1 /*
2 * Broadcom specific AMBA
3 * Bus subsystem
4 *
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
7
8 #include "bcma_private.h"
9 #include <linux/module.h>
10 #include <linux/bcma/bcma.h>
11 #include <linux/slab.h>
12
13 MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
14 MODULE_LICENSE("GPL");
15
16 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
17 static int bcma_device_probe(struct device *dev);
18 static int bcma_device_remove(struct device *dev);
19 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
20
manuf_show(struct device * dev,struct device_attribute * attr,char * buf)21 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
22 {
23 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
24 return sprintf(buf, "0x%03X\n", core->id.manuf);
25 }
id_show(struct device * dev,struct device_attribute * attr,char * buf)26 static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
27 {
28 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
29 return sprintf(buf, "0x%03X\n", core->id.id);
30 }
rev_show(struct device * dev,struct device_attribute * attr,char * buf)31 static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
32 {
33 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
34 return sprintf(buf, "0x%02X\n", core->id.rev);
35 }
class_show(struct device * dev,struct device_attribute * attr,char * buf)36 static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
37 {
38 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
39 return sprintf(buf, "0x%X\n", core->id.class);
40 }
41 static struct device_attribute bcma_device_attrs[] = {
42 __ATTR_RO(manuf),
43 __ATTR_RO(id),
44 __ATTR_RO(rev),
45 __ATTR_RO(class),
46 __ATTR_NULL,
47 };
48
49 static struct bus_type bcma_bus_type = {
50 .name = "bcma",
51 .match = bcma_bus_match,
52 .probe = bcma_device_probe,
53 .remove = bcma_device_remove,
54 .uevent = bcma_device_uevent,
55 .dev_attrs = bcma_device_attrs,
56 };
57
bcma_find_core(struct bcma_bus * bus,u16 coreid)58 static struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
59 {
60 struct bcma_device *core;
61
62 list_for_each_entry(core, &bus->cores, list) {
63 if (core->id.id == coreid)
64 return core;
65 }
66 return NULL;
67 }
68
bcma_release_core_dev(struct device * dev)69 static void bcma_release_core_dev(struct device *dev)
70 {
71 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
72 if (core->io_addr)
73 iounmap(core->io_addr);
74 if (core->io_wrap)
75 iounmap(core->io_wrap);
76 kfree(core);
77 }
78
bcma_register_cores(struct bcma_bus * bus)79 static int bcma_register_cores(struct bcma_bus *bus)
80 {
81 struct bcma_device *core;
82 int err, dev_id = 0;
83
84 list_for_each_entry(core, &bus->cores, list) {
85 /* We support that cores ourself */
86 switch (core->id.id) {
87 case BCMA_CORE_CHIPCOMMON:
88 case BCMA_CORE_PCI:
89 case BCMA_CORE_PCIE:
90 case BCMA_CORE_MIPS_74K:
91 continue;
92 }
93
94 core->dev.release = bcma_release_core_dev;
95 core->dev.bus = &bcma_bus_type;
96 dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id);
97
98 switch (bus->hosttype) {
99 case BCMA_HOSTTYPE_PCI:
100 core->dev.parent = &bus->host_pci->dev;
101 core->dma_dev = &bus->host_pci->dev;
102 core->irq = bus->host_pci->irq;
103 break;
104 case BCMA_HOSTTYPE_SOC:
105 core->dev.dma_mask = &core->dev.coherent_dma_mask;
106 core->dma_dev = &core->dev;
107 break;
108 case BCMA_HOSTTYPE_SDIO:
109 break;
110 }
111
112 err = device_register(&core->dev);
113 if (err) {
114 pr_err("Could not register dev for core 0x%03X\n",
115 core->id.id);
116 continue;
117 }
118 core->dev_registered = true;
119 dev_id++;
120 }
121
122 return 0;
123 }
124
bcma_unregister_cores(struct bcma_bus * bus)125 static void bcma_unregister_cores(struct bcma_bus *bus)
126 {
127 struct bcma_device *core;
128
129 list_for_each_entry(core, &bus->cores, list) {
130 if (core->dev_registered)
131 device_unregister(&core->dev);
132 }
133 }
134
bcma_bus_register(struct bcma_bus * bus)135 int bcma_bus_register(struct bcma_bus *bus)
136 {
137 int err;
138 struct bcma_device *core;
139
140 /* Scan for devices (cores) */
141 err = bcma_bus_scan(bus);
142 if (err) {
143 pr_err("Failed to scan: %d\n", err);
144 return -1;
145 }
146
147 /* Init CC core */
148 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
149 if (core) {
150 bus->drv_cc.core = core;
151 bcma_core_chipcommon_init(&bus->drv_cc);
152 }
153
154 /* Init MIPS core */
155 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
156 if (core) {
157 bus->drv_mips.core = core;
158 bcma_core_mips_init(&bus->drv_mips);
159 }
160
161 /* Init PCIE core */
162 core = bcma_find_core(bus, BCMA_CORE_PCIE);
163 if (core) {
164 bus->drv_pci.core = core;
165 bcma_core_pci_init(&bus->drv_pci);
166 }
167
168 /* Try to get SPROM */
169 err = bcma_sprom_get(bus);
170 if (err == -ENOENT) {
171 pr_err("No SPROM available\n");
172 } else if (err)
173 pr_err("Failed to get SPROM: %d\n", err);
174
175 /* Register found cores */
176 bcma_register_cores(bus);
177
178 pr_info("Bus registered\n");
179
180 return 0;
181 }
182
bcma_bus_unregister(struct bcma_bus * bus)183 void bcma_bus_unregister(struct bcma_bus *bus)
184 {
185 bcma_unregister_cores(bus);
186 }
187
