| 1 | /* |
| 2 | * Greybus operations |
| 3 | * |
| 4 | * Copyright 2015-2016 Google Inc. |
| 5 | * |
| 6 | * Released under the GPLv2 only. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/slab.h> |
| 10 | |
| 11 | #include "audio_manager.h" |
| 12 | #include "audio_manager_private.h" |
| 13 | |
| 14 | #define to_gb_audio_module_attr(x) \ |
| 15 | container_of(x, struct gb_audio_manager_module_attribute, attr) |
| 16 | #define to_gb_audio_module(x) \ |
| 17 | container_of(x, struct gb_audio_manager_module, kobj) |
| 18 | |
| 19 | struct gb_audio_manager_module_attribute { |
| 20 | struct attribute attr; |
| 21 | ssize_t (*show)(struct gb_audio_manager_module *module, |
| 22 | struct gb_audio_manager_module_attribute *attr, |
| 23 | char *buf); |
| 24 | ssize_t (*store)(struct gb_audio_manager_module *module, |
| 25 | struct gb_audio_manager_module_attribute *attr, |
| 26 | const char *buf, size_t count); |
| 27 | }; |
| 28 | |
| 29 | static ssize_t gb_audio_module_attr_show( |
| 30 | struct kobject *kobj, struct attribute *attr, char *buf) |
| 31 | { |
| 32 | struct gb_audio_manager_module_attribute *attribute; |
| 33 | struct gb_audio_manager_module *module; |
| 34 | |
| 35 | attribute = to_gb_audio_module_attr(attr); |
| 36 | module = to_gb_audio_module(kobj); |
| 37 | |
| 38 | if (!attribute->show) |
| 39 | return -EIO; |
| 40 | |
| 41 | return attribute->show(module, attribute, buf); |
| 42 | } |
| 43 | |
| 44 | static ssize_t gb_audio_module_attr_store(struct kobject *kobj, |
| 45 | struct attribute *attr, |
| 46 | const char *buf, size_t len) |
| 47 | { |
| 48 | struct gb_audio_manager_module_attribute *attribute; |
| 49 | struct gb_audio_manager_module *module; |
| 50 | |
| 51 | attribute = to_gb_audio_module_attr(attr); |
| 52 | module = to_gb_audio_module(kobj); |
| 53 | |
| 54 | if (!attribute->store) |
| 55 | return -EIO; |
| 56 | |
| 57 | return attribute->store(module, attribute, buf, len); |
| 58 | } |
| 59 | |
| 60 | static const struct sysfs_ops gb_audio_module_sysfs_ops = { |
| 61 | .show = gb_audio_module_attr_show, |
| 62 | .store = gb_audio_module_attr_store, |
| 63 | }; |
| 64 | |
| 65 | static void gb_audio_module_release(struct kobject *kobj) |
| 66 | { |
| 67 | struct gb_audio_manager_module *module = to_gb_audio_module(kobj); |
| 68 | |
| 69 | pr_info("Destroying audio module #%d\n", module->id); |
| 70 | /* TODO -> delete from list */ |
| 71 | kfree(module); |
| 72 | } |
| 73 | |
| 74 | static ssize_t gb_audio_module_name_show( |
| 75 | struct gb_audio_manager_module *module, |
| 76 | struct gb_audio_manager_module_attribute *attr, char *buf) |
| 77 | { |
| 78 | return sprintf(buf, "%s", module->desc.name); |
| 79 | } |
| 80 | |
| 81 | static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute = |
| 82 | __ATTR(name, 0664, gb_audio_module_name_show, NULL); |
| 83 | |
| 84 | static ssize_t gb_audio_module_vid_show( |
| 85 | struct gb_audio_manager_module *module, |
| 86 | struct gb_audio_manager_module_attribute *attr, char *buf) |
| 87 | { |
| 88 | return sprintf(buf, "%d", module->desc.vid); |
| 89 | } |
| 90 | |
| 91 | static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute = |
| 92 | __ATTR(vid, 0664, gb_audio_module_vid_show, NULL); |
| 93 | |
| 94 | static ssize_t gb_audio_module_pid_show( |
| 95 | struct gb_audio_manager_module *module, |
| 96 | struct gb_audio_manager_module_attribute *attr, char *buf) |
| 97 | { |
| 98 | return sprintf(buf, "%d", module->desc.pid); |
| 99 | } |
| 100 | |
| 101 | static struct gb_audio_manager_module_attribute gb_audio_module_pid_attribute = |
| 102 | __ATTR(pid, 0664, gb_audio_module_pid_show, NULL); |
| 103 | |
| 104 | static ssize_t gb_audio_module_intf_id_show( |
| 105 | struct gb_audio_manager_module *module, |
| 106 | struct gb_audio_manager_module_attribute *attr, char *buf) |
| 107 | { |
| 108 | return sprintf(buf, "%d", module->desc.intf_id); |
| 109 | } |
| 110 | |
| 111 | static struct gb_audio_manager_module_attribute |
| 112 | gb_audio_module_intf_id_attribute = |
| 113 | __ATTR(intf_id, 0664, gb_audio_module_intf_id_show, NULL); |
| 114 | |
| 115 | static ssize_t gb_audio_module_ip_devices_show( |
| 116 | struct gb_audio_manager_module *module, |
| 117 | struct gb_audio_manager_module_attribute *attr, char *buf) |
| 118 | { |
| 119 | return sprintf(buf, "0x%X", module->desc.ip_devices); |
| 120 | } |
| 121 | |
