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 **************************************************/ | |
df197195 | 179 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 180 | { |
df197195 FF |
181 | struct dsa_switch_driver *drv = ds->drv; |
182 | struct dsa_switch_tree *dst = ds->dst; | |
183 | struct dsa_chip_data *pd = ds->pd; | |
f9bf5a2c | 184 | bool valid_name_found = false; |
df197195 FF |
185 | int index = ds->index; |
186 | int i, ret; | |
91da11f8 LB |
187 | |
188 | /* | |
189 | * Validate supplied switch configuration. | |
190 | */ | |
91da11f8 LB |
191 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
192 | char *name; | |
193 | ||
194 | name = pd->port_names[i]; | |
195 | if (name == NULL) | |
196 | continue; | |
197 | ||
198 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 199 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
200 | netdev_err(dst->master_netdev, |
201 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
202 | ret = -EINVAL; |
203 | goto out; | |
204 | } | |
e84665c9 LB |
205 | dst->cpu_switch = index; |
206 | dst->cpu_port = i; | |
207 | } else if (!strcmp(name, "dsa")) { | |
208 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 209 | } else { |
e84665c9 | 210 | ds->phys_port_mask |= 1 << i; |
91da11f8 | 211 | } |
f9bf5a2c | 212 | valid_name_found = true; |
91da11f8 LB |
213 | } |
214 | ||
f9bf5a2c FF |
215 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
216 | ret = -EINVAL; | |
217 | goto out; | |
218 | } | |
91da11f8 | 219 | |
0d8bcdd3 FF |
220 | /* Make the built-in MII bus mask match the number of ports, |
221 | * switch drivers can override this later | |
222 | */ | |
223 | ds->phys_mii_mask = ds->phys_port_mask; | |
224 | ||
91da11f8 | 225 | /* |
e84665c9 LB |
226 | * If the CPU connects to this switch, set the switch tree |
227 | * tagging protocol to the preferred tagging format of this | |
228 | * switch. | |
91da11f8 | 229 | */ |
5075314e | 230 | if (dst->cpu_switch == index) { |
59299031 | 231 | switch (ds->tag_protocol) { |
5075314e AD |
232 | #ifdef CONFIG_NET_DSA_TAG_DSA |
233 | case DSA_TAG_PROTO_DSA: | |
234 | dst->rcv = dsa_netdev_ops.rcv; | |
235 | break; | |
236 | #endif | |
237 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
238 | case DSA_TAG_PROTO_EDSA: | |
239 | dst->rcv = edsa_netdev_ops.rcv; | |
240 | break; | |
241 | #endif | |
242 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
243 | case DSA_TAG_PROTO_TRAILER: | |
244 | dst->rcv = trailer_netdev_ops.rcv; | |
245 | break; | |
246 | #endif | |
247 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
248 | case DSA_TAG_PROTO_BRCM: | |
249 | dst->rcv = brcm_netdev_ops.rcv; | |
250 | break; | |
251 | #endif | |
ae439286 | 252 | case DSA_TAG_PROTO_NONE: |
5075314e | 253 | break; |
ae439286 AL |
254 | default: |
255 | ret = -ENOPROTOOPT; | |
256 | goto out; | |
5075314e | 257 | } |
91da11f8 | 258 | |
59299031 | 259 | dst->tag_protocol = ds->tag_protocol; |
5075314e | 260 | } |
91da11f8 LB |
261 | |
262 | /* | |
263 | * Do basic register setup. | |
264 | */ | |
265 | ret = drv->setup(ds); | |
266 | if (ret < 0) | |
267 | goto out; | |
268 | ||
e84665c9 | 269 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
270 | if (ret < 0) |
271 | goto out; | |
272 | ||
273 | ds->slave_mii_bus = mdiobus_alloc(); | |
274 | if (ds->slave_mii_bus == NULL) { | |
275 | ret = -ENOMEM; | |
276 | goto out; | |
277 | } | |
278 | dsa_slave_mii_bus_init(ds); | |
279 | ||
