1/*
2 * Promise PATA TX2/TX4/TX2000/133 IDE driver for pdc20268 to pdc20277.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Ported to libata by:
10 * Albert Lee <albertcc@tw.ibm.com> IBM Corporation
11 *
12 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
13 * Portions Copyright (C) 1999 Promise Technology, Inc.
14 *
15 * Author: Frank Tiernan (frankt@promise.com)
16 * Released under terms of General Public License
17 *
18 *
19 * libata documentation is available via 'make {ps|pdf}docs',
20 * as Documentation/driver-api/libata.rst
21 *
22 * Hardware information only available under NDA.
23 *
24 */
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/pci.h>
28#include <linux/blkdev.h>
29#include <linux/delay.h>
30#include <linux/device.h>
31#include <linux/ktime.h>
32#include <scsi/scsi.h>
33#include <scsi/scsi_host.h>
34#include <scsi/scsi_cmnd.h>
35#include <linux/libata.h>
36
37#define DRV_NAME "pata_pdc2027x"
38#define DRV_VERSION "1.0"
39#undef PDC_DEBUG
40
41#ifdef PDC_DEBUG
42#define PDPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
43#else
44#define PDPRINTK(fmt, args...)
45#endif
46
47enum {
48 PDC_MMIO_BAR = 5,
49
50 PDC_UDMA_100 = 0,
51 PDC_UDMA_133 = 1,
52
53 PDC_100_MHZ = 100000000,
54 PDC_133_MHZ = 133333333,
55
56 PDC_SYS_CTL = 0x1100,
57 PDC_ATA_CTL = 0x1104,
58 PDC_GLOBAL_CTL = 0x1108,
59 PDC_CTCR0 = 0x110C,
60 PDC_CTCR1 = 0x1110,
61 PDC_BYTE_COUNT = 0x1120,
62 PDC_PLL_CTL = 0x1202,
63};
64
65static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
66#ifdef CONFIG_PM_SLEEP
67static int pdc2027x_reinit_one(struct pci_dev *pdev);
68#endif
69static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline);
70static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev);
71static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);
72static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc);
73static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask);
74static int pdc2027x_cable_detect(struct ata_port *ap);
75static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed);
76
77/*
78 * ATA Timing Tables based on 133MHz controller clock.
79 * These tables are only used when the controller is in 133MHz clock.
80 * If the controller is in 100MHz clock, the ASIC hardware will
81 * set the timing registers automatically when "set feature" command
82 * is issued to the device. However, if the controller clock is 133MHz,
83 * the following tables must be used.
84 */
85static const struct pdc2027x_pio_timing {
86 u8 value0, value1, value2;
87} pdc2027x_pio_timing_tbl[] = {
88 { 0xfb, 0x2b, 0xac }, /* PIO mode 0 */
89 { 0x46, 0x29, 0xa4 }, /* PIO mode 1 */
90 { 0x23, 0x26, 0x64 }, /* PIO mode 2 */
91 { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */
92 { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */
93};
94
95static const struct pdc2027x_mdma_timing {
96 u8 value0, value1;
97} pdc2027x_mdma_timing_tbl[] = {
98 { 0xdf, 0x5f }, /* MDMA mode 0 */
99 { 0x6b, 0x27 }, /* MDMA mode 1 */
100 { 0x69, 0x25 }, /* MDMA mode 2 */
101};
102
103static const struct pdc2027x_udma_timing {
104 u8 value0, value1, value2;
105} pdc2027x_udma_timing_tbl[] = {
106 { 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */
107 { 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */
108 { 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */
109 { 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */
110 { 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */
111 { 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */
112 { 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */
113};
114
115static const struct pci_device_id pdc2027x_pci_tbl[] = {
116 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), PDC_UDMA_100 },
117 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), PDC_UDMA_133 },
118 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), PDC_UDMA_100 },
119 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), PDC_UDMA_133 },
120 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), PDC_UDMA_133 },
121 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), PDC_UDMA_133 },
