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 **************************************************/ | |
39b0c705 AL |
183 | static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master) |
184 | { | |
185 | struct dsa_chip_data *cd = ds->pd; | |
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; | |
222 | struct dsa_chip_data *pd = ds->pd; | |
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 | ||
233 | name = pd->port_names[i]; | |
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) { |
59299031 | 270 | switch (ds->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 | |
59299031 | 298 | dst->tag_protocol = ds->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 | ||
d87d6f44 GR |
331 | ret = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
332 | if (ret < 0) { | |
d25b8e74 RK |
333 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
334 | index, i, pd->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 | { | |
382 | struct dsa_chip_data *pd = dst->pd->chip + index; | |
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 | */ | |
7543a6d5 | 392 | drv = dsa_switch_probe(parent, host_dev, pd->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; | |
411 | ds->pd = pd; | |
412 | ds->drv = drv; | |
7543a6d5 | 413 | ds->priv = priv; |
59299031 | 414 | ds->tag_protocol = drv->tag_protocol; |
df197195 FF |
415 | ds->master_dev = host_dev; |
416 | ||
417 | ret = dsa_switch_setup_one(ds, parent); | |
418 | if (ret) | |
24595346 | 419 | return ERR_PTR(ret); |
df197195 FF |
420 | |
421 | return ds; | |
91da11f8 LB |
422 | } |
423 | ||
424 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
425 | { | |
cbc5d90b NA |
426 | struct device_node *port_dn; |
427 | struct phy_device *phydev; | |
428 | struct dsa_chip_data *cd = ds->pd; | |
429 | int port; | |
430 | ||
51579c3f GR |
431 | #ifdef CONFIG_NET_DSA_HWMON |
432 | if (ds->hwmon_dev) | |
433 | hwmon_device_unregister(ds->hwmon_dev); | |
434 | #endif | |
cbc5d90b | 435 | |
3a44514f AL |
436 | /* Destroy network devices for physical switch ports. */ |
437 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
74c3e2a5 | 438 | if (!(ds->enabled_port_mask & (1 << port))) |
3a44514f AL |
439 | continue; |
440 | ||
441 | if (!ds->ports[port]) | |
442 | continue; | |
443 | ||
444 | dsa_slave_destroy(ds->ports[port]); | |
445 | } | |
446 | ||
447 | /* Remove any fixed link PHYs */ | |
cbc5d90b | 448 | for (port = 0; port < DSA_MAX_PORTS; port++) { |
cbc5d90b NA |
449 | port_dn = cd->port_dn[port]; |
450 | if (of_phy_is_fixed_link(port_dn)) { | |
451 | phydev = of_phy_find_device(port_dn); | |
452 | if (phydev) { | |
cbc5d90b NA |
453 | phy_device_free(phydev); |
454 | of_node_put(port_dn); | |
5bcbe0f3 | 455 | fixed_phy_unregister(phydev); |
cbc5d90b NA |
456 | } |
457 | } | |
458 | } | |
459 | ||
e410ddb8 | 460 | mdiobus_unregister(ds->slave_mii_bus); |
91da11f8 LB |
461 | } |
462 | ||
e506d405 | 463 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
464 | static int dsa_switch_suspend(struct dsa_switch *ds) |
465 | { | |
466 | int i, ret = 0; | |
467 | ||
468 | /* Suspend slave network devices */ | |
469 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 470 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
471 | continue; |
472 | ||
473 | ret = dsa_slave_suspend(ds->ports[i]); | |
474 | if (ret) | |
475 | return ret; | |
476 | } | |
477 | ||
478 | if (ds->drv->suspend) | |
479 | ret = ds->drv->suspend(ds); | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
484 | static int dsa_switch_resume(struct dsa_switch *ds) | |
485 | { | |
486 | int i, ret = 0; | |
487 | ||
488 | if (ds->drv->resume) | |
