Root/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 "ar8216.h"
33
34/* size of the vlan table */
35#define AR8X16_MAX_VLANS 128
36#define AR8X16_PROBE_RETRIES 10
37
38struct ar8216_priv {
39    struct switch_dev dev;
40    struct phy_device *phy;
41    u32 (*read)(struct ar8216_priv *priv, int reg);
42    void (*write)(struct ar8216_priv *priv, int reg, u32 val);
43    const struct net_device_ops *ndo_old;
44    struct net_device_ops ndo;
45    struct mutex reg_mutex;
46    int chip;
47    bool initialized;
48    bool port4_phy;
49    char buf[80];
50
51    /* all fields below are cleared on reset */
52    bool vlan;
53    u16 vlan_id[AR8X16_MAX_VLANS];
54    u8 vlan_table[AR8X16_MAX_VLANS];
55    u8 vlan_tagged;
56    u16 pvid[AR8216_NUM_PORTS];
57};
58
59#define to_ar8216(_dev) container_of(_dev, struct ar8216_priv, dev)
60
61static inline void
62split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
63{
64    regaddr >>= 1;
65    *r1 = regaddr & 0x1e;
66
67    regaddr >>= 5;
68    *r2 = regaddr & 0x7;
69
70    regaddr >>= 3;
71    *page = regaddr & 0x1ff;
72}
73
74static u32
75ar8216_mii_read(struct ar8216_priv *priv, int reg)
76{
77    struct phy_device *phy = priv->phy;
78    u16 r1, r2, page;
79    u16 lo, hi;
80
81    split_addr((u32) reg, &r1, &r2, &page);
82    mdiobus_write(phy->bus, 0x18, 0, page);
83    msleep(1); /* wait for the page switch to propagate */
84    lo = mdiobus_read(phy->bus, 0x10 | r2, r1);
85    hi = mdiobus_read(phy->bus, 0x10 | r2, r1 + 1);
86
87    return (hi << 16) | lo;
88}
89
90static void
91ar8216_mii_write(struct ar8216_priv *priv, int reg, u32 val)
92{
93    struct phy_device *phy = priv->phy;
94    u16 r1, r2, r3;
95    u16 lo, hi;
96
97    split_addr((u32) reg, &r1, &r2, &r3);
98    mdiobus_write(phy->bus, 0x18, 0, r3);
99    msleep(1); /* wait for the page switch to propagate */
100
101    lo = val & 0xffff;
102    hi = (u16) (val >> 16);
103    mdiobus_write(phy->bus, 0x10 | r2, r1 + 1, hi);
104    mdiobus_write(phy->bus, 0x10 | r2, r1, lo);
105}
106
107static u32
108ar8216_rmw(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
109{
110    u32 v;
111
112    v = priv->read(priv, reg);
113    v &= ~mask;
114    v |= val;
115    priv->write(priv, reg, v);
116
117    return v;
118}
119
120static inline int
121ar8216_id_chip(struct ar8216_priv *priv)
122{
123    u32 val;
124    u16 id;
125    int i;
126
127    val = ar8216_mii_read(priv, AR8216_REG_CTRL);
128    if (val == ~0)
129        return UNKNOWN;
130
131    id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
132    for (i = 0; i < AR8X16_PROBE_RETRIES; i++) {
133        u16 t;
134
135        val = ar8216_mii_read(priv, AR8216_REG_CTRL);
136        if (val == ~0)
137            return UNKNOWN;
138
139        t = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
140        if (t != id)
141            return UNKNOWN;
142    }
143
144    switch (id) {
145    case 0x0101:
146        return AR8216;
147    case 0x1000:
148    case 0x1001:
149        return AR8316;
150    default:
151        printk(KERN_DEBUG
152            "ar8216: Unknown Atheros device [ver=%d, rev=%d, phy_id=%04x%04x]\n",
153            (int)(id >> AR8216_CTRL_VERSION_S),
