blob: 90a106308c4f7ee21fd12565cbc1ff429f2eebde [file] [log] [blame]
Takahiro Shimizu863d08e2012-03-07 22:16:26 +00001/*
2 * PTP 1588 clock using the EG20T PCH
3 *
4 * Copyright (C) 2010 OMICRON electronics GmbH
5 * Copyright (C) 2011-2012 LAPIS SEMICONDUCTOR Co., LTD.
6 *
7 * This code was derived from the IXP46X driver.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
21 */
22
23#include <linux/device.h>
24#include <linux/err.h>
25#include <linux/init.h>
26#include <linux/interrupt.h>
27#include <linux/io.h>
28#include <linux/irq.h>
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/pci.h>
32#include <linux/ptp_clock_kernel.h>
Geert Uytterhoeven769b0da2012-05-16 01:50:17 +000033#include <linux/slab.h>
Takahiro Shimizu863d08e2012-03-07 22:16:26 +000034
35#define STATION_ADDR_LEN 20
36#define PCI_DEVICE_ID_PCH_1588 0x8819
37#define IO_MEM_BAR 1
38
39#define DEFAULT_ADDEND 0xA0000000
40#define TICKS_NS_SHIFT 5
41#define N_EXT_TS 2
42
43enum pch_status {
44 PCH_SUCCESS,
45 PCH_INVALIDPARAM,
46 PCH_NOTIMESTAMP,
47 PCH_INTERRUPTMODEINUSE,
48 PCH_FAILED,
49 PCH_UNSUPPORTED,
50};
51/**
52 * struct pch_ts_regs - IEEE 1588 registers
53 */
54struct pch_ts_regs {
55 u32 control;
56 u32 event;
57 u32 addend;
58 u32 accum;
59 u32 test;
60 u32 ts_compare;
61 u32 rsystime_lo;
62 u32 rsystime_hi;
63 u32 systime_lo;
64 u32 systime_hi;
65 u32 trgt_lo;
66 u32 trgt_hi;
67 u32 asms_lo;
68 u32 asms_hi;
69 u32 amms_lo;
70 u32 amms_hi;
71 u32 ch_control;
72 u32 ch_event;
73 u32 tx_snap_lo;
74 u32 tx_snap_hi;
75 u32 rx_snap_lo;
76 u32 rx_snap_hi;
77 u32 src_uuid_lo;
78 u32 src_uuid_hi;
79 u32 can_status;
80 u32 can_snap_lo;
81 u32 can_snap_hi;
82 u32 ts_sel;
83 u32 ts_st[6];
84 u32 reserve1[14];
85 u32 stl_max_set_en;
86 u32 stl_max_set;
87 u32 reserve2[13];
88 u32 srst;
89};
90
91#define PCH_TSC_RESET (1 << 0)
92#define PCH_TSC_TTM_MASK (1 << 1)
93#define PCH_TSC_ASMS_MASK (1 << 2)
94#define PCH_TSC_AMMS_MASK (1 << 3)
95#define PCH_TSC_PPSM_MASK (1 << 4)
96#define PCH_TSE_TTIPEND (1 << 1)
97#define PCH_TSE_SNS (1 << 2)
98#define PCH_TSE_SNM (1 << 3)
99#define PCH_TSE_PPS (1 << 4)
100#define PCH_CC_MM (1 << 0)
101#define PCH_CC_TA (1 << 1)
102
103#define PCH_CC_MODE_SHIFT 16
104#define PCH_CC_MODE_MASK 0x001F0000
105#define PCH_CC_VERSION (1 << 31)
106#define PCH_CE_TXS (1 << 0)
107#define PCH_CE_RXS (1 << 1)
108#define PCH_CE_OVR (1 << 0)
109#define PCH_CE_VAL (1 << 1)
110#define PCH_ECS_ETH (1 << 0)
111
112#define PCH_ECS_CAN (1 << 1)
113#define PCH_STATION_BYTES 6
114
115#define PCH_IEEE1588_ETH (1 << 0)
116#define PCH_IEEE1588_CAN (1 << 1)
117/**
118 * struct pch_dev - Driver private data
119 */
120struct pch_dev {
Sahara7d3ac5c2013-03-26 19:07:23 +0000121 struct pch_ts_regs __iomem *regs;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000122 struct ptp_clock *ptp_clock;
123 struct ptp_clock_info caps;
124 int exts0_enabled;
125 int exts1_enabled;
126
127 u32 mem_base;
128 u32 mem_size;
129 u32 irq;
130 struct pci_dev *pdev;
131 spinlock_t register_lock;
132};
133
134/**
135 * struct pch_params - 1588 module parameter
136 */
137struct pch_params {
138 u8 station[STATION_ADDR_LEN];
139};
140
141/* structure to hold the module parameters */
142static struct pch_params pch_param = {
143 "00:00:00:00:00:00"
144};
145
146/*
147 * Register access functions
148 */
149static inline void pch_eth_enable_set(struct pch_dev *chip)
150{
151 u32 val;
152 /* SET the eth_enable bit */
153 val = ioread32(&chip->regs->ts_sel) | (PCH_ECS_ETH);