489 | ret = ds->drv->resume(ds); | |
490 | ||
491 | if (ret) | |
492 | return ret; | |
493 | ||
494 | /* Resume slave network devices */ | |
495 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 496 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
497 | continue; |
498 | ||
499 | ret = dsa_slave_resume(ds->ports[i]); | |
500 | if (ret) | |
501 | return ret; | |
502 | } | |
503 | ||
504 | return 0; | |
505 | } | |
e506d405 | 506 | #endif |
24462549 | 507 | |
91da11f8 LB |
508 | /* platform driver init and cleanup *****************************************/ |
509 | static int dev_is_class(struct device *dev, void *class) | |
510 | { | |
511 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
512 | return 1; | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | static struct device *dev_find_class(struct device *parent, char *class) | |
518 | { | |
519 | if (dev_is_class(parent, class)) { | |
520 | get_device(parent); | |
521 | return parent; | |
522 | } | |
523 | ||
524 | return device_find_child(parent, class, dev_is_class); | |
525 | } | |
526 | ||
b4d2394d | 527 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
528 | { |
529 | struct device *d; | |
530 | ||
531 | d = dev_find_class(dev, "mdio_bus"); | |
532 | if (d != NULL) { | |
533 | struct mii_bus *bus; | |
534 | ||
535 | bus = to_mii_bus(d); | |
536 | put_device(d); | |
537 | ||
538 | return bus; | |
539 | } | |
540 | ||
541 | return NULL; | |
542 | } | |
b4d2394d | 543 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
544 | |
545 | static struct net_device *dev_to_net_device(struct device *dev) | |
546 | { | |
547 | struct device *d; | |
548 | ||
549 | d = dev_find_class(dev, "net"); | |
550 | if (d != NULL) { | |
551 | struct net_device *nd; | |
552 | ||
553 | nd = to_net_dev(d); | |
554 | dev_hold(nd); | |
555 | put_device(d); | |
556 | ||
557 | return nd; | |
558 | } | |
559 | ||
560 | return NULL; | |
561 | } | |
562 | ||
5e95329b FF |
563 | #ifdef CONFIG_OF |
564 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
565 | struct dsa_chip_data *cd, | |
30303813 | 566 | int chip_index, int port_index, |
5e95329b FF |
567 | struct device_node *link) |
568 | { | |
5e95329b | 569 | const __be32 *reg; |
5e95329b FF |
570 | int link_sw_addr; |
571 | struct device_node *parent_sw; | |
572 | int len; | |
573 | ||
574 | parent_sw = of_get_parent(link); | |
575 | if (!parent_sw) | |
576 | return -EINVAL; | |
577 | ||
578 | reg = of_get_property(parent_sw, "reg", &len); | |
579 | if (!reg || (len != sizeof(*reg) * 2)) | |
580 | return -EINVAL; | |
581 | ||
30303813 PN |
582 | /* |
583 | * Get the destination switch number from the second field of its 'reg' | |
584 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
585 | */ | |
5e95329b FF |
586 | link_sw_addr = be32_to_cpup(reg + 1); |
587 | ||
588 | if (link_sw_addr >= pd->nr_chips) | |
589 | return -EINVAL; | |
590 | ||
591 | /* First time routing table allocation */ | |
592 | if (!cd->rtable) { | |
5bc4b46a FF |
593 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
594 | GFP_KERNEL); | |
5e95329b FF |
595 | if (!cd->rtable) |
596 | return -ENOMEM; | |
597 | ||
598 | /* default to no valid uplink/downlink */ | |
599 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
600 | } | |
601 | ||
30303813 | 602 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
603 | |
604 | return 0; | |
5e95329b FF |
605 | } |
606 | ||
1e72e6f8 AL |
607 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
608 | struct dsa_chip_data *cd, | |
609 | int chip_index, int port_index, | |
610 | struct device_node *port, | |
611 | const char *port_name) | |
612 | { | |
