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 * | |
b4d2394d | 54 | dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name) |
91da11f8 LB |
55 | { |
56 | struct dsa_switch_driver *ret; | |
57 | struct list_head *list; | |
58 | char *name; | |
59 | ||
60 | ret = NULL; | |
61 | name = NULL; | |
62 | ||
63 | mutex_lock(&dsa_switch_drivers_mutex); | |
64 | list_for_each(list, &dsa_switch_drivers) { | |
65 | struct dsa_switch_driver *drv; | |
66 | ||
67 | drv = list_entry(list, struct dsa_switch_driver, list); | |
68 | ||
b4d2394d | 69 | name = drv->probe(host_dev, sw_addr); |
91da11f8 LB |
70 | if (name != NULL) { |
71 | ret = drv; | |
72 | break; | |
73 | } | |
74 | } | |
75 | mutex_unlock(&dsa_switch_drivers_mutex); | |
76 | ||
77 | *_name = name; | |
78 | ||
79 | return ret; | |
80 | } | |
81 | ||
51579c3f GR |
82 | /* hwmon support ************************************************************/ |
83 | ||
84 | #ifdef CONFIG_NET_DSA_HWMON | |
85 | ||
86 | static ssize_t temp1_input_show(struct device *dev, | |
87 | struct device_attribute *attr, char *buf) | |
88 | { | |
89 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
90 | int temp, ret; | |
91 | ||
92 | ret = ds->drv->get_temp(ds, &temp); | |
93 | if (ret < 0) | |
94 | return ret; | |
95 | ||
96 | return sprintf(buf, "%d\n", temp * 1000); | |
97 | } | |
98 | static DEVICE_ATTR_RO(temp1_input); | |
99 | ||
100 | static ssize_t temp1_max_show(struct device *dev, | |
101 | struct device_attribute *attr, char *buf) | |
102 | { | |
103 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
104 | int temp, ret; | |
105 | ||
106 | ret = ds->drv->get_temp_limit(ds, &temp); | |
107 | if (ret < 0) | |
108 | return ret; | |
109 | ||
110 | return sprintf(buf, "%d\n", temp * 1000); | |
111 | } | |
112 | ||
113 | static ssize_t temp1_max_store(struct device *dev, | |
114 | struct device_attribute *attr, const char *buf, | |
115 | size_t count) | |
116 | { | |
117 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
118 | int temp, ret; | |
119 | ||
120 | ret = kstrtoint(buf, 0, &temp); | |
121 | if (ret < 0) | |
122 | return ret; | |
123 | ||
124 | ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000)); | |
125 | if (ret < 0) | |
126 | return ret; | |
127 | ||
128 | return count; | |
129 | } | |
e3122b7f | 130 | static DEVICE_ATTR_RW(temp1_max); |
51579c3f GR |
131 | |
132 | static ssize_t temp1_max_alarm_show(struct device *dev, | |
133 | struct device_attribute *attr, char *buf) | |
134 | { | |
135 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
136 | bool alarm; | |
137 | int ret; | |
138 | ||
139 | ret = ds->drv->get_temp_alarm(ds, &alarm); | |
140 | if (ret < 0) | |
141 | return ret; | |
142 | ||
143 | return sprintf(buf, "%d\n", alarm); | |
144 | } | |
145 | static DEVICE_ATTR_RO(temp1_max_alarm); | |
146 | ||
147 | static struct attribute *dsa_hwmon_attrs[] = { | |
148 | &dev_attr_temp1_input.attr, /* 0 */ | |
149 | &dev_attr_temp1_max.attr, /* 1 */ | |
150 | &dev_attr_temp1_max_alarm.attr, /* 2 */ | |
151 | NULL | |
152 | }; | |
153 | ||
154 | static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj, | |
155 | struct attribute *attr, int index) | |
156 | { | |
157 | struct device *dev = container_of(kobj, struct device, kobj); | |
158 | struct dsa_switch *ds = dev_get_drvdata(dev); | |
159 | struct dsa_switch_driver *drv = ds->drv; | |
160 | umode_t mode = attr->mode; | |
161 | ||
162 | if (index == 1) { | |
163 | if (!drv->get_temp_limit) | |
164 | mode = 0; | |
e3122b7f VD |
165 | else if (!drv->set_temp_limit) |
166 | mode &= ~S_IWUSR; | |
51579c3f GR |
167 | } else if (index == 2 && !drv->get_temp_alarm) { |
168 | mode = 0; | |
169 | } | |
170 | return mode; | |
171 | } | |
172 | ||
173 | static const struct attribute_group dsa_hwmon_group = { | |
174 | .attrs = dsa_hwmon_attrs, | |
175 | .is_visible = dsa_hwmon_attrs_visible, | |
176 | }; | |
177 | __ATTRIBUTE_GROUPS(dsa_hwmon); | |
178 | ||
179 | #endif /* CONFIG_NET_DSA_HWMON */ | |
91da11f8 LB |
180 | |
181 | /* basic switch operations **************************************************/ | |
39b0c705 AL |
