1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2009 Felix Fietkau <nbd@nbd.name>
4 * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (c) 2015, 2019, The Linux Foundation. All rights reserved.
6 * Copyright (c) 2016 John Crispin <john@phrozen.org>
7 */
8
9 #include <linux/module.h>
10 #include <linux/phy.h>
11 #include <linux/netdevice.h>
12 #include <net/dsa.h>
13 #include <linux/of_net.h>
14 #include <linux/of_mdio.h>
15 #include <linux/of_platform.h>
16 #include <linux/if_bridge.h>
17 #include <linux/mdio.h>
18 #include <linux/phylink.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/etherdevice.h>
21
22 #include "qca8k.h"
23
24 #define MIB_DESC(_s, _o, _n) \
25 { \
26 .size = (_s), \
27 .offset = (_o), \
28 .name = (_n), \
29 }
30
31 static const struct qca8k_mib_desc ar8327_mib[] = {
32 MIB_DESC(1, 0x00, "RxBroad"),
33 MIB_DESC(1, 0x04, "RxPause"),
34 MIB_DESC(1, 0x08, "RxMulti"),
35 MIB_DESC(1, 0x0c, "RxFcsErr"),
36 MIB_DESC(1, 0x10, "RxAlignErr"),
37 MIB_DESC(1, 0x14, "RxRunt"),
38 MIB_DESC(1, 0x18, "RxFragment"),
39 MIB_DESC(1, 0x1c, "Rx64Byte"),
40 MIB_DESC(1, 0x20, "Rx128Byte"),
41 MIB_DESC(1, 0x24, "Rx256Byte"),
42 MIB_DESC(1, 0x28, "Rx512Byte"),
43 MIB_DESC(1, 0x2c, "Rx1024Byte"),
44 MIB_DESC(1, 0x30, "Rx1518Byte"),
45 MIB_DESC(1, 0x34, "RxMaxByte"),
46 MIB_DESC(1, 0x38, "RxTooLong"),
47 MIB_DESC(2, 0x3c, "RxGoodByte"),
48 MIB_DESC(2, 0x44, "RxBadByte"),
49 MIB_DESC(1, 0x4c, "RxOverFlow"),
50 MIB_DESC(1, 0x50, "Filtered"),
51 MIB_DESC(1, 0x54, "TxBroad"),
52 MIB_DESC(1, 0x58, "TxPause"),
53 MIB_DESC(1, 0x5c, "TxMulti"),
54 MIB_DESC(1, 0x60, "TxUnderRun"),
55 MIB_DESC(1, 0x64, "Tx64Byte"),
56 MIB_DESC(1, 0x68, "Tx128Byte"),
57 MIB_DESC(1, 0x6c, "Tx256Byte"),
58 MIB_DESC(1, 0x70, "Tx512Byte"),
59 MIB_DESC(1, 0x74, "Tx1024Byte"),
60 MIB_DESC(1, 0x78, "Tx1518Byte"),
61 MIB_DESC(1, 0x7c, "TxMaxByte"),
62 MIB_DESC(1, 0x80, "TxOverSize"),
63 MIB_DESC(2, 0x84, "TxByte"),
64 MIB_DESC(1, 0x8c, "TxCollision"),
65 MIB_DESC(1, 0x90, "TxAbortCol"),
66 MIB_DESC(1, 0x94, "TxMultiCol"),
67 MIB_DESC(1, 0x98, "TxSingleCol"),
68 MIB_DESC(1, 0x9c, "TxExcDefer"),
69 MIB_DESC(1, 0xa0, "TxDefer"),
70 MIB_DESC(1, 0xa4, "TxLateCol"),
71 };
72
73 /* The 32bit switch registers are accessed indirectly. To achieve this we need
74 * to set the page of the register. Track the last page that was set to reduce
75 * mdio writes
76 */
77 static u16 qca8k_current_page = 0xffff;
78
79 static void
qca8k_split_addr(u32 regaddr,u16 * r1,u16 * r2,u16 * page)80 qca8k_split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
81 {
82 regaddr >>= 1;
83 *r1 = regaddr & 0x1e;
84
85 regaddr >>= 5;
86 *r2 = regaddr & 0x7;
87
88 regaddr >>= 3;
89 *page = regaddr & 0x3ff;
90 }
91
92 static int
qca8k_mii_read32(struct mii_bus * bus,int phy_id,u32 regnum,u32 * val)93 qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum, u32 *val)
94 {
95 int ret;
96
97 ret = bus->read(bus, phy_id, regnum);
98 if (ret >= 0) {
99 *val = ret;
100 ret = bus->read(bus, phy_id, regnum + 1);
101 *val |= ret << 16;
102 }
103
104 if (ret < 0) {
105 dev_err_ratelimited(&bus->dev,
106 "failed to read qca8k 32bit register\n");
107 *val = 0;
108 return ret;
109 }
110
111 return 0;
112 }
113
114 static void
qca8k_mii_write32(struct mii_bus * bus,int phy_id,u32 regnum,u32 val)115 qca8k_mii_write32(struct mii_bus *bus, int phy_id, u32 regnum, u32 val)
116 {
117 u16 lo, hi;
118 int ret;
119
120 lo = val & 0xffff;
121 hi = (u16)(val >> 16);
122
123 ret = bus->write(bus, phy_id, regnum, lo);
124 if (ret >= 0)
125 ret = bus->write(bus, phy_id, regnum + 1, hi);
126 if (ret < 0)
127 dev_err_ratelimited(&bus->dev,
128 "failed to write qca8k 32bit register\n");
129 }
130
131 static int
qca8k_set_page(struct mii_bus * bus,u16 page)132 qca8k_set_page(struct mii_bus *bus, u16 page)
133 {
134 int ret;
135
136 if (page == qca8k_current_page)
137 return 0;
138
139 ret = bus->write(bus, 0x18, 0, page);
140 if (ret < 0) {
141 dev_err_ratelimited(&bus->dev,
142 "failed to set qca8k page\n");
143 return ret;
144 }
145
146 qca8k_current_page = page;
147 usleep_range(1000, 2000);
148 return 0;
149 }
150
151 static int
qca8k_read(struct qca8k_priv * priv,u32 reg,u32 * val)152 qca8k_read(struct qca8k_priv *priv, u32 reg, u32 *val)
153 {
154 struct mii_bus *bus = priv->bus;
155 u16 r1, r2, page;
156 int ret;
157
158 qca8k_split_addr(reg, &r1, &r2, &page);
159
160 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
161
162 ret = qca8k_set_page(bus, page);
163 if (ret < 0)
164 goto exit;
165
166 ret = qca8k_mii_read32(bus, 0x10 | r2, r1, val);
167
168 exit:
169 mutex_unlock(&bus->mdio_lock);
170 return ret;
171 }
172
173 static int
qca8k_write(struct qca8k_priv * priv,u32 reg,u32 val)174 qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val)
175 {
176 struct mii_bus *bus = priv->bus;
177 u16 r1, r2, page;
178 int ret;
179
180 qca8k_split_addr(reg, &r1, &r2, &page);
181
182 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
183
184 ret = qca8k_set_page(bus, page);
185 if (ret < 0)
186 goto exit;
187
188 qca8k_mii_write32(bus, 0x10 | r2, r1, val);
189
190 exit:
191 mutex_unlock(&bus->mdio_lock);
192 return ret;
193 }
194
195 static int
qca8k_rmw(struct qca8k_priv * priv,u32 reg,u32 mask,u32 write_val)196 qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 write_val)
197 {
198 struct mii_bus *bus = priv->bus;
199 u16 r1, r2, page;
200 u32 val;
201 int ret;
202
203 qca8k_split_addr(reg, &r1, &r2, &page);
204
205 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
206
207 ret = qca8k_set_page(bus, page);
208 if (ret < 0)
209 goto exit;
210
211 ret = qca8k_mii_read32(bus, 0x10 | r2, r1, &val);
212 if (ret < 0)
213 goto exit;
214
215 val &= ~mask;
216 val |= write_val;
217 qca8k_mii_write32(bus, 0x10 | r2, r1, val);
218
219 exit:
220 mutex_unlock(&bus->mdio_lock);
221
222 return ret;
223 }
224
225 static int
qca8k_reg_set(struct qca8k_priv * priv,u32 reg,u32 val)226 qca8k_reg_set(struct qca8k_priv *priv, u32 reg, u32 val)
227 {
228 return qca8k_rmw(priv, reg, 0, val);
229 }
230
231 static int
qca8k_reg_clear(struct qca8k_priv * priv,u32 reg,u32 val)232 qca8k_reg_clear(struct qca8k_priv *priv, u32 reg, u32 val)
233 {
234 return qca8k_rmw(priv, reg, val, 0);
235 }
236
237 static int
qca8k_regmap_read(void * ctx,uint32_t reg,uint32_t * val)238 qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
239 {
240 struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
241
242 return qca8k_read(priv, reg, val);
243 }
244
245 static int
qca8k_regmap_write(void * ctx,uint32_t reg,uint32_t val)246 qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val)
247 {
248 struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
249
250 return qca8k_write(priv, reg, val);
251 }
252
253 static const struct regmap_range qca8k_readable_ranges[] = {
254 regmap_reg_range(0x0000, 0x00e4), /* Global control */
255 regmap_reg_range(0x0100, 0x0168), /* EEE control */
256 regmap_reg_range(0x0200, 0x0270), /* Parser control */
257 regmap_reg_range(0x0400, 0x0454), /* ACL */
258 regmap_reg_range(0x0600, 0x0718), /* Lookup */
