Commit | Line | Data |
---|---|---|
91da11f8 LB |
1 | /* |
2 | * net/dsa/dsa.c - Hardware switch handling | |
e84665c9 | 3 | * Copyright (c) 2008-2009 Marvell Semiconductor |
5e95329b | 4 | * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org> |
91da11f8 LB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
51579c3f GR |
12 | #include <linux/ctype.h> |
13 | #include <linux/device.h> | |
14 | #include <linux/hwmon.h> | |
91da11f8 | 15 | #include <linux/list.h> |
91da11f8 | 16 | #include <linux/platform_device.h> |
5a0e3ad6 | 17 | #include <linux/slab.h> |
3a9a231d | 18 | #include <linux/module.h> |
91da11f8 | 19 | #include <net/dsa.h> |
5e95329b FF |
20 | #include <linux/of.h> |
21 | #include <linux/of_mdio.h> | |
22 | #include <linux/of_platform.h> | |
769a0202 | 23 | #include <linux/of_net.h> |
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 **************************************************/ | |
9b8e895c AL |
183 | int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev, |
184 | struct device_node *port_dn, int port) | |
39b0c705 | 185 | { |
39b0c705 | 186 | struct phy_device *phydev; |
9b8e895c AL |
187 | int ret, mode; |
188 | ||
189 | if (of_phy_is_fixed_link(port_dn)) { | |
190 | ret = of_phy_register_fixed_link(port_dn); | |
191 | if (ret) { | |
192 | dev_err(dev, "failed to register fixed PHY\n"); | |
193 | return ret; | |
194 | } | |
195 | phydev = of_phy_find_device(port_dn); | |
196 | ||
197 | mode = of_get_phy_mode(port_dn); | |
198 | if (mode < 0) | |
199 | mode = PHY_INTERFACE_MODE_NA; | |
200 | phydev->interface = mode; | |
201 | ||
202 | genphy_config_init(phydev); | |
203 | genphy_read_status(phydev); | |
204 | if (ds->drv->adjust_link) | |
205 | ds->drv->adjust_link(ds, port, phydev); | |
206 | } | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev) | |
212 | { | |
213 | struct device_node *port_dn; | |
214 | int ret, port; | |
39b0c705 AL |
215 | |
216 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
217 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
218 | continue; | |
219 | ||
189b0d93 | 220 | port_dn = ds->ports[port].dn; |
9b8e895c AL |
221 | ret = dsa_cpu_dsa_setup(ds, dev, port_dn, port); |
222 | if (ret) | |
223 | return ret; | |
39b0c705 AL |
224 | } |
225 | return 0; | |
226 | } | |
227 | ||
df197195 | 228 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 229 | { |
df197195 FF |
230 | struct dsa_switch_driver *drv = ds->drv; |
231 | struct dsa_switch_tree *dst = ds->dst; | |
ff04955c | 232 | struct dsa_chip_data *cd = ds->cd; |
f9bf5a2c | 233 | bool valid_name_found = false; |
df197195 FF |
234 | int index = ds->index; |
235 | int i, ret; | |
91da11f8 LB |
236 | |
237 | /* | |
238 | * Validate supplied switch configuration. | |
239 | */ | |
91da11f8 LB |
240 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
241 | char *name; | |
242 | ||
ff04955c | 243 | name = cd->port_names[i]; |
91da11f8 LB |
244 | if (name == NULL) |
245 | continue; | |
246 | ||
247 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 248 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
249 | netdev_err(dst->master_netdev, |
250 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
251 | ret = -EINVAL; |
252 | goto out; | |
253 | } | |
e84665c9 LB |
254 | dst->cpu_switch = index; |
255 | dst->cpu_port = i; | |
256 | } else if (!strcmp(name, "dsa")) { | |
257 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 258 | } else { |
74c3e2a5 | 259 | ds->enabled_port_mask |= 1 << i; |
91da11f8 | 260 | } |
f9bf5a2c | 261 | valid_name_found = true; |
91da11f8 LB |
262 | } |
263 | ||
f9bf5a2c FF |
264 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