182 | static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master) |
183 | { | |
184 | struct dsa_chip_data *cd = ds->pd; | |
185 | struct device_node *port_dn; | |
186 | struct phy_device *phydev; | |
e4485346 | 187 | int ret, port, mode; |
39b0c705 AL |
188 | |
189 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
190 | if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))) | |
191 | continue; | |
192 | ||
193 | port_dn = cd->port_dn[port]; | |
194 | if (of_phy_is_fixed_link(port_dn)) { | |
195 | ret = of_phy_register_fixed_link(port_dn); | |
196 | if (ret) { | |
197 | netdev_err(master, | |
198 | "failed to register fixed PHY\n"); | |
199 | return ret; | |
200 | } | |
201 | phydev = of_phy_find_device(port_dn); | |
e4485346 AL |
202 | |
203 | mode = of_get_phy_mode(port_dn); | |
204 | if (mode < 0) | |
205 | mode = PHY_INTERFACE_MODE_NA; | |
206 | phydev->interface = mode; | |
207 | ||
39b0c705 AL |
208 | genphy_config_init(phydev); |
209 | genphy_read_status(phydev); | |
210 | if (ds->drv->adjust_link) | |
211 | ds->drv->adjust_link(ds, port, phydev); | |
212 | } | |
213 | } | |
214 | return 0; | |
215 | } | |
216 | ||
df197195 | 217 | static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent) |
91da11f8 | 218 | { |
df197195 FF |
219 | struct dsa_switch_driver *drv = ds->drv; |
220 | struct dsa_switch_tree *dst = ds->dst; | |
221 | struct dsa_chip_data *pd = ds->pd; | |
f9bf5a2c | 222 | bool valid_name_found = false; |
df197195 FF |
223 | int index = ds->index; |
224 | int i, ret; | |
91da11f8 LB |
225 | |
226 | /* | |
227 | * Validate supplied switch configuration. | |
228 | */ | |
91da11f8 LB |
229 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
230 | char *name; | |
231 | ||
232 | name = pd->port_names[i]; | |
233 | if (name == NULL) | |
234 | continue; | |
235 | ||
236 | if (!strcmp(name, "cpu")) { | |
e84665c9 | 237 | if (dst->cpu_switch != -1) { |
a2ae6007 JP |
238 | netdev_err(dst->master_netdev, |
239 | "multiple cpu ports?!\n"); | |
91da11f8 LB |
240 | ret = -EINVAL; |
241 | goto out; | |
242 | } | |
e84665c9 LB |
243 | dst->cpu_switch = index; |
244 | dst->cpu_port = i; | |
245 | } else if (!strcmp(name, "dsa")) { | |
246 | ds->dsa_port_mask |= 1 << i; | |
91da11f8 | 247 | } else { |
e84665c9 | 248 | ds->phys_port_mask |= 1 << i; |
91da11f8 | 249 | } |
f9bf5a2c | 250 | valid_name_found = true; |
91da11f8 LB |
251 | } |
252 | ||
f9bf5a2c FF |
253 | if (!valid_name_found && i == DSA_MAX_PORTS) { |
254 | ret = -EINVAL; | |
255 | goto out; | |
256 | } | |
91da11f8 | 257 | |
0d8bcdd3 FF |
258 | /* Make the built-in MII bus mask match the number of ports, |
259 | * switch drivers can override this later | |
260 | */ | |
261 | ds->phys_mii_mask = ds->phys_port_mask; | |
262 | ||
91da11f8 | 263 | /* |
e84665c9 LB |
264 | * If the CPU connects to this switch, set the switch tree |
265 | * tagging protocol to the preferred tagging format of this | |
266 | * switch. | |
91da11f8 | 267 | */ |
5075314e | 268 | if (dst->cpu_switch == index) { |
59299031 | 269 | switch (ds->tag_protocol) { |
5075314e AD |
270 | #ifdef CONFIG_NET_DSA_TAG_DSA |
271 | case DSA_TAG_PROTO_DSA: | |
272 | dst->rcv = dsa_netdev_ops.rcv; | |
273 | break; | |
274 | #endif | |
275 | #ifdef CONFIG_NET_DSA_TAG_EDSA | |
276 | case DSA_TAG_PROTO_EDSA: | |
277 | dst->rcv = edsa_netdev_ops.rcv; | |
278 | break; | |
279 | #endif | |
280 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
281 | case DSA_TAG_PROTO_TRAILER: | |
282 | dst->rcv = trailer_netdev_ops.rcv; | |
283 | break; | |
284 | #endif | |
285 | #ifdef CONFIG_NET_DSA_TAG_BRCM | |
286 | case DSA_TAG_PROTO_BRCM: | |
287 | dst->rcv = brcm_netdev_ops.rcv; | |
288 | break; | |
289 | #endif | |
ae439286 | 290 | case DSA_TAG_PROTO_NONE: |
5075314e | 291 | break; |
ae439286 AL |
292 | default: |
293 | ret = -ENOPROTOOPT; | |
294 | goto out; | |
5075314e | 295 | } |
91da11f8 | 296 | |
59299031 | 297 | dst->tag_protocol = ds->tag_protocol; |
5075314e | 298 | } |
91da11f8 LB |
299 | |
300 | /* | |
301 | * Do basic register setup. | |
302 | */ | |
303 | ret = drv->setup(ds); | |
304 | if (ret < 0) | |
305 | goto out; | |
306 | ||
