1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Marvell 88E6xxx Switch Global 2 Registers support
4  *
5  * Copyright (c) 2008 Marvell Semiconductor
6  *
7  * Copyright (c) 2016-2017 Savoir-faire Linux Inc.
8  *	Vivien Didelot <vivien.didelot@savoirfairelinux.com>
9  */
10 
11 #include <linux/bitfield.h>
12 #include <linux/interrupt.h>
13 #include <linux/irqdomain.h>
14 
15 #include "chip.h"
16 #include "global1.h" /* for MV88E6XXX_G1_STS_IRQ_DEVICE */
17 #include "global2.h"
18 
19 int mv88e6xxx_g2_read(struct mv88e6xxx_chip *chip, int reg, u16 *val)
20 {
21 	return mv88e6xxx_read(chip, chip->info->global2_addr, reg, val);
22 }
23 
24 int mv88e6xxx_g2_write(struct mv88e6xxx_chip *chip, int reg, u16 val)
25 {
26 	return mv88e6xxx_write(chip, chip->info->global2_addr, reg, val);
27 }
28 
29 int mv88e6xxx_g2_wait_bit(struct mv88e6xxx_chip *chip, int reg, int
30 			  bit, int val)
31 {
32 	return mv88e6xxx_wait_bit(chip, chip->info->global2_addr, reg,
33 				  bit, val);
34 }
35 
36 /* Offset 0x00: Interrupt Source Register */
37 
38 static int mv88e6xxx_g2_int_source(struct mv88e6xxx_chip *chip, u16 *src)
39 {
40 	/* Read (and clear most of) the Interrupt Source bits */
41 	return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_INT_SRC, src);
42 }
43 
44 /* Offset 0x01: Interrupt Mask Register */
45 
46 static int mv88e6xxx_g2_int_mask(struct mv88e6xxx_chip *chip, u16 mask)
47 {
48 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_INT_MASK, mask);
49 }
50 
51 /* Offset 0x02: Management Enable 2x */
52 
53 static int mv88e6xxx_g2_mgmt_enable_2x(struct mv88e6xxx_chip *chip, u16 en2x)
54 {
55 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_MGMT_EN_2X, en2x);
56 }
57 
58 /* Offset 0x03: Management Enable 0x */
59 
60 static int mv88e6xxx_g2_mgmt_enable_0x(struct mv88e6xxx_chip *chip, u16 en0x)
61 {
62 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_MGMT_EN_0X, en0x);
63 }
64 
65 /* Offset 0x05: Switch Management Register */
66 
67 static int mv88e6xxx_g2_switch_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip,
68 					     bool enable)
69 {
70 	u16 val;
71 	int err;
72 
73 	err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_SWITCH_MGMT, &val);
74 	if (err)
75 		return err;
76 
77 	if (enable)
78 		val |= MV88E6XXX_G2_SWITCH_MGMT_RSVD2CPU;
79 	else
80 		val &= ~MV88E6XXX_G2_SWITCH_MGMT_RSVD2CPU;
81 
82 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SWITCH_MGMT, val);
83 }
84 
85 int mv88e6185_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip)
86 {
87 	int err;
88 
89 	/* Consider the frames with reserved multicast destination
90 	 * addresses matching 01:80:c2:00:00:0x as MGMT.
91 	 */
92 	err = mv88e6xxx_g2_mgmt_enable_0x(chip, 0xffff);
93 	if (err)
94 		return err;
95 
96 	return mv88e6xxx_g2_switch_mgmt_rsvd2cpu(chip, true);
97 }
98 
99 int mv88e6352_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip)
100 {
101 	int err;
102 
103 	/* Consider the frames with reserved multicast destination
104 	 * addresses matching 01:80:c2:00:00:2x as MGMT.
105 	 */
106 	err = mv88e6xxx_g2_mgmt_enable_2x(chip, 0xffff);
107 	if (err)
108 		return err;
109 
110 	return mv88e6185_g2_mgmt_rsvd2cpu(chip);
111 }
112 
113 /* Offset 0x06: Device Mapping Table register */
114 
115 int mv88e6xxx_g2_device_mapping_write(struct mv88e6xxx_chip *chip, int target,
116 				      int port)
117 {
118 	u16 val = (target << 8) | (port & 0x1f);
119 	/* Modern chips use 5 bits to define a device mapping port,
120 	 * but bit 4 is reserved on older chips, so it is safe to use.