154 iowrite32(val, (&chip->regs->ts_sel));
155}
156
Sahara7d3ac5c2013-03-26 19:07:23 +0000157static u64 pch_systime_read(struct pch_ts_regs __iomem *regs)
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000158{
159 u64 ns;
160 u32 lo, hi;
161
162 lo = ioread32(&regs->systime_lo);
163 hi = ioread32(&regs->systime_hi);
164
165 ns = ((u64) hi) << 32;
166 ns |= lo;
167 ns <<= TICKS_NS_SHIFT;
168
169 return ns;
170}
171
Sahara7d3ac5c2013-03-26 19:07:23 +0000172static void pch_systime_write(struct pch_ts_regs __iomem *regs, u64 ns)
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000173{
174 u32 hi, lo;
175
176 ns >>= TICKS_NS_SHIFT;
177 hi = ns >> 32;
178 lo = ns & 0xffffffff;
179
180 iowrite32(lo, &regs->systime_lo);
181 iowrite32(hi, &regs->systime_hi);
182}
183
184static inline void pch_block_reset(struct pch_dev *chip)
185{
186 u32 val;
187 /* Reset Hardware Assist block */
188 val = ioread32(&chip->regs->control) | PCH_TSC_RESET;
189 iowrite32(val, (&chip->regs->control));
190 val = val & ~PCH_TSC_RESET;
191 iowrite32(val, (&chip->regs->control));
192}
193
194u32 pch_ch_control_read(struct pci_dev *pdev)
195{
196 struct pch_dev *chip = pci_get_drvdata(pdev);
197 u32 val;
198
199 val = ioread32(&chip->regs->ch_control);
200
201 return val;
202}
203EXPORT_SYMBOL(pch_ch_control_read);
204
205void pch_ch_control_write(struct pci_dev *pdev, u32 val)
206{
207 struct pch_dev *chip = pci_get_drvdata(pdev);
208
209 iowrite32(val, (&chip->regs->ch_control));
210}
211EXPORT_SYMBOL(pch_ch_control_write);
212
213u32 pch_ch_event_read(struct pci_dev *pdev)
214{
215 struct pch_dev *chip = pci_get_drvdata(pdev);
216 u32 val;
217
218 val = ioread32(&chip->regs->ch_event);
219
220 return val;
221}
222EXPORT_SYMBOL(pch_ch_event_read);
223
224void pch_ch_event_write(struct pci_dev *pdev, u32 val)
225{
226 struct pch_dev *chip = pci_get_drvdata(pdev);
227
228 iowrite32(val, (&chip->regs->ch_event));
229}
230EXPORT_SYMBOL(pch_ch_event_write);
231
232u32 pch_src_uuid_lo_read(struct pci_dev *pdev)
233{
234 struct pch_dev *chip = pci_get_drvdata(pdev);
235 u32 val;
236
237 val = ioread32(&chip->regs->src_uuid_lo);
238
239 return val;
240}
241EXPORT_SYMBOL(pch_src_uuid_lo_read);
242
243u32 pch_src_uuid_hi_read(struct pci_dev *pdev)
244{
245 struct pch_dev *chip = pci_get_drvdata(pdev);
246 u32 val;
247
248 val = ioread32(&chip->regs->src_uuid_hi);
249
250 return val;
251}
252EXPORT_SYMBOL(pch_src_uuid_hi_read);
253
254u64 pch_rx_snap_read(struct pci_dev *pdev)
255{
256 struct pch_dev *chip = pci_get_drvdata(pdev);
257 u64 ns;
258 u32 lo, hi;
259
260 lo = ioread32(&chip->regs->rx_snap_lo);
261 hi = ioread32(&chip->regs->rx_snap_hi);
262
263 ns = ((u64) hi) << 32;
264 ns |= lo;
Takahiro Shimizud50566c2012-04-20 18:50:28 +0000265 ns <<= TICKS_NS_SHIFT;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000266
267 return ns;
268}
269EXPORT_SYMBOL(pch_rx_snap_read);
270
271u64 pch_tx_snap_read(struct pci_dev *pdev)
272{
273 struct pch_dev *chip = pci_get_drvdata(pdev);
274 u64 ns;
275 u32 lo, hi;
276
277 lo = ioread32(&chip->regs->tx_snap_lo);
278 hi = ioread32(&chip->regs->tx_snap_hi);
279
280 ns = ((u64) hi) << 32;
281 ns |= lo;
Takahiro Shimizud50566c2012-04-20 18:50:28 +0000282 ns <<= TICKS_NS_SHIFT;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000283
284 return ns;
285}
286EXPORT_SYMBOL(pch_tx_snap_read);
287
288/* This function enables all 64 bits in system time registers [high & low].
