Commit | Line | Data |
---|---|---|
91da11f8 LB |
1 | /* |
2 | * net/dsa/dsa.c - Hardware switch handling | |
e84665c9 | 3 | * Copyright (c) 2008-2009 Marvell Semiconductor |
5e95329b | 4 | * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> |
91da11f8 LB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
51579c3f GR |
12 | #include <linux/ctype.h> |
13 | #include <linux/device.h> | |
14 | #include <linux/hwmon.h> | |
91da11f8 | 15 | #include <linux/list.h> |
91da11f8 | 16 | #include <linux/platform_device.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
3a9a231d | 18 | #include <linux/module.h> |
91da11f8 | 19 | #include <net/dsa.h> |
5e95329b FF |
20 | #include <linux/of.h> |
21 | #include <linux/of_mdio.h> | |
22 | #include <linux/of_platform.h> | |
769a0202 | 23 | #include <linux/of_net.h> |
51579c3f | 24 | #include <linux/sysfs.h> |
91da11f8 LB |
25 | #include "dsa_priv.h" |
26 | ||
27 | char dsa_driver_version[] = "0.1"; | |
28 | ||
29 | ||
30 | /* switch driver registration ***********************************************/ | |
31 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
32 | static LIST_HEAD(dsa_switch_drivers); | |
33 | ||
34 | void register_switch_driver(struct dsa_switch_driver *drv) | |
35 | { | |
36 | mutex_lock(&dsa_switch_drivers_mutex); | |
37 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
38 | mutex_unlock(&dsa_switch_drivers_mutex); | |
39 | } | |
ad293b8a | 40 | EXPORT_SYMBOL_GPL(register_switch_driver); |
91da11f8 LB |
41 | |
42 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
43 | { | |
44 | mutex_lock(&dsa_switch_drivers_mutex); | |
45 | list_del_init(&drv->list); | |
46 | mutex_unlock(&dsa_switch_drivers_mutex); | |
47 | } | |
ad293b8a | 48 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
91da11f8 LB |
49 | |
50 | static struct dsa_switch_driver * | |
b4d2394d | 51 | dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name) |
91da11f8 LB |
52 | { |
53 | struct dsa_switch_driver *ret; | |
54 | struct list_head *list; | |
55 | char *name; | |
56 | ||
57 | ret = NULL; | |
58 | name = NULL; | |
59 | ||
60 | mutex_lock(&dsa_switch_drivers_mutex); | |
61 | list_for_each(list, &dsa_switch_drivers) { | |
62 | struct dsa_switch_driver *drv; | |
63 | ||
64 | drv = list_entry(list, struct dsa_switch_driver, list); | |
65 | ||
b4d2394d | 66 | name = drv->probe(host_dev, sw_addr); |
91da11f8 LB |
67 | if (name != NULL) { |
68 | ret = drv; | |
69 | break; | |
70 | } | |
71 | } | |
72 | mutex_unlock(&dsa_switch_drivers_mutex); | |
73 | ||
74 | *_name = name; | |
75 | ||
76 | return ret; | |
77 | } | |
78 | ||
51579c3f GR |
79 | /* hwmon support ************************************************************/ |
80 | ||
81 | #ifdef CONFIG_NET_DSA_HWMON | |
82 | ||
83 | static ssize_t temp1_input_show(struct device *dev, | |
84 | struct device_attribute *attr, char *buf) | |
85 | { | |
86 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
87 | int temp, ret; | |
88 | ||
89 | ret = ds->drv->get_temp(ds, &temp); | |
90 | if (ret < 0) | |
91 | return ret; | |
92 | ||
93 | return sprintf(buf, "%d\n", temp * 1000); | |
94 | } | |
95 | static DEVICE_ATTR_RO(temp1_input); | |
96 | ||
97 | static ssize_t temp1_max_show(struct device *dev, | |
98 | struct device_attribute *attr, char *buf) | |
99 | { | |
100 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
101 | int temp, ret; | |
102 | ||
103 | ret = ds->drv->get_temp_limit(ds, &temp); | |
104 | if (ret < 0) | |
105 | return ret; | |
106 | ||
107 | return sprintf(buf, "%d\n", temp * 1000); | |
108 | } | |
109 | ||
110 | static ssize_t temp1_max_store(struct device *dev, | |
111 | struct device_attribute *attr, const char *buf, | |
112 | size_t count) | |
113 | { | |
114 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
115 | int temp, ret; | |
116 | ||
117 | ret = kstrtoint(buf, 0, &temp); | |
118 | if (ret < 0) | |
119 | return ret; | |
120 | ||
121 | ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000)); | |
122 | if (ret < 0) | |
123 | return ret; | |
124 | ||
125 | return count; | |
126 | } | |
e3122b7f | 127 | static DEVICE_ATTR_RW(temp1_max); |
51579c3f GR |
128 | |
129 | static ssize_t temp1_max_alarm_show(struct device *dev, | |
