linux-kernel - [PATCH v10] Bluetooth: btusb: Add support using different nvm for variant WCN6855 controller

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Date:   Tue, 14 Sep 2021 18:08:16 +0800
From:   Zijun Hu <zijuhu@...eaurora.org>
To:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com
Cc:     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, zijuhu@...eaurora.org, tjiang@...eaurora.org
Subject: [PATCH v10] Bluetooth: btusb: Add support using different nvm for variant WCN6855 controller

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: Zijun Hu <zijuhu@...eaurora.org>
---
 drivers/bluetooth/btusb.c | 50 +++++++++++++++++++++++++++++++++++------------
 1 file changed, 37 insertions(+), 13 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 928cbfa4c42d..6dc645698e30 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3161,6 +3161,9 @@ 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;
@@ -3192,6 +3195,7 @@ 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,
@@ -3346,6 +3350,31 @@ 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,
+					struct qca_version *ver,
+					char *variant)
+{
+	char *sep = (strlen(variant) == 0) ? "" : "_";
+	u16 board_id = le16_to_cpu(ver->board_id);
+	u32 rom_version = le32_to_cpu(ver->rom_version);
+
+	if (((ver->flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
+		/* if boardid equal 0, use default nvm without suffix */
+		if (board_id == 0x0) {
+			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s%s.bin",
+				rom_version, sep, variant);
+		} else {
+			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s%s_%04x.bin",
+				rom_version, sep, 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)
@@ -3354,19 +3383,14 @@ 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));
+	switch (ver->ram_version) {
+	case WCN6855_2_0_RAM_VERSION_GF:
+	case WCN6855_2_1_RAM_VERSION_GF:
+		btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver, "gf");
+		break;
+	default:
+		btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver, "");
+		break;
 	}
 
 	err = request_firmware(&fw, fwname, &hdev->dev);
-- 
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