259 regmap_reg_range(0x0800, 0x0b70), /* QM */
260 regmap_reg_range(0x0c00, 0x0c80), /* PKT */
261 regmap_reg_range(0x0e00, 0x0e98), /* L3 */
262 regmap_reg_range(0x1000, 0x10ac), /* MIB - Port0 */
263 regmap_reg_range(0x1100, 0x11ac), /* MIB - Port1 */
264 regmap_reg_range(0x1200, 0x12ac), /* MIB - Port2 */
265 regmap_reg_range(0x1300, 0x13ac), /* MIB - Port3 */
266 regmap_reg_range(0x1400, 0x14ac), /* MIB - Port4 */
267 regmap_reg_range(0x1500, 0x15ac), /* MIB - Port5 */
268 regmap_reg_range(0x1600, 0x16ac), /* MIB - Port6 */
269
270 };
271
272 static const struct regmap_access_table qca8k_readable_table = {
273 .yes_ranges = qca8k_readable_ranges,
274 .n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges),
275 };
276
277 static struct regmap_config qca8k_regmap_config = {
278 .reg_bits = 16,
279 .val_bits = 32,
280 .reg_stride = 4,
281 .max_register = 0x16ac, /* end MIB - Port6 range */
282 .reg_read = qca8k_regmap_read,
283 .reg_write = qca8k_regmap_write,
284 .rd_table = &qca8k_readable_table,
285 };
286
287 static int
qca8k_busy_wait(struct qca8k_priv * priv,u32 reg,u32 mask)288 qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
289 {
290 int ret, ret1;
291 u32 val;
292
293 ret = read_poll_timeout(qca8k_read, ret1, !(val & mask),
294 0, QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false,
295 priv, reg, &val);
296
297 /* Check if qca8k_read has failed for a different reason
298 * before returning -ETIMEDOUT
299 */
300 if (ret < 0 && ret1 < 0)
301 return ret1;
302
303 return ret;
304 }
305
306 static int
qca8k_fdb_read(struct qca8k_priv * priv,struct qca8k_fdb * fdb)307 qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
308 {
309 u32 reg[4], val;
310 int i, ret;
311
312 /* load the ARL table into an array */
313 for (i = 0; i < 4; i++) {
314 ret = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4), &val);
315 if (ret < 0)
316 return ret;
317
318 reg[i] = val;
319 }
320
321 /* vid - 83:72 */
322 fdb->vid = (reg[2] >> QCA8K_ATU_VID_S) & QCA8K_ATU_VID_M;
323 /* aging - 67:64 */
324 fdb->aging = reg[2] & QCA8K_ATU_STATUS_M;
325 /* portmask - 54:48 */
326 fdb->port_mask = (reg[1] >> QCA8K_ATU_PORT_S) & QCA8K_ATU_PORT_M;
327 /* mac - 47:0 */
328 fdb->mac[0] = (reg[1] >> QCA8K_ATU_ADDR0_S) & 0xff;
329 fdb->mac[1] = reg[1] & 0xff;
330 fdb->mac[2] = (reg[0] >> QCA8K_ATU_ADDR2_S) & 0xff;
331 fdb->mac[3] = (reg[0] >> QCA8K_ATU_ADDR3_S) & 0xff;
332 fdb->mac[4] = (reg[0] >> QCA8K_ATU_ADDR4_S) & 0xff;
333 fdb->mac[5] = reg[0] & 0xff;
334
335 return 0;
336 }
337
338 static void
qca8k_fdb_write(struct qca8k_priv * priv,u16 vid,u8 port_mask,const u8 * mac,u8 aging)339 qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac,
340 u8 aging)
341 {
342 u32 reg[3] = { 0 };
343 int i;
344
345 /* vid - 83:72 */
346 reg[2] = (vid & QCA8K_ATU_VID_M) << QCA8K_ATU_VID_S;
347 /* aging - 67:64 */
348 reg[2] |= aging & QCA8K_ATU_STATUS_M;
349 /* portmask - 54:48 */
350 reg[1] = (port_mask & QCA8K_ATU_PORT_M) << QCA8K_ATU_PORT_S;
351 /* mac - 47:0 */
352 reg[1] |= mac[0] << QCA8K_ATU_ADDR0_S;
353 reg[1] |= mac[1];
354 reg[0] |= mac[2] << QCA8K_ATU_ADDR2_S;
355 reg[0] |= mac[3] << QCA8K_ATU_ADDR3_S;
356 reg[0] |= mac[4] << QCA8K_ATU_ADDR4_S;
357 reg[0] |= mac[5];
358
359 /* load the array into the ARL table */
360 for (i = 0; i < 3; i++)
361 qca8k_write(priv, QCA8K_REG_ATU_DATA0 + (i * 4), reg[i]);
362 }
363
364 static int
qca8k_fdb_access(struct qca8k_priv * priv,enum qca8k_fdb_cmd cmd,int port)365 qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port)
366 {
367 u32 reg;
368 int ret;
369
370 /* Set the command and FDB index */
371 reg = QCA8K_ATU_FUNC_BUSY;
372 reg |= cmd;
373 if (port >= 0) {
374 reg |= QCA8K_ATU_FUNC_PORT_EN;
375 reg |= (port & QCA8K_ATU_FUNC_PORT_M) << QCA8K_ATU_FUNC_PORT_S;
376 }
377
378 /* Write the function register triggering the table access */
379 ret = qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg);
380 if (ret)
381 return ret;
382
383 /* wait for completion */
384 ret = qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY);
385 if (ret)
386 return ret;
387
388 /* Check for table full violation when adding an entry */
389 if (cmd == QCA8K_FDB_LOAD) {
390 ret = qca8k_read(priv, QCA8K_REG_ATU_FUNC, ®);
391 if (ret < 0)
392 return ret;
393 if (reg & QCA8K_ATU_FUNC_FULL)
394 return -1;
395 }
396
397 return 0;
398 }
399
400 static int
qca8k_fdb_next(struct qca8k_priv * priv,struct qca8k_fdb * fdb,int port)401 qca8k_fdb_next(struct qca8k_priv *priv, struct qca8k_fdb *fdb, int port)
402 {
403 int ret;
404
405 qca8k_fdb_write(priv, fdb->vid, fdb->port_mask, fdb->mac, fdb->aging);
406 ret = qca8k_fdb_access(priv, QCA8K_FDB_NEXT, port);
407 if (ret < 0)
408 return ret;
409
410 return qca8k_fdb_read(priv, fdb);
411 }
412
413 static int
qca8k_fdb_add(struct qca8k_priv * priv,const u8 * mac,u16 port_mask,u16 vid,u8 aging)414 qca8k_fdb_add(struct qca8k_priv *priv, const u8 *mac, u16 port_mask,
415 u16 vid, u8 aging)
416 {
417 int ret;
418
419 mutex_lock(&priv->reg_mutex);
420 qca8k_fdb_write(priv, vid, port_mask, mac, aging);
421 ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1);
422 mutex_unlock(&priv->reg_mutex);
423
424 return ret;
425 }
426
427 static int
qca8k_fdb_del(struct qca8k_priv * priv,const u8 * mac,u16 port_mask,u16 vid)428 qca8k_fdb_del(struct qca8k_priv *priv, const u8 *mac, u16 port_mask, u16 vid)
429 {
430 int ret;
431
432 mutex_lock(&priv->reg_mutex);
433 qca8k_fdb_write(priv, vid, port_mask, mac, 0);
434 ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1);
435 mutex_unlock(&priv->reg_mutex);
436
437 return ret;
438 }
439
440 static void
qca8k_fdb_flush(struct qca8k_priv * priv)441 qca8k_fdb_flush(struct qca8k_priv *priv)
442 {
443 mutex_lock(&priv->reg_mutex);
444 qca8k_fdb_access(priv, QCA8K_FDB_FLUSH, -1);
445 mutex_unlock(&priv->reg_mutex);
446 }
447
448 static int
qca8k_vlan_access(struct qca8k_priv * priv,enum qca8k_vlan_cmd cmd,u16 vid)449 qca8k_vlan_access(struct qca8k_priv *priv, enum qca8k_vlan_cmd cmd, u16 vid)
450 {
451 u32 reg;
452 int ret;
453
454 /* Set the command and VLAN index */
455 reg = QCA8K_VTU_FUNC1_BUSY;
456 reg |= cmd;
457 reg |= vid << QCA8K_VTU_FUNC1_VID_S;
458
459 /* Write the function register triggering the table access */
460 ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC1, reg);
461 if (ret)
462 return ret;
463
464 /* wait for completion */
465 ret = qca8k_busy_wait(priv, QCA8K_REG_VTU_FUNC1, QCA8K_VTU_FUNC1_BUSY);
466 if (ret)
467 return ret;
468
469 /* Check for table full violation when adding an entry */
470 if (cmd == QCA8K_VLAN_LOAD) {
471 ret = qca8k_read(priv, QCA8K_REG_VTU_FUNC1, ®);
472 if (ret < 0)
473 return ret;
474 if (reg & QCA8K_VTU_FUNC1_FULL)
475 return -ENOMEM;
476 }
477
478 return 0;
479 }
480
481 static int
qca8k_vlan_add(struct qca8k_priv * priv,u8 port,u16 vid,bool untagged)482 qca8k_vlan_add(struct qca8k_priv *priv, u8 port, u16 vid, bool untagged)
483 {
484 u32 reg;
485 int ret;
486
487 /*
488 We do the right thing with VLAN 0 and treat it as untagged while
489 preserving the tag on egress.
