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[openwrt.git] / target / linux / generic / files / drivers / net / phy / ar8216.c
1 /*
2 * ar8216.c: AR8216 switch driver
3 *
4 * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
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/if.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/list.h>
21 #include <linux/if_ether.h>
22 #include <linux/skbuff.h>
23 #include <linux/netdevice.h>
24 #include <linux/netlink.h>
25 #include <linux/bitops.h>
26 #include <net/genetlink.h>
27 #include <linux/switch.h>
28 #include <linux/delay.h>
29 #include <linux/phy.h>
30 #include <linux/netdevice.h>
31 #include <linux/etherdevice.h>
32 #include <linux/lockdep.h>
33 #include "ar8216.h"
34
35 /* size of the vlan table */
36 #define AR8X16_MAX_VLANS 128
37 #define AR8X16_PROBE_RETRIES 10
38
39 struct ar8216_priv {
40 struct switch_dev dev;
41 struct phy_device *phy;
42 u32 (*read)(struct ar8216_priv *priv, int reg);
43 void (*write)(struct ar8216_priv *priv, int reg, u32 val);
44 const struct net_device_ops *ndo_old;
45 struct net_device_ops ndo;
46 struct mutex reg_mutex;
47 int chip;
48 bool initialized;
49 bool port4_phy;
50 char buf[80];
51
52 bool init;
53
54 /* all fields below are cleared on reset */
55 bool vlan;
56 u16 vlan_id[AR8X16_MAX_VLANS];
57 u8 vlan_table[AR8X16_MAX_VLANS];
58 u8 vlan_tagged;
59 u16 pvid[AR8216_NUM_PORTS];
60 };
61
62 #define to_ar8216(_dev) container_of(_dev, struct ar8216_priv, dev)
63
64 static inline void
65 split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
66 {
67 regaddr >>= 1;
68 *r1 = regaddr & 0x1e;
69
70 regaddr >>= 5;
71 *r2 = regaddr & 0x7;
72
73 regaddr >>= 3;
74 *page = regaddr & 0x1ff;
75 }
76
77 static u32
78 ar8216_mii_read(struct ar8216_priv *priv, int reg)
79 {
80 struct phy_device *phy = priv->phy;
81 struct mii_bus *bus = phy->bus;
82 u16 r1, r2, page;
83 u16 lo, hi;
84
85 split_addr((u32) reg, &r1, &r2, &page);
86
87 mutex_lock(&bus->mdio_lock);
88
89 bus->write(bus, 0x18, 0, page);
90 msleep(1); /* wait for the page switch to propagate */
91 lo = bus->read(bus, 0x10 | r2, r1);
92 hi = bus->read(bus, 0x10 | r2, r1 + 1);
93
94 mutex_unlock(&bus->mdio_lock);
95
96 return (hi << 16) | lo;
97 }
98
99 static void
100 ar8216_mii_write(struct ar8216_priv *priv, int reg, u32 val)
101 {
102 struct phy_device *phy = priv->phy;
103 struct mii_bus *bus = phy->bus;
104 u16 r1, r2, r3;
105 u16 lo, hi;
106
107 split_addr((u32) reg, &r1, &r2, &r3);
108 lo = val & 0xffff;
109 hi = (u16) (val >> 16);
110
111 mutex_lock(&bus->mdio_lock);
112
113 bus->write(bus, 0x18, 0, r3);
114 msleep(1); /* wait for the page switch to propagate */
115 bus->write(bus, 0x10 | r2, r1 + 1, hi);
116 bus->write(bus, 0x10 | r2, r1, lo);
117
118 mutex_unlock(&bus->mdio_lock);
119 }
120
121 static void
122 ar8216_phy_dbg_write(struct ar8216_priv *priv, int phy_addr,
123 u16 dbg_addr, u16 dbg_data)
124 {
125 struct mii_bus *bus = priv->phy->bus;
126
127 mutex_lock(&bus->mdio_lock);
128 bus->write(bus, phy_addr, MII_ATH_DBG_ADDR, dbg_addr);
129 bus->write(bus, phy_addr, MII_ATH_DBG_DATA, dbg_data);
130 mutex_unlock(&bus->mdio_lock);
131 }
132
133 static u32
