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 "mediatek/mt7663pr2h.bin"
35 #define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin"
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, SDIO_DEVICE_ID_MEDIATEK_MT7663),
55 .driver_data = (kernel_ulong_t)&mt7663_data },
56 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668),
57 .driver_data = (kernel_ulong_t)&mt7668_data },
58 { } /* Terminating entry */
60 MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
62 #define MTK_REG_CHLPCR 0x4 /* W1S */
63 #define C_INT_EN_SET BIT(0)
64 #define C_INT_EN_CLR BIT(1)
65 #define C_FW_OWN_REQ_SET BIT(8) /* For write */
66 #define C_COM_DRV_OWN BIT(8) /* For read */
67 #define C_FW_OWN_REQ_CLR BIT(9)
69 #define MTK_REG_CSDIOCSR 0x8
70 #define SDIO_RE_INIT_EN BIT(0)
71 #define SDIO_INT_CTL BIT(2)
73 #define MTK_REG_CHCR 0xc
74 #define C_INT_CLR_CTRL BIT(1)
76 /* CHISR have the same bits field definition with CHIER */
77 #define MTK_REG_CHISR 0x10
78 #define MTK_REG_CHIER 0x14
79 #define FW_OWN_BACK_INT BIT(0)
80 #define RX_DONE_INT BIT(1)
81 #define TX_EMPTY BIT(2)
82 #define TX_FIFO_OVERFLOW BIT(8)
83 #define RX_PKT_LEN GENMASK(31, 16)
85 #define MTK_REG_CTDR 0x18
87 #define MTK_REG_CRDR 0x1c
89 #define MTK_SDIO_BLOCK_SIZE 256
91 #define BTMTKSDIO_TX_WAIT_VND_EVT 1
94 MTK_WMT_PATCH_DWNLD = 0x1,
98 MTK_WMT_FUNC_CTRL = 0x6,
100 MTK_WMT_SEMAPHORE = 0x17,
105 BTMTK_WMT_PATCH_UNDONE,
106 BTMTK_WMT_PATCH_DONE,
109 BTMTK_WMT_ON_PROGRESS,
112 struct mtkbtsdio_hdr {
125 struct mtk_hci_wmt_cmd {
126 struct mtk_wmt_hdr hdr;
130 struct btmtk_hci_wmt_evt {
131 struct hci_event_hdr hhdr;
132 struct mtk_wmt_hdr whdr;
135 struct btmtk_hci_wmt_evt_funcc {
136 struct btmtk_hci_wmt_evt hwhdr;
140 struct btmtk_tci_sleep {
143 __le16 host_duration;
145 u8 time_compensation;
148 struct btmtk_hci_wmt_params {
156 struct btmtksdio_dev {
157 struct hci_dev *hdev;
158 struct sdio_func *func;
161 struct work_struct tx_work;
162 unsigned long tx_state;
163 struct sk_buff_head txq;
165 struct sk_buff *evt_skb;
167 const struct btmtksdio_data *data;
170 static int mtk_hci_wmt_sync(struct hci_dev *hdev,
171 struct btmtk_hci_wmt_params *wmt_params)
173 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
174 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
175 u32 hlen, status = BTMTK_WMT_INVALID;
176 struct btmtk_hci_wmt_evt *wmt_evt;
177 struct mtk_hci_wmt_cmd wc;
178 struct mtk_wmt_hdr *hdr;
181 hlen = sizeof(*hdr) + wmt_params->dlen;
185 hdr = (struct mtk_wmt_hdr *)&wc;
187 hdr->op = wmt_params->op;
188 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
189 hdr->flag = wmt_params->flag;
190 memcpy(wc.data, wmt_params->data, wmt_params->dlen);
192 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
194 err = __hci_cmd_send(hdev, 0xfc6f, hlen, &wc);
196 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
200 /* The vendor specific WMT commands are all answered by a vendor
201 * specific event and will not have the Command Status or Command
202 * Complete as with usual HCI command flow control.
