linux-kernel - [PATCH v4] Bluetooth: btusb: Add support using different nvm for variant WCN6855 controller

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Date:   Mon, 23 Aug 2021 16:58:20 +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 v4] Bluetooth: btusb: Add support using different nvm for variant WCN6855 controller

From: Tim Jiang <tjiang@...eaurora.org>

we have variant wcn6855 soc chip from different vendors, so we should
use different nvm file with suffix to distinguish them.

Signed-off-by: Tim Jiang <tjiang@...eaurora.org>
---
 drivers/bluetooth/btusb.c | 46 ++++++++++++++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 10 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 60d2fce59a71..9b4408307138 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3141,6 +3141,9 @@ 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;
@@ -3172,6 +3175,7 @@ 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,
@@ -3326,22 +3330,24 @@ static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
 	return err;
 }
 
-static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
-				    struct qca_version *ver,
-				    const struct qca_device_info *info)
+static void btusb_generate_qca_nvm_name(char **fwname,
+					int max_size,
+					struct qca_version *ver,
+					char *separator,
+					char *vendor)
 {
-	const struct firmware *fw;
-	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));
+			snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x%s%s.bin",
+				 le32_to_cpu(ver->rom_version),
+				 separator,
+				 vendor);
 		} else {
-			snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x_%04x.bin",
+			snprintf(fwname, sizeof(fwname), "qca/nvm_usb_%08x%s%s%04x.bin",
 				le32_to_cpu(ver->rom_version),
+				separator,
+				vendor,
 				le16_to_cpu(ver->board_id));
 		}
 	} else {
@@ -3349,6 +3355,26 @@ static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
 			 le32_to_cpu(ver->rom_version));
 	}
 
+}
+
+static int btusb_setup_qca_load_nvm(struct hci_dev *hdev,
+				    struct qca_version *ver,
+				    const struct qca_device_info *info)
+{
+	const struct firmware *fw;
+	char fwname[64];
+	int err;
+
+	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, NULL, NULL);
+		break;
+	}
+
 	err = request_firmware(&fw, fwname, &hdev->dev);
 	if (err) {
 		bt_dev_err(hdev, "failed to request NVM file: %s (%d)",
-- 
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