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a6a71f19 VD |
1 | /* |
2 | * net/dsa/legacy.c - Hardware switch handling | |
3 | * Copyright (c) 2008-2009 Marvell Semiconductor | |
4 | * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> | |
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 | ||
12 | #include <linux/device.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/of.h> | |
18 | #include <linux/of_mdio.h> | |
19 | #include <linux/of_platform.h> | |
20 | #include <linux/of_net.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/sysfs.h> | |
23 | #include <linux/phy_fixed.h> | |
24 | #include <linux/etherdevice.h> | |
ea5dd34b | 25 | |
a6a71f19 VD |
26 | #include "dsa_priv.h" |
27 | ||
28 | /* switch driver registration ***********************************************/ | |
29 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
30 | static LIST_HEAD(dsa_switch_drivers); | |
31 | ||
32 | void register_switch_driver(struct dsa_switch_driver *drv) | |
33 | { | |
34 | mutex_lock(&dsa_switch_drivers_mutex); | |
35 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
36 | mutex_unlock(&dsa_switch_drivers_mutex); | |
37 | } | |
38 | EXPORT_SYMBOL_GPL(register_switch_driver); | |
39 | ||
40 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
41 | { | |
42 | mutex_lock(&dsa_switch_drivers_mutex); | |
43 | list_del_init(&drv->list); | |
44 | mutex_unlock(&dsa_switch_drivers_mutex); | |
45 | } | |
46 | EXPORT_SYMBOL_GPL(unregister_switch_driver); | |
47 | ||
48 | static const struct dsa_switch_ops * | |
49 | dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr, | |
50 | const char **_name, void **priv) | |
51 | { | |
52 | const struct dsa_switch_ops *ret; | |
53 | struct list_head *list; | |
54 | const 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 | const struct dsa_switch_ops *ops; | |
62 | struct dsa_switch_driver *drv; | |
63 | ||
64 | drv = list_entry(list, struct dsa_switch_driver, list); | |
65 | ops = drv->ops; | |
66 | ||
67 | name = ops->probe(parent, host_dev, sw_addr, priv); | |
68 | if (name != NULL) { | |
69 | ret = ops; | |
70 | break; | |
71 | } | |
72 | } | |
73 | mutex_unlock(&dsa_switch_drivers_mutex); | |
74 | ||
75 | *_name = name; | |
76 | ||
77 | return ret; | |
78 | } | |
79 | ||
80 | /* basic switch operations **************************************************/ | |
81 | static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev) | |
82 | { | |
83 | struct dsa_port *dport; | |
84 | int ret, port; | |
85 | ||
86 | for (port = 0; port < ds->num_ports; port++) { | |
87 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
88 | continue; | |
89 | ||
90 | dport = &ds->ports[port]; | |
91 | ret = dsa_cpu_dsa_setup(ds, dev, dport, port); | |
92 | if (ret) | |
93 | return ret; | |
94 | } | |
95 | return 0; | |
96 | } | |
97 | ||
06d4d450 FF |
98 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct net_device *master, |
99 | struct device *parent) | |
a6a71f19 VD |
100 | { |
101 | const struct dsa_switch_ops *ops = ds->ops; | |
102 | struct dsa_switch_tree *dst = ds->dst; | |
103 | struct dsa_chip_data *cd = ds->cd; | |
104 | bool valid_name_found = false; | |
105 | int index = ds->index; | |
106 | int i, ret; | |
107 | ||
108 | /* | |
109 | * Validate supplied switch configuration. | |
