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1/*
2 * Copyright (C) 2009 Felix Fietkau <nbd@nbd.name>
3 * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
4 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
5 * Copyright (c) 2016 John Crispin <john@phrozen.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 and
9 * only version 2 as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17#include <linux/module.h>
18#include <linux/phy.h>
19#include <linux/netdevice.h>
20#include <net/dsa.h>
21#include <linux/of_net.h>
22#include <linux/of_platform.h>
23#include <linux/if_bridge.h>
24#include <linux/mdio.h>
25#include <linux/etherdevice.h>
26
27#include "qca8k.h"
28
29#define MIB_DESC(_s, _o, _n) \
30 { \
31 .size = (_s), \
32 .offset = (_o), \
33 .name = (_n), \
34 }
35
36static const struct qca8k_mib_desc ar8327_mib[] = {
37 MIB_DESC(1, 0x00, "RxBroad"),
38 MIB_DESC(1, 0x04, "RxPause"),
39 MIB_DESC(1, 0x08, "RxMulti"),
40 MIB_DESC(1, 0x0c, "RxFcsErr"),
41 MIB_DESC(1, 0x10, "RxAlignErr"),
42 MIB_DESC(1, 0x14, "RxRunt"),
43 MIB_DESC(1, 0x18, "RxFragment"),
44 MIB_DESC(1, 0x1c, "Rx64Byte"),
45 MIB_DESC(1, 0x20, "Rx128Byte"),
46 MIB_DESC(1, 0x24, "Rx256Byte"),
47 MIB_DESC(1, 0x28, "Rx512Byte"),
48 MIB_DESC(1, 0x2c, "Rx1024Byte"),
49 MIB_DESC(1, 0x30, "Rx1518Byte"),
50 MIB_DESC(1, 0x34, "RxMaxByte"),
51 MIB_DESC(1, 0x38, "RxTooLong"),
52 MIB_DESC(2, 0x3c, "RxGoodByte"),
53 MIB_DESC(2, 0x44, "RxBadByte"),
54 MIB_DESC(1, 0x4c, "RxOverFlow"),
55 MIB_DESC(1, 0x50, "Filtered"),
56 MIB_DESC(1, 0x54, "TxBroad"),
57 MIB_DESC(1, 0x58, "TxPause"),
58 MIB_DESC(1, 0x5c, "TxMulti"),
59 MIB_DESC(1, 0x60, "TxUnderRun"),
60 MIB_DESC(1, 0x64, "Tx64Byte"),
61 MIB_DESC(1, 0x68, "Tx128Byte"),
62 MIB_DESC(1, 0x6c, "Tx256Byte"),
63 MIB_DESC(1, 0x70, "Tx512Byte"),
64 MIB_DESC(1, 0x74, "Tx1024Byte"),
65 MIB_DESC(1, 0x78, "Tx1518Byte"),
66 MIB_DESC(1, 0x7c, "TxMaxByte"),
67 MIB_DESC(1, 0x80, "TxOverSize"),
68 MIB_DESC(2, 0x84, "TxByte"),
69 MIB_DESC(1, 0x8c, "TxCollision"),
70 MIB_DESC(1, 0x90, "TxAbortCol"),
71 MIB_DESC(1, 0x94, "TxMultiCol"),
72 MIB_DESC(1, 0x98, "TxSingleCol"),
73 MIB_DESC(1, 0x9c, "TxExcDefer"),
74 MIB_DESC(1, 0xa0, "TxDefer"),
75 MIB_DESC(1, 0xa4, "TxLateCol"),
76};
77
78/* The 32bit switch registers are accessed indirectly. To achieve this we need
79 * to set the page of the register. Track the last page that was set to reduce
80 * mdio writes
81 */
82static u16 qca8k_current_page = 0xffff;
83
84static void
85qca8k_split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
86{
87 regaddr >>= 1;
88 *r1 = regaddr & 0x1e;
89
90 regaddr >>= 5;
91 *r2 = regaddr & 0x7;
92
93 regaddr >>= 3;
94 *page = regaddr & 0x3ff;
95}
96
97static u32
98qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum)
99{
100 u32 val;
101 int ret;
102
103 ret = bus->read(bus, phy_id, regnum);
104 if (ret >= 0) {
105 val = ret;
106 ret = bus->read(bus, phy_id, regnum + 1);
107 val |= ret << 16;
108 }
109
110 if (ret < 0) {
111 dev_err_ratelimited(&bus->dev,
112 "failed to read qca8k 32bit register\n");
113 return ret;
114 }
115
116 return val;
117}
118
119static void
120qca8k_mii_write32(struct mii_bus *bus, int phy_id, u32 regnum, u32 val)
121{
122 u16 lo, hi;
123 int ret;
124
125 lo = val & 0xffff;
126 hi = (u16)(val >> 16);
127
128 ret = bus->write(bus, phy_id, regnum, lo);
129 if (ret >= 0)
130 ret = bus->write(bus, phy_id, regnum + 1, hi);
131 if (ret < 0)
132 dev_err_ratelimited(&bus->dev,
133 "failed to write qca8k 32bit register\n");
134}
135
136static void
137qca8k_set_page(struct mii_bus *bus, u16 page)
138{
139 if (page == qca8k_current_page)
140 return;
141
142 if (bus->write(bus, 0x18, 0, page) < 0)
143 dev_err_ratelimited(&bus->dev,
144 "failed to set qca8k page\n");
145 qca8k_current_page = page;
146}
147
148static u32
149qca8k_read(struct qca8k_priv *priv, u32 reg)
150{
151 u16 r1, r2, page;
152 u32 val;
153
154 qca8k_split_addr(reg, &r1, &r2, &page);
155
156 mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
157
158 qca8k_set_page(priv->bus, page);
159 val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
160
161 mutex_unlock(&priv->bus->mdio_lock);
162
163 return val;
164}
165
166static void
167qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val)
168{
169 u16 r1, r2, page;
170
171 qca8k_split_addr(reg, &r1, &r2, &page);
172
173 mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
174
175 qca8k_set_page(priv->bus, page);
176 qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
177
178 mutex_unlock(&priv->bus->mdio_lock);
179}
180
181static u32
182qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 val)
183{
184 u16 r1, r2, page;
185 u32 ret;
186
187 qca8k_split_addr(reg, &r1, &r2, &page);
188
189 mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
190
191 qca8k_set_page(priv->bus, page);
192 ret = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
193 ret &= ~mask;
194 ret |= val;
195 qca8k_mii_write32(priv->bus, 0x10 | r2, r1, ret);
196
197 mutex_unlock(&priv->bus->mdio_lock);
198
199 return ret;
200}
201
202static void
203qca8k_reg_set(struct qca8k_priv *priv, u32 reg, u32 val)
204{
205 qca8k_rmw(priv, reg, 0, val);
206}
207
208static void
209qca8k_reg_clear(struct qca8k_priv *priv, u32 reg, u32 val)
210{
211 qca8k_rmw(priv, reg, val, 0);
212}
213
214static int
215qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
216{
217 struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
218
219 *val = qca8k_read(priv, reg);
220
221 return 0;
222}
223
224static int
225qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val)
226{
227 struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
228
229 qca8k_write(priv, reg, val);
230
231 return 0;
232}
233
234static const struct regmap_range qca8k_readable_ranges[] = {
235 regmap_reg_range(0x0000, 0x00e4), /* Global control */
236 regmap_reg_range(0x0100, 0x0168), /* EEE control */
237 regmap_reg_range(0x0200, 0x0270), /* Parser control */
238 regmap_reg_range(0x0400, 0x0454), /* ACL */
239 regmap_reg_range(0x0600, 0x0718), /* Lookup */
240 regmap_reg_range(0x0800, 0x0b70), /* QM */
241 regmap_reg_range(0x0c00, 0x0c80), /* PKT */
242 regmap_reg_range(0x0e00, 0x0e98), /* L3 */
243 regmap_reg_range(0x1000, 0x10ac), /* MIB - Port0 */
244 regmap_reg_range(0x1100, 0x11ac), /* MIB - Port1 */
245 regmap_reg_range(0x1200, 0x12ac), /* MIB - Port2 */
246 regmap_reg_range(0x1300, 0x13ac), /* MIB - Port3 */
247 regmap_reg_range(0x1400, 0x14ac), /* MIB - Port4 */
248 regmap_reg_range(0x1500, 0x15ac), /* MIB - Port5 */
249 regmap_reg_range(0x1600, 0x16ac), /* MIB - Port6 */
250
251};
252
253static const struct regmap_access_table qca8k_readable_table = {
254 .yes_ranges = qca8k_readable_ranges,
255 .n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges),
256};
257
258static struct regmap_config qca8k_regmap_config = {
259 .reg_bits = 16,
260 .val_bits = 32,
261 .reg_stride = 4,
262 .max_register = 0x16ac, /* end MIB - Port6 range */
263 .reg_read = qca8k_regmap_read,
264 .reg_write = qca8k_regmap_write,
265 .rd_table = &qca8k_readable_table,
266};
267
268static int
269qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
270{
271 unsigned long timeout;
272
273 timeout = jiffies + msecs_to_jiffies(20);
274
275 /* loop until the busy flag has cleared */
276 do {
277 u32 val = qca8k_read(priv, reg);
278 int busy = val & mask;
279
280 if (!busy)
281 break;
282 cond_resched();
283 } while (!time_after_eq(jiffies, timeout));
284
285 return time_after_eq(jiffies, timeout);
286}
287
288static void
289qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
290{
291 u32 reg[4];
292 int i;
293
294 /* load the ARL table into an array */
295 for (i = 0; i < 4; i++)
296 reg[i] = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4));
297
298 /* vid - 83:72 */
299 fdb->vid = (reg[2] >> QCA8K_ATU_VID_S) & QCA8K_ATU_VID_M;
300 /* aging - 67:64 */
301 fdb->aging = reg[2] & QCA8K_ATU_STATUS_M;
302 /* portmask - 54:48 */
303 fdb->port_mask = (reg[1] >> QCA8K_ATU_PORT_S) & QCA8K_ATU_PORT_M;
304 /* mac - 47:0 */
305 fdb->mac[0] = (reg[1] >> QCA8K_ATU_ADDR0_S) & 0xff;
306 fdb->mac[1] = reg[1] & 0xff;
307 fdb->mac[2] = (reg[0] >> QCA8K_ATU_ADDR2_S) & 0xff;
308 fdb->mac[3] = (reg[0] >> QCA8K_ATU_ADDR3_S) & 0xff;
309 fdb->mac[4] = (reg[0] >> QCA8K_ATU_ADDR4_S) & 0xff;
310 fdb->mac[5] = reg[0] & 0xff;
311}
312
313static void
314qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac,
315 u8 aging)
316{
317 u32 reg[3] = { 0 };
318 int i;
319
320 /* vid - 83:72 */
321 reg[2] = (vid & QCA8K_ATU_VID_M) << QCA8K_ATU_VID_S;
322 /* aging - 67:64 */
323 reg[2] |= aging & QCA8K_ATU_STATUS_M;
324 /* portmask - 54:48 */
325 reg[1] = (port_mask & QCA8K_ATU_PORT_M) << QCA8K_ATU_PORT_S;
