Commit bdd8818e authored by Marcel Holtmann's avatar Marcel Holtmann

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: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent 6ae4fddf
......@@ -122,6 +122,7 @@ config BT_HCIUART_INTEL
config BT_HCIUART_BCM
bool "Broadcom protocol support"
depends on BT_HCIUART
select BT_HCIUART_H4
select BT_BCM
help
The Broadcom protocol support enables Bluetooth HCI over serial
......
......@@ -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);
}
......@@ -679,6 +679,9 @@ static int __init hci_uart_init(void)
#ifdef CONFIG_BT_HCIUART_3WIRE
h5_init();
#endif
#ifdef CONFIG_BT_HCIUART_BCM
bcm_init();
#endif
return 0;
}
......@@ -702,6 +705,9 @@ static void __exit hci_uart_exit(void)
#ifdef CONFIG_BT_HCIUART_3WIRE
h5_deinit();
#endif
#ifdef CONFIG_BT_HCIUART_BCM
bcm_deinit();
#endif
/* Release tty registration of line discipline */
err = tty_unregister_ldisc(N_HCI);
......
......@@ -128,3 +128,8 @@ int h5_deinit(void);
#ifdef CONFIG_BT_HCIUART_INTEL
int intel_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);
#endif
#ifdef CONFIG_BT_HCIUART_BCM
int bcm_init(void);
int bcm_deinit(void);
#endif
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