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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> | |
769a0202 | 23 | #include <linux/of_net.h> |
51579c3f | 24 | #include <linux/sysfs.h> |
cbc5d90b | 25 | #include <linux/phy_fixed.h> |
91da11f8 LB |
26 | #include "dsa_priv.h" |
27 | ||
28 | char dsa_driver_version[] = "0.1"; | |
29 | ||
30 | ||
31 | /* switch driver registration ***********************************************/ | |
32 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
33 | static LIST_HEAD(dsa_switch_drivers); | |
34 | ||
35 | void register_switch_driver(struct dsa_switch_driver *drv) | |
36 | { | |
37 | mutex_lock(&dsa_switch_drivers_mutex); | |
38 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
39 | mutex_unlock(&dsa_switch_drivers_mutex); | |
40 | } | |
ad293b8a | 41 | EXPORT_SYMBOL_GPL(register_switch_driver); |
91da11f8 LB |
42 | |
43 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
44 | { | |
45 | mutex_lock(&dsa_switch_drivers_mutex); | |
46 | list_del_init(&drv->list); | |
47 | mutex_unlock(&dsa_switch_drivers_mutex); | |
48 | } | |
ad293b8a | 49 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
91da11f8 LB |
50 | |
51 | static struct dsa_switch_driver * | |
b4d2394d | 52 | dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name) |
91da11f8 LB |
53 | { |
54 | struct dsa_switch_driver *ret; | |
55 | struct list_head *list; | |
56 | char *name; | |
57 | ||
58 | ret = NULL; | |
59 | name = NULL; | |
60 | ||
61 | mutex_lock(&dsa_switch_drivers_mutex); | |
62 | list_for_each(list, &dsa_switch_drivers) { | |
63 | struct dsa_switch_driver *drv; | |
64 | ||
65 | drv = list_entry(list, struct dsa_switch_driver, list); | |
66 | ||
b4d2394d | 67 | name = drv->probe(host_dev, sw_addr); |
91da11f8 LB |
68 | if (name != NULL) { |
69 | ret = drv; | |
70 | break; | |
71 | } | |
72 | } | |
73 | mutex_unlock(&dsa_switch_drivers_mutex); | |
74 | ||
75 | *_name = name; | |
76 | ||
77 | return ret; | |
78 | } | |
79 | ||
51579c3f GR |
80 | /* hwmon support ************************************************************/ |
81 | ||
82 | #ifdef CONFIG_NET_DSA_HWMON | |
83 | ||
84 | static ssize_t temp1_input_show(struct device *dev, | |
85 | struct device_attribute *attr, char *buf) | |
86 | { | |
87 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
88 | int temp, ret; | |
89 | ||
90 | ret = ds->drv->get_temp(ds, &temp); | |
91 | if (ret < 0) | |
92 | return ret; | |
93 | ||
94 | return sprintf(buf, "%d\n", temp * 1000); | |
95 | } | |
96 | static DEVICE_ATTR_RO(temp1_input); | |
97 | ||
98 | static ssize_t temp1_max_show(struct device *dev, | |
99 | struct device_attribute *attr, char *buf) | |
100 | { | |
101 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
102 | int temp, ret; | |
103 | ||
104 | ret = ds->drv->get_temp_limit(ds, &temp); | |
105 | if (ret < 0) | |
106 | return ret; | |
107 | ||
108 | return sprintf(buf, "%d\n", temp * 1000); | |
109 | } | |
110 | ||
111 | static ssize_t temp1_max_store(struct device *dev, | |
112 | struct device_attribute *attr, const char *buf, | |
113 | size_t count) | |
114 | { | |
115 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
116 | int temp, ret; | |
117 | ||
118 | ret = kstrtoint(buf, 0, &temp); | |
119 | if (ret < 0) | |
120 | return ret; | |
121 | ||
122 | ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000)); | |
123 | if (ret < 0) | |
124 | return ret; | |
125 | ||
126 | return count; | |
127 | } | |
e3122b7f | 128 | static DEVICE_ATTR_RW(temp1_max); |
51579c3f GR |
129 | |
130 | static ssize_t temp1_max_alarm_show(struct device *dev, | |
131 | struct device_attribute *attr, char *buf) | |
132 | { | |
133 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
134 | bool alarm; | |
135 | int ret; | |
136 | ||
137 | ret = ds->drv->get_temp_alarm(ds, &alarm); | |
138 | if (ret < 0) | |
139 | return ret; | |
140 | ||
141 | return sprintf(buf, "%d\n", alarm); | |
142 | } | |
143 | static DEVICE_ATTR_RO(temp1_max_alarm); | |
144 | ||
145 | static struct attribute *dsa_hwmon_attrs[] = { | |
146 | &dev_attr_temp1_input.attr, /* 0 */ | |
147 | &dev_attr_temp1_max.attr, /* 1 */ | |
148 | &dev_attr_temp1_max_alarm.attr, /* 2 */ | |
149 | NULL | |
150 | }; | |
151 | ||
152 | static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj, | |