490 */
491 if (vid == 0)
492 return 0;
493
494 mutex_lock(&priv->reg_mutex);
495 ret = qca8k_vlan_access(priv, QCA8K_VLAN_READ, vid);
496 if (ret < 0)
497 goto out;
498
499 ret = qca8k_read(priv, QCA8K_REG_VTU_FUNC0, ®);
500 if (ret < 0)
501 goto out;
502 reg |= QCA8K_VTU_FUNC0_VALID | QCA8K_VTU_FUNC0_IVL_EN;
503 reg &= ~(QCA8K_VTU_FUNC0_EG_MODE_MASK << QCA8K_VTU_FUNC0_EG_MODE_S(port));
504 if (untagged)
505 reg |= QCA8K_VTU_FUNC0_EG_MODE_UNTAG <<
506 QCA8K_VTU_FUNC0_EG_MODE_S(port);
507 else
508 reg |= QCA8K_VTU_FUNC0_EG_MODE_TAG <<
509 QCA8K_VTU_FUNC0_EG_MODE_S(port);
510
511 ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
512 if (ret)
513 goto out;
514 ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
515
516 out:
517 mutex_unlock(&priv->reg_mutex);
518
519 return ret;
520 }
521
522 static int
qca8k_vlan_del(struct qca8k_priv * priv,u8 port,u16 vid)523 qca8k_vlan_del(struct qca8k_priv *priv, u8 port, u16 vid)
524 {
525 u32 reg, mask;
526 int ret, i;
527 bool del;
528
529 mutex_lock(&priv->reg_mutex);
530 ret = qca8k_vlan_access(priv, QCA8K_VLAN_READ, vid);
531 if (ret < 0)
532 goto out;
533
534 ret = qca8k_read(priv, QCA8K_REG_VTU_FUNC0, ®);
535 if (ret < 0)
536 goto out;
537 reg &= ~(3 << QCA8K_VTU_FUNC0_EG_MODE_S(port));
538 reg |= QCA8K_VTU_FUNC0_EG_MODE_NOT <<
539 QCA8K_VTU_FUNC0_EG_MODE_S(port);
540
541 /* Check if we're the last member to be removed */
542 del = true;
543 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
544 mask = QCA8K_VTU_FUNC0_EG_MODE_NOT;
545 mask <<= QCA8K_VTU_FUNC0_EG_MODE_S(i);
546
547 if ((reg & mask) != mask) {
548 del = false;
549 break;
550 }
551 }
552
553 if (del) {
554 ret = qca8k_vlan_access(priv, QCA8K_VLAN_PURGE, vid);
555 } else {
556 ret = qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
557 if (ret)
558 goto out;
559 ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
560 }
561
562 out:
563 mutex_unlock(&priv->reg_mutex);
564
565 return ret;
566 }
567
568 static int
qca8k_mib_init(struct qca8k_priv * priv)569 qca8k_mib_init(struct qca8k_priv *priv)
570 {
571 int ret;
572
573 mutex_lock(&priv->reg_mutex);
574 ret = qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_FLUSH | QCA8K_MIB_BUSY);
575 if (ret)
576 goto exit;
577
578 ret = qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
579 if (ret)
580 goto exit;
581
582 ret = qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
583 if (ret)
584 goto exit;
585
586 ret = qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB);
587
588 exit:
589 mutex_unlock(&priv->reg_mutex);
590 return ret;
591 }
592
593 static void
qca8k_port_set_status(struct qca8k_priv * priv,int port,int enable)594 qca8k_port_set_status(struct qca8k_priv *priv, int port, int enable)
595 {
596 u32 mask = QCA8K_PORT_STATUS_TXMAC | QCA8K_PORT_STATUS_RXMAC;
597
598 /* Port 0 and 6 have no internal PHY */
599 if (port > 0 && port < 6)
600 mask |= QCA8K_PORT_STATUS_LINK_AUTO;
601
602 if (enable)
603 qca8k_reg_set(priv, QCA8K_REG_PORT_STATUS(port), mask);
604 else
605 qca8k_reg_clear(priv, QCA8K_REG_PORT_STATUS(port), mask);
606 }
607
608 static u32
qca8k_port_to_phy(int port)609 qca8k_port_to_phy(int port)
610 {
611 /* From Andrew Lunn:
612 * Port 0 has no internal phy.
613 * Port 1 has an internal PHY at MDIO address 0.
614 * Port 2 has an internal PHY at MDIO address 1.
615 * ...
616 * Port 5 has an internal PHY at MDIO address 4.
617 * Port 6 has no internal PHY.
618 */
619
620 return port - 1;
621 }
622
623 static int
qca8k_mdio_busy_wait(struct mii_bus * bus,u32 reg,u32 mask)624 qca8k_mdio_busy_wait(struct mii_bus *bus, u32 reg, u32 mask)
625 {
626 u16 r1, r2, page;
627 u32 val;
628 int ret, ret1;
629
630 qca8k_split_addr(reg, &r1, &r2, &page);
631
632 ret = read_poll_timeout(qca8k_mii_read32, ret1, !(val & mask), 0,
633 QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false,
634 bus, 0x10 | r2, r1, &val);
635
636 /* Check if qca8k_read has failed for a different reason
637 * before returnting -ETIMEDOUT
638 */
639 if (ret < 0 && ret1 < 0)
640 return ret1;
641
642 return ret;
643 }
644
645 static int
qca8k_mdio_write(struct mii_bus * bus,int phy,int regnum,u16 data)646 qca8k_mdio_write(struct mii_bus *bus, int phy, int regnum, u16 data)
647 {
648 u16 r1, r2, page;
649 u32 val;
650 int ret;
651
652 if (regnum >= QCA8K_MDIO_MASTER_MAX_REG)
653 return -EINVAL;
654
655 val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN |
656 QCA8K_MDIO_MASTER_WRITE | QCA8K_MDIO_MASTER_PHY_ADDR(phy) |
657 QCA8K_MDIO_MASTER_REG_ADDR(regnum) |
658 QCA8K_MDIO_MASTER_DATA(data);
659
660 qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
661
662 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
663
664 ret = qca8k_set_page(bus, page);
665 if (ret)
666 goto exit;
667
668 qca8k_mii_write32(bus, 0x10 | r2, r1, val);
669
670 ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL,
671 QCA8K_MDIO_MASTER_BUSY);
672
673 exit:
674 /* even if the busy_wait timeouts try to clear the MASTER_EN */
675 qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
676
677 mutex_unlock(&bus->mdio_lock);
678
679 return ret;
680 }
681
682 static int
qca8k_mdio_read(struct mii_bus * bus,int phy,int regnum)683 qca8k_mdio_read(struct mii_bus *bus, int phy, int regnum)
684 {
685 u16 r1, r2, page;
686 u32 val;
687 int ret;
688
689 if (regnum >= QCA8K_MDIO_MASTER_MAX_REG)
690 return -EINVAL;
691
692 val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN |
693 QCA8K_MDIO_MASTER_READ | QCA8K_MDIO_MASTER_PHY_ADDR(phy) |
694 QCA8K_MDIO_MASTER_REG_ADDR(regnum);
695
696 qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
697
698 mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
699
700 ret = qca8k_set_page(bus, page);
701 if (ret)
702 goto exit;
703
704 qca8k_mii_write32(bus, 0x10 | r2, r1, val);
705
706 ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL,
707 QCA8K_MDIO_MASTER_BUSY);
708 if (ret)
709 goto exit;
710
711 ret = qca8k_mii_read32(bus, 0x10 | r2, r1, &val);
712
713 exit:
714 /* even if the busy_wait timeouts try to clear the MASTER_EN */
715 qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
716
717 mutex_unlock(&bus->mdio_lock);
718
719 if (ret >= 0)
720 ret = val & QCA8K_MDIO_MASTER_DATA_MASK;
721
722 return ret;
723 }
724
725 static int
qca8k_internal_mdio_write(struct mii_bus * slave_bus,int phy,int regnum,u16 data)726 qca8k_internal_mdio_write(struct mii_bus *slave_bus, int phy, int regnum, u16 data)
727 {
728 struct qca8k_priv *priv = slave_bus->priv;
729 struct mii_bus *bus = priv->bus;
730
731 return qca8k_mdio_write(bus, phy, regnum, data);
732 }
733
734 static int
qca8k_internal_mdio_read(struct mii_bus * slave_bus,int phy,int regnum)735 qca8k_internal_mdio_read(struct mii_bus *slave_bus, int phy, int regnum)
736 {
737 struct qca8k_priv *priv = slave_bus->priv;
738 struct mii_bus *bus = priv->bus;
739
740 return qca8k_mdio_read(bus, phy, regnum);
741 }
742
743 static int
qca8k_phy_write(struct dsa_switch * ds,int port,int regnum,u16 data)744 qca8k_phy_write(struct dsa_switch *ds, int port, int regnum, u16 data)
745 {
746 struct qca8k_priv *priv = ds->priv;
747
748 /* Check if the legacy mapping should be used and the
749 * port is not correctly mapped to the right PHY in the
750 * devicetree
751 */
752 if (priv->legacy_phy_port_mapping)
753 port = qca8k_port_to_phy(port) % PHY_MAX_ADDR;
754
755 return qca8k_mdio_write(priv->bus, port, regnum, data);
756 }
757
758 static int
qca8k_phy_read(struct dsa_switch * ds,int port,int regnum)759 qca8k_phy_read(struct dsa_switch *ds, int port, int regnum)
760 {
761 struct qca8k_priv *priv = ds->priv;
762 int ret;
763
764 /* Check if the legacy mapping should be used and the
765 * port is not correctly mapped to the right PHY in the
766 * devicetree
767 */
768 if (priv->legacy_phy_port_mapping)
769 port = qca8k_port_to_phy(port) % PHY_MAX_ADDR;
770
771 ret = qca8k_mdio_read(priv->bus, port, regnum);
772
773 if (ret < 0)
774 return 0xffff;
775
776 return ret;
777 }
778
779 static int
qca8k_mdio_register(struct qca8k_priv * priv,struct device_node * mdio)780 qca8k_mdio_register(struct qca8k_priv *priv, struct device_node *mdio)
781 {
782 struct dsa_switch *ds = priv->ds;
783 struct mii_bus *bus;
784
785 bus = devm_mdiobus_alloc(ds->dev);
786
787 if (!bus)
788 return -ENOMEM;
789
790 bus->priv = (void *)priv;
791 bus->name = "qca8k slave mii";
792 bus->read = qca8k_internal_mdio_read;
793 bus->write = qca8k_internal_mdio_write;
