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1116 lines
26 KiB
1116 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (c) 2019 MediaTek Inc. |
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|
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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 <[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/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, SDIO_DEVICE_ID_MEDIATEK_MT7663), |
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.driver_data = (kernel_ulong_t)&mt7663_data }, |
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{SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668), |
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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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MODULE_DEVICE_TABLE(sdio, btmtksdio_table); |
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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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|
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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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|
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/* Remove MediaTek SDIO header */ |
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skb_pull(skb, sizeof(*sdio_hdr)); |
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|
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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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|
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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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|
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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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|
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pad_size = skb->len - (&pkts[i])->hlen - dlen; |
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|
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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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|
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/* Remove padding bytes */ |
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skb_trim(skb, skb->len - pad_size); |
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|
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/* Complete frame */ |
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(&pkts[i])->recv(bdev->hdev, skb); |
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|
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bdev->hdev->stat.byte_rx += rx_size; |
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|
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return 0; |
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|
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err_kfree_skb: |
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kfree_skb(skb); |
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|
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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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*/ |
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sdio_release_host(bdev->func); |
|
|
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pm_runtime_get_sync(bdev->dev); |
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|
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sdio_claim_host(bdev->func); |
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|
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/* Disable interrupt */ |
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sdio_writel(func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL); |
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|
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int_status = sdio_readl(func, MTK_REG_CHISR, NULL); |
|
|
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/* Ack an interrupt as soon as possible before any operation on |
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* hardware. |
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* |
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* Note that we don't ack any status during operations to avoid race |
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* condition between the host and the device such as it's possible to |
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* mistakenly ack RX_DONE for the next packet and then cause interrupts |
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* not be raised again but there is still pending data in the hardware |
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* FIFO. |
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*/ |
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sdio_writel(func, int_status, MTK_REG_CHISR, NULL); |
|
|
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if (unlikely(!int_status)) |
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bt_dev_err(bdev->hdev, "CHISR is 0"); |
|
|
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if (int_status & FW_OWN_BACK_INT) |
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bt_dev_dbg(bdev->hdev, "Get fw own back"); |
|
|
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if (int_status & TX_EMPTY) |
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schedule_work(&bdev->tx_work); |
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else if (unlikely(int_status & TX_FIFO_OVERFLOW)) |
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bt_dev_warn(bdev->hdev, "Tx fifo overflow"); |
|
|
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if (int_status & RX_DONE_INT) { |
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rx_size = (int_status & RX_PKT_LEN) >> 16; |
|
|
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if (btmtksdio_rx_packet(bdev, rx_size) < 0) |
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bdev->hdev->stat.err_rx++; |
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} |
|
|
|
/* Enable interrupt */ |
|
sdio_writel(func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL); |
|
|
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pm_runtime_mark_last_busy(bdev->dev); |
|
pm_runtime_put_autosuspend(bdev->dev); |
|
} |
|
|
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static int btmtksdio_open(struct hci_dev *hdev) |
|
{ |
|
struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); |
|
int err; |
|
u32 status; |
|
|
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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, param; |
|
|
|
err = request_firmware(&fw, fwname, &hdev->dev); |
|
if (err < 0) { |
|
bt_dev_err(hdev, "Failed to load firmware file (%d)", err); |
|
return err; |
|
} |
|
|
|
/* Power on data RAM the firmware relies on. */ |
|
param = 1; |
|
wmt_params.op = MTK_WMT_FUNC_CTRL; |
|
wmt_params.flag = 3; |
|
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 power on data RAM (%d)", err); |
|
goto free_fw; |
|
} |
|
|
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION); |
|
MODULE_VERSION(VERSION); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_FIRMWARE(FIRMWARE_MT7663); |
|
MODULE_FIRMWARE(FIRMWARE_MT7668);
|
|
|