153 | struct attribute *attr, int index) | |
154 | { | |
155 | struct device *dev = container_of(kobj, struct device, kobj); | |
156 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
157 | struct dsa_switch_driver *drv = ds->drv; | |
158 | umode_t mode = attr->mode; | |
159 | ||
160 | if (index == 1) { | |
161 | if (!drv->get_temp_limit) | |
162 | mode = 0; | |
e3122b7f VD |
163 | else if (!drv->set_temp_limit) |
164 | mode &= ~S_IWUSR; | |
51579c3f GR |
165 | } else if (index == 2 && !drv->get_temp_alarm) { |
166 | mode = 0; | |
167 | } | |
168 | return mode; | |
169 | } | |
170 | ||
171 | static const struct attribute_group dsa_hwmon_group = { | |
172 | .attrs = dsa_hwmon_attrs, | |
173 | .is_visible = dsa_hwmon_attrs_visible, | |
174 | }; | |
175 | __ATTRIBUTE_GROUPS(dsa_hwmon); | |
176 | ||
177 | #endif /* CONFIG_NET_DSA_HWMON */ | |
91da11f8 LB |
178 | |
179 | /* basic switch operations **************************************************/ | |
39b0c705 AL |
180 | static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master) |
181 | { | |
182 | struct dsa_chip_data *cd = ds->pd; | |
183 | struct device_node *port_dn; | |
184 | struct phy_device *phydev; | |
e4485346 | 185 | int ret, port, mode; |
39b0c705 AL |
186 | |
187 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
188 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
189 | continue; | |
190 | ||
191 | port_dn = cd->port_dn[port]; | |
192 | if (of_phy_is_fixed_link(port_dn)) { | |
193 | ret = of_phy_register_fixed_link(port_dn); | |
194 | if (ret) { | |
195 | netdev_err(master, | |
196 | "failed to register fixed PHY\n"); | |
197 | return ret; | |
198 | } | |
199 | phydev = of_phy_find_device(port_dn); | |
e4485346 AL |
200 | |
201 | mode = of_get_phy_mode(port_dn); | |
202 | if (mode < 0) | |
203 | mode = PHY_INTERFACE_MODE_NA; | |
204 | phydev->interface = mode; | |
205 | ||
39b0c705 AL |
206 | genphy_config_init(phydev); |
207 | genphy_read_status(phydev); | |
208 | if (ds->drv->adjust_link) | |
209 | ds->drv->adjust_link(ds, port, phydev); | |
210 | } | |
211 | } | |
212 | return 0; | |
213 | } | |
214 | ||
df197195 | 215 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 216 | { |
df197195 FF |
217 | struct dsa_switch_driver *drv = ds->drv; |
218 | struct dsa_switch_tree *dst = ds->dst; | |
219 | struct dsa_chip_data *pd = ds->pd; | |
f9bf5a2c | 220 | bool valid_name_found = false; |
df197195 FF |
221 | int index = ds->index; |
222 | int i, ret; | |
91da11f8 LB |
223 | |
224 | /* | |
225 | * Validate supplied switch configuration. | |
226 | */ | |
91da11f8 LB |
227 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
228 | char *name; | |
229 | ||
230 | name = pd->port_names[i]; | |
231 | if (name == NULL) | |
232 | continue; | |
233 | ||
234 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 235 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
236 | netdev_err(dst->master_netdev, |
237 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
238 | ret = -EINVAL; |
239 | goto out; | |
240 | } | |
e84665c9 LB |
241 | dst->cpu_switch = index; |
242 | dst->cpu_port = i; | |
243 | } else if (!strcmp(name, "dsa")) { | |
244 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 245 | } else { |
e84665c9 | 246 | ds->phys_port_mask |= 1 << i; |
91da11f8 | 247 | } |
f9bf5a2c | 248 | valid_name_found = true; |
91da11f8 LB |
249 | } |
250 | ||
f9bf5a2c FF |
251 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
252 | ret = -EINVAL; | |
253 | goto out; | |
254 | } | |
91da11f8 | 255 | |
0d8bcdd3 FF |
256 | /* Make the built-in MII bus mask match the number of ports, |
257 | * switch drivers can override this later | |
258 | */ | |
259 | ds->phys_mii_mask = ds->phys_port_mask; | |
260 | ||
91da11f8 | 261 | /* |
e84665c9 LB |
262 | * If the CPU connects to this switch, set the switch tree |
263 | * tagging protocol to the preferred tagging format of this | |
264 | * switch. | |
91da11f8 | 265 | */ |
5075314e | 266 | if (dst->cpu_switch == index) { |
59299031 | 267 | switch (ds->tag_protocol) { |
5075314e AD |
268 | #ifdef CONFIG_NET_DSA_TAG_DSA |
269 | case DSA_TAG_PROTO_DSA: | |
270 | dst->rcv = dsa_netdev_ops.rcv; | |
271 | break; | |
272 | #endif | |
273 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
274 | case DSA_TAG_PROTO_EDSA: | |
275 | dst->rcv = edsa_netdev_ops.rcv; | |
