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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2022 Schneider-Electric
4 *
5 * Clément Léger <clement.leger@bootlin.com>
6 */
7
8#include <linux/clk.h>
9#include <linux/etherdevice.h>
10#include <linux/if_bridge.h>
11#include <linux/if_ether.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/of_mdio.h>
16#include <net/dsa.h>
17
18#include "rzn1_a5psw.h"
19
20struct a5psw_stats {
21 u16 offset;
22 const char name[ETH_GSTRING_LEN];
23};
24
25#define STAT_DESC(_offset) { \
26 .offset = A5PSW_##_offset, \
27 .name = __stringify(_offset), \
28}
29
30static const struct a5psw_stats a5psw_stats[] = {
31 STAT_DESC(aFramesTransmittedOK),
32 STAT_DESC(aFramesReceivedOK),
33 STAT_DESC(aFrameCheckSequenceErrors),
34 STAT_DESC(aAlignmentErrors),
35 STAT_DESC(aOctetsTransmittedOK),
36 STAT_DESC(aOctetsReceivedOK),
37 STAT_DESC(aTxPAUSEMACCtrlFrames),
38 STAT_DESC(aRxPAUSEMACCtrlFrames),
39 STAT_DESC(ifInErrors),
40 STAT_DESC(ifOutErrors),
41 STAT_DESC(ifInUcastPkts),
42 STAT_DESC(ifInMulticastPkts),
43 STAT_DESC(ifInBroadcastPkts),
44 STAT_DESC(ifOutDiscards),
45 STAT_DESC(ifOutUcastPkts),
46 STAT_DESC(ifOutMulticastPkts),
47 STAT_DESC(ifOutBroadcastPkts),
48 STAT_DESC(etherStatsDropEvents),
49 STAT_DESC(etherStatsOctets),
50 STAT_DESC(etherStatsPkts),
51 STAT_DESC(etherStatsUndersizePkts),
52 STAT_DESC(etherStatsOversizePkts),
53 STAT_DESC(etherStatsPkts64Octets),
54 STAT_DESC(etherStatsPkts65to127Octets),
55 STAT_DESC(etherStatsPkts128to255Octets),
56 STAT_DESC(etherStatsPkts256to511Octets),
57 STAT_DESC(etherStatsPkts1024to1518Octets),
58 STAT_DESC(etherStatsPkts1519toXOctets),
59 STAT_DESC(etherStatsJabbers),
60 STAT_DESC(etherStatsFragments),
61 STAT_DESC(VLANReceived),
62 STAT_DESC(VLANTransmitted),
63 STAT_DESC(aDeferred),
64 STAT_DESC(aMultipleCollisions),
65 STAT_DESC(aSingleCollisions),
66 STAT_DESC(aLateCollisions),
67 STAT_DESC(aExcessiveCollisions),
68 STAT_DESC(aCarrierSenseErrors),
69};
70
71static void a5psw_reg_writel(struct a5psw *a5psw, int offset, u32 value)
72{
73 writel(value, a5psw->base + offset);
74}
75
76static u32 a5psw_reg_readl(struct a5psw *a5psw, int offset)
77{
78 return readl(a5psw->base + offset);
79}
80
81static void a5psw_reg_rmw(struct a5psw *a5psw, int offset, u32 mask, u32 val)
82{
83 u32 reg;
84
85 spin_lock(&a5psw->reg_lock);
86
87 reg = a5psw_reg_readl(a5psw, offset);
88 reg &= ~mask;
89 reg |= val;
90 a5psw_reg_writel(a5psw, offset, reg);
91
92 spin_unlock(&a5psw->reg_lock);
93}
94
95static enum dsa_tag_protocol a5psw_get_tag_protocol(struct dsa_switch *ds,
96 int port,
97 enum dsa_tag_protocol mp)
98{
99 return DSA_TAG_PROTO_RZN1_A5PSW;
100}
101
102static void a5psw_port_pattern_set(struct a5psw *a5psw, int port, int pattern,
103 bool enable)
104{
105 u32 rx_match = 0;
106
107 if (enable)
108 rx_match |= A5PSW_RXMATCH_CONFIG_PATTERN(pattern);
109
110 a5psw_reg_rmw(a5psw, A5PSW_RXMATCH_CONFIG(port),
111 A5PSW_RXMATCH_CONFIG_PATTERN(pattern), rx_match);
112}
113
114static void a5psw_port_mgmtfwd_set(struct a5psw *a5psw, int port, bool enable)
115{
116 /* Enable "management forward" pattern matching, this will forward
117 * packets from this port only towards the management port and thus
118 * isolate the port.
119 */
120 a5psw_port_pattern_set(a5psw, port, A5PSW_PATTERN_MGMTFWD, enable);
121}
122
123static void a5psw_port_tx_enable(struct a5psw *a5psw, int port, bool enable)
124{
125 u32 mask = A5PSW_PORT_ENA_TX(port);
126 u32 reg = enable ? mask : 0;
127
128 /* Even though the port TX is disabled through TXENA bit in the
129 * PORT_ENA register, it can still send BPDUs. This depends on the tag
130 * configuration added when sending packets from the CPU port to the
131 * switch port. Indeed, when using forced forwarding without filtering,
132 * even disabled ports will be able to send packets that are tagged.
133 * This allows to implement STP support when ports are in a state where
134 * forwarding traffic should be stopped but BPDUs should still be sent.
135 */
136 a5psw_reg_rmw(a5psw, A5PSW_PORT_ENA, mask, reg);
137}
138
139static void a5psw_port_enable_set(struct a5psw *a5psw, int port, bool enable)
140{
141 u32 port_ena = 0;
142
143 if (enable)
144 port_ena |= A5PSW_PORT_ENA_TX_RX(port);
145
146 a5psw_reg_rmw(a5psw, A5PSW_PORT_ENA, A5PSW_PORT_ENA_TX_RX(port),
147 port_ena);
148}
149
150static int a5psw_lk_execute_ctrl(struct a5psw *a5psw, u32 *ctrl)
151{
152 int ret;
153
154 a5psw_reg_writel(a5psw, A5PSW_LK_ADDR_CTRL, *ctrl);
155
156 ret = readl_poll_timeout(a5psw->base + A5PSW_LK_ADDR_CTRL, *ctrl,
157 !(*ctrl & A5PSW_LK_ADDR_CTRL_BUSY),
158 A5PSW_LK_BUSY_USEC_POLL, A5PSW_CTRL_TIMEOUT);
159 if (ret)
160 dev_err(a5psw->dev, "LK_CTRL timeout waiting for BUSY bit\n");
161
162 return ret;
163}
164
165static void a5psw_port_fdb_flush(struct a5psw *a5psw, int port)
166{
167 u32 ctrl = A5PSW_LK_ADDR_CTRL_DELETE_PORT | BIT(port);
168
169 mutex_lock(&a5psw->lk_lock);
170 a5psw_lk_execute_ctrl(a5psw, &ctrl);
171 mutex_unlock(&a5psw->lk_lock);
172}
173
174static void a5psw_port_authorize_set(struct a5psw *a5psw, int port,
175 bool authorize)
176{
177 u32 reg = a5psw_reg_readl(a5psw, A5PSW_AUTH_PORT(port));
178
179 if (authorize)
180 reg |= A5PSW_AUTH_PORT_AUTHORIZED;
181 else
182 reg &= ~A5PSW_AUTH_PORT_AUTHORIZED;
183
184 a5psw_reg_writel(a5psw, A5PSW_AUTH_PORT(port), reg);
185}
186
187static void a5psw_port_disable(struct dsa_switch *ds, int port)
188{
189 struct a5psw *a5psw = ds->priv;
190
191 a5psw_port_authorize_set(a5psw, port, false);
192 a5psw_port_enable_set(a5psw, port, false);
193}
194
195static int a5psw_port_enable(struct dsa_switch *ds, int port,
196 struct phy_device *phy)
197{
198 struct a5psw *a5psw = ds->priv;
199
200 a5psw_port_authorize_set(a5psw, port, true);
201 a5psw_port_enable_set(a5psw, port, true);
202
203 return 0;
204}
205
206static int a5psw_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
207{
208 struct a5psw *a5psw = ds->priv;
209
210 new_mtu += ETH_HLEN + A5PSW_EXTRA_MTU_LEN + ETH_FCS_LEN;
211 a5psw_reg_writel(a5psw, A5PSW_FRM_LENGTH(port), new_mtu);
212
213 return 0;
214}
215
216static int a5psw_port_max_mtu(struct dsa_switch *ds, int port)
217{
218 return A5PSW_MAX_MTU;
219}
220
221static void a5psw_phylink_get_caps(struct dsa_switch *ds, int port,
222 struct phylink_config *config)
223{
224 unsigned long *intf = config->supported_interfaces;
225
226 config->mac_capabilities = MAC_1000FD;
227
228 if (dsa_is_cpu_port(ds, port)) {
229 /* GMII is used internally and GMAC2 is connected to the switch
230 * using 1000Mbps Full-Duplex mode only (cf ethernet manual)
231 */
232 __set_bit(PHY_INTERFACE_MODE_GMII, intf);
233 } else {
234 config->mac_capabilities |= MAC_100 | MAC_10;
235 phy_interface_set_rgmii(intf);
236 __set_bit(PHY_INTERFACE_MODE_RMII, intf);
237 __set_bit(PHY_INTERFACE_MODE_MII, intf);
238 }
239}
240
241static struct phylink_pcs *
242a5psw_phylink_mac_select_pcs(struct dsa_switch *ds, int port,
243 phy_interface_t interface)
244{
245 struct dsa_port *dp = dsa_to_port(ds, port);
246 struct a5psw *a5psw = ds->priv;
247
248 if (!dsa_port_is_cpu(dp) && a5psw->pcs[port])
249 return a5psw->pcs[port];
250
251 return NULL;
252}
253
254static void a5psw_phylink_mac_link_down(struct dsa_switch *ds, int port,
255 unsigned int mode,
256 phy_interface_t interface)
257{
258 struct a5psw *a5psw = ds->priv;
259 u32 cmd_cfg;
260
261 cmd_cfg = a5psw_reg_readl(a5psw, A5PSW_CMD_CFG(port));
262 cmd_cfg &= ~(A5PSW_CMD_CFG_RX_ENA | A5PSW_CMD_CFG_TX_ENA);
263 a5psw_reg_writel(a5psw, A5PSW_CMD_CFG(port), cmd_cfg);
264}
265
266static void a5psw_phylink_mac_link_up(struct dsa_switch *ds, int port,
267 unsigned int mode,
268 phy_interface_t interface,
269 struct phy_device *phydev, int speed,
270 int duplex, bool tx_pause, bool rx_pause)
271{
272 u32 cmd_cfg = A5PSW_CMD_CFG_RX_ENA | A5PSW_CMD_CFG_TX_ENA |
273 A5PSW_CMD_CFG_TX_CRC_APPEND;
274 struct a5psw *a5psw = ds->priv;
275
276 if (speed == SPEED_1000)
277 cmd_cfg |= A5PSW_CMD_CFG_ETH_SPEED;
278
279 if (duplex == DUPLEX_HALF)
280 cmd_cfg |= A5PSW_CMD_CFG_HD_ENA;
281
282 cmd_cfg |= A5PSW_CMD_CFG_CNTL_FRM_ENA;
283
284 if (!rx_pause)
285 cmd_cfg &= ~A5PSW_CMD_CFG_PAUSE_IGNORE;
286
287 a5psw_reg_writel(a5psw, A5PSW_CMD_CFG(port), cmd_cfg);
288}
289
290static int a5psw_set_ageing_time(struct dsa_switch *ds, unsigned int msecs)
291{
292 struct a5psw *a5psw = ds->priv;
293 unsigned long rate;
294 u64 max, tmp;
295 u32 agetime;
296
297 rate = clk_get_rate(a5psw->clk);
298 max = div64_ul(((u64)A5PSW_LK_AGETIME_MASK * A5PSW_TABLE_ENTRIES * 1024),
299 rate) * 1000;
300 if (msecs > max)
301 return -EINVAL;
302
303 tmp = div_u64(rate, MSEC_PER_SEC);
304 agetime = div_u64(msecs * tmp, 1024 * A5PSW_TABLE_ENTRIES);
305
306 a5psw_reg_writel(a5psw, A5PSW_LK_AGETIME, agetime);
307
308 return 0;
309}
310
311static void a5psw_port_learning_set(struct a5psw *a5psw, int port, bool learn)
312{
313 u32 mask = A5PSW_INPUT_LEARN_DIS(port);
314 u32 reg = !learn ? mask : 0;
315
316 a5psw_reg_rmw(a5psw, A5PSW_INPUT_LEARN, mask, reg);
317}
318
319static void a5psw_port_rx_block_set(struct a5psw *a5psw, int port, bool block)
320{
321 u32 mask = A5PSW_INPUT_LEARN_BLOCK(port);
322 u32 reg = block ? mask : 0;
323
324 a5psw_reg_rmw(a5psw, A5PSW_INPUT_LEARN, mask, reg);
325}
326
327static void a5psw_flooding_set_resolution(struct a5psw *a5psw, int port,
328 bool set)
329{
330 u8 offsets[] = {A5PSW_UCAST_DEF_MASK, A5PSW_BCAST_DEF_MASK,
331 A5PSW_MCAST_DEF_MASK};
332 int i;
333
334 for (i = 0; i < ARRAY_SIZE(offsets); i++)
335 a5psw_reg_rmw(a5psw, offsets[i], BIT(port),
336 set ? BIT(port) : 0);
337}
338
339static void a5psw_port_set_standalone(struct a5psw *a5psw, int port,
340 bool standalone)
341{
342 a5psw_port_learning_set(a5psw, port, !standalone);
343 a5psw_flooding_set_resolution(a5psw, port, !standalone);
344 a5psw_port_mgmtfwd_set(a5psw, port, standalone);
345}
346
347static int a5psw_port_bridge_join(struct dsa_switch *ds, int port,
348 struct dsa_bridge bridge,
349 bool *tx_fwd_offload,
350 struct netlink_ext_ack *extack)
351{
352 struct a5psw *a5psw = ds->priv;
353
354 /* We only support 1 bridge device */
355 if (a5psw->br_dev && bridge.dev != a5psw->br_dev) {
356 NL_SET_ERR_MSG_MOD(extack,
357 "Forwarding offload supported for a single bridge");
358 return -EOPNOTSUPP;
359 }
360
361 a5psw->br_dev = bridge.dev;
362 a5psw_port_set_standalone(a5psw, port, false);
363
364 a5psw->bridged_ports |= BIT(port);
365
366 return 0;
367}
368
369static void a5psw_port_bridge_leave(struct dsa_switch *ds, int port,
370 struct dsa_bridge bridge)
371{
372 struct a5psw *a5psw = ds->priv;
373
374 a5psw->bridged_ports &= ~BIT(port);
375
376 a5psw_port_set_standalone(a5psw, port, true);
377
378 /* No more ports bridged */
379 if (a5psw->bridged_ports == BIT(A5PSW_CPU_PORT))
380 a5psw->br_dev = NULL;
381}
382
383static int a5psw_port_pre_bridge_flags(struct dsa_switch *ds, int port,
384 struct switchdev_brport_flags flags,
385 struct netlink_ext_ack *extack)
386{
387 if (flags.mask & ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
388 BR_BCAST_FLOOD))
389 return -EINVAL;
390
391 return 0;
392}
393
394static int
395a5psw_port_bridge_flags(struct dsa_switch *ds, int port,
396 struct switchdev_brport_flags flags,
397 struct netlink_ext_ack *extack)
398{
399 struct a5psw *a5psw = ds->priv;
400 u32 val;
401
402 /* If a port is set as standalone, we do not want to be able to
403 * configure flooding nor learning which would result in joining the
404 * unique bridge. This can happen when a port leaves the bridge, in
405 * which case the DSA core will try to "clear" all flags for the
406 * standalone port (ie enable flooding, disable learning). In that case
407 * do not fail but do not apply the flags.
