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Get rid of 'remove_new' relic from platform driver struct
[linux.git] / drivers / ptp / ptp_ines.c
blob68f1f7fdaa9deb02c640880702ef5395bc0eebb3
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (C) 2018 MOSER-BAER AG
4 //
5
6 #define pr_fmt(fmt) "InES_PTP: " fmt
7
8 #include <linux/ethtool.h>
9 #include <linux/export.h>
10 #include <linux/if_vlan.h>
11 #include <linux/mii_timestamper.h>
12 #include <linux/module.h>
13 #include <linux/net_tstamp.h>
14 #include <linux/of.h>
15 #include <linux/of_address.h>
16 #include <linux/of_irq.h>
17 #include <linux/phy.h>
18 #include <linux/platform_device.h>
19 #include <linux/ptp_classify.h>
20 #include <linux/ptp_clock_kernel.h>
21 #include <linux/stddef.h>
22
23 MODULE_DESCRIPTION("Driver for the ZHAW InES PTP time stamping IP core");
24 MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
25 MODULE_VERSION("1.0");
26 MODULE_LICENSE("GPL");
27
28 /* GLOBAL register */
29 #define MCAST_MAC_SELECT_SHIFT 2
30 #define MCAST_MAC_SELECT_MASK 0x3
31 #define IO_RESET BIT(1)
32 #define PTP_RESET BIT(0)
33
34 /* VERSION register */
35 #define IF_MAJOR_VER_SHIFT 12
36 #define IF_MAJOR_VER_MASK 0xf
37 #define IF_MINOR_VER_SHIFT 8
38 #define IF_MINOR_VER_MASK 0xf
39 #define FPGA_MAJOR_VER_SHIFT 4
40 #define FPGA_MAJOR_VER_MASK 0xf
41 #define FPGA_MINOR_VER_SHIFT 0
42 #define FPGA_MINOR_VER_MASK 0xf
43
44 /* INT_STAT register */
45 #define RX_INTR_STATUS_3 BIT(5)
46 #define RX_INTR_STATUS_2 BIT(4)
47 #define RX_INTR_STATUS_1 BIT(3)
48 #define TX_INTR_STATUS_3 BIT(2)
49 #define TX_INTR_STATUS_2 BIT(1)
50 #define TX_INTR_STATUS_1 BIT(0)
51
52 /* INT_MSK register */
53 #define RX_INTR_MASK_3 BIT(5)
54 #define RX_INTR_MASK_2 BIT(4)
55 #define RX_INTR_MASK_1 BIT(3)
56 #define TX_INTR_MASK_3 BIT(2)
57 #define TX_INTR_MASK_2 BIT(1)
58 #define TX_INTR_MASK_1 BIT(0)
59
60 /* BUF_STAT register */
61 #define RX_FIFO_NE_3 BIT(5)
62 #define RX_FIFO_NE_2 BIT(4)
63 #define RX_FIFO_NE_1 BIT(3)
64 #define TX_FIFO_NE_3 BIT(2)
65 #define TX_FIFO_NE_2 BIT(1)
66 #define TX_FIFO_NE_1 BIT(0)
67
68 /* PORT_CONF register */
69 #define CM_ONE_STEP BIT(6)
70 #define PHY_SPEED_SHIFT 4
71 #define PHY_SPEED_MASK 0x3
72 #define P2P_DELAY_WR_POS_SHIFT 2
73 #define P2P_DELAY_WR_POS_MASK 0x3
74 #define PTP_MODE_SHIFT 0
75 #define PTP_MODE_MASK 0x3
76
77 /* TS_STAT_TX register */
78 #define TS_ENABLE BIT(15)
79 #define DATA_READ_POS_SHIFT 8
80 #define DATA_READ_POS_MASK 0x1f
81 #define DISCARDED_EVENTS_SHIFT 4
82 #define DISCARDED_EVENTS_MASK 0xf
83
84 #define INES_N_PORTS 3
85 #define INES_REGISTER_SIZE 0x80
86 #define INES_PORT_OFFSET 0x20
87 #define INES_PORT_SIZE 0x20
88 #define INES_FIFO_DEPTH 90
89 #define INES_MAX_EVENTS 100
90
91 #define BC_PTP_V1 0
92 #define BC_PTP_V2 1
93 #define TC_E2E_PTP_V2 2
94 #define TC_P2P_PTP_V2 3
95
96 #define PHY_SPEED_10 0
97 #define PHY_SPEED_100 1
98 #define PHY_SPEED_1000 2
99
100 #define PORT_CONF \
101 ((PHY_SPEED_1000 << PHY_SPEED_SHIFT) | (BC_PTP_V2 << PTP_MODE_SHIFT))
102