204 * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
205 * state to be cleared. The driver specific event receive routine
206 * will clear that state and with that indicate completion of the
209 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT,
210 TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
212 bt_dev_err(hdev, "Execution of wmt command interrupted");
213 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
218 bt_dev_err(hdev, "Execution of wmt command timed out");
219 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
223 /* Parse and handle the return WMT event */
224 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
225 if (wmt_evt->whdr.op != hdr->op) {
226 bt_dev_err(hdev, "Wrong op received %d expected %d",
227 wmt_evt->whdr.op, hdr->op);
232 switch (wmt_evt->whdr.op) {
233 case MTK_WMT_SEMAPHORE:
234 if (wmt_evt->whdr.flag == 2)
235 status = BTMTK_WMT_PATCH_UNDONE;
237 status = BTMTK_WMT_PATCH_DONE;
239 case MTK_WMT_FUNC_CTRL:
240 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
241 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
242 status = BTMTK_WMT_ON_DONE;
243 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
244 status = BTMTK_WMT_ON_PROGRESS;
246 status = BTMTK_WMT_ON_UNDONE;
250 if (wmt_params->status)
251 *wmt_params->status = status;
254 kfree_skb(bdev->evt_skb);
255 bdev->evt_skb = NULL;
260 static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
263 struct mtkbtsdio_hdr *sdio_hdr;
266 /* Make sure that there are enough rooms for SDIO header */
267 if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
268 err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
274 /* Prepend MediaTek SDIO Specific Header */
275 skb_push(skb, sizeof(*sdio_hdr));
277 sdio_hdr = (void *)skb->data;
278 sdio_hdr->len = cpu_to_le16(skb->len);
279 sdio_hdr->reserved = cpu_to_le16(0);
280 sdio_hdr->bt_type = hci_skb_pkt_type(skb);
282 err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
283 round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
287 bdev->hdev->stat.byte_tx += skb->len;
294 skb_pull(skb, sizeof(*sdio_hdr));
299 static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
301 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
304 static void btmtksdio_tx_work(struct work_struct *work)
306 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
311 pm_runtime_get_sync(bdev->dev);
313 sdio_claim_host(bdev->func);
315 while ((skb = skb_dequeue(&bdev->txq))) {
316 err = btmtksdio_tx_packet(bdev, skb);
318 bdev->hdev->stat.err_tx++;
319 skb_queue_head(&bdev->txq, skb);
324 sdio_release_host(bdev->func);
326 pm_runtime_mark_last_busy(bdev->dev);
327 pm_runtime_put_autosuspend(bdev->dev);
330 static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
332 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
333 struct hci_event_hdr *hdr = (void *)skb->data;
336 /* Fix up the vendor event id with 0xff for vendor specific instead
337 * of 0xe4 so that event send via monitoring socket can be parsed
340 if (hdr->evt == 0xe4)
341 hdr->evt = HCI_EV_VENDOR;
343 /* When someone waits for the WMT event, the skb is being cloned
344 * and being processed the events from there then.
346 if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) {
347 bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
348 if (!bdev->evt_skb) {
354 err = hci_recv_frame(hdev, skb);
358 if (hdr->evt == HCI_EV_VENDOR) {
359 if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT,
361 /* Barrier to sync with other CPUs */
362 smp_mb__after_atomic();
363 wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT);
370 kfree_skb(bdev->evt_skb);
371 bdev->evt_skb = NULL;
377 static const struct h4_recv_pkt mtk_recv_pkts[] = {
378 { H4_RECV_ACL, .recv = hci_recv_frame },
379 { H4_RECV_SCO, .recv = hci_recv_frame },
380 { H4_RECV_EVENT, .recv = btmtksdio_recv_event },
383 static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
385 const struct h4_recv_pkt *pkts = mtk_recv_pkts;
386 int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
387 struct mtkbtsdio_hdr *sdio_hdr;
388 int err, i, pad_size;
392 if (rx_size < sizeof(*sdio_hdr))
395 /* A SDIO packet is exactly containing a Bluetooth packet */
396 skb = bt_skb_alloc(rx_size, GFP_KERNEL);
400 skb_put(skb, rx_size);
402 err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
406 sdio_hdr = (void *)skb->data;
408 /* We assume the default error as -EILSEQ simply to make the error path
413 if (rx_size != le16_to_cpu(sdio_hdr->len)) {
414 bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
418 hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
420 /* Remove MediaTek SDIO header */
421 skb_pull(skb, sizeof(*sdio_hdr));
423 /* We have to dig into the packet to get payload size and then know how
424 * many padding bytes at the tail, these padding bytes should be removed
425 * before the packet is indicated to the core layer.
