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 <linux/platform_device.h>
   7
   8 #include <net/bluetooth/bluetooth.h>
   9 #include <net/bluetooth/hci_core.h>
  10
  11 #ifndef CONFIG_BT_HCI_CORE_DEBUG
  12 #undef  BT_DBG
  13 #define BT_DBG(D...)
  14 #endif
  15
  16 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
  17 {
  18         struct hci_dev *hdev = dev_get_drvdata(dev);
  19         return sprintf(buf, "%s\n", hdev->name);
  20 }
  21
  22 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
  23 {
  24         struct hci_dev *hdev = dev_get_drvdata(dev);
  25         return sprintf(buf, "%d\n", hdev->type);
  26 }
  27
  28 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
  29 {
  30         struct hci_dev *hdev = dev_get_drvdata(dev);
  31         bdaddr_t bdaddr;
  32         baswap(&bdaddr, &hdev->bdaddr);
  33         return sprintf(buf, "%s\n", batostr(&bdaddr));
  34 }
  35
  36 static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf)
  37 {
  38         struct hci_dev *hdev = dev_get_drvdata(dev);
  39         return sprintf(buf, "0x%lx\n", hdev->flags);
  40 }
  41
  42 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
  43 {
  44         struct hci_dev *hdev = dev_get_drvdata(dev);
  45         struct inquiry_cache *cache = &hdev->inq_cache;
  46         struct inquiry_entry *e;
  47         int n = 0;
  48
  49         hci_dev_lock_bh(hdev);
  50
  51         for (e = cache->list; e; e = e->next) {
  52                 struct inquiry_data *data = &e->data;
  53                 bdaddr_t bdaddr;
  54                 baswap(&bdaddr, &data->bdaddr);
  55                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %u\n",
  56                                 batostr(&bdaddr),
  57                                 data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode,
  58                                 data->dev_class[2], data->dev_class[1], data->dev_class[0],
  59                                 __le16_to_cpu(data->clock_offset), data->rssi, e->timestamp);
  60         }
  61
  62         hci_dev_unlock_bh(hdev);
  63         return n;
  64 }
  65
  66 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
  67 {
  68         struct hci_dev *hdev = dev_get_drvdata(dev);
  69         return sprintf(buf, "%d\n", hdev->idle_timeout);
  70 }
  71
  72 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
  73 {
  74         struct hci_dev *hdev = dev_get_drvdata(dev);
  75         char *ptr;
  76         __u32 val;
  77
  78         val = simple_strtoul(buf, &ptr, 10);
  79         if (ptr == buf)
  80                 return -EINVAL;
  81
  82         if (val != 0 && (val < 500 || val > 3600000))
  83                 return -EINVAL;
  84
  85         hdev->idle_timeout = val;
  86
  87         return count;
  88 }
  89
  90 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
  91 {
  92         struct hci_dev *hdev = dev_get_drvdata(dev);
  93         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
  94 }
  95
  96 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
  97 {
  98         struct hci_dev *hdev = dev_get_drvdata(dev);
  99         char *ptr;
 100         __u16 val;
 101
 102         val = simple_strtoul(buf, &ptr, 10);
 103         if (ptr == buf)
 104                 return -EINVAL;
 105
 106         if (val < 0x0002 || val > 0xFFFE || val % 2)
 107                 return -EINVAL;
 108
 109         if (val < hdev->sniff_min_interval)
 110                 return -EINVAL;
 111
 112         hdev->sniff_max_interval = val;
 113
 114         return count;
 115 }
 116
 117 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
 118 {
 119         struct hci_dev *hdev = dev_get_drvdata(dev);
 120         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
 121 }
 122
 123 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 124 {
 125         struct hci_dev *hdev = dev_get_drvdata(dev);
 126         char *ptr;
 127         __u16 val;
 128
 129         val = simple_strtoul(buf, &ptr, 10);
 130         if (ptr == buf)
 131                 return -EINVAL;
 132
 133         if (val < 0x0002 || val > 0xFFFE || val % 2)
 134                 return -EINVAL;
 135
 136         if (val > hdev->sniff_max_interval)
 137                 return -EINVAL;
 138
 139         hdev->sniff_min_interval = val;
 140
 141         return count;
 142 }
 143
 144 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
 145 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 146 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
 147 static DEVICE_ATTR(flags, S_IRUGO, show_flags, NULL);
 148 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
 149
 150 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
 151                                 show_idle_timeout, store_idle_timeout);
 152 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
 153                                 show_sniff_max_interval, store_sniff_max_interval);
 154 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
 155                                 show_sniff_min_interval, store_sniff_min_interval);
 156
 157 static struct device_attribute *bt_attrs[] = {
 158         &dev_attr_name,
 159         &dev_attr_type,
 160         &dev_attr_address,
 161         &dev_attr_flags,
 162         &dev_attr_inquiry_cache,
 163         &dev_attr_idle_timeout,
 164         &dev_attr_sniff_max_interval,
 165         &dev_attr_sniff_min_interval,
 166         NULL
 167 };
 168
 169 struct class *bt_class = NULL;
 170 EXPORT_SYMBOL_GPL(bt_class);
 171
 172 static struct bus_type bt_bus = {
 173         .name   = "bluetooth",
 174 };
 175
 176 static struct platform_device *bt_platform;
 177
 178 static void bt_release(struct device *dev)
 179 {
 180         struct hci_dev *hdev = dev_get_drvdata(dev);
 181         kfree(hdev);
 182 }
 183
 184 int hci_register_sysfs(struct hci_dev *hdev)
 185 {
 186         struct device *dev = &hdev->dev;
 187         unsigned int i;
 188         int err;
 189
 190         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 191
 192         dev->class = bt_class;
 193
 194         if (hdev->parent)
 195                 dev->parent = hdev->parent;
 196         else
 197                 dev->parent = &bt_platform->dev;
 198
 199         strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
 200
 201         dev->release = bt_release;
 202
 203         dev_set_drvdata(dev, hdev);
 204
 205         err = device_register(dev);
 206         if (err < 0)
 207                 return err;
 208
 209         for (i = 0; bt_attrs[i]; i++)
 210                 device_create_file(dev, bt_attrs[i]);
 211
 212         return 0;
 213 }
 214
 215 void hci_unregister_sysfs(struct hci_dev *hdev)
 216 {
 217         struct device *dev = &hdev->dev;
 218
 219         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 220
 221         device_del(dev);
 222 }
 223
 224 int __init bt_sysfs_init(void)
 225 {
 226         int err;
 227
 228         bt_platform = platform_device_register_simple("bluetooth", -1, NULL, 0);
 229         if (IS_ERR(bt_platform))
 230                 return PTR_ERR(bt_platform);
 231
 232         err = bus_register(&bt_bus);
 233         if (err < 0) {
 234                 platform_device_unregister(bt_platform);
 235                 return err;
 236         }
 237
 238         bt_class = class_create(THIS_MODULE, "bluetooth");
 239         if (IS_ERR(bt_class)) {
 240                 bus_unregister(&bt_bus);
 241                 platform_device_unregister(bt_platform);
 242                 return PTR_ERR(bt_class);
 243         }
 244
 245         return 0;
 246 }
 247
 248 void __exit bt_sysfs_cleanup(void)
 249 {
 250         class_destroy(bt_class);
 251
 252         bus_unregister(&bt_bus);
 253
 254         platform_device_unregister(bt_platform);
 255 }