e84665c9 | 307 | ret = drv->set_addr(ds, dst->master_netdev->dev_addr); |
91da11f8 LB |
308 | if (ret < 0) |
309 | goto out; | |
310 | ||
d4ac35d6 | 311 | ds->slave_mii_bus = devm_mdiobus_alloc(parent); |
91da11f8 LB |
312 | if (ds->slave_mii_bus == NULL) { |
313 | ret = -ENOMEM; | |
314 | goto out; | |
315 | } | |
316 | dsa_slave_mii_bus_init(ds); | |
317 | ||
318 | ret = mdiobus_register(ds->slave_mii_bus); | |
319 | if (ret < 0) | |
d4ac35d6 | 320 | goto out; |
91da11f8 LB |
321 | |
322 | ||
323 | /* | |
324 | * Create network devices for physical switch ports. | |
325 | */ | |
91da11f8 | 326 | for (i = 0; i < DSA_MAX_PORTS; i++) { |
e84665c9 | 327 | if (!(ds->phys_port_mask & (1 << i))) |
91da11f8 LB |
328 | continue; |
329 | ||
d87d6f44 GR |
330 | ret = dsa_slave_create(ds, parent, i, pd->port_names[i]); |
331 | if (ret < 0) { | |
d25b8e74 RK |
332 | netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n", |
333 | index, i, pd->port_names[i], ret); | |
d87d6f44 | 334 | ret = 0; |
91da11f8 | 335 | } |
91da11f8 LB |
336 | } |
337 | ||
39b0c705 AL |
338 | /* Perform configuration of the CPU and DSA ports */ |
339 | ret = dsa_cpu_dsa_setup(ds, dst->master_netdev); | |
340 | if (ret < 0) { | |
341 | netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n", | |
342 | index); | |
343 | ret = 0; | |
344 | } | |
345 | ||
51579c3f GR |
346 | #ifdef CONFIG_NET_DSA_HWMON |
347 | /* If the switch provides a temperature sensor, | |
348 | * register with hardware monitoring subsystem. | |
349 | * Treat registration error as non-fatal and ignore it. | |
350 | */ | |
351 | if (drv->get_temp) { | |
352 | const char *netname = netdev_name(dst->master_netdev); | |
353 | char hname[IFNAMSIZ + 1]; | |
354 | int i, j; | |
355 | ||
356 | /* Create valid hwmon 'name' attribute */ | |
357 | for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) { | |
358 | if (isalnum(netname[i])) | |
359 | hname[j++] = netname[i]; | |
360 | } | |
361 | hname[j] = '\0'; | |
362 | scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d", | |
363 | hname, index); | |
364 | ds->hwmon_dev = hwmon_device_register_with_groups(NULL, | |
365 | ds->hwmon_name, ds, dsa_hwmon_groups); | |
366 | if (IS_ERR(ds->hwmon_dev)) | |
367 | ds->hwmon_dev = NULL; | |
368 | } | |
369 | #endif /* CONFIG_NET_DSA_HWMON */ | |
370 | ||
df197195 | 371 | return ret; |
91da11f8 | 372 | |
91da11f8 | 373 | out: |
df197195 FF |
374 | return ret; |
375 | } | |
376 | ||
377 | static struct dsa_switch * | |
378 | dsa_switch_setup(struct dsa_switch_tree *dst, int index, | |
379 | struct device *parent, struct device *host_dev) | |
380 | { | |
381 | struct dsa_chip_data *pd = dst->pd->chip + index; | |
382 | struct dsa_switch_driver *drv; | |
383 | struct dsa_switch *ds; | |
384 | int ret; | |
385 | char *name; | |
386 | ||
387 | /* | |
388 | * Probe for switch model. | |
389 | */ | |
390 | drv = dsa_switch_probe(host_dev, pd->sw_addr, &name); | |
391 | if (drv == NULL) { | |
392 | netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n", | |
393 | index); | |
394 | return ERR_PTR(-EINVAL); | |
395 | } | |
396 | netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n", | |
397 | index, name); | |
398 | ||
399 | ||
400 | /* | |
401 | * Allocate and initialise switch state. | |
402 | */ | |
d4ac35d6 | 403 | ds = devm_kzalloc(parent, sizeof(*ds) + drv->priv_size, GFP_KERNEL); |
df197195 | 404 | if (ds == NULL) |
24595346 | 405 | return ERR_PTR(-ENOMEM); |
df197195 FF |
406 | |
407 | ds->dst = dst; | |
408 | ds->index = index; | |
409 | ds->pd = pd; | |
410 | ds->drv = drv; | |
59299031 | 411 | ds->tag_protocol = drv->tag_protocol; |
df197195 FF |
412 | ds->master_dev = host_dev; |
413 | ||
414 | ret = dsa_switch_setup_one(ds, parent); | |
415 | if (ret) | |
24595346 | 416 | return ERR_PTR(ret); |
df197195 FF |
417 | |
418 | return ds; | |
91da11f8 LB |
419 | } |
420 | ||
421 | static void dsa_switch_destroy(struct dsa_switch *ds) | |
422 | { | |
cbc5d90b NA |
423 | struct device_node *port_dn; |
424 | struct phy_device *phydev; | |
425 | struct dsa_chip_data *cd = ds->pd; | |
426 | int port; | |
427 | ||
51579c3f GR |
428 | #ifdef CONFIG_NET_DSA_HWMON |
429 | if (ds->hwmon_dev) | |