121 	 */
122 
123 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_DEVICE_MAPPING,
124 				  MV88E6XXX_G2_DEVICE_MAPPING_UPDATE | val);
125 }
126 
127 /* Offset 0x07: Trunk Mask Table register */
128 
129 int mv88e6xxx_g2_trunk_mask_write(struct mv88e6xxx_chip *chip, int num,
130 				  bool hash, u16 mask)
131 {
132 	u16 val = (num << 12) | (mask & mv88e6xxx_port_mask(chip));
133 
134 	if (hash)
135 		val |= MV88E6XXX_G2_TRUNK_MASK_HASH;
136 
137 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_TRUNK_MASK,
138 				  MV88E6XXX_G2_TRUNK_MASK_UPDATE | val);
139 }
140 
141 /* Offset 0x08: Trunk Mapping Table register */
142 
143 int mv88e6xxx_g2_trunk_mapping_write(struct mv88e6xxx_chip *chip, int id,
144 				     u16 map)
145 {
146 	const u16 port_mask = BIT(mv88e6xxx_num_ports(chip)) - 1;
147 	u16 val = (id << 11) | (map & port_mask);
148 
149 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_TRUNK_MAPPING,
150 				  MV88E6XXX_G2_TRUNK_MAPPING_UPDATE | val);
151 }
152 
153 int mv88e6xxx_g2_trunk_clear(struct mv88e6xxx_chip *chip)
154 {
155 	const u16 port_mask = BIT(mv88e6xxx_num_ports(chip)) - 1;
156 	int i, err;
157 
158 	/* Clear all eight possible Trunk Mask vectors */
159 	for (i = 0; i < 8; ++i) {
160 		err = mv88e6xxx_g2_trunk_mask_write(chip, i, false, port_mask);
161 		if (err)
162 			return err;
163 	}
164 
165 	/* Clear all sixteen possible Trunk ID routing vectors */
166 	for (i = 0; i < 16; ++i) {
167 		err = mv88e6xxx_g2_trunk_mapping_write(chip, i, 0);
168 		if (err)
169 			return err;
170 	}
171 
172 	return 0;
173 }
174 
175 /* Offset 0x09: Ingress Rate Command register
176  * Offset 0x0A: Ingress Rate Data register
177  */
178 
179 static int mv88e6xxx_g2_irl_wait(struct mv88e6xxx_chip *chip)
180 {
181 	int bit = __bf_shf(MV88E6XXX_G2_IRL_CMD_BUSY);
182 
183 	return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_IRL_CMD, bit, 0);
184 }
185 
186 static int mv88e6xxx_g2_irl_op(struct mv88e6xxx_chip *chip, u16 op, int port,
187 			       int res, int reg)
188 {
189 	int err;
190 
191 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_IRL_CMD,
192 				 MV88E6XXX_G2_IRL_CMD_BUSY | op | (port << 8) |
193 				 (res << 5) | reg);
194 	if (err)
195 		return err;
196 
197 	return mv88e6xxx_g2_irl_wait(chip);
198 }
199 
200 int mv88e6352_g2_irl_init_all(struct mv88e6xxx_chip *chip, int port)
201 {
202 	return mv88e6xxx_g2_irl_op(chip, MV88E6352_G2_IRL_CMD_OP_INIT_ALL, port,
203 				   0, 0);
204 }
205 
206 int mv88e6390_g2_irl_init_all(struct mv88e6xxx_chip *chip, int port)
207 {
208 	return mv88e6xxx_g2_irl_op(chip, MV88E6390_G2_IRL_CMD_OP_INIT_ALL, port,
209 				   0, 0);
210 }
211 
212 /* Offset 0x0B: Cross-chip Port VLAN (Addr) Register
213  * Offset 0x0C: Cross-chip Port VLAN Data Register
214  */
215 
216 static int mv88e6xxx_g2_pvt_op_wait(struct mv88e6xxx_chip *chip)
217 {
218 	int bit = __bf_shf(MV88E6XXX_G2_PVT_ADDR_BUSY);
219 
220 	return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_PVT_ADDR, bit, 0);
221 }
222 
223 static int mv88e6xxx_g2_pvt_op(struct mv88e6xxx_chip *chip, int src_dev,
224 			       int src_port, u16 op)
225 {
226 	int err;
227 
228 	/* 9-bit Cross-chip PVT pointer: with MV88E6XXX_G2_MISC_5_BIT_PORT
229 	 * cleared, source device is 5-bit, source port is 4-bit.
230 	 */
231 	op |= MV88E6XXX_G2_PVT_ADDR_BUSY;
232 	op |= (src_dev & 0x1f) << 4;
233 	op |= (src_port & 0xf);
234 
235 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_PVT_ADDR, op);
236 	if (err)
237 		return err;
238 
239 	return mv88e6xxx_g2_pvt_op_wait(chip);
240 }
241 
242 int mv88e6xxx_g2_pvt_read(struct mv88e6xxx_chip *chip, int src_dev,
243 			  int src_port, u16 *data)
244 {
245 	int err;
246 
247 	err = mv88e6xxx_g2_pvt_op_wait(chip);
248 	if (err)
249 		return err;
250 
251 	err = mv88e6xxx_g2_pvt_op(chip, src_dev, src_port,
252 				  MV88E6XXX_G2_PVT_ADDR_OP_READ);
253 	if (err)
254 		return err;
255 
256 	return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_PVT_DATA, data);
257 }
258 
259 int mv88e6xxx_g2_pvt_write(struct mv88e6xxx_chip *chip, int src_dev,
260 			   int src_port, u16 data)
261 {
262 	int err;
263 
264 	err = mv88e6xxx_g2_pvt_op_wait(chip);
265 	if (err)
266 		return err;
267 
268 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_PVT_DATA, data);
269 	if (err)
270 		return err;
271 
272 	return mv88e6xxx_g2_pvt_op(chip, src_dev, src_port,
273 				   MV88E6XXX_G2_PVT_ADDR_OP_WRITE_PVLAN);
274 }
275 
276 /* Offset 0x0D: Switch MAC/WoL/WoF register */
277 
278 static int mv88e6xxx_g2_switch_mac_write(struct mv88e6xxx_chip *chip,
279 					 unsigned int pointer, u8 data)
280 {
