net/bluetooth/hci_sysfs.c

   1 /* Bluetooth HCI driver model support. */
   2
   3 #include <linux/module.h>
   4
   5 #include <net/bluetooth/bluetooth.h>
   6 #include <net/bluetooth/hci_core.h>
   7
   8 static struct class *bt_class;
   9
  10 static inline char *link_typetostr(int type)
  11 {
  12         switch (type) {
  13         case ACL_LINK:
  14                 return "ACL";
  15         case SCO_LINK:
  16                 return "SCO";
  17         case ESCO_LINK:
  18                 return "eSCO";
  19         case LE_LINK:
  20                 return "LE";
  21         default:
  22                 return "UNKNOWN";
  23         }
  24 }
  25
  26 static ssize_t show_link_type(struct device *dev,
  27                               struct device_attribute *attr, char *buf)
  28 {
  29         struct hci_conn *conn = to_hci_conn(dev);
  30         return sprintf(buf, "%s\n", link_typetostr(conn->type));
  31 }
  32
  33 static ssize_t show_link_address(struct device *dev,
  34                                  struct device_attribute *attr, char *buf)
  35 {
  36         struct hci_conn *conn = to_hci_conn(dev);
  37         return sprintf(buf, "%pMR\n", &conn->dst);
  38 }
  39
  40 #define LINK_ATTR(_name, _mode, _show, _store) \
  41 struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store)
  42
  43 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
  44 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
  45
  46 static struct attribute *bt_link_attrs[] = {
  47         &link_attr_type.attr,
  48         &link_attr_address.attr,
  49         NULL
  50 };
  51
  52 #ifdef CONFIG_TIZEN_WIP
  53 static struct attribute_group bt_link_group = {
  54         .attrs = bt_link_attrs,
  55 };
  56
  57 static const struct attribute_group *bt_link_groups[] = {
  58         &bt_link_group,
  59         NULL
  60 };
  61 #endif
  62 #ifndef CONFIG_TIZEN_WIP
  63 ATTRIBUTE_GROUPS(bt_link);
  64 #endif
  65
  66 static void bt_link_release(struct device *dev)
  67 {
  68         struct hci_conn *conn = to_hci_conn(dev);
  69         kfree(conn);
  70 }
  71
  72 static struct device_type bt_link = {
  73         .name    = "link",
  74         .groups  = bt_link_groups,
  75         .release = bt_link_release,
  76 };
  77
  78 /*
  79  * The rfcomm tty device will possibly retain even when conn
  80  * is down, and sysfs doesn't support move zombie device,
  81  * so we should move the device before conn device is destroyed.
  82  */
  83 static int __match_tty(struct device *dev, void *data)
  84 {
  85         return !strncmp(dev_name(dev), "rfcomm", 6);
  86 }
  87
  88 void hci_conn_init_sysfs(struct hci_conn *conn)
  89 {
  90         struct hci_dev *hdev = conn->hdev;
  91
  92         BT_DBG("conn %p", conn);
  93
  94         conn->dev.type = &bt_link;
  95         conn->dev.class = bt_class;
  96         conn->dev.parent = &hdev->dev;
  97
  98         device_initialize(&conn->dev);
  99 }
 100
 101 void hci_conn_add_sysfs(struct hci_conn *conn)
 102 {
 103         struct hci_dev *hdev = conn->hdev;
 104
 105         BT_DBG("conn %p", conn);
 106
 107         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
 108
 109         if (device_add(&conn->dev) < 0) {
 110                 BT_ERR("Failed to register connection device");
 111                 return;
 112         }
 113
 114         hci_dev_hold(hdev);
 115 }
 116
 117 void hci_conn_del_sysfs(struct hci_conn *conn)
 118 {
 119         struct hci_dev *hdev = conn->hdev;
 120
 121         if (!device_is_registered(&conn->dev))
 122                 return;
 123
 124         while (1) {
 125                 struct device *dev;
 126
 127                 dev = device_find_child(&conn->dev, NULL, __match_tty);
 128                 if (!dev)
 129                         break;
 130                 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
 131                 put_device(dev);
 132         }
 133
 134         device_del(&conn->dev);
 135
 136         hci_dev_put(hdev);
 137 }
 138
 139 static inline char *host_typetostr(int type)
 140 {
 141         switch (type) {
 142         case HCI_BREDR:
 143                 return "BR/EDR";
 144         case HCI_AMP:
 145                 return "AMP";
 146         default:
 147                 return "UNKNOWN";
 148         }
 149 }
 150
 151 static ssize_t show_type(struct device *dev,
 152                          struct device_attribute *attr, char *buf)
 153 {
 154         struct hci_dev *hdev = to_hci_dev(dev);
 155         return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
 156 }
 157
 158 static ssize_t show_name(struct device *dev,
 159                          struct device_attribute *attr, char *buf)
 160 {
 161         struct hci_dev *hdev = to_hci_dev(dev);
 162         char name[HCI_MAX_NAME_LENGTH + 1];
 163         int i;
 164
 165         for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
 166                 name[i] = hdev->dev_name[i];
 167
 168         name[HCI_MAX_NAME_LENGTH] = '\0';
 169         return sprintf(buf, "%s\n", name);
 170 }
 171
 172 static ssize_t show_address(struct device *dev,
 173                             struct device_attribute *attr, char *buf)
 174 {
 175         struct hci_dev *hdev = to_hci_dev(dev);
 176         return sprintf(buf, "%pMR\n", &hdev->bdaddr);
 177 }
 178
 179 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 180 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 181 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
 182
 183 static struct attribute *bt_host_attrs[] = {
 184         &dev_attr_type.attr,
 185         &dev_attr_name.attr,
 186         &dev_attr_address.attr,
 187         NULL
 188 };
 189
 190 #ifdef CONFIG_TIZEN_WIP
 191 static struct attribute_group bt_host_group = {
 192         .attrs = bt_host_attrs,
 193 };
 194
 195 static const struct attribute_group *bt_host_groups[] = {
 196         &bt_host_group,
 197         NULL
 198 };
 199 #endif
 200 #ifndef CONFIG_TIZEN_WIP
 201 ATTRIBUTE_GROUPS(bt_host);
 202 #endif
 203
 204 static void bt_host_release(struct device *dev)
 205 {
 206         struct hci_dev *hdev = to_hci_dev(dev);
 207         kfree(hdev);
 208         module_put(THIS_MODULE);
 209 }
 210
 211 static struct device_type bt_host = {
 212         .name    = "host",
 213         .groups  = bt_host_groups,
 214         .release = bt_host_release,
 215 };
 216
 217 void hci_init_sysfs(struct hci_dev *hdev)
 218 {
 219         struct device *dev = &hdev->dev;
 220
 221         dev->type = &bt_host;
 222         dev->class = bt_class;
 223
 224         __module_get(THIS_MODULE);
 225         device_initialize(dev);
 226 }
 227
 228 int __init bt_sysfs_init(void)
 229 {
 230         bt_class = class_create(THIS_MODULE, "bluetooth");
 231 #ifdef CONFIG_TIZEN_WIP
 232         return PTR_RET(bt_class);
 233 #else
 234         return PTR_ERR_OR_ZERO(bt_class);
 235 #endif
 236
 237 }
 238
 239 void bt_sysfs_cleanup(void)
 240 {
 241         class_destroy(bt_class);
 242 }