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- // SPDX-License-Identifier: GPL-2.0
- // Copyright (c) 2019 MediaTek Inc.
- /*
- * Bluetooth support for MediaTek SDIO devices
- *
- * This file is written based on btsdio.c and btmtkuart.c.
- *
- * Author: Sean Wang <sean.wang@mediatek.com>
- *
- */
- #include <asm/unaligned.h>
- #include <linux/atomic.h>
- #include <linux/firmware.h>
- #include <linux/init.h>
- #include <linux/iopoll.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/pm_runtime.h>
- #include <linux/skbuff.h>
- #include <linux/mmc/host.h>
- #include <linux/mmc/sdio_ids.h>
- #include <linux/mmc/sdio_func.h>
- #include <net/bluetooth/bluetooth.h>
- #include <net/bluetooth/hci_core.h>
- #include "h4_recv.h"
- #define VERSION "0.1"
- #define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin"
- #define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin"
- #define MTKBTSDIO_AUTOSUSPEND_DELAY 8000
- static bool enable_autosuspend;
- struct btmtksdio_data {
- const char *fwname;
- };
- static const struct btmtksdio_data mt7663_data = {
- .fwname = FIRMWARE_MT7663,
- };
- static const struct btmtksdio_data mt7668_data = {
- .fwname = FIRMWARE_MT7668,
- };
- static const struct sdio_device_id btmtksdio_table[] = {
- {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663),
- .driver_data = (kernel_ulong_t)&mt7663_data },
- {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668),
- .driver_data = (kernel_ulong_t)&mt7668_data },
- { } /* Terminating entry */
- };
- MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
- #define MTK_REG_CHLPCR 0x4 /* W1S */
- #define C_INT_EN_SET BIT(0)
- #define C_INT_EN_CLR BIT(1)
- #define C_FW_OWN_REQ_SET BIT(8) /* For write */
- #define C_COM_DRV_OWN BIT(8) /* For read */
- #define C_FW_OWN_REQ_CLR BIT(9)
- #define MTK_REG_CSDIOCSR 0x8
- #define SDIO_RE_INIT_EN BIT(0)
- #define SDIO_INT_CTL BIT(2)
- #define MTK_REG_CHCR 0xc
- #define C_INT_CLR_CTRL BIT(1)
- /* CHISR have the same bits field definition with CHIER */
- #define MTK_REG_CHISR 0x10
- #define MTK_REG_CHIER 0x14
- #define FW_OWN_BACK_INT BIT(0)
- #define RX_DONE_INT BIT(1)
- #define TX_EMPTY BIT(2)
- #define TX_FIFO_OVERFLOW BIT(8)
- #define RX_PKT_LEN GENMASK(31, 16)
- #define MTK_REG_CTDR 0x18
- #define MTK_REG_CRDR 0x1c
- #define MTK_SDIO_BLOCK_SIZE 256
- #define BTMTKSDIO_TX_WAIT_VND_EVT 1
- enum {
- MTK_WMT_PATCH_DWNLD = 0x1,
- MTK_WMT_TEST = 0x2,
- MTK_WMT_WAKEUP = 0x3,
- MTK_WMT_HIF = 0x4,
- MTK_WMT_FUNC_CTRL = 0x6,
- MTK_WMT_RST = 0x7,
- MTK_WMT_SEMAPHORE = 0x17,
- };
- enum {
- BTMTK_WMT_INVALID,
- BTMTK_WMT_PATCH_UNDONE,
- BTMTK_WMT_PATCH_DONE,
- BTMTK_WMT_ON_UNDONE,
- BTMTK_WMT_ON_DONE,
- BTMTK_WMT_ON_PROGRESS,
- };
- struct mtkbtsdio_hdr {
- __le16 len;
- __le16 reserved;
- u8 bt_type;
- } __packed;
- struct mtk_wmt_hdr {
- u8 dir;
- u8 op;
- __le16 dlen;
- u8 flag;
- } __packed;
- struct mtk_hci_wmt_cmd {
- struct mtk_wmt_hdr hdr;
- u8 data[256];
- } __packed;
- struct btmtk_hci_wmt_evt {
- struct hci_event_hdr hhdr;
- struct mtk_wmt_hdr whdr;
- } __packed;
- struct btmtk_hci_wmt_evt_funcc {
- struct btmtk_hci_wmt_evt hwhdr;
- __be16 status;
- } __packed;
- struct btmtk_tci_sleep {
- u8 mode;
- __le16 duration;
- __le16 host_duration;
- u8 host_wakeup_pin;
- u8 time_compensation;
- } __packed;
- struct btmtk_hci_wmt_params {
- u8 op;
- u8 flag;
- u16 dlen;
- const void *data;
- u32 *status;
- };
- struct btmtksdio_dev {
- struct hci_dev *hdev;
- struct sdio_func *func;
- struct device *dev;
- struct work_struct tx_work;
- unsigned long tx_state;
- struct sk_buff_head txq;
- struct sk_buff *evt_skb;
- const struct btmtksdio_data *data;
- };
- static int mtk_hci_wmt_sync(struct hci_dev *hdev,
- struct btmtk_hci_wmt_params *wmt_params)
- {
- struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
- struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
- u32 hlen, status = BTMTK_WMT_INVALID;
- struct btmtk_hci_wmt_evt *wmt_evt;
- struct mtk_hci_wmt_cmd wc;
- struct mtk_wmt_hdr *hdr;
- int err;
- hlen = sizeof(*hdr) + wmt_params->dlen;
- if (hlen > 255)
