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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> |
cc30c163 | 24 | #include <linux/of_gpio.h> |
51579c3f | 25 | #include <linux/sysfs.h> |
cbc5d90b | 26 | #include <linux/phy_fixed.h> |
85beabfe | 27 | #include <linux/gpio/consumer.h> |
91da11f8 LB |
28 | #include "dsa_priv.h" |
29 | ||
30 | char dsa_driver_version[] = "0.1"; | |
31 | ||
32 | ||
33 | /* switch driver registration ***********************************************/ | |
34 | static DEFINE_MUTEX(dsa_switch_drivers_mutex); | |
35 | static LIST_HEAD(dsa_switch_drivers); | |
36 | ||
37 | void register_switch_driver(struct dsa_switch_driver *drv) | |
38 | { | |
39 | mutex_lock(&dsa_switch_drivers_mutex); | |
40 | list_add_tail(&drv->list, &dsa_switch_drivers); | |
41 | mutex_unlock(&dsa_switch_drivers_mutex); | |
42 | } | |
ad293b8a | 43 | EXPORT_SYMBOL_GPL(register_switch_driver); |
91da11f8 LB |
44 | |
45 | void unregister_switch_driver(struct dsa_switch_driver *drv) | |
46 | { | |
47 | mutex_lock(&dsa_switch_drivers_mutex); | |
48 | list_del_init(&drv->list); | |
49 | mutex_unlock(&dsa_switch_drivers_mutex); | |
50 | } | |
ad293b8a | 51 | EXPORT_SYMBOL_GPL(unregister_switch_driver); |
91da11f8 LB |
52 | |
53 | static struct dsa_switch_driver * | |
bbb8d793 | 54 | dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr, |
0209d144 | 55 | const char **_name, void **priv) |
91da11f8 LB |
56 | { |
57 | struct dsa_switch_driver *ret; | |
58 | struct list_head *list; | |
0209d144 | 59 | const char *name; |
91da11f8 LB |
60 | |
61 | ret = NULL; | |
62 | name = NULL; | |
63 | ||
64 | mutex_lock(&dsa_switch_drivers_mutex); | |
65 | list_for_each(list, &dsa_switch_drivers) { | |
66 | struct dsa_switch_driver *drv; | |
67 | ||
68 | drv = list_entry(list, struct dsa_switch_driver, list); | |
69 | ||
7543a6d5 | 70 | name = drv->probe(parent, host_dev, sw_addr, priv); |
91da11f8 LB |
71 | if (name != NULL) { |
72 | ret = drv; | |
73 | break; | |
74 | } | |
75 | } | |
76 | mutex_unlock(&dsa_switch_drivers_mutex); | |
77 | ||
78 | *_name = name; | |
79 | ||
80 | return ret; | |
81 | } | |
82 | ||
51579c3f GR |
83 | /* hwmon support ************************************************************/ |
84 | ||
85 | #ifdef CONFIG_NET_DSA_HWMON | |
86 | ||
87 | static ssize_t temp1_input_show(struct device *dev, | |
88 | struct device_attribute *attr, char *buf) | |
89 | { | |
90 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
91 | int temp, ret; | |
92 | ||
93 | ret = ds->drv->get_temp(ds, &temp); | |
94 | if (ret < 0) | |
95 | return ret; | |
96 | ||
97 | return sprintf(buf, "%d\n", temp * 1000); | |
98 | } | |
99 | static DEVICE_ATTR_RO(temp1_input); | |
100 | ||
101 | static ssize_t temp1_max_show(struct device *dev, | |
102 | struct device_attribute *attr, char *buf) | |
103 | { | |
104 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
105 | int temp, ret; | |
106 | ||
107 | ret = ds->drv->get_temp_limit(ds, &temp); | |
108 | if (ret < 0) | |
109 | return ret; | |
110 | ||
111 | return sprintf(buf, "%d\n", temp * 1000); | |
112 | } | |
113 | ||
114 | static ssize_t temp1_max_store(struct device *dev, | |
115 | struct device_attribute *attr, const char *buf, | |
116 | size_t count) | |
117 | { | |
118 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
119 | int temp, ret; | |
120 | ||
121 | ret = kstrtoint(buf, 0, &temp); | |
122 | if (ret < 0) | |
123 | return ret; | |
124 | ||
125 | ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000)); | |
126 | if (ret < 0) | |
127 | return ret; | |
128 | ||
129 | return count; | |
130 | } | |
e3122b7f | 131 | static DEVICE_ATTR_RW(temp1_max); |
51579c3f GR |
132 | |
133 | static ssize_t temp1_max_alarm_show(struct device *dev, | |
134 | struct device_attribute *attr, char *buf) | |
135 | { | |
136 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
137 | bool alarm; | |
138 | int ret; | |
139 | ||
140 | ret = ds->drv->get_temp_alarm(ds, &alarm); | |
141 | if (ret < 0) | |
142 | return ret; | |
143 | ||
144 | return sprintf(buf, "%d\n", alarm); | |
145 | } | |
146 | static DEVICE_ATTR_RO(temp1_max_alarm); | |
147 | ||
148 | static struct attribute *dsa_hwmon_attrs[] = { | |
