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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/init.h>
23#include <linux/blkdev.h>
24#include <linux/delay.h>
25#include <scsi/scsi_host.h>
26#include <linux/libata.h>
27
28#define DRV_NAME "pata_hpt37x"
29#define DRV_VERSION "0.6.23"
30
31struct hpt_clock {
32 u8 xfer_speed;
33 u32 timing;
34};
35
36struct hpt_chip {
37 const char *name;
38 unsigned int base;
39 struct hpt_clock const *clocks[4];
40};
41
42/* key for bus clock timings
43 * bit
44 * 0:3 data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA.
45 * cycles = value + 1
46 * 4:8 data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
47 * cycles = value + 1
48 * 9:12 cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
49 * register access.
50 * 13:17 cmd_low_time. Active time of DIOW_/DIOR_ during task file
51 * register access.
52 * 18:20 udma_cycle_time. Clock cycles for UDMA xfer.
53 * 21 CLK frequency for UDMA: 0=ATA clock, 1=dual ATA clock.
54 * 22:24 pre_high_time. Time to initialize 1st cycle for PIO and MW DMA xfer.
55 * 25:27 cmd_pre_high_time. Time to initialize 1st PIO cycle for task file
56 * register access.
57 * 28 UDMA enable.
58 * 29 DMA enable.
59 * 30 PIO_MST enable. If set, the chip is in bus master mode during
60 * PIO xfer.
61 * 31 FIFO enable. Only for PIO.
62 */
63
64static struct hpt_clock hpt37x_timings_33[] = {
65 { XFER_UDMA_6, 0x12446231 }, /* 0x12646231 ?? */
66 { XFER_UDMA_5, 0x12446231 },
67 { XFER_UDMA_4, 0x12446231 },
68 { XFER_UDMA_3, 0x126c6231 },
69 { XFER_UDMA_2, 0x12486231 },
70 { XFER_UDMA_1, 0x124c6233 },
71 { XFER_UDMA_0, 0x12506297 },
72
73 { XFER_MW_DMA_2, 0x22406c31 },
74 { XFER_MW_DMA_1, 0x22406c33 },
75 { XFER_MW_DMA_0, 0x22406c97 },
76
77 { XFER_PIO_4, 0x06414e31 },
78 { XFER_PIO_3, 0x06414e42 },
79 { XFER_PIO_2, 0x06414e53 },
80 { XFER_PIO_1, 0x06814e93 },
81 { XFER_PIO_0, 0x06814ea7 }
82};
83
84static struct hpt_clock hpt37x_timings_50[] = {
85 { XFER_UDMA_6, 0x12848242 },
86 { XFER_UDMA_5, 0x12848242 },
87 { XFER_UDMA_4, 0x12ac8242 },
88 { XFER_UDMA_3, 0x128c8242 },
89 { XFER_UDMA_2, 0x120c8242 },
90 { XFER_UDMA_1, 0x12148254 },
91 { XFER_UDMA_0, 0x121882ea },
92
93 { XFER_MW_DMA_2, 0x22808242 },
94 { XFER_MW_DMA_1, 0x22808254 },
95 { XFER_MW_DMA_0, 0x228082ea },
96
97 { XFER_PIO_4, 0x0a81f442 },
98 { XFER_PIO_3, 0x0a81f443 },
99 { XFER_PIO_2, 0x0a81f454 },
100 { XFER_PIO_1, 0x0ac1f465 },
101 { XFER_PIO_0, 0x0ac1f48a }
102};
103
104static struct hpt_clock hpt37x_timings_66[] = {
105 { XFER_UDMA_6, 0x1c869c62 },
106 { XFER_UDMA_5, 0x1cae9c62 }, /* 0x1c8a9c62 */
107 { XFER_UDMA_4, 0x1c8a9c62 },
108 { XFER_UDMA_3, 0x1c8e9c62 },
109 { XFER_UDMA_2, 0x1c929c62 },
110 { XFER_UDMA_1, 0x1c9a9c62 },
111 { XFER_UDMA_0, 0x1c829c62 },
112
113 { XFER_MW_DMA_2, 0x2c829c62 },
114 { XFER_MW_DMA_1, 0x2c829c66 },
115 { XFER_MW_DMA_0, 0x2c829d2e },
116
117 { XFER_PIO_4, 0x0c829c62 },
118 { XFER_PIO_3, 0x0c829c84 },
119 { XFER_PIO_2, 0x0c829ca6 },
120 { XFER_PIO_1, 0x0d029d26 },
121 { XFER_PIO_0, 0x0d029d5e }
122};
123
124
125static const struct hpt_chip hpt370 = {
126 "HPT370",
127 48,
128 {
129 hpt37x_timings_33,
130 NULL,
131 NULL,
132 NULL
133 }
134};
135
136static const struct hpt_chip hpt370a = {
137 "HPT370A",
138 48,
139 {
140 hpt37x_timings_33,
141 NULL,
142 hpt37x_timings_50,
143 NULL
144 }
145};
146
147static const struct hpt_chip hpt372 = {
148 "HPT372",
149 55,
150 {
151 hpt37x_timings_33,
152 NULL,
153 hpt37x_timings_50,