134 ar8216_rmw(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
135 {
136 u32 v;
137
138 lockdep_assert_held(&priv->reg_mutex);
139
140 v = priv->read(priv, reg);
141 v &= ~mask;
142 v |= val;
143 priv->write(priv, reg, v);
144
145 return v;
146 }
147
148 static inline int
149 ar8216_id_chip(struct ar8216_priv *priv)
150 {
151 u32 val;
152 u16 id;
153 int i;
154
155 priv->chip = UNKNOWN;
156
157 val = ar8216_mii_read(priv, AR8216_REG_CTRL);
158 if (val == ~0)
159 return -ENODEV;
160
161 id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
162 for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
163 u16 t;
164
165 val = ar8216_mii_read(priv, AR8216_REG_CTRL);
166 if (val == ~0)
167 return -ENODEV;
168
169 t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
170 if (t != id)
171 return -ENODEV;
172 }
173
174 switch (id) {
175 case 0x0101:
176 priv->chip = AR8216;
177 break;
178 case 0x0301:
179 priv->chip = AR8236;
180 break;
181 case 0x1000:
182 case 0x1001:
183 priv->chip = AR8316;
184 break;
185 default:
186 printk(KERN_DEBUG
187 "ar8216: Unknown Atheros device [ver=%d, rev=%d, phy_id=%04x%04x]\n",
188 (int)(id >> AR8216_CTRL_VERSION_S),
189 (int)(id & AR8216_CTRL_REVISION),
190 mdiobus_read(priv->phy->bus, priv->phy->addr, 2),
191 mdiobus_read(priv->phy->bus, priv->phy->addr, 3));
192
193 return -ENODEV;
194 }
195
196 return 0;
197 }
198
199 static void
200 ar8216_read_port_link(struct ar8216_priv *priv, int port,
201 struct switch_port_link *link)
202 {
203 u32 status;
204 u32 speed;
205
206 memset(link, '\0', sizeof(*link));
207
208 status = priv->read(priv, AR8216_REG_PORT_STATUS(port));
209
210 link->aneg = !!(status & AR8216_PORT_STATUS_LINK_AUTO);
211 if (link->aneg) {
212 link->link = !!(status & AR8216_PORT_STATUS_LINK_UP);
213 if (!link->link)
214 return;
215 } else {
216 link->link = true;
217 }
218
219 link->duplex = !!(status & AR8216_PORT_STATUS_DUPLEX);
220 link->tx_flow = !!(status & AR8216_PORT_STATUS_TXFLOW);
221 link->rx_flow = !!(status & AR8216_PORT_STATUS_RXFLOW);
222
223 speed = (status & AR8216_PORT_STATUS_SPEED) >>
224 AR8216_PORT_STATUS_SPEED_S;
225
226 switch (speed) {
227 case AR8216_PORT_SPEED_10M:
228 link->speed = SWITCH_PORT_SPEED_10;
229 break;
230 case AR8216_PORT_SPEED_100M:
231 link->speed = SWITCH_PORT_SPEED_100;
232 break;
233 case AR8216_PORT_SPEED_1000M:
234 link->speed = SWITCH_PORT_SPEED_1000;
235 break;
236 default:
237 link->speed = SWITCH_PORT_SPEED_UNKNOWN;
238 break;
239 }
240 }
241
242 static int
243 ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
244 struct switch_val *val)
245 {
246 struct ar8216_priv *priv = to_ar8216(dev);
247 priv->vlan = !!val->value.i;
248 return 0;
249 }
250
251 static int
252 ar8216_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
253 struct switch_val *val)
254 {
255 struct ar8216_priv *priv = to_ar8216(dev);
256 val->value.i = priv->vlan;
257 return 0;
258 }
259
260
261 static int
262 ar8216_set_pvid(struct switch_dev *dev, int port, int vlan)
263 {
264 struct ar8216_priv *priv = to_ar8216(dev);
265
266 /* make sure no invalid PVIDs get set */
267
268 if (vlan >= dev->vlans)
269 return -EINVAL;
270
271 priv->pvid[port] = vlan;
272 return 0;
273 }
274
