Loading...
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 <asm/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
24#include <linux/mmc/host.h>
25#include <linux/mmc/sdio_ids.h>
26#include <linux/mmc/sdio_func.h>
27
28#include <net/bluetooth/bluetooth.h>
29#include <net/bluetooth/hci_core.h>
30
31#include "h4_recv.h"
32#include "btmtk.h"
33
34#define VERSION "0.1"
35
36#define MTKBTSDIO_AUTOSUSPEND_DELAY 1000
37
38static bool enable_autosuspend = true;
39
40struct btmtksdio_data {
41 const char *fwname;
42 u16 chipid;
43 bool lp_mbox_supported;
44};
45
46static const struct btmtksdio_data mt7663_data = {
47 .fwname = FIRMWARE_MT7663,
48 .chipid = 0x7663,
49 .lp_mbox_supported = false,
50};
51
52static const struct btmtksdio_data mt7668_data = {
53 .fwname = FIRMWARE_MT7668,
54 .chipid = 0x7668,
55 .lp_mbox_supported = false,
56};
57
58static const struct btmtksdio_data mt7921_data = {
59 .fwname = FIRMWARE_MT7961,
60 .chipid = 0x7921,
61 .lp_mbox_supported = true,
62};
63
64static const struct sdio_device_id btmtksdio_table[] = {
65 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663),
66 .driver_data = (kernel_ulong_t)&mt7663_data },
67 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668),
68 .driver_data = (kernel_ulong_t)&mt7668_data },
69 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7961),
70 .driver_data = (kernel_ulong_t)&mt7921_data },
71 { } /* Terminating entry */
72};
73MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
74
75#define MTK_REG_CHLPCR 0x4 /* W1S */
76#define C_INT_EN_SET BIT(0)
77#define C_INT_EN_CLR BIT(1)
78#define C_FW_OWN_REQ_SET BIT(8) /* For write */
79#define C_COM_DRV_OWN BIT(8) /* For read */
80#define C_FW_OWN_REQ_CLR BIT(9)
81
82#define MTK_REG_CSDIOCSR 0x8
83#define SDIO_RE_INIT_EN BIT(0)
84#define SDIO_INT_CTL BIT(2)
85
86#define MTK_REG_CHCR 0xc
87#define C_INT_CLR_CTRL BIT(1)
88#define BT_RST_DONE BIT(8)
89
90/* CHISR have the same bits field definition with CHIER */
91#define MTK_REG_CHISR 0x10
92#define MTK_REG_CHIER 0x14
93#define FW_OWN_BACK_INT BIT(0)
94#define RX_DONE_INT BIT(1)
95#define TX_EMPTY BIT(2)
96#define TX_FIFO_OVERFLOW BIT(8)
97#define FW_MAILBOX_INT BIT(15)
98#define INT_MASK GENMASK(15, 0)
99#define RX_PKT_LEN GENMASK(31, 16)
100
101#define MTK_REG_CSICR 0xc0
102#define CSICR_CLR_MBOX_ACK BIT(0)
103#define MTK_REG_PH2DSM0R 0xc4
104#define PH2DSM0R_DRIVER_OWN BIT(0)
105#define MTK_REG_PD2HRM0R 0xdc
106#define PD2HRM0R_DRV_OWN BIT(0)
107
108#define MTK_REG_CTDR 0x18
109
110#define MTK_REG_CRDR 0x1c
111
112#define MTK_REG_CRPLR 0x24
113
114#define MTK_SDIO_BLOCK_SIZE 256
115
116#define BTMTKSDIO_TX_WAIT_VND_EVT 1
117#define BTMTKSDIO_HW_TX_READY 2
118#define BTMTKSDIO_FUNC_ENABLED 3
119#define BTMTKSDIO_PATCH_ENABLED 4
120#define BTMTKSDIO_HW_RESET_ACTIVE 5
121#define BTMTKSDIO_BT_WAKE_ENABLED 6
122
123struct mtkbtsdio_hdr {
124 __le16 len;
125 __le16 reserved;
126 u8 bt_type;
127} __packed;
128
129struct btmtksdio_dev {
130 struct hci_dev *hdev;
131 struct sdio_func *func;
132 struct device *dev;
133
134 struct work_struct txrx_work;
135 unsigned long tx_state;
136 struct sk_buff_head txq;
137
138 struct sk_buff *evt_skb;
139
140 const struct btmtksdio_data *data;
141
142 struct gpio_desc *reset;
143};
144
145static int mtk_hci_wmt_sync(struct hci_dev *hdev,
146 struct btmtk_hci_wmt_params *wmt_params)
147{
148 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
149 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
150 struct btmtk_hci_wmt_evt_reg *wmt_evt_reg;
151 u32 hlen, status = BTMTK_WMT_INVALID;
152 struct btmtk_hci_wmt_evt *wmt_evt;
153 struct btmtk_hci_wmt_cmd *wc;
154 struct btmtk_wmt_hdr *hdr;
155 int err;
156
157 /* Send the WMT command and wait until the WMT event returns */
158 hlen = sizeof(*hdr) + wmt_params->dlen;
159 if (hlen > 255)
160 return -EINVAL;
161
162 wc = kzalloc(hlen, GFP_KERNEL);
163 if (!wc)
164 return -ENOMEM;
165
166 hdr = &wc->hdr;
167 hdr->dir = 1;
168 hdr->op = wmt_params->op;
169 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
170 hdr->flag = wmt_params->flag;
171 memcpy(wc->data, wmt_params->data, wmt_params->dlen);
172
