Merge pull request #580 from wigyori/cc-libpcap
[15.05/openwrt.git] / target / linux / generic / files / drivers / net / phy / psb6970.c
1 /*
2  * Lantiq PSB6970 (Tantos) Switch driver
3  *
4  * Copyright (c) 2009,2010 Team Embedded.
5  *
6  * This program is free software; you can redistribute  it and/or modify it
7  * under  the terms of the GNU General Public License v2 as published by the
8  * Free Software Foundation.
9  *
10  * The switch programming done in this driver follows the 
11  * "Ethernet Traffic Separation using VLAN" Application Note as
12  * published by Lantiq.
13  */
14
15 #include <linux/module.h>
16 #include <linux/netdevice.h>
17 #include <linux/switch.h>
18 #include <linux/phy.h>
19
20 #define PSB6970_MAX_VLANS               16
21 #define PSB6970_NUM_PORTS               7
22 #define PSB6970_DEFAULT_PORT_CPU        6
23 #define PSB6970_IS_CPU_PORT(x)          ((x) > 4)
24
25 #define PHYADDR(_reg)           ((_reg >> 5) & 0xff), (_reg & 0x1f)
26
27 /* --- Identification --- */
28 #define PSB6970_CI0             0x0100
29 #define PSB6970_CI0_MASK        0x000f
30 #define PSB6970_CI1             0x0101
31 #define PSB6970_CI1_VAL         0x2599
32 #define PSB6970_CI1_MASK        0xffff
33
34 /* --- VLAN filter table --- */
35 #define PSB6970_VFxL(i)         ((i)*2+0x10)    /* VLAN Filter Low */
36 #define PSB6970_VFxL_VV         (1 << 15)       /* VLAN_Valid */
37
38 #define PSB6970_VFxH(i)         ((i)*2+0x11)    /* VLAN Filter High */
39 #define PSB6970_VFxH_TM_SHIFT   7               /* Tagged Member */
40
41 /* --- Port registers --- */
42 #define PSB6970_EC(p)           ((p)*0x20+2)    /* Extended Control */
43 #define PSB6970_EC_IFNTE        (1 << 1)        /* Input Force No Tag Enable */
44
45 #define PSB6970_PBVM(p)         ((p)*0x20+3)    /* Port Base VLAN Map */
46 #define PSB6970_PBVM_VMCE       (1 << 8)
47 #define PSB6970_PBVM_AOVTP      (1 << 9)
48 #define PSB6970_PBVM_VSD        (1 << 10)
49 #define PSB6970_PBVM_VC         (1 << 11)       /* VID Check with VID table */
50 #define PSB6970_PBVM_TBVE       (1 << 13)       /* Tag-Based VLAN enable */
51
52 #define PSB6970_DVID(p)         ((p)*0x20+4)    /* Default VLAN ID & Priority */
53
54 struct psb6970_priv {
55         struct switch_dev dev;
56         struct phy_device *phy;
57         u16 (*read) (struct phy_device* phydev, int reg);
58         void (*write) (struct phy_device* phydev, int reg, u16 val);
59         struct mutex reg_mutex;
60
61         /* all fields below are cleared on reset */
62         bool vlan;
63         u16 vlan_id[PSB6970_MAX_VLANS];
64         u8 vlan_table[PSB6970_MAX_VLANS];
65         u8 vlan_tagged;
66         u16 pvid[PSB6970_NUM_PORTS];
67 };
68
69 #define to_psb6970(_dev) container_of(_dev, struct psb6970_priv, dev)
70
71 static u16 psb6970_mii_read(struct phy_device *phydev, int reg)
72 {
73         return phydev->bus->read(phydev->bus, PHYADDR(reg));
74 }
75
76 static void psb6970_mii_write(struct phy_device *phydev, int reg, u16 val)
77 {
78         phydev->bus->write(phydev->bus, PHYADDR(reg), val);
79 }
80
81 static int
82 psb6970_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
83                  struct switch_val *val)
84 {
85         struct psb6970_priv *priv = to_psb6970(dev);
86         priv->vlan = !!val->value.i;
87         return 0;
88 }
89
90 static int
91 psb6970_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
92                  struct switch_val *val)
93 {
94         struct psb6970_priv *priv = to_psb6970(dev);
95         val->value.i = priv->vlan;
96         return 0;
97 }
98
99 static int psb6970_set_pvid(struct switch_dev *dev, int port, int vlan)
100 {