275 static int
276 ar8216_get_pvid(struct switch_dev *dev, int port, int *vlan)
277 {
278 struct ar8216_priv *priv = to_ar8216(dev);
279 *vlan = priv->pvid[port];
280 return 0;
281 }
282
283 static int
284 ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
285 struct switch_val *val)
286 {
287 struct ar8216_priv *priv = to_ar8216(dev);
288 priv->vlan_id[val->port_vlan] = val->value.i;
289 return 0;
290 }
291
292 static int
293 ar8216_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
294 struct switch_val *val)
295 {
296 struct ar8216_priv *priv = to_ar8216(dev);
297 val->value.i = priv->vlan_id[val->port_vlan];
298 return 0;
299 }
300
301 static int
302 ar8216_get_port_link(struct switch_dev *dev, int port,
303 struct switch_port_link *link)
304 {
305 struct ar8216_priv *priv = to_ar8216(dev);
306
307 ar8216_read_port_link(priv, port, link);
308 return 0;
309 }
310
311 static int
312 ar8216_mangle_tx(struct sk_buff *skb, struct net_device *dev)
313 {
314 struct ar8216_priv *priv = dev->phy_ptr;
315 unsigned char *buf;
316
317 if (unlikely(!priv))
318 goto error;
319
320 if (!priv->vlan)
321 goto send;
322
323 if (unlikely(skb_headroom(skb) < 2)) {
324 if (pskb_expand_head(skb, 2, 0, GFP_ATOMIC) < 0)
325 goto error;
326 }
327
328 buf = skb_push(skb, 2);
329 buf[0] = 0x10;
330 buf[1] = 0x80;
331
332 send:
333 return priv->ndo_old->ndo_start_xmit(skb, dev);
334
335 error:
336 dev_kfree_skb_any(skb);
337 return 0;
338 }
339
340 static int
341 ar8216_mangle_rx(struct sk_buff *skb, int napi)
342 {
343 struct ar8216_priv *priv;
344 struct net_device *dev;
345 unsigned char *buf;
346 int port, vlan;
347
348 dev = skb->dev;
349 if (!dev)
350 goto error;
351
352 priv = dev->phy_ptr;
353 if (!priv)
354 goto error;
355
356 /* don't strip the header if vlan mode is disabled */
357 if (!priv->vlan)
358 goto recv;
359
360 /* strip header, get vlan id */
361 buf = skb->data;
362 skb_pull(skb, 2);
363
364 /* check for vlan header presence */
365 if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
366 goto recv;
367
368 port = buf[0] & 0xf;
369
370 /* no need to fix up packets coming from a tagged source */
371 if (priv->vlan_tagged & (1 << port))
372 goto recv;
373
374 /* lookup port vid from local table, the switch passes an invalid vlan id */
375 vlan = priv->vlan_id[priv->pvid[port]];
376
377 buf[14 + 2] &= 0xf0;
378 buf[14 + 2] |= vlan >> 8;
379 buf[15 + 2] = vlan & 0xff;
380
381 recv:
382 skb->protocol = eth_type_trans(skb, skb->dev);
383
384 if (napi)
385 return netif_receive_skb(skb);
386 else
387 return netif_rx(skb);
388
389 error:
390 /* no vlan? eat the packet! */
391 dev_kfree_skb_any(skb);
392 return NET_RX_DROP;
393 }
394
395 static int
396 ar8216_netif_rx(struct sk_buff *skb)
397 {
398 return ar8216_mangle_rx(skb, 0);
399 }
400
401 static int
402 ar8216_netif_receive_skb(struct sk_buff *skb)
403 {
404 return ar8216_mangle_rx(skb, 1);
405 }
406
407
408 static struct switch_attr ar8216_globals[] = {
409 {
410 .type = SWITCH_TYPE_INT,
411 .name = "enable_vlan",
412 .description = "Enable VLAN mode",
413 .set = ar8216_set_vlan,
414 .get = ar8216_get_vlan,
415 .max = 1
416 },
417 };
418
419 static struct switch_attr ar8216_port[] = {
