linux-kernel - [PATCH v2] Bluetooth: btrtl: Add the support for RTL8761CUV

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Message-ID: <20251028062413.252504-1-max.chou@realtek.com>
Date: Tue, 28 Oct 2025 14:24:13 +0800
From: Max Chou <max.chou@...ltek.com>
To: Marcel Holtmann <marcel@...tmann.org>,
        Luiz Augusto von Dentz
	<luiz.dentz@...il.com>,
        <linux-bluetooth@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Hilda Wu <hildawu@...ltek.com>, alex_lu <alex_lu@...lsil.com.cn>,
        <niall_ni@...lsil.com.cn>, <zhu_qing@...lsil.com.cn>,
        Chih-Hsiang Wang
	<wangchihhs@...ltek.com>, <brenda.li@...nx.com>,
        Max Chou
	<max.chou@...ltek.com>
Subject: [PATCH v2] Bluetooth: btrtl: Add the support for RTL8761CUV

Add support for RTL8761CUV BT controller on the USB interface.
Do not apply IC_MATCH_FL_HCIVER when hci_ver is 0 in the ic_id_table.

The device info from /sys/kernel/debug/usb/devices as below.

T:  Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 13 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0bda ProdID=c761 Rev= 2.00
S:  Manufacturer=Realtek
S:  Product=Bluetooth Controller
S:  SerialNumber=10000
C:* #Ifs= 2 Cfg#= 1 Atr=a0 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=  64 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) 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

Signed-off-by: Max Chou <max.chou@...ltek.com>
---
Changes in V2:
- Do not apply IC_MATCH_FL_HCIVER when hci_ver is 0 in the ic_id_table.
---
 drivers/bluetooth/btrtl.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 6abd962502e3..29bd3cd28e39 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -72,6 +72,7 @@ enum btrtl_chip_id {
 	CHIP_ID_8851B = 36,
 	CHIP_ID_8922A = 44,
 	CHIP_ID_8852BT = 47,
+	CHIP_ID_8761C = 51,
 };
 
 struct id_table {
@@ -230,6 +231,14 @@ static const struct id_table ic_id_table[] = {
 	  .cfg_name = "rtl_bt/rtl8761bu_config",
 	  .hw_info  = "rtl8761bu" },
 
+	/* 8761CU */
+	{ IC_INFO(RTL_ROM_LMP_8761A, 0x0e, 0, HCI_USB),
+	  .config_needed = false,
+	  .has_rom_version = true,
+	  .fw_name  = "rtl_bt/rtl8761cu_fw",
+	  .cfg_name = "rtl_bt/rtl8761cu_config",
+	  .hw_info  = "rtl8761cu" },
+
 	/* 8822C with UART interface */
 	{ IC_INFO(RTL_ROM_LMP_8822B, 0xc, 0x8, HCI_UART),
 	  .config_needed = true,
@@ -344,7 +353,8 @@ static const struct id_table *btrtl_match_ic(u16 lmp_subver, u16 hci_rev,
 		    (ic_id_table[i].hci_rev != hci_rev))
 			continue;
 		if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIVER) &&
-		    (ic_id_table[i].hci_ver != hci_ver))
+		    (ic_id_table[i].hci_ver != hci_ver) &&
+		    (ic_id_table[i].hci_ver != 0))
 			continue;
 		if ((ic_id_table[i].match_flags & IC_MATCH_FL_HCIBUS) &&
 		    (ic_id_table[i].hci_bus != hci_bus))
@@ -668,6 +678,7 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev,
 		{ RTL_ROM_LMP_8851B, 36 },	/* 8851B */
 		{ RTL_ROM_LMP_8922A, 44 },	/* 8922A */
 		{ RTL_ROM_LMP_8852A, 47 },	/* 8852BT */
+		{ RTL_ROM_LMP_8761A, 51 },	/* 8761C */
 	};
 
 	if (btrtl_dev->fw_len <= 8)
@@ -1301,6 +1312,7 @@ void btrtl_set_quirks(struct hci_dev *hdev, struct btrtl_device_info *btrtl_dev)
 	case CHIP_ID_8851B:
 	case CHIP_ID_8922A:
 	case CHIP_ID_8852BT:
+	case CHIP_ID_8761C:
 		hci_set_quirk(hdev, HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED);
 
 		/* RTL8852C needs to transmit mSBC data continuously without
@@ -1520,6 +1532,8 @@ MODULE_FIRMWARE("rtl_bt/rtl8761b_fw.bin");
 MODULE_FIRMWARE("rtl_bt/rtl8761b_config.bin");
 MODULE_FIRMWARE("rtl_bt/rtl8761bu_fw.bin");
 MODULE_FIRMWARE("rtl_bt/rtl8761bu_config.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8761cu_fw.bin");
+MODULE_FIRMWARE("rtl_bt/rtl8761cu_config.bin");
 MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
 MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
 MODULE_FIRMWARE("rtl_bt/rtl8821c_fw.bin");
-- 
2.43.0