276 | break; | |
277 | #endif | |
278 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
279 | case DSA_TAG_PROTO_TRAILER: | |
280 | dst->rcv = trailer_netdev_ops.rcv; | |
281 | break; | |
282 | #endif | |
283 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
284 | case DSA_TAG_PROTO_BRCM: | |
285 | dst->rcv = brcm_netdev_ops.rcv; | |
286 | break; | |
287 | #endif | |
ae439286 | 288 | case DSA_TAG_PROTO_NONE: |
5075314e | 289 | break; |
ae439286 AL |
290 | default: |
291 | ret = -ENOPROTOOPT; | |
292 | goto out; | |
5075314e | 293 | } |
91da11f8 | 294 | |
59299031 | 295 | dst->tag_protocol = ds->tag_protocol; |
5075314e | 296 | } |
91da11f8 LB |
297 | |
298 | /* | |
299 | * Do basic register setup. | |
300 | */ | |
301 | ret = drv->setup(ds); | |
302 | if (ret < 0) | |
303 | goto out; | |
304 | ||
e84665c9 | 305 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
306 | if (ret < 0) |
307 | goto out; | |
308 | ||
d4ac35d6 | 309 | ds->slave_mii_bus = devm_mdiobus_alloc(parent); |
91da11f8 LB |
310 | if (ds->slave_mii_bus == NULL) { |
311 | ret = -ENOMEM; | |
312 | goto out; | |
313 | } | |
314 | dsa_slave_mii_bus_init(ds); | |
315 | ||
316 | ret = mdiobus_register(ds->slave_mii_bus); | |
317 | if (ret < 0) | |
d4ac35d6 | 318 | goto out; |
91da11f8 LB |
319 | |
320 | ||
321 | /* | |
322 | * Create network devices for physical switch ports. | |
323 | */ | |
91da11f8 | 324 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
e84665c9 | 325 | if (!(ds->phys_port_mask & (1 << i))) |
91da11f8 LB |
326 | continue; |
327 | ||
d87d6f44 GR |
328 | ret = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
329 | if (ret < 0) { | |
a2ae6007 JP |
330 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s)\n", |
331 | index, i, pd->port_names[i]); | |
d87d6f44 | 332 | ret = 0; |
91da11f8 | 333 | } |
91da11f8 LB |
334 | } |
335 | ||
39b0c705 AL |
336 | /* Perform configuration of the CPU and DSA ports */ |
337 | ret = dsa_cpu_dsa_setup(ds, dst->master_netdev); | |
338 | if (ret < 0) { | |
339 | netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n", | |
340 | index); | |
341 | ret = 0; | |
342 | } | |
343 | ||
51579c3f GR |
344 | #ifdef CONFIG_NET_DSA_HWMON |
345 | /* If the switch provides a temperature sensor, | |
346 | * register with hardware monitoring subsystem. | |
347 | * Treat registration error as non-fatal and ignore it. | |
348 | */ | |
349 | if (drv->get_temp) { | |
350 | const char *netname = netdev_name(dst->master_netdev); | |
351 | char hname[IFNAMSIZ + 1]; | |
352 | int i, j; | |
353 | ||
354 | /* Create valid hwmon 'name' attribute */ | |
355 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
356 | if (isalnum(netname[i])) | |
357 | hname[j++] = netname[i]; | |
358 | } | |
359 | hname[j] = '\0'; | |
360 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
361 | hname, index); | |
362 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
363 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
364 | if (IS_ERR(ds->hwmon_dev)) | |
365 | ds->hwmon_dev = NULL; | |
366 | } | |
367 | #endif /* CONFIG_NET_DSA_HWMON */ | |
368 | ||
df197195 | 369 | return ret; |
91da11f8 | 370 | |
91da11f8 | 371 | out: |
df197195 FF |
372 | return ret; |
373 | } | |
374 | ||
375 | static struct dsa_switch * | |
376 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
377 | struct device *parent, struct device *host_dev) | |
378 | { | |
379 | struct dsa_chip_data *pd = dst->pd->chip + index; | |
380 | struct dsa_switch_driver *drv; | |
381 | struct dsa_switch *ds; | |
382 | int ret; | |
383 | char *name; | |
384 | ||
385 | /* | |
386 | * Probe for switch model. | |
387 | */ | |
388 | drv = dsa_switch_probe(host_dev, pd->sw_addr, &name); | |
389 | if (drv == NULL) { | |
390 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", | |
391 | index); | |
392 | return ERR_PTR(-EINVAL); | |
393 | } | |
394 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
395 | index, name); | |
396 | ||
397 | ||
398 | /* | |
399 | * Allocate and initialise switch state. | |
400 | */ | |
d4ac35d6 | 401 | ds = devm_kzalloc(parent, sizeof(*ds) + drv->priv_size, GFP_KERNEL); |
df197195 | 402 | if (ds == NULL) |
24595346 | 403 | return ERR_PTR(-ENOMEM); |
df197195 FF |
404 | |
405 | ds->dst = dst; | |
406 | ds->index = index; | |
407 | ds->pd = pd; | |
408 | ds->drv = drv; | |
