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Merge tag 'pci-v6.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
[linux-block.git] / drivers / bluetooth / btmtksdio.c
... / ...
CommitLineData
1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2019 MediaTek Inc.
3
4/*
5 * Bluetooth support for MediaTek SDIO devices
6 *
7 * This file is written based on btsdio.c and btmtkuart.c.
8 *
9 * Author: Sean Wang <sean.wang@mediatek.com>
10 *
11 */
12
13#include <linux/unaligned.h>
14#include <linux/atomic.h>
15#include <linux/gpio/consumer.h>
16#include <linux/init.h>
17#include <linux/iopoll.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/of.h>
21#include <linux/pm_runtime.h>
22#include <linux/skbuff.h>
23#include <linux/usb.h>
24
25#include <linux/mmc/host.h>
26#include <linux/mmc/sdio_ids.h>
27#include <linux/mmc/sdio_func.h>
28
29#include <net/bluetooth/bluetooth.h>
30#include <net/bluetooth/hci_core.h>
31
32#include "h4_recv.h"
33#include "btmtk.h"
34
35#define VERSION "0.1"
36
37#define MTKBTSDIO_AUTOSUSPEND_DELAY 1000
38
39static bool enable_autosuspend = true;
40
41struct btmtksdio_data {
42 const char *fwname;
43 u16 chipid;
44 bool lp_mbox_supported;
45};
46
47static const struct btmtksdio_data mt7663_data = {
48 .fwname = FIRMWARE_MT7663,
49 .chipid = 0x7663,
50 .lp_mbox_supported = false,
51};
52
53static const struct btmtksdio_data mt7668_data = {
54 .fwname = FIRMWARE_MT7668,
55 .chipid = 0x7668,
56 .lp_mbox_supported = false,
57};
58
59static const struct btmtksdio_data mt7921_data = {
60 .fwname = FIRMWARE_MT7961,
61 .chipid = 0x7921,
62 .lp_mbox_supported = true,
63};
64
65static const struct sdio_device_id btmtksdio_table[] = {
66 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663),
67 .driver_data = (kernel_ulong_t)&mt7663_data },
68 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668),
69 .driver_data = (kernel_ulong_t)&mt7668_data },
70 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7961),
71 .driver_data = (kernel_ulong_t)&mt7921_data },
72 { } /* Terminating entry */
73};
74MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
75
76#define MTK_REG_CHLPCR 0x4 /* W1S */
77#define C_INT_EN_SET BIT(0)
78#define C_INT_EN_CLR BIT(1)
79#define C_FW_OWN_REQ_SET BIT(8) /* For write */
80#define C_COM_DRV_OWN BIT(8) /* For read */
81#define C_FW_OWN_REQ_CLR BIT(9)
82
83#define MTK_REG_CSDIOCSR 0x8
84#define SDIO_RE_INIT_EN BIT(0)
85#define SDIO_INT_CTL BIT(2)
86
87#define MTK_REG_CHCR 0xc
88#define C_INT_CLR_CTRL BIT(1)
89#define BT_RST_DONE BIT(8)
90
91/* CHISR have the same bits field definition with CHIER */
92#define MTK_REG_CHISR 0x10
93#define MTK_REG_CHIER 0x14
94#define FW_OWN_BACK_INT BIT(0)
95#define RX_DONE_INT BIT(1)
96#define TX_EMPTY BIT(2)
97#define TX_FIFO_OVERFLOW BIT(8)
98#define FW_MAILBOX_INT BIT(15)
99#define INT_MASK GENMASK(15, 0)
100#define RX_PKT_LEN GENMASK(31, 16)
101
102#define MTK_REG_CSICR 0xc0
103#define CSICR_CLR_MBOX_ACK BIT(0)
104#define MTK_REG_PH2DSM0R 0xc4
105#define PH2DSM0R_DRIVER_OWN BIT(0)
106#define MTK_REG_PD2HRM0R 0xdc
107#define PD2HRM0R_DRV_OWN BIT(0)
108
109#define MTK_REG_CTDR 0x18
110
111#define MTK_REG_CRDR 0x1c
112
113#define MTK_REG_CRPLR 0x24
114
115#define MTK_SDIO_BLOCK_SIZE 256
116
117#define BTMTKSDIO_TX_WAIT_VND_EVT 1
118#define BTMTKSDIO_HW_TX_READY 2
119#define BTMTKSDIO_FUNC_ENABLED 3
120#define BTMTKSDIO_PATCH_ENABLED 4
121#define BTMTKSDIO_HW_RESET_ACTIVE 5
122#define BTMTKSDIO_BT_WAKE_ENABLED 6
123
124struct mtkbtsdio_hdr {
125 __le16 len;
126 __le16 reserved;
127 u8 bt_type;
128} __packed;
129
130struct btmtksdio_dev {
131 struct hci_dev *hdev;
132 struct sdio_func *func;
133 struct device *dev;
134
135 struct work_struct txrx_work;
136 unsigned long tx_state;
137 struct sk_buff_head txq;
138
139 struct sk_buff *evt_skb;
140
141 const struct btmtksdio_data *data;
142
143 struct gpio_desc *reset;
144};
145
146static int mtk_hci_wmt_sync(struct hci_dev *hdev,
147 struct btmtk_hci_wmt_params *wmt_params)
148{
149 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
150 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
151 struct btmtk_hci_wmt_evt_reg *wmt_evt_reg;
152 u32 hlen, status = BTMTK_WMT_INVALID;
153 struct btmtk_hci_wmt_evt *wmt_evt;
154 struct btmtk_hci_wmt_cmd *wc;
155 struct btmtk_wmt_hdr *hdr;
156 int err;
157
158 /* Send the WMT command and wait until the WMT event returns */
159 hlen = sizeof(*hdr) + wmt_params->dlen;
160 if (hlen > 255)
161 return -EINVAL;
162
163 wc = kzalloc(hlen, GFP_KERNEL);
164 if (!wc)
165 return -ENOMEM;
166
167 hdr = &wc->hdr;
168 hdr->dir = 1;
169 hdr->op = wmt_params->op;
170 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
171 hdr->flag = wmt_params->flag;
172 memcpy(wc->data, wmt_params->data, wmt_params->dlen);
173
174 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
175
176 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
177 if (err < 0) {
178 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
179 goto err_free_wc;
180 }
181
182 /* The vendor specific WMT commands are all answered by a vendor
183 * specific event and will not have the Command Status or Command
184 * Complete as with usual HCI command flow control.