| 122 | static struct gb_audio_manager_module_attribute |
| 123 | gb_audio_module_ip_devices_attribute = |
| 124 | __ATTR(ip_devices, 0664, gb_audio_module_ip_devices_show, NULL); |
| 125 | |
| 126 | static ssize_t gb_audio_module_op_devices_show( |
| 127 | struct gb_audio_manager_module *module, |
| 128 | struct gb_audio_manager_module_attribute *attr, char *buf) |
| 129 | { |
| 130 | return sprintf(buf, "0x%X", module->desc.op_devices); |
| 131 | } |
| 132 | |
| 133 | static struct gb_audio_manager_module_attribute |
| 134 | gb_audio_module_op_devices_attribute = |
| 135 | __ATTR(op_devices, 0664, gb_audio_module_op_devices_show, NULL); |
| 136 | |
| 137 | static struct attribute *gb_audio_module_default_attrs[] = { |
| 138 | &gb_audio_module_name_attribute.attr, |
| 139 | &gb_audio_module_vid_attribute.attr, |
| 140 | &gb_audio_module_pid_attribute.attr, |
| 141 | &gb_audio_module_intf_id_attribute.attr, |
| 142 | &gb_audio_module_ip_devices_attribute.attr, |
| 143 | &gb_audio_module_op_devices_attribute.attr, |
| 144 | NULL, /* need to NULL terminate the list of attributes */ |
| 145 | }; |
| 146 | |
| 147 | static struct kobj_type gb_audio_module_type = { |
| 148 | .sysfs_ops = &gb_audio_module_sysfs_ops, |
| 149 | .release = gb_audio_module_release, |
| 150 | .default_attrs = gb_audio_module_default_attrs, |
| 151 | }; |
| 152 | |
| 153 | static void send_add_uevent(struct gb_audio_manager_module *module) |
| 154 | { |
| 155 | char name_string[128]; |
| 156 | char vid_string[64]; |
| 157 | char pid_string[64]; |
| 158 | char intf_id_string[64]; |
| 159 | char ip_devices_string[64]; |
| 160 | char op_devices_string[64]; |
| 161 | |
| 162 | char *envp[] = { |
| 163 | name_string, |
| 164 | vid_string, |
| 165 | pid_string, |
| 166 | intf_id_string, |
| 167 | ip_devices_string, |
| 168 | op_devices_string, |
| 169 | NULL |
| 170 | }; |
| 171 | |
| 172 | snprintf(name_string, 128, "NAME=%s", module->desc.name); |
| 173 | snprintf(vid_string, 64, "VID=%d", module->desc.vid); |
| 174 | snprintf(pid_string, 64, "PID=%d", module->desc.pid); |
| 175 | snprintf(intf_id_string, 64, "INTF_ID=%d", module->desc.intf_id); |
| 176 | snprintf(ip_devices_string, 64, "I/P DEVICES=0x%X", |
| 177 | module->desc.ip_devices); |
| 178 | snprintf(op_devices_string, 64, "O/P DEVICES=0x%X", |
| 179 | module->desc.op_devices); |
| 180 | |
| 181 | kobject_uevent_env(&module->kobj, KOBJ_ADD, envp); |
| 182 | } |
| 183 | |
| 184 | int gb_audio_manager_module_create( |
| 185 | struct gb_audio_manager_module **module, |
| 186 | struct kset *manager_kset, |
| 187 | int id, struct gb_audio_manager_module_descriptor *desc) |
| 188 | { |
| 189 | int err; |
| 190 | struct gb_audio_manager_module *m; |
| 191 | |
| 192 | m = kzalloc(sizeof(*m), GFP_ATOMIC); |
| 193 | if (!m) |
| 194 | return -ENOMEM; |
| 195 | |
| 196 | /* Initialize the node */ |
| 197 | INIT_LIST_HEAD(&m->list); |
| 198 | |
| 199 | /* Set the module id */ |
| 200 | m->id = id; |
| 201 | |
| 202 | /* Copy the provided descriptor */ |
| 203 | memcpy(&m->desc, desc, sizeof(*desc)); |
| 204 | |
| 205 | /* set the kset */ |
| 206 | m->kobj.kset = manager_kset; |
| 207 | |
| 208 | /* |
| 209 | * Initialize and add the kobject to the kernel. All the default files |
| 210 | * will be created here. As we have already specified a kset for this |
| 211 | * kobject, we don't have to set a parent for the kobject, the kobject |
| 212 | * will be placed beneath that kset automatically. |
| 213 | */ |
| 214 | err = kobject_init_and_add(&m->kobj, &gb_audio_module_type, NULL, "%d", |
| 215 | id); |
| 216 | if (err) { |
| 217 | pr_err("failed initializing kobject for audio module #%d\n", |
| 218 | id); |
| 219 | kobject_put(&m->kobj); |
| 220 | return err; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Notify the object was created |
| 225 | */ |
| 226 | send_add_uevent(m); |
| 227 | |
| 228 | *module = m; |
| 229 | pr_info("Created audio module #%d\n", id); |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | void gb_audio_manager_module_dump(struct gb_audio_manager_module *module) |
| 234 | { |
| 235 | pr_info("audio module #%d name=%s vid=%d pid=%d intf_id=%d i/p devices=0x%X o/p devices=0x%X\n", |
| 236 | module->id, |
| 237 | module->desc.name, |
| 238 | module->desc.vid, |
| 239 | module->desc.pid, |
| 240 | module->desc.intf_id, |
| 241 | module->desc.ip_devices, |
| 242 | module->desc.op_devices); |
| 243 | } |