59299031 | 409 | ds->tag_protocol = drv->tag_protocol; |
df197195 FF |
410 | ds->master_dev = host_dev; |
411 | ||
412 | ret = dsa_switch_setup_one(ds, parent); | |
413 | if (ret) | |
24595346 | 414 | return ERR_PTR(ret); |
df197195 FF |
415 | |
416 | return ds; | |
91da11f8 LB |
417 | } |
418 | ||
419 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
420 | { | |
cbc5d90b NA |
421 | struct device_node *port_dn; |
422 | struct phy_device *phydev; | |
423 | struct dsa_chip_data *cd = ds->pd; | |
424 | int port; | |
425 | ||
51579c3f GR |
426 | #ifdef CONFIG_NET_DSA_HWMON |
427 | if (ds->hwmon_dev) | |
428 | hwmon_device_unregister(ds->hwmon_dev); | |
429 | #endif | |
cbc5d90b NA |
430 | |
431 | /* Disable configuration of the CPU and DSA ports */ | |
432 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
433 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
434 | continue; | |
435 | ||
436 | port_dn = cd->port_dn[port]; | |
437 | if (of_phy_is_fixed_link(port_dn)) { | |
438 | phydev = of_phy_find_device(port_dn); | |
439 | if (phydev) { | |
440 | int addr = phydev->addr; | |
441 | ||
442 | phy_device_free(phydev); | |
443 | of_node_put(port_dn); | |
444 | fixed_phy_del(addr); | |
445 | } | |
446 | } | |
447 | } | |
448 | ||
449 | /* Destroy network devices for physical switch ports. */ | |
450 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
451 | if (!(ds->phys_port_mask & (1 << port))) | |
452 | continue; | |
453 | ||
454 | if (!ds->ports[port]) | |
455 | continue; | |
456 | ||
457 | unregister_netdev(ds->ports[port]); | |
458 | free_netdev(ds->ports[port]); | |
459 | } | |
460 | ||
e410ddb8 | 461 | mdiobus_unregister(ds->slave_mii_bus); |
91da11f8 LB |
462 | } |
463 | ||
e506d405 | 464 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
465 | static int dsa_switch_suspend(struct dsa_switch *ds) |
466 | { | |
467 | int i, ret = 0; | |
468 | ||
469 | /* Suspend slave network devices */ | |
470 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 471 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
472 | continue; |
473 | ||
474 | ret = dsa_slave_suspend(ds->ports[i]); | |
475 | if (ret) | |
476 | return ret; | |
477 | } | |
478 | ||
479 | if (ds->drv->suspend) | |
480 | ret = ds->drv->suspend(ds); | |
481 | ||
482 | return ret; | |
483 | } | |
484 | ||
485 | static int dsa_switch_resume(struct dsa_switch *ds) | |
486 | { | |
487 | int i, ret = 0; | |
488 | ||
489 | if (ds->drv->resume) | |
490 | ret = ds->drv->resume(ds); | |
491 | ||
492 | if (ret) | |
493 | return ret; | |
494 | ||
495 | /* Resume slave network devices */ | |
496 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 497 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
498 | continue; |
499 | ||
500 | ret = dsa_slave_resume(ds->ports[i]); | |
501 | if (ret) | |
502 | return ret; | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
e506d405 | 507 | #endif |
24462549 | 508 | |
91da11f8 LB |
509 | |
510 | /* link polling *************************************************************/ | |
511 | static void dsa_link_poll_work(struct work_struct *ugly) | |
512 | { | |
e84665c9 LB |
513 | struct dsa_switch_tree *dst; |
514 | int i; | |
515 | ||
516 | dst = container_of(ugly, struct dsa_switch_tree, link_poll_work); | |
91da11f8 | 517 | |
e84665c9 LB |
518 | for (i = 0; i < dst->pd->nr_chips; i++) { |
519 | struct dsa_switch *ds = dst->ds[i]; | |
91da11f8 | 520 | |
e84665c9 LB |
521 | if (ds != NULL && ds->drv->poll_link != NULL) |
522 | ds->drv->poll_link(ds); | |
523 | } | |
524 | ||
525 | mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ)); | |
91da11f8 LB |
526 | } |
527 | ||
e84665c9 | 528 | static void dsa_link_poll_timer(unsigned long _dst) |
91da11f8 | 529 | { |
e84665c9 | 530 | struct dsa_switch_tree *dst = (void *)_dst; |
91da11f8 | 531 | |
e84665c9 | 532 | schedule_work(&dst->link_poll_work); |
91da11f8 LB |
533 | } |
534 | ||
535 | ||
536 | /* platform driver init and cleanup *****************************************/ | |
537 | static int dev_is_class(struct device *dev, void *class) | |
538 | { | |
539 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
540 | return 1; | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | static struct device *dev_find_class(struct device *parent, char *class) | |
546 | { | |
547 | if (dev_is_class(parent, class)) { | |