326 /* mac - 47:0 */
327 reg[1] |= mac[0] << QCA8K_ATU_ADDR0_S;
328 reg[1] |= mac[1];
329 reg[0] |= mac[2] << QCA8K_ATU_ADDR2_S;
330 reg[0] |= mac[3] << QCA8K_ATU_ADDR3_S;
331 reg[0] |= mac[4] << QCA8K_ATU_ADDR4_S;
332 reg[0] |= mac[5];
333
334 /* load the array into the ARL table */
335 for (i = 0; i < 3; i++)
336 qca8k_write(priv, QCA8K_REG_ATU_DATA0 + (i * 4), reg[i]);
337}
338
339static int
340qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port)
341{
342 u32 reg;
343
344 /* Set the command and FDB index */
345 reg = QCA8K_ATU_FUNC_BUSY;
346 reg |= cmd;
347 if (port >= 0) {
348 reg |= QCA8K_ATU_FUNC_PORT_EN;
349 reg |= (port & QCA8K_ATU_FUNC_PORT_M) << QCA8K_ATU_FUNC_PORT_S;
350 }
351
352 /* Write the function register triggering the table access */
353 qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg);
354
355 /* wait for completion */
356 if (qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY))
357 return -1;
358
359 /* Check for table full violation when adding an entry */
360 if (cmd == QCA8K_FDB_LOAD) {
361 reg = qca8k_read(priv, QCA8K_REG_ATU_FUNC);
362 if (reg & QCA8K_ATU_FUNC_FULL)
363 return -1;
364 }
365
366 return 0;
367}
368
369static int
370qca8k_fdb_next(struct qca8k_priv *priv, struct qca8k_fdb *fdb, int port)
371{
372 int ret;
373
374 qca8k_fdb_write(priv, fdb->vid, fdb->port_mask, fdb->mac, fdb->aging);
375 ret = qca8k_fdb_access(priv, QCA8K_FDB_NEXT, port);
376 if (ret >= 0)
377 qca8k_fdb_read(priv, fdb);
378
379 return ret;
380}
381
382static int
383qca8k_fdb_add(struct qca8k_priv *priv, const u8 *mac, u16 port_mask,
384 u16 vid, u8 aging)
385{
386 int ret;
387
388 mutex_lock(&priv->reg_mutex);
389 qca8k_fdb_write(priv, vid, port_mask, mac, aging);
390 ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1);
391 mutex_unlock(&priv->reg_mutex);
392
393 return ret;
394}
395
396static int
397qca8k_fdb_del(struct qca8k_priv *priv, const u8 *mac, u16 port_mask, u16 vid)
398{
399 int ret;
400
401 mutex_lock(&priv->reg_mutex);
402 qca8k_fdb_write(priv, vid, port_mask, mac, 0);
403 ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1);
404 mutex_unlock(&priv->reg_mutex);
405
406 return ret;
407}
408
409static void
410qca8k_fdb_flush(struct qca8k_priv *priv)
411{
412 mutex_lock(&priv->reg_mutex);
413 qca8k_fdb_access(priv, QCA8K_FDB_FLUSH, -1);
414 mutex_unlock(&priv->reg_mutex);
415}
416
417static void
418qca8k_mib_init(struct qca8k_priv *priv)
419{
420 mutex_lock(&priv->reg_mutex);
421 qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_FLUSH | QCA8K_MIB_BUSY);
422 qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
423 qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
424 qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB);
425 mutex_unlock(&priv->reg_mutex);
426}
427
428static int
429qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode)
430{
431 u32 reg;
432
433 switch (port) {
434 case 0:
435 reg = QCA8K_REG_PORT0_PAD_CTRL;
436 break;
437 case 6:
438 reg = QCA8K_REG_PORT6_PAD_CTRL;
439 break;
440 default:
441 pr_err("Can't set PAD_CTRL on port %d\n", port);
442 return -EINVAL;
443 }
444
445 /* Configure a port to be directly connected to an external
446 * PHY or MAC.
447 */
448 switch (mode) {
449 case PHY_INTERFACE_MODE_RGMII:
450 qca8k_write(priv, reg,
451 QCA8K_PORT_PAD_RGMII_EN |
452 QCA8K_PORT_PAD_RGMII_TX_DELAY(3) |
453 QCA8K_PORT_PAD_RGMII_RX_DELAY(3));
454
455 /* According to the datasheet, RGMII delay is enabled through
456 * PORT5_PAD_CTRL for all ports, rather than individual port
457 * registers
458 */
459 qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL,
460 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
461 break;
462 case PHY_INTERFACE_MODE_SGMII:
463 qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
464 break;
465 default:
466 pr_err("xMII mode %d not supported\n", mode);
467 return -EINVAL;
468 }
469
470 return 0;
471}
472
473static void
474qca8k_port_set_status(struct qca8k_priv *priv, int port, int enable)
475{
476 u32 mask = QCA8K_PORT_STATUS_TXMAC;
477
478 /* Port 0 and 6 have no internal PHY */
479 if ((port > 0) && (port < 6))
480 mask |= QCA8K_PORT_STATUS_LINK_AUTO;
481
482 if (enable)
483 qca8k_reg_set(priv, QCA8K_REG_PORT_STATUS(port), mask);
484 else
485 qca8k_reg_clear(priv, QCA8K_REG_PORT_STATUS(port), mask);
486}
487
488static int
489qca8k_setup(struct dsa_switch *ds)
490{
491 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
492 int ret, i, phy_mode = -1;
493
494 /* Make sure that port 0 is the cpu port */
495 if (!dsa_is_cpu_port(ds, 0)) {
496 pr_err("port 0 is not the CPU port\n");
497 return -EINVAL;
498 }
499
500 mutex_init(&priv->reg_mutex);
501
502 /* Start by setting up the register mapping */
503 priv->regmap = devm_regmap_init(ds->dev, NULL, priv,
504 &qca8k_regmap_config);
505 if (IS_ERR(priv->regmap))
506 pr_warn("regmap initialization failed");
507
508 /* Initialize CPU port pad mode (xMII type, delays...) */
509 phy_mode = of_get_phy_mode(ds->ports[QCA8K_CPU_PORT].dn);
510 if (phy_mode < 0) {
511 pr_err("Can't find phy-mode for master device\n");
512 return phy_mode;
513 }
514 ret = qca8k_set_pad_ctrl(priv, QCA8K_CPU_PORT, phy_mode);
515 if (ret < 0)
516 return ret;
517
518 /* Enable CPU Port */
519 qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0,
520 QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN);
521 qca8k_port_set_status(priv, QCA8K_CPU_PORT, 1);
522 priv->port_sts[QCA8K_CPU_PORT].enabled = 1;
523
524 /* Enable MIB counters */
525 qca8k_mib_init(priv);
526
527 /* Enable QCA header mode on the cpu port */
528 qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT),
529 QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S |
530 QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S);
531
532 /* Disable forwarding by default on all ports */
533 for (i = 0; i < QCA8K_NUM_PORTS; i++)
534 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
535 QCA8K_PORT_LOOKUP_MEMBER, 0);
536
537 /* Disable MAC by default on all user ports */
538 for (i = 1; i < QCA8K_NUM_PORTS; i++)
539 if (dsa_is_user_port(ds, i))
540 qca8k_port_set_status(priv, i, 0);
541
542 /* Forward all unknown frames to CPU port for Linux processing */
543 qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1,
544 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S |
545 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S |
546 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S |
547 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S);
548
549 /* Setup connection between CPU port & user ports */
550 for (i = 0; i < DSA_MAX_PORTS; i++) {
551 /* CPU port gets connected to all user ports of the switch */
552 if (dsa_is_cpu_port(ds, i)) {
553 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(QCA8K_CPU_PORT),
554 QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds));
555 }
556
557 /* Invividual user ports get connected to CPU port only */
558 if (dsa_is_user_port(ds, i)) {
559 int shift = 16 * (i % 2);
560
561 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
562 QCA8K_PORT_LOOKUP_MEMBER,
563 BIT(QCA8K_CPU_PORT));
564
565 /* Enable ARP Auto-learning by default */
566 qca8k_reg_set(priv, QCA8K_PORT_LOOKUP_CTRL(i),
567 QCA8K_PORT_LOOKUP_LEARN);
568
569 /* For port based vlans to work we need to set the
570 * default egress vid
571 */
572 qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i),
573 0xffff << shift, 1 << shift);
574 qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i),
575 QCA8K_PORT_VLAN_CVID(1) |
576 QCA8K_PORT_VLAN_SVID(1));
577 }
578 }
579
580 /* Flush the FDB table */
581 qca8k_fdb_flush(priv);
582
583 return 0;
584}
585
586static int
587qca8k_phy_read(struct dsa_switch *ds, int phy, int regnum)
588{
589 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
590
591 return mdiobus_read(priv->bus, phy, regnum);
592}
593
594static int
595qca8k_phy_write(struct dsa_switch *ds, int phy, int regnum, u16 val)
596{
597 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
598
599 return mdiobus_write(priv->bus, phy, regnum, val);
600}
601
602static void
603qca8k_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
604{
605 int i;
606
607 for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++)
608 strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name,
609 ETH_GSTRING_LEN);
610}
611
612static void
613qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
614 uint64_t *data)
615{
616 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
617 const struct qca8k_mib_desc *mib;
618 u32 reg, i;
619 u64 hi;
620
621 for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
622 mib = &ar8327_mib[i];
623 reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset;
624
