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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 usleep_range(1000, 2000); /* 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 usleep_range(1000, 2000); /* 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 if (priv->vlan_tagged & (1 << i))
627 egress = AR8216_OUT_ADD_VLAN;
628 else
629 egress = AR8216_OUT_STRIP_VLAN;
630 ingress = AR8216_IN_SECURE;
631 } else {
632 pvid = i;
633 egress = AR8216_OUT_KEEP;
634 ingress = AR8216_IN_PORT_ONLY;
635 }
636
637 if (priv->chip == AR8236)
638 ar8236_setup_port(priv, i, egress, ingress, portmask[i],
639 pvid);
640 else
641 ar8216_setup_port(priv, i, egress, ingress, portmask[i],
642 pvid);
643 }
644 mutex_unlock(&priv->reg_mutex);
645 return 0;
646 }
647
648 static int
649 ar8216_hw_init(struct ar8216_priv *priv)
650 {
651 /* XXX: undocumented magic from atheros, required! */
652 priv->write(priv, 0x38, 0xc000050e);
653
654 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
655 AR8216_GCTRL_MTU, 1518 + 8 + 2);
656 return 0;
657 }
658
659 static int
660 ar8236_hw_init(struct ar8216_priv *priv)
661 {
662 int i;
663 struct mii_bus *bus;
664
665 if (priv->initialized)
666 return 0;
667
668 /* Initialize the PHYs */
669 bus = priv->phy->bus;
670 for (i = 0; i < 5; i++) {
671 mdiobus_write(bus, i, MII_ADVERTISE,
672 ADVERTISE_ALL | ADVERTISE_PAUSE_CAP |
673 ADVERTISE_PAUSE_ASYM);
674 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
675 }
676 msleep(1000);
677
678 /* enable jumbo frames */
679 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
680 AR8316_GCTRL_MTU, 9018 + 8 + 2);
681
682 priv->initialized = true;
683 return 0;
684 }
685
686 static int
687 ar8316_hw_init(struct ar8216_priv *priv)
688 {
689 int i;
690 u32 val, newval;
691 struct mii_bus *bus;
692
693 val = priv->read(priv, 0x8);
694
695 if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
696 if (priv->port4_phy) {
697 /* value taken from Ubiquiti RouterStation Pro */
698 newval = 0x81461bea;
699 printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
700 } else {
701 newval = 0x01261be2;
702 printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
703 }
704 } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
705 /* value taken from AVM Fritz!Box 7390 sources */
706 newval = 0x010e5b71;
707 } else {
708 /* no known value for phy interface */
709 printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
710 priv->phy->interface);
711 return -EINVAL;
712 }
713
714 if (val == newval)
715 goto out;
716
717 priv->write(priv, 0x8, newval);
718
719 /* standard atheros magic */
720 priv->write(priv, 0x38, 0xc000050e);
721
722 /* Initialize the ports */
723 bus = priv->phy->bus;
724 for (i = 0; i < 5; i++) {
725 if ((i == 4) && priv->port4_phy &&
726 priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
727 /* work around for phy4 rgmii mode */
728 ar8216_phy_dbg_write(priv, i, 0x12, 0x480c);
729 /* rx delay */
730 ar8216_phy_dbg_write(priv, i, 0x0, 0x824e);
731 /* tx delay */
732 ar8216_phy_dbg_write(priv, i, 0x5, 0x3d47);
733 msleep(1000);
734 }
735
736 /* initialize the port itself */
737 mdiobus_write(bus, i, MII_ADVERTISE,
738 ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
739 mdiobus_write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
740 mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
741 msleep(1000);
742 }
743
744 /* enable jumbo frames */
745 ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
746 AR8316_GCTRL_MTU, 9018 + 8 + 2);
747
748 /* enable cpu port to receive multicast and broadcast frames */
749 priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
750
751 out:
752 priv->initialized = true;
753 return 0;
754 }
755
756 static void
757 ar8216_init_port(struct ar8216_priv *priv, int port)
758 {
759 /* Enable port learning and tx */
760 priv->write(priv, AR8216_REG_PORT_CTRL(port),
761 AR8216_PORT_CTRL_LEARN |
762 (4 << AR8216_PORT_CTRL_STATE_S));
763
764 priv->write(priv, AR8216_REG_PORT_VLAN(port), 0);
765
766 if (port == AR8216_PORT_CPU) {
767 priv->write(priv, AR8216_REG_PORT_STATUS(port),
768 AR8216_PORT_STATUS_LINK_UP |
769 ((priv->chip == AR8316) ?