794 snprintf(bus->id, MII_BUS_ID_SIZE, "qca8k-%d",
795 ds->index);
796
797 bus->parent = ds->dev;
798 bus->phy_mask = ~ds->phys_mii_mask;
799
800 ds->slave_mii_bus = bus;
801
802 return devm_of_mdiobus_register(priv->dev, bus, mdio);
803 }
804
805 static int
qca8k_setup_mdio_bus(struct qca8k_priv * priv)806 qca8k_setup_mdio_bus(struct qca8k_priv *priv)
807 {
808 u32 internal_mdio_mask = 0, external_mdio_mask = 0, reg;
809 struct device_node *ports, *port, *mdio;
810 phy_interface_t mode;
811 int err;
812
813 ports = of_get_child_by_name(priv->dev->of_node, "ports");
814 if (!ports)
815 ports = of_get_child_by_name(priv->dev->of_node, "ethernet-ports");
816
817 if (!ports)
818 return -EINVAL;
819
820 for_each_available_child_of_node(ports, port) {
821 err = of_property_read_u32(port, "reg", ®);
822 if (err) {
823 of_node_put(port);
824 of_node_put(ports);
825 return err;
826 }
827
828 if (!dsa_is_user_port(priv->ds, reg))
829 continue;
830
831 of_get_phy_mode(port, &mode);
832
833 if (of_property_read_bool(port, "phy-handle") &&
834 mode != PHY_INTERFACE_MODE_INTERNAL)
835 external_mdio_mask |= BIT(reg);
836 else
837 internal_mdio_mask |= BIT(reg);
838 }
839
840 of_node_put(ports);
841 if (!external_mdio_mask && !internal_mdio_mask) {
842 dev_err(priv->dev, "no PHYs are defined.\n");
843 return -EINVAL;
844 }
845
846 /* The QCA8K_MDIO_MASTER_EN Bit, which grants access to PHYs through
847 * the MDIO_MASTER register also _disconnects_ the external MDC
848 * passthrough to the internal PHYs. It's not possible to use both
849 * configurations at the same time!
850 *
851 * Because this came up during the review process:
852 * If the external mdio-bus driver is capable magically disabling
853 * the QCA8K_MDIO_MASTER_EN and mutex/spin-locking out the qca8k's
854 * accessors for the time being, it would be possible to pull this
855 * off.
856 */
857 if (!!external_mdio_mask && !!internal_mdio_mask) {
858 dev_err(priv->dev, "either internal or external mdio bus configuration is supported.\n");
859 return -EINVAL;
860 }
861
862 if (external_mdio_mask) {
863 /* Make sure to disable the internal mdio bus in cases
864 * a dt-overlay and driver reload changed the configuration
865 */
866
867 return qca8k_reg_clear(priv, QCA8K_MDIO_MASTER_CTRL,
868 QCA8K_MDIO_MASTER_EN);
869 }
870
871 /* Check if the devicetree declare the port:phy mapping */
872 mdio = of_get_child_by_name(priv->dev->of_node, "mdio");
873 if (of_device_is_available(mdio)) {
874 err = qca8k_mdio_register(priv, mdio);
875 if (err)
876 of_node_put(mdio);
877
878 return err;
879 }
880
881 /* If a mapping can't be found the legacy mapping is used,
882 * using the qca8k_port_to_phy function
883 */
884 priv->legacy_phy_port_mapping = true;
885 priv->ops.phy_read = qca8k_phy_read;
886 priv->ops.phy_write = qca8k_phy_write;
887
888 return 0;
889 }
890
891 static int
qca8k_setup_of_rgmii_delay(struct qca8k_priv * priv)892 qca8k_setup_of_rgmii_delay(struct qca8k_priv *priv)
893 {
894 struct device_node *port_dn;
895 phy_interface_t mode;
896 struct dsa_port *dp;
897 u32 val;
898
899 /* CPU port is already checked */
900 dp = dsa_to_port(priv->ds, 0);
901
902 port_dn = dp->dn;
903
904 /* Check if port 0 is set to the correct type */
905 of_get_phy_mode(port_dn, &mode);
906 if (mode != PHY_INTERFACE_MODE_RGMII_ID &&
907 mode != PHY_INTERFACE_MODE_RGMII_RXID &&
908 mode != PHY_INTERFACE_MODE_RGMII_TXID) {
909 return 0;
910 }
911
912 switch (mode) {
913 case PHY_INTERFACE_MODE_RGMII_ID:
914 case PHY_INTERFACE_MODE_RGMII_RXID:
915 if (of_property_read_u32(port_dn, "rx-internal-delay-ps", &val))
916 val = 2;
917 else
918 /* Switch regs accept value in ns, convert ps to ns */
919 val = val / 1000;
920
921 if (val > QCA8K_MAX_DELAY) {
922 dev_err(priv->dev, "rgmii rx delay is limited to a max value of 3ns, setting to the max value");
923 val = 3;
924 }
925
926 priv->rgmii_rx_delay = val;
927 /* Stop here if we need to check only for rx delay */
928 if (mode != PHY_INTERFACE_MODE_RGMII_ID)
929 break;
930
931 fallthrough;
932 case PHY_INTERFACE_MODE_RGMII_TXID:
933 if (of_property_read_u32(port_dn, "tx-internal-delay-ps", &val))
934 val = 1;
935 else
936 /* Switch regs accept value in ns, convert ps to ns */
937 val = val / 1000;
938
939 if (val > QCA8K_MAX_DELAY) {
940 dev_err(priv->dev, "rgmii tx delay is limited to a max value of 3ns, setting to the max value");
941 val = 3;
942 }
943
944 priv->rgmii_tx_delay = val;
945 break;
946 default:
947 return 0;
948 }
949
950 return 0;
951 }
952
953 static int
qca8k_setup(struct dsa_switch * ds)954 qca8k_setup(struct dsa_switch *ds)
955 {
956 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
957 int ret, i;
958 u32 mask;
959
960 /* Make sure that port 0 is the cpu port */
961 if (!dsa_is_cpu_port(ds, 0)) {
962 dev_err(priv->dev, "port 0 is not the CPU port");
963 return -EINVAL;
964 }
965
966 mutex_init(&priv->reg_mutex);
967
968 /* Start by setting up the register mapping */
969 priv->regmap = devm_regmap_init(ds->dev, NULL, priv,
970 &qca8k_regmap_config);
971 if (IS_ERR(priv->regmap))
972 dev_warn(priv->dev, "regmap initialization failed");
973
974 ret = qca8k_setup_mdio_bus(priv);
975 if (ret)
976 return ret;
977
978 ret = qca8k_setup_of_rgmii_delay(priv);
979 if (ret)
980 return ret;
981
982 /* Enable CPU Port */
983 ret = qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0,
984 QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN);
985 if (ret) {
986 dev_err(priv->dev, "failed enabling CPU port");
987 return ret;
988 }
989
990 /* Enable MIB counters */
991 ret = qca8k_mib_init(priv);
992 if (ret)
993 dev_warn(priv->dev, "mib init failed");
994
995 /* Enable QCA header mode on the cpu port */
996 ret = qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT),
997 QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S |
998 QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S);
999 if (ret) {
1000 dev_err(priv->dev, "failed enabling QCA header mode");
1001 return ret;
1002 }
1003
1004 /* Disable forwarding by default on all ports */
1005 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
1006 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
1007 QCA8K_PORT_LOOKUP_MEMBER, 0);
1008 if (ret)
1009 return ret;
1010 }
1011
1012 /* Disable MAC by default on all ports */
1013 for (i = 1; i < QCA8K_NUM_PORTS; i++)
1014 qca8k_port_set_status(priv, i, 0);
1015
1016 /* Forward all unknown frames to CPU port for Linux processing */
1017 ret = qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1,
1018 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S |
1019 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S |
1020 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S |
1021 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S);
1022 if (ret)
1023 return ret;
1024
1025 /* Setup connection between CPU port & user ports */
1026 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
1027 /* CPU port gets connected to all user ports of the switch */
1028 if (dsa_is_cpu_port(ds, i)) {
1029 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(QCA8K_CPU_PORT),
1030 QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds));
1031 if (ret)
1032 return ret;
1033 }
1034
1035 /* Individual user ports get connected to CPU port only */
1036 if (dsa_is_user_port(ds, i)) {
1037 int shift = 16 * (i % 2);
1038
1039 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
1040 QCA8K_PORT_LOOKUP_MEMBER,
1041 BIT(QCA8K_CPU_PORT));
1042 if (ret)
1043 return ret;
1044
1045 /* Enable ARP Auto-learning by default */
1046 ret = qca8k_reg_set(priv, QCA8K_PORT_LOOKUP_CTRL(i),
1047 QCA8K_PORT_LOOKUP_LEARN);
1048 if (ret)
1049 return ret;
1050
1051 /* For port based vlans to work we need to set the
1052 * default egress vid
1053 */
1054 ret = qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i),
1055 0xfff << shift,
1056 QCA8K_PORT_VID_DEF << shift);
1057 if (ret)
1058 return ret;
1059
1060 ret = qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i),
1061 QCA8K_PORT_VLAN_CVID(QCA8K_PORT_VID_DEF) |
1062 QCA8K_PORT_VLAN_SVID(QCA8K_PORT_VID_DEF));
1063 if (ret)
1064 return ret;
1065 }
1066 }
1067
1068 /* The port 5 of the qca8337 have some problem in flood condition. The
1069 * original legacy driver had some specific buffer and priority settings
1070 * for the different port suggested by the QCA switch team. Add this
1071 * missing settings to improve switch stability under load condition.