185 *
186 * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
187 * state to be cleared. The driver specific event receive routine
188 * will clear that state and with that indicate completion of the
189 * WMT command.
190 */
191 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT,
192 TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
193 if (err == -EINTR) {
194 bt_dev_err(hdev, "Execution of wmt command interrupted");
195 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
196 goto err_free_wc;
197 }
198
199 if (err) {
200 bt_dev_err(hdev, "Execution of wmt command timed out");
201 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
202 err = -ETIMEDOUT;
203 goto err_free_wc;
204 }
205
206 /* Parse and handle the return WMT event */
207 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
208 if (wmt_evt->whdr.op != hdr->op) {
209 bt_dev_err(hdev, "Wrong op received %d expected %d",
210 wmt_evt->whdr.op, hdr->op);
211 err = -EIO;
212 goto err_free_skb;
213 }
214
215 switch (wmt_evt->whdr.op) {
216 case BTMTK_WMT_SEMAPHORE:
217 if (wmt_evt->whdr.flag == 2)
218 status = BTMTK_WMT_PATCH_UNDONE;
219 else
220 status = BTMTK_WMT_PATCH_DONE;
221 break;
222 case BTMTK_WMT_FUNC_CTRL:
223 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
224 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
225 status = BTMTK_WMT_ON_DONE;
226 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
227 status = BTMTK_WMT_ON_PROGRESS;
228 else
229 status = BTMTK_WMT_ON_UNDONE;
230 break;
231 case BTMTK_WMT_PATCH_DWNLD:
232 if (wmt_evt->whdr.flag == 2)
233 status = BTMTK_WMT_PATCH_DONE;
234 else if (wmt_evt->whdr.flag == 1)
235 status = BTMTK_WMT_PATCH_PROGRESS;
236 else
237 status = BTMTK_WMT_PATCH_UNDONE;
238 break;
239 case BTMTK_WMT_REGISTER:
240 wmt_evt_reg = (struct btmtk_hci_wmt_evt_reg *)wmt_evt;
241 if (le16_to_cpu(wmt_evt->whdr.dlen) == 12)
242 status = le32_to_cpu(wmt_evt_reg->val);
243 break;
244 }
245
246 if (wmt_params->status)
247 *wmt_params->status = status;
248
249err_free_skb:
250 kfree_skb(bdev->evt_skb);
251 bdev->evt_skb = NULL;
252err_free_wc:
253 kfree(wc);
254
255 return err;
256}
257
258static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
259 struct sk_buff *skb)
260{
261 struct mtkbtsdio_hdr *sdio_hdr;
262 int err;
263
264 /* Make sure that there are enough rooms for SDIO header */
265 if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
266 err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
267 GFP_ATOMIC);
268 if (err < 0)
269 return err;
270 }
271
272 /* Prepend MediaTek SDIO Specific Header */
273 skb_push(skb, sizeof(*sdio_hdr));
274
275 sdio_hdr = (void *)skb->data;
276 sdio_hdr->len = cpu_to_le16(skb->len);
277 sdio_hdr->reserved = cpu_to_le16(0);
278 sdio_hdr->bt_type = hci_skb_pkt_type(skb);
279
280 clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
281 err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
282 round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
283 if (err < 0)
284 goto err_skb_pull;
285
286 bdev->hdev->stat.byte_tx += skb->len;
287
288 kfree_skb(skb);
289
290 return 0;
291
292err_skb_pull:
293 skb_pull(skb, sizeof(*sdio_hdr));
294
295 return err;
296}
297
298static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
299{
300 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
301}
302
303static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev)
304{
305 return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL);
306}
307
308static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev)
309{
310 return sdio_readl(bdev->func, MTK_REG_CHCR, NULL);
311}
312
313static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev)
314{
315 u32 status;
316 int err;
317
318 sdio_claim_host(bdev->func);
319
320 if (bdev->data->lp_mbox_supported &&
321 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) {
322 sdio_writel(bdev->func, CSICR_CLR_MBOX_ACK, MTK_REG_CSICR,
323 &err);
324 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
325 status, !(status & PD2HRM0R_DRV_OWN),
326 2000, 1000000);
327 if (err < 0) {
328 bt_dev_err(bdev->hdev, "mailbox ACK not cleared");
329 goto out;
330 }
331 }
332
333 /* Return ownership to the device */
334 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
335 if (err < 0)
336 goto out;
337
338 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
339 !(status & C_COM_DRV_OWN), 2000, 1000000);
340
341out:
342 sdio_release_host(bdev->func);
343
344 if (err < 0)
345 bt_dev_err(bdev->hdev, "Cannot return ownership to device");
346
347 return err;
348}
349
350static int btmtksdio_drv_pmctrl(struct btmtksdio_dev *bdev)
351{
352 u32 status;
353 int err;
354
355 sdio_claim_host(bdev->func);
356
357 /* Get ownership from the device */
358 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
359 if (err < 0)
360 goto out;
361
362 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
363 status & C_COM_DRV_OWN, 2000, 1000000);
364
365 if (!err && bdev->data->lp_mbox_supported &&
366 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state))
367 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
368 status, status & PD2HRM0R_DRV_OWN,
369 2000, 1000000);
370
371out:
372 sdio_release_host(bdev->func);
373
374 if (err < 0)
375 bt_dev_err(bdev->hdev, "Cannot get ownership from device");
376
377 return err;
378}
379
380static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
381{
382 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
383 struct hci_event_hdr *hdr = (void *)skb->data;
384 u8 evt = hdr->evt;
385 int err;
386
387 /* When someone waits for the WMT event, the skb is being cloned
388 * and being processed the events from there then.
