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Commit | Line | Data |
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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> | |
51579c3f | 23 | #include <linux/sysfs.h> |
91da11f8 LB |
24 | #include "dsa_priv.h" |
25 | ||
26 | char dsa_driver_version[] = "0.1"; | |
27 | ||
28 | ||
29 | /* switch driver registration ***********************************************/ | |
30 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
31 | static LIST_HEAD(dsa_switch_drivers); | |
32 | ||
33 | void register_switch_driver(struct dsa_switch_driver *drv) | |
34 | { | |
35 | mutex_lock(&dsa_switch_drivers_mutex); | |
36 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
37 | mutex_unlock(&dsa_switch_drivers_mutex); | |
38 | } | |
ad293b8a | 39 | EXPORT_SYMBOL_GPL(register_switch_driver); |
91da11f8 LB |
40 | |
41 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
42 | { | |
43 | mutex_lock(&dsa_switch_drivers_mutex); | |
44 | list_del_init(&drv->list); | |
45 | mutex_unlock(&dsa_switch_drivers_mutex); | |
46 | } | |
ad293b8a | 47 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
91da11f8 LB |
48 | |
49 | static struct dsa_switch_driver * | |
b4d2394d | 50 | dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name) |
91da11f8 LB |
51 | { |
52 | struct dsa_switch_driver *ret; | |
53 | struct list_head *list; | |
54 | char *name; | |
55 | ||
56 | ret = NULL; | |
57 | name = NULL; | |
58 | ||
59 | mutex_lock(&dsa_switch_drivers_mutex); | |
60 | list_for_each(list, &dsa_switch_drivers) { | |
61 | struct dsa_switch_driver *drv; | |
62 | ||
63 | drv = list_entry(list, struct dsa_switch_driver, list); | |
64 | ||
b4d2394d | 65 | name = drv->probe(host_dev, sw_addr); |
91da11f8 LB |
66 | if (name != NULL) { |
67 | ret = drv; | |
68 | break; | |
69 | } | |
70 | } | |
71 | mutex_unlock(&dsa_switch_drivers_mutex); | |
72 | ||
73 | *_name = name; | |
74 | ||
75 | return ret; | |
76 | } | |
77 | ||
51579c3f GR |
78 | /* hwmon support ************************************************************/ |
79 | ||
80 | #ifdef CONFIG_NET_DSA_HWMON | |
81 | ||
82 | static ssize_t temp1_input_show(struct device *dev, | |
83 | struct device_attribute *attr, char *buf) | |
84 | { | |
85 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
86 | int temp, ret; | |
87 | ||
88 | ret = ds->drv->get_temp(ds, &temp); | |
89 | if (ret < 0) | |
90 | return ret; | |
91 | ||
92 | return sprintf(buf, "%d\n", temp * 1000); | |
93 | } | |
94 | static DEVICE_ATTR_RO(temp1_input); | |
95 | ||
96 | static ssize_t temp1_max_show(struct device *dev, | |
97 | struct device_attribute *attr, char *buf) | |
98 | { | |
99 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
100 | int temp, ret; | |
101 | ||
102 | ret = ds->drv->get_temp_limit(ds, &temp); | |
103 | if (ret < 0) | |
104 | return ret; | |
105 | ||
106 | return sprintf(buf, "%d\n", temp * 1000); | |
107 | } | |
108 | ||
109 | static ssize_t temp1_max_store(struct device *dev, | |
110 | struct device_attribute *attr, const char *buf, | |
111 | size_t count) | |
112 | { | |
113 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
114 | int temp, ret; | |
115 | ||
116 | ret = kstrtoint(buf, 0, &temp); | |
117 | if (ret < 0) | |
118 | return ret; | |
119 | ||
120 | ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000)); | |
121 | if (ret < 0) | |
122 | return ret; | |
123 | ||
124 | return count; | |
125 | } | |
126 | static DEVICE_ATTR(temp1_max, S_IRUGO, temp1_max_show, temp1_max_store); | |