154 hpt37x_timings_66
155 }
156};
157
158static const struct hpt_chip hpt302 = {
159 "HPT302",
160 66,
161 {
162 hpt37x_timings_33,
163 NULL,
164 hpt37x_timings_50,
165 hpt37x_timings_66
166 }
167};
168
169static const struct hpt_chip hpt371 = {
170 "HPT371",
171 66,
172 {
173 hpt37x_timings_33,
174 NULL,
175 hpt37x_timings_50,
176 hpt37x_timings_66
177 }
178};
179
180static const struct hpt_chip hpt372a = {
181 "HPT372A",
182 66,
183 {
184 hpt37x_timings_33,
185 NULL,
186 hpt37x_timings_50,
187 hpt37x_timings_66
188 }
189};
190
191static const struct hpt_chip hpt374 = {
192 "HPT374",
193 48,
194 {
195 hpt37x_timings_33,
196 NULL,
197 NULL,
198 NULL
199 }
200};
201
202/**
203 * hpt37x_find_mode - reset the hpt37x bus
204 * @ap: ATA port
205 * @speed: transfer mode
206 *
207 * Return the 32bit register programming information for this channel
208 * that matches the speed provided.
209 */
210
211static u32 hpt37x_find_mode(struct ata_port *ap, int speed)
212{
213 struct hpt_clock *clocks = ap->host->private_data;
214
215 while (clocks->xfer_speed) {
216 if (clocks->xfer_speed == speed)
217 return clocks->timing;
218 clocks++;
219 }
220 BUG();
221 return 0xffffffffU; /* silence compiler warning */
222}
223
224static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,
225 const char * const list[])
226{
227 unsigned char model_num[ATA_ID_PROD_LEN + 1];
228 int i = 0;
229
230 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
231
232 while (list[i] != NULL) {
233 if (!strcmp(list[i], model_num)) {
234 pr_warn("%s is not supported for %s\n",
235 modestr, list[i]);
236 return 1;
237 }
238 i++;
239 }
240 return 0;
241}
242
243static const char * const bad_ata33[] = {
244 "Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3",
245 "Maxtor 90845U3", "Maxtor 90650U2",
246 "Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5",
247 "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
248 "Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6",
249 "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
250 "Maxtor 90510D4",
251 "Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
252 "Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7",
253 "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
254 "Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5",
255 "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
256 NULL
257};
258
259static const char * const bad_ata100_5[] = {
260 "IBM-DTLA-307075",
261 "IBM-DTLA-307060",
262 "IBM-DTLA-307045",
263 "IBM-DTLA-307030",
264 "IBM-DTLA-307020",
265 "IBM-DTLA-307015",
266 "IBM-DTLA-305040",
267 "IBM-DTLA-305030",
268 "IBM-DTLA-305020",
269 "IC35L010AVER07-0",
270 "IC35L020AVER07-0",
271 "IC35L030AVER07-0",
272 "IC35L040AVER07-0",
273 "IC35L060AVER07-0",
274 "WDC AC310200R",
275 NULL
276};
277
278/**
279 * hpt370_filter - mode selection filter
280 * @adev: ATA device
281 *
282 * Block UDMA on devices that cause trouble with this controller.
283 */
284
285static unsigned long hpt370_filter(struct ata_device *adev, unsigned long mask)
286{
287 if (adev->class == ATA_DEV_ATA) {
288 if (hpt_dma_blacklisted(adev, "UDMA", bad_ata33))
289 mask &= ~ATA_MASK_UDMA;
290 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
291 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
292 }
293 return mask;
294}
295
296/**
297 * hpt370a_filter - mode selection filter
298 * @adev: ATA device
299 *
300 * Block UDMA on devices that cause trouble with this controller.