122 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), PDC_UDMA_133 },
123
124 { } /* terminate list */
125};
126
127static struct pci_driver pdc2027x_pci_driver = {
128 .name = DRV_NAME,
129 .id_table = pdc2027x_pci_tbl,
130 .probe = pdc2027x_init_one,
131 .remove = ata_pci_remove_one,
132#ifdef CONFIG_PM_SLEEP
133 .suspend = ata_pci_device_suspend,
134 .resume = pdc2027x_reinit_one,
135#endif
136};
137
138static struct scsi_host_template pdc2027x_sht = {
139 ATA_BMDMA_SHT(DRV_NAME),
140};
141
142static struct ata_port_operations pdc2027x_pata100_ops = {
143 .inherits = &ata_bmdma_port_ops,
144 .check_atapi_dma = pdc2027x_check_atapi_dma,
145 .cable_detect = pdc2027x_cable_detect,
146 .prereset = pdc2027x_prereset,
147};
148
149static struct ata_port_operations pdc2027x_pata133_ops = {
150 .inherits = &pdc2027x_pata100_ops,
151 .mode_filter = pdc2027x_mode_filter,
152 .set_piomode = pdc2027x_set_piomode,
153 .set_dmamode = pdc2027x_set_dmamode,
154 .set_mode = pdc2027x_set_mode,
155};
156
157static struct ata_port_info pdc2027x_port_info[] = {
158 /* PDC_UDMA_100 */
159 {
160 .flags = ATA_FLAG_SLAVE_POSS,
161 .pio_mask = ATA_PIO4,
162 .mwdma_mask = ATA_MWDMA2,
163 .udma_mask = ATA_UDMA5,
164 .port_ops = &pdc2027x_pata100_ops,
165 },
166 /* PDC_UDMA_133 */
167 {
168 .flags = ATA_FLAG_SLAVE_POSS,
169 .pio_mask = ATA_PIO4,
170 .mwdma_mask = ATA_MWDMA2,
171 .udma_mask = ATA_UDMA6,
172 .port_ops = &pdc2027x_pata133_ops,
173 },
174};
175
176MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Albert Lee");
177MODULE_DESCRIPTION("libata driver module for Promise PDC20268 to PDC20277");
178MODULE_LICENSE("GPL");
179MODULE_VERSION(DRV_VERSION);
180MODULE_DEVICE_TABLE(pci, pdc2027x_pci_tbl);
181
182/**
183 * port_mmio - Get the MMIO address of PDC2027x extended registers
184 * @ap: Port
185 * @offset: offset from mmio base
186 */
187static inline void __iomem *port_mmio(struct ata_port *ap, unsigned int offset)
188{
189 return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset;
190}
191
192/**
193 * dev_mmio - Get the MMIO address of PDC2027x extended registers
194 * @ap: Port
195 * @adev: device
196 * @offset: offset from mmio base
197 */
198static inline void __iomem *dev_mmio(struct ata_port *ap, struct ata_device *adev, unsigned int offset)
199{
200 u8 adj = (adev->devno) ? 0x08 : 0x00;
201 return port_mmio(ap, offset) + adj;
202}
203
204/**
205 * pdc2027x_pata_cable_detect - Probe host controller cable detect info
206 * @ap: Port for which cable detect info is desired
207 *
208 * Read 80c cable indicator from Promise extended register.
209 * This register is latched when the system is reset.
210 *
211 * LOCKING:
212 * None (inherited from caller).
213 */
214static int pdc2027x_cable_detect(struct ata_port *ap)
215{
216 u32 cgcr;
217
218 /* check cable detect results */
219 cgcr = ioread32(port_mmio(ap, PDC_GLOBAL_CTL));
220 if (cgcr & (1 << 26))
221 goto cbl40;
222
223 PDPRINTK("No cable or 80-conductor cable on port %d\n", ap->port_no);
224
225 return ATA_CBL_PATA80;
226cbl40:
227 printk(KERN_INFO DRV_NAME ": 40-conductor cable detected on port %d\n", ap->port_no);
228 return ATA_CBL_PATA40;
229}
230
231/**
232 * pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled.
233 * @ap: Port to check
234 */
235static inline int pdc2027x_port_enabled(struct ata_port *ap)
236{
237 return ioread8(port_mmio(ap, PDC_ATA_CTL)) & 0x02;
238}
239
240/**
241 * pdc2027x_prereset - prereset for PATA host controller
242 * @link: Target link
243 * @deadline: deadline jiffies for the operation
244 *
245 * Probeinit including cable detection.
246 *
247 * LOCKING:
248 * None (inherited from caller).
249 */
250
251static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline)
252{
253 /* Check whether port enabled */
254 if (!pdc2027x_port_enabled(link->ap))
255 return -ENOENT;
256 return ata_sff_prereset(link, deadline);
257}
258
259/**
260 * pdc2720x_mode_filter - mode selection filter
261 * @adev: ATA device
262 * @mask: list of modes proposed
263 *
264 * Block UDMA on devices that cause trouble with this controller.