427 for (i = 0; i < pkts_count; i++) {
428 if (sdio_hdr->bt_type == (&pkts[i])->type)
432 if (i >= pkts_count) {
433 bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
438 /* Remaining bytes cannot hold a header*/
439 if (skb->len < (&pkts[i])->hlen) {
440 bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
444 switch ((&pkts[i])->lsize) {
446 dlen = skb->data[(&pkts[i])->loff];
449 dlen = get_unaligned_le16(skb->data +
456 pad_size = skb->len - (&pkts[i])->hlen - dlen;
458 /* Remaining bytes cannot hold a payload */
460 bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
464 /* Remove padding bytes */
465 skb_trim(skb, skb->len - pad_size);
468 (&pkts[i])->recv(bdev->hdev, skb);
470 bdev->hdev->stat.byte_rx += rx_size;
480 static void btmtksdio_interrupt(struct sdio_func *func)
482 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
486 /* It is required that the host gets ownership from the device before
487 * accessing any register, however, if SDIO host is not being released,
488 * a potential deadlock probably happens in a circular wait between SDIO
489 * IRQ work and PM runtime work. So, we have to explicitly release SDIO
490 * host here and claim again after the PM runtime work is all done.
492 sdio_release_host(bdev->func);
494 pm_runtime_get_sync(bdev->dev);
496 sdio_claim_host(bdev->func);
498 /* Disable interrupt */
499 sdio_writel(func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
501 int_status = sdio_readl(func, MTK_REG_CHISR, NULL);
503 /* Ack an interrupt as soon as possible before any operation on
506 * Note that we don't ack any status during operations to avoid race
507 * condition between the host and the device such as it's possible to
508 * mistakenly ack RX_DONE for the next packet and then cause interrupts
509 * not be raised again but there is still pending data in the hardware
512 sdio_writel(func, int_status, MTK_REG_CHISR, NULL);
514 if (unlikely(!int_status))
515 bt_dev_err(bdev->hdev, "CHISR is 0");
517 if (int_status & FW_OWN_BACK_INT)
518 bt_dev_dbg(bdev->hdev, "Get fw own back");
520 if (int_status & TX_EMPTY)
521 schedule_work(&bdev->tx_work);
522 else if (unlikely(int_status & TX_FIFO_OVERFLOW))
523 bt_dev_warn(bdev->hdev, "Tx fifo overflow");
525 if (int_status & RX_DONE_INT) {
526 rx_size = (int_status & RX_PKT_LEN) >> 16;
528 if (btmtksdio_rx_packet(bdev, rx_size) < 0)
529 bdev->hdev->stat.err_rx++;
532 /* Enable interrupt */
533 sdio_writel(func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
535 pm_runtime_mark_last_busy(bdev->dev);
536 pm_runtime_put_autosuspend(bdev->dev);
539 static int btmtksdio_open(struct hci_dev *hdev)
541 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
545 sdio_claim_host(bdev->func);
547 err = sdio_enable_func(bdev->func);
549 goto err_release_host;
551 /* Get ownership from the device */
552 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
554 goto err_disable_func;
556 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
557 status & C_COM_DRV_OWN, 2000, 1000000);
559 bt_dev_err(bdev->hdev, "Cannot get ownership from device");
560 goto err_disable_func;
563 /* Disable interrupt & mask out all interrupt sources */
564 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
566 goto err_disable_func;
568 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
570 goto err_disable_func;
572 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
574 goto err_disable_func;
576 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
578 goto err_release_irq;
580 /* SDIO CMD 5 allows the SDIO device back to idle state an
581 * synchronous interrupt is supported in SDIO 4-bit mode
583 sdio_writel(bdev->func, SDIO_INT_CTL | SDIO_RE_INIT_EN,
584 MTK_REG_CSDIOCSR, &err);
586 goto err_release_irq;
588 /* Setup write-1-clear for CHISR register */