301 */
302
303static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long mask)
304{
305 if (adev->class == ATA_DEV_ATA) {
306 if (hpt_dma_blacklisted(adev, "UDMA100", bad_ata100_5))
307 mask &= ~(0xE0 << ATA_SHIFT_UDMA);
308 }
309 return mask;
310}
311
312/**
313 * hpt372_filter - mode selection filter
314 * @adev: ATA device
315 * @mask: mode mask
316 *
317 * The Marvell bridge chips used on the HighPoint SATA cards do not seem
318 * to support the UltraDMA modes 1, 2, and 3 as well as any MWDMA modes...
319 */
320static unsigned long hpt372_filter(struct ata_device *adev, unsigned long mask)
321{
322 if (ata_id_is_sata(adev->id))
323 mask &= ~((0xE << ATA_SHIFT_UDMA) | ATA_MASK_MWDMA);
324
325 return mask;
326}
327
328/**
329 * hpt37x_cable_detect - Detect the cable type
330 * @ap: ATA port to detect on
331 *
332 * Return the cable type attached to this port
333 */
334
335static int hpt37x_cable_detect(struct ata_port *ap)
336{
337 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
338 u8 scr2, ata66;
339
340 pci_read_config_byte(pdev, 0x5B, &scr2);
341 pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
342
343 udelay(10); /* debounce */
344
345 /* Cable register now active */
346 pci_read_config_byte(pdev, 0x5A, &ata66);
347 /* Restore state */
348 pci_write_config_byte(pdev, 0x5B, scr2);
349
350 if (ata66 & (2 >> ap->port_no))
351 return ATA_CBL_PATA40;
352 else
353 return ATA_CBL_PATA80;
354}
355
356/**
357 * hpt374_fn1_cable_detect - Detect the cable type
358 * @ap: ATA port to detect on
359 *
360 * Return the cable type attached to this port
361 */
362
363static int hpt374_fn1_cable_detect(struct ata_port *ap)
364{
365 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
366 unsigned int mcrbase = 0x50 + 4 * ap->port_no;
367 u16 mcr3;
368 u8 ata66;
369
370 /* Do the extra channel work */
371 pci_read_config_word(pdev, mcrbase + 2, &mcr3);
372 /* Set bit 15 of 0x52 to enable TCBLID as input */
373 pci_write_config_word(pdev, mcrbase + 2, mcr3 | 0x8000);
374 pci_read_config_byte(pdev, 0x5A, &ata66);
375 /* Reset TCBLID/FCBLID to output */
376 pci_write_config_word(pdev, mcrbase + 2, mcr3);
377
378 if (ata66 & (2 >> ap->port_no))
379 return ATA_CBL_PATA40;
380 else
381 return ATA_CBL_PATA80;
382}
383
384/**
385 * hpt37x_pre_reset - reset the hpt37x bus
386 * @link: ATA link to reset
387 * @deadline: deadline jiffies for the operation
388 *
389 * Perform the initial reset handling for the HPT37x.
390 */
391
392static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline)
393{
394 struct ata_port *ap = link->ap;
395 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
396 static const struct pci_bits hpt37x_enable_bits[] = {
397 { 0x50, 1, 0x04, 0x04 },
398 { 0x54, 1, 0x04, 0x04 }
399 };
400
401 if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
402 return -ENOENT;
403
404 /* Reset the state machine */
405 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
406 udelay(100);
407
408 return ata_sff_prereset(link, deadline);
409}
410
411static void hpt370_set_mode(struct ata_port *ap, struct ata_device *adev,
412 u8 mode)
413{
414 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
415 u32 addr1, addr2;
416 u32 reg, timing, mask;
417 u8 fast;
418
419 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
420 addr2 = 0x51 + 4 * ap->port_no;
421
422 /* Fast interrupt prediction disable, hold off interrupt disable */
423 pci_read_config_byte(pdev, addr2, &fast);
424 fast &= ~0x02;
425 fast |= 0x01;
426 pci_write_config_byte(pdev, addr2, fast);
427
428 /* Determine timing mask and find matching mode entry */
429 if (mode < XFER_MW_DMA_0)
430 mask = 0xcfc3ffff;
431 else if (mode < XFER_UDMA_0)
432 mask = 0x31c001ff;
433 else
434 mask = 0x303c0000;
435
436 timing = hpt37x_find_mode(ap, mode);
437
438 pci_read_config_dword(pdev, addr1, ®);
439 reg = (reg & ~mask) | (timing & mask);
440 pci_write_config_dword(pdev, addr1, reg);
441}
442/**
443 * hpt370_set_piomode - PIO setup
444 * @ap: ATA interface
445 * @adev: device on the interface
446 *
447 * Perform PIO mode setup.