289This is a work-around for non continuous value in the SystemTime Register*/
290static void pch_set_system_time_count(struct pch_dev *chip)
291{
292 iowrite32(0x01, &chip->regs->stl_max_set_en);
293 iowrite32(0xFFFFFFFF, &chip->regs->stl_max_set);
294 iowrite32(0x00, &chip->regs->stl_max_set_en);
295}
296
297static void pch_reset(struct pch_dev *chip)
298{
299 /* Reset Hardware Assist */
300 pch_block_reset(chip);
301
302 /* enable all 32 bits in system time registers */
303 pch_set_system_time_count(chip);
304}
305
306/**
307 * pch_set_station_address() - This API sets the station address used by
308 * IEEE 1588 hardware when looking at PTP
309 * traffic on the ethernet interface
310 * @addr: dress which contain the column separated address to be used.
311 */
Takahiro Shimizu17cdedf2012-04-20 18:50:31 +0000312int pch_set_station_address(u8 *addr, struct pci_dev *pdev)
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000313{
314 s32 i;
315 struct pch_dev *chip = pci_get_drvdata(pdev);
316
317 /* Verify the parameter */
Sahara7d3ac5c2013-03-26 19:07:23 +0000318 if ((chip->regs == NULL) || addr == (u8 *)NULL) {
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000319 dev_err(&pdev->dev,
320 "invalid params returning PCH_INVALIDPARAM\n");
321 return PCH_INVALIDPARAM;
322 }
323 /* For all station address bytes */
324 for (i = 0; i < PCH_STATION_BYTES; i++) {
325 u32 val;
326 s32 tmp;
327
328 tmp = hex_to_bin(addr[i * 3]);
329 if (tmp < 0) {
330 dev_err(&pdev->dev,
331 "invalid params returning PCH_INVALIDPARAM\n");
332 return PCH_INVALIDPARAM;
333 }
334 val = tmp * 16;
335 tmp = hex_to_bin(addr[(i * 3) + 1]);
336 if (tmp < 0) {
337 dev_err(&pdev->dev,
338 "invalid params returning PCH_INVALIDPARAM\n");
339 return PCH_INVALIDPARAM;
340 }
341 val += tmp;
342 /* Expects ':' separated addresses */
343 if ((i < 5) && (addr[(i * 3) + 2] != ':')) {
344 dev_err(&pdev->dev,
345 "invalid params returning PCH_INVALIDPARAM\n");
346 return PCH_INVALIDPARAM;
347 }
348
349 /* Ideally we should set the address only after validating
350 entire string */
351 dev_dbg(&pdev->dev, "invoking pch_station_set\n");
352 iowrite32(val, &chip->regs->ts_st[i]);
353 }
354 return 0;
355}
Takahiro Shimizu17cdedf2012-04-20 18:50:31 +0000356EXPORT_SYMBOL(pch_set_station_address);
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000357
358/*
359 * Interrupt service routine
360 */
361static irqreturn_t isr(int irq, void *priv)
362{
363 struct pch_dev *pch_dev = priv;
Sahara7d3ac5c2013-03-26 19:07:23 +0000364 struct pch_ts_regs __iomem *regs = pch_dev->regs;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000365 struct ptp_clock_event event;
366 u32 ack = 0, lo, hi, val;
367
368 val = ioread32(&regs->event);
369
370 if (val & PCH_TSE_SNS) {
371 ack |= PCH_TSE_SNS;
372 if (pch_dev->exts0_enabled) {
373 hi = ioread32(&regs->asms_hi);
374 lo = ioread32(&regs->asms_lo);
375 event.type = PTP_CLOCK_EXTTS;
376 event.index = 0;
377 event.timestamp = ((u64) hi) << 32;
378 event.timestamp |= lo;
379 event.timestamp <<= TICKS_NS_SHIFT;
380 ptp_clock_event(pch_dev->ptp_clock, &event);
381 }
382 }
383
384 if (val & PCH_TSE_SNM) {
385 ack |= PCH_TSE_SNM;
386 if (pch_dev->exts1_enabled) {
387 hi = ioread32(&regs->amms_hi);
388 lo = ioread32(&regs->amms_lo);
389 event.type = PTP_CLOCK_EXTTS;
390 event.index = 1;
391 event.timestamp = ((u64) hi) << 32;
392 event.timestamp |= lo;
393 event.timestamp <<= TICKS_NS_SHIFT;