bcma_bus_early_register(struct bcma_bus * bus,struct bcma_device * core_cc,struct bcma_device * core_mips)188 int __init bcma_bus_early_register(struct bcma_bus *bus,
189 struct bcma_device *core_cc,
190 struct bcma_device *core_mips)
191 {
192 int err;
193 struct bcma_device *core;
194 struct bcma_device_id match;
195
196 bcma_init_bus(bus);
197
198 match.manuf = BCMA_MANUF_BCM;
199 match.id = BCMA_CORE_CHIPCOMMON;
200 match.class = BCMA_CL_SIM;
201 match.rev = BCMA_ANY_REV;
202
203 /* Scan for chip common core */
204 err = bcma_bus_scan_early(bus, &match, core_cc);
205 if (err) {
206 pr_err("Failed to scan for common core: %d\n", err);
207 return -1;
208 }
209
210 match.manuf = BCMA_MANUF_MIPS;
211 match.id = BCMA_CORE_MIPS_74K;
212 match.class = BCMA_CL_SIM;
213 match.rev = BCMA_ANY_REV;
214
215 /* Scan for mips core */
216 err = bcma_bus_scan_early(bus, &match, core_mips);
217 if (err) {
218 pr_err("Failed to scan for mips core: %d\n", err);
219 return -1;
220 }
221
222 /* Init CC core */
223 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
224 if (core) {
225 bus->drv_cc.core = core;
226 bcma_core_chipcommon_init(&bus->drv_cc);
227 }
228
229 /* Init MIPS core */
230 core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
231 if (core) {
232 bus->drv_mips.core = core;
233 bcma_core_mips_init(&bus->drv_mips);
234 }
235
236 pr_info("Early bus registered\n");
237
238 return 0;
239 }
240
241 #ifdef CONFIG_PM
bcma_bus_suspend(struct bcma_bus * bus)242 int bcma_bus_suspend(struct bcma_bus *bus)
243 {
244 struct bcma_device *core;
245
246 list_for_each_entry(core, &bus->cores, list) {
247 struct device_driver *drv = core->dev.driver;
248 if (drv) {
249 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
250 if (adrv->suspend)
251 adrv->suspend(core);
252 }
253 }
254 return 0;
255 }
256
bcma_bus_resume(struct bcma_bus * bus)257 int bcma_bus_resume(struct bcma_bus *bus)
258 {
259 struct bcma_device *core;
260
261 /* Init CC core */
262 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
263 if (core) {
264 bus->drv_cc.setup_done = false;
265 bcma_core_chipcommon_init(&bus->drv_cc);
266 }
267
268 list_for_each_entry(core, &bus->cores, list) {
269 struct device_driver *drv = core->dev.driver;
270 if (drv) {
271 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
272 if (adrv->resume)
273 adrv->resume(core);
274 }
275 }
276
277 return 0;
278 }
279 #endif
280
__bcma_driver_register(struct bcma_driver * drv,struct module * owner)281 int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
282 {
283 drv->drv.name = drv->name;
284 drv->drv.bus = &bcma_bus_type;
285 drv->drv.owner = owner;
286
287 return driver_register(&drv->drv);
288 }
289 EXPORT_SYMBOL_GPL(__bcma_driver_register);
290
bcma_driver_unregister(struct bcma_driver * drv)291 void bcma_driver_unregister(struct bcma_driver *drv)
292 {
293 driver_unregister(&drv->drv);
294 }
295 EXPORT_SYMBOL_GPL(bcma_driver_unregister);
296
bcma_bus_match(struct device * dev,struct device_driver * drv)297 static int bcma_bus_match(struct device *dev, struct device_driver *drv)
298 {
299 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
300 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
301 const struct bcma_device_id *cid = &core->id;
302 const struct bcma_device_id *did;
303
304 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
305 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
306 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
307 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
308 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
309 return 1;
310 }
311 return 0;
312 }
313
bcma_device_probe(struct device * dev)314 static int bcma_device_probe(struct device *dev)
315 {
316 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
317 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
318 drv);
319 int err = 0;
320
321 if (adrv->probe)
322 err = adrv->probe(core);
323
324 return err;
325 }
326
bcma_device_remove(struct device * dev)327 static int bcma_device_remove(struct device *dev)
328 {
329 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
330 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
331 drv);
332
333 if (adrv->remove)
334 adrv->remove(core);
335
336 return 0;
337 }
338
bcma_device_uevent(struct device * dev,struct kobj_uevent_env * env)339 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
340 {
341 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
342
343 return add_uevent_var(env,
344 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
345 core->id.manuf, core->id.id,
346 core->id.rev, core->id.class);
347 }
348
bcma_modinit(void)349 static int __init bcma_modinit(void)
350 {
351 int err;
352
353 err = bus_register(&bcma_bus_type);
354 if (err)
355 return err;
356
357 #ifdef CONFIG_BCMA_HOST_PCI
358 err = bcma_host_pci_init();
359 if (err) {
360 pr_err("PCI host initialization failed\n");
361 err = 0;
362 }
363 #endif
364
365 return err;
366 }
367 fs_initcall(bcma_modinit);
368
bcma_modexit(void)369 static void __exit bcma_modexit(void)
370 {
371 #ifdef CONFIG_BCMA_HOST_PCI
372 bcma_host_pci_exit();
373 #endif
374 bus_unregister(&bcma_bus_type);
375 }
376 module_exit(bcma_modexit)
377