280 | ret = mdiobus_register(ds->slave_mii_bus); | |
281 | if (ret < 0) | |
282 | goto out_free; | |
283 | ||
284 | ||
285 | /* | |
286 | * Create network devices for physical switch ports. | |
287 | */ | |
91da11f8 | 288 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
e84665c9 | 289 | if (!(ds->phys_port_mask & (1 << i))) |
91da11f8 LB |
290 | continue; |
291 | ||
d87d6f44 GR |
292 | ret = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
293 | if (ret < 0) { | |
a2ae6007 JP |
294 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s)\n", |
295 | index, i, pd->port_names[i]); | |
d87d6f44 | 296 | ret = 0; |
91da11f8 | 297 | } |
91da11f8 LB |
298 | } |
299 | ||
51579c3f GR |
300 | #ifdef CONFIG_NET_DSA_HWMON |
301 | /* If the switch provides a temperature sensor, | |
302 | * register with hardware monitoring subsystem. | |
303 | * Treat registration error as non-fatal and ignore it. | |
304 | */ | |
305 | if (drv->get_temp) { | |
306 | const char *netname = netdev_name(dst->master_netdev); | |
307 | char hname[IFNAMSIZ + 1]; | |
308 | int i, j; | |
309 | ||
310 | /* Create valid hwmon 'name' attribute */ | |
311 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
312 | if (isalnum(netname[i])) | |
313 | hname[j++] = netname[i]; | |
314 | } | |
315 | hname[j] = '\0'; | |
316 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
317 | hname, index); | |
318 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
319 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
320 | if (IS_ERR(ds->hwmon_dev)) | |
321 | ds->hwmon_dev = NULL; | |
322 | } | |
323 | #endif /* CONFIG_NET_DSA_HWMON */ | |
324 | ||
df197195 | 325 | return ret; |
91da11f8 LB |
326 | |
327 | out_free: | |
328 | mdiobus_free(ds->slave_mii_bus); | |
329 | out: | |
91da11f8 | 330 | kfree(ds); |
df197195 FF |
331 | return ret; |
332 | } | |
333 | ||
334 | static struct dsa_switch * | |
335 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
336 | struct device *parent, struct device *host_dev) | |
337 | { | |
338 | struct dsa_chip_data *pd = dst->pd->chip + index; | |
339 | struct dsa_switch_driver *drv; | |
340 | struct dsa_switch *ds; | |
341 | int ret; | |
342 | char *name; | |
343 | ||
344 | /* | |
345 | * Probe for switch model. | |
346 | */ | |
347 | drv = dsa_switch_probe(host_dev, pd->sw_addr, &name); | |
348 | if (drv == NULL) { | |
349 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", | |
350 | index); | |
351 | return ERR_PTR(-EINVAL); | |
352 | } | |
353 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
354 | index, name); | |
355 | ||
356 | ||
357 | /* | |
358 | * Allocate and initialise switch state. | |
359 | */ | |
360 | ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL); | |
361 | if (ds == NULL) | |
362 | return NULL; | |
363 | ||
364 | ds->dst = dst; | |
365 | ds->index = index; | |
366 | ds->pd = pd; | |
367 | ds->drv = drv; | |
59299031 | 368 | ds->tag_protocol = drv->tag_protocol; |
df197195 FF |
369 | ds->master_dev = host_dev; |
370 | ||
371 | ret = dsa_switch_setup_one(ds, parent); | |
372 | if (ret) | |
373 | return NULL; | |
374 | ||
375 | return ds; | |
91da11f8 LB |
376 | } |
377 | ||
378 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
379 | { | |
51579c3f GR |
380 | #ifdef CONFIG_NET_DSA_HWMON |
381 | if (ds->hwmon_dev) | |
382 | hwmon_device_unregister(ds->hwmon_dev); | |
383 | #endif | |
91da11f8 LB |
384 | } |
385 | ||
e506d405 | 386 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