394 ptp_clock_event(pch_dev->ptp_clock, &event);
395 }
396 }
397
398 if (val & PCH_TSE_TTIPEND)
399 ack |= PCH_TSE_TTIPEND; /* this bit seems to be always set */
400
401 if (ack) {
402 iowrite32(ack, &regs->event);
403 return IRQ_HANDLED;
404 } else
405 return IRQ_NONE;
406}
407
408/*
409 * PTP clock operations
410 */
411
412static int ptp_pch_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
413{
414 u64 adj;
415 u32 diff, addend;
416 int neg_adj = 0;
417 struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
Sahara7d3ac5c2013-03-26 19:07:23 +0000418 struct pch_ts_regs __iomem *regs = pch_dev->regs;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000419
420 if (ppb < 0) {
421 neg_adj = 1;
422 ppb = -ppb;
423 }
424 addend = DEFAULT_ADDEND;
425 adj = addend;
426 adj *= ppb;
427 diff = div_u64(adj, 1000000000ULL);
428
429 addend = neg_adj ? addend - diff : addend + diff;
430
431 iowrite32(addend, &regs->addend);
432
433 return 0;
434}
435
436static int ptp_pch_adjtime(struct ptp_clock_info *ptp, s64 delta)
437{
438 s64 now;
439 unsigned long flags;
440 struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
Sahara7d3ac5c2013-03-26 19:07:23 +0000441 struct pch_ts_regs __iomem *regs = pch_dev->regs;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000442
443 spin_lock_irqsave(&pch_dev->register_lock, flags);
444 now = pch_systime_read(regs);
445 now += delta;
446 pch_systime_write(regs, now);
447 spin_unlock_irqrestore(&pch_dev->register_lock, flags);
448
449 return 0;
450}
451
452static int ptp_pch_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
453{
454 u64 ns;
455 u32 remainder;
456 unsigned long flags;
457 struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
Sahara7d3ac5c2013-03-26 19:07:23 +0000458 struct pch_ts_regs __iomem *regs = pch_dev->regs;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000459
460 spin_lock_irqsave(&pch_dev->register_lock, flags);
461 ns = pch_systime_read(regs);
462 spin_unlock_irqrestore(&pch_dev->register_lock, flags);
463
464 ts->tv_sec = div_u64_rem(ns, 1000000000, &remainder);
465 ts->tv_nsec = remainder;
466 return 0;
467}
468
469static int ptp_pch_settime(struct ptp_clock_info *ptp,
470 const struct timespec *ts)
471{
472 u64 ns;
473 unsigned long flags;
474 struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
Sahara7d3ac5c2013-03-26 19:07:23 +0000475 struct pch_ts_regs __iomem *regs = pch_dev->regs;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000476
477 ns = ts->tv_sec * 1000000000ULL;
478 ns += ts->tv_nsec;
479
480 spin_lock_irqsave(&pch_dev->register_lock, flags);
481 pch_systime_write(regs, ns);
482 spin_unlock_irqrestore(&pch_dev->register_lock, flags);
483
484 return 0;
485}
486
487static int ptp_pch_enable(struct ptp_clock_info *ptp,
488 struct ptp_clock_request *rq, int on)
489{
490 struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
491
492 switch (rq->type) {
493 case PTP_CLK_REQ_EXTTS:
494 switch (rq->extts.index) {
495 case 0:
496 pch_dev->exts0_enabled = on ? 1 : 0;
497 break;
498 case 1:
499 pch_dev->exts1_enabled = on ? 1 : 0;
500 break;
501 default:
502 return -EINVAL;
503 }
504 return 0;
505 default:
506 break;
507 }
508
509 return -EOPNOTSUPP;
510}
511
512static struct ptp_clock_info ptp_pch_caps = {
513 .owner = THIS_MODULE,
514 .name = "PCH timer",
515 .max_adj = 50000000,
516 .n_ext_ts = N_EXT_TS,
Richard Cochran4986b4f02014-03-20 22:21:55 +0100517 .n_pins = 0,
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000518 .pps = 0,