408 */
409 if (!(a5psw->bridged_ports & BIT(port)))
410 return 0;
411
412 if (flags.mask & BR_LEARNING) {
413 val = flags.val & BR_LEARNING ? 0 : A5PSW_INPUT_LEARN_DIS(port);
414 a5psw_reg_rmw(a5psw, A5PSW_INPUT_LEARN,
415 A5PSW_INPUT_LEARN_DIS(port), val);
416 }
417
418 if (flags.mask & BR_FLOOD) {
419 val = flags.val & BR_FLOOD ? BIT(port) : 0;
420 a5psw_reg_rmw(a5psw, A5PSW_UCAST_DEF_MASK, BIT(port), val);
421 }
422
423 if (flags.mask & BR_MCAST_FLOOD) {
424 val = flags.val & BR_MCAST_FLOOD ? BIT(port) : 0;
425 a5psw_reg_rmw(a5psw, A5PSW_MCAST_DEF_MASK, BIT(port), val);
426 }
427
428 if (flags.mask & BR_BCAST_FLOOD) {
429 val = flags.val & BR_BCAST_FLOOD ? BIT(port) : 0;
430 a5psw_reg_rmw(a5psw, A5PSW_BCAST_DEF_MASK, BIT(port), val);
431 }
432
433 return 0;
434}
435
436static void a5psw_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
437{
438 bool learning_enabled, rx_enabled, tx_enabled;
439 struct dsa_port *dp = dsa_to_port(ds, port);
440 struct a5psw *a5psw = ds->priv;
441
442 switch (state) {
443 case BR_STATE_DISABLED:
444 case BR_STATE_BLOCKING:
445 case BR_STATE_LISTENING:
446 rx_enabled = false;
447 tx_enabled = false;
448 learning_enabled = false;
449 break;
450 case BR_STATE_LEARNING:
451 rx_enabled = false;
452 tx_enabled = false;
453 learning_enabled = dp->learning;
454 break;
455 case BR_STATE_FORWARDING:
456 rx_enabled = true;
457 tx_enabled = true;
458 learning_enabled = dp->learning;
459 break;
460 default:
461 dev_err(ds->dev, "invalid STP state: %d\n", state);
462 return;
463 }
464
465 a5psw_port_learning_set(a5psw, port, learning_enabled);
466 a5psw_port_rx_block_set(a5psw, port, !rx_enabled);
467 a5psw_port_tx_enable(a5psw, port, tx_enabled);
468}
469
470static void a5psw_port_fast_age(struct dsa_switch *ds, int port)
471{
472 struct a5psw *a5psw = ds->priv;
473
474 a5psw_port_fdb_flush(a5psw, port);
475}
476
477static int a5psw_lk_execute_lookup(struct a5psw *a5psw, union lk_data *lk_data,
478 u16 *entry)
479{
480 u32 ctrl;
481 int ret;
482
483 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_LO, lk_data->lo);
484 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_HI, lk_data->hi);
485
486 ctrl = A5PSW_LK_ADDR_CTRL_LOOKUP;
487 ret = a5psw_lk_execute_ctrl(a5psw, &ctrl);
488 if (ret)
489 return ret;
490
491 *entry = ctrl & A5PSW_LK_ADDR_CTRL_ADDRESS;
492
493 return 0;
494}
495
496static int a5psw_port_fdb_add(struct dsa_switch *ds, int port,
497 const unsigned char *addr, u16 vid,
498 struct dsa_db db)
499{
500 struct a5psw *a5psw = ds->priv;
501 union lk_data lk_data = {0};
502 bool inc_learncount = false;
503 int ret = 0;
504 u16 entry;
505 u32 reg;
506
507 ether_addr_copy(lk_data.entry.mac, addr);
508 lk_data.entry.port_mask = BIT(port);
509
510 mutex_lock(&a5psw->lk_lock);
511
512 /* Set the value to be written in the lookup table */
513 ret = a5psw_lk_execute_lookup(a5psw, &lk_data, &entry);
514 if (ret)
515 goto lk_unlock;
516
517 lk_data.hi = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_HI);
518 if (!lk_data.entry.valid) {
519 inc_learncount = true;
520 /* port_mask set to 0x1f when entry is not valid, clear it */
521 lk_data.entry.port_mask = 0;
522 lk_data.entry.prio = 0;
523 }
524
525 lk_data.entry.port_mask |= BIT(port);
526 lk_data.entry.is_static = 1;
527 lk_data.entry.valid = 1;
528
529 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_HI, lk_data.hi);
530
531 reg = A5PSW_LK_ADDR_CTRL_WRITE | entry;
532 ret = a5psw_lk_execute_ctrl(a5psw, ®);
533 if (ret)
534 goto lk_unlock;
535
536 if (inc_learncount) {
537 reg = A5PSW_LK_LEARNCOUNT_MODE_INC;
538 a5psw_reg_writel(a5psw, A5PSW_LK_LEARNCOUNT, reg);
539 }
540
541lk_unlock:
542 mutex_unlock(&a5psw->lk_lock);
543
544 return ret;
545}
546
547static int a5psw_port_fdb_del(struct dsa_switch *ds, int port,
548 const unsigned char *addr, u16 vid,
549 struct dsa_db db)
550{
551 struct a5psw *a5psw = ds->priv;
552 union lk_data lk_data = {0};
553 bool clear = false;
554 u16 entry;
555 u32 reg;
556 int ret;
557
558 ether_addr_copy(lk_data.entry.mac, addr);
559
560 mutex_lock(&a5psw->lk_lock);
561
562 ret = a5psw_lk_execute_lookup(a5psw, &lk_data, &entry);
563 if (ret)
564 goto lk_unlock;
565
566 lk_data.hi = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_HI);
567
568 /* Our hardware does not associate any VID to the FDB entries so this
569 * means that if two entries were added for the same mac but for
570 * different VID, then, on the deletion of the first one, we would also
571 * delete the second one. Since there is unfortunately nothing we can do
572 * about that, do not return an error...
573 */
574 if (!lk_data.entry.valid)
575 goto lk_unlock;
576
577 lk_data.entry.port_mask &= ~BIT(port);
578 /* If there is no more port in the mask, clear the entry */
579 if (lk_data.entry.port_mask == 0)
580 clear = true;
581
582 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_HI, lk_data.hi);
583
584 reg = entry;
585 if (clear)
586 reg |= A5PSW_LK_ADDR_CTRL_CLEAR;
587 else
588 reg |= A5PSW_LK_ADDR_CTRL_WRITE;
589
590 ret = a5psw_lk_execute_ctrl(a5psw, ®);
591 if (ret)
592 goto lk_unlock;
593
594 /* Decrement LEARNCOUNT */
595 if (clear) {
596 reg = A5PSW_LK_LEARNCOUNT_MODE_DEC;
597 a5psw_reg_writel(a5psw, A5PSW_LK_LEARNCOUNT, reg);
598 }
599
600lk_unlock:
601 mutex_unlock(&a5psw->lk_lock);
602
603 return ret;
604}
605
606static int a5psw_port_fdb_dump(struct dsa_switch *ds, int port,
607 dsa_fdb_dump_cb_t *cb, void *data)
608{
609 struct a5psw *a5psw = ds->priv;
610 union lk_data lk_data;
611 int i = 0, ret = 0;
612 u32 reg;
613
614 mutex_lock(&a5psw->lk_lock);
615
616 for (i = 0; i < A5PSW_TABLE_ENTRIES; i++) {
617 reg = A5PSW_LK_ADDR_CTRL_READ | A5PSW_LK_ADDR_CTRL_WAIT | i;
618
619 ret = a5psw_lk_execute_ctrl(a5psw, ®);
620 if (ret)
621 goto out_unlock;
622
623 lk_data.hi = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_HI);
624 /* If entry is not valid or does not contain the port, skip */
625 if (!lk_data.entry.valid ||
626 !(lk_data.entry.port_mask & BIT(port)))
627 continue;
628
629 lk_data.lo = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_LO);
630
631 ret = cb(lk_data.entry.mac, 0, lk_data.entry.is_static, data);
632 if (ret)
633 goto out_unlock;
634 }
635
636out_unlock:
637 mutex_unlock(&a5psw->lk_lock);
638
639 return ret;
640}
641
642static int a5psw_port_vlan_filtering(struct dsa_switch *ds, int port,
643 bool vlan_filtering,
644 struct netlink_ext_ack *extack)
645{
646 u32 mask = BIT(port + A5PSW_VLAN_VERI_SHIFT) |
647 BIT(port + A5PSW_VLAN_DISC_SHIFT);
648 u32 val = vlan_filtering ? mask : 0;
649 struct a5psw *a5psw = ds->priv;
650
651 /* Disable/enable vlan tagging */
652 a5psw_reg_rmw(a5psw, A5PSW_VLAN_IN_MODE_ENA, BIT(port),
653 vlan_filtering ? BIT(port) : 0);
654
655 /* Disable/enable vlan input filtering */
656 a5psw_reg_rmw(a5psw, A5PSW_VLAN_VERIFY, mask, val);
657
658 return 0;
659}
660
661static int a5psw_find_vlan_entry(struct a5psw *a5psw, u16 vid)
662{
663 u32 vlan_res;
664 int i;
665
666 /* Find vlan for this port */
667 for (i = 0; i < A5PSW_VLAN_COUNT; i++) {
668 vlan_res = a5psw_reg_readl(a5psw, A5PSW_VLAN_RES(i));
669 if (FIELD_GET(A5PSW_VLAN_RES_VLANID, vlan_res) == vid)
670 return i;
671 }
672
673 return -1;
674}
675
676static int a5psw_new_vlan_res_entry(struct a5psw *a5psw, u16 newvid)
677{
678 u32 vlan_res;
679 int i;
680
681 /* Find a free VLAN entry */
682 for (i = 0; i < A5PSW_VLAN_COUNT; i++) {
683 vlan_res = a5psw_reg_readl(a5psw, A5PSW_VLAN_RES(i));
684 if (!(FIELD_GET(A5PSW_VLAN_RES_PORTMASK, vlan_res))) {
685 vlan_res = FIELD_PREP(A5PSW_VLAN_RES_VLANID, newvid);
686 a5psw_reg_writel(a5psw, A5PSW_VLAN_RES(i), vlan_res);
687 return i;
688 }
689 }
690
691 return -1;
692}
693
694static void a5psw_port_vlan_tagged_cfg(struct a5psw *a5psw,
695 unsigned int vlan_res_id, int port,
696 bool set)
697{
698 u32 mask = A5PSW_VLAN_RES_WR_PORTMASK | A5PSW_VLAN_RES_RD_TAGMASK |
699 BIT(port);
700 u32 vlan_res_off = A5PSW_VLAN_RES(vlan_res_id);
701 u32 val = A5PSW_VLAN_RES_WR_TAGMASK, reg;
702
703 if (set)
704 val |= BIT(port);
705
706 /* Toggle tag mask read */
707 a5psw_reg_writel(a5psw, vlan_res_off, A5PSW_VLAN_RES_RD_TAGMASK);
708 reg = a5psw_reg_readl(a5psw, vlan_res_off);
709 a5psw_reg_writel(a5psw, vlan_res_off, A5PSW_VLAN_RES_RD_TAGMASK);
710
711 reg &= ~mask;
712 reg |= val;
713 a5psw_reg_writel(a5psw, vlan_res_off, reg);
714}
715
716static void a5psw_port_vlan_cfg(struct a5psw *a5psw, unsigned int vlan_res_id,
717 int port, bool set)
718{
719 u32 mask = A5PSW_VLAN_RES_WR_TAGMASK | BIT(port);
720 u32 reg = A5PSW_VLAN_RES_WR_PORTMASK;
721
722 if (set)
723 reg |= BIT(port);
724
725 a5psw_reg_rmw(a5psw, A5PSW_VLAN_RES(vlan_res_id), mask, reg);
726}
727
728static int a5psw_port_vlan_add(struct dsa_switch *ds, int port,
729 const struct switchdev_obj_port_vlan *vlan,
730 struct netlink_ext_ack *extack)
731{
732 bool tagged = !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED);
733 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
734 struct a5psw *a5psw = ds->priv;
735 u16 vid = vlan->vid;
736 int vlan_res_id;
737
738 vlan_res_id = a5psw_find_vlan_entry(a5psw, vid);
739 if (vlan_res_id < 0) {
740 vlan_res_id = a5psw_new_vlan_res_entry(a5psw, vid);
741 if (vlan_res_id < 0)
742 return -ENOSPC;
743 }
744
745 a5psw_port_vlan_cfg(a5psw, vlan_res_id, port, true);
746 if (tagged)
747 a5psw_port_vlan_tagged_cfg(a5psw, vlan_res_id, port, true);
748
749 /* Configure port to tag with corresponding VID, but do not enable it
750 * yet: wait for vlan filtering to be enabled to enable vlan port
751 * tagging
752 */
753 if (pvid)
754 a5psw_reg_writel(a5psw, A5PSW_SYSTEM_TAGINFO(port), vid);
