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1135 lines
26 KiB
1135 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (c) 2018 MediaTek Inc. |
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|
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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 <[email protected]> |
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* |
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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/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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|
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#include <net/bluetooth/bluetooth.h> |
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#include <net/bluetooth/hci_core.h> |
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|
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#include "h4_recv.h" |
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|
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#define VERSION "0.2" |
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|
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#define FIRMWARE_MT7622 "mediatek/mt7622pr2h.bin" |
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#define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin" |
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#define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin" |
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|
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#define MTK_STP_TLR_SIZE 2 |
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|
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#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 |
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|
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#define BTMTKUART_FLAG_STANDALONE_HW BIT(0) |
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|
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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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|
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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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|
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struct mtk_stp_hdr { |
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u8 prefix; |
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__be16 dlen; |
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u8 cs; |
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} __packed; |
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|
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struct btmtkuart_data { |
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unsigned int flags; |
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const char *fwname; |
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}; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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struct clk *clk; |
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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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|
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const struct btmtkuart_data *data; |
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}; |
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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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|
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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 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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|
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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(BTMTKUART_TX_WAIT_VND_EVT, &bdev->tx_state); |
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|
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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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return err; |
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} |
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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 BTMTKUART_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, 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); |
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return err; |
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} |
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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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return -ETIMEDOUT; |
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} |
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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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|
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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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|
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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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{ |
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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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|
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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 |
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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(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; |
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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(BTMTKUART_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, 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: |
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kfree_skb(bdev->evt_skb); |
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bdev->evt_skb = NULL; |
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|
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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 = btmtkuart_recv_event }, |
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}; |
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static void btmtkuart_tx_work(struct work_struct *work) |
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{ |
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struct btmtkuart_dev *bdev = container_of(work, struct btmtkuart_dev, |
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tx_work); |
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struct serdev_device *serdev = bdev->serdev; |
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struct hci_dev *hdev = bdev->hdev; |
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while (1) { |
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clear_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); |
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while (1) { |
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struct sk_buff *skb = skb_dequeue(&bdev->txq); |
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int len; |
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if (!skb) |
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break; |
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len = serdev_device_write_buf(serdev, skb->data, |
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skb->len); |
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hdev->stat.byte_tx += len; |
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skb_pull(skb, len); |
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if (skb->len > 0) { |
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skb_queue_head(&bdev->txq, skb); |
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break; |
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} |
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switch (hci_skb_pkt_type(skb)) { |
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case HCI_COMMAND_PKT: |
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hdev->stat.cmd_tx++; |
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break; |
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case HCI_ACLDATA_PKT: |
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hdev->stat.acl_tx++; |
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break; |
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case HCI_SCODATA_PKT: |
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hdev->stat.sco_tx++; |
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break; |
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} |
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kfree_skb(skb); |
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} |
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if (!test_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state)) |
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break; |
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} |
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clear_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state); |
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} |
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static void btmtkuart_tx_wakeup(struct btmtkuart_dev *bdev) |
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{ |
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if (test_and_set_bit(BTMTKUART_TX_STATE_ACTIVE, &bdev->tx_state)) |
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set_bit(BTMTKUART_TX_STATE_WAKEUP, &bdev->tx_state); |