387 | static int dsa_switch_suspend(struct dsa_switch *ds) |
388 | { | |
389 | int i, ret = 0; | |
390 | ||
391 | /* Suspend slave network devices */ | |
392 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 393 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
394 | continue; |
395 | ||
396 | ret = dsa_slave_suspend(ds->ports[i]); | |
397 | if (ret) | |
398 | return ret; | |
399 | } | |
400 | ||
401 | if (ds->drv->suspend) | |
402 | ret = ds->drv->suspend(ds); | |
403 | ||
404 | return ret; | |
405 | } | |
406 | ||
407 | static int dsa_switch_resume(struct dsa_switch *ds) | |
408 | { | |
409 | int i, ret = 0; | |
410 | ||
411 | if (ds->drv->resume) | |
412 | ret = ds->drv->resume(ds); | |
413 | ||
414 | if (ret) | |
415 | return ret; | |
416 | ||
417 | /* Resume slave network devices */ | |
418 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 419 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
420 | continue; |
421 | ||
422 | ret = dsa_slave_resume(ds->ports[i]); | |
423 | if (ret) | |
424 | return ret; | |
425 | } | |
426 | ||
427 | return 0; | |
428 | } | |
e506d405 | 429 | #endif |
24462549 | 430 | |
91da11f8 LB |
431 | |
432 | /* link polling *************************************************************/ | |
433 | static void dsa_link_poll_work(struct work_struct *ugly) | |
434 | { | |
e84665c9 LB |
435 | struct dsa_switch_tree *dst; |
436 | int i; | |
437 | ||
438 | dst = container_of(ugly, struct dsa_switch_tree, link_poll_work); | |
91da11f8 | 439 | |
e84665c9 LB |
440 | for (i = 0; i < dst->pd->nr_chips; i++) { |
441 | struct dsa_switch *ds = dst->ds[i]; | |
91da11f8 | 442 | |
e84665c9 LB |
443 | if (ds != NULL && ds->drv->poll_link != NULL) |
444 | ds->drv->poll_link(ds); | |
445 | } | |
446 | ||
447 | mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ)); | |
91da11f8 LB |
448 | } |
449 | ||
e84665c9 | 450 | static void dsa_link_poll_timer(unsigned long _dst) |
91da11f8 | 451 | { |
e84665c9 | 452 | struct dsa_switch_tree *dst = (void *)_dst; |
91da11f8 | 453 | |
e84665c9 | 454 | schedule_work(&dst->link_poll_work); |
91da11f8 LB |
455 | } |
456 | ||
457 | ||
458 | /* platform driver init and cleanup *****************************************/ | |
459 | static int dev_is_class(struct device *dev, void *class) | |
460 | { | |
461 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
462 | return 1; | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | static struct device *dev_find_class(struct device *parent, char *class) | |
468 | { | |
469 | if (dev_is_class(parent, class)) { | |
470 | get_device(parent); | |
471 | return parent; | |
472 | } | |
473 | ||
474 | return device_find_child(parent, class, dev_is_class); | |
475 | } | |
476 | ||
b4d2394d | 477 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
478 | { |
479 | struct device *d; | |
480 | ||
481 | d = dev_find_class(dev, "mdio_bus"); | |
482 | if (d != NULL) { | |
483 | struct mii_bus *bus; | |
484 | ||
485 | bus = to_mii_bus(d); | |
486 | put_device(d); | |
487 | ||
488 | return bus; | |
489 | } | |
490 | ||
491 | return NULL; | |
492 | } | |
b4d2394d | 493 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
494 | |
495 | static struct net_device *dev_to_net_device(struct device *dev) | |
496 | { | |
497 | struct device *d; | |
498 | ||
499 | d = dev_find_class(dev, "net"); | |
500 | if (d != NULL) { | |
501 | struct net_device *nd; | |
502 | ||
503 | nd = to_net_dev(d); | |