625 data[i] = qca8k_read(priv, reg);
626 if (mib->size == 2) {
627 hi = qca8k_read(priv, reg + 4);
628 data[i] |= hi << 32;
629 }
630 }
631}
632
633static int
634qca8k_get_sset_count(struct dsa_switch *ds, int port)
635{
636 return ARRAY_SIZE(ar8327_mib);
637}
638
639static int
640qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee)
641{
642 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
643 u32 lpi_en = QCA8K_REG_EEE_CTRL_LPI_EN(port);
644 u32 reg;
645
646 mutex_lock(&priv->reg_mutex);
647 reg = qca8k_read(priv, QCA8K_REG_EEE_CTRL);
648 if (eee->eee_enabled)
649 reg |= lpi_en;
650 else
651 reg &= ~lpi_en;
652 qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg);
653 mutex_unlock(&priv->reg_mutex);
654
655 return 0;
656}
657
658static int
659qca8k_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
660{
661 /* Nothing to do on the port's MAC */
662 return 0;
663}
664
665static void
666qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
667{
668 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
669 u32 stp_state;
670
671 switch (state) {
672 case BR_STATE_DISABLED:
673 stp_state = QCA8K_PORT_LOOKUP_STATE_DISABLED;
674 break;
675 case BR_STATE_BLOCKING:
676 stp_state = QCA8K_PORT_LOOKUP_STATE_BLOCKING;
677 break;
678 case BR_STATE_LISTENING:
679 stp_state = QCA8K_PORT_LOOKUP_STATE_LISTENING;
680 break;
681 case BR_STATE_LEARNING:
682 stp_state = QCA8K_PORT_LOOKUP_STATE_LEARNING;
683 break;
684 case BR_STATE_FORWARDING:
685 default:
686 stp_state = QCA8K_PORT_LOOKUP_STATE_FORWARD;
687 break;
688 }
689
690 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
691 QCA8K_PORT_LOOKUP_STATE_MASK, stp_state);
692}
693
694static int
695qca8k_port_bridge_join(struct dsa_switch *ds, int port, struct net_device *br)
696{
697 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
698 int port_mask = BIT(QCA8K_CPU_PORT);
699 int i;
700
701 for (i = 1; i < QCA8K_NUM_PORTS; i++) {
702 if (dsa_to_port(ds, i)->bridge_dev != br)
703 continue;
704 /* Add this port to the portvlan mask of the other ports
705 * in the bridge
706 */
707 qca8k_reg_set(priv,
708 QCA8K_PORT_LOOKUP_CTRL(i),
709 BIT(port));
710 if (i != port)
711 port_mask |= BIT(i);
712 }
713 /* Add all other ports to this ports portvlan mask */
714 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
715 QCA8K_PORT_LOOKUP_MEMBER, port_mask);
716
717 return 0;
718}
719
720static void
721qca8k_port_bridge_leave(struct dsa_switch *ds, int port, struct net_device *br)
722{
723 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
724 int i;
725
726 for (i = 1; i < QCA8K_NUM_PORTS; i++) {
727 if (dsa_to_port(ds, i)->bridge_dev != br)
728 continue;
729 /* Remove this port to the portvlan mask of the other ports
730 * in the bridge
731 */
732 qca8k_reg_clear(priv,
733 QCA8K_PORT_LOOKUP_CTRL(i),
734 BIT(port));
735 }
736
737 /* Set the cpu port to be the only one in the portvlan mask of
738 * this port
739 */
740 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
741 QCA8K_PORT_LOOKUP_MEMBER, BIT(QCA8K_CPU_PORT));
742}
743
744static int
745qca8k_port_enable(struct dsa_switch *ds, int port,
746 struct phy_device *phy)
747{
748 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
749
750 qca8k_port_set_status(priv, port, 1);
751 priv->port_sts[port].enabled = 1;
752
753 return 0;
754}
755
756static void
757qca8k_port_disable(struct dsa_switch *ds, int port,
758 struct phy_device *phy)
759{
760 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
761
762 qca8k_port_set_status(priv, port, 0);
763 priv->port_sts[port].enabled = 0;
764}
765
766static int
767qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
768 u16 port_mask, u16 vid)
769{
770 /* Set the vid to the port vlan id if no vid is set */
771 if (!vid)
772 vid = 1;
773
774 return qca8k_fdb_add(priv, addr, port_mask, vid,
775 QCA8K_ATU_STATUS_STATIC);
776}
777
778static int
779qca8k_port_fdb_add(struct dsa_switch *ds, int port,
780 const unsigned char *addr, u16 vid)
781{
782 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
783 u16 port_mask = BIT(port);
784
785 return qca8k_port_fdb_insert(priv, addr, port_mask, vid);
786}
787
788static int
789qca8k_port_fdb_del(struct dsa_switch *ds, int port,
790 const unsigned char *addr, u16 vid)
791{
792 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
793 u16 port_mask = BIT(port);
794
795 if (!vid)
796 vid = 1;
797
798 return qca8k_fdb_del(priv, addr, port_mask, vid);
799}
800
801static int
802qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
803 dsa_fdb_dump_cb_t *cb, void *data)
804{
805 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
806 struct qca8k_fdb _fdb = { 0 };
807 int cnt = QCA8K_NUM_FDB_RECORDS;
808 bool is_static;
809 int ret = 0;
810
811 mutex_lock(&priv->reg_mutex);
812 while (cnt-- && !qca8k_fdb_next(priv, &_fdb, port)) {
813 if (!_fdb.aging)
814 break;
815 is_static = (_fdb.aging == QCA8K_ATU_STATUS_STATIC);
816 ret = cb(_fdb.mac, _fdb.vid, is_static, data);
817 if (ret)
818 break;
819 }
820 mutex_unlock(&priv->reg_mutex);
821
822 return 0;
823}
824
825static enum dsa_tag_protocol
826qca8k_get_tag_protocol(struct dsa_switch *ds, int port)
827{
828 return DSA_TAG_PROTO_QCA;
829}
830
831static const struct dsa_switch_ops qca8k_switch_ops = {
832 .get_tag_protocol = qca8k_get_tag_protocol,
833 .setup = qca8k_setup,
834 .get_strings = qca8k_get_strings,
835 .phy_read = qca8k_phy_read,
836 .phy_write = qca8k_phy_write,
837 .get_ethtool_stats = qca8k_get_ethtool_stats,
838 .get_sset_count = qca8k_get_sset_count,
839 .get_mac_eee = qca8k_get_mac_eee,
840 .set_mac_eee = qca8k_set_mac_eee,
841 .port_enable = qca8k_port_enable,
842 .port_disable = qca8k_port_disable,
843 .port_stp_state_set = qca8k_port_stp_state_set,
844 .port_bridge_join = qca8k_port_bridge_join,
845 .port_bridge_leave = qca8k_port_bridge_leave,
846 .port_fdb_add = qca8k_port_fdb_add,
847 .port_fdb_del = qca8k_port_fdb_del,
848 .port_fdb_dump = qca8k_port_fdb_dump,
849};
850
851static int
852qca8k_sw_probe(struct mdio_device *mdiodev)
853{
854 struct qca8k_priv *priv;
855 u32 id;
856
857 /* allocate the private data struct so that we can probe the switches
858 * ID register
859 */
860 priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);
861 if (!priv)
862 return -ENOMEM;
863
864 priv->bus = mdiodev->bus;
865
866 /* read the switches ID register */
867 id = qca8k_read(priv, QCA8K_REG_MASK_CTRL);
868 id >>= QCA8K_MASK_CTRL_ID_S;
869 id &= QCA8K_MASK_CTRL_ID_M;
870 if (id != QCA8K_ID_QCA8337)
871 return -ENODEV;
872
873 priv->ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS);
874 if (!priv->ds)
875 return -ENOMEM;
876
877 priv->ds->priv = priv;
878 priv->ds->ops = &qca8k_switch_ops;
879 mutex_init(&priv->reg_mutex);
880 dev_set_drvdata(&mdiodev->dev, priv);
881
882 return dsa_register_switch(priv->ds);
883}
884
885static void
886qca8k_sw_remove(struct mdio_device *mdiodev)
887{
888 struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev);
889 int i;
890
891 for (i = 0; i < QCA8K_NUM_PORTS; i++)
892 qca8k_port_set_status(priv, i, 0);
893
894 dsa_unregister_switch(priv->ds);
895}
896
897#ifdef CONFIG_PM_SLEEP
898static void
899qca8k_set_pm(struct qca8k_priv *priv, int enable)
900{
901 int i;
902
903 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
904 if (!priv->port_sts[i].enabled)
905 continue;
906
907 qca8k_port_set_status(priv, i, enable);
908 }
909}
910
911static int qca8k_suspend(struct device *dev)
912{
913 struct platform_device *pdev = to_platform_device(dev);
914 struct qca8k_priv *priv = platform_get_drvdata(pdev);
915
916 qca8k_set_pm(priv, 0);
917
918 return dsa_switch_suspend(priv->ds);
919}
920
921static int qca8k_resume(struct device *dev)
922{
923 struct platform_device *pdev = to_platform_device(dev);
924 struct qca8k_priv *priv = platform_get_drvdata(pdev);
925
926 qca8k_set_pm(priv, 1);
927
928 return dsa_switch_resume(priv->ds);
929}
930#endif /* CONFIG_PM_SLEEP */
931
932static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
933 qca8k_suspend, qca8k_resume);
934
935static const struct of_device_id qca8k_of_match[] = {
936 { .compatible = "qca,qca8337" },
937 { /* sentinel */ },
938};
939
940static struct mdio_driver qca8kmdio_driver = {
941 .probe = qca8k_sw_probe,
942 .remove = qca8k_sw_remove,
943 .mdiodrv.driver = {
944 .name = "qca8k",
945 .of_match_table = qca8k_of_match,
946 .pm = &qca8k_pm_ops,
947 },
948};
949
950mdio_module_driver(qca8kmdio_driver);
951
952MODULE_AUTHOR("Mathieu Olivari, John Crispin <john@phrozen.org>");
953MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family");
954MODULE_LICENSE("GPL v2");
955MODULE_ALIAS("platform:qca8k");
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_platform.h>
