1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2019 MediaTek Inc.
5 * Bluetooth support for MediaTek SDIO devices
7 * This file is written based on btsdio.c and btmtkuart.c.
9 * Author: Sean Wang <sean.wang@mediatek.com>
13 #include <asm/unaligned.h>
14 #include <linux/atomic.h>
15 #include <linux/firmware.h>
16 #include <linux/init.h>
17 #include <linux/iopoll.h>
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/skbuff.h>
23 #include <linux/mmc/host.h>
24 #include <linux/mmc/sdio_ids.h>
25 #include <linux/mmc/sdio_func.h>
27 #include <net/bluetooth/bluetooth.h>
28 #include <net/bluetooth/hci_core.h>
34 #define FIRMWARE_MT7663 "/*(DEBLOBBED)*/"
35 #define FIRMWARE_MT7668 "/*(DEBLOBBED)*/"
37 #define MTKBTSDIO_AUTOSUSPEND_DELAY 8000
39 static bool enable_autosuspend;
41 struct btmtksdio_data {
45 static const struct btmtksdio_data mt7663_data = {
46 .fwname = FIRMWARE_MT7663,
49 static const struct btmtksdio_data mt7668_data = {
50 .fwname = FIRMWARE_MT7668,
53 static const struct sdio_device_id btmtksdio_table[] = {
54 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7663),
55 .driver_data = (kernel_ulong_t)&mt7663_data },
56 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7668),
57 .driver_data = (kernel_ulong_t)&mt7668_data },
58 { } /* Terminating entry */
61 #define MTK_REG_CHLPCR 0x4 /* W1S */
62 #define C_INT_EN_SET BIT(0)
63 #define C_INT_EN_CLR BIT(1)
64 #define C_FW_OWN_REQ_SET BIT(8) /* For write */
65 #define C_COM_DRV_OWN BIT(8) /* For read */
66 #define C_FW_OWN_REQ_CLR BIT(9)
68 #define MTK_REG_CSDIOCSR 0x8
69 #define SDIO_RE_INIT_EN BIT(0)
70 #define SDIO_INT_CTL BIT(2)
72 #define MTK_REG_CHCR 0xc
73 #define C_INT_CLR_CTRL BIT(1)
75 /* CHISR have the same bits field definition with CHIER */
76 #define MTK_REG_CHISR 0x10
77 #define MTK_REG_CHIER 0x14
78 #define FW_OWN_BACK_INT BIT(0)
79 #define RX_DONE_INT BIT(1)
80 #define TX_EMPTY BIT(2)
81 #define TX_FIFO_OVERFLOW BIT(8)
82 #define RX_PKT_LEN GENMASK(31, 16)
84 #define MTK_REG_CTDR 0x18
86 #define MTK_REG_CRDR 0x1c
88 #define MTK_SDIO_BLOCK_SIZE 256
90 #define BTMTKSDIO_TX_WAIT_VND_EVT 1
93 MTK_WMT_PATCH_DWNLD = 0x1,
97 MTK_WMT_FUNC_CTRL = 0x6,
99 MTK_WMT_SEMAPHORE = 0x17,
104 BTMTK_WMT_PATCH_UNDONE,
105 BTMTK_WMT_PATCH_DONE,
108 BTMTK_WMT_ON_PROGRESS,
111 struct mtkbtsdio_hdr {
124 struct mtk_hci_wmt_cmd {
125 struct mtk_wmt_hdr hdr;
129 struct btmtk_hci_wmt_evt {
130 struct hci_event_hdr hhdr;
131 struct mtk_wmt_hdr whdr;
134 struct btmtk_hci_wmt_evt_funcc {
135 struct btmtk_hci_wmt_evt hwhdr;
139 struct btmtk_tci_sleep {
142 __le16 host_duration;
144 u8 time_compensation;
147 struct btmtk_hci_wmt_params {
155 struct btmtksdio_dev {
156 struct hci_dev *hdev;
157 struct sdio_func *func;
160 struct work_struct tx_work;
161 unsigned long tx_state;
162 struct sk_buff_head txq;
164 struct sk_buff *evt_skb;
166 const struct btmtksdio_data *data;
169 static int mtk_hci_wmt_sync(struct hci_dev *hdev,
170 struct btmtk_hci_wmt_params *wmt_params)
172 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
173 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
174 u32 hlen, status = BTMTK_WMT_INVALID;
175 struct btmtk_hci_wmt_evt *wmt_evt;
176 struct mtk_hci_wmt_cmd wc;
177 struct mtk_wmt_hdr *hdr;
180 hlen = sizeof(*hdr) + wmt_params->dlen;
184 hdr = (struct mtk_wmt_hdr *)&wc;
186 hdr->op = wmt_params->op;
187 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
188 hdr->flag = wmt_params->flag;
189 memcpy(wc.data, wmt_params->data, wmt_params->dlen);
191 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
193 err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
195 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
199 /* The vendor specific WMT commands are all answered by a vendor
200 * specific event and will not have the Command Status or Command
201 * Complete as with usual HCI command flow control.