173 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
174
175 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
176 if (err < 0) {
177 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
178 goto err_free_wc;
179 }
180
181 /* The vendor specific WMT commands are all answered by a vendor
182 * specific event and will not have the Command Status or Command
183 * Complete as with usual HCI command flow control.
184 *
185 * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
186 * state to be cleared. The driver specific event receive routine
187 * will clear that state and with that indicate completion of the
188 * WMT command.
189 */
190 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT,
191 TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
192 if (err == -EINTR) {
193 bt_dev_err(hdev, "Execution of wmt command interrupted");
194 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
195 goto err_free_wc;
196 }
197
198 if (err) {
199 bt_dev_err(hdev, "Execution of wmt command timed out");
200 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
201 err = -ETIMEDOUT;
202 goto err_free_wc;
203 }
204
205 /* Parse and handle the return WMT event */
206 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
207 if (wmt_evt->whdr.op != hdr->op) {
208 bt_dev_err(hdev, "Wrong op received %d expected %d",
209 wmt_evt->whdr.op, hdr->op);
210 err = -EIO;
211 goto err_free_skb;
212 }
213
214 switch (wmt_evt->whdr.op) {
215 case BTMTK_WMT_SEMAPHORE:
216 if (wmt_evt->whdr.flag == 2)
217 status = BTMTK_WMT_PATCH_UNDONE;
218 else
219 status = BTMTK_WMT_PATCH_DONE;
220 break;
221 case BTMTK_WMT_FUNC_CTRL:
222 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
223 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
224 status = BTMTK_WMT_ON_DONE;
225 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
226 status = BTMTK_WMT_ON_PROGRESS;
227 else
228 status = BTMTK_WMT_ON_UNDONE;
229 break;
230 case BTMTK_WMT_PATCH_DWNLD:
231 if (wmt_evt->whdr.flag == 2)
232 status = BTMTK_WMT_PATCH_DONE;
233 else if (wmt_evt->whdr.flag == 1)
234 status = BTMTK_WMT_PATCH_PROGRESS;
235 else
236 status = BTMTK_WMT_PATCH_UNDONE;
237 break;
238 case BTMTK_WMT_REGISTER:
239 wmt_evt_reg = (struct btmtk_hci_wmt_evt_reg *)wmt_evt;
240 if (le16_to_cpu(wmt_evt->whdr.dlen) == 12)
241 status = le32_to_cpu(wmt_evt_reg->val);
242 break;
243 }
244
245 if (wmt_params->status)
246 *wmt_params->status = status;
247
248err_free_skb:
249 kfree_skb(bdev->evt_skb);
250 bdev->evt_skb = NULL;
251err_free_wc:
252 kfree(wc);
253
254 return err;
255}
256
257static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
258 struct sk_buff *skb)
259{
260 struct mtkbtsdio_hdr *sdio_hdr;
261 int err;
262
263 /* Make sure that there are enough rooms for SDIO header */
264 if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
265 err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
266 GFP_ATOMIC);
267 if (err < 0)
268 return err;
269 }
270
271 /* Prepend MediaTek SDIO Specific Header */
272 skb_push(skb, sizeof(*sdio_hdr));
273
274 sdio_hdr = (void *)skb->data;
275 sdio_hdr->len = cpu_to_le16(skb->len);
276 sdio_hdr->reserved = cpu_to_le16(0);
277 sdio_hdr->bt_type = hci_skb_pkt_type(skb);
278
279 clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
280 err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
281 round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
282 if (err < 0)
283 goto err_skb_pull;
284
285 bdev->hdev->stat.byte_tx += skb->len;
286
287 kfree_skb(skb);
288
289 return 0;
290
291err_skb_pull:
292 skb_pull(skb, sizeof(*sdio_hdr));
293
294 return err;
295}
296
297static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
298{
299 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
300}
301
302static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev)
303{
304 return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL);
305}
306
307static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev)
308{
309 return sdio_readl(bdev->func, MTK_REG_CHCR, NULL);
310}
311
312static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev)
313{
314 u32 status;
315 int err;
316
317 sdio_claim_host(bdev->func);
318