755
756 return 0;
757}
758
759static int a5psw_port_vlan_del(struct dsa_switch *ds, int port,
760 const struct switchdev_obj_port_vlan *vlan)
761{
762 struct a5psw *a5psw = ds->priv;
763 u16 vid = vlan->vid;
764 int vlan_res_id;
765
766 vlan_res_id = a5psw_find_vlan_entry(a5psw, vid);
767 if (vlan_res_id < 0)
768 return -EINVAL;
769
770 a5psw_port_vlan_cfg(a5psw, vlan_res_id, port, false);
771 a5psw_port_vlan_tagged_cfg(a5psw, vlan_res_id, port, false);
772
773 return 0;
774}
775
776static u64 a5psw_read_stat(struct a5psw *a5psw, u32 offset, int port)
777{
778 u32 reg_lo, reg_hi;
779
780 reg_lo = a5psw_reg_readl(a5psw, offset + A5PSW_PORT_OFFSET(port));
781 /* A5PSW_STATS_HIWORD is latched on stat read */
782 reg_hi = a5psw_reg_readl(a5psw, A5PSW_STATS_HIWORD);
783
784 return ((u64)reg_hi << 32) | reg_lo;
785}
786
787static void a5psw_get_strings(struct dsa_switch *ds, int port, u32 stringset,
788 uint8_t *data)
789{
790 unsigned int u;
791
792 if (stringset != ETH_SS_STATS)
793 return;
794
795 for (u = 0; u < ARRAY_SIZE(a5psw_stats); u++) {
796 memcpy(data + u * ETH_GSTRING_LEN, a5psw_stats[u].name,
797 ETH_GSTRING_LEN);
798 }
799}
800
801static void a5psw_get_ethtool_stats(struct dsa_switch *ds, int port,
802 uint64_t *data)
803{
804 struct a5psw *a5psw = ds->priv;
805 unsigned int u;
806
807 for (u = 0; u < ARRAY_SIZE(a5psw_stats); u++)
808 data[u] = a5psw_read_stat(a5psw, a5psw_stats[u].offset, port);
809}
810
811static int a5psw_get_sset_count(struct dsa_switch *ds, int port, int sset)
812{
813 if (sset != ETH_SS_STATS)
814 return 0;
815
816 return ARRAY_SIZE(a5psw_stats);
817}
818
819static void a5psw_get_eth_mac_stats(struct dsa_switch *ds, int port,
820 struct ethtool_eth_mac_stats *mac_stats)
821{
822 struct a5psw *a5psw = ds->priv;
823
824#define RD(name) a5psw_read_stat(a5psw, A5PSW_##name, port)
825 mac_stats->FramesTransmittedOK = RD(aFramesTransmittedOK);
826 mac_stats->SingleCollisionFrames = RD(aSingleCollisions);
827 mac_stats->MultipleCollisionFrames = RD(aMultipleCollisions);
828 mac_stats->FramesReceivedOK = RD(aFramesReceivedOK);
829 mac_stats->FrameCheckSequenceErrors = RD(aFrameCheckSequenceErrors);
830 mac_stats->AlignmentErrors = RD(aAlignmentErrors);
831 mac_stats->OctetsTransmittedOK = RD(aOctetsTransmittedOK);
832 mac_stats->FramesWithDeferredXmissions = RD(aDeferred);
833 mac_stats->LateCollisions = RD(aLateCollisions);
834 mac_stats->FramesAbortedDueToXSColls = RD(aExcessiveCollisions);
835 mac_stats->FramesLostDueToIntMACXmitError = RD(ifOutErrors);
836 mac_stats->CarrierSenseErrors = RD(aCarrierSenseErrors);
837 mac_stats->OctetsReceivedOK = RD(aOctetsReceivedOK);
838 mac_stats->FramesLostDueToIntMACRcvError = RD(ifInErrors);
839 mac_stats->MulticastFramesXmittedOK = RD(ifOutMulticastPkts);
840 mac_stats->BroadcastFramesXmittedOK = RD(ifOutBroadcastPkts);
841 mac_stats->FramesWithExcessiveDeferral = RD(aDeferred);
842 mac_stats->MulticastFramesReceivedOK = RD(ifInMulticastPkts);
843 mac_stats->BroadcastFramesReceivedOK = RD(ifInBroadcastPkts);
844#undef RD
845}
846
847static const struct ethtool_rmon_hist_range a5psw_rmon_ranges[] = {
848 { 0, 64 },
849 { 65, 127 },
850 { 128, 255 },
851 { 256, 511 },
852 { 512, 1023 },
853 { 1024, 1518 },
854 { 1519, A5PSW_MAX_MTU },
855 {}
856};
857
858static void a5psw_get_rmon_stats(struct dsa_switch *ds, int port,
859 struct ethtool_rmon_stats *rmon_stats,
860 const struct ethtool_rmon_hist_range **ranges)
861{
862 struct a5psw *a5psw = ds->priv;
863
864#define RD(name) a5psw_read_stat(a5psw, A5PSW_##name, port)
865 rmon_stats->undersize_pkts = RD(etherStatsUndersizePkts);
866 rmon_stats->oversize_pkts = RD(etherStatsOversizePkts);
867 rmon_stats->fragments = RD(etherStatsFragments);
868 rmon_stats->jabbers = RD(etherStatsJabbers);
869 rmon_stats->hist[0] = RD(etherStatsPkts64Octets);
870 rmon_stats->hist[1] = RD(etherStatsPkts65to127Octets);
871 rmon_stats->hist[2] = RD(etherStatsPkts128to255Octets);
872 rmon_stats->hist[3] = RD(etherStatsPkts256to511Octets);
873 rmon_stats->hist[4] = RD(etherStatsPkts512to1023Octets);
874 rmon_stats->hist[5] = RD(etherStatsPkts1024to1518Octets);
875 rmon_stats->hist[6] = RD(etherStatsPkts1519toXOctets);
876#undef RD
877
878 *ranges = a5psw_rmon_ranges;
879}
880
881static void a5psw_get_eth_ctrl_stats(struct dsa_switch *ds, int port,
882 struct ethtool_eth_ctrl_stats *ctrl_stats)
883{
884 struct a5psw *a5psw = ds->priv;
885 u64 stat;
886
887 stat = a5psw_read_stat(a5psw, A5PSW_aTxPAUSEMACCtrlFrames, port);
888 ctrl_stats->MACControlFramesTransmitted = stat;
889 stat = a5psw_read_stat(a5psw, A5PSW_aRxPAUSEMACCtrlFrames, port);
890 ctrl_stats->MACControlFramesReceived = stat;
891}
892
893static void a5psw_vlan_setup(struct a5psw *a5psw, int port)
894{
895 u32 reg;
896
897 /* Enable TAG always mode for the port, this is actually controlled
898 * by VLAN_IN_MODE_ENA field which will be used for PVID insertion
899 */
900 reg = A5PSW_VLAN_IN_MODE_TAG_ALWAYS;
901 reg <<= A5PSW_VLAN_IN_MODE_PORT_SHIFT(port);
902 a5psw_reg_rmw(a5psw, A5PSW_VLAN_IN_MODE, A5PSW_VLAN_IN_MODE_PORT(port),
903 reg);
904
905 /* Set transparent mode for output frame manipulation, this will depend
906 * on the VLAN_RES configuration mode
907 */
908 reg = A5PSW_VLAN_OUT_MODE_TRANSPARENT;
909 reg <<= A5PSW_VLAN_OUT_MODE_PORT_SHIFT(port);
910 a5psw_reg_rmw(a5psw, A5PSW_VLAN_OUT_MODE,
911 A5PSW_VLAN_OUT_MODE_PORT(port), reg);
912}
913
914static int a5psw_setup(struct dsa_switch *ds)
915{
916 struct a5psw *a5psw = ds->priv;
917 int port, vlan, ret;
918 struct dsa_port *dp;
919 u32 reg;
920
921 /* Validate that there is only 1 CPU port with index A5PSW_CPU_PORT */
922 dsa_switch_for_each_cpu_port(dp, ds) {
923 if (dp->index != A5PSW_CPU_PORT) {
924 dev_err(a5psw->dev, "Invalid CPU port\n");
925 return -EINVAL;
926 }
927 }
928
929 /* Configure management port */
930 reg = A5PSW_CPU_PORT | A5PSW_MGMT_CFG_ENABLE;
931 a5psw_reg_writel(a5psw, A5PSW_MGMT_CFG, reg);
932
933 /* Set pattern 0 to forward all frame to mgmt port */
934 a5psw_reg_writel(a5psw, A5PSW_PATTERN_CTRL(A5PSW_PATTERN_MGMTFWD),
935 A5PSW_PATTERN_CTRL_MGMTFWD);
936
937 /* Enable port tagging */
938 reg = FIELD_PREP(A5PSW_MGMT_TAG_CFG_TAGFIELD, ETH_P_DSA_A5PSW);
939 reg |= A5PSW_MGMT_TAG_CFG_ENABLE | A5PSW_MGMT_TAG_CFG_ALL_FRAMES;
940 a5psw_reg_writel(a5psw, A5PSW_MGMT_TAG_CFG, reg);
941
942 /* Enable normal switch operation */
943 reg = A5PSW_LK_ADDR_CTRL_BLOCKING | A5PSW_LK_ADDR_CTRL_LEARNING |
944 A5PSW_LK_ADDR_CTRL_AGEING | A5PSW_LK_ADDR_CTRL_ALLOW_MIGR |
945 A5PSW_LK_ADDR_CTRL_CLEAR_TABLE;
946 a5psw_reg_writel(a5psw, A5PSW_LK_CTRL, reg);
947
948 ret = readl_poll_timeout(a5psw->base + A5PSW_LK_CTRL, reg,
949 !(reg & A5PSW_LK_ADDR_CTRL_CLEAR_TABLE),
950 A5PSW_LK_BUSY_USEC_POLL, A5PSW_CTRL_TIMEOUT);
951 if (ret) {
952 dev_err(a5psw->dev, "Failed to clear lookup table\n");
953 return ret;
954 }
955
956 /* Reset learn count to 0 */
957 reg = A5PSW_LK_LEARNCOUNT_MODE_SET;
958 a5psw_reg_writel(a5psw, A5PSW_LK_LEARNCOUNT, reg);
959
960 /* Clear VLAN resource table */
961 reg = A5PSW_VLAN_RES_WR_PORTMASK | A5PSW_VLAN_RES_WR_TAGMASK;
962 for (vlan = 0; vlan < A5PSW_VLAN_COUNT; vlan++)
963 a5psw_reg_writel(a5psw, A5PSW_VLAN_RES(vlan), reg);
964
965 /* Reset all ports */
966 dsa_switch_for_each_port(dp, ds) {
967 port = dp->index;
968
969 /* Reset the port */
970 a5psw_reg_writel(a5psw, A5PSW_CMD_CFG(port),
971 A5PSW_CMD_CFG_SW_RESET);
972
973 /* Enable only CPU port */
974 a5psw_port_enable_set(a5psw, port, dsa_port_is_cpu(dp));
975
976 if (dsa_port_is_unused(dp))
977 continue;
978
979 /* Enable egress flooding and learning for CPU port */
980 if (dsa_port_is_cpu(dp)) {
981 a5psw_flooding_set_resolution(a5psw, port, true);
982 a5psw_port_learning_set(a5psw, port, true);
983 }
984
985 /* Enable standalone mode for user ports */
986 if (dsa_port_is_user(dp))
987 a5psw_port_set_standalone(a5psw, port, true);
988
989 a5psw_vlan_setup(a5psw, port);
990 }
991
992 return 0;
993}
994
995static const struct dsa_switch_ops a5psw_switch_ops = {
996 .get_tag_protocol = a5psw_get_tag_protocol,
997 .setup = a5psw_setup,
998 .port_disable = a5psw_port_disable,
999 .port_enable = a5psw_port_enable,
1000 .phylink_get_caps = a5psw_phylink_get_caps,
1001 .phylink_mac_select_pcs = a5psw_phylink_mac_select_pcs,
1002 .phylink_mac_link_down = a5psw_phylink_mac_link_down,
1003 .phylink_mac_link_up = a5psw_phylink_mac_link_up,
1004 .port_change_mtu = a5psw_port_change_mtu,
1005 .port_max_mtu = a5psw_port_max_mtu,
1006 .get_sset_count = a5psw_get_sset_count,
1007 .get_strings = a5psw_get_strings,
1008 .get_ethtool_stats = a5psw_get_ethtool_stats,
1009 .get_eth_mac_stats = a5psw_get_eth_mac_stats,
1010 .get_eth_ctrl_stats = a5psw_get_eth_ctrl_stats,
1011 .get_rmon_stats = a5psw_get_rmon_stats,
1012 .set_ageing_time = a5psw_set_ageing_time,
1013 .port_bridge_join = a5psw_port_bridge_join,
1014 .port_bridge_leave = a5psw_port_bridge_leave,
1015 .port_pre_bridge_flags = a5psw_port_pre_bridge_flags,
1016 .port_bridge_flags = a5psw_port_bridge_flags,
1017 .port_stp_state_set = a5psw_port_stp_state_set,
1018 .port_fast_age = a5psw_port_fast_age,
1019 .port_vlan_filtering = a5psw_port_vlan_filtering,
1020 .port_vlan_add = a5psw_port_vlan_add,
1021 .port_vlan_del = a5psw_port_vlan_del,
1022 .port_fdb_add = a5psw_port_fdb_add,
1023 .port_fdb_del = a5psw_port_fdb_del,
1024 .port_fdb_dump = a5psw_port_fdb_dump,
1025};
1026
1027static int a5psw_mdio_wait_busy(struct a5psw *a5psw)
1028{
1029 u32 status;
1030 int err;
1031
1032 err = readl_poll_timeout(a5psw->base + A5PSW_MDIO_CFG_STATUS, status,
1033 !(status & A5PSW_MDIO_CFG_STATUS_BUSY), 10,
