net/bluetooth/hci_sysfs.c

   1 /* Bluetooth HCI driver model support. */
   2
   3 #include <linux/kernel.h>
   4 #include <linux/init.h>
   5
   6 #include <net/bluetooth/bluetooth.h>
   7 #include <net/bluetooth/hci_core.h>
   8
   9 #ifndef CONFIG_BT_HCI_CORE_DEBUG
  10 #undef  BT_DBG
  11 #define BT_DBG(D...)
  12 #endif
  13
  14 static ssize_t show_name(struct class_device *cdev, char *buf)
  15 {
  16         struct hci_dev *hdev = class_get_devdata(cdev);
  17         return sprintf(buf, "%s\n", hdev->name);
  18 }
  19
  20 static ssize_t show_type(struct class_device *cdev, char *buf)
  21 {
  22         struct hci_dev *hdev = class_get_devdata(cdev);
  23         return sprintf(buf, "%d\n", hdev->type);
  24 }
  25
  26 static ssize_t show_address(struct class_device *cdev, char *buf)
  27 {
  28         struct hci_dev *hdev = class_get_devdata(cdev);
  29         bdaddr_t bdaddr;
  30         baswap(&bdaddr, &hdev->bdaddr);
  31         return sprintf(buf, "%s\n", batostr(&bdaddr));
  32 }
  33
  34 static ssize_t show_flags(struct class_device *cdev, char *buf)
  35 {
  36         struct hci_dev *hdev = class_get_devdata(cdev);
  37         return sprintf(buf, "0x%lx\n", hdev->flags);
  38 }
  39
  40 static ssize_t show_inquiry_cache(struct class_device *cdev, char *buf)
  41 {
  42         struct hci_dev *hdev = class_get_devdata(cdev);
  43         struct inquiry_cache *cache = &hdev->inq_cache;
  44         struct inquiry_entry *e;
  45         int n = 0;
  46
  47         hci_dev_lock_bh(hdev);
  48
  49         for (e = cache->list; e; e = e->next) {
  50                 struct inquiry_data *data = &e->data;
  51                 bdaddr_t bdaddr;
  52                 baswap(&bdaddr, &data->bdaddr);
  53                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %u\n",
  54                                 batostr(&bdaddr),
  55                                 data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode,
  56                                 data->dev_class[2], data->dev_class[1], data->dev_class[0],
  57                                 __le16_to_cpu(data->clock_offset), data->rssi, e->timestamp);
  58         }
  59
  60         hci_dev_unlock_bh(hdev);
  61         return n;
  62 }
  63
  64 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
  65 static CLASS_DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
  66 static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
  67 static CLASS_DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL);
  68 static CLASS_DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
  69
  70 static struct class_device_attribute *bt_attrs[] = {
  71         &class_device_attr_name,
  72         &class_device_attr_type,
  73         &class_device_attr_address,
  74         &class_device_attr_flags,
  75         &class_device_attr_inquiry_cache,
  76         NULL
  77 };
  78
  79 #ifdef CONFIG_HOTPLUG
  80 static int bt_uevent(struct class_device *cdev, char **envp, int num_envp, char *buf, int size)
  81 {
  82         struct hci_dev *hdev = class_get_devdata(cdev);
  83         int n, i = 0;
  84
  85         envp[i++] = buf;
  86         n = snprintf(buf, size, "INTERFACE=%s", hdev->name) + 1;
  87         buf += n;
  88         size -= n;
  89
  90         if ((size <= 0) || (i >= num_envp))
  91                 return -ENOMEM;
  92
  93         envp[i] = NULL;
  94         return 0;
  95 }
  96 #endif
  97
  98 static void bt_release(struct class_device *cdev)
  99 {
 100         struct hci_dev *hdev = class_get_devdata(cdev);
 101
 102         kfree(hdev);
 103 }
 104
 105 struct class bt_class = {
 106         .name           = "bluetooth",
 107         .release        = bt_release,
 108 #ifdef CONFIG_HOTPLUG
 109         .uevent         = bt_uevent,
 110 #endif
 111 };
 112
 113 EXPORT_SYMBOL_GPL(bt_class);
 114
 115 int hci_register_sysfs(struct hci_dev *hdev)
 116 {
 117         struct class_device *cdev = &hdev->class_dev;
 118         unsigned int i;
 119         int err;
 120
 121         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 122
 123         cdev->class = &bt_class;
 124         class_set_devdata(cdev, hdev);
 125
 126         strlcpy(cdev->class_id, hdev->name, BUS_ID_SIZE);
 127         err = class_device_register(cdev);
 128         if (err < 0)
 129                 return err;
 130
 131         for (i = 0; bt_attrs[i]; i++)
 132                 class_device_create_file(cdev, bt_attrs[i]);
 133
 134         return 0;
 135 }
 136
 137 void hci_unregister_sysfs(struct hci_dev *hdev)
 138 {
 139         struct class_device * cdev = &hdev->class_dev;
 140
 141         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 142
 143         class_device_del(cdev);
 144 }
 145
 146 int __init bt_sysfs_init(void)
 147 {
 148         return class_register(&bt_class);
 149 }
 150
 151 void __exit bt_sysfs_cleanup(void)
 152 {
 153         class_unregister(&bt_class);
 154 }