127 | ||
128 | static ssize_t temp1_max_alarm_show(struct device *dev, | |
129 | struct device_attribute *attr, char *buf) | |
130 | { | |
131 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
132 | bool alarm; | |
133 | int ret; | |
134 | ||
135 | ret = ds->drv->get_temp_alarm(ds, &alarm); | |
136 | if (ret < 0) | |
137 | return ret; | |
138 | ||
139 | return sprintf(buf, "%d\n", alarm); | |
140 | } | |
141 | static DEVICE_ATTR_RO(temp1_max_alarm); | |
142 | ||
143 | static struct attribute *dsa_hwmon_attrs[] = { | |
144 | &dev_attr_temp1_input.attr, /* 0 */ | |
145 | &dev_attr_temp1_max.attr, /* 1 */ | |
146 | &dev_attr_temp1_max_alarm.attr, /* 2 */ | |
147 | NULL | |
148 | }; | |
149 | ||
150 | static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj, | |
151 | struct attribute *attr, int index) | |
152 | { | |
153 | struct device *dev = container_of(kobj, struct device, kobj); | |
154 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
155 | struct dsa_switch_driver *drv = ds->drv; | |
156 | umode_t mode = attr->mode; | |
157 | ||
158 | if (index == 1) { | |
159 | if (!drv->get_temp_limit) | |
160 | mode = 0; | |
161 | else if (drv->set_temp_limit) | |
162 | mode |= S_IWUSR; | |
163 | } else if (index == 2 && !drv->get_temp_alarm) { | |
164 | mode = 0; | |
165 | } | |
166 | return mode; | |
167 | } | |
168 | ||
169 | static const struct attribute_group dsa_hwmon_group = { | |
170 | .attrs = dsa_hwmon_attrs, | |
171 | .is_visible = dsa_hwmon_attrs_visible, | |
172 | }; | |
173 | __ATTRIBUTE_GROUPS(dsa_hwmon); | |
174 | ||
175 | #endif /* CONFIG_NET_DSA_HWMON */ | |
91da11f8 LB |
176 | |
177 | /* basic switch operations **************************************************/ | |
178 | static struct dsa_switch * | |
e84665c9 | 179 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, |
b4d2394d | 180 | struct device *parent, struct device *host_dev) |
91da11f8 | 181 | { |
e84665c9 LB |
182 | struct dsa_chip_data *pd = dst->pd->chip + index; |
183 | struct dsa_switch_driver *drv; | |
91da11f8 LB |
184 | struct dsa_switch *ds; |
185 | int ret; | |
91da11f8 LB |
186 | char *name; |
187 | int i; | |
f9bf5a2c | 188 | bool valid_name_found = false; |
91da11f8 LB |
189 | |
190 | /* | |
191 | * Probe for switch model. | |
192 | */ | |
b4d2394d | 193 | drv = dsa_switch_probe(host_dev, pd->sw_addr, &name); |
91da11f8 | 194 | if (drv == NULL) { |
a2ae6007 JP |
195 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", |
196 | index); | |
91da11f8 LB |
197 | return ERR_PTR(-EINVAL); |
198 | } | |
a2ae6007 JP |
199 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", |
200 | index, name); | |
91da11f8 LB |
201 | |
202 | ||
203 | /* | |
204 | * Allocate and initialise switch state. | |
205 | */ | |
206 | ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL); | |
207 | if (ds == NULL) | |
208 | return ERR_PTR(-ENOMEM); | |
209 | ||
e84665c9 LB |
210 | ds->dst = dst; |
211 | ds->index = index; | |
212 | ds->pd = dst->pd->chip + index; | |
91da11f8 | 213 | ds->drv = drv; |
b4d2394d | 214 | ds->master_dev = host_dev; |
91da11f8 LB |
215 | |
216 | /* | |
217 | * Validate supplied switch configuration. | |
218 | */ | |
91da11f8 LB |
219 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
220 | char *name; | |
221 | ||
222 | name = pd->port_names[i]; | |
223 | if (name == NULL) | |
224 | continue; | |
225 | ||
226 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 227 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
