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Date:   Wed, 15 May 2019 16:30:57 +0800
From:   Rocky Liao <rjliao@codeaurora.org>
To:     Balakrishna Godavarthi <bgodavar@codeaurora.org>
Cc:     robh+dt@kernel.org, mark.rutland@arm.com, marcel@holtmann.org,
        johan.hedberg@gmail.com, thierry.escande@linaro.org,
        netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, hemtang@codeaurora.org,
        linux-bluetooth-owner@vger.kernel.org
Subject: Re: [PATCH v4 1/2] Bluetooth: hci_qca: Load customized NVM based on
 the device property
In-Reply-To: <50debf59532279fa0d0bf7156b48831a@codeaurora.org>
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 <1557631148-5120-1-git-send-email-rjliao@codeaurora.org>
 <50debf59532279fa0d0bf7156b48831a@codeaurora.org>
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Hi Bala,

On 2019-05-15 13:32, Balakrishna Godavarthi wrote:
> Hi Rocky,
> 
> On 2019-05-12 08:49, Rocky Liao wrote:
>> QCA BTSOC NVM is a customized firmware file and different vendors may
>> want to have different BTSOC configuration (e.g. Configure SCO over 
>> PCM
>> or I2S, Setting Tx power, etc.) via this file. This patch will allow
>> vendors to download different NVM firmware file by reading a device
>> property "firmware-name".
>> 
>> Signed-off-by: Rocky Liao <rjliao@codeaurora.org>
>> ---
>> Changes in v4:
>>   * rebased the code base and merge with latest code
>> ---
>>  drivers/bluetooth/btqca.c   | 14 ++++++++++----
>>  drivers/bluetooth/btqca.h   |  6 ++++--
>>  drivers/bluetooth/hci_qca.c | 19 ++++++++++++++++++-
>>  3 files changed, 32 insertions(+), 7 deletions(-)
>> 
>> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
>> index cc12eec..0ea690a 100644
>> --- a/drivers/bluetooth/btqca.c
>> +++ b/drivers/bluetooth/btqca.c
>> @@ -332,7 +332,8 @@ int qca_set_bdaddr_rome(struct hci_dev *hdev,
>> const bdaddr_t *bdaddr)
>>  EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
>> 
>>  int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>> -		   enum qca_btsoc_type soc_type, u32 soc_ver)
>> +		   enum qca_btsoc_type soc_type, u32 soc_ver,
>> +		   const char *firmware_name)
>>  {
>>  	struct rome_config config;
>>  	int err;
>> @@ -368,9 +369,14 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t 
>> baudrate,
>>  	if (qca_is_wcn399x(soc_type))
>>  		snprintf(config.fwname, sizeof(config.fwname),
>>  			 "qca/crnv%02x.bin", rom_ver);
>> -	else
>> -		snprintf(config.fwname, sizeof(config.fwname),
>> -			 "qca/nvm_%08x.bin", soc_ver);
>> +	else {
>> +		if (firmware_name)
>> +			snprintf(config.fwname, sizeof(config.fwname),
>> +				 "qca/%s", firmware_name);
>> +		else
>> +			snprintf(config.fwname, sizeof(config.fwname),
>> +				 "qca/nvm_%08x.bin", soc_ver);
>> +	}
>> 
> [Bala]: Can you make this change  applicable to the wcn399x series
> chip sets too.
> 
>        something like this
> 
>        if (qca_is_wcn399x(soc_type) && !firmware_name)
>          snprintf(config.fwname, sizeof(config.fwname),
>               "qca/crnv%02x.bin", rom_ver);
>       elseif (firmware_name)
>          snprintf(config.fwname, sizeof(config.fwname),
>             "qca/%s", firmware_name);
>       else
>         snprintf(config.fwname, sizeof(config.fwname),
>               "qca/nvm_%08x.bin", soc_ver);
> 
> 
>>  	err = qca_download_firmware(hdev, &config);
>>  	if (err < 0) {
>> diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
>> index 4c4fe2b..8c037bb 100644
>> --- a/drivers/bluetooth/btqca.h
>> +++ b/drivers/bluetooth/btqca.h
>> @@ -140,7 +140,8 @@ enum qca_btsoc_type {
>> 
>>  int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t 
>> *bdaddr);
>>  int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>> -		   enum qca_btsoc_type soc_type, u32 soc_ver);
>> +		   enum qca_btsoc_type soc_type, u32 soc_ver,
>> +		   const char *firmware_name);
>>  int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version);
>>  int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);
>>  static inline bool qca_is_wcn399x(enum qca_btsoc_type soc_type)
>> @@ -155,7 +156,8 @@ static inline int qca_set_bdaddr_rome(struct
>> hci_dev *hdev, const bdaddr_t *bdad
>>  }
>> 
>>  static inline int qca_uart_setup(struct hci_dev *hdev, uint8_t 
>> baudrate,
>> -				 enum qca_btsoc_type soc_type, u32 soc_ver)
>> +				 enum qca_btsoc_type soc_type, u32 soc_ver,
>> +				 const char *firmware_name)
>>  {
>>  	return -EOPNOTSUPP;
>>  }
>> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
>> index 57322c4..9590602 100644
>> --- a/drivers/bluetooth/hci_qca.c
>> +++ b/drivers/bluetooth/hci_qca.c
>> @@ -169,6 +169,7 @@ struct qca_serdev {
>>  	struct qca_power *bt_power;
>>  	u32 init_speed;
>>  	u32 oper_speed;
>> +	const char *firmware_name;
>>  };
>> 
>>  static int qca_power_setup(struct hci_uart *hu, bool on);
>> @@ -190,6 +191,17 @@ static enum qca_btsoc_type qca_soc_type(struct
>> hci_uart *hu)
>>  	return soc_type;
>>  }
>> 
>> +static const char *qca_get_firmware_name(struct hci_uart *hu)
>> +{
>> +	if (hu->serdev) {
>> +		struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
>> +
>> +		return qsd->firmware_name;
>> +	} else {
>> +		return NULL;
>> +	}
>> +}
>> +
>>  static void __serial_clock_on(struct tty_struct *tty)
>>  {
>>  	/* TODO: Some chipset requires to enable UART clock on client
>> @@ -1195,6 +1207,7 @@ static int qca_setup(struct hci_uart *hu)
>>  	struct qca_data *qca = hu->priv;
>>  	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);
>>  	int ret;
>>  	int soc_ver = 0;
>> 
>> @@ -1245,7 +1258,8 @@ static int qca_setup(struct hci_uart *hu)
>> 
>>  	bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
>>  	/* Setup patch / NVM configurations */
>> -	ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver);
>> +	ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver,
>> +			firmware_name);
>>  	if (!ret) {
>>  		set_bit(QCA_IBS_ENABLED, &qca->flags);
>>  		qca_debugfs_init(hdev);
>> @@ -1477,6 +1491,9 @@ static int qca_serdev_probe(struct serdev_device 
>> *serdev)
>>  			return PTR_ERR(qcadev->bt_en);
>>  		}
>> 
>> +		device_property_read_string(&serdev->dev, "firmware-name",
>> +					 &qcadev->firmware_name);
>> +
>>  		qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
>>  		if (IS_ERR(qcadev->susclk)) {
>>  			dev_err(&serdev->dev, "failed to acquire clk\n");

OK, will make the change and send out the updated version soon.

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