154            (int)(id & AR8216_CTRL_REVISION),
155            mdiobus_read(priv->phy->bus, priv->phy->addr, 2),
156            mdiobus_read(priv->phy->bus, priv->phy->addr, 3));
157
158        return UNKNOWN;
159    }
160}
161
162static int
163ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
164                struct switch_val *val)
165{
166    struct ar8216_priv *priv = to_ar8216(dev);
167    priv->vlan = !!val->value.i;
168    return 0;
169}
170
171static int
172ar8216_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
173                struct switch_val *val)
174{
175    struct ar8216_priv *priv = to_ar8216(dev);
176    val->value.i = priv->vlan;
177    return 0;
178}
179
180
181static int
182ar8216_set_pvid(struct switch_dev *dev, int port, int vlan)
183{
184    struct ar8216_priv *priv = to_ar8216(dev);
185
186    /* make sure no invalid PVIDs get set */
187
188    if (vlan >= dev->vlans)
189        return -EINVAL;
190
191    priv->pvid[port] = vlan;
192    return 0;
193}
194
195static int
196ar8216_get_pvid(struct switch_dev *dev, int port, int *vlan)
197{
198    struct ar8216_priv *priv = to_ar8216(dev);
199    *vlan = priv->pvid[port];
200    return 0;
201}
202
203static int
204ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
205                struct switch_val *val)
206{
207    struct ar8216_priv *priv = to_ar8216(dev);
208    priv->vlan_id[val->port_vlan] = val->value.i;
209    return 0;
210}
211
212static int
213ar8216_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
214                struct switch_val *val)
215{
216    struct ar8216_priv *priv = to_ar8216(dev);
217    val->value.i = priv->vlan_id[val->port_vlan];
218    return 0;
219}
220
221static const char *ar8216_speed_str(unsigned speed)
222{
223    switch (speed) {
224    case AR8216_PORT_SPEED_10M:
225        return "10baseT";
226    case AR8216_PORT_SPEED_100M:
227        return "100baseT";
228    case AR8216_PORT_SPEED_1000M:
229        return "1000baseT";
230    }
231
232    return "unknown";
233}
234
235static int ar8216_port_get_link(struct switch_dev *dev,
236                const struct switch_attr *attr,
237                struct switch_val *val)
238{
239    struct ar8216_priv *priv = to_ar8216(dev);
240    u32 len;
241    u32 status;
242    int port;
243
244    port = val->port_vlan;
245
246    memset(priv->buf, '\0', sizeof(priv->buf));
247    status = priv->read(priv, AR8216_REG_PORT_STATUS(port));
248
249    if (status & AR8216_PORT_STATUS_LINK_UP) {
250        len = snprintf(priv->buf, sizeof(priv->buf),
251                "port:%d link:up speed:%s %s-duplex %s%s%s",
252                port,
253                ar8216_speed_str((status &
254                          AR8216_PORT_STATUS_SPEED) >>
255                         AR8216_PORT_STATUS_SPEED_S),
256                (status & AR8216_PORT_STATUS_DUPLEX) ?
257                    "full" : "half",
258                (status & AR8216_PORT_STATUS_TXFLOW) ?
259                    "txflow ": "",
260                (status & AR8216_PORT_STATUS_RXFLOW) ?
261                    "rxflow " : "",
262                (status & AR8216_PORT_STATUS_LINK_AUTO) ?