519 .adjfreq = ptp_pch_adjfreq,
520 .adjtime = ptp_pch_adjtime,
521 .gettime = ptp_pch_gettime,
522 .settime = ptp_pch_settime,
523 .enable = ptp_pch_enable,
524};
525
526
527#ifdef CONFIG_PM
528static s32 pch_suspend(struct pci_dev *pdev, pm_message_t state)
529{
530 pci_disable_device(pdev);
531 pci_enable_wake(pdev, PCI_D3hot, 0);
532
533 if (pci_save_state(pdev) != 0) {
534 dev_err(&pdev->dev, "could not save PCI config state\n");
535 return -ENOMEM;
536 }
537 pci_set_power_state(pdev, pci_choose_state(pdev, state));
538
539 return 0;
540}
541
542static s32 pch_resume(struct pci_dev *pdev)
543{
544 s32 ret;
545
546 pci_set_power_state(pdev, PCI_D0);
547 pci_restore_state(pdev);
548 ret = pci_enable_device(pdev);
549 if (ret) {
550 dev_err(&pdev->dev, "pci_enable_device failed\n");
551 return ret;
552 }
553 pci_enable_wake(pdev, PCI_D3hot, 0);
554 return 0;
555}
556#else
557#define pch_suspend NULL
558#define pch_resume NULL
559#endif
560
Bill Pembertonb1f7c8c2012-11-19 13:26:08 -0500561static void pch_remove(struct pci_dev *pdev)
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000562{
563 struct pch_dev *chip = pci_get_drvdata(pdev);
564
565 ptp_clock_unregister(chip->ptp_clock);
566 /* free the interrupt */
567 if (pdev->irq != 0)
568 free_irq(pdev->irq, chip);
569
570 /* unmap the virtual IO memory space */
Sahara7d3ac5c2013-03-26 19:07:23 +0000571 if (chip->regs != NULL) {
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000572 iounmap(chip->regs);
Sahara7d3ac5c2013-03-26 19:07:23 +0000573 chip->regs = NULL;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000574 }
575 /* release the reserved IO memory space */
576 if (chip->mem_base != 0) {
577 release_mem_region(chip->mem_base, chip->mem_size);
578 chip->mem_base = 0;
579 }
580 pci_disable_device(pdev);
581 kfree(chip);
582 dev_info(&pdev->dev, "complete\n");
583}
584
Bill Pemberton5c0a4252012-11-19 13:23:28 -0500585static s32
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000586pch_probe(struct pci_dev *pdev, const struct pci_device_id *id)
587{
588 s32 ret;
589 unsigned long flags;
590 struct pch_dev *chip;
591
592 chip = kzalloc(sizeof(struct pch_dev), GFP_KERNEL);
593 if (chip == NULL)
594 return -ENOMEM;
595
596 /* enable the 1588 pci device */
597 ret = pci_enable_device(pdev);
598 if (ret != 0) {
599 dev_err(&pdev->dev, "could not enable the pci device\n");
600 goto err_pci_en;
601 }
602
603 chip->mem_base = pci_resource_start(pdev, IO_MEM_BAR);
604 if (!chip->mem_base) {
605 dev_err(&pdev->dev, "could not locate IO memory address\n");
606 ret = -ENODEV;
607 goto err_pci_start;
608 }
609
610 /* retrieve the available length of the IO memory space */
611 chip->mem_size = pci_resource_len(pdev, IO_MEM_BAR);
612
613 /* allocate the memory for the device registers */
614 if (!request_mem_region(chip->mem_base, chip->mem_size, "1588_regs")) {
615 dev_err(&pdev->dev,
616 "could not allocate register memory space\n");
617 ret = -EBUSY;
618 goto err_req_mem_region;
619 }
620
621 /* get the virtual address to the 1588 registers */
622 chip->regs = ioremap(chip->mem_base, chip->mem_size);
623
624 if (!chip->regs) {
625 dev_err(&pdev->dev, "Could not get virtual address\n");
626 ret = -ENOMEM;
627 goto err_ioremap;
628 }
629
630 chip->caps = ptp_pch_caps;
Richard Cochran1ef76152012-09-22 07:02:03 +0000631 chip->ptp_clock = ptp_clock_register(&chip->caps, &pdev->dev);
