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7f3c563c57
Add runtime PM support to btmtksdio. With this way, there will be the benefit of the device entering the more power saving state once it is been a while data traffic is idle. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
1102 lines
25 KiB
C
1102 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019 MediaTek Inc.
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/*
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* Bluetooth support for MediaTek SDIO devices
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*
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* This file is written based on btsdio.c and btmtkuart.c.
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*
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* Author: Sean Wang <sean.wang@mediatek.com>
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*
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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/firmware.h>
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#include <linux/init.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/pm_runtime.h>
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#include <linux/skbuff.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/sdio_ids.h>
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#include <linux/mmc/sdio_func.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 "0.1"
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#define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin"
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#define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin"
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#define MTKBTSDIO_AUTOSUSPEND_DELAY 8000
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static bool enable_autosuspend;
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struct btmtksdio_data {
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const char *fwname;
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};
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static const struct btmtksdio_data mt7663_data = {
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.fwname = FIRMWARE_MT7663,
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};
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static const struct btmtksdio_data mt7668_data = {
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.fwname = FIRMWARE_MT7668,
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};
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static const struct sdio_device_id btmtksdio_table[] = {
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{SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7663),
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.driver_data = (kernel_ulong_t)&mt7663_data },
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{SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7668),
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.driver_data = (kernel_ulong_t)&mt7668_data },
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{ } /* Terminating entry */
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};
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#define MTK_REG_CHLPCR 0x4 /* W1S */
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#define C_INT_EN_SET BIT(0)
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#define C_INT_EN_CLR BIT(1)
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#define C_FW_OWN_REQ_SET BIT(8) /* For write */
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#define C_COM_DRV_OWN BIT(8) /* For read */
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#define C_FW_OWN_REQ_CLR BIT(9)
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#define MTK_REG_CSDIOCSR 0x8
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#define SDIO_RE_INIT_EN BIT(0)
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#define SDIO_INT_CTL BIT(2)
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#define MTK_REG_CHCR 0xc
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#define C_INT_CLR_CTRL BIT(1)
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/* CHISR have the same bits field definition with CHIER */
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#define MTK_REG_CHISR 0x10
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#define MTK_REG_CHIER 0x14
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#define FW_OWN_BACK_INT BIT(0)
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#define RX_DONE_INT BIT(1)
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#define TX_EMPTY BIT(2)
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#define TX_FIFO_OVERFLOW BIT(8)
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#define RX_PKT_LEN GENMASK(31, 16)
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#define MTK_REG_CTDR 0x18
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#define MTK_REG_CRDR 0x1c
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#define MTK_SDIO_BLOCK_SIZE 256
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#define BTMTKSDIO_TX_WAIT_VND_EVT 1
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enum {
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MTK_WMT_PATCH_DWNLD = 0x1,
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MTK_WMT_TEST = 0x2,
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MTK_WMT_WAKEUP = 0x3,
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MTK_WMT_HIF = 0x4,
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MTK_WMT_FUNC_CTRL = 0x6,
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MTK_WMT_RST = 0x7,
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MTK_WMT_SEMAPHORE = 0x17,
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};
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enum {
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BTMTK_WMT_INVALID,
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BTMTK_WMT_PATCH_UNDONE,
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BTMTK_WMT_PATCH_DONE,
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BTMTK_WMT_ON_UNDONE,
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BTMTK_WMT_ON_DONE,
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BTMTK_WMT_ON_PROGRESS,
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};
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struct mtkbtsdio_hdr {
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__le16 len;
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__le16 reserved;
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u8 bt_type;
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} __packed;
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struct mtk_wmt_hdr {
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u8 dir;
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u8 op;
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__le16 dlen;
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u8 flag;
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} __packed;
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struct mtk_hci_wmt_cmd {
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struct mtk_wmt_hdr hdr;
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u8 data[256];
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} __packed;
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struct btmtk_hci_wmt_evt {
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struct hci_event_hdr hhdr;
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struct mtk_wmt_hdr whdr;
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} __packed;
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struct btmtk_hci_wmt_evt_funcc {
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struct btmtk_hci_wmt_evt hwhdr;
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__be16 status;
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} __packed;
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struct btmtk_tci_sleep {
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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;
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} __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 btmtksdio_dev {
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struct hci_dev *hdev;
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struct sdio_func *func;
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struct device *dev;
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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 *evt_skb;
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const struct btmtksdio_data *data;
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};
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static int mtk_hci_wmt_sync(struct hci_dev *hdev,
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struct btmtk_hci_wmt_params *wmt_params)
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{
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struct btmtksdio_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;
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if (hlen > 255)
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return -EINVAL;
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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(BTMTKSDIO_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(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
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return err;
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}
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/* The vendor specific WMT commands are all answered by a vendor
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* specific event and will not have the Command Status or Command
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* Complete as with usual HCI command flow control.