589 sdio_writel(bdev->func, C_INT_CLR_CTRL, MTK_REG_CHCR, &err);
591 goto err_release_irq;
593 /* Setup interrupt sources */
594 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
595 MTK_REG_CHIER, &err);
597 goto err_release_irq;
599 /* Enable interrupt */
600 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
602 goto err_release_irq;
604 sdio_release_host(bdev->func);
609 sdio_release_irq(bdev->func);
612 sdio_disable_func(bdev->func);
615 sdio_release_host(bdev->func);
620 static int btmtksdio_close(struct hci_dev *hdev)
622 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
626 sdio_claim_host(bdev->func);
628 /* Disable interrupt */
629 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
631 sdio_release_irq(bdev->func);
633 /* Return ownership to the device */
634 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, NULL);
636 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
637 !(status & C_COM_DRV_OWN), 2000, 1000000);
639 bt_dev_err(bdev->hdev, "Cannot return ownership to device");
641 sdio_disable_func(bdev->func);
643 sdio_release_host(bdev->func);
648 static int btmtksdio_flush(struct hci_dev *hdev)
650 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
652 skb_queue_purge(&bdev->txq);
654 cancel_work_sync(&bdev->tx_work);
659 static int btmtksdio_func_query(struct hci_dev *hdev)
661 struct btmtk_hci_wmt_params wmt_params;
665 /* Query whether the function is enabled */
666 wmt_params.op = MTK_WMT_FUNC_CTRL;
668 wmt_params.dlen = sizeof(param);
669 wmt_params.data = ¶m;
670 wmt_params.status = &status;
672 err = mtk_hci_wmt_sync(hdev, &wmt_params);
674 bt_dev_err(hdev, "Failed to query function status (%d)", err);
681 static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
683 struct btmtk_hci_wmt_params wmt_params;
684 const struct firmware *fw;
690 err = request_firmware(&fw, fwname, &hdev->dev);
692 bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
696 /* Power on data RAM the firmware relies on. */
698 wmt_params.op = MTK_WMT_FUNC_CTRL;
700 wmt_params.dlen = sizeof(param);
701 wmt_params.data = ¶m;
702 wmt_params.status = NULL;
704 err = mtk_hci_wmt_sync(hdev, &wmt_params);
706 bt_dev_err(hdev, "Failed to power on data RAM (%d)", err);
713 /* The size of patch header is 30 bytes, should be skip */
723 wmt_params.op = MTK_WMT_PATCH_DWNLD;
724 wmt_params.status = NULL;
726 while (fw_size > 0) {
727 dlen = min_t(int, 250, fw_size);
729 /* Tell device the position in sequence */
730 if (fw_size - dlen <= 0)
732 else if (fw_size < fw->size - 30)
735 wmt_params.flag = flag;
736 wmt_params.dlen = dlen;
737 wmt_params.data = fw_ptr;
739 err = mtk_hci_wmt_sync(hdev, &wmt_params);
741 bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
750 wmt_params.op = MTK_WMT_RST;
753 wmt_params.data = NULL;
754 wmt_params.status = NULL;
756 /* Activate funciton the firmware providing to */
757 err = mtk_hci_wmt_sync(hdev, &wmt_params);
759 bt_dev_err(hdev, "Failed to send wmt rst (%d)", err);
763 /* Wait a few moments for firmware activation done */
764 usleep_range(10000, 12000);
767 release_firmware(fw);
771 static int btmtksdio_setup(struct hci_dev *hdev)
773 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
774 struct btmtk_hci_wmt_params wmt_params;
775 ktime_t calltime, delta, rettime;
776 struct btmtk_tci_sleep tci_sleep;
777 unsigned long long duration;
782 calltime = ktime_get();
784 /* Query whether the firmware is already download */
785 wmt_params.op = MTK_WMT_SEMAPHORE;
788 wmt_params.data = NULL;
789 wmt_params.status = &status;
791 err = mtk_hci_wmt_sync(hdev, &wmt_params);
793 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
797 if (status == BTMTK_WMT_PATCH_DONE) {
798 bt_dev_info(hdev, "Firmware already downloaded");
799 goto ignore_setup_fw;
802 /* Setup a firmware which the device definitely requires */