420 };
421
422 static struct switch_attr ar8216_vlan[] = {
423 {
424 .type = SWITCH_TYPE_INT,
425 .name = "vid",
426 .description = "VLAN ID (0-4094)",
427 .set = ar8216_set_vid,
428 .get = ar8216_get_vid,
429 .max = 4094,
430 },
431 };
432
433
434 static int
435 ar8216_get_ports(struct switch_dev *dev, struct switch_val *val)
436 {
437 struct ar8216_priv *priv = to_ar8216(dev);
438 u8 ports = priv->vlan_table[val->port_vlan];
439 int i;
440
441 val->len = 0;
442 for (i = 0; i < AR8216_NUM_PORTS; i++) {
443 struct switch_port *p;
444
445 if (!(ports & (1 << i)))
446 continue;
447
448 p = &val->value.ports[val->len++];
449 p->id = i;
450 if (priv->vlan_tagged & (1 << i))
451 p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
452 else
453 p->flags = 0;
454 }
455 return 0;
456 }
457
458 static int
459 ar8216_set_ports(struct switch_dev *dev, struct switch_val *val)
460 {
461 struct ar8216_priv *priv = to_ar8216(dev);
462 u8 *vt = &priv->vlan_table[val->port_vlan];
463 int i, j;
464
465 *vt = 0;
466 for (i = 0; i < val->len; i++) {
467 struct switch_port *p = &val->value.ports[i];
468
469 if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED)) {
470 priv->vlan_tagged |= (1 << p->id);
471 } else {
472 priv->vlan_tagged &= ~(1 << p->id);
473 priv->pvid[p->id] = val->port_vlan;
474
475 /* make sure that an untagged port does not
476 * appear in other vlans */
477 for (j = 0; j < AR8X16_MAX_VLANS; j++) {
478 if (j == val->port_vlan)
479 continue;
480 priv->vlan_table[j] &= ~(1 << p->id);
481 }
482 }
483
484 *vt |= 1 << p->id;
485 }
486 return 0;
487 }
488
489 static int
490 ar8216_wait_bit(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
491 {
492 int timeout = 20;
493 u32 t = 0;
494
495 while (1) {
496 t = priv->read(priv, reg);
497 if ((t & mask) == val)
498 return 0;
499
500 if (timeout-- <= 0)
501 break;
502
503 udelay(10);
504 }
505
506 pr_err("ar8216: timeout on reg %08x: %08x & %08x != %08x\n",
507 (unsigned int) reg, t, mask, val);
508 return -ETIMEDOUT;
509 }
510
511 static void
512 ar8216_vtu_op(struct ar8216_priv *priv, u32 op, u32 val)
513 {
514 if (ar8216_wait_bit(priv, AR8216_REG_VTU, AR8216_VTU_ACTIVE, 0))
515 return;
516 if ((op & AR8216_VTU_OP) == AR8216_VTU_OP_LOAD) {
517 val &= AR8216_VTUDATA_MEMBER;
518 val |= AR8216_VTUDATA_VALID;
519 priv->write(priv, AR8216_REG_VTU_DATA, val);
520 }
521 op |= AR8216_VTU_ACTIVE;
522 priv->write(priv, AR8216_REG_VTU, op);
523 }
524
525 static void
526 ar8216_setup_port(struct ar8216_priv *priv, int port, u32 egress, u32 ingress,
527 u32 members, u32 pvid)
528 {
529 u32 header;
530
531 if (priv->vlan && port == AR8216_PORT_CPU && priv->chip == AR8216)
532 header = AR8216_PORT_CTRL_HEADER;
533 else
534 header = 0;
535
536 ar8216_rmw(priv, AR8216_REG_PORT_CTRL(port),
537 AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
538 AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
539 AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
540 AR8216_PORT_CTRL_LEARN | header |
541 (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
542 (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
543
544 ar8216_rmw(priv, AR8216_REG_PORT_VLAN(port),
