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
11MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
12MODULE_LICENSE("GPL");
13
14static int bcma_bus_match(struct device *dev, struct device_driver *drv);
15static int bcma_device_probe(struct device *dev);
16static int bcma_device_remove(struct device *dev);
17
18static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
19{
20 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
21 return sprintf(buf, "0x%03X\n", core->id.manuf);
22}
23static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
24{
25 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
26 return sprintf(buf, "0x%03X\n", core->id.id);
27}
28static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
29{
30 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
31 return sprintf(buf, "0x%02X\n", core->id.rev);
32}
33static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
34{
35 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
36 return sprintf(buf, "0x%X\n", core->id.class);
37}
38static struct device_attribute bcma_device_attrs[] = {
39 __ATTR_RO(manuf),
40 __ATTR_RO(id),
41 __ATTR_RO(rev),
42 __ATTR_RO(class),
43 __ATTR_NULL,
44};
45
46static struct bus_type bcma_bus_type = {
47 .name = "bcma",
48 .match = bcma_bus_match,
49 .probe = bcma_device_probe,
50 .remove = bcma_device_remove,
51 .dev_attrs = bcma_device_attrs,
52};
53
54static struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
55{
56 struct bcma_device *core;
57
58 list_for_each_entry(core, &bus->cores, list) {
59 if (core->id.id == coreid)
60 return core;
61 }
62 return NULL;
63}
64
65static void bcma_release_core_dev(struct device *dev)
66{
67 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
68 kfree(core);
69}
70
71static int bcma_register_cores(struct bcma_bus *bus)
72{
73 struct bcma_device *core;
74 int err, dev_id = 0;
75
76 list_for_each_entry(core, &bus->cores, list) {
77 /* We support that cores ourself */
78 switch (core->id.id) {
79 case BCMA_CORE_CHIPCOMMON:
80 case BCMA_CORE_PCI:
81 case BCMA_CORE_PCIE:
82 continue;
83 }
84
85 core->dev.release = bcma_release_core_dev;
86 core->dev.bus = &bcma_bus_type;
87 dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id);
88
89 switch (bus->hosttype) {
90 case BCMA_HOSTTYPE_PCI:
91 core->dev.parent = &bus->host_pci->dev;
92 break;
93 case BCMA_HOSTTYPE_NONE:
94 case BCMA_HOSTTYPE_SDIO:
95 break;
96 }
97
98 err = device_register(&core->dev);
99 if (err) {
100 pr_err("Could not register dev for core 0x%03X\n",
101 core->id.id);
102 continue;
103 }
104 core->dev_registered = true;
105 dev_id++;
106 }
107
108 return 0;
109}
110
111static void bcma_unregister_cores(struct bcma_bus *bus)
112{
113 struct bcma_device *core;
114
115 list_for_each_entry(core, &bus->cores, list) {
116 if (core->dev_registered)
117 device_unregister(&core->dev);
118 }
119}
120
121int bcma_bus_register(struct bcma_bus *bus)
122{
123 int err;
124 struct bcma_device *core;
125
126 /* Scan for devices (cores) */
127 err = bcma_bus_scan(bus);
128 if (err) {
129 pr_err("Failed to scan: %d\n", err);
130 return -1;
131 }
132
133 /* Init CC core */
134 core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
135 if (core) {
136 bus->drv_cc.core = core;
137 bcma_core_chipcommon_init(&bus->drv_cc);
138 }
139
140 /* Init PCIE core */
141 core = bcma_find_core(bus, BCMA_CORE_PCIE);
142 if (core) {
143 bus->drv_pci.core = core;
144 bcma_core_pci_init(&bus->drv_pci);
145 }
146
147 /* Register found cores */
148 bcma_register_cores(bus);
149
150 pr_info("Bus registered\n");
151
152 return 0;
153}
154EXPORT_SYMBOL_GPL(bcma_bus_register);
155
156void bcma_bus_unregister(struct bcma_bus *bus)
157{
158 bcma_unregister_cores(bus);
159}
160EXPORT_SYMBOL_GPL(bcma_bus_unregister);
161
162int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
163{
164 drv->drv.name = drv->name;
165 drv->drv.bus = &bcma_bus_type;
166 drv->drv.owner = owner;
167
168 return driver_register(&drv->drv);
169}
170EXPORT_SYMBOL_GPL(__bcma_driver_register);
171
172void bcma_driver_unregister(struct bcma_driver *drv)
173{
174 driver_unregister(&drv->drv);
175}
176EXPORT_SYMBOL_GPL(bcma_driver_unregister);
177
178static int bcma_bus_match(struct device *dev, struct device_driver *drv)
179{
180 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
181 struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
182 const struct bcma_device_id *cid = &core->id;
183 const struct bcma_device_id *did;
184
185 for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
186 if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
187 (did->id == cid->id || did->id == BCMA_ANY_ID) &&
188 (did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
189 (did->class == cid->class || did->class == BCMA_ANY_CLASS))
190 return 1;
191 }
192 return 0;
193}
194
195static int bcma_device_probe(struct device *dev)
196{
197 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
198 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
199 drv);
200 int err = 0;
201
202 if (adrv->probe)
203 err = adrv->probe(core);
204
205 return err;
206}
207
208static int bcma_device_remove(struct device *dev)
209{
210 struct bcma_device *core = container_of(dev, struct bcma_device, dev);
211 struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
212 drv);
213
214 if (adrv->remove)
215 adrv->remove(core);
216
217 return 0;
218}
219
220static int __init bcma_modinit(void)
221{
222 int err;
223
224 err = bus_register(&bcma_bus_type);
225 if (err)
226 return err;
227
228#ifdef CONFIG_BCMA_HOST_PCI
229 err = bcma_host_pci_init();
230 if (err) {
231 pr_err("PCI host initialization failed\n");
232 err = 0;
233 }
234#endif
235
236 return err;
237}
238fs_initcall(bcma_modinit);
239
240static void __exit bcma_modexit(void)
241{
242#ifdef CONFIG_BCMA_HOST_PCI
243 bcma_host_pci_exit();
244#endif
245 bus_unregister(&bcma_bus_type);
246}
247module_exit(bcma_modexit)