389 */
390 if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) {
391 bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
392 if (!bdev->evt_skb) {
393 err = -ENOMEM;
394 goto err_out;
395 }
396 }
397
398 err = hci_recv_frame(hdev, skb);
399 if (err < 0)
400 goto err_free_skb;
401
402 if (evt == HCI_EV_WMT) {
403 if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT,
404 &bdev->tx_state)) {
405 /* Barrier to sync with other CPUs */
406 smp_mb__after_atomic();
407 wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT);
408 }
409 }
410
411 return 0;
412
413err_free_skb:
414 kfree_skb(bdev->evt_skb);
415 bdev->evt_skb = NULL;
416
417err_out:
418 return err;
419}
420
421static int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
422{
423 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
424 u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
425
426 switch (handle) {
427 case 0xfc6f:
428 /* Firmware dump from device: when the firmware hangs, the
429 * device can no longer suspend and thus disable auto-suspend.
430 */
431 pm_runtime_forbid(bdev->dev);
432 fallthrough;
433 case 0x05ff:
434 case 0x05fe:
435 /* Firmware debug logging */
436 return hci_recv_diag(hdev, skb);
437 }
438
439 return hci_recv_frame(hdev, skb);
440}
441
442static const struct h4_recv_pkt mtk_recv_pkts[] = {
443 { H4_RECV_ACL, .recv = btmtksdio_recv_acl },
444 { H4_RECV_SCO, .recv = hci_recv_frame },
445 { H4_RECV_EVENT, .recv = btmtksdio_recv_event },
446};
447
448static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
449{
450 const struct h4_recv_pkt *pkts = mtk_recv_pkts;
451 int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
452 struct mtkbtsdio_hdr *sdio_hdr;
453 int err, i, pad_size;
454 struct sk_buff *skb;
455 u16 dlen;
456
457 if (rx_size < sizeof(*sdio_hdr))
458 return -EILSEQ;
459
460 /* A SDIO packet is exactly containing a Bluetooth packet */
461 skb = bt_skb_alloc(rx_size, GFP_KERNEL);
462 if (!skb)
463 return -ENOMEM;
464
465 skb_put(skb, rx_size);
466
467 err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
468 if (err < 0)
469 goto err_kfree_skb;
470
471 sdio_hdr = (void *)skb->data;
472
473 /* We assume the default error as -EILSEQ simply to make the error path
474 * be cleaner.
475 */
476 err = -EILSEQ;
477
478 if (rx_size != le16_to_cpu(sdio_hdr->len)) {
479 bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
480 goto err_kfree_skb;
481 }
482
483 hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
484
485 /* Remove MediaTek SDIO header */
486 skb_pull(skb, sizeof(*sdio_hdr));
487
488 /* We have to dig into the packet to get payload size and then know how
489 * many padding bytes at the tail, these padding bytes should be removed
490 * before the packet is indicated to the core layer.
491 */
492 for (i = 0; i < pkts_count; i++) {
493 if (sdio_hdr->bt_type == (&pkts[i])->type)
494 break;
495 }
496
497 if (i >= pkts_count) {
498 bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
499 sdio_hdr->bt_type);
500 goto err_kfree_skb;
501 }
502
503 /* Remaining bytes cannot hold a header*/
504 if (skb->len < (&pkts[i])->hlen) {
505 bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
506 goto err_kfree_skb;
507 }
508
509 switch ((&pkts[i])->lsize) {
510 case 1:
511 dlen = skb->data[(&pkts[i])->loff];
512 break;
513 case 2:
514 dlen = get_unaligned_le16(skb->data +
515 (&pkts[i])->loff);
516 break;
517 default:
518 goto err_kfree_skb;
519 }
520
521 pad_size = skb->len - (&pkts[i])->hlen - dlen;
522
523 /* Remaining bytes cannot hold a payload */
524 if (pad_size < 0) {
525 bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
526 goto err_kfree_skb;
527 }
528
529 /* Remove padding bytes */
530 skb_trim(skb, skb->len - pad_size);
531
532 /* Complete frame */
533 (&pkts[i])->recv(bdev->hdev, skb);
534
535 bdev->hdev->stat.byte_rx += rx_size;
536
537 return 0;
538
539err_kfree_skb:
540 kfree_skb(skb);
541
542 return err;
543}
544
545static void btmtksdio_txrx_work(struct work_struct *work)
546{
547 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
548 txrx_work);
549 unsigned long txrx_timeout;
550 u32 int_status, rx_size;
551 struct sk_buff *skb;
552 int err;
553
554 pm_runtime_get_sync(bdev->dev);
555
556 sdio_claim_host(bdev->func);
557
558 /* Disable interrupt */
559 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
560
561 txrx_timeout = jiffies + 5 * HZ;
562
563 do {
564 int_status = sdio_readl(bdev->func, MTK_REG_CHISR, NULL);
565
566 /* Ack an interrupt as soon as possible before any operation on
567 * hardware.
568 *
569 * Note that we don't ack any status during operations to avoid race
570 * condition between the host and the device such as it's possible to
571 * mistakenly ack RX_DONE for the next packet and then cause interrupts
572 * not be raised again but there is still pending data in the hardware
573 * FIFO.
