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From:   Rocky Liao <rjliao@codeaurora.org>
To:     marcel@holtmann.org, johan.hedberg@gmail.com
Cc:     linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org,
        Rocky Liao <rjliao@codeaurora.org>
Subject: [PATCH v1] Bluetooth: hci_qca: Add poweroff support during hci down for QCA Rome
Date:   Thu, 19 Dec 2019 12:03:34 +0800
Message-Id: <20191219040334.15355-1-rjliao@codeaurora.org>
Sender: linux-bluetooth-owner@vger.kernel.org
Precedence: bulk

This patch enables power off support for hci down and power on support
for hci up. As QCA Rome power sources are ignited by bt_en GPIO, we will
pull it down during hci down, i.e. an complete power off of QCA Rome.
So while hci up, will pull up the bt_en GPIO again to power on the chip,
requests BT chip version and download the firmware.

Signed-off-by: Rocky Liao <rjliao@codeaurora.org>
---
 drivers/bluetooth/hci_qca.c | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index b602ed01505b..1cb706acdef6 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1257,6 +1257,7 @@ static int qca_setup(struct hci_uart *hu)
 {
 	struct hci_dev *hdev = hu->hdev;
 	struct qca_data *qca = hu->priv;
+	struct qca_serdev *qcadev;
 	unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
 	enum qca_btsoc_type soc_type = qca_soc_type(hu);
 	const char *firmware_name = qca_get_firmware_name(hu);
@@ -1293,6 +1294,17 @@ static int qca_setup(struct hci_uart *hu)
 			return ret;
 	} else {
 		bt_dev_info(hdev, "ROME setup");
+		if (hu->serdev) {
+			/* Enable NON_PERSISTENT_SETUP QUIRK to ensure to
+			 * execute setup for every hci up.
+			 */
+			set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
+			qcadev = serdev_device_get_drvdata(hu->serdev);
+			hu->hdev->shutdown = qca_power_off;
+			gpiod_set_value_cansleep(qcadev->bt_en, 1);
+			/* Controller needs time to bootup. */
+			msleep(150);
+		}
 		qca_set_speed(hu, QCA_INIT_SPEED);
 	}
 
@@ -1413,13 +1425,27 @@ static void qca_power_shutdown(struct hci_uart *hu)
 static int qca_power_off(struct hci_dev *hdev)
 {
 	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct qca_serdev *qcadev;
+	enum qca_btsoc_type soc_type = qca_soc_type(hu);
 
-	/* Perform pre shutdown command */
-	qca_send_pre_shutdown_cmd(hdev);
+	if (qca_is_wcn399x(soc_type)) {
+		/* Perform pre shutdown command */
+		qca_send_pre_shutdown_cmd(hdev);
 
-	usleep_range(8000, 10000);
+		usleep_range(8000, 10000);
+
+		qca_power_shutdown(hu);
+	} else {
+		if (hu->serdev) {
+
+			qcadev = serdev_device_get_drvdata(hu->serdev);
+
+			gpiod_set_value_cansleep(qcadev->bt_en, 0);
+
+			usleep_range(8000, 10000);
+		}
+	}
 
-	qca_power_shutdown(hu);
 	return 0;
 }
 
-- 
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