265 | ret = -EINVAL; | |
266 | goto out; | |
267 | } | |
91da11f8 | 268 | |
0d8bcdd3 FF |
269 | /* Make the built-in MII bus mask match the number of ports, |
270 | * switch drivers can override this later | |
271 | */ | |
74c3e2a5 | 272 | ds->phys_mii_mask = ds->enabled_port_mask; |
0d8bcdd3 | 273 | |
91da11f8 | 274 | /* |
e84665c9 LB |
275 | * If the CPU connects to this switch, set the switch tree |
276 | * tagging protocol to the preferred tagging format of this | |
277 | * switch. | |
91da11f8 | 278 | */ |
5075314e | 279 | if (dst->cpu_switch == index) { |
c60c9840 | 280 | switch (drv->tag_protocol) { |
5075314e AD |
281 | #ifdef CONFIG_NET_DSA_TAG_DSA |
282 | case DSA_TAG_PROTO_DSA: | |
283 | dst->rcv = dsa_netdev_ops.rcv; | |
284 | break; | |
285 | #endif | |
286 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
287 | case DSA_TAG_PROTO_EDSA: | |
288 | dst->rcv = edsa_netdev_ops.rcv; | |
289 | break; | |
290 | #endif | |
291 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
292 | case DSA_TAG_PROTO_TRAILER: | |
293 | dst->rcv = trailer_netdev_ops.rcv; | |
294 | break; | |
295 | #endif | |
296 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
297 | case DSA_TAG_PROTO_BRCM: | |
298 | dst->rcv = brcm_netdev_ops.rcv; | |
299 | break; | |
300 | #endif | |
ae439286 | 301 | case DSA_TAG_PROTO_NONE: |
5075314e | 302 | break; |
ae439286 AL |
303 | default: |
304 | ret = -ENOPROTOOPT; | |
305 | goto out; | |
5075314e | 306 | } |
91da11f8 | 307 | |
c60c9840 | 308 | dst->tag_protocol = drv->tag_protocol; |
5075314e | 309 | } |
91da11f8 | 310 | |
66472fc0 AL |
311 | memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable)); |
312 | ||
91da11f8 LB |
313 | /* |
314 | * Do basic register setup. | |
315 | */ | |
316 | ret = drv->setup(ds); | |
317 | if (ret < 0) | |
318 | goto out; | |
319 | ||
e84665c9 | 320 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
321 | if (ret < 0) |
322 | goto out; | |
323 | ||
d4ac35d6 | 324 | ds->slave_mii_bus = devm_mdiobus_alloc(parent); |
91da11f8 LB |
325 | if (ds->slave_mii_bus == NULL) { |
326 | ret = -ENOMEM; | |
327 | goto out; | |
328 | } | |
329 | dsa_slave_mii_bus_init(ds); | |
330 | ||
331 | ret = mdiobus_register(ds->slave_mii_bus); | |
332 | if (ret < 0) | |
d4ac35d6 | 333 | goto out; |
91da11f8 LB |
334 | |
335 | ||
336 | /* | |
337 | * Create network devices for physical switch ports. | |
338 | */ | |
91da11f8 | 339 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
189b0d93 AL |
340 | ds->ports[i].dn = cd->port_dn[i]; |
341 | ||
74c3e2a5 | 342 | if (!(ds->enabled_port_mask & (1 << i))) |
91da11f8 LB |
343 | continue; |
344 | ||
ff04955c | 345 | ret = dsa_slave_create(ds, parent, i, cd->port_names[i]); |
d87d6f44 | 346 | if (ret < 0) { |
d25b8e74 | 347 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
ff04955c | 348 | index, i, cd->port_names[i], ret); |
d87d6f44 | 349 | ret = 0; |
91da11f8 | 350 | } |
91da11f8 LB |
351 | } |
352 | ||
39b0c705 | 353 | /* Perform configuration of the CPU and DSA ports */ |
9b8e895c | 354 | ret = dsa_cpu_dsa_setups(ds, parent); |
39b0c705 AL |
355 | if (ret < 0) { |
356 | netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n", | |
357 | index); | |
358 | ret = 0; | |
359 | } | |
360 | ||
51579c3f GR |
361 | #ifdef CONFIG_NET_DSA_HWMON |
362 | /* If the switch provides a temperature sensor, | |
363 | * register with hardware monitoring subsystem. | |
364 | * Treat registration error as non-fatal and ignore it. | |
365 | */ | |
366 | if (drv->get_temp) { | |
367 | const char *netname = netdev_name(dst->master_netdev); | |
368 | char hname[IFNAMSIZ + 1]; | |
369 | int i, j; | |
370 | ||
