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From: Zijun Hu <quic_zijuhu@quicinc.com>
To: <luiz.dentz@gmail.com>, <marcel@holtmann.org>
CC: <linux-bluetooth@vger.kernel.org>, Zijun Hu <quic_zijuhu@quicinc.com>
Subject: [PATCH v1 1/2] Bluetooth: hci_ldisc: Add a ioctl HCIUARTSETPROTODATA
Date: Wed, 20 Mar 2024 14:08:26 +0800
Message-ID: <1710914907-30012-2-git-send-email-quic_zijuhu@quicinc.com>
In-Reply-To: <1710914907-30012-1-git-send-email-quic_zijuhu@quicinc.com>
References: <1710914907-30012-1-git-send-email-quic_zijuhu@quicinc.com>
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HCIUARTSETPROTODATA is introduced to specify protocol specific settings
prior to HCIUARTSETPROTO, for protocal QCA, it is used by tool btattch
to specify soc_type.

Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
---
 drivers/bluetooth/hci_ldisc.c | 10 ++++++++++
 drivers/bluetooth/hci_uart.h  |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index a26367e9fb19..4be09c61bae5 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -506,6 +506,7 @@ static int hci_uart_tty_open(struct tty_struct *tty)
 	/* disable alignment support by default */
 	hu->alignment = 1;
 	hu->padding = 0;
+	hu->proto_data = 0;
 
 	INIT_WORK(&hu->init_ready, hci_uart_init_work);
 	INIT_WORK(&hu->write_work, hci_uart_write_work);
@@ -795,6 +796,15 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
 		err = hu->hdev_flags;
 		break;
 
+	case HCIUARTSETPROTODATA:
+		if (test_bit(HCI_UART_PROTO_SET, &hu->flags)) {
+			err = -EBUSY;
+		} else {
+			hu->proto_data = arg;
+			BT_DBG("HCIUARTSETPROTODATA %lu okay.", arg);
+		}
+		break;
+
 	default:
 		err = n_tty_ioctl_helper(tty, cmd, arg);
 		break;
diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
index 68c8c7e95d64..fc35e9bd4398 100644
--- a/drivers/bluetooth/hci_uart.h
+++ b/drivers/bluetooth/hci_uart.h
@@ -18,6 +18,8 @@
 #define HCIUARTGETDEVICE	_IOR('U', 202, int)
 #define HCIUARTSETFLAGS		_IOW('U', 203, int)
 #define HCIUARTGETFLAGS		_IOR('U', 204, int)
+/* Used prior to HCIUARTSETPROTO */
+#define HCIUARTSETPROTODATA	_IOW('U', 205, unsigned long)
 
 /* UART protocols */
 #define HCI_UART_MAX_PROTO	12
@@ -71,6 +73,7 @@ struct hci_uart {
 	struct work_struct	init_ready;
 	struct work_struct	write_work;
 
+	unsigned long proto_data;
 	const struct hci_uart_proto *proto;
 	struct percpu_rw_semaphore proto_lock;	/* Stop work for proto close */
 	void			*priv;
-- 
2.7.4