101         struct psb6970_priv *priv = to_psb6970(dev);
102
103         /* make sure no invalid PVIDs get set */
104         if (vlan >= dev->vlans)
105                 return -EINVAL;
106
107         priv->pvid[port] = vlan;
108         return 0;
109 }
110
111 static int psb6970_get_pvid(struct switch_dev *dev, int port, int *vlan)
112 {
113         struct psb6970_priv *priv = to_psb6970(dev);
114         *vlan = priv->pvid[port];
115         return 0;
116 }
117
118 static int
119 psb6970_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
120                 struct switch_val *val)
121 {
122         struct psb6970_priv *priv = to_psb6970(dev);
123         priv->vlan_id[val->port_vlan] = val->value.i;
124         return 0;
125 }
126
127 static int
128 psb6970_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
129                 struct switch_val *val)
130 {
131         struct psb6970_priv *priv = to_psb6970(dev);
132         val->value.i = priv->vlan_id[val->port_vlan];
133         return 0;
134 }
135
136 static struct switch_attr psb6970_globals[] = {
137         {
138          .type = SWITCH_TYPE_INT,
139          .name = "enable_vlan",
140          .description = "Enable VLAN mode",
141          .set = psb6970_set_vlan,
142          .get = psb6970_get_vlan,
143          .max = 1},
144 };
145
146 static struct switch_attr psb6970_port[] = {
147 };
148
149 static struct switch_attr psb6970_vlan[] = {
150         {
151          .type = SWITCH_TYPE_INT,
152          .name = "vid",
153          .description = "VLAN ID (0-4094)",
154          .set = psb6970_set_vid,
155          .get = psb6970_get_vid,
156          .max = 4094,
157          },
158 };
159
160 static int psb6970_get_ports(struct switch_dev *dev, struct switch_val *val)
161 {
162         struct psb6970_priv *priv = to_psb6970(dev);
163         u8 ports = priv->vlan_table[val->port_vlan];
164         int i;
165
166         val->len = 0;
167         for (i = 0; i < PSB6970_NUM_PORTS; i++) {
168                 struct switch_port *p;
169
170                 if (!(ports & (1 << i)))
171                         continue;
172
173                 p = &val->value.ports[val->len++];
174                 p->id = i;
175                 if (priv->vlan_tagged & (1 << i))
176                         p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
177                 else
178                         p->flags = 0;
179         }
180         return 0;
181 }
182
183 static int psb6970_set_ports(struct switch_dev *dev, struct switch_val *val)
184 {
185         struct psb6970_priv *priv = to_psb6970(dev);
186         u8 *vt = &priv->vlan_table[val->port_vlan];
187         int i, j;
188
189         *vt = 0;
190         for (i = 0; i < val->len; i++) {
191                 struct switch_port *p = &val->value.ports[i];
192
193                 if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
194                         priv->vlan_tagged |= (1 << p->id);
195                 else {
196                         priv->vlan_tagged &= ~(1 << p->id);
197                         priv->pvid[p->id] = val->port_vlan;
198
199                         /* make sure that an untagged port does not
200                          * appear in other vlans */
201                         for (j = 0; j < PSB6970_MAX_VLANS; j++) {
202                                 if (j == val->port_vlan)
203                                         continue;
204                                 priv->vlan_table[j] &= ~(1 << p->id);
205                         }
206                 }
207
208                 *vt |= 1 << p->id;
209         }
210         return 0;
211 }
212
