From patchwork Thu Aug 2 20:25:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 10554201 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B7141174A for ; Thu, 2 Aug 2018 20:26:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B9442C3B5 for ; Thu, 2 Aug 2018 20:26:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8F24F2C459; Thu, 2 Aug 2018 20:26:29 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B09032C3B5 for ; Thu, 2 Aug 2018 20:26:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ENr2SWadyK8XUSA53v4WeXFk+qNG5iCoYH5dtbP5e2k=; b=MoU+HYW1f+dazi 23iYeTLHKc5/T9s4A5LaYl6chmQhOPeeVnLEGyb+UXf6eBwpo44rJumrC8gHpoz2uBdyQS1+t3O5X 9cHJcXbhDD3Ky3TPoudxVNgcy8H9k3N3WoqsMj9Oz2ORiUqXFZLm5sSwnP0DCm71pxZCJE1kaYKZo hy3UI9bCMYamqZm1uZZdMmKNfYV3grZHVzWvf6yNxj/QniMRWBsooMflLM7loyOz/2QO+b2Us+ohN d0gT37FI81qLbZ1CDnb6kmBx0So16CSy4SyIb6kj7wQkYPySDlpY3MrRJ/HejMJl9GczKhe+9glXy Od/tjnAG0DR8E6orFF3A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1flKAt-0005ro-C0; Thu, 02 Aug 2018 20:26:19 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1flKAR-0005Cm-1x; Thu, 02 Aug 2018 20:25:57 +0000 X-UUID: 7c51dfdbeb6e4d599127a53fe5664469-20180803 Received: from mtkcas09.mediatek.inc [(172.21.101.178)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 2001522682; Fri, 03 Aug 2018 04:25:35 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Fri, 3 Aug 2018 04:25:33 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1210.3 via Frontend Transport; Fri, 3 Aug 2018 04:25:34 +0800 From: To: , , , Subject: [PATCH v8 2/3] Bluetooth: mediatek: Add protocol support for MediaTek serial devices Date: Fri, 3 Aug 2018 04:25:31 +0800 Message-ID: <5ebf5cdd646ced8388d5914ac6626f417284ef30.1533241009.git.sean.wang@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180802_132551_696991_A23CD9C2 X-CRM114-Status: GOOD ( 25.02 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Sean Wang , linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Sean Wang This adds a driver based on serdev driver for the MediaTek serial protocol based on running H:4, which can enable the built-in Bluetooth device inside MT7622 SoC. Signed-off-by: Sean Wang --- drivers/bluetooth/Kconfig | 11 + drivers/bluetooth/Makefile | 2 + drivers/bluetooth/btmtkuart.c | 588 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 601 insertions(+) create mode 100644 drivers/bluetooth/btmtkuart.c diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index f3c643a..5ace676 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -74,6 +74,17 @@ config BT_HCIBTSDIO Say Y here to compile support for Bluetooth SDIO devices into the kernel or say M to compile it as module (btsdio). +config BT_MTKUART + tristate "MediaTek HCI UART driver" + depends on SERIAL_DEV_BUS + help + MediaTek Bluetooth HCI UART driver. + This driver is required if you want to use MediaTek Bluetooth + with serial interface. + + Say Y here to compile support for MediaTek Bluetooth UART devices + into the kernel or say M to compile it as module (btmtkuart). + config BT_HCIUART tristate "HCI UART driver" depends on SERIAL_DEV_BUS || !SERIAL_DEV_BUS diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile index ec16c55..12ad6e9 100644 --- a/drivers/bluetooth/Makefile +++ b/drivers/bluetooth/Makefile @@ -25,6 +25,8 @@ obj-$(CONFIG_BT_BCM) += btbcm.o obj-$(CONFIG_BT_RTL) += btrtl.o