545 AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
546 AR8216_PORT_VLAN_DEFAULT_ID,
547 (members << AR8216_PORT_VLAN_DEST_PORTS_S) |
548 (ingress << AR8216_PORT_VLAN_MODE_S) |
549 (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
550 }
551
552 static void
553 ar8236_setup_port(struct ar8216_priv *priv, int port, u32 egress, u32 ingress,
554 u32 members, u32 pvid)
555 {
556 ar8216_rmw(priv, AR8216_REG_PORT_CTRL(port),
557 AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
558 AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
559 AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
560 AR8216_PORT_CTRL_LEARN |
561 (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
562 (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
563
564 ar8216_rmw(priv, AR8236_REG_PORT_VLAN(port),
565 AR8236_PORT_VLAN_DEFAULT_ID,
566 (pvid << AR8236_PORT_VLAN_DEFAULT_ID_S));
567
568 ar8216_rmw(priv, AR8236_REG_PORT_VLAN2(port),
569 AR8236_PORT_VLAN2_VLAN_MODE |
570 AR8236_PORT_VLAN2_MEMBER,
571 (ingress << AR8236_PORT_VLAN2_VLAN_MODE_S) |
572 (members << AR8236_PORT_VLAN2_MEMBER_S));
573 }
574
575 static int
576 ar8216_hw_apply(struct switch_dev *dev)
577 {
578 struct ar8216_priv *priv = to_ar8216(dev);
579 u8 portmask[AR8216_NUM_PORTS];
580 int i, j;
581
582 mutex_lock(&priv->reg_mutex);
583 /* flush all vlan translation unit entries */
584 ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
585
586 memset(portmask, 0, sizeof(portmask));
587 if (!priv->init) {
588 /* calculate the port destination masks and load vlans
589 * into the vlan translation unit */
590 for (j = 0; j < AR8X16_MAX_VLANS; j++) {
591 u8 vp = priv->vlan_table[j];
592
593 if (!vp)
594 continue;
595
596 for (i = 0; i < AR8216_NUM_PORTS; i++) {
597 u8 mask = (1 << i);
598 if (vp & mask)
599 portmask[i] |= vp & ~mask;
600 }
601
602 ar8216_vtu_op(priv,
603 AR8216_VTU_OP_LOAD |
604 (priv->vlan_id[j] << AR8216_VTU_VID_S),
605 priv->vlan_table[j]);
606 }
607 } else {
608 /* vlan disabled:
609 * isolate all ports, but connect them to the cpu port */
610 for (i = 0; i < AR8216_NUM_PORTS; i++) {
611 if (i == AR8216_PORT_CPU)
612 continue;
613
614 portmask[i] = 1 << AR8216_PORT_CPU;
615 portmask[AR8216_PORT_CPU] |= (1 << i);
616 }
617 }
618
619 /* update the port destination mask registers and tag settings */
620 for (i = 0; i < AR8216_NUM_PORTS; i++) {
621 int egress, ingress;
622 int pvid;
623
624 if (priv->vlan)
625 pvid = priv->vlan_id[priv->pvid[i]];
626 else
627 pvid = i;
628
629 if (priv->vlan) {
630 if (priv->vlan_tagged & (1 << i))
631 egress = AR8216_OUT_ADD_VLAN;
632 else
633 egress = AR8216_OUT_STRIP_VLAN;
634 } else {
635 egress = AR8216_OUT_KEEP;
636 }
637
638 if (priv->vlan)
639 ingress = AR8216_IN_SECURE;
640 else
641 ingress = AR8216_IN_PORT_ONLY;
642
643 if (priv->chip == AR8236)
644 ar8236_setup_port(priv, i, egress, ingress, portmask[i],
645 pvid);
646 else
647 ar8216_setup_port(priv, i, egress, ingress, portmask[i],
648 pvid);
649 }
650 mutex_unlock(&priv->reg_mutex);
651 return 0;
652 }
653
654 static int
655 ar8216_hw_init(struct ar8216_priv *priv)
656 {
657 /* XXX: undocumented magic from atheros, required! */
658 priv->write(priv, 0x38, 0xc000050e);
659