228 | netdev_err(dst->master_netdev, |
229 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
230 | ret = -EINVAL; |
231 | goto out; | |
232 | } | |
e84665c9 LB |
233 | dst->cpu_switch = index; |
234 | dst->cpu_port = i; | |
235 | } else if (!strcmp(name, "dsa")) { | |
236 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 237 | } else { |
e84665c9 | 238 | ds->phys_port_mask |= 1 << i; |
91da11f8 | 239 | } |
f9bf5a2c | 240 | valid_name_found = true; |
91da11f8 LB |
241 | } |
242 | ||
f9bf5a2c FF |
243 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
244 | ret = -EINVAL; | |
245 | goto out; | |
246 | } | |
91da11f8 | 247 | |
0d8bcdd3 FF |
248 | /* Make the built-in MII bus mask match the number of ports, |
249 | * switch drivers can override this later | |
250 | */ | |
251 | ds->phys_mii_mask = ds->phys_port_mask; | |
252 | ||
91da11f8 | 253 | /* |
e84665c9 LB |
254 | * If the CPU connects to this switch, set the switch tree |
255 | * tagging protocol to the preferred tagging format of this | |
256 | * switch. | |
91da11f8 | 257 | */ |
5075314e AD |
258 | if (dst->cpu_switch == index) { |
259 | switch (drv->tag_protocol) { | |
260 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
261 | case DSA_TAG_PROTO_DSA: | |
262 | dst->rcv = dsa_netdev_ops.rcv; | |
263 | break; | |
264 | #endif | |
265 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
266 | case DSA_TAG_PROTO_EDSA: | |
267 | dst->rcv = edsa_netdev_ops.rcv; | |
268 | break; | |
269 | #endif | |
270 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
271 | case DSA_TAG_PROTO_TRAILER: | |
272 | dst->rcv = trailer_netdev_ops.rcv; | |
273 | break; | |
274 | #endif | |
275 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
276 | case DSA_TAG_PROTO_BRCM: | |
277 | dst->rcv = brcm_netdev_ops.rcv; | |
278 | break; | |
279 | #endif | |
ae439286 | 280 | case DSA_TAG_PROTO_NONE: |
5075314e | 281 | break; |
ae439286 AL |
282 | default: |
283 | ret = -ENOPROTOOPT; | |
284 | goto out; | |
5075314e | 285 | } |
91da11f8 | 286 | |
5075314e AD |
287 | dst->tag_protocol = drv->tag_protocol; |
288 | } | |
91da11f8 LB |
289 | |
290 | /* | |
291 | * Do basic register setup. | |
292 | */ | |
293 | ret = drv->setup(ds); | |
294 | if (ret < 0) | |
295 | goto out; | |
296 | ||
e84665c9 | 297 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
298 | if (ret < 0) |
299 | goto out; | |
300 | ||
301 | ds->slave_mii_bus = mdiobus_alloc(); | |
302 | if (ds->slave_mii_bus == NULL) { | |
303 | ret = -ENOMEM; | |
304 | goto out; | |
305 | } | |
306 | dsa_slave_mii_bus_init(ds); | |
307 | ||
308 | ret = mdiobus_register(ds->slave_mii_bus); | |
309 | if (ret < 0) | |
310 | goto out_free; | |
311 | ||
312 | ||
313 | /* | |
314 | * Create network devices for physical switch ports. | |
315 | */ | |
91da11f8 | 316 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
e84665c9 | 317 | if (!(ds->phys_port_mask & (1 << i))) |
91da11f8 LB |
318 | continue; |
319 | ||
d87d6f44 GR |
320 | ret = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
321 | if (ret < 0) { | |
a2ae6007 JP |
322 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s)\n", |
323 | index, i, pd->port_names[i]); | |
d87d6f44 | 324 | ret = 0; |
91da11f8 | 325 | } |
91da11f8 LB |
326 | } |
327 | ||
51579c3f GR |
328 | #ifdef CONFIG_NET_DSA_HWMON |
329 | /* If the switch provides a temperature sensor, | |
330 | * register with hardware monitoring subsystem. | |
331 | * Treat registration error as non-fatal and ignore it. | |
332 | */ | |