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*
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* After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
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* state to be cleared. The driver specific event receive routine
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* will clear that state and with that indicate completion of the
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* WMT command.
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*/
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err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_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(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
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return err;
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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(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
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return -ETIMEDOUT;
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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 btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
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struct sk_buff *skb)
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{
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struct mtkbtsdio_hdr *sdio_hdr;
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int err;
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/* Make sure that there are enough rooms for SDIO header */
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if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
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err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
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GFP_ATOMIC);
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if (err < 0)
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return err;
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}
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/* Prepend MediaTek SDIO Specific Header */
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skb_push(skb, sizeof(*sdio_hdr));
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sdio_hdr = (void *)skb->data;
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sdio_hdr->len = cpu_to_le16(skb->len);
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sdio_hdr->reserved = cpu_to_le16(0);
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sdio_hdr->bt_type = hci_skb_pkt_type(skb);
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err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
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round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
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if (err < 0)
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goto err_skb_pull;
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bdev->hdev->stat.byte_tx += skb->len;
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kfree_skb(skb);
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return 0;
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err_skb_pull:
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skb_pull(skb, sizeof(*sdio_hdr));
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return err;
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}
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static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
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{
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return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
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}
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static void btmtksdio_tx_work(struct work_struct *work)
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{
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struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
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tx_work);
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struct sk_buff *skb;
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int err;
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pm_runtime_get_sync(bdev->dev);
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sdio_claim_host(bdev->func);
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while ((skb = skb_dequeue(&bdev->txq))) {
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err = btmtksdio_tx_packet(bdev, skb);
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if (err < 0) {
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bdev->hdev->stat.err_tx++;
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skb_queue_head(&bdev->txq, skb);
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break;
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}
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}
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sdio_release_host(bdev->func);
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pm_runtime_mark_last_busy(bdev->dev);
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pm_runtime_put_autosuspend(bdev->dev);
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}
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static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct btmtksdio_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
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* properly.
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*/
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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(BTMTKSDIO_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;
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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(BTMTKSDIO_TX_WAIT_VND_EVT,
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&bdev->tx_state)) {
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/* Barrier to sync with other CPUs */
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smp_mb__after_atomic();
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wake_up_bit(&bdev->tx_state, BTMTKSDIO_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:
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kfree_skb(bdev->evt_skb);
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bdev->evt_skb = NULL;
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err_out:
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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 },
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{ H4_RECV_SCO, .recv = hci_recv_frame },
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{ H4_RECV_EVENT, .recv = btmtksdio_recv_event },
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};
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static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
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{
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const struct h4_recv_pkt *pkts = mtk_recv_pkts;
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int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
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struct mtkbtsdio_hdr *sdio_hdr;
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int err, i, pad_size;
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struct sk_buff *skb;
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u16 dlen;
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if (rx_size < sizeof(*sdio_hdr))
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return -EILSEQ;
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/* A SDIO packet is exactly containing a Bluetooth packet */
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skb = bt_skb_alloc(rx_size, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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skb_put(skb, rx_size);
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err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
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if (err < 0)
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goto err_kfree_skb;
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sdio_hdr = (void *)skb->data;
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/* We assume the default error as -EILSEQ simply to make the error path
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* be cleaner.