448 */
449
450static void hpt370_set_piomode(struct ata_port *ap, struct ata_device *adev)
451{
452 hpt370_set_mode(ap, adev, adev->pio_mode);
453}
454
455/**
456 * hpt370_set_dmamode - DMA timing setup
457 * @ap: ATA interface
458 * @adev: Device being configured
459 *
460 * Set up the channel for MWDMA or UDMA modes.
461 */
462
463static void hpt370_set_dmamode(struct ata_port *ap, struct ata_device *adev)
464{
465 hpt370_set_mode(ap, adev, adev->dma_mode);
466}
467
468/**
469 * hpt370_bmdma_end - DMA engine stop
470 * @qc: ATA command
471 *
472 * Work around the HPT370 DMA engine.
473 */
474
475static void hpt370_bmdma_stop(struct ata_queued_cmd *qc)
476{
477 struct ata_port *ap = qc->ap;
478 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
479 void __iomem *bmdma = ap->ioaddr.bmdma_addr;
480 u8 dma_stat = ioread8(bmdma + ATA_DMA_STATUS);
481 u8 dma_cmd;
482
483 if (dma_stat & ATA_DMA_ACTIVE) {
484 udelay(20);
485 dma_stat = ioread8(bmdma + ATA_DMA_STATUS);
486 }
487 if (dma_stat & ATA_DMA_ACTIVE) {
488 /* Clear the engine */
489 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
490 udelay(10);
491 /* Stop DMA */
492 dma_cmd = ioread8(bmdma + ATA_DMA_CMD);
493 iowrite8(dma_cmd & ~ATA_DMA_START, bmdma + ATA_DMA_CMD);
494 /* Clear Error */
495 dma_stat = ioread8(bmdma + ATA_DMA_STATUS);
496 iowrite8(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR,
497 bmdma + ATA_DMA_STATUS);
498 /* Clear the engine */
499 pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
500 udelay(10);
501 }
502 ata_bmdma_stop(qc);
503}
504
505static void hpt372_set_mode(struct ata_port *ap, struct ata_device *adev,
506 u8 mode)
507{
508 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
509 u32 addr1, addr2;
510 u32 reg, timing, mask;
511 u8 fast;
512
513 addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
514 addr2 = 0x51 + 4 * ap->port_no;
515
516 /* Fast interrupt prediction disable, hold off interrupt disable */
517 pci_read_config_byte(pdev, addr2, &fast);
518 fast &= ~0x07;
519 pci_write_config_byte(pdev, addr2, fast);
520
521 /* Determine timing mask and find matching mode entry */
522 if (mode < XFER_MW_DMA_0)
523 mask = 0xcfc3ffff;
524 else if (mode < XFER_UDMA_0)
525 mask = 0x31c001ff;
526 else
527 mask = 0x303c0000;
528
529 timing = hpt37x_find_mode(ap, mode);
530
531 pci_read_config_dword(pdev, addr1, ®);
532 reg = (reg & ~mask) | (timing & mask);
533 pci_write_config_dword(pdev, addr1, reg);
534}
535
536/**
537 * hpt372_set_piomode - PIO setup
538 * @ap: ATA interface
539 * @adev: device on the interface
540 *
541 * Perform PIO mode setup.
542 */
543
544static void hpt372_set_piomode(struct ata_port *ap, struct ata_device *adev)
545{
546 hpt372_set_mode(ap, adev, adev->pio_mode);
547}
548
549/**
550 * hpt372_set_dmamode - DMA timing setup
551 * @ap: ATA interface
552 * @adev: Device being configured
553 *
554 * Set up the channel for MWDMA or UDMA modes.