- return -EINVAL;
- hdr = (struct mtk_wmt_hdr *)&wc;
- hdr->dir = 1;
- hdr->op = wmt_params->op;
- hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
- hdr->flag = wmt_params->flag;
- memcpy(wc.data, wmt_params->data, wmt_params->dlen);
- set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
- err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
- if (err < 0) {
- clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
- return err;
- }
- /* The vendor specific WMT commands are all answered by a vendor
- * specific event and will not have the Command Status or Command
- * Complete as with usual HCI command flow control.
- *
- * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
- * state to be cleared. The driver specific event receive routine
- * will clear that state and with that indicate completion of the
- * WMT command.
- */
- err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT,
- TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
- if (err == -EINTR) {
- bt_dev_err(hdev, "Execution of wmt command interrupted");
- clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
- return err;
- }
- if (err) {
- bt_dev_err(hdev, "Execution of wmt command timed out");
- clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
- return -ETIMEDOUT;
- }
- /* Parse and handle the return WMT event */
- wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
- if (wmt_evt->whdr.op != hdr->op) {
- bt_dev_err(hdev, "Wrong op received %d expected %d",
- wmt_evt->whdr.op, hdr->op);
- err = -EIO;
- goto err_free_skb;
- }
- switch (wmt_evt->whdr.op) {
- case MTK_WMT_SEMAPHORE:
- if (wmt_evt->whdr.flag == 2)
- status = BTMTK_WMT_PATCH_UNDONE;
- else
- status = BTMTK_WMT_PATCH_DONE;
- break;
- case MTK_WMT_FUNC_CTRL:
- wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
- if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
- status = BTMTK_WMT_ON_DONE;
- else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
- status = BTMTK_WMT_ON_PROGRESS;
- else
- status = BTMTK_WMT_ON_UNDONE;
- break;
- }
- if (wmt_params->status)
- *wmt_params->status = status;
- err_free_skb:
- kfree_skb(bdev->evt_skb);
- bdev->evt_skb = NULL;
- return err;
- }
- static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
- struct sk_buff *skb)
- {
- struct mtkbtsdio_hdr *sdio_hdr;
- int err;
- /* Make sure that there are enough rooms for SDIO header */
- if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
- err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
- GFP_ATOMIC);
- if (err < 0)
- return err;
- }
- /* Prepend MediaTek SDIO Specific Header */
- skb_push(skb, sizeof(*sdio_hdr));
- sdio_hdr = (void *)skb->data;
- sdio_hdr->len = cpu_to_le16(skb->len);
- sdio_hdr->reserved = cpu_to_le16(0);
- sdio_hdr->bt_type = hci_skb_pkt_type(skb);
- err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
- round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
- if (err < 0)
- goto err_skb_pull;
- bdev->hdev->stat.byte_tx += skb->len;
- kfree_skb(skb);
- return 0;
- err_skb_pull:
- skb_pull(skb, sizeof(*sdio_hdr));
- return err;
- }
- static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
- {
- return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
- }
- static void btmtksdio_tx_work(struct work_struct *work)
- {
- struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
- tx_work);
- struct sk_buff *skb;
- int err;
- pm_runtime_get_sync(bdev->dev);
- sdio_claim_host(bdev->func);
- while ((skb = skb_dequeue(&bdev->txq))) {
- err = btmtksdio_tx_packet(bdev, skb);
- if (err < 0) {
- bdev->hdev->stat.err_tx++;
- skb_queue_head(&bdev->txq, skb);
- break;
- }
- }
- sdio_release_host(bdev->func);
- pm_runtime_mark_last_busy(bdev->dev);
- pm_runtime_put_autosuspend(bdev->dev);
- }
- static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
- {
- struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
- struct hci_event_hdr *hdr = (void *)skb->data;
- int err;
- /* Fix up the vendor event id with 0xff for vendor specific instead
- * of 0xe4 so that event send via monitoring socket can be parsed
- * properly.
