linux-kernel - [PATCH] Bluetooth: btrtl: Ask ic

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Date:   Thu, 30 Sep 2021 18:36:34 +0800
From:   <hildawu@...ltek.com>
To:     <marcel@...tmann.org>
CC:     <johan.hedberg@...il.com>, <luiz.dentz@...il.com>,
        <linux-bluetooth@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kai.heng.feng@...onical.com>, <apusaka@...omium.org>,
        <max.chou@...ltek.com>, <alex_lu@...lsil.com.cn>,
        <kidman@...ltek.com>
Subject: [PATCH] Bluetooth: btrtl: Ask ic_info to drop firmware

From: Hilda Wu <hildawu@...ltek.com>

Some un-support wakeup platforms keep USB power and suspend signal
is coming late, this makes Realtek some chip keep its firmware,
and make it never load new firmware.

So use vendor specific HCI command to ask them drop its firmware after
system shutdown or resume.

Signed-off-by: Hilda Wu <hildawu@...ltek.com>
---
 drivers/bluetooth/btrtl.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
index 1f8afa0244d8..60ddba8962ff 100644
--- a/drivers/bluetooth/btrtl.c
+++ b/drivers/bluetooth/btrtl.c
@@ -594,8 +594,10 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
 	hci_rev = le16_to_cpu(resp->hci_rev);
 	lmp_subver = le16_to_cpu(resp->lmp_subver);
 
-	if (resp->hci_ver == 0x8 && le16_to_cpu(resp->hci_rev) == 0x826c &&
-	    resp->lmp_ver == 0x8 && le16_to_cpu(resp->lmp_subver) == 0xa99e)
+	btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
+					    hdev->bus);
+
+	if (!btrtl_dev->ic_info)
 		btrtl_dev->drop_fw = true;
 
 	if (btrtl_dev->drop_fw) {
@@ -634,13 +636,13 @@ struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
 		hci_ver = resp->hci_ver;
 		hci_rev = le16_to_cpu(resp->hci_rev);
 		lmp_subver = le16_to_cpu(resp->lmp_subver);
+
+		btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
+						    hdev->bus);
 	}
 out_free:
 	kfree_skb(skb);
 
-	btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, hci_ver,
-					    hdev->bus);
-
 	if (!btrtl_dev->ic_info) {
 		rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, hci rev %04x, hci ver %04x",
 			    lmp_subver, hci_rev, hci_ver);
-- 
2.17.1