333 | if (drv->get_temp) { | |
334 | const char *netname = netdev_name(dst->master_netdev); | |
335 | char hname[IFNAMSIZ + 1]; | |
336 | int i, j; | |
337 | ||
338 | /* Create valid hwmon 'name' attribute */ | |
339 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
340 | if (isalnum(netname[i])) | |
341 | hname[j++] = netname[i]; | |
342 | } | |
343 | hname[j] = '\0'; | |
344 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
345 | hname, index); | |
346 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
347 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
348 | if (IS_ERR(ds->hwmon_dev)) | |
349 | ds->hwmon_dev = NULL; | |
350 | } | |
351 | #endif /* CONFIG_NET_DSA_HWMON */ | |
352 | ||
91da11f8 LB |
353 | return ds; |
354 | ||
355 | out_free: | |
356 | mdiobus_free(ds->slave_mii_bus); | |
357 | out: | |
91da11f8 LB |
358 | kfree(ds); |
359 | return ERR_PTR(ret); | |
360 | } | |
361 | ||
362 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
363 | { | |
51579c3f GR |
364 | #ifdef CONFIG_NET_DSA_HWMON |
365 | if (ds->hwmon_dev) | |
366 | hwmon_device_unregister(ds->hwmon_dev); | |
367 | #endif | |
91da11f8 LB |
368 | } |
369 | ||
e506d405 | 370 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
371 | static int dsa_switch_suspend(struct dsa_switch *ds) |
372 | { | |
373 | int i, ret = 0; | |
374 | ||
375 | /* Suspend slave network devices */ | |
376 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
377 | if (!(ds->phys_port_mask & (1 << i))) | |
378 | continue; | |
379 | ||
380 | ret = dsa_slave_suspend(ds->ports[i]); | |
381 | if (ret) | |
382 | return ret; | |
383 | } | |
384 | ||
385 | if (ds->drv->suspend) | |
386 | ret = ds->drv->suspend(ds); | |
387 | ||
388 | return ret; | |
389 | } | |
390 | ||
391 | static int dsa_switch_resume(struct dsa_switch *ds) | |
392 | { | |
393 | int i, ret = 0; | |
394 | ||
395 | if (ds->drv->resume) | |
396 | ret = ds->drv->resume(ds); | |
397 | ||
398 | if (ret) | |
399 | return ret; | |
400 | ||
401 | /* Resume slave network devices */ | |
402 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
403 | if (!(ds->phys_port_mask & (1 << i))) | |
404 | continue; | |
405 | ||
406 | ret = dsa_slave_resume(ds->ports[i]); | |
407 | if (ret) | |
408 | return ret; | |
409 | } | |
410 | ||
411 | return 0; | |
412 | } | |
e506d405 | 413 | #endif |
24462549 | 414 | |
91da11f8 LB |
415 | |
416 | /* link polling *************************************************************/ | |
417 | static void dsa_link_poll_work(struct work_struct *ugly) | |
418 | { | |
e84665c9 LB |
419 | struct dsa_switch_tree *dst; |
420 | int i; | |
421 | ||
422 | dst = container_of(ugly, struct dsa_switch_tree, link_poll_work); | |
91da11f8 | 423 | |
e84665c9 LB |
424 | for (i = 0; i < dst->pd->nr_chips; i++) { |
425 | struct dsa_switch *ds = dst->ds[i]; | |
91da11f8 | 426 | |
e84665c9 LB |
427 | if (ds != NULL && ds->drv->poll_link != NULL) |
428 | ds->drv->poll_link(ds); | |
429 | } | |
430 | ||
431 | mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ)); | |
91da11f8 LB |
432 | } |
433 | ||
e84665c9 | 434 | static void dsa_link_poll_timer(unsigned long _dst) |
91da11f8 | 435 | { |
e84665c9 | 436 | struct dsa_switch_tree *dst = (void *)_dst; |
91da11f8 | 437 | |
e84665c9 | 438 | schedule_work(&dst->link_poll_work); |
91da11f8 LB |
439 | } |
440 | ||
441 | ||
442 | /* platform driver init and cleanup *****************************************/ | |
443 | static int dev_is_class(struct device *dev, void *class) | |
444 | { | |
