linux-kernel - Re: [PATCH v1] Bluetooth: hci_qca: Add poweroff support during hci down for QCA Rome

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Date:   Wed, 25 Dec 2019 14:06:40 +0800
From:   rjliao@...eaurora.org
To:     marcel@...tmann.org, johan.hedberg@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org
Subject: Re: [PATCH v1] Bluetooth: hci_qca: Add poweroff support during hci
 down for QCA Rome

Please ingnore this patch, I have just sent the new set of patches.

在 2019-12-19 12:03，Rocky Liao 写道：
> 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@...eaurora.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;
>  }