From:   Tedd Ho-Jeong An <hj.tedd.an@gmail.com>
To:     linux-bluetooth@vger.kernel.org
Cc:     Tedd Ho-Jeong An <tedd.an@intel.com>
Subject: [RFC PATCH] Bluetooth: btintel: Fix broken LED quirk for legacy ROM device
Date:   Wed, 15 Dec 2021 19:34:53 -0800
Message-Id: <20211216033453.9806-1-hj.tedd.an@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
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From: Tedd Ho-Jeong An <tedd.an@intel.com>

This patch fix the broken LED quirk for Intel legacy ROM devices.
Legacy device sends the SW RFKILL while shutting down the device (like
HCI interface down) to turn off the LED by putting the device in assert.

Once the SW RFKILL is on, it needs the HCI_Reset to exit from the SW
RFKILL state. This patch checks the quirk and send the HCI_Reset before
sending the HCI_Intel_Read_Version command.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@intel.com>
---
 drivers/bluetooth/btintel.c | 13 ++++++-------
 drivers/bluetooth/btusb.c   | 10 ++++++++--
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 8f9109b40961..0a5aa637bf6f 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -2355,8 +2355,13 @@ static int btintel_setup_combined(struct hci_dev *hdev)
 	 * As a workaround, send HCI Reset command first which will reset the
 	 * number of completed commands and allow normal command processing
 	 * from now on.
+	 *
+	 * For INTEL_BROKEN_LED, these devices have an issue with LED which
+	 * doesn't go off immediately during shutdown. Set the flag
+	 * here to send the LED OFF command during shutdown.
 	 */
-	if (btintel_test_flag(hdev, INTEL_BROKEN_INITIAL_NCMD)) {
+	if (btintel_test_flag(hdev, INTEL_BROKEN_INITIAL_NCMD) ||
+				btintel_test_flag(hdev, INTEL_BROKEN_LED)) {
 		skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
 				     HCI_INIT_TIMEOUT);
 		if (IS_ERR(skb)) {
@@ -2428,12 +2433,6 @@ static int btintel_setup_combined(struct hci_dev *hdev)
 				set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED,
 					&hdev->quirks);
 
-			/* These devices have an issue with LED which doesn't
-			 * go off immediately during shutdown. Set the flag
-			 * here to send the LED OFF command during shutdown.
-			 */
-			btintel_set_flag(hdev, INTEL_BROKEN_LED);
-
 			err = btintel_legacy_rom_setup(hdev, &ver);
 			break;
 		case 0x0b:      /* SfP */
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index d1bd9ee0a6ab..c6a070d5284f 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -60,6 +60,7 @@ static struct usb_driver btusb_driver;
 #define BTUSB_WIDEBAND_SPEECH	0x400000
 #define BTUSB_VALID_LE_STATES   0x800000
 #define BTUSB_QCA_WCN6855	0x1000000
+#define BTUSB_INTEL_BROKEN_LED	0x2000000
 #define BTUSB_INTEL_BROKEN_INITIAL_NCMD 0x4000000
 
 static const struct usb_device_id btusb_table[] = {
@@ -382,9 +383,11 @@ static const struct usb_device_id blacklist_table[] = {
 	{ USB_DEVICE(0x8087, 0x07da), .driver_info = BTUSB_CSR },
 	{ USB_DEVICE(0x8087, 0x07dc), .driver_info = BTUSB_INTEL_COMBINED |
 						     BTUSB_INTEL_BROKEN_INITIAL_NCMD },
-	{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED },
+	{ USB_DEVICE(0x8087, 0x0a2a), .driver_info = BTUSB_INTEL_COMBINED |
+						     BTUSB_INTEL_BROKEN_LED },
 	{ USB_DEVICE(0x8087, 0x0a2b), .driver_info = BTUSB_INTEL_COMBINED },
-	{ USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED },
+	{ USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL_COMBINED |
+						     BTUSB_INTEL_BROKEN_LED },
 	{ USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_COMBINED },
 
 	/* Other Intel Bluetooth devices */
@@ -3724,6 +3727,9 @@ static int btusb_probe(struct usb_interface *intf,
 
 		if (id->driver_info & BTUSB_INTEL_BROKEN_INITIAL_NCMD)
 			btintel_set_flag(hdev, INTEL_BROKEN_INITIAL_NCMD);
+
+		if (id->driver_info & BTUSB_INTEL_BROKEN_LED)
+			btintel_set_flag(hdev, INTEL_BROKEN_LED);
 	}
 
 	if (id->driver_info & BTUSB_MARVELL)
-- 
2.25.1