linux-kernel - Re: [PATCH v1 3/3] Bluetooth: hci_qca: Add support for QTI bluetooth MAPLE

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Date:   Tue, 2 Nov 2021 15:53:33 +0800
From:   Zijun Hu <zijuhu@...eaurora.org>
To:     Greg KH <gregkh@...uxfoundation.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, bgodavar@...eaurora.org,
        c-hbandi@...eaurora.org, hemantg@...eaurora.org, mka@...omium.org,
        rjliao@...eaurora.org, Zijun Hu <quic_zijuhu@...cinc.com>
Subject: Re: [PATCH v1 3/3] Bluetooth: hci_qca: Add support for QTI bluetooth
 MAPLE



On 11/2/2021 3:35 PM, Greg KH wrote:
> On Tue, Nov 02, 2021 at 03:12:57PM +0800, Zijun Hu wrote:
>> From: Zijun Hu <quic_zijuhu@...cinc.com>
>>
>> Add support for MAPLE integrated within SOC, it is mounted on
>> a virtual tty port and powered on/off via relevant IOCTL, neither
>> IBS nor RAMPATCH downloading is not required.
>>
>> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
>> ---
>>  drivers/bluetooth/btqca.c   | 13 ++++++++++++-
>>  drivers/bluetooth/btqca.h   | 13 +++++++++++++
>>  drivers/bluetooth/hci_qca.c | 47 ++++++++++++++++++++++++++++++++++++++++++++-
>>  3 files changed, 71 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
>> index be04d74037d2..b83d2ecefe5d 100644
>> --- a/drivers/bluetooth/btqca.c
>> +++ b/drivers/bluetooth/btqca.c
>> @@ -255,6 +255,8 @@ static void qca_tlv_check_data(struct hci_dev *hdev,
>>  		BT_DBG("TLV Type\t\t : 0x%x", type_len & 0x000000ff);
>>  		BT_DBG("Length\t\t : %d bytes", length);
>>  
>> +		if (qca_is_maple(soc_type))
>> +			break;
>>  		idx = 0;
>>  		data = tlv->data;
>>  		while (idx < length) {
>> @@ -552,6 +554,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>>  	rom_ver = ((soc_ver & 0x00000f00) >> 0x04) | (soc_ver & 0x0000000f);
>>  
>>  	/* Download rampatch file */
>> +	if (qca_is_maple(soc_type))
>> +		goto download_nvm;
>> +
>>  	config.type = TLV_TYPE_PATCH;
>>  	if (qca_is_wcn399x(soc_type)) {
>>  		snprintf(config.fwname, sizeof(config.fwname),
>> @@ -580,6 +585,7 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>>  	/* Give the controller some time to get ready to receive the NVM */
>>  	msleep(10);
>>  
>> +download_nvm:
>>  	/* Download NVM configuration */
>>  	config.type = TLV_TYPE_NVM;
>>  	if (firmware_name)
>> @@ -597,6 +603,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>>  	else if (soc_type == QCA_QCA6390)
>>  		snprintf(config.fwname, sizeof(config.fwname),
>>  			 "qca/htnv%02x.bin", rom_ver);
>> +	else if (qca_is_maple(soc_type))
>> +		snprintf(config.fwname, sizeof(config.fwname),
>> +			 "qca/mpnv%02x.bin", rom_ver);
>>  	else if (soc_type == QCA_WCN6750)
>>  		snprintf(config.fwname, sizeof(config.fwname),
>>  			 "qca/msnv%02x.bin", rom_ver);
>> @@ -609,6 +618,8 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>>  		bt_dev_err(hdev, "QCA Failed to download NVM (%d)", err);
>>  		return err;
>>  	}
>> +	if (qca_is_maple(soc_type))
>> +		msleep(MAPLE_NVM_READY_DELAY_MS);
>>  
>>  	if (soc_type >= QCA_WCN3991) {
>>  		err = qca_disable_soc_logging(hdev);
>> @@ -637,7 +648,7 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>>  		return err;
>>  	}
>>  
>> -	if (soc_type == QCA_WCN3991 || soc_type == QCA_WCN6750) {
>> +	if (soc_type == QCA_WCN3991 || soc_type == QCA_WCN6750 || qca_is_maple(soc_type)) {
>>  		/* get fw build info */
>>  		err = qca_read_fw_build_info(hdev);
>>  		if (err < 0)
>> diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
>> index 30afa7703afd..0a5a7d1daa71 100644
>> --- a/drivers/bluetooth/btqca.h
>> +++ b/drivers/bluetooth/btqca.h
>> @@ -46,6 +46,8 @@
>>  
>>  #define QCA_FW_BUILD_VER_LEN		255
>>  
>> +#define MAPLE_NVM_READY_DELAY_MS        1500
>> +#define MAPLE_POWER_CONTROL_DELAY_MS    50
>>  
>>  enum qca_baudrate {
>>  	QCA_BAUDRATE_115200 	= 0,
>> @@ -145,6 +147,7 @@ enum qca_btsoc_type {
>>  	QCA_WCN3991,
>>  	QCA_QCA6390,
>>  	QCA_WCN6750,
>> +	QCA_MAPLE,
>>  };
>>  
>>  #if IS_ENABLED(CONFIG_BT_QCA)
>> @@ -167,6 +170,11 @@ static inline bool qca_is_wcn6750(enum qca_btsoc_type soc_type)
>>  	return soc_type == QCA_WCN6750;
>>  }
>>  
>> +static inline bool qca_is_maple(enum qca_btsoc_type soc_type)
>> +{
>> +	return soc_type == QCA_MAPLE;
>> +}
>> +
>>  #else
>>  
>>  static inline int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
>> @@ -204,6 +212,11 @@ static inline bool qca_is_wcn6750(enum qca_btsoc_type soc_type)
>>  	return false;
>>  }
>>  
>> +static inline bool qca_is_maple(enum qca_btsoc_type soc_type)
>> +{
>> +	return false;
>> +}
>> +
>>  static inline int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
>>  {
>>  	return -EOPNOTSUPP;
>> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
>> index dd768a8ed7cb..f1d9670719c4 100644
>> --- a/drivers/bluetooth/hci_qca.c
>> +++ b/drivers/bluetooth/hci_qca.c
>> @@ -70,6 +70,10 @@
>>  #define QCA_CRASHBYTE_PACKET_LEN	1096
>>  #define QCA_MEMDUMP_BYTE		0xFB
>>  
>> +#ifndef IOCTL_IPC_BOOT
>> +#define IOCTL_IPC_BOOT                  0xBE
>> +#endif
> 
> You send this command, but never use it.  Where is the driver code that
> uses this command?
> 
qca_maple_power_control() will use it.  this driver depends on bt_tty kernel module
https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-ipq-5.4/tree/drivers/soc/qcom/bt_tty.c?h=NHSS.QSDK.11.5.0.5.r2

> And why not tabs?
> 
> And why is this patch series not properly threaded so tools can pick it
> up and find them?
> 
> And why the odd named ioctl that is different from other ones in this
> file?
> 
that IOCTL name is defined by that module.
https://source.codeaurora.org/quic/qsdk/oss/kernel/linux-ipq-5.4/tree/include/linux/bt.h?h=NHSS.QSDK.11.5.0.5.r2

> And why not just use normal power management hooks for doing things like
> turning on and off the hardware like all other drivers?
> 
this device is special.

it seems BT maintainer decides to drop this patch.
so please ignore it.
thanks 
> thanks,
> 
> greg k-h
>