- */
- if (hdr->evt == 0xe4)
- hdr->evt = HCI_EV_VENDOR;
- /* When someone waits for the WMT event, the skb is being cloned
- * and being processed the events from there then.
- */
- if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) {
- bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
- if (!bdev->evt_skb) {
- err = -ENOMEM;
- goto err_out;
- }
- }
- err = hci_recv_frame(hdev, skb);
- if (err < 0)
- goto err_free_skb;
- if (hdr->evt == HCI_EV_VENDOR) {
- if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT,
- &bdev->tx_state)) {
- /* Barrier to sync with other CPUs */
- smp_mb__after_atomic();
- wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT);
- }
- }
- return 0;
- err_free_skb:
- kfree_skb(bdev->evt_skb);
- bdev->evt_skb = NULL;
- err_out:
- return err;
- }
- static const struct h4_recv_pkt mtk_recv_pkts[] = {
- { H4_RECV_ACL, .recv = hci_recv_frame },
- { H4_RECV_SCO, .recv = hci_recv_frame },
- { H4_RECV_EVENT, .recv = btmtksdio_recv_event },
- };
- static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
- {
- const struct h4_recv_pkt *pkts = mtk_recv_pkts;
- int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
- struct mtkbtsdio_hdr *sdio_hdr;
- int err, i, pad_size;
- struct sk_buff *skb;
- u16 dlen;
- if (rx_size < sizeof(*sdio_hdr))
- return -EILSEQ;
- /* A SDIO packet is exactly containing a Bluetooth packet */
- skb = bt_skb_alloc(rx_size, GFP_KERNEL);
- if (!skb)
- return -ENOMEM;
- skb_put(skb, rx_size);
- err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
- if (err < 0)
- goto err_kfree_skb;
- sdio_hdr = (void *)skb->data;
- /* We assume the default error as -EILSEQ simply to make the error path
- * be cleaner.
- */
- err = -EILSEQ;
- if (rx_size != le16_to_cpu(sdio_hdr->len)) {
- bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
- goto err_kfree_skb;
- }
- hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
- /* Remove MediaTek SDIO header */
- skb_pull(skb, sizeof(*sdio_hdr));
- /* We have to dig into the packet to get payload size and then know how
- * many padding bytes at the tail, these padding bytes should be removed
- * before the packet is indicated to the core layer.