281 	u16 val = (pointer << 8) | data;
282 
283 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SWITCH_MAC,
284 				  MV88E6XXX_G2_SWITCH_MAC_UPDATE | val);
285 }
286 
287 int mv88e6xxx_g2_set_switch_mac(struct mv88e6xxx_chip *chip, u8 *addr)
288 {
289 	int i, err;
290 
291 	for (i = 0; i < 6; i++) {
292 		err = mv88e6xxx_g2_switch_mac_write(chip, i, addr[i]);
293 		if (err)
294 			break;
295 	}
296 
297 	return err;
298 }
299 
300 /* Offset 0x0E: ATU Statistics */
301 
302 int mv88e6xxx_g2_atu_stats_set(struct mv88e6xxx_chip *chip, u16 kind, u16 bin)
303 {
304 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_ATU_STATS,
305 				  kind | bin);
306 }
307 
308 int mv88e6xxx_g2_atu_stats_get(struct mv88e6xxx_chip *chip, u16 *stats)
309 {
310 	return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_ATU_STATS, stats);
311 }
312 
313 /* Offset 0x0F: Priority Override Table */
314 
315 static int mv88e6xxx_g2_pot_write(struct mv88e6xxx_chip *chip, int pointer,
316 				  u8 data)
317 {
318 	u16 val = (pointer << 8) | (data & 0x7);
319 
320 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_PRIO_OVERRIDE,
321 				  MV88E6XXX_G2_PRIO_OVERRIDE_UPDATE | val);
322 }
323 
324 int mv88e6xxx_g2_pot_clear(struct mv88e6xxx_chip *chip)
325 {
326 	int i, err;
327 
328 	/* Clear all sixteen possible Priority Override entries */
329 	for (i = 0; i < 16; i++) {
330 		err = mv88e6xxx_g2_pot_write(chip, i, 0);
331 		if (err)
332 			break;
333 	}
334 
335 	return err;
336 }
337 
338 /* Offset 0x14: EEPROM Command
339  * Offset 0x15: EEPROM Data (for 16-bit data access)
340  * Offset 0x15: EEPROM Addr (for 8-bit data access)
341  */
342 
343 static int mv88e6xxx_g2_eeprom_wait(struct mv88e6xxx_chip *chip)
344 {
345 	int bit = __bf_shf(MV88E6XXX_G2_EEPROM_CMD_BUSY);
346 	int err;
347 
348 	err = mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_EEPROM_CMD, bit, 0);
349 	if (err)
350 		return err;
351 
352 	bit = __bf_shf(MV88E6XXX_G2_EEPROM_CMD_RUNNING);
353 
354 	return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_EEPROM_CMD, bit, 0);
355 }
356 
357 static int mv88e6xxx_g2_eeprom_cmd(struct mv88e6xxx_chip *chip, u16 cmd)
358 {
359 	int err;
360 
361 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_EEPROM_CMD,
362 				 MV88E6XXX_G2_EEPROM_CMD_BUSY | cmd);
363 	if (err)
364 		return err;
365 
366 	return mv88e6xxx_g2_eeprom_wait(chip);
367 }
368 
369 static int mv88e6xxx_g2_eeprom_read8(struct mv88e6xxx_chip *chip,
370 				     u16 addr, u8 *data)
371 {
372 	u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_READ;
373 	int err;
374 
375 	err = mv88e6xxx_g2_eeprom_wait(chip);
376 	if (err)
377 		return err;
378 
379 	err = mv88e6xxx_g2_write(chip, MV88E6390_G2_EEPROM_ADDR, addr);
380 	if (err)
381 		return err;
382 
383 	err = mv88e6xxx_g2_eeprom_cmd(chip, cmd);
384 	if (err)
385 		return err;
386 
387 	err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_EEPROM_CMD, &cmd);
388 	if (err)
389 		return err;
390 
391 	*data = cmd & 0xff;
392 
393 	return 0;
394 }
395 
396 static int mv88e6xxx_g2_eeprom_write8(struct mv88e6xxx_chip *chip,
397 				      u16 addr, u8 data)
398 {
399 	u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_WRITE |
400 		MV88E6XXX_G2_EEPROM_CMD_WRITE_EN;
401 	int err;
402 
403 	err = mv88e6xxx_g2_eeprom_wait(chip);
404 	if (err)
405 		return err;
406 
407 	err = mv88e6xxx_g2_write(chip, MV88E6390_G2_EEPROM_ADDR, addr);
408 	if (err)
409 		return err;
410 
411 	return mv88e6xxx_g2_eeprom_cmd(chip, cmd | data);
412 }
413 
414 static int mv88e6xxx_g2_eeprom_read16(struct mv88e6xxx_chip *chip,
415 				      u8 addr, u16 *data)
416 {
417 	u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_READ | addr;
418 	int err;
419 
420 	err = mv88e6xxx_g2_eeprom_wait(chip);
421 	if (err)
422 		return err;
423 
424 	err = mv88e6xxx_g2_eeprom_cmd(chip, cmd);
425 	if (err)
426 		return err;
427 
428 	return mv88e6xxx_g2_read(chip, MV88E6352_G2_EEPROM_DATA, data);
429 }
430 
431 static int mv88e6xxx_g2_eeprom_write16(struct mv88e6xxx_chip *chip,
432 				       u8 addr, u16 data)
433 {
434 	u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_WRITE | addr;
435 	int err;
436 
437 	err = mv88e6xxx_g2_eeprom_wait(chip);
438 	if (err)
439 		return err;
440 
441 	err = mv88e6xxx_g2_write(chip, MV88E6352_G2_EEPROM_DATA, data);
442 	if (err)
443 		return err;
444 
445 	return mv88e6xxx_g2_eeprom_cmd(chip, cmd);
446 }
447 
448 int mv88e6xxx_g2_get_eeprom8(struct mv88e6xxx_chip *chip,
449 			     struct ethtool_eeprom *eeprom, u8 *data)
450 {
451 	unsigned int offset = eeprom->offset;
452 	unsigned int len = eeprom->len;
453 	int err;
454 
455 	eeprom->len = 0;
