// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2018 MediaTek Inc.
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|
/*
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* Bluetooth support for MediaTek serial devices
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*
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* Author: Sean Wang <sean.wang@mediatek.com>
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*
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*/
|
|
#include <asm/unaligned.h>
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#include <linux/atomic.h>
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#include <linux/clk.h>
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#include <linux/firmware.h>
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#include <linux/gpio/consumer.h>
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#include <linux/iopoll.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include <linux/serdev.h>
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#include <linux/skbuff.h>
|
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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|
#include "h4_recv.h"
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|
#define VERSION "0.2"
|
|
#define FIRMWARE_MT7622 "mediatek/mt7622pr2h.bin"
|
#define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin"
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#define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin"
|
|
#define MTK_STP_TLR_SIZE 2
|
|
#define BTMTKUART_TX_STATE_ACTIVE 1
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#define BTMTKUART_TX_STATE_WAKEUP 2
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#define BTMTKUART_TX_WAIT_VND_EVT 3
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#define BTMTKUART_REQUIRED_WAKEUP 4
|
|
#define BTMTKUART_FLAG_STANDALONE_HW BIT(0)
|
|
enum {
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MTK_WMT_PATCH_DWNLD = 0x1,
|
MTK_WMT_TEST = 0x2,
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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 mtk_stp_hdr {
|
u8 prefix;
|
__be16 dlen;
|
u8 cs;
|
} __packed;
|
|
struct btmtkuart_data {
|
unsigned int flags;
|
const char *fwname;
|
};
|
|
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 {
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struct btmtk_hci_wmt_evt hwhdr;
|
__be16 status;
|
} __packed;
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|
struct btmtk_tci_sleep {
|
u8 mode;
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__le16 duration;
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__le16 host_duration;
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u8 host_wakeup_pin;
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u8 time_compensation;
|
} __packed;
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struct btmtk_hci_wmt_params {
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u8 op;
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u8 flag;
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u16 dlen;
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const void *data;
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u32 *status;
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};
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|
struct btmtkuart_dev {
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struct hci_dev *hdev;
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struct serdev_device *serdev;
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|
struct clk *clk;
|
struct clk *osc;
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struct regulator *vcc;
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struct gpio_desc *reset;
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struct gpio_desc *boot;
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struct pinctrl *pinctrl;
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struct pinctrl_state *pins_runtime;
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struct pinctrl_state *pins_boot;
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speed_t desired_speed;
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speed_t curr_speed;
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struct work_struct tx_work;
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unsigned long tx_state;
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struct sk_buff_head txq;
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struct sk_buff *rx_skb;
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struct sk_buff *evt_skb;
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|
u8 stp_pad[6];
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u8 stp_cursor;
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u16 stp_dlen;
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|
const struct btmtkuart_data *data;
|
};
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#define btmtkuart_is_standalone(bdev) \
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((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
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#define btmtkuart_is_builtin_soc(bdev) \
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!((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
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static int mtk_hci_wmt_sync(struct hci_dev *hdev,
|
struct btmtk_hci_wmt_params *wmt_params)
|
{
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struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
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struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
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u32 hlen, status = BTMTK_WMT_INVALID;
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struct btmtk_hci_wmt_evt *wmt_evt;
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struct mtk_hci_wmt_cmd wc;
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struct mtk_wmt_hdr *hdr;
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int err;
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hlen = sizeof(*hdr) + wmt_params->dlen;
|
if (hlen > 255) {
|
err = -EINVAL;
|
goto err_free_skb;
|
}
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|
hdr = (struct mtk_wmt_hdr *)&wc;
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hdr->dir = 1;
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hdr->op = wmt_params->op;
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hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
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hdr->flag = wmt_params->flag;
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memcpy(wc.data, wmt_params->data, wmt_params->dlen);
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|
set_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state);
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|
err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
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if (err < 0) {
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clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state);
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goto err_free_skb;
|
}
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|
/* 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.