1034 1000 * USEC_PER_MSEC);
1035 if (err)
1036 dev_err(a5psw->dev, "MDIO command timeout\n");
1037
1038 return err;
1039}
1040
1041static int a5psw_mdio_read(struct mii_bus *bus, int phy_id, int phy_reg)
1042{
1043 struct a5psw *a5psw = bus->priv;
1044 u32 cmd, status;
1045 int ret;
1046
1047 cmd = A5PSW_MDIO_COMMAND_READ;
1048 cmd |= FIELD_PREP(A5PSW_MDIO_COMMAND_REG_ADDR, phy_reg);
1049 cmd |= FIELD_PREP(A5PSW_MDIO_COMMAND_PHY_ADDR, phy_id);
1050
1051 a5psw_reg_writel(a5psw, A5PSW_MDIO_COMMAND, cmd);
1052
1053 ret = a5psw_mdio_wait_busy(a5psw);
1054 if (ret)
1055 return ret;
1056
1057 ret = a5psw_reg_readl(a5psw, A5PSW_MDIO_DATA) & A5PSW_MDIO_DATA_MASK;
1058
1059 status = a5psw_reg_readl(a5psw, A5PSW_MDIO_CFG_STATUS);
1060 if (status & A5PSW_MDIO_CFG_STATUS_READERR)
1061 return -EIO;
1062
1063 return ret;
1064}
1065
1066static int a5psw_mdio_write(struct mii_bus *bus, int phy_id, int phy_reg,
1067 u16 phy_data)
1068{
1069 struct a5psw *a5psw = bus->priv;
1070 u32 cmd;
1071
1072 cmd = FIELD_PREP(A5PSW_MDIO_COMMAND_REG_ADDR, phy_reg);
1073 cmd |= FIELD_PREP(A5PSW_MDIO_COMMAND_PHY_ADDR, phy_id);
1074
1075 a5psw_reg_writel(a5psw, A5PSW_MDIO_COMMAND, cmd);
1076 a5psw_reg_writel(a5psw, A5PSW_MDIO_DATA, phy_data);
1077
1078 return a5psw_mdio_wait_busy(a5psw);
1079}
1080
1081static int a5psw_mdio_config(struct a5psw *a5psw, u32 mdio_freq)
1082{
1083 unsigned long rate;
1084 unsigned long div;
1085 u32 cfgstatus;
1086
1087 rate = clk_get_rate(a5psw->hclk);
1088 div = ((rate / mdio_freq) / 2);
1089 if (div > FIELD_MAX(A5PSW_MDIO_CFG_STATUS_CLKDIV) ||
1090 div < A5PSW_MDIO_CLK_DIV_MIN) {
1091 dev_err(a5psw->dev, "MDIO clock div %ld out of range\n", div);
1092 return -ERANGE;
1093 }
1094
1095 cfgstatus = FIELD_PREP(A5PSW_MDIO_CFG_STATUS_CLKDIV, div);
1096
1097 a5psw_reg_writel(a5psw, A5PSW_MDIO_CFG_STATUS, cfgstatus);
1098
1099 return 0;
1100}
1101
1102static int a5psw_probe_mdio(struct a5psw *a5psw, struct device_node *node)
1103{
1104 struct device *dev = a5psw->dev;
1105 struct mii_bus *bus;
1106 u32 mdio_freq;
1107 int ret;
1108
1109 if (of_property_read_u32(node, "clock-frequency", &mdio_freq))
1110 mdio_freq = A5PSW_MDIO_DEF_FREQ;
1111
1112 ret = a5psw_mdio_config(a5psw, mdio_freq);
1113 if (ret)
1114 return ret;
1115
1116 bus = devm_mdiobus_alloc(dev);
1117 if (!bus)
1118 return -ENOMEM;
1119
1120 bus->name = "a5psw_mdio";
1121 bus->read = a5psw_mdio_read;
1122 bus->write = a5psw_mdio_write;
1123 bus->priv = a5psw;
1124 bus->parent = dev;
1125 snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
1126
1127 a5psw->mii_bus = bus;
1128
1129 return devm_of_mdiobus_register(dev, bus, node);
1130}
1131
1132static void a5psw_pcs_free(struct a5psw *a5psw)
1133{
1134 int i;
1135
1136 for (i = 0; i < ARRAY_SIZE(a5psw->pcs); i++) {
1137 if (a5psw->pcs[i])
1138 miic_destroy(a5psw->pcs[i]);
1139 }
1140}
1141
1142static int a5psw_pcs_get(struct a5psw *a5psw)
1143{
1144 struct device_node *ports, *port, *pcs_node;
1145 struct phylink_pcs *pcs;
1146 int ret;
1147 u32 reg;
1148
1149 ports = of_get_child_by_name(a5psw->dev->of_node, "ethernet-ports");
1150 if (!ports)
1151 return -EINVAL;
1152
1153 for_each_available_child_of_node(ports, port) {
1154 pcs_node = of_parse_phandle(port, "pcs-handle", 0);
1155 if (!pcs_node)
1156 continue;
1157
1158 if (of_property_read_u32(port, "reg", ®)) {
1159 ret = -EINVAL;
1160 goto free_pcs;
1161 }
1162
1163 if (reg >= ARRAY_SIZE(a5psw->pcs)) {
1164 ret = -ENODEV;
1165 goto free_pcs;
1166 }
1167
1168 pcs = miic_create(a5psw->dev, pcs_node);
1169 if (IS_ERR(pcs)) {
1170 dev_err(a5psw->dev, "Failed to create PCS for port %d\n",
1171 reg);
1172 ret = PTR_ERR(pcs);
1173 goto free_pcs;
1174 }
1175
1176 a5psw->pcs[reg] = pcs;
1177 of_node_put(pcs_node);
1178 }
1179 of_node_put(ports);
1180
1181 return 0;
1182
1183free_pcs:
1184 of_node_put(pcs_node);
1185 of_node_put(port);
1186 of_node_put(ports);
1187 a5psw_pcs_free(a5psw);
1188
1189 return ret;
1190}
1191
1192static int a5psw_probe(struct platform_device *pdev)
1193{
1194 struct device *dev = &pdev->dev;
1195 struct device_node *mdio;
1196 struct dsa_switch *ds;
1197 struct a5psw *a5psw;
1198 int ret;
1199
1200 a5psw = devm_kzalloc(dev, sizeof(*a5psw), GFP_KERNEL);
1201 if (!a5psw)
1202 return -ENOMEM;
1203
1204 a5psw->dev = dev;
1205 mutex_init(&a5psw->lk_lock);
1206 spin_lock_init(&a5psw->reg_lock);
1207 a5psw->base = devm_platform_ioremap_resource(pdev, 0);
1208 if (IS_ERR(a5psw->base))
1209 return PTR_ERR(a5psw->base);
1210
1211 a5psw->bridged_ports = BIT(A5PSW_CPU_PORT);
1212
1213 ret = a5psw_pcs_get(a5psw);
1214 if (ret)
1215 return ret;
1216
1217 a5psw->hclk = devm_clk_get(dev, "hclk");
1218 if (IS_ERR(a5psw->hclk)) {
1219 dev_err(dev, "failed get hclk clock\n");
1220 ret = PTR_ERR(a5psw->hclk);
1221 goto free_pcs;
1222 }
1223
1224 a5psw->clk = devm_clk_get(dev, "clk");
1225 if (IS_ERR(a5psw->clk)) {
1226 dev_err(dev, "failed get clk_switch clock\n");
1227 ret = PTR_ERR(a5psw->clk);
1228 goto free_pcs;
1229 }
1230
1231 ret = clk_prepare_enable(a5psw->clk);
1232 if (ret)
1233 goto free_pcs;
1234
1235 ret = clk_prepare_enable(a5psw->hclk);
1236 if (ret)
1237 goto clk_disable;
1238
1239 mdio = of_get_child_by_name(dev->of_node, "mdio");
1240 if (of_device_is_available(mdio)) {
1241 ret = a5psw_probe_mdio(a5psw, mdio);
1242 if (ret) {
1243 of_node_put(mdio);
1244 dev_err(dev, "Failed to register MDIO: %d\n", ret);
1245 goto hclk_disable;
1246 }
1247 }
1248
1249 of_node_put(mdio);
1250
1251 ds = &a5psw->ds;
1252 ds->dev = dev;
1253 ds->num_ports = A5PSW_PORTS_NUM;
1254 ds->ops = &a5psw_switch_ops;
1255 ds->priv = a5psw;
1256
1257 ret = dsa_register_switch(ds);
1258 if (ret) {
1259 dev_err(dev, "Failed to register DSA switch: %d\n", ret);
1260 goto hclk_disable;
1261 }
1262
1263 return 0;
1264
1265hclk_disable:
1266 clk_disable_unprepare(a5psw->hclk);
1267clk_disable:
1268 clk_disable_unprepare(a5psw->clk);
1269free_pcs:
1270 a5psw_pcs_free(a5psw);
1271
1272 return ret;
1273}
1274
1275static void a5psw_remove(struct platform_device *pdev)
1276{
1277 struct a5psw *a5psw = platform_get_drvdata(pdev);
1278
1279 if (!a5psw)
1280 return;
1281
1282 dsa_unregister_switch(&a5psw->ds);
1283 a5psw_pcs_free(a5psw);
1284 clk_disable_unprepare(a5psw->hclk);
1285 clk_disable_unprepare(a5psw->clk);
1286}
1287
1288static void a5psw_shutdown(struct platform_device *pdev)
1289{
1290 struct a5psw *a5psw = platform_get_drvdata(pdev);
1291
1292 if (!a5psw)
1293 return;
1294
1295 dsa_switch_shutdown(&a5psw->ds);
1296
1297 platform_set_drvdata(pdev, NULL);
1298}
1299
1300static const struct of_device_id a5psw_of_mtable[] = {
1301 { .compatible = "renesas,rzn1-a5psw", },
1302 { /* sentinel */ },
1303};
1304MODULE_DEVICE_TABLE(of, a5psw_of_mtable);
1305
1306static struct platform_driver a5psw_driver = {
1307 .driver = {
1308 .name = "rzn1_a5psw",
1309 .of_match_table = a5psw_of_mtable,
1310 },
1311 .probe = a5psw_probe,
1312 .remove_new = a5psw_remove,
1313 .shutdown = a5psw_shutdown,
1314};
1315module_platform_driver(a5psw_driver);
1316
1317MODULE_LICENSE("GPL");
1318MODULE_DESCRIPTION("Renesas RZ/N1 Advanced 5-port Switch driver");
1319MODULE_AUTHOR("Clément Léger <clement.leger@bootlin.com>");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2022 Schneider-Electric
4 *
5 * Clément Léger <clement.leger@bootlin.com>
6 */
7
8#include <linux/clk.h>
9#include <linux/etherdevice.h>
10#include <linux/if_bridge.h>
11#include <linux/if_ether.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/of.h>
15#include <linux/of_mdio.h>
16#include <net/dsa.h>
17
18#include "rzn1_a5psw.h"
19
20struct a5psw_stats {
21 u16 offset;
22 const char name[ETH_GSTRING_LEN];
23};
24
25#define STAT_DESC(_offset) { \
26 .offset = A5PSW_##_offset, \
27 .name = __stringify(_offset), \
28}
29
30static const struct a5psw_stats a5psw_stats[] = {
31 STAT_DESC(aFramesTransmittedOK),
32 STAT_DESC(aFramesReceivedOK),
33 STAT_DESC(aFrameCheckSequenceErrors),
34 STAT_DESC(aAlignmentErrors),
35 STAT_DESC(aOctetsTransmittedOK),
36 STAT_DESC(aOctetsReceivedOK),
37 STAT_DESC(aTxPAUSEMACCtrlFrames),
38 STAT_DESC(aRxPAUSEMACCtrlFrames),
39 STAT_DESC(ifInErrors),
40 STAT_DESC(ifOutErrors),
41 STAT_DESC(ifInUcastPkts),
42 STAT_DESC(ifInMulticastPkts),
43 STAT_DESC(ifInBroadcastPkts),
44 STAT_DESC(ifOutDiscards),
45 STAT_DESC(ifOutUcastPkts),
46 STAT_DESC(ifOutMulticastPkts),
47 STAT_DESC(ifOutBroadcastPkts),
48 STAT_DESC(etherStatsDropEvents),
49 STAT_DESC(etherStatsOctets),
50 STAT_DESC(etherStatsPkts),
51 STAT_DESC(etherStatsUndersizePkts),
52 STAT_DESC(etherStatsOversizePkts),
53 STAT_DESC(etherStatsPkts64Octets),
54 STAT_DESC(etherStatsPkts65to127Octets),
55 STAT_DESC(etherStatsPkts128to255Octets),
56 STAT_DESC(etherStatsPkts256to511Octets),
57 STAT_DESC(etherStatsPkts1024to1518Octets),
58 STAT_DESC(etherStatsPkts1519toXOctets),
59 STAT_DESC(etherStatsJabbers),
60 STAT_DESC(etherStatsFragments),
61 STAT_DESC(VLANReceived),
62 STAT_DESC(VLANTransmitted),
63 STAT_DESC(aDeferred),
64 STAT_DESC(aMultipleCollisions),
65 STAT_DESC(aSingleCollisions),
66 STAT_DESC(aLateCollisions),
67 STAT_DESC(aExcessiveCollisions),
68 STAT_DESC(aCarrierSenseErrors),
69};
70
71static void a5psw_reg_writel(struct a5psw *a5psw, int offset, u32 value)
72{
73 writel(value, a5psw->base + offset);
74}
75
76static u32 a5psw_reg_readl(struct a5psw *a5psw, int offset)
77{
78 return readl(a5psw->base + offset);
79}
80
81static void a5psw_reg_rmw(struct a5psw *a5psw, int offset, u32 mask, u32 val)
82{
83 u32 reg;
84
85 spin_lock(&a5psw->reg_lock);
86
87 reg = a5psw_reg_readl(a5psw, offset);
88 reg &= ~mask;
89 reg |= val;