456 
457 	while (len) {
458 		err = mv88e6xxx_g2_eeprom_read8(chip, offset, data);
459 		if (err)
460 			return err;
461 
462 		eeprom->len++;
463 		offset++;
464 		data++;
465 		len--;
466 	}
467 
468 	return 0;
469 }
470 
471 int mv88e6xxx_g2_set_eeprom8(struct mv88e6xxx_chip *chip,
472 			     struct ethtool_eeprom *eeprom, u8 *data)
473 {
474 	unsigned int offset = eeprom->offset;
475 	unsigned int len = eeprom->len;
476 	int err;
477 
478 	eeprom->len = 0;
479 
480 	while (len) {
481 		err = mv88e6xxx_g2_eeprom_write8(chip, offset, *data);
482 		if (err)
483 			return err;
484 
485 		eeprom->len++;
486 		offset++;
487 		data++;
488 		len--;
489 	}
490 
491 	return 0;
492 }
493 
494 int mv88e6xxx_g2_get_eeprom16(struct mv88e6xxx_chip *chip,
495 			      struct ethtool_eeprom *eeprom, u8 *data)
496 {
497 	unsigned int offset = eeprom->offset;
498 	unsigned int len = eeprom->len;
499 	u16 val;
500 	int err;
501 
502 	eeprom->len = 0;
503 
504 	if (offset & 1) {
505 		err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val);
506 		if (err)
507 			return err;
508 
509 		*data++ = (val >> 8) & 0xff;
510 
511 		offset++;
512 		len--;
513 		eeprom->len++;
514 	}
515 
516 	while (len >= 2) {
517 		err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val);
518 		if (err)
519 			return err;
520 
521 		*data++ = val & 0xff;
522 		*data++ = (val >> 8) & 0xff;
523 
524 		offset += 2;
525 		len -= 2;
526 		eeprom->len += 2;
527 	}
528 
529 	if (len) {
530 		err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val);
531 		if (err)
532 			return err;
533 
534 		*data++ = val & 0xff;
535 
536 		offset++;
537 		len--;
538 		eeprom->len++;
539 	}
540 
541 	return 0;
542 }
543 
544 int mv88e6xxx_g2_set_eeprom16(struct mv88e6xxx_chip *chip,
545 			      struct ethtool_eeprom *eeprom, u8 *data)
546 {
547 	unsigned int offset = eeprom->offset;
548 	unsigned int len = eeprom->len;
549 	u16 val;
550 	int err;
551 
552 	/* Ensure the RO WriteEn bit is set */
553 	err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_EEPROM_CMD, &val);
554 	if (err)
555 		return err;
556 
557 	if (!(val & MV88E6XXX_G2_EEPROM_CMD_WRITE_EN))
558 		return -EROFS;
559 
560 	eeprom->len = 0;
561 
562 	if (offset & 1) {
563 		err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val);
564 		if (err)
565 			return err;
566 
567 		val = (*data++ << 8) | (val & 0xff);
568 
569 		err = mv88e6xxx_g2_eeprom_write16(chip, offset >> 1, val);
570 		if (err)
571 			return err;
572 
573 		offset++;
574 		len--;
575 		eeprom->len++;
576 	}
577 
578 	while (len >= 2) {
579 		val = *data++;
580 		val |= *data++ << 8;
581 
582 		err = mv88e6xxx_g2_eeprom_write16(chip, offset >> 1, val);
583 		if (err)
584 			return err;
585 
586 		offset += 2;
587 		len -= 2;
588 		eeprom->len += 2;
589 	}
590 
591 	if (len) {
592 		err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val);
593 		if (err)
594 			return err;
595 
596 		val = (val & 0xff00) | *data++;
597 
598 		err = mv88e6xxx_g2_eeprom_write16(chip, offset >> 1, val);
599 		if (err)
600 			return err;
601 
602 		offset++;
603 		len--;
604 		eeprom->len++;
605 	}
606 
607 	return 0;
608 }
609 
610 /* Offset 0x18: SMI PHY Command Register
611  * Offset 0x19: SMI PHY Data Register
612  */
613 
614 static int mv88e6xxx_g2_smi_phy_wait(struct mv88e6xxx_chip *chip)
615 {
616 	int bit = __bf_shf(MV88E6XXX_G2_SMI_PHY_CMD_BUSY);
617 
618 	return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_SMI_PHY_CMD, bit, 0);
619 }
620 
621 static int mv88e6xxx_g2_smi_phy_cmd(struct mv88e6xxx_chip *chip, u16 cmd)
622 {
623 	int err;
624 
625 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_CMD,
626 				 MV88E6XXX_G2_SMI_PHY_CMD_BUSY | cmd);
627 	if (err)
628 		return err;
629 
630 	return mv88e6xxx_g2_smi_phy_wait(chip);
631 }
632 
633 static int mv88e6xxx_g2_smi_phy_access(struct mv88e6xxx_chip *chip,
634 				       bool external, bool c45, u16 op, int dev,
635 				       int reg)
636 {
637 	u16 cmd = op;
638 
639 	if (external)
640 		cmd |= MV88E6390_G2_SMI_PHY_CMD_FUNC_EXTERNAL;
641 	else
642 		cmd |= MV88E6390_G2_SMI_PHY_CMD_FUNC_INTERNAL; /* empty mask */
643 
644 	if (c45)
645 		cmd |= MV88E6XXX_G2_SMI_PHY_CMD_MODE_45; /* empty mask */
646 	else
647 		cmd |= MV88E6XXX_G2_SMI_PHY_CMD_MODE_22;
648 
649 	dev <<= __bf_shf(MV88E6XXX_G2_SMI_PHY_CMD_DEV_ADDR_MASK);
650 	cmd |= dev & MV88E6XXX_G2_SMI_PHY_CMD_DEV_ADDR_MASK;
651 	cmd |= reg & MV88E6XXX_G2_SMI_PHY_CMD_REG_ADDR_MASK;
652 
653 	return mv88e6xxx_g2_smi_phy_cmd(chip, cmd);
654 }
655 
656 static int mv88e6xxx_g2_smi_phy_access_c22(struct mv88e6xxx_chip *chip,
657 					   bool external, u16 op, int dev,
