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Bluetooth: btusb: mediatek: add MT7922 subsystem reset

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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>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Hao Qin 2024-05-15 16:15:21 -07:00 committed by Luiz Augusto von Dentz
parent ccfc8948d7
commit 064aee5010
1 changed files with 13 additions and 1 deletions
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14
drivers/bluetooth/btusb.c
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@ -3039,7 +3039,16 @@ 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);
@ -3079,6 +3088,9 @@ 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.");