660 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
661 AR8216_GCTRL_MTU, 1518 + 8 + 2);
662 return 0;
663 }
664
665 static int
666 ar8236_hw_init(struct ar8216_priv *priv)
667 {
668 int i;
669 struct mii_bus *bus;
670
671 if (priv->initialized)
672 return 0;
673
674 /* Initialize the PHYs */
675 bus = priv->phy->bus;
676 for (i = 0; i < 5; i++) {
677 mdiobus_write(bus, i, MII_ADVERTISE,
678 ADVERTISE_ALL | ADVERTISE_PAUSE_CAP |
679 ADVERTISE_PAUSE_ASYM);
680 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
681 }
682 msleep(1000);
683
684 /* enable jumbo frames */
685 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
686 AR8316_GCTRL_MTU, 9018 + 8 + 2);
687
688 priv->initialized = true;
689 return 0;
690 }
691
692 static int
693 ar8316_hw_init(struct ar8216_priv *priv)
694 {
695 int i;
696 u32 val, newval;
697 struct mii_bus *bus;
698
699 val = priv->read(priv, 0x8);
700
701 if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
702 if (priv->port4_phy) {
703 /* value taken from Ubiquiti RouterStation Pro */
704 newval = 0x81461bea;
705 printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
706 } else {
707 newval = 0x01261be2;
708 printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
709 }
710 } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
711 /* value taken from AVM Fritz!Box 7390 sources */
712 newval = 0x010e5b71;
713 } else {
714 /* no known value for phy interface */
715 printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
716 priv->phy->interface);
717 return -EINVAL;
718 }
719
720 if (val == newval)
721 goto out;
722
723 priv->write(priv, 0x8, newval);
724
725 /* standard atheros magic */
726 priv->write(priv, 0x38, 0xc000050e);
727
728 /* Initialize the ports */
729 bus = priv->phy->bus;
730 for (i = 0; i < 5; i++) {
731 if ((i == 4) && priv->port4_phy &&
732 priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
733 /* work around for phy4 rgmii mode */
734 ar8216_phy_dbg_write(priv, i, 0x12, 0x480c);
735 /* rx delay */
736 ar8216_phy_dbg_write(priv, i, 0x0, 0x824e);
737 /* tx delay */
738 ar8216_phy_dbg_write(priv, i, 0x5, 0x3d47);
739 msleep(1000);
740 }
741
742 /* initialize the port itself */
743 mdiobus_write(bus, i, MII_ADVERTISE,
744 ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
745 mdiobus_write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
746 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
747 msleep(1000);
748 }
749
750 /* enable jumbo frames */
751 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
752 AR8316_GCTRL_MTU, 9018 + 8 + 2);
753
754 /* enable cpu port to receive multicast and broadcast frames */
755 priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
756
757 out:
758 priv->initialized = true;
759 return 0;
760 }
761
762 static void
763 ar8216_init_port(struct ar8216_priv *priv, int port)
764 {
765 /* Enable port learning and tx */
766 priv->write(priv, AR8216_REG_PORT_CTRL(port),
767 AR8216_PORT_CTRL_LEARN |
768 (4 << AR8216_PORT_CTRL_STATE_S));
769
770 priv->write(priv, AR8216_REG_PORT_VLAN(port), 0);
771
772 if (port == AR8216_PORT_CPU) {
773 priv->write(priv, AR8216_REG_PORT_STATUS(port),
774 AR8216_PORT_STATUS_LINK_UP |
775 ((priv->chip == AR8316) ?