445 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
446 | return 1; | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
451 | static struct device *dev_find_class(struct device *parent, char *class) | |
452 | { | |
453 | if (dev_is_class(parent, class)) { | |
454 | get_device(parent); | |
455 | return parent; | |
456 | } | |
457 | ||
458 | return device_find_child(parent, class, dev_is_class); | |
459 | } | |
460 | ||
b4d2394d | 461 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
462 | { |
463 | struct device *d; | |
464 | ||
465 | d = dev_find_class(dev, "mdio_bus"); | |
466 | if (d != NULL) { | |
467 | struct mii_bus *bus; | |
468 | ||
469 | bus = to_mii_bus(d); | |
470 | put_device(d); | |
471 | ||
472 | return bus; | |
473 | } | |
474 | ||
475 | return NULL; | |
476 | } | |
b4d2394d | 477 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
478 | |
479 | static struct net_device *dev_to_net_device(struct device *dev) | |
480 | { | |
481 | struct device *d; | |
482 | ||
483 | d = dev_find_class(dev, "net"); | |
484 | if (d != NULL) { | |
485 | struct net_device *nd; | |
486 | ||
487 | nd = to_net_dev(d); | |
488 | dev_hold(nd); | |
489 | put_device(d); | |
490 | ||
491 | return nd; | |
492 | } | |
493 | ||
494 | return NULL; | |
495 | } | |
496 | ||
5e95329b FF |
497 | #ifdef CONFIG_OF |
498 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
499 | struct dsa_chip_data *cd, | |
500 | int chip_index, | |
501 | struct device_node *link) | |
502 | { | |
503 | int ret; | |
504 | const __be32 *reg; | |
505 | int link_port_addr; | |
506 | int link_sw_addr; | |
507 | struct device_node *parent_sw; | |
508 | int len; | |
509 | ||
510 | parent_sw = of_get_parent(link); | |
511 | if (!parent_sw) | |
512 | return -EINVAL; | |
513 | ||
514 | reg = of_get_property(parent_sw, "reg", &len); | |
515 | if (!reg || (len != sizeof(*reg) * 2)) | |
516 | return -EINVAL; | |
517 | ||
518 | link_sw_addr = be32_to_cpup(reg + 1); | |
519 | ||
520 | if (link_sw_addr >= pd->nr_chips) | |
521 | return -EINVAL; | |
522 | ||
523 | /* First time routing table allocation */ | |
524 | if (!cd->rtable) { | |
5bc4b46a FF |
525 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
526 | GFP_KERNEL); | |
5e95329b FF |
527 | if (!cd->rtable) |
528 | return -ENOMEM; | |
529 | ||
530 | /* default to no valid uplink/downlink */ | |
531 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
532 | } | |
533 | ||
534 | reg = of_get_property(link, "reg", NULL); | |
535 | if (!reg) { | |
536 | ret = -EINVAL; | |
537 | goto out; | |
538 | } | |
539 | ||
540 | link_port_addr = be32_to_cpup(reg); | |
541 | ||
542 | cd->rtable[link_sw_addr] = link_port_addr; | |
543 | ||
544 | return 0; | |
545 | out: | |
546 | kfree(cd->rtable); | |
547 | return ret; | |
548 | } | |
549 | ||
21168245 FF |
550 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
551 | { | |
552 | int i; | |
553 | int port_index; | |
554 | ||
555 | for (i = 0; i < pd->nr_chips; i++) { | |
556 | port_index = 0; | |
5f64a7db | 557 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 558 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
559 | port_index++; |
560 | } | |
21168245 FF |
561 | kfree(pd->chip[i].rtable); |
562 | } | |
563 | kfree(pd->chip); | |
564 | } | |
565 | ||
5e95329b FF |
566 | static int dsa_of_probe(struct platform_device *pdev) |
567 | { | |
568 | struct device_node *np = pdev->dev.of_node; | |
569 | struct device_node *child, *mdio, *ethernet, *port, *link; | |
570 | struct mii_bus *mdio_bus; | |
