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Date: Mon, 17 Aug 2020 17:15:08 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Mark Chen <Mark-YW.Chen@...iatek.com>, Sean Wang <sean.wang@...iatek.com>, Marcel Holtmann <marcel@...tmann.org>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.4 107/270] Bluetooth: btmtksdio: fix up firmware download sequence From: Sean Wang <sean.wang@...iatek.com> [ Upstream commit 737cd06072a72e8984e41af8e5919338d0c5bf2b ] Data RAM on the device have to be powered on before starting to download the firmware. Fixes: 9aebfd4a2200 ("Bluetooth: mediatek: add support for MediaTek MT7663S and MT7668S SDIO devices") Co-developed-by: Mark Chen <Mark-YW.Chen@...iatek.com> Signed-off-by: Mark Chen <Mark-YW.Chen@...iatek.com> Signed-off-by: Sean Wang <sean.wang@...iatek.com> Signed-off-by: Marcel Holtmann <marcel@...tmann.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/bluetooth/btmtksdio.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index 8133382884537..b7de7cb8cca90 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -684,7 +684,7 @@ static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname) const u8 *fw_ptr; size_t fw_size; int err, dlen; - u8 flag; + u8 flag, param; err = request_firmware(&fw, fwname, &hdev->dev); if (err < 0) { @@ -692,6 +692,20 @@ static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname) return err; } + /* Power on data RAM the firmware relies on. */ + param = 1; + wmt_params.op = MTK_WMT_FUNC_CTRL; + wmt_params.flag = 3; + wmt_params.dlen = sizeof(param); + wmt_params.data = ¶m; + wmt_params.status = NULL; + + err = mtk_hci_wmt_sync(hdev, &wmt_params); + if (err < 0) { + bt_dev_err(hdev, "Failed to power on data RAM (%d)", err); + return err; + } + fw_ptr = fw->data; fw_size = fw->size; -- 2.25.1
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