15#include <linux/if_bridge.h>
16#include <linux/mdio.h>
17#include <linux/phylink.h>
18#include <linux/gpio/consumer.h>
19#include <linux/etherdevice.h>
20
21#include "qca8k.h"
22
23#define MIB_DESC(_s, _o, _n) \
24 { \
25 .size = (_s), \
26 .offset = (_o), \
27 .name = (_n), \
28 }
29
30static const struct qca8k_mib_desc ar8327_mib[] = {
31 MIB_DESC(1, 0x00, "RxBroad"),
32 MIB_DESC(1, 0x04, "RxPause"),
33 MIB_DESC(1, 0x08, "RxMulti"),
34 MIB_DESC(1, 0x0c, "RxFcsErr"),
35 MIB_DESC(1, 0x10, "RxAlignErr"),
36 MIB_DESC(1, 0x14, "RxRunt"),
37 MIB_DESC(1, 0x18, "RxFragment"),
38 MIB_DESC(1, 0x1c, "Rx64Byte"),
39 MIB_DESC(1, 0x20, "Rx128Byte"),
40 MIB_DESC(1, 0x24, "Rx256Byte"),
41 MIB_DESC(1, 0x28, "Rx512Byte"),
42 MIB_DESC(1, 0x2c, "Rx1024Byte"),
43 MIB_DESC(1, 0x30, "Rx1518Byte"),
44 MIB_DESC(1, 0x34, "RxMaxByte"),
45 MIB_DESC(1, 0x38, "RxTooLong"),
46 MIB_DESC(2, 0x3c, "RxGoodByte"),
47 MIB_DESC(2, 0x44, "RxBadByte"),
48 MIB_DESC(1, 0x4c, "RxOverFlow"),
49 MIB_DESC(1, 0x50, "Filtered"),
50 MIB_DESC(1, 0x54, "TxBroad"),
51 MIB_DESC(1, 0x58, "TxPause"),
52 MIB_DESC(1, 0x5c, "TxMulti"),
53 MIB_DESC(1, 0x60, "TxUnderRun"),
54 MIB_DESC(1, 0x64, "Tx64Byte"),
55 MIB_DESC(1, 0x68, "Tx128Byte"),
56 MIB_DESC(1, 0x6c, "Tx256Byte"),
57 MIB_DESC(1, 0x70, "Tx512Byte"),
58 MIB_DESC(1, 0x74, "Tx1024Byte"),
59 MIB_DESC(1, 0x78, "Tx1518Byte"),
60 MIB_DESC(1, 0x7c, "TxMaxByte"),
61 MIB_DESC(1, 0x80, "TxOverSize"),
62 MIB_DESC(2, 0x84, "TxByte"),
63 MIB_DESC(1, 0x8c, "TxCollision"),
64 MIB_DESC(1, 0x90, "TxAbortCol"),
65 MIB_DESC(1, 0x94, "TxMultiCol"),
66 MIB_DESC(1, 0x98, "TxSingleCol"),
67 MIB_DESC(1, 0x9c, "TxExcDefer"),
68 MIB_DESC(1, 0xa0, "TxDefer"),
69 MIB_DESC(1, 0xa4, "TxLateCol"),
70};
71
72/* The 32bit switch registers are accessed indirectly. To achieve this we need
73 * to set the page of the register. Track the last page that was set to reduce
74 * mdio writes
75 */
76static u16 qca8k_current_page = 0xffff;
77
78static void
79qca8k_split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
80{
81 regaddr >>= 1;
82 *r1 = regaddr & 0x1e;
83
84 regaddr >>= 5;
85 *r2 = regaddr & 0x7;
86
87 regaddr >>= 3;
88 *page = regaddr & 0x3ff;
89}
90
91static u32
92qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum)
93{
94 u32 val;
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 return ret;
108 }
109
110 return val;
111}
112
113static void
114qca8k_mii_write32(struct mii_bus *bus, int phy_id, u32 regnum, u32 val)
115{
116 u16 lo, hi;
117 int ret;
118
119 lo = val & 0xffff;
120 hi = (u16)(val >> 16);
121
122 ret = bus->write(bus, phy_id, regnum, lo);
123 if (ret >= 0)
124 ret = bus->write(bus, phy_id, regnum + 1, hi);
125 if (ret < 0)
126 dev_err_ratelimited(&bus->dev,
127 "failed to write qca8k 32bit register\n");
128}
129
130static void
131qca8k_set_page(struct mii_bus *bus, u16 page)
132{
133 if (page == qca8k_current_page)
134 return;
135
136 if (bus->write(bus, 0x18, 0, page) < 0)
137 dev_err_ratelimited(&bus->dev,
138 "failed to set qca8k page\n");
139 qca8k_current_page = page;
140}
141
142static u32
143qca8k_read(struct qca8k_priv *priv, u32 reg)
144{
145 u16 r1, r2, page;
146 u32 val;
147
148 qca8k_split_addr(reg, &r1, &r2, &page);
149
150 mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
151
152 qca8k_set_page(priv->bus, page);
153 val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
154
155 mutex_unlock(&priv->bus->mdio_lock);
156
157 return val;
158}
159
160static void
161qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val)
162{
163 u16 r1, r2, page;
164
165 qca8k_split_addr(reg, &r1, &r2, &page);
166
167 mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
168
169 qca8k_set_page(priv->bus, page);
170 qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
171
172 mutex_unlock(&priv->bus->mdio_lock);
173}
174
175static u32
176qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 val)
177{
178 u16 r1, r2, page;
179 u32 ret;
180
181 qca8k_split_addr(reg, &r1, &r2, &page);
182
183 mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
184
185 qca8k_set_page(priv->bus, page);
186 ret = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
187 ret &= ~mask;
188 ret |= val;
189 qca8k_mii_write32(priv->bus, 0x10 | r2, r1, ret);
190
191 mutex_unlock(&priv->bus->mdio_lock);
192
193 return ret;
194}
195
196static void
197qca8k_reg_set(struct qca8k_priv *priv, u32 reg, u32 val)
198{
199 qca8k_rmw(priv, reg, 0, val);
200}
201
202static void
203qca8k_reg_clear(struct qca8k_priv *priv, u32 reg, u32 val)
204{
205 qca8k_rmw(priv, reg, val, 0);
206}
207
208static int
209qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
210{
211 struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
212
213 *val = qca8k_read(priv, reg);
214
215 return 0;
216}
217
218static int
219qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val)
220{
221 struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
222
223 qca8k_write(priv, reg, val);
224
225 return 0;
226}
227
228static const struct regmap_range qca8k_readable_ranges[] = {
229 regmap_reg_range(0x0000, 0x00e4), /* Global control */
230 regmap_reg_range(0x0100, 0x0168), /* EEE control */
231 regmap_reg_range(0x0200, 0x0270), /* Parser control */
232 regmap_reg_range(0x0400, 0x0454), /* ACL */
233 regmap_reg_range(0x0600, 0x0718), /* Lookup */
234 regmap_reg_range(0x0800, 0x0b70), /* QM */
235 regmap_reg_range(0x0c00, 0x0c80), /* PKT */
236 regmap_reg_range(0x0e00, 0x0e98), /* L3 */
237 regmap_reg_range(0x1000, 0x10ac), /* MIB - Port0 */
238 regmap_reg_range(0x1100, 0x11ac), /* MIB - Port1 */
239 regmap_reg_range(0x1200, 0x12ac), /* MIB - Port2 */
240 regmap_reg_range(0x1300, 0x13ac), /* MIB - Port3 */
241 regmap_reg_range(0x1400, 0x14ac), /* MIB - Port4 */
242 regmap_reg_range(0x1500, 0x15ac), /* MIB - Port5 */
243 regmap_reg_range(0x1600, 0x16ac), /* MIB - Port6 */
244
245};
246
247static const struct regmap_access_table qca8k_readable_table = {
248 .yes_ranges = qca8k_readable_ranges,
249 .n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges),
250};
251
252static struct regmap_config qca8k_regmap_config = {
253 .reg_bits = 16,
254 .val_bits = 32,
255 .reg_stride = 4,
256 .max_register = 0x16ac, /* end MIB - Port6 range */
257 .reg_read = qca8k_regmap_read,
258 .reg_write = qca8k_regmap_write,
259 .rd_table = &qca8k_readable_table,
260};
261
262static int
263qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
264{
265 unsigned long timeout;
266
267 timeout = jiffies + msecs_to_jiffies(20);
268
269 /* loop until the busy flag has cleared */
270 do {
271 u32 val = qca8k_read(priv, reg);
272 int busy = val & mask;
273
274 if (!busy)
275 break;
276 cond_resched();
277 } while (!time_after_eq(jiffies, timeout));
278
279 return time_after_eq(jiffies, timeout);
280}
281
282static void
283qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
284{
285 u32 reg[4];
286 int i;
287
288 /* load the ARL table into an array */
289 for (i = 0; i < 4; i++)
290 reg[i] = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4));
291
292 /* vid - 83:72 */
293 fdb->vid = (reg[2] >> QCA8K_ATU_VID_S) & QCA8K_ATU_VID_M;
294 /* aging - 67:64 */
295 fdb->aging = reg[2] & QCA8K_ATU_STATUS_M;
296 /* portmask - 54:48 */
297 fdb->port_mask = (reg[1] >> QCA8K_ATU_PORT_S) & QCA8K_ATU_PORT_M;
298 /* mac - 47:0 */
299 fdb->mac[0] = (reg[1] >> QCA8K_ATU_ADDR0_S) & 0xff;
300 fdb->mac[1] = reg[1] & 0xff;
301 fdb->mac[2] = (reg[0] >> QCA8K_ATU_ADDR2_S) & 0xff;
302 fdb->mac[3] = (reg[0] >> QCA8K_ATU_ADDR3_S) & 0xff;
303 fdb->mac[4] = (reg[0] >> QCA8K_ATU_ADDR4_S) & 0xff;
304 fdb->mac[5] = reg[0] & 0xff;
305}
306
307static void
308qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac,
309 u8 aging)
310{
311 u32 reg[3] = { 0 };
312 int i;
313
314 /* vid - 83:72 */
315 reg[2] = (vid & QCA8K_ATU_VID_M) << QCA8K_ATU_VID_S;
316 /* aging - 67:64 */
317 reg[2] |= aging & QCA8K_ATU_STATUS_M;
318 /* portmask - 54:48 */
319 reg[1] = (port_mask & QCA8K_ATU_PORT_M) << QCA8K_ATU_PORT_S;
320 /* mac - 47:0 */
321 reg[1] |= mac[0] << QCA8K_ATU_ADDR0_S;
322 reg[1] |= mac[1];
323 reg[0] |= mac[2] << QCA8K_ATU_ADDR2_S;
324 reg[0] |= mac[3] << QCA8K_ATU_ADDR3_S;
325 reg[0] |= mac[4] << QCA8K_ATU_ADDR4_S;
326 reg[0] |= mac[5];
327
328 /* load the array into the ARL table */
329 for (i = 0; i < 3; i++)
330 qca8k_write(priv, QCA8K_REG_ATU_DATA0 + (i * 4), reg[i]);
331}
332
333static int
334qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port)
335{
336 u32 reg;
337
338 /* Set the command and FDB index */
339 reg = QCA8K_ATU_FUNC_BUSY;
340 reg |= cmd;
341 if (port >= 0) {
342 reg |= QCA8K_ATU_FUNC_PORT_EN;
343 reg |= (port & QCA8K_ATU_FUNC_PORT_M) << QCA8K_ATU_FUNC_PORT_S;
344 }
345