265 */
266
267static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask)
268{
269 unsigned char model_num[ATA_ID_PROD_LEN + 1];
270 struct ata_device *pair = ata_dev_pair(adev);
271
272 if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL)
273 return mask;
274
275 /* Check for slave of a Maxtor at UDMA6 */
276 ata_id_c_string(pair->id, model_num, ATA_ID_PROD,
277 ATA_ID_PROD_LEN + 1);
278 /* If the master is a maxtor in UDMA6 then the slave should not use UDMA 6 */
279 if (strstr(model_num, "Maxtor") == NULL && pair->dma_mode == XFER_UDMA_6)
280 mask &= ~ (1 << (6 + ATA_SHIFT_UDMA));
281
282 return mask;
283}
284
285/**
286 * pdc2027x_set_piomode - Initialize host controller PATA PIO timings
287 * @ap: Port to configure
288 * @adev: um
289 *
290 * Set PIO mode for device.
291 *
292 * LOCKING:
293 * None (inherited from caller).
294 */
295
296static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev)
297{
298 unsigned int pio = adev->pio_mode - XFER_PIO_0;
299 u32 ctcr0, ctcr1;
300
301 PDPRINTK("adev->pio_mode[%X]\n", adev->pio_mode);
302
303 /* Sanity check */
304 if (pio > 4) {
305 printk(KERN_ERR DRV_NAME ": Unknown pio mode [%d] ignored\n", pio);
306 return;
307
308 }
309
310 /* Set the PIO timing registers using value table for 133MHz */
311 PDPRINTK("Set pio regs... \n");
312
313 ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0));
314 ctcr0 &= 0xffff0000;
315 ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 |
316 (pdc2027x_pio_timing_tbl[pio].value1 << 8);
317 iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
318
319 ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
320 ctcr1 &= 0x00ffffff;
321 ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24);
322 iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
323
324 PDPRINTK("Set pio regs done\n");
325
326 PDPRINTK("Set to pio mode[%u] \n", pio);
327}
328
329/**
330 * pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings
331 * @ap: Port to configure
332 * @adev: um
333 *
334 * Set UDMA mode for device.
335 *
336 * LOCKING:
337 * None (inherited from caller).
338 */
339static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
340{
341 unsigned int dma_mode = adev->dma_mode;
342 u32 ctcr0, ctcr1;
343
344 if ((dma_mode >= XFER_UDMA_0) &&
345 (dma_mode <= XFER_UDMA_6)) {
346 /* Set the UDMA timing registers with value table for 133MHz */
347 unsigned int udma_mode = dma_mode & 0x07;
348
349 if (dma_mode == XFER_UDMA_2) {
350 /*
351 * Turn off tHOLD.
352 * If tHOLD is '1', the hardware will add half clock for data hold time.
353 * This code segment seems to be no effect. tHOLD will be overwritten below.
354 */
355 ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
356 iowrite32(ctcr1 & ~(1 << 7), dev_mmio(ap, adev, PDC_CTCR1));
357 }
358
359 PDPRINTK("Set udma regs... \n");
360
361 ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1));
362 ctcr1 &= 0xff000000;
363 ctcr1 |= pdc2027x_udma_timing_tbl[udma_mode].value0 |
364 (pdc2027x_udma_timing_tbl[udma_mode].value1 << 8) |
365 (pdc2027x_udma_timing_tbl[udma_mode].value2 << 16);
366 iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
367
368 PDPRINTK("Set udma regs done\n");
369
370 PDPRINTK("Set to udma mode[%u] \n", udma_mode);
371
372 } else if ((dma_mode >= XFER_MW_DMA_0) &&
373 (dma_mode <= XFER_MW_DMA_2)) {
374 /* Set the MDMA timing registers with value table for 133MHz */
375 unsigned int mdma_mode = dma_mode & 0x07;
376
377 PDPRINTK("Set mdma regs... \n");
378 ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0));
379
380 ctcr0 &= 0x0000ffff;
381 ctcr0 |= (pdc2027x_mdma_timing_tbl[mdma_mode].value0 << 16) |
382 (pdc2027x_mdma_timing_tbl[mdma_mode].value1 << 24);
383
384 iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
385 PDPRINTK("Set mdma regs done\n");
386
387 PDPRINTK("Set to mdma mode[%u] \n", mdma_mode);
388 } else {
389 printk(KERN_ERR DRV_NAME ": Unknown dma mode [%u] ignored\n", dma_mode);
390 }
391}
392
393/**
394 * pdc2027x_set_mode - Set the timing registers back to correct values.