103 #define ines_read32(s, r) __raw_readl((void __iomem *)&s->regs->r)
104 #define ines_write32(s, v, r) __raw_writel(v, (void __iomem *)&s->regs->r)
105
106 #define MESSAGE_TYPE_SYNC 1
107 #define MESSAGE_TYPE_P_DELAY_REQ 2
108 #define MESSAGE_TYPE_P_DELAY_RESP 3
109 #define MESSAGE_TYPE_DELAY_REQ 4
110
111 static LIST_HEAD(ines_clocks);
112 static DEFINE_MUTEX(ines_clocks_lock);
113
114 struct ines_global_regs {
115 u32 id;
116 u32 test;
117 u32 global;
118 u32 version;
119 u32 test2;
120 u32 int_stat;
121 u32 int_msk;
122 u32 buf_stat;
123 };
124
125 struct ines_port_registers {
126 u32 port_conf;
127 u32 p_delay;
128 u32 ts_stat_tx;
129 u32 ts_stat_rx;
130 u32 ts_tx;
131 u32 ts_rx;
132 };
133
134 struct ines_timestamp {
135 struct list_head list;
136 unsigned long tmo;
137 u16 tag;
138 u64 sec;
139 u64 nsec;
140 u64 clkid;
141 u16 portnum;
142 u16 seqid;
143 };
144
145 struct ines_port {
146 struct ines_port_registers *regs;
147 struct mii_timestamper mii_ts;
148 struct ines_clock *clock;
149 bool rxts_enabled;
150 bool txts_enabled;
151 unsigned int index;
152 struct delayed_work ts_work;
153 /* lock protects event list and tx_skb */
154 spinlock_t lock;
155 struct sk_buff *tx_skb;
156 struct list_head events;
157 struct list_head pool;
158 struct ines_timestamp pool_data[INES_MAX_EVENTS];
159 };
160
161 struct ines_clock {
162 struct ines_port port[INES_N_PORTS];
163 struct ines_global_regs __iomem *regs;
164 void __iomem *base;
165 struct device_node *node;
166 struct device *dev;
167 struct list_head list;
168 };
169
170 static bool ines_match(struct sk_buff *skb, unsigned int ptp_class,
171 struct ines_timestamp *ts, struct device *dev);
172 static int ines_rxfifo_read(struct ines_port *port);
173 static u64 ines_rxts64(struct ines_port *port, unsigned int words);
174 static bool ines_timestamp_expired(struct ines_timestamp *ts);
175 static u64 ines_txts64(struct ines_port *port, unsigned int words);
176 static void ines_txtstamp_work(struct work_struct *work);
177 static bool is_sync_pdelay_resp(struct sk_buff *skb, int type);
178 static u8 tag_to_msgtype(u8 tag);
179
180 static void ines_clock_cleanup(struct ines_clock *clock)
181 {
182 struct ines_port *port;
183 int i;
184
185 for (i = 0; i < INES_N_PORTS; i++) {
186 port = &clock->port[i];
187 cancel_delayed_work_sync(&port->ts_work);
188 }
189 }
190
191 static int ines_clock_init(struct ines_clock *clock, struct device *device,
192 void __iomem *addr)
193 {
194 struct device_node *node = device->of_node;
195 unsigned long port_addr;
196 struct ines_port *port;
197 int i, j;
198
199 INIT_LIST_HEAD(&clock->list);
200 clock->node = node;
201 clock->dev = device;
202 clock->base = addr;
203 clock->regs = clock->base;
204
205 for (i = 0; i < INES_N_PORTS; i++) {
206 port = &clock->port[i];
207 port_addr = (unsigned long) clock->base +
208 INES_PORT_OFFSET + i * INES_PORT_SIZE;
209 port->regs = (struct ines_port_registers *) port_addr;
210 port->clock = clock;
211 port->index = i;
212 INIT_DELAYED_WORK(&port->ts_work, ines_txtstamp_work);
213 spin_lock_init(&port->lock);