|
*
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* After sending the command, wait for BTMTKUART_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.
|
*/
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err = wait_on_bit_timeout(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT,
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TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
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if (err == -EINTR) {
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bt_dev_err(hdev, "Execution of wmt command interrupted");
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clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state);
|
goto err_free_skb;
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}
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|
if (err) {
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bt_dev_err(hdev, "Execution of wmt command timed out");
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clear_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state);
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err = -ETIMEDOUT;
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goto err_free_skb;
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}
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/* Parse and handle the return WMT event */
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wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
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if (wmt_evt->whdr.op != hdr->op) {
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bt_dev_err(hdev, "Wrong op received %d expected %d",
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wmt_evt->whdr.op, hdr->op);
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err = -EIO;
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goto err_free_skb;
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}
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switch (wmt_evt->whdr.op) {
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case MTK_WMT_SEMAPHORE:
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if (wmt_evt->whdr.flag == 2)
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status = BTMTK_WMT_PATCH_UNDONE;
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else
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status = BTMTK_WMT_PATCH_DONE;
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break;
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case MTK_WMT_FUNC_CTRL:
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wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
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if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
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status = BTMTK_WMT_ON_DONE;
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else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
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status = BTMTK_WMT_ON_PROGRESS;
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else
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status = BTMTK_WMT_ON_UNDONE;
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break;
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}
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if (wmt_params->status)
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*wmt_params->status = status;
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err_free_skb:
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kfree_skb(bdev->evt_skb);
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bdev->evt_skb = NULL;
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return err;
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}
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static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
|
{
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struct btmtk_hci_wmt_params wmt_params;
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const struct firmware *fw;
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const u8 *fw_ptr;
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size_t fw_size;
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int err, dlen;
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u8 flag;
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err = request_firmware(&fw, fwname, &hdev->dev);
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if (err < 0) {
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bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
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return err;
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}
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fw_ptr = fw->data;
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fw_size = fw->size;
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/* The size of patch header is 30 bytes, should be skip */
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if (fw_size < 30) {
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err = -EINVAL;
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goto free_fw;
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}
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fw_size -= 30;
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fw_ptr += 30;
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flag = 1;
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wmt_params.op = MTK_WMT_PATCH_DWNLD;
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wmt_params.status = NULL;
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while (fw_size > 0) {
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dlen = min_t(int, 250, fw_size);
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/* Tell device the position in sequence */
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if (fw_size - dlen <= 0)
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flag = 3;
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else if (fw_size < fw->size - 30)
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flag = 2;
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wmt_params.flag = flag;
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wmt_params.dlen = dlen;
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wmt_params.data = fw_ptr;
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err = mtk_hci_wmt_sync(hdev, &wmt_params);
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if (err < 0) {
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bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
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err);
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goto free_fw;
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}
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fw_size -= dlen;
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fw_ptr += dlen;
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}
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wmt_params.op = MTK_WMT_RST;
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wmt_params.flag = 4;
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wmt_params.dlen = 0;
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wmt_params.data = NULL;
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wmt_params.status = NULL;
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/* Activate funciton the firmware providing to */
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err = mtk_hci_wmt_sync(hdev, &wmt_params);
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if (err < 0) {
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bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
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goto free_fw;
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}
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/* Wait a few moments for firmware activation done */
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usleep_range(10000, 12000);
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free_fw:
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release_firmware(fw);
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return err;
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}
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static int btmtkuart_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
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struct hci_event_hdr *hdr = (void *)skb->data;
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int err;
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/* Fix up the vendor event id with 0xff for vendor specific instead
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* of 0xe4 so that event send via monitoring socket can be parsed
|
* properly.
|
*/
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if (hdr->evt == 0xe4)
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hdr->evt = HCI_EV_VENDOR;
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/* When someone waits for the WMT event, the skb is being cloned
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* and being processed the events from there then.
