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Commit bdd8818e authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

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

drivers/bluetooth/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/bluetooth/hci_bcm.c

+115 −0
Original line number Diff line number Diff line
@@ -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);

}

drivers/bluetooth/hci_ldisc.c

+6 −0
Original line number Diff line number Diff line
@@ -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);

drivers/bluetooth/hci_uart.h

+5 −0
Original line number Diff line number Diff line
@@ -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