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10#include "greybus.h"
11#include "greybus_trace.h"
12
13static ssize_t bundle_class_show(struct device *dev,
14 struct device_attribute *attr, char *buf)
15{
16 struct gb_bundle *bundle = to_gb_bundle(dev);
17
18 return sprintf(buf, "0x%02x\n", bundle->class);
19}
20static DEVICE_ATTR_RO(bundle_class);
21
22static ssize_t bundle_id_show(struct device *dev,
23 struct device_attribute *attr, char *buf)
24{
25 struct gb_bundle *bundle = to_gb_bundle(dev);
26
27 return sprintf(buf, "%u\n", bundle->id);
28}
29static DEVICE_ATTR_RO(bundle_id);
30
31static ssize_t state_show(struct device *dev, struct device_attribute *attr,
32 char *buf)
33{
34 struct gb_bundle *bundle = to_gb_bundle(dev);
35
36 if (bundle->state == NULL)
37 return sprintf(buf, "\n");
38
39 return sprintf(buf, "%s\n", bundle->state);
40}
41
42static ssize_t state_store(struct device *dev, struct device_attribute *attr,
43 const char *buf, size_t size)
44{
45 struct gb_bundle *bundle = to_gb_bundle(dev);
46
47 kfree(bundle->state);
48 bundle->state = kstrdup(buf, GFP_KERNEL);
49 if (!bundle->state)
50 return -ENOMEM;
51
52
53 sysfs_notify(&bundle->dev.kobj, NULL, "state");
54
55 return size;
56}
57static DEVICE_ATTR_RW(state);
58
59static struct attribute *bundle_attrs[] = {
60 &dev_attr_bundle_class.attr,
61 &dev_attr_bundle_id.attr,
62 &dev_attr_state.attr,
63 NULL,
64};
65
66ATTRIBUTE_GROUPS(bundle);
67
68static struct gb_bundle *gb_bundle_find(struct gb_interface *intf,
69 u8 bundle_id)
70{
71 struct gb_bundle *bundle;
72
73 list_for_each_entry(bundle, &intf->bundles, links) {
74 if (bundle->id == bundle_id)
75 return bundle;
76 }
77
78 return NULL;
79}
80
81static void gb_bundle_release(struct device *dev)
82{
83 struct gb_bundle *bundle = to_gb_bundle(dev);
84
85 trace_gb_bundle_release(bundle);
86
87 kfree(bundle->state);
88 kfree(bundle->cport_desc);
89 kfree(bundle);
90}
91
92#ifdef CONFIG_PM
93static void gb_bundle_disable_all_connections(struct gb_bundle *bundle)
94{
95 struct gb_connection *connection;
96
97 list_for_each_entry(connection, &bundle->connections, bundle_links)
98 gb_connection_disable(connection);
99}
100
101static void gb_bundle_enable_all_connections(struct gb_bundle *bundle)
102{
103 struct gb_connection *connection;
104
105 list_for_each_entry(connection, &bundle->connections, bundle_links)
106 gb_connection_enable(connection);
107}
108
109static int gb_bundle_suspend(struct device *dev)
110{
111 struct gb_bundle *bundle = to_gb_bundle(dev);
112 const struct dev_pm_ops *pm = dev->driver->pm;
113 int ret;
114
115 if (pm && pm->runtime_suspend) {
116 ret = pm->runtime_suspend(&bundle->dev);
117 if (ret)
118 return ret;
119 } else {
120 gb_bundle_disable_all_connections(bundle);
121 }
122
123 ret = gb_control_bundle_suspend(bundle->intf->control, bundle->id);
124 if (ret) {
125 if (pm && pm->runtime_resume)
126 ret = pm->runtime_resume(dev);
127 else
128 gb_bundle_enable_all_connections(bundle);
129
130 return ret;
131 }
132
133 return 0;
134}
135
136static int gb_bundle_resume(struct device *dev)
137{
138 struct gb_bundle *bundle = to_gb_bundle(dev);
139 const struct dev_pm_ops *pm = dev->driver->pm;
140 int ret;
141
142 ret = gb_control_bundle_resume(bundle->intf->control, bundle->id);
143 if (ret)
144 return ret;
145
146 if (pm && pm->runtime_resume) {
147 ret = pm->runtime_resume(dev);
148 if (ret)
149 return ret;
150 } else {
151 gb_bundle_enable_all_connections(bundle);
152 }
153
154 return 0;
155}
156
157static int gb_bundle_idle(struct device *dev)
158{
159 pm_runtime_mark_last_busy(dev);
160 pm_request_autosuspend(dev);
161
162 return 0;
163}
164#endif
165
166static const struct dev_pm_ops gb_bundle_pm_ops = {
167 SET_RUNTIME_PM_OPS(gb_bundle_suspend, gb_bundle_resume, gb_bundle_idle)
168};
169
170struct device_type greybus_bundle_type = {
171 .name = "greybus_bundle",
172 .release = gb_bundle_release,
173 .pm = &gb_bundle_pm_ops,
174};
175
176
177
178
179
180
181struct gb_bundle *gb_bundle_create(struct gb_interface *intf, u8 bundle_id,
182 u8 class)
183{
184 struct gb_bundle *bundle;
185
186 if (bundle_id == BUNDLE_ID_NONE) {
187 dev_err(&intf->dev, "can't use bundle id %u\n", bundle_id);
188 return NULL;
189 }
190
191
192
193
194
195
196 if (gb_bundle_find(intf, bundle_id)) {
197 dev_err(&intf->dev, "duplicate bundle id %u\n", bundle_id);
198 return NULL;
199 }
200
201 bundle = kzalloc(sizeof(*bundle), GFP_KERNEL);
202 if (!bundle)
203 return NULL;
204
205 bundle->intf = intf;
206 bundle->id = bundle_id;
207 bundle->class = class;
208 INIT_LIST_HEAD(&bundle->connections);
209
210 bundle->dev.parent = &intf->dev;
211 bundle->dev.bus = &greybus_bus_type;
212 bundle->dev.type = &greybus_bundle_type;
213 bundle->dev.groups = bundle_groups;
214 bundle->dev.dma_mask = intf->dev.dma_mask;
215 device_initialize(&bundle->dev);
216 dev_set_name(&bundle->dev, "%s.%d", dev_name(&intf->dev), bundle_id);
217
218 list_add(&bundle->links, &intf->bundles);
219
220 trace_gb_bundle_create(bundle);
221
222 return bundle;
223}
224
225int gb_bundle_add(struct gb_bundle *bundle)
226{
227 int ret;
228
229 ret = device_add(&bundle->dev);
230 if (ret) {
231 dev_err(&bundle->dev, "failed to register bundle: %d\n", ret);
232 return ret;
233 }
234
235 trace_gb_bundle_add(bundle);
236
237 return 0;
238}
239
240
241
242
243void gb_bundle_destroy(struct gb_bundle *bundle)
244{
245 trace_gb_bundle_destroy(bundle);
246
247 if (device_is_registered(&bundle->dev))
248 device_del(&bundle->dev);
249
250 list_del(&bundle->links);
251
252 put_device(&bundle->dev);
253}
254