371 | /* Create valid hwmon 'name' attribute */ | |
372 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
373 | if (isalnum(netname[i])) | |
374 | hname[j++] = netname[i]; | |
375 | } | |
376 | hname[j] = '\0'; | |
377 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
378 | hname, index); | |
379 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
380 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
381 | if (IS_ERR(ds->hwmon_dev)) | |
382 | ds->hwmon_dev = NULL; | |
383 | } | |
384 | #endif /* CONFIG_NET_DSA_HWMON */ | |
385 | ||
df197195 | 386 | return ret; |
91da11f8 | 387 | |
91da11f8 | 388 | out: |
df197195 FF |
389 | return ret; |
390 | } | |
391 | ||
392 | static struct dsa_switch * | |
393 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
394 | struct device *parent, struct device *host_dev) | |
395 | { | |
ff04955c | 396 | struct dsa_chip_data *cd = dst->pd->chip + index; |
df197195 FF |
397 | struct dsa_switch_driver *drv; |
398 | struct dsa_switch *ds; | |
399 | int ret; | |
0209d144 | 400 | const char *name; |
7543a6d5 | 401 | void *priv; |
df197195 FF |
402 | |
403 | /* | |
404 | * Probe for switch model. | |
405 | */ | |
ff04955c | 406 | drv = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv); |
df197195 FF |
407 | if (drv == NULL) { |
408 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", | |
409 | index); | |
410 | return ERR_PTR(-EINVAL); | |
411 | } | |
412 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
413 | index, name); | |
414 | ||
415 | ||
416 | /* | |
417 | * Allocate and initialise switch state. | |
418 | */ | |
5feebd0a | 419 | ds = devm_kzalloc(parent, sizeof(*ds), GFP_KERNEL); |
df197195 | 420 | if (ds == NULL) |
24595346 | 421 | return ERR_PTR(-ENOMEM); |
df197195 FF |
422 | |
423 | ds->dst = dst; | |
424 | ds->index = index; | |
ff04955c | 425 | ds->cd = cd; |
df197195 | 426 | ds->drv = drv; |
7543a6d5 | 427 | ds->priv = priv; |
c33063d6 | 428 | ds->dev = parent; |
df197195 FF |
429 | |
430 | ret = dsa_switch_setup_one(ds, parent); | |
431 | if (ret) | |
24595346 | 432 | return ERR_PTR(ret); |
df197195 FF |
433 | |
434 | return ds; | |
91da11f8 LB |
435 | } |
436 | ||
9b8e895c | 437 | void dsa_cpu_dsa_destroy(struct device_node *port_dn) |
91da11f8 | 438 | { |
cbc5d90b | 439 | struct phy_device *phydev; |
9b8e895c AL |
440 | |
441 | if (of_phy_is_fixed_link(port_dn)) { | |
442 | phydev = of_phy_find_device(port_dn); | |
443 | if (phydev) { | |
444 | phy_device_free(phydev); | |
445 | fixed_phy_unregister(phydev); | |
446 | } | |
447 | } | |
448 | } | |
449 | ||
450 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
451 | { | |
cbc5d90b NA |
452 | int port; |
453 | ||
51579c3f GR |
454 | #ifdef CONFIG_NET_DSA_HWMON |
455 | if (ds->hwmon_dev) | |
456 | hwmon_device_unregister(ds->hwmon_dev); | |
457 | #endif | |
cbc5d90b | 458 | |
3a44514f AL |
459 | /* Destroy network devices for physical switch ports. */ |
460 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
74c3e2a5 | 461 | if (!(ds->enabled_port_mask & (1 << port))) |
3a44514f AL |
462 | continue; |
463 | ||
c8b09808 | 464 | if (!ds->ports[port].netdev) |
3a44514f AL |
465 | continue; |
466 | ||
c8b09808 | 467 | dsa_slave_destroy(ds->ports[port].netdev); |
3a44514f AL |
468 | } |
469 | ||
9b8e895c | 470 | /* Disable configuration of the CPU and DSA ports */ |
cbc5d90b | 471 | for (port = 0; port < DSA_MAX_PORTS; port++) { |
9b8e895c AL |
472 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) |
473 | continue; | |
474 | dsa_cpu_dsa_destroy(ds->ports[port].dn); | |
cbc5d90b NA |
475 | } |
476 | ||
e410ddb8 | 477 | mdiobus_unregister(ds->slave_mii_bus); |
91da11f8 LB |
478 | } |
479 | ||