1072 * This problem is limited to qca8337 and other qca8k switch are not affected.
1073 */
1074 if (priv->switch_id == QCA8K_ID_QCA8337) {
1075 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
1076 switch (i) {
1077 /* The 2 CPU port and port 5 requires some different
1078 * priority than any other ports.
1079 */
1080 case 0:
1081 case 5:
1082 case 6:
1083 mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) |
1084 QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) |
1085 QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x4) |
1086 QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x4) |
1087 QCA8K_PORT_HOL_CTRL0_EG_PRI4(0x6) |
1088 QCA8K_PORT_HOL_CTRL0_EG_PRI5(0x8) |
1089 QCA8K_PORT_HOL_CTRL0_EG_PORT(0x1e);
1090 break;
1091 default:
1092 mask = QCA8K_PORT_HOL_CTRL0_EG_PRI0(0x3) |
1093 QCA8K_PORT_HOL_CTRL0_EG_PRI1(0x4) |
1094 QCA8K_PORT_HOL_CTRL0_EG_PRI2(0x6) |
1095 QCA8K_PORT_HOL_CTRL0_EG_PRI3(0x8) |
1096 QCA8K_PORT_HOL_CTRL0_EG_PORT(0x19);
1097 }
1098 qca8k_write(priv, QCA8K_REG_PORT_HOL_CTRL0(i), mask);
1099
1100 mask = QCA8K_PORT_HOL_CTRL1_ING(0x6) |
1101 QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN |
1102 QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN |
1103 QCA8K_PORT_HOL_CTRL1_WRED_EN;
1104 qca8k_rmw(priv, QCA8K_REG_PORT_HOL_CTRL1(i),
1105 QCA8K_PORT_HOL_CTRL1_ING_BUF |
1106 QCA8K_PORT_HOL_CTRL1_EG_PRI_BUF_EN |
1107 QCA8K_PORT_HOL_CTRL1_EG_PORT_BUF_EN |
1108 QCA8K_PORT_HOL_CTRL1_WRED_EN,
1109 mask);
1110 }
1111 }
1112
1113 /* Special GLOBAL_FC_THRESH value are needed for ar8327 switch */
1114 if (priv->switch_id == QCA8K_ID_QCA8327) {
1115 mask = QCA8K_GLOBAL_FC_GOL_XON_THRES(288) |
1116 QCA8K_GLOBAL_FC_GOL_XOFF_THRES(496);
1117 qca8k_rmw(priv, QCA8K_REG_GLOBAL_FC_THRESH,
1118 QCA8K_GLOBAL_FC_GOL_XON_THRES_S |
1119 QCA8K_GLOBAL_FC_GOL_XOFF_THRES_S,
1120 mask);
1121 }
1122
1123 /* Setup our port MTUs to match power on defaults */
1124 for (i = 0; i < QCA8K_NUM_PORTS; i++)
1125 priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN;
1126 ret = qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN);
1127 if (ret)
1128 dev_warn(priv->dev, "failed setting MTU settings");
1129
1130 /* Flush the FDB table */
1131 qca8k_fdb_flush(priv);
1132
1133 /* We don't have interrupts for link changes, so we need to poll */
1134 ds->pcs_poll = true;
1135
1136 return 0;
1137 }
1138
1139 static void
qca8k_phylink_mac_config(struct dsa_switch * ds,int port,unsigned int mode,const struct phylink_link_state * state)1140 qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
1141 const struct phylink_link_state *state)
1142 {
1143 struct qca8k_priv *priv = ds->priv;
1144 u32 reg, val;
1145 int ret;
1146
1147 switch (port) {
1148 case 0: /* 1st CPU port */
1149 if (state->interface != PHY_INTERFACE_MODE_RGMII &&
1150 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
1151 state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
1152 state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
1153 state->interface != PHY_INTERFACE_MODE_SGMII)
1154 return;
1155
1156 reg = QCA8K_REG_PORT0_PAD_CTRL;
1157 break;
1158 case 1:
1159 case 2:
1160 case 3:
1161 case 4:
1162 case 5:
1163 /* Internal PHY, nothing to do */
1164 return;
1165 case 6: /* 2nd CPU port / external PHY */
1166 if (state->interface != PHY_INTERFACE_MODE_RGMII &&
1167 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
1168 state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
1169 state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
1170 state->interface != PHY_INTERFACE_MODE_SGMII &&
1171 state->interface != PHY_INTERFACE_MODE_1000BASEX)
1172 return;
1173
1174 reg = QCA8K_REG_PORT6_PAD_CTRL;
1175 break;
1176 default:
1177 dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
1178 return;
1179 }
1180
1181 if (port != 6 && phylink_autoneg_inband(mode)) {
1182 dev_err(ds->dev, "%s: in-band negotiation unsupported\n",
1183 __func__);
1184 return;
1185 }
1186
1187 switch (state->interface) {
1188 case PHY_INTERFACE_MODE_RGMII:
1189 /* RGMII mode means no delay so don't enable the delay */
1190 qca8k_write(priv, reg, QCA8K_PORT_PAD_RGMII_EN);
1191 break;
1192 case PHY_INTERFACE_MODE_RGMII_ID:
1193 case PHY_INTERFACE_MODE_RGMII_TXID:
1194 case PHY_INTERFACE_MODE_RGMII_RXID:
1195 /* RGMII_ID needs internal delay. This is enabled through
1196 * PORT5_PAD_CTRL for all ports, rather than individual port
1197 * registers
1198 */
1199 qca8k_write(priv, reg,
1200 QCA8K_PORT_PAD_RGMII_EN |
1201 QCA8K_PORT_PAD_RGMII_TX_DELAY(priv->rgmii_tx_delay) |
1202 QCA8K_PORT_PAD_RGMII_RX_DELAY(priv->rgmii_rx_delay) |
1203 QCA8K_PORT_PAD_RGMII_TX_DELAY_EN |
1204 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
1205 /* QCA8337 requires to set rgmii rx delay */
1206 if (priv->switch_id == QCA8K_ID_QCA8337)
1207 qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL,
1208 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
1209 break;
1210 case PHY_INTERFACE_MODE_SGMII:
1211 case PHY_INTERFACE_MODE_1000BASEX:
1212 /* Enable SGMII on the port */
1213 qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
1214
1215 /* Enable/disable SerDes auto-negotiation as necessary */
1216 ret = qca8k_read(priv, QCA8K_REG_PWS, &val);
1217 if (ret)
1218 return;
1219 if (phylink_autoneg_inband(mode))
1220 val &= ~QCA8K_PWS_SERDES_AEN_DIS;
1221 else
1222 val |= QCA8K_PWS_SERDES_AEN_DIS;
1223 qca8k_write(priv, QCA8K_REG_PWS, val);
1224
1225 /* Configure the SGMII parameters */
1226 ret = qca8k_read(priv, QCA8K_REG_SGMII_CTRL, &val);
1227 if (ret)
1228 return;
1229
1230 val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX |
1231 QCA8K_SGMII_EN_TX | QCA8K_SGMII_EN_SD;
1232
1233 if (dsa_is_cpu_port(ds, port)) {
1234 /* CPU port, we're talking to the CPU MAC, be a PHY */
1235 val &= ~QCA8K_SGMII_MODE_CTRL_MASK;
1236 val |= QCA8K_SGMII_MODE_CTRL_PHY;
1237 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) {
1238 val &= ~QCA8K_SGMII_MODE_CTRL_MASK;
1239 val |= QCA8K_SGMII_MODE_CTRL_MAC;
1240 } else if (state->interface == PHY_INTERFACE_MODE_1000BASEX) {
1241 val &= ~QCA8K_SGMII_MODE_CTRL_MASK;
1242 val |= QCA8K_SGMII_MODE_CTRL_BASEX;
1243 }
1244
1245 qca8k_write(priv, QCA8K_REG_SGMII_CTRL, val);
1246 break;
1247 default:
1248 dev_err(ds->dev, "xMII mode %s not supported for port %d\n",
1249 phy_modes(state->interface), port);
1250 return;
1251 }
1252 }
1253
1254 static void
qca8k_phylink_validate(struct dsa_switch * ds,int port,unsigned long * supported,struct phylink_link_state * state)1255 qca8k_phylink_validate(struct dsa_switch *ds, int port,
1256 unsigned long *supported,
1257 struct phylink_link_state *state)
1258 {
1259 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
1260
1261 switch (port) {
1262 case 0: /* 1st CPU port */
1263 if (state->interface != PHY_INTERFACE_MODE_NA &&
1264 state->interface != PHY_INTERFACE_MODE_RGMII &&
1265 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
1266 state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
1267 state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
1268 state->interface != PHY_INTERFACE_MODE_SGMII)
1269 goto unsupported;
1270 break;
1271 case 1:
1272 case 2:
1273 case 3:
1274 case 4:
1275 case 5:
1276 /* Internal PHY */
1277 if (state->interface != PHY_INTERFACE_MODE_NA &&
1278 state->interface != PHY_INTERFACE_MODE_GMII &&
1279 state->interface != PHY_INTERFACE_MODE_INTERNAL)
1280 goto unsupported;
1281 break;
1282 case 6: /* 2nd CPU port / external PHY */
1283 if (state->interface != PHY_INTERFACE_MODE_NA &&