203 * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
204 * state to be cleared. The driver specific event receive routine
205 * will clear that state and with that indicate completion of the
208 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT,
209 TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
211 bt_dev_err(hdev, "Execution of wmt command interrupted");
212 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
217 bt_dev_err(hdev, "Execution of wmt command timed out");
218 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
222 /* Parse and handle the return WMT event */
223 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
224 if (wmt_evt->whdr.op != hdr->op) {
225 bt_dev_err(hdev, "Wrong op received %d expected %d",
226 wmt_evt->whdr.op, hdr->op);
231 switch (wmt_evt->whdr.op) {
232 case MTK_WMT_SEMAPHORE:
233 if (wmt_evt->whdr.flag == 2)
234 status = BTMTK_WMT_PATCH_UNDONE;
236 status = BTMTK_WMT_PATCH_DONE;
238 case MTK_WMT_FUNC_CTRL:
239 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
240 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
241 status = BTMTK_WMT_ON_DONE;
242 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
243 status = BTMTK_WMT_ON_PROGRESS;
245 status = BTMTK_WMT_ON_UNDONE;
249 if (wmt_params->status)
250 *wmt_params->status = status;
253 kfree_skb(bdev->evt_skb);
254 bdev->evt_skb = NULL;
259 static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
262 struct mtkbtsdio_hdr *sdio_hdr;
265 /* Make sure that there are enough rooms for SDIO header */
266 if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
267 err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
273 /* Prepend MediaTek SDIO Specific Header */
274 skb_push(skb, sizeof(*sdio_hdr));
276 sdio_hdr = (void *)skb->data;
277 sdio_hdr->len = cpu_to_le16(skb->len);
278 sdio_hdr->reserved = cpu_to_le16(0);
279 sdio_hdr->bt_type = hci_skb_pkt_type(skb);
281 err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
282 round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
286 bdev->hdev->stat.byte_tx += skb->len;
293 skb_pull(skb, sizeof(*sdio_hdr));
298 static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
300 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
303 static void btmtksdio_tx_work(struct work_struct *work)
305 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
310 pm_runtime_get_sync(bdev->dev);
312 sdio_claim_host(bdev->func);
314 while ((skb = skb_dequeue(&bdev->txq))) {
315 err = btmtksdio_tx_packet(bdev, skb);
317 bdev->hdev->stat.err_tx++;
318 skb_queue_head(&bdev->txq, skb);
323 sdio_release_host(bdev->func);
325 pm_runtime_mark_last_busy(bdev->dev);
326 pm_runtime_put_autosuspend(bdev->dev);
329 static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
331 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
332 struct hci_event_hdr *hdr = (void *)skb->data;
335 /* Fix up the vendor event id with 0xff for vendor specific instead
336 * of 0xe4 so that event send via monitoring socket can be parsed
339 if (hdr->evt == 0xe4)
340 hdr->evt = HCI_EV_VENDOR;
342 /* When someone waits for the WMT event, the skb is being cloned
343 * and being processed the events from there then.