149 | &dev_attr_temp1_input.attr, /* 0 */ | |
150 | &dev_attr_temp1_max.attr, /* 1 */ | |
151 | &dev_attr_temp1_max_alarm.attr, /* 2 */ | |
152 | NULL | |
153 | }; | |
154 | ||
155 | static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj, | |
156 | struct attribute *attr, int index) | |
157 | { | |
158 | struct device *dev = container_of(kobj, struct device, kobj); | |
159 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
160 | struct dsa_switch_driver *drv = ds->drv; | |
161 | umode_t mode = attr->mode; | |
162 | ||
163 | if (index == 1) { | |
164 | if (!drv->get_temp_limit) | |
165 | mode = 0; | |
e3122b7f VD |
166 | else if (!drv->set_temp_limit) |
167 | mode &= ~S_IWUSR; | |
51579c3f GR |
168 | } else if (index == 2 && !drv->get_temp_alarm) { |
169 | mode = 0; | |
170 | } | |
171 | return mode; | |
172 | } | |
173 | ||
174 | static const struct attribute_group dsa_hwmon_group = { | |
175 | .attrs = dsa_hwmon_attrs, | |
176 | .is_visible = dsa_hwmon_attrs_visible, | |
177 | }; | |
178 | __ATTRIBUTE_GROUPS(dsa_hwmon); | |
179 | ||
180 | #endif /* CONFIG_NET_DSA_HWMON */ | |
91da11f8 LB |
181 | |
182 | /* basic switch operations **************************************************/ | |
39b0c705 AL |
183 | static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master) |
184 | { | |
ff04955c | 185 | struct dsa_chip_data *cd = ds->cd; |
39b0c705 AL |
186 | struct device_node *port_dn; |
187 | struct phy_device *phydev; | |
e4485346 | 188 | int ret, port, mode; |
39b0c705 AL |
189 | |
190 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
191 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
192 | continue; | |
193 | ||
194 | port_dn = cd->port_dn[port]; | |
195 | if (of_phy_is_fixed_link(port_dn)) { | |
196 | ret = of_phy_register_fixed_link(port_dn); | |
197 | if (ret) { | |
198 | netdev_err(master, | |
199 | "failed to register fixed PHY\n"); | |
200 | return ret; | |
201 | } | |
202 | phydev = of_phy_find_device(port_dn); | |
e4485346 AL |
203 | |
204 | mode = of_get_phy_mode(port_dn); | |
205 | if (mode < 0) | |
206 | mode = PHY_INTERFACE_MODE_NA; | |
207 | phydev->interface = mode; | |
208 | ||
39b0c705 AL |
209 | genphy_config_init(phydev); |
210 | genphy_read_status(phydev); | |
211 | if (ds->drv->adjust_link) | |
212 | ds->drv->adjust_link(ds, port, phydev); | |
213 | } | |
214 | } | |
215 | return 0; | |
216 | } | |
217 | ||
df197195 | 218 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 219 | { |
df197195 FF |
220 | struct dsa_switch_driver *drv = ds->drv; |
221 | struct dsa_switch_tree *dst = ds->dst; | |
ff04955c | 222 | struct dsa_chip_data *cd = ds->cd; |
f9bf5a2c | 223 | bool valid_name_found = false; |
df197195 FF |
224 | int index = ds->index; |
225 | int i, ret; | |
91da11f8 LB |
226 | |
227 | /* | |
228 | * Validate supplied switch configuration. | |
229 | */ | |
91da11f8 LB |
230 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
231 | char *name; | |
232 | ||
ff04955c | 233 | name = cd->port_names[i]; |
91da11f8 LB |
234 | if (name == NULL) |
235 | continue; | |
236 | ||
237 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 238 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
239 | netdev_err(dst->master_netdev, |
240 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
241 | ret = -EINVAL; |
242 | goto out; | |
243 | } | |
e84665c9 LB |
244 | dst->cpu_switch = index; |
245 | dst->cpu_port = i; | |
246 | } else if (!strcmp(name, "dsa")) { | |
247 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 248 | } else { |
74c3e2a5 | 249 | ds->enabled_port_mask |= 1 << i; |
91da11f8 | 250 | } |
f9bf5a2c | 251 | valid_name_found = true; |
91da11f8 LB |
252 | } |
253 | ||
f9bf5a2c FF |
254 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
255 | ret = -EINVAL; | |
256 | goto out; | |
257 | } | |
91da11f8 | 258 | |
0d8bcdd3 FF |
259 | /* Make the built-in MII bus mask match the number of ports, |
260 | * switch drivers can override this later | |
261 | */ | |
74c3e2a5 | 262 | ds->phys_mii_mask = ds->enabled_port_mask; |
0d8bcdd3 | 263 | |
91da11f8 | 264 | /* |
e84665c9 LB |
265 | * If the CPU connects to this switch, set the switch tree |
266 | * tagging protocol to the preferred tagging format of this | |