e506d405 | 480 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
481 | static int dsa_switch_suspend(struct dsa_switch *ds) |
482 | { | |
483 | int i, ret = 0; | |
484 | ||
485 | /* Suspend slave network devices */ | |
486 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 487 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
488 | continue; |
489 | ||
c8b09808 | 490 | ret = dsa_slave_suspend(ds->ports[i].netdev); |
24462549 FF |
491 | if (ret) |
492 | return ret; | |
493 | } | |
494 | ||
495 | if (ds->drv->suspend) | |
496 | ret = ds->drv->suspend(ds); | |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
501 | static int dsa_switch_resume(struct dsa_switch *ds) | |
502 | { | |
503 | int i, ret = 0; | |
504 | ||
505 | if (ds->drv->resume) | |
506 | ret = ds->drv->resume(ds); | |
507 | ||
508 | if (ret) | |
509 | return ret; | |
510 | ||
511 | /* Resume slave network devices */ | |
512 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 513 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
514 | continue; |
515 | ||
c8b09808 | 516 | ret = dsa_slave_resume(ds->ports[i].netdev); |
24462549 FF |
517 | if (ret) |
518 | return ret; | |
519 | } | |
520 | ||
521 | return 0; | |
522 | } | |
e506d405 | 523 | #endif |
24462549 | 524 | |
91da11f8 LB |
525 | /* platform driver init and cleanup *****************************************/ |
526 | static int dev_is_class(struct device *dev, void *class) | |
527 | { | |
528 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
529 | return 1; | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | static struct device *dev_find_class(struct device *parent, char *class) | |
535 | { | |
536 | if (dev_is_class(parent, class)) { | |
537 | get_device(parent); | |
538 | return parent; | |
539 | } | |
540 | ||
541 | return device_find_child(parent, class, dev_is_class); | |
542 | } | |
543 | ||
b4d2394d | 544 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
545 | { |
546 | struct device *d; | |
547 | ||
548 | d = dev_find_class(dev, "mdio_bus"); | |
549 | if (d != NULL) { | |
550 | struct mii_bus *bus; | |
551 | ||
552 | bus = to_mii_bus(d); | |
553 | put_device(d); | |
554 | ||
555 | return bus; | |
556 | } | |
557 | ||
558 | return NULL; | |
559 | } | |
b4d2394d | 560 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
561 | |
562 | static struct net_device *dev_to_net_device(struct device *dev) | |
563 | { | |
564 | struct device *d; | |
565 | ||
566 | d = dev_find_class(dev, "net"); | |
567 | if (d != NULL) { | |
568 | struct net_device *nd; | |
569 | ||
570 | nd = to_net_dev(d); | |
571 | dev_hold(nd); | |
572 | put_device(d); | |
573 | ||
574 | return nd; | |
575 | } | |
576 | ||
577 | return NULL; | |
578 | } | |
579 | ||
5e95329b FF |
580 | #ifdef CONFIG_OF |
581 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
582 | struct dsa_chip_data *cd, | |
30303813 | 583 | int chip_index, int port_index, |
5e95329b FF |
584 | struct device_node *link) |
585 | { | |
5e95329b | 586 | const __be32 *reg; |
5e95329b FF |
587 | int link_sw_addr; |
588 | struct device_node *parent_sw; | |
589 | int len; | |
590 | ||
591 | parent_sw = of_get_parent(link); | |
592 | if (!parent_sw) | |
593 | return -EINVAL; | |
594 | ||
595 | reg = of_get_property(parent_sw, "reg", &len); | |
596 | if (!reg || (len != sizeof(*reg) * 2)) | |
597 | return -EINVAL; | |
598 | ||
30303813 PN |
599 | /* |
600 | * Get the destination switch number from the second field of its 'reg' | |
601 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
602 | */ | |
5e95329b FF |
603 | link_sw_addr = be32_to_cpup(reg + 1); |
604 | ||
605 | if (link_sw_addr >= pd->nr_chips) | |