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*/
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if (test_bit(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state)) {
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bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
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if (!bdev->evt_skb) {
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err = -ENOMEM;
|
goto err_out;
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}
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}
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err = hci_recv_frame(hdev, skb);
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if (err < 0)
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goto err_free_skb;
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if (hdr->evt == HCI_EV_VENDOR) {
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if (test_and_clear_bit(BTMTKUART_TX_WAIT_VND_EVT,
|
&bdev->tx_state)) {
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/* Barrier to sync with other CPUs */
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smp_mb__after_atomic();
|
wake_up_bit(&bdev->tx_state, BTMTKUART_TX_WAIT_VND_EVT);
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}
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}
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return 0;
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|
err_free_skb:
|
kfree_skb(bdev->evt_skb);
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bdev->evt_skb = NULL;
|
|
err_out:
|
return err;
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}
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static const struct h4_recv_pkt mtk_recv_pkts[] = {
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{ H4_RECV_ACL, .recv = hci_recv_frame },
|
{ H4_RECV_SCO, .recv = hci_recv_frame },
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{ H4_RECV_EVENT, .recv = btmtkuart_recv_event },
|
};
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|
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,
|
ARRAY_SIZE(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;
|
}
|
|
if (btmtkuart_is_standalone(bdev)) {
|
if (bdev->curr_speed != bdev->desired_speed)
|
err = serdev_device_set_baudrate(bdev->serdev,
|
115200);
|
else
|
err = serdev_device_set_baudrate(bdev->serdev,
|
bdev->desired_speed);
|
|
if (err < 0) {
|
bt_dev_err(hdev, "Unable to set baudrate UART device %s",
|
dev_name(&bdev->serdev->dev));
|
goto err_serdev_close;
|
}
|
|
serdev_device_set_flow_control(bdev->serdev, false);
|
}
|
|
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_serdev_close:
|
serdev_device_close(bdev->serdev);
|
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_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 = ¶m;
|
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 btmtkuart_change_baudrate(struct hci_dev *hdev)
|
{
|
struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
|
struct btmtk_hci_wmt_params wmt_params;
|
__le32 baudrate;
|
u8 param;
|
int err;
|
|
/* Indicate the device to enter the probe state the host is
|
* ready to change a new baudrate.
|
*/
|
baudrate = cpu_to_le32(bdev->desired_speed);
|
wmt_params.op = MTK_WMT_HIF;
|
wmt_params.flag = 1;
|
wmt_params.dlen = 4;
|
wmt_params.data = &baudrate;
|
wmt_params.status = NULL;
|
|
err = mtk_hci_wmt_sync(hdev, &wmt_params);
|
if (err < 0) {
|
bt_dev_err(hdev, "Failed to device baudrate (%d)", err);
|
return err;
|
}
|
|
err = serdev_device_set_baudrate(bdev->serdev,
|
bdev->desired_speed);
|
if (err < 0) {
|
bt_dev_err(hdev, "Failed to set up host baudrate (%d)",
|
err);
|
return err;
|
}
|
|
serdev_device_set_flow_control(bdev->serdev, false);
|
|
/* Send a dummy byte 0xff to activate the new baudrate */
|
param = 0xff;
|
err = serdev_device_write_buf(bdev->serdev, ¶m, sizeof(param));
|
if (err < 0 || err < sizeof(param))
|
return err;
|
|
serdev_device_wait_until_sent(bdev->serdev, 0);
|
|
/* Wait some time for the device changing baudrate done */
|
usleep_range(20000, 22000);
|
|
/* Test the new baudrate */
|
wmt_params.op = MTK_WMT_TEST;
|
wmt_params.flag = 7;
|
wmt_params.dlen = 0;
|
wmt_params.data = NULL;
|
wmt_params.status = NULL;
|
|
err = mtk_hci_wmt_sync(hdev, &wmt_params);
|
if (err < 0) {
|
bt_dev_err(hdev, "Failed to test new baudrate (%d)",
|
err);
|
return err;
|
}
|
|
bdev->curr_speed = bdev->desired_speed;
|
|
return 0;
|
}
|
|
static int btmtkuart_setup(struct hci_dev *hdev)
|
{
|
struct btmtkuart_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();
|
|
/* Wakeup MCUSYS is required for certain devices before we start to
|
* do any setups.