214 INIT_LIST_HEAD(&port->events);
215 INIT_LIST_HEAD(&port->pool);
216 for (j = 0; j < INES_MAX_EVENTS; j++)
217 list_add(&port->pool_data[j].list, &port->pool);
218 }
219
220 ines_write32(clock, 0xBEEF, test);
221 ines_write32(clock, 0xBEEF, test2);
222
223 dev_dbg(device, "ID 0x%x\n", ines_read32(clock, id));
224 dev_dbg(device, "TEST 0x%x\n", ines_read32(clock, test));
225 dev_dbg(device, "VERSION 0x%x\n", ines_read32(clock, version));
226 dev_dbg(device, "TEST2 0x%x\n", ines_read32(clock, test2));
227
228 for (i = 0; i < INES_N_PORTS; i++) {
229 port = &clock->port[i];
230 ines_write32(port, PORT_CONF, port_conf);
231 }
232
233 return 0;
234 }
235
236 static struct ines_port *ines_find_port(struct device_node *node, u32 index)
237 {
238 struct ines_port *port = NULL;
239 struct ines_clock *clock;
240 struct list_head *this;
241
242 mutex_lock(&ines_clocks_lock);
243 list_for_each(this, &ines_clocks) {
244 clock = list_entry(this, struct ines_clock, list);
245 if (clock->node == node) {
246 port = &clock->port[index];
247 break;
248 }
249 }
250 mutex_unlock(&ines_clocks_lock);
251 return port;
252 }
253
254 static u64 ines_find_rxts(struct ines_port *port, struct sk_buff *skb, int type)
255 {
256 struct list_head *this, *next;
257 struct ines_timestamp *ts;
258 unsigned long flags;
259 u64 ns = 0;
260
261 if (type == PTP_CLASS_NONE)
262 return 0;
263
264 spin_lock_irqsave(&port->lock, flags);
265 ines_rxfifo_read(port);
266 list_for_each_safe(this, next, &port->events) {
267 ts = list_entry(this, struct ines_timestamp, list);
268 if (ines_timestamp_expired(ts)) {
269 list_del_init(&ts->list);
270 list_add(&ts->list, &port->pool);
271 continue;
272 }
273 if (ines_match(skb, type, ts, port->clock->dev)) {
274 ns = ts->sec * 1000000000ULL + ts->nsec;
275 list_del_init(&ts->list);
276 list_add(&ts->list, &port->pool);
277 break;
278 }
279 }
280 spin_unlock_irqrestore(&port->lock, flags);
281
282 return ns;
283 }
284
285 static u64 ines_find_txts(struct ines_port *port, struct sk_buff *skb)
286 {
287 unsigned int class = ptp_classify_raw(skb), i;
288 u32 data_rd_pos, buf_stat, mask, ts_stat_tx;
289 struct ines_timestamp ts;
290 unsigned long flags;
291 u64 ns = 0;
292
293 mask = TX_FIFO_NE_1 << port->index;
294
295 spin_lock_irqsave(&port->lock, flags);
296
297 for (i = 0; i < INES_FIFO_DEPTH; i++) {
298
299 buf_stat = ines_read32(port->clock, buf_stat);
300 if (!(buf_stat & mask)) {
301 dev_dbg(port->clock->dev,
302 "Tx timestamp FIFO unexpectedly empty\n");
303 break;
304 }
305 ts_stat_tx = ines_read32(port, ts_stat_tx);
306 data_rd_pos = (ts_stat_tx >> DATA_READ_POS_SHIFT) &
307 DATA_READ_POS_MASK;
308 if (data_rd_pos) {
309 dev_err(port->clock->dev,
310 "unexpected Tx read pos %u\n", data_rd_pos);
311 break;
312 }
313
314 ts.tag = ines_read32(port, ts_tx);
315 ts.sec = ines_txts64(port, 3);
316 ts.nsec = ines_txts64(port, 2);
317 ts.clkid = ines_txts64(port, 4);
318 ts.portnum = ines_read32(port, ts_tx);
319 ts.seqid = ines_read32(port, ts_tx);
320