263                    "auto ": "");
264    } else {
265        len = snprintf(priv->buf, sizeof(priv->buf), "port:%d link:down",
266                port);
267    }
268
269    val->value.s = priv->buf;
270    val->len = len;
271
272    return 0;
273}
274
275static int
276ar8216_mangle_tx(struct sk_buff *skb, struct net_device *dev)
277{
278    struct ar8216_priv *priv = dev->phy_ptr;
279    unsigned char *buf;
280
281    if (unlikely(!priv))
282        goto error;
283
284    if (!priv->vlan)
285        goto send;
286
287    if (unlikely(skb_headroom(skb) < 2)) {
288        if (pskb_expand_head(skb, 2, 0, GFP_ATOMIC) < 0)
289            goto error;
290    }
291
292    buf = skb_push(skb, 2);
293    buf[0] = 0x10;
294    buf[1] = 0x80;
295
296send:
297    return priv->ndo_old->ndo_start_xmit(skb, dev);
298
299error:
300    dev_kfree_skb_any(skb);
301    return 0;
302}
303
304static int
305ar8216_mangle_rx(struct sk_buff *skb, int napi)
306{
307    struct ar8216_priv *priv;
308    struct net_device *dev;
309    unsigned char *buf;
310    int port, vlan;
311
312    dev = skb->dev;
313    if (!dev)
314        goto error;
315
316    priv = dev->phy_ptr;
317    if (!priv)
318        goto error;
319
320    /* don't strip the header if vlan mode is disabled */
321    if (!priv->vlan)
322        goto recv;
323
324    /* strip header, get vlan id */
325    buf = skb->data;
326    skb_pull(skb, 2);
327
328    /* check for vlan header presence */
329    if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
330        goto recv;
331
332    port = buf[0] & 0xf;
333
334    /* no need to fix up packets coming from a tagged source */
335    if (priv->vlan_tagged & (1 << port))
336        goto recv;
337
338    /* lookup port vid from local table, the switch passes an invalid vlan id */
339    vlan = priv->vlan_id[priv->pvid[port]];
340
341    buf[14 + 2] &= 0xf0;
342    buf[14 + 2] |= vlan >> 8;
343    buf[15 + 2] = vlan & 0xff;
344
345recv:
346    skb->protocol = eth_type_trans(skb, skb->dev);
347
348    if (napi)
349        return netif_receive_skb(skb);
350    else
351        return netif_rx(skb);
352
353error:
354    /* no vlan? eat the packet! */
355    dev_kfree_skb_any(skb);
356    return NET_RX_DROP;
357}
358
359static int
360ar8216_netif_rx(struct sk_buff *skb)
361{
362    return ar8216_mangle_rx(skb, 0);
363}
364
365static int
366ar8216_netif_receive_skb(struct sk_buff *skb)
367{
368    return ar8216_mangle_rx(skb, 1);
369}
370
371
372static struct switch_attr ar8216_globals[] = {
373    {
374        .type = SWITCH_TYPE_INT,
375        .name = "enable_vlan",
376        .description = "Enable VLAN mode",
377        .set = ar8216_set_vlan,
378        .get = ar8216_get_vlan,
379        .max = 1
380    },
381};
382
383static struct switch_attr ar8216_port[] = {
384    {
385        .type = SWITCH_TYPE_STRING,
386        .name = "link",
387        .description = "Get port link information",
388        .max = 1,
389        .set = NULL,
390        .get = ar8216_port_get_link,
391    },
392};
393
394static struct switch_attr ar8216_vlan[] = {
395    {
396        .type = SWITCH_TYPE_INT,
397        .name = "vid",
398        .description = "VLAN ID (0-4094)",
399        .set = ar8216_set_vid,
400        .get = ar8216_get_vid,
401        .max = 4094,
402    },
403};
404
405
406static int
407ar8216_get_ports(struct switch_dev *dev, struct switch_val *val)
408{
409    struct ar8216_priv *priv = to_ar8216(dev);
410    u8 ports = priv->vlan_table[val->port_vlan];
411    int i;
412
413    val->len = 0;
414    for (i = 0; i < AR8216_NUM_PORTS; i++) {
415        struct switch_port *p;
416
417        if (!(ports & (1 << i)))
418            continue;
419
420        p = &val->value.ports[val->len++];
421        p->id = i;
422        if (priv->vlan_tagged & (1 << i))
423            p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
424        else
425            p->flags = 0;
426    }
427    return 0;
428}
429
430static int
431ar8216_set_ports(struct switch_dev *dev, struct switch_val *val)
432{
433    struct ar8216_priv *priv = to_ar8216(dev);