110 | */ | |
111 | for (i = 0; i < ds->num_ports; i++) { | |
112 | char *name; | |
113 | ||
114 | name = cd->port_names[i]; | |
115 | if (name == NULL) | |
116 | continue; | |
117 | ||
118 | if (!strcmp(name, "cpu")) { | |
8b0d3ea5 | 119 | if (dst->cpu_dp) { |
6d3c8c0d | 120 | netdev_err(master, |
a6a71f19 VD |
121 | "multiple cpu ports?!\n"); |
122 | return -EINVAL; | |
123 | } | |
8b0d3ea5 | 124 | dst->cpu_dp = &ds->ports[i]; |
06d4d450 | 125 | dst->cpu_dp->netdev = master; |
a6a71f19 VD |
126 | ds->cpu_port_mask |= 1 << i; |
127 | } else if (!strcmp(name, "dsa")) { | |
128 | ds->dsa_port_mask |= 1 << i; | |
129 | } else { | |
130 | ds->enabled_port_mask |= 1 << i; | |
131 | } | |
132 | valid_name_found = true; | |
133 | } | |
134 | ||
135 | if (!valid_name_found && i == ds->num_ports) | |
136 | return -EINVAL; | |
137 | ||
138 | /* Make the built-in MII bus mask match the number of ports, | |
139 | * switch drivers can override this later | |
140 | */ | |
141 | ds->phys_mii_mask = ds->enabled_port_mask; | |
142 | ||
143 | /* | |
144 | * If the CPU connects to this switch, set the switch tree | |
145 | * tagging protocol to the preferred tagging format of this | |
146 | * switch. | |
147 | */ | |
8b0d3ea5 | 148 | if (dst->cpu_dp->ds == ds) { |
a6a71f19 VD |
149 | enum dsa_tag_protocol tag_protocol; |
150 | ||
151 | tag_protocol = ops->get_tag_protocol(ds); | |
152 | dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol); | |
153 | if (IS_ERR(dst->tag_ops)) | |
154 | return PTR_ERR(dst->tag_ops); | |
155 | ||
156 | dst->rcv = dst->tag_ops->rcv; | |
157 | } | |
158 | ||
159 | memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable)); | |
160 | ||
161 | /* | |
162 | * Do basic register setup. | |
163 | */ | |
164 | ret = ops->setup(ds); | |
165 | if (ret < 0) | |
166 | return ret; | |
167 | ||
168 | ret = dsa_switch_register_notifier(ds); | |
169 | if (ret) | |
170 | return ret; | |
171 | ||
172 | if (ops->set_addr) { | |
6d3c8c0d | 173 | ret = ops->set_addr(ds, master->dev_addr); |
a6a71f19 VD |
174 | if (ret < 0) |
175 | return ret; | |
176 | } | |
177 | ||
178 | if (!ds->slave_mii_bus && ops->phy_read) { | |
179 | ds->slave_mii_bus = devm_mdiobus_alloc(parent); | |
180 | if (!ds->slave_mii_bus) | |
181 | return -ENOMEM; | |
182 | dsa_slave_mii_bus_init(ds); | |
183 | ||
184 | ret = mdiobus_register(ds->slave_mii_bus); | |
185 | if (ret < 0) | |
186 | return ret; | |
187 | } | |
188 | ||
189 | /* | |
190 | * Create network devices for physical switch ports. | |
191 | */ | |
192 | for (i = 0; i < ds->num_ports; i++) { | |
193 | ds->ports[i].dn = cd->port_dn[i]; | |
06d4d450 | 194 | ds->ports[i].cpu_dp = dst->cpu_dp; |
a6a71f19 VD |
195 | |
196 | if (!(ds->enabled_port_mask & (1 << i))) | |
197 | continue; | |
198 | ||
199 | ret = dsa_slave_create(ds, parent, i, cd->port_names[i]); | |
200 | if (ret < 0) | |
6d3c8c0d | 201 | netdev_err(master, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
a6a71f19 VD |
202 | index, i, cd->port_names[i], ret); |
203 | } | |
204 | ||
205 | /* Perform configuration of the CPU and DSA ports */ | |
206 | ret = dsa_cpu_dsa_setups(ds, parent); | |
207 | if (ret < 0) | |
6d3c8c0d | 208 | netdev_err(master, "[%d] : can't configure CPU and DSA ports\n", |
a6a71f19 VD |
