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-rw-r--r--drivers/bluetooth/btmtksdio.c1503
1 files changed, 1503 insertions, 0 deletions
diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
new file mode 100644
index 0000000000..f9a3444753
--- /dev/null
+++ b/drivers/bluetooth/btmtksdio.c
@@ -0,0 +1,1503 @@
+// 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/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.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"
+#include "btmtk.h"
+
+#define VERSION "0.1"
+
+#define MTKBTSDIO_AUTOSUSPEND_DELAY 1000
+
+static bool enable_autosuspend = true;
+
+struct btmtksdio_data {
+ const char *fwname;
+ u16 chipid;
+ bool lp_mbox_supported;
+};
+
+static const struct btmtksdio_data mt7663_data = {
+ .fwname = FIRMWARE_MT7663,
+ .chipid = 0x7663,
+ .lp_mbox_supported = false,
+};
+
+static const struct btmtksdio_data mt7668_data = {
+ .fwname = FIRMWARE_MT7668,
+ .chipid = 0x7668,
+ .lp_mbox_supported = false,
+};
+
+static const struct btmtksdio_data mt7921_data = {
+ .fwname = FIRMWARE_MT7961,
+ .chipid = 0x7921,
+ .lp_mbox_supported = true,
+};
+
+static const struct sdio_device_id btmtksdio_table[] = {
+ {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663),
+ .driver_data = (kernel_ulong_t)&mt7663_data },
+ {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668),
+ .driver_data = (kernel_ulong_t)&mt7668_data },
+ {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7961),
+ .driver_data = (kernel_ulong_t)&mt7921_data },
+ { } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
+
+#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) /* For write */
+#define C_COM_DRV_OWN BIT(8) /* For read */
+#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)
+#define BT_RST_DONE BIT(8)
+
+/* 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 FW_MAILBOX_INT BIT(15)
+#define INT_MASK GENMASK(15, 0)
+#define RX_PKT_LEN GENMASK(31, 16)
+
+#define MTK_REG_CSICR 0xc0
+#define CSICR_CLR_MBOX_ACK BIT(0)
+#define MTK_REG_PH2DSM0R 0xc4
+#define PH2DSM0R_DRIVER_OWN BIT(0)
+#define MTK_REG_PD2HRM0R 0xdc
+#define PD2HRM0R_DRV_OWN BIT(0)
+
+#define MTK_REG_CTDR 0x18
+
+#define MTK_REG_CRDR 0x1c
+
+#define MTK_REG_CRPLR 0x24
+
+#define MTK_SDIO_BLOCK_SIZE 256
+
+#define BTMTKSDIO_TX_WAIT_VND_EVT 1
+#define BTMTKSDIO_HW_TX_READY 2
+#define BTMTKSDIO_FUNC_ENABLED 3
+#define BTMTKSDIO_PATCH_ENABLED 4
+#define BTMTKSDIO_HW_RESET_ACTIVE 5
+
+struct mtkbtsdio_hdr {
+ __le16 len;
+ __le16 reserved;
+ u8 bt_type;
+} __packed;
+
+struct btmtksdio_dev {
+ struct hci_dev *hdev;
+ struct sdio_func *func;
+ struct device *dev;
+
+ struct work_struct txrx_work;
+ unsigned long tx_state;
+ struct sk_buff_head txq;
+
+ struct sk_buff *evt_skb;
+
+ const struct btmtksdio_data *data;
+
+ struct gpio_desc *reset;
+};
+
+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;
+ struct btmtk_hci_wmt_evt_reg *wmt_evt_reg;
+ u32 hlen, status = BTMTK_WMT_INVALID;
+ struct btmtk_hci_wmt_evt *wmt_evt;
+ struct btmtk_hci_wmt_cmd *wc;
+ struct btmtk_wmt_hdr *hdr;
+ int err;
+
+ /* Send the WMT command and wait until the WMT event returns */
+ hlen = sizeof(*hdr) + wmt_params->dlen;
+ if (hlen > 255)
+ return -EINVAL;
+
+ wc = kzalloc(hlen, GFP_KERNEL);
+ if (!wc)
+ return -ENOMEM;
+
+ hdr = &wc->hdr;
+ 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);
+ goto err_free_wc;
+ }
+
+ /* 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);
+ goto err_free_wc;
+ }
+
+ if (err) {