130 | struct device_attribute *attr, char *buf) | |
131 | { | |
132 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
133 | bool alarm; | |
134 | int ret; | |
135 | ||
136 | ret = ds->drv->get_temp_alarm(ds, &alarm); | |
137 | if (ret < 0) | |
138 | return ret; | |
139 | ||
140 | return sprintf(buf, "%d\n", alarm); | |
141 | } | |
142 | static DEVICE_ATTR_RO(temp1_max_alarm); | |
143 | ||
144 | static struct attribute *dsa_hwmon_attrs[] = { | |
145 | &dev_attr_temp1_input.attr, /* 0 */ | |
146 | &dev_attr_temp1_max.attr, /* 1 */ | |
147 | &dev_attr_temp1_max_alarm.attr, /* 2 */ | |
148 | NULL | |
149 | }; | |
150 | ||
151 | static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj, | |
152 | struct attribute *attr, int index) | |
153 | { | |
154 | struct device *dev = container_of(kobj, struct device, kobj); | |
155 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
156 | struct dsa_switch_driver *drv = ds->drv; | |
157 | umode_t mode = attr->mode; | |
158 | ||
159 | if (index == 1) { | |
160 | if (!drv->get_temp_limit) | |
161 | mode = 0; | |
e3122b7f VD |
162 | else if (!drv->set_temp_limit) |
163 | mode &= ~S_IWUSR; | |
51579c3f GR |
164 | } else if (index == 2 && !drv->get_temp_alarm) { |
165 | mode = 0; | |
166 | } | |
167 | return mode; | |
168 | } | |
169 | ||
170 | static const struct attribute_group dsa_hwmon_group = { | |
171 | .attrs = dsa_hwmon_attrs, | |
172 | .is_visible = dsa_hwmon_attrs_visible, | |
173 | }; | |
174 | __ATTRIBUTE_GROUPS(dsa_hwmon); | |
175 | ||
176 | #endif /* CONFIG_NET_DSA_HWMON */ | |
91da11f8 LB |
177 | |
178 | /* basic switch operations **************************************************/ | |
39b0c705 AL |
179 | static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master) |
180 | { | |
181 | struct dsa_chip_data *cd = ds->pd; | |
182 | struct device_node *port_dn; | |
183 | struct phy_device *phydev; | |
e4485346 | 184 | int ret, port, mode; |
39b0c705 AL |
185 | |
186 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
187 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
188 | continue; | |
189 | ||
190 | port_dn = cd->port_dn[port]; | |
191 | if (of_phy_is_fixed_link(port_dn)) { | |
192 | ret = of_phy_register_fixed_link(port_dn); | |
193 | if (ret) { | |
194 | netdev_err(master, | |
195 | "failed to register fixed PHY\n"); | |
196 | return ret; | |
197 | } | |
198 | phydev = of_phy_find_device(port_dn); | |
e4485346 AL |
199 | |
200 | mode = of_get_phy_mode(port_dn); | |
201 | if (mode < 0) | |
202 | mode = PHY_INTERFACE_MODE_NA; | |
203 | phydev->interface = mode; | |
204 | ||
39b0c705 AL |
205 | genphy_config_init(phydev); |
206 | genphy_read_status(phydev); | |
207 | if (ds->drv->adjust_link) | |
208 | ds->drv->adjust_link(ds, port, phydev); | |
209 | } | |
210 | } | |
211 | return 0; | |
212 | } | |
213 | ||
df197195 | 214 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 215 | { |
df197195 FF |
216 | struct dsa_switch_driver *drv = ds->drv; |
217 | struct dsa_switch_tree *dst = ds->dst; | |
218 | struct dsa_chip_data *pd = ds->pd; | |
f9bf5a2c | 219 | bool valid_name_found = false; |
df197195 FF |
220 | int index = ds->index; |
221 | int i, ret; | |
91da11f8 LB |
222 | |
223 | /* | |
224 | * Validate supplied switch configuration. | |
225 | */ | |
91da11f8 LB |
226 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
227 | char *name; | |
228 | ||
229 | name = pd->port_names[i]; | |
230 | if (name == NULL) | |
231 | continue; | |
232 | ||
233 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 234 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
235 | netdev_err(dst->master_netdev, |
236 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
237 | ret = -EINVAL; |
238 | goto out; | |
239 | } | |
e84665c9 LB |
240 | dst->cpu_switch = index; |
241 | dst->cpu_port = i; | |
242 | } else if (!strcmp(name, "dsa")) { | |
243 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 244 | } else { |
e84665c9 | 245 | ds->phys_port_mask |= 1 << i; |
91da11f8 | 246 | } |
f9bf5a2c | 247 | valid_name_found = true; |
91da11f8 LB |
248 | } |
249 | ||
f9bf5a2c FF |
250 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
251 | ret = -EINVAL; | |