319 if (bdev->data->lp_mbox_supported &&
320 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) {
321 sdio_writel(bdev->func, CSICR_CLR_MBOX_ACK, MTK_REG_CSICR,
322 &err);
323 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
324 status, !(status & PD2HRM0R_DRV_OWN),
325 2000, 1000000);
326 if (err < 0) {
327 bt_dev_err(bdev->hdev, "mailbox ACK not cleared");
328 goto out;
329 }
330 }
331
332 /* Return ownership to the device */
333 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
334 if (err < 0)
335 goto out;
336
337 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
338 !(status & C_COM_DRV_OWN), 2000, 1000000);
339
340out:
341 sdio_release_host(bdev->func);
342
343 if (err < 0)
344 bt_dev_err(bdev->hdev, "Cannot return ownership to device");
345
346 return err;
347}
348
349static int btmtksdio_drv_pmctrl(struct btmtksdio_dev *bdev)
350{
351 u32 status;
352 int err;
353
354 sdio_claim_host(bdev->func);
355
356 /* Get ownership from the device */
357 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
358 if (err < 0)
359 goto out;
360
361 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
362 status & C_COM_DRV_OWN, 2000, 1000000);
363
364 if (!err && bdev->data->lp_mbox_supported &&
365 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state))
366 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
367 status, status & PD2HRM0R_DRV_OWN,
368 2000, 1000000);
369
370out:
371 sdio_release_host(bdev->func);
372
373 if (err < 0)
374 bt_dev_err(bdev->hdev, "Cannot get ownership from device");
375
376 return err;
377}
378
379static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
380{
381 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
382 struct hci_event_hdr *hdr = (void *)skb->data;
383 u8 evt = hdr->evt;
384 int err;
385
386 /* When someone waits for the WMT event, the skb is being cloned
387 * and being processed the events from there then.
388 */
389 if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) {
390 bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
391 if (!bdev->evt_skb) {
392 err = -ENOMEM;
393 goto err_out;
394 }
395 }
396
397 err = hci_recv_frame(hdev, skb);
398 if (err < 0)
399 goto err_free_skb;
400
401 if (evt == HCI_EV_WMT) {
402 if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT,
403 &bdev->tx_state)) {
404 /* Barrier to sync with other CPUs */
405 smp_mb__after_atomic();
406 wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT);
407 }
408 }
409
410 return 0;
411
412err_free_skb:
413 kfree_skb(bdev->evt_skb);
414 bdev->evt_skb = NULL;
415
416err_out:
417 return err;
418}
419
420static int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
421{
422 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
423 u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
424
425 switch (handle) {
426 case 0xfc6f:
427 /* Firmware dump from device: when the firmware hangs, the
428 * device can no longer suspend and thus disable auto-suspend.
429 */
430 pm_runtime_forbid(bdev->dev);
431 fallthrough;
432 case 0x05ff:
433 case 0x05fe:
434 /* Firmware debug logging */
435 return hci_recv_diag(hdev, skb);
436 }
437
438 return hci_recv_frame(hdev, skb);
439}
440
441static const struct h4_recv_pkt mtk_recv_pkts[] = {
442 { H4_RECV_ACL, .recv = btmtksdio_recv_acl },
443 { H4_RECV_SCO, .recv = hci_recv_frame },
444 { H4_RECV_EVENT, .recv = btmtksdio_recv_event },
445};
446
447static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
448{
449 const struct h4_recv_pkt *pkts = mtk_recv_pkts;
450 int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
451 struct mtkbtsdio_hdr *sdio_hdr;
452 int err, i, pad_size;
453 struct sk_buff *skb;
454 u16 dlen;
455
456 if (rx_size < sizeof(*sdio_hdr))
457 return -EILSEQ;
458
459 /* A SDIO packet is exactly containing a Bluetooth packet */
460 skb = bt_skb_alloc(rx_size, GFP_KERNEL);
461 if (!skb)
462 return -ENOMEM;
463
464 skb_put(skb, rx_size);
465
466 err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
467 if (err < 0)
468 goto err_kfree_skb;
469
470 sdio_hdr = (void *)skb->data;
471
472 /* We assume the default error as -EILSEQ simply to make the error path
473 * be cleaner.
