1 files changed, 979 insertions, 0 deletions

diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
new file mode 100644
index 000000000000..b4b8320f279e
--- /dev/null
+++ b/drivers/bluetooth/btmtksdio.c
@@ -0,0 +1,979 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 MediaTek Inc.
+
+/*
+ * Bluetooth support for MediaTek SDIO devices
+ *
+ * This file is written based on btsdio.c and btmtkuart.c.
+ *
+ * Author: Sean Wang <sean.wang@mediatek.com>
+ *
+ */
+
+#include <asm/unaligned.h>
+#include <linux/atomic.h>
+#include <linux/firmware.h>
+#include <linux/init.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/mmc/sdio_func.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "h4_recv.h"
+
+#define VERSION "0.1"
+
+#define FIRMWARE_MT7663         "mediatek/mt7663pr2h.bin"
+#define FIRMWARE_MT7668         "mediatek/mt7668pr2h.bin"
+
+struct btmtksdio_data {
+        const char *fwname;
+};
+
+static const struct btmtksdio_data mt7663_data = {
+        .fwname = FIRMWARE_MT7663,
+};
+
+static const struct btmtksdio_data mt7668_data = {
+        .fwname = FIRMWARE_MT7668,
+};
+
+static const struct sdio_device_id btmtksdio_table[] = {
+        {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7663),
+         .driver_data = (kernel_ulong_t)&mt7663_data },
+        {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7668),
+         .driver_data = (kernel_ulong_t)&mt7668_data },
+        { }     /* Terminating entry */
+};
+
+#define MTK_REG_CHLPCR          0x4     /* W1S */
+#define C_INT_EN_SET            BIT(0)
+#define C_INT_EN_CLR            BIT(1)
+#define C_FW_OWN_REQ_SET        BIT(8)
+#define C_FW_OWN_REQ_CLR        BIT(9)
+
+#define MTK_REG_CSDIOCSR        0x8
+#define SDIO_RE_INIT_EN         BIT(0)
+#define SDIO_INT_CTL            BIT(2)
+
+#define MTK_REG_CHCR            0xc
+#define C_INT_CLR_CTRL          BIT(1)
+
+/* CHISR have the same bits field definition with CHIER */
+#define MTK_REG_CHISR           0x10
+#define MTK_REG_CHIER           0x14
+#define FW_OWN_BACK_INT         BIT(0)
+#define RX_DONE_INT             BIT(1)
+#define TX_EMPTY                BIT(2)
+#define TX_FIFO_OVERFLOW        BIT(8)
+#define RX_PKT_LEN              GENMASK(31, 16)
+
+#define MTK_REG_CTDR            0x18
+
+#define MTK_REG_CRDR            0x1c
+
+#define MTK_SDIO_BLOCK_SIZE     256
+
+#define BTMTKSDIO_TX_WAIT_VND_EVT       1
+
+enum {
+        MTK_WMT_PATCH_DWNLD = 0x1,
+        MTK_WMT_TEST = 0x2,
+        MTK_WMT_WAKEUP = 0x3,
+        MTK_WMT_HIF = 0x4,
+        MTK_WMT_FUNC_CTRL = 0x6,
+        MTK_WMT_RST = 0x7,
+        MTK_WMT_SEMAPHORE = 0x17,
+};
+
+enum {
+        BTMTK_WMT_INVALID,
+        BTMTK_WMT_PATCH_UNDONE,
+        BTMTK_WMT_PATCH_DONE,
+        BTMTK_WMT_ON_UNDONE,
+        BTMTK_WMT_ON_DONE,
+        BTMTK_WMT_ON_PROGRESS,
+};
+
+struct mtkbtsdio_hdr {
+        __le16  len;
+        __le16  reserved;
+        u8      bt_type;
+} __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 btmtk_hci_wmt_evt {
+        struct hci_event_hdr hhdr;
+        struct mtk_wmt_hdr whdr;
+} __packed;
+
+struct btmtk_hci_wmt_evt_funcc {
+        struct btmtk_hci_wmt_evt hwhdr;
+        __be16 status;
+} __packed;
+
+struct btmtk_tci_sleep {
+        u8 mode;
+        __le16 duration;
+        __le16 host_duration;
+        u8 host_wakeup_pin;
+        u8 time_compensation;
+} __packed;
+
+struct btmtk_hci_wmt_params {
+        u8 op;
+        u8 flag;
+        u16 dlen;
+        const void *data;
+        u32 *status;
+};
+
+struct btmtksdio_dev {
+        struct hci_dev *hdev;
+        struct sdio_func *func;
+
+        struct work_struct tx_work;
+        unsigned long tx_state;
+        struct sk_buff_head txq;
+
+        struct sk_buff *evt_skb;
+
+        const struct btmtksdio_data *data;
+};
+
+static int mtk_hci_wmt_sync(struct hci_dev *hdev,
+                            struct btmtk_hci_wmt_params *wmt_params)
+{
+        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+        struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