+ bt_dev_err(hdev, "Execution of wmt command timed out");
+ clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
+ err = -ETIMEDOUT;
+ goto err_free_wc;
+ }
+
+ /* 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 BTMTK_WMT_SEMAPHORE:
+ if (wmt_evt->whdr.flag == 2)
+ status = BTMTK_WMT_PATCH_UNDONE;
+ else
+ status = BTMTK_WMT_PATCH_DONE;
+ break;
+ case BTMTK_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;
+ case BTMTK_WMT_PATCH_DWNLD:
+ if (wmt_evt->whdr.flag == 2)
+ status = BTMTK_WMT_PATCH_DONE;
+ else if (wmt_evt->whdr.flag == 1)
+ status = BTMTK_WMT_PATCH_PROGRESS;
+ else
+ status = BTMTK_WMT_PATCH_UNDONE;
+ break;
+ case BTMTK_WMT_REGISTER:
+ wmt_evt_reg = (struct btmtk_hci_wmt_evt_reg *)wmt_evt;
+ if (le16_to_cpu(wmt_evt->whdr.dlen) == 12)
+ status = le32_to_cpu(wmt_evt_reg->val);
+ break;
+ }
+
+ if (wmt_params->status)
+ *wmt_params->status = status;
+
+err_free_skb:
+ kfree_skb(bdev->evt_skb);
+ bdev->evt_skb = NULL;
+err_free_wc:
+ kfree(wc);
+
+ 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);
+
+ clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
+ 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 u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev)
+{
+ return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL);
+}
+
+static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev)
+{
+ return sdio_readl(bdev->func, MTK_REG_CHCR, NULL);
+}
+
+static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev)
+{
+ u32 status;
+ int err;
+
+ sdio_claim_host(bdev->func);
+
+ if (bdev->data->lp_mbox_supported &&
+ test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) {
+ sdio_writel(bdev->func, CSICR_CLR_MBOX_ACK, MTK_REG_CSICR,
+ &err);
+ err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
+ status, !(status & PD2HRM0R_DRV_OWN),
+ 2000, 1000000);
+ if (err < 0) {
+ bt_dev_err(bdev->hdev, "mailbox ACK not cleared");
+ goto out;
+ }
+ }
+
+ /* Return ownership to the device */
+ sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
+ if (err < 0)
+ goto out;
+
+ err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
+ !(status & C_COM_DRV_OWN), 2000, 1000000);
+
+out:
+ sdio_release_host(bdev->func);
+
+ if (err < 0)
+ bt_dev_err(bdev->hdev, "Cannot return ownership to device");
+
+ return err;
+}
+
+static int btmtksdio_drv_pmctrl(struct btmtksdio_dev *bdev)
+{
+ u32 status;
+ int err;
+
+ sdio_claim_host(bdev->func);
+
+ /* Get ownership from the device */
+ sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
+ if (err < 0)
+ goto out;
+
+ err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
+ status & C_COM_DRV_OWN, 2000, 1000000);
+
+ if (!err && bdev->data->lp_mbox_supported &&
+ test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state))
+ err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
+ status, status & PD2HRM0R_DRV_OWN,
+ 2000, 1000000);
+
+out:
+ sdio_release_host(bdev->func);
+
+ if (err < 0)
+ bt_dev_err(bdev->hdev, "Cannot get ownership from device");
+
+ return err;
+}
+
+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;
+ u8 evt = hdr->evt;
+ int err;
+
+ /* 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 (evt == HCI_EV_WMT) {
+ 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 int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+ u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
+
+ switch (handle) {
+ case 0xfc6f:
+ /* Firmware dump from device: when the firmware hangs, the
+ * device can no longer suspend and thus disable auto-suspend.