474 */
475 err = -EILSEQ;
476
477 if (rx_size != le16_to_cpu(sdio_hdr->len)) {
478 bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
479 goto err_kfree_skb;
480 }
481
482 hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
483
484 /* Remove MediaTek SDIO header */
485 skb_pull(skb, sizeof(*sdio_hdr));
486
487 /* We have to dig into the packet to get payload size and then know how
488 * many padding bytes at the tail, these padding bytes should be removed
489 * before the packet is indicated to the core layer.
490 */
491 for (i = 0; i < pkts_count; i++) {
492 if (sdio_hdr->bt_type == (&pkts[i])->type)
493 break;
494 }
495
496 if (i >= pkts_count) {
497 bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
498 sdio_hdr->bt_type);
499 goto err_kfree_skb;
500 }
501
502 /* Remaining bytes cannot hold a header*/
503 if (skb->len < (&pkts[i])->hlen) {
504 bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
505 goto err_kfree_skb;
506 }
507
508 switch ((&pkts[i])->lsize) {
509 case 1:
510 dlen = skb->data[(&pkts[i])->loff];
511 break;
512 case 2:
513 dlen = get_unaligned_le16(skb->data +
514 (&pkts[i])->loff);
515 break;
516 default:
517 goto err_kfree_skb;
518 }
519
520 pad_size = skb->len - (&pkts[i])->hlen - dlen;
521
522 /* Remaining bytes cannot hold a payload */
523 if (pad_size < 0) {
524 bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
525 goto err_kfree_skb;
526 }
527
528 /* Remove padding bytes */
529 skb_trim(skb, skb->len - pad_size);
530
531 /* Complete frame */
532 (&pkts[i])->recv(bdev->hdev, skb);
533
534 bdev->hdev->stat.byte_rx += rx_size;
535
536 return 0;
537
538err_kfree_skb:
539 kfree_skb(skb);
540
541 return err;
542}
543
544static void btmtksdio_txrx_work(struct work_struct *work)
545{
546 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
547 txrx_work);
548 unsigned long txrx_timeout;
549 u32 int_status, rx_size;
550 struct sk_buff *skb;
551 int err;
552
553 pm_runtime_get_sync(bdev->dev);
554
555 sdio_claim_host(bdev->func);
556
557 /* Disable interrupt */
558 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
559
560 txrx_timeout = jiffies + 5 * HZ;
561
562 do {
563 int_status = sdio_readl(bdev->func, MTK_REG_CHISR, NULL);
564
565 /* Ack an interrupt as soon as possible before any operation on
566 * hardware.
567 *
568 * Note that we don't ack any status during operations to avoid race
569 * condition between the host and the device such as it's possible to
570 * mistakenly ack RX_DONE for the next packet and then cause interrupts
571 * not be raised again but there is still pending data in the hardware
572 * FIFO.
