net/bluetooth/hci_sysfs.c

   1 /* Bluetooth HCI driver model support. */
   2
   3 #include <linux/config.h>
   4 #include <linux/kernel.h>
   5 #include <linux/init.h>
   6
   7 #include <net/bluetooth/bluetooth.h>
   8 #include <net/bluetooth/hci_core.h>
   9
  10 #ifndef CONFIG_BT_HCI_CORE_DEBUG
  11 #undef  BT_DBG
  12 #define BT_DBG(D...)
  13 #endif
  14
  15 static ssize_t show_name(struct class_device *cdev, char *buf)
  16 {
  17         struct hci_dev *hdev = class_get_devdata(cdev);
  18         return sprintf(buf, "%s\n", hdev->name);
  19 }
  20
  21 static ssize_t show_type(struct class_device *cdev, char *buf)
  22 {
  23         struct hci_dev *hdev = class_get_devdata(cdev);
  24         return sprintf(buf, "%d\n", hdev->type);
  25 }
  26
  27 static ssize_t show_address(struct class_device *cdev, char *buf)
  28 {
  29         struct hci_dev *hdev = class_get_devdata(cdev);
  30         bdaddr_t bdaddr;
  31         baswap(&bdaddr, &hdev->bdaddr);
  32         return sprintf(buf, "%s\n", batostr(&bdaddr));
  33 }
  34
  35 static ssize_t show_flags(struct class_device *cdev, char *buf)
  36 {
  37         struct hci_dev *hdev = class_get_devdata(cdev);
  38         return sprintf(buf, "0x%lx\n", hdev->flags);
  39 }
  40
  41 static ssize_t show_inquiry_cache(struct class_device *cdev, char *buf)
  42 {
  43         struct hci_dev *hdev = class_get_devdata(cdev);
  44         struct inquiry_cache *cache = &hdev->inq_cache;
  45         struct inquiry_entry *e;
  46         int n = 0;
  47
  48         hci_dev_lock_bh(hdev);
  49
  50         for (e = cache->list; e; e = e->next) {
  51                 struct inquiry_data *data = &e->data;
  52                 bdaddr_t bdaddr;
  53                 baswap(&bdaddr, &data->bdaddr);
  54                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %u\n",
  55                                 batostr(&bdaddr),
  56                                 data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode,
  57                                 data->dev_class[2], data->dev_class[1], data->dev_class[0],
  58                                 __le16_to_cpu(data->clock_offset), data->rssi, e->timestamp);
  59         }
  60
  61         hci_dev_unlock_bh(hdev);
  62         return n;
  63 }
  64
  65 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
  66 static CLASS_DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
  67 static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
  68 static CLASS_DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL);
  69 static CLASS_DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
  70
  71 static struct class_device_attribute *bt_attrs[] = {
  72         &class_device_attr_name,
  73         &class_device_attr_type,
  74         &class_device_attr_address,
  75         &class_device_attr_flags,
  76         &class_device_attr_inquiry_cache,
  77         NULL
  78 };
  79
  80 #ifdef CONFIG_HOTPLUG
  81 static int bt_hotplug(struct class_device *cdev, char **envp, int num_envp, char *buf, int size)
  82 {
  83         struct hci_dev *hdev = class_get_devdata(cdev);
  84         int n, i = 0;
  85
  86         envp[i++] = buf;
  87         n = snprintf(buf, size, "INTERFACE=%s", hdev->name) + 1;
  88         buf += n;
  89         size -= n;
  90
  91         if ((size <= 0) || (i >= num_envp))
  92                 return -ENOMEM;
  93
  94         envp[i] = NULL;
  95         return 0;
  96 }
  97 #endif
  98
  99 static void bt_release(struct class_device *cdev)
 100 {
 101         struct hci_dev *hdev = class_get_devdata(cdev);
 102
 103         kfree(hdev);
 104 }
 105
 106 struct class bt_class = {
 107         .name           = "bluetooth",
 108         .release        = bt_release,
 109 #ifdef CONFIG_HOTPLUG
 110         .hotplug        = bt_hotplug,
 111 #endif
 112 };
 113
 114 EXPORT_SYMBOL_GPL(bt_class);
 115
 116 int hci_register_sysfs(struct hci_dev *hdev)
 117 {
 118         struct class_device *cdev = &hdev->class_dev;
 119         unsigned int i;
 120         int err;
 121
 122         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 123
 124         cdev->class = &bt_class;
 125         class_set_devdata(cdev, hdev);
 126
 127         strlcpy(cdev->class_id, hdev->name, BUS_ID_SIZE);
 128         err = class_device_register(cdev);
 129         if (err < 0)
 130                 return err;
 131
 132         for (i = 0; bt_attrs[i]; i++)
 133                 class_device_create_file(cdev, bt_attrs[i]);
 134
 135         return 0;
 136 }
 137
 138 void hci_unregister_sysfs(struct hci_dev *hdev)
 139 {
 140         struct class_device * cdev = &hdev->class_dev;
 141
 142         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 143
 144         class_device_del(cdev);
 145 }
 146
 147 int __init bt_sysfs_init(void)
 148 {
 149         return class_register(&bt_class);
 150 }
 151
 152 void __exit bt_sysfs_cleanup(void)
 153 {
 154         class_unregister(&bt_class);
 155 }