252 | goto out; | |
253 | } | |
91da11f8 | 254 | |
0d8bcdd3 FF |
255 | /* Make the built-in MII bus mask match the number of ports, |
256 | * switch drivers can override this later | |
257 | */ | |
258 | ds->phys_mii_mask = ds->phys_port_mask; | |
259 | ||
91da11f8 | 260 | /* |
e84665c9 LB |
261 | * If the CPU connects to this switch, set the switch tree |
262 | * tagging protocol to the preferred tagging format of this | |
263 | * switch. | |
91da11f8 | 264 | */ |
5075314e | 265 | if (dst->cpu_switch == index) { |
59299031 | 266 | switch (ds->tag_protocol) { |
5075314e AD |
267 | #ifdef CONFIG_NET_DSA_TAG_DSA |
268 | case DSA_TAG_PROTO_DSA: | |
269 | dst->rcv = dsa_netdev_ops.rcv; | |
270 | break; | |
271 | #endif | |
272 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
273 | case DSA_TAG_PROTO_EDSA: | |
274 | dst->rcv = edsa_netdev_ops.rcv; | |
275 | break; | |
276 | #endif | |
277 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
278 | case DSA_TAG_PROTO_TRAILER: | |
279 | dst->rcv = trailer_netdev_ops.rcv; | |
280 | break; | |
281 | #endif | |
282 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
283 | case DSA_TAG_PROTO_BRCM: | |
284 | dst->rcv = brcm_netdev_ops.rcv; | |
285 | break; | |
286 | #endif | |
ae439286 | 287 | case DSA_TAG_PROTO_NONE: |
5075314e | 288 | break; |
ae439286 AL |
289 | default: |
290 | ret = -ENOPROTOOPT; | |
291 | goto out; | |
5075314e | 292 | } |
91da11f8 | 293 | |
59299031 | 294 | dst->tag_protocol = ds->tag_protocol; |
5075314e | 295 | } |
91da11f8 LB |
296 | |
297 | /* | |
298 | * Do basic register setup. | |
299 | */ | |
300 | ret = drv->setup(ds); | |
301 | if (ret < 0) | |
302 | goto out; | |
303 | ||
e84665c9 | 304 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
305 | if (ret < 0) |
306 | goto out; | |
307 | ||
308 | ds->slave_mii_bus = mdiobus_alloc(); | |
309 | if (ds->slave_mii_bus == NULL) { | |
310 | ret = -ENOMEM; | |
311 | goto out; | |
312 | } | |
313 | dsa_slave_mii_bus_init(ds); | |
314 | ||
315 | ret = mdiobus_register(ds->slave_mii_bus); | |
316 | if (ret < 0) | |
317 | goto out_free; | |
318 | ||
319 | ||
320 | /* | |
321 | * Create network devices for physical switch ports. | |
322 | */ | |
91da11f8 | 323 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
e84665c9 | 324 | if (!(ds->phys_port_mask & (1 << i))) |
91da11f8 LB |
325 | continue; |
326 | ||
d87d6f44 GR |
327 | ret = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
328 | if (ret < 0) { | |
a2ae6007 JP |
329 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s)\n", |
330 | index, i, pd->port_names[i]); | |
d87d6f44 | 331 | ret = 0; |
91da11f8 | 332 | } |
91da11f8 LB |
333 | } |
334 | ||
39b0c705 AL |
335 | /* Perform configuration of the CPU and DSA ports */ |
336 | ret = dsa_cpu_dsa_setup(ds, dst->master_netdev); | |
337 | if (ret < 0) { | |
338 | netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n", | |
339 | index); | |
340 | ret = 0; | |
341 | } | |
342 | ||
51579c3f GR |
343 | #ifdef CONFIG_NET_DSA_HWMON |
344 | /* If the switch provides a temperature sensor, | |
345 | * register with hardware monitoring subsystem. | |
346 | * Treat registration error as non-fatal and ignore it. | |
347 | */ | |
348 | if (drv->get_temp) { | |
349 | const char *netname = netdev_name(dst->master_netdev); | |
350 | char hname[IFNAMSIZ + 1]; | |
351 | int i, j; | |
352 | ||
353 | /* Create valid hwmon 'name' attribute */ | |
354 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
355 | if (isalnum(netname[i])) | |
356 | hname[j++] = netname[i]; | |
357 | } | |
358 | hname[j] = '\0'; | |
359 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
360 | hname, index); | |
361 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
362 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
363 | if (IS_ERR(ds->hwmon_dev)) | |
364 | ds->hwmon_dev = NULL; | |
365 | } | |
366 | #endif /* CONFIG_NET_DSA_HWMON */ | |
367 | ||
df197195 | 368 | return ret; |
91da11f8 LB |
369 | |
370 | out_free: | |
371 | mdiobus_free(ds->slave_mii_bus); | |
372 | out: | |
91da11f8 | 373 | kfree(ds); |
df197195 FF |
374 | return ret; |
375 | } | |
376 | ||
377 | static struct dsa_switch * | |
378 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