803 err = mtk_setup_firmware(hdev, bdev->data->fwname);
808 /* Query whether the device is already enabled */
809 err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
810 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
812 /* -ETIMEDOUT happens */
816 /* The other errors happen in btusb_mtk_func_query */
820 if (status == BTMTK_WMT_ON_DONE) {
821 bt_dev_info(hdev, "function already on");
825 /* Enable Bluetooth protocol */
826 wmt_params.op = MTK_WMT_FUNC_CTRL;
828 wmt_params.dlen = sizeof(param);
829 wmt_params.data = ¶m;
830 wmt_params.status = NULL;
832 err = mtk_hci_wmt_sync(hdev, &wmt_params);
834 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
839 /* Apply the low power environment setup */
840 tci_sleep.mode = 0x5;
841 tci_sleep.duration = cpu_to_le16(0x640);
842 tci_sleep.host_duration = cpu_to_le16(0x640);
843 tci_sleep.host_wakeup_pin = 0;
844 tci_sleep.time_compensation = 0;
846 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
850 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
855 rettime = ktime_get();
856 delta = ktime_sub(rettime, calltime);
857 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
859 pm_runtime_set_autosuspend_delay(bdev->dev,
860 MTKBTSDIO_AUTOSUSPEND_DELAY);
861 pm_runtime_use_autosuspend(bdev->dev);
863 err = pm_runtime_set_active(bdev->dev);
867 /* Default forbid runtime auto suspend, that can be allowed by
868 * enable_autosuspend flag or the PM runtime entry under sysfs.
870 pm_runtime_forbid(bdev->dev);
871 pm_runtime_enable(bdev->dev);
873 if (enable_autosuspend)
874 pm_runtime_allow(bdev->dev);
876 bt_dev_info(hdev, "Device setup in %llu usecs", duration);
881 static int btmtksdio_shutdown(struct hci_dev *hdev)
883 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
884 struct btmtk_hci_wmt_params wmt_params;
888 /* Get back the state to be consistent with the state
889 * in btmtksdio_setup.
891 pm_runtime_get_sync(bdev->dev);
893 /* Disable the device */
894 wmt_params.op = MTK_WMT_FUNC_CTRL;
896 wmt_params.dlen = sizeof(param);
897 wmt_params.data = ¶m;
898 wmt_params.status = NULL;
900 err = mtk_hci_wmt_sync(hdev, &wmt_params);
902 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
906 pm_runtime_put_noidle(bdev->dev);
907 pm_runtime_disable(bdev->dev);
912 static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
914 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
916 switch (hci_skb_pkt_type(skb)) {
917 case HCI_COMMAND_PKT:
921 case HCI_ACLDATA_PKT:
925 case HCI_SCODATA_PKT:
933 skb_queue_tail(&bdev->txq, skb);
935 schedule_work(&bdev->tx_work);
940 static int btmtksdio_probe(struct sdio_func *func,
941 const struct sdio_device_id *id)
943 struct btmtksdio_dev *bdev;
944 struct hci_dev *hdev;
947 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
951 bdev->data = (void *)id->driver_data;
955 bdev->dev = &func->dev;
958 INIT_WORK(&bdev->tx_work, btmtksdio_tx_work);
959 skb_queue_head_init(&bdev->txq);
961 /* Initialize and register HCI device */
962 hdev = hci_alloc_dev();
964 dev_err(&func->dev, "Can't allocate HCI device\n");
970 hdev->bus = HCI_SDIO;
971 hci_set_drvdata(hdev, bdev);
973 hdev->open = btmtksdio_open;
974 hdev->close = btmtksdio_close;
975 hdev->flush = btmtksdio_flush;
976 hdev->setup = btmtksdio_setup;
977 hdev->shutdown = btmtksdio_shutdown;
978 hdev->send = btmtksdio_send_frame;
979 SET_HCIDEV_DEV(hdev, &func->dev);
981 hdev->manufacturer = 70;
982 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
984 err = hci_register_dev(hdev);
986 dev_err(&func->dev, "Can't register HCI device\n");
991 sdio_set_drvdata(func, bdev);
993 /* pm_runtime_enable would be done after the firmware is being
994 * downloaded because the core layer probably already enables
995 * runtime PM for this func such as the case host->caps &
996 * MMC_CAP_POWER_OFF_CARD.