574 */
575 sdio_writel(bdev->func, int_status, MTK_REG_CHISR, NULL);
576 int_status &= INT_MASK;
577
578 if ((int_status & FW_MAILBOX_INT) &&
579 bdev->data->chipid == 0x7921) {
580 sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN,
581 MTK_REG_PH2DSM0R, NULL);
582 }
583
584 if (int_status & FW_OWN_BACK_INT)
585 bt_dev_dbg(bdev->hdev, "Get fw own back");
586
587 if (int_status & TX_EMPTY)
588 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
589
590 else if (unlikely(int_status & TX_FIFO_OVERFLOW))
591 bt_dev_warn(bdev->hdev, "Tx fifo overflow");
592
593 if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) {
594 skb = skb_dequeue(&bdev->txq);
595 if (skb) {
596 err = btmtksdio_tx_packet(bdev, skb);
597 if (err < 0) {
598 bdev->hdev->stat.err_tx++;
599 skb_queue_head(&bdev->txq, skb);
600 }
601 }
602 }
603
604 if (int_status & RX_DONE_INT) {
605 rx_size = sdio_readl(bdev->func, MTK_REG_CRPLR, NULL);
606 rx_size = (rx_size & RX_PKT_LEN) >> 16;
607 if (btmtksdio_rx_packet(bdev, rx_size) < 0)
608 bdev->hdev->stat.err_rx++;
609 }
610 } while (int_status || time_is_before_jiffies(txrx_timeout));
611
612 /* Enable interrupt */
613 if (bdev->func->irq_handler)
614 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
615
616 sdio_release_host(bdev->func);
617
618 pm_runtime_mark_last_busy(bdev->dev);
619 pm_runtime_put_autosuspend(bdev->dev);
620}
621
622static void btmtksdio_interrupt(struct sdio_func *func)
623{
624 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
625
626 if (test_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state)) {
627 if (bdev->hdev->suspended)
628 pm_wakeup_event(bdev->dev, 0);
629 clear_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
630 }
631
632 /* Disable interrupt */
633 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
634
635 schedule_work(&bdev->txrx_work);
636}
637
638static int btmtksdio_open(struct hci_dev *hdev)
639{
640 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
641 u32 val;
642 int err;
643
644 sdio_claim_host(bdev->func);
645
646 err = sdio_enable_func(bdev->func);
647 if (err < 0)
648 goto err_release_host;
649
650 set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
651
652 err = btmtksdio_drv_pmctrl(bdev);
653 if (err < 0)
654 goto err_disable_func;
655
656 /* Disable interrupt & mask out all interrupt sources */
657 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
658 if (err < 0)
659 goto err_disable_func;
660
661 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
662 if (err < 0)
663 goto err_disable_func;
664
665 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
666 if (err < 0)
667 goto err_disable_func;
668
669 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
670 if (err < 0)
671 goto err_release_irq;
672
673 /* SDIO CMD 5 allows the SDIO device back to idle state an
674 * synchronous interrupt is supported in SDIO 4-bit mode
675 */
676 val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err);
677 if (err < 0)
678 goto err_release_irq;
679
680 val |= SDIO_INT_CTL;
681 sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err);
682 if (err < 0)
683 goto err_release_irq;
684
685 /* Explicitly set write-1-clear method */
686 val = sdio_readl(bdev->func, MTK_REG_CHCR, &err);
687 if (err < 0)
688 goto err_release_irq;
689
690 val |= C_INT_CLR_CTRL;
691 sdio_writel(bdev->func, val, MTK_REG_CHCR, &err);
692 if (err < 0)
693 goto err_release_irq;
694
695 /* Setup interrupt sources */
696 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
697 MTK_REG_CHIER, &err);
698 if (err < 0)
699 goto err_release_irq;
700
701 /* Enable interrupt */
702 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
703 if (err < 0)
704 goto err_release_irq;
705
706 sdio_release_host(bdev->func);
707
708 return 0;
709
710err_release_irq:
711 sdio_release_irq(bdev->func);
712
713err_disable_func:
714 sdio_disable_func(bdev->func);
715
716err_release_host:
717 sdio_release_host(bdev->func);
718
719 return err;
720}
721
722static int btmtksdio_close(struct hci_dev *hdev)
723{
724 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
725
726 /* Skip btmtksdio_close if BTMTKSDIO_FUNC_ENABLED isn't set */
727 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
728 return 0;
729
730 sdio_claim_host(bdev->func);
731
732 /* Disable interrupt */
733 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
734
735 sdio_release_irq(bdev->func);
736
737 cancel_work_sync(&bdev->txrx_work);
738
739 btmtksdio_fw_pmctrl(bdev);
740
741 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
742 sdio_disable_func(bdev->func);
743
744 sdio_release_host(bdev->func);
745
746 return 0;
747}
748
749static int btmtksdio_flush(struct hci_dev *hdev)
750{
751 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
752
753 skb_queue_purge(&bdev->txq);
754
755 cancel_work_sync(&bdev->txrx_work);
756
757 return 0;
758}
759
760static int btmtksdio_func_query(struct hci_dev *hdev)
761{
762 struct btmtk_hci_wmt_params wmt_params;
763 int status, err;
764 u8 param = 0;
765
766 /* Query whether the function is enabled */
767 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
768 wmt_params.flag = 4;
769 wmt_params.dlen = sizeof(param);
770 wmt_params.data = &param;
771 wmt_params.status = &status;
772
773 err = mtk_hci_wmt_sync(hdev, &wmt_params);
774 if (err < 0) {
