429 lines
10 KiB
C
429 lines
10 KiB
C
/* Bluetooth HCI driver model support. */
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#ifndef CONFIG_BT_HCI_CORE_DEBUG
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#undef BT_DBG
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#define BT_DBG(D...)
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#endif
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static inline char *typetostr(int type)
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{
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switch (type) {
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case HCI_VIRTUAL:
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return "VIRTUAL";
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case HCI_USB:
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return "USB";
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case HCI_PCCARD:
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return "PCCARD";
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case HCI_UART:
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return "UART";
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case HCI_RS232:
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return "RS232";
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case HCI_PCI:
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return "PCI";
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case HCI_SDIO:
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return "SDIO";
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default:
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return "UNKNOWN";
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}
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}
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static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", typetostr(hdev->type));
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}
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static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char name[249];
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int i;
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for (i = 0; i < 248; i++)
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name[i] = hdev->dev_name[i];
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name[248] = '\0';
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return sprintf(buf, "%s\n", name);
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}
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static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "0x%.2x%.2x%.2x\n",
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hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
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}
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static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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bdaddr_t bdaddr;
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baswap(&bdaddr, &hdev->bdaddr);
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return sprintf(buf, "%s\n", batostr(&bdaddr));
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}
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static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
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hdev->features[0], hdev->features[1],
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hdev->features[2], hdev->features[3],
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hdev->features[4], hdev->features[5],
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hdev->features[6], hdev->features[7]);
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}
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static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->manufacturer);
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}
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static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->hci_ver);
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}
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static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->hci_rev);
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}
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static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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struct inquiry_cache *cache = &hdev->inq_cache;
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struct inquiry_entry *e;
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int n = 0;
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hci_dev_lock_bh(hdev);
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for (e = cache->list; e; e = e->next) {
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struct inquiry_data *data = &e->data;
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bdaddr_t bdaddr;
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baswap(&bdaddr, &data->bdaddr);
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n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %u\n",
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batostr(&bdaddr),
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data->pscan_rep_mode, data->pscan_period_mode, data->pscan_mode,
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data->dev_class[2], data->dev_class[1], data->dev_class[0],
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__le16_to_cpu(data->clock_offset), data->rssi, e->timestamp);
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}
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hci_dev_unlock_bh(hdev);
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return n;
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}
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static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->idle_timeout);
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}
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static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u32 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val != 0 && (val < 500 || val > 3600000))
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return -EINVAL;
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hdev->idle_timeout = val;
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return count;
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}
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static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->sniff_max_interval);
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}
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static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u16 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val < 0x0002 || val > 0xFFFE || val % 2)
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return -EINVAL;
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if (val < hdev->sniff_min_interval)
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return -EINVAL;
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hdev->sniff_max_interval = val;
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return count;
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}
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static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", hdev->sniff_min_interval);
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}
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static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hci_dev *hdev = dev_get_drvdata(dev);
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char *ptr;
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__u16 val;
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val = simple_strtoul(buf, &ptr, 10);
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if (ptr == buf)
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return -EINVAL;
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if (val < 0x0002 || val > 0xFFFE || val % 2)
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return -EINVAL;
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if (val > hdev->sniff_max_interval)
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return -EINVAL;
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hdev->sniff_min_interval = val;
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return count;
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}
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static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
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static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
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static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
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static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
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static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
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static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
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static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
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static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
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static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
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static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
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show_idle_timeout, store_idle_timeout);
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static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
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show_sniff_max_interval, store_sniff_max_interval);
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static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
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show_sniff_min_interval, store_sniff_min_interval);
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static struct device_attribute *bt_attrs[] = {
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&dev_attr_type,
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&dev_attr_name,
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&dev_attr_class,
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&dev_attr_address,
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&dev_attr_features,
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&dev_attr_manufacturer,
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&dev_attr_hci_version,
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&dev_attr_hci_revision,
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&dev_attr_inquiry_cache,
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&dev_attr_idle_timeout,
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&dev_attr_sniff_max_interval,
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&dev_attr_sniff_min_interval,
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NULL
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};