+        u32 hlen, status = BTMTK_WMT_INVALID;
+        struct btmtk_hci_wmt_evt *wmt_evt;
+        struct mtk_hci_wmt_cmd wc;
+        struct mtk_wmt_hdr *hdr;
+        int err;
+
+        hlen = sizeof(*hdr) + wmt_params->dlen;
+        if (hlen > 255)
+                return -EINVAL;
+
+        hdr = (struct mtk_wmt_hdr *)&wc;
+        hdr->dir = 1;
+        hdr->op = wmt_params->op;
+        hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
+        hdr->flag = wmt_params->flag;
+        memcpy(wc.data, wmt_params->data, wmt_params->dlen);
+
+        set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
+
+        err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
+        if (err < 0) {
+                clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
+                return err;
+        }
+
+        /* The vendor specific WMT commands are all answered by a vendor
+         * specific event and will not have the Command Status or Command
+         * Complete as with usual HCI command flow control.
+         *
+         * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
+         * state to be cleared. The driver specific event receive routine
+         * will clear that state and with that indicate completion of the
+         * WMT command.
+         */
+        err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT,
+                                  TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
+        if (err == -EINTR) {
+                bt_dev_err(hdev, "Execution of wmt command interrupted");
+                clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
+                return err;
+        }
+
+        if (err) {
+                bt_dev_err(hdev, "Execution of wmt command timed out");
+                clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
+                return -ETIMEDOUT;
+        }
+
+        /* Parse and handle the return WMT event */
+        wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
+        if (wmt_evt->whdr.op != hdr->op) {
+                bt_dev_err(hdev, "Wrong op received %d expected %d",
+                           wmt_evt->whdr.op, hdr->op);
+                err = -EIO;
+                goto err_free_skb;
+        }
+
+        switch (wmt_evt->whdr.op) {
+        case MTK_WMT_SEMAPHORE:
+                if (wmt_evt->whdr.flag == 2)
+                        status = BTMTK_WMT_PATCH_UNDONE;
+                else
+                        status = BTMTK_WMT_PATCH_DONE;
+                break;
+        case MTK_WMT_FUNC_CTRL:
+                wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
+                if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
+                        status = BTMTK_WMT_ON_DONE;
+                else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
+                        status = BTMTK_WMT_ON_PROGRESS;
+                else
+                        status = BTMTK_WMT_ON_UNDONE;
+                break;
+        }
+
+        if (wmt_params->status)
+                *wmt_params->status = status;
+
+err_free_skb:
+        kfree_skb(bdev->evt_skb);
+        bdev->evt_skb = NULL;
+
+        return err;
+}
+
+static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
+                               struct sk_buff *skb)
+{
+        struct mtkbtsdio_hdr *sdio_hdr;
+        int err;
+
+        /* Make sure that there are enough rooms for SDIO header */
+        if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
+                err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
+                                       GFP_ATOMIC);
+                if (err < 0)
+                        return err;
+        }
+
+        /* Prepend MediaTek SDIO Specific Header */
+        skb_push(skb, sizeof(*sdio_hdr));
+
+        sdio_hdr = (void *)skb->data;
+        sdio_hdr->len = cpu_to_le16(skb->len);
+        sdio_hdr->reserved = cpu_to_le16(0);