90 a5psw_reg_writel(a5psw, offset, reg);
91
92 spin_unlock(&a5psw->reg_lock);
93}
94
95static enum dsa_tag_protocol a5psw_get_tag_protocol(struct dsa_switch *ds,
96 int port,
97 enum dsa_tag_protocol mp)
98{
99 return DSA_TAG_PROTO_RZN1_A5PSW;
100}
101
102static void a5psw_port_pattern_set(struct a5psw *a5psw, int port, int pattern,
103 bool enable)
104{
105 u32 rx_match = 0;
106
107 if (enable)
108 rx_match |= A5PSW_RXMATCH_CONFIG_PATTERN(pattern);
109
110 a5psw_reg_rmw(a5psw, A5PSW_RXMATCH_CONFIG(port),
111 A5PSW_RXMATCH_CONFIG_PATTERN(pattern), rx_match);
112}
113
114static void a5psw_port_mgmtfwd_set(struct a5psw *a5psw, int port, bool enable)
115{
116 /* Enable "management forward" pattern matching, this will forward
117 * packets from this port only towards the management port and thus
118 * isolate the port.
119 */
120 a5psw_port_pattern_set(a5psw, port, A5PSW_PATTERN_MGMTFWD, enable);
121}
122
123static void a5psw_port_tx_enable(struct a5psw *a5psw, int port, bool enable)
124{
125 u32 mask = A5PSW_PORT_ENA_TX(port);
126 u32 reg = enable ? mask : 0;
127
128 /* Even though the port TX is disabled through TXENA bit in the
129 * PORT_ENA register, it can still send BPDUs. This depends on the tag
130 * configuration added when sending packets from the CPU port to the
131 * switch port. Indeed, when using forced forwarding without filtering,
132 * even disabled ports will be able to send packets that are tagged.
133 * This allows to implement STP support when ports are in a state where
134 * forwarding traffic should be stopped but BPDUs should still be sent.
135 */
136 a5psw_reg_rmw(a5psw, A5PSW_PORT_ENA, mask, reg);
137}
138
139static void a5psw_port_enable_set(struct a5psw *a5psw, int port, bool enable)
140{
141 u32 port_ena = 0;
142
143 if (enable)
144 port_ena |= A5PSW_PORT_ENA_TX_RX(port);
145
146 a5psw_reg_rmw(a5psw, A5PSW_PORT_ENA, A5PSW_PORT_ENA_TX_RX(port),
147 port_ena);
148}
149
150static int a5psw_lk_execute_ctrl(struct a5psw *a5psw, u32 *ctrl)
151{
152 int ret;
153
154 a5psw_reg_writel(a5psw, A5PSW_LK_ADDR_CTRL, *ctrl);
155
156 ret = readl_poll_timeout(a5psw->base + A5PSW_LK_ADDR_CTRL, *ctrl,
157 !(*ctrl & A5PSW_LK_ADDR_CTRL_BUSY),
158 A5PSW_LK_BUSY_USEC_POLL, A5PSW_CTRL_TIMEOUT);
159 if (ret)
160 dev_err(a5psw->dev, "LK_CTRL timeout waiting for BUSY bit\n");
161
162 return ret;
163}
164
165static void a5psw_port_fdb_flush(struct a5psw *a5psw, int port)
166{
167 u32 ctrl = A5PSW_LK_ADDR_CTRL_DELETE_PORT | BIT(port);
168
169 mutex_lock(&a5psw->lk_lock);
170 a5psw_lk_execute_ctrl(a5psw, &ctrl);
171 mutex_unlock(&a5psw->lk_lock);
172}
173
174static void a5psw_port_authorize_set(struct a5psw *a5psw, int port,
175 bool authorize)
176{
177 u32 reg = a5psw_reg_readl(a5psw, A5PSW_AUTH_PORT(port));
178
179 if (authorize)
180 reg |= A5PSW_AUTH_PORT_AUTHORIZED;
181 else
182 reg &= ~A5PSW_AUTH_PORT_AUTHORIZED;
183
184 a5psw_reg_writel(a5psw, A5PSW_AUTH_PORT(port), reg);
185}
186
187static void a5psw_port_disable(struct dsa_switch *ds, int port)
188{
189 struct a5psw *a5psw = ds->priv;
190
191 a5psw_port_authorize_set(a5psw, port, false);
192 a5psw_port_enable_set(a5psw, port, false);
193}
194
195static int a5psw_port_enable(struct dsa_switch *ds, int port,
196 struct phy_device *phy)
197{
198 struct a5psw *a5psw = ds->priv;
199
200 a5psw_port_authorize_set(a5psw, port, true);
201 a5psw_port_enable_set(a5psw, port, true);
202
203 return 0;
204}
205
206static int a5psw_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
207{
208 struct a5psw *a5psw = ds->priv;
209
210 new_mtu += ETH_HLEN + A5PSW_EXTRA_MTU_LEN + ETH_FCS_LEN;
211 a5psw_reg_writel(a5psw, A5PSW_FRM_LENGTH(port), new_mtu);
212
213 return 0;
214}
215
216static int a5psw_port_max_mtu(struct dsa_switch *ds, int port)
217{
218 return A5PSW_MAX_MTU;
219}
220
221static void a5psw_phylink_get_caps(struct dsa_switch *ds, int port,
222 struct phylink_config *config)
223{
224 unsigned long *intf = config->supported_interfaces;
225
226 config->mac_capabilities = MAC_1000FD;
227
228 if (dsa_is_cpu_port(ds, port)) {
229 /* GMII is used internally and GMAC2 is connected to the switch
230 * using 1000Mbps Full-Duplex mode only (cf ethernet manual)
231 */
232 __set_bit(PHY_INTERFACE_MODE_GMII, intf);
233 } else {
234 config->mac_capabilities |= MAC_100 | MAC_10;
235 phy_interface_set_rgmii(intf);
236 __set_bit(PHY_INTERFACE_MODE_RMII, intf);
237 __set_bit(PHY_INTERFACE_MODE_MII, intf);
238 }
239}
240
241static struct phylink_pcs *
242a5psw_phylink_mac_select_pcs(struct phylink_config *config,
243 phy_interface_t interface)
244{
245 struct dsa_port *dp = dsa_phylink_to_port(config);
246 struct a5psw *a5psw = dp->ds->priv;
247
248 if (dsa_port_is_cpu(dp))
249 return NULL;
250
251 return a5psw->pcs[dp->index];
252}
253
254static void a5psw_phylink_mac_config(struct phylink_config *config,
255 unsigned int mode,
256 const struct phylink_link_state *state)
257{
258}
259
260static void a5psw_phylink_mac_link_down(struct phylink_config *config,
261 unsigned int mode,
262 phy_interface_t interface)
263{
264 struct dsa_port *dp = dsa_phylink_to_port(config);
265 struct a5psw *a5psw = dp->ds->priv;
266 int port = dp->index;
267 u32 cmd_cfg;
268
269 cmd_cfg = a5psw_reg_readl(a5psw, A5PSW_CMD_CFG(port));
270 cmd_cfg &= ~(A5PSW_CMD_CFG_RX_ENA | A5PSW_CMD_CFG_TX_ENA);
271 a5psw_reg_writel(a5psw, A5PSW_CMD_CFG(port), cmd_cfg);
272}
273
274static void a5psw_phylink_mac_link_up(struct phylink_config *config,
275 struct phy_device *phydev,
276 unsigned int mode,
277 phy_interface_t interface,
278 int speed, int duplex, bool tx_pause,
279 bool rx_pause)
280{
281 u32 cmd_cfg = A5PSW_CMD_CFG_RX_ENA | A5PSW_CMD_CFG_TX_ENA |
282 A5PSW_CMD_CFG_TX_CRC_APPEND;
283 struct dsa_port *dp = dsa_phylink_to_port(config);
284 struct a5psw *a5psw = dp->ds->priv;
285
286 if (speed == SPEED_1000)
287 cmd_cfg |= A5PSW_CMD_CFG_ETH_SPEED;
288
289 if (duplex == DUPLEX_HALF)
290 cmd_cfg |= A5PSW_CMD_CFG_HD_ENA;
291
292 cmd_cfg |= A5PSW_CMD_CFG_CNTL_FRM_ENA;
293
294 if (!rx_pause)
295 cmd_cfg &= ~A5PSW_CMD_CFG_PAUSE_IGNORE;
296
297 a5psw_reg_writel(a5psw, A5PSW_CMD_CFG(dp->index), cmd_cfg);
298}
299
300static int a5psw_set_ageing_time(struct dsa_switch *ds, unsigned int msecs)
301{
302 struct a5psw *a5psw = ds->priv;
303 unsigned long rate;
304 u64 max, tmp;
305 u32 agetime;
306
307 rate = clk_get_rate(a5psw->clk);
308 max = div64_ul(((u64)A5PSW_LK_AGETIME_MASK * A5PSW_TABLE_ENTRIES * 1024),
309 rate) * 1000;
310 if (msecs > max)
311 return -EINVAL;
312
313 tmp = div_u64(rate, MSEC_PER_SEC);
314 agetime = div_u64(msecs * tmp, 1024 * A5PSW_TABLE_ENTRIES);
315
316 a5psw_reg_writel(a5psw, A5PSW_LK_AGETIME, agetime);
317
318 return 0;
319}
320
321static void a5psw_port_learning_set(struct a5psw *a5psw, int port, bool learn)
322{
323 u32 mask = A5PSW_INPUT_LEARN_DIS(port);
324 u32 reg = !learn ? mask : 0;
325
326 a5psw_reg_rmw(a5psw, A5PSW_INPUT_LEARN, mask, reg);
327}
328
329static void a5psw_port_rx_block_set(struct a5psw *a5psw, int port, bool block)
330{
331 u32 mask = A5PSW_INPUT_LEARN_BLOCK(port);
332 u32 reg = block ? mask : 0;
333
334 a5psw_reg_rmw(a5psw, A5PSW_INPUT_LEARN, mask, reg);
335}
336
337static void a5psw_flooding_set_resolution(struct a5psw *a5psw, int port,
338 bool set)
339{
340 u8 offsets[] = {A5PSW_UCAST_DEF_MASK, A5PSW_BCAST_DEF_MASK,
341 A5PSW_MCAST_DEF_MASK};
342 int i;
343
344 for (i = 0; i < ARRAY_SIZE(offsets); i++)
345 a5psw_reg_rmw(a5psw, offsets[i], BIT(port),
346 set ? BIT(port) : 0);
347}
348
349static void a5psw_port_set_standalone(struct a5psw *a5psw, int port,
350 bool standalone)
351{
352 a5psw_port_learning_set(a5psw, port, !standalone);
353 a5psw_flooding_set_resolution(a5psw, port, !standalone);
354 a5psw_port_mgmtfwd_set(a5psw, port, standalone);
355}
356
357static int a5psw_port_bridge_join(struct dsa_switch *ds, int port,
358 struct dsa_bridge bridge,
359 bool *tx_fwd_offload,
360 struct netlink_ext_ack *extack)
361{
362 struct a5psw *a5psw = ds->priv;
363
364 /* We only support 1 bridge device */
365 if (a5psw->br_dev && bridge.dev != a5psw->br_dev) {
366 NL_SET_ERR_MSG_MOD(extack,
367 "Forwarding offload supported for a single bridge");
368 return -EOPNOTSUPP;
369 }
370
371 a5psw->br_dev = bridge.dev;
372 a5psw_port_set_standalone(a5psw, port, false);
373
374 a5psw->bridged_ports |= BIT(port);
375
376 return 0;
377}
378
379static void a5psw_port_bridge_leave(struct dsa_switch *ds, int port,
380 struct dsa_bridge bridge)
381{
382 struct a5psw *a5psw = ds->priv;
383
384 a5psw->bridged_ports &= ~BIT(port);
385
386 a5psw_port_set_standalone(a5psw, port, true);
387
388 /* No more ports bridged */
389 if (a5psw->bridged_ports == BIT(A5PSW_CPU_PORT))
390 a5psw->br_dev = NULL;
391}
392
393static int a5psw_port_pre_bridge_flags(struct dsa_switch *ds, int port,
394 struct switchdev_brport_flags flags,
395 struct netlink_ext_ack *extack)
396{
397 if (flags.mask & ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD |
398 BR_BCAST_FLOOD))
399 return -EINVAL;
400
401 return 0;
402}
403
404static int
405a5psw_port_bridge_flags(struct dsa_switch *ds, int port,
406 struct switchdev_brport_flags flags,
407 struct netlink_ext_ack *extack)
408{
409 struct a5psw *a5psw = ds->priv;
410 u32 val;
411
412 /* If a port is set as standalone, we do not want to be able to
413 * configure flooding nor learning which would result in joining the
414 * unique bridge. This can happen when a port leaves the bridge, in
415 * which case the DSA core will try to "clear" all flags for the
416 * standalone port (ie enable flooding, disable learning). In that case
417 * do not fail but do not apply the flags.