|
*/
|
if (test_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state)) {
|
wmt_params.op = MTK_WMT_WAKEUP;
|
wmt_params.flag = 3;
|
wmt_params.dlen = 0;
|
wmt_params.data = NULL;
|
wmt_params.status = NULL;
|
|
err = mtk_hci_wmt_sync(hdev, &wmt_params);
|
if (err < 0) {
|
bt_dev_err(hdev, "Failed to wakeup the chip (%d)", err);
|
return err;
|
}
|
|
clear_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state);
|
}
|
|
if (btmtkuart_is_standalone(bdev))
|
btmtkuart_change_baudrate(hdev);
|
|
/* 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(btmtkuart_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 = ¶m;
|
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 btmtkuart_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 = ¶m;
|
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 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_parse_dt(struct serdev_device *serdev)
|
{
|
struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
|
struct device_node *node = serdev->dev.of_node;
|
u32 speed = 921600;
|
int err;
|
|
if (btmtkuart_is_standalone(bdev)) {
|
of_property_read_u32(node, "current-speed", &speed);
|
|
bdev->desired_speed = speed;
|
|
bdev->vcc = devm_regulator_get(&serdev->dev, "vcc");
|
if (IS_ERR(bdev->vcc)) {
|
err = PTR_ERR(bdev->vcc);
|
return err;
|
}
|
|
bdev->osc = devm_clk_get_optional(&serdev->dev, "osc");
|
if (IS_ERR(bdev->osc)) {
|
err = PTR_ERR(bdev->osc);
|
return err;
|
}
|
|
bdev->boot = devm_gpiod_get_optional(&serdev->dev, "boot",
|
GPIOD_OUT_LOW);
|
if (IS_ERR(bdev->boot)) {
|
err = PTR_ERR(bdev->boot);
|
return err;
|
}
|
|
bdev->pinctrl = devm_pinctrl_get(&serdev->dev);
|
if (IS_ERR(bdev->pinctrl)) {
|
err = PTR_ERR(bdev->pinctrl);
|
return err;
|
}
|
|
bdev->pins_boot = pinctrl_lookup_state(bdev->pinctrl,
|
"default");
|
if (IS_ERR(bdev->pins_boot) && !bdev->boot) {
|
err = PTR_ERR(bdev->pins_boot);
|
dev_err(&serdev->dev,
|
"Should assign RXD to LOW at boot stage\n");
|
return err;
|
}
|
|
bdev->pins_runtime = pinctrl_lookup_state(bdev->pinctrl,
|
"runtime");
|
if (IS_ERR(bdev->pins_runtime)) {
|
err = PTR_ERR(bdev->pins_runtime);
|
return err;
|
}
|
|
bdev->reset = devm_gpiod_get_optional(&serdev->dev, "reset",
|
GPIOD_OUT_LOW);
|
if (IS_ERR(bdev->reset)) {
|
err = PTR_ERR(bdev->reset);
|
return err;
|
}
|
} else if (btmtkuart_is_builtin_soc(bdev)) {
|
bdev->clk = devm_clk_get(&serdev->dev, "ref");
|
if (IS_ERR(bdev->clk))
|
return PTR_ERR(bdev->clk);
|
}
|
|
return 0;
|
}
|
|
static int btmtkuart_probe(struct serdev_device *serdev)
|
{
|
struct btmtkuart_dev *bdev;
|
struct hci_dev *hdev;
|
int err;
|
|
bdev = devm_kzalloc(&serdev->dev, sizeof(*bdev), GFP_KERNEL);
|
if (!bdev)
|
return -ENOMEM;
|
|
bdev->data = of_device_get_match_data(&serdev->dev);
|
if (!bdev->data)
|
return -ENODEV;
|
|
bdev->serdev = serdev;
|
serdev_device_set_drvdata(serdev, bdev);
|
|
serdev_device_set_client_ops(serdev, &btmtkuart_client_ops);
|
|
err = btmtkuart_parse_dt(serdev);
|
if (err < 0)
|
return err;
|
|
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 (btmtkuart_is_standalone(bdev)) {
|
err = clk_prepare_enable(bdev->osc);
|
if (err < 0)
|
goto err_hci_free_dev;
|
|
if (bdev->boot) {
|
gpiod_set_value_cansleep(bdev->boot, 1);
|
} else {
|
/* Switch to the specific pin state for the booting
|
* requires.