Wei Yongjun0d8c3e72013-05-22 23:59:28 +0000632 if (IS_ERR(chip->ptp_clock)) {
633 ret = PTR_ERR(chip->ptp_clock);
634 goto err_ptp_clock_reg;
635 }
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000636
637 spin_lock_init(&chip->register_lock);
638
639 ret = request_irq(pdev->irq, &isr, IRQF_SHARED, KBUILD_MODNAME, chip);
640 if (ret != 0) {
641 dev_err(&pdev->dev, "failed to get irq %d\n", pdev->irq);
642 goto err_req_irq;
643 }
644
645 /* indicate success */
646 chip->irq = pdev->irq;
647 chip->pdev = pdev;
648 pci_set_drvdata(pdev, chip);
649
650 spin_lock_irqsave(&chip->register_lock, flags);
651 /* reset the ieee1588 h/w */
652 pch_reset(chip);
653
654 iowrite32(DEFAULT_ADDEND, &chip->regs->addend);
655 iowrite32(1, &chip->regs->trgt_lo);
656 iowrite32(0, &chip->regs->trgt_hi);
657 iowrite32(PCH_TSE_TTIPEND, &chip->regs->event);
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000658
659 pch_eth_enable_set(chip);
660
661 if (strcmp(pch_param.station, "00:00:00:00:00:00") != 0) {
662 if (pch_set_station_address(pch_param.station, pdev) != 0) {
663 dev_err(&pdev->dev,
664 "Invalid station address parameter\n"
665 "Module loaded but station address not set correctly\n"
666 );
667 }
668 }
669 spin_unlock_irqrestore(&chip->register_lock, flags);
670 return 0;
671
672err_req_irq:
673 ptp_clock_unregister(chip->ptp_clock);
Wei Yongjun0d8c3e72013-05-22 23:59:28 +0000674err_ptp_clock_reg:
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000675 iounmap(chip->regs);
Sahara7d3ac5c2013-03-26 19:07:23 +0000676 chip->regs = NULL;
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000677
678err_ioremap:
679 release_mem_region(chip->mem_base, chip->mem_size);
680
681err_req_mem_region:
682 chip->mem_base = 0;
683
684err_pci_start:
685 pci_disable_device(pdev);
686
687err_pci_en:
688 kfree(chip);
689 dev_err(&pdev->dev, "probe failed(ret=0x%x)\n", ret);
690
691 return ret;
692}
693
694static DEFINE_PCI_DEVICE_TABLE(pch_ieee1588_pcidev_id) = {
695 {
696 .vendor = PCI_VENDOR_ID_INTEL,
697 .device = PCI_DEVICE_ID_PCH_1588
698 },
699 {0}
700};
701
David S. Millerd8d789492012-03-09 14:47:24 -0800702static struct pci_driver pch_driver = {
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000703 .name = KBUILD_MODNAME,
704 .id_table = pch_ieee1588_pcidev_id,
705 .probe = pch_probe,
706 .remove = pch_remove,
707 .suspend = pch_suspend,
708 .resume = pch_resume,
709};
710
711static void __exit ptp_pch_exit(void)
712{
David S. Millerd8d789492012-03-09 14:47:24 -0800713 pci_unregister_driver(&pch_driver);
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000714}
715
716static s32 __init ptp_pch_init(void)
717{
718 s32 ret;
719
720 /* register the driver with the pci core */
David S. Millerd8d789492012-03-09 14:47:24 -0800721 ret = pci_register_driver(&pch_driver);
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000722
723 return ret;
724}
725
726module_init(ptp_pch_init);
727module_exit(ptp_pch_exit);
728
Sahara7d3ac5c2013-03-26 19:07:23 +0000729module_param_string(station,
730 pch_param.station, sizeof(pch_param.station), 0444);
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000731MODULE_PARM_DESC(station,
Jiri Benc55c31b52013-03-26 03:54:16 +0000732 "IEEE 1588 station address to use - colon separated hex values");
Takahiro Shimizu863d08e2012-03-07 22:16:26 +0000733
734MODULE_AUTHOR("LAPIS SEMICONDUCTOR, <tshimizu818@gmail.com>");
735MODULE_DESCRIPTION("PTP clock using the EG20T timer");
736MODULE_LICENSE("GPL");