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static ssize_t show_conn_type(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", conn->type == ACL_LINK ? "ACL" : "SCO");
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}
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static ssize_t show_conn_address(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hci_conn *conn = dev_get_drvdata(dev);
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bdaddr_t bdaddr;
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baswap(&bdaddr, &conn->dst);
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return sprintf(buf, "%s\n", batostr(&bdaddr));
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}
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#define CONN_ATTR(_name,_mode,_show,_store) \
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struct device_attribute conn_attr_##_name = __ATTR(_name,_mode,_show,_store)
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static CONN_ATTR(type, S_IRUGO, show_conn_type, NULL);
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static CONN_ATTR(address, S_IRUGO, show_conn_address, NULL);
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static struct device_attribute *conn_attrs[] = {
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&conn_attr_type,
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&conn_attr_address,
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NULL
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};
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struct class *bt_class = NULL;
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EXPORT_SYMBOL_GPL(bt_class);
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static struct bus_type bt_bus = {
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.name = "bluetooth",
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};
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static struct platform_device *bt_platform;
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static void bt_release(struct device *dev)
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{
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void *data = dev_get_drvdata(dev);
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kfree(data);
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}
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static void add_conn(struct work_struct *work)
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{
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struct hci_conn *conn = container_of(work, struct hci_conn, work);
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int i;
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if (device_add(&conn->dev) < 0) {
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BT_ERR("Failed to register connection device");
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return;
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}
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for (i = 0; conn_attrs[i]; i++)
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if (device_create_file(&conn->dev, conn_attrs[i]) < 0)
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BT_ERR("Failed to create connection attribute");
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}
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void hci_conn_add_sysfs(struct hci_conn *conn)
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{
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struct hci_dev *hdev = conn->hdev;
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bdaddr_t *ba = &conn->dst;
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BT_DBG("conn %p", conn);
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conn->dev.bus = &bt_bus;
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conn->dev.parent = &hdev->dev;
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conn->dev.release = bt_release;
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snprintf(conn->dev.bus_id, BUS_ID_SIZE,
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"%s%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X",
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conn->type == ACL_LINK ? "acl" : "sco",
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ba->b[5], ba->b[4], ba->b[3],
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ba->b[2], ba->b[1], ba->b[0]);
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dev_set_drvdata(&conn->dev, conn);
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device_initialize(&conn->dev);
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INIT_WORK(&conn->work, add_conn);
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schedule_work(&conn->work);
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}
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static int __match_tty(struct device *dev, void *data)
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{
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/* The rfcomm tty device will possibly retain even when conn
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* is down, and sysfs doesn't support move zombie device,
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* so we should move the device before conn device is destroyed.
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* Due to the only child device of hci_conn dev is rfcomm
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* tty_dev, here just return 1
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*/
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return 1;
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}
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static void del_conn(struct work_struct *work)
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{
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struct device *dev;
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struct hci_conn *conn = container_of(work, struct hci_conn, work);
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while (dev = device_find_child(&conn->dev, NULL, __match_tty)) {
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device_move(dev, NULL);
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put_device(dev);
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}
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device_del(&conn->dev);
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put_device(&conn->dev);
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}
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void hci_conn_del_sysfs(struct hci_conn *conn)
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{
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BT_DBG("conn %p", conn);
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if (!device_is_registered(&conn->dev))
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return;
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INIT_WORK(&conn->work, del_conn);
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schedule_work(&conn->work);
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}
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int hci_register_sysfs(struct hci_dev *hdev)
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{
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struct device *dev = &hdev->dev;
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unsigned int i;
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int err;
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BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
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dev->bus = &bt_bus;
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dev->parent = hdev->parent;
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strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
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dev->release = bt_release;
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dev_set_drvdata(dev, hdev);
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err = device_register(dev);
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if (err < 0)
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return err;
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for (i = 0; bt_attrs[i]; i++)
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if (device_create_file(dev, bt_attrs[i]) < 0)
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BT_ERR("Failed to create device attribute");
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if (sysfs_create_link(&bt_class->subsys.kobj,
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&dev->kobj, kobject_name(&dev->kobj)) < 0)
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BT_ERR("Failed to create class symlink");
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return 0;
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}
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void hci_unregister_sysfs(struct hci_dev *hdev)
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{
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BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
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sysfs_remove_link(&bt_class->subsys.kobj,
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kobject_name(&hdev->dev.kobj));
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device_del(&hdev->dev);
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}
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int __init bt_sysfs_init(void)
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{
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int err;
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bt_platform = platform_device_register_simple("bluetooth", -1, NULL, 0);
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if (IS_ERR(bt_platform))
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return PTR_ERR(bt_platform);
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err = bus_register(&bt_bus);
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if (err < 0) {
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platform_device_unregister(bt_platform);
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return err;
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}
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bt_class = class_create(THIS_MODULE, "bluetooth");
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if (IS_ERR(bt_class)) {
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bus_unregister(&bt_bus);
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platform_device_unregister(bt_platform);
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return PTR_ERR(bt_class);
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}
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return 0;
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}
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void bt_sysfs_cleanup(void)
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{
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class_destroy(bt_class);
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bus_unregister(&bt_bus);
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platform_device_unregister(bt_platform);
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}
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