379 | struct device *parent, struct device *host_dev) | |
380 | { | |
381 | struct dsa_chip_data *pd = dst->pd->chip + index; | |
382 | struct dsa_switch_driver *drv; | |
383 | struct dsa_switch *ds; | |
384 | int ret; | |
385 | char *name; | |
386 | ||
387 | /* | |
388 | * Probe for switch model. | |
389 | */ | |
390 | drv = dsa_switch_probe(host_dev, pd->sw_addr, &name); | |
391 | if (drv == NULL) { | |
392 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", | |
393 | index); | |
394 | return ERR_PTR(-EINVAL); | |
395 | } | |
396 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
397 | index, name); | |
398 | ||
399 | ||
400 | /* | |
401 | * Allocate and initialise switch state. | |
402 | */ | |
403 | ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL); | |
404 | if (ds == NULL) | |
24595346 | 405 | return ERR_PTR(-ENOMEM); |
df197195 FF |
406 | |
407 | ds->dst = dst; | |
408 | ds->index = index; | |
409 | ds->pd = pd; | |
410 | ds->drv = drv; | |
59299031 | 411 | ds->tag_protocol = drv->tag_protocol; |
df197195 FF |
412 | ds->master_dev = host_dev; |
413 | ||
414 | ret = dsa_switch_setup_one(ds, parent); | |
415 | if (ret) | |
24595346 | 416 | return ERR_PTR(ret); |
df197195 FF |
417 | |
418 | return ds; | |
91da11f8 LB |
419 | } |
420 | ||
421 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
422 | { | |
51579c3f GR |
423 | #ifdef CONFIG_NET_DSA_HWMON |
424 | if (ds->hwmon_dev) | |
425 | hwmon_device_unregister(ds->hwmon_dev); | |
426 | #endif | |
91da11f8 LB |
427 | } |
428 | ||
e506d405 | 429 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
430 | static int dsa_switch_suspend(struct dsa_switch *ds) |
431 | { | |
432 | int i, ret = 0; | |
433 | ||
434 | /* Suspend slave network devices */ | |
435 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 436 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
437 | continue; |
438 | ||
439 | ret = dsa_slave_suspend(ds->ports[i]); | |
440 | if (ret) | |
441 | return ret; | |
442 | } | |
443 | ||
444 | if (ds->drv->suspend) | |
445 | ret = ds->drv->suspend(ds); | |
446 | ||
447 | return ret; | |
448 | } | |
449 | ||
450 | static int dsa_switch_resume(struct dsa_switch *ds) | |
451 | { | |
452 | int i, ret = 0; | |
453 | ||
454 | if (ds->drv->resume) | |
455 | ret = ds->drv->resume(ds); | |
456 | ||
457 | if (ret) | |
458 | return ret; | |
459 | ||
460 | /* Resume slave network devices */ | |
461 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 462 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
463 | continue; |
464 | ||
465 | ret = dsa_slave_resume(ds->ports[i]); | |
466 | if (ret) | |
467 | return ret; | |
468 | } | |
469 | ||
470 | return 0; | |
471 | } | |
e506d405 | 472 | #endif |
24462549 | 473 | |
91da11f8 LB |
474 | |
475 | /* link polling *************************************************************/ | |
476 | static void dsa_link_poll_work(struct work_struct *ugly) | |
477 | { | |
e84665c9 LB |
478 | struct dsa_switch_tree *dst; |
479 | int i; | |
480 | ||
481 | dst = container_of(ugly, struct dsa_switch_tree, link_poll_work); | |
91da11f8 | 482 | |
e84665c9 LB |
483 | for (i = 0; i < dst->pd->nr_chips; i++) { |
484 | struct dsa_switch *ds = dst->ds[i]; | |
91da11f8 | 485 | |
e84665c9 LB |
486 | if (ds != NULL && ds->drv->poll_link != NULL) |
487 | ds->drv->poll_link(ds); | |
488 | } | |
489 | ||
490 | mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ)); | |
91da11f8 LB |
491 | } |
492 | ||
e84665c9 | 493 | static void dsa_link_poll_timer(unsigned long _dst) |
91da11f8 | 494 | { |
e84665c9 | 495 | struct dsa_switch_tree *dst = (void *)_dst; |
91da11f8 | 496 | |
e84665c9 | 497 | schedule_work(&dst->link_poll_work); |
91da11f8 LB |
498 | } |
499 | ||
500 | ||
501 | /* platform driver init and cleanup *****************************************/ | |
502 | static int dev_is_class(struct device *dev, void *class) | |
503 | { | |
504 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
505 | return 1; | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
510 | static struct device *dev_find_class(struct device *parent, char *class) | |
511 | { | |
512 | if (dev_is_class(parent, class)) { | |