+        sdio_hdr->bt_type = hci_skb_pkt_type(skb);
+
+        err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
+                           round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
+        if (err < 0)
+                goto err_skb_pull;
+
+        bdev->hdev->stat.byte_tx += skb->len;
+
+        kfree_skb(skb);
+
+        return 0;
+
+err_skb_pull:
+        skb_pull(skb, sizeof(*sdio_hdr));
+
+        return err;
+}
+
+static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
+{
+        return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
+}
+
+static void btmtksdio_tx_work(struct work_struct *work)
+{
+        struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
+                                                  tx_work);
+        struct sk_buff *skb;
+        int err;
+
+        sdio_claim_host(bdev->func);
+
+        while ((skb = skb_dequeue(&bdev->txq))) {
+                err = btmtksdio_tx_packet(bdev, skb);
+                if (err < 0) {
+                        bdev->hdev->stat.err_tx++;
+                        skb_queue_head(&bdev->txq, skb);
+                        break;
+                }
+        }
+
+        sdio_release_host(bdev->func);
+}
+
+static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
+{
+        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+        struct hci_event_hdr *hdr = (void *)skb->data;
+        int err;
+
+        /* Fix up the vendor event id with 0xff for vendor specific instead
+         * of 0xe4 so that event send via monitoring socket can be parsed
+         * properly.
+         */
+        if (hdr->evt == 0xe4)
+                hdr->evt = HCI_EV_VENDOR;
+
+        /* When someone waits for the WMT event, the skb is being cloned
+         * and being processed the events from there then.
+         */
+        if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) {
+                bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
+                if (!bdev->evt_skb) {
+                        err = -ENOMEM;
+                        goto err_out;
+                }
+        }
+
+        err = hci_recv_frame(hdev, skb);
+        if (err < 0)
+                goto err_free_skb;
+
+        if (hdr->evt == HCI_EV_VENDOR) {
+                if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT,
+                                       &bdev->tx_state)) {
+                        /* Barrier to sync with other CPUs */
+                        smp_mb__after_atomic();
+                        wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT);
+                }
+        }
+
+        return 0;
+
+err_free_skb:
+        kfree_skb(bdev->evt_skb);
+        bdev->evt_skb = NULL;
+
+err_out:
+        return err;
+}
+
+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 = btmtksdio_recv_event },
+};
+
+static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
+{
+        const struct h4_recv_pkt *pkts = mtk_recv_pkts;
+        int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
+        struct mtkbtsdio_hdr *sdio_hdr;
+        unsigned char *old_data;
+        unsigned int old_len;
+        int err, i, pad_size;
+        struct sk_buff *skb;
+        u16 dlen;
+
+        if (rx_size < sizeof(*sdio_hdr))
+                return -EILSEQ;
+
+        /* A SDIO packet is exactly containing a Bluetooth packet */
+        skb = bt_skb_alloc(rx_size, GFP_KERNEL);
+        if (!skb)
+                return -ENOMEM;
+
+        skb_put(skb, rx_size);
+
+        err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
+        if (err < 0)
+                goto err_kfree_skb;
+
+        /* Keep old data for dump the content in case of some error is
+         * caught in the following packet parsing.
+         */
+        old_data = skb->data;
+        old_len = skb->len;
+
+        bdev->hdev->stat.byte_rx += rx_size;
+
+        sdio_hdr = (void *)skb->data;
+
+        /* We assume the default error as -EILSEQ simply to make the error path
+         * be cleaner.