213 static int psb6970_hw_apply(struct switch_dev *dev)
214 {
215         struct psb6970_priv *priv = to_psb6970(dev);
216         int i, j;
217
218         mutex_lock(&priv->reg_mutex);
219
220         if (priv->vlan) {
221                 /* into the vlan translation unit */
222                 for (j = 0; j < PSB6970_MAX_VLANS; j++) {
223                         u8 vp = priv->vlan_table[j];
224
225                         if (vp) {
226                                 priv->write(priv->phy, PSB6970_VFxL(j),
227                                             PSB6970_VFxL_VV | priv->vlan_id[j]);
228                                 priv->write(priv->phy, PSB6970_VFxH(j),
229                                             ((vp & priv->
230                                               vlan_tagged) <<
231                                              PSB6970_VFxH_TM_SHIFT) | vp);
232                         } else  /* clear VLAN Valid flag for unused vlans */
233                                 priv->write(priv->phy, PSB6970_VFxL(j), 0);
234
235                 }
236         }
237
238         /* update the port destination mask registers and tag settings */
239         for (i = 0; i < PSB6970_NUM_PORTS; i++) {
240                 int dvid = 1, pbvm = 0x7f | PSB6970_PBVM_VSD, ec = 0;
241
242                 if (priv->vlan) {
243                         ec = PSB6970_EC_IFNTE;
244                         dvid = priv->vlan_id[priv->pvid[i]];
245                         pbvm |= PSB6970_PBVM_TBVE | PSB6970_PBVM_VMCE;
246
247                         if ((i << 1) & priv->vlan_tagged)
248                                 pbvm |= PSB6970_PBVM_AOVTP | PSB6970_PBVM_VC;
249                 }
250
251                 priv->write(priv->phy, PSB6970_PBVM(i), pbvm);
252
253                 if (!PSB6970_IS_CPU_PORT(i)) {
254                         priv->write(priv->phy, PSB6970_EC(i), ec);
255                         priv->write(priv->phy, PSB6970_DVID(i), dvid);
256                 }
257         }
258
259         mutex_unlock(&priv->reg_mutex);
260         return 0;
261 }
262
263 static int psb6970_reset_switch(struct switch_dev *dev)
264 {
265         struct psb6970_priv *priv = to_psb6970(dev);
266         int i;
267
268         mutex_lock(&priv->reg_mutex);
269
270         memset(&priv->vlan, 0, sizeof(struct psb6970_priv) -
271                offsetof(struct psb6970_priv, vlan));
272
273         for (i = 0; i < PSB6970_MAX_VLANS; i++)
274                 priv->vlan_id[i] = i;
275
276         mutex_unlock(&priv->reg_mutex);
277
278         return psb6970_hw_apply(dev);
279 }
280
281 static const struct switch_dev_ops psb6970_ops = {
282         .attr_global = {
283                         .attr = psb6970_globals,
284                         .n_attr = ARRAY_SIZE(psb6970_globals),
285                         },
286         .attr_port = {
287                       .attr = psb6970_port,
288                       .n_attr = ARRAY_SIZE(psb6970_port),
289                       },
290         .attr_vlan = {
291                       .attr = psb6970_vlan,
292                       .n_attr = ARRAY_SIZE(psb6970_vlan),
293                       },
294         .get_port_pvid = psb6970_get_pvid,
295         .set_port_pvid = psb6970_set_pvid,
296         .get_vlan_ports = psb6970_get_ports,
297         .set_vlan_ports = psb6970_set_ports,
298         .apply_config = psb6970_hw_apply,
299         .reset_switch = psb6970_reset_switch,
300 };
301
302 static int psb6970_config_init(struct phy_device *pdev)
303 {
304         struct psb6970_priv *priv;
305         struct net_device *dev = pdev->attached_dev;
306         struct switch_dev *swdev;
307         int ret;
308