658 					   int reg)
659 {
660 	return mv88e6xxx_g2_smi_phy_access(chip, external, false, op, dev, reg);
661 }
662 
663 /* IEEE 802.3 Clause 22 Read Data Register */
664 static int mv88e6xxx_g2_smi_phy_read_data_c22(struct mv88e6xxx_chip *chip,
665 					      bool external, int dev, int reg,
666 					      u16 *data)
667 {
668 	u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_22_READ_DATA;
669 	int err;
670 
671 	err = mv88e6xxx_g2_smi_phy_wait(chip);
672 	if (err)
673 		return err;
674 
675 	err = mv88e6xxx_g2_smi_phy_access_c22(chip, external, op, dev, reg);
676 	if (err)
677 		return err;
678 
679 	return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_SMI_PHY_DATA, data);
680 }
681 
682 /* IEEE 802.3 Clause 22 Write Data Register */
683 static int mv88e6xxx_g2_smi_phy_write_data_c22(struct mv88e6xxx_chip *chip,
684 					       bool external, int dev, int reg,
685 					       u16 data)
686 {
687 	u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_22_WRITE_DATA;
688 	int err;
689 
690 	err = mv88e6xxx_g2_smi_phy_wait(chip);
691 	if (err)
692 		return err;
693 
694 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_DATA, data);
695 	if (err)
696 		return err;
697 
698 	return mv88e6xxx_g2_smi_phy_access_c22(chip, external, op, dev, reg);
699 }
700 
701 static int mv88e6xxx_g2_smi_phy_access_c45(struct mv88e6xxx_chip *chip,
702 					   bool external, u16 op, int port,
703 					   int dev)
704 {
705 	return mv88e6xxx_g2_smi_phy_access(chip, external, true, op, port, dev);
706 }
707 
708 /* IEEE 802.3 Clause 45 Write Address Register */
709 static int mv88e6xxx_g2_smi_phy_write_addr_c45(struct mv88e6xxx_chip *chip,
710 					       bool external, int port, int dev,
711 					       int addr)
712 {
713 	u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_45_WRITE_ADDR;
714 	int err;
715 
716 	err = mv88e6xxx_g2_smi_phy_wait(chip);
717 	if (err)
718 		return err;
719 
720 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_DATA, addr);
721 	if (err)
722 		return err;
723 
724 	return mv88e6xxx_g2_smi_phy_access_c45(chip, external, op, port, dev);
725 }
726 
727 /* IEEE 802.3 Clause 45 Read Data Register */
728 static int mv88e6xxx_g2_smi_phy_read_data_c45(struct mv88e6xxx_chip *chip,
729 					      bool external, int port, int dev,
730 					      u16 *data)
731 {
732 	u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_45_READ_DATA;
733 	int err;
734 
735 	err = mv88e6xxx_g2_smi_phy_access_c45(chip, external, op, port, dev);
736 	if (err)
737 		return err;
738 
739 	return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_SMI_PHY_DATA, data);
740 }
741 
742 static int _mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip,
743 					  bool external, int port, int devad,
744 					  int reg, u16 *data)
745 {
746 	int err;
747 
748 	err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, devad,
749 						  reg);
750 	if (err)
751 		return err;
752 
753 	return mv88e6xxx_g2_smi_phy_read_data_c45(chip, external, port, devad,
754 						  data);
755 }
756 
757 /* IEEE 802.3 Clause 45 Write Data Register */
758 static int mv88e6xxx_g2_smi_phy_write_data_c45(struct mv88e6xxx_chip *chip,
759 					       bool external, int port, int dev,
760 					       u16 data)
761 {
762 	u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_45_WRITE_DATA;
763 	int err;
764 
765 	err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_DATA, data);
766 	if (err)
767 		return err;
768 
769 	return mv88e6xxx_g2_smi_phy_access_c45(chip, external, op, port, dev);
770 }
771 
772 static int _mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip,
773 					   bool external, int port, int devad,
774 					   int reg, u16 data)
775 {
776 	int err;
777 
778 	err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, devad,
779 						  reg);
780 	if (err)
781 		return err;
782 
783 	return mv88e6xxx_g2_smi_phy_write_data_c45(chip, external, port, devad,
784 						   data);
785 }
786 
787 int mv88e6xxx_g2_smi_phy_read_c22(struct mv88e6xxx_chip *chip,
788 				  struct mii_bus *bus,
789 				  int addr, int reg, u16 *val)
790 {
791 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
792 	bool external = mdio_bus->external;
793 
794 	return mv88e6xxx_g2_smi_phy_read_data_c22(chip, external, addr, reg,
795 						  val);
796 }
797 
798 int mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip,
799 				  struct mii_bus *bus, int addr, int devad,
800 				  int reg, u16 *val)
801 {
802 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
803 	bool external = mdio_bus->external;
804 
805 	return _mv88e6xxx_g2_smi_phy_read_c45(chip, external, addr, devad, reg,