+         */
+        err = -EILSEQ;
+
+        if (rx_size != le16_to_cpu(sdio_hdr->len)) {
+                bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
+                goto err_kfree_skb;
+        }
+
+        hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
+
+        /* Remove MediaTek SDIO header */
+        skb_pull(skb, sizeof(*sdio_hdr));
+
+        /* We have to dig into the packet to get payload size and then know how
+         * many padding bytes at the tail, these padding bytes should be removed
+         * before the packet is indicated to the core layer.
+         */
+        for (i = 0; i < pkts_count; i++) {
+                if (sdio_hdr->bt_type == (&pkts[i])->type)
+                        break;
+        }
+
+        if (i >= pkts_count) {
+                bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
+                           sdio_hdr->bt_type);
+                goto err_kfree_skb;
+        }
+
+        /* Remaining bytes cannot hold a header*/
+        if (skb->len < (&pkts[i])->hlen) {
+                bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
+                goto err_kfree_skb;
+        }
+
+        switch ((&pkts[i])->lsize) {
+                case 1:
+                        dlen = skb->data[(&pkts[i])->loff];
+                        break;
+                case 2:
+                        dlen = get_unaligned_le16(skb->data +
+                                                  (&pkts[i])->loff);
+                        break;
+                default:
+                        goto err_kfree_skb;
+        }
+
+        pad_size = skb->len - (&pkts[i])->hlen -  dlen;
+
+        /* Remaining bytes cannot hold a payload */
+        if (pad_size < 0) {
+                bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
+                goto err_kfree_skb;
+        }
+
+        /* Remove padding bytes */
+        skb_trim(skb, skb->len - pad_size);
+
+        /* Complete frame */
+        (&pkts[i])->recv(bdev->hdev, skb);
+
+        return 0;
+
+err_kfree_skb:
+        print_hex_dump(KERN_ERR, "err sdio rx: ", DUMP_PREFIX_NONE, 4, 1,
+                       old_data, old_len, true);
+        kfree_skb(skb);
+
+        return err;
+}
+
+static void btmtksdio_interrupt(struct sdio_func *func)
+{
+        struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
+        u32 int_status;
+        u16 rx_size;
+
+        /* Disable interrupt */
+        sdio_writel(func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
+
+        int_status = sdio_readl(func, MTK_REG_CHISR, NULL);
+
+        /* Ack an interrupt as soon as possible before any operation on
+         * hardware.
+         *
+         * Note that we don't ack any status during operations to avoid race
+         * condition between the host and the device such as it's possible to
+         * mistakenly ack RX_DONE for the next packet and then cause interrupts
+         * not be raised again but there is still pending data in the hardware
+         * FIFO.
+         */
+        sdio_writel(func, int_status, MTK_REG_CHISR, NULL);
+
+        if (unlikely(!int_status))
+                bt_dev_err(bdev->hdev, "CHISR is 0\n");
+
+        if (int_status & FW_OWN_BACK_INT)
+                bt_dev_dbg(bdev->hdev, "Get fw own back\n");
+
+        if (int_status & TX_EMPTY)
+                schedule_work(&bdev->tx_work);
+        else if (unlikely(int_status & TX_FIFO_OVERFLOW))
+                bt_dev_warn(bdev->hdev, "Tx fifo overflow\n");
+
+        if (int_status & RX_DONE_INT) {
+                rx_size = (int_status & RX_PKT_LEN) >> 16;
+
+                if (btmtksdio_rx_packet(bdev, rx_size) < 0)
+                        bdev->hdev->stat.err_rx++;
+        }
+
+        /* Enable interrupt */
+        sdio_writel(func, C_INT_EN_SET, MTK_REG_CHLPCR, 0);
+}
+
+static int btmtksdio_open(struct hci_dev *hdev)
+{
+        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+        int err;
+        u32 status;
+
+        sdio_claim_host(bdev->func);
+
+        err = sdio_enable_func(bdev->func);
+        if (err < 0)
+                goto err_release_host;
+