346 /* Write the function register triggering the table access */
347 qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg);
348
349 /* wait for completion */
350 if (qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY))
351 return -1;
352
353 /* Check for table full violation when adding an entry */
354 if (cmd == QCA8K_FDB_LOAD) {
355 reg = qca8k_read(priv, QCA8K_REG_ATU_FUNC);
356 if (reg & QCA8K_ATU_FUNC_FULL)
357 return -1;
358 }
359
360 return 0;
361}
362
363static int
364qca8k_fdb_next(struct qca8k_priv *priv, struct qca8k_fdb *fdb, int port)
365{
366 int ret;
367
368 qca8k_fdb_write(priv, fdb->vid, fdb->port_mask, fdb->mac, fdb->aging);
369 ret = qca8k_fdb_access(priv, QCA8K_FDB_NEXT, port);
370 if (ret >= 0)
371 qca8k_fdb_read(priv, fdb);
372
373 return ret;
374}
375
376static int
377qca8k_fdb_add(struct qca8k_priv *priv, const u8 *mac, u16 port_mask,
378 u16 vid, u8 aging)
379{
380 int ret;
381
382 mutex_lock(&priv->reg_mutex);
383 qca8k_fdb_write(priv, vid, port_mask, mac, aging);
384 ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1);
385 mutex_unlock(&priv->reg_mutex);
386
387 return ret;
388}
389
390static int
391qca8k_fdb_del(struct qca8k_priv *priv, const u8 *mac, u16 port_mask, u16 vid)
392{
393 int ret;
394
395 mutex_lock(&priv->reg_mutex);
396 qca8k_fdb_write(priv, vid, port_mask, mac, 0);
397 ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1);
398 mutex_unlock(&priv->reg_mutex);
399
400 return ret;
401}
402
403static void
404qca8k_fdb_flush(struct qca8k_priv *priv)
405{
406 mutex_lock(&priv->reg_mutex);
407 qca8k_fdb_access(priv, QCA8K_FDB_FLUSH, -1);
408 mutex_unlock(&priv->reg_mutex);
409}
410
411static int
412qca8k_vlan_access(struct qca8k_priv *priv, enum qca8k_vlan_cmd cmd, u16 vid)
413{
414 u32 reg;
415
416 /* Set the command and VLAN index */
417 reg = QCA8K_VTU_FUNC1_BUSY;
418 reg |= cmd;
419 reg |= vid << QCA8K_VTU_FUNC1_VID_S;
420
421 /* Write the function register triggering the table access */
422 qca8k_write(priv, QCA8K_REG_VTU_FUNC1, reg);
423
424 /* wait for completion */
425 if (qca8k_busy_wait(priv, QCA8K_REG_VTU_FUNC1, QCA8K_VTU_FUNC1_BUSY))
426 return -ETIMEDOUT;
427
428 /* Check for table full violation when adding an entry */
429 if (cmd == QCA8K_VLAN_LOAD) {
430 reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC1);
431 if (reg & QCA8K_VTU_FUNC1_FULL)
432 return -ENOMEM;
433 }
434
435 return 0;
436}
437
438static int
439qca8k_vlan_add(struct qca8k_priv *priv, u8 port, u16 vid, bool untagged)
440{
441 u32 reg;
442 int ret;
443
444 /*
445 We do the right thing with VLAN 0 and treat it as untagged while
446 preserving the tag on egress.
447 */
448 if (vid == 0)
449 return 0;
450
451 mutex_lock(&priv->reg_mutex);
452 ret = qca8k_vlan_access(priv, QCA8K_VLAN_READ, vid);
453 if (ret < 0)
454 goto out;
455
456 reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
457 reg |= QCA8K_VTU_FUNC0_VALID | QCA8K_VTU_FUNC0_IVL_EN;
458 reg &= ~(QCA8K_VTU_FUNC0_EG_MODE_MASK << QCA8K_VTU_FUNC0_EG_MODE_S(port));
459 if (untagged)
460 reg |= QCA8K_VTU_FUNC0_EG_MODE_UNTAG <<
461 QCA8K_VTU_FUNC0_EG_MODE_S(port);
462 else
463 reg |= QCA8K_VTU_FUNC0_EG_MODE_TAG <<
464 QCA8K_VTU_FUNC0_EG_MODE_S(port);
465
466 qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
467 ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
468
469out:
470 mutex_unlock(&priv->reg_mutex);
471
472 return ret;
473}
474
475static int
476qca8k_vlan_del(struct qca8k_priv *priv, u8 port, u16 vid)
477{
478 u32 reg, mask;
479 int ret, i;
480 bool del;
481
482 mutex_lock(&priv->reg_mutex);
483 ret = qca8k_vlan_access(priv, QCA8K_VLAN_READ, vid);
484 if (ret < 0)
485 goto out;
486
487 reg = qca8k_read(priv, QCA8K_REG_VTU_FUNC0);
488 reg &= ~(3 << QCA8K_VTU_FUNC0_EG_MODE_S(port));
489 reg |= QCA8K_VTU_FUNC0_EG_MODE_NOT <<
490 QCA8K_VTU_FUNC0_EG_MODE_S(port);
491
492 /* Check if we're the last member to be removed */
493 del = true;
494 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
495 mask = QCA8K_VTU_FUNC0_EG_MODE_NOT;
496 mask <<= QCA8K_VTU_FUNC0_EG_MODE_S(i);
497
498 if ((reg & mask) != mask) {
499 del = false;
500 break;
501 }
502 }
503
504 if (del) {
505 ret = qca8k_vlan_access(priv, QCA8K_VLAN_PURGE, vid);
506 } else {
507 qca8k_write(priv, QCA8K_REG_VTU_FUNC0, reg);
508 ret = qca8k_vlan_access(priv, QCA8K_VLAN_LOAD, vid);
509 }
510
511out:
512 mutex_unlock(&priv->reg_mutex);
513
514 return ret;
515}
516
517static void
518qca8k_mib_init(struct qca8k_priv *priv)
519{
520 mutex_lock(&priv->reg_mutex);
521 qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_FLUSH | QCA8K_MIB_BUSY);
522 qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
523 qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
524 qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB);
525 mutex_unlock(&priv->reg_mutex);
526}
527
528static void
529qca8k_port_set_status(struct qca8k_priv *priv, int port, int enable)
530{
531 u32 mask = QCA8K_PORT_STATUS_TXMAC | QCA8K_PORT_STATUS_RXMAC;
532
533 /* Port 0 and 6 have no internal PHY */
534 if (port > 0 && port < 6)
535 mask |= QCA8K_PORT_STATUS_LINK_AUTO;
536
537 if (enable)
538 qca8k_reg_set(priv, QCA8K_REG_PORT_STATUS(port), mask);
539 else
540 qca8k_reg_clear(priv, QCA8K_REG_PORT_STATUS(port), mask);
541}
542
543static u32
544qca8k_port_to_phy(int port)
545{
546 /* From Andrew Lunn:
547 * Port 0 has no internal phy.
548 * Port 1 has an internal PHY at MDIO address 0.
549 * Port 2 has an internal PHY at MDIO address 1.
550 * ...
551 * Port 5 has an internal PHY at MDIO address 4.
552 * Port 6 has no internal PHY.
553 */
554
555 return port - 1;
556}
557
558static int
559qca8k_mdio_write(struct qca8k_priv *priv, int port, u32 regnum, u16 data)
560{
561 u32 phy, val;
562
563 if (regnum >= QCA8K_MDIO_MASTER_MAX_REG)
564 return -EINVAL;
565
566 /* callee is responsible for not passing bad ports,
567 * but we still would like to make spills impossible.
568 */
569 phy = qca8k_port_to_phy(port) % PHY_MAX_ADDR;
570 val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN |
571 QCA8K_MDIO_MASTER_WRITE | QCA8K_MDIO_MASTER_PHY_ADDR(phy) |
572 QCA8K_MDIO_MASTER_REG_ADDR(regnum) |
573 QCA8K_MDIO_MASTER_DATA(data);
574
575 qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val);
576
577 return qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
578 QCA8K_MDIO_MASTER_BUSY);
579}
580
581static int
582qca8k_mdio_read(struct qca8k_priv *priv, int port, u32 regnum)
583{
584 u32 phy, val;
585
586 if (regnum >= QCA8K_MDIO_MASTER_MAX_REG)
587 return -EINVAL;
588
589 /* callee is responsible for not passing bad ports,
590 * but we still would like to make spills impossible.
591 */
592 phy = qca8k_port_to_phy(port) % PHY_MAX_ADDR;
593 val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN |
594 QCA8K_MDIO_MASTER_READ | QCA8K_MDIO_MASTER_PHY_ADDR(phy) |
595 QCA8K_MDIO_MASTER_REG_ADDR(regnum);
596
597 qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val);
598
599 if (qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
600 QCA8K_MDIO_MASTER_BUSY))
601 return -ETIMEDOUT;
602
603 val = (qca8k_read(priv, QCA8K_MDIO_MASTER_CTRL) &
604 QCA8K_MDIO_MASTER_DATA_MASK);
605
606 return val;
607}
608
609static int
610qca8k_phy_write(struct dsa_switch *ds, int port, int regnum, u16 data)
611{
612 struct qca8k_priv *priv = ds->priv;
613
614 return qca8k_mdio_write(priv, port, regnum, data);
615}
616
617static int
618qca8k_phy_read(struct dsa_switch *ds, int port, int regnum)
619{
620 struct qca8k_priv *priv = ds->priv;
621 int ret;
622
623 ret = qca8k_mdio_read(priv, port, regnum);
624
625 if (ret < 0)
626 return 0xffff;
627
628 return ret;
629}
630
631static int
632qca8k_setup_mdio_bus(struct qca8k_priv *priv)
633{
634 u32 internal_mdio_mask = 0, external_mdio_mask = 0, reg;
635 struct device_node *ports, *port;
636 int err;
637
638 ports = of_get_child_by_name(priv->dev->of_node, "ports");
639 if (!ports)
640 return -EINVAL;
641
642 for_each_available_child_of_node(ports, port) {
643 err = of_property_read_u32(port, "reg", ®);
644 if (err) {
645 of_node_put(port);
646 of_node_put(ports);
647 return err;
648 }
649
650 if (!dsa_is_user_port(priv->ds, reg))
651 continue;
652
653 if (of_property_read_bool(port, "phy-handle"))
654 external_mdio_mask |= BIT(reg);
655 else
656 internal_mdio_mask |= BIT(reg);
657 }
658
659 of_node_put(ports);
660 if (!external_mdio_mask && !internal_mdio_mask) {
661 dev_err(priv->dev, "no PHYs are defined.\n");
662 return -EINVAL;
663 }
664
665 /* The QCA8K_MDIO_MASTER_EN Bit, which grants access to PHYs through
666 * the MDIO_MASTER register also _disconnects_ the external MDC
667 * passthrough to the internal PHYs. It's not possible to use both
668 * configurations at the same time!