606 | return -EINVAL; | |
607 | ||
30303813 | 608 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
609 | |
610 | return 0; | |
5e95329b FF |
611 | } |
612 | ||
1e72e6f8 AL |
613 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
614 | struct dsa_chip_data *cd, | |
615 | int chip_index, int port_index, | |
616 | struct device_node *port, | |
617 | const char *port_name) | |
618 | { | |
619 | struct device_node *link; | |
620 | int link_index; | |
621 | int ret; | |
622 | ||
623 | for (link_index = 0;; link_index++) { | |
624 | link = of_parse_phandle(port, "link", link_index); | |
625 | if (!link) | |
626 | break; | |
627 | ||
628 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
629 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
630 | port_index, link); | |
631 | if (ret) | |
632 | return ret; | |
633 | } | |
634 | } | |
635 | return 0; | |
636 | } | |
637 | ||
21168245 FF |
638 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
639 | { | |
640 | int i; | |
641 | int port_index; | |
642 | ||
643 | for (i = 0; i < pd->nr_chips; i++) { | |
644 | port_index = 0; | |
5f64a7db | 645 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 646 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
647 | port_index++; |
648 | } | |
e496ae69 RK |
649 | |
650 | /* Drop our reference to the MDIO bus device */ | |
651 | if (pd->chip[i].host_dev) | |
652 | put_device(pd->chip[i].host_dev); | |
21168245 FF |
653 | } |
654 | kfree(pd->chip); | |
655 | } | |
656 | ||
f1a26a06 | 657 | static int dsa_of_probe(struct device *dev) |
5e95329b | 658 | { |
f1a26a06 | 659 | struct device_node *np = dev->of_node; |
1e72e6f8 | 660 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 661 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 662 | struct net_device *ethernet_dev; |
5e95329b FF |
663 | struct dsa_platform_data *pd; |
664 | struct dsa_chip_data *cd; | |
665 | const char *port_name; | |
666 | int chip_index, port_index; | |
667 | const unsigned int *sw_addr, *port_reg; | |
6793abb4 | 668 | u32 eeprom_len; |
21168245 | 669 | int ret; |
5e95329b FF |
670 | |
671 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
672 | if (!mdio) | |
673 | return -EINVAL; | |
674 | ||
675 | mdio_bus = of_mdio_find_bus(mdio); | |
676 | if (!mdio_bus) | |
b324c07a | 677 | return -EPROBE_DEFER; |
5e95329b FF |
678 | |
679 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
e496ae69 RK |
680 | if (!ethernet) { |
681 | ret = -EINVAL; | |
682 | goto out_put_mdio; | |
683 | } | |
5e95329b | 684 | |
769a0202 | 685 | ethernet_dev = of_find_net_device_by_node(ethernet); |
e496ae69 RK |
686 | if (!ethernet_dev) { |
687 | ret = -EPROBE_DEFER; | |
688 | goto out_put_mdio; | |
689 | } | |
5e95329b FF |
690 | |
691 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
e496ae69 RK |
692 | if (!pd) { |
693 | ret = -ENOMEM; | |
9861f720 | 694 | goto out_put_ethernet; |
e496ae69 | 695 | } |
5e95329b | 696 | |
f1a26a06 | 697 | dev->platform_data = pd; |
769a0202 | 698 | pd->of_netdev = ethernet_dev; |
e04449fc | 699 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
700 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
701 | pd->nr_chips = DSA_MAX_SWITCHES; | |
702 | ||
6f2aed6a FF |
703 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
704 | GFP_KERNEL); | |
5e95329b FF |
705 | if (!pd->chip) { |
706 | ret = -ENOMEM; | |
707 | goto out_free; | |
708 | } | |
709 | ||
d1c0b471 | 710 | chip_index = -1; |
5e95329b | 711 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 712 | chip_index++; |
5e95329b FF |
713 | cd = &pd->chip[chip_index]; |
714 | ||
fa981d9a | 715 | cd->of_node = child; |
e496ae69 RK |
716 | |