776 AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
777 AR8216_PORT_STATUS_TXMAC |
778 AR8216_PORT_STATUS_RXMAC |
779 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
780 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
781 AR8216_PORT_STATUS_DUPLEX);
782 } else {
783 priv->write(priv, AR8216_REG_PORT_STATUS(port),
784 AR8216_PORT_STATUS_LINK_AUTO);
785 }
786 }
787
788 static int
789 ar8216_reset_switch(struct switch_dev *dev)
790 {
791 struct ar8216_priv *priv = to_ar8216(dev);
792 int i;
793
794 mutex_lock(&priv->reg_mutex);
795 memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
796 offsetof(struct ar8216_priv, vlan));
797
798 for (i = 0; i < AR8X16_MAX_VLANS; i++)
799 priv->vlan_id[i] = i;
800
801 /* Configure all ports */
802 for (i = 0; i < AR8216_NUM_PORTS; i++)
803 ar8216_init_port(priv, i);
804
805 mutex_unlock(&priv->reg_mutex);
806 return ar8216_hw_apply(dev);
807 }
808
809
810 static const struct switch_dev_ops ar8216_ops = {
811 .attr_global = {
812 .attr = ar8216_globals,
813 .n_attr = ARRAY_SIZE(ar8216_globals),
814 },
815 .attr_port = {
816 .attr = ar8216_port,
817 .n_attr = ARRAY_SIZE(ar8216_port),
818 },
819 .attr_vlan = {
820 .attr = ar8216_vlan,
821 .n_attr = ARRAY_SIZE(ar8216_vlan),
822 },
823 .get_port_pvid = ar8216_get_pvid,
824 .set_port_pvid = ar8216_set_pvid,
825 .get_vlan_ports = ar8216_get_ports,
826 .set_vlan_ports = ar8216_set_ports,
827 .apply_config = ar8216_hw_apply,
828 .reset_switch = ar8216_reset_switch,
829 .get_port_link = ar8216_get_port_link,
830 };
831
832 static int
833 ar8216_config_init(struct phy_device *pdev)
834 {
835 struct ar8216_priv *priv = pdev->priv;
836 struct net_device *dev = pdev->attached_dev;
837 struct switch_dev *swdev;
838 int ret;
839
840 if (!priv) {
841 priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
842 if (priv == NULL)
843 return -ENOMEM;
844 }
845
846 priv->phy = pdev;
847
848 ret = ar8216_id_chip(priv);
849 if (ret)
850 goto err_free_priv;
851
852 if (pdev->addr != 0) {
853 if (priv->chip == AR8316) {
854 pdev->supported |= SUPPORTED_1000baseT_Full;
855 pdev->advertising |= ADVERTISED_1000baseT_Full;
856
857 /* check if we're attaching to the switch twice */
858 pdev = pdev->bus->phy_map[0];
859 if (!pdev) {
860 kfree(priv);
861 return 0;
862 }
863
864 /* switch device has not been initialized, reuse priv */
865 if (!pdev->priv) {
866 priv->port4_phy = true;
867 pdev->priv = priv;
868 return 0;
869 }
870
871 kfree(priv);
872
873 /* switch device has been initialized, reinit */
874 priv = pdev->priv;
875 priv->dev.ports = (AR8216_NUM_PORTS - 1);
876 priv->initialized = false;
877 priv->port4_phy = true;
878 ar8316_hw_init(priv);
879 return 0;
880 }
881
882 kfree(priv);
883 return 0;
884 }
885
886 printk(KERN_INFO "%s: AR%d switch driver attached.\n",
887 pdev->attached_dev->name, priv->chip);
888
889 pdev->supported = priv->chip == AR8316 ?
890 SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
891 pdev->advertising = pdev->supported;
892
893 mutex_init(&priv->reg_mutex);
894 priv->read = ar8216_mii_read;
895 priv->write = ar8216_mii_write;
896
897 pdev->priv = priv;
898
899 swdev = &priv->dev;
900 swdev->cpu_port = AR8216_PORT_CPU;
901 swdev->ops = &ar8216_ops;
902 swdev->ports = AR8216_NUM_PORTS;
903
904 if (priv->chip == AR8316) {
905 swdev->name = "Atheros AR8316";
906 swdev->vlans = AR8X16_MAX_VLANS;
907
908 if (priv->port4_phy) {
909 /* port 5 connected to the other mac, therefore unusable */
910 swdev->ports = (AR8216_NUM_PORTS - 1);
911 }
912 } else if (priv->chip == AR8236) {
913 swdev->name = "Atheros AR8236";
914 swdev->vlans = AR8216_NUM_VLANS;
915 swdev->ports = AR8216_NUM_PORTS;
916 } else {
917 swdev->name = "Atheros AR8216";