209 | index); |
210 | ||
937c7df8 | 211 | ret = dsa_cpu_port_ethtool_setup(ds->dst->cpu_dp); |
a6a71f19 VD |
212 | if (ret) |
213 | return ret; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | static struct dsa_switch * | |
06d4d450 FF |
219 | dsa_switch_setup(struct dsa_switch_tree *dst, struct net_device *master, |
220 | int index, struct device *parent, struct device *host_dev) | |
a6a71f19 VD |
221 | { |
222 | struct dsa_chip_data *cd = dst->pd->chip + index; | |
223 | const struct dsa_switch_ops *ops; | |
224 | struct dsa_switch *ds; | |
225 | int ret; | |
226 | const char *name; | |
227 | void *priv; | |
228 | ||
229 | /* | |
230 | * Probe for switch model. | |
231 | */ | |
232 | ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv); | |
233 | if (!ops) { | |
6d3c8c0d | 234 | netdev_err(master, "[%d]: could not detect attached switch\n", |
a6a71f19 VD |
235 | index); |
236 | return ERR_PTR(-EINVAL); | |
237 | } | |
6d3c8c0d | 238 | netdev_info(master, "[%d]: detected a %s switch\n", |
a6a71f19 VD |
239 | index, name); |
240 | ||
241 | ||
242 | /* | |
243 | * Allocate and initialise switch state. | |
244 | */ | |
245 | ds = dsa_switch_alloc(parent, DSA_MAX_PORTS); | |
246 | if (!ds) | |
247 | return ERR_PTR(-ENOMEM); | |
248 | ||
249 | ds->dst = dst; | |
250 | ds->index = index; | |
251 | ds->cd = cd; | |
252 | ds->ops = ops; | |
253 | ds->priv = priv; | |
254 | ||
06d4d450 | 255 | ret = dsa_switch_setup_one(ds, master, parent); |
a6a71f19 VD |
256 | if (ret) |
257 | return ERR_PTR(ret); | |
258 | ||
259 | return ds; | |
260 | } | |
261 | ||
262 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
263 | { | |
264 | int port; | |
265 | ||
266 | /* Destroy network devices for physical switch ports. */ | |
267 | for (port = 0; port < ds->num_ports; port++) { | |
268 | if (!(ds->enabled_port_mask & (1 << port))) | |
269 | continue; | |
270 | ||
271 | if (!ds->ports[port].netdev) | |
272 | continue; | |
273 | ||
274 | dsa_slave_destroy(ds->ports[port].netdev); | |
275 | } | |
276 | ||
277 | /* Disable configuration of the CPU and DSA ports */ | |
278 | for (port = 0; port < ds->num_ports; port++) { | |
279 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
280 | continue; | |
281 | dsa_cpu_dsa_destroy(&ds->ports[port]); | |
282 | ||
283 | /* Clearing a bit which is not set does no harm */ | |
284 | ds->cpu_port_mask |= ~(1 << port); | |
285 | ds->dsa_port_mask |= ~(1 << port); | |
286 | } | |
287 | ||
288 | if (ds->slave_mii_bus && ds->ops->phy_read) | |
289 | mdiobus_unregister(ds->slave_mii_bus); | |
290 | ||
291 | dsa_switch_unregister_notifier(ds); | |
292 | } | |
293 | ||
a6a71f19 VD |
294 | /* platform driver init and cleanup *****************************************/ |
295 | static int dev_is_class(struct device *dev, void *class) | |
296 | { | |
297 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
298 | return 1; | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | static struct device *dev_find_class(struct device *parent, char *class) | |
304 | { | |
305 | if (dev_is_class(parent, class)) { | |
306 | get_device(parent); | |
307 | return parent; | |
308 | } | |
309 | ||
310 | return device_find_child(parent, class, dev_is_class); | |
311 | } | |
312 | ||
313 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) | |