613 | struct device_node *link; | |
614 | int link_index; | |
615 | int ret; | |
616 | ||
617 | for (link_index = 0;; link_index++) { | |
618 | link = of_parse_phandle(port, "link", link_index); | |
619 | if (!link) | |
620 | break; | |
621 | ||
622 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
623 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
624 | port_index, link); | |
625 | if (ret) | |
626 | return ret; | |
627 | } | |
628 | } | |
629 | return 0; | |
630 | } | |
631 | ||
21168245 FF |
632 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
633 | { | |
634 | int i; | |
635 | int port_index; | |
636 | ||
637 | for (i = 0; i < pd->nr_chips; i++) { | |
638 | port_index = 0; | |
5f64a7db | 639 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 640 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
641 | port_index++; |
642 | } | |
21168245 | 643 | kfree(pd->chip[i].rtable); |
e496ae69 RK |
644 | |
645 | /* Drop our reference to the MDIO bus device */ | |
646 | if (pd->chip[i].host_dev) | |
647 | put_device(pd->chip[i].host_dev); | |
21168245 FF |
648 | } |
649 | kfree(pd->chip); | |
650 | } | |
651 | ||
f1a26a06 | 652 | static int dsa_of_probe(struct device *dev) |
5e95329b | 653 | { |
f1a26a06 | 654 | struct device_node *np = dev->of_node; |
1e72e6f8 | 655 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 656 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 657 | struct net_device *ethernet_dev; |
5e95329b FF |
658 | struct dsa_platform_data *pd; |
659 | struct dsa_chip_data *cd; | |
660 | const char *port_name; | |
661 | int chip_index, port_index; | |
662 | const unsigned int *sw_addr, *port_reg; | |
cc30c163 AL |
663 | int gpio; |
664 | enum of_gpio_flags of_flags; | |
665 | unsigned long flags; | |
6793abb4 | 666 | u32 eeprom_len; |
21168245 | 667 | int ret; |
5e95329b FF |
668 | |
669 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
670 | if (!mdio) | |
671 | return -EINVAL; | |
672 | ||
673 | mdio_bus = of_mdio_find_bus(mdio); | |
674 | if (!mdio_bus) | |
b324c07a | 675 | return -EPROBE_DEFER; |
5e95329b FF |
676 | |
677 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
e496ae69 RK |
678 | if (!ethernet) { |
679 | ret = -EINVAL; | |
680 | goto out_put_mdio; | |
681 | } | |
5e95329b | 682 | |
769a0202 | 683 | ethernet_dev = of_find_net_device_by_node(ethernet); |
e496ae69 RK |
684 | if (!ethernet_dev) { |
685 | ret = -EPROBE_DEFER; | |
686 | goto out_put_mdio; | |
687 | } | |
5e95329b FF |
688 | |
689 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
e496ae69 RK |
690 | if (!pd) { |
691 | ret = -ENOMEM; | |
9861f720 | 692 | goto out_put_ethernet; |
e496ae69 | 693 | } |
5e95329b | 694 | |
f1a26a06 | 695 | dev->platform_data = pd; |
769a0202 | 696 | pd->of_netdev = ethernet_dev; |
e04449fc | 697 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
698 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
699 | pd->nr_chips = DSA_MAX_SWITCHES; | |
700 | ||
6f2aed6a FF |
701 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
702 | GFP_KERNEL); | |
5e95329b FF |
703 | if (!pd->chip) { |
704 | ret = -ENOMEM; | |
705 | goto out_free; | |
706 | } | |
707 | ||
d1c0b471 | 708 | chip_index = -1; |
5e95329b | 709 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 710 | chip_index++; |
5e95329b FF |
711 | cd = &pd->chip[chip_index]; |
712 | ||
fa981d9a | 713 | cd->of_node = child; |
e496ae69 RK |
714 | |
715 | /* When assigning the host device, increment its refcount */ | |
716 | cd->host_dev = get_device(&mdio_bus->dev); | |
5e95329b FF |
717 | |
718 | sw_addr = of_get_property(child, "reg", NULL); | |
719 | if (!sw_addr) | |