267 | * switch. | |
91da11f8 | 268 | */ |
5075314e | 269 | if (dst->cpu_switch == index) { |
c60c9840 | 270 | switch (drv->tag_protocol) { |
5075314e AD |
271 | #ifdef CONFIG_NET_DSA_TAG_DSA |
272 | case DSA_TAG_PROTO_DSA: | |
273 | dst->rcv = dsa_netdev_ops.rcv; | |
274 | break; | |
275 | #endif | |
276 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
277 | case DSA_TAG_PROTO_EDSA: | |
278 | dst->rcv = edsa_netdev_ops.rcv; | |
279 | break; | |
280 | #endif | |
281 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
282 | case DSA_TAG_PROTO_TRAILER: | |
283 | dst->rcv = trailer_netdev_ops.rcv; | |
284 | break; | |
285 | #endif | |
286 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
287 | case DSA_TAG_PROTO_BRCM: | |
288 | dst->rcv = brcm_netdev_ops.rcv; | |
289 | break; | |
290 | #endif | |
ae439286 | 291 | case DSA_TAG_PROTO_NONE: |
5075314e | 292 | break; |
ae439286 AL |
293 | default: |
294 | ret = -ENOPROTOOPT; | |
295 | goto out; | |
5075314e | 296 | } |
91da11f8 | 297 | |
c60c9840 | 298 | dst->tag_protocol = drv->tag_protocol; |
5075314e | 299 | } |
91da11f8 LB |
300 | |
301 | /* | |
302 | * Do basic register setup. | |
303 | */ | |
304 | ret = drv->setup(ds); | |
305 | if (ret < 0) | |
306 | goto out; | |
307 | ||
e84665c9 | 308 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
309 | if (ret < 0) |
310 | goto out; | |
311 | ||
d4ac35d6 | 312 | ds->slave_mii_bus = devm_mdiobus_alloc(parent); |
91da11f8 LB |
313 | if (ds->slave_mii_bus == NULL) { |
314 | ret = -ENOMEM; | |
315 | goto out; | |
316 | } | |
317 | dsa_slave_mii_bus_init(ds); | |
318 | ||
319 | ret = mdiobus_register(ds->slave_mii_bus); | |
320 | if (ret < 0) | |
d4ac35d6 | 321 | goto out; |
91da11f8 LB |
322 | |
323 | ||
324 | /* | |
325 | * Create network devices for physical switch ports. | |
326 | */ | |
91da11f8 | 327 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
74c3e2a5 | 328 | if (!(ds->enabled_port_mask & (1 << i))) |
91da11f8 LB |
329 | continue; |
330 | ||
ff04955c | 331 | ret = dsa_slave_create(ds, parent, i, cd->port_names[i]); |
d87d6f44 | 332 | if (ret < 0) { |
d25b8e74 | 333 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
ff04955c | 334 | index, i, cd->port_names[i], ret); |
d87d6f44 | 335 | ret = 0; |
91da11f8 | 336 | } |
91da11f8 LB |
337 | } |
338 | ||
39b0c705 AL |
339 | /* Perform configuration of the CPU and DSA ports */ |
340 | ret = dsa_cpu_dsa_setup(ds, dst->master_netdev); | |
341 | if (ret < 0) { | |
342 | netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n", | |
343 | index); | |
344 | ret = 0; | |
345 | } | |
346 | ||
51579c3f GR |
347 | #ifdef CONFIG_NET_DSA_HWMON |
348 | /* If the switch provides a temperature sensor, | |
349 | * register with hardware monitoring subsystem. | |
350 | * Treat registration error as non-fatal and ignore it. | |
351 | */ | |
352 | if (drv->get_temp) { | |
353 | const char *netname = netdev_name(dst->master_netdev); | |
354 | char hname[IFNAMSIZ + 1]; | |
355 | int i, j; | |
356 | ||
357 | /* Create valid hwmon 'name' attribute */ | |
358 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
359 | if (isalnum(netname[i])) | |
360 | hname[j++] = netname[i]; | |
361 | } | |
362 | hname[j] = '\0'; | |
363 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
364 | hname, index); | |
365 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
366 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
367 | if (IS_ERR(ds->hwmon_dev)) | |
368 | ds->hwmon_dev = NULL; | |
369 | } | |
370 | #endif /* CONFIG_NET_DSA_HWMON */ | |
371 | ||
df197195 | 372 | return ret; |
91da11f8 | 373 | |
91da11f8 | 374 | out: |
df197195 FF |
375 | return ret; |
376 | } | |
377 | ||
378 | static struct dsa_switch * | |
379 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
380 | struct device *parent, struct device *host_dev) | |
381 | { | |
ff04955c | 382 | struct dsa_chip_data *cd = dst->pd->chip + index; |
df197195 FF |
383 | struct dsa_switch_driver *drv; |
384 | struct dsa_switch *ds; | |
385 | int ret; | |
0209d144 | 386 | const char *name; |
7543a6d5 | 387 | void *priv; |
df197195 FF |
388 | |
389 | /* | |
390 | * Probe for switch model. | |
391 | */ | |
