forked from luck/tmp_suning_uos_patched
Bluetooth: mediatek: Add protocol support for MediaTek serial devices
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 <sean.wang@mediatek.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Sean Wang
Marcel Holtmann
parent
819731596a
commit
7237c4c9ec
|
|
@ -365,6 +365,17 @@ config BT_WILINK
|
|||
Say Y here to compile support for Texas Instrument's WiLink7 driver
|
||||
into the kernel or say M to compile it as module (btwilink).
|
||||
|
||||
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_QCOMSMD
|
||||
tristate "Qualcomm SMD based HCI support"
|
||||
depends on RPMSG || (COMPILE_TEST && RPMSG=n)
|
||||
|
|
|
|||
|
|
@ -20,6 +20,7 @@ obj-$(CONFIG_BT_ATH3K) += ath3k.o
|
|||
obj-$(CONFIG_BT_MRVL) += btmrvl.o
|
||||
obj-$(CONFIG_BT_MRVL_SDIO) += btmrvl_sdio.o
|
||||
obj-$(CONFIG_BT_WILINK) += btwilink.o
|
||||
obj-$(CONFIG_BT_MTKUART) += btmtkuart.o
|
||||
obj-$(CONFIG_BT_QCOMSMD) += btqcomsmd.o
|
||||
obj-$(CONFIG_BT_BCM) += btbcm.o
|
||||
obj-$(CONFIG_BT_RTL) += btrtl.o
|
||||
|
|
|
|||
629
drivers/bluetooth/btmtkuart.c
Normal file
629
drivers/bluetooth/btmtkuart.c
Normal file
|
|
@ -0,0 +1,629 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
// Copyright (c) 2018 MediaTek Inc.
|
||||
|
||||
/*
|
||||
* Bluetooth support for MediaTek serial devices
|
||||
*
|
||||
* Author: Sean Wang <sean.wang@mediatek.com>
|
||||
*
|
||||
*/
|
||||
|
||||
#include <asm/unaligned.h>
|
||||
#include <linux/atomic.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/firmware.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/pm_runtime.h>
|
||||
#include <linux/serdev.h>
|
||||
#include <linux/skbuff.h>
|
||||
|
||||
#include <net/bluetooth/bluetooth.h>
|
||||
#include <net/bluetooth/hci_core.h>
|
||||
|
||||
#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
|
||||
#define BTMTKUART_TX_WAIT_VND_EVT 3
|
||||
|
||||
enum {
|
||||
MTK_WMT_PATCH_DWNLD = 0x1,
|
||||
MTK_WMT_FUNC_CTRL = 0x6,
|
||||
MTK_WMT_RST = 0x7
|
||||
};
|
||||
|
||||
struct mtk_stp_hdr {
|
||||
u8 prefix;
|
||||
__be16 dlen;
|
||||
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 btmtkuart_dev *bdev = hci_get_drvdata(hdev);
|
||||
struct mtk_hci_wmt_cmd wc;
|
||||
struct mtk_wmt_hdr *hdr;
|
||||
u32 hlen;
|
||||
int err;
|
||||
|
||||
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);
|
||||
|
||||
set_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state);
|
||||
|
||||
err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
|
||||
if (err < 0) {
|
||||
clear_bit(BTMTKUART_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 BTMTKUART_TX_WAIT_VND_EVT
|
||||
* state to be cleared. The driver speicfic event receive routine
|
||||
* will clear that state and with that indicate completion of the
|
||||
* WMT command.
|
||||
*/
|
||||
err = wait_on_bit_timeout(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT,
|
||||
TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
|
||||
if (err == -EINTR) {
|
||||
bt_dev_err(hdev, "Execution of wmt command interrupted");
|
||||
return err;
|
||||
}
|
||||
|
||||
if (err) {
|
||||
bt_dev_err(hdev, "Execution of wmt command timed out");
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
|
||||
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 device 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) {
|
||||
bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
|
||||
err);
|
||||
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 btmtkuart_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;
|
||||
|
||||
err = hci_recv_frame(hdev, skb);
|
||||
|
||||
if (hdr->evt == HCI_EV_VENDOR) {
|
||||
if (test_and_clear_bit(BTMTKUART_TX_WAIT_VND_EVT,
|
||||
&bdev->tx_state)) {
|
||||
/* Barrier to sync with other CPUs */
|
||||
smp_mb__after_atomic();
|
||||
wake_up_bit(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT);
|
||||
}
|
||||
}
|
||||
|
||||
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 = 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 = be16_to_cpu(shdr->dlen) & 0x0fff;
|
||||
|
||||
/* 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;
|
||||
}
|
||||
|
||||
bdev->stp_cursor = 2;
|
||||
bdev->stp_dlen = 0;
|
||||
|
||||
dev = &bdev->serdev->dev;
|
||||
|
||||
/* 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 function the firmware providing to */
|
||||
err = mtk_hci_wmt_sync(hdev, MTK_WMT_RST, 0x4, 0, 0);
|
||||
if (err < 0) {
|
||||
bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
/* Enable Bluetooth protocol */
|
||||
err = mtk_hci_wmt_sync(hdev, MTK_WMT_FUNC_CTRL, 0x0, sizeof(param),
|
||||
¶m);
|
||||
if (err < 0) {
|
||||
bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
|
||||
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);
|
||||
if (err < 0) {
|
||||
bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
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, type = 0;
|
||||
|
||||
/* Prepend skb with frame type */
|
||||
memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
|
||||
|
||||
/* 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 */
|
||||
dlen = skb->len;
|
||||
shdr = skb_push(skb, sizeof(*shdr));
|
||||
shdr->prefix = 0x80;
|
||||
shdr->dlen = cpu_to_be16((dlen & 0x0fff) | (type << 12));
|
||||
shdr->cs = 0; /* MT7622 doesn't care about checksum value */
|
||||
|
||||
/* 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 <sean.wang@mediatek.com>");
|
||||
MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION);
|
||||
MODULE_VERSION(VERSION);
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_FIRMWARE(FIRMWARE_MT7622);
|
||||
Loading…
Reference in New Issue
Block a user