669 *
670 * Because this came up during the review process:
671 * If the external mdio-bus driver is capable magically disabling
672 * the QCA8K_MDIO_MASTER_EN and mutex/spin-locking out the qca8k's
673 * accessors for the time being, it would be possible to pull this
674 * off.
675 */
676 if (!!external_mdio_mask && !!internal_mdio_mask) {
677 dev_err(priv->dev, "either internal or external mdio bus configuration is supported.\n");
678 return -EINVAL;
679 }
680
681 if (external_mdio_mask) {
682 /* Make sure to disable the internal mdio bus in cases
683 * a dt-overlay and driver reload changed the configuration
684 */
685
686 qca8k_reg_clear(priv, QCA8K_MDIO_MASTER_CTRL,
687 QCA8K_MDIO_MASTER_EN);
688 return 0;
689 }
690
691 priv->ops.phy_read = qca8k_phy_read;
692 priv->ops.phy_write = qca8k_phy_write;
693 return 0;
694}
695
696static int
697qca8k_setup(struct dsa_switch *ds)
698{
699 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
700 int ret, i;
701
702 /* Make sure that port 0 is the cpu port */
703 if (!dsa_is_cpu_port(ds, 0)) {
704 pr_err("port 0 is not the CPU port\n");
705 return -EINVAL;
706 }
707
708 mutex_init(&priv->reg_mutex);
709
710 /* Start by setting up the register mapping */
711 priv->regmap = devm_regmap_init(ds->dev, NULL, priv,
712 &qca8k_regmap_config);
713 if (IS_ERR(priv->regmap))
714 pr_warn("regmap initialization failed");
715
716 ret = qca8k_setup_mdio_bus(priv);
717 if (ret)
718 return ret;
719
720 /* Enable CPU Port */
721 qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0,
722 QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN);
723
724 /* Enable MIB counters */
725 qca8k_mib_init(priv);
726
727 /* Enable QCA header mode on the cpu port */
728 qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT),
729 QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S |
730 QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S);
731
732 /* Disable forwarding by default on all ports */
733 for (i = 0; i < QCA8K_NUM_PORTS; i++)
734 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
735 QCA8K_PORT_LOOKUP_MEMBER, 0);
736
737 /* Disable MAC by default on all ports */
738 for (i = 1; i < QCA8K_NUM_PORTS; i++)
739 qca8k_port_set_status(priv, i, 0);
740
741 /* Forward all unknown frames to CPU port for Linux processing */
742 qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1,
743 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S |
744 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S |
745 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S |
746 BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S);
747
748 /* Setup connection between CPU port & user ports */
749 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
750 /* CPU port gets connected to all user ports of the switch */
751 if (dsa_is_cpu_port(ds, i)) {
752 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(QCA8K_CPU_PORT),
753 QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds));
754 }
755
756 /* Individual user ports get connected to CPU port only */
757 if (dsa_is_user_port(ds, i)) {
758 int shift = 16 * (i % 2);
759
760 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
761 QCA8K_PORT_LOOKUP_MEMBER,
762 BIT(QCA8K_CPU_PORT));
763
764 /* Enable ARP Auto-learning by default */
765 qca8k_reg_set(priv, QCA8K_PORT_LOOKUP_CTRL(i),
766 QCA8K_PORT_LOOKUP_LEARN);
767
768 /* For port based vlans to work we need to set the
769 * default egress vid
770 */
771 qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i),
772 0xfff << shift,
773 QCA8K_PORT_VID_DEF << shift);
774 qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i),
775 QCA8K_PORT_VLAN_CVID(QCA8K_PORT_VID_DEF) |
776 QCA8K_PORT_VLAN_SVID(QCA8K_PORT_VID_DEF));
777 }
778 }
779
780 /* Setup our port MTUs to match power on defaults */
781 for (i = 0; i < QCA8K_NUM_PORTS; i++)
782 priv->port_mtu[i] = ETH_FRAME_LEN + ETH_FCS_LEN;
783 qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, ETH_FRAME_LEN + ETH_FCS_LEN);
784
785 /* Flush the FDB table */
786 qca8k_fdb_flush(priv);
787
788 /* We don't have interrupts for link changes, so we need to poll */
789 ds->pcs_poll = true;
790
791 return 0;
792}
793
794static void
795qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
796 const struct phylink_link_state *state)
797{
798 struct qca8k_priv *priv = ds->priv;
799 u32 reg, val;
800
801 switch (port) {
802 case 0: /* 1st CPU port */
803 if (state->interface != PHY_INTERFACE_MODE_RGMII &&
804 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
805 state->interface != PHY_INTERFACE_MODE_SGMII)
806 return;
807
808 reg = QCA8K_REG_PORT0_PAD_CTRL;
809 break;
810 case 1:
811 case 2:
812 case 3:
813 case 4:
814 case 5:
815 /* Internal PHY, nothing to do */
816 return;
817 case 6: /* 2nd CPU port / external PHY */
818 if (state->interface != PHY_INTERFACE_MODE_RGMII &&
819 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
820 state->interface != PHY_INTERFACE_MODE_SGMII &&
821 state->interface != PHY_INTERFACE_MODE_1000BASEX)
822 return;
823
824 reg = QCA8K_REG_PORT6_PAD_CTRL;
825 break;
826 default:
827 dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
828 return;
829 }
830
831 if (port != 6 && phylink_autoneg_inband(mode)) {
832 dev_err(ds->dev, "%s: in-band negotiation unsupported\n",
833 __func__);
834 return;
835 }
836
837 switch (state->interface) {
838 case PHY_INTERFACE_MODE_RGMII:
839 /* RGMII mode means no delay so don't enable the delay */
840 qca8k_write(priv, reg, QCA8K_PORT_PAD_RGMII_EN);
841 break;
842 case PHY_INTERFACE_MODE_RGMII_ID:
843 /* RGMII_ID needs internal delay. This is enabled through
844 * PORT5_PAD_CTRL for all ports, rather than individual port
845 * registers
846 */
847 qca8k_write(priv, reg,
848 QCA8K_PORT_PAD_RGMII_EN |
849 QCA8K_PORT_PAD_RGMII_TX_DELAY(QCA8K_MAX_DELAY) |
850 QCA8K_PORT_PAD_RGMII_RX_DELAY(QCA8K_MAX_DELAY));
851 qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL,
852 QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
853 break;
854 case PHY_INTERFACE_MODE_SGMII:
855 case PHY_INTERFACE_MODE_1000BASEX:
856 /* Enable SGMII on the port */
857 qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
858
859 /* Enable/disable SerDes auto-negotiation as necessary */
860 val = qca8k_read(priv, QCA8K_REG_PWS);
861 if (phylink_autoneg_inband(mode))
862 val &= ~QCA8K_PWS_SERDES_AEN_DIS;
863 else
864 val |= QCA8K_PWS_SERDES_AEN_DIS;
865 qca8k_write(priv, QCA8K_REG_PWS, val);
866
867 /* Configure the SGMII parameters */
868 val = qca8k_read(priv, QCA8K_REG_SGMII_CTRL);
869
870 val |= QCA8K_SGMII_EN_PLL | QCA8K_SGMII_EN_RX |
871 QCA8K_SGMII_EN_TX | QCA8K_SGMII_EN_SD;
872
873 if (dsa_is_cpu_port(ds, port)) {
874 /* CPU port, we're talking to the CPU MAC, be a PHY */
875 val &= ~QCA8K_SGMII_MODE_CTRL_MASK;
876 val |= QCA8K_SGMII_MODE_CTRL_PHY;
877 } else if (state->interface == PHY_INTERFACE_MODE_SGMII) {
878 val &= ~QCA8K_SGMII_MODE_CTRL_MASK;
879 val |= QCA8K_SGMII_MODE_CTRL_MAC;
880 } else if (state->interface == PHY_INTERFACE_MODE_1000BASEX) {
881 val &= ~QCA8K_SGMII_MODE_CTRL_MASK;
882 val |= QCA8K_SGMII_MODE_CTRL_BASEX;
883 }
884
885 qca8k_write(priv, QCA8K_REG_SGMII_CTRL, val);
886 break;
887 default:
888 dev_err(ds->dev, "xMII mode %s not supported for port %d\n",
889 phy_modes(state->interface), port);
890 return;
891 }
892}
893
894static void
895qca8k_phylink_validate(struct dsa_switch *ds, int port,
896 unsigned long *supported,
897 struct phylink_link_state *state)
898{
899 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
900
901 switch (port) {
902 case 0: /* 1st CPU port */
903 if (state->interface != PHY_INTERFACE_MODE_NA &&
904 state->interface != PHY_INTERFACE_MODE_RGMII &&
905 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
906 state->interface != PHY_INTERFACE_MODE_SGMII)
907 goto unsupported;
908 break;
909 case 1:
910 case 2:
911 case 3:
912 case 4:
913 case 5:
914 /* Internal PHY */
915 if (state->interface != PHY_INTERFACE_MODE_NA &&
916 state->interface != PHY_INTERFACE_MODE_GMII)
917 goto unsupported;
918 break;
919 case 6: /* 2nd CPU port / external PHY */
920 if (state->interface != PHY_INTERFACE_MODE_NA &&
921 state->interface != PHY_INTERFACE_MODE_RGMII &&
922 state->interface != PHY_INTERFACE_MODE_RGMII_ID &&