+        /* Get ownership from the device */
+        sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
+        if (err < 0)
+                goto err_disable_func;
+
+        err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
+                                 status & C_FW_OWN_REQ_SET, 2000, 1000000);
+        if (err < 0) {
+                bt_dev_err(bdev->hdev, "Cannot get ownership from device");
+                goto err_disable_func;
+        }
+
+        /* Disable interrupt & mask out all interrupt sources */
+        sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
+        if (err < 0)
+                goto err_disable_func;
+
+        sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
+        if (err < 0)
+                goto err_disable_func;
+
+        err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
+        if (err < 0)
+                goto err_disable_func;
+
+        err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
+        if (err < 0)
+                goto err_release_irq;
+
+        /* SDIO CMD 5 allows the SDIO device back to idle state an
+         * synchronous interrupt is supported in SDIO 4-bit mode
+         */
+        sdio_writel(bdev->func, SDIO_INT_CTL | SDIO_RE_INIT_EN,
+                    MTK_REG_CSDIOCSR, &err);
+        if (err < 0)
+                goto err_release_irq;
+
+        /* Setup write-1-clear for CHISR register */
+        sdio_writel(bdev->func, C_INT_CLR_CTRL, MTK_REG_CHCR, &err);
+        if (err < 0)
+                goto err_release_irq;
+
+        /* Setup interrupt sources */
+        sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
+                    MTK_REG_CHIER, &err);
+        if (err < 0)
+                goto err_release_irq;
+
+        /* Enable interrupt */
+        sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
+        if (err < 0)
+                goto err_release_irq;
+
+        sdio_release_host(bdev->func);
+
+        return 0;
+
+err_release_irq:
+        sdio_release_irq(bdev->func);
+
+err_disable_func:
+        sdio_disable_func(bdev->func);
+
+err_release_host:
+        sdio_release_host(bdev->func);
+
+        return err;
+}
+
+static int btmtksdio_close(struct hci_dev *hdev)
+{
+        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+        u32 status;
+        int err;
+
+        sdio_claim_host(bdev->func);
+
+        /* Disable interrupt */
+        sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
+
+        sdio_release_irq(bdev->func);
+
+        /* Return ownership to the device */
+        sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, NULL);
+
+        err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
+                                 !(status & C_FW_OWN_REQ_SET), 2000, 1000000);
+        if (err < 0)
+                bt_dev_err(bdev->hdev, "Cannot return ownership to device");
+
+        sdio_disable_func(bdev->func);
+
+        sdio_release_host(bdev->func);
+
+        return 0;
+}
+
+static int btmtksdio_flush(struct hci_dev *hdev)
+{
+        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+
+        skb_queue_purge(&bdev->txq);
+
+        cancel_work_sync(&bdev->tx_work);
+
+        return 0;
+}
+
+static int btmtksdio_func_query(struct hci_dev *hdev)
+{
+        struct btmtk_hci_wmt_params wmt_params;
+        int status, err;
+        u8 param = 0;
+
+        /* Query whether the function is enabled */
+        wmt_params.op = MTK_WMT_FUNC_CTRL;
+        wmt_params.flag = 4;
+        wmt_params.dlen = sizeof(param);
+        wmt_params.data = &param;
+        wmt_params.status = &status;
+
+        err = mtk_hci_wmt_sync(hdev, &wmt_params);
+        if (err < 0) {
+                bt_dev_err(hdev, "Failed to query function status (%d)", err);
+                return err;
+        }
+
+        return status;
+}
+
+static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
+{
+        struct btmtk_hci_wmt_params wmt_params;
+        const struct firmware *fw;
+        const u8 *fw_ptr;
+        size_t fw_size;
+        int err, dlen;
+        u8 flag;
+
+        err = request_firmware(&fw, fwname, &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) {