321 if (ines_match(skb, class, &ts, port->clock->dev)) {
322 ns = ts.sec * 1000000000ULL + ts.nsec;
323 break;
324 }
325 }
326
327 spin_unlock_irqrestore(&port->lock, flags);
328 return ns;
329 }
330
331 static int ines_hwtstamp(struct mii_timestamper *mii_ts,
332 struct kernel_hwtstamp_config *cfg,
333 struct netlink_ext_ack *extack)
334 {
335 struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
336 u32 cm_one_step = 0, port_conf, ts_stat_rx, ts_stat_tx;
337 unsigned long flags;
338
339 switch (cfg->tx_type) {
340 case HWTSTAMP_TX_OFF:
341 ts_stat_tx = 0;
342 break;
343 case HWTSTAMP_TX_ON:
344 ts_stat_tx = TS_ENABLE;
345 break;
346 case HWTSTAMP_TX_ONESTEP_P2P:
347 ts_stat_tx = TS_ENABLE;
348 cm_one_step = CM_ONE_STEP;
349 break;
350 default:
351 return -ERANGE;
352 }
353
354 switch (cfg->rx_filter) {
355 case HWTSTAMP_FILTER_NONE:
356 ts_stat_rx = 0;
357 break;
358 case HWTSTAMP_FILTER_ALL:
359 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
360 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
361 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
362 return -ERANGE;
363 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
364 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
365 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
366 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
367 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
368 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
369 case HWTSTAMP_FILTER_PTP_V2_EVENT:
370 case HWTSTAMP_FILTER_PTP_V2_SYNC:
371 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
372 ts_stat_rx = TS_ENABLE;
373 cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
374 break;
375 default:
376 return -ERANGE;
377 }
378
379 spin_lock_irqsave(&port->lock, flags);
380
381 port_conf = ines_read32(port, port_conf);
382 port_conf &= ~CM_ONE_STEP;
383 port_conf |= cm_one_step;
384
385 ines_write32(port, port_conf, port_conf);
386 ines_write32(port, ts_stat_rx, ts_stat_rx);
387 ines_write32(port, ts_stat_tx, ts_stat_tx);
388
389 port->rxts_enabled = ts_stat_rx == TS_ENABLE;
390 port->txts_enabled = ts_stat_tx == TS_ENABLE;
391
392 spin_unlock_irqrestore(&port->lock, flags);
393
394 return 0;
395 }
396
397 static void ines_link_state(struct mii_timestamper *mii_ts,
398 struct phy_device *phydev)
399 {
400 struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
401 u32 port_conf, speed_conf;
402 unsigned long flags;
403
404 switch (phydev->speed) {
405 case SPEED_10:
406 speed_conf = PHY_SPEED_10 << PHY_SPEED_SHIFT;
407 break;
408 case SPEED_100:
409 speed_conf = PHY_SPEED_100 << PHY_SPEED_SHIFT;
410 break;
411 case SPEED_1000:
412 speed_conf = PHY_SPEED_1000 << PHY_SPEED_SHIFT;
413 break;
414 default:
415 dev_err(port->clock->dev, "bad speed: %d\n", phydev->speed);
416 return;
417 }
418 spin_lock_irqsave(&port->lock, flags);
419
420 port_conf = ines_read32(port, port_conf);
421 port_conf &= ~(0x3 << PHY_SPEED_SHIFT);
422 port_conf |= speed_conf;
423
424 ines_write32(port, port_conf, port_conf);
425
426 spin_unlock_irqrestore(&port->lock, flags);