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schedule_work(&bdev->tx_work); |
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} |
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static const unsigned char * |
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mtk_stp_split(struct btmtkuart_dev *bdev, const unsigned char *data, int count, |
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int *sz_h4) |
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{ |
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struct mtk_stp_hdr *shdr; |
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|
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/* The cursor is reset when all the data of STP is consumed out */ |
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if (!bdev->stp_dlen && bdev->stp_cursor >= 6) |
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bdev->stp_cursor = 0; |
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|
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/* Filling pad until all STP info is obtained */ |
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while (bdev->stp_cursor < 6 && count > 0) { |
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bdev->stp_pad[bdev->stp_cursor] = *data; |
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bdev->stp_cursor++; |
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data++; |
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count--; |
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} |
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|
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/* Retrieve STP info and have a sanity check */ |
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if (!bdev->stp_dlen && bdev->stp_cursor >= 6) { |
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shdr = (struct mtk_stp_hdr *)&bdev->stp_pad[2]; |
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bdev->stp_dlen = be16_to_cpu(shdr->dlen) & 0x0fff; |
|
|
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/* Resync STP when unexpected data is being read */ |
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if (shdr->prefix != 0x80 || bdev->stp_dlen > 2048) { |
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bt_dev_err(bdev->hdev, "stp format unexpect (%d, %d)", |
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shdr->prefix, bdev->stp_dlen); |
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bdev->stp_cursor = 2; |
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bdev->stp_dlen = 0; |
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} |
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} |
|
|
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/* Directly quit when there's no data found for H4 can process */ |
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if (count <= 0) |
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return NULL; |
|
|
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/* Tranlate to how much the size of data H4 can handle so far */ |
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*sz_h4 = min_t(int, count, bdev->stp_dlen); |
|
|
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/* Update the remaining size of STP packet */ |
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bdev->stp_dlen -= *sz_h4; |
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|
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/* Data points to STP payload which can be handled by H4 */ |
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return data; |
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} |
|
|
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static int btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) |
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{ |
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struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); |
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const unsigned char *p_left = data, *p_h4; |
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int sz_left = count, sz_h4, adv; |
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int err; |
|
|
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while (sz_left > 0) { |
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/* The serial data received from MT7622 BT controller is |
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* at all time padded around with the STP header and tailer. |
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* |
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* A full STP packet is looking like |
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* ----------------------------------- |
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* | STP header | H:4 | STP tailer | |
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* ----------------------------------- |
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* but it doesn't guarantee to contain a full H:4 packet which |
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* means that it's possible for multiple STP packets forms a |
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* full H:4 packet that means extra STP header + length doesn't |
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* indicate a full H:4 frame, things can fragment. Whose length |
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* recorded in STP header just shows up the most length the |
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* H:4 engine can handle currently. |
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*/ |
|
|
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p_h4 = mtk_stp_split(bdev, p_left, sz_left, &sz_h4); |
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if (!p_h4) |
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break; |
|
|
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adv = p_h4 - p_left; |
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sz_left -= adv; |
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p_left += adv; |
|
|
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bdev->rx_skb = h4_recv_buf(bdev->hdev, bdev->rx_skb, p_h4, |
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sz_h4, mtk_recv_pkts, |
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ARRAY_SIZE(mtk_recv_pkts)); |
|
if (IS_ERR(bdev->rx_skb)) { |
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err = PTR_ERR(bdev->rx_skb); |
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bt_dev_err(bdev->hdev, |
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"Frame reassembly failed (%d)", err); |
|
bdev->rx_skb = NULL; |
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return err; |
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} |
|
|
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sz_left -= sz_h4; |
|
p_left += sz_h4; |
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} |
|
|
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return 0; |
|
} |
|
|
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static int btmtkuart_receive_buf(struct serdev_device *serdev, const u8 *data, |
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size_t count) |
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{ |
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struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); |
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int err; |
|
|
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err = btmtkuart_recv(bdev->hdev, data, count); |
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if (err < 0) |
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return err; |
|
|
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bdev->hdev->stat.byte_rx += count; |
|
|
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return count; |
|
} |
|
|
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static void btmtkuart_write_wakeup(struct serdev_device *serdev) |
|
{ |
|
struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); |
|
|
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btmtkuart_tx_wakeup(bdev); |
|
} |
|
|
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static const struct serdev_device_ops btmtkuart_client_ops = { |
|
.receive_buf = btmtkuart_receive_buf, |
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.write_wakeup = btmtkuart_write_wakeup, |
|
}; |
|
|
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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, |
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.remove = btmtkuart_remove, |
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.driver = { |
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.name = "btmtkuart", |
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.of_match_table = of_match_ptr(mtk_of_match_table), |
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}, |
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}; |
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module_serdev_device_driver(btmtkuart_driver); |
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MODULE_AUTHOR("Sean Wang <[email protected]>"); |
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MODULE_DESCRIPTION("MediaTek Bluetooth Serial driver ver " VERSION); |
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MODULE_VERSION(VERSION); |
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MODULE_LICENSE("GPL"); |
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MODULE_FIRMWARE(FIRMWARE_MT7622); |
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MODULE_FIRMWARE(FIRMWARE_MT7663); |
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MODULE_FIRMWARE(FIRMWARE_MT7668);
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