513 | get_device(parent); | |
514 | return parent; | |
515 | } | |
516 | ||
517 | return device_find_child(parent, class, dev_is_class); | |
518 | } | |
519 | ||
b4d2394d | 520 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
521 | { |
522 | struct device *d; | |
523 | ||
524 | d = dev_find_class(dev, "mdio_bus"); | |
525 | if (d != NULL) { | |
526 | struct mii_bus *bus; | |
527 | ||
528 | bus = to_mii_bus(d); | |
529 | put_device(d); | |
530 | ||
531 | return bus; | |
532 | } | |
533 | ||
534 | return NULL; | |
535 | } | |
b4d2394d | 536 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
537 | |
538 | static struct net_device *dev_to_net_device(struct device *dev) | |
539 | { | |
540 | struct device *d; | |
541 | ||
542 | d = dev_find_class(dev, "net"); | |
543 | if (d != NULL) { | |
544 | struct net_device *nd; | |
545 | ||
546 | nd = to_net_dev(d); | |
547 | dev_hold(nd); | |
548 | put_device(d); | |
549 | ||
550 | return nd; | |
551 | } | |
552 | ||
553 | return NULL; | |
554 | } | |
555 | ||
5e95329b FF |
556 | #ifdef CONFIG_OF |
557 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
558 | struct dsa_chip_data *cd, | |
30303813 | 559 | int chip_index, int port_index, |
5e95329b FF |
560 | struct device_node *link) |
561 | { | |
5e95329b | 562 | const __be32 *reg; |
5e95329b FF |
563 | int link_sw_addr; |
564 | struct device_node *parent_sw; | |
565 | int len; | |
566 | ||
567 | parent_sw = of_get_parent(link); | |
568 | if (!parent_sw) | |
569 | return -EINVAL; | |
570 | ||
571 | reg = of_get_property(parent_sw, "reg", &len); | |
572 | if (!reg || (len != sizeof(*reg) * 2)) | |
573 | return -EINVAL; | |
574 | ||
30303813 PN |
575 | /* |
576 | * Get the destination switch number from the second field of its 'reg' | |
577 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
578 | */ | |
5e95329b FF |
579 | link_sw_addr = be32_to_cpup(reg + 1); |
580 | ||
581 | if (link_sw_addr >= pd->nr_chips) | |
582 | return -EINVAL; | |
583 | ||
584 | /* First time routing table allocation */ | |
585 | if (!cd->rtable) { | |
5bc4b46a FF |
586 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
587 | GFP_KERNEL); | |
5e95329b FF |
588 | if (!cd->rtable) |
589 | return -ENOMEM; | |
590 | ||
591 | /* default to no valid uplink/downlink */ | |
592 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
593 | } | |
594 | ||
30303813 | 595 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
596 | |
597 | return 0; | |
5e95329b FF |
598 | } |
599 | ||
1e72e6f8 AL |
600 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
601 | struct dsa_chip_data *cd, | |
602 | int chip_index, int port_index, | |
603 | struct device_node *port, | |
604 | const char *port_name) | |
605 | { | |
606 | struct device_node *link; | |
607 | int link_index; | |
608 | int ret; | |
609 | ||
610 | for (link_index = 0;; link_index++) { | |
611 | link = of_parse_phandle(port, "link", link_index); | |
612 | if (!link) | |
613 | break; | |
614 | ||
615 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
616 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
617 | port_index, link); | |
618 | if (ret) | |
619 | return ret; | |
620 | } | |
621 | } | |
622 | return 0; | |
623 | } | |
624 | ||
21168245 FF |
625 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
626 | { | |
627 | int i; | |
628 | int port_index; | |
629 | ||
630 | for (i = 0; i < pd->nr_chips; i++) { | |
631 | port_index = 0; | |
5f64a7db | 632 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 633 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
634 | port_index++; |
635 | } | |
21168245 | 636 | kfree(pd->chip[i].rtable); |
e496ae69 RK |
637 | |
638 | /* Drop our reference to the MDIO bus device */ | |
639 | if (pd->chip[i].host_dev) | |
640 | put_device(pd->chip[i].host_dev); | |
21168245 FF |
641 | } |
642 | kfree(pd->chip); | |
643 | } | |
644 | ||
f1a26a06 | 645 | static int dsa_of_probe(struct device *dev) |
5e95329b | 646 | { |
f1a26a06 | 647 | struct device_node *np = dev->of_node; |
1e72e6f8 | 648 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 649 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 650 | struct net_device *ethernet_dev; |
5e95329b FF |
651 | struct dsa_platform_data *pd; |