1284 state->interface != PHY_INTERFACE_MODE_RGMII &&
1285 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
1286 state->interface != PHY_INTERFACE_MODE_RGMII_TXID &&
1287 state->interface != PHY_INTERFACE_MODE_RGMII_RXID &&
1288 state->interface != PHY_INTERFACE_MODE_SGMII &&
1289 state->interface != PHY_INTERFACE_MODE_1000BASEX)
1290 goto unsupported;
1291 break;
1292 default:
1293 unsupported:
1294 linkmode_zero(supported);
1295 return;
1296 }
1297
1298 phylink_set_port_modes(mask);
1299 phylink_set(mask, Autoneg);
1300
1301 phylink_set(mask, 1000baseT_Full);
1302 phylink_set(mask, 10baseT_Half);
1303 phylink_set(mask, 10baseT_Full);
1304 phylink_set(mask, 100baseT_Half);
1305 phylink_set(mask, 100baseT_Full);
1306
1307 if (state->interface == PHY_INTERFACE_MODE_1000BASEX)
1308 phylink_set(mask, 1000baseX_Full);
1309
1310 phylink_set(mask, Pause);
1311 phylink_set(mask, Asym_Pause);
1312
1313 linkmode_and(supported, supported, mask);
1314 linkmode_and(state->advertising, state->advertising, mask);
1315 }
1316
1317 static int
qca8k_phylink_mac_link_state(struct dsa_switch * ds,int port,struct phylink_link_state * state)1318 qca8k_phylink_mac_link_state(struct dsa_switch *ds, int port,
1319 struct phylink_link_state *state)
1320 {
1321 struct qca8k_priv *priv = ds->priv;
1322 u32 reg;
1323 int ret;
1324
1325 ret = qca8k_read(priv, QCA8K_REG_PORT_STATUS(port), ®);
1326 if (ret < 0)
1327 return ret;
1328
1329 state->link = !!(reg & QCA8K_PORT_STATUS_LINK_UP);
1330 state->an_complete = state->link;
1331 state->an_enabled = !!(reg & QCA8K_PORT_STATUS_LINK_AUTO);
1332 state->duplex = (reg & QCA8K_PORT_STATUS_DUPLEX) ? DUPLEX_FULL :
1333 DUPLEX_HALF;
1334
1335 switch (reg & QCA8K_PORT_STATUS_SPEED) {
1336 case QCA8K_PORT_STATUS_SPEED_10:
1337 state->speed = SPEED_10;
1338 break;
1339 case QCA8K_PORT_STATUS_SPEED_100:
1340 state->speed = SPEED_100;
1341 break;
1342 case QCA8K_PORT_STATUS_SPEED_1000:
1343 state->speed = SPEED_1000;
1344 break;
1345 default:
1346 state->speed = SPEED_UNKNOWN;
1347 break;
1348 }
1349
1350 state->pause = MLO_PAUSE_NONE;
1351 if (reg & QCA8K_PORT_STATUS_RXFLOW)
1352 state->pause |= MLO_PAUSE_RX;
1353 if (reg & QCA8K_PORT_STATUS_TXFLOW)
1354 state->pause |= MLO_PAUSE_TX;
1355
1356 return 1;
1357 }
1358
1359 static void
qca8k_phylink_mac_link_down(struct dsa_switch * ds,int port,unsigned int mode,phy_interface_t interface)1360 qca8k_phylink_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode,
1361 phy_interface_t interface)
1362 {
1363 struct qca8k_priv *priv = ds->priv;
1364
1365 qca8k_port_set_status(priv, port, 0);
1366 }
1367
1368 static void
qca8k_phylink_mac_link_up(struct dsa_switch * ds,int port,unsigned int mode,phy_interface_t interface,struct phy_device * phydev,int speed,int duplex,bool tx_pause,bool rx_pause)1369 qca8k_phylink_mac_link_up(struct dsa_switch *ds, int port, unsigned int mode,
1370 phy_interface_t interface, struct phy_device *phydev,
1371 int speed, int duplex, bool tx_pause, bool rx_pause)
1372 {
1373 struct qca8k_priv *priv = ds->priv;
1374 u32 reg;
1375
1376 if (phylink_autoneg_inband(mode)) {
1377 reg = QCA8K_PORT_STATUS_LINK_AUTO;
1378 } else {
1379 switch (speed) {
1380 case SPEED_10:
1381 reg = QCA8K_PORT_STATUS_SPEED_10;
1382 break;
1383 case SPEED_100:
1384 reg = QCA8K_PORT_STATUS_SPEED_100;
1385 break;
1386 case SPEED_1000:
1387 reg = QCA8K_PORT_STATUS_SPEED_1000;
1388 break;
1389 default:
1390 reg = QCA8K_PORT_STATUS_LINK_AUTO;
1391 break;
1392 }
1393
1394 if (duplex == DUPLEX_FULL)
1395 reg |= QCA8K_PORT_STATUS_DUPLEX;
1396
1397 if (rx_pause || dsa_is_cpu_port(ds, port))
1398 reg |= QCA8K_PORT_STATUS_RXFLOW;
1399
1400 if (tx_pause || dsa_is_cpu_port(ds, port))
1401 reg |= QCA8K_PORT_STATUS_TXFLOW;
1402 }
1403
1404 reg |= QCA8K_PORT_STATUS_TXMAC | QCA8K_PORT_STATUS_RXMAC;
1405
1406 qca8k_write(priv, QCA8K_REG_PORT_STATUS(port), reg);
1407 }
1408
1409 static void
qca8k_get_strings(struct dsa_switch * ds,int port,u32 stringset,uint8_t * data)1410 qca8k_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *data)
1411 {
1412 int i;
1413
1414 if (stringset != ETH_SS_STATS)
1415 return;
1416
1417 for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++)
1418 strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name,
1419 ETH_GSTRING_LEN);
1420 }
1421
1422 static void
qca8k_get_ethtool_stats(struct dsa_switch * ds,int port,uint64_t * data)1423 qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
1424 uint64_t *data)
1425 {
1426 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1427 const struct qca8k_mib_desc *mib;
1428 u32 reg, i, val;
1429 u32 hi = 0;
1430 int ret;
1431
1432 for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
1433 mib = &ar8327_mib[i];
1434 reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset;
1435
1436 ret = qca8k_read(priv, reg, &val);
1437 if (ret < 0)
1438 continue;
1439
1440 if (mib->size == 2) {
1441 ret = qca8k_read(priv, reg + 4, &hi);
1442 if (ret < 0)
1443 continue;
1444 }
1445
1446 data[i] = val;
1447 if (mib->size == 2)
1448 data[i] |= (u64)hi << 32;
1449 }
1450 }
1451
1452 static int
qca8k_get_sset_count(struct dsa_switch * ds,int port,int sset)1453 qca8k_get_sset_count(struct dsa_switch *ds, int port, int sset)
1454 {
1455 if (sset != ETH_SS_STATS)
1456 return 0;
1457
1458 return ARRAY_SIZE(ar8327_mib);
1459 }
1460
1461 static int
qca8k_set_mac_eee(struct dsa_switch * ds,int port,struct ethtool_eee * eee)1462 qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee)
1463 {
1464 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1465 u32 lpi_en = QCA8K_REG_EEE_CTRL_LPI_EN(port);
1466 u32 reg;
1467 int ret;
1468
1469 mutex_lock(&priv->reg_mutex);
1470 ret = qca8k_read(priv, QCA8K_REG_EEE_CTRL, ®);
1471 if (ret < 0)
1472 goto exit;
1473
1474 if (eee->eee_enabled)
1475 reg |= lpi_en;
1476 else
1477 reg &= ~lpi_en;
1478 ret = qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg);
1479
1480 exit:
1481 mutex_unlock(&priv->reg_mutex);
1482 return ret;
1483 }
1484
1485 static int
qca8k_get_mac_eee(struct dsa_switch * ds,int port,struct ethtool_eee * e)1486 qca8k_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
1487 {
1488 /* Nothing to do on the port's MAC */
1489 return 0;
1490 }
1491
1492 static void
qca8k_port_stp_state_set(struct dsa_switch * ds,int port,u8 state)1493 qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
1494 {
1495 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1496 u32 stp_state;
1497
1498 switch (state) {
1499 case BR_STATE_DISABLED:
1500 stp_state = QCA8K_PORT_LOOKUP_STATE_DISABLED;
1501 break;
1502 case BR_STATE_BLOCKING:
1503 stp_state = QCA8K_PORT_LOOKUP_STATE_BLOCKING;
1504 break;
1505 case BR_STATE_LISTENING:
1506 stp_state = QCA8K_PORT_LOOKUP_STATE_LISTENING;
1507 break;
1508 case BR_STATE_LEARNING:
1509 stp_state = QCA8K_PORT_LOOKUP_STATE_LEARNING;
1510 break;
1511 case BR_STATE_FORWARDING:
1512 default:
1513 stp_state = QCA8K_PORT_LOOKUP_STATE_FORWARD;
1514 break;
1515 }
1516
1517 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1518 QCA8K_PORT_LOOKUP_STATE_MASK, stp_state);
1519 }
1520
1521 static int
qca8k_port_bridge_join(struct dsa_switch * ds,int port,struct net_device * br)1522 qca8k_port_bridge_join(struct dsa_switch *ds, int port, struct net_device *br)
1523 {
1524 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1525 int port_mask = BIT(QCA8K_CPU_PORT);
1526 int i, ret;
1527
1528 for (i = 1; i < QCA8K_NUM_PORTS; i++) {
1529 if (dsa_to_port(ds, i)->bridge_dev != br)