548 | get_device(parent); | |
549 | return parent; | |
550 | } | |
551 | ||
552 | return device_find_child(parent, class, dev_is_class); | |
553 | } | |
554 | ||
b4d2394d | 555 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
556 | { |
557 | struct device *d; | |
558 | ||
559 | d = dev_find_class(dev, "mdio_bus"); | |
560 | if (d != NULL) { | |
561 | struct mii_bus *bus; | |
562 | ||
563 | bus = to_mii_bus(d); | |
564 | put_device(d); | |
565 | ||
566 | return bus; | |
567 | } | |
568 | ||
569 | return NULL; | |
570 | } | |
b4d2394d | 571 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
572 | |
573 | static struct net_device *dev_to_net_device(struct device *dev) | |
574 | { | |
575 | struct device *d; | |
576 | ||
577 | d = dev_find_class(dev, "net"); | |
578 | if (d != NULL) { | |
579 | struct net_device *nd; | |
580 | ||
581 | nd = to_net_dev(d); | |
582 | dev_hold(nd); | |
583 | put_device(d); | |
584 | ||
585 | return nd; | |
586 | } | |
587 | ||
588 | return NULL; | |
589 | } | |
590 | ||
5e95329b FF |
591 | #ifdef CONFIG_OF |
592 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
593 | struct dsa_chip_data *cd, | |
30303813 | 594 | int chip_index, int port_index, |
5e95329b FF |
595 | struct device_node *link) |
596 | { | |
5e95329b | 597 | const __be32 *reg; |
5e95329b FF |
598 | int link_sw_addr; |
599 | struct device_node *parent_sw; | |
600 | int len; | |
601 | ||
602 | parent_sw = of_get_parent(link); | |
603 | if (!parent_sw) | |
604 | return -EINVAL; | |
605 | ||
606 | reg = of_get_property(parent_sw, "reg", &len); | |
607 | if (!reg || (len != sizeof(*reg) * 2)) | |
608 | return -EINVAL; | |
609 | ||
30303813 PN |
610 | /* |
611 | * Get the destination switch number from the second field of its 'reg' | |
612 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
613 | */ | |
5e95329b FF |
614 | link_sw_addr = be32_to_cpup(reg + 1); |
615 | ||
616 | if (link_sw_addr >= pd->nr_chips) | |
617 | return -EINVAL; | |
618 | ||
619 | /* First time routing table allocation */ | |
620 | if (!cd->rtable) { | |
5bc4b46a FF |
621 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
622 | GFP_KERNEL); | |
5e95329b FF |
623 | if (!cd->rtable) |
624 | return -ENOMEM; | |
625 | ||
626 | /* default to no valid uplink/downlink */ | |
627 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
628 | } | |
629 | ||
30303813 | 630 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
631 | |
632 | return 0; | |
5e95329b FF |
633 | } |
634 | ||
1e72e6f8 AL |
635 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
636 | struct dsa_chip_data *cd, | |
637 | int chip_index, int port_index, | |
638 | struct device_node *port, | |
639 | const char *port_name) | |
640 | { | |
641 | struct device_node *link; | |
642 | int link_index; | |
643 | int ret; | |
644 | ||
645 | for (link_index = 0;; link_index++) { | |
646 | link = of_parse_phandle(port, "link", link_index); | |
647 | if (!link) | |
648 | break; | |
649 | ||
650 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
651 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
652 | port_index, link); | |
653 | if (ret) | |
654 | return ret; | |
655 | } | |
656 | } | |
657 | return 0; | |
658 | } | |
659 | ||
21168245 FF |
660 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
661 | { | |
662 | int i; | |
663 | int port_index; | |
664 | ||
665 | for (i = 0; i < pd->nr_chips; i++) { | |
666 | port_index = 0; | |
5f64a7db | 667 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 668 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
669 | port_index++; |
670 | } | |
21168245 | 671 | kfree(pd->chip[i].rtable); |
e496ae69 RK |
672 | |
673 | /* Drop our reference to the MDIO bus device */ | |
674 | if (pd->chip[i].host_dev) | |
675 | put_device(pd->chip[i].host_dev); | |
21168245 FF |
676 | } |
677 | kfree(pd->chip); | |
678 | } | |
679 | ||
f1a26a06 | 680 | static int dsa_of_probe(struct device *dev) |
5e95329b | 681 | { |
f1a26a06 | 682 | struct device_node *np = dev->of_node; |
1e72e6f8 | 683 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 684 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 685 | struct net_device *ethernet_dev; |
5e95329b FF |
686 | struct dsa_platform_data *pd; |
687 | struct dsa_chip_data *cd; | |
688 | const char *port_name; | |
