/* Bluetooth HCI driver model support. */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> struct class *bt_class = NULL; EXPORT_SYMBOL_GPL(bt_class); struct dentry *bt_debugfs = NULL; EXPORT_SYMBOL_GPL(bt_debugfs); static struct workqueue_struct *bt_workq; static inline char *link_typetostr(int type) { switch (type) { case ACL_LINK: return "ACL"; case SCO_LINK: return "SCO"; case ESCO_LINK: return "eSCO"; default: return "UNKNOWN"; } } static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_conn *conn = dev_get_drvdata(dev); return sprintf(buf, "%s\n", link_typetostr(conn->type)); } static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_conn *conn = dev_get_drvdata(dev); bdaddr_t bdaddr; baswap(&bdaddr, &conn->dst); return sprintf(buf, "%s\n", batostr(&bdaddr)); } static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_conn *conn = dev_get_drvdata(dev); return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", conn->features[0], conn->features[1], conn->features[2], conn->features[3], conn->features[4], conn->features[5], conn->features[6], conn->features[7]); } #define LINK_ATTR(_name,_mode,_show,_store) \ struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store) static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); static struct attribute *bt_link_attrs[] = { &link_attr_type.attr, &link_attr_address.attr, &link_attr_features.attr, NULL }; static struct attribute_group bt_link_group = { .attrs = bt_link_attrs, }; static const struct attribute_group *bt_link_groups[] = { &bt_link_group, NULL }; static void bt_link_release(struct device *dev) { void *data = dev_get_drvdata(dev); kfree(data); } static struct device_type bt_link = { .name = "link", .groups = bt_link_groups, .release = bt_link_release, }; static void add_conn(struct work_struct *work) { struct hci_conn *conn = container_of(work, struct hci_conn, work_add); struct hci_dev *hdev = conn->hdev; dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); dev_set_drvdata(&conn->dev, conn); if (device_add(&conn->dev) < 0) { BT_ERR("Failed to register connection device"); return; } hci_dev_hold(hdev); } /* * The rfcomm tty device will possibly retain even when conn * is down, and sysfs doesn't support move zombie device, * so we should move the device before conn device is destroyed. */ static int __match_tty(struct device *dev, void *data) { return !strncmp(dev_name(dev), "rfcomm", 6); } static void del_conn(struct work_struct *work) { struct hci_conn *conn = container_of(work, struct hci_conn, work_del); struct hci_dev *hdev = conn->hdev; if (!device_is_registered(&conn->dev)) return; while (1) { struct device *dev; dev = device_find_child(&conn->dev, NULL, __match_tty); if (!dev) break; device_move(dev, NULL, DPM_ORDER_DEV_LAST); put_device(dev); } device_del(&conn->dev); put_device(&conn->dev); hci_dev_put(hdev); } void hci_conn_init_sysfs(struct hci_conn *conn) { struct hci_dev *hdev = conn->hdev; BT_DBG("conn %p", conn); conn->dev.type = &bt_link; conn->dev.class = bt_class; conn->dev.parent = &hdev->dev; device_initialize(&conn->dev); INIT_WORK(&conn->work_add, add_conn); INIT_WORK(&conn->work_del, del_conn); } void hci_conn_add_sysfs(struct hci_conn *conn) { BT_DBG("conn %p", conn); queue_work(bt_workq, &conn->work_add); } void hci_conn_del_sysfs(struct hci_conn *conn) { BT_DBG("conn %p", conn); queue_work(bt_workq, &conn->work_del); } static inline char *host_bustostr(int bus) { switch (bus) { case HCI_VIRTUAL: return "VIRTUAL"; case HCI_USB: return "USB"; case HCI_PCCARD: return "PCCARD"; case HCI_UART: return "UART"; case HCI_RS232: return "RS232"; case HCI_PCI: return "PCI"; case HCI_SDIO: return "SDIO"; default: return "UNKNOWN"; } } static inline char *host_typetostr(int type) { switch (type) { case HCI_BREDR: return "BR/EDR"; case HCI_80211: return "802.11"; default: return "UNKNOWN"; } } static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); } static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); } static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); char name[249]; int i; for (i = 0; i < 248; i++) name[i] = hdev->dev_name[i]; name[248] = '\0'; return sprintf(buf, "%s\n", name); } static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "0x%.2x%.2x%.2x\n", hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); } static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); bdaddr_t bdaddr; baswap(&bdaddr, &hdev->bdaddr); return