+ */
+ pm_runtime_forbid(bdev->dev);
+ fallthrough;
+ case 0x05ff:
+ case 0x05fe:
+ /* Firmware debug logging */
+ return hci_recv_diag(hdev, skb);
+ }
+
+ return hci_recv_frame(hdev, skb);
+}
+
+static const struct h4_recv_pkt mtk_recv_pkts[] = {
+ { H4_RECV_ACL, .recv = btmtksdio_recv_acl },
+ { 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;
+ 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;
+
+ 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);
+
+ bdev->hdev->stat.byte_rx += rx_size;
+
+ return 0;
+
+err_kfree_skb:
+ kfree_skb(skb);
+
+ return err;
+}
+
+static void btmtksdio_txrx_work(struct work_struct *work)
+{
+ struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
+ txrx_work);
+ unsigned long txrx_timeout;
+ u32 int_status, rx_size;
+ struct sk_buff *skb;
+ int err;
+
+ pm_runtime_get_sync(bdev->dev);
+
+ sdio_claim_host(bdev->func);
+
+ /* Disable interrupt */
+ sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
+
+ txrx_timeout = jiffies + 5 * HZ;
+
+ do {
+ int_status = sdio_readl(bdev->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(bdev->func, int_status, MTK_REG_CHISR, NULL);
+ int_status &= INT_MASK;
+
+ if ((int_status & FW_MAILBOX_INT) &&
+ bdev->data->chipid == 0x7921) {
+ sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN,
+ MTK_REG_PH2DSM0R, 0);
+ }
+
+ if (int_status & FW_OWN_BACK_INT)
+ bt_dev_dbg(bdev->hdev, "Get fw own back");
+
+ if (int_status & TX_EMPTY)
+ set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
+
+ else if (unlikely(int_status & TX_FIFO_OVERFLOW))
+ bt_dev_warn(bdev->hdev, "Tx fifo overflow");
+
+ if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) {
+ skb = skb_dequeue(&bdev->txq);
+ if (skb) {
+ err = btmtksdio_tx_packet(bdev, skb);
+ if (err < 0) {
+ bdev->hdev->stat.err_tx++;
+ skb_queue_head(&bdev->txq, skb);
+ }
+ }
+ }
+
+ if (int_status & RX_DONE_INT) {
+ rx_size = sdio_readl(bdev->func, MTK_REG_CRPLR, NULL);
+ rx_size = (rx_size & RX_PKT_LEN) >> 16;
+ if (btmtksdio_rx_packet(bdev, rx_size) < 0)
+ bdev->hdev->stat.err_rx++;
+ }
+ } while (int_status || time_is_before_jiffies(txrx_timeout));
+
+ /* Enable interrupt */
+ sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, 0);
+
+ sdio_release_host(bdev->func);
+
+ pm_runtime_mark_last_busy(bdev->dev);
+ pm_runtime_put_autosuspend(bdev->dev);
+}
+
+static void btmtksdio_interrupt(struct sdio_func *func)
+{
+ struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
+
+ /* Disable interrupt */
+ sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
+
+ schedule_work(&bdev->txrx_work);
+}
+
+static int btmtksdio_open(struct hci_dev *hdev)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+ u32 val;
+ int err;
+
+ sdio_claim_host(bdev->func);
+
+ err = sdio_enable_func(bdev->func);
+ if (err < 0)
+ goto err_release_host;
+
+ set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
+
+ err = btmtksdio_drv_pmctrl(bdev);
+ if (err < 0)
+ 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
+ */
+ val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err);
+ if (err < 0)
+ goto err_release_irq;
+
+ val |= SDIO_INT_CTL;
+ sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err);
+ if (err < 0)
+ goto err_release_irq;
+
+ /* Explitly set write-1-clear method */
+ val = sdio_readl(bdev->func, MTK_REG_CHCR, &err);
+ if (err < 0)
+ goto err_release_irq;
+
+ val |= C_INT_CLR_CTRL;
+ sdio_writel(bdev->func, val, 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);
+
+ sdio_claim_host(bdev->func);
+
+ /* Disable interrupt */
+ sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
+
+ sdio_release_irq(bdev->func);
+
+ cancel_work_sync(&bdev->txrx_work);
+
+ btmtksdio_fw_pmctrl(bdev);
+
+ clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