652 | struct dsa_chip_data *cd; | |
653 | const char *port_name; | |
654 | int chip_index, port_index; | |
655 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 656 | u32 eeprom_len; |
21168245 | 657 | int ret; |
5e95329b FF |
658 | |
659 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
660 | if (!mdio) | |
661 | return -EINVAL; | |
662 | ||
663 | mdio_bus = of_mdio_find_bus(mdio); | |
664 | if (!mdio_bus) | |
b324c07a | 665 | return -EPROBE_DEFER; |
5e95329b FF |
666 | |
667 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
e496ae69 RK |
668 | if (!ethernet) { |
669 | ret = -EINVAL; | |
670 | goto out_put_mdio; | |
671 | } | |
5e95329b | 672 | |
769a0202 | 673 | ethernet_dev = of_find_net_device_by_node(ethernet); |
e496ae69 RK |
674 | if (!ethernet_dev) { |
675 | ret = -EPROBE_DEFER; | |
676 | goto out_put_mdio; | |
677 | } | |
5e95329b FF |
678 | |
679 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
e496ae69 RK |
680 | if (!pd) { |
681 | ret = -ENOMEM; | |
9861f720 | 682 | goto out_put_ethernet; |
e496ae69 | 683 | } |
5e95329b | 684 | |
f1a26a06 | 685 | dev->platform_data = pd; |
769a0202 | 686 | pd->of_netdev = ethernet_dev; |
e04449fc | 687 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
688 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
689 | pd->nr_chips = DSA_MAX_SWITCHES; | |
690 | ||
6f2aed6a FF |
691 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
692 | GFP_KERNEL); | |
5e95329b FF |
693 | if (!pd->chip) { |
694 | ret = -ENOMEM; | |
695 | goto out_free; | |
696 | } | |
697 | ||
d1c0b471 | 698 | chip_index = -1; |
5e95329b | 699 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 700 | chip_index++; |
5e95329b FF |
701 | cd = &pd->chip[chip_index]; |
702 | ||
fa981d9a | 703 | cd->of_node = child; |
e496ae69 RK |
704 | |
705 | /* When assigning the host device, increment its refcount */ | |
706 | cd->host_dev = get_device(&mdio_bus->dev); | |
5e95329b FF |
707 | |
708 | sw_addr = of_get_property(child, "reg", NULL); | |
709 | if (!sw_addr) | |
710 | continue; | |
711 | ||
712 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 713 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
714 | continue; |
715 | ||
50d4964f | 716 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
717 | cd->eeprom_len = eeprom_len; |
718 | ||
6bc6d0a8 AL |
719 | mdio = of_parse_phandle(child, "mii-bus", 0); |
720 | if (mdio) { | |
721 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
722 | if (!mdio_bus_switch) { | |
723 | ret = -EPROBE_DEFER; | |
724 | goto out_free_chip; | |
725 | } | |
e496ae69 RK |
726 | |
727 | /* Drop the mdio_bus device ref, replacing the host | |
728 | * device with the mdio_bus_switch device, keeping | |
729 | * the refcount from of_mdio_find_bus() above. | |
730 | */ | |
731 | put_device(cd->host_dev); | |
6bc6d0a8 AL |
732 | cd->host_dev = &mdio_bus_switch->dev; |
733 | } | |
734 | ||
5e95329b FF |
735 | for_each_available_child_of_node(child, port) { |
736 | port_reg = of_get_property(port, "reg", NULL); | |
737 | if (!port_reg) | |
738 | continue; | |
739 | ||
740 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
741 | if (port_index >= DSA_MAX_PORTS) |
742 | break; | |
5e95329b FF |
743 | |
744 | port_name = of_get_property(port, "label", NULL); | |
745 | if (!port_name) | |
746 | continue; | |
747 | ||
bd47497a FF |
748 | cd->port_dn[port_index] = port; |
749 | ||
5e95329b FF |
750 | cd->port_names[port_index] = kstrdup(port_name, |
751 | GFP_KERNEL); | |
752 | if (!cd->port_names[port_index]) { | |
753 | ret = -ENOMEM; | |
754 | goto out_free_chip; | |
755 | } | |
756 | ||
1e72e6f8 AL |
757 | ret = dsa_of_probe_links(pd, cd, chip_index, |
758 | port_index, port, port_name); | |
759 | if (ret) | |
760 | goto out_free_chip; | |
5e95329b | 761 | |
5e95329b FF |
762 | } |
763 | } | |
764 | ||
e496ae69 RK |
765 | /* The individual chips hold their own refcount on the mdio bus, |
766 | * so drop ours */ | |
767 | put_device(&mdio_bus->dev); | |
768 | ||
5e95329b FF |
769 | return 0; |
770 | ||
771 | out_free_chip: | |
21168245 | 772 | dsa_of_free_platform_data(pd); |
5e95329b FF |
773 | out_free: |
774 | kfree(pd); | |