775 bt_dev_err(hdev, "Failed to query function status (%d)", err);
776 return err;
777 }
778
779 return status;
780}
781
782static int mt76xx_setup(struct hci_dev *hdev, const char *fwname)
783{
784 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
785 struct btmtk_hci_wmt_params wmt_params;
786 struct btmtk_tci_sleep tci_sleep;
787 struct sk_buff *skb;
788 int err, status;
789 u8 param = 0x1;
790
791 /* Query whether the firmware is already download */
792 wmt_params.op = BTMTK_WMT_SEMAPHORE;
793 wmt_params.flag = 1;
794 wmt_params.dlen = 0;
795 wmt_params.data = NULL;
796 wmt_params.status = &status;
797
798 err = mtk_hci_wmt_sync(hdev, &wmt_params);
799 if (err < 0) {
800 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
801 return err;
802 }
803
804 if (status == BTMTK_WMT_PATCH_DONE) {
805 bt_dev_info(hdev, "Firmware already downloaded");
806 goto ignore_setup_fw;
807 }
808
809 /* Setup a firmware which the device definitely requires */
810 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync);
811 if (err < 0)
812 return err;
813
814ignore_setup_fw:
815 /* Query whether the device is already enabled */
816 err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
817 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
818 2000, 5000000);
819 /* -ETIMEDOUT happens */
820 if (err < 0)
821 return err;
822
823 /* The other errors happen in btusb_mtk_func_query */
824 if (status < 0)
825 return status;
826
827 if (status == BTMTK_WMT_ON_DONE) {
828 bt_dev_info(hdev, "function already on");
829 goto ignore_func_on;
830 }
831
832 /* Enable Bluetooth protocol */
833 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
834 wmt_params.flag = 0;
835 wmt_params.dlen = sizeof(param);
836 wmt_params.data = &param;
837 wmt_params.status = NULL;
838
839 err = mtk_hci_wmt_sync(hdev, &wmt_params);
840 if (err < 0) {
841 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
842 return err;
843 }
844
845 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
846
847ignore_func_on:
848 /* Apply the low power environment setup */
849 tci_sleep.mode = 0x5;
850 tci_sleep.duration = cpu_to_le16(0x640);
851 tci_sleep.host_duration = cpu_to_le16(0x640);
852 tci_sleep.host_wakeup_pin = 0;
853 tci_sleep.time_compensation = 0;
854
855 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
856 HCI_INIT_TIMEOUT);
857 if (IS_ERR(skb)) {
858 err = PTR_ERR(skb);
859 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
860 return err;
861 }
862 kfree_skb(skb);
863
864 return 0;
865}
866
867static int mt79xx_setup(struct hci_dev *hdev, const char *fwname)
868{
869 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
870 struct btmtk_hci_wmt_params wmt_params;
871 u8 param = 0x1;
872 int err;
873
874 err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync);
875 if (err < 0) {
876 bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err);
877 return err;
878 }
879
880 err = btmtksdio_fw_pmctrl(bdev);
881 if (err < 0)
882 return err;
883
884 err = btmtksdio_drv_pmctrl(bdev);
885 if (err < 0)
886 return err;
887
888 /* Enable Bluetooth protocol */
889 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
890 wmt_params.flag = 0;
891 wmt_params.dlen = sizeof(param);
892 wmt_params.data = &param;
893 wmt_params.status = NULL;
894
895 err = mtk_hci_wmt_sync(hdev, &wmt_params);
896 if (err < 0) {
897 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
898 return err;
899 }
900
901 hci_set_msft_opcode(hdev, 0xFD30);
902 hci_set_aosp_capable(hdev);
903 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
904
905 return err;
906}
907
908static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
909{
910 struct btmtk_hci_wmt_params wmt_params;
911 struct reg_read_cmd reg_read = {
912 .type = 1,
913 .num = 1,
914 };
915 u32 status;
916 int err;
917
918 reg_read.addr = cpu_to_le32(reg);
919 wmt_params.op = BTMTK_WMT_REGISTER;
920 wmt_params.flag = BTMTK_WMT_REG_READ;
921 wmt_params.dlen = sizeof(reg_read);
922 wmt_params.data = &reg_read;
923 wmt_params.status = &status;
924
925 err = mtk_hci_wmt_sync(hdev, &wmt_params);
926 if (err < 0) {
927 bt_dev_err(hdev, "Failed to read reg (%d)", err);
928 return err;
929 }
930
931 *val = status;
932
933 return err;
934}
935
936static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask)
937{
938 struct btmtk_hci_wmt_params wmt_params;
939 const struct reg_write_cmd reg_write = {
940 .type = 1,
941 .num = 1,
942 .addr = cpu_to_le32(reg),
943 .data = cpu_to_le32(val),
944 .mask = cpu_to_le32(mask),
945 };
946 int err, status;
947
948 wmt_params.op = BTMTK_WMT_REGISTER;
949 wmt_params.flag = BTMTK_WMT_REG_WRITE;
950 wmt_params.dlen = sizeof(reg_write);
951 wmt_params.data = &reg_write;
952 wmt_params.status = &status;
953
954 err = mtk_hci_wmt_sync(hdev, &wmt_params);
955 if (err < 0)
956 bt_dev_err(hdev, "Failed to write reg (%d)", err);
957
958 return err;
959}
960
961static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
962{
963 /* uses 1 as data path id for all the usecases */
964 *data_path_id = 1;
965 return 0;
966}
967
968static int btmtksdio_get_codec_config_data(struct hci_dev *hdev,
969 __u8 link, struct bt_codec *codec,
970 __u8 *ven_len, __u8 **ven_data)
971{
972 int err = 0;
973
974 if (!ven_data || !ven_len)
975 return -EINVAL;
976
977 *ven_len = 0;
978 *ven_data = NULL;
979
980 if (link != ESCO_LINK) {