918 swdev->vlans = AR8216_NUM_VLANS;
919 }
920
921 ret = register_switch(&priv->dev, pdev->attached_dev);
922 if (ret)
923 goto err_free_priv;
924
925 priv->init = true;
926
927 ret = 0;
928 if (priv->chip == AR8216)
929 ret = ar8216_hw_init(priv);
930 else if (priv->chip == AR8236)
931 ret = ar8236_hw_init(priv);
932 else if (priv->chip == AR8316)
933 ret = ar8316_hw_init(priv);
934
935 if (ret)
936 goto err_free_priv;
937
938 ret = ar8216_reset_switch(&priv->dev);
939 if (ret)
940 goto err_free_priv;
941
942 dev->phy_ptr = priv;
943
944 /* VID fixup only needed on ar8216 */
945 if (pdev->addr == 0 && priv->chip == AR8216) {
946 pdev->pkt_align = 2;
947 pdev->netif_receive_skb = ar8216_netif_receive_skb;
948 pdev->netif_rx = ar8216_netif_rx;
949 priv->ndo_old = dev->netdev_ops;
950 memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
951 priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
952 dev->netdev_ops = &priv->ndo;
953 }
954
955 priv->init = false;
956
957 return 0;
958
959 err_free_priv:
960 kfree(priv);
961 return ret;
962 }
963
964 static int
965 ar8216_read_status(struct phy_device *phydev)
966 {
967 struct ar8216_priv *priv = phydev->priv;
968 struct switch_port_link link;
969 int ret;
970
971 if (phydev->addr != 0)
972 return genphy_read_status(phydev);
973
974 ar8216_read_port_link(priv, phydev->addr, &link);
975 phydev->link = !!link.link;
976 if (!phydev->link)
977 return 0;
978
979 switch (link.speed) {
980 case SWITCH_PORT_SPEED_10:
981 phydev->speed = SPEED_10;
982 break;
983 case SWITCH_PORT_SPEED_100:
984 phydev->speed = SPEED_100;
985 break;
986 case SWITCH_PORT_SPEED_1000:
987 phydev->speed = SPEED_1000;
988 break;
989 default:
990 phydev->speed = 0;
991 }
992 phydev->duplex = link.duplex ? DUPLEX_FULL : DUPLEX_HALF;
993
994 /* flush the address translation unit */
995 mutex_lock(&priv->reg_mutex);
996 ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
997 if (!ret)
998 priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
999 mutex_unlock(&priv->reg_mutex);
1000
1001 phydev->state = PHY_RUNNING;
1002 netif_carrier_on(phydev->attached_dev);
1003 phydev->adjust_link(phydev->attached_dev);
1004
1005 return ret;
1006 }
1007
1008 static int
1009 ar8216_config_aneg(struct phy_device *phydev)
1010 {
1011 if (phydev->addr == 0)
1012 return 0;
1013
1014 return genphy_config_aneg(phydev);
1015 }
1016
1017 static int
1018 ar8216_probe(struct phy_device *pdev)
1019 {
1020 struct ar8216_priv priv;
1021
1022 priv.phy = pdev;
1023 return ar8216_id_chip(&priv);
1024 }
1025
1026 static void
1027 ar8216_remove(struct phy_device *pdev)
1028 {
1029 struct ar8216_priv *priv = pdev->priv;
1030 struct net_device *dev = pdev->attached_dev;
1031
1032 if (!priv)
1033 return;
1034
1035 if (priv->ndo_old && dev)
1036 dev->netdev_ops = priv->ndo_old;
1037 if (pdev->addr == 0)
1038 unregister_switch(&priv->dev);
1039 kfree(priv);
1040 }
1041
1042 static struct phy_driver ar8216_driver = {
1043 .phy_id = 0x004d0000,
1044 .name = "Atheros AR8216/AR8236/AR8316",
1045 .phy_id_mask = 0xffff0000,
1046 .features = PHY_BASIC_FEATURES,
1047 .probe = ar8216_probe,
1048 .remove = ar8216_remove,
1049 .config_init = &ar8216_config_init,
1050 .config_aneg = &ar8216_config_aneg,
1051 .read_status = &ar8216_read_status,
1052 .driver = { .owner = THIS_MODULE },
1053 };
1054
1055 int __init
1056 ar8216_init(void)
1057 {
1058 return phy_driver_register(&ar8216_driver);
1059 }
1060
1061 void __exit
1062 ar8216_exit(void)
1063 {
1064 phy_driver_unregister(&ar8216_driver);
1065 }
1066
1067 module_init(ar8216_init);
1068 module_exit(ar8216_exit);
1069 MODULE_LICENSE("GPL");
1070
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