From: sean.wang@kernel.org
To: marcel@holtmann.org, johan.hedberg@gmail.com, luiz.dentz@gmail.com
Cc: linux-bluetooth@vger.kernel.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
Hao Qin <hao.qin@mediatek.com>,
Sean Wang <sean.wang@mediatek.com>
Subject: [PATCH v3 5/5] Bluetooth: btusb: mediatek: add MT7922 subsystem reset
Date: Thu, 25 Apr 2024 15:06:31 -0700 [thread overview]
Message-ID: <986bef1b3b92452ca0d212ccd9b2bbe1267f320a.1714082459.git.sean.wang@kernel.org> (raw)
In-Reply-To: <dfd3a5830333e9b59ad1a1458aac8ac2fe28027a.1714082459.git.sean.wang@kernel.org>
From: Hao Qin <hao.qin@mediatek.com>
Add the support of MT7922 bluetooth subsystem reset that was called the
auto revert to self-recover from the fatal error in the controller like
the host encounters HCI cmd timeout or the controller crashes.
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Hao Qin <hao.qin@mediatek.com>
---
v3: split from the v2 to make the patch do one thing in a patch.
---
drivers/bluetooth/btusb.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 6cfeec2118e9..3485fefc8bad 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3002,7 +3002,16 @@ static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id)
u32 val;
int err;
- if (dev_id == 0x7925) {
+ if (dev_id == 0x7922) {
+ btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+ val |= 0x00002020;
+ btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
+ btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
+ btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
+ val |= BIT(0);
+ btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val);
+ msleep(100);
+ } else if (dev_id == 0x7925) {
btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
val |= (1 << 5);
btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
@@ -3042,6 +3051,9 @@ static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id)
if (err < 0)
bt_dev_err(hdev, "Reset timeout");
+ if (dev_id == 0x7922)
+ btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
+
btusb_mtk_id_get(data, 0x70010200, &val);
if (!val)
bt_dev_err(hdev, "Can't get device id, subsys reset fail.");
--
2.25.1
prev parent reply other threads:[~2024-04-25 22:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-25 22:06 [PATCH v3 1/5] Bluetooth: btmtk: add the function to get the fw name sean.wang
2024-04-25 22:06 ` [PATCH v3 2/5] Bluetooth: btmtk: apply the common btmtk_fw_get_filename sean.wang
2024-04-25 22:06 ` [PATCH v3 3/5] Bluetooth: btusb: mediatek: refactor the function btusb_mtk_reset sean.wang
2024-04-25 22:06 ` [PATCH v3 4/5] Bluetooth: btusb: mediatek: reset the controller before downloading the fw sean.wang
2024-04-25 22:06 ` sean.wang [this message]
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