci_device_id hpt37x[] = {
1044 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
1045 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
1046 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
1047 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374), },
1048 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
1049
1050 { },
1051 };
1052
1053 static struct pci_driver hpt37x_pci_driver = {
1054 .name = DRV_NAME,
1055 .id_table = hpt37x,
1056 .probe = hpt37x_init_one,
1057 .remove = ata_pci_remove_one
1058 };
1059
1060 module_pci_driver(hpt37x_pci_driver);
1061
1062 MODULE_AUTHOR("Alan Cox");
1063 MODULE_DESCRIPTION("low-level driver for the Highpoint HPT37x/30x");
1064 MODULE_LICENSE("GPL");
1065 MODULE_DEVICE_TABLE(pci, hpt37x);
1066 MODULE_VERSION(DRV_VERSION);
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