+                err = -EINVAL;
+                goto free_fw;
+        }
+
+        fw_size -= 30;
+        fw_ptr += 30;
+        flag = 1;
+
+        wmt_params.op = MTK_WMT_PATCH_DWNLD;
+        wmt_params.status = NULL;
+
+        while (fw_size > 0) {
+                dlen = min_t(int, 250, fw_size);
+
+                /* Tell device the position in sequence */
+                if (fw_size - dlen <= 0)
+                        flag = 3;
+                else if (fw_size < fw->size - 30)
+                        flag = 2;
+
+                wmt_params.flag = flag;
+                wmt_params.dlen = dlen;
+                wmt_params.data = fw_ptr;
+
+                err = mtk_hci_wmt_sync(hdev, &wmt_params);
+                if (err < 0) {
+                        bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
+                                   err);
+                        goto free_fw;
+                }
+
+                fw_size -= dlen;
+                fw_ptr += dlen;
+        }
+
+        wmt_params.op = MTK_WMT_RST;
+        wmt_params.flag = 4;
+        wmt_params.dlen = 0;
+        wmt_params.data = NULL;
+        wmt_params.status = NULL;
+
+        /* Activate funciton the firmware providing to */
+        err = mtk_hci_wmt_sync(hdev, &wmt_params);
+        if (err < 0) {
+                bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
+                goto free_fw;
+        }
+
+        /* Wait a few moments for firmware activation done */
+        usleep_range(10000, 12000);
+
+free_fw:
+        release_firmware(fw);
+        return err;
+}
+
+static int btmtksdio_setup(struct hci_dev *hdev)
+{
+        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+        struct btmtk_hci_wmt_params wmt_params;
+        ktime_t calltime, delta, rettime;
+        struct btmtk_tci_sleep tci_sleep;
+        unsigned long long duration;
+        struct sk_buff *skb;
+        int err, status;
+        u8 param = 0x1;
+
+        calltime = ktime_get();
+
+        /* Query whether the firmware is already download */
+        wmt_params.op = MTK_WMT_SEMAPHORE;
+        wmt_params.flag = 1;
+        wmt_params.dlen = 0;
+        wmt_params.data = NULL;
+        wmt_params.status = &status;
+
+        err = mtk_hci_wmt_sync(hdev, &wmt_params);
+        if (err < 0) {
+                bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
+                return err;
+        }
+
+        if (status == BTMTK_WMT_PATCH_DONE) {
+                bt_dev_info(hdev, "Firmware already downloaded");
+                goto ignore_setup_fw;
+        }
+
+        /* Setup a firmware which the device definitely requires */
+        err = mtk_setup_firmware(hdev, bdev->data->fwname);
+        if (err < 0)
+                return err;
+
+ignore_setup_fw:
+        /* Query whether the device is already enabled */
+        err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
+                                 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
+                                 2000, 5000000);
+        /* -ETIMEDOUT happens */
+        if (err < 0)
+                return err;
+
+        /* The other errors happen in btusb_mtk_func_query */
+        if (status < 0)
+                return status;
+
+        if (status == BTMTK_WMT_ON_DONE) {
+                bt_dev_info(hdev, "function already on");
+                goto ignore_func_on;
+        }
+
+        /* Enable Bluetooth protocol */
+        wmt_params.op = MTK_WMT_FUNC_CTRL;
+        wmt_params.flag = 0;
+        wmt_params.dlen = sizeof(param);
+        wmt_params.data = &param;
+        wmt_params.status = NULL;
+
+        err = mtk_hci_wmt_sync(hdev, &wmt_params);
+        if (err < 0) {
+                bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+                return err;
+        }
+
+ignore_func_on:
+        /* Apply the low power environment setup */
+        tci_sleep.mode = 0x5;
+        tci_sleep.duration = cpu_to_le16(0x640);
+        tci_sleep.host_duration = cpu_to_le16(0x640);
+        tci_sleep.host_wakeup_pin = 0;
+        tci_sleep.time_compensation = 0;