+ 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->txrx_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 = BTMTK_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 mt76xx_setup(struct hci_dev *hdev, const char *fwname)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+ struct btmtk_hci_wmt_params wmt_params;
+ struct btmtk_tci_sleep tci_sleep;
+ struct sk_buff *skb;
+ int err, status;
+ u8 param = 0x1;
+
+ /* Query whether the firmware is already download */
+ wmt_params.op = BTMTK_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 = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync);
+ 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 = BTMTK_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;
+ }
+
+ set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
+
+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);
+
+ return 0;
+}
+
+static int mt79xx_setup(struct hci_dev *hdev, const char *fwname)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+ struct btmtk_hci_wmt_params wmt_params;
+ u8 param = 0x1;
+ int err;
+
+ err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err);
+ return err;
+ }
+
+ err = btmtksdio_fw_pmctrl(bdev);
+ if (err < 0)
+ return err;
+
+ err = btmtksdio_drv_pmctrl(bdev);
+ if (err < 0)
+ return err;
+
+ /* Enable Bluetooth protocol */
+ wmt_params.op = BTMTK_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;
+ }
+
+ hci_set_msft_opcode(hdev, 0xFD30);
+ hci_set_aosp_capable(hdev);
+ set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
+
+ return err;
+}
+
+static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
+{
+ struct btmtk_hci_wmt_params wmt_params;
+ struct reg_read_cmd reg_read = {
+ .type = 1,
+ .num = 1,
+ };
+ u32 status;
+ int err;
+
+ reg_read.addr = cpu_to_le32(reg);
+ wmt_params.op = BTMTK_WMT_REGISTER;
+ wmt_params.flag = BTMTK_WMT_REG_READ;
+ wmt_params.dlen = sizeof(reg_read);
+ wmt_params.data = &reg_read;
+ wmt_params.status = &status;
+
+ err = mtk_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to read reg (%d)", err);
+ return err;
+ }
+
+ *val = status;
+
+ return err;
+}
+
+static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask)
+{
+ struct btmtk_hci_wmt_params wmt_params;
+ const struct reg_write_cmd reg_write = {
+ .type = 1,
+ .num = 1,
+ .addr = cpu_to_le32(reg),
+ .data = cpu_to_le32(val),
+ .mask = cpu_to_le32(mask),
+ };
+ int err, status;
+
+ wmt_params.op = BTMTK_WMT_REGISTER;
+ wmt_params.flag = BTMTK_WMT_REG_WRITE;
+ wmt_params.dlen = sizeof(reg_write);
+ wmt_params.data = &reg_write;
+ wmt_params.status = &status;
+
+ err = mtk_hci_wmt_sync(hdev, &wmt_params);
+ if (err < 0)
+ bt_dev_err(hdev, "Failed to write reg (%d)", err);
+
+ return err;
+}
+
+static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
+{
+ /* uses 1 as data path id for all the usecases */
+ *data_path_id = 1;
+ return 0;
+}
+
+static int btmtksdio_get_codec_config_data(struct hci_dev *hdev,
+ __u8 link, struct bt_codec *codec,
+ __u8 *ven_len, __u8 **ven_data)
+{
+ int err = 0;
+
+ if (!ven_data || !ven_len)
+ return -EINVAL;
+
+ *ven_len = 0;
+ *ven_data = NULL;
+
+ if (link != ESCO_LINK) {
+ bt_dev_err(hdev, "Invalid link type(%u)", link);
+ return -EINVAL;
+ }
+
+ *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL);
+ if (!*ven_data) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ /* supports only CVSD and mSBC offload codecs */
+ switch (codec->id) {
+ case 0x02:
+ **ven_data = 0x00;
+ break;
+ case 0x05:
+ **ven_data = 0x01;
+ break;
+ default:
+ err = -EINVAL;
+ bt_dev_err(hdev, "Invalid codec id(%u)", codec->id);
+ goto error;
+ }
+ /* codec and its capabilities are pre-defined to ids
+ * preset id = 0x00 represents CVSD codec with sampling rate 8K
+ * preset id = 0x01 represents mSBC codec with sampling rate 16K
+ */
+ *ven_len = sizeof(__u8);
+ return err;
+
+error:
+ kfree(*ven_data);
+ *ven_data = NULL;
+ return err;
+}
+
+static int btmtksdio_sco_setting(struct hci_dev *hdev)
+{