314 | { | |
315 | struct device *d; | |
316 | ||
317 | d = dev_find_class(dev, "mdio_bus"); | |
318 | if (d != NULL) { | |
319 | struct mii_bus *bus; | |
320 | ||
321 | bus = to_mii_bus(d); | |
322 | put_device(d); | |
323 | ||
324 | return bus; | |
325 | } | |
326 | ||
327 | return NULL; | |
328 | } | |
329 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); | |
330 | ||
331 | #ifdef CONFIG_OF | |
332 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
333 | struct dsa_chip_data *cd, | |
334 | int chip_index, int port_index, | |
335 | struct device_node *link) | |
336 | { | |
337 | const __be32 *reg; | |
338 | int link_sw_addr; | |
339 | struct device_node *parent_sw; | |
340 | int len; | |
341 | ||
342 | parent_sw = of_get_parent(link); | |
343 | if (!parent_sw) | |
344 | return -EINVAL; | |
345 | ||
346 | reg = of_get_property(parent_sw, "reg", &len); | |
347 | if (!reg || (len != sizeof(*reg) * 2)) | |
348 | return -EINVAL; | |
349 | ||
350 | /* | |
351 | * Get the destination switch number from the second field of its 'reg' | |
352 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
353 | */ | |
354 | link_sw_addr = be32_to_cpup(reg + 1); | |
355 | ||
356 | if (link_sw_addr >= pd->nr_chips) | |
357 | return -EINVAL; | |
358 | ||
359 | cd->rtable[link_sw_addr] = port_index; | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static int dsa_of_probe_links(struct dsa_platform_data *pd, | |
365 | struct dsa_chip_data *cd, | |
366 | int chip_index, int port_index, | |
367 | struct device_node *port, | |
368 | const char *port_name) | |
369 | { | |
370 | struct device_node *link; | |
371 | int link_index; | |
372 | int ret; | |
373 | ||
374 | for (link_index = 0;; link_index++) { | |
375 | link = of_parse_phandle(port, "link", link_index); | |
376 | if (!link) | |
377 | break; | |
378 | ||
379 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
380 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
381 | port_index, link); | |
382 | if (ret) | |
383 | return ret; | |
384 | } | |
385 | } | |
386 | return 0; | |
387 | } | |
388 | ||
389 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) | |
390 | { | |
391 | int i; | |
392 | int port_index; | |
393 | ||
394 | for (i = 0; i < pd->nr_chips; i++) { | |
395 | port_index = 0; | |
396 | while (port_index < DSA_MAX_PORTS) { | |
397 | kfree(pd->chip[i].port_names[port_index]); | |
398 | port_index++; | |
399 | } | |
400 | ||
401 | /* Drop our reference to the MDIO bus device */ | |
402 | if (pd->chip[i].host_dev) | |
403 | put_device(pd->chip[i].host_dev); | |
404 | } | |
405 | kfree(pd->chip); | |
406 | } | |
407 | ||
408 | static int dsa_of_probe(struct device *dev) | |
409 | { | |
410 | struct device_node *np = dev->of_node; | |
411 | struct device_node *child, *mdio, *ethernet, *port; | |
412 | struct mii_bus *mdio_bus, *mdio_bus_switch; | |
413 | struct net_device *ethernet_dev; | |
414 | struct dsa_platform_data *pd; | |
415 | struct dsa_chip_data *cd; | |
416 | const char *port_name; | |
417 | int chip_index, port_index; | |
418 | const unsigned int *sw_addr, *port_reg; | |
419 | u32 eeprom_len; | |
420 | int ret; | |
421 | ||
422 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
423 | if (!mdio) | |
424 | return -EINVAL; | |
