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 #else
  62 ATTRIBUTE_GROUPS(bt_link);
  63 #endif
  64
  65 static void bt_link_release(struct device *dev)
  66 {
  67         struct hci_conn *conn = to_hci_conn(dev);
  68         kfree(conn);
  69 }
  70
  71 static struct device_type bt_link = {
  72         .name    = "link",
  73         .groups  = bt_link_groups,
  74         .release = bt_link_release,
  75 };
  76
  77 /*
  78  * The rfcomm tty device will possibly retain even when conn
  79  * is down, and sysfs doesn't support move zombie device,
  80  * so we should move the device before conn device is destroyed.
  81  */
  82 static int __match_tty(struct device *dev, void *data)
  83 {
  84         return !strncmp(dev_name(dev), "rfcomm", 6);
  85 }
  86
  87 void hci_conn_init_sysfs(struct hci_conn *conn)
  88 {
  89         struct hci_dev *hdev = conn->hdev;
  90
  91         BT_DBG("conn %p", conn);
  92
  93         conn->dev.type = &bt_link;
  94         conn->dev.class = bt_class;
  95         conn->dev.parent = &hdev->dev;
  96
  97         device_initialize(&conn->dev);
  98 }
  99
 100 void hci_conn_add_sysfs(struct hci_conn *conn)
 101 {
 102         struct hci_dev *hdev = conn->hdev;
 103
 104         BT_DBG("conn %p", conn);
 105
 106         dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle);
 107
 108         if (device_add(&conn->dev) < 0) {
 109                 BT_ERR("Failed to register connection device");
 110                 return;
 111         }
 112
 113         hci_dev_hold(hdev);
 114 }
 115
 116 void hci_conn_del_sysfs(struct hci_conn *conn)
 117 {
 118         struct hci_dev *hdev = conn->hdev;
 119
 120         if (!device_is_registered(&conn->dev))
 121                 return;
 122
 123         while (1) {
 124                 struct device *dev;
 125
 126                 dev = device_find_child(&conn->dev, NULL, __match_tty);
 127                 if (!dev)
 128                         break;
 129                 device_move(dev, NULL, DPM_ORDER_DEV_LAST);
 130                 put_device(dev);
 131         }
 132
 133         device_del(&conn->dev);
 134
 135         hci_dev_put(hdev);
 136 }
 137
 138 static inline char *host_typetostr(int type)
 139 {
 140         switch (type) {
 141         case HCI_BREDR:
 142                 return "BR/EDR";
 143         case HCI_AMP:
 144                 return "AMP";
 145         default:
 146                 return "UNKNOWN";
 147         }
 148 }
 149
 150 static ssize_t show_type(struct device *dev,
 151                          struct device_attribute *attr, char *buf)
 152 {
 153         struct hci_dev *hdev = to_hci_dev(dev);
 154         return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type));
 155 }
 156
 157 static ssize_t show_name(struct device *dev,
 158                          struct device_attribute *attr, char *buf)
 159 {
 160         struct hci_dev *hdev = to_hci_dev(dev);
 161         char name[HCI_MAX_NAME_LENGTH + 1];
 162         int i;
 163
 164         for (i = 0; i < HCI_MAX_NAME_LENGTH; i++)
 165                 name[i] = hdev->dev_name[i];
 166
 167         name[HCI_MAX_NAME_LENGTH] = '\0';
 168         return sprintf(buf, "%s\n", name);
 169 }
 170
 171 static ssize_t show_address(struct device *dev,
 172                             struct device_attribute *attr, char *buf)
 173 {
 174         struct hci_dev *hdev = to_hci_dev(dev);
 175         return sprintf(buf, "%pMR\n", &hdev->bdaddr);
 176 }
 177
 178 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 179 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 180 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
 181
 182 static struct attribute *bt_host_attrs[] = {
 183         &dev_attr_type.attr,
 184         &dev_attr_name.attr,
 185         &dev_attr_address.attr,
 186         NULL
 187 };
 188
 189 #ifdef CONFIG_TIZEN_WIP
 190 static struct attribute_group bt_host_group = {
 191         .attrs = bt_host_attrs,
 192 };
 193
 194 static const struct attribute_group *bt_host_groups[] = {
 195         &bt_host_group,
 196         NULL
 197 };
 198 #else
 199 ATTRIBUTE_GROUPS(bt_host);
 200 #endif
 201
 202 static void bt_host_release(struct device *dev)
 203 {
 204         struct hci_dev *hdev = to_hci_dev(dev);
 205         kfree(hdev);
 206         module_put(THIS_MODULE);
 207 }
 208
 209 static struct device_type bt_host = {
 210         .name    = "host",
 211         .groups  = bt_host_groups,
 212         .release = bt_host_release,
 213 };
 214
 215 void hci_init_sysfs(struct hci_dev *hdev)
 216 {
 217         struct device *dev = &hdev->dev;
 218
 219         dev->type = &bt_host;
 220         dev->class = bt_class;
 221
 222         __module_get(THIS_MODULE);
 223         device_initialize(dev);
 224 }
 225
 226 int __init bt_sysfs_init(void)
 227 {
 228         bt_class = class_create(THIS_MODULE, "bluetooth");
 229 #ifdef CONFIG_TIZEN_WIP
 230         return PTR_RET(bt_class);
 231 #else
 232         return PTR_ERR_OR_ZERO(bt_class);
 233 #endif
 234
 235 }
 236
 237 void bt_sysfs_cleanup(void)
 238 {
 239         class_destroy(bt_class);
 240 }