555 */
556
557static void hpt372_set_dmamode(struct ata_port *ap, struct ata_device *adev)
558{
559 hpt372_set_mode(ap, adev, adev->dma_mode);
560}
561
562/**
563 * hpt37x_bmdma_end - DMA engine stop
564 * @qc: ATA command
565 *
566 * Clean up after the HPT372 and later DMA engine
567 */
568
569static void hpt37x_bmdma_stop(struct ata_queued_cmd *qc)
570{
571 struct ata_port *ap = qc->ap;
572 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
573 int mscreg = 0x50 + 4 * ap->port_no;
574 u8 bwsr_stat, msc_stat;
575
576 pci_read_config_byte(pdev, 0x6A, &bwsr_stat);
577 pci_read_config_byte(pdev, mscreg, &msc_stat);
578 if (bwsr_stat & (1 << ap->port_no))
579 pci_write_config_byte(pdev, mscreg, msc_stat | 0x30);
580 ata_bmdma_stop(qc);
581}
582
583
584static struct scsi_host_template hpt37x_sht = {
585 ATA_BMDMA_SHT(DRV_NAME),
586};
587
588/*
589 * Configuration for HPT370
590 */
591
592static struct ata_port_operations hpt370_port_ops = {
593 .inherits = &ata_bmdma_port_ops,
594
595 .bmdma_stop = hpt370_bmdma_stop,
596
597 .mode_filter = hpt370_filter,
598 .cable_detect = hpt37x_cable_detect,
599 .set_piomode = hpt370_set_piomode,
600 .set_dmamode = hpt370_set_dmamode,
601 .prereset = hpt37x_pre_reset,
602};
603
604/*
605 * Configuration for HPT370A. Close to 370 but less filters
606 */
607
608static struct ata_port_operations hpt370a_port_ops = {
609 .inherits = &hpt370_port_ops,
610 .mode_filter = hpt370a_filter,
611};
612
613/*
614 * Configuration for HPT371 and HPT302. Slightly different PIO and DMA
615 * mode setting functionality.
616 */
617
618static struct ata_port_operations hpt302_port_ops = {
619 .inherits = &ata_bmdma_port_ops,
620
621 .bmdma_stop = hpt37x_bmdma_stop,
622
623 .cable_detect = hpt37x_cable_detect,
624 .set_piomode = hpt372_set_piomode,
625 .set_dmamode = hpt372_set_dmamode,
626 .prereset = hpt37x_pre_reset,
627};
628
629/*
630 * Configuration for HPT372. Mode setting works like 371 and 302
631 * but we have a mode filter.
632 */
633
634static struct ata_port_operations hpt372_port_ops = {
635 .inherits = &hpt302_port_ops,
636 .mode_filter = hpt372_filter,
637};
638
639/*
640 * Configuration for HPT374. Mode setting and filtering works like 372
641 * but we have a different cable detection procedure for function 1.
642 */
643
644static struct ata_port_operations hpt374_fn1_port_ops = {
645 .inherits = &hpt372_port_ops,
646 .cable_detect = hpt374_fn1_cable_detect,
647};
648
649/**
650 * hpt37x_clock_slot - Turn timing to PC clock entry
651 * @freq: Reported frequency timing
652 * @base: Base timing
653 *
654 * Turn the timing data intoa clock slot (0 for 33, 1 for 40, 2 for 50
655 * and 3 for 66Mhz)
656 */
657
658static int hpt37x_clock_slot(unsigned int freq, unsigned int base)
659{
660 unsigned int f = (base * freq) / 192; /* Mhz */
661 if (f < 40)
662 return 0; /* 33Mhz slot */
663 if (f < 45)
664 return 1; /* 40Mhz slot */
665 if (f < 55)
666 return 2; /* 50Mhz slot */
667 return 3; /* 60Mhz slot */
668}
669
670/**
671 * hpt37x_calibrate_dpll - Calibrate the DPLL loop
672 * @dev: PCI device
673 *
674 * Perform a calibration cycle on the HPT37x DPLL. Returns 1 if this
675 * succeeds
676 */
677
678static int hpt37x_calibrate_dpll(struct pci_dev *dev)
679{
680 u8 reg5b;
681 u32 reg5c;
682 int tries;
683
684 for (tries = 0; tries < 0x5000; tries++) {
685 udelay(50);
686 pci_read_config_byte(dev, 0x5b, ®5b);
687 if (reg5b & 0x80) {
688 /* See if it stays set */
689 for (tries = 0; tries < 0x1000; tries++) {
690 pci_read_config_byte(dev, 0x5b, ®5b);
691 /* Failed ? */
692 if ((reg5b & 0x80) == 0)
693 return 0;
694 }
695 /* Turn off tuning, we have the DPLL set */
696 pci_read_config_dword(dev, 0x5c, ®5c);
697 pci_write_config_dword(dev, 0x5c, reg5c & ~0x100);
698 return 1;
699 }
700 }
701 /* Never went stable */
702 return 0;
703}
704
705static u32 hpt374_read_freq(struct pci_dev *pdev)
706{
707 u32 freq;
708 unsigned long io_base = pci_resource_start(pdev, 4);
709
710 if (PCI_FUNC(pdev->devfn) & 1) {
711 struct pci_dev *pdev_0;
712
713 pdev_0 = pci_get_slot(pdev->bus, pdev->devfn - 1);
714 /* Someone hot plugged the controller on us ? */
715 if (pdev_0 == NULL)
716 return 0;
717 io_base = pci_resource_start(pdev_0, 4);
718 freq = inl(io_base + 0x90);
719 pci_dev_put(pdev_0);
720 } else
721 freq = inl(io_base + 0x90);
722 return freq;
723}
724
725/**
726 * hpt37x_init_one - Initialise an HPT37X/302
727 * @dev: PCI device
728 * @id: Entry in match table
729 *
730 * Initialise an HPT37x device. There are some interesting complications
731 * here. Firstly the chip may report 366 and be one of several variants.
