[PATCH v3] Bluetooth: btusb: Add support for variant WCN6855 by using different nvm

From: tjiang@codeaurora.org
To: marcel@holtmann.org, johan.hedberg@gmail.com, luiz.dentz@gmail.com
Cc: linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, bgodavar@codeaurora.org,
	c-hbandi@codeaurora.org, hemantg@codeaurora.org,
	mka@chromium.org, rjliao@codeaurora.org, zijuhu@codeaurora.org,
	tjiang@codeaurora.org
Subject: [PATCH v3] Bluetooth: btusb: Add support for variant WCN6855 by using different nvm
Date: Fri, 22 Oct 2021 13:35:38 +0800	[thread overview]
Message-ID: <1d19afff955cdc8d47582297a26246d9@codeaurora.org> (raw)

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: Tim Jiang <tjiang@codeaurora.org>
---
  drivers/bluetooth/btusb.c | 55 
+++++++++++++++++++++++++++++++++++------------
  1 file changed, 41 insertions(+), 14 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 87b71740fad8..a5fe57e7cd7e 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3195,6 +3195,9 @@ 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;
@@ -3226,6 +3229,7 @@ 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,
@@ -3380,6 +3384,42 @@ 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,
+					const struct qca_version *ver)
+{
+	u32 rom_version = le32_to_cpu(ver->rom_version);
+	u16 flag = le16_to_cpu(ver->flag);
+
+	if (((flag >> 8) & 0xff) == QCA_FLAG_MULTI_NVM) {
+		u16 board_id = le16_to_cpu(ver->board_id);
+		u32 ram_version = le32_to_cpu(ver->ram_version);
+		const char *variant = NULL;
+
+		switch (ram_version) {
+		case WCN6855_2_0_RAM_VERSION_GF:
+		case WCN6855_2_1_RAM_VERSION_GF:
+			variant = "_gf";
+			break;
+		default:
+			variant = "";
+			break;
+		}
+
+		if (board_id == 0) {
+			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s.bin",
+				rom_version, variant);
+		} else {
+			snprintf(fwname, max_size, "qca/nvm_usb_%08x%s_%04x.bin",
+				rom_version, 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)
@@ -3388,20 +3428,7 @@ 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));
-	}
+	btusb_generate_qca_nvm_name(fwname, sizeof(fwname), ver);

  	err = request_firmware(&fw, fwname, &hdev->dev);
  	if (err) {
-- 
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