504 | dev_hold(nd); | |
505 | put_device(d); | |
506 | ||
507 | return nd; | |
508 | } | |
509 | ||
510 | return NULL; | |
511 | } | |
512 | ||
5e95329b FF |
513 | #ifdef CONFIG_OF |
514 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
515 | struct dsa_chip_data *cd, | |
30303813 | 516 | int chip_index, int port_index, |
5e95329b FF |
517 | struct device_node *link) |
518 | { | |
5e95329b | 519 | const __be32 *reg; |
5e95329b FF |
520 | int link_sw_addr; |
521 | struct device_node *parent_sw; | |
522 | int len; | |
523 | ||
524 | parent_sw = of_get_parent(link); | |
525 | if (!parent_sw) | |
526 | return -EINVAL; | |
527 | ||
528 | reg = of_get_property(parent_sw, "reg", &len); | |
529 | if (!reg || (len != sizeof(*reg) * 2)) | |
530 | return -EINVAL; | |
531 | ||
30303813 PN |
532 | /* |
533 | * Get the destination switch number from the second field of its 'reg' | |
534 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
535 | */ | |
5e95329b FF |
536 | link_sw_addr = be32_to_cpup(reg + 1); |
537 | ||
538 | if (link_sw_addr >= pd->nr_chips) | |
539 | return -EINVAL; | |
540 | ||
541 | /* First time routing table allocation */ | |
542 | if (!cd->rtable) { | |
5bc4b46a FF |
543 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
544 | GFP_KERNEL); | |
5e95329b FF |
545 | if (!cd->rtable) |
546 | return -ENOMEM; | |
547 | ||
548 | /* default to no valid uplink/downlink */ | |
549 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
550 | } | |
551 | ||
30303813 | 552 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
553 | |
554 | return 0; | |
5e95329b FF |
555 | } |
556 | ||
21168245 FF |
557 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
558 | { | |
559 | int i; | |
560 | int port_index; | |
561 | ||
562 | for (i = 0; i < pd->nr_chips; i++) { | |
563 | port_index = 0; | |
5f64a7db | 564 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 565 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
566 | port_index++; |
567 | } | |
21168245 FF |
568 | kfree(pd->chip[i].rtable); |
569 | } | |
570 | kfree(pd->chip); | |
571 | } | |
572 | ||
f1a26a06 | 573 | static int dsa_of_probe(struct device *dev) |
5e95329b | 574 | { |
f1a26a06 | 575 | struct device_node *np = dev->of_node; |
5e95329b FF |
576 | struct device_node *child, *mdio, *ethernet, *port, *link; |
577 | struct mii_bus *mdio_bus; | |
769a0202 | 578 | struct net_device *ethernet_dev; |
5e95329b FF |
579 | struct dsa_platform_data *pd; |
580 | struct dsa_chip_data *cd; | |
581 | const char *port_name; | |
582 | int chip_index, port_index; | |
583 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 584 | u32 eeprom_len; |
21168245 | 585 | int ret; |
5e95329b FF |
586 | |
587 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
588 | if (!mdio) | |
589 | return -EINVAL; | |
590 | ||
591 | mdio_bus = of_mdio_find_bus(mdio); | |
592 | if (!mdio_bus) | |
b324c07a | 593 | return -EPROBE_DEFER; |
5e95329b FF |
594 | |
595 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
596 | if (!ethernet) | |
597 | return -EINVAL; | |
598 | ||
769a0202 | 599 | ethernet_dev = of_find_net_device_by_node(ethernet); |
5e95329b | 600 | if (!ethernet_dev) |
b324c07a | 601 | return -EPROBE_DEFER; |
5e95329b FF |
602 | |
603 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
604 | if (!pd) | |
605 | return -ENOMEM; | |
606 | ||
f1a26a06 | 607 | dev->platform_data = pd; |
769a0202 | 608 | pd->of_netdev = ethernet_dev; |