- */
- for (i = 0; i < pkts_count; i++) {
- if (sdio_hdr->bt_type == (&pkts[i])->type)
- break;
- }
- if (i >= pkts_count) {
- bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
- sdio_hdr->bt_type);
- goto err_kfree_skb;
- }
- /* Remaining bytes cannot hold a header*/
- if (skb->len < (&pkts[i])->hlen) {
- bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
- goto err_kfree_skb;
- }
- switch ((&pkts[i])->lsize) {
- case 1:
- dlen = skb->data[(&pkts[i])->loff];
- break;
- case 2:
- dlen = get_unaligned_le16(skb->data +
- (&pkts[i])->loff);
- break;
- default:
- goto err_kfree_skb;
- }
- pad_size = skb->len - (&pkts[i])->hlen - dlen;
- /* Remaining bytes cannot hold a payload */
- if (pad_size < 0) {
- bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
- goto err_kfree_skb;
- }
- /* Remove padding bytes */
- skb_trim(skb, skb->len - pad_size);
- /* Complete frame */
- (&pkts[i])->recv(bdev->hdev, skb);
- bdev->hdev->stat.byte_rx += rx_size;
- return 0;
- err_kfree_skb:
- kfree_skb(skb);
- return err;
- }
- static void btmtksdio_interrupt(struct sdio_func *func)
- {
- struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
- u32 int_status;
- u16 rx_size;
- /* It is required that the host gets ownership from the device before
- * accessing any register, however, if SDIO host is not being released,
- * a potential deadlock probably happens in a circular wait between SDIO
- * IRQ work and PM runtime work. So, we have to explicitly release SDIO
- * host here and claim again after the PM runtime work is all done.
- */
- sdio_release_host(bdev->func);
- pm_runtime_get_sync(bdev->dev);
- sdio_claim_host(bdev->func);
- /* Disable interrupt */
- sdio_writel(func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
- int_status = sdio_readl(func, MTK_REG_CHISR, NULL);
- /* Ack an interrupt as soon as possible before any operation on
- * hardware.
- *
- * Note that we don't ack any status during operations to avoid race
- * condition between the host and the device such as it's possible to
- * mistakenly ack RX_DONE for the next packet and then cause interrupts
- * not be raised again but there is still pending data in the hardware
- * FIFO.
- */
- sdio_writel(func, int_status, MTK_REG_CHISR, NULL);
- if (unlikely(!int_status))
- bt_dev_err(bdev->hdev, "CHISR is 0");
- if (int_status & FW_OWN_BACK_INT)
- bt_dev_dbg(bdev->hdev, "Get fw own back");
- if (int_status & TX_EMPTY)
- schedule_work(&bdev->tx_work);
- else if (unlikely(int_status & TX_FIFO_OVERFLOW))
- bt_dev_warn(bdev->hdev, "Tx fifo overflow");
- if (int_status & RX_DONE_INT) {
- rx_size = (int_status & RX_PKT_LEN) >> 16;
- if (btmtksdio_rx_packet(bdev, rx_size) < 0)
- bdev->hdev->stat.err_rx++;
- }
- /* Enable interrupt */
- sdio_writel(func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
- pm_runtime_mark_last_busy(bdev->dev);
- pm_runtime_put_autosuspend(bdev->dev);
- }
- static int btmtksdio_open(struct hci_dev *hdev)
- {
- struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
- int err;
- u32 status;
- sdio_claim_host(bdev->func);
- err = sdio_enable_func(bdev->func);
- if (err < 0)
- goto err_release_host;
- /* Get ownership from the device */
- sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
- if (err < 0)
- goto err_disable_func;
- err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
- status & C_COM_DRV_OWN, 2000, 1000000);
- if (err < 0) {
- bt_dev_err(bdev->hdev, "Cannot get ownership from device");
- goto err_disable_func;
- }
- /* Disable interrupt & mask out all interrupt sources */
- sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
- if (err < 0)
- goto err_disable_func;
- sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
- if (err < 0)
- goto err_disable_func;
- err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
- if (err < 0)
- goto err_disable_func;
- err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
- if (err < 0)
- goto err_release_irq;
- /* SDIO CMD 5 allows the SDIO device back to idle state an
- * synchronous interrupt is supported in SDIO 4-bit mode
- */
- sdio_writel(bdev->func, SDIO_INT_CTL | SDIO_RE_INIT_EN,
- MTK_REG_CSDIOCSR, &err);
- if (err < 0)
- goto err_release_irq;
- /* Setup write-1-clear for CHISR register */
- sdio_writel(bdev->func, C_INT_CLR_CTRL, MTK_REG_CHCR, &err);