732 * Secondly all the timings depend on the clock for the chip which we must
733 * detect and look up
734 *
735 * This is the known chip mappings. It may be missing a couple of later
736 * releases.
737 *
738 * Chip version PCI Rev Notes
739 * HPT366 4 (HPT366) 0 Other driver
740 * HPT366 4 (HPT366) 1 Other driver
741 * HPT368 4 (HPT366) 2 Other driver
742 * HPT370 4 (HPT366) 3 UDMA100
743 * HPT370A 4 (HPT366) 4 UDMA100
744 * HPT372 4 (HPT366) 5 UDMA133 (1)
745 * HPT372N 4 (HPT366) 6 Other driver
746 * HPT372A 5 (HPT372) 1 UDMA133 (1)
747 * HPT372N 5 (HPT372) 2 Other driver
748 * HPT302 6 (HPT302) 1 UDMA133
749 * HPT302N 6 (HPT302) 2 Other driver
750 * HPT371 7 (HPT371) * UDMA133
751 * HPT374 8 (HPT374) * UDMA133 4 channel
752 * HPT372N 9 (HPT372N) * Other driver
753 *
754 * (1) UDMA133 support depends on the bus clock
755 */
756
757static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
758{
759 /* HPT370 - UDMA100 */
760 static const struct ata_port_info info_hpt370 = {
761 .flags = ATA_FLAG_SLAVE_POSS,
762 .pio_mask = ATA_PIO4,
763 .mwdma_mask = ATA_MWDMA2,
764 .udma_mask = ATA_UDMA5,
765 .port_ops = &hpt370_port_ops
766 };
767 /* HPT370A - UDMA100 */
768 static const struct ata_port_info info_hpt370a = {
769 .flags = ATA_FLAG_SLAVE_POSS,
770 .pio_mask = ATA_PIO4,
771 .mwdma_mask = ATA_MWDMA2,
772 .udma_mask = ATA_UDMA5,
773 .port_ops = &hpt370a_port_ops
774 };
775 /* HPT370 - UDMA66 */
776 static const struct ata_port_info info_hpt370_33 = {
777 .flags = ATA_FLAG_SLAVE_POSS,
778 .pio_mask = ATA_PIO4,
779 .mwdma_mask = ATA_MWDMA2,
780 .udma_mask = ATA_UDMA4,
781 .port_ops = &hpt370_port_ops
782 };
783 /* HPT370A - UDMA66 */
784 static const struct ata_port_info info_hpt370a_33 = {
785 .flags = ATA_FLAG_SLAVE_POSS,
786 .pio_mask = ATA_PIO4,
787 .mwdma_mask = ATA_MWDMA2,
788 .udma_mask = ATA_UDMA4,
789 .port_ops = &hpt370a_port_ops
790 };
791 /* HPT372 - UDMA133 */
792 static const struct ata_port_info info_hpt372 = {
793 .flags = ATA_FLAG_SLAVE_POSS,
794 .pio_mask = ATA_PIO4,
795 .mwdma_mask = ATA_MWDMA2,
796 .udma_mask = ATA_UDMA6,
797 .port_ops = &hpt372_port_ops
798 };
799 /* HPT371, 302 - UDMA133 */
800 static const struct ata_port_info info_hpt302 = {
801 .flags = ATA_FLAG_SLAVE_POSS,
802 .pio_mask = ATA_PIO4,
803 .mwdma_mask = ATA_MWDMA2,
804 .udma_mask = ATA_UDMA6,
805 .port_ops = &hpt302_port_ops
806 };
807 /* HPT374 - UDMA100, function 1 uses different cable_detect method */
808 static const struct ata_port_info info_hpt374_fn0 = {
809 .flags = ATA_FLAG_SLAVE_POSS,
810 .pio_mask = ATA_PIO4,
811 .mwdma_mask = ATA_MWDMA2,
812 .udma_mask = ATA_UDMA5,
813 .port_ops = &hpt372_port_ops
814 };
815 static const struct ata_port_info info_hpt374_fn1 = {
816 .flags = ATA_FLAG_SLAVE_POSS,
817 .pio_mask = ATA_PIO4,
818 .mwdma_mask = ATA_MWDMA2,
819 .udma_mask = ATA_UDMA5,
820 .port_ops = &hpt374_fn1_port_ops
821 };
822
823 static const int MHz[4] = { 33, 40, 50, 66 };
824 void *private_data = NULL;
825 const struct ata_port_info *ppi[] = { NULL, NULL };
826 u8 rev = dev->revision;