981 bt_dev_err(hdev, "Invalid link type(%u)", link);
982 return -EINVAL;
983 }
984
985 *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL);
986 if (!*ven_data) {
987 err = -ENOMEM;
988 goto error;
989 }
990
991 /* supports only CVSD and mSBC offload codecs */
992 switch (codec->id) {
993 case 0x02:
994 **ven_data = 0x00;
995 break;
996 case 0x05:
997 **ven_data = 0x01;
998 break;
999 default:
1000 err = -EINVAL;
1001 bt_dev_err(hdev, "Invalid codec id(%u)", codec->id);
1002 goto error;
1003 }
1004 /* codec and its capabilities are pre-defined to ids
1005 * preset id = 0x00 represents CVSD codec with sampling rate 8K
1006 * preset id = 0x01 represents mSBC codec with sampling rate 16K
1007 */
1008 *ven_len = sizeof(__u8);
1009 return err;
1010
1011error:
1012 kfree(*ven_data);
1013 *ven_data = NULL;
1014 return err;
1015}
1016
1017static int btmtksdio_sco_setting(struct hci_dev *hdev)
1018{
1019 const struct btmtk_sco sco_setting = {
1020 .clock_config = 0x49,
1021 .channel_format_config = 0x80,
1022 };
1023 struct sk_buff *skb;
1024 u32 val;
1025 int err;
1026
1027 /* Enable SCO over I2S/PCM for MediaTek chipset */
1028 skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting),
1029 &sco_setting, HCI_CMD_TIMEOUT);
1030 if (IS_ERR(skb))
1031 return PTR_ERR(skb);
1032
1033 kfree_skb(skb);
1034
1035 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val);
1036 if (err < 0)
1037 return err;
1038
1039 val |= 0x11000000;
1040 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0);
1041 if (err < 0)
1042 return err;
1043
1044 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1045 if (err < 0)
1046 return err;
1047
1048 val |= 0x00000101;
1049 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1050 if (err < 0)
1051 return err;
1052
1053 hdev->get_data_path_id = btmtksdio_get_data_path_id;
1054 hdev->get_codec_config_data = btmtksdio_get_codec_config_data;
1055
1056 return err;
1057}
1058
1059static int btmtksdio_reset_setting(struct hci_dev *hdev)
1060{
1061 int err;
1062 u32 val;
1063
1064 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1065 if (err < 0)
1066 return err;
1067
1068 val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */
1069 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1070 if (err < 0)
1071 return err;
1072
1073 err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val);
1074 if (err < 0)
1075 return err;
1076
1077 val |= MT7921_BTSYS_RST_WITH_GPIO;
1078 return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0);
1079}
1080
1081static int btmtksdio_setup(struct hci_dev *hdev)
1082{
1083 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1084 ktime_t calltime, delta, rettime;
1085 unsigned long long duration;
1086 char fwname[64];
1087 int err, dev_id;
1088 u32 fw_version = 0, val;
1089
1090 calltime = ktime_get();
1091 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
1092
1093 switch (bdev->data->chipid) {
1094 case 0x7921:
1095 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) {
1096 err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS,
1097 &val);
1098 if (err < 0)
1099 return err;
1100
1101 val &= ~BT_DL_STATE;
1102 err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS,
1103 val, ~0);
1104 if (err < 0)
1105 return err;
1106
1107 btmtksdio_fw_pmctrl(bdev);
1108 msleep(20);
1109 btmtksdio_drv_pmctrl(bdev);
1110
1111 clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state);
1112 }
1113
1114 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id);
1115 if (err < 0) {
1116 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1117 return err;
1118 }
1119
1120 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version);
1121 if (err < 0) {
1122 bt_dev_err(hdev, "Failed to get fw version (%d)", err);
1123 return err;
1124 }
1125
1126 btmtk_fw_get_filename(fwname, sizeof(fwname), dev_id,
1127 fw_version, 0);
1128
1129 snprintf(fwname, sizeof(fwname),
1130 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
1131 dev_id & 0xffff, (fw_version & 0xff) + 1);
1132 err = mt79xx_setup(hdev, fwname);
1133 if (err < 0)
1134 return err;
1135
1136 /* Enable SCO over I2S/PCM */
1137 err = btmtksdio_sco_setting(hdev);
1138 if (err < 0) {
1139 bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err);
1140 return err;
1141 }
1142
1143 /* Enable WBS with mSBC codec */
1144 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
1145
1146 /* Enable GPIO reset mechanism */
1147 if (bdev->reset) {
1148 err = btmtksdio_reset_setting(hdev);
1149 if (err < 0) {
1150 bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err);
1151 devm_gpiod_put(bdev->dev, bdev->reset);
1152 bdev->reset = NULL;
1153 }
1154 }
1155
1156 break;
1157 case 0x7663:
1158 case 0x7668:
1159 err = mt76xx_setup(hdev, bdev->data->fwname);
1160 if (err < 0)
1161 return err;
1162 break;
1163 default:
1164 return -ENODEV;
1165 }
1166
1167 rettime = ktime_get();
1168 delta = ktime_sub(rettime, calltime);
1169 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1170
1171 pm_runtime_set_autosuspend_delay(bdev->dev,
1172 MTKBTSDIO_AUTOSUSPEND_DELAY);
1173 pm_runtime_use_autosuspend(bdev->dev);
1174
1175 err = pm_runtime_set_active(bdev->dev);
1176 if (err < 0)
1177 return err;
1178
1179 /* Default forbid runtime auto suspend, that can be allowed by
1180 * enable_autosuspend flag or the PM runtime entry under sysfs.