425 | ||
426 | mdio_bus = of_mdio_find_bus(mdio); | |
427 | if (!mdio_bus) | |
428 | return -EPROBE_DEFER; | |
429 | ||
430 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
431 | if (!ethernet) { | |
432 | ret = -EINVAL; | |
433 | goto out_put_mdio; | |
434 | } | |
435 | ||
436 | ethernet_dev = of_find_net_device_by_node(ethernet); | |
437 | if (!ethernet_dev) { | |
438 | ret = -EPROBE_DEFER; | |
439 | goto out_put_mdio; | |
440 | } | |
441 | ||
442 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
443 | if (!pd) { | |
444 | ret = -ENOMEM; | |
445 | goto out_put_ethernet; | |
446 | } | |
447 | ||
448 | dev->platform_data = pd; | |
449 | pd->of_netdev = ethernet_dev; | |
450 | pd->nr_chips = of_get_available_child_count(np); | |
451 | if (pd->nr_chips > DSA_MAX_SWITCHES) | |
452 | pd->nr_chips = DSA_MAX_SWITCHES; | |
453 | ||
454 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), | |
455 | GFP_KERNEL); | |
456 | if (!pd->chip) { | |
457 | ret = -ENOMEM; | |
458 | goto out_free; | |
459 | } | |
460 | ||
461 | chip_index = -1; | |
462 | for_each_available_child_of_node(np, child) { | |
463 | int i; | |
464 | ||
465 | chip_index++; | |
466 | cd = &pd->chip[chip_index]; | |
467 | ||
468 | cd->of_node = child; | |
469 | ||
470 | /* Initialize the routing table */ | |
471 | for (i = 0; i < DSA_MAX_SWITCHES; ++i) | |
472 | cd->rtable[i] = DSA_RTABLE_NONE; | |
473 | ||
474 | /* When assigning the host device, increment its refcount */ | |
475 | cd->host_dev = get_device(&mdio_bus->dev); | |
476 | ||
477 | sw_addr = of_get_property(child, "reg", NULL); | |
478 | if (!sw_addr) | |
479 | continue; | |
480 | ||
481 | cd->sw_addr = be32_to_cpup(sw_addr); | |
482 | if (cd->sw_addr >= PHY_MAX_ADDR) | |
483 | continue; | |
484 | ||
485 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) | |
486 | cd->eeprom_len = eeprom_len; | |
487 | ||
488 | mdio = of_parse_phandle(child, "mii-bus", 0); | |
489 | if (mdio) { | |
490 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
491 | if (!mdio_bus_switch) { | |
492 | ret = -EPROBE_DEFER; | |
493 | goto out_free_chip; | |
494 | } | |
495 | ||
496 | /* Drop the mdio_bus device ref, replacing the host | |
497 | * device with the mdio_bus_switch device, keeping | |
498 | * the refcount from of_mdio_find_bus() above. | |
499 | */ | |
500 | put_device(cd->host_dev); | |
501 | cd->host_dev = &mdio_bus_switch->dev; | |
502 | } | |
503 | ||
504 | for_each_available_child_of_node(child, port) { | |
505 | port_reg = of_get_property(port, "reg", NULL); | |
506 | if (!port_reg) | |
507 | continue; | |
508 | ||
509 | port_index = be32_to_cpup(port_reg); | |
510 | if (port_index >= DSA_MAX_PORTS) | |
511 | break; | |
512 | ||
513 | port_name = of_get_property(port, "label", NULL); | |
514 | if (!port_name) | |
515 | continue; | |
516 | ||
517 | cd->port_dn[port_index] = port; | |
518 | ||
519 | cd->port_names[port_index] = kstrdup(port_name, | |
520 | GFP_KERNEL); | |
521 | if (!cd->port_names[port_index]) { | |
522 | ret = -ENOMEM; | |
523 | goto out_free_chip; | |
524 | } | |
525 | ||
526 | ret = dsa_of_probe_links(pd, cd, chip_index, | |
527 | port_index, port, port_name); | |
528 | if (ret) | |
529 | goto out_free_chip; | |
530 | ||
531 | } | |
532 | } | |
533 | ||