827 u8 irqmask;
828 u8 mcr1;
829 u32 freq;
830 int prefer_dpll = 1;
831
832 unsigned long iobase = pci_resource_start(dev, 4);
833
834 const struct hpt_chip *chip_table;
835 int clock_slot;
836 int rc;
837
838 rc = pcim_enable_device(dev);
839 if (rc)
840 return rc;
841
842 switch (dev->device) {
843 case PCI_DEVICE_ID_TTI_HPT366:
844 /* May be a later chip in disguise. Check */
845 /* Older chips are in the HPT366 driver. Ignore them */
846 if (rev < 3)
847 return -ENODEV;
848 /* N series chips have their own driver. Ignore */
849 if (rev == 6)
850 return -ENODEV;
851
852 switch (rev) {
853 case 3:
854 ppi[0] = &info_hpt370;
855 chip_table = &hpt370;
856 prefer_dpll = 0;
857 break;
858 case 4:
859 ppi[0] = &info_hpt370a;
860 chip_table = &hpt370a;
861 prefer_dpll = 0;
862 break;
863 case 5:
864 ppi[0] = &info_hpt372;
865 chip_table = &hpt372;
866 break;
867 default:
868 pr_err("Unknown HPT366 subtype, please report (%d)\n",
869 rev);
870 return -ENODEV;
871 }
872 break;
873 case PCI_DEVICE_ID_TTI_HPT372:
874 /* 372N if rev >= 2 */
875 if (rev >= 2)
876 return -ENODEV;
877 ppi[0] = &info_hpt372;
878 chip_table = &hpt372a;
879 break;
880 case PCI_DEVICE_ID_TTI_HPT302:
881 /* 302N if rev > 1 */
882 if (rev > 1)
883 return -ENODEV;
884 ppi[0] = &info_hpt302;
885 /* Check this */
886 chip_table = &hpt302;
887 break;
888 case PCI_DEVICE_ID_TTI_HPT371:
889 if (rev > 1)
890 return -ENODEV;
891 ppi[0] = &info_hpt302;
892 chip_table = &hpt371;
893 /*
894 * Single channel device, master is not present but the BIOS
895 * (or us for non x86) must mark it absent
896 */
897 pci_read_config_byte(dev, 0x50, &mcr1);
898 mcr1 &= ~0x04;
899 pci_write_config_byte(dev, 0x50, mcr1);
900 break;
901 case PCI_DEVICE_ID_TTI_HPT374:
902 chip_table = &hpt374;
903 if (!(PCI_FUNC(dev->devfn) & 1))
904 *ppi = &info_hpt374_fn0;
905 else
906 *ppi = &info_hpt374_fn1;
907 break;
908 default:
909 pr_err("PCI table is bogus, please report (%d)\n", dev->device);
910 return -ENODEV;
911 }
912 /* Ok so this is a chip we support */
913
914 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
915 pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
916 pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
917 pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
918
919 pci_read_config_byte(dev, 0x5A, &irqmask);
920 irqmask &= ~0x10;
921 pci_write_config_byte(dev, 0x5a, irqmask);
922
923 /*
924 * default to pci clock. make sure MA15/16 are set to output
925 * to prevent drives having problems with 40-pin cables. Needed
926 * for some drives such as IBM-DTLA which will not enter ready
927 * state on reset when PDIAG is a input.
928 */
929
930 pci_write_config_byte(dev, 0x5b, 0x23);
931
932 /*
933 * HighPoint does this for HPT372A.
934 * NOTE: This register is only writeable via I/O space.
935 */
936 if (chip_table == &hpt372a)
937 outb(0x0e, iobase + 0x9c);
938
939 /*
940 * Some devices do not let this value be accessed via PCI space
941 * according to the old driver. In addition we must use the value
942 * from FN 0 on the HPT374.