1181 */
1182 pm_runtime_forbid(bdev->dev);
1183 pm_runtime_enable(bdev->dev);
1184
1185 if (enable_autosuspend)
1186 pm_runtime_allow(bdev->dev);
1187
1188 bt_dev_info(hdev, "Device setup in %llu usecs", duration);
1189
1190 return 0;
1191}
1192
1193static int btmtksdio_shutdown(struct hci_dev *hdev)
1194{
1195 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1196 struct btmtk_hci_wmt_params wmt_params;
1197 u8 param = 0x0;
1198 int err;
1199
1200 /* Get back the state to be consistent with the state
1201 * in btmtksdio_setup.
1202 */
1203 pm_runtime_get_sync(bdev->dev);
1204
1205 /* wmt command only works until the reset is complete */
1206 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1207 goto ignore_wmt_cmd;
1208
1209 /* Disable the device */
1210 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1211 wmt_params.flag = 0;
1212 wmt_params.dlen = sizeof(param);
1213 wmt_params.data = &param;
1214 wmt_params.status = NULL;
1215
1216 err = mtk_hci_wmt_sync(hdev, &wmt_params);
1217 if (err < 0) {
1218 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1219 return err;
1220 }
1221
1222ignore_wmt_cmd:
1223 pm_runtime_put_noidle(bdev->dev);
1224 pm_runtime_disable(bdev->dev);
1225
1226 return 0;
1227}
1228
1229static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1230{
1231 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1232
1233 switch (hci_skb_pkt_type(skb)) {
1234 case HCI_COMMAND_PKT:
1235 hdev->stat.cmd_tx++;
1236 break;
1237
1238 case HCI_ACLDATA_PKT:
1239 hdev->stat.acl_tx++;
1240 break;
1241
1242 case HCI_SCODATA_PKT:
1243 hdev->stat.sco_tx++;
1244 break;
1245
1246 default:
1247 return -EILSEQ;
1248 }
1249
1250 skb_queue_tail(&bdev->txq, skb);
1251
1252 schedule_work(&bdev->txrx_work);
1253
1254 return 0;
1255}
1256
1257static void btmtksdio_reset(struct hci_dev *hdev)
1258{
1259 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1260 u32 status;
1261 int err;
1262
1263 if (!bdev->reset || bdev->data->chipid != 0x7921)
1264 return;
1265
1266 pm_runtime_get_sync(bdev->dev);
1267
1268 if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1269 return;
1270
1271 sdio_claim_host(bdev->func);
1272
1273 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
1274 skb_queue_purge(&bdev->txq);
1275 cancel_work_sync(&bdev->txrx_work);
1276
1277 gpiod_set_value_cansleep(bdev->reset, 1);
1278 msleep(100);
1279 gpiod_set_value_cansleep(bdev->reset, 0);
1280
1281 err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status,
1282 status & BT_RST_DONE, 100000, 2000000);
1283 if (err < 0) {
1284 bt_dev_err(hdev, "Failed to reset (%d)", err);
1285 goto err;
1286 }
1287
1288 clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
1289err:
1290 sdio_release_host(bdev->func);
1291
1292 pm_runtime_put_noidle(bdev->dev);
1293 pm_runtime_disable(bdev->dev);
1294
1295 hci_reset_dev(hdev);
1296}
1297
1298static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
1299{
1300 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1301
1302 return device_may_wakeup(bdev->dev);
1303}
1304
1305static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
1306{
1307 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1308 bool may_wakeup = device_may_wakeup(bdev->dev);
1309 const struct btmtk_wakeon bt_awake = {
1310 .mode = 0x1,
1311 .gpo = 0,
1312 .active_high = 0x1,
1313 .enable_delay = cpu_to_le16(0xc80),
1314 .wakeup_delay = cpu_to_le16(0x20),
1315 };
1316
1317 if (may_wakeup && bdev->data->chipid == 0x7921) {
1318 struct sk_buff *skb;
1319
1320 skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake),
1321 &bt_awake, HCI_CMD_TIMEOUT);
1322 if (IS_ERR(skb))
1323 may_wakeup = false;
1324 else
1325 kfree_skb(skb);
1326 }
1327
1328 return may_wakeup;
1329}
1330
1331static int btmtksdio_probe(struct sdio_func *func,
1332 const struct sdio_device_id *id)
1333{
1334 struct btmtksdio_dev *bdev;
1335 struct hci_dev *hdev;
1336 struct device_node *old_node;
1337 bool restore_node;
1338 int err;
1339
1340 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
1341 if (!bdev)
1342 return -ENOMEM;
1343
1344 bdev->data = (void *)id->driver_data;
1345 if (!bdev->data)
1346 return -ENODEV;
1347
1348 bdev->dev = &func->dev;
1349 bdev->func = func;
1350
1351 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work);
1352 skb_queue_head_init(&bdev->txq);
1353
1354 /* Initialize and register HCI device */
1355 hdev = hci_alloc_dev();
1356 if (!hdev) {
1357 dev_err(&func->dev, "Can't allocate HCI device\n");
1358 return -ENOMEM;
1359 }
1360
1361 bdev->hdev = hdev;
1362
1363 hdev->bus = HCI_SDIO;
1364 hci_set_drvdata(hdev, bdev);
1365
1366 hdev->open = btmtksdio_open;
1367 hdev->close = btmtksdio_close;
1368 hdev->reset = btmtksdio_reset;
1369 hdev->flush = btmtksdio_flush;
1370 hdev->setup = btmtksdio_setup;
1371 hdev->shutdown = btmtksdio_shutdown;
1372 hdev->send = btmtksdio_send_frame;
1373 hdev->wakeup = btmtksdio_sdio_wakeup;
1374 /*
1375 * If SDIO controller supports wake on Bluetooth, sending a wakeon
1376 * command is not necessary.