998 if (pm_runtime_enabled(bdev->dev))
999 pm_runtime_disable(bdev->dev);
1001 /* As explaination in drivers/mmc/core/sdio_bus.c tells us:
1002 * Unbound SDIO functions are always suspended.
1003 * During probe, the function is set active and the usage count
1004 * is incremented. If the driver supports runtime PM,
1005 * it should call pm_runtime_put_noidle() in its probe routine and
1006 * pm_runtime_get_noresume() in its remove routine.
1008 * So, put a pm_runtime_put_noidle here !
1010 pm_runtime_put_noidle(bdev->dev);
1015 static void btmtksdio_remove(struct sdio_func *func)
1017 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
1018 struct hci_dev *hdev;
1023 /* Be consistent the state in btmtksdio_probe */
1024 pm_runtime_get_noresume(bdev->dev);
1028 sdio_set_drvdata(func, NULL);
1029 hci_unregister_dev(hdev);
1034 static int btmtksdio_runtime_suspend(struct device *dev)
1036 struct sdio_func *func = dev_to_sdio_func(dev);
1037 struct btmtksdio_dev *bdev;
1041 bdev = sdio_get_drvdata(func);
1045 sdio_claim_host(bdev->func);
1047 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
1051 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
1052 !(status & C_COM_DRV_OWN), 2000, 1000000);
1054 bt_dev_info(bdev->hdev, "status (%d) return ownership to device", err);
1056 sdio_release_host(bdev->func);
1061 static int btmtksdio_runtime_resume(struct device *dev)
1063 struct sdio_func *func = dev_to_sdio_func(dev);
1064 struct btmtksdio_dev *bdev;
1068 bdev = sdio_get_drvdata(func);
1072 sdio_claim_host(bdev->func);
1074 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
1078 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
1079 status & C_COM_DRV_OWN, 2000, 1000000);
1081 bt_dev_info(bdev->hdev, "status (%d) get ownership from device", err);
1083 sdio_release_host(bdev->func);
1088 static UNIVERSAL_DEV_PM_OPS(btmtksdio_pm_ops, btmtksdio_runtime_suspend,
1089 btmtksdio_runtime_resume, NULL);
1090 #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
1091 #else /* CONFIG_PM */
1092 #define BTMTKSDIO_PM_OPS NULL
1093 #endif /* CONFIG_PM */
1095 static struct sdio_driver btmtksdio_driver = {
1096 .name = "btmtksdio",
1097 .probe = btmtksdio_probe,
1098 .remove = btmtksdio_remove,
1099 .id_table = btmtksdio_table,
1101 .owner = THIS_MODULE,
1102 .pm = BTMTKSDIO_PM_OPS,
1106 module_sdio_driver(btmtksdio_driver);
1108 module_param(enable_autosuspend, bool, 0644);
1109 MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
1111 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1112 MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
1113 MODULE_VERSION(VERSION);
1114 MODULE_LICENSE("GPL");
1115 MODULE_FIRMWARE(FIRMWARE_MT7663);
1116 MODULE_FIRMWARE(FIRMWARE_MT7668);