obj-$(CONFIG_BT_QCA) += btqca.o +obj-$(CONFIG_BT_MTKUART) += btmtkuart.o + obj-$(CONFIG_BT_HCIUART_NOKIA) += hci_nokia.o obj-$(CONFIG_BT_HCIRSI) += btrsi.o diff --git a/drivers/bluetooth/btmtkuart.c b/drivers/bluetooth/btmtkuart.c new file mode 100644 index 0000000..8ec7568 --- /dev/null +++ b/drivers/bluetooth/btmtkuart.c @@ -0,0 +1,588 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 MediaTek Inc. + +/* + * Bluetooth support for MediaTek serial devices + * + * Author: Sean Wang + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "h4_recv.h" + +#define VERSION "0.1" + +#define FIRMWARE_MT7622 "mediatek/mt7622pr2h.bin" + +#define MTK_STP_TLR_SIZE 2 + +#define BTMTKUART_TX_STATE_ACTIVE 1 +#define BTMTKUART_TX_STATE_WAKEUP 2 + +enum { + MTK_WMT_PATCH_DWNLD = 0x1, + MTK_WMT_FUNC_CTRL = 0x6, + MTK_WMT_RST = 0x7 +}; + +struct mtk_stp_hdr { + u8 prefix; + u8 dlen1; + u8 dlen2; + u8 cs; +} __packed; + +struct mtk_wmt_hdr { + u8 dir; + u8 op; + __le16 dlen; + u8 flag; +} __packed; + +struct mtk_hci_wmt_cmd { + struct mtk_wmt_hdr hdr; + u8 data[256]; +} __packed; + +struct btmtkuart_dev { + struct hci_dev *hdev; + struct serdev_device *serdev; + struct clk *clk; + + struct work_struct tx_work; + unsigned long tx_state; + struct sk_buff_head txq; + + struct sk_buff *rx_skb; + + u8 stp_pad[6]; + u8 stp_cursor; + u16 stp_dlen; +}; + +static int mtk_hci_wmt_sync(struct hci_dev *hdev, u8 op, u8 flag, u16 plen, + const void *param) +{ + struct mtk_hci_wmt_cmd wc; + struct mtk_wmt_hdr *hdr; + struct sk_buff *skb; + u32 hlen; + + hlen = sizeof(*hdr) + plen; + if (hlen > 255) + return -EINVAL; + + hdr = (struct mtk_wmt_hdr *)&wc; + hdr->dir = 1; + hdr->op = op; + hdr->dlen = cpu_to_le16(plen + 1); + hdr->flag = flag; + memcpy(wc.data, param, plen); + + skb = __hci_cmd_sync_ev(hdev, 0xfc6f, hlen, &wc, HCI_VENDOR_PKT, + HCI_INIT_TIMEOUT); + + if (IS_ERR(skb)) { + int err = PTR_ERR(skb); + + bt_dev_err(hdev, "Failed to send wmt cmd (%d)", err); + return err; + } + + kfree_skb(skb); + + return 0; +} + +static int mtk_setup_fw(struct hci_dev *hdev) +{ + const struct firmware *fw; + const u8 *fw_ptr; + size_t fw_size; + int err, dlen; + u8 flag; + + err = request_firmware(&fw, FIRMWARE_MT7622, &hdev->dev); + if (err < 0) { + bt_dev_err(hdev, "Failed to load firmware file (%d)", err); + return err; + } + + fw_ptr = fw->data; + fw_size = fw->size; + + /* The size of patch header is 30 bytes, should be skip. */ + if (fw_size < 30) + return -EINVAL; + + fw_size -= 30; + fw_ptr += 30; + flag = 1; + + while (fw_size > 0) { + dlen = min_t(int, 250, fw_size); + + /* Tell deivice the position in sequence. */ + if (fw_size - dlen <= 0) + flag = 3; + else if (fw_size < fw->size - 30) + flag = 2; + + err = mtk_hci_wmt_sync(hdev, MTK_WMT_PATCH_DWNLD, flag, dlen, + fw_ptr); + if (err < 0) + break; + + fw_size -= dlen; + fw_ptr += dlen; + } + + release_firmware(fw); + + return err; +} + +static int btmtkuart_recv_event(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct hci_event_hdr *hdr = (void *)skb->data; + + /* Fix up the vendor event id with HCI_VENDOR_PKT instead of + * 0xe4 so that btmon can parse the kind of vendor event properly. + */ + if (hdr->evt == 0xe4) + hdr->evt = HCI_VENDOR_PKT; + + return hci_recv_frame(hdev, skb); +} + +static const struct h4_recv_pkt