From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
This patch adds the initial skeleton for Three-wire UART (H5) support
and hooks it up to the HCI UART framework.
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
---
drivers/bluetooth/Kconfig | 12 ++++++
drivers/bluetooth/Makefile | 1 +
drivers/bluetooth/hci_h5.c | 88 +++++++++++++++++++++++++++++++++++++++++
drivers/bluetooth/hci_ldisc.c | 6 +++
drivers/bluetooth/hci_uart.h | 5 +++
5 files changed, 112 insertions(+)
create mode 100644 drivers/bluetooth/hci_h5.c
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 5ccf142..e9f203e 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -81,6 +81,18 @@ config BT_HCIUART_LL
Say Y here to compile support for HCILL protocol.
+config BT_HCIUART_3WIRE
+ bool "Three-wire UART (H5) protocol support"
+ depends on BT_HCIUART
+ help
+ The HCI Three-wire UART Transport Layer makes it possible to
+ user the Bluetooth HCI over a serial port interface. The HCI
+ Three-wire UART Transport Layer assumes that the UART
+ communication may have bit errors, overrun errors or burst
+ errors and thereby making CTS/RTS lines unnecessary.
+
+ Say Y here to compile support for Three-wire UART protocol.
+
config BT_HCIBCM203X
tristate "HCI BCM203x USB driver"
depends on USB
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index f4460f4..4afae20 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -28,4 +28,5 @@ hci_uart-$(CONFIG_BT_HCIUART_H4) += hci_h4.o
hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o
hci_uart-$(CONFIG_BT_HCIUART_LL) += hci_ll.o
hci_uart-$(CONFIG_BT_HCIUART_ATH3K) += hci_ath.o
+hci_uart-$(CONFIG_BT_HCIUART_3WIRE) += hci_h5.o
hci_uart-objs := $(hci_uart-y)
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
new file mode 100644
index 0000000..6353d00
--- /dev/null
+++ b/drivers/bluetooth/hci_h5.c
@@ -0,0 +1,88 @@
+/*
+ *
+ * Bluetooth HCI Three-wire UART driver
+ *
+ * Copyright (C) 2012 Intel Corporation
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "hci_uart.h"
+
+static int h5_open(struct hci_uart *hu)
+{
+ return -ENOSYS;
+}
+
+static int h5_close(struct hci_uart *hu)
+{
+ return -ENOSYS;
+}
+
+static int h5_recv(struct hci_uart *hu, void *data, int count)
+{
+ return -ENOSYS;
+}
+
+static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb)
+{
+ return -ENOSYS;
+}
+
+static struct sk_buff *h5_dequeue(struct hci_uart *hu)
+{
+ return NULL;
+}
+
+static int h5_flush(struct hci_uart *hu)
+{
+ return -ENOSYS;
+}
+
+static struct hci_uart_proto h5p = {
+ .id = HCI_UART_3WIRE,
+ .open = h5_open,
+ .close = h5_close,
+ .recv = h5_recv,
+ .enqueue = h5_enqueue,
+ .dequeue = h5_dequeue,
+ .flush = h5_flush,
+};
+
+int __init h5_init(void)
+{
+ int err = hci_uart_register_proto(&h5p);
+
+ if (!err)
+ BT_INFO("HCI Three-wire UART (H5) protocol initialized");
+ else
+ BT_ERR("HCI Three-wire UART (H5) protocol init failed");
+
+ return err;
+}
+
+int __exit h5_deinit(void)
+{
+ return hci_uart_unregister_proto(&h5p);
+}
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 2f9b796..142f49c 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -558,6 +558,9 @@ static int __init hci_uart_init(void)
#ifdef CONFIG_BT_HCIUART_ATH3K
ath_init();
#endif
+#ifdef CONFIG_BT_HCIUART_3WIRE
+ h5_init();
+#endif
return 0;
}
@@ -578,6 +581,9 @@ static void __exit hci_uart_exit(void)
#ifdef CONFIG_BT_HCIUART_ATH3K
ath_deinit();
#endif
+#ifdef CONFIG_BT_HCIUART_3WIRE
+ h5_deinit();
+#endif
/* Release tty registration of line discipline */
if ((err = tty_unregister_ldisc(N_HCI)))
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index 6cf6ab22..aaf9d7d 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -104,3 +104,8 @@ int ll_deinit(void);
int ath_init(void);
int ath_deinit(void);
#endif
+
+#ifdef CONFIG_BT_HCIUART_3WIRE
+int h5_init(void);
+int h5_deinit(void);
+#endif
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