ff04955c | 392 | drv = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv); |
df197195 FF |
393 | if (drv == NULL) { |
394 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", | |
395 | index); | |
396 | return ERR_PTR(-EINVAL); | |
397 | } | |
398 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
399 | index, name); | |
400 | ||
401 | ||
402 | /* | |
403 | * Allocate and initialise switch state. | |
404 | */ | |
5feebd0a | 405 | ds = devm_kzalloc(parent, sizeof(*ds), GFP_KERNEL); |
df197195 | 406 | if (ds == NULL) |
24595346 | 407 | return ERR_PTR(-ENOMEM); |
df197195 FF |
408 | |
409 | ds->dst = dst; | |
410 | ds->index = index; | |
ff04955c | 411 | ds->cd = cd; |
df197195 | 412 | ds->drv = drv; |
7543a6d5 | 413 | ds->priv = priv; |
c33063d6 | 414 | ds->dev = parent; |
df197195 FF |
415 | |
416 | ret = dsa_switch_setup_one(ds, parent); | |
417 | if (ret) | |
24595346 | 418 | return ERR_PTR(ret); |
df197195 FF |
419 | |
420 | return ds; | |
91da11f8 LB |
421 | } |
422 | ||
423 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
424 | { | |
cbc5d90b NA |
425 | struct device_node *port_dn; |
426 | struct phy_device *phydev; | |
ff04955c | 427 | struct dsa_chip_data *cd = ds->cd; |
cbc5d90b NA |
428 | int port; |
429 | ||
51579c3f GR |
430 | #ifdef CONFIG_NET_DSA_HWMON |
431 | if (ds->hwmon_dev) | |
432 | hwmon_device_unregister(ds->hwmon_dev); | |
433 | #endif | |
cbc5d90b | 434 | |
3a44514f AL |
435 | /* Destroy network devices for physical switch ports. */ |
436 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
74c3e2a5 | 437 | if (!(ds->enabled_port_mask & (1 << port))) |
3a44514f AL |
438 | continue; |
439 | ||
440 | if (!ds->ports[port]) | |
441 | continue; | |
442 | ||
443 | dsa_slave_destroy(ds->ports[port]); | |
444 | } | |
445 | ||
446 | /* Remove any fixed link PHYs */ | |
cbc5d90b | 447 | for (port = 0; port < DSA_MAX_PORTS; port++) { |
cbc5d90b NA |
448 | port_dn = cd->port_dn[port]; |
449 | if (of_phy_is_fixed_link(port_dn)) { | |
450 | phydev = of_phy_find_device(port_dn); | |
451 | if (phydev) { | |
cbc5d90b NA |
452 | phy_device_free(phydev); |
453 | of_node_put(port_dn); | |
5bcbe0f3 | 454 | fixed_phy_unregister(phydev); |
cbc5d90b NA |
455 | } |
456 | } | |
457 | } | |
458 | ||
e410ddb8 | 459 | mdiobus_unregister(ds->slave_mii_bus); |
91da11f8 LB |
460 | } |
461 | ||
e506d405 | 462 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
463 | static int dsa_switch_suspend(struct dsa_switch *ds) |
464 | { | |
465 | int i, ret = 0; | |
466 | ||
467 | /* Suspend slave network devices */ | |
468 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 469 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
470 | continue; |
471 | ||
472 | ret = dsa_slave_suspend(ds->ports[i]); | |
473 | if (ret) | |
474 | return ret; | |
475 | } | |
476 | ||
477 | if (ds->drv->suspend) | |
478 | ret = ds->drv->suspend(ds); | |
479 | ||
480 | return ret; | |
481 | } | |
482 | ||
483 | static int dsa_switch_resume(struct dsa_switch *ds) | |
484 | { | |
485 | int i, ret = 0; | |
486 | ||
487 | if (ds->drv->resume) | |
488 | ret = ds->drv->resume(ds); | |
489 | ||
490 | if (ret) | |
491 | return ret; | |
492 | ||
493 | /* Resume slave network devices */ | |
494 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 495 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
496 | continue; |
497 | ||
498 | ret = dsa_slave_resume(ds->ports[i]); | |
499 | if (ret) | |
500 | return ret; | |
501 | } | |
502 | ||
503 | return 0; | |
504 | } | |
e506d405 | 505 | #endif |
24462549 | 506 | |
91da11f8 LB |
507 | /* platform driver init and cleanup *****************************************/ |
508 | static int dev_is_class(struct device *dev, void *class) | |
509 | { | |
510 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
511 | return 1; | |
512 | ||
513 | return 0; | |
514 | } | |
515 | ||
516 | static struct device *dev_find_class(struct device *parent, char *class) | |
517 | { | |
518 | if (dev_is_class(parent, class)) { | |
519 | get_device(parent); | |
520 | return parent; | |
521 | } | |
522 | ||
523 | return device_find_child(parent, class, dev_is_class); | |
524 | } | |
525 | ||
b4d2394d | 526 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