430 | hwmon_device_unregister(ds->hwmon_dev); | |
431 | #endif | |
cbc5d90b | 432 | |
3a44514f AL |
433 | /* Destroy network devices for physical switch ports. */ |
434 | for (port = 0; port < DSA_MAX_PORTS; port++) { | |
435 | if (!(ds->phys_port_mask & (1 << port))) | |
436 | continue; | |
437 | ||
438 | if (!ds->ports[port]) | |
439 | continue; | |
440 | ||
441 | dsa_slave_destroy(ds->ports[port]); | |
442 | } | |
443 | ||
444 | /* Remove any fixed link PHYs */ | |
cbc5d90b | 445 | for (port = 0; port < DSA_MAX_PORTS; port++) { |
cbc5d90b NA |
446 | port_dn = cd->port_dn[port]; |
447 | if (of_phy_is_fixed_link(port_dn)) { | |
448 | phydev = of_phy_find_device(port_dn); | |
449 | if (phydev) { | |
cbc5d90b NA |
450 | phy_device_free(phydev); |
451 | of_node_put(port_dn); | |
5bcbe0f3 | 452 | fixed_phy_unregister(phydev); |
cbc5d90b NA |
453 | } |
454 | } | |
455 | } | |
456 | ||
e410ddb8 | 457 | mdiobus_unregister(ds->slave_mii_bus); |
91da11f8 LB |
458 | } |
459 | ||
e506d405 | 460 | #ifdef CONFIG_PM_SLEEP |
24462549 FF |
461 | static int dsa_switch_suspend(struct dsa_switch *ds) |
462 | { | |
463 | int i, ret = 0; | |
464 | ||
465 | /* Suspend slave network devices */ | |
466 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 467 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
468 | continue; |
469 | ||
470 | ret = dsa_slave_suspend(ds->ports[i]); | |
471 | if (ret) | |
472 | return ret; | |
473 | } | |
474 | ||
475 | if (ds->drv->suspend) | |
476 | ret = ds->drv->suspend(ds); | |
477 | ||
478 | return ret; | |
479 | } | |
480 | ||
481 | static int dsa_switch_resume(struct dsa_switch *ds) | |
482 | { | |
483 | int i, ret = 0; | |
484 | ||
485 | if (ds->drv->resume) | |
486 | ret = ds->drv->resume(ds); | |
487 | ||
488 | if (ret) | |
489 | return ret; | |
490 | ||
491 | /* Resume slave network devices */ | |
492 | for (i = 0; i < DSA_MAX_PORTS; i++) { | |
d79d2107 | 493 | if (!dsa_is_port_initialized(ds, i)) |
24462549 FF |
494 | continue; |
495 | ||
496 | ret = dsa_slave_resume(ds->ports[i]); | |
497 | if (ret) | |
498 | return ret; | |
499 | } | |
500 | ||
501 | return 0; | |
502 | } | |
e506d405 | 503 | #endif |
24462549 | 504 | |
91da11f8 LB |
505 | /* platform driver init and cleanup *****************************************/ |
506 | static int dev_is_class(struct device *dev, void *class) | |
507 | { | |
508 | if (dev->class != NULL && !strcmp(dev->class->name, class)) | |
509 | return 1; | |
510 | ||
511 | return 0; | |
512 | } | |
513 | ||
514 | static struct device *dev_find_class(struct device *parent, char *class) | |
515 | { | |
516 | if (dev_is_class(parent, class)) { | |
517 | get_device(parent); | |
518 | return parent; | |
519 | } | |
520 | ||
521 | return device_find_child(parent, class, dev_is_class); | |
522 | } | |
523 | ||
b4d2394d | 524 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev) |
91da11f8 LB |
525 | { |
526 | struct device *d; | |
527 | ||
528 | d = dev_find_class(dev, "mdio_bus"); | |
529 | if (d != NULL) { | |
530 | struct mii_bus *bus; | |
531 | ||
532 | bus = to_mii_bus(d); | |
533 | put_device(d); | |
534 | ||
535 | return bus; | |
536 | } | |
537 | ||
538 | return NULL; | |
539 | } | |
b4d2394d | 540 | EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus); |
91da11f8 LB |
541 | |
542 | static struct net_device *dev_to_net_device(struct device *dev) | |
543 | { | |
544 | struct device *d; | |
545 | ||
546 | d = dev_find_class(dev, "net"); | |
547 | if (d != NULL) { | |
548 | struct net_device *nd; | |
549 | ||
550 | nd = to_net_dev(d); | |
551 | dev_hold(nd); | |
552 | put_device(d); | |
553 | ||
554 | return nd; | |
555 | } | |
556 | ||
557 | return NULL; | |
558 | } | |
559 | ||
5e95329b FF |
560 | #ifdef CONFIG_OF |
561 | static int dsa_of_setup_routing_table(struct dsa_platform_data *pd, | |
562 | struct dsa_chip_data *cd, | |
30303813 | 563 | int chip_index, int port_index, |
5e95329b FF |
564 | struct device_node *link) |
565 | { | |
5e95329b | 566 | const __be32 *reg; |
5e95329b FF |
567 | int link_sw_addr; |
568 | struct device_node *parent_sw; | |
569 | int len; | |
570 | ||