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*/
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err = -EILSEQ;
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if (rx_size != le16_to_cpu(sdio_hdr->len)) {
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bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
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goto err_kfree_skb;
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}
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hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
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/* Remove MediaTek SDIO header */
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skb_pull(skb, sizeof(*sdio_hdr));
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/* We have to dig into the packet to get payload size and then know how
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* many padding bytes at the tail, these padding bytes should be removed
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* before the packet is indicated to the core layer.
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*/
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for (i = 0; i < pkts_count; i++) {
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if (sdio_hdr->bt_type == (&pkts[i])->type)
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break;
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}
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if (i >= pkts_count) {
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bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
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sdio_hdr->bt_type);
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goto err_kfree_skb;
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}
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/* Remaining bytes cannot hold a header*/
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if (skb->len < (&pkts[i])->hlen) {
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bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
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goto err_kfree_skb;
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}
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switch ((&pkts[i])->lsize) {
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case 1:
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dlen = skb->data[(&pkts[i])->loff];
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break;
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case 2:
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dlen = get_unaligned_le16(skb->data +
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(&pkts[i])->loff);
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break;
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default:
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goto err_kfree_skb;
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}
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pad_size = skb->len - (&pkts[i])->hlen - dlen;
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/* Remaining bytes cannot hold a payload */
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if (pad_size < 0) {
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bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
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goto err_kfree_skb;
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}
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/* Remove padding bytes */
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skb_trim(skb, skb->len - pad_size);
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/* Complete frame */
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(&pkts[i])->recv(bdev->hdev, skb);
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bdev->hdev->stat.byte_rx += rx_size;
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return 0;
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err_kfree_skb:
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kfree_skb(skb);
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return err;
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}
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static void btmtksdio_interrupt(struct sdio_func *func)
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{
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struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
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u32 int_status;
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u16 rx_size;
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/* It is required that the host gets ownership from the device before
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* accessing any register, however, if SDIO host is not being released,
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* a potential deadlock probably happens in a circular wait between SDIO
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* IRQ work and PM runtime work. So, we have to explicitly release SDIO
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* host here and claim again after the PM runtime work is all done.
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*/
|
|
sdio_release_host(bdev->func);
|
|
|
|
pm_runtime_get_sync(bdev->dev);
|
|
|
|
sdio_claim_host(bdev->func);
|
|
|
|
/* Disable interrupt */
|
|
sdio_writel(func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
|
|
|
|
int_status = sdio_readl(func, MTK_REG_CHISR, NULL);
|
|
|
|
/* Ack an interrupt as soon as possible before any operation on
|
|
* hardware.
|
|
*
|
|
* Note that we don't ack any status during operations to avoid race
|
|
* condition between the host and the device such as it's possible to
|
|
* mistakenly ack RX_DONE for the next packet and then cause interrupts
|
|
* not be raised again but there is still pending data in the hardware
|
|
* FIFO.
