main.c revision 21e0534ad7415559bb8dee0dc00e39646fed83c9 
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/bcma/bcma.h>
10#include <linux/slab.h>
11
12MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
13MODULE_LICENSE("GPL");
14
15static int bcma_bus_match(struct device *dev, struct device_driver *drv);
16static int bcma_device_probe(struct device *dev);
17static int bcma_device_remove(struct device *dev);
18
19static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
20{
21	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
22	return sprintf(buf, "0x%03X\n", core->id.manuf);
23}
24static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
25{
26	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
27	return sprintf(buf, "0x%03X\n", core->id.id);
28}
29static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
30{
31	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
32	return sprintf(buf, "0x%02X\n", core->id.rev);
33}
34static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
35{
36	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
37	return sprintf(buf, "0x%X\n", core->id.class);
38}
39static struct device_attribute bcma_device_attrs[] = {
40	__ATTR_RO(manuf),
41	__ATTR_RO(id),
42	__ATTR_RO(rev),
43	__ATTR_RO(class),
44	__ATTR_NULL,
45};
46
47static struct bus_type bcma_bus_type = {
48	.name		= "bcma",
49	.match		= bcma_bus_match,
50	.probe		= bcma_device_probe,
51	.remove		= bcma_device_remove,
52	.dev_attrs	= bcma_device_attrs,
53};
54
55static struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
56{
57	struct bcma_device *core;
58
59	list_for_each_entry(core, &bus->cores, list) {
60		if (core->id.id == coreid)
61			return core;
62	}
63	return NULL;
64}
65
66static void bcma_release_core_dev(struct device *dev)
67{
68	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
69	if (core->io_addr)
70		iounmap(core->io_addr);
71	if (core->io_wrap)
72		iounmap(core->io_wrap);
73	kfree(core);
74}
75
76static int bcma_register_cores(struct bcma_bus *bus)
77{
78	struct bcma_device *core;
79	int err, dev_id = 0;
80
81	list_for_each_entry(core, &bus->cores, list) {
82		/* We support that cores ourself */
83		switch (core->id.id) {
84		case BCMA_CORE_CHIPCOMMON:
85		case BCMA_CORE_PCI:
86		case BCMA_CORE_PCIE:
87		case BCMA_CORE_MIPS_74K:
88			continue;
89		}
90
91		core->dev.release = bcma_release_core_dev;
92		core->dev.bus = &bcma_bus_type;
93		dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id);
94
95		switch (bus->hosttype) {
96		case BCMA_HOSTTYPE_PCI:
97			core->dev.parent = &bus->host_pci->dev;
98			core->dma_dev = &bus->host_pci->dev;
99			core->irq = bus->host_pci->irq;
100			break;
101		case BCMA_HOSTTYPE_SOC:
102			core->dev.dma_mask = &core->dev.coherent_dma_mask;
103			core->dma_dev = &core->dev;
104			break;
105		case BCMA_HOSTTYPE_SDIO:
106			break;
107		}
108
109		err = device_register(&core->dev);
110		if (err) {
111			pr_err("Could not register dev for core 0x%03X\n",
112			       core->id.id);
113			continue;
114		}
115		core->dev_registered = true;
116		dev_id++;
117	}
118
119	return 0;
120}
121
122static void bcma_unregister_cores(struct bcma_bus *bus)
123{
124	struct bcma_device *core;
125
126	list_for_each_entry(core, &bus->cores, list) {
127		if (core->dev_registered)
128			device_unregister(&core->dev);
129	}
130}
131
132int bcma_bus_register(struct bcma_bus *bus)
133{
134	int err;
135	struct bcma_device *core;
136
137	/* Scan for devices (cores) */
138	err = bcma_bus_scan(bus);
139	if (err) {
140		pr_err("Failed to scan: %d\n", err);
141		return -1;
142	}
143
144	/* Init CC core */
145	core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
146	if (core) {
147		bus->drv_cc.core = core;
148		bcma_core_chipcommon_init(&bus->drv_cc);
149	}
150
151	/* Init MIPS core */
152	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
153	if (core) {
154		bus->drv_mips.core = core;
155		bcma_core_mips_init(&bus->drv_mips);
156	}
157
158	/* Init PCIE core */
159	core = bcma_find_core(bus, BCMA_CORE_PCIE);