717 | /* When assigning the host device, increment its refcount */ | |
718 | cd->host_dev = get_device(&mdio_bus->dev); | |
5e95329b FF |
719 | |
720 | sw_addr = of_get_property(child, "reg", NULL); | |
721 | if (!sw_addr) | |
722 | continue; | |
723 | ||
724 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 725 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
726 | continue; |
727 | ||
50d4964f | 728 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
729 | cd->eeprom_len = eeprom_len; |
730 | ||
6bc6d0a8 AL |
731 | mdio = of_parse_phandle(child, "mii-bus", 0); |
732 | if (mdio) { | |
733 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
734 | if (!mdio_bus_switch) { | |
735 | ret = -EPROBE_DEFER; | |
736 | goto out_free_chip; | |
737 | } | |
e496ae69 RK |
738 | |
739 | /* Drop the mdio_bus device ref, replacing the host | |
740 | * device with the mdio_bus_switch device, keeping | |
741 | * the refcount from of_mdio_find_bus() above. | |
742 | */ | |
743 | put_device(cd->host_dev); | |
6bc6d0a8 AL |
744 | cd->host_dev = &mdio_bus_switch->dev; |
745 | } | |
746 | ||
5e95329b FF |
747 | for_each_available_child_of_node(child, port) { |
748 | port_reg = of_get_property(port, "reg", NULL); | |
749 | if (!port_reg) | |
750 | continue; | |
751 | ||
752 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
753 | if (port_index >= DSA_MAX_PORTS) |
754 | break; | |
5e95329b FF |
755 | |
756 | port_name = of_get_property(port, "label", NULL); | |
757 | if (!port_name) | |
758 | continue; | |
759 | ||
bd47497a FF |
760 | cd->port_dn[port_index] = port; |
761 | ||
5e95329b FF |
762 | cd->port_names[port_index] = kstrdup(port_name, |
763 | GFP_KERNEL); | |
764 | if (!cd->port_names[port_index]) { | |
765 | ret = -ENOMEM; | |
766 | goto out_free_chip; | |
767 | } | |
768 | ||
1e72e6f8 AL |
769 | ret = dsa_of_probe_links(pd, cd, chip_index, |
770 | port_index, port, port_name); | |
771 | if (ret) | |
772 | goto out_free_chip; | |
5e95329b | 773 | |
5e95329b FF |
774 | } |
775 | } | |
776 | ||
e496ae69 RK |
777 | /* The individual chips hold their own refcount on the mdio bus, |
778 | * so drop ours */ | |
779 | put_device(&mdio_bus->dev); | |
780 | ||
5e95329b FF |
781 | return 0; |
782 | ||
783 | out_free_chip: | |
21168245 | 784 | dsa_of_free_platform_data(pd); |
5e95329b FF |
785 | out_free: |
786 | kfree(pd); | |
f1a26a06 | 787 | dev->platform_data = NULL; |
9861f720 RK |
788 | out_put_ethernet: |
789 | put_device(ðernet_dev->dev); | |
e496ae69 RK |
790 | out_put_mdio: |
791 | put_device(&mdio_bus->dev); | |
5e95329b FF |
792 | return ret; |
793 | } | |
794 | ||
f1a26a06 | 795 | static void dsa_of_remove(struct device *dev) |
5e95329b | 796 | { |
f1a26a06 | 797 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 798 | |
f1a26a06 | 799 | if (!dev->of_node) |
5e95329b FF |
800 | return; |
801 | ||
21168245 | 802 | dsa_of_free_platform_data(pd); |
9861f720 | 803 | put_device(&pd->of_netdev->dev); |
5e95329b FF |
804 | kfree(pd); |
805 | } | |
806 | #else | |
f1a26a06 | 807 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
808 | { |
809 | return 0; | |
810 | } | |
811 | ||
f1a26a06 | 812 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
813 | { |
814 | } | |
815 | #endif | |
816 | ||
4d7f3e75 NA |
817 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
818 | struct device *parent, struct dsa_platform_data *pd) | |
c86e59b9 FF |
819 | { |
820 | int i; | |
4d7f3e75 | 821 | unsigned configured = 0; |
c86e59b9 FF |
822 | |
823 | dst->pd = pd; | |
824 | dst->master_netdev = dev; | |
825 | dst->cpu_switch = -1; | |
826 | dst->cpu_port = -1; | |
827 | ||
828 | for (i = 0; i < pd->nr_chips; i++) { | |