|
|
*/
|
|
sdio_writel(func, int_status, MTK_REG_CHISR, NULL);
|
|
|
|
if (unlikely(!int_status))
|
|
bt_dev_err(bdev->hdev, "CHISR is 0");
|
|
|
|
if (int_status & FW_OWN_BACK_INT)
|
|
bt_dev_dbg(bdev->hdev, "Get fw own back");
|
|
|
|
if (int_status & TX_EMPTY)
|
|
schedule_work(&bdev->tx_work);
|
|
else if (unlikely(int_status & TX_FIFO_OVERFLOW))
|
|
bt_dev_warn(bdev->hdev, "Tx fifo overflow");
|
|
|
|
if (int_status & RX_DONE_INT) {
|
|
rx_size = (int_status & RX_PKT_LEN) >> 16;
|
|
|
|
if (btmtksdio_rx_packet(bdev, rx_size) < 0)
|
|
bdev->hdev->stat.err_rx++;
|
|
}
|
|
|
|
/* Enable interrupt */
|
|
sdio_writel(func, C_INT_EN_SET, MTK_REG_CHLPCR, 0);
|
|
|
|
pm_runtime_mark_last_busy(bdev->dev);
|
|
pm_runtime_put_autosuspend(bdev->dev);
|
|
}
|
|
|
|
static int btmtksdio_open(struct hci_dev *hdev)
|
|
{
|
|
struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
|
|
int err;
|
|
u32 status;
|
|
|
|
sdio_claim_host(bdev->func);
|
|
|
|
err = sdio_enable_func(bdev->func);
|
|
if (err < 0)
|
|
goto err_release_host;
|
|
|
|
/* Get ownership from the device */
|
|
sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
|
|
if (err < 0)
|
|
goto err_disable_func;
|
|
|
|
err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
|
|
status & C_COM_DRV_OWN, 2000, 1000000);
|
|
if (err < 0) {
|
|
bt_dev_err(bdev->hdev, "Cannot get ownership from device");
|
|
goto err_disable_func;
|
|
}
|
|
|
|
/* Disable interrupt & mask out all interrupt sources */
|
|
sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
|
|
if (err < 0)
|
|
goto err_disable_func;
|
|
|
|
sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
|
|
if (err < 0)
|
|
goto err_disable_func;
|
|
|
|
err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
|
|
if (err < 0)
|
|
goto err_disable_func;
|
|
|
|
err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
|
|
if (err < 0)
|
|
goto err_release_irq;
|
|
|
|
/* SDIO CMD 5 allows the SDIO device back to idle state an
|
|
* synchronous interrupt is supported in SDIO 4-bit mode
|
|
*/
|
|
sdio_writel(bdev->func, SDIO_INT_CTL | SDIO_RE_INIT_EN,
|
|
MTK_REG_CSDIOCSR, &err);
|
|
if (err < 0)
|
|
goto err_release_irq;
|
|
|
|
/* Setup write-1-clear for CHISR register */
|
|
sdio_writel(bdev->func, C_INT_CLR_CTRL, MTK_REG_CHCR, &err);
|
|
if (err < 0)
|
|
goto err_release_irq;
|
|
|
|
/* Setup interrupt sources */
|
|
sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
|
|
MTK_REG_CHIER, &err);
|
|
if (err < 0)
|
|
goto err_release_irq;
|
|
|
|
/* Enable interrupt */
|
|
sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
|
|
if (err < 0)
|
|
goto err_release_irq;
|
|
|
|
sdio_release_host(bdev->func);
|
|
|
|
return 0;
|
|
|
|
err_release_irq:
|
|
sdio_release_irq(bdev->func);
|
|
|
|
err_disable_func:
|
|
sdio_disable_func(bdev->func);
|
|
|
|
err_release_host:
|
|
sdio_release_host(bdev->func);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int btmtksdio_close(struct hci_dev *hdev)
|
|
{
|
|
struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
|
|
u32 status;
|
|
int err;
|
|
|
|
sdio_claim_host(bdev->func);
|
|
|
|
/* Disable interrupt */
|
|
sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
|
|
|
|
sdio_release_irq(bdev->func);
|
|
|
|
/* Return ownership to the device */
|
|
sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, NULL);
|
|
|
|
err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
|
|
!(status & C_COM_DRV_OWN), 2000, 1000000);
|
|
if (err < 0)
|
|
bt_dev_err(bdev->hdev, "Cannot return ownership to device");
