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

tjiang
2021-10-22T05:35:47Z

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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