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 inline char *typetostr(int type)
  17 {
  18         switch (type) {
  19         case HCI_VIRTUAL:
  20                 return "VIRTUAL";
  21         case HCI_USB:
  22                 return "USB";
  23         case HCI_PCCARD:
  24                 return "PCCARD";
  25         case HCI_UART:
  26                 return "UART";
  27         case HCI_RS232:
  28                 return "RS232";
  29         case HCI_PCI:
  30                 return "PCI";
  31         case HCI_SDIO:
  32                 return "SDIO";
  33         default:
  34                 return "UNKNOWN";
  35         }
  36 }
  37
  38 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
  39 {
  40         struct hci_dev *hdev = dev_get_drvdata(dev);
  41         return sprintf(buf, "%s\n", typetostr(hdev->type));
  42 }
  43
  44 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
  45 {
  46         struct hci_dev *hdev = dev_get_drvdata(dev);
  47         bdaddr_t bdaddr;
  48         baswap(&bdaddr, &hdev->bdaddr);
  49         return sprintf(buf, "%s\n", batostr(&bdaddr));
  50 }
  51
  52 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
  53 {
  54         struct hci_dev *hdev = dev_get_drvdata(dev);
  55         struct inquiry_cache *cache = &hdev->inq_cache;
  56         struct inquiry_entry *e;
  57         int n = 0;
  58
  59         hci_dev_lock_bh(hdev);
  60
  61         for (e = cache->list; e; e = e->next) {
  62                 struct inquiry_data *data = &e->data;
  63                 bdaddr_t bdaddr;
  64                 baswap(&bdaddr, &data->bdaddr);
  65                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %u\n",
  66                                 batostr(&bdaddr),
  67                                 data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode,
  68                                 data->dev_class[2], data->dev_class[1], data->dev_class[0],
  69                                 __le16_to_cpu(data->clock_offset), data->rssi, e->timestamp);
  70         }
  71
  72         hci_dev_unlock_bh(hdev);
  73         return n;
  74 }
  75
  76 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
  77 {
  78         struct hci_dev *hdev = dev_get_drvdata(dev);
  79         return sprintf(buf, "%d\n", hdev->idle_timeout);
  80 }
  81
  82 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
  83 {
  84         struct hci_dev *hdev = dev_get_drvdata(dev);
  85         char *ptr;
  86         __u32 val;
  87
  88         val = simple_strtoul(buf, &ptr, 10);
  89         if (ptr == buf)
  90                 return -EINVAL;
  91
  92         if (val != 0 && (val < 500 || val > 3600000))
  93                 return -EINVAL;
  94
  95         hdev->idle_timeout = val;
  96
  97         return count;
  98 }
  99
 100 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
 101 {
 102         struct hci_dev *hdev = dev_get_drvdata(dev);
 103         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
 104 }
 105
 106 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 107 {
 108         struct hci_dev *hdev = dev_get_drvdata(dev);
 109         char *ptr;
 110         __u16 val;
 111
 112         val = simple_strtoul(buf, &ptr, 10);
 113         if (ptr == buf)
 114                 return -EINVAL;
 115
 116         if (val < 0x0002 || val > 0xFFFE || val % 2)
 117                 return -EINVAL;
 118
 119         if (val < hdev->sniff_min_interval)
 120                 return -EINVAL;
 121
 122         hdev->sniff_max_interval = val;
 123
 124         return count;
 125 }
 126
 127 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
 128 {
 129         struct hci_dev *hdev = dev_get_drvdata(dev);
 130         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
 131 }
 132
 133 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 134 {
 135         struct hci_dev *hdev = dev_get_drvdata(dev);
 136         char *ptr;
 137         __u16 val;
 138
 139         val = simple_strtoul(buf, &ptr, 10);
 140         if (ptr == buf)
 141                 return -EINVAL;
 142
 143         if (val < 0x0002 || val > 0xFFFE || val % 2)
 144                 return -EINVAL;
 145
 146         if (val > hdev->sniff_max_interval)
 147                 return -EINVAL;
 148
 149         hdev->sniff_min_interval = val;
 150
 151         return count;
 152 }
 153
 154 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
 155 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
 156 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
 157
 158 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
 159                                 show_idle_timeout, store_idle_timeout);
 160 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
 161                                 show_sniff_max_interval, store_sniff_max_interval);
 162 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
 163                                 show_sniff_min_interval, store_sniff_min_interval);
 164