806 					      val);
807 }
808 
809 int mv88e6xxx_g2_smi_phy_write_c22(struct mv88e6xxx_chip *chip,
810 				   struct mii_bus *bus, int addr, int reg,
811 				   u16 val)
812 {
813 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
814 	bool external = mdio_bus->external;
815 
816 	return mv88e6xxx_g2_smi_phy_write_data_c22(chip, external, addr, reg,
817 						   val);
818 }
819 
820 int mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip,
821 				   struct mii_bus *bus, int addr, int devad,
822 				   int reg, u16 val)
823 {
824 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
825 	bool external = mdio_bus->external;
826 
827 	return _mv88e6xxx_g2_smi_phy_write_c45(chip, external, addr, devad, reg,
828 					       val);
829 }
830 
831 /* Offset 0x1B: Watchdog Control */
832 static int mv88e6097_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
833 {
834 	u16 reg;
835 
836 	mv88e6xxx_g2_read(chip, MV88E6352_G2_WDOG_CTL, &reg);
837 
838 	dev_info(chip->dev, "Watchdog event: 0x%04x", reg);
839 
840 	return IRQ_HANDLED;
841 }
842 
843 static void mv88e6097_watchdog_free(struct mv88e6xxx_chip *chip)
844 {
845 	u16 reg;
846 
847 	mv88e6xxx_g2_read(chip, MV88E6352_G2_WDOG_CTL, &reg);
848 
849 	reg &= ~(MV88E6352_G2_WDOG_CTL_EGRESS_ENABLE |
850 		 MV88E6352_G2_WDOG_CTL_QC_ENABLE);
851 
852 	mv88e6xxx_g2_write(chip, MV88E6352_G2_WDOG_CTL, reg);
853 }
854 
855 static int mv88e6097_watchdog_setup(struct mv88e6xxx_chip *chip)
856 {
857 	return mv88e6xxx_g2_write(chip, MV88E6352_G2_WDOG_CTL,
858 				  MV88E6352_G2_WDOG_CTL_EGRESS_ENABLE |
859 				  MV88E6352_G2_WDOG_CTL_QC_ENABLE |
860 				  MV88E6352_G2_WDOG_CTL_SWRESET);
861 }
862 
863 const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops = {
864 	.irq_action = mv88e6097_watchdog_action,
865 	.irq_setup = mv88e6097_watchdog_setup,
866 	.irq_free = mv88e6097_watchdog_free,
867 };
868 
869 static void mv88e6250_watchdog_free(struct mv88e6xxx_chip *chip)
870 {
871 	u16 reg;
872 
873 	mv88e6xxx_g2_read(chip, MV88E6250_G2_WDOG_CTL, &reg);
874 
875 	reg &= ~(MV88E6250_G2_WDOG_CTL_EGRESS_ENABLE |
876 		 MV88E6250_G2_WDOG_CTL_QC_ENABLE);
877 
878 	mv88e6xxx_g2_write(chip, MV88E6250_G2_WDOG_CTL, reg);
879 }
880 
881 static int mv88e6250_watchdog_setup(struct mv88e6xxx_chip *chip)
882 {
883 	return mv88e6xxx_g2_write(chip, MV88E6250_G2_WDOG_CTL,
884 				  MV88E6250_G2_WDOG_CTL_EGRESS_ENABLE |
885 				  MV88E6250_G2_WDOG_CTL_QC_ENABLE |
886 				  MV88E6250_G2_WDOG_CTL_SWRESET);
887 }
888 
889 const struct mv88e6xxx_irq_ops mv88e6250_watchdog_ops = {
890 	.irq_action = mv88e6097_watchdog_action,
891 	.irq_setup = mv88e6250_watchdog_setup,
892 	.irq_free = mv88e6250_watchdog_free,
893 };
894 
895 static int mv88e6390_watchdog_setup(struct mv88e6xxx_chip *chip)
896 {
897 	return mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL,
898 				  MV88E6390_G2_WDOG_CTL_UPDATE |
899 				  MV88E6390_G2_WDOG_CTL_PTR_INT_ENABLE |
900 				  MV88E6390_G2_WDOG_CTL_CUT_THROUGH |
901 				  MV88E6390_G2_WDOG_CTL_QUEUE_CONTROLLER |
902 				  MV88E6390_G2_WDOG_CTL_EGRESS |
903 				  MV88E6390_G2_WDOG_CTL_FORCE_IRQ);
904 }
905 
906 static int mv88e6390_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
907 {
908 	u16 reg;
909 
910 	mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL,
911 			   MV88E6390_G2_WDOG_CTL_PTR_EVENT);
912 	mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, &reg);
913 
914 	dev_info(chip->dev, "Watchdog event: 0x%04x",
915 		 reg & MV88E6390_G2_WDOG_CTL_DATA_MASK);
916 
917 	mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL,
918 			   MV88E6390_G2_WDOG_CTL_PTR_HISTORY);
919 	mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, &reg);
920 
921 	dev_info(chip->dev, "Watchdog history: 0x%04x",
922 		 reg & MV88E6390_G2_WDOG_CTL_DATA_MASK);
923 
924 	/* Trigger a software reset to try to recover the switch */
925 	if (chip->info->ops->reset)
926 		chip->info->ops->reset(chip);
927 
928 	mv88e6390_watchdog_setup(chip);
929 
930 	return IRQ_HANDLED;
931 }
932 
933 static void mv88e6390_watchdog_free(struct mv88e6xxx_chip *chip)
934 {
935 	mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL,
936 			   MV88E6390_G2_WDOG_CTL_UPDATE |
937 			   MV88E6390_G2_WDOG_CTL_PTR_INT_ENABLE);
938 }
939 
940 const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops = {
941 	.irq_action = mv88e6390_watchdog_action,
942 	.irq_setup = mv88e6390_watchdog_setup,
943 	.irq_free = mv88e6390_watchdog_free,
944 };
945 
946 static int mv88e6393x_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
947 {
948 	mv88e6390_watchdog_action(chip, irq);
949 
950 	/* Fix for clearing the force WD event bit.
