Bluetooth: hciuart: Add support QCA chipset for UART

QCA61x4 chips have supported sleep feature using In-Band-Sleep commands
to enable sleep feature based on H4 protocol. After sending
patch/nvm configuration is done, IBS mode will be up and running
Signed-off-by: Ben Young Tae Kim <ytkim@qca.qualcomm.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/Kconfig

@@ -155,6 +155,19 @@ config BT_HCIUART_BCM
 
 	  Say Y here to compile support for Broadcom protocol.
 
+config BT_HCIUART_QCA
+	bool "Qualcomm Atheros protocol support"
+	depends on BT_HCIUART
+	select BT_HCIUART_H4
+	select BT_QCA
+	help
+	  The Qualcomm Atheros protocol supports HCI In-Band Sleep feature
+	  over serial port interface(H4) between controller and host.
+	  This protocol is required for UART clock control for QCA Bluetooth
+	  devices.
+
+	  Say Y here to compile support for QCA protocol.
+
 config BT_HCIBCM203X
 	tristate "HCI BCM203x USB driver"
 	depends on USB

drivers/bluetooth/Makefile

@@ -35,6 +35,7 @@ hci_uart-$(CONFIG_BT_HCIUART_ATH3K)	+= hci_ath.o
 hci_uart-$(CONFIG_BT_HCIUART_3WIRE)	+= hci_h5.o
 hci_uart-$(CONFIG_BT_HCIUART_INTEL)	+= hci_intel.o
 hci_uart-$(CONFIG_BT_HCIUART_BCM)	+= hci_bcm.o
+hci_uart-$(CONFIG_BT_HCIUART_QCA)	+= hci_qca.o
 hci_uart-objs				:= $(hci_uart-y)
 
 ccflags-y += -D__CHECK_ENDIAN__

drivers/bluetooth/hci_ldisc.c

@@ -810,6 +810,9 @@ static int __init hci_uart_init(void)
 #ifdef CONFIG_BT_HCIUART_BCM
 	bcm_init();
 #endif
+#ifdef CONFIG_BT_HCIUART_QCA
+	qca_init();
+#endif
 
 	return 0;
 }
@@ -839,6 +842,9 @@ static void __exit hci_uart_exit(void)
 #ifdef CONFIG_BT_HCIUART_BCM
 	bcm_deinit();
 #endif
+#ifdef CONFIG_BT_HCIUART_QCA
+	qca_deinit();
+#endif
 
 	/* Release tty registration of line discipline */
 	err = tty_unregister_ldisc(N_HCI);

drivers/bluetooth/hci_uart.h

@@ -35,7 +35,7 @@
 #define HCIUARTGETFLAGS		_IOR('U', 204, int)
 
 /* UART protocols */
-#define HCI_UART_MAX_PROTO	8
+#define HCI_UART_MAX_PROTO	9
 
 #define HCI_UART_H4	0
 #define HCI_UART_BCSP	1
@@ -45,6 +45,7 @@
 #define HCI_UART_ATH3K	5
 #define HCI_UART_INTEL	6
 #define HCI_UART_BCM	7
+#define HCI_UART_QCA	8
 
 #define HCI_UART_RAW_DEVICE	0
 #define HCI_UART_RESET_ON_INIT	1
@@ -176,3 +177,8 @@ int intel_deinit(void);
 int bcm_init(void);
 int bcm_deinit(void);
 #endif
+
+#ifdef CONFIG_BT_HCIUART_QCA
+int qca_init(void);
+int qca_deinit(void);
+#endif