e04449fc | 609 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
610 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
611 | pd->nr_chips = DSA_MAX_SWITCHES; | |
612 | ||
6f2aed6a FF |
613 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
614 | GFP_KERNEL); | |
5e95329b FF |
615 | if (!pd->chip) { |
616 | ret = -ENOMEM; | |
617 | goto out_free; | |
618 | } | |
619 | ||
d1c0b471 | 620 | chip_index = -1; |
5e95329b | 621 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 622 | chip_index++; |
5e95329b FF |
623 | cd = &pd->chip[chip_index]; |
624 | ||
fa981d9a | 625 | cd->of_node = child; |
c1f570a6 | 626 | cd->host_dev = &mdio_bus->dev; |
5e95329b FF |
627 | |
628 | sw_addr = of_get_property(child, "reg", NULL); | |
629 | if (!sw_addr) | |
630 | continue; | |
631 | ||
632 | cd->sw_addr = be32_to_cpup(sw_addr); | |
633 | if (cd->sw_addr > PHY_MAX_ADDR) | |
634 | continue; | |
635 | ||
50d4964f | 636 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
637 | cd->eeprom_len = eeprom_len; |
638 | ||
5e95329b FF |
639 | for_each_available_child_of_node(child, port) { |
640 | port_reg = of_get_property(port, "reg", NULL); | |
641 | if (!port_reg) | |
642 | continue; | |
643 | ||
644 | port_index = be32_to_cpup(port_reg); | |
645 | ||
646 | port_name = of_get_property(port, "label", NULL); | |
647 | if (!port_name) | |
648 | continue; | |
649 | ||
bd47497a FF |
650 | cd->port_dn[port_index] = port; |
651 | ||
5e95329b FF |
652 | cd->port_names[port_index] = kstrdup(port_name, |
653 | GFP_KERNEL); | |
654 | if (!cd->port_names[port_index]) { | |
655 | ret = -ENOMEM; | |
656 | goto out_free_chip; | |
657 | } | |
658 | ||
659 | link = of_parse_phandle(port, "link", 0); | |
660 | ||
661 | if (!strcmp(port_name, "dsa") && link && | |
662 | pd->nr_chips > 1) { | |
663 | ret = dsa_of_setup_routing_table(pd, cd, | |
30303813 | 664 | chip_index, port_index, link); |
5e95329b FF |
665 | if (ret) |
666 | goto out_free_chip; | |
667 | } | |
668 | ||
669 | if (port_index == DSA_MAX_PORTS) | |
670 | break; | |
671 | } | |
672 | } | |
673 | ||
674 | return 0; | |
675 | ||
676 | out_free_chip: | |
21168245 | 677 | dsa_of_free_platform_data(pd); |
5e95329b FF |
678 | out_free: |
679 | kfree(pd); | |
f1a26a06 | 680 | dev->platform_data = NULL; |
5e95329b FF |
681 | return ret; |
682 | } | |
683 | ||
f1a26a06 | 684 | static void dsa_of_remove(struct device *dev) |
5e95329b | 685 | { |
f1a26a06 | 686 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 687 | |
f1a26a06 | 688 | if (!dev->of_node) |
5e95329b FF |
689 | return; |
690 | ||
21168245 | 691 | dsa_of_free_platform_data(pd); |
5e95329b FF |
692 | kfree(pd); |
693 | } | |
694 | #else | |
f1a26a06 | 695 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
696 | { |
697 | return 0; | |
698 | } | |
699 | ||
f1a26a06 | 700 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
701 | { |
702 | } | |
703 | #endif | |
704 | ||
c86e59b9 FF |
705 | static void dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
706 | struct device *parent, struct dsa_platform_data *pd) | |
707 | { | |
708 | int i; | |
709 | ||
710 | dst->pd = pd; | |
711 | dst->master_netdev = dev; | |
712 | dst->cpu_switch = -1; | |
713 | dst->cpu_port = -1; | |
714 | ||
715 | for (i = 0; i < pd->nr_chips; i++) { | |
716 | struct dsa_switch *ds; | |
717 | ||
718 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
719 | if (IS_ERR(ds)) { | |
720 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
721 | i, PTR_ERR(ds)); | |