571 | parent_sw = of_get_parent(link); | |
572 | if (!parent_sw) | |
573 | return -EINVAL; | |
574 | ||
575 | reg = of_get_property(parent_sw, "reg", &len); | |
576 | if (!reg || (len != sizeof(*reg) * 2)) | |
577 | return -EINVAL; | |
578 | ||
30303813 PN |
579 | /* |
580 | * Get the destination switch number from the second field of its 'reg' | |
581 | * property, i.e. for "reg = <0x19 1>" sw_addr is '1'. | |
582 | */ | |
5e95329b FF |
583 | link_sw_addr = be32_to_cpup(reg + 1); |
584 | ||
585 | if (link_sw_addr >= pd->nr_chips) | |
586 | return -EINVAL; | |
587 | ||
588 | /* First time routing table allocation */ | |
589 | if (!cd->rtable) { | |
5bc4b46a FF |
590 | cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8), |
591 | GFP_KERNEL); | |
5e95329b FF |
592 | if (!cd->rtable) |
593 | return -ENOMEM; | |
594 | ||
595 | /* default to no valid uplink/downlink */ | |
596 | memset(cd->rtable, -1, pd->nr_chips * sizeof(s8)); | |
597 | } | |
598 | ||
30303813 | 599 | cd->rtable[link_sw_addr] = port_index; |
5e95329b FF |
600 | |
601 | return 0; | |
5e95329b FF |
602 | } |
603 | ||
1e72e6f8 AL |
604 | static int dsa_of_probe_links(struct dsa_platform_data *pd, |
605 | struct dsa_chip_data *cd, | |
606 | int chip_index, int port_index, | |
607 | struct device_node *port, | |
608 | const char *port_name) | |
609 | { | |
610 | struct device_node *link; | |
611 | int link_index; | |
612 | int ret; | |
613 | ||
614 | for (link_index = 0;; link_index++) { | |
615 | link = of_parse_phandle(port, "link", link_index); | |
616 | if (!link) | |
617 | break; | |
618 | ||
619 | if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) { | |
620 | ret = dsa_of_setup_routing_table(pd, cd, chip_index, | |
621 | port_index, link); | |
622 | if (ret) | |
623 | return ret; | |
624 | } | |
625 | } | |
626 | return 0; | |
627 | } | |
628 | ||
21168245 FF |
629 | static void dsa_of_free_platform_data(struct dsa_platform_data *pd) |
630 | { | |
631 | int i; | |
632 | int port_index; | |
633 | ||
634 | for (i = 0; i < pd->nr_chips; i++) { | |
635 | port_index = 0; | |
5f64a7db | 636 | while (port_index < DSA_MAX_PORTS) { |
1f74714f | 637 | kfree(pd->chip[i].port_names[port_index]); |
5f64a7db FF |
638 | port_index++; |
639 | } | |
21168245 | 640 | kfree(pd->chip[i].rtable); |
e496ae69 RK |
641 | |
642 | /* Drop our reference to the MDIO bus device */ | |
643 | if (pd->chip[i].host_dev) | |
644 | put_device(pd->chip[i].host_dev); | |
21168245 FF |
645 | } |
646 | kfree(pd->chip); | |
647 | } | |
648 | ||
f1a26a06 | 649 | static int dsa_of_probe(struct device *dev) |
5e95329b | 650 | { |
f1a26a06 | 651 | struct device_node *np = dev->of_node; |
1e72e6f8 | 652 | struct device_node *child, *mdio, *ethernet, *port; |
6bc6d0a8 | 653 | struct mii_bus *mdio_bus, *mdio_bus_switch; |
769a0202 | 654 | struct net_device *ethernet_dev; |
5e95329b FF |
655 | struct dsa_platform_data *pd; |
656 | struct dsa_chip_data *cd; | |
657 | const char *port_name; | |
658 | int chip_index, port_index; | |
659 | const unsigned int *sw_addr, *port_reg; | |
cc30c163 AL |
660 | int gpio; |
661 | enum of_gpio_flags of_flags; | |
662 | unsigned long flags; | |
6793abb4 | 663 | u32 eeprom_len; |
21168245 | 664 | int ret; |
5e95329b FF |
665 | |
666 | mdio = of_parse_phandle(np, "dsa,mii-bus", 0); | |
667 | if (!mdio) | |
668 | return -EINVAL; | |
669 | ||
670 | mdio_bus = of_mdio_find_bus(mdio); | |
671 | if (!mdio_bus) | |
b324c07a | 672 | return -EPROBE_DEFER; |
5e95329b FF |
673 | |
674 | ethernet = of_parse_phandle(np, "dsa,ethernet", 0); | |
e496ae69 RK |
675 | if (!ethernet) { |
676 | ret = -EINVAL; | |
677 | goto out_put_mdio; | |
678 | } | |
5e95329b | 679 | |
769a0202 | 680 | ethernet_dev = of_find_net_device_by_node(ethernet); |
e496ae69 RK |
681 | if (!ethernet_dev) { |
682 | ret = -EPROBE_DEFER; | |
683 | goto out_put_mdio; | |
684 | } | |
5e95329b FF |
685 | |
686 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); | |
e496ae69 RK |
687 | if (!pd) { |
688 | ret = -ENOMEM; | |
9861f720 | 689 | goto out_put_ethernet; |
e496ae69 | 690 | } |
5e95329b | 691 | |
f1a26a06 | 692 | dev->platform_data = pd; |
769a0202 | 693 | pd->of_netdev = ethernet_dev; |