689 | int chip_index, port_index; | |
690 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 691 | u32 eeprom_len; |
21168245 | 692 | int ret; |
5e95329b FF |
693 | |
694 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
695 | if (!mdio) | |
696 | return -EINVAL; | |
697 | ||
698 | mdio_bus = of_mdio_find_bus(mdio); | |
699 | if (!mdio_bus) | |
b324c07a | 700 | return -EPROBE_DEFER; |
5e95329b FF |
701 | |
702 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
e496ae69 RK |
703 | if (!ethernet) { |
704 | ret = -EINVAL; | |
705 | goto out_put_mdio; | |
706 | } | |
5e95329b | 707 | |
769a0202 | 708 | ethernet_dev = of_find_net_device_by_node(ethernet); |
e496ae69 RK |
709 | if (!ethernet_dev) { |
710 | ret = -EPROBE_DEFER; | |
711 | goto out_put_mdio; | |
712 | } | |
5e95329b FF |
713 | |
714 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
e496ae69 RK |
715 | if (!pd) { |
716 | ret = -ENOMEM; | |
9861f720 | 717 | goto out_put_ethernet; |
e496ae69 | 718 | } |
5e95329b | 719 | |
f1a26a06 | 720 | dev->platform_data = pd; |
769a0202 | 721 | pd->of_netdev = ethernet_dev; |
e04449fc | 722 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
723 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
724 | pd->nr_chips = DSA_MAX_SWITCHES; | |
725 | ||
6f2aed6a FF |
726 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
727 | GFP_KERNEL); | |
5e95329b FF |
728 | if (!pd->chip) { |
729 | ret = -ENOMEM; | |
730 | goto out_free; | |
731 | } | |
732 | ||
d1c0b471 | 733 | chip_index = -1; |
5e95329b | 734 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 735 | chip_index++; |
5e95329b FF |
736 | cd = &pd->chip[chip_index]; |
737 | ||
fa981d9a | 738 | cd->of_node = child; |
e496ae69 RK |
739 | |
740 | /* When assigning the host device, increment its refcount */ | |
741 | cd->host_dev = get_device(&mdio_bus->dev); | |
5e95329b FF |
742 | |
743 | sw_addr = of_get_property(child, "reg", NULL); | |
744 | if (!sw_addr) | |
745 | continue; | |
746 | ||
747 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 748 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
749 | continue; |
750 | ||
50d4964f | 751 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
752 | cd->eeprom_len = eeprom_len; |
753 | ||
6bc6d0a8 AL |
754 | mdio = of_parse_phandle(child, "mii-bus", 0); |
755 | if (mdio) { | |
756 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
757 | if (!mdio_bus_switch) { | |
758 | ret = -EPROBE_DEFER; | |
759 | goto out_free_chip; | |
760 | } | |
e496ae69 RK |
761 | |
762 | /* Drop the mdio_bus device ref, replacing the host | |
763 | * device with the mdio_bus_switch device, keeping | |
764 | * the refcount from of_mdio_find_bus() above. | |
765 | */ | |
766 | put_device(cd->host_dev); | |
6bc6d0a8 AL |
767 | cd->host_dev = &mdio_bus_switch->dev; |
768 | } | |
769 | ||
5e95329b FF |
770 | for_each_available_child_of_node(child, port) { |
771 | port_reg = of_get_property(port, "reg", NULL); | |
772 | if (!port_reg) | |
773 | continue; | |
774 | ||
775 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
776 | if (port_index >= DSA_MAX_PORTS) |
777 | break; | |
5e95329b FF |
778 | |
779 | port_name = of_get_property(port, "label", NULL); | |
780 | if (!port_name) | |
781 | continue; | |
782 | ||
bd47497a FF |
783 | cd->port_dn[port_index] = port; |
784 | ||
5e95329b FF |
785 | cd->port_names[port_index] = kstrdup(port_name, |
786 | GFP_KERNEL); | |
787 | if (!cd->port_names[port_index]) { | |
788 | ret = -ENOMEM; | |
789 | goto out_free_chip; | |
790 | } | |
791 | ||
1e72e6f8 AL |
792 | ret = dsa_of_probe_links(pd, cd, chip_index, |
793 | port_index, port, port_name); | |
794 | if (ret) | |
795 | goto out_free_chip; | |
5e95329b | 796 | |
5e95329b FF |
797 | } |
798 | } | |
799 | ||
e496ae69 RK |
800 | /* The individual chips hold their own refcount on the mdio bus, |
801 | * so drop ours */ | |
802 | put_device(&mdio_bus->dev); | |
803 | ||
5e95329b FF |
804 | return 0; |
805 | ||
806 | out_free_chip: | |
21168245 | 807 | dsa_of_free_platform_data(pd); |
5e95329b FF |
808 | out_free: |
809 | kfree(pd); | |
f1a26a06 | 810 | dev->platform_data = NULL; |
9861f720 RK |
811 | out_put_ethernet: |
812 | put_device(ðernet_dev->dev); | |
e496ae69 RK |
813 | out_put_mdio: |
814 | put_device(&mdio_bus->dev); | |
5e95329b FF |
815 | return ret; |
