linux-kernel - Re: [PATCH v3] Bluetooth: btusb: Add support for variant WCN6855 by using different nvm

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Message-ID: <fe118b60df5881b0e9938f57aae6f87e@codeaurora.org>
Date:   Wed, 27 Oct 2021 14:12:07 +0800
From:   tjiang@...eaurora.org
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...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,
        rjliao@...eaurora.org, zijuhu@...eaurora.org
Subject: Re: [PATCH v3] Bluetooth: btusb: Add support for variant WCN6855 by
 using different nvm

Hi Matthias:
   the previous patch is submitted by zijun , as he is not working on 
this project, I take over his job, so can we assume abandon the previous 
patch, using my new patch ? thank you.
regards.
tim

On 2021-10-27 00:24, Matthias Kaehlcke wrote:
> On Fri, Oct 22, 2021 at 01:35:38PM +0800, tjiang@...eaurora.org wrote:
>> the RF performance of wcn6855 soc chip from different foundries will 
>> be
>> difference, so we should use different nvm to configure them.
>> 
>> Signed-off-by: Tim Jiang <tjiang@...eaurora.org>
>> ---
>>  drivers/bluetooth/btusb.c | 55
>> +++++++++++++++++++++++++++++++++++------------
>>  1 file changed, 41 insertions(+), 14 deletions(-)
>> 
>> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
>> index 87b71740fad8..a5fe57e7cd7e 100644
>> --- a/drivers/bluetooth/btusb.c
>> +++ b/drivers/bluetooth/btusb.c
>> @@ -3195,6 +3195,9 @@ static int btusb_set_bdaddr_wcn6855(struct 
>> hci_dev
>> *hdev,
>>  #define QCA_DFU_TIMEOUT		3000
>>  #define QCA_FLAG_MULTI_NVM      0x80
>> 
>> +#define WCN6855_2_0_RAM_VERSION_GF 0x400c1200
>> +#define WCN6855_2_1_RAM_VERSION_GF 0x400c1211
>> +
>>  struct qca_version {
>>  	__le32	rom_version;
>>  	__le32	patch_version;
>> @@ -3226,6 +3229,7 @@ static const struct qca_device_info
>> qca_devices_table[] = {
>>  	{ 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
>>  	{ 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
>>  	{ 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
>> +	{ 0x00130201, 40, 4, 16 }, /* WCN6855 2.1 */
>>  };
>> 
>>  static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 
>> request,
>> @@ -3380,6 +3384,42 @@ static int btusb_setup_qca_load_rampatch(struct
>> hci_dev *hdev,
>>  	return err;
>>  }
>> 
>> +static void btusb_generate_qca_nvm_name(char *fwname,
>> +					size_t max_size,
>> +					const struct qca_version *ver)
>> +{
>> +	u32 rom_version = le32_to_cpu(ver->rom_version);
>> +	u16 flag = le16_to_cpu(ver->flag);
>> +
>> +	if (((flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
>> +		u16 board_id = le16_to_cpu(ver->board_id);
>> +		u32 ram_version = le32_to_cpu(ver->ram_version);
>> +		const char *variant = NULL;
> 
> This assignement was introduced in v3, it isn't really useful since the
> variable is always assigned to a value in the switch statement below.
> 
> btw, why did you reset the patch version numbers, earlier they went up
> to v11? This is confusing, e.g. when someone mentions v3 of this patch,
> are they referring to this version or to
> https://patchwork.kernel.org/project/bluetooth/patch/1628758216-3201-1-git-send-email-zijuhu@codeaurora.org/?
> 
>> +
>> +		switch (ram_version) {
>> +		case WCN6855_2_0_RAM_VERSION_GF:
>> +		case WCN6855_2_1_RAM_VERSION_GF:
>> +			variant = "_gf";
>> +			break;
>> +		default:
>> +			variant = "";
>> +			break;
>> +		}
>> +
>> +		if (board_id == 0) {
>> +			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s.bin",
>> +				rom_version, variant);
>> +		} else {
>> +			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s_%04x.bin",
>> +				rom_version, variant, board_id);
>> +		}
>> +	} else {
>> +		snprintf(fwname, max_size, "qca/nvm_usb_%08x.bin",
>> +			rom_version);
>> +	}
>> +
>> +}
>> +
>>  static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
>>  				    struct qca_version *ver,
>>  				    const struct qca_device_info *info)
>> @@ -3388,20 +3428,7 @@ static int btusb_setup_qca_load_nvm(struct 
>> hci_dev
>> *hdev,
>>  	char fwname[64];
>>  	int err;
>> 
>> -	if (((ver->flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
>> -		/* if boardid equal 0, use default nvm without surfix */
>> -		if (le16_to_cpu(ver->board_id) == 0x0) {
>> -			snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
>> -				 le32_to_cpu(ver->rom_version));
>> -		} else {
>> -			snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x_%04x.bin",
>> -				le32_to_cpu(ver->rom_version),
>> -				le16_to_cpu(ver->board_id));
>> -		}
>> -	} else {
>> -		snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x.bin",
>> -			 le32_to_cpu(ver->rom_version));
>> -	}
>> +	btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver);
>> 
>>  	err = request_firmware(&fw, fwname, &hdev->dev);
>>  	if (err) {
>> --
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora 
>> Forum, a
>> Linux Foundation Collaborative Project