534 | /* The individual chips hold their own refcount on the mdio bus, | |
535 | * so drop ours */ | |
536 | put_device(&mdio_bus->dev); | |
537 | ||
538 | return 0; | |
539 | ||
540 | out_free_chip: | |
541 | dsa_of_free_platform_data(pd); | |
542 | out_free: | |
543 | kfree(pd); | |
544 | dev->platform_data = NULL; | |
545 | out_put_ethernet: | |
546 | put_device(ðernet_dev->dev); | |
547 | out_put_mdio: | |
548 | put_device(&mdio_bus->dev); | |
549 | return ret; | |
550 | } | |
551 | ||
552 | static void dsa_of_remove(struct device *dev) | |
553 | { | |
554 | struct dsa_platform_data *pd = dev->platform_data; | |
555 | ||
556 | if (!dev->of_node) | |
557 | return; | |
558 | ||
559 | dsa_of_free_platform_data(pd); | |
560 | put_device(&pd->of_netdev->dev); | |
561 | kfree(pd); | |
562 | } | |
563 | #else | |
564 | static inline int dsa_of_probe(struct device *dev) | |
565 | { | |
566 | return 0; | |
567 | } | |
568 | ||
569 | static inline void dsa_of_remove(struct device *dev) | |
570 | { | |
571 | } | |
572 | #endif | |
573 | ||
574 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, | |
575 | struct device *parent, struct dsa_platform_data *pd) | |
576 | { | |
577 | int i; | |
578 | unsigned configured = 0; | |
579 | ||
580 | dst->pd = pd; | |
a6a71f19 VD |
581 | |
582 | for (i = 0; i < pd->nr_chips; i++) { | |
583 | struct dsa_switch *ds; | |
584 | ||
06d4d450 | 585 | ds = dsa_switch_setup(dst, dev, i, parent, pd->chip[i].host_dev); |
a6a71f19 VD |
586 | if (IS_ERR(ds)) { |
587 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
588 | i, PTR_ERR(ds)); | |
589 | continue; | |
590 | } | |
591 | ||
592 | dst->ds[i] = ds; | |
593 | ||
594 | ++configured; | |
595 | } | |
596 | ||
597 | /* | |
598 | * If no switch was found, exit cleanly | |
599 | */ | |
600 | if (!configured) | |
601 | return -EPROBE_DEFER; | |
602 | ||
603 | /* | |
604 | * If we use a tagging format that doesn't have an ethertype | |
605 | * field, make sure that all packets from this point on get | |
606 | * sent to the tag format's receive function. | |
607 | */ | |
608 | wmb(); | |
02f840cb | 609 | dev->dsa_ptr = dst; |
a6a71f19 VD |
610 | |
611 | return 0; | |
612 | } | |
613 | ||
614 | static int dsa_probe(struct platform_device *pdev) | |
615 | { | |
616 | struct dsa_platform_data *pd = pdev->dev.platform_data; | |
617 | struct net_device *dev; | |
618 | struct dsa_switch_tree *dst; | |
619 | int ret; | |
620 | ||
621 | if (pdev->dev.of_node) { | |
622 | ret = dsa_of_probe(&pdev->dev); | |
623 | if (ret) | |
624 | return ret; | |
625 | ||
626 | pd = pdev->dev.platform_data; | |
627 | } | |
628 | ||
629 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) | |
630 | return -EINVAL; | |
631 | ||
632 | if (pd->of_netdev) { | |
633 | dev = pd->of_netdev; | |
634 | dev_hold(dev); | |
635 | } else { | |
636 | dev = dsa_dev_to_net_device(pd->netdev); | |
637 | } | |
638 | if (dev == NULL) { | |
639 | ret = -EPROBE_DEFER; | |
640 | goto out; | |
641 | } | |
642 | ||
643 | if (dev->dsa_ptr != NULL) { | |
644 | dev_put(dev); | |
645 | ret = -EEXIST; | |
646 | goto out; | |
647 | } | |
648 | ||
649 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); | |
650 | if (dst == NULL) { | |
651 | dev_put(dev); | |
652 | ret = -ENOMEM; | |
653 | goto out; | |
654 | } | |
655 | ||