434    u8 *vt = &priv->vlan_table[val->port_vlan];
435    int i, j;
436
437    *vt = 0;
438    for (i = 0; i < val->len; i++) {
439        struct switch_port *p = &val->value.ports[i];
440
441        if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
442            priv->vlan_tagged |= (1 << p->id);
443        else {
444            priv->vlan_tagged &= ~(1 << p->id);
445            priv->pvid[p->id] = val->port_vlan;
446
447            /* make sure that an untagged port does not
448             * appear in other vlans */
449            for (j = 0; j < AR8X16_MAX_VLANS; j++) {
450                if (j == val->port_vlan)
451                    continue;
452                priv->vlan_table[j] &= ~(1 << p->id);
453            }
454        }
455
456        *vt |= 1 << p->id;
457    }
458    return 0;
459}
460
461static int
462ar8216_wait_bit(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
463{
464    int timeout = 20;
465
466    while ((priv->read(priv, reg) & mask) != val) {
467        if (timeout-- <= 0) {
468            printk(KERN_ERR "ar8216: timeout waiting for operation to complete\n");
469            return 1;
470        }
471    }
472    return 0;
473}
474
475static void
476ar8216_vtu_op(struct ar8216_priv *priv, u32 op, u32 val)
477{
478    if (ar8216_wait_bit(priv, AR8216_REG_VTU, AR8216_VTU_ACTIVE, 0))
479        return;
480    if ((op & AR8216_VTU_OP) == AR8216_VTU_OP_LOAD) {
481        val &= AR8216_VTUDATA_MEMBER;
482        val |= AR8216_VTUDATA_VALID;
483        priv->write(priv, AR8216_REG_VTU_DATA, val);
484    }
485    op |= AR8216_VTU_ACTIVE;
486    priv->write(priv, AR8216_REG_VTU, op);
487}
488
489static int
490ar8216_hw_apply(struct switch_dev *dev)
491{
492    struct ar8216_priv *priv = to_ar8216(dev);
493    u8 portmask[AR8216_NUM_PORTS];
494    int i, j;
495
496    mutex_lock(&priv->reg_mutex);
497    /* flush all vlan translation unit entries */
498    ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
499
500    memset(portmask, 0, sizeof(portmask));
501    if (priv->vlan) {
502        /* calculate the port destination masks and load vlans
503         * into the vlan translation unit */
504        for (j = 0; j < AR8X16_MAX_VLANS; j++) {
505            u8 vp = priv->vlan_table[j];
506
507            if (!vp)
508                continue;
509
510            for (i = 0; i < AR8216_NUM_PORTS; i++) {
511                u8 mask = (1 << i);
512                if (vp & mask)
513                    portmask[i] |= vp & ~mask;
514            }
515
516            ar8216_vtu_op(priv,
517                AR8216_VTU_OP_LOAD |
518                (priv->vlan_id[j] << AR8216_VTU_VID_S),
519                priv->vlan_table[j]);
520        }
521    } else {
522        /* vlan disabled:
523         * isolate all ports, but connect them to the cpu port */
524        for (i = 0; i < AR8216_NUM_PORTS; i++) {
525            if (i == AR8216_PORT_CPU)
526                continue;
527
528            portmask[i] = 1 << AR8216_PORT_CPU;
529            portmask[AR8216_PORT_CPU] |= (1 << i);
530        }
531    }
532
533    /* update the port destination mask registers and tag settings */
534    for (i = 0; i < AR8216_NUM_PORTS; i++) {
535        int egress, ingress;
536        int pvid;
537
538        if (priv->vlan) {
539            pvid = priv->vlan_id[priv->pvid[i]];
540        } else {
541            pvid = i;
542        }
543
544        if (priv->vlan && (priv->vlan_tagged & (1 << i))) {
545            egress = AR8216_OUT_ADD_VLAN;
546        } else {
547            egress = AR8216_OUT_STRIP_VLAN;
548        }
549        if (priv->vlan) {
550            ingress = AR8216_IN_SECURE;
551        } else {
552            ingress = AR8216_IN_PORT_ONLY;
553        }
554
555        ar8216_rmw(priv, AR8216_REG_PORT_CTRL(i),
556            AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
557            AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
558            AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
559            AR8216_PORT_CTRL_LEARN |
560              (priv->vlan && i == AR8216_PORT_CPU && (priv->chip == AR8216) ?