|
|
|
|
sdio_disable_func(bdev->func);
|
|
|
|
sdio_release_host(bdev->func);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int btmtksdio_flush(struct hci_dev *hdev)
|
|
{
|
|
struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
|
|
|
|
skb_queue_purge(&bdev->txq);
|
|
|
|
cancel_work_sync(&bdev->tx_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int btmtksdio_func_query(struct hci_dev *hdev)
|
|
{
|
|
struct btmtk_hci_wmt_params wmt_params;
|
|
int status, err;
|
|
u8 param = 0;
|
|
|
|
/* Query whether the function is enabled */
|
|
wmt_params.op = MTK_WMT_FUNC_CTRL;
|
|
wmt_params.flag = 4;
|
|
wmt_params.dlen = sizeof(param);
|
|
wmt_params.data = ¶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 mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
|
|
{
|
|
struct btmtk_hci_wmt_params wmt_params;
|
|
const struct firmware *fw;
|
|
const u8 *fw_ptr;
|
|
size_t fw_size;
|
|
int err, dlen;
|
|
u8 flag;
|
|
|
|
err = request_firmware(&fw, fwname, &hdev->dev);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
|
|
return err;
|
|
}
|
|
|
|
fw_ptr = fw->data;
|
|
fw_size = fw->size;
|
|
|
|
/* The size of patch header is 30 bytes, should be skip */
|
|
if (fw_size < 30) {
|
|
err = -EINVAL;
|
|
goto free_fw;
|
|
}
|
|
|
|
fw_size -= 30;
|
|
fw_ptr += 30;
|
|
flag = 1;
|
|
|
|
wmt_params.op = MTK_WMT_PATCH_DWNLD;
|
|
wmt_params.status = NULL;
|
|
|
|
while (fw_size > 0) {
|
|
dlen = min_t(int, 250, fw_size);
|
|
|
|
/* Tell device the position in sequence */
|
|
if (fw_size - dlen <= 0)
|
|
flag = 3;
|
|
else if (fw_size < fw->size - 30)
|
|
flag = 2;
|
|
|
|
wmt_params.flag = flag;
|
|
wmt_params.dlen = dlen;
|
|
wmt_params.data = fw_ptr;
|
|
|
|
err = mtk_hci_wmt_sync(hdev, &wmt_params);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
|
|
err);
|
|
goto free_fw;
|
|
}
|
|
|
|
fw_size -= dlen;
|
|
fw_ptr += dlen;
|
|
}
|
|
|
|
wmt_params.op = MTK_WMT_RST;
|
|
wmt_params.flag = 4;
|
|
wmt_params.dlen = 0;
|
|
wmt_params.data = NULL;
|
|
wmt_params.status = NULL;
|
|
|
|
/* Activate funciton the firmware providing to */
|
|
err = mtk_hci_wmt_sync(hdev, &wmt_params);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
|
|
goto free_fw;
|
|
}
|
|
|
|
/* Wait a few moments for firmware activation done */
|
|
usleep_range(10000, 12000);
|
|
|
|
free_fw:
|
|
release_firmware(fw);
|
|
return err;
|
|
}
|
|
|
|
static int btmtksdio_setup(struct hci_dev *hdev)
|
|
{
|
|
struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
|
|
struct btmtk_hci_wmt_params wmt_params;
|
|
ktime_t calltime, delta, rettime;
|
|
struct btmtk_tci_sleep tci_sleep;
|
|
unsigned long long duration;
|
|
struct sk_buff *skb;
|
|
int err, status;
|
|
u8 param = 0x1;
|
|
|
|
calltime = ktime_get();
|
|
|
|
/* Query whether the firmware is already download */
|
|
wmt_params.op = MTK_WMT_SEMAPHORE;
|
|
wmt_params.flag = 1;
|
|
wmt_params.dlen = 0;
|
|
wmt_params.data = NULL;
|
|
wmt_params.status = &status;
|
|
|
|
err = mtk_hci_wmt_sync(hdev, &wmt_params);
|
|
if (err < 0) {
|
|
bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
|
|
return err;
|
|
}
|
|
|
|
if (status == BTMTK_WMT_PATCH_DONE) {
|
|
bt_dev_info(hdev, "Firmware already downloaded");
|
|
goto ignore_setup_fw;
|
|
}
|
|
|
|
/* Setup a firmware which the device definitely requires */
|
|
err = mtk_setup_firmware(hdev, bdev->data->fwname);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
ignore_setup_fw:
|
|
/* Query whether the device is already enabled */
|