|
*/
|
pinctrl_select_state(bdev->pinctrl, bdev->pins_boot);
|
}
|
|
/* Power on */
|
err = regulator_enable(bdev->vcc);
|
if (err < 0)
|
goto err_clk_disable_unprepare;
|
|
/* Reset if the reset-gpios is available otherwise the board
|
* -level design should be guaranteed.
|
*/
|
if (bdev->reset) {
|
gpiod_set_value_cansleep(bdev->reset, 1);
|
usleep_range(1000, 2000);
|
gpiod_set_value_cansleep(bdev->reset, 0);
|
}
|
|
/* Wait some time until device got ready and switch to the pin
|
* mode the device requires for UART transfers.
|
*/
|
msleep(50);
|
|
if (bdev->boot)
|
devm_gpiod_put(&serdev->dev, bdev->boot);
|
|
pinctrl_select_state(bdev->pinctrl, bdev->pins_runtime);
|
|
/* A standalone device doesn't depends on power domain on SoC,
|
* so mark it as no callbacks.
|
*/
|
pm_runtime_no_callbacks(&serdev->dev);
|
|
set_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state);
|
}
|
|
err = hci_register_dev(hdev);
|
if (err < 0) {
|
dev_err(&serdev->dev, "Can't register HCI device\n");
|
goto err_regulator_disable;
|
}
|
|
return 0;
|
|
err_regulator_disable:
|
if (btmtkuart_is_standalone(bdev))
|
regulator_disable(bdev->vcc);
|
err_clk_disable_unprepare:
|
if (btmtkuart_is_standalone(bdev))
|
clk_disable_unprepare(bdev->osc);
|
err_hci_free_dev:
|
hci_free_dev(hdev);
|
|
return err;
|
}
|
|
static void btmtkuart_remove(struct serdev_device *serdev)
|
{
|
struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
|
struct hci_dev *hdev = bdev->hdev;
|
|
if (btmtkuart_is_standalone(bdev)) {
|
regulator_disable(bdev->vcc);
|
clk_disable_unprepare(bdev->osc);
|
}
|
|
hci_unregister_dev(hdev);
|
hci_free_dev(hdev);
|
}
|
|
static const struct btmtkuart_data mt7622_data = {
|
.fwname = FIRMWARE_MT7622,
|
};
|
|
static const struct btmtkuart_data mt7663_data = {
|
.flags = BTMTKUART_FLAG_STANDALONE_HW,
|
.fwname = FIRMWARE_MT7663,
|
};
|
|
static const struct btmtkuart_data mt7668_data = {
|
.flags = BTMTKUART_FLAG_STANDALONE_HW,
|
.fwname = FIRMWARE_MT7668,
|
};
|
|
#ifdef CONFIG_OF
|
static const struct of_device_id mtk_of_match_table[] = {
|
{ .compatible = "mediatek,mt7622-bluetooth", .data = &mt7622_data},
|
{ .compatible = "mediatek,mt7663u-bluetooth", .data = &mt7663_data},
|
{ .compatible = "mediatek,mt7668u-bluetooth", .data = &mt7668_data},
|
{ }
|
};
|
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);
|
MODULE_FIRMWARE(FIRMWARE_MT7663);
|
MODULE_FIRMWARE(FIRMWARE_MT7668);
|