829 | struct dsa_switch *ds; | |
830 | ||
831 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
832 | if (IS_ERR(ds)) { | |
833 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
834 | i, PTR_ERR(ds)); | |
835 | continue; | |
836 | } | |
837 | ||
838 | dst->ds[i] = ds; | |
4d7f3e75 NA |
839 | |
840 | ++configured; | |
c86e59b9 FF |
841 | } |
842 | ||
4d7f3e75 NA |
843 | /* |
844 | * If no switch was found, exit cleanly | |
845 | */ | |
846 | if (!configured) | |
847 | return -EPROBE_DEFER; | |
848 | ||
c86e59b9 FF |
849 | /* |
850 | * If we use a tagging format that doesn't have an ethertype | |
851 | * field, make sure that all packets from this point on get | |
852 | * sent to the tag format's receive function. | |
853 | */ | |
854 | wmb(); | |
855 | dev->dsa_ptr = (void *)dst; | |
856 | ||
4d7f3e75 | 857 | return 0; |
c86e59b9 FF |
858 | } |
859 | ||
91da11f8 LB |
860 | static int dsa_probe(struct platform_device *pdev) |
861 | { | |
91da11f8 LB |
862 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
863 | struct net_device *dev; | |
e84665c9 | 864 | struct dsa_switch_tree *dst; |
c86e59b9 | 865 | int ret; |
91da11f8 | 866 | |
a2ae6007 JP |
867 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
868 | dsa_driver_version); | |
91da11f8 | 869 | |
5e95329b | 870 | if (pdev->dev.of_node) { |
f1a26a06 | 871 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
872 | if (ret) |
873 | return ret; | |
874 | ||
875 | pd = pdev->dev.platform_data; | |
876 | } | |
877 | ||
769a0202 | 878 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
879 | return -EINVAL; |
880 | ||
769a0202 FF |
881 | if (pd->of_netdev) { |
882 | dev = pd->of_netdev; | |
883 | dev_hold(dev); | |
884 | } else { | |
885 | dev = dev_to_net_device(pd->netdev); | |
886 | } | |
5e95329b | 887 | if (dev == NULL) { |
b324c07a | 888 | ret = -EPROBE_DEFER; |
5e95329b FF |
889 | goto out; |
890 | } | |
91da11f8 LB |
891 | |
892 | if (dev->dsa_ptr != NULL) { | |
893 | dev_put(dev); | |
5e95329b FF |
894 | ret = -EEXIST; |
895 | goto out; | |
91da11f8 LB |
896 | } |
897 | ||
d4ac35d6 | 898 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); |
e84665c9 | 899 | if (dst == NULL) { |
91da11f8 | 900 | dev_put(dev); |
5e95329b FF |
901 | ret = -ENOMEM; |
902 | goto out; | |
91da11f8 LB |
903 | } |
904 | ||
e84665c9 LB |
905 | platform_set_drvdata(pdev, dst); |
906 | ||
4d7f3e75 | 907 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); |
679fb46c NA |
908 | if (ret) { |
909 | dev_put(dev); | |
4d7f3e75 | 910 | goto out; |
679fb46c | 911 | } |
91da11f8 LB |
912 | |
913 | return 0; | |
5e95329b FF |
914 | |
915 | out: | |
f1a26a06 | 916 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
917 | |
918 | return ret; | |
91da11f8 LB |
919 | } |
920 | ||
c86e59b9 | 921 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 922 | { |
e84665c9 | 923 | int i; |
91da11f8 | 924 | |
04761890 NA |
925 | dst->master_netdev->dsa_ptr = NULL; |
926 | ||
927 | /* If we used a tagging format that doesn't have an ethertype | |
928 | * field, make sure that all packets from this point get sent | |
929 | * without the tag and go through the regular receive path. | |
930 | */ | |
931 | wmb(); | |
932 | ||
e84665c9 LB |
933 | for (i = 0; i < dst->pd->nr_chips; i++) { |
934 | struct dsa_switch *ds = dst->ds[i]; | |
935 | ||
d4ac35d6 | 936 | if (ds) |
e84665c9 LB |
937 | dsa_switch_destroy(ds); |
938 | } | |
679fb46c NA |
939 | |
940 | dev_put(dst->master_netdev); | |
c86e59b9 FF |
941 | } |
942 | ||
943 | static int dsa_remove(struct platform_device *pdev) | |
944 | { | |
945 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 946 | |