e04449fc | 694 | pd->nr_chips = of_get_available_child_count(np); |
5e95329b FF |
695 | if (pd->nr_chips > DSA_MAX_SWITCHES) |
696 | pd->nr_chips = DSA_MAX_SWITCHES; | |
697 | ||
6f2aed6a FF |
698 | pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data), |
699 | GFP_KERNEL); | |
5e95329b FF |
700 | if (!pd->chip) { |
701 | ret = -ENOMEM; | |
702 | goto out_free; | |
703 | } | |
704 | ||
d1c0b471 | 705 | chip_index = -1; |
5e95329b | 706 | for_each_available_child_of_node(np, child) { |
d1c0b471 | 707 | chip_index++; |
5e95329b FF |
708 | cd = &pd->chip[chip_index]; |
709 | ||
fa981d9a | 710 | cd->of_node = child; |
e496ae69 RK |
711 | |
712 | /* When assigning the host device, increment its refcount */ | |
713 | cd->host_dev = get_device(&mdio_bus->dev); | |
5e95329b FF |
714 | |
715 | sw_addr = of_get_property(child, "reg", NULL); | |
716 | if (!sw_addr) | |
717 | continue; | |
718 | ||
719 | cd->sw_addr = be32_to_cpup(sw_addr); | |
c8cf89f7 | 720 | if (cd->sw_addr >= PHY_MAX_ADDR) |
5e95329b FF |
721 | continue; |
722 | ||
50d4964f | 723 | if (!of_property_read_u32(child, "eeprom-length", &eeprom_len)) |
6793abb4 GR |
724 | cd->eeprom_len = eeprom_len; |
725 | ||
6bc6d0a8 AL |
726 | mdio = of_parse_phandle(child, "mii-bus", 0); |
727 | if (mdio) { | |
728 | mdio_bus_switch = of_mdio_find_bus(mdio); | |
729 | if (!mdio_bus_switch) { | |
730 | ret = -EPROBE_DEFER; | |
731 | goto out_free_chip; | |
732 | } | |
e496ae69 RK |
733 | |
734 | /* Drop the mdio_bus device ref, replacing the host | |
735 | * device with the mdio_bus_switch device, keeping | |
736 | * the refcount from of_mdio_find_bus() above. | |
737 | */ | |
738 | put_device(cd->host_dev); | |
6bc6d0a8 AL |
739 | cd->host_dev = &mdio_bus_switch->dev; |
740 | } | |
cc30c163 AL |
741 | gpio = of_get_named_gpio_flags(child, "reset-gpios", 0, |
742 | &of_flags); | |
743 | if (gpio_is_valid(gpio)) { | |
744 | flags = (of_flags == OF_GPIO_ACTIVE_LOW ? | |
745 | GPIOF_ACTIVE_LOW : 0); | |
746 | ret = devm_gpio_request_one(dev, gpio, flags, | |
747 | "switch_reset"); | |
748 | if (ret) | |
749 | goto out_free_chip; | |
750 | ||
751 | cd->reset = gpio_to_desc(gpio); | |
752 | gpiod_direction_output(cd->reset, 0); | |
753 | } | |
6bc6d0a8 | 754 | |
5e95329b FF |
755 | for_each_available_child_of_node(child, port) { |
756 | port_reg = of_get_property(port, "reg", NULL); | |
757 | if (!port_reg) | |
758 | continue; | |
759 | ||
760 | port_index = be32_to_cpup(port_reg); | |
8f5063e9 FF |
761 | if (port_index >= DSA_MAX_PORTS) |
762 | break; | |
5e95329b FF |
763 | |
764 | port_name = of_get_property(port, "label", NULL); | |
765 | if (!port_name) | |
766 | continue; | |
767 | ||
bd47497a FF |
768 | cd->port_dn[port_index] = port; |
769 | ||
5e95329b FF |
770 | cd->port_names[port_index] = kstrdup(port_name, |
771 | GFP_KERNEL); | |
772 | if (!cd->port_names[port_index]) { | |
773 | ret = -ENOMEM; | |
774 | goto out_free_chip; | |
775 | } | |
776 | ||
1e72e6f8 AL |
777 | ret = dsa_of_probe_links(pd, cd, chip_index, |
778 | port_index, port, port_name); | |
779 | if (ret) | |
780 | goto out_free_chip; | |
5e95329b | 781 | |
5e95329b FF |
782 | } |
783 | } | |
784 | ||
e496ae69 RK |
785 | /* The individual chips hold their own refcount on the mdio bus, |
786 | * so drop ours */ | |
787 | put_device(&mdio_bus->dev); | |
788 | ||
5e95329b FF |
789 | return 0; |
790 | ||
791 | out_free_chip: | |
21168245 | 792 | dsa_of_free_platform_data(pd); |
5e95329b FF |
793 | out_free: |
794 | kfree(pd); | |
f1a26a06 | 795 | dev->platform_data = NULL; |
9861f720 RK |
796 | out_put_ethernet: |
797 | put_device(ðernet_dev->dev); | |
e496ae69 RK |
798 | out_put_mdio: |
799 | put_device(&mdio_bus->dev); | |
5e95329b FF |
800 | return ret; |
801 | } | |
802 | ||
f1a26a06 | 803 | static void dsa_of_remove(struct device *dev) |
5e95329b | 804 | { |
f1a26a06 | 805 | struct dsa_platform_data *pd = dev->platform_data; |
5e95329b | 806 | |
f1a26a06 | 807 | if (!dev->of_node) |
5e95329b FF |
808 | return; |
809 | ||
21168245 | 810 | dsa_of_free_platform_data(pd); |
9861f720 | 811 | put_device(&pd->of_netdev->dev); |
5e95329b FF |