722 | continue; | |
723 | } | |
724 | ||
725 | dst->ds[i] = ds; | |
726 | if (ds->drv->poll_link != NULL) | |
727 | dst->link_poll_needed = 1; | |
728 | } | |
729 | ||
730 | /* | |
731 | * If we use a tagging format that doesn't have an ethertype | |
732 | * field, make sure that all packets from this point on get | |
733 | * sent to the tag format's receive function. | |
734 | */ | |
735 | wmb(); | |
736 | dev->dsa_ptr = (void *)dst; | |
737 | ||
738 | if (dst->link_poll_needed) { | |
739 | INIT_WORK(&dst->link_poll_work, dsa_link_poll_work); | |
740 | init_timer(&dst->link_poll_timer); | |
741 | dst->link_poll_timer.data = (unsigned long)dst; | |
742 | dst->link_poll_timer.function = dsa_link_poll_timer; | |
743 | dst->link_poll_timer.expires = round_jiffies(jiffies + HZ); | |
744 | add_timer(&dst->link_poll_timer); | |
745 | } | |
746 | } | |
747 | ||
91da11f8 LB |
748 | static int dsa_probe(struct platform_device *pdev) |
749 | { | |
91da11f8 LB |
750 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
751 | struct net_device *dev; | |
e84665c9 | 752 | struct dsa_switch_tree *dst; |
c86e59b9 | 753 | int ret; |
91da11f8 | 754 | |
a2ae6007 JP |
755 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
756 | dsa_driver_version); | |
91da11f8 | 757 | |
5e95329b | 758 | if (pdev->dev.of_node) { |
f1a26a06 | 759 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
760 | if (ret) |
761 | return ret; | |
762 | ||
763 | pd = pdev->dev.platform_data; | |
764 | } | |
765 | ||
769a0202 | 766 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
767 | return -EINVAL; |
768 | ||
769a0202 FF |
769 | if (pd->of_netdev) { |
770 | dev = pd->of_netdev; | |
771 | dev_hold(dev); | |
772 | } else { | |
773 | dev = dev_to_net_device(pd->netdev); | |
774 | } | |
5e95329b | 775 | if (dev == NULL) { |
b324c07a | 776 | ret = -EPROBE_DEFER; |
5e95329b FF |
777 | goto out; |
778 | } | |
91da11f8 LB |
779 | |
780 | if (dev->dsa_ptr != NULL) { | |
781 | dev_put(dev); | |
5e95329b FF |
782 | ret = -EEXIST; |
783 | goto out; | |
91da11f8 LB |
784 | } |
785 | ||
e84665c9 LB |
786 | dst = kzalloc(sizeof(*dst), GFP_KERNEL); |
787 | if (dst == NULL) { | |
91da11f8 | 788 | dev_put(dev); |
5e95329b FF |
789 | ret = -ENOMEM; |
790 | goto out; | |
91da11f8 LB |
791 | } |
792 | ||
e84665c9 LB |
793 | platform_set_drvdata(pdev, dst); |
794 | ||
c86e59b9 | 795 | dsa_setup_dst(dst, dev, &pdev->dev, pd); |
91da11f8 LB |
796 | |
797 | return 0; | |
5e95329b FF |
798 | |
799 | out: | |
f1a26a06 | 800 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
801 | |
802 | return ret; | |
91da11f8 LB |
803 | } |
804 | ||
c86e59b9 | 805 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 806 | { |
e84665c9 | 807 | int i; |
91da11f8 | 808 | |
e84665c9 LB |
809 | if (dst->link_poll_needed) |
810 | del_timer_sync(&dst->link_poll_timer); | |
91da11f8 | 811 | |
43829731 | 812 | flush_work(&dst->link_poll_work); |
91da11f8 | 813 | |
e84665c9 LB |
814 | for (i = 0; i < dst->pd->nr_chips; i++) { |
815 | struct dsa_switch *ds = dst->ds[i]; | |
816 | ||
817 | if (ds != NULL) | |
818 | dsa_switch_destroy(ds); | |
819 | } | |
c86e59b9 FF |
820 | } |
821 | ||
822 | static int dsa_remove(struct platform_device *pdev) | |
823 | { | |
824 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 825 | |
c86e59b9 | 826 | dsa_remove_dst(dst); |
f1a26a06 | 827 | dsa_of_remove(&pdev->dev); |
5e95329b | 828 | |
91da11f8 LB |
829 | return 0; |
830 | } | |