527 | { |
528 | struct device *d; | |
529 | ||
530 | d = dev_find_class(dev, "mdio_bus"); | |
531 | if (d != NULL) { | |
532 | struct mii_bus *bus; | |
533 | ||
534 | bus = to_mii_bus(d); | |
535 | put_device(d); | |
536 | ||
537 | return bus; | |
538 | } | |
539 | ||
540 | return NULL; | |
541 | } | |
b4d2394d | 542 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
543 | |
544 | static struct net_device *dev_to_net_device(struct device *dev) | |
545 | { | |
546 | struct device *d; | |
547 | ||
548 | d = dev_find_class(dev, "net"); | |
549 | if (d != NULL) { | |
550 | struct net_device *nd; | |
551 | ||
552 | nd = to_net_dev(d); | |
553 | dev_hold(nd); | |
554 | put_device(d); | |
555 | ||
556 | return nd; | |
557 | } | |
558 | ||
559 | return NULL; | |
560 | } | |
561 | ||
5e95329b FF |
562 | #ifdef CONFIG_OF |
563 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
564 | struct dsa_chip_data *cd, | |
30303813 | 565 | int chip_index, int port_index, |
5e95329b FF |
566 | struct device_node *link) |
567 | { | |
5e95329b | 568 | const __be32 *reg; |
5e95329b FF |
569 | int link_sw_addr; |
570 | struct device_node *parent_sw; | |
571 | int len; | |
572 | ||
573 | parent_sw = of_get_parent(link); | |
574 | if (!parent_sw) | |
575 | return -EINVAL; | |
576 | ||
577 | reg = of_get_property(parent_sw, "reg", &len); | |
578 | if (!reg || (len != sizeof(*reg) * 2)) | |
579 | return -EINVAL; | |
580 | ||
30303813 PN |
581 | /* |
582 | * Get the destination switch number from the second field of its 'reg' | |
583 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
584 | */ | |
5e95329b FF |
585 | link_sw_addr = be32_to_cpup(reg + 1); |
586 | ||
587 | if (link_sw_addr >= pd->nr_chips) | |
588 | return -EINVAL; | |
589 | ||
590 | /* First time routing table allocation */ | |
591 | if (!cd->rtable) { | |
5bc4b46a FF |
592 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
593 | GFP_KERNEL); | |
5e95329b FF |
594 | if (!cd->rtable) |
595 | return -ENOMEM; | |
596 | ||
597 | /* default to no valid uplink/downlink */ | |
598 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
599 | } | |
600 | ||
30303813 | 601 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
602 | |
603 | return 0; | |
5e95329b FF |
604 | } |
605 | ||
1e72e6f8 AL |
606 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
607 | struct dsa_chip_data *cd, | |
608 | int chip_index, int port_index, | |
609 | struct device_node *port, | |
610 | const char *port_name) | |
611 | { | |
612 | struct device_node *link; | |
613 | int link_index; | |
614 | int ret; | |
615 | ||
616 | for (link_index = 0;; link_index++) { | |
617 | link = of_parse_phandle(port, "link", link_index); | |
618 | if (!link) | |
619 | break; | |
620 | ||
621 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
622 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
623 | port_index, link); | |
624 | if (ret) | |
625 | return ret; | |
626 | } | |
627 | } | |
628 | return 0; | |
629 | } | |
630 | ||
21168245 FF |
631 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
632 | { | |
633 | int i; | |
634 | int port_index; | |
635 | ||
636 | for (i = 0; i < pd->nr_chips; i++) { | |
637 | port_index = 0; | |
5f64a7db | 638 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 639 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
640 | port_index++; |
641 | } | |
21168245 | 642 | kfree(pd->chip[i].rtable); |
e496ae69 RK |
643 | |
644 | /* Drop our reference to the MDIO bus device */ | |
645 | if (pd->chip[i].host_dev) | |
646 | put_device(pd->chip[i].host_dev); | |
21168245 FF |
647 | } |
648 | kfree(pd->chip); | |
649 | } | |
650 | ||
f1a26a06 | 651 | static int dsa_of_probe(struct device *dev) |
5e95329b | 652 | { |
f1a26a06 | 653 | struct device_node *np = dev->of_node; |
1e72e6f8 | 654 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 655 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 656 | struct net_device *ethernet_dev; |
5e95329b FF |
657 | struct dsa_platform_data *pd; |
658 | struct dsa_chip_data *cd; | |
659 | const char *port_name; | |
660 | int chip_index, port_index; | |
661 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 662 | u32 eeprom_len; |