812 | kfree(pd); |
813 | } | |
814 | #else | |
f1a26a06 | 815 | static inline int dsa_of_probe(struct device *dev) |
5e95329b FF |
816 | { |
817 | return 0; | |
818 | } | |
819 | ||
f1a26a06 | 820 | static inline void dsa_of_remove(struct device *dev) |
5e95329b FF |
821 | { |
822 | } | |
823 | #endif | |
824 | ||
4d7f3e75 NA |
825 | static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev, |
826 | struct device *parent, struct dsa_platform_data *pd) | |
c86e59b9 FF |
827 | { |
828 | int i; | |
4d7f3e75 | 829 | unsigned configured = 0; |
c86e59b9 FF |
830 | |
831 | dst->pd = pd; | |
832 | dst->master_netdev = dev; | |
833 | dst->cpu_switch = -1; | |
834 | dst->cpu_port = -1; | |
835 | ||
836 | for (i = 0; i < pd->nr_chips; i++) { | |
837 | struct dsa_switch *ds; | |
838 | ||
839 | ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev); | |
840 | if (IS_ERR(ds)) { | |
841 | netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n", | |
842 | i, PTR_ERR(ds)); | |
843 | continue; | |
844 | } | |
845 | ||
846 | dst->ds[i] = ds; | |
4d7f3e75 NA |
847 | |
848 | ++configured; | |
c86e59b9 FF |
849 | } |
850 | ||
4d7f3e75 NA |
851 | /* |
852 | * If no switch was found, exit cleanly | |
853 | */ | |
854 | if (!configured) | |
855 | return -EPROBE_DEFER; | |
856 | ||
c86e59b9 FF |
857 | /* |
858 | * If we use a tagging format that doesn't have an ethertype | |
859 | * field, make sure that all packets from this point on get | |
860 | * sent to the tag format's receive function. | |
861 | */ | |
862 | wmb(); | |
863 | dev->dsa_ptr = (void *)dst; | |
864 | ||
4d7f3e75 | 865 | return 0; |
c86e59b9 FF |
866 | } |
867 | ||
91da11f8 LB |
868 | static int dsa_probe(struct platform_device *pdev) |
869 | { | |
91da11f8 LB |
870 | struct dsa_platform_data *pd = pdev->dev.platform_data; |
871 | struct net_device *dev; | |
e84665c9 | 872 | struct dsa_switch_tree *dst; |
c86e59b9 | 873 | int ret; |
91da11f8 | 874 | |
a2ae6007 JP |
875 | pr_notice_once("Distributed Switch Architecture driver version %s\n", |
876 | dsa_driver_version); | |
91da11f8 | 877 | |
5e95329b | 878 | if (pdev->dev.of_node) { |
f1a26a06 | 879 | ret = dsa_of_probe(&pdev->dev); |
5e95329b FF |
880 | if (ret) |
881 | return ret; | |
882 | ||
883 | pd = pdev->dev.platform_data; | |
884 | } | |
885 | ||
769a0202 | 886 | if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL)) |
91da11f8 LB |
887 | return -EINVAL; |
888 | ||
769a0202 FF |
889 | if (pd->of_netdev) { |
890 | dev = pd->of_netdev; | |
891 | dev_hold(dev); | |
892 | } else { | |
893 | dev = dev_to_net_device(pd->netdev); | |
894 | } | |
5e95329b | 895 | if (dev == NULL) { |
b324c07a | 896 | ret = -EPROBE_DEFER; |
5e95329b FF |
897 | goto out; |
898 | } | |
91da11f8 LB |
899 | |
900 | if (dev->dsa_ptr != NULL) { | |
901 | dev_put(dev); | |
5e95329b FF |
902 | ret = -EEXIST; |
903 | goto out; | |
91da11f8 LB |
904 | } |
905 | ||
d4ac35d6 | 906 | dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); |
e84665c9 | 907 | if (dst == NULL) { |
91da11f8 | 908 | dev_put(dev); |
5e95329b FF |
909 | ret = -ENOMEM; |
910 | goto out; | |
91da11f8 LB |
911 | } |
912 | ||
e84665c9 LB |
913 | platform_set_drvdata(pdev, dst); |
914 | ||
4d7f3e75 | 915 | ret = dsa_setup_dst(dst, dev, &pdev->dev, pd); |
679fb46c NA |
916 | if (ret) { |
917 | dev_put(dev); | |
4d7f3e75 | 918 | goto out; |
679fb46c | 919 | } |
91da11f8 LB |
920 | |
921 | return 0; | |
5e95329b FF |
922 | |
923 | out: | |
f1a26a06 | 924 | dsa_of_remove(&pdev->dev); |
5e95329b FF |
925 | |
926 | return ret; | |
91da11f8 LB |
927 | } |
928 | ||
c86e59b9 | 929 | static void dsa_remove_dst(struct dsa_switch_tree *dst) |
91da11f8 | 930 | { |
e84665c9 | 931 | int i; |
91da11f8 | 932 | |
04761890 NA |
933 | dst->master_netdev->dsa_ptr = NULL; |
934 | ||
935 | /* If we used a tagging format that doesn't have an ethertype | |
936 | * field, make sure that all packets from this point get sent | |
937 | * without the tag and go through the regular receive path. | |
938 | */ | |
939 | wmb(); | |
940 | ||
e84665c9 LB |
941 | for (i = 0; i < dst->pd->nr_chips; i++) { |
942 | struct dsa_switch *ds = dst->ds[i]; | |
943 | ||