|
err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
|
|
status < 0 || status != BTMTK_WMT_ON_PROGRESS,
|
|
2000, 5000000);
|
|
/* -ETIMEDOUT happens */
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* The other errors happen in btusb_mtk_func_query */
|
|
if (status < 0)
|
|
return status;
|
|
|
|
if (status == BTMTK_WMT_ON_DONE) {
|
|
bt_dev_info(hdev, "function already on");
|
|
goto ignore_func_on;
|
|
}
|
|
|
|
/* Enable Bluetooth protocol */
|
|
wmt_params.op = MTK_WMT_FUNC_CTRL;
|
|
wmt_params.flag = 0;
|
|
wmt_params.dlen = sizeof(param);
|
|
wmt_params.data = ¶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;
|
|
|
|
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);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
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->tx_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int btmtksdio_probe(struct sdio_func *func,
|
|
const struct sdio_device_id *id)
|
|
{
|
|
struct btmtksdio_dev *bdev;
|
|
struct hci_dev *hdev;
|
|
int err;
|
|
|
|
bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
|
|
if (!bdev)
|
|
return -ENOMEM;
|
|
|
|
bdev->data = (void *)id->driver_data;
|
|
if (!bdev->data)
|
|
return -ENODEV;
|
|
|
|
bdev->dev = &func->dev;
|
|
bdev->func = func;
|
|
|
|
INIT_WORK(&bdev->tx_work, btmtksdio_tx_work);
|
|
skb_queue_head_init(&bdev->txq);
|
|
|
|
/* Initialize and register HCI device */
|
|
hdev = hci_alloc_dev();
|
|
if (!hdev) {
|
|
dev_err(&func->dev, "Can't allocate HCI device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev->hdev = hdev;
|
|
|
|
hdev->bus = HCI_SDIO;
|
|
hci_set_drvdata(hdev, bdev);
|
|
|
|
hdev->open = btmtksdio_open;
|
|
hdev->close = btmtksdio_close;
|
|
hdev->flush = btmtksdio_flush;
|
|
hdev->setup = btmtksdio_setup;
|
|
hdev->shutdown = btmtksdio_shutdown;
|
|
hdev->send = btmtksdio_send_frame;
|
|
SET_HCIDEV_DEV(hdev, &func->dev);
|
|
|
|
hdev->manufacturer = 70;
|
|
set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
|
|
|
|
err = hci_register_dev(hdev);
|
|
if (err < 0) {
|
|
dev_err(&func->dev, "Can't register HCI device\n");
|
|
hci_free_dev(hdev);
|
|
return err;
|
|
}
|
|
|
|
sdio_set_drvdata(func, bdev);
|
|
|
|
/* 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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void btmtksdio_remove(struct sdio_func *func)
|
|
{
|
|
struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
|
|
struct hci_dev *hdev;
|
|
|
|
if (!bdev)
|
|
return;
|
|
|
|
/* 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;
|
|
u32 status;
|
|
int err;
|
|
|
|
bdev = sdio_get_drvdata(func);
|
|
if (!bdev)
|
|
return 0;
|
|
|
|
sdio_claim_host(bdev->func);
|
|
|
|
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:
|
|
bt_dev_info(bdev->hdev, "status (%d) return ownership to device", err);
|
|
|
|
sdio_release_host(bdev->func);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int btmtksdio_runtime_resume(struct device *dev)
|
|
{
|
|
struct sdio_func *func = dev_to_sdio_func(dev);
|
|
struct btmtksdio_dev *bdev;
|
|
u32 status;
|
|
int err;
|
|
|
|
bdev = sdio_get_drvdata(func);
|
|
if (!bdev)
|
|
return 0;
|
|
|
|
sdio_claim_host(bdev->func);
|
|
|
|
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);
|
|
out:
|
|
bt_dev_info(bdev->hdev, "status (%d) get ownership from device", err);
|
|
|
|
sdio_release_host(bdev->func);
|
|
|
|
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");
|
|
MODULE_FIRMWARE(FIRMWARE_MT7663);
|
|
MODULE_FIRMWARE(FIRMWARE_MT7668);
|