mtk_recv_pkts[] = { + { H4_RECV_ACL, .recv = hci_recv_frame }, + { H4_RECV_SCO, .recv = hci_recv_frame }, + { H4_RECV_EVENT, .recv = btmtkuart_recv_event }, +}; + +static void btmtkuart_tx_work(struct work_struct *work) +{ + struct btmtkuart_dev *bdev = container_of(work, struct btmtkuart_dev, + tx_work); + struct serdev_device *serdev = bdev->serdev; + struct hci_dev *hdev = bdev->hdev; + + while (1) { + clear_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); + + while (1) { + struct sk_buff *skb = skb_dequeue(&bdev->txq); + int len; + + if (!skb) + break; + + len = serdev_device_write_buf(serdev, skb->data, + skb->len); + hdev->stat.byte_tx += len; + + skb_pull(skb, len); + if (skb->len > 0) { + skb_queue_head(&bdev->txq, skb); + break; + } + + switch (hci_skb_pkt_type(skb)) { + case HCI_COMMAND_PKT: + hdev->stat.cmd_tx++; + break; + case HCI_ACLDATA_PKT: + hdev->stat.acl_tx++; + break; + case HCI_SCODATA_PKT: + hdev->stat.sco_tx++; + break; + } + + kfree_skb(skb); + } + + if (!test_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state)) + break; + } + + clear_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state); +} + +static void btmtkuart_tx_wakeup(struct btmtkuart_dev *bdev) +{ + if (test_and_set_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state)) + set_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); + + schedule_work(&bdev->tx_work); +} + +static const unsigned char * +mtk_stp_split(struct btmtkuart_dev *bdev, const unsigned char *data, int count, + int *sz_h4) +{ + struct mtk_stp_hdr *shdr; + + /* The cursor is reset when all the data of STP is consumed out. */ + if (!bdev->stp_dlen && bdev->stp_cursor >= 6) + bdev->stp_cursor = 0; + + /* Filling pad until all STP info is obtained. */ + while (bdev->stp_cursor < 6 && count > 0) { + bdev->stp_pad[bdev->stp_cursor] = *data; + bdev->stp_cursor++; + data++; + count--; + } + + /* Retrieve STP info and have a sanity check. */ + if (!bdev->stp_dlen && bdev->stp_cursor >= 6) { + shdr = (struct mtk_stp_hdr *)&bdev->stp_pad[2]; + bdev->stp_dlen = (shdr->dlen1 & 0xf) << 8 | shdr->dlen2; + + /* Resync STP when unexpected data is being read. */ + if (shdr->prefix != 0x80 || bdev->stp_dlen > 2048) { + bt_dev_err(bdev->hdev, "stp format unexpect (%d, %d)", + shdr->prefix, bdev->stp_dlen); + bdev->stp_cursor = 2; + bdev->stp_dlen = 0; + } + } + + /* Directly quit when there's no data found for H4 can process. */ + if (count <= 0) + return NULL; + + /* Tranlate to how much the size of data H4 can handle so far. */ + *sz_h4 = min_t(int, count, bdev->stp_dlen); + + /* Update the remaining size of STP packet. */ + bdev->stp_dlen -= *sz_h4; + + /* Data points to STP payload which can be handled by H4. */ + return data; +} + +static int btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) +{ + struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); + const unsigned char *p_left = data, *p_h4; + int sz_left = count, sz_h4, adv; + int err; + + while (sz_left > 0) { + /* The serial data received from MT7622 BT controller is + * at all time padded around with the STP header and tailer. + * + * A full STP packet is looking like + * ----------------------------------- + * | STP header | H:4 | STP tailer | + * ----------------------------------- + * but it doesn't guarantee to contain a full H:4 packet which + * means that it's possible for multiple STP packets forms a + * full H:4 packet that means extra STP header + length doesn't + * indicate a full H:4 frame, things can fragment. Whose length + * recorded in STP header just shows up the most length the + * H:4 engine can handle currently. + */ + + p_h4 = mtk_stp_split(bdev, p_left, sz_left, &sz_h4); + if (!p_h4) + break; + + adv = p_h4 - p_left; + sz_left -= adv; + p_left += adv; + + bdev->rx_skb = h4_recv_buf(bdev->hdev, bdev->rx_skb, p_h4, + sz_h4, mtk_recv_pkts, + sizeof(mtk_recv_pkts)); + if (IS_ERR(bdev->rx_skb)) { + err = PTR_ERR(bdev->rx_skb); + bt_dev_err(bdev->hdev, + "Frame reassembly failed (%d)", err); + bdev->rx_skb = NULL; + return err; + } + + sz_left -= sz_h4; + p_left += sz_h4; + } + + return 0; +} + +static int btmtkuart_receive_buf(struct serdev_device *serdev, const u8 *data, + size_t count) +{ + struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); + int err; + + err = btmtkuart_recv(bdev->hdev, data, count); + if (err < 0) + return err; + + bdev->hdev->stat.byte_rx += count; + + return count; +} + +static void btmtkuart_write_wakeup(struct serdev_device *serdev) +{ + struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); + + btmtkuart_tx_wakeup(bdev); +} + +static const struct serdev_device_ops btmtkuart_client_ops = { + .receive_buf = btmtkuart_receive_buf, + .write_wakeup = btmtkuart_write_wakeup, +}; + +static int btmtkuart_open(struct hci_dev *hdev) +{ + struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); + struct device *dev; + int err; + + err = serdev_device_open(bdev->serdev); + if (err) { + bt_dev_err(hdev, "Unable to open UART device %s", + dev_name(&bdev->serdev->dev)); + goto err_open; + } + + dev = &bdev->serdev->dev; + + bdev->stp_cursor = 2; + bdev->stp_dlen = 0; + + /* Enable the power domain and clock the device requires. */ + pm_runtime_enable(dev); + err = pm_runtime_get_sync(dev); + if (err < 0) { + pm_runtime_put_noidle(dev); + goto err_disable_rpm; + } + + err = clk_prepare_enable(bdev->clk); + if (err < 0) + goto err_put_rpm; + + return 0; + +err_put_rpm: + pm_runtime_put_sync(dev); +err_disable_rpm: + pm_runtime_disable(dev); +err_open: + return err; +} + +static int btmtkuart_close(struct hci_dev *hdev) +{ + struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); + struct device *dev = &bdev->serdev->dev; + + /* Shutdown the clock and power domain the device requires. */ + clk_disable_unprepare(bdev->clk); + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + serdev_device_close(bdev->serdev); + + return 0; +} + +static int btmtkuart_flush(struct hci_dev *hdev) +{ + struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); + + /* Flush any pending characters */ + serdev_device_write_flush(bdev->serdev); + skb_queue_purge(&bdev->txq); + + cancel_work_sync(&bdev->tx_work); + + kfree_skb(bdev->rx_skb); + bdev->rx_skb = NULL; + bdev->stp_cursor = 2; + bdev->stp_dlen = 0; + + return 0; +} + +static int btmtkuart_setup(struct hci_dev *hdev) +{ + u8 param = 0x1; + int err = 0; + + /* Setup a firmware which the device definitely requires. */ + err = mtk_setup_fw(hdev); + if (err < 0) + return err; + + /* Activate funciton the firmware providing to. */ + err = mtk_hci_wmt_sync(hdev, MTK_WMT_RST, 0x4, 0, 0); + if (err < 0) + return err; + + /* Enable