+ const struct btmtk_sco sco_setting = {
+ .clock_config = 0x49,
+ .channel_format_config = 0x80,
+ };
+ struct sk_buff *skb;
+ u32 val;
+ int err;
+
+ /* Enable SCO over I2S/PCM for MediaTek chipset */
+ skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting),
+ &sco_setting, HCI_CMD_TIMEOUT);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ kfree_skb(skb);
+
+ err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val);
+ if (err < 0)
+ return err;
+
+ val |= 0x11000000;
+ err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0);
+ if (err < 0)
+ return err;
+
+ err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
+ if (err < 0)
+ return err;
+
+ val |= 0x00000101;
+ err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
+ if (err < 0)
+ return err;
+
+ hdev->get_data_path_id = btmtksdio_get_data_path_id;
+ hdev->get_codec_config_data = btmtksdio_get_codec_config_data;
+
+ return err;
+}
+
+static int btmtksdio_reset_setting(struct hci_dev *hdev)
+{
+ int err;
+ u32 val;
+
+ err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
+ if (err < 0)
+ return err;
+
+ val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */
+ err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
+ if (err < 0)
+ return err;
+
+ err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val);
+ if (err < 0)
+ return err;
+
+ val |= MT7921_BTSYS_RST_WITH_GPIO;
+ return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0);
+}
+
+static int btmtksdio_setup(struct hci_dev *hdev)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+ ktime_t calltime, delta, rettime;
+ unsigned long long duration;
+ char fwname[64];
+ int err, dev_id;
+ u32 fw_version = 0, val;
+
+ calltime = ktime_get();
+ set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
+
+ switch (bdev->data->chipid) {
+ case 0x7921:
+ if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) {
+ err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS,
+ &val);
+ if (err < 0)
+ return err;
+
+ val &= ~BT_DL_STATE;
+ err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS,
+ val, ~0);
+ if (err < 0)
+ return err;
+
+ btmtksdio_fw_pmctrl(bdev);
+ msleep(20);
+ btmtksdio_drv_pmctrl(bdev);
+
+ clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state);
+ }
+
+ err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to get device id (%d)", err);
+ return err;
+ }
+
+ err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to get fw version (%d)", err);
+ return err;
+ }
+
+ snprintf(fwname, sizeof(fwname),
+ "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
+ dev_id & 0xffff, (fw_version & 0xff) + 1);
+ err = mt79xx_setup(hdev, fwname);
+ if (err < 0)
+ return err;
+
+ /* Enable SCO over I2S/PCM */
+ err = btmtksdio_sco_setting(hdev);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err);
+ return err;
+ }
+
+ /* Enable WBS with mSBC codec */
+ set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
+
+ /* Enable GPIO reset mechanism */
+ if (bdev->reset) {
+ err = btmtksdio_reset_setting(hdev);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err);
+ devm_gpiod_put(bdev->dev, bdev->reset);
+ bdev->reset = NULL;
+ }
+ }
+
+ /* Valid LE States quirk for MediaTek 7921 */
+ set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
+
+ break;
+ case 0x7663:
+ case 0x7668:
+ err = mt76xx_setup(hdev, bdev->data->fwname);
+ if (err < 0)
+ return err;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ rettime = ktime_get();
+ delta = ktime_sub(rettime, calltime);
+ duration = (unsigned long long)ktime_to_ns(delta) >> 10;
+
+ pm_runtime_set_autosuspend_delay(bdev->dev,
+ MTKBTSDIO_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(bdev->dev);
+
+ err = pm_runtime_set_active(bdev->dev);
+ if (err < 0)
+ return err;
+
+ /* Default forbid runtime auto suspend, that can be allowed by
+ * enable_autosuspend flag or the PM runtime entry under sysfs.