21168245 | 663 | int ret; |
5e95329b FF |
664 | |
665 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
666 | if (!mdio) | |
667 | return -EINVAL; | |
668 | ||
669 | mdio_bus = of_mdio_find_bus(mdio); | |
670 | if (!mdio_bus) | |
b324c07a | 671 | return -EPROBE_DEFER; |
5e95329b FF |
672 | |
673 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
e496ae69 RK |
674 | if (!ethernet) { |
675 | ret = -EINVAL; | |
676 | goto out_put_mdio; | |
677 | } | |
5e95329b | 678 | |
769a0202 | 679 | ethernet_dev = of_find_net_device_by_node(ethernet); |
e496ae69 RK |
680 | if (!ethernet_dev) { |
681 | ret = -EPROBE_DEFER; | |
682 | goto out_put_mdio; | |
683 | } | |
5e95329b FF |
684 | |
685 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
e496ae69 RK |
686 | if (!pd) { |
687 | ret = -ENOMEM; | |
9861f720 | 688 | goto out_put_ethernet; |
e496ae69 | 689 | } |
5e95329b | 690 | |
f1a26a06 | 691 | dev->platform_data = pd; |
769a0202 | 692 | pd->of_netdev = ethernet_dev; |
e04449fc | 693 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
694 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
695 | pd->nr_chips = DSA_MAX_SWITCHES; | |
696 | ||
6f2aed6a FF |
697 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
698 | GFP_KERNEL); | |
5e95329b FF |
699 | if (!pd->chip) { |
700 | ret = -ENOMEM; | |
701 | goto out_free; | |
702 | } | |
703 | ||
d1c0b471 | 704 | chip_index = -1; |
5e95329b | 705 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 706 | chip_index++; |
5e95329b FF |
707 | cd = &pd->chip[chip_index]; |
708 | ||
fa981d9a | 709 | cd->of_node = child; |
e496ae69 RK |
710 | |
711 | /* When assigning the host device, increment its refcount */ | |
712 | cd->host_dev = get_device(&mdio_bus->dev); | |
5e95329b FF |
713 | |
714 | sw_addr = of_get_property(child, "reg", NULL); | |
715 | if (!sw_addr) | |
716 | continue; | |
717 | ||
718 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 719 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
720 | continue; |
721 | ||
50d4964f | 722 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
723 | cd->eeprom_len = eeprom_len; |
724 | ||
6bc6d0a8 AL |
725 | mdio = of_parse_phandle(child, "mii-bus", 0); |
726 | if (mdio) { | |
727 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
728 | if (!mdio_bus_switch) { | |
729 | ret = -EPROBE_DEFER; | |
730 | goto out_free_chip; | |
731 | } | |
e496ae69 RK |
732 | |
733 | /* Drop the mdio_bus device ref, replacing the host | |
734 | * device with the mdio_bus_switch device, keeping | |
735 | * the refcount from of_mdio_find_bus() above. | |
736 | */ | |
737 | put_device(cd->host_dev); | |
6bc6d0a8 AL |
738 | cd->host_dev = &mdio_bus_switch->dev; |
739 | } | |
740 | ||
5e95329b FF |
741 | for_each_available_child_of_node(child, port) { |
742 | port_reg = of_get_property(port, "reg", NULL); | |
743 | if (!port_reg) | |
744 | continue; | |
745 | ||
746 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
747 | if (port_index >= DSA_MAX_PORTS) |
748 | break; | |
5e95329b FF |
749 | |
750 | port_name = of_get_property(port, "label", NULL); | |
751 | if (!port_name) | |
752 | continue; | |
753 | ||
bd47497a FF |
754 | cd->port_dn[port_index] = port; |
755 | ||
5e95329b FF |
756 | cd->port_names[port_index] = kstrdup(port_name, |
757 | GFP_KERNEL); | |
758 | if (!cd->port_names[port_index]) { | |
759 | ret = -ENOMEM; | |
760 | goto out_free_chip; | |
761 | } | |
762 | ||
1e72e6f8 AL |
763 | ret = dsa_of_probe_links(pd, cd, chip_index, |
764 | port_index, port, port_name); | |
765 | if (ret) | |
766 | goto out_free_chip; | |
5e95329b | 767 | |
5e95329b FF |
768 | } |
769 | } | |
770 | ||
e496ae69 RK |
771 | /* The individual chips hold their own refcount on the mdio bus, |
772 | * so drop ours */ | |
773 | put_device(&mdio_bus->dev); | |
774 | ||
5e95329b FF |
775 | return 0; |
776 | ||
777 | out_free_chip: | |
21168245 | 778 | dsa_of_free_platform_data(pd); |
5e95329b FF |
779 | out_free: |
780 | kfree(pd); | |
f1a26a06 | 781 | dev->platform_data = NULL; |
9861f720 RK |
782 | out_put_ethernet: |
783 | put_device(ðernet_dev->dev); | |
e496ae69 RK |
784 | out_put_mdio: |
785 | put_device(&mdio_bus->dev); | |
5e95329b FF |