923 state->interface != PHY_INTERFACE_MODE_SGMII &&
924 state->interface != PHY_INTERFACE_MODE_1000BASEX)
925 goto unsupported;
926 break;
927 default:
928unsupported:
929 linkmode_zero(supported);
930 return;
931 }
932
933 phylink_set_port_modes(mask);
934 phylink_set(mask, Autoneg);
935
936 phylink_set(mask, 1000baseT_Full);
937 phylink_set(mask, 10baseT_Half);
938 phylink_set(mask, 10baseT_Full);
939 phylink_set(mask, 100baseT_Half);
940 phylink_set(mask, 100baseT_Full);
941
942 if (state->interface == PHY_INTERFACE_MODE_1000BASEX)
943 phylink_set(mask, 1000baseX_Full);
944
945 phylink_set(mask, Pause);
946 phylink_set(mask, Asym_Pause);
947
948 linkmode_and(supported, supported, mask);
949 linkmode_and(state->advertising, state->advertising, mask);
950}
951
952static int
953qca8k_phylink_mac_link_state(struct dsa_switch *ds, int port,
954 struct phylink_link_state *state)
955{
956 struct qca8k_priv *priv = ds->priv;
957 u32 reg;
958
959 reg = qca8k_read(priv, QCA8K_REG_PORT_STATUS(port));
960
961 state->link = !!(reg & QCA8K_PORT_STATUS_LINK_UP);
962 state->an_complete = state->link;
963 state->an_enabled = !!(reg & QCA8K_PORT_STATUS_LINK_AUTO);
964 state->duplex = (reg & QCA8K_PORT_STATUS_DUPLEX) ? DUPLEX_FULL :
965 DUPLEX_HALF;
966
967 switch (reg & QCA8K_PORT_STATUS_SPEED) {
968 case QCA8K_PORT_STATUS_SPEED_10:
969 state->speed = SPEED_10;
970 break;
971 case QCA8K_PORT_STATUS_SPEED_100:
972 state->speed = SPEED_100;
973 break;
974 case QCA8K_PORT_STATUS_SPEED_1000:
975 state->speed = SPEED_1000;
976 break;
977 default:
978 state->speed = SPEED_UNKNOWN;
979 break;
980 }
981
982 state->pause = MLO_PAUSE_NONE;
983 if (reg & QCA8K_PORT_STATUS_RXFLOW)
984 state->pause |= MLO_PAUSE_RX;
985 if (reg & QCA8K_PORT_STATUS_TXFLOW)
986 state->pause |= MLO_PAUSE_TX;
987
988 return 1;
989}
990
991static void
992qca8k_phylink_mac_link_down(struct dsa_switch *ds, int port, unsigned int mode,
993 phy_interface_t interface)
994{
995 struct qca8k_priv *priv = ds->priv;
996
997 qca8k_port_set_status(priv, port, 0);
998}
999
1000static void
1001qca8k_phylink_mac_link_up(struct dsa_switch *ds, int port, unsigned int mode,
1002 phy_interface_t interface, struct phy_device *phydev,
1003 int speed, int duplex, bool tx_pause, bool rx_pause)
1004{
1005 struct qca8k_priv *priv = ds->priv;
1006 u32 reg;
1007
1008 if (phylink_autoneg_inband(mode)) {
1009 reg = QCA8K_PORT_STATUS_LINK_AUTO;
1010 } else {
1011 switch (speed) {
1012 case SPEED_10:
1013 reg = QCA8K_PORT_STATUS_SPEED_10;
1014 break;
1015 case SPEED_100:
1016 reg = QCA8K_PORT_STATUS_SPEED_100;
1017 break;
1018 case SPEED_1000:
1019 reg = QCA8K_PORT_STATUS_SPEED_1000;
1020 break;
1021 default:
1022 reg = QCA8K_PORT_STATUS_LINK_AUTO;
1023 break;
1024 }
1025
1026 if (duplex == DUPLEX_FULL)
1027 reg |= QCA8K_PORT_STATUS_DUPLEX;
1028
1029 if (rx_pause || dsa_is_cpu_port(ds, port))
1030 reg |= QCA8K_PORT_STATUS_RXFLOW;
1031
1032 if (tx_pause || dsa_is_cpu_port(ds, port))
1033 reg |= QCA8K_PORT_STATUS_TXFLOW;
1034 }
1035
1036 reg |= QCA8K_PORT_STATUS_TXMAC | QCA8K_PORT_STATUS_RXMAC;
1037
1038 qca8k_write(priv, QCA8K_REG_PORT_STATUS(port), reg);
1039}
1040
1041static void
1042qca8k_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *data)
1043{
1044 int i;
1045
1046 if (stringset != ETH_SS_STATS)
1047 return;
1048
1049 for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++)
1050 strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name,
1051 ETH_GSTRING_LEN);
1052}
1053
1054static void
1055qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
1056 uint64_t *data)
1057{
1058 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1059 const struct qca8k_mib_desc *mib;
1060 u32 reg, i;
1061 u64 hi;
1062
1063 for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
1064 mib = &ar8327_mib[i];
1065 reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset;
1066
1067 data[i] = qca8k_read(priv, reg);
1068 if (mib->size == 2) {
1069 hi = qca8k_read(priv, reg + 4);
1070 data[i] |= hi << 32;
1071 }
1072 }
1073}
1074
1075static int
1076qca8k_get_sset_count(struct dsa_switch *ds, int port, int sset)
1077{
1078 if (sset != ETH_SS_STATS)
1079 return 0;
1080
1081 return ARRAY_SIZE(ar8327_mib);
1082}
1083
1084static int
1085qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee)
1086{
1087 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1088 u32 lpi_en = QCA8K_REG_EEE_CTRL_LPI_EN(port);
1089 u32 reg;
1090
1091 mutex_lock(&priv->reg_mutex);
1092 reg = qca8k_read(priv, QCA8K_REG_EEE_CTRL);
1093 if (eee->eee_enabled)
1094 reg |= lpi_en;
1095 else
1096 reg &= ~lpi_en;
1097 qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg);
1098 mutex_unlock(&priv->reg_mutex);
1099
1100 return 0;
1101}
1102
1103static int
1104qca8k_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
1105{
1106 /* Nothing to do on the port's MAC */
1107 return 0;
1108}
1109
1110static void
1111qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
1112{
1113 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1114 u32 stp_state;
1115
1116 switch (state) {
1117 case BR_STATE_DISABLED:
1118 stp_state = QCA8K_PORT_LOOKUP_STATE_DISABLED;
1119 break;
1120 case BR_STATE_BLOCKING:
1121 stp_state = QCA8K_PORT_LOOKUP_STATE_BLOCKING;
1122 break;
1123 case BR_STATE_LISTENING:
1124 stp_state = QCA8K_PORT_LOOKUP_STATE_LISTENING;
1125 break;
1126 case BR_STATE_LEARNING:
1127 stp_state = QCA8K_PORT_LOOKUP_STATE_LEARNING;
1128 break;
1129 case BR_STATE_FORWARDING:
1130 default:
1131 stp_state = QCA8K_PORT_LOOKUP_STATE_FORWARD;
1132 break;
1133 }
1134
1135 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1136 QCA8K_PORT_LOOKUP_STATE_MASK, stp_state);
1137}
1138
1139static int
1140qca8k_port_bridge_join(struct dsa_switch *ds, int port, struct net_device *br)
1141{
1142 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1143 int port_mask = BIT(QCA8K_CPU_PORT);
1144 int i;
1145
1146 for (i = 1; i < QCA8K_NUM_PORTS; i++) {
1147 if (dsa_to_port(ds, i)->bridge_dev != br)
1148 continue;
1149 /* Add this port to the portvlan mask of the other ports
1150 * in the bridge
1151 */
1152 qca8k_reg_set(priv,
1153 QCA8K_PORT_LOOKUP_CTRL(i),
1154 BIT(port));
1155 if (i != port)
1156 port_mask |= BIT(i);
1157 }
1158 /* Add all other ports to this ports portvlan mask */
1159 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1160 QCA8K_PORT_LOOKUP_MEMBER, port_mask);
1161
1162 return 0;
1163}
1164
1165static void
1166qca8k_port_bridge_leave(struct dsa_switch *ds, int port, struct net_device *br)
1167{
1168 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1169 int i;
1170
1171 for (i = 1; i < QCA8K_NUM_PORTS; i++) {
1172 if (dsa_to_port(ds, i)->bridge_dev != br)
1173 continue;
1174 /* Remove this port to the portvlan mask of the other ports
1175 * in the bridge
1176 */
1177 qca8k_reg_clear(priv,
1178 QCA8K_PORT_LOOKUP_CTRL(i),
1179 BIT(port));
1180 }
1181
1182 /* Set the cpu port to be the only one in the portvlan mask of
1183 * this port
1184 */
1185 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1186 QCA8K_PORT_LOOKUP_MEMBER, BIT(QCA8K_CPU_PORT));
1187}
1188
1189static int
1190qca8k_port_enable(struct dsa_switch *ds, int port,
1191 struct phy_device *phy)
1192{
1193 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1194
1195 qca8k_port_set_status(priv, port, 1);
1196 priv->port_sts[port].enabled = 1;
1197
1198 if (dsa_is_user_port(ds, port))
1199 phy_support_asym_pause(phy);
1200
1201 return 0;
1202}
1203
1204static void
1205qca8k_port_disable(struct dsa_switch *ds, int port)
1206{
1207 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1208
1209 qca8k_port_set_status(priv, port, 0);
1210 priv->port_sts[port].enabled = 0;
1211}
1212
1213static int
1214qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
1215{
1216 struct qca8k_priv *priv = ds->priv;
1217 int i, mtu = 0;
1218
1219 priv->port_mtu[port] = new_mtu;
1220
1221 for (i = 0; i < QCA8K_NUM_PORTS; i++)
1222 if (priv->port_mtu[port] > mtu)
1223 mtu = priv->port_mtu[port];
1224
1225 /* Include L2 header / FCS length */
1226 qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN);
1227
1228 return 0;
1229}
1230
1231static int
1232qca8k_port_max_mtu(struct dsa_switch *ds, int port)
1233{
1234 return QCA8K_MAX_MTU;
1235}
1236
1237static int