345 if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) {
346 bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
347 if (!bdev->evt_skb) {
353 err = hci_recv_frame(hdev, skb);
357 if (hdr->evt == HCI_EV_VENDOR) {
358 if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT,
360 /* Barrier to sync with other CPUs */
361 smp_mb__after_atomic();
362 wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT);
369 kfree_skb(bdev->evt_skb);
370 bdev->evt_skb = NULL;
376 static const struct h4_recv_pkt mtk_recv_pkts[] = {
377 { H4_RECV_ACL, .recv = hci_recv_frame },
378 { H4_RECV_SCO, .recv = hci_recv_frame },
379 { H4_RECV_EVENT, .recv = btmtksdio_recv_event },
382 static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
384 const struct h4_recv_pkt *pkts = mtk_recv_pkts;
385 int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
386 struct mtkbtsdio_hdr *sdio_hdr;
387 int err, i, pad_size;
391 if (rx_size < sizeof(*sdio_hdr))
394 /* A SDIO packet is exactly containing a Bluetooth packet */
395 skb = bt_skb_alloc(rx_size, GFP_KERNEL);
399 skb_put(skb, rx_size);
401 err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
405 sdio_hdr = (void *)skb->data;
407 /* We assume the default error as -EILSEQ simply to make the error path
412 if (rx_size != le16_to_cpu(sdio_hdr->len)) {
413 bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
417 hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
419 /* Remove MediaTek SDIO header */
420 skb_pull(skb, sizeof(*sdio_hdr));
422 /* We have to dig into the packet to get payload size and then know how
423 * many padding bytes at the tail, these padding bytes should be removed
424 * before the packet is indicated to the core layer.
426 for (i = 0; i < pkts_count; i++) {
427 if (sdio_hdr->bt_type == (&pkts[i])->type)
431 if (i >= pkts_count) {
432 bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
437 /* Remaining bytes cannot hold a header*/
438 if (skb->len < (&pkts[i])->hlen) {
439 bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
443 switch ((&pkts[i])->lsize) {
445 dlen = skb->data[(&pkts[i])->loff];
448 dlen = get_unaligned_le16(skb->data +
455 pad_size = skb->len - (&pkts[i])->hlen - dlen;
457 /* Remaining bytes cannot hold a payload */
459 bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
463 /* Remove padding bytes */
464 skb_trim(skb, skb->len - pad_size);
467 (&pkts[i])->recv(bdev->hdev, skb);
469 bdev->hdev->stat.byte_rx += rx_size;
479 static void btmtksdio_interrupt(struct sdio_func *func)
481 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
485 /* It is required that the host gets ownership from the device before
486 * accessing any register, however, if SDIO host is not being released,
487 * a potential deadlock probably happens in a circular wait between SDIO
488 * IRQ work and PM runtime work. So, we have to explicitly release SDIO
489 * host here and claim again after the PM runtime work is all done.
491 sdio_release_host(bdev->func);
493 pm_runtime_get_sync(bdev->dev);
495 sdio_claim_host(bdev->func);
497 /* Disable interrupt */
498 sdio_writel(func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
500 int_status = sdio_readl(func, MTK_REG_CHISR, NULL);
502 /* Ack an interrupt as soon as possible before any operation on
505 * Note that we don't ack any status during operations to avoid race
506 * condition between the host and the device such as it's possible to
507 * mistakenly ack RX_DONE for the next packet and then cause interrupts
508 * not be raised again but there is still pending data in the hardware
511 sdio_writel(func, int_status, MTK_REG_CHISR, NULL);
513 if (unlikely(!int_status))
514 bt_dev_err(bdev->hdev, "CHISR is 0");
516 if (int_status & FW_OWN_BACK_INT)
