Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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);
18static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
19
20static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
21{
22 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
23 return sprintf(buf, "0x%03X\n", core->id.manuf);
24}
25static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
26{
27 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
28 return sprintf(buf, "0x%03X\n", core->id.id);
29}
30static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
31{
32 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
33 return sprintf(buf, "0x%02X\n", core->id.rev);
34}
35static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
36{
37 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
38 return sprintf(buf, "0x%X\n", core->id.class);
39}
40static struct device_attribute bcma_device_attrs[] = {
41 __ATTR_RO(manuf),
42 __ATTR_RO(id),
43 __ATTR_RO(rev),
44 __ATTR_RO(class),
45 __ATTR_NULL,
46};
47
48static struct bus_type bcma_bus_type = {
49 .name = "bcma",
50 .match = bcma_bus_match,
51 .probe = bcma_device_probe,
52 .remove = bcma_device_remove,
53 .uevent = bcma_device_uevent,
54 .dev_attrs = bcma_device_attrs,
55};
56
57static struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
58{
59 struct bcma_device *core;
60
61 list_for_each_entry(core, &bus->cores, list) {
62 if (core->id.id == coreid)
63 return core;
64 }
65 return NULL;
66}
67
68static void bcma_release_core_dev(struct device *dev)
69{
70 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
71 kfree(core);
72}
73
74static int bcma_register_cores(struct bcma_bus *bus)
75{
76 struct bcma_device *core;
77 int err, dev_id = 0;
78
79 list_for_each_entry(core, &bus->cores, list) {
80 /* We support that cores ourself */
81 switch (core->id.id) {
82 case BCMA_CORE_CHIPCOMMON:
83 case BCMA_CORE_PCI:
84 case BCMA_CORE_PCIE:
85 continue;
86 }
87
88 core->dev.release = bcma_release_core_dev;
89 core->dev.bus = &bcma_bus_type;
90 dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id);
91
92 switch (bus->hosttype) {
93 case BCMA_HOSTTYPE_PCI:
94 core->dev.parent = &bus->host_pci->dev;
95 core->dma_dev = &bus->host_pci->dev;
96 core->irq = bus->host_pci->irq;
97 break;
98 case BCMA_HOSTTYPE_NONE:
99 case BCMA_HOSTTYPE_SDIO:
100 break;
101 }
102
103 err = device_register(&core->dev);
104 if (err) {
105 pr_err("Could not register dev for core 0x%03X\n",
106 core->id.id);
107 continue;
108 }
109 core->dev_registered = true;
110 dev_id++;
111 }
112
113 return 0;
114}
115
116static void bcma_unregister_cores(struct bcma_bus *bus)
117{
118 struct bcma_device *core;
119
120 list_for_each_entry(core, &bus->cores, list) {
121 if (core->dev_registered)
122 device_unregister(&core->dev);
123 }
124}
125
126int bcma_bus_register(struct bcma_bus *bus)
127{
128 int err;
129 struct bcma_device *core;
130
131 /* Scan for devices (cores) */
132 err = bcma_bus_scan(bus);
133 if (err) {
134 pr_err("Failed to scan: %d\n", err);
135 return -1;
136 }
137
138 /* Init CC core */
139 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
140 if (core) {
141 bus->drv_cc.core = core;
142 bcma_core_chipcommon_init(&bus->drv_cc);
143 }
144
145 /* Init PCIE core */
146 core = bcma_find_core(bus, BCMA_CORE_PCIE);
147 if (core) {
148 bus->drv_pci.core = core;
149 bcma_core_pci_init(&bus->drv_pci);
150 }
151
152 /* Try to get SPROM */
153 err = bcma_sprom_get(bus);
154 if (err == -ENOENT) {
155 pr_err("No SPROM available\n");
156 } else if (err) {
157 pr_err("Failed to get SPROM: %d\n", err);
158 return -ENOENT;
159 }
160
161 /* Register found cores */
162 bcma_register_cores(bus);
163
164 pr_info("Bus registered\n");
165
166 return 0;
167}
168
169void bcma_bus_unregister(struct bcma_bus *bus)
170{
171 bcma_unregister_cores(bus);
172}
173
174int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
175{
176 drv->drv.name = drv->name;
177 drv->drv.bus = &bcma_bus_type;
178 drv->drv.owner = owner;
179
180 return driver_register(&drv->drv);
181}
182EXPORT_SYMBOL_GPL(__bcma_driver_register);
183
184void bcma_driver_unregister(struct bcma_driver *drv)
185{
186 driver_unregister(&drv->drv);
187}
188EXPORT_SYMBOL_GPL(bcma_driver_unregister);
189
190static int bcma_bus_match(struct device *dev, struct device_driver *drv)
191{
192 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
193 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
194 const struct bcma_device_id *cid = &core->id;
195 const struct bcma_device_id *did;
196
197 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
198 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
199 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
200 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
201 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
202 return 1;
203 }
204 return 0;
205}
206
207static int bcma_device_probe(struct device *dev)
208{
209 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
210 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
211 drv);
212 int err = 0;
213
214 if (adrv->probe)
215 err = adrv->probe(core);
216
217 return err;
218}
219
220static int bcma_device_remove(struct device *dev)
221{
222 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
223 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
224 drv);
225
226 if (adrv->remove)
227 adrv->remove(core);
228
229 return 0;
230}
231
232static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
233{
234 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
235
236 return add_uevent_var(env,
237 "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",
238 core->id.manuf, core->id.id,
239 core->id.rev, core->id.class);
240}
241
242static int __init bcma_modinit(void)
243{
244 int err;
245
246 err = bus_register(&bcma_bus_type);
247 if (err)
248 return err;
249
250#ifdef CONFIG_BCMA_HOST_PCI
251 err = bcma_host_pci_init();
252 if (err) {
253 pr_err("PCI host initialization failed\n");
254 err = 0;
255 }
256#endif
257
258 return err;
259}
260fs_initcall(bcma_modinit);
261
262static void __exit bcma_modexit(void)
263{
264#ifdef CONFIG_BCMA_HOST_PCI
265 bcma_host_pci_exit();
266#endif
267 bus_unregister(&bcma_bus_type);
268}
269module_exit(bcma_modexit)