561               AR8216_PORT_CTRL_HEADER : 0) |
562              (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
563              (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
564
565        ar8216_rmw(priv, AR8216_REG_PORT_VLAN(i),
566            AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
567              AR8216_PORT_VLAN_DEFAULT_ID,
568            (portmask[i] << AR8216_PORT_VLAN_DEST_PORTS_S) |
569              (ingress << AR8216_PORT_VLAN_MODE_S) |
570              (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
571    }
572    mutex_unlock(&priv->reg_mutex);
573    return 0;
574}
575
576static int
577ar8316_hw_init(struct ar8216_priv *priv) {
578    int i;
579    u32 val, newval;
580    struct mii_bus *bus;
581
582    val = priv->read(priv, 0x8);
583
584    if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
585        if (priv->port4_phy) {
586            /* value taken from Ubiquiti RouterStation Pro */
587            newval = 0x81461bea;
588            printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
589        } else {
590            newval = 0x01261be2;
591            printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
592        }
593    } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
594        /* value taken from AVM Fritz!Box 7390 sources */
595        newval = 0x010e5b71;
596    } else {
597        /* no known value for phy interface */
598        printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
599            priv->phy->interface);
600        return -EINVAL;
601    }
602
603    if (val == newval)
604        goto out;
605
606    priv->write(priv, 0x8, newval);
607
608    /* standard atheros magic */
609    priv->write(priv, 0x38, 0xc000050e);
610
611    /* Initialize the ports */
612    bus = priv->phy->bus;
613    for (i = 0; i < 5; i++) {
614        if ((i == 4) && priv->port4_phy &&
615            priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
616            /* work around for phy4 rgmii mode */
617            mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x12);
618            mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x480c);
619            /* rx delay */
620            mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x0);
621            mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x824e);
622            /* tx delay */
623            mdiobus_write(bus, i, MII_ATH_DBG_ADDR, 0x5);
624            mdiobus_write(bus, i, MII_ATH_DBG_DATA, 0x3d47);
625            msleep(1000);
626        }
627
628        /* initialize the port itself */
629        mdiobus_write(bus, i, MII_ADVERTISE,
630            ADVERTISE_ALL | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
631        mdiobus_write(bus, i, MII_CTRL1000, ADVERTISE_1000FULL);
632        mdiobus_write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
633        msleep(1000);
634    }
635
636out:
637    priv->initialized = true;
638    return 0;
639}
640
641static int
642ar8216_reset_switch(struct switch_dev *dev)
643{
644    struct ar8216_priv *priv = to_ar8216(dev);
645    int i;
646
647    mutex_lock(&priv->reg_mutex);
648    memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
649        offsetof(struct ar8216_priv, vlan));
650    for (i = 0; i < AR8X16_MAX_VLANS; i++) {
651        priv->vlan_id[i] = i;
652    }
653    for (i = 0; i < AR8216_NUM_PORTS; i++) {
654        /* Enable port learning and tx */
655        priv->write(priv, AR8216_REG_PORT_CTRL(i),
656            AR8216_PORT_CTRL_LEARN |
657            (4 << AR8216_PORT_CTRL_STATE_S));
658
659        priv->write(priv, AR8216_REG_PORT_VLAN(i), 0);
660
661        /* Configure all PHYs */
662        if (i == AR8216_PORT_CPU) {
663            priv->write(priv, AR8216_REG_PORT_STATUS(i),
664                AR8216_PORT_STATUS_LINK_UP |
665                ((priv->chip == AR8316) ?