 165 static struct device_attribute *bt_attrs[] = {
 166         &dev_attr_type,
 167         &dev_attr_address,
 168         &dev_attr_inquiry_cache,
 169         &dev_attr_idle_timeout,
 170         &dev_attr_sniff_max_interval,
 171         &dev_attr_sniff_min_interval,
 172         NULL
 173 };
 174
 175 static ssize_t show_conn_type(struct device *dev, struct device_attribute *attr, char *buf)
 176 {
 177         struct hci_conn *conn = dev_get_drvdata(dev);
 178         return sprintf(buf, "%s\n", conn->type == ACL_LINK ? "ACL" : "SCO");
 179 }
 180
 181 static ssize_t show_conn_address(struct device *dev, struct device_attribute *attr, char *buf)
 182 {
 183         struct hci_conn *conn = dev_get_drvdata(dev);
 184         bdaddr_t bdaddr;
 185         baswap(&bdaddr, &conn->dst);
 186         return sprintf(buf, "%s\n", batostr(&bdaddr));
 187 }
 188
 189 #define CONN_ATTR(_name,_mode,_show,_store) \
 190 struct device_attribute conn_attr_##_name = __ATTR(_name,_mode,_show,_store)
 191
 192 static CONN_ATTR(type, S_IRUGO, show_conn_type, NULL);
 193 static CONN_ATTR(address, S_IRUGO, show_conn_address, NULL);
 194
 195 static struct device_attribute *conn_attrs[] = {
 196         &conn_attr_type,
 197         &conn_attr_address,
 198         NULL
 199 };
 200
 201 struct class *bt_class = NULL;
 202 EXPORT_SYMBOL_GPL(bt_class);
 203
 204 static struct bus_type bt_bus = {
 205         .name   = "bluetooth",
 206 };
 207
 208 static struct platform_device *bt_platform;
 209
 210 static void bt_release(struct device *dev)
 211 {
 212         void *data = dev_get_drvdata(dev);
 213         kfree(data);
 214 }
 215
 216 static void add_conn(void *data)
 217 {
 218         struct hci_conn *conn = data;
 219         int i;
 220
 221         device_register(&conn->dev);
 222
 223         for (i = 0; conn_attrs[i]; i++)
 224                 device_create_file(&conn->dev, conn_attrs[i]);
 225 }
 226
 227 void hci_conn_add_sysfs(struct hci_conn *conn)
 228 {
 229         struct hci_dev *hdev = conn->hdev;
 230         bdaddr_t *ba = &conn->dst;
 231
 232         BT_DBG("conn %p", conn);
 233
 234         conn->dev.parent  = &hdev->dev;
 235         conn->dev.release = bt_release;
 236
 237         snprintf(conn->dev.bus_id, BUS_ID_SIZE,
 238                         "%s%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X",
 239                         conn->type == ACL_LINK ? "acl" : "sco",
 240                         ba->b[5], ba->b[4], ba->b[3],
 241                         ba->b[2], ba->b[1], ba->b[0]);
 242
 243         dev_set_drvdata(&conn->dev, conn);
 244
 245         INIT_WORK(&conn->work, add_conn, (void *) conn);
 246
 247         schedule_work(&conn->work);
 248 }
 249
 250 static void del_conn(void *data)
 251 {
 252         struct hci_conn *conn = data;
 253         device_del(&conn->dev);
 254 }
 255
 256 void hci_conn_del_sysfs(struct hci_conn *conn)
 257 {
 258         BT_DBG("conn %p", conn);
 259
 260         INIT_WORK(&conn->work, del_conn, (void *) conn);
 261
 262         schedule_work(&conn->work);
 263 }
 264
 265 int hci_register_sysfs(struct hci_dev *hdev)
 266 {
 267         struct device *dev = &hdev->dev;
 268         unsigned int i;
 269         int err;
 270
 271         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 272
 273         dev->class = bt_class;
 274
 275         if (hdev->parent)
 276                 dev->parent = hdev->parent;
 277         else
 278                 dev->parent = &bt_platform->dev;
 279
 280         strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
 281
 282         dev->release = bt_release;
 283
 284         dev_set_drvdata(dev, hdev);
 285
 286         err = device_register(dev);
 287         if (err < 0)
 288                 return err;
 289
 290         for (i = 0; bt_attrs[i]; i++)
 291                 device_create_file(dev, bt_attrs[i]);
 292
 293         return 0;
 294 }
 295
 296 void hci_unregister_sysfs(struct hci_dev *hdev)
 297 {
 298         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
 299
 300         device_del(&hdev->dev);
 301 }
 302
 303 int __init bt_sysfs_init(void)
 304 {
 305         int err;
 306
 307         bt_platform = platform_device_register_simple("bluetooth", -1, NULL, 0);
 308         if (IS_ERR(bt_platform))
 309                 return PTR_ERR(bt_platform);
 310
 311         err = bus_register(&bt_bus);
 312         if (err < 0) {
 313                 platform_device_unregister(bt_platform);
 314                 return err;
 315         }
 316
 317         bt_class = class_create(THIS_MODULE, "bluetooth");
 318         if (IS_ERR(bt_class)) {
 319                 bus_unregister(&bt_bus);
 320                 platform_device_unregister(bt_platform);
 321                 return PTR_ERR(bt_class);
 322         }
 323
 324         return 0;
 325 }
 326
 327 void __exit bt_sysfs_cleanup(void)
 328 {
 329         class_destroy(bt_class);
 330
 331         bus_unregister(&bt_bus);
 332
 333         platform_device_unregister(bt_platform);
 334 }