951 	 * Unreleased erratum on mv88e6393x.
952 	 */
953 	mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL,
954 			   MV88E6390_G2_WDOG_CTL_UPDATE |
955 			   MV88E6390_G2_WDOG_CTL_PTR_EVENT);
956 
957 	return IRQ_HANDLED;
958 }
959 
960 const struct mv88e6xxx_irq_ops mv88e6393x_watchdog_ops = {
961 	.irq_action = mv88e6393x_watchdog_action,
962 	.irq_setup = mv88e6390_watchdog_setup,
963 	.irq_free = mv88e6390_watchdog_free,
964 };
965 
966 static irqreturn_t mv88e6xxx_g2_watchdog_thread_fn(int irq, void *dev_id)
967 {
968 	struct mv88e6xxx_chip *chip = dev_id;
969 	irqreturn_t ret = IRQ_NONE;
970 
971 	mv88e6xxx_reg_lock(chip);
972 	if (chip->info->ops->watchdog_ops->irq_action)
973 		ret = chip->info->ops->watchdog_ops->irq_action(chip, irq);
974 	mv88e6xxx_reg_unlock(chip);
975 
976 	return ret;
977 }
978 
979 static void mv88e6xxx_g2_watchdog_free(struct mv88e6xxx_chip *chip)
980 {
981 	mv88e6xxx_reg_lock(chip);
982 	if (chip->info->ops->watchdog_ops->irq_free)
983 		chip->info->ops->watchdog_ops->irq_free(chip);
984 	mv88e6xxx_reg_unlock(chip);
985 
986 	free_irq(chip->watchdog_irq, chip);
987 	irq_dispose_mapping(chip->watchdog_irq);
988 }
989 
990 static int mv88e6xxx_g2_watchdog_setup(struct mv88e6xxx_chip *chip)
991 {
992 	int err;
993 
994 	chip->watchdog_irq = irq_find_mapping(chip->g2_irq.domain,
995 					      MV88E6XXX_G2_INT_SOURCE_WATCHDOG);
996 	if (chip->watchdog_irq < 0)
997 		return chip->watchdog_irq;
998 
999 	snprintf(chip->watchdog_irq_name, sizeof(chip->watchdog_irq_name),
1000 		 "mv88e6xxx-%s-watchdog", dev_name(chip->dev));
1001 
1002 	err = request_threaded_irq(chip->watchdog_irq, NULL,
1003 				   mv88e6xxx_g2_watchdog_thread_fn,
1004 				   IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
1005 				   chip->watchdog_irq_name, chip);
1006 	if (err)
1007 		return err;
1008 
1009 	mv88e6xxx_reg_lock(chip);
1010 	if (chip->info->ops->watchdog_ops->irq_setup)
1011 		err = chip->info->ops->watchdog_ops->irq_setup(chip);
1012 	mv88e6xxx_reg_unlock(chip);
1013 
1014 	return err;
1015 }
1016 
1017 /* Offset 0x1D: Misc Register */
1018 
1019 static int mv88e6xxx_g2_misc_5_bit_port(struct mv88e6xxx_chip *chip,
1020 					bool port_5_bit)
1021 {
1022 	u16 val;
1023 	int err;
1024 
1025 	err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_MISC, &val);
1026 	if (err)
1027 		return err;
1028 
1029 	if (port_5_bit)
1030 		val |= MV88E6XXX_G2_MISC_5_BIT_PORT;
1031 	else
1032 		val &= ~MV88E6XXX_G2_MISC_5_BIT_PORT;
1033 
1034 	return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_MISC, val);
1035 }
1036 
1037 int mv88e6xxx_g2_misc_4_bit_port(struct mv88e6xxx_chip *chip)
1038 {
1039 	return mv88e6xxx_g2_misc_5_bit_port(chip, false);
1040 }
1041 
1042 static void mv88e6xxx_g2_irq_mask(struct irq_data *d)
1043 {
1044 	struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d);
1045 	unsigned int n = d->hwirq;
1046 
1047 	chip->g2_irq.masked |= (1 << n);
1048 }
1049 
1050 static void mv88e6xxx_g2_irq_unmask(struct irq_data *d)
1051 {
1052 	struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d);
1053 	unsigned int n = d->hwirq;
1054 
1055 	chip->g2_irq.masked &= ~(1 << n);
1056 }
1057 
1058 static irqreturn_t mv88e6xxx_g2_irq_thread_fn(int irq, void *dev_id)
1059 {
1060 	struct mv88e6xxx_chip *chip = dev_id;
1061 	unsigned int nhandled = 0;
1062 	unsigned int sub_irq;
1063 	unsigned int n;
1064 	int err;
1065 	u16 reg;
1066 
1067 	mv88e6xxx_reg_lock(chip);
1068 	err = mv88e6xxx_g2_int_source(chip, &reg);
1069 	mv88e6xxx_reg_unlock(chip);
1070 	if (err)
1071 		goto out;
1072 
1073 	for (n = 0; n < 16; ++n) {
1074 		if (reg & (1 << n)) {
1075 			sub_irq = irq_find_mapping(chip->g2_irq.domain, n);
1076 			handle_nested_irq(sub_irq);
1077 			++nhandled;
1078 		}
1079 	}
1080 out:
1081 	return (nhandled > 0 ? IRQ_HANDLED : IRQ_NONE);