418 */
419 if (!(a5psw->bridged_ports & BIT(port)))
420 return 0;
421
422 if (flags.mask & BR_LEARNING) {
423 val = flags.val & BR_LEARNING ? 0 : A5PSW_INPUT_LEARN_DIS(port);
424 a5psw_reg_rmw(a5psw, A5PSW_INPUT_LEARN,
425 A5PSW_INPUT_LEARN_DIS(port), val);
426 }
427
428 if (flags.mask & BR_FLOOD) {
429 val = flags.val & BR_FLOOD ? BIT(port) : 0;
430 a5psw_reg_rmw(a5psw, A5PSW_UCAST_DEF_MASK, BIT(port), val);
431 }
432
433 if (flags.mask & BR_MCAST_FLOOD) {
434 val = flags.val & BR_MCAST_FLOOD ? BIT(port) : 0;
435 a5psw_reg_rmw(a5psw, A5PSW_MCAST_DEF_MASK, BIT(port), val);
436 }
437
438 if (flags.mask & BR_BCAST_FLOOD) {
439 val = flags.val & BR_BCAST_FLOOD ? BIT(port) : 0;
440 a5psw_reg_rmw(a5psw, A5PSW_BCAST_DEF_MASK, BIT(port), val);
441 }
442
443 return 0;
444}
445
446static void a5psw_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
447{
448 bool learning_enabled, rx_enabled, tx_enabled;
449 struct dsa_port *dp = dsa_to_port(ds, port);
450 struct a5psw *a5psw = ds->priv;
451
452 switch (state) {
453 case BR_STATE_DISABLED:
454 case BR_STATE_BLOCKING:
455 case BR_STATE_LISTENING:
456 rx_enabled = false;
457 tx_enabled = false;
458 learning_enabled = false;
459 break;
460 case BR_STATE_LEARNING:
461 rx_enabled = false;
462 tx_enabled = false;
463 learning_enabled = dp->learning;
464 break;
465 case BR_STATE_FORWARDING:
466 rx_enabled = true;
467 tx_enabled = true;
468 learning_enabled = dp->learning;
469 break;
470 default:
471 dev_err(ds->dev, "invalid STP state: %d\n", state);
472 return;
473 }
474
475 a5psw_port_learning_set(a5psw, port, learning_enabled);
476 a5psw_port_rx_block_set(a5psw, port, !rx_enabled);
477 a5psw_port_tx_enable(a5psw, port, tx_enabled);
478}
479
480static void a5psw_port_fast_age(struct dsa_switch *ds, int port)
481{
482 struct a5psw *a5psw = ds->priv;
483
484 a5psw_port_fdb_flush(a5psw, port);
485}
486
487static int a5psw_lk_execute_lookup(struct a5psw *a5psw, union lk_data *lk_data,
488 u16 *entry)
489{
490 u32 ctrl;
491 int ret;
492
493 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_LO, lk_data->lo);
494 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_HI, lk_data->hi);
495
496 ctrl = A5PSW_LK_ADDR_CTRL_LOOKUP;
497 ret = a5psw_lk_execute_ctrl(a5psw, &ctrl);
498 if (ret)
499 return ret;
500
501 *entry = ctrl & A5PSW_LK_ADDR_CTRL_ADDRESS;
502
503 return 0;
504}
505
506static int a5psw_port_fdb_add(struct dsa_switch *ds, int port,
507 const unsigned char *addr, u16 vid,
508 struct dsa_db db)
509{
510 struct a5psw *a5psw = ds->priv;
511 union lk_data lk_data = {0};
512 bool inc_learncount = false;
513 int ret = 0;
514 u16 entry;
515 u32 reg;
516
517 ether_addr_copy(lk_data.entry.mac, addr);
518 lk_data.entry.port_mask = BIT(port);
519
520 mutex_lock(&a5psw->lk_lock);
521
522 /* Set the value to be written in the lookup table */
523 ret = a5psw_lk_execute_lookup(a5psw, &lk_data, &entry);
524 if (ret)
525 goto lk_unlock;
526
527 lk_data.hi = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_HI);
528 if (!lk_data.entry.valid) {
529 inc_learncount = true;
530 /* port_mask set to 0x1f when entry is not valid, clear it */
531 lk_data.entry.port_mask = 0;
532 lk_data.entry.prio = 0;
533 }
534
535 lk_data.entry.port_mask |= BIT(port);
536 lk_data.entry.is_static = 1;
537 lk_data.entry.valid = 1;
538
539 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_HI, lk_data.hi);
540
541 reg = A5PSW_LK_ADDR_CTRL_WRITE | entry;
542 ret = a5psw_lk_execute_ctrl(a5psw, ®);
543 if (ret)
544 goto lk_unlock;
545
546 if (inc_learncount) {
547 reg = A5PSW_LK_LEARNCOUNT_MODE_INC;
548 a5psw_reg_writel(a5psw, A5PSW_LK_LEARNCOUNT, reg);
549 }
550
551lk_unlock:
552 mutex_unlock(&a5psw->lk_lock);
553
554 return ret;
555}
556
557static int a5psw_port_fdb_del(struct dsa_switch *ds, int port,
558 const unsigned char *addr, u16 vid,
559 struct dsa_db db)
560{
561 struct a5psw *a5psw = ds->priv;
562 union lk_data lk_data = {0};
563 bool clear = false;
564 u16 entry;
565 u32 reg;
566 int ret;
567
568 ether_addr_copy(lk_data.entry.mac, addr);
569
570 mutex_lock(&a5psw->lk_lock);
571
572 ret = a5psw_lk_execute_lookup(a5psw, &lk_data, &entry);
573 if (ret)
574 goto lk_unlock;
575
576 lk_data.hi = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_HI);
577
578 /* Our hardware does not associate any VID to the FDB entries so this
579 * means that if two entries were added for the same mac but for
580 * different VID, then, on the deletion of the first one, we would also
581 * delete the second one. Since there is unfortunately nothing we can do
582 * about that, do not return an error...
583 */
584 if (!lk_data.entry.valid)
585 goto lk_unlock;
586
587 lk_data.entry.port_mask &= ~BIT(port);
588 /* If there is no more port in the mask, clear the entry */
589 if (lk_data.entry.port_mask == 0)
590 clear = true;
591
592 a5psw_reg_writel(a5psw, A5PSW_LK_DATA_HI, lk_data.hi);
593
594 reg = entry;
595 if (clear)
596 reg |= A5PSW_LK_ADDR_CTRL_CLEAR;
597 else
598 reg |= A5PSW_LK_ADDR_CTRL_WRITE;
599
600 ret = a5psw_lk_execute_ctrl(a5psw, ®);
601 if (ret)
602 goto lk_unlock;
603
604 /* Decrement LEARNCOUNT */
605 if (clear) {
606 reg = A5PSW_LK_LEARNCOUNT_MODE_DEC;
607 a5psw_reg_writel(a5psw, A5PSW_LK_LEARNCOUNT, reg);
608 }
609
610lk_unlock:
611 mutex_unlock(&a5psw->lk_lock);
612
613 return ret;
614}
615
616static int a5psw_port_fdb_dump(struct dsa_switch *ds, int port,
617 dsa_fdb_dump_cb_t *cb, void *data)
618{
619 struct a5psw *a5psw = ds->priv;
620 union lk_data lk_data;
621 int i = 0, ret = 0;
622 u32 reg;
623
624 mutex_lock(&a5psw->lk_lock);
625
626 for (i = 0; i < A5PSW_TABLE_ENTRIES; i++) {
627 reg = A5PSW_LK_ADDR_CTRL_READ | A5PSW_LK_ADDR_CTRL_WAIT | i;
628
629 ret = a5psw_lk_execute_ctrl(a5psw, ®);
630 if (ret)
631 goto out_unlock;
632
633 lk_data.hi = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_HI);
634 /* If entry is not valid or does not contain the port, skip */
635 if (!lk_data.entry.valid ||
636 !(lk_data.entry.port_mask & BIT(port)))
637 continue;
638
639 lk_data.lo = a5psw_reg_readl(a5psw, A5PSW_LK_DATA_LO);
640
641 ret = cb(lk_data.entry.mac, 0, lk_data.entry.is_static, data);
642 if (ret)
643 goto out_unlock;
644 }
645
646out_unlock:
647 mutex_unlock(&a5psw->lk_lock);
648
649 return ret;
650}
651
652static int a5psw_port_vlan_filtering(struct dsa_switch *ds, int port,
653 bool vlan_filtering,
654 struct netlink_ext_ack *extack)
655{
656 u32 mask = BIT(port + A5PSW_VLAN_VERI_SHIFT) |
657 BIT(port + A5PSW_VLAN_DISC_SHIFT);
658 u32 val = vlan_filtering ? mask : 0;
659 struct a5psw *a5psw = ds->priv;
660
661 /* Disable/enable vlan tagging */
662 a5psw_reg_rmw(a5psw, A5PSW_VLAN_IN_MODE_ENA, BIT(port),
663 vlan_filtering ? BIT(port) : 0);
664
665 /* Disable/enable vlan input filtering */
666 a5psw_reg_rmw(a5psw, A5PSW_VLAN_VERIFY, mask, val);
667
668 return 0;
669}
670
671static int a5psw_find_vlan_entry(struct a5psw *a5psw, u16 vid)
672{
673 u32 vlan_res;
674 int i;
675
676 /* Find vlan for this port */
677 for (i = 0; i < A5PSW_VLAN_COUNT; i++) {
678 vlan_res = a5psw_reg_readl(a5psw, A5PSW_VLAN_RES(i));
679 if (FIELD_GET(A5PSW_VLAN_RES_VLANID, vlan_res) == vid)
680 return i;
681 }
682
683 return -1;
684}
685
686static int a5psw_new_vlan_res_entry(struct a5psw *a5psw, u16 newvid)
687{
688 u32 vlan_res;
689 int i;
690
691 /* Find a free VLAN entry */
692 for (i = 0; i < A5PSW_VLAN_COUNT; i++) {
693 vlan_res = a5psw_reg_readl(a5psw, A5PSW_VLAN_RES(i));
694 if (!(FIELD_GET(A5PSW_VLAN_RES_PORTMASK, vlan_res))) {
695 vlan_res = FIELD_PREP(A5PSW_VLAN_RES_VLANID, newvid);
696 a5psw_reg_writel(a5psw, A5PSW_VLAN_RES(i), vlan_res);
697 return i;
698 }
699 }
700
701 return -1;
702}
703
704static void a5psw_port_vlan_tagged_cfg(struct a5psw *a5psw,
705 unsigned int vlan_res_id, int port,
706 bool set)
707{
708 u32 mask = A5PSW_VLAN_RES_WR_PORTMASK | A5PSW_VLAN_RES_RD_TAGMASK |
709 BIT(port);
710 u32 vlan_res_off = A5PSW_VLAN_RES(vlan_res_id);
711 u32 val = A5PSW_VLAN_RES_WR_TAGMASK, reg;
712
713 if (set)
714 val |= BIT(port);
715
716 /* Toggle tag mask read */
717 a5psw_reg_writel(a5psw, vlan_res_off, A5PSW_VLAN_RES_RD_TAGMASK);
718 reg = a5psw_reg_readl(a5psw, vlan_res_off);
719 a5psw_reg_writel(a5psw, vlan_res_off, A5PSW_VLAN_RES_RD_TAGMASK);
720
721 reg &= ~mask;
722 reg |= val;
723 a5psw_reg_writel(a5psw, vlan_res_off, reg);
724}
725
726static void a5psw_port_vlan_cfg(struct a5psw *a5psw, unsigned int vlan_res_id,
727 int port, bool set)
728{
729 u32 mask = A5PSW_VLAN_RES_WR_TAGMASK | BIT(port);
730 u32 reg = A5PSW_VLAN_RES_WR_PORTMASK;
731
732 if (set)
733 reg |= BIT(port);
734
735 a5psw_reg_rmw(a5psw, A5PSW_VLAN_RES(vlan_res_id), mask, reg);
736}
737
738static int a5psw_port_vlan_add(struct dsa_switch *ds, int port,
739 const struct switchdev_obj_port_vlan *vlan,
740 struct netlink_ext_ack *extack)
741{