c86e59b9 | 947 | dsa_remove_dst(dst); |
f1a26a06 | 948 | dsa_of_remove(&pdev->dev); |
5e95329b | 949 | |
91da11f8 LB |
950 | return 0; |
951 | } | |
952 | ||
953 | static void dsa_shutdown(struct platform_device *pdev) | |
954 | { | |
955 | } | |
956 | ||
3e8a72d1 FF |
957 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
958 | struct packet_type *pt, struct net_device *orig_dev) | |
959 | { | |
960 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
961 | ||
962 | if (unlikely(dst == NULL)) { | |
963 | kfree_skb(skb); | |
964 | return 0; | |
965 | } | |
966 | ||
5075314e | 967 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
968 | } |
969 | ||
61b7363f | 970 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
971 | .type = cpu_to_be16(ETH_P_XDSA), |
972 | .func = dsa_switch_rcv, | |
973 | }; | |
974 | ||
b73adef6 FF |
975 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
976 | .notifier_call = dsa_slave_netdevice_event, | |
977 | }; | |
978 | ||
24462549 FF |
979 | #ifdef CONFIG_PM_SLEEP |
980 | static int dsa_suspend(struct device *d) | |
981 | { | |
982 | struct platform_device *pdev = to_platform_device(d); | |
983 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
984 | int i, ret = 0; | |
985 | ||
986 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
987 | struct dsa_switch *ds = dst->ds[i]; | |
988 | ||
989 | if (ds != NULL) | |
990 | ret = dsa_switch_suspend(ds); | |
991 | } | |
992 | ||
993 | return ret; | |
994 | } | |
995 | ||
996 | static int dsa_resume(struct device *d) | |
997 | { | |
998 | struct platform_device *pdev = to_platform_device(d); | |
999 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
1000 | int i, ret = 0; | |
1001 | ||
1002 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
1003 | struct dsa_switch *ds = dst->ds[i]; | |
1004 | ||
1005 | if (ds != NULL) | |
1006 | ret = dsa_switch_resume(ds); | |
1007 | } | |
1008 | ||
1009 | return ret; | |
1010 | } | |
1011 | #endif | |
1012 | ||
1013 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
1014 | ||
5e95329b | 1015 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 1016 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
1017 | { .compatible = "marvell,dsa", }, |
1018 | {} | |
1019 | }; | |
1020 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
1021 | ||
91da11f8 LB |
1022 | static struct platform_driver dsa_driver = { |
1023 | .probe = dsa_probe, | |
1024 | .remove = dsa_remove, | |
1025 | .shutdown = dsa_shutdown, | |
1026 | .driver = { | |
1027 | .name = "dsa", | |
5e95329b | 1028 | .of_match_table = dsa_of_match_table, |
24462549 | 1029 | .pm = &dsa_pm_ops, |
91da11f8 LB |
1030 | }, |
1031 | }; | |
1032 | ||
1033 | static int __init dsa_init_module(void) | |
1034 | { | |
7df899c3 BH |
1035 | int rc; |
1036 | ||
b73adef6 FF |
1037 | register_netdevice_notifier(&dsa_netdevice_nb); |
1038 | ||
7df899c3 BH |
1039 | rc = platform_driver_register(&dsa_driver); |
1040 | if (rc) | |
1041 | return rc; | |
1042 | ||
3e8a72d1 FF |
1043 | dev_add_pack(&dsa_pack_type); |
1044 | ||
7df899c3 | 1045 | return 0; |
91da11f8 LB |
1046 | } |
1047 | module_init(dsa_init_module); | |
1048 | ||
1049 | static void __exit dsa_cleanup_module(void) | |
1050 | { | |
b73adef6 | 1051 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 1052 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
1053 | platform_driver_unregister(&dsa_driver); |
1054 | } | |
1055 | module_exit(dsa_cleanup_module); | |
1056 | ||
577d6a7c | 1057 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
1058 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
1059 | MODULE_LICENSE("GPL"); | |
1060 | MODULE_ALIAS("platform:dsa"); |