Bluetooth protocol. */ + err = mtk_hci_wmt_sync(hdev, MTK_WMT_FUNC_CTRL, 0x0, sizeof(param), + ¶m); + if (err < 0) + return err; + + return 0; +} + +static int btmtkuart_shutdown(struct hci_dev *hdev) +{ + u8 param = 0x0; + int err; + + /* Disable the device. */ + err = mtk_hci_wmt_sync(hdev, MTK_WMT_FUNC_CTRL, 0x0, sizeof(param), + ¶m); + + return err; +} + +static int btmtkuart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); + struct mtk_stp_hdr *shdr; + int err, dlen; + u8 *p; + + /* Prepend skb with frame type */ + memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); + dlen = skb->len; + + /* Make sure that there is enough rooms for STP header and trailer */ + if (unlikely(skb_headroom(skb) < sizeof(*shdr)) || + (skb_tailroom(skb) < MTK_STP_TLR_SIZE)) { + err = pskb_expand_head(skb, sizeof(*shdr), MTK_STP_TLR_SIZE, + GFP_ATOMIC); + if (err < 0) + return err; + } + + /* Add the STP header */ + shdr = skb_push(skb, sizeof(*shdr)); + p = (u8 *)shdr; + shdr->prefix = 0x80; + shdr->dlen1 = (dlen & 0xf00) >> 8; + shdr->dlen2 = dlen & 0xff; + /* MT7622 don't care the checksum value */ + shdr->cs = 0; + /* Add the STP trailer */ + skb_put_zero(skb, MTK_STP_TLR_SIZE); + + skb_queue_tail(&bdev->txq, skb); + + btmtkuart_tx_wakeup(bdev); + return 0; +} + +static int btmtkuart_probe(struct serdev_device *serdev) +{ + struct btmtkuart_dev *bdev; + struct hci_dev *hdev; + + bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL); + if (!bdev) + return -ENOMEM; + + bdev->clk = devm_clk_get(&serdev->dev, "ref"); + if (IS_ERR(bdev->clk)) + return PTR_ERR(bdev->clk); + + bdev->serdev = serdev; + serdev_device_set_drvdata(serdev, bdev); + + serdev_device_set_client_ops(serdev, &btmtkuart_client_ops); + + INIT_WORK(&bdev->tx_work, btmtkuart_tx_work); + skb_queue_head_init(&bdev->txq); + + /* Initialize and register HCI device */ + hdev = hci_alloc_dev(); + if (!hdev) { + dev_err(&serdev->dev, "Can't allocate HCI device\n"); + return -ENOMEM; + } + + bdev->hdev = hdev; + + hdev->bus = HCI_UART; + hci_set_drvdata(hdev, bdev); + + hdev->open = btmtkuart_open; + hdev->close = btmtkuart_close; + hdev->flush = btmtkuart_flush; + hdev->setup = btmtkuart_setup; + hdev->shutdown = btmtkuart_shutdown; + hdev->send = btmtkuart_send_frame; + SET_HCIDEV_DEV(hdev, &serdev->dev); + + hdev->manufacturer = 70; + set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks); + + if (hci_register_dev(hdev) < 0) { + dev_err(&serdev->dev, "Can't register HCI device\n"); + hci_free_dev(hdev); + return -ENODEV; + } + + return 0; +} + +static void btmtkuart_remove(struct serdev_device *serdev) +{ + struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); + struct hci_dev *hdev = bdev->hdev; + + hci_unregister_dev(hdev); + hci_free_dev(hdev); +} + +#ifdef CONFIG_OF +static const struct of_device_id mtk_of_match_table[] = { + { .compatible = "mediatek,mt7622-bluetooth"}, + { } +}; +MODULE_DEVICE_TABLE(of, mtk_of_match_table); +#endif + +static struct serdev_device_driver btmtkuart_driver = { + .probe = btmtkuart_probe, + .remove = btmtkuart_remove, + .driver = { + .name = "btmtkuart", + .of_match_table = of_match_ptr(mtk_of_match_table), + }, +}; + +module_serdev_device_driver(btmtkuart_driver); + +MODULE_AUTHOR("Sean Wang "); +MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE(FIRMWARE_MT7622);