720 | continue; | |
721 | ||
722 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 723 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
724 | continue; |
725 | ||
50d4964f | 726 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
727 | cd->eeprom_len = eeprom_len; |
728 | ||
6bc6d0a8 AL |
729 | mdio = of_parse_phandle(child, "mii-bus", 0); |
730 | if (mdio) { | |
731 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
732 | if (!mdio_bus_switch) { | |
733 | ret = -EPROBE_DEFER; | |
734 | goto out_free_chip; | |
735 | } | |
e496ae69 RK |
736 | |
737 | /* Drop the mdio_bus device ref, replacing the host | |
738 | * device with the mdio_bus_switch device, keeping | |
739 | * the refcount from of_mdio_find_bus() above. | |
740 | */ | |
741 | put_device(cd->host_dev); | |
6bc6d0a8 AL |
742 | cd->host_dev = &mdio_bus_switch->dev; |
743 | } | |
cc30c163 AL |
744 | gpio = of_get_named_gpio_flags(child, "reset-gpios", 0, |
745 | &of_flags); | |
746 | if (gpio_is_valid(gpio)) { | |
747 | flags = (of_flags == OF_GPIO_ACTIVE_LOW ? | |
748 | GPIOF_ACTIVE_LOW : 0); | |
749 | ret = devm_gpio_request_one(dev, gpio, flags, | |
750 | "switch_reset"); | |
751 | if (ret) | |
752 | goto out_free_chip; | |
753 | ||
754 | cd->reset = gpio_to_desc(gpio); | |
755 | gpiod_direction_output(cd->reset, 0); | |
756 | } | |
6bc6d0a8 | 757 | |
5e95329b FF |
758 | for_each_available_child_of_node(child, port) { |
759 | port_reg = of_get_property(port, "reg", NULL); | |
760 | if (!port_reg) | |
761 | continue; | |
762 | ||
763 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
764 | if (port_index >= DSA_MAX_PORTS) |
765 | break; | |
5e95329b FF |
766 | |
767 | port_name = of_get_property(port, "label", NULL); | |
768 | if (!port_name) | |
769 | continue; | |
770 | ||
bd47497a FF |
771 | cd->port_dn[port_index] = port; |
772 | ||
5e95329b FF |
773 | cd->port_names[port_index] = kstrdup(port_name, |
774 | GFP_KERNEL); | |
775 | if (!cd->port_names[port_index]) { | |
776 | ret = -ENOMEM; | |
777 | goto out_free_chip; | |
778 | } | |
779 | ||
1e72e6f8 AL |
780 | ret = dsa_of_probe_links(pd, cd, chip_index, |
781 | port_index, port, port_name); | |
782 | if (ret) | |
783 | goto out_free_chip; | |
5e95329b | 784 | |
5e95329b FF |
785 | } |
786 | } | |
787 | ||
e496ae69 RK |
788 | /* The individual chips hold their own refcount on the mdio bus, |
789 | * so drop ours */ | |
790 | put_device(&mdio_bus->dev); | |
791 | ||
5e95329b FF |
792 | return 0; |
793 | ||
794 | out_free_chip: | |
21168245 | 795 | dsa_of_free_platform_data(pd); |
5e95329b FF |
796 | out_free: |
797 | kfree(pd); | |
f1a26a06 | 798 | dev->platform_data = NULL; |
9861f720 RK |
799 | out_put_ethernet: |
800 | put_device(ðernet_dev->dev); | |
e496ae69 RK |
801 | out_put_mdio: |
802 | put_device(&mdio_bus->dev); | |
5e95329b FF |
803 | return ret; |
804 | } | |
805 | ||
f1a26a06 | 806 | static void dsa_of_remove(struct device *dev) |
5e95329b | 807 | { |
f1a26a06 | 808 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 809 | |
f1a26a06 | 810 | if (!dev->of_node) |
5e95329b FF |
811 | return; |
812 | ||
21168245 | 813 | dsa_of_free_platform_data(pd); |
9861f720 | 814 | put_device(&pd->of_netdev->dev); |
5e95329b FF |
815 | kfree(pd); |
816 | } | |
817 | #else | |
f1a26a06 | 818 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
819 | { |
820 | return 0; | |
821 | } | |
822 | ||
f1a26a06 | 823 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
824 | { |
825 | } | |
826 | #endif | |
827 | ||
4d7f3e75 NA |
828 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
829 | struct device *parent, struct dsa_platform_data *pd) | |
c86e59b9 FF |