770 AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
771 AR8216_PORT_STATUS_TXMAC |
772 AR8216_PORT_STATUS_RXMAC |
773 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
774 ((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
775 AR8216_PORT_STATUS_DUPLEX);
776 } else {
777 priv->write(priv, AR8216_REG_PORT_STATUS(port),
778 AR8216_PORT_STATUS_LINK_AUTO);
779 }
780 }
781
782 static int
783 ar8216_reset_switch(struct switch_dev *dev)
784 {
785 struct ar8216_priv *priv = to_ar8216(dev);
786 int i;
787
788 mutex_lock(&priv->reg_mutex);
789 memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
790 offsetof(struct ar8216_priv, vlan));
791
792 for (i = 0; i < AR8X16_MAX_VLANS; i++)
793 priv->vlan_id[i] = i;
794
795 /* Configure all ports */
796 for (i = 0; i < AR8216_NUM_PORTS; i++)
797 ar8216_init_port(priv, i);
798
799 mutex_unlock(&priv->reg_mutex);
800 return ar8216_hw_apply(dev);
801 }
802
803
804 static const struct switch_dev_ops ar8216_ops = {
805 .attr_global = {
806 .attr = ar8216_globals,
807 .n_attr = ARRAY_SIZE(ar8216_globals),
808 },
809 .attr_port = {
810 .attr = ar8216_port,
811 .n_attr = ARRAY_SIZE(ar8216_port),
812 },
813 .attr_vlan = {
814 .attr = ar8216_vlan,
815 .n_attr = ARRAY_SIZE(ar8216_vlan),
816 },
817 .get_port_pvid = ar8216_get_pvid,
818 .set_port_pvid = ar8216_set_pvid,
819 .get_vlan_ports = ar8216_get_ports,
820 .set_vlan_ports = ar8216_set_ports,
821 .apply_config = ar8216_hw_apply,
822 .reset_switch = ar8216_reset_switch,
823 .get_port_link = ar8216_get_port_link,
824 };
825
826 static int
827 ar8216_config_init(struct phy_device *pdev)
828 {
829 struct ar8216_priv *priv = pdev->priv;
830 struct net_device *dev = pdev->attached_dev;
831 struct switch_dev *swdev;
832 int ret;
833
834 if (!priv) {
835 priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
836 if (priv == NULL)
837 return -ENOMEM;
838 }
839
840 priv->phy = pdev;
841
842 ret = ar8216_id_chip(priv);
843 if (ret)
844 goto err_free_priv;
845
846 if (pdev->addr != 0) {
847 if (priv->chip == AR8316) {
848 pdev->supported |= SUPPORTED_1000baseT_Full;
849 pdev->advertising |= ADVERTISED_1000baseT_Full;
850
851 /* check if we're attaching to the switch twice */
852 pdev = pdev->bus->phy_map[0];
853 if (!pdev) {
854 kfree(priv);
855 return 0;
856 }
857
858 /* switch device has not been initialized, reuse priv */
859 if (!pdev->priv) {
860 priv->port4_phy = true;
861 pdev->priv = priv;
862 return 0;
863 }
864
865 kfree(priv);
866
867 /* switch device has been initialized, reinit */
868 priv = pdev->priv;
869 priv->dev.ports = (AR8216_NUM_PORTS - 1);
870 priv->initialized = false;
871 priv->port4_phy = true;
872 ar8316_hw_init(priv);
873 return 0;
874 }
875
876 kfree(priv);
877 return 0;
878 }
879
880 printk(KERN_INFO "%s: AR%d switch driver attached.\n",
881 pdev->attached_dev->name, priv->chip);
882
883 pdev->supported = priv->chip == AR8316 ?