395 * @link: link to configure
396 * @r_failed: Returned device for failure
397 *
398 * The pdc2027x hardware will look at "SET FEATURES" and change the timing registers
399 * automatically. The values set by the hardware might be incorrect, under 133Mhz PLL.
400 * This function overwrites the possibly incorrect values set by the hardware to be correct.
401 */
402static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed)
403{
404 struct ata_port *ap = link->ap;
405 struct ata_device *dev;
406 int rc;
407
408 rc = ata_do_set_mode(link, r_failed);
409 if (rc < 0)
410 return rc;
411
412 ata_for_each_dev(dev, link, ENABLED) {
413 pdc2027x_set_piomode(ap, dev);
414
415 /*
416 * Enable prefetch if the device support PIO only.
417 */
418 if (dev->xfer_shift == ATA_SHIFT_PIO) {
419 u32 ctcr1 = ioread32(dev_mmio(ap, dev, PDC_CTCR1));
420 ctcr1 |= (1 << 25);
421 iowrite32(ctcr1, dev_mmio(ap, dev, PDC_CTCR1));
422
423 PDPRINTK("Turn on prefetch\n");
424 } else {
425 pdc2027x_set_dmamode(ap, dev);
426 }
427 }
428 return 0;
429}
430
431/**
432 * pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
433 * @qc: Metadata associated with taskfile to check
434 *
435 * LOCKING:
436 * None (inherited from caller).
437 *
438 * RETURNS: 0 when ATAPI DMA can be used
439 * 1 otherwise
440 */
441static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc)
442{
443 struct scsi_cmnd *cmd = qc->scsicmd;
444 u8 *scsicmd = cmd->cmnd;
445 int rc = 1; /* atapi dma off by default */
446
447 /*
448 * This workaround is from Promise's GPL driver.
449 * If ATAPI DMA is used for commands not in the
450 * following white list, say MODE_SENSE and REQUEST_SENSE,
451 * pdc2027x might hit the irq lost problem.
452 */
453 switch (scsicmd[0]) {
454 case READ_10:
455 case WRITE_10:
456 case READ_12:
457 case WRITE_12:
458 case READ_6:
459 case WRITE_6:
460 case 0xad: /* READ_DVD_STRUCTURE */
461 case 0xbe: /* READ_CD */
462 /* ATAPI DMA is ok */
463 rc = 0;
464 break;
465 default:
466 ;
467 }
468
469 return rc;
470}
471
472/**
473 * pdc_read_counter - Read the ctr counter
474 * @host: target ATA host
475 */
476
477static long pdc_read_counter(struct ata_host *host)
478{
479 void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];
480 long counter;
481 int retry = 1;
482 u32 bccrl, bccrh, bccrlv, bccrhv;
483
484retry:
485 bccrl = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
486 bccrh = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
487
488 /* Read the counter values again for verification */
489 bccrlv = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
490 bccrhv = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
491
492 counter = (bccrh << 15) | bccrl;
493
494 PDPRINTK("bccrh [%X] bccrl [%X]\n", bccrh, bccrl);
495 PDPRINTK("bccrhv[%X] bccrlv[%X]\n", bccrhv, bccrlv);
496
497 /*
498 * The 30-bit decreasing counter are read by 2 pieces.
499 * Incorrect value may be read when both bccrh and bccrl are changing.
500 * Ex. When 7900 decrease to 78FF, wrong value 7800 might be read.
501 */
502 if (retry && !(bccrh == bccrhv && bccrl >= bccrlv)) {
503 retry--;
504 PDPRINTK("rereading counter\n");
505 goto retry;
506 }
507
508 return counter;
509}
510
511/**
512 * adjust_pll - Adjust the PLL input clock in Hz.
