[PATCH v1] Bluetooth: btmtk: Add MT7928 support

[Pauli Virtanen]

Hi,

ti, 2026-06-16 kello 11:01 +0800, Chris Lu kirjoitti:
> Add support for MT7928 (device ID 0x7935) which requires additional
> firmware (CBMCU firmware) loading before Bluetooth firmware.
> 
> Implement two-phase CBMCU firmware download: Phase 1 loads
> section with type 0x5 containing global descriptor,
> section maps and signature data; Phase 2 loads remaining
> firmware sections. Add retry mechanism for concurrent download
> protection.
> 
> After CBMCU firmware loads successfully, the driver continues
> to load corresponding BT firmware based on device ID through
> fallthrough to case 0x7922/0x7925.
> 
> Signed-off-by: Chris Lu <chris.lu at mediatek.com>
> ---
[clip]
> diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h
> index c83c24897c95..6d3bf6b74a1d 100644
> --- a/drivers/bluetooth/btmtk.h
> +++ b/drivers/bluetooth/btmtk.h
> @@ -9,6 +9,8 @@
>  #define FIRMWARE_MT7961		"mediatek/BT_RAM_CODE_MT7961_1_2_hdr.bin"
>  #define FIRMWARE_MT7925		"mediatek/mt7925/BT_RAM_CODE_MT7925_1_1_hdr.bin"
>  #define FIRMWARE_MT7927		"mediatek/mt7927/BT_RAM_CODE_MT6639_2_1_hdr.bin"
> +#define FIRMWARE_MT7928		"mediatek/mt7928/BT_RAM_CODE_MT7935_1_1_hdr.bin"
> +#define FIRMWARE_MT7928_CBMCU	"mediatek/mt7928/CBMCU_CODE_MT7935_1_1.bin"

Are these firmware names correct? 

The above names for MT7928 say MT79**35** not MT7928?

>  
>  #define HCI_EV_WMT 0xe4
>  #define HCI_WMT_MAX_EVENT_SIZE		64
> @@ -54,6 +56,7 @@ enum {
>  	BTMTK_WMT_RST = 0x7,
>  	BTMTK_WMT_REGISTER = 0x8,
>  	BTMTK_WMT_SEMAPHORE = 0x17,
> +	BTMTK_WMT_CBMCU_DWNLD = 0x58,
>  };
>  
>  enum {

-- 
Pauli Virtanen