1238qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
1239 u16 port_mask, u16 vid)
1240{
1241 /* Set the vid to the port vlan id if no vid is set */
1242 if (!vid)
1243 vid = QCA8K_PORT_VID_DEF;
1244
1245 return qca8k_fdb_add(priv, addr, port_mask, vid,
1246 QCA8K_ATU_STATUS_STATIC);
1247}
1248
1249static int
1250qca8k_port_fdb_add(struct dsa_switch *ds, int port,
1251 const unsigned char *addr, u16 vid)
1252{
1253 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1254 u16 port_mask = BIT(port);
1255
1256 return qca8k_port_fdb_insert(priv, addr, port_mask, vid);
1257}
1258
1259static int
1260qca8k_port_fdb_del(struct dsa_switch *ds, int port,
1261 const unsigned char *addr, u16 vid)
1262{
1263 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1264 u16 port_mask = BIT(port);
1265
1266 if (!vid)
1267 vid = QCA8K_PORT_VID_DEF;
1268
1269 return qca8k_fdb_del(priv, addr, port_mask, vid);
1270}
1271
1272static int
1273qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
1274 dsa_fdb_dump_cb_t *cb, void *data)
1275{
1276 struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
1277 struct qca8k_fdb _fdb = { 0 };
1278 int cnt = QCA8K_NUM_FDB_RECORDS;
1279 bool is_static;
1280 int ret = 0;
1281
1282 mutex_lock(&priv->reg_mutex);
1283 while (cnt-- && !qca8k_fdb_next(priv, &_fdb, port)) {
1284 if (!_fdb.aging)
1285 break;
1286 is_static = (_fdb.aging == QCA8K_ATU_STATUS_STATIC);
1287 ret = cb(_fdb.mac, _fdb.vid, is_static, data);
1288 if (ret)
1289 break;
1290 }
1291 mutex_unlock(&priv->reg_mutex);
1292
1293 return 0;
1294}
1295
1296static int
1297qca8k_port_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering)
1298{
1299 struct qca8k_priv *priv = ds->priv;
1300
1301 if (vlan_filtering) {
1302 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1303 QCA8K_PORT_LOOKUP_VLAN_MODE,
1304 QCA8K_PORT_LOOKUP_VLAN_MODE_SECURE);
1305 } else {
1306 qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
1307 QCA8K_PORT_LOOKUP_VLAN_MODE,
1308 QCA8K_PORT_LOOKUP_VLAN_MODE_NONE);
1309 }
1310
1311 return 0;
1312}
1313
1314static int
1315qca8k_port_vlan_prepare(struct dsa_switch *ds, int port,
1316 const struct switchdev_obj_port_vlan *vlan)
1317{
1318 return 0;
1319}
1320
1321static void
1322qca8k_port_vlan_add(struct dsa_switch *ds, int port,
1323 const struct switchdev_obj_port_vlan *vlan)
1324{
1325 bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
1326 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
1327 struct qca8k_priv *priv = ds->priv;
1328 int ret = 0;
1329 u16 vid;
1330
1331 for (vid = vlan->vid_begin; vid <= vlan->vid_end && !ret; ++vid)
1332 ret = qca8k_vlan_add(priv, port, vid, untagged);
1333
1334 if (ret)
1335 dev_err(priv->dev, "Failed to add VLAN to port %d (%d)", port, ret);
1336
1337 if (pvid) {
1338 int shift = 16 * (port % 2);
1339
1340 qca8k_rmw(priv, QCA8K_EGRESS_VLAN(port),
1341 0xfff << shift,
1342 vlan->vid_end << shift);
1343 qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(port),
1344 QCA8K_PORT_VLAN_CVID(vlan->vid_end) |
1345 QCA8K_PORT_VLAN_SVID(vlan->vid_end));
1346 }
1347}
1348
1349static int
1350qca8k_port_vlan_del(struct dsa_switch *ds, int port,
1351 const struct switchdev_obj_port_vlan *vlan)
1352{
1353 struct qca8k_priv *priv = ds->priv;
1354 int ret = 0;
1355 u16 vid;
1356
1357 for (vid = vlan->vid_begin; vid <= vlan->vid_end && !ret; ++vid)
1358 ret = qca8k_vlan_del(priv, port, vid);
1359
1360 if (ret)
1361 dev_err(priv->dev, "Failed to delete VLAN from port %d (%d)", port, ret);
1362
1363 return ret;
1364}
1365
1366static enum dsa_tag_protocol
1367qca8k_get_tag_protocol(struct dsa_switch *ds, int port,
1368 enum dsa_tag_protocol mp)
1369{
1370 return DSA_TAG_PROTO_QCA;
1371}
1372
1373static const struct dsa_switch_ops qca8k_switch_ops = {
1374 .get_tag_protocol = qca8k_get_tag_protocol,
1375 .setup = qca8k_setup,
1376 .get_strings = qca8k_get_strings,
1377 .get_ethtool_stats = qca8k_get_ethtool_stats,
1378 .get_sset_count = qca8k_get_sset_count,
1379 .get_mac_eee = qca8k_get_mac_eee,
1380 .set_mac_eee = qca8k_set_mac_eee,
1381 .port_enable = qca8k_port_enable,
1382 .port_disable = qca8k_port_disable,
1383 .port_change_mtu = qca8k_port_change_mtu,
1384 .port_max_mtu = qca8k_port_max_mtu,
1385 .port_stp_state_set = qca8k_port_stp_state_set,
1386 .port_bridge_join = qca8k_port_bridge_join,
1387 .port_bridge_leave = qca8k_port_bridge_leave,
1388 .port_fdb_add = qca8k_port_fdb_add,
1389 .port_fdb_del = qca8k_port_fdb_del,
1390 .port_fdb_dump = qca8k_port_fdb_dump,
1391 .port_vlan_filtering = qca8k_port_vlan_filtering,
1392 .port_vlan_prepare = qca8k_port_vlan_prepare,
1393 .port_vlan_add = qca8k_port_vlan_add,
1394 .port_vlan_del = qca8k_port_vlan_del,
1395 .phylink_validate = qca8k_phylink_validate,
1396 .phylink_mac_link_state = qca8k_phylink_mac_link_state,
1397 .phylink_mac_config = qca8k_phylink_mac_config,
1398 .phylink_mac_link_down = qca8k_phylink_mac_link_down,
1399 .phylink_mac_link_up = qca8k_phylink_mac_link_up,
1400};
1401
1402static int
1403qca8k_sw_probe(struct mdio_device *mdiodev)
1404{
1405 struct qca8k_priv *priv;
1406 u32 id;
1407
1408 /* allocate the private data struct so that we can probe the switches
1409 * ID register
1410 */
1411 priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);
1412 if (!priv)
1413 return -ENOMEM;
1414
1415 priv->bus = mdiodev->bus;
1416 priv->dev = &mdiodev->dev;
1417
1418 priv->reset_gpio = devm_gpiod_get_optional(priv->dev, "reset",
1419 GPIOD_ASIS);
1420 if (IS_ERR(priv->reset_gpio))
1421 return PTR_ERR(priv->reset_gpio);
1422
1423 if (priv->reset_gpio) {
1424 gpiod_set_value_cansleep(priv->reset_gpio, 1);
1425 /* The active low duration must be greater than 10 ms
1426 * and checkpatch.pl wants 20 ms.
1427 */
1428 msleep(20);
1429 gpiod_set_value_cansleep(priv->reset_gpio, 0);
1430 }
1431
1432 /* read the switches ID register */
1433 id = qca8k_read(priv, QCA8K_REG_MASK_CTRL);
1434 id >>= QCA8K_MASK_CTRL_ID_S;
1435 id &= QCA8K_MASK_CTRL_ID_M;
1436 if (id != QCA8K_ID_QCA8337)
1437 return -ENODEV;
1438
1439 priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL);
1440 if (!priv->ds)
1441 return -ENOMEM;
1442
1443 priv->ds->dev = &mdiodev->dev;
1444 priv->ds->num_ports = QCA8K_NUM_PORTS;
1445 priv->ds->configure_vlan_while_not_filtering = true;
1446 priv->ds->priv = priv;
1447 priv->ops = qca8k_switch_ops;
1448 priv->ds->ops = &priv->ops;
1449 mutex_init(&priv->reg_mutex);
1450 dev_set_drvdata(&mdiodev->dev, priv);
1451
1452 return dsa_register_switch(priv->ds);
1453}
1454
1455static void
1456qca8k_sw_remove(struct mdio_device *mdiodev)
1457{
1458 struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev);
1459 int i;
1460
1461 for (i = 0; i < QCA8K_NUM_PORTS; i++)
1462 qca8k_port_set_status(priv, i, 0);
1463
1464 dsa_unregister_switch(priv->ds);
1465}
1466
1467#ifdef CONFIG_PM_SLEEP
1468static void
1469qca8k_set_pm(struct qca8k_priv *priv, int enable)
1470{
1471 int i;
1472
1473 for (i = 0; i < QCA8K_NUM_PORTS; i++) {
1474 if (!priv->port_sts[i].enabled)
1475 continue;
1476
1477 qca8k_port_set_status(priv, i, enable);
1478 }
1479}
1480
1481static int qca8k_suspend(struct device *dev)
1482{
1483 struct qca8k_priv *priv = dev_get_drvdata(dev);
1484
1485 qca8k_set_pm(priv, 0);
1486
1487 return dsa_switch_suspend(priv->ds);
1488}
1489
1490static int qca8k_resume(struct device *dev)
1491{
1492 struct qca8k_priv *priv = dev_get_drvdata(dev);
1493
1494 qca8k_set_pm(priv, 1);
1495
1496 return dsa_switch_resume(priv->ds);
1497}
1498#endif /* CONFIG_PM_SLEEP */
1499
1500static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
1501 qca8k_suspend, qca8k_resume);
1502
1503static const struct of_device_id qca8k_of_match[] = {
1504 { .compatible = "qca,qca8334" },
1505 { .compatible = "qca,qca8337" },
1506 { /* sentinel */ },
1507};
1508
1509static struct mdio_driver qca8kmdio_driver = {
1510 .probe = qca8k_sw_probe,
1511 .remove = qca8k_sw_remove,
1512 .mdiodrv.driver = {
1513 .name = "qca8k",
1514 .of_match_table = qca8k_of_match,
1515 .pm = &qca8k_pm_ops,
1516 },
1517};
1518
1519mdio_module_driver(qca8kmdio_driver);
1520
1521MODULE_AUTHOR("Mathieu Olivari, John Crispin <john@phrozen.org>");
1522MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family");
1523MODULE_LICENSE("GPL v2");
1524MODULE_ALIAS("platform:qca8k");