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 ssize_t show_idle_timeout(struct class_device *cdev, char *buf)
  65 {
  66         struct hci_dev *hdev = class_get_devdata(cdev);
  67         return sprintf(buf, "%d\n", hdev->idle_timeout);
  68 }
  69
  70 static ssize_t store_idle_timeout(struct class_device *cdev, const char *buf, size_t count)
  71 {
  72         struct hci_dev *hdev = class_get_devdata(cdev);
  73         char *ptr;
  74         __u32 val;
  75
  76         val = simple_strtoul(buf, &ptr, 10);
  77         if (ptr == buf)
  78                 return -EINVAL;
  79
  80         if (val != 0 && (val < 500 || val > 3600000))
  81                 return -EINVAL;
  82
  83         hdev->idle_timeout = val;
  84
  85         return count;
  86 }
  87
  88 static ssize_t show_sniff_max_interval(struct class_device *cdev, char *buf)
  89 {
  90         struct hci_dev *hdev = class_get_devdata(cdev);
  91         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
  92 }
  93
  94 static ssize_t store_sniff_max_interval(struct class_device *cdev, const char *buf, size_t count)
  95 {
  96         struct hci_dev *hdev = class_get_devdata(cdev);
  97         char *ptr;
  98         __u16 val;
  99
 100         val = simple_strtoul(buf, &ptr, 10);
 101         if (ptr == buf)
 102                 return -EINVAL;
 103
 104         if (val < 0x0002 || val > 0xFFFE || val % 2)
 105                 return -EINVAL;
 106
 107         if (val < hdev->sniff_min_interval)
 108                 return -EINVAL;
 109
 110         hdev->sniff_max_interval = val;
 111
 112         return count;
 113 }
 114
 115 static ssize_t show_sniff_min_interval(struct class_device *cdev, char *buf)
 116 {
 117         struct hci_dev *hdev = class_get_devdata(cdev);
 118         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
 119 }
 120
 121 static ssize_t store_sniff_min_interval(struct class_device *cdev, const char *buf, size_t count)
 122 {
 123         struct hci_dev *hdev = class_get_devdata(cdev);
 124         char *ptr;
 125         __u16 val;
 126
 127         val = simple_strtoul(buf, &ptr, 10);
 128         if (ptr == buf)
 129                 return -EINVAL;
 130
 131         if (val < 0x0002 || val > 0xFFFE || val % 2)
 132                 return -EINVAL;
 133
 134         if (val > hdev->sniff_max_interval)
 135                 return -EINVAL;
 136
 137         hdev->sniff_min_interval = val;
 138
 139         return count;
 140 }
 141
 142 static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 143 static CLASS_DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 144 static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
 145 static CLASS_DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL);
 146 static CLASS_DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
 147
 148 static CLASS_DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
 149                                 show_idle_timeout, store_idle_timeout);
 150 static CLASS_DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
 151                                 show_sniff_max_interval, store_sniff_max_interval);
 152 static CLASS_DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
 153                                 show_sniff_min_interval, store_sniff_min_interval);
 154
 155 static struct class_device_attribute *bt_attrs[] = {
 156         &class_device_attr_name,
 157         &class_device_attr_type,
 158         &class_device_attr_address,
 159         &class_device_attr_flags,
 160         &class_device_attr_inquiry_cache,
 161         &class_device_attr_idle_timeout,
 162         &class_device_attr_sniff_max_interval,
 163         &class_device_attr_sniff_min_interval,
 164         NULL
 165 };
 166
 167 #ifdef CONFIG_HOTPLUG
 168 static int bt_uevent(struct class_device *cdev, char **envp, int num_envp, char *buf, int size)
 169 {
 170         struct hci_dev *hdev = class_get_devdata(cdev);
 171         int n, i = 0;
 172
 173         envp[i++] = buf;
 174         n = snprintf(buf, size, "INTERFACE=%s", hdev->name) + 1;
 175         buf += n;
 176         size -= n;
 177
 178         if ((size <= 0) || (i >= num_envp))
 179                 return -ENOMEM;
 180
 181         envp[i] = NULL;
 182         return 0;
 183 }
 184 #endif
 185
 186 static void bt_release(struct class_device *cdev)
 187 {
 188         struct hci_dev *hdev = class_get_devdata(cdev);
 189
 190         kfree(hdev);
 191 }
 192
 193 struct class bt_class = {
 194         .name           = "bluetooth",
 195         .release        = bt_release,
 196 #ifdef CONFIG_HOTPLUG
 197         .uevent         = bt_uevent,
 198 #endif
 199 };
 200
 201 EXPORT_SYMBOL_GPL(bt_class);
 202
 203 int hci_register_sysfs(struct hci_dev *hdev)
 204 {
 205         struct class_device *cdev = &hdev->class_dev;
 206         unsigned int i;
 207         int err;
 208
 209         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 210
 211         cdev->class = &bt_class;
 212         class_set_devdata(cdev, hdev);
 213
 214         strlcpy(cdev->class_id, hdev->name, BUS_ID_SIZE);
 215         err = class_device_register(cdev);
 216         if (err < 0)
 217                 return err;
 218
 219         for (i = 0; bt_attrs[i]; i++)
 220                 class_device_create_file(cdev, bt_attrs[i]);
 221
 222         return 0;
 223 }
 224
 225 void hci_unregister_sysfs(struct hci_dev *hdev)
 226 {
 227         struct class_device * cdev = &hdev->class_dev;
 228
 229         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 230
 231         class_device_del(cdev);
 232 }
 233
 234 int __init bt_sysfs_init(void)
 235 {
 236         return class_register(&bt_class);
 237 }
 238
 239 void __exit bt_sysfs_cleanup(void)
 240 {
 241         class_unregister(&bt_class);
 242 }