816 | } | |
817 | ||
f1a26a06 | 818 | static void dsa_of_remove(struct device *dev) |
5e95329b | 819 | { |
f1a26a06 | 820 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 821 | |
f1a26a06 | 822 | if (!dev->of_node) |
5e95329b FF |
823 | return; |
824 | ||
21168245 | 825 | dsa_of_free_platform_data(pd); |
9861f720 | 826 | put_device(&pd->of_netdev->dev); |
5e95329b FF |
827 | kfree(pd); |
828 | } | |
829 | #else | |
f1a26a06 | 830 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
831 | { |
832 | return 0; | |
833 | } | |
834 | ||
f1a26a06 | 835 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
836 | { |
837 | } | |
838 | #endif | |
839 | ||
4d7f3e75 NA |
840 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
841 | struct device *parent, struct dsa_platform_data *pd) | |
c86e59b9 FF |
842 | { |
843 | int i; | |
4d7f3e75 | 844 | unsigned configured = 0; |
c86e59b9 FF |
845 | |
846 | dst->pd = pd; | |
847 | dst->master_netdev = dev; | |
848 | dst->cpu_switch = -1; | |
849 | dst->cpu_port = -1; | |
850 | ||
851 | for (i = 0; i < pd->nr_chips; i++) { | |
852 | struct dsa_switch *ds; | |
853 | ||
854 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
855 | if (IS_ERR(ds)) { | |
856 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
857 | i, PTR_ERR(ds)); | |
858 | continue; | |
859 | } | |
860 | ||
861 | dst->ds[i] = ds; | |
862 | if (ds->drv->poll_link != NULL) | |
863 | dst->link_poll_needed = 1; | |
4d7f3e75 NA |
864 | |
865 | ++configured; | |
c86e59b9 FF |
866 | } |
867 | ||
4d7f3e75 NA |
868 | /* |
869 | * If no switch was found, exit cleanly | |
870 | */ | |
871 | if (!configured) | |
872 | return -EPROBE_DEFER; | |
873 | ||
c86e59b9 FF |
874 | /* |
875 | * If we use a tagging format that doesn't have an ethertype | |
876 | * field, make sure that all packets from this point on get | |
877 | * sent to the tag format's receive function. | |
878 | */ | |
879 | wmb(); | |
880 | dev->dsa_ptr = (void *)dst; | |
881 | ||
882 | if (dst->link_poll_needed) { | |
883 | INIT_WORK(&dst->link_poll_work, dsa_link_poll_work); | |
884 | init_timer(&dst->link_poll_timer); | |
885 | dst->link_poll_timer.data = (unsigned long)dst; | |
886 | dst->link_poll_timer.function = dsa_link_poll_timer; | |
887 | dst->link_poll_timer.expires = round_jiffies(jiffies + HZ); | |
888 | add_timer(&dst->link_poll_timer); | |
889 | } | |
4d7f3e75 NA |
890 | |
891 | return 0; | |
c86e59b9 FF |
892 | } |
893 | ||
91da11f8 LB |
894 | static int dsa_probe(struct platform_device *pdev) |
895 | { | |
91da11f8 LB |
896 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
897 | struct net_device *dev; | |
e84665c9 | 898 | struct dsa_switch_tree *dst; |
c86e59b9 | 899 | int ret; |
91da11f8 | 900 | |
a2ae6007 JP |
901 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
902 | dsa_driver_version); | |
91da11f8 | 903 | |
5e95329b | 904 | if (pdev->dev.of_node) { |
f1a26a06 | 905 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
906 | if (ret) |
907 | return ret; | |
908 | ||
909 | pd = pdev->dev.platform_data; | |
910 | } | |
911 | ||
769a0202 | 912 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
913 | return -EINVAL; |
914 | ||
769a0202 FF |
915 | if (pd->of_netdev) { |
916 | dev = pd->of_netdev; | |
917 | dev_hold(dev); | |
918 | } else { | |
919 | dev = dev_to_net_device(pd->netdev); | |
920 | } | |
5e95329b | 921 | if (dev == NULL) { |
b324c07a | 922 | ret = -EPROBE_DEFER; |
5e95329b FF |
923 | goto out; |
924 | } | |
91da11f8 LB |
925 | |
926 | if (dev->dsa_ptr != NULL) { | |
927 | dev_put(dev); | |
5e95329b FF |
928 | ret = -EEXIST; |
929 | goto out; | |
91da11f8 LB |
930 | } |
931 | ||
d4ac35d6 | 932 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); |
e84665c9 | 933 | if (dst == NULL) { |
91da11f8 | 934 | dev_put(dev); |
5e95329b FF |
935 | ret = -ENOMEM; |
936 | goto out; | |
91da11f8 LB |
937 | } |
938 | ||
e84665c9 LB |
939 | platform_set_drvdata(pdev, dst); |
940 | ||
4d7f3e75 NA |
941 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); |
942 | if (ret) | |
943 | goto out; | |
91da11f8 LB |
944 | |
945 | return 0; | |
5e95329b FF |
946 | |
947 | out: | |
f1a26a06 | 948 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
949 | |
950 | return ret; | |
91da11f8 LB |
951 | } |
952 | ||
c86e59b9 | 953 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 954 | { |