- if (err < 0)
- goto err_release_irq;
- /* Setup interrupt sources */
- sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
- MTK_REG_CHIER, &err);
- if (err < 0)
- goto err_release_irq;
- /* Enable interrupt */
- sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
- if (err < 0)
- goto err_release_irq;
- sdio_release_host(bdev->func);
- return 0;
- err_release_irq:
- sdio_release_irq(bdev->func);
- err_disable_func:
- sdio_disable_func(bdev->func);
- err_release_host:
- sdio_release_host(bdev->func);
- return err;
- }
- static int btmtksdio_close(struct hci_dev *hdev)
- {
- struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
- u32 status;
- int err;
- sdio_claim_host(bdev->func);
- /* Disable interrupt */
- sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
- sdio_release_irq(bdev->func);
- /* Return ownership to the device */
- sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, NULL);
- err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
- !(status & C_COM_DRV_OWN), 2000, 1000000);
- if (err < 0)
- bt_dev_err(bdev->hdev, "Cannot return ownership to device");
- sdio_disable_func(bdev->func);
- sdio_release_host(bdev->func);
- return 0;
- }
- static int btmtksdio_flush(struct hci_dev *hdev)
- {
- struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
- skb_queue_purge(&bdev->txq);
- cancel_work_sync(&bdev->tx_work);
- return 0;
- }
- static int btmtksdio_func_query(struct hci_dev *hdev)
- {
- struct btmtk_hci_wmt_params wmt_params;
- int status, err;
- u8 param = 0;
- /* Query whether the function is enabled */
- wmt_params.op = MTK_WMT_FUNC_CTRL;
- wmt_params.flag = 4;
- wmt_params.dlen = sizeof(param);
- wmt_params.data = ¶m;
- wmt_params.status = &status;
- err = mtk_hci_wmt_sync(hdev, &wmt_params);
- if (err < 0) {
- bt_dev_err(hdev, "Failed to query function status (%d)", err);
- return err;
- }
- return status;
- }
- static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
- {
- struct btmtk_hci_wmt_params wmt_params;
- const struct firmware *fw;
- const u8 *fw_ptr;
- size_t fw_size;
- int err, dlen;
- u8 flag, 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);
- sdio_set_drvdata(func, bdev);
- err = hci_register_dev(hdev);
- if (err < 0) {
- dev_err(&func->dev, "Can't register HCI device\n");
- hci_free_dev(hdev);
- return err;
- }
- /* 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_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
- sdio_claim_host(bdev->func);
- sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
- if (err < 0)
- goto out;
- err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
- !(status & C_COM_DRV_OWN), 2000, 1000000);
- out:
- bt_dev_info(bdev->hdev, "status (%d) return ownership to device", err);
- sdio_release_host(bdev->func);
- return err;
- }
- static int btmtksdio_runtime_resume(struct device *dev)
- {
- struct sdio_func *func = dev_to_sdio_func(dev);
- struct btmtksdio_dev *bdev;
- u32 status;
- int err;
- bdev = sdio_get_drvdata(func);
- if (!bdev)
- return 0;
- sdio_claim_host(bdev->func);
- sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
- if (err < 0)
- goto out;
- err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
- status & C_COM_DRV_OWN, 2000, 1000000);
- out:
- bt_dev_info(bdev->hdev, "status (%d) get ownership from device", err);
- sdio_release_host(bdev->func);
- return err;
- }
- static UNIVERSAL_DEV_PM_OPS(btmtksdio_pm_ops, btmtksdio_runtime_suspend,
- btmtksdio_runtime_resume, NULL);
- #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
- #else /* CONFIG_PM */
- #define BTMTKSDIO_PM_OPS NULL
- #endif /* CONFIG_PM */
- static struct sdio_driver btmtksdio_driver = {
- .name = "btmtksdio",
- .probe = btmtksdio_probe,
- .remove = btmtksdio_remove,
- .id_table = btmtksdio_table,
- .drv = {
- .owner = THIS_MODULE,
- .pm = BTMTKSDIO_PM_OPS,
- }
- };
- module_sdio_driver(btmtksdio_driver);
- module_param(enable_autosuspend, bool, 0644);
- MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
- MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
- MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
- MODULE_VERSION(VERSION);
- MODULE_LICENSE("GPL");
- MODULE_FIRMWARE(FIRMWARE_MT7663);
- MODULE_FIRMWARE(FIRMWARE_MT7668);
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