309         priv = kzalloc(sizeof(struct psb6970_priv), GFP_KERNEL);
310         if (priv == NULL)
311                 return -ENOMEM;
312
313         priv->phy = pdev;
314
315         if (pdev->addr == 0)
316                 printk(KERN_INFO "%s: psb6970 switch driver attached.\n",
317                        pdev->attached_dev->name);
318
319         if (pdev->addr != 0) {
320                 kfree(priv);
321                 return 0;
322         }
323
324         pdev->supported = pdev->advertising = SUPPORTED_100baseT_Full;
325
326         mutex_init(&priv->reg_mutex);
327         priv->read = psb6970_mii_read;
328         priv->write = psb6970_mii_write;
329
330         pdev->priv = priv;
331
332         swdev = &priv->dev;
333         swdev->cpu_port = PSB6970_DEFAULT_PORT_CPU;
334         swdev->ops = &psb6970_ops;
335
336         swdev->name = "Lantiq PSB6970";
337         swdev->vlans = PSB6970_MAX_VLANS;
338         swdev->ports = PSB6970_NUM_PORTS;
339
340         if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
341                 kfree(priv);
342                 goto done;
343         }
344
345         ret = psb6970_reset_switch(&priv->dev);
346         if (ret) {
347                 kfree(priv);
348                 goto done;
349         }
350
351         dev->phy_ptr = priv;
352
353 done:
354         return ret;
355 }
356
357 static int psb6970_read_status(struct phy_device *phydev)
358 {
359         phydev->speed = SPEED_100;
360         phydev->duplex = DUPLEX_FULL;
361         phydev->link = 1;
362
363         phydev->state = PHY_RUNNING;
364         netif_carrier_on(phydev->attached_dev);
365         phydev->adjust_link(phydev->attached_dev);
366
367         return 0;
368 }
369
370 static int psb6970_config_aneg(struct phy_device *phydev)
371 {
372         return 0;
373 }
374
375 static int psb6970_probe(struct phy_device *pdev)
376 {
377         return 0;
378 }
379
380 static void psb6970_remove(struct phy_device *pdev)
381 {
382         struct psb6970_priv *priv = pdev->priv;
383
384         if (!priv)
385                 return;
386
387         if (pdev->addr == 0)
388                 unregister_switch(&priv->dev);
389         kfree(priv);
390 }
391
392 static int psb6970_fixup(struct phy_device *dev)
393 {
394         struct mii_bus *bus = dev->bus;
395         u16 reg;
396
397         /* look for the switch on the bus */
398         reg = bus->read(bus, PHYADDR(PSB6970_CI1)) & PSB6970_CI1_MASK;
399         if (reg != PSB6970_CI1_VAL)
400                 return 0;
401
402         dev->phy_id = (reg << 16);
403         dev->phy_id |= bus->read(bus, PHYADDR(PSB6970_CI0)) & PSB6970_CI0_MASK;
404
405         return 0;
406 }
407
408 static struct phy_driver psb6970_driver = {
409         .name = "Lantiq PSB6970",
410         .phy_id = PSB6970_CI1_VAL << 16,
411         .phy_id_mask = 0xffff0000,
412         .features = PHY_BASIC_FEATURES,
413         .probe = psb6970_probe,
414         .remove = psb6970_remove,
415         .config_init = &psb6970_config_init,
416         .config_aneg = &psb6970_config_aneg,
417         .read_status = &psb6970_read_status,
418         .driver = {.owner = THIS_MODULE},
419 };
420
421 int __init psb6970_init(void)
422 {
423         phy_register_fixup_for_id(PHY_ANY_ID, psb6970_fixup);
424         return phy_driver_register(&psb6970_driver);
425 }
426
427 module_init(psb6970_init);
428
429 void __exit psb6970_exit(void)
430 {
431         phy_driver_unregister(&psb6970_driver);
432 }
433
434 module_exit(psb6970_exit);
435
436 MODULE_DESCRIPTION("Lantiq PSB6970 Switch");
437 MODULE_AUTHOR("Ithamar R. Adema <ithamar.adema@team-embedded.nl>");
438 MODULE_LICENSE("GPL");