f1a26a06 | 775 | dev->platform_data = NULL; |
9861f720 RK |
776 | out_put_ethernet: |
777 | put_device(ðernet_dev->dev); | |
e496ae69 RK |
778 | out_put_mdio: |
779 | put_device(&mdio_bus->dev); | |
5e95329b FF |
780 | return ret; |
781 | } | |
782 | ||
f1a26a06 | 783 | static void dsa_of_remove(struct device *dev) |
5e95329b | 784 | { |
f1a26a06 | 785 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 786 | |
f1a26a06 | 787 | if (!dev->of_node) |
5e95329b FF |
788 | return; |
789 | ||
21168245 | 790 | dsa_of_free_platform_data(pd); |
9861f720 | 791 | put_device(&pd->of_netdev->dev); |
5e95329b FF |
792 | kfree(pd); |
793 | } | |
794 | #else | |
f1a26a06 | 795 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
796 | { |
797 | return 0; | |
798 | } | |
799 | ||
f1a26a06 | 800 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
801 | { |
802 | } | |
803 | #endif | |
804 | ||
c86e59b9 FF |
805 | static void dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
806 | struct device *parent, struct dsa_platform_data *pd) | |
807 | { | |
808 | int i; | |
809 | ||
810 | dst->pd = pd; | |
811 | dst->master_netdev = dev; | |
812 | dst->cpu_switch = -1; | |
813 | dst->cpu_port = -1; | |
814 | ||
815 | for (i = 0; i < pd->nr_chips; i++) { | |
816 | struct dsa_switch *ds; | |
817 | ||
818 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
819 | if (IS_ERR(ds)) { | |
820 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
821 | i, PTR_ERR(ds)); | |
822 | continue; | |
823 | } | |
824 | ||
825 | dst->ds[i] = ds; | |
826 | if (ds->drv->poll_link != NULL) | |
827 | dst->link_poll_needed = 1; | |
828 | } | |
829 | ||
830 | /* | |
831 | * If we use a tagging format that doesn't have an ethertype | |
832 | * field, make sure that all packets from this point on get | |
833 | * sent to the tag format's receive function. | |
834 | */ | |
835 | wmb(); | |
836 | dev->dsa_ptr = (void *)dst; | |
837 | ||
838 | if (dst->link_poll_needed) { | |
839 | INIT_WORK(&dst->link_poll_work, dsa_link_poll_work); | |
840 | init_timer(&dst->link_poll_timer); | |
841 | dst->link_poll_timer.data = (unsigned long)dst; | |
842 | dst->link_poll_timer.function = dsa_link_poll_timer; | |
843 | dst->link_poll_timer.expires = round_jiffies(jiffies + HZ); | |
844 | add_timer(&dst->link_poll_timer); | |
845 | } | |
846 | } | |
847 | ||
91da11f8 LB |
848 | static int dsa_probe(struct platform_device *pdev) |
849 | { | |
91da11f8 LB |
850 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
851 | struct net_device *dev; | |
e84665c9 | 852 | struct dsa_switch_tree *dst; |
c86e59b9 | 853 | int ret; |
91da11f8 | 854 | |
a2ae6007 JP |
855 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
856 | dsa_driver_version); | |
91da11f8 | 857 | |
5e95329b | 858 | if (pdev->dev.of_node) { |
f1a26a06 | 859 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
860 | if (ret) |
861 | return ret; | |
862 | ||
863 | pd = pdev->dev.platform_data; | |
864 | } | |
865 | ||
769a0202 | 866 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
867 | return -EINVAL; |
868 | ||
769a0202 FF |
869 | if (pd->of_netdev) { |
870 | dev = pd->of_netdev; | |
871 | dev_hold(dev); | |
872 | } else { | |
873 | dev = dev_to_net_device(pd->netdev); | |
874 | } | |
5e95329b | 875 | if (dev == NULL) { |
b324c07a | 876 | ret = -EPROBE_DEFER; |
5e95329b FF |
877 | goto out; |
878 | } | |
91da11f8 LB |
879 | |
880 | if (dev->dsa_ptr != NULL) { | |
881 | dev_put(dev); | |
5e95329b FF |
882 | ret = -EEXIST; |
883 | goto out; | |
91da11f8 LB |
884 | } |
885 | ||
e84665c9 LB |
886 | dst = kzalloc(sizeof(*dst), GFP_KERNEL); |
887 | if (dst == NULL) { | |
91da11f8 | 888 | dev_put(dev); |
5e95329b FF |
889 | ret = -ENOMEM; |
890 | goto out; | |
91da11f8 LB |
891 | } |
892 | ||
e84665c9 LB |
893 | platform_set_drvdata(pdev, dst); |
894 | ||
c86e59b9 | 895 | dsa_setup_dst(dst, dev, &pdev->dev, pd); |
91da11f8 LB |
896 | |
897 | return 0; | |
5e95329b FF |
898 | |
899 | out: | |
f1a26a06 | 900 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
901 | |
902 | return ret; | |
91da11f8 LB |
903 | } |
904 | ||
c86e59b9 | 905 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 906 | { |
e84665c9 | 907 | int i; |
91da11f8 | 908 | |