1530 continue;
1531 /* Add this port to the portvlan mask of the other ports
1532 * in the bridge
1533 */
1534 ret = qca8k_reg_set(priv,
1535 QCA8K_PORT_LOOKUP_CTRL(i),
1536 BIT(port));
1537 if (ret)
1538 return ret;
1539 if (i != port)
1540 port_mask |= BIT(i);
1541 }
1542
1543 /* Add all other ports to this ports portvlan mask */
1544 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1545 QCA8K_PORT_LOOKUP_MEMBER, port_mask);
1546
1547 return ret;
1548 }
1549
1550 static void
qca8k_port_bridge_leave(struct dsa_switch * ds,int port,struct net_device * br)1551 qca8k_port_bridge_leave(struct dsa_switch *ds, int port, struct net_device *br)
1552 {
1553 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1554 int i;
1555
1556 for (i = 1; i < QCA8K_NUM_PORTS; i++) {
1557 if (dsa_to_port(ds, i)->bridge_dev != br)
1558 continue;
1559 /* Remove this port to the portvlan mask of the other ports
1560 * in the bridge
1561 */
1562 qca8k_reg_clear(priv,
1563 QCA8K_PORT_LOOKUP_CTRL(i),
1564 BIT(port));
1565 }
1566
1567 /* Set the cpu port to be the only one in the portvlan mask of
1568 * this port
1569 */
1570 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1571 QCA8K_PORT_LOOKUP_MEMBER, BIT(QCA8K_CPU_PORT));
1572 }
1573
1574 static int
qca8k_port_enable(struct dsa_switch * ds,int port,struct phy_device * phy)1575 qca8k_port_enable(struct dsa_switch *ds, int port,
1576 struct phy_device *phy)
1577 {
1578 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1579
1580 qca8k_port_set_status(priv, port, 1);
1581 priv->port_sts[port].enabled = 1;
1582
1583 if (dsa_is_user_port(ds, port))
1584 phy_support_asym_pause(phy);
1585
1586 return 0;
1587 }
1588
1589 static void
qca8k_port_disable(struct dsa_switch * ds,int port)1590 qca8k_port_disable(struct dsa_switch *ds, int port)
1591 {
1592 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1593
1594 qca8k_port_set_status(priv, port, 0);
1595 priv->port_sts[port].enabled = 0;
1596 }
1597
1598 static int
qca8k_port_change_mtu(struct dsa_switch * ds,int port,int new_mtu)1599 qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
1600 {
1601 struct qca8k_priv *priv = ds->priv;
1602 int ret, i, mtu = 0;
1603
1604 priv->port_mtu[port] = new_mtu;
1605
1606 for (i = 0; i < QCA8K_NUM_PORTS; i++)
1607 if (priv->port_mtu[i] > mtu)
1608 mtu = priv->port_mtu[i];
1609
1610 /* To change the MAX_FRAME_SIZE the cpu ports must be off or
1611 * the switch panics.
1612 * Turn off both cpu ports before applying the new value to prevent
1613 * this.
1614 */
1615 if (priv->port_sts[0].enabled)
1616 qca8k_port_set_status(priv, 0, 0);
1617
1618 if (priv->port_sts[6].enabled)
1619 qca8k_port_set_status(priv, 6, 0);
1620
1621 /* Include L2 header / FCS length */
1622 ret = qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN);
1623
1624 if (priv->port_sts[0].enabled)
1625 qca8k_port_set_status(priv, 0, 1);
1626
1627 if (priv->port_sts[6].enabled)
1628 qca8k_port_set_status(priv, 6, 1);
1629
1630 return ret;
1631 }
1632
1633 static int
qca8k_port_max_mtu(struct dsa_switch * ds,int port)1634 qca8k_port_max_mtu(struct dsa_switch *ds, int port)
1635 {
1636 return QCA8K_MAX_MTU;
1637 }
1638
1639 static int
qca8k_port_fdb_insert(struct qca8k_priv * priv,const u8 * addr,u16 port_mask,u16 vid)1640 qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
1641 u16 port_mask, u16 vid)
1642 {
1643 /* Set the vid to the port vlan id if no vid is set */
1644 if (!vid)
1645 vid = QCA8K_PORT_VID_DEF;
1646
1647 return qca8k_fdb_add(priv, addr, port_mask, vid,
1648 QCA8K_ATU_STATUS_STATIC);
1649 }
1650
1651 static int
qca8k_port_fdb_add(struct dsa_switch * ds,int port,const unsigned char * addr,u16 vid)1652 qca8k_port_fdb_add(struct dsa_switch *ds, int port,
1653 const unsigned char *addr, u16 vid)
1654 {
1655 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1656 u16 port_mask = BIT(port);
1657
1658 return qca8k_port_fdb_insert(priv, addr, port_mask, vid);
1659 }
1660
1661 static int
qca8k_port_fdb_del(struct dsa_switch * ds,int port,const unsigned char * addr,u16 vid)1662 qca8k_port_fdb_del(struct dsa_switch *ds, int port,
1663 const unsigned char *addr, u16 vid)
1664 {
1665 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1666 u16 port_mask = BIT(port);
1667
1668 if (!vid)
1669 vid = QCA8K_PORT_VID_DEF;
1670
1671 return qca8k_fdb_del(priv, addr, port_mask, vid);
1672 }
1673
1674 static int
qca8k_port_fdb_dump(struct dsa_switch * ds,int port,dsa_fdb_dump_cb_t * cb,void * data)1675 qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
1676 dsa_fdb_dump_cb_t *cb, void *data)
1677 {
1678 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1679 struct qca8k_fdb _fdb = { 0 };
1680 int cnt = QCA8K_NUM_FDB_RECORDS;
1681 bool is_static;
1682 int ret = 0;
1683
1684 mutex_lock(&priv->reg_mutex);
1685 while (cnt-- && !qca8k_fdb_next(priv, &_fdb, port)) {
1686 if (!_fdb.aging)
1687 break;
1688 is_static = (_fdb.aging == QCA8K_ATU_STATUS_STATIC);
1689 ret = cb(_fdb.mac, _fdb.vid, is_static, data);
1690 if (ret)
1691 break;
1692 }
1693 mutex_unlock(&priv->reg_mutex);
1694
1695 return 0;
1696 }
1697
1698 static int
qca8k_port_vlan_filtering(struct dsa_switch * ds,int port,bool vlan_filtering,struct netlink_ext_ack * extack)1699 qca8k_port_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering,
1700 struct netlink_ext_ack *extack)
1701 {
1702 struct qca8k_priv *priv = ds->priv;
1703 int ret;
1704
1705 if (vlan_filtering) {
1706 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1707 QCA8K_PORT_LOOKUP_VLAN_MODE,
1708 QCA8K_PORT_LOOKUP_VLAN_MODE_SECURE);
1709 } else {
1710 ret = qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1711 QCA8K_PORT_LOOKUP_VLAN_MODE,
1712 QCA8K_PORT_LOOKUP_VLAN_MODE_NONE);
1713 }
1714
1715 return ret;
1716 }
1717
1718 static int
qca8k_port_vlan_add(struct dsa_switch * ds,int port,const struct switchdev_obj_port_vlan * vlan,struct netlink_ext_ack * extack)1719 qca8k_port_vlan_add(struct dsa_switch *ds, int port,
1720 const struct switchdev_obj_port_vlan *vlan,
1721 struct netlink_ext_ack *extack)
1722 {
1723 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
1724 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
1725 struct qca8k_priv *priv = ds->priv;
1726 int ret;
1727
1728 ret = qca8k_vlan_add(priv, port, vlan->vid, untagged);
1729 if (ret) {
1730 dev_err(priv->dev, "Failed to add VLAN to port %d (%d)", port, ret);
1731 return ret;
1732 }
1733
1734 if (pvid) {
1735 int shift = 16 * (port % 2);
1736
1737 ret = qca8k_rmw(priv, QCA8K_EGRESS_VLAN(port),
1738 0xfff << shift, vlan->vid << shift);
1739 if (ret)
1740 return ret;
1741
1742 ret = qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(port),
1743 QCA8K_PORT_VLAN_CVID(vlan->vid) |
1744 QCA8K_PORT_VLAN_SVID(vlan->vid));
1745 }
1746
1747 return ret;
1748 }
1749
1750 static int
qca8k_port_vlan_del(struct dsa_switch * ds,int port,const struct switchdev_obj_port_vlan * vlan)1751 qca8k_port_vlan_del(struct dsa_switch *ds, int port,
1752 const struct switchdev_obj_port_vlan *vlan)
1753 {
1754 struct qca8k_priv *priv = ds->priv;
1755 int ret;
1756
1757 ret = qca8k_vlan_del(priv, port, vlan->vid);
1758 if (ret)
1759 dev_err(priv->dev, "Failed to delete VLAN from port %d (%d)", port, ret);
1760
1761 return ret;
1762 }
1763
qca8k_get_phy_flags(struct dsa_switch * ds,int port)1764 static u32 qca8k_get_phy_flags(struct dsa_switch *ds, int port)
1765 {
1766 struct qca8k_priv *priv = ds->priv;
1767
1768 /* Communicate to the phy internal driver the switch revision.