571 | struct platform_device *ethernet_dev; | |
572 | struct dsa_platform_data *pd; | |
573 | struct dsa_chip_data *cd; | |
574 | const char *port_name; | |
575 | int chip_index, port_index; | |
576 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 577 | u32 eeprom_len; |
21168245 | 578 | int ret; |
5e95329b FF |
579 | |
580 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
581 | if (!mdio) | |
582 | return -EINVAL; | |
583 | ||
584 | mdio_bus = of_mdio_find_bus(mdio); | |
585 | if (!mdio_bus) | |
586 | return -EINVAL; | |
587 | ||
588 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
589 | if (!ethernet) | |
590 | return -EINVAL; | |
591 | ||
592 | ethernet_dev = of_find_device_by_node(ethernet); | |
593 | if (!ethernet_dev) | |
594 | return -ENODEV; | |
595 | ||
596 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
597 | if (!pd) | |
598 | return -ENOMEM; | |
599 | ||
600 | pdev->dev.platform_data = pd; | |
601 | pd->netdev = ðernet_dev->dev; | |
e04449fc | 602 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
603 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
604 | pd->nr_chips = DSA_MAX_SWITCHES; | |
605 | ||
6f2aed6a FF |
606 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
607 | GFP_KERNEL); | |
5e95329b FF |
608 | if (!pd->chip) { |
609 | ret = -ENOMEM; | |
610 | goto out_free; | |
611 | } | |
612 | ||
d1c0b471 | 613 | chip_index = -1; |
5e95329b | 614 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 615 | chip_index++; |
5e95329b FF |
616 | cd = &pd->chip[chip_index]; |
617 | ||
fa981d9a | 618 | cd->of_node = child; |
c1f570a6 | 619 | cd->host_dev = &mdio_bus->dev; |
5e95329b FF |
620 | |
621 | sw_addr = of_get_property(child, "reg", NULL); | |
622 | if (!sw_addr) | |
623 | continue; | |
624 | ||
625 | cd->sw_addr = be32_to_cpup(sw_addr); | |
626 | if (cd->sw_addr > PHY_MAX_ADDR) | |
627 | continue; | |
628 | ||
6793abb4 GR |
629 | if (!of_property_read_u32(np, "eeprom-length", &eeprom_len)) |
630 | cd->eeprom_len = eeprom_len; | |
631 | ||
5e95329b FF |
632 | for_each_available_child_of_node(child, port) { |
633 | port_reg = of_get_property(port, "reg", NULL); | |
634 | if (!port_reg) | |
635 | continue; | |
636 | ||
637 | port_index = be32_to_cpup(port_reg); | |
638 | ||
639 | port_name = of_get_property(port, "label", NULL); | |
640 | if (!port_name) | |
641 | continue; | |
642 | ||
bd47497a FF |
643 | cd->port_dn[port_index] = port; |
644 | ||
5e95329b FF |
645 | cd->port_names[port_index] = kstrdup(port_name, |
646 | GFP_KERNEL); | |
647 | if (!cd->port_names[port_index]) { | |
648 | ret = -ENOMEM; | |
649 | goto out_free_chip; | |
650 | } | |
651 | ||
652 | link = of_parse_phandle(port, "link", 0); | |
653 | ||
654 | if (!strcmp(port_name, "dsa") && link && | |
655 | pd->nr_chips > 1) { | |
656 | ret = dsa_of_setup_routing_table(pd, cd, | |
657 | chip_index, link); | |
658 | if (ret) | |
659 | goto out_free_chip; | |
660 | } | |
661 | ||
662 | if (port_index == DSA_MAX_PORTS) | |
663 | break; | |
664 | } | |
665 | } | |
666 | ||
667 | return 0; | |
668 | ||
669 | out_free_chip: | |
21168245 | 670 | dsa_of_free_platform_data(pd); |
5e95329b FF |
671 | out_free: |
672 | kfree(pd); | |
673 | pdev->dev.platform_data = NULL; | |
674 | return ret; | |
675 | } | |
676 | ||
677 | static void dsa_of_remove(struct platform_device *pdev) | |
678 | { | |
679 | struct dsa_platform_data *pd = pdev->dev.platform_data; | |
5e95329b FF |
680 | |
681 | if (!pdev->dev.of_node) | |
682 | return; | |
683 | ||