517 bt_dev_dbg(bdev->hdev, "Get fw own back");
519 if (int_status & TX_EMPTY)
520 schedule_work(&bdev->tx_work);
521 else if (unlikely(int_status & TX_FIFO_OVERFLOW))
522 bt_dev_warn(bdev->hdev, "Tx fifo overflow");
524 if (int_status & RX_DONE_INT) {
525 rx_size = (int_status & RX_PKT_LEN) >> 16;
527 if (btmtksdio_rx_packet(bdev, rx_size) < 0)
528 bdev->hdev->stat.err_rx++;
531 /* Enable interrupt */
532 sdio_writel(func, C_INT_EN_SET, MTK_REG_CHLPCR, 0);
534 pm_runtime_mark_last_busy(bdev->dev);
535 pm_runtime_put_autosuspend(bdev->dev);
538 static int btmtksdio_open(struct hci_dev *hdev)
540 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
544 sdio_claim_host(bdev->func);
546 err = sdio_enable_func(bdev->func);
548 goto err_release_host;
550 /* Get ownership from the device */
551 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
553 goto err_disable_func;
555 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
556 status & C_COM_DRV_OWN, 2000, 1000000);
558 bt_dev_err(bdev->hdev, "Cannot get ownership from device");
559 goto err_disable_func;
562 /* Disable interrupt & mask out all interrupt sources */
563 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
565 goto err_disable_func;
567 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
569 goto err_disable_func;
571 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
573 goto err_disable_func;
575 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
577 goto err_release_irq;
579 /* SDIO CMD 5 allows the SDIO device back to idle state an
580 * synchronous interrupt is supported in SDIO 4-bit mode
582 sdio_writel(bdev->func, SDIO_INT_CTL | SDIO_RE_INIT_EN,
583 MTK_REG_CSDIOCSR, &err);
585 goto err_release_irq;
587 /* Setup write-1-clear for CHISR register */
588 sdio_writel(bdev->func, C_INT_CLR_CTRL, MTK_REG_CHCR, &err);
590 goto err_release_irq;
592 /* Setup interrupt sources */
593 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
594 MTK_REG_CHIER, &err);
596 goto err_release_irq;
598 /* Enable interrupt */
599 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
601 goto err_release_irq;
603 sdio_release_host(bdev->func);
608 sdio_release_irq(bdev->func);
611 sdio_disable_func(bdev->func);
614 sdio_release_host(bdev->func);
619 static int btmtksdio_close(struct hci_dev *hdev)
621 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
625 sdio_claim_host(bdev->func);
627 /* Disable interrupt */
628 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
630 sdio_release_irq(bdev->func);
632 /* Return ownership to the device */
633 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, NULL);
635 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
636 !(status & C_COM_DRV_OWN), 2000, 1000000);
638 bt_dev_err(bdev->hdev, "Cannot return ownership to device");
640 sdio_disable_func(bdev->func);
642 sdio_release_host(bdev->func);
647 static int btmtksdio_flush(struct hci_dev *hdev)
649 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
651 skb_queue_purge(&bdev->txq);
653 cancel_work_sync(&bdev->tx_work);
658 static int btmtksdio_func_query(struct hci_dev *hdev)
660 struct btmtk_hci_wmt_params wmt_params;
664 /* Query whether the function is enabled */
665 wmt_params.op = MTK_WMT_FUNC_CTRL;
667 wmt_params.dlen = sizeof(param);
668 wmt_params.data = ¶m;
669 wmt_params.status = &status;
671 err = mtk_hci_wmt_sync(hdev, &wmt_params);
673 bt_dev_err(hdev, "Failed to query function status (%d)", err);
680 static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
682 struct btmtk_hci_wmt_params wmt_params;
683 const struct firmware *fw;
689 err = reject_firmware(&fw, fwname, &hdev->dev);
691 bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
695 /* Power on data RAM the firmware relies on. */
