[PATCH v2] Bluetooth: btintel: Add support for downloading secondary boot loader image

[Kiran K <kiran.k@intel.com>]

Some variants of Intel controllers like BlazarI supports downloading of
secondary bootloader. This patch adds the support to download secondary
boot loader image before downloading operational firmware image.

dmesg logs:
[16.537130] Bluetooth: Core ver 2.22
[16.537135] Bluetooth: Starting self testing
[16.540021] Bluetooth: ECDH test passed in 2818 usecs
[16.560666] Bluetooth: SMP test passed in 602 usecs
[16.560674] Bluetooth: Finished self testing
[16.560690] Bluetooth: HCI device and connection manager initialized
[16.560695] Bluetooth: HCI socket layer initialized
[16.560697] Bluetooth: L2CAP socket layer initialized
[16.560700] Bluetooth: SCO socket layer initialized
[16.571934] Bluetooth: hci0: Device revision is 0
[16.571940] Bluetooth: hci0: Secure boot is disabled
[16.571941] Bluetooth: hci0: OTP lock is disabled
[16.571942] Bluetooth: hci0: API lock is enabled
[16.571943] Bluetooth: hci0: Debug lock is disabled
[16.571943] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[16.571945] Bluetooth: hci0: Bootloader timestamp 2022.46 buildtype 1 build 26590
[16.572189] Bluetooth: hci0: DSM reset method type: 0x00
[16.575002] Bluetooth: hci0: Found device firmware: intel/ibt-0090-0291-02.sfi
[16.575007] Bluetooth: hci0: Boot Address: 0x30099000
[16.575008] Bluetooth: hci0: Firmware Version: 200-10.24
[16.705698] Bluetooth: hci0: Waiting for firmware download to complete
[16.705927] Bluetooth: hci0: Firmware loaded in 127852 usecs
[16.705952] Bluetooth: hci0: Waiting for device to boot
[16.708519] Bluetooth: hci0: Device booted in 2522 usecs
[16.708538] Bluetooth: hci0: Malformed MSFT vendor event: 0x02
[16.710296] Bluetooth: hci0: No device address configured
[16.712483] Bluetooth: hci0: Found device firmware: intel/ibt-0090-0291.sfi
[16.712497] Bluetooth: hci0: Boot Address: 0x10000800
[16.712498] Bluetooth: hci0: Firmware Version: 211-10.24
[16.930834] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[16.930840] Bluetooth: BNEP filters: protocol multicast
[16.930844] Bluetooth: BNEP socket layer initialized
[18.494137] Bluetooth: hci0: Waiting for firmware download to complete
[18.494897] Bluetooth: hci0: Firmware loaded in 1740634 usecs
[18.494972] Bluetooth: hci0: Waiting for device to boot
[18.529089] Bluetooth: hci0: Device booted in 33371 usecs
[18.529121] Bluetooth: hci0: Malformed MSFT vendor event: 0x02
[18.529914] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-0090-0291.ddc
[18.532158] Bluetooth: hci0: Applying Intel DDC parameters completed
[18.532582] Bluetooth: hci0: Found Intel DDC parameters: intel/bdaddress.cfg
[18.534109] Bluetooth: hci0: Applying Intel DDC parameters completed
[18.537170] Bluetooth: hci0: Firmware timestamp 2024.9 buildtype 0 build 58067
[18.537177] Bluetooth: hci0: Firmware SHA1: 0x81abf1ea
[18.540985] Bluetooth: hci0: Fseq status: Success (0x00)
[18.540992] Bluetooth: hci0: Fseq executed: 00.00.00.00
[18.540993] Bluetooth: hci0: Fseq BT Top: 00.00.00.00
[18.631360] Bluetooth: MGMT ver 1.22
[18.673023] Bluetooth: RFCOMM TTY layer initialized
[18.673031] Bluetooth: RFCOMM socket layer initialized
[18.673039] Bluetooth: RFCOMM ver 1.11

Signed-off-by: Kiran K <kiran.k@intel.com>
---
 drivers/bluetooth/btintel.c | 38 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 6ba7f5d1b837..6fb65f5344e4 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -521,6 +521,9 @@ static int btintel_version_info_tlv(struct hci_dev *hdev,
 			    version->min_fw_build_nn, version->min_fw_build_cw,
 			    2000 + version->min_fw_build_yy);
 		break;
+	case 0x02:
+		variant = "IML";
+		break;
 	case 0x03:
 		variant = "Firmware";
 		break;
@@ -2194,10 +2197,26 @@ static void btintel_get_fw_name_tlv(const struct intel_version_tlv *ver,
 				    char *fw_name, size_t len,
 				    const char *suffix)
 {
+	const char *format;
 	/* The firmware file name for new generation controllers will be
 	 * ibt-<cnvi_top type+cnvi_top step>-<cnvr_top type+cnvr_top step>
 	 */
-	snprintf(fw_name, len, "intel/ibt-%04x-%04x.%s",
+	switch (INTEL_HW_VARIANT(ver->cnvi_bt)) {
+	/* Only Blazar(0x1e) product supports downloading of secondary boot
+	 * loader image
+	 */
+	case 0x1e:
+		if (ver->img_type == 1)
+			format = "intel/ibt-%04x-%04x-02.%s";
+		else
+			format = "intel/ibt-%04x-%04x.%s";
+		break;
+	default:
+			format = "intel/ibt-%04x-%04x.%s";
+		break;
+	}
+
+	snprintf(fw_name, len, format,
 		 INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvi_top),
 					  INTEL_CNVX_TOP_STEP(ver->cnvi_top)),
 		 INTEL_CNVX_TOP_PACK_SWAB(INTEL_CNVX_TOP_TYPE(ver->cnvr_top),
@@ -2607,6 +2626,23 @@ static int btintel_bootloader_setup_tlv(struct hci_dev *hdev,
 	if (err)
 		return err;
 
+	err = btintel_read_version_tlv(hdev, ver);
+	if (err)
+		return err;
+
+    /* If image type returned is 0x02, then controller supports secondary
+     * boot loader image
+     */
+	if (ver->img_type == 0x02) {
+		err = btintel_prepare_fw_download_tlv(hdev, ver, &boot_param);
+		if (err)
+			return err;
+
+		err = btintel_boot(hdev, boot_param);
+		if (err)
+			return err;
+	}
+
 	btintel_clear_flag(hdev, INTEL_BOOTLOADER);
 
 	btintel_get_fw_name_tlv(ver, ddcname, sizeof(ddcname), "ddc");
-- 
2.34.1