831 | ||
832 | static void dsa_shutdown(struct platform_device *pdev) | |
833 | { | |
834 | } | |
835 | ||
3e8a72d1 FF |
836 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
837 | struct packet_type *pt, struct net_device *orig_dev) | |
838 | { | |
839 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
840 | ||
841 | if (unlikely(dst == NULL)) { | |
842 | kfree_skb(skb); | |
843 | return 0; | |
844 | } | |
845 | ||
5075314e | 846 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
847 | } |
848 | ||
61b7363f | 849 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
850 | .type = cpu_to_be16(ETH_P_XDSA), |
851 | .func = dsa_switch_rcv, | |
852 | }; | |
853 | ||
b73adef6 FF |
854 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
855 | .notifier_call = dsa_slave_netdevice_event, | |
856 | }; | |
857 | ||
24462549 FF |
858 | #ifdef CONFIG_PM_SLEEP |
859 | static int dsa_suspend(struct device *d) | |
860 | { | |
861 | struct platform_device *pdev = to_platform_device(d); | |
862 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
863 | int i, ret = 0; | |
864 | ||
865 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
866 | struct dsa_switch *ds = dst->ds[i]; | |
867 | ||
868 | if (ds != NULL) | |
869 | ret = dsa_switch_suspend(ds); | |
870 | } | |
871 | ||
872 | return ret; | |
873 | } | |
874 | ||
875 | static int dsa_resume(struct device *d) | |
876 | { | |
877 | struct platform_device *pdev = to_platform_device(d); | |
878 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
879 | int i, ret = 0; | |
880 | ||
881 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
882 | struct dsa_switch *ds = dst->ds[i]; | |
883 | ||
884 | if (ds != NULL) | |
885 | ret = dsa_switch_resume(ds); | |
886 | } | |
887 | ||
888 | return ret; | |
889 | } | |
890 | #endif | |
891 | ||
892 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
893 | ||
5e95329b | 894 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 895 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
896 | { .compatible = "marvell,dsa", }, |
897 | {} | |
898 | }; | |
899 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
900 | ||
91da11f8 LB |
901 | static struct platform_driver dsa_driver = { |
902 | .probe = dsa_probe, | |
903 | .remove = dsa_remove, | |
904 | .shutdown = dsa_shutdown, | |
905 | .driver = { | |
906 | .name = "dsa", | |
5e95329b | 907 | .of_match_table = dsa_of_match_table, |
24462549 | 908 | .pm = &dsa_pm_ops, |
91da11f8 LB |
909 | }, |
910 | }; | |
911 | ||
912 | static int __init dsa_init_module(void) | |
913 | { | |
7df899c3 BH |
914 | int rc; |
915 | ||
b73adef6 FF |
916 | register_netdevice_notifier(&dsa_netdevice_nb); |
917 | ||
7df899c3 BH |
918 | rc = platform_driver_register(&dsa_driver); |
919 | if (rc) | |
920 | return rc; | |
921 | ||
3e8a72d1 FF |
922 | dev_add_pack(&dsa_pack_type); |
923 | ||
7df899c3 | 924 | return 0; |
91da11f8 LB |
925 | } |
926 | module_init(dsa_init_module); | |
927 | ||
928 | static void __exit dsa_cleanup_module(void) | |
929 | { | |
b73adef6 | 930 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 931 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
932 | platform_driver_unregister(&dsa_driver); |
933 | } | |
934 | module_exit(dsa_cleanup_module); | |
935 | ||
577d6a7c | 936 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
937 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
938 | MODULE_LICENSE("GPL"); | |
939 | MODULE_ALIAS("platform:dsa"); |