+
+        skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
+                             HCI_INIT_TIMEOUT);
+        if (IS_ERR(skb)) {
+                err = PTR_ERR(skb);
+                bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
+                return err;
+        }
+        kfree_skb(skb);
+
+        rettime = ktime_get();
+        delta = ktime_sub(rettime, calltime);
+        duration = (unsigned long long)ktime_to_ns(delta) >> 10;
+
+        bt_dev_info(hdev, "Device setup in %llu usecs", duration);
+
+        return 0;
+}
+
+static int btmtksdio_shutdown(struct hci_dev *hdev)
+{
+        struct btmtk_hci_wmt_params wmt_params;
+        u8 param = 0x0;
+        int err;
+
+        /* Disable the device */
+        wmt_params.op = MTK_WMT_FUNC_CTRL;
+        wmt_params.flag = 0;
+        wmt_params.dlen = sizeof(param);
+        wmt_params.data = &param;
+        wmt_params.status = NULL;
+
+        err = mtk_hci_wmt_sync(hdev, &wmt_params);
+        if (err < 0) {
+                bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
+                return err;
+        }
+
+        return 0;
+}
+
+static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
+{
+        struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+
+        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;
+
+        default:
+                return -EILSEQ;
+        }
+
+        skb_queue_tail(&bdev->txq, skb);
+
+        schedule_work(&bdev->tx_work);
+
+        return 0;
+}
+
+static int btmtksdio_probe(struct sdio_func *func,
+                           const struct sdio_device_id *id)
+{
+        struct btmtksdio_dev *bdev;
+        struct hci_dev *hdev;
+        int err;
+
+        bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
+        if (!bdev)
+                return -ENOMEM;
+
+        bdev->data = (void *)id->driver_data;
+        if (!bdev->data)
+                return -ENODEV;
+
+        bdev->func = func;
+
+        INIT_WORK(&bdev->tx_work, btmtksdio_tx_work);
+        skb_queue_head_init(&bdev->txq);
+
+        /* Initialize and register HCI device */
+        hdev = hci_alloc_dev();
+        if (!hdev) {
+                dev_err(&func->dev, "Can't allocate HCI device\n");
+                return -ENOMEM;
+        }
+
+        bdev->hdev = hdev;
+
+        hdev->bus = HCI_SDIO;
+        hci_set_drvdata(hdev, bdev);
+
+        hdev->open     = btmtksdio_open;
+        hdev->close    = btmtksdio_close;
+        hdev->flush    = btmtksdio_flush;
+        hdev->setup    = btmtksdio_setup;
+        hdev->shutdown = btmtksdio_shutdown;
+        hdev->send     = btmtksdio_send_frame;
+        SET_HCIDEV_DEV(hdev, &func->dev);
+
+        hdev->manufacturer = 70;
+        set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
+
+        err = hci_register_dev(hdev);
+        if (err < 0) {
+                dev_err(&func->dev, "Can't register HCI device\n");
+                hci_free_dev(hdev);
+                return err;
+        }
+
+        sdio_set_drvdata(func, bdev);
+
+        return 0;
+}
+
+static void btmtksdio_remove(struct sdio_func *func)
+{
+        struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
+        struct hci_dev *hdev;
+
+        if (!bdev)
+                return;
+
+        hdev = bdev->hdev;
+
+        sdio_set_drvdata(func, NULL);
+        hci_unregister_dev(hdev);
+        hci_free_dev(hdev);
+}
+
+static struct sdio_driver btmtksdio_driver = {
+        .name           = "btmtksdio",
+        .probe          = btmtksdio_probe,
+        .remove         = btmtksdio_remove,
+        .id_table       = btmtksdio_table,
+};
+
+static int __init btmtksdio_init(void)
+{
+        BT_INFO("MediaTek Bluetooth SDIO driver ver %s", VERSION);
+
+        return sdio_register_driver(&btmtksdio_driver);
+}
+
+static void __exit btmtksdio_exit(void)
+{
+        sdio_unregister_driver(&btmtksdio_driver);
+}
+
+module_init(btmtksdio_init);
+module_exit(btmtksdio_exit);
+
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
+MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(FIRMWARE_MT7663);
+MODULE_FIRMWARE(FIRMWARE_MT7668);