666                    AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
667                AR8216_PORT_STATUS_TXMAC |
668                AR8216_PORT_STATUS_RXMAC |
669                ((priv->chip == AR8316) ? AR8216_PORT_STATUS_RXFLOW : 0) |
670                ((priv->chip == AR8316) ? AR8216_PORT_STATUS_TXFLOW : 0) |
671                AR8216_PORT_STATUS_DUPLEX);
672        } else {
673            priv->write(priv, AR8216_REG_PORT_STATUS(i),
674                AR8216_PORT_STATUS_LINK_AUTO);
675        }
676    }
677    /* XXX: undocumented magic from atheros, required! */
678    priv->write(priv, 0x38, 0xc000050e);
679
680    if (priv->chip == AR8216) {
681        ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
682            AR8216_GCTRL_MTU, 1518 + 8 + 2);
683    } else if (priv->chip == AR8316) {
684        /* enable jumbo frames */
685        ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
686            AR8316_GCTRL_MTU, 9018 + 8 + 2);
687    }
688
689    if (priv->chip == AR8316) {
690        /* enable cpu port to receive multicast and broadcast frames */
691        priv->write(priv, AR8216_REG_FLOOD_MASK, 0x003f003f);
692    }
693    mutex_unlock(&priv->reg_mutex);
694    return ar8216_hw_apply(dev);
695}
696
697
698static const struct switch_dev_ops ar8216_ops = {
699    .attr_global = {
700        .attr = ar8216_globals,
701        .n_attr = ARRAY_SIZE(ar8216_globals),
702    },
703    .attr_port = {
704        .attr = ar8216_port,
705        .n_attr = ARRAY_SIZE(ar8216_port),
706    },
707    .attr_vlan = {
708        .attr = ar8216_vlan,
709        .n_attr = ARRAY_SIZE(ar8216_vlan),
710    },
711    .get_port_pvid = ar8216_get_pvid,
712    .set_port_pvid = ar8216_set_pvid,
713    .get_vlan_ports = ar8216_get_ports,
714    .set_vlan_ports = ar8216_set_ports,
715    .apply_config = ar8216_hw_apply,
716    .reset_switch = ar8216_reset_switch,
717};
718
719static int
720ar8216_config_init(struct phy_device *pdev)
721{
722    struct ar8216_priv *priv = pdev->priv;
723    struct net_device *dev = pdev->attached_dev;
724    struct switch_dev *swdev;
725    int ret;
726
727    if (!priv) {
728        priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
729        if (priv == NULL)
730            return -ENOMEM;
731    }
732
733    priv->phy = pdev;
734
735    priv->chip = ar8216_id_chip(priv);
736
737    if (pdev->addr != 0) {
738        if (priv->chip == AR8316) {
739            pdev->supported |= SUPPORTED_1000baseT_Full;
740            pdev->advertising |= ADVERTISED_1000baseT_Full;
741
742            /* check if we're attaching to the switch twice */
743            pdev = pdev->bus->phy_map[0];
744            if (!pdev) {
745                kfree(priv);
746                return 0;
747            }
748
749            /* switch device has not been initialized, reuse priv */
750            if (!pdev->priv) {
751                priv->port4_phy = true;
752                pdev->priv = priv;
753                return 0;
754            }
755
756            kfree(priv);
757
758            /* switch device has been initialized, reinit */
759            priv = pdev->priv;
760            priv->dev.ports = (AR8216_NUM_PORTS - 1);
761            priv->initialized = false;
762            priv->port4_phy = true;
763            ar8316_hw_init(priv);
764            return 0;
765        }
766
767        kfree(priv);
768        return 0;
769    }
770
771    printk(KERN_INFO "%s: AR%d switch driver attached.\n",
772        pdev->attached_dev->name, priv->chip);
773
774    pdev->supported = priv->chip == AR8316 ?
