linux-kernel - Re: [PATCH v2] Bluetooth: btusb: add support for Qualcomm WCN785x

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Date:   Tue, 26 Apr 2022 12:06:56 +0800
From:   quic_zijuhu <quic_zijuhu@...cinc.com>
To:     Marcel Holtmann <marcel@...tmann.org>
CC:     Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        <linux-kernel@...r.kernel.org>, <linux-bluetooth@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2] Bluetooth: btusb: add support for Qualcomm WCN785x

On 4/22/2022 5:16 PM, Marcel Holtmann wrote:
> Hi Zijun,
> 
>> Qualcomm WCN785x has PID/VID 0cf3/e700 as shown by
>> /sys/kernel/debug/usb/devices:
>>
>> T:  Bus=02 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#=  8 Spd=12   MxCh= 0
>> D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
>> P:  Vendor=0cf3 ProdID=e700 Rev= 0.01
>> C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
>> I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
>> E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>> E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>> I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
>> I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
>> I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
>> I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
>> I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
>> I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
>> I:  If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=  63 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=  63 Ivl=1ms
>> I:  If#= 1 Alt= 7 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
>> E:  Ad=83(I) Atr=01(Isoc) MxPS=  65 Ivl=1ms
>> E:  Ad=03(O) Atr=01(Isoc) MxPS=  65 Ivl=1ms
>>
>> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
>> ---
>> drivers/bluetooth/btusb.c | 10 ++++++++--
>> 1 file changed, 8 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
>> index 06a854a2507e..67a6a84a6f61 100644
>> --- a/drivers/bluetooth/btusb.c
>> +++ b/drivers/bluetooth/btusb.c
>> @@ -317,6 +317,11 @@ static const struct usb_device_id blacklist_table[] = {
>> 						     BTUSB_WIDEBAND_SPEECH |
>> 						     BTUSB_VALID_LE_STATES },
>>
>> +	/* QCA WCN785x chipset */
>> +	{ USB_DEVICE(0x0cf3, 0xe700), .driver_info = BTUSB_QCA_WCN6855 |
>> +						     BTUSB_WIDEBAND_SPEECH |
>> +						     BTUSB_VALID_LE_STATES },
>> +
>> 	/* Broadcom BCM2035 */
>> 	{ USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
>> 	{ USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
>> @@ -3037,6 +3042,7 @@ static const struct qca_device_info qca_devices_table[] = {
>> 	{ 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
>> 	{ 0x00130200, 40, 4, 16 }, /* WCN6855 2.0 */
>> 	{ 0x00130201, 40, 4, 16 }, /* WCN6855 2.1 */
>> +	{ 0x00190200, 40, 4, 16 }, /* WCN785x 2.0 */
>> };
>>
>> static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
>> @@ -3327,11 +3333,11 @@ static int btusb_setup_qca(struct hci_dev *hdev)
>> 		if (err < 0)
>> 			return err;
>>
>> -		/* WCN6855 2.1 will reset to apply firmware downloaded here, so
>> +		/* WCN6855 2.1 and later will reset to apply firmware downloaded here, so
>> 		 * wait ~100ms for reset Done then go ahead, otherwise, it maybe
>> 		 * cause potential enable failure.
>> 		 */
>> -		if (info->rom_version == 0x00130201)
>> +		if ((info->rom_version == 0x00130201) || (info->rom_version == 0x00190200))
>> 			msleep(QCA_BT_RESET_WAIT_MS);
> 
> I think it is better to start using a switch statement here.
> 
i have changed this condition as (info->rom_version >= 0x00130201) within v3 patch and mailed it.
> Regards
> 
> Marcel
>