697 wmt_params.op = MTK_WMT_FUNC_CTRL;
699 wmt_params.dlen = sizeof(param);
700 wmt_params.data = ¶m;
701 wmt_params.status = NULL;
703 err = mtk_hci_wmt_sync(hdev, &wmt_params);
705 bt_dev_err(hdev, "Failed to power on data RAM (%d)", err);
712 /* The size of patch header is 30 bytes, should be skip */
722 wmt_params.op = MTK_WMT_PATCH_DWNLD;
723 wmt_params.status = NULL;
725 while (fw_size > 0) {
726 dlen = min_t(int, 250, fw_size);
728 /* Tell device the position in sequence */
729 if (fw_size - dlen <= 0)
731 else if (fw_size < fw->size - 30)
734 wmt_params.flag = flag;
735 wmt_params.dlen = dlen;
736 wmt_params.data = fw_ptr;
738 err = mtk_hci_wmt_sync(hdev, &wmt_params);
740 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
749 wmt_params.op = MTK_WMT_RST;
752 wmt_params.data = NULL;
753 wmt_params.status = NULL;
755 /* Activate funciton the firmware providing to */
756 err = mtk_hci_wmt_sync(hdev, &wmt_params);
758 bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
762 /* Wait a few moments for firmware activation done */
763 usleep_range(10000, 12000);
766 release_firmware(fw);
770 static int btmtksdio_setup(struct hci_dev *hdev)
772 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
773 struct btmtk_hci_wmt_params wmt_params;
774 ktime_t calltime, delta, rettime;
775 struct btmtk_tci_sleep tci_sleep;
776 unsigned long long duration;
781 calltime = ktime_get();
783 /* Query whether the firmware is already download */
784 wmt_params.op = MTK_WMT_SEMAPHORE;
787 wmt_params.data = NULL;
788 wmt_params.status = &status;
790 err = mtk_hci_wmt_sync(hdev, &wmt_params);
792 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
796 if (status == BTMTK_WMT_PATCH_DONE) {
797 bt_dev_info(hdev, "Firmware already downloaded");
798 goto ignore_setup_fw;
801 /* Setup a firmware which the device definitely requires */
802 err = mtk_setup_firmware(hdev, bdev->data->fwname);
807 /* Query whether the device is already enabled */
808 err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
809 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
811 /* -ETIMEDOUT happens */
815 /* The other errors happen in btusb_mtk_func_query */
819 if (status == BTMTK_WMT_ON_DONE) {
820 bt_dev_info(hdev, "function already on");
824 /* Enable Bluetooth protocol */
825 wmt_params.op = MTK_WMT_FUNC_CTRL;
827 wmt_params.dlen = sizeof(param);
828 wmt_params.data = ¶m;
829 wmt_params.status = NULL;
831 err = mtk_hci_wmt_sync(hdev, &wmt_params);
833 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
838 /* Apply the low power environment setup */
839 tci_sleep.mode = 0x5;
840 tci_sleep.duration = cpu_to_le16(0x640);
841 tci_sleep.host_duration = cpu_to_le16(0x640);
842 tci_sleep.host_wakeup_pin = 0;
843 tci_sleep.time_compensation = 0;
845 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
849 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
854 rettime = ktime_get();
855 delta = ktime_sub(rettime, calltime);
856 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
858 pm_runtime_set_autosuspend_delay(bdev->dev,
859 MTKBTSDIO_AUTOSUSPEND_DELAY);
860 pm_runtime_use_autosuspend(bdev->dev);
862 err = pm_runtime_set_active(bdev->dev);
866 /* Default forbid runtime auto suspend, that can be allowed by
867 * enable_autosuspend flag or the PM runtime entry under sysfs.
869 pm_runtime_forbid(bdev->dev);
870 pm_runtime_enable(bdev->dev);
872 if (enable_autosuspend)
873 pm_runtime_allow(bdev->dev);
875 bt_dev_info(hdev, "Device setup in %llu usecs", duration);
880 static int btmtksdio_shutdown(struct hci_dev *hdev)
882 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
883 struct btmtk_hci_wmt_params wmt_params;
887 /* Get back the state to be consistent with the state
888 * in btmtksdio_setup.