sprintf(buf, "%s\n", batostr(&bdaddr)); } static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", hdev->features[0], hdev->features[1], hdev->features[2], hdev->features[3], hdev->features[4], hdev->features[5], hdev->features[6], hdev->features[7]); } static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->manufacturer); } static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->hci_ver); } static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->hci_rev); } static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->idle_timeout); } static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hci_dev *hdev = dev_get_drvdata(dev); char *ptr; __u32 val; val = simple_strtoul(buf, &ptr, 10); if (ptr == buf) return -EINVAL; if (val != 0 && (val < 500 || val > 3600000)) return -EINVAL; hdev->idle_timeout = val; return count; } static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->sniff_max_interval); } static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hci_dev *hdev = dev_get_drvdata(dev); char *ptr; __u16 val; val = simple_strtoul(buf, &ptr, 10); if (ptr == buf) return -EINVAL; if (val < 0x0002 || val > 0xFFFE || val % 2) return -EINVAL; if (val < hdev->sniff_min_interval) return -EINVAL; hdev->sniff_max_interval = val; return count; } static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) { struct hci_dev *hdev = dev_get_drvdata(dev); return sprintf(buf, "%d\n", hdev->sniff_min_interval); } static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hci_dev *hdev = dev_get_drvdata(dev); char *ptr; __u16 val; val = simple_strtoul(buf, &ptr, 10); if (ptr == buf) return -EINVAL; if (val < 0x0002 || val > 0xFFFE || val % 2) return -EINVAL; if (val > hdev->sniff_max_interval) return -EINVAL; hdev->sniff_min_interval = val; return count; } static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, show_idle_timeout, store_idle_timeout); static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, show_sniff_max_interval, store_sniff_max_interval); static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, show_sniff_min_interval, store_sniff_min_interval); static struct attribute *bt_host_attrs[] = { &dev_attr_bus.attr, &dev_attr_type.attr, &dev_attr_name.attr, &dev_attr_class.attr, &dev_attr_address.attr, &dev_attr_features.attr, &dev_attr_manufacturer.attr, &dev_attr_hci_version.attr, &dev_attr_hci_revision.attr, &dev_attr_idle_timeout.attr, &dev_attr_sniff_max_interval.attr, &dev_attr_sniff_min_interval.attr, NULL }; static struct attribute_group bt_host_group = { .attrs = bt_host_attrs, }; static const struct attribute_group *bt_host_groups[] = { &bt_host_group, NULL }; static void bt_host_release(struct device *dev) { void *data = dev_get_drvdata(dev); kfree(data); } static struct device_type bt_host = { .name = "host", .groups = bt_host_groups, .release = bt_host_release, }; static int inquiry_cache_show(struct seq_file *f, void *p) { struct hci_dev *hdev = f->private; struct inquiry_cache *cache = &hdev->inq_cache; struct inquiry_entry *e; hci_dev_lock_bh(hdev); for (e = cache->list; e; e = e->next) { struct inquiry_data *data = &e->data; bdaddr_t bdaddr; baswap(&bdaddr, &data->bdaddr); seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", batostr(&bdaddr), data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode, data->dev_class[2], data->dev_class[1], data->dev_class[0], __le16_to_cpu(data->clock_offset), data->rssi, data->ssp_mode, e->timestamp); } hci_dev_unlock_bh(hdev); return 0; } static int inquiry_cache_open(struct inode *inode, struct file *file) { return single_open(file, inquiry_cache_show, inode->i_private); } static const struct file_operations inquiry_cache_fops = { .open = inquiry_cache_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; int hci_register_sysfs(struct hci_dev *hdev) { struct device *dev = &hdev->dev; int err; BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); dev->type = &bt_host; dev->class = bt_class; dev->parent = hdev->parent; dev_set_name(dev, "%s", hdev->name); dev_set_drvdata(dev, hdev); err = device_register(dev); if (err < 0) return err; if (!bt_debugfs) return 0; hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); if (!hdev->debugfs) return 0; debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, hdev, &inquiry_cache_fops); return 0; } void hci_unregister_sysfs(struct hci_dev *hdev) { BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); debugfs_remove_recursive(hdev->debugfs); device_del(&hdev->dev); } int __init bt_sysfs_init(void) { bt_workq = create_singlethread_workqueue("bluetooth"); if (!bt_workq) return -ENOMEM; bt_debugfs = debugfs_create_dir("bluetooth", NULL); bt_class = class_create(THIS_MODULE, "bluetooth"); if (IS_ERR(bt_class)) { destroy_workqueue(bt_workq); return PTR_ERR(bt_class); } return 0; } void bt_sysfs_cleanup(void) { class_destroy(bt_class); debugfs_remove_recursive(bt_debugfs); destroy_workqueue(bt_workq); }