1769 * Based on the switch revision different values needs to be
1770 * set to the dbg and mmd reg on the phy.
1771 * The first 2 bit are used to communicate the switch revision
1772 * to the phy driver.
1773 */
1774 if (port > 0 && port < 6)
1775 return priv->switch_revision;
1776
1777 return 0;
1778 }
1779
1780 static enum dsa_tag_protocol
qca8k_get_tag_protocol(struct dsa_switch * ds,int port,enum dsa_tag_protocol mp)1781 qca8k_get_tag_protocol(struct dsa_switch *ds, int port,
1782 enum dsa_tag_protocol mp)
1783 {
1784 return DSA_TAG_PROTO_QCA;
1785 }
1786
1787 static const struct dsa_switch_ops qca8k_switch_ops = {
1788 .get_tag_protocol = qca8k_get_tag_protocol,
1789 .setup = qca8k_setup,
1790 .get_strings = qca8k_get_strings,
1791 .get_ethtool_stats = qca8k_get_ethtool_stats,
1792 .get_sset_count = qca8k_get_sset_count,
1793 .get_mac_eee = qca8k_get_mac_eee,
1794 .set_mac_eee = qca8k_set_mac_eee,
1795 .port_enable = qca8k_port_enable,
1796 .port_disable = qca8k_port_disable,
1797 .port_change_mtu = qca8k_port_change_mtu,
1798 .port_max_mtu = qca8k_port_max_mtu,
1799 .port_stp_state_set = qca8k_port_stp_state_set,
1800 .port_bridge_join = qca8k_port_bridge_join,
1801 .port_bridge_leave = qca8k_port_bridge_leave,
1802 .port_fdb_add = qca8k_port_fdb_add,
1803 .port_fdb_del = qca8k_port_fdb_del,
1804 .port_fdb_dump = qca8k_port_fdb_dump,
1805 .port_vlan_filtering = qca8k_port_vlan_filtering,
1806 .port_vlan_add = qca8k_port_vlan_add,
1807 .port_vlan_del = qca8k_port_vlan_del,
1808 .phylink_validate = qca8k_phylink_validate,
1809 .phylink_mac_link_state = qca8k_phylink_mac_link_state,
1810 .phylink_mac_config = qca8k_phylink_mac_config,
1811 .phylink_mac_link_down = qca8k_phylink_mac_link_down,
1812 .phylink_mac_link_up = qca8k_phylink_mac_link_up,
1813 .get_phy_flags = qca8k_get_phy_flags,
1814 };
1815
qca8k_read_switch_id(struct qca8k_priv * priv)1816 static int qca8k_read_switch_id(struct qca8k_priv *priv)
1817 {
1818 const struct qca8k_match_data *data;
1819 u32 val;
1820 u8 id;
1821 int ret;
1822
1823 /* get the switches ID from the compatible */
1824 data = of_device_get_match_data(priv->dev);
1825 if (!data)
1826 return -ENODEV;
1827
1828 ret = qca8k_read(priv, QCA8K_REG_MASK_CTRL, &val);
1829 if (ret < 0)
1830 return -ENODEV;
1831
1832 id = QCA8K_MASK_CTRL_DEVICE_ID(val & QCA8K_MASK_CTRL_DEVICE_ID_MASK);
1833 if (id != data->id) {
1834 dev_err(priv->dev, "Switch id detected %x but expected %x", id, data->id);
1835 return -ENODEV;
1836 }
1837
1838 priv->switch_id = id;
1839
1840 /* Save revision to communicate to the internal PHY driver */
1841 priv->switch_revision = (val & QCA8K_MASK_CTRL_REV_ID_MASK);
1842
1843 return 0;
1844 }
1845
1846 static int
qca8k_sw_probe(struct mdio_device * mdiodev)1847 qca8k_sw_probe(struct mdio_device *mdiodev)
1848 {
1849 struct qca8k_priv *priv;
1850 int ret;
1851
1852 /* allocate the private data struct so that we can probe the switches
1853 * ID register
1854 */
1855 priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);
1856 if (!priv)
1857 return -ENOMEM;
1858
1859 priv->bus = mdiodev->bus;
1860 priv->dev = &mdiodev->dev;
1861
1862 priv->reset_gpio = devm_gpiod_get_optional(priv->dev, "reset",
1863 GPIOD_ASIS);
1864 if (IS_ERR(priv->reset_gpio))
1865 return PTR_ERR(priv->reset_gpio);
1866
1867 if (priv->reset_gpio) {
1868 gpiod_set_value_cansleep(priv->reset_gpio, 1);
1869 /* The active low duration must be greater than 10 ms
1870 * and checkpatch.pl wants 20 ms.
1871 */
1872 msleep(20);
1873 gpiod_set_value_cansleep(priv->reset_gpio, 0);
1874 }
1875
1876 /* Check the detected switch id */
1877 ret = qca8k_read_switch_id(priv);
1878 if (ret)
1879 return ret;
1880
1881 priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL);
1882 if (!priv->ds)
1883 return -ENOMEM;
1884
1885 priv->ds->dev = &mdiodev->dev;
1886 priv->ds->num_ports = QCA8K_NUM_PORTS;
1887 priv->ds->priv = priv;
1888 priv->ops = qca8k_switch_ops;
1889 priv->ds->ops = &priv->ops;
1890 mutex_init(&priv->reg_mutex);
1891 dev_set_drvdata(&mdiodev->dev, priv);
1892
1893 return dsa_register_switch(priv->ds);
1894 }
1895
1896 static void
qca8k_sw_remove(struct mdio_device * mdiodev)1897 qca8k_sw_remove(struct mdio_device *mdiodev)
1898 {
1899 struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev);
1900 int i;
1901
1902 if (!priv)
1903 return;
1904
1905 for (i = 0; i < QCA8K_NUM_PORTS; i++)
1906 qca8k_port_set_status(priv, i, 0);
1907
1908 dsa_unregister_switch(priv->ds);
1909
1910 dev_set_drvdata(&mdiodev->dev, NULL);
1911 }
1912
qca8k_sw_shutdown(struct mdio_device * mdiodev)1913 static void qca8k_sw_shutdown(struct mdio_device *mdiodev)
1914 {
1915 struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev);
1916
1917 if (!priv)
1918 return;
1919
1920 dsa_switch_shutdown(priv->ds);
1921
1922 dev_set_drvdata(&mdiodev->dev, NULL);
1923 }
1924
1925 #ifdef CONFIG_PM_SLEEP
1926 static void
qca8k_set_pm(struct qca8k_priv * priv,int enable)1927 qca8k_set_pm(struct qca8k_priv *priv, int enable)
1928 {
1929 int i;
1930
1931 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
1932 if (!priv->port_sts[i].enabled)
1933 continue;
1934
1935 qca8k_port_set_status(priv, i, enable);
1936 }
1937 }
1938
qca8k_suspend(struct device * dev)1939 static int qca8k_suspend(struct device *dev)
1940 {
1941 struct qca8k_priv *priv = dev_get_drvdata(dev);
1942
1943 qca8k_set_pm(priv, 0);
1944
1945 return dsa_switch_suspend(priv->ds);
1946 }
1947
qca8k_resume(struct device * dev)1948 static int qca8k_resume(struct device *dev)
1949 {
1950 struct qca8k_priv *priv = dev_get_drvdata(dev);
1951
1952 qca8k_set_pm(priv, 1);
1953
1954 return dsa_switch_resume(priv->ds);
1955 }
1956 #endif /* CONFIG_PM_SLEEP */
1957
1958 static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
1959 qca8k_suspend, qca8k_resume);
1960
1961 static const struct qca8k_match_data qca832x = {
1962 .id = QCA8K_ID_QCA8327,
1963 };
1964
1965 static const struct qca8k_match_data qca833x = {
1966 .id = QCA8K_ID_QCA8337,
1967 };
1968
1969 static const struct of_device_id qca8k_of_match[] = {
1970 { .compatible = "qca,qca8327", .data = &qca832x },
1971 { .compatible = "qca,qca8334", .data = &qca833x },
1972 { .compatible = "qca,qca8337", .data = &qca833x },
1973 { /* sentinel */ },
1974 };
1975
1976 static struct mdio_driver qca8kmdio_driver = {
1977 .probe = qca8k_sw_probe,
1978 .remove = qca8k_sw_remove,
1979 .shutdown = qca8k_sw_shutdown,
1980 .mdiodrv.driver = {
1981 .name = "qca8k",
1982 .of_match_table = qca8k_of_match,
1983 .pm = &qca8k_pm_ops,
1984 },
1985 };
1986
1987 mdio_module_driver(qca8kmdio_driver);
1988
1989 MODULE_AUTHOR("Mathieu Olivari, John Crispin <john@phrozen.org>");
1990 MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family");
1991 MODULE_LICENSE("GPL v2");
1992 MODULE_ALIAS("platform:qca8k");
1993