1082 }
1083 
1084 static void mv88e6xxx_g2_irq_bus_lock(struct irq_data *d)
1085 {
1086 	struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d);
1087 
1088 	mv88e6xxx_reg_lock(chip);
1089 }
1090 
1091 static void mv88e6xxx_g2_irq_bus_sync_unlock(struct irq_data *d)
1092 {
1093 	struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d);
1094 	int err;
1095 
1096 	err = mv88e6xxx_g2_int_mask(chip, ~chip->g2_irq.masked);
1097 	if (err)
1098 		dev_err(chip->dev, "failed to mask interrupts\n");
1099 
1100 	mv88e6xxx_reg_unlock(chip);
1101 }
1102 
1103 static const struct irq_chip mv88e6xxx_g2_irq_chip = {
1104 	.name			= "mv88e6xxx-g2",
1105 	.irq_mask		= mv88e6xxx_g2_irq_mask,
1106 	.irq_unmask		= mv88e6xxx_g2_irq_unmask,
1107 	.irq_bus_lock		= mv88e6xxx_g2_irq_bus_lock,
1108 	.irq_bus_sync_unlock	= mv88e6xxx_g2_irq_bus_sync_unlock,
1109 };
1110 
1111 static int mv88e6xxx_g2_irq_domain_map(struct irq_domain *d,
1112 				       unsigned int irq,
1113 				       irq_hw_number_t hwirq)
1114 {
1115 	struct mv88e6xxx_chip *chip = d->host_data;
1116 
1117 	irq_set_chip_data(irq, d->host_data);
1118 	irq_set_chip_and_handler(irq, &chip->g2_irq.chip, handle_level_irq);
1119 	irq_set_noprobe(irq);
1120 
1121 	return 0;
1122 }
1123 
1124 static const struct irq_domain_ops mv88e6xxx_g2_irq_domain_ops = {
1125 	.map	= mv88e6xxx_g2_irq_domain_map,
1126 	.xlate	= irq_domain_xlate_twocell,
1127 };
1128 
1129 void mv88e6xxx_g2_irq_free(struct mv88e6xxx_chip *chip)
1130 {
1131 	int irq, virq;
1132 
1133 	mv88e6xxx_g2_watchdog_free(chip);
1134 
1135 	free_irq(chip->device_irq, chip);
1136 	irq_dispose_mapping(chip->device_irq);
1137 
1138 	for (irq = 0; irq < 16; irq++) {
1139 		virq = irq_find_mapping(chip->g2_irq.domain, irq);
1140 		irq_dispose_mapping(virq);
1141 	}
1142 
1143 	irq_domain_remove(chip->g2_irq.domain);
1144 }
1145 
1146 int mv88e6xxx_g2_irq_setup(struct mv88e6xxx_chip *chip)
1147 {
1148 	int err, irq, virq;
1149 
1150 	chip->g2_irq.masked = ~0;
1151 	mv88e6xxx_reg_lock(chip);
1152 	err = mv88e6xxx_g2_int_mask(chip, ~chip->g2_irq.masked);
1153 	mv88e6xxx_reg_unlock(chip);
1154 	if (err)
1155 		return err;
1156 
1157 	chip->g2_irq.domain = irq_domain_add_simple(
1158 		chip->dev->of_node, 16, 0, &mv88e6xxx_g2_irq_domain_ops, chip);
1159 	if (!chip->g2_irq.domain)
1160 		return -ENOMEM;
1161 
1162 	for (irq = 0; irq < 16; irq++)
1163 		irq_create_mapping(chip->g2_irq.domain, irq);
1164 
1165 	chip->g2_irq.chip = mv88e6xxx_g2_irq_chip;
1166 
1167 	chip->device_irq = irq_find_mapping(chip->g1_irq.domain,
1168 					    MV88E6XXX_G1_STS_IRQ_DEVICE);
1169 	if (chip->device_irq < 0) {
1170 		err = chip->device_irq;
1171 		goto out;
1172 	}
1173 
1174 	snprintf(chip->device_irq_name, sizeof(chip->device_irq_name),
1175 		 "mv88e6xxx-%s-g2", dev_name(chip->dev));
1176 
1177 	err = request_threaded_irq(chip->device_irq, NULL,
1178 				   mv88e6xxx_g2_irq_thread_fn,
1179 				   IRQF_ONESHOT, chip->device_irq_name, chip);
1180 	if (err)
1181 		goto out;
1182 
1183 	return mv88e6xxx_g2_watchdog_setup(chip);
1184 
1185 out:
1186 	for (irq = 0; irq < 16; irq++) {
1187 		virq = irq_find_mapping(chip->g2_irq.domain, irq);
1188 		irq_dispose_mapping(virq);
1189 	}
1190 
1191 	irq_domain_remove(chip->g2_irq.domain);
1192 
1193 	return err;
1194 }
1195 
1196 int mv88e6xxx_g2_irq_mdio_setup(struct mv88e6xxx_chip *chip,
1197 				struct mii_bus *bus)
1198 {
1199 	int phy, irq;
1200 
1201 	for (phy = 0; phy < chip->info->num_internal_phys; phy++) {
1202 		irq = irq_find_mapping(chip->g2_irq.domain, phy);
1203 		if (irq < 0)
1204 			return irq;
1205 
1206 		bus->irq[chip->info->phy_base_addr + phy] = irq;
1207 	}
1208 	return 0;
1209 }
1210 
1211 void mv88e6xxx_g2_irq_mdio_free(struct mv88e6xxx_chip *chip,
1212 				struct mii_bus *bus)
1213 {
1214 }
1215