742 bool tagged = !(vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED);
743 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
744 struct a5psw *a5psw = ds->priv;
745 u16 vid = vlan->vid;
746 int vlan_res_id;
747
748 vlan_res_id = a5psw_find_vlan_entry(a5psw, vid);
749 if (vlan_res_id < 0) {
750 vlan_res_id = a5psw_new_vlan_res_entry(a5psw, vid);
751 if (vlan_res_id < 0)
752 return -ENOSPC;
753 }
754
755 a5psw_port_vlan_cfg(a5psw, vlan_res_id, port, true);
756 if (tagged)
757 a5psw_port_vlan_tagged_cfg(a5psw, vlan_res_id, port, true);
758
759 /* Configure port to tag with corresponding VID, but do not enable it
760 * yet: wait for vlan filtering to be enabled to enable vlan port
761 * tagging
762 */
763 if (pvid)
764 a5psw_reg_writel(a5psw, A5PSW_SYSTEM_TAGINFO(port), vid);
765
766 return 0;
767}
768
769static int a5psw_port_vlan_del(struct dsa_switch *ds, int port,
770 const struct switchdev_obj_port_vlan *vlan)
771{
772 struct a5psw *a5psw = ds->priv;
773 u16 vid = vlan->vid;
774 int vlan_res_id;
775
776 vlan_res_id = a5psw_find_vlan_entry(a5psw, vid);
777 if (vlan_res_id < 0)
778 return -EINVAL;
779
780 a5psw_port_vlan_cfg(a5psw, vlan_res_id, port, false);
781 a5psw_port_vlan_tagged_cfg(a5psw, vlan_res_id, port, false);
782
783 return 0;
784}
785
786static u64 a5psw_read_stat(struct a5psw *a5psw, u32 offset, int port)
787{
788 u32 reg_lo, reg_hi;
789
790 reg_lo = a5psw_reg_readl(a5psw, offset + A5PSW_PORT_OFFSET(port));
791 /* A5PSW_STATS_HIWORD is latched on stat read */
792 reg_hi = a5psw_reg_readl(a5psw, A5PSW_STATS_HIWORD);
793
794 return ((u64)reg_hi << 32) | reg_lo;
795}
796
797static void a5psw_get_strings(struct dsa_switch *ds, int port, u32 stringset,
798 uint8_t *data)
799{
800 unsigned int u;
801
802 if (stringset != ETH_SS_STATS)
803 return;
804
805 for (u = 0; u < ARRAY_SIZE(a5psw_stats); u++)
806 ethtool_puts(&data, a5psw_stats[u].name);
807}
808
809static void a5psw_get_ethtool_stats(struct dsa_switch *ds, int port,
810 uint64_t *data)
811{
812 struct a5psw *a5psw = ds->priv;
813 unsigned int u;
814
815 for (u = 0; u < ARRAY_SIZE(a5psw_stats); u++)
816 data[u] = a5psw_read_stat(a5psw, a5psw_stats[u].offset, port);
817}
818
819static int a5psw_get_sset_count(struct dsa_switch *ds, int port, int sset)
820{
821 if (sset != ETH_SS_STATS)
822 return 0;
823
824 return ARRAY_SIZE(a5psw_stats);
825}
826
827static void a5psw_get_eth_mac_stats(struct dsa_switch *ds, int port,
828 struct ethtool_eth_mac_stats *mac_stats)
829{
830 struct a5psw *a5psw = ds->priv;
831
832#define RD(name) a5psw_read_stat(a5psw, A5PSW_##name, port)
833 mac_stats->FramesTransmittedOK = RD(aFramesTransmittedOK);
834 mac_stats->SingleCollisionFrames = RD(aSingleCollisions);
835 mac_stats->MultipleCollisionFrames = RD(aMultipleCollisions);
836 mac_stats->FramesReceivedOK = RD(aFramesReceivedOK);
837 mac_stats->FrameCheckSequenceErrors = RD(aFrameCheckSequenceErrors);
838 mac_stats->AlignmentErrors = RD(aAlignmentErrors);
839 mac_stats->OctetsTransmittedOK = RD(aOctetsTransmittedOK);
840 mac_stats->FramesWithDeferredXmissions = RD(aDeferred);
841 mac_stats->LateCollisions = RD(aLateCollisions);
842 mac_stats->FramesAbortedDueToXSColls = RD(aExcessiveCollisions);
843 mac_stats->FramesLostDueToIntMACXmitError = RD(ifOutErrors);
844 mac_stats->CarrierSenseErrors = RD(aCarrierSenseErrors);
845 mac_stats->OctetsReceivedOK = RD(aOctetsReceivedOK);
846 mac_stats->FramesLostDueToIntMACRcvError = RD(ifInErrors);
847 mac_stats->MulticastFramesXmittedOK = RD(ifOutMulticastPkts);
848 mac_stats->BroadcastFramesXmittedOK = RD(ifOutBroadcastPkts);
849 mac_stats->FramesWithExcessiveDeferral = RD(aDeferred);
850 mac_stats->MulticastFramesReceivedOK = RD(ifInMulticastPkts);
851 mac_stats->BroadcastFramesReceivedOK = RD(ifInBroadcastPkts);
852#undef RD
853}
854
855static const struct ethtool_rmon_hist_range a5psw_rmon_ranges[] = {
856 { 0, 64 },
857 { 65, 127 },
858 { 128, 255 },
859 { 256, 511 },
860 { 512, 1023 },
861 { 1024, 1518 },
862 { 1519, A5PSW_MAX_MTU },
863 {}
864};
865
866static void a5psw_get_rmon_stats(struct dsa_switch *ds, int port,
867 struct ethtool_rmon_stats *rmon_stats,
868 const struct ethtool_rmon_hist_range **ranges)
869{
870 struct a5psw *a5psw = ds->priv;
871
872#define RD(name) a5psw_read_stat(a5psw, A5PSW_##name, port)
873 rmon_stats->undersize_pkts = RD(etherStatsUndersizePkts);
874 rmon_stats->oversize_pkts = RD(etherStatsOversizePkts);
875 rmon_stats->fragments = RD(etherStatsFragments);
876 rmon_stats->jabbers = RD(etherStatsJabbers);
877 rmon_stats->hist[0] = RD(etherStatsPkts64Octets);
878 rmon_stats->hist[1] = RD(etherStatsPkts65to127Octets);
879 rmon_stats->hist[2] = RD(etherStatsPkts128to255Octets);
880 rmon_stats->hist[3] = RD(etherStatsPkts256to511Octets);
881 rmon_stats->hist[4] = RD(etherStatsPkts512to1023Octets);
882 rmon_stats->hist[5] = RD(etherStatsPkts1024to1518Octets);
883 rmon_stats->hist[6] = RD(etherStatsPkts1519toXOctets);
884#undef RD
885
886 *ranges = a5psw_rmon_ranges;
887}
888
889static void a5psw_get_eth_ctrl_stats(struct dsa_switch *ds, int port,
890 struct ethtool_eth_ctrl_stats *ctrl_stats)
891{
892 struct a5psw *a5psw = ds->priv;
893 u64 stat;
894
895 stat = a5psw_read_stat(a5psw, A5PSW_aTxPAUSEMACCtrlFrames, port);
896 ctrl_stats->MACControlFramesTransmitted = stat;
897 stat = a5psw_read_stat(a5psw, A5PSW_aRxPAUSEMACCtrlFrames, port);
898 ctrl_stats->MACControlFramesReceived = stat;
899}
900
901static void a5psw_vlan_setup(struct a5psw *a5psw, int port)
902{
903 u32 reg;
904
905 /* Enable TAG always mode for the port, this is actually controlled
906 * by VLAN_IN_MODE_ENA field which will be used for PVID insertion
907 */
908 reg = A5PSW_VLAN_IN_MODE_TAG_ALWAYS;
909 reg <<= A5PSW_VLAN_IN_MODE_PORT_SHIFT(port);
910 a5psw_reg_rmw(a5psw, A5PSW_VLAN_IN_MODE, A5PSW_VLAN_IN_MODE_PORT(port),
911 reg);
912
913 /* Set transparent mode for output frame manipulation, this will depend
914 * on the VLAN_RES configuration mode
915 */
916 reg = A5PSW_VLAN_OUT_MODE_TRANSPARENT;
917 reg <<= A5PSW_VLAN_OUT_MODE_PORT_SHIFT(port);
918 a5psw_reg_rmw(a5psw, A5PSW_VLAN_OUT_MODE,
919 A5PSW_VLAN_OUT_MODE_PORT(port), reg);
920}
921
922static int a5psw_setup(struct dsa_switch *ds)
923{
924 struct a5psw *a5psw = ds->priv;
925 int port, vlan, ret;
926 struct dsa_port *dp;
927 u32 reg;
928
929 /* Validate that there is only 1 CPU port with index A5PSW_CPU_PORT */
930 dsa_switch_for_each_cpu_port(dp, ds) {
931 if (dp->index != A5PSW_CPU_PORT) {
932 dev_err(a5psw->dev, "Invalid CPU port\n");
933 return -EINVAL;
934 }
935 }
936
937 /* Configure management port */
938 reg = A5PSW_CPU_PORT | A5PSW_MGMT_CFG_ENABLE;
939 a5psw_reg_writel(a5psw, A5PSW_MGMT_CFG, reg);
940
941 /* Set pattern 0 to forward all frame to mgmt port */
942 a5psw_reg_writel(a5psw, A5PSW_PATTERN_CTRL(A5PSW_PATTERN_MGMTFWD),
943 A5PSW_PATTERN_CTRL_MGMTFWD);
944
945 /* Enable port tagging */
946 reg = FIELD_PREP(A5PSW_MGMT_TAG_CFG_TAGFIELD, ETH_P_DSA_A5PSW);
947 reg |= A5PSW_MGMT_TAG_CFG_ENABLE | A5PSW_MGMT_TAG_CFG_ALL_FRAMES;
948 a5psw_reg_writel(a5psw, A5PSW_MGMT_TAG_CFG, reg);
949
950 /* Enable normal switch operation */
951 reg = A5PSW_LK_ADDR_CTRL_BLOCKING | A5PSW_LK_ADDR_CTRL_LEARNING |
952 A5PSW_LK_ADDR_CTRL_AGEING | A5PSW_LK_ADDR_CTRL_ALLOW_MIGR |
953 A5PSW_LK_ADDR_CTRL_CLEAR_TABLE;
954 a5psw_reg_writel(a5psw, A5PSW_LK_CTRL, reg);
955
956 ret = readl_poll_timeout(a5psw->base + A5PSW_LK_CTRL, reg,
957 !(reg & A5PSW_LK_ADDR_CTRL_CLEAR_TABLE),
958 A5PSW_LK_BUSY_USEC_POLL, A5PSW_CTRL_TIMEOUT);
959 if (ret) {
960 dev_err(a5psw->dev, "Failed to clear lookup table\n");
961 return ret;
962 }
963
964 /* Reset learn count to 0 */
965 reg = A5PSW_LK_LEARNCOUNT_MODE_SET;
966 a5psw_reg_writel(a5psw, A5PSW_LK_LEARNCOUNT, reg);
967
968 /* Clear VLAN resource table */
969 reg = A5PSW_VLAN_RES_WR_PORTMASK | A5PSW_VLAN_RES_WR_TAGMASK;
970 for (vlan = 0; vlan < A5PSW_VLAN_COUNT; vlan++)
971 a5psw_reg_writel(a5psw, A5PSW_VLAN_RES(vlan), reg);
972
973 /* Reset all ports */
974 dsa_switch_for_each_port(dp, ds) {
975 port = dp->index;
976
977 /* Reset the port */
978 a5psw_reg_writel(a5psw, A5PSW_CMD_CFG(port),
979 A5PSW_CMD_CFG_SW_RESET);
980
981 /* Enable only CPU port */
982 a5psw_port_enable_set(a5psw, port, dsa_port_is_cpu(dp));
983
984 if (dsa_port_is_unused(dp))
985 continue;
986
987 /* Enable egress flooding and learning for CPU port */
988 if (dsa_port_is_cpu(dp)) {
989 a5psw_flooding_set_resolution(a5psw, port, true);
990 a5psw_port_learning_set(a5psw, port, true);
991 }
992
993 /* Enable standalone mode for user ports */
994 if (dsa_port_is_user(dp))
995 a5psw_port_set_standalone(a5psw, port, true);
996
997 a5psw_vlan_setup(a5psw, port);
998 }
999
1000 return 0;
1001}
1002
1003static const struct phylink_mac_ops a5psw_phylink_mac_ops = {
1004 .mac_select_pcs = a5psw_phylink_mac_select_pcs,
1005 .mac_config = a5psw_phylink_mac_config,