943 */
944
945 if (chip_table == &hpt374) {
946 freq = hpt374_read_freq(dev);
947 if (freq == 0)
948 return -ENODEV;
949 } else
950 freq = inl(iobase + 0x90);
951
952 if ((freq >> 12) != 0xABCDE) {
953 int i;
954 u8 sr;
955 u32 total = 0;
956
957 pr_warn("BIOS has not set timing clocks\n");
958
959 /* This is the process the HPT371 BIOS is reported to use */
960 for (i = 0; i < 128; i++) {
961 pci_read_config_byte(dev, 0x78, &sr);
962 total += sr & 0x1FF;
963 udelay(15);
964 }
965 freq = total / 128;
966 }
967 freq &= 0x1FF;
968
969 /*
970 * Turn the frequency check into a band and then find a timing
971 * table to match it.
972 */
973
974 clock_slot = hpt37x_clock_slot(freq, chip_table->base);
975 if (chip_table->clocks[clock_slot] == NULL || prefer_dpll) {
976 /*
977 * We need to try PLL mode instead
978 *
979 * For non UDMA133 capable devices we should
980 * use a 50MHz DPLL by choice
981 */
982 unsigned int f_low, f_high;
983 int dpll, adjust;
984
985 /* Compute DPLL */
986 dpll = (ppi[0]->udma_mask & 0xC0) ? 3 : 2;
987
988 f_low = (MHz[clock_slot] * 48) / MHz[dpll];
989 f_high = f_low + 2;
990 if (clock_slot > 1)
991 f_high += 2;
992
993 /* Select the DPLL clock. */
994 pci_write_config_byte(dev, 0x5b, 0x21);
995 pci_write_config_dword(dev, 0x5C,
996 (f_high << 16) | f_low | 0x100);
997
998 for (adjust = 0; adjust < 8; adjust++) {
999 if (hpt37x_calibrate_dpll(dev))
1000 break;
1001 /*
1002 * See if it'll settle at a fractionally
1003 * different clock
1004 */
1005 if (adjust & 1)
1006 f_low -= adjust >> 1;
1007 else
1008 f_high += adjust >> 1;
1009 pci_write_config_dword(dev, 0x5C,
1010 (f_high << 16) | f_low | 0x100);
1011 }
1012 if (adjust == 8) {
1013 pr_err("DPLL did not stabilize!\n");
1014 return -ENODEV;
1015 }
1016 if (dpll == 3)
1017 private_data = (void *)hpt37x_timings_66;
1018 else
1019 private_data = (void *)hpt37x_timings_50;
1020
1021 pr_info("bus clock %dMHz, using %dMHz DPLL\n",
1022 MHz[clock_slot], MHz[dpll]);
1023 } else {
1024 private_data = (void *)chip_table->clocks[clock_slot];
1025 /*
1026 * Perform a final fixup. Note that we will have used the
1027 * DPLL on the HPT372 which means we don't have to worry
1028 * about lack of UDMA133 support on lower clocks
1029 */
1030
1031 if (clock_slot < 2 && ppi[0] == &info_hpt370)
1032 ppi[0] = &info_hpt370_33;
1033 if (clock_slot < 2 && ppi[0] == &info_hpt370a)
1034 ppi[0] = &info_hpt370a_33;
1035
1036 pr_info("%s using %dMHz bus clock\n",
1037 chip_table->name, MHz[clock_slot]);
1038 }
1039
1040 /* Now kick off ATA set up */
1041 return ata_pci_bmdma_init_one(dev, ppi, &hpt37x_sht, private_data, 0);
1042}
1043
1044static const struct pci_device_id hpt37x[] = {
1045 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
1046 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371), },
1047 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372), },
1048 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374), },
1049 { PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302), },
1050
1051 { },
1052};
1053
1054static struct pci_driver hpt37x_pci_driver = {
1055 .name = DRV_NAME,
1056 .id_table = hpt37x,
1057 .probe = hpt37x_init_one,
1058 .remove = ata_pci_remove_one
1059};
1060
1061static int __init hpt37x_init(void)
1062{
1063 return pci_register_driver(&hpt37x_pci_driver);
1064}
1065
1066static void __exit hpt37x_exit(void)
1067{
1068 pci_unregister_driver(&hpt37x_pci_driver);
1069}
1070
1071MODULE_AUTHOR("Alan Cox");
1072MODULE_DESCRIPTION("low-level driver for the Highpoint HPT37x/30x");
1073MODULE_LICENSE("GPL");
1074MODULE_DEVICE_TABLE(pci, hpt37x);
1075MODULE_VERSION(DRV_VERSION);
1076
1077module_init(hpt37x_init);
1078module_exit(hpt37x_exit);