+ */
+ pm_runtime_forbid(bdev->dev);
+ pm_runtime_enable(bdev->dev);
+
+ if (enable_autosuspend)
+ pm_runtime_allow(bdev->dev);
+
+ bt_dev_info(hdev, "Device setup in %llu usecs", duration);
+
+ return 0;
+}
+
+static int btmtksdio_shutdown(struct hci_dev *hdev)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+ struct btmtk_hci_wmt_params wmt_params;
+ u8 param = 0x0;
+ int err;
+
+ /* Get back the state to be consistent with the state
+ * in btmtksdio_setup.
+ */
+ pm_runtime_get_sync(bdev->dev);
+
+ /* wmt command only works until the reset is complete */
+ if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
+ goto ignore_wmt_cmd;
+
+ /* Disable the device */
+ wmt_params.op = BTMTK_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_wmt_cmd:
+ pm_runtime_put_noidle(bdev->dev);
+ pm_runtime_disable(bdev->dev);
+
+ 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->txrx_work);
+
+ return 0;
+}
+
+static void btmtksdio_cmd_timeout(struct hci_dev *hdev)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+ u32 status;
+ int err;
+
+ if (!bdev->reset || bdev->data->chipid != 0x7921)
+ return;
+
+ pm_runtime_get_sync(bdev->dev);
+
+ if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
+ return;
+
+ sdio_claim_host(bdev->func);
+
+ sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
+ skb_queue_purge(&bdev->txq);
+ cancel_work_sync(&bdev->txrx_work);
+
+ gpiod_set_value_cansleep(bdev->reset, 1);
+ msleep(100);
+ gpiod_set_value_cansleep(bdev->reset, 0);
+
+ err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status,
+ status & BT_RST_DONE, 100000, 2000000);
+ if (err < 0) {
+ bt_dev_err(hdev, "Failed to reset (%d)", err);
+ goto err;
+ }
+
+ clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
+err:
+ sdio_release_host(bdev->func);
+
+ pm_runtime_put_noidle(bdev->dev);
+ pm_runtime_disable(bdev->dev);
+
+ hci_reset_dev(hdev);
+}
+
+static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
+{
+ struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+
+ return device_may_wakeup(bdev->dev);
+}
+
+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;
+ else
+ kfree_skb(skb);
+ }
+
+ return may_wakeup;
+}
+
+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->dev = &func->dev;
+ bdev->func = func;
+
+ INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_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->cmd_timeout = btmtksdio_cmd_timeout;
+ hdev->flush = btmtksdio_flush;
+ hdev->setup = btmtksdio_setup;
+ hdev->shutdown = btmtksdio_shutdown;
+ hdev->send = btmtksdio_send_frame;
+ hdev->wakeup = btmtksdio_sdio_wakeup;
+ /*
+ * If SDIO controller supports wake on Bluetooth, sending a wakeon
+ * command is not necessary.