513 *
514 * @pdc_controller: controller specific information
515 * @host: target ATA host
516 * @pll_clock: The input of PLL in HZ
517 */
518static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int board_idx)
519{
520 void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];
521 u16 pll_ctl;
522 long pll_clock_khz = pll_clock / 1000;
523 long pout_required = board_idx? PDC_133_MHZ:PDC_100_MHZ;
524 long ratio = pout_required / pll_clock_khz;
525 int F, R;
526
527 /* Sanity check */
528 if (unlikely(pll_clock_khz < 5000L || pll_clock_khz > 70000L)) {
529 printk(KERN_ERR DRV_NAME ": Invalid PLL input clock %ldkHz, give up!\n", pll_clock_khz);
530 return;
531 }
532
533#ifdef PDC_DEBUG
534 PDPRINTK("pout_required is %ld\n", pout_required);
535
536 /* Show the current clock value of PLL control register
537 * (maybe already configured by the firmware)
538 */
539 pll_ctl = ioread16(mmio_base + PDC_PLL_CTL);
540
541 PDPRINTK("pll_ctl[%X]\n", pll_ctl);
542#endif
543
544 /*
545 * Calculate the ratio of F, R and OD
546 * POUT = (F + 2) / (( R + 2) * NO)
547 */
548 if (ratio < 8600L) { /* 8.6x */
549 /* Using NO = 0x01, R = 0x0D */
550 R = 0x0d;
551 } else if (ratio < 12900L) { /* 12.9x */
552 /* Using NO = 0x01, R = 0x08 */
553 R = 0x08;
554 } else if (ratio < 16100L) { /* 16.1x */
555 /* Using NO = 0x01, R = 0x06 */
556 R = 0x06;
557 } else if (ratio < 64000L) { /* 64x */
558 R = 0x00;
559 } else {
560 /* Invalid ratio */
561 printk(KERN_ERR DRV_NAME ": Invalid ratio %ld, give up!\n", ratio);
562 return;
563 }
564
565 F = (ratio * (R+2)) / 1000 - 2;
566
567 if (unlikely(F < 0 || F > 127)) {
568 /* Invalid F */
569 printk(KERN_ERR DRV_NAME ": F[%d] invalid!\n", F);
570 return;
571 }
572
573 PDPRINTK("F[%d] R[%d] ratio*1000[%ld]\n", F, R, ratio);
574
575 pll_ctl = (R << 8) | F;
576
577 PDPRINTK("Writing pll_ctl[%X]\n", pll_ctl);
578
579 iowrite16(pll_ctl, mmio_base + PDC_PLL_CTL);
580 ioread16(mmio_base + PDC_PLL_CTL); /* flush */
581
582 /* Wait the PLL circuit to be stable */
583 msleep(30);
584
585#ifdef PDC_DEBUG
586 /*
587 * Show the current clock value of PLL control register
588 * (maybe configured by the firmware)
589 */
590 pll_ctl = ioread16(mmio_base + PDC_PLL_CTL);
591
592 PDPRINTK("pll_ctl[%X]\n", pll_ctl);
593#endif
594
595 return;
596}
597
598/**
599 * detect_pll_input_clock - Detect the PLL input clock in Hz.
600 * @host: target ATA host
601 * Ex. 16949000 on 33MHz PCI bus for pdc20275.
602 * Half of the PCI clock.
603 */
604static long pdc_detect_pll_input_clock(struct ata_host *host)
605{
606 void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];
607 u32 scr;
608 long start_count, end_count;
609 ktime_t start_time, end_time;
610 long pll_clock, usec_elapsed;
611
612 /* Start the test mode */
613 scr = ioread32(mmio_base + PDC_SYS_CTL);
614 PDPRINTK("scr[%X]\n", scr);
615 iowrite32(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL);
616 ioread32(mmio_base + PDC_SYS_CTL); /* flush */
617
618 /* Read current counter value */
619 start_count = pdc_read_counter(host);
620 start_time = ktime_get();
621
622 /* Let the counter run for 100 ms. */
623 msleep(100);
624
625 /* Read the counter values again */
626 end_count = pdc_read_counter(host);
627 end_time = ktime_get();
628
629 /* Stop the test mode */
630 scr = ioread32(mmio_base + PDC_SYS_CTL);
631 PDPRINTK("scr[%X]\n", scr);
632 iowrite32(scr & ~(0x01 << 14), mmio_base + PDC_SYS_CTL);
633 ioread32(mmio_base + PDC_SYS_CTL); /* flush */
634
635 /* calculate the input clock in Hz */
636 usec_elapsed = (long) ktime_us_delta(end_time, start_time);
637
638 pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *
639 (100000000 / usec_elapsed);
640
641 PDPRINTK("start[%ld] end[%ld] \n", start_count, end_count);
642 PDPRINTK("PLL input clock[%ld]Hz\n", pll_clock);
643
644 return pll_clock;
645}
646
647/**
648 * pdc_hardware_init - Initialize the hardware.