e84665c9 | 955 | int i; |
91da11f8 | 956 | |
e84665c9 LB |
957 | if (dst->link_poll_needed) |
958 | del_timer_sync(&dst->link_poll_timer); | |
91da11f8 | 959 | |
43829731 | 960 | flush_work(&dst->link_poll_work); |
91da11f8 | 961 | |
e84665c9 LB |
962 | for (i = 0; i < dst->pd->nr_chips; i++) { |
963 | struct dsa_switch *ds = dst->ds[i]; | |
964 | ||
d4ac35d6 | 965 | if (ds) |
e84665c9 LB |
966 | dsa_switch_destroy(ds); |
967 | } | |
c86e59b9 FF |
968 | } |
969 | ||
970 | static int dsa_remove(struct platform_device *pdev) | |
971 | { | |
972 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 973 | |
c86e59b9 | 974 | dsa_remove_dst(dst); |
f1a26a06 | 975 | dsa_of_remove(&pdev->dev); |
5e95329b | 976 | |
91da11f8 LB |
977 | return 0; |
978 | } | |
979 | ||
980 | static void dsa_shutdown(struct platform_device *pdev) | |
981 | { | |
982 | } | |
983 | ||
3e8a72d1 FF |
984 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
985 | struct packet_type *pt, struct net_device *orig_dev) | |
986 | { | |
987 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
988 | ||
989 | if (unlikely(dst == NULL)) { | |
990 | kfree_skb(skb); | |
991 | return 0; | |
992 | } | |
993 | ||
5075314e | 994 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
995 | } |
996 | ||
61b7363f | 997 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
998 | .type = cpu_to_be16(ETH_P_XDSA), |
999 | .func = dsa_switch_rcv, | |
1000 | }; | |
1001 | ||
b73adef6 FF |
1002 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
1003 | .notifier_call = dsa_slave_netdevice_event, | |
1004 | }; | |
1005 | ||
24462549 FF |
1006 | #ifdef CONFIG_PM_SLEEP |
1007 | static int dsa_suspend(struct device *d) | |
1008 | { | |
1009 | struct platform_device *pdev = to_platform_device(d); | |
1010 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
1011 | int i, ret = 0; | |
1012 | ||
1013 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
1014 | struct dsa_switch *ds = dst->ds[i]; | |
1015 | ||
1016 | if (ds != NULL) | |
1017 | ret = dsa_switch_suspend(ds); | |
1018 | } | |
1019 | ||
1020 | return ret; | |
1021 | } | |
1022 | ||
1023 | static int dsa_resume(struct device *d) | |
1024 | { | |
1025 | struct platform_device *pdev = to_platform_device(d); | |
1026 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
1027 | int i, ret = 0; | |
1028 | ||
1029 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
1030 | struct dsa_switch *ds = dst->ds[i]; | |
1031 | ||
1032 | if (ds != NULL) | |
1033 | ret = dsa_switch_resume(ds); | |
1034 | } | |
1035 | ||
1036 | return ret; | |
1037 | } | |
1038 | #endif | |
1039 | ||
1040 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
1041 | ||
5e95329b | 1042 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 1043 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
1044 | { .compatible = "marvell,dsa", }, |
1045 | {} | |
1046 | }; | |
1047 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
1048 | ||
91da11f8 LB |
1049 | static struct platform_driver dsa_driver = { |
1050 | .probe = dsa_probe, | |
1051 | .remove = dsa_remove, | |
1052 | .shutdown = dsa_shutdown, | |
1053 | .driver = { | |
1054 | .name = "dsa", | |
5e95329b | 1055 | .of_match_table = dsa_of_match_table, |
24462549 | 1056 | .pm = &dsa_pm_ops, |
91da11f8 LB |
1057 | }, |
1058 | }; | |
1059 | ||
1060 | static int __init dsa_init_module(void) | |
1061 | { | |
7df899c3 BH |
1062 | int rc; |
1063 | ||
b73adef6 FF |
1064 | register_netdevice_notifier(&dsa_netdevice_nb); |
1065 | ||
7df899c3 BH |
1066 | rc = platform_driver_register(&dsa_driver); |
1067 | if (rc) | |
1068 | return rc; | |
1069 | ||
3e8a72d1 FF |
1070 | dev_add_pack(&dsa_pack_type); |
1071 | ||
7df899c3 | 1072 | return 0; |
91da11f8 LB |
1073 | } |
1074 | module_init(dsa_init_module); | |
1075 | ||
1076 | static void __exit dsa_cleanup_module(void) | |
1077 | { | |
b73adef6 | 1078 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 1079 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
1080 | platform_driver_unregister(&dsa_driver); |
1081 | } | |
1082 | module_exit(dsa_cleanup_module); | |
1083 | ||
577d6a7c | 1084 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
1085 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
1086 | MODULE_LICENSE("GPL"); | |
1087 | MODULE_ALIAS("platform:dsa"); |