830 | { |
831 | int i; | |
4d7f3e75 | 832 | unsigned configured = 0; |
c86e59b9 FF |
833 | |
834 | dst->pd = pd; | |
835 | dst->master_netdev = dev; | |
836 | dst->cpu_switch = -1; | |
837 | dst->cpu_port = -1; | |
838 | ||
839 | for (i = 0; i < pd->nr_chips; i++) { | |
840 | struct dsa_switch *ds; | |
841 | ||
842 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
843 | if (IS_ERR(ds)) { | |
844 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
845 | i, PTR_ERR(ds)); | |
846 | continue; | |
847 | } | |
848 | ||
849 | dst->ds[i] = ds; | |
4d7f3e75 NA |
850 | |
851 | ++configured; | |
c86e59b9 FF |
852 | } |
853 | ||
4d7f3e75 NA |
854 | /* |
855 | * If no switch was found, exit cleanly | |
856 | */ | |
857 | if (!configured) | |
858 | return -EPROBE_DEFER; | |
859 | ||
c86e59b9 FF |
860 | /* |
861 | * If we use a tagging format that doesn't have an ethertype | |
862 | * field, make sure that all packets from this point on get | |
863 | * sent to the tag format's receive function. | |
864 | */ | |
865 | wmb(); | |
866 | dev->dsa_ptr = (void *)dst; | |
867 | ||
4d7f3e75 | 868 | return 0; |
c86e59b9 FF |
869 | } |
870 | ||
91da11f8 LB |
871 | static int dsa_probe(struct platform_device *pdev) |
872 | { | |
91da11f8 LB |
873 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
874 | struct net_device *dev; | |
e84665c9 | 875 | struct dsa_switch_tree *dst; |
c86e59b9 | 876 | int ret; |
91da11f8 | 877 | |
a2ae6007 JP |
878 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
879 | dsa_driver_version); | |
91da11f8 | 880 | |
5e95329b | 881 | if (pdev->dev.of_node) { |
f1a26a06 | 882 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
883 | if (ret) |
884 | return ret; | |
885 | ||
886 | pd = pdev->dev.platform_data; | |
887 | } | |
888 | ||
769a0202 | 889 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
890 | return -EINVAL; |
891 | ||
769a0202 FF |
892 | if (pd->of_netdev) { |
893 | dev = pd->of_netdev; | |
894 | dev_hold(dev); | |
895 | } else { | |
896 | dev = dev_to_net_device(pd->netdev); | |
897 | } | |
5e95329b | 898 | if (dev == NULL) { |
b324c07a | 899 | ret = -EPROBE_DEFER; |
5e95329b FF |
900 | goto out; |
901 | } | |
91da11f8 LB |
902 | |
903 | if (dev->dsa_ptr != NULL) { | |
904 | dev_put(dev); | |
5e95329b FF |
905 | ret = -EEXIST; |
906 | goto out; | |
91da11f8 LB |
907 | } |
908 | ||
d4ac35d6 | 909 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); |
e84665c9 | 910 | if (dst == NULL) { |
91da11f8 | 911 | dev_put(dev); |
5e95329b FF |
912 | ret = -ENOMEM; |
913 | goto out; | |
91da11f8 LB |
914 | } |
915 | ||
e84665c9 LB |
916 | platform_set_drvdata(pdev, dst); |
917 | ||
4d7f3e75 | 918 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); |
679fb46c NA |
919 | if (ret) { |
920 | dev_put(dev); | |
4d7f3e75 | 921 | goto out; |
679fb46c | 922 | } |
91da11f8 LB |
923 | |
924 | return 0; | |
5e95329b FF |
925 | |
926 | out: | |
f1a26a06 | 927 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
928 | |
929 | return ret; | |
91da11f8 LB |
930 | } |
931 | ||
c86e59b9 | 932 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 933 | { |
e84665c9 | 934 | int i; |
91da11f8 | 935 | |
04761890 NA |
936 | dst->master_netdev->dsa_ptr = NULL; |
937 | ||
938 | /* If we used a tagging format that doesn't have an ethertype | |
939 | * field, make sure that all packets from this point get sent | |
940 | * without the tag and go through the regular receive path. | |
941 | */ | |
942 | wmb(); | |
943 | ||
e84665c9 LB |
944 | for (i = 0; i < dst->pd->nr_chips; i++) { |
945 | struct dsa_switch *ds = dst->ds[i]; | |
946 | ||
d4ac35d6 | 947 | if (ds) |
e84665c9 LB |