775        SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
776    pdev->advertising = pdev->supported;
777
778    mutex_init(&priv->reg_mutex);
779    priv->read = ar8216_mii_read;
780    priv->write = ar8216_mii_write;
781
782    pdev->priv = priv;
783
784    swdev = &priv->dev;
785    swdev->cpu_port = AR8216_PORT_CPU;
786    swdev->ops = &ar8216_ops;
787    swdev->ports = AR8216_NUM_PORTS;
788
789    if (priv->chip == AR8316) {
790        swdev->name = "Atheros AR8316";
791        swdev->vlans = AR8X16_MAX_VLANS;
792
793        if (priv->port4_phy) {
794            /* port 5 connected to the other mac, therefore unusable */
795            swdev->ports = (AR8216_NUM_PORTS - 1);
796        }
797    } else {
798        swdev->name = "Atheros AR8216";
799        swdev->vlans = AR8216_NUM_VLANS;
800    }
801
802    if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
803        kfree(priv);
804        goto done;
805    }
806
807    if (priv->chip == AR8316) {
808        ret = ar8316_hw_init(priv);
809        if (ret) {
810            kfree(priv);
811            goto done;
812        }
813    }
814
815    ret = ar8216_reset_switch(&priv->dev);
816    if (ret) {
817        kfree(priv);
818        goto done;
819    }
820
821    dev->phy_ptr = priv;
822
823    /* VID fixup only needed on ar8216 */
824    if (pdev->addr == 0 && priv->chip == AR8216) {
825        pdev->pkt_align = 2;
826        pdev->netif_receive_skb = ar8216_netif_receive_skb;
827        pdev->netif_rx = ar8216_netif_rx;
828        priv->ndo_old = dev->netdev_ops;
829        memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
830        priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
831        dev->netdev_ops = &priv->ndo;
832    }
833
834done:
835    return ret;
836}
837
838static int
839ar8216_read_status(struct phy_device *phydev)
840{
841    struct ar8216_priv *priv = phydev->priv;
842    int ret;
843    if (phydev->addr != 0) {
844        return genphy_read_status(phydev);
845    }
846
847    phydev->speed = priv->chip == AR8316 ? SPEED_1000 : SPEED_100;
848    phydev->duplex = DUPLEX_FULL;
849    phydev->link = 1;
850
851    /* flush the address translation unit */
852    mutex_lock(&priv->reg_mutex);
853    ret = ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0);
854
855    if (!ret)
856        priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
857    else
858        ret = -ETIMEDOUT;
859    mutex_unlock(&priv->reg_mutex);
860
861    phydev->state = PHY_RUNNING;
862    netif_carrier_on(phydev->attached_dev);
863    phydev->adjust_link(phydev->attached_dev);
864
865    return ret;
866}
867
868static int
869ar8216_config_aneg(struct phy_device *phydev)
870{
871    if (phydev->addr == 0)
872        return 0;
873
874    return genphy_config_aneg(phydev);
875}
876
877static int
878ar8216_probe(struct phy_device *pdev)
879{
880    struct ar8216_priv priv;
881    u16 chip;
882
883    priv.phy = pdev;
884    chip = ar8216_id_chip(&priv);
885    if (chip == UNKNOWN)
886        return -ENODEV;
887
888    return 0;
889}
890
891static void
892ar8216_remove(struct phy_device *pdev)
893{
894    struct ar8216_priv *priv = pdev->priv;
895    struct net_device *dev = pdev->attached_dev;
896
897    if (!priv)
898        return;
899
900    if (priv->ndo_old && dev)
901        dev->netdev_ops = priv->ndo_old;
902    if (pdev->addr == 0)
903        unregister_switch(&priv->dev);
904    kfree(priv);
905}
906
907static struct phy_driver ar8216_driver = {
908    .phy_id = 0x004d0000,
909    .name = "Atheros AR8216/AR8316",
910    .phy_id_mask = 0xffff0000,
911    .features = PHY_BASIC_FEATURES,
912    .probe = ar8216_probe,
913    .remove = ar8216_remove,
914    .config_init = &ar8216_config_init,
915    .config_aneg = &ar8216_config_aneg,
916    .read_status = &ar8216_read_status,
917    .driver = { .owner = THIS_MODULE },
918};
919
920int __init
921ar8216_init(void)
922{
923    return phy_driver_register(&ar8216_driver);
924}
925
926void __exit
927ar8216_exit(void)
928{
929    phy_driver_unregister(&ar8216_driver);
930}
931
932module_init(ar8216_init);
933module_exit(ar8216_exit);
934MODULE_LICENSE("GPL");
935
936

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