786 | return ret; |
787 | } | |
788 | ||
f1a26a06 | 789 | static void dsa_of_remove(struct device *dev) |
5e95329b | 790 | { |
f1a26a06 | 791 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 792 | |
f1a26a06 | 793 | if (!dev->of_node) |
5e95329b FF |
794 | return; |
795 | ||
21168245 | 796 | dsa_of_free_platform_data(pd); |
9861f720 | 797 | put_device(&pd->of_netdev->dev); |
5e95329b FF |
798 | kfree(pd); |
799 | } | |
800 | #else | |
f1a26a06 | 801 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
802 | { |
803 | return 0; | |
804 | } | |
805 | ||
f1a26a06 | 806 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
807 | { |
808 | } | |
809 | #endif | |
810 | ||
4d7f3e75 NA |
811 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
812 | struct device *parent, struct dsa_platform_data *pd) | |
c86e59b9 FF |
813 | { |
814 | int i; | |
4d7f3e75 | 815 | unsigned configured = 0; |
c86e59b9 FF |
816 | |
817 | dst->pd = pd; | |
818 | dst->master_netdev = dev; | |
819 | dst->cpu_switch = -1; | |
820 | dst->cpu_port = -1; | |
821 | ||
822 | for (i = 0; i < pd->nr_chips; i++) { | |
823 | struct dsa_switch *ds; | |
824 | ||
825 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
826 | if (IS_ERR(ds)) { | |
827 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
828 | i, PTR_ERR(ds)); | |
829 | continue; | |
830 | } | |
831 | ||
832 | dst->ds[i] = ds; | |
4d7f3e75 NA |
833 | |
834 | ++configured; | |
c86e59b9 FF |
835 | } |
836 | ||
4d7f3e75 NA |
837 | /* |
838 | * If no switch was found, exit cleanly | |
839 | */ | |
840 | if (!configured) | |
841 | return -EPROBE_DEFER; | |
842 | ||
c86e59b9 FF |
843 | /* |
844 | * If we use a tagging format that doesn't have an ethertype | |
845 | * field, make sure that all packets from this point on get | |
846 | * sent to the tag format's receive function. | |
847 | */ | |
848 | wmb(); | |
849 | dev->dsa_ptr = (void *)dst; | |
850 | ||
4d7f3e75 | 851 | return 0; |
c86e59b9 FF |
852 | } |
853 | ||
91da11f8 LB |
854 | static int dsa_probe(struct platform_device *pdev) |
855 | { | |
91da11f8 LB |
856 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
857 | struct net_device *dev; | |
e84665c9 | 858 | struct dsa_switch_tree *dst; |
c86e59b9 | 859 | int ret; |
91da11f8 | 860 | |
a2ae6007 JP |
861 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
862 | dsa_driver_version); | |
91da11f8 | 863 | |
5e95329b | 864 | if (pdev->dev.of_node) { |
f1a26a06 | 865 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
866 | if (ret) |
867 | return ret; | |
868 | ||
869 | pd = pdev->dev.platform_data; | |
870 | } | |
871 | ||
769a0202 | 872 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
873 | return -EINVAL; |
874 | ||
769a0202 FF |
875 | if (pd->of_netdev) { |
876 | dev = pd->of_netdev; | |
877 | dev_hold(dev); | |
878 | } else { | |
879 | dev = dev_to_net_device(pd->netdev); | |
880 | } | |
5e95329b | 881 | if (dev == NULL) { |
b324c07a | 882 | ret = -EPROBE_DEFER; |
5e95329b FF |
883 | goto out; |
884 | } | |
91da11f8 LB |
885 | |
886 | if (dev->dsa_ptr != NULL) { | |
887 | dev_put(dev); | |
5e95329b FF |
888 | ret = -EEXIST; |
889 | goto out; | |
91da11f8 LB |
890 | } |
891 | ||
d4ac35d6 | 892 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); |
e84665c9 | 893 | if (dst == NULL) { |
91da11f8 | 894 | dev_put(dev); |
5e95329b FF |
895 | ret = -ENOMEM; |
896 | goto out; | |
91da11f8 LB |
897 | } |
898 | ||
e84665c9 LB |
899 | platform_set_drvdata(pdev, dst); |
900 | ||
4d7f3e75 | 901 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); |
679fb46c NA |
902 | if (ret) { |
903 | dev_put(dev); | |
4d7f3e75 | 904 | goto out; |
679fb46c | 905 | } |
91da11f8 LB |
906 | |
907 | return 0; | |
5e95329b FF |
908 | |
909 | out: | |
f1a26a06 | 910 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
911 | |
912 | return ret; | |
91da11f8 LB |
913 | } |
914 | ||
c86e59b9 | 915 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 916 | { |
e84665c9 | 917 | int i; |
91da11f8 | 918 | |
04761890 NA |
919 | dst->master_netdev->dsa_ptr = NULL; |
920 | ||
921 | /* If we used a tagging format that doesn't have an ethertype | |
922 | * field, make sure that all packets from this point get sent | |
