linux-kernel - Re: [PATCH v4] Bluetooth: hci_qca: Add qca_power_on() API to support both wcn399x and Rome power up

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Date:   Mon, 13 Jan 2020 11:53:25 +0800
From:   Rocky Liao <rjliao@...eaurora.org>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v4] Bluetooth: hci_qca: Add qca_power_on() API to support
 both wcn399x and Rome power up

在 2020-01-11 08:31，Matthias Kaehlcke 写道：
> Hi Rocky,
> 
> On Fri, Jan 10, 2020 at 11:32:14AM +0800, Rocky Liao wrote:
>> This patch adds a unified API qca_power_on() to support both wcn399x 
>> and
>> Rome power on. For wcn399x it calls the qca_wcn3990_init() to init the
>> regulators, and for Rome it pulls up the bt_en GPIO to power up the 
>> btsoc.
>> It also moves all the power up operation from hdev->open() to
>> hdev->setup().
>> 
>> Signed-off-by: Rocky Liao <rjliao@...eaurora.org>
>> Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
>> ---
>> 
>> Changes in v2: None
>> Changes in v3:
>>   -moved all the power up operation from open() to setup()
>>   -updated the commit message
>> Changes in v4:
>>   -made a single call to qca_power_on() in setup()
>> 
>> 
>>  drivers/bluetooth/hci_qca.c | 48 
>> +++++++++++++++++++++++--------------
>>  1 file changed, 30 insertions(+), 18 deletions(-)
>> 
>> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
>> index 82e4cd4b6663..6a67e5489b16 100644
>> --- a/drivers/bluetooth/hci_qca.c
>> +++ b/drivers/bluetooth/hci_qca.c
>> @@ -541,7 +541,6 @@ static int qca_open(struct hci_uart *hu)
>>  {
>>  	struct qca_serdev *qcadev;
>>  	struct qca_data *qca;
>> -	int ret;
>> 
>>  	BT_DBG("hu %p qca_open", hu);
>> 
>> @@ -582,23 +581,10 @@ static int qca_open(struct hci_uart *hu)
>>  	hu->priv = qca;
>> 
>>  	if (hu->serdev) {
>> -
>>  		qcadev = serdev_device_get_drvdata(hu->serdev);
>> -		if (!qca_is_wcn399x(qcadev->btsoc_type)) {
>> -			gpiod_set_value_cansleep(qcadev->bt_en, 1);
>> -			/* Controller needs time to bootup. */
>> -			msleep(150);
>> -		} else {
>> +		if (qca_is_wcn399x(qcadev->btsoc_type)) {
>>  			hu->init_speed = qcadev->init_speed;
>>  			hu->oper_speed = qcadev->oper_speed;
>> -			ret = qca_regulator_enable(qcadev);
>> -			if (ret) {
>> -				destroy_workqueue(qca->workqueue);
>> -				kfree_skb(qca->rx_skb);
>> -				hu->priv = NULL;
>> -				kfree(qca);
>> -				return ret;
>> -			}
>>  		}
>>  	}
>> 
>> @@ -1531,6 +1517,31 @@ static int qca_wcn3990_init(struct hci_uart 
>> *hu)
>>  	return 0;
>>  }
>> 
>> +static int qca_power_on(struct hci_dev *hdev)
>> +{
>> +	struct hci_uart *hu = hci_get_drvdata(hdev);
>> +	enum qca_btsoc_type soc_type = qca_soc_type(hu);
>> +	struct qca_serdev *qcadev;
>> +	int ret = 0;
>> +
>> +	/* Non-serdev device usually is powered by external power
>> +	 * and don't need additional action in driver for power on
>> +	 */
>> +	if (!hu->serdev)
>> +		return 0;
>> +
>> +	if (qca_is_wcn399x(soc_type)) {
>> +		ret = qca_wcn3990_init(hu);
>> +	} else {
>> +		qcadev = serdev_device_get_drvdata(hu->serdev);
>> +		gpiod_set_value_cansleep(qcadev->bt_en, 1);
>> +		/* Controller needs time to bootup. */
>> +		msleep(150);
>> +	}
>> +
>> +	return ret;
>> +}
>> +
>>  static int qca_setup(struct hci_uart *hu)
>>  {
>>  	struct hci_dev *hdev = hu->hdev;
>> @@ -1553,6 +1564,10 @@ static int qca_setup(struct hci_uart *hu)
>>  	 */
>>  	set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
>> 
>> +	ret = qca_power_on(hdev);
>> +	if (ret)
>> +		return ret;
>> +
> 
> Now if qca_power_on() fails there is no log entry indicating that 
> Bluetooth
> setup was running. That's why I suggested to put this log entry before
> the call, and remove the corresponding entries from the if/else 
> branches:
> 
> 	bt_dev_info(hdev, "setting up %s",
> 		qca_is_wcn399x(soc_type)? "wcn399x" : "ROME");
> 
Sorry I missed that and will update the patch soon.

>>  	if (qca_is_wcn399x(soc_type)) {
>>  		bt_dev_info(hdev, "setting up wcn3990");
>> 
>> @@ -1562,9 +1577,6 @@ static int qca_setup(struct hci_uart *hu)
>>  		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
>>  		set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
>>  		hu->hdev->shutdown = qca_power_off;
>> -		ret = qca_wcn3990_init(hu);
>> -		if (ret)
>> -			return ret;
>> 
>>  		ret = qca_read_soc_version(hdev, &soc_ver, soc_type);
>>  		if (ret)
>> --
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora 
>> Forum, a Linux Foundation Collaborative Project