160	if (core) {
161		bus->drv_pci.core = core;
162		bcma_core_pci_init(&bus->drv_pci);
163	}
164
165	/* Try to get SPROM */
166	err = bcma_sprom_get(bus);
167	if (err == -ENOENT) {
168		pr_err("No SPROM available\n");
169	} else if (err) {
170		pr_err("Failed to get SPROM: %d\n", err);
171		return -ENOENT;
172	}
173
174	/* Register found cores */
175	bcma_register_cores(bus);
176
177	pr_info("Bus registered\n");
178
179	return 0;
180}
181
182void bcma_bus_unregister(struct bcma_bus *bus)
183{
184	bcma_unregister_cores(bus);
185}
186
187int __init bcma_bus_early_register(struct bcma_bus *bus,
188				   struct bcma_device *core_cc,
189				   struct bcma_device *core_mips)
190{
191	int err;
192	struct bcma_device *core;
193	struct bcma_device_id match;
194
195	bcma_init_bus(bus);
196
197	match.manuf = BCMA_MANUF_BCM;
198	match.id = BCMA_CORE_CHIPCOMMON;
199	match.class = BCMA_CL_SIM;
200	match.rev = BCMA_ANY_REV;
201
202	/* Scan for chip common core */
203	err = bcma_bus_scan_early(bus, &match, core_cc);
204	if (err) {
205		pr_err("Failed to scan for common core: %d\n", err);
206		return -1;
207	}
208
209	match.manuf = BCMA_MANUF_MIPS;
210	match.id = BCMA_CORE_MIPS_74K;
211	match.class = BCMA_CL_SIM;
212	match.rev = BCMA_ANY_REV;
213
214	/* Scan for mips core */
215	err = bcma_bus_scan_early(bus, &match, core_mips);
216	if (err) {
217		pr_err("Failed to scan for mips core: %d\n", err);
218		return -1;
219	}
220
221	/* Init CC core */
222	core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
223	if (core) {
224		bus->drv_cc.core = core;
225		bcma_core_chipcommon_init(&bus->drv_cc);
226	}
227
228	/* Init MIPS core */
229	core = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
230	if (core) {
231		bus->drv_mips.core = core;
232		bcma_core_mips_init(&bus->drv_mips);
233	}
234
235	pr_info("Early bus registered\n");
236
237	return 0;
238}
239
240int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
241{
242	drv->drv.name = drv->name;
243	drv->drv.bus = &bcma_bus_type;
244	drv->drv.owner = owner;
245
246	return driver_register(&drv->drv);
247}
248EXPORT_SYMBOL_GPL(__bcma_driver_register);
249
250void bcma_driver_unregister(struct bcma_driver *drv)
251{
252	driver_unregister(&drv->drv);
253}
254EXPORT_SYMBOL_GPL(bcma_driver_unregister);
255
256static int bcma_bus_match(struct device *dev, struct device_driver *drv)
257{
258	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
259	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
260	const struct bcma_device_id *cid = &core->id;
261	const struct bcma_device_id *did;
262
263	for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
264	    if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
265		(did->id == cid->id || did->id == BCMA_ANY_ID) &&
266		(did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
267		(did->class == cid->class || did->class == BCMA_ANY_CLASS))
268			return 1;
269	}
270	return 0;
271}
272
273static int bcma_device_probe(struct device *dev)
274{
275	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
276	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
277					       drv);
278	int err = 0;
279
280	if (adrv->probe)
281		err = adrv->probe(core);
282
283	return err;
284}
285
286static int bcma_device_remove(struct device *dev)
287{
288	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
289	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
290					       drv);
291
292	if (adrv->remove)
293		adrv->remove(core);
294
295	return 0;
296}
297
298static int __init bcma_modinit(void)
299{
300	int err;
301
302	err = bus_register(&bcma_bus_type);
303	if (err)
304		return err;
305
306#ifdef CONFIG_BCMA_HOST_PCI
307	err = bcma_host_pci_init();
308	if (err) {
309		pr_err("PCI host initialization failed\n");
310		err = 0;
311	}
312#endif
313
314	return err;
315}
316fs_initcall(bcma_modinit);
317
318static void __exit bcma_modexit(void)
319{
320#ifdef CONFIG_BCMA_HOST_PCI
321	bcma_host_pci_exit();
322#endif
323	bus_unregister(&bcma_bus_type);
324}
325module_exit(bcma_modexit)
326