1006 .mac_link_down = a5psw_phylink_mac_link_down,
1007 .mac_link_up = a5psw_phylink_mac_link_up,
1008};
1009
1010static const struct dsa_switch_ops a5psw_switch_ops = {
1011 .get_tag_protocol = a5psw_get_tag_protocol,
1012 .setup = a5psw_setup,
1013 .port_disable = a5psw_port_disable,
1014 .port_enable = a5psw_port_enable,
1015 .phylink_get_caps = a5psw_phylink_get_caps,
1016 .port_change_mtu = a5psw_port_change_mtu,
1017 .port_max_mtu = a5psw_port_max_mtu,
1018 .get_sset_count = a5psw_get_sset_count,
1019 .get_strings = a5psw_get_strings,
1020 .get_ethtool_stats = a5psw_get_ethtool_stats,
1021 .get_eth_mac_stats = a5psw_get_eth_mac_stats,
1022 .get_eth_ctrl_stats = a5psw_get_eth_ctrl_stats,
1023 .get_rmon_stats = a5psw_get_rmon_stats,
1024 .set_ageing_time = a5psw_set_ageing_time,
1025 .port_bridge_join = a5psw_port_bridge_join,
1026 .port_bridge_leave = a5psw_port_bridge_leave,
1027 .port_pre_bridge_flags = a5psw_port_pre_bridge_flags,
1028 .port_bridge_flags = a5psw_port_bridge_flags,
1029 .port_stp_state_set = a5psw_port_stp_state_set,
1030 .port_fast_age = a5psw_port_fast_age,
1031 .port_vlan_filtering = a5psw_port_vlan_filtering,
1032 .port_vlan_add = a5psw_port_vlan_add,
1033 .port_vlan_del = a5psw_port_vlan_del,
1034 .port_fdb_add = a5psw_port_fdb_add,
1035 .port_fdb_del = a5psw_port_fdb_del,
1036 .port_fdb_dump = a5psw_port_fdb_dump,
1037};
1038
1039static int a5psw_mdio_wait_busy(struct a5psw *a5psw)
1040{
1041 u32 status;
1042 int err;
1043
1044 err = readl_poll_timeout(a5psw->base + A5PSW_MDIO_CFG_STATUS, status,
1045 !(status & A5PSW_MDIO_CFG_STATUS_BUSY), 10,
1046 1000 * USEC_PER_MSEC);
1047 if (err)
1048 dev_err(a5psw->dev, "MDIO command timeout\n");
1049
1050 return err;
1051}
1052
1053static int a5psw_mdio_read(struct mii_bus *bus, int phy_id, int phy_reg)
1054{
1055 struct a5psw *a5psw = bus->priv;
1056 u32 cmd, status;
1057 int ret;
1058
1059 cmd = A5PSW_MDIO_COMMAND_READ;
1060 cmd |= FIELD_PREP(A5PSW_MDIO_COMMAND_REG_ADDR, phy_reg);
1061 cmd |= FIELD_PREP(A5PSW_MDIO_COMMAND_PHY_ADDR, phy_id);
1062
1063 a5psw_reg_writel(a5psw, A5PSW_MDIO_COMMAND, cmd);
1064
1065 ret = a5psw_mdio_wait_busy(a5psw);
1066 if (ret)
1067 return ret;
1068
1069 ret = a5psw_reg_readl(a5psw, A5PSW_MDIO_DATA) & A5PSW_MDIO_DATA_MASK;
1070
1071 status = a5psw_reg_readl(a5psw, A5PSW_MDIO_CFG_STATUS);
1072 if (status & A5PSW_MDIO_CFG_STATUS_READERR)
1073 return -EIO;
1074
1075 return ret;
1076}
1077
1078static int a5psw_mdio_write(struct mii_bus *bus, int phy_id, int phy_reg,
1079 u16 phy_data)
1080{
1081 struct a5psw *a5psw = bus->priv;
1082 u32 cmd;
1083
1084 cmd = FIELD_PREP(A5PSW_MDIO_COMMAND_REG_ADDR, phy_reg);
1085 cmd |= FIELD_PREP(A5PSW_MDIO_COMMAND_PHY_ADDR, phy_id);
1086
1087 a5psw_reg_writel(a5psw, A5PSW_MDIO_COMMAND, cmd);
1088 a5psw_reg_writel(a5psw, A5PSW_MDIO_DATA, phy_data);
1089
1090 return a5psw_mdio_wait_busy(a5psw);
1091}
1092
1093static int a5psw_mdio_config(struct a5psw *a5psw, u32 mdio_freq)
1094{
1095 unsigned long rate;
1096 unsigned long div;
1097 u32 cfgstatus;
1098
1099 rate = clk_get_rate(a5psw->hclk);
1100 div = ((rate / mdio_freq) / 2);
1101 if (div > FIELD_MAX(A5PSW_MDIO_CFG_STATUS_CLKDIV) ||
1102 div < A5PSW_MDIO_CLK_DIV_MIN) {
1103 dev_err(a5psw->dev, "MDIO clock div %ld out of range\n", div);
1104 return -ERANGE;
1105 }
1106
1107 cfgstatus = FIELD_PREP(A5PSW_MDIO_CFG_STATUS_CLKDIV, div);
1108
1109 a5psw_reg_writel(a5psw, A5PSW_MDIO_CFG_STATUS, cfgstatus);
1110
1111 return 0;
1112}
1113
1114static int a5psw_probe_mdio(struct a5psw *a5psw, struct device_node *node)
1115{
1116 struct device *dev = a5psw->dev;
1117 struct mii_bus *bus;
1118 u32 mdio_freq;
1119 int ret;
1120
1121 if (of_property_read_u32(node, "clock-frequency", &mdio_freq))
1122 mdio_freq = A5PSW_MDIO_DEF_FREQ;
1123
1124 ret = a5psw_mdio_config(a5psw, mdio_freq);
1125 if (ret)
1126 return ret;
1127
1128 bus = devm_mdiobus_alloc(dev);
1129 if (!bus)
1130 return -ENOMEM;
1131
1132 bus->name = "a5psw_mdio";
1133 bus->read = a5psw_mdio_read;
1134 bus->write = a5psw_mdio_write;
1135 bus->priv = a5psw;
1136 bus->parent = dev;
1137 snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
1138
1139 a5psw->mii_bus = bus;
1140
1141 return devm_of_mdiobus_register(dev, bus, node);
1142}
1143
1144static void a5psw_pcs_free(struct a5psw *a5psw)
1145{
1146 int i;
1147
1148 for (i = 0; i < ARRAY_SIZE(a5psw->pcs); i++) {
1149 if (a5psw->pcs[i])
1150 miic_destroy(a5psw->pcs[i]);
1151 }
1152}
1153
1154static int a5psw_pcs_get(struct a5psw *a5psw)
1155{
1156 struct device_node *ports, *port, *pcs_node;
1157 struct phylink_pcs *pcs;
1158 int ret;
1159 u32 reg;
1160
1161 ports = of_get_child_by_name(a5psw->dev->of_node, "ethernet-ports");
1162 if (!ports)
1163 return -EINVAL;
1164
1165 for_each_available_child_of_node(ports, port) {
1166 pcs_node = of_parse_phandle(port, "pcs-handle", 0);
1167 if (!pcs_node)
1168 continue;
1169
1170 if (of_property_read_u32(port, "reg", ®)) {
1171 ret = -EINVAL;
1172 goto free_pcs;
1173 }
1174
1175 if (reg >= ARRAY_SIZE(a5psw->pcs)) {
1176 ret = -ENODEV;
1177 goto free_pcs;
1178 }
1179
1180 pcs = miic_create(a5psw->dev, pcs_node);
1181 if (IS_ERR(pcs)) {
1182 dev_err(a5psw->dev, "Failed to create PCS for port %d\n",
1183 reg);
1184 ret = PTR_ERR(pcs);
1185 goto free_pcs;
1186 }
1187
1188 a5psw->pcs[reg] = pcs;
1189 of_node_put(pcs_node);
1190 }
1191 of_node_put(ports);
1192
1193 return 0;
1194
1195free_pcs:
1196 of_node_put(pcs_node);
1197 of_node_put(port);
1198 of_node_put(ports);
1199 a5psw_pcs_free(a5psw);
1200
1201 return ret;
1202}
1203
1204static int a5psw_probe(struct platform_device *pdev)
1205{
1206 struct device *dev = &pdev->dev;
1207 struct device_node *mdio;
1208 struct dsa_switch *ds;
1209 struct a5psw *a5psw;
1210 int ret;
1211
1212 a5psw = devm_kzalloc(dev, sizeof(*a5psw), GFP_KERNEL);
1213 if (!a5psw)
1214 return -ENOMEM;
1215
1216 a5psw->dev = dev;
1217 mutex_init(&a5psw->lk_lock);
1218 spin_lock_init(&a5psw->reg_lock);
1219 a5psw->base = devm_platform_ioremap_resource(pdev, 0);
1220 if (IS_ERR(a5psw->base))
1221 return PTR_ERR(a5psw->base);
1222
1223 a5psw->bridged_ports = BIT(A5PSW_CPU_PORT);
1224
1225 ret = a5psw_pcs_get(a5psw);
1226 if (ret)
1227 return ret;
1228
1229 a5psw->hclk = devm_clk_get(dev, "hclk");
1230 if (IS_ERR(a5psw->hclk)) {
1231 dev_err(dev, "failed get hclk clock\n");
1232 ret = PTR_ERR(a5psw->hclk);
1233 goto free_pcs;
1234 }
1235
1236 a5psw->clk = devm_clk_get(dev, "clk");
1237 if (IS_ERR(a5psw->clk)) {
1238 dev_err(dev, "failed get clk_switch clock\n");
1239 ret = PTR_ERR(a5psw->clk);
1240 goto free_pcs;
1241 }
1242
1243 ret = clk_prepare_enable(a5psw->clk);
1244 if (ret)
1245 goto free_pcs;
1246
1247 ret = clk_prepare_enable(a5psw->hclk);
1248 if (ret)
1249 goto clk_disable;
1250
1251 mdio = of_get_child_by_name(dev->of_node, "mdio");
1252 if (of_device_is_available(mdio)) {
1253 ret = a5psw_probe_mdio(a5psw, mdio);
1254 if (ret) {
1255 of_node_put(mdio);
1256 dev_err(dev, "Failed to register MDIO: %d\n", ret);
1257 goto hclk_disable;
1258 }
1259 }
1260
1261 of_node_put(mdio);
1262
1263 ds = &a5psw->ds;
1264 ds->dev = dev;
1265 ds->num_ports = A5PSW_PORTS_NUM;
1266 ds->ops = &a5psw_switch_ops;
1267 ds->phylink_mac_ops = &a5psw_phylink_mac_ops;
1268 ds->priv = a5psw;
1269
1270 ret = dsa_register_switch(ds);
1271 if (ret) {
1272 dev_err(dev, "Failed to register DSA switch: %d\n", ret);
1273 goto hclk_disable;
1274 }
1275
1276 return 0;
1277
1278hclk_disable:
1279 clk_disable_unprepare(a5psw->hclk);
1280clk_disable:
1281 clk_disable_unprepare(a5psw->clk);
1282free_pcs:
1283 a5psw_pcs_free(a5psw);
1284
1285 return ret;
1286}
1287
1288static void a5psw_remove(struct platform_device *pdev)
1289{
1290 struct a5psw *a5psw = platform_get_drvdata(pdev);
1291
1292 if (!a5psw)
1293 return;
1294
1295 dsa_unregister_switch(&a5psw->ds);
1296 a5psw_pcs_free(a5psw);
1297 clk_disable_unprepare(a5psw->hclk);
1298 clk_disable_unprepare(a5psw->clk);
1299}
1300
1301static void a5psw_shutdown(struct platform_device *pdev)
1302{
1303 struct a5psw *a5psw = platform_get_drvdata(pdev);
1304
1305 if (!a5psw)
1306 return;
1307
1308 dsa_switch_shutdown(&a5psw->ds);
1309
1310 platform_set_drvdata(pdev, NULL);
1311}
1312
1313static const struct of_device_id a5psw_of_mtable[] = {
1314 { .compatible = "renesas,rzn1-a5psw", },
1315 { /* sentinel */ },
1316};
1317MODULE_DEVICE_TABLE(of, a5psw_of_mtable);
1318
1319static struct platform_driver a5psw_driver = {
1320 .driver = {
1321 .name = "rzn1_a5psw",
1322 .of_match_table = a5psw_of_mtable,
1323 },
1324 .probe = a5psw_probe,
1325 .remove = a5psw_remove,
1326 .shutdown = a5psw_shutdown,
1327};
1328module_platform_driver(a5psw_driver);
1329
1330MODULE_LICENSE("GPL");
1331MODULE_DESCRIPTION("Renesas RZ/N1 Advanced 5-port Switch driver");
1332MODULE_AUTHOR("Clément Léger <clement.leger@bootlin.com>");