+ */
+ if (device_can_wakeup(func->card->host->parent))
+ hdev->wakeup = btmtksdio_sdio_inband_wakeup;
+ else
+ hdev->wakeup = btmtksdio_sdio_wakeup;
+ hdev->set_bdaddr = btmtk_set_bdaddr;
+
+ SET_HCIDEV_DEV(hdev, &func->dev);
+
+ hdev->manufacturer = 70;
+ set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
+
+ sdio_set_drvdata(func, bdev);
+
+ err = hci_register_dev(hdev);
+ if (err < 0) {
+ dev_err(&func->dev, "Can't register HCI device\n");
+ hci_free_dev(hdev);
+ return err;
+ }
+
+ /* pm_runtime_enable would be done after the firmware is being
+ * downloaded because the core layer probably already enables
+ * runtime PM for this func such as the case host->caps &
+ * MMC_CAP_POWER_OFF_CARD.
+ */
+ if (pm_runtime_enabled(bdev->dev))
+ pm_runtime_disable(bdev->dev);
+
+ /* As explaination in drivers/mmc/core/sdio_bus.c tells us:
+ * Unbound SDIO functions are always suspended.
+ * During probe, the function is set active and the usage count
+ * is incremented. If the driver supports runtime PM,
+ * it should call pm_runtime_put_noidle() in its probe routine and
+ * pm_runtime_get_noresume() in its remove routine.
+ *
+ * So, put a pm_runtime_put_noidle here !
+ */
+ pm_runtime_put_noidle(bdev->dev);
+
+ err = device_init_wakeup(bdev->dev, true);
+ if (err)
+ bt_dev_err(hdev, "failed to initialize device wakeup");
+
+ bdev->dev->of_node = of_find_compatible_node(NULL, NULL,
+ "mediatek,mt7921s-bluetooth");
+ bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(bdev->reset))
+ err = PTR_ERR(bdev->reset);
+
+ return err;
+}
+
+static void btmtksdio_remove(struct sdio_func *func)
+{
+ struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
+ struct hci_dev *hdev;
+
+ if (!bdev)
+ return;
+
+ /* Be consistent the state in btmtksdio_probe */
+ pm_runtime_get_noresume(bdev->dev);
+
+ hdev = bdev->hdev;
+
+ sdio_set_drvdata(func, NULL);
+ hci_unregister_dev(hdev);
+ hci_free_dev(hdev);
+}
+
+#ifdef CONFIG_PM
+static int btmtksdio_runtime_suspend(struct device *dev)
+{
+ struct sdio_func *func = dev_to_sdio_func(dev);
+ struct btmtksdio_dev *bdev;
+ int err;
+
+ bdev = sdio_get_drvdata(func);
+ if (!bdev)
+ return 0;
+
+ if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
+ return 0;
+
+ sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
+
+ err = btmtksdio_fw_pmctrl(bdev);
+
+ bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err);
+
+ return err;
+}
+
+static int btmtksdio_runtime_resume(struct device *dev)
+{
+ struct sdio_func *func = dev_to_sdio_func(dev);
+ struct btmtksdio_dev *bdev;
+ int err;
+
+ bdev = sdio_get_drvdata(func);
+ if (!bdev)
+ return 0;
+
+ if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
+ return 0;
+
+ err = btmtksdio_drv_pmctrl(bdev);
+
+ bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err);
+
+ return err;
+}
+
+static UNIVERSAL_DEV_PM_OPS(btmtksdio_pm_ops, btmtksdio_runtime_suspend,
+ btmtksdio_runtime_resume, NULL);
+#define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
+#else /* CONFIG_PM */
+#define BTMTKSDIO_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+static struct sdio_driver btmtksdio_driver = {
+ .name = "btmtksdio",
+ .probe = btmtksdio_probe,
+ .remove = btmtksdio_remove,
+ .id_table = btmtksdio_table,
+ .drv = {
+ .owner = THIS_MODULE,
+ .pm = BTMTKSDIO_PM_OPS,
+ }
+};
+
+module_sdio_driver(btmtksdio_driver);
+
+module_param(enable_autosuspend, bool, 0644);
+MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
+
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
+MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");