649 * @host: target ATA host
650 * @board_idx: board identifier
651 */
652static void pdc_hardware_init(struct ata_host *host, unsigned int board_idx)
653{
654 long pll_clock;
655
656 /*
657 * Detect PLL input clock rate.
658 * On some system, where PCI bus is running at non-standard clock rate.
659 * Ex. 25MHz or 40MHz, we have to adjust the cycle_time.
660 * The pdc20275 controller employs PLL circuit to help correct timing registers setting.
661 */
662 pll_clock = pdc_detect_pll_input_clock(host);
663
664 dev_info(host->dev, "PLL input clock %ld kHz\n", pll_clock/1000);
665
666 /* Adjust PLL control register */
667 pdc_adjust_pll(host, pll_clock, board_idx);
668}
669
670/**
671 * pdc_ata_setup_port - setup the mmio address
672 * @port: ata ioports to setup
673 * @base: base address
674 */
675static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base)
676{
677 port->cmd_addr =
678 port->data_addr = base;
679 port->feature_addr =
680 port->error_addr = base + 0x05;
681 port->nsect_addr = base + 0x0a;
682 port->lbal_addr = base + 0x0f;
683 port->lbam_addr = base + 0x10;
684 port->lbah_addr = base + 0x15;
685 port->device_addr = base + 0x1a;
686 port->command_addr =
687 port->status_addr = base + 0x1f;
688 port->altstatus_addr =
689 port->ctl_addr = base + 0x81a;
690}
691
692/**
693 * pdc2027x_init_one - PCI probe function
694 * Called when an instance of PCI adapter is inserted.
695 * This function checks whether the hardware is supported,
696 * initialize hardware and register an instance of ata_host to
697 * libata. (implements struct pci_driver.probe() )
698 *
699 * @pdev: instance of pci_dev found
700 * @ent: matching entry in the id_tbl[]
701 */
702static int pdc2027x_init_one(struct pci_dev *pdev,
703 const struct pci_device_id *ent)
704{
705 static const unsigned long cmd_offset[] = { 0x17c0, 0x15c0 };
706 static const unsigned long bmdma_offset[] = { 0x1000, 0x1008 };
707 unsigned int board_idx = (unsigned int) ent->driver_data;
708 const struct ata_port_info *ppi[] =
709 { &pdc2027x_port_info[board_idx], NULL };
710 struct ata_host *host;
711 void __iomem *mmio_base;
712 int i, rc;
713
714 ata_print_version_once(&pdev->dev, DRV_VERSION);
715
716 /* alloc host */
717 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
718 if (!host)
719 return -ENOMEM;
720
721 /* acquire resources and fill host */
722 rc = pcim_enable_device(pdev);
723 if (rc)
724 return rc;
725
726 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
727 if (rc)
728 return rc;
729 host->iomap = pcim_iomap_table(pdev);
730
731 rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);
732 if (rc)
733 return rc;
734
735 rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);
736 if (rc)
737 return rc;
738
739 mmio_base = host->iomap[PDC_MMIO_BAR];
740
741 for (i = 0; i < 2; i++) {
742 struct ata_port *ap = host->ports[i];
743
744 pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]);
745 ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i];
746
747 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
748 ata_port_pbar_desc(ap, PDC_MMIO_BAR, cmd_offset[i], "cmd");
749 }
750
751 //pci_enable_intx(pdev);
752
753 /* initialize adapter */
754 pdc_hardware_init(host, board_idx);
755
756 pci_set_master(pdev);
757 return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
758 IRQF_SHARED, &pdc2027x_sht);
759}
760
761#ifdef CONFIG_PM_SLEEP
762static int pdc2027x_reinit_one(struct pci_dev *pdev)
763{
764 struct ata_host *host = pci_get_drvdata(pdev);
765 unsigned int board_idx;
766 int rc;
767
768 rc = ata_pci_device_do_resume(pdev);
769 if (rc)
770 return rc;
771
772 if (pdev->device == PCI_DEVICE_ID_PROMISE_20268 ||
773 pdev->device == PCI_DEVICE_ID_PROMISE_20270)
774 board_idx = PDC_UDMA_100;
775 else
776 board_idx = PDC_UDMA_133;
777
778 pdc_hardware_init(host, board_idx);
779
780 ata_host_resume(host);
781 return 0;
782}
783#endif
784
785module_pci_driver(pdc2027x_pci_driver);
786