427 }
428
429 static bool ines_match(struct sk_buff *skb, unsigned int ptp_class,
430 struct ines_timestamp *ts, struct device *dev)
431 {
432 struct ptp_header *hdr;
433 u16 portn, seqid;
434 u8 msgtype;
435 u64 clkid;
436
437 if (unlikely(ptp_class & PTP_CLASS_V1))
438 return false;
439
440 hdr = ptp_parse_header(skb, ptp_class);
441 if (!hdr)
442 return false;
443
444 msgtype = ptp_get_msgtype(hdr, ptp_class);
445 clkid = be64_to_cpup((__be64 *)&hdr->source_port_identity.clock_identity.id[0]);
446 portn = be16_to_cpu(hdr->source_port_identity.port_number);
447 seqid = be16_to_cpu(hdr->sequence_id);
448
449 if (tag_to_msgtype(ts->tag & 0x7) != msgtype) {
450 dev_dbg(dev, "msgtype mismatch ts %hhu != skb %hhu\n",
451 tag_to_msgtype(ts->tag & 0x7), msgtype);
452 return false;
453 }
454 if (ts->clkid != clkid) {
455 dev_dbg(dev, "clkid mismatch ts %llx != skb %llx\n",
456 ts->clkid, clkid);
457 return false;
458 }
459 if (ts->portnum != portn) {
460 dev_dbg(dev, "portn mismatch ts %hu != skb %hu\n",
461 ts->portnum, portn);
462 return false;
463 }
464 if (ts->seqid != seqid) {
465 dev_dbg(dev, "seqid mismatch ts %hu != skb %hu\n",
466 ts->seqid, seqid);
467 return false;
468 }
469
470 return true;
471 }
472
473 static bool ines_rxtstamp(struct mii_timestamper *mii_ts,
474 struct sk_buff *skb, int type)
475 {
476 struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
477 struct skb_shared_hwtstamps *ssh;
478 u64 ns;
479
480 if (!port->rxts_enabled)
481 return false;
482
483 ns = ines_find_rxts(port, skb, type);
484 if (!ns)
485 return false;
486
487 ssh = skb_hwtstamps(skb);
488 ssh->hwtstamp = ns_to_ktime(ns);
489 netif_rx(skb);
490
491 return true;
492 }
493
494 static int ines_rxfifo_read(struct ines_port *port)
495 {
496 u32 data_rd_pos, buf_stat, mask, ts_stat_rx;
497 struct ines_timestamp *ts;
498 unsigned int i;
499
500 mask = RX_FIFO_NE_1 << port->index;
501
502 for (i = 0; i < INES_FIFO_DEPTH; i++) {
503 if (list_empty(&port->pool)) {
504 dev_err(port->clock->dev, "event pool is empty\n");
505 return -1;
506 }
507 buf_stat = ines_read32(port->clock, buf_stat);
508 if (!(buf_stat & mask))
509 break;
510
511 ts_stat_rx = ines_read32(port, ts_stat_rx);
512 data_rd_pos = (ts_stat_rx >> DATA_READ_POS_SHIFT) &
513 DATA_READ_POS_MASK;
514 if (data_rd_pos) {
515 dev_err(port->clock->dev, "unexpected Rx read pos %u\n",
516 data_rd_pos);
517 break;
518 }
519
520 ts = list_first_entry(&port->pool, struct ines_timestamp, list);
521 ts->tmo = jiffies + HZ;
522 ts->tag = ines_read32(port, ts_rx);
523 ts->sec = ines_rxts64(port, 3);
524 ts->nsec = ines_rxts64(port, 2);
525 ts->clkid = ines_rxts64(port, 4);
526 ts->portnum = ines_read32(port, ts_rx);
527 ts->seqid = ines_read32(port, ts_rx);
528
529 list_del_init(&ts->list);
530 list_add_tail(&ts->list, &port->events);
531 }
532
533 return 0;
534 }
535
536 static u64 ines_rxts64(struct ines_port *port, unsigned int words)
537 {
538 unsigned int i;
539 u64 result;
540 u16 word;
541
542 word = ines_read32(port, ts_rx);
543 result = word;