e84665c9 LB |
909 | if (dst->link_poll_needed) |
910 | del_timer_sync(&dst->link_poll_timer); | |
91da11f8 | 911 | |
43829731 | 912 | flush_work(&dst->link_poll_work); |
91da11f8 | 913 | |
e84665c9 LB |
914 | for (i = 0; i < dst->pd->nr_chips; i++) { |
915 | struct dsa_switch *ds = dst->ds[i]; | |
916 | ||
917 | if (ds != NULL) | |
918 | dsa_switch_destroy(ds); | |
919 | } | |
c86e59b9 FF |
920 | } |
921 | ||
922 | static int dsa_remove(struct platform_device *pdev) | |
923 | { | |
924 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 925 | |
c86e59b9 | 926 | dsa_remove_dst(dst); |
f1a26a06 | 927 | dsa_of_remove(&pdev->dev); |
5e95329b | 928 | |
91da11f8 LB |
929 | return 0; |
930 | } | |
931 | ||
932 | static void dsa_shutdown(struct platform_device *pdev) | |
933 | { | |
934 | } | |
935 | ||
3e8a72d1 FF |
936 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
937 | struct packet_type *pt, struct net_device *orig_dev) | |
938 | { | |
939 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
940 | ||
941 | if (unlikely(dst == NULL)) { | |
942 | kfree_skb(skb); | |
943 | return 0; | |
944 | } | |
945 | ||
5075314e | 946 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
947 | } |
948 | ||
61b7363f | 949 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
950 | .type = cpu_to_be16(ETH_P_XDSA), |
951 | .func = dsa_switch_rcv, | |
952 | }; | |
953 | ||
b73adef6 FF |
954 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
955 | .notifier_call = dsa_slave_netdevice_event, | |
956 | }; | |
957 | ||
24462549 FF |
958 | #ifdef CONFIG_PM_SLEEP |
959 | static int dsa_suspend(struct device *d) | |
960 | { | |
961 | struct platform_device *pdev = to_platform_device(d); | |
962 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
963 | int i, ret = 0; | |
964 | ||
965 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
966 | struct dsa_switch *ds = dst->ds[i]; | |
967 | ||
968 | if (ds != NULL) | |
969 | ret = dsa_switch_suspend(ds); | |
970 | } | |
971 | ||
972 | return ret; | |
973 | } | |
974 | ||
975 | static int dsa_resume(struct device *d) | |
976 | { | |
977 | struct platform_device *pdev = to_platform_device(d); | |
978 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
979 | int i, ret = 0; | |
980 | ||
981 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
982 | struct dsa_switch *ds = dst->ds[i]; | |
983 | ||
984 | if (ds != NULL) | |
985 | ret = dsa_switch_resume(ds); | |
986 | } | |
987 | ||
988 | return ret; | |
989 | } | |
990 | #endif | |
991 | ||
992 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
993 | ||
5e95329b | 994 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 995 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
996 | { .compatible = "marvell,dsa", }, |
997 | {} | |
998 | }; | |
999 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
1000 | ||
91da11f8 LB |
1001 | static struct platform_driver dsa_driver = { |
1002 | .probe = dsa_probe, | |
1003 | .remove = dsa_remove, | |
1004 | .shutdown = dsa_shutdown, | |
1005 | .driver = { | |
1006 | .name = "dsa", | |
5e95329b | 1007 | .of_match_table = dsa_of_match_table, |
24462549 | 1008 | .pm = &dsa_pm_ops, |
91da11f8 LB |
1009 | }, |
1010 | }; | |
1011 | ||
1012 | static int __init dsa_init_module(void) | |
1013 | { | |
7df899c3 BH |
1014 | int rc; |
1015 | ||
b73adef6 FF |
1016 | register_netdevice_notifier(&dsa_netdevice_nb); |
1017 | ||
7df899c3 BH |
1018 | rc = platform_driver_register(&dsa_driver); |
1019 | if (rc) | |
1020 | return rc; | |
1021 | ||
3e8a72d1 FF |
1022 | dev_add_pack(&dsa_pack_type); |
1023 | ||
7df899c3 | 1024 | return 0; |
91da11f8 LB |
1025 | } |
1026 | module_init(dsa_init_module); | |
1027 | ||
1028 | static void __exit dsa_cleanup_module(void) | |
1029 | { | |
b73adef6 | 1030 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 1031 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
1032 | platform_driver_unregister(&dsa_driver); |
1033 | } | |
1034 | module_exit(dsa_cleanup_module); | |
1035 | ||
577d6a7c | 1036 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
1037 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
1038 | MODULE_LICENSE("GPL"); | |
1039 | MODULE_ALIAS("platform:dsa"); |