From ce64b3e949195768361b0e4111e0837e5e46930d Mon Sep 17 00:00:00 2001 From: Mark Chen Date: Mon, 10 Jan 2022 03:23:58 +0800 Subject: [PATCH] Bluetooth: mt7921s: Support wake on bluetooth Enable wake on bluetooth on mt7921s that can be supported since the firmware with version 20211129211059 was added, and the patch would not cause any harm even when the old firmware is applied. The patch was tested by setting up an HID or HOGP profile to connect a Bluetooth keyboard and mouse, then putting the system to suspend, then trying to wake up the system by moving the Bluetooth keyboard or mouse, and then checking if the system can wake up and be brought back to the normal state. Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: Mark Chen Signed-off-by: Marcel Holtmann --- drivers/bluetooth/btmtk.h | 8 ++++++++ drivers/bluetooth/btmtksdio.c | 33 ++++++++++++++++++++++++++++++++- 2 files changed, 40 insertions(+), 1 deletion(-) diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h index 6e7b0c7567c0..2be1d2680ad8 100644 --- a/drivers/bluetooth/btmtk.h +++ b/drivers/bluetooth/btmtk.h @@ -68,6 +68,14 @@ struct btmtk_tci_sleep { u8 time_compensation; } __packed; +struct btmtk_wakeon { + u8 mode; + u8 gpo; + u8 active_high; + __le16 enable_delay; + __le16 wakeup_delay; +} __packed; + struct btmtk_hci_wmt_params { u8 op; u8 flag; diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index 891e34b50e44..a8273874e29f 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -958,6 +958,32 @@ static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb) return 0; } +static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev) +{ + struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); + bool may_wakeup = device_may_wakeup(bdev->dev); + const struct btmtk_wakeon bt_awake = { + .mode = 0x1, + .gpo = 0, + .active_high = 0x1, + .enable_delay = cpu_to_le16(0xc80), + .wakeup_delay = cpu_to_le16(0x20), + }; + + if (may_wakeup && bdev->data->chipid == 0x7921) { + struct sk_buff *skb; + + skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake), + &bt_awake, HCI_CMD_TIMEOUT); + if (IS_ERR(skb)) + may_wakeup = false; + + kfree_skb(skb); + } + + return may_wakeup; +} + static int btmtksdio_probe(struct sdio_func *func, const struct sdio_device_id *id) { @@ -997,6 +1023,7 @@ static int btmtksdio_probe(struct sdio_func *func, hdev->setup = btmtksdio_setup; hdev->shutdown = btmtksdio_shutdown; hdev->send = btmtksdio_send_frame; + hdev->wakeup = btmtksdio_sdio_wakeup; hdev->set_bdaddr = btmtk_set_bdaddr; SET_HCIDEV_DEV(hdev, &func->dev); @@ -1032,7 +1059,11 @@ static int btmtksdio_probe(struct sdio_func *func, */ pm_runtime_put_noidle(bdev->dev); - return 0; + err = device_init_wakeup(bdev->dev, true); + if (err) + bt_dev_err(hdev, "failed to initialize device wakeup"); + + return err; } static void btmtksdio_remove(struct sdio_func *func)