diff options
Diffstat (limited to 'drivers/bluetooth/btusb.c')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 115c01150c02..a4cee8327295 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3110,6 +3110,17 @@ static int btusb_shutdown_intel_new(struct hci_dev *hdev) return 0; } +/* UHW CR mapping */ +#define MTK_BT_MISC 0x70002510 +#define MTK_BT_SUBSYS_RST 0x70002610 +#define MTK_UDMA_INT_STA_BT 0x74000024 +#define MTK_UDMA_INT_STA_BT1 0x74000308 +#define MTK_BT_WDT_STATUS 0x740003A0 +#define MTK_EP_RST_OPT 0x74011890 +#define MTK_EP_RST_IN_OUT_OPT 0x00010001 +#define MTK_BT_RST_DONE 0x00000100 +#define MTK_BT_RESET_WAIT_MS 100 +#define MTK_BT_RESET_NUM_TRIES 10 #define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin" #define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin" @@ -3684,6 +3695,63 @@ static int btusb_mtk_func_query(struct hci_dev *hdev) return status; } +static int btusb_mtk_uhw_reg_write(struct btusb_data *data, u32 reg, u32 val) +{ + struct hci_dev *hdev = data->hdev; + int pipe, err; + void *buf; + + buf = kzalloc(4, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + put_unaligned_le32(val, buf); + + pipe = usb_sndctrlpipe(data->udev, 0); + err = usb_control_msg(data->udev, pipe, 0x02, + 0x5E, + reg >> 16, reg & 0xffff, + buf, 4, USB_CTRL_SET_TIMEOUT); + if (err < 0) { + bt_dev_err(hdev, "Failed to write uhw reg(%d)", err); + goto err_free_buf; + } + +err_free_buf: + kfree(buf); + + return err; +} + +static int btusb_mtk_uhw_reg_read(struct btusb_data *data, u32 reg, u32 *val) +{ + struct hci_dev *hdev = data->hdev; + int pipe, err; + void *buf; + + buf = kzalloc(4, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + pipe = usb_rcvctrlpipe(data->udev, 0); + err = usb_control_msg(data->udev, pipe, 0x01, + 0xDE, + reg >> 16, reg & 0xffff, + buf, 4, USB_CTRL_SET_TIMEOUT); + if (err < 0) { + bt_dev_err(hdev, "Failed to read uhw reg(%d)", err); + goto err_free_buf; + } + + *val = get_unaligned_le32(buf); + bt_dev_dbg(hdev, "reg=%x, value=0x%08x", reg, *val); + +err_free_buf: + kfree(buf); + + return err; +} + static int btusb_mtk_reg_read(struct btusb_data *data, u32 reg, u32 *val) { int pipe, err, size = sizeof(u32); @@ -3763,6 +3831,9 @@ static int btusb_mtk_setup(struct hci_dev *hdev) dev_id & 0xffff, (fw_version & 0xff) + 1); err = btusb_mtk_setup_firmware_79xx(hdev, fw_bin_name); + /* It's Device EndPoint Reset Option Register */ + btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT); + /* Enable Bluetooth protocol */ param = 1; wmt_params.op = BTMTK_WMT_FUNC_CTRL; @@ -3888,6 +3959,63 @@ static int btusb_mtk_shutdown(struct hci_dev *hdev) return 0; } +static void btusb_mtk_cmd_timeout(struct hci_dev *hdev) +{ + struct btusb_data *data = hci_get_drvdata(hdev); + u32 val; + int err, retry = 0; + + /* It's MediaTek specific bluetooth reset mechanism via USB */ + if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) { + bt_dev_err(hdev, "last reset failed? Not resetting again"); + return; + } + + err = usb_autopm_get_interface(data->intf); + if (err < 0) + return; + + btusb_stop_traffic(data); + usb_kill_anchored_urbs(&data->tx_anchor); + + /* It's Device EndPoint Reset Option Register */ + bt_dev_dbg(hdev, "Initiating reset mechanism via uhw"); + btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT); + btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val); + + /* Reset the bluetooth chip via USB interface. */ + btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1); + btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF); + btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val); + btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF); + btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val); + /* MT7921 need to delay 20ms between toggle reset bit */ + msleep(20); + btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0); + btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val); + + /* Poll the register until reset is completed */ + do { + btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val); + if (val & MTK_BT_RST_DONE) { + bt_dev_dbg(hdev, "Bluetooth Reset Successfully"); + break; + } + + bt_dev_dbg(hdev, "Polling Bluetooth Reset CR"); + retry++; + msleep(MTK_BT_RESET_WAIT_MS); + } while (retry < MTK_BT_RESET_NUM_TRIES); + + btusb_mtk_id_get(data, 0x70010200, &val); + if (!val) + bt_dev_err(hdev, "Can't get device id, subsys reset fail."); + + usb_queue_reset_device(data->intf); + + clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags); +} + static int btusb_recv_acl_mtk(struct hci_dev *hdev, struct sk_buff *skb) { struct btusb_data *data = hci_get_drvdata(hdev); @@ -4738,6 +4866,7 @@ static int btusb_probe(struct usb_interface *intf, hdev->setup = btusb_mtk_setup; hdev->shutdown = btusb_mtk_shutdown; hdev->manufacturer = 70; + hdev->cmd_timeout = btusb_mtk_cmd_timeout; set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); data->recv_acl = btusb_recv_acl_mtk; } |