1377 */
1378 if (device_can_wakeup(func->card->host->parent))
1379 hdev->wakeup = btmtksdio_sdio_inband_wakeup;
1380 else
1381 hdev->wakeup = btmtksdio_sdio_wakeup;
1382 hdev->set_bdaddr = btmtk_set_bdaddr;
1383
1384 SET_HCIDEV_DEV(hdev, &func->dev);
1385
1386 hdev->manufacturer = 70;
1387 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
1388
1389 sdio_set_drvdata(func, bdev);
1390
1391 err = hci_register_dev(hdev);
1392 if (err < 0) {
1393 dev_err(&func->dev, "Can't register HCI device\n");
1394 hci_free_dev(hdev);
1395 return err;
1396 }
1397
1398 /* pm_runtime_enable would be done after the firmware is being
1399 * downloaded because the core layer probably already enables
1400 * runtime PM for this func such as the case host->caps &
1401 * MMC_CAP_POWER_OFF_CARD.
1402 */
1403 if (pm_runtime_enabled(bdev->dev))
1404 pm_runtime_disable(bdev->dev);
1405
1406 /* As explanation in drivers/mmc/core/sdio_bus.c tells us:
1407 * Unbound SDIO functions are always suspended.
1408 * During probe, the function is set active and the usage count
1409 * is incremented. If the driver supports runtime PM,
1410 * it should call pm_runtime_put_noidle() in its probe routine and
1411 * pm_runtime_get_noresume() in its remove routine.
1412 *
1413 * So, put a pm_runtime_put_noidle here !
1414 */
1415 pm_runtime_put_noidle(bdev->dev);
1416
1417 err = devm_device_init_wakeup(bdev->dev);
1418 if (err)
1419 bt_dev_err(hdev, "failed to initialize device wakeup");
1420
1421 restore_node = false;
1422 if (!of_device_is_compatible(bdev->dev->of_node, "mediatek,mt7921s-bluetooth")) {
1423 restore_node = true;
1424 old_node = bdev->dev->of_node;
1425 bdev->dev->of_node = of_find_compatible_node(NULL, NULL,
1426 "mediatek,mt7921s-bluetooth");
1427 }
1428
1429 bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset",
1430 GPIOD_OUT_LOW);
1431 if (IS_ERR(bdev->reset))
1432 err = PTR_ERR(bdev->reset);
1433
1434 if (restore_node) {
1435 of_node_put(bdev->dev->of_node);
1436 bdev->dev->of_node = old_node;
1437 }
1438
1439 return err;
1440}
1441
1442static void btmtksdio_remove(struct sdio_func *func)
1443{
1444 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
1445 struct hci_dev *hdev;
1446
1447 if (!bdev)
1448 return;
1449
1450 hdev = bdev->hdev;
1451
1452 /* Make sure to call btmtksdio_close before removing sdio card */
1453 if (test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1454 btmtksdio_close(hdev);
1455
1456 /* Be consistent the state in btmtksdio_probe */
1457 pm_runtime_get_noresume(bdev->dev);
1458
1459 sdio_set_drvdata(func, NULL);
1460 hci_unregister_dev(hdev);
1461 hci_free_dev(hdev);
1462}
1463
1464#ifdef CONFIG_PM
1465static int btmtksdio_runtime_suspend(struct device *dev)
1466{
1467 struct sdio_func *func = dev_to_sdio_func(dev);
1468 struct btmtksdio_dev *bdev;
1469 int err;
1470
1471 bdev = sdio_get_drvdata(func);
1472 if (!bdev)
1473 return 0;
1474
1475 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1476 return 0;
1477
1478 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1479
1480 err = btmtksdio_fw_pmctrl(bdev);
1481
1482 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err);
1483
1484 return err;
1485}
1486
1487static int btmtksdio_system_suspend(struct device *dev)
1488{
1489 struct sdio_func *func = dev_to_sdio_func(dev);
1490 struct btmtksdio_dev *bdev;
1491
1492 bdev = sdio_get_drvdata(func);
1493 if (!bdev)
1494 return 0;
1495
1496 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1497 return 0;
1498
1499 set_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
1500
1501 return btmtksdio_runtime_suspend(dev);
1502}
1503
1504static int btmtksdio_runtime_resume(struct device *dev)
1505{
1506 struct sdio_func *func = dev_to_sdio_func(dev);
1507 struct btmtksdio_dev *bdev;
1508 int err;
1509
1510 bdev = sdio_get_drvdata(func);
1511 if (!bdev)
1512 return 0;
1513
1514 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1515 return 0;
1516
1517 err = btmtksdio_drv_pmctrl(bdev);
1518
1519 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err);
1520
1521 return err;
1522}
1523
1524static int btmtksdio_system_resume(struct device *dev)
1525{
1526 return btmtksdio_runtime_resume(dev);
1527}
1528
1529static const struct dev_pm_ops btmtksdio_pm_ops = {
1530 SYSTEM_SLEEP_PM_OPS(btmtksdio_system_suspend, btmtksdio_system_resume)
1531 RUNTIME_PM_OPS(btmtksdio_runtime_suspend, btmtksdio_runtime_resume, NULL)
1532};
1533
1534#define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
1535#else /* CONFIG_PM */
1536#define BTMTKSDIO_PM_OPS NULL
1537#endif /* CONFIG_PM */
1538
1539static struct sdio_driver btmtksdio_driver = {
1540 .name = "btmtksdio",
1541 .probe = btmtksdio_probe,
1542 .remove = btmtksdio_remove,
1543 .id_table = btmtksdio_table,
1544 .drv = {
1545 .pm = BTMTKSDIO_PM_OPS,
1546 }
1547};
1548
1549module_sdio_driver(btmtksdio_driver);
1550
1551module_param(enable_autosuspend, bool, 0644);
1552MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
1553
1554MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1555MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
1556MODULE_VERSION(VERSION);
1557MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)