890 pm_runtime_get_sync(bdev->dev);
892 /* Disable the device */
893 wmt_params.op = MTK_WMT_FUNC_CTRL;
895 wmt_params.dlen = sizeof(param);
896 wmt_params.data = ¶m;
897 wmt_params.status = NULL;
899 err = mtk_hci_wmt_sync(hdev, &wmt_params);
901 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
905 pm_runtime_put_noidle(bdev->dev);
906 pm_runtime_disable(bdev->dev);
911 static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
913 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
915 switch (hci_skb_pkt_type(skb)) {
916 case HCI_COMMAND_PKT:
920 case HCI_ACLDATA_PKT:
924 case HCI_SCODATA_PKT:
932 skb_queue_tail(&bdev->txq, skb);
934 schedule_work(&bdev->tx_work);
939 static int btmtksdio_probe(struct sdio_func *func,
940 const struct sdio_device_id *id)
942 struct btmtksdio_dev *bdev;
943 struct hci_dev *hdev;
946 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
950 bdev->data = (void *)id->driver_data;
954 bdev->dev = &func->dev;
957 INIT_WORK(&bdev->tx_work, btmtksdio_tx_work);
958 skb_queue_head_init(&bdev->txq);
960 /* Initialize and register HCI device */
961 hdev = hci_alloc_dev();
963 dev_err(&func->dev, "Can't allocate HCI device\n");
969 hdev->bus = HCI_SDIO;
970 hci_set_drvdata(hdev, bdev);
972 hdev->open = btmtksdio_open;
973 hdev->close = btmtksdio_close;
974 hdev->flush = btmtksdio_flush;
975 hdev->setup = btmtksdio_setup;
976 hdev->shutdown = btmtksdio_shutdown;
977 hdev->send = btmtksdio_send_frame;
978 SET_HCIDEV_DEV(hdev, &func->dev);
980 hdev->manufacturer = 70;
981 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
983 sdio_set_drvdata(func, bdev);
985 err = hci_register_dev(hdev);
987 dev_err(&func->dev, "Can't register HCI device\n");
992 /* pm_runtime_enable would be done after the firmware is being
993 * downloaded because the core layer probably already enables
994 * runtime PM for this func such as the case host->caps &
995 * MMC_CAP_POWER_OFF_CARD.
997 if (pm_runtime_enabled(bdev->dev))
998 pm_runtime_disable(bdev->dev);
1000 /* As explaination in drivers/mmc/core/sdio_bus.c tells us:
1001 * Unbound SDIO functions are always suspended.
1002 * During probe, the function is set active and the usage count
1003 * is incremented. If the driver supports runtime PM,
1004 * it should call pm_runtime_put_noidle() in its probe routine and
1005 * pm_runtime_get_noresume() in its remove routine.
1007 * So, put a pm_runtime_put_noidle here !
1009 pm_runtime_put_noidle(bdev->dev);
1014 static void btmtksdio_remove(struct sdio_func *func)
1016 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
1017 struct hci_dev *hdev;
1022 /* Be consistent the state in btmtksdio_probe */
1023 pm_runtime_get_noresume(bdev->dev);
1027 sdio_set_drvdata(func, NULL);
1028 hci_unregister_dev(hdev);
1033 static int btmtksdio_runtime_suspend(struct device *dev)
1035 struct sdio_func *func = dev_to_sdio_func(dev);
1036 struct btmtksdio_dev *bdev;
1040 bdev = sdio_get_drvdata(func);
1044 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1046 sdio_claim_host(bdev->func);
1048 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
1052 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
1053 !(status & C_COM_DRV_OWN), 2000, 1000000);
1055 bt_dev_info(bdev->hdev, "status (%d) return ownership to device", err);
1057 sdio_release_host(bdev->func);
1062 static int btmtksdio_runtime_resume(struct device *dev)
1064 struct sdio_func *func = dev_to_sdio_func(dev);
1065 struct btmtksdio_dev *bdev;
1069 bdev = sdio_get_drvdata(func);
1073 sdio_claim_host(bdev->func);
1075 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
1079 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
1080 status & C_COM_DRV_OWN, 2000, 1000000);
1082 bt_dev_info(bdev->hdev, "status (%d) get ownership from device", err);
1084 sdio_release_host(bdev->func);
1089 static UNIVERSAL_DEV_PM_OPS(btmtksdio_pm_ops, btmtksdio_runtime_suspend,
1090 btmtksdio_runtime_resume, NULL);
1091 #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
1092 #else /* CONFIG_PM */
1093 #define BTMTKSDIO_PM_OPS NULL
1094 #endif /* CONFIG_PM */
1096 static struct sdio_driver btmtksdio_driver = {
1097 .name = "btmtksdio",
1098 .probe = btmtksdio_probe,
1099 .remove = btmtksdio_remove,
1100 .id_table = btmtksdio_table,
1102 .owner = THIS_MODULE,
1103 .pm = BTMTKSDIO_PM_OPS,
1107 module_sdio_driver(btmtksdio_driver);
1109 module_param(enable_autosuspend, bool, 0644);
1110 MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
1112 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1113 MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
1114 MODULE_VERSION(VERSION);
1115 MODULE_LICENSE("GPL");