21168245 | 684 | dsa_of_free_platform_data(pd); |
5e95329b FF |
685 | kfree(pd); |
686 | } | |
687 | #else | |
688 | static inline int dsa_of_probe(struct platform_device *pdev) | |
689 | { | |
690 | return 0; | |
691 | } | |
692 | ||
693 | static inline void dsa_of_remove(struct platform_device *pdev) | |
694 | { | |
695 | } | |
696 | #endif | |
697 | ||
91da11f8 LB |
698 | static int dsa_probe(struct platform_device *pdev) |
699 | { | |
91da11f8 LB |
700 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
701 | struct net_device *dev; | |
e84665c9 | 702 | struct dsa_switch_tree *dst; |
5e95329b | 703 | int i, ret; |
91da11f8 | 704 | |
a2ae6007 JP |
705 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
706 | dsa_driver_version); | |
91da11f8 | 707 | |
5e95329b FF |
708 | if (pdev->dev.of_node) { |
709 | ret = dsa_of_probe(pdev); | |
710 | if (ret) | |
711 | return ret; | |
712 | ||
713 | pd = pdev->dev.platform_data; | |
714 | } | |
715 | ||
e84665c9 | 716 | if (pd == NULL || pd->netdev == NULL) |
91da11f8 LB |
717 | return -EINVAL; |
718 | ||
719 | dev = dev_to_net_device(pd->netdev); | |
5e95329b FF |
720 | if (dev == NULL) { |
721 | ret = -EINVAL; | |
722 | goto out; | |
723 | } | |
91da11f8 LB |
724 | |
725 | if (dev->dsa_ptr != NULL) { | |
726 | dev_put(dev); | |
5e95329b FF |
727 | ret = -EEXIST; |
728 | goto out; | |
91da11f8 LB |
729 | } |
730 | ||
e84665c9 LB |
731 | dst = kzalloc(sizeof(*dst), GFP_KERNEL); |
732 | if (dst == NULL) { | |
91da11f8 | 733 | dev_put(dev); |
5e95329b FF |
734 | ret = -ENOMEM; |
735 | goto out; | |
91da11f8 LB |
736 | } |
737 | ||
e84665c9 LB |
738 | platform_set_drvdata(pdev, dst); |
739 | ||
740 | dst->pd = pd; | |
741 | dst->master_netdev = dev; | |
742 | dst->cpu_switch = -1; | |
743 | dst->cpu_port = -1; | |
744 | ||
745 | for (i = 0; i < pd->nr_chips; i++) { | |
e84665c9 LB |
746 | struct dsa_switch *ds; |
747 | ||
b4d2394d | 748 | ds = dsa_switch_setup(dst, i, &pdev->dev, pd->chip[i].host_dev); |
e84665c9 | 749 | if (IS_ERR(ds)) { |
a2ae6007 JP |
750 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", |
751 | i, PTR_ERR(ds)); | |
e84665c9 LB |
752 | continue; |
753 | } | |
754 | ||
755 | dst->ds[i] = ds; | |
756 | if (ds->drv->poll_link != NULL) | |
757 | dst->link_poll_needed = 1; | |
91da11f8 LB |
758 | } |
759 | ||
e84665c9 LB |
760 | /* |
761 | * If we use a tagging format that doesn't have an ethertype | |
762 | * field, make sure that all packets from this point on get | |
763 | * sent to the tag format's receive function. | |
764 | */ | |
765 | wmb(); | |
766 | dev->dsa_ptr = (void *)dst; | |
767 | ||
768 | if (dst->link_poll_needed) { | |
769 | INIT_WORK(&dst->link_poll_work, dsa_link_poll_work); | |
770 | init_timer(&dst->link_poll_timer); | |
771 | dst->link_poll_timer.data = (unsigned long)dst; | |
772 | dst->link_poll_timer.function = dsa_link_poll_timer; | |
773 | dst->link_poll_timer.expires = round_jiffies(jiffies + HZ); | |
774 | add_timer(&dst->link_poll_timer); | |
775 | } | |
91da11f8 LB |
776 | |
777 | return 0; | |
5e95329b FF |
778 | |
779 | out: | |
780 | dsa_of_remove(pdev); | |
781 | ||
782 | return ret; | |
91da11f8 LB |
783 | } |
784 | ||
785 | static int dsa_remove(struct platform_device *pdev) | |
786 | { | |
e84665c9 LB |
787 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); |
788 | int i; | |
91da11f8 | 789 | |
e84665c9 LB |
790 | if (dst->link_poll_needed) |
791 | del_timer_sync(&dst->link_poll_timer); | |
91da11f8 | 792 | |
43829731 | 793 | flush_work(&dst->link_poll_work); |