656 | platform_set_drvdata(pdev, dst); | |
657 | ||
658 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); | |
659 | if (ret) { | |
660 | dev_put(dev); | |
661 | goto out; | |
662 | } | |
663 | ||
664 | return 0; | |
665 | ||
666 | out: | |
667 | dsa_of_remove(&pdev->dev); | |
668 | ||
669 | return ret; | |
670 | } | |
671 | ||
672 | static void dsa_remove_dst(struct dsa_switch_tree *dst) | |
673 | { | |
674 | int i; | |
675 | ||
6d3c8c0d | 676 | dst->cpu_dp->netdev->dsa_ptr = NULL; |
a6a71f19 VD |
677 | |
678 | /* If we used a tagging format that doesn't have an ethertype | |
679 | * field, make sure that all packets from this point get sent | |
680 | * without the tag and go through the regular receive path. | |
681 | */ | |
682 | wmb(); | |
683 | ||
684 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
685 | struct dsa_switch *ds = dst->ds[i]; | |
686 | ||
687 | if (ds) | |
688 | dsa_switch_destroy(ds); | |
689 | } | |
690 | ||
937c7df8 | 691 | dsa_cpu_port_ethtool_restore(dst->cpu_dp); |
a6a71f19 | 692 | |
6d3c8c0d | 693 | dev_put(dst->cpu_dp->netdev); |
a6a71f19 VD |
694 | } |
695 | ||
696 | static int dsa_remove(struct platform_device *pdev) | |
697 | { | |
698 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
699 | ||
700 | dsa_remove_dst(dst); | |
701 | dsa_of_remove(&pdev->dev); | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
706 | static void dsa_shutdown(struct platform_device *pdev) | |
707 | { | |
708 | } | |
709 | ||
710 | #ifdef CONFIG_PM_SLEEP | |
711 | static int dsa_suspend(struct device *d) | |
712 | { | |
713 | struct platform_device *pdev = to_platform_device(d); | |
714 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
715 | int i, ret = 0; | |
716 | ||
717 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
718 | struct dsa_switch *ds = dst->ds[i]; | |
719 | ||
720 | if (ds != NULL) | |
721 | ret = dsa_switch_suspend(ds); | |
722 | } | |
723 | ||
724 | return ret; | |
725 | } | |
726 | ||
727 | static int dsa_resume(struct device *d) | |
728 | { | |
729 | struct platform_device *pdev = to_platform_device(d); | |
730 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
731 | int i, ret = 0; | |
732 | ||
733 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
734 | struct dsa_switch *ds = dst->ds[i]; | |
735 | ||
736 | if (ds != NULL) | |
737 | ret = dsa_switch_resume(ds); | |
738 | } | |
739 | ||
740 | return ret; | |
741 | } | |
742 | #endif | |
743 | ||
744 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
745 | ||
746 | static const struct of_device_id dsa_of_match_table[] = { | |
747 | { .compatible = "marvell,dsa", }, | |
748 | {} | |
749 | }; | |
750 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
751 | ||
752 | static struct platform_driver dsa_driver = { | |
753 | .probe = dsa_probe, | |
754 | .remove = dsa_remove, | |
755 | .shutdown = dsa_shutdown, | |
756 | .driver = { | |
757 | .name = "dsa", | |
758 | .of_match_table = dsa_of_match_table, | |
759 | .pm = &dsa_pm_ops, | |
760 | }, | |
761 | }; | |
762 | ||
763 | int dsa_legacy_register(void) | |
764 | { | |
765 | return platform_driver_register(&dsa_driver); | |
766 | } | |
767 | ||
768 | void dsa_legacy_unregister(void) | |
769 | { | |
770 | platform_driver_unregister(&dsa_driver); | |
771 | } |