Bluetooth: hci_uart: Add protocol support for Broadcom UART devices
This adds the protocol support for Broadcom based UART devices to
enable firmware and patchram download procedure. It is a pretty
straight forward H:4 driver with the exception of actually having
its own setup and address configuration callbacks.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
index dd338fa..fe1905c 100644
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -28,4 +28,119 @@
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
+#include "btbcm.h"
#include "hci_uart.h"
+
+struct bcm_data {
+ struct sk_buff *rx_skb;
+ struct sk_buff_head txq;
+};
+
+static int bcm_open(struct hci_uart *hu)
+{
+ struct bcm_data *bcm;
+
+ BT_DBG("hu %p", hu);
+
+ bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
+ if (!bcm)
+ return -ENOMEM;
+
+ skb_queue_head_init(&bcm->txq);
+
+ hu->priv = bcm;
+ return 0;
+}
+
+static int bcm_close(struct hci_uart *hu)
+{
+ struct bcm_data *bcm = hu->priv;
+
+ BT_DBG("hu %p", hu);
+
+ skb_queue_purge(&bcm->txq);
+ kfree_skb(bcm->rx_skb);
+ kfree(bcm);
+
+ hu->priv = NULL;
+ return 0;
+}
+
+static int bcm_flush(struct hci_uart *hu)
+{
+ struct bcm_data *bcm = hu->priv;
+
+ BT_DBG("hu %p", hu);
+
+ skb_queue_purge(&bcm->txq);
+
+ return 0;
+}
+
+static int bcm_setup(struct hci_uart *hu)
+{
+ BT_DBG("hu %p", hu);
+
+ hu->hdev->set_bdaddr = btbcm_set_bdaddr;
+
+ return btbcm_setup_patchram(hu->hdev);
+}
+
+static int bcm_recv(struct hci_uart *hu, const void *data, int count)
+{
+ struct bcm_data *bcm = hu->priv;
+
+ if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
+ return -EUNATCH;
+
+ bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count);
+ if (IS_ERR(bcm->rx_skb)) {
+ int err = PTR_ERR(bcm->rx_skb);
+ BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
+ return err;
+ }
+
+ return count;
+}
+
+static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
+{
+ struct bcm_data *bcm = hu->priv;
+
+ BT_DBG("hu %p skb %p", hu, skb);
+
+ /* Prepend skb with frame type */
+ memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+ skb_queue_tail(&bcm->txq, skb);
+
+ return 0;
+}
+
+static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
+{
+ struct bcm_data *bcm = hu->priv;
+
+ return skb_dequeue(&bcm->txq);
+}
+
+static const struct hci_uart_proto bcm_proto = {
+ .id = HCI_UART_BCM,
+ .name = "BCM",
+ .open = bcm_open,
+ .close = bcm_close,
+ .flush = bcm_flush,
+ .setup = bcm_setup,
+ .recv = bcm_recv,
+ .enqueue = bcm_enqueue,
+ .dequeue = bcm_dequeue,
+};
+
+int __init bcm_init(void)
+{
+ return hci_uart_register_proto(&bcm_proto);
+}
+
+int __exit bcm_deinit(void)
+{
+ return hci_uart_unregister_proto(&bcm_proto);
+}