91da11f8 | 794 | |
e84665c9 LB |
795 | for (i = 0; i < dst->pd->nr_chips; i++) { |
796 | struct dsa_switch *ds = dst->ds[i]; | |
797 | ||
798 | if (ds != NULL) | |
799 | dsa_switch_destroy(ds); | |
800 | } | |
91da11f8 | 801 | |
5e95329b FF |
802 | dsa_of_remove(pdev); |
803 | ||
91da11f8 LB |
804 | return 0; |
805 | } | |
806 | ||
807 | static void dsa_shutdown(struct platform_device *pdev) | |
808 | { | |
809 | } | |
810 | ||
3e8a72d1 FF |
811 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
812 | struct packet_type *pt, struct net_device *orig_dev) | |
813 | { | |
814 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
815 | ||
816 | if (unlikely(dst == NULL)) { | |
817 | kfree_skb(skb); | |
818 | return 0; | |
819 | } | |
820 | ||
5075314e | 821 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
822 | } |
823 | ||
61b7363f | 824 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
825 | .type = cpu_to_be16(ETH_P_XDSA), |
826 | .func = dsa_switch_rcv, | |
827 | }; | |
828 | ||
24462549 FF |
829 | #ifdef CONFIG_PM_SLEEP |
830 | static int dsa_suspend(struct device *d) | |
831 | { | |
832 | struct platform_device *pdev = to_platform_device(d); | |
833 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
834 | int i, ret = 0; | |
835 | ||
836 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
837 | struct dsa_switch *ds = dst->ds[i]; | |
838 | ||
839 | if (ds != NULL) | |
840 | ret = dsa_switch_suspend(ds); | |
841 | } | |
842 | ||
843 | return ret; | |
844 | } | |
845 | ||
846 | static int dsa_resume(struct device *d) | |
847 | { | |
848 | struct platform_device *pdev = to_platform_device(d); | |
849 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
850 | int i, ret = 0; | |
851 | ||
852 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
853 | struct dsa_switch *ds = dst->ds[i]; | |
854 | ||
855 | if (ds != NULL) | |
856 | ret = dsa_switch_resume(ds); | |
857 | } | |
858 | ||
859 | return ret; | |
860 | } | |
861 | #endif | |
862 | ||
863 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
864 | ||
5e95329b | 865 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 866 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
867 | { .compatible = "marvell,dsa", }, |
868 | {} | |
869 | }; | |
870 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
871 | ||
91da11f8 LB |
872 | static struct platform_driver dsa_driver = { |
873 | .probe = dsa_probe, | |
874 | .remove = dsa_remove, | |
875 | .shutdown = dsa_shutdown, | |
876 | .driver = { | |
877 | .name = "dsa", | |
5e95329b | 878 | .of_match_table = dsa_of_match_table, |
24462549 | 879 | .pm = &dsa_pm_ops, |
91da11f8 LB |
880 | }, |
881 | }; | |
882 | ||
883 | static int __init dsa_init_module(void) | |
884 | { | |
7df899c3 BH |
885 | int rc; |
886 | ||
887 | rc = platform_driver_register(&dsa_driver); | |
888 | if (rc) | |
889 | return rc; | |
890 | ||
3e8a72d1 FF |
891 | dev_add_pack(&dsa_pack_type); |
892 | ||
7df899c3 | 893 | return 0; |
91da11f8 LB |
894 | } |
895 | module_init(dsa_init_module); | |
896 | ||
897 | static void __exit dsa_cleanup_module(void) | |
898 | { | |
3e8a72d1 | 899 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
900 | platform_driver_unregister(&dsa_driver); |
901 | } | |
902 | module_exit(dsa_cleanup_module); | |
903 | ||
577d6a7c | 904 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
905 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
906 | MODULE_LICENSE("GPL"); | |
907 | MODULE_ALIAS("platform:dsa"); |