544 words--;
545 for (i = 0; i < words; i++) {
546 word = ines_read32(port, ts_rx);
547 result <<= 16;
548 result |= word;
549 }
550 return result;
551 }
552
553 static bool ines_timestamp_expired(struct ines_timestamp *ts)
554 {
555 return time_after(jiffies, ts->tmo);
556 }
557
558 static int ines_ts_info(struct mii_timestamper *mii_ts,
559 struct kernel_ethtool_ts_info *info)
560 {
561 info->so_timestamping =
562 SOF_TIMESTAMPING_TX_HARDWARE |
563 SOF_TIMESTAMPING_TX_SOFTWARE |
564 SOF_TIMESTAMPING_RX_HARDWARE |
565 SOF_TIMESTAMPING_RAW_HARDWARE;
566
567 info->tx_types =
568 (1 << HWTSTAMP_TX_OFF) |
569 (1 << HWTSTAMP_TX_ON) |
570 (1 << HWTSTAMP_TX_ONESTEP_P2P);
571
572 info->rx_filters =
573 (1 << HWTSTAMP_FILTER_NONE) |
574 (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
575
576 return 0;
577 }
578
579 static u64 ines_txts64(struct ines_port *port, unsigned int words)
580 {
581 unsigned int i;
582 u64 result;
583 u16 word;
584
585 word = ines_read32(port, ts_tx);
586 result = word;
587 words--;
588 for (i = 0; i < words; i++) {
589 word = ines_read32(port, ts_tx);
590 result <<= 16;
591 result |= word;
592 }
593 return result;
594 }
595
596 static bool ines_txts_onestep(struct ines_port *port, struct sk_buff *skb, int type)
597 {
598 unsigned long flags;
599 u32 port_conf;
600
601 spin_lock_irqsave(&port->lock, flags);
602 port_conf = ines_read32(port, port_conf);
603 spin_unlock_irqrestore(&port->lock, flags);
604
605 if (port_conf & CM_ONE_STEP)
606 return is_sync_pdelay_resp(skb, type);
607
608 return false;
609 }
610
611 static void ines_txtstamp(struct mii_timestamper *mii_ts,
612 struct sk_buff *skb, int type)
613 {
614 struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
615 struct sk_buff *old_skb = NULL;
616 unsigned long flags;
617
618 if (!port->txts_enabled || ines_txts_onestep(port, skb, type)) {
619 kfree_skb(skb);
620 return;
621 }
622
623 spin_lock_irqsave(&port->lock, flags);
624
625 if (port->tx_skb)
626 old_skb = port->tx_skb;
627
628 port->tx_skb = skb;
629
630 spin_unlock_irqrestore(&port->lock, flags);
631
632 kfree_skb(old_skb);
633
634 schedule_delayed_work(&port->ts_work, 1);
635 }
636
637 static void ines_txtstamp_work(struct work_struct *work)
638 {
639 struct ines_port *port =
640 container_of(work, struct ines_port, ts_work.work);
641 struct skb_shared_hwtstamps ssh;
642 struct sk_buff *skb;
643 unsigned long flags;
644 u64 ns;
645
646 spin_lock_irqsave(&port->lock, flags);
647 skb = port->tx_skb;
648 port->tx_skb = NULL;
649 spin_unlock_irqrestore(&port->lock, flags);
650
651 ns = ines_find_txts(port, skb);
652 if (!ns) {
653 kfree_skb(skb);
654 return;
655 }
656 ssh.hwtstamp = ns_to_ktime(ns);
657 skb_complete_tx_timestamp(skb, &ssh);
658 }
659
660 static bool is_sync_pdelay_resp(struct sk_buff *skb, int type)
661 {
662 struct ptp_header *hdr;
663 u8 msgtype;
664
665 hdr = ptp_parse_header(skb, type);
666 if (!hdr)
667 return false;
668
669 msgtype = ptp_get_msgtype(hdr, type);
670
671 switch (msgtype) {
672 case PTP_MSGTYPE_SYNC:
673 case PTP_MSGTYPE_PDELAY_RESP:
674 return true;
675 default:
676 return false;
677 }
678 }
679
680 static u8 tag_to_msgtype(u8 tag)
681 {
682 switch (tag) {
683 case MESSAGE_TYPE_SYNC:
684 return PTP_MSGTYPE_SYNC;
685 case MESSAGE_TYPE_P_DELAY_REQ:
686 return PTP_MSGTYPE_PDELAY_REQ;
687 case MESSAGE_TYPE_P_DELAY_RESP:
688 return PTP_MSGTYPE_PDELAY_RESP;
689 case MESSAGE_TYPE_DELAY_REQ:
690 return PTP_MSGTYPE_DELAY_REQ;
691 }
692 return 0xf;
693 }
694
695 static struct mii_timestamper *ines_ptp_probe_channel(struct device *device,
696 unsigned int index)
697 {
698 struct device_node *node = device->of_node;
699 struct ines_port *port;
700
701 if (index > INES_N_PORTS - 1) {
702 dev_err(device, "bad port index %u\n", index);
703 return ERR_PTR(-EINVAL);
704 }
705 port = ines_find_port(node, index);
706 if (!port) {
707 dev_err(device, "missing port index %u\n", index);
708 return ERR_PTR(-ENODEV);
709 }
710 port->mii_ts.rxtstamp = ines_rxtstamp;
711 port->mii_ts.txtstamp = ines_txtstamp;
712 port->mii_ts.hwtstamp = ines_hwtstamp;
713 port->mii_ts.link_state = ines_link_state;
714 port->mii_ts.ts_info = ines_ts_info;
715
716 return &port->mii_ts;
717 }
718
719 static void ines_ptp_release_channel(struct device *device,
720 struct mii_timestamper *mii_ts)
721 {
722 }
723
724 static struct mii_timestamping_ctrl ines_ctrl = {
725 .probe_channel = ines_ptp_probe_channel,
726 .release_channel = ines_ptp_release_channel,
727 };
728
729 static int ines_ptp_ctrl_probe(struct platform_device *pld)
730 {
731 struct ines_clock *clock;
732 void __iomem *addr;
733 int err = 0;
734
735 addr = devm_platform_ioremap_resource(pld, 0);
736 if (IS_ERR(addr)) {
737 err = PTR_ERR(addr);
738 goto out;
739 }
740 clock = kzalloc(sizeof(*clock), GFP_KERNEL);
741 if (!clock) {
742 err = -ENOMEM;
743 goto out;
744 }
745 if (ines_clock_init(clock, &pld->dev, addr)) {
746 kfree(clock);
747 err = -ENOMEM;
748 goto out;
749 }
750 err = register_mii_tstamp_controller(&pld->dev, &ines_ctrl);
751 if (err) {
752 kfree(clock);
753 goto out;
754 }
755 mutex_lock(&ines_clocks_lock);
756 list_add_tail(&ines_clocks, &clock->list);
757 mutex_unlock(&ines_clocks_lock);
758
759 dev_set_drvdata(&pld->dev, clock);
760 out:
761 return err;
762 }
763
764 static void ines_ptp_ctrl_remove(struct platform_device *pld)
765 {
766 struct ines_clock *clock = dev_get_drvdata(&pld->dev);
767
768 unregister_mii_tstamp_controller(&pld->dev);
769 mutex_lock(&ines_clocks_lock);
770 list_del(&clock->list);
771 mutex_unlock(&ines_clocks_lock);
772 ines_clock_cleanup(clock);
773 kfree(clock);
774 }
775
776 static const struct of_device_id ines_ptp_ctrl_of_match[] = {
777 { .compatible = "ines,ptp-ctrl" },
778 { }
779 };
780
781 MODULE_DEVICE_TABLE(of, ines_ptp_ctrl_of_match);
782
783 static struct platform_driver ines_ptp_ctrl_driver = {
784 .probe = ines_ptp_ctrl_probe,
785 .remove = ines_ptp_ctrl_remove,
786 .driver = {
787 .name = "ines_ptp_ctrl",
788 .of_match_table = ines_ptp_ctrl_of_match,
789 },
790 };
791 module_platform_driver(ines_ptp_ctrl_driver);
Linux Kernel