884 SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
885 pdev->advertising = pdev->supported;
886
887 mutex_init(&priv->reg_mutex);
888 priv->read = ar8216_mii_read;
889 priv->write = ar8216_mii_write;
890
891 pdev->priv = priv;
892
893 swdev = &priv->dev;
894 swdev->cpu_port = AR8216_PORT_CPU;
895 swdev->ops = &ar8216_ops;
896 swdev->ports = AR8216_NUM_PORTS;
897
898 if (priv->chip == AR8316) {
899 swdev->name = "Atheros AR8316";
900 swdev->vlans = AR8X16_MAX_VLANS;
901
902 if (priv->port4_phy) {
903 /* port 5 connected to the other mac, therefore unusable */
904 swdev->ports = (AR8216_NUM_PORTS - 1);
905 }
906 } else if (priv->chip == AR8236) {
907 swdev->name = "Atheros AR8236";
908 swdev->vlans = AR8216_NUM_VLANS;
909 swdev->ports = AR8216_NUM_PORTS;
910 } else {
911 swdev->name = "Atheros AR8216";
912 swdev->vlans = AR8216_NUM_VLANS;
913 }
914
915 ret = register_switch(&priv->dev, pdev->attached_dev);
916 if (ret)
917 goto err_free_priv;
918
919 priv->init = true;
920
921 ret = 0;
922 if (priv->chip == AR8216)
923 ret = ar8216_hw_init(priv);
924 else if (priv->chip == AR8236)
925 ret = ar8236_hw_init(priv);
926 else if (priv->chip == AR8316)
927 ret = ar8316_hw_init(priv);
928
929 if (ret)
930 goto err_free_priv;
931
932 ret = ar8216_reset_switch(&priv->dev);
933 if (ret)
934 goto err_free_priv;
935
936 dev->phy_ptr = priv;
937
938 /* VID fixup only needed on ar8216 */
939 if (pdev->addr == 0 && priv->chip == AR8216) {
940 pdev->pkt_align = 2;
941 pdev->netif_receive_skb = ar8216_netif_receive_skb;
942 pdev->netif_rx = ar8216_netif_rx;
943 priv->ndo_old = dev->netdev_ops;
944 memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
945 priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
946 dev->netdev_ops = &priv->ndo;
947 }
948
949 priv->init = false;
950
951 return 0;
952
953 err_free_priv:
954 kfree(priv);
955 return ret;
956 }
957
958 static int
959 ar8216_read_status(struct phy_device *phydev)
960 {
961 struct ar8216_priv *priv = phydev->priv;
962 struct switch_port_link link;
963 int ret;
964
965 if (phydev->addr != 0)
966 return genphy_read_status(phydev);
967
968 ar8216_read_port_link(priv, phydev->addr, &link);
969 phydev->link = !!link.link;
970 if (!phydev->link)
971 return 0;
972
973 switch (link.speed) {
974 case SWITCH_PORT_SPEED_10:
975 phydev->speed = SPEED_10;
976 break;
977 case SWITCH_PORT_SPEED_100:
978 phydev->speed = SPEED_100;
979 break;
980 case SWITCH_PORT_SPEED_1000:
981 phydev->speed = SPEED_1000;
982 break;
983 default:
984 phydev->speed = 0;
985 }
986 phydev->duplex = link.duplex ? DUPLEX_FULL : DUPLEX_HALF;
987
988 /* flush the address translation unit */
989 mutex_lock(&priv->reg_mutex);
990 ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
991 if (!ret)
992 priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
993 mutex_unlock(&priv->reg_mutex);
994
995 phydev->state = PHY_RUNNING;
996 netif_carrier_on(phydev->attached_dev);
997 phydev->adjust_link(phydev->attached_dev);
998
999 return ret;
1000 }
1001
1002 static int
1003 ar8216_config_aneg(struct phy_device *phydev)
1004 {
1005 if (phydev->addr == 0)
1006 return 0;
1007
1008 return genphy_config_aneg(phydev);
1009 }
1010
1011 static int
1012 ar8216_probe(struct phy_device *pdev)
1013 {
1014 struct ar8216_priv priv;
1015
1016 priv.phy = pdev;
1017 return ar8216_id_chip(&priv);
1018 }
1019
1020 static void
1021 ar8216_remove(struct phy_device *pdev)
1022 {
1023 struct ar8216_priv *priv = pdev->priv;
1024 struct net_device *dev = pdev->attached_dev;
1025
1026 if (!priv)
1027 return;
1028
1029 if (priv->ndo_old && dev)
1030 dev->netdev_ops = priv->ndo_old;
1031 if (pdev->addr == 0)
1032 unregister_switch(&priv->dev);
1033 kfree(priv);
1034 }
1035
1036 static struct phy_driver ar8216_driver = {
1037 .phy_id = 0x004d0000,
1038 .name = "Atheros AR8216/AR8236/AR8316",
1039 .phy_id_mask = 0xffff0000,
1040 .features = PHY_BASIC_FEATURES,
1041 .probe = ar8216_probe,
1042 .remove = ar8216_remove,
1043 .config_init = &ar8216_config_init,
1044 .config_aneg = &ar8216_config_aneg,
1045 .read_status = &ar8216_read_status,
1046 .driver = { .owner = THIS_MODULE },
1047 };
1048
1049 int __init
1050 ar8216_init(void)
1051 {
1052 return phy_driver_register(&ar8216_driver);
1053 }
1054
1055 void __exit
1056 ar8216_exit(void)
1057 {
1058 phy_driver_unregister(&ar8216_driver);
1059 }
1060
1061 module_init(ar8216_init);
1062 module_exit(ar8216_exit);
1063 MODULE_LICENSE("GPL");
1064
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