923 | * without the tag and go through the regular receive path. | |
924 | */ | |
925 | wmb(); | |
926 | ||
e84665c9 LB |
927 | for (i = 0; i < dst->pd->nr_chips; i++) { |
928 | struct dsa_switch *ds = dst->ds[i]; | |
929 | ||
d4ac35d6 | 930 | if (ds) |
e84665c9 LB |
931 | dsa_switch_destroy(ds); |
932 | } | |
679fb46c NA |
933 | |
934 | dev_put(dst->master_netdev); | |
c86e59b9 FF |
935 | } |
936 | ||
937 | static int dsa_remove(struct platform_device *pdev) | |
938 | { | |
939 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 940 | |
c86e59b9 | 941 | dsa_remove_dst(dst); |
f1a26a06 | 942 | dsa_of_remove(&pdev->dev); |
5e95329b | 943 | |
91da11f8 LB |
944 | return 0; |
945 | } | |
946 | ||
947 | static void dsa_shutdown(struct platform_device *pdev) | |
948 | { | |
949 | } | |
950 | ||
3e8a72d1 FF |
951 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
952 | struct packet_type *pt, struct net_device *orig_dev) | |
953 | { | |
954 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
955 | ||
956 | if (unlikely(dst == NULL)) { | |
957 | kfree_skb(skb); | |
958 | return 0; | |
959 | } | |
960 | ||
5075314e | 961 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
962 | } |
963 | ||
61b7363f | 964 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
965 | .type = cpu_to_be16(ETH_P_XDSA), |
966 | .func = dsa_switch_rcv, | |
967 | }; | |
968 | ||
b73adef6 FF |
969 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
970 | .notifier_call = dsa_slave_netdevice_event, | |
971 | }; | |
972 | ||
24462549 FF |
973 | #ifdef CONFIG_PM_SLEEP |
974 | static int dsa_suspend(struct device *d) | |
975 | { | |
976 | struct platform_device *pdev = to_platform_device(d); | |
977 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
978 | int i, ret = 0; | |
979 | ||
980 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
981 | struct dsa_switch *ds = dst->ds[i]; | |
982 | ||
983 | if (ds != NULL) | |
984 | ret = dsa_switch_suspend(ds); | |
985 | } | |
986 | ||
987 | return ret; | |
988 | } | |
989 | ||
990 | static int dsa_resume(struct device *d) | |
991 | { | |
992 | struct platform_device *pdev = to_platform_device(d); | |
993 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
994 | int i, ret = 0; | |
995 | ||
996 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
997 | struct dsa_switch *ds = dst->ds[i]; | |
998 | ||
999 | if (ds != NULL) | |
1000 | ret = dsa_switch_resume(ds); | |
1001 | } | |
1002 | ||
1003 | return ret; | |
1004 | } | |
1005 | #endif | |
1006 | ||
1007 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
1008 | ||
5e95329b | 1009 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 1010 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
1011 | { .compatible = "marvell,dsa", }, |
1012 | {} | |
1013 | }; | |
1014 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
1015 | ||
91da11f8 LB |
1016 | static struct platform_driver dsa_driver = { |
1017 | .probe = dsa_probe, | |
1018 | .remove = dsa_remove, | |
1019 | .shutdown = dsa_shutdown, | |
1020 | .driver = { | |
1021 | .name = "dsa", | |
5e95329b | 1022 | .of_match_table = dsa_of_match_table, |
24462549 | 1023 | .pm = &dsa_pm_ops, |
91da11f8 LB |
1024 | }, |
1025 | }; | |
1026 | ||
1027 | static int __init dsa_init_module(void) | |
1028 | { | |
7df899c3 BH |
1029 | int rc; |
1030 | ||
b73adef6 FF |
1031 | register_netdevice_notifier(&dsa_netdevice_nb); |
1032 | ||
7df899c3 BH |
1033 | rc = platform_driver_register(&dsa_driver); |
1034 | if (rc) | |
1035 | return rc; | |
1036 | ||
3e8a72d1 FF |
1037 | dev_add_pack(&dsa_pack_type); |
1038 | ||
7df899c3 | 1039 | return 0; |
91da11f8 LB |
1040 | } |
1041 | module_init(dsa_init_module); | |
1042 | ||
1043 | static void __exit dsa_cleanup_module(void) | |
1044 | { | |
b73adef6 | 1045 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 1046 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
1047 | platform_driver_unregister(&dsa_driver); |
1048 | } | |
1049 | module_exit(dsa_cleanup_module); | |
1050 | ||
577d6a7c | 1051 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
1052 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
1053 | MODULE_LICENSE("GPL"); | |
1054 | MODULE_ALIAS("platform:dsa"); |