948 | dsa_switch_destroy(ds); |
949 | } | |
679fb46c NA |
950 | |
951 | dev_put(dst->master_netdev); | |
c86e59b9 FF |
952 | } |
953 | ||
954 | static int dsa_remove(struct platform_device *pdev) | |
955 | { | |
956 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 957 | |
c86e59b9 | 958 | dsa_remove_dst(dst); |
f1a26a06 | 959 | dsa_of_remove(&pdev->dev); |
5e95329b | 960 | |
91da11f8 LB |
961 | return 0; |
962 | } | |
963 | ||
964 | static void dsa_shutdown(struct platform_device *pdev) | |
965 | { | |
966 | } | |
967 | ||
3e8a72d1 FF |
968 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
969 | struct packet_type *pt, struct net_device *orig_dev) | |
970 | { | |
971 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
972 | ||
973 | if (unlikely(dst == NULL)) { | |
974 | kfree_skb(skb); | |
975 | return 0; | |
976 | } | |
977 | ||
5075314e | 978 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
979 | } |
980 | ||
61b7363f | 981 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
982 | .type = cpu_to_be16(ETH_P_XDSA), |
983 | .func = dsa_switch_rcv, | |
984 | }; | |
985 | ||
b73adef6 FF |
986 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
987 | .notifier_call = dsa_slave_netdevice_event, | |
988 | }; | |
989 | ||
24462549 FF |
990 | #ifdef CONFIG_PM_SLEEP |
991 | static int dsa_suspend(struct device *d) | |
992 | { | |
993 | struct platform_device *pdev = to_platform_device(d); | |
994 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
995 | int i, ret = 0; | |
996 | ||
997 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
998 | struct dsa_switch *ds = dst->ds[i]; | |
999 | ||
1000 | if (ds != NULL) | |
1001 | ret = dsa_switch_suspend(ds); | |
1002 | } | |
1003 | ||
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | static int dsa_resume(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_resume(ds); | |
1018 | } | |
1019 | ||
1020 | return ret; | |
1021 | } | |
1022 | #endif | |
1023 | ||
1024 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
1025 | ||
5e95329b | 1026 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 1027 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
1028 | { .compatible = "marvell,dsa", }, |
1029 | {} | |
1030 | }; | |
1031 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
1032 | ||
91da11f8 LB |
1033 | static struct platform_driver dsa_driver = { |
1034 | .probe = dsa_probe, | |
1035 | .remove = dsa_remove, | |
1036 | .shutdown = dsa_shutdown, | |
1037 | .driver = { | |
1038 | .name = "dsa", | |
5e95329b | 1039 | .of_match_table = dsa_of_match_table, |
24462549 | 1040 | .pm = &dsa_pm_ops, |
91da11f8 LB |
1041 | }, |
1042 | }; | |
1043 | ||
1044 | static int __init dsa_init_module(void) | |
1045 | { | |
7df899c3 BH |
1046 | int rc; |
1047 | ||
b73adef6 FF |
1048 | register_netdevice_notifier(&dsa_netdevice_nb); |
1049 | ||
7df899c3 BH |
1050 | rc = platform_driver_register(&dsa_driver); |
1051 | if (rc) | |
1052 | return rc; | |
1053 | ||
3e8a72d1 FF |
1054 | dev_add_pack(&dsa_pack_type); |
1055 | ||
7df899c3 | 1056 | return 0; |
91da11f8 LB |
1057 | } |
1058 | module_init(dsa_init_module); | |
1059 | ||
1060 | static void __exit dsa_cleanup_module(void) | |
1061 | { | |
b73adef6 | 1062 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 1063 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
1064 | platform_driver_unregister(&dsa_driver); |
1065 | } | |
1066 | module_exit(dsa_cleanup_module); | |
1067 | ||
577d6a7c | 1068 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
1069 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
1070 | MODULE_LICENSE("GPL"); | |
1071 | MODULE_ALIAS("platform:dsa"); |