d4ac35d6 | 944 | if (ds) |
e84665c9 LB |
945 | dsa_switch_destroy(ds); |
946 | } | |
679fb46c NA |
947 | |
948 | dev_put(dst->master_netdev); | |
c86e59b9 FF |
949 | } |
950 | ||
951 | static int dsa_remove(struct platform_device *pdev) | |
952 | { | |
953 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
91da11f8 | 954 | |
c86e59b9 | 955 | dsa_remove_dst(dst); |
f1a26a06 | 956 | dsa_of_remove(&pdev->dev); |
5e95329b | 957 | |
91da11f8 LB |
958 | return 0; |
959 | } | |
960 | ||
961 | static void dsa_shutdown(struct platform_device *pdev) | |
962 | { | |
963 | } | |
964 | ||
3e8a72d1 FF |
965 | static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev, |
966 | struct packet_type *pt, struct net_device *orig_dev) | |
967 | { | |
968 | struct dsa_switch_tree *dst = dev->dsa_ptr; | |
969 | ||
970 | if (unlikely(dst == NULL)) { | |
971 | kfree_skb(skb); | |
972 | return 0; | |
973 | } | |
974 | ||
5075314e | 975 | return dst->rcv(skb, dev, pt, orig_dev); |
3e8a72d1 FF |
976 | } |
977 | ||
61b7363f | 978 | static struct packet_type dsa_pack_type __read_mostly = { |
3e8a72d1 FF |
979 | .type = cpu_to_be16(ETH_P_XDSA), |
980 | .func = dsa_switch_rcv, | |
981 | }; | |
982 | ||
b73adef6 FF |
983 | static struct notifier_block dsa_netdevice_nb __read_mostly = { |
984 | .notifier_call = dsa_slave_netdevice_event, | |
985 | }; | |
986 | ||
24462549 FF |
987 | #ifdef CONFIG_PM_SLEEP |
988 | static int dsa_suspend(struct device *d) | |
989 | { | |
990 | struct platform_device *pdev = to_platform_device(d); | |
991 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
992 | int i, ret = 0; | |
993 | ||
994 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
995 | struct dsa_switch *ds = dst->ds[i]; | |
996 | ||
997 | if (ds != NULL) | |
998 | ret = dsa_switch_suspend(ds); | |
999 | } | |
1000 | ||
1001 | return ret; | |
1002 | } | |
1003 | ||
1004 | static int dsa_resume(struct device *d) | |
1005 | { | |
1006 | struct platform_device *pdev = to_platform_device(d); | |
1007 | struct dsa_switch_tree *dst = platform_get_drvdata(pdev); | |
1008 | int i, ret = 0; | |
1009 | ||
1010 | for (i = 0; i < dst->pd->nr_chips; i++) { | |
1011 | struct dsa_switch *ds = dst->ds[i]; | |
1012 | ||
1013 | if (ds != NULL) | |
1014 | ret = dsa_switch_resume(ds); | |
1015 | } | |
1016 | ||
1017 | return ret; | |
1018 | } | |
1019 | #endif | |
1020 | ||
1021 | static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume); | |
1022 | ||
5e95329b | 1023 | static const struct of_device_id dsa_of_match_table[] = { |
246d7f77 | 1024 | { .compatible = "brcm,bcm7445-switch-v4.0" }, |
5e95329b FF |
1025 | { .compatible = "marvell,dsa", }, |
1026 | {} | |
1027 | }; | |
1028 | MODULE_DEVICE_TABLE(of, dsa_of_match_table); | |
1029 | ||
91da11f8 LB |
1030 | static struct platform_driver dsa_driver = { |
1031 | .probe = dsa_probe, | |
1032 | .remove = dsa_remove, | |
1033 | .shutdown = dsa_shutdown, | |
1034 | .driver = { | |
1035 | .name = "dsa", | |
5e95329b | 1036 | .of_match_table = dsa_of_match_table, |
24462549 | 1037 | .pm = &dsa_pm_ops, |
91da11f8 LB |
1038 | }, |
1039 | }; | |
1040 | ||
1041 | static int __init dsa_init_module(void) | |
1042 | { | |
7df899c3 BH |
1043 | int rc; |
1044 | ||
b73adef6 FF |
1045 | register_netdevice_notifier(&dsa_netdevice_nb); |
1046 | ||
7df899c3 BH |
1047 | rc = platform_driver_register(&dsa_driver); |
1048 | if (rc) | |
1049 | return rc; | |
1050 | ||
3e8a72d1 FF |
1051 | dev_add_pack(&dsa_pack_type); |
1052 | ||
7df899c3 | 1053 | return 0; |
91da11f8 LB |
1054 | } |
1055 | module_init(dsa_init_module); | |
1056 | ||
1057 | static void __exit dsa_cleanup_module(void) | |
1058 | { | |
b73adef6 | 1059 | unregister_netdevice_notifier(&dsa_netdevice_nb); |
3e8a72d1 | 1060 | dev_remove_pack(&dsa_pack_type); |
91da11f8 LB |
1061 | platform_driver_unregister(&dsa_driver); |
1062 | } | |
1063 | module_exit(dsa_cleanup_module); | |
1064 | ||
577d6a7c | 1065 | MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>"); |
91da11f8 LB |
1066 | MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips"); |
1067 | MODULE_LICENSE("GPL"); | |
1068 | MODULE_ALIAS("platform:dsa"); |