573 */
574 sdio_writel(bdev->func, int_status, MTK_REG_CHISR, NULL);
575 int_status &= INT_MASK;
576
577 if ((int_status & FW_MAILBOX_INT) &&
578 bdev->data->chipid == 0x7921) {
579 sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN,
580 MTK_REG_PH2DSM0R, NULL);
581 }
582
583 if (int_status & FW_OWN_BACK_INT)
584 bt_dev_dbg(bdev->hdev, "Get fw own back");
585
586 if (int_status & TX_EMPTY)
587 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
588
589 else if (unlikely(int_status & TX_FIFO_OVERFLOW))
590 bt_dev_warn(bdev->hdev, "Tx fifo overflow");
591
592 if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) {
593 skb = skb_dequeue(&bdev->txq);
594 if (skb) {
595 err = btmtksdio_tx_packet(bdev, skb);
596 if (err < 0) {
597 bdev->hdev->stat.err_tx++;
598 skb_queue_head(&bdev->txq, skb);
599 }
600 }
601 }
602
603 if (int_status & RX_DONE_INT) {
604 rx_size = sdio_readl(bdev->func, MTK_REG_CRPLR, NULL);
605 rx_size = (rx_size & RX_PKT_LEN) >> 16;
606 if (btmtksdio_rx_packet(bdev, rx_size) < 0)
607 bdev->hdev->stat.err_rx++;
608 }
609 } while (int_status || time_is_before_jiffies(txrx_timeout));
610
611 /* Enable interrupt */
612 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
613
614 sdio_release_host(bdev->func);
615
616 pm_runtime_mark_last_busy(bdev->dev);
617 pm_runtime_put_autosuspend(bdev->dev);
618}
619
620static void btmtksdio_interrupt(struct sdio_func *func)
621{
622 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
623
624 if (test_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state)) {
625 if (bdev->hdev->suspended)
626 pm_wakeup_event(bdev->dev, 0);
627 clear_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
628 }
629
630 /* Disable interrupt */
631 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
632
633 schedule_work(&bdev->txrx_work);
634}
635
636static int btmtksdio_open(struct hci_dev *hdev)
637{
638 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
639 u32 val;
640 int err;
641
642 sdio_claim_host(bdev->func);
643
644 err = sdio_enable_func(bdev->func);
645 if (err < 0)
646 goto err_release_host;
647
648 set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
649
650 err = btmtksdio_drv_pmctrl(bdev);
651 if (err < 0)
652 goto err_disable_func;
653
654 /* Disable interrupt & mask out all interrupt sources */
655 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
656 if (err < 0)
657 goto err_disable_func;
658
659 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
660 if (err < 0)
661 goto err_disable_func;
662
663 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
664 if (err < 0)
665 goto err_disable_func;
666
667 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
668 if (err < 0)
669 goto err_release_irq;
670
671 /* SDIO CMD 5 allows the SDIO device back to idle state an
672 * synchronous interrupt is supported in SDIO 4-bit mode
673 */
674 val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err);
675 if (err < 0)
676 goto err_release_irq;
677
678 val |= SDIO_INT_CTL;
679 sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err);
680 if (err < 0)
681 goto err_release_irq;
682
683 /* Explitly set write-1-clear method */
684 val = sdio_readl(bdev->func, MTK_REG_CHCR, &err);
685 if (err < 0)
686 goto err_release_irq;
687
688 val |= C_INT_CLR_CTRL;
689 sdio_writel(bdev->func, val, MTK_REG_CHCR, &err);
690 if (err < 0)
691 goto err_release_irq;
692
693 /* Setup interrupt sources */
694 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
695 MTK_REG_CHIER, &err);
696 if (err < 0)
697 goto err_release_irq;
698
699 /* Enable interrupt */
700 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
701 if (err < 0)
702 goto err_release_irq;
703
704 sdio_release_host(bdev->func);
705
706 return 0;
707
708err_release_irq:
709 sdio_release_irq(bdev->func);
710
711err_disable_func:
712 sdio_disable_func(bdev->func);
713
714err_release_host:
715 sdio_release_host(bdev->func);
716
717 return err;
718}
719
720static int btmtksdio_close(struct hci_dev *hdev)
721{
722 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
723
724 sdio_claim_host(bdev->func);
725
726 /* Disable interrupt */
727 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
728
729 sdio_release_irq(bdev->func);
730
731 cancel_work_sync(&bdev->txrx_work);
732
733 btmtksdio_fw_pmctrl(bdev);
734
735 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
736 sdio_disable_func(bdev->func);
737
738 sdio_release_host(bdev->func);
739
740 return 0;
741}
742
743static int btmtksdio_flush(struct hci_dev *hdev)
744{
745 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
746
747 skb_queue_purge(&bdev->txq);
748
749 cancel_work_sync(&bdev->txrx_work);
750
751 return 0;
752}
753
754static int btmtksdio_func_query(struct hci_dev *hdev)
755{
756 struct btmtk_hci_wmt_params wmt_params;
757 int status, err;
758 u8 param = 0;
759
760 /* Query whether the function is enabled */
761 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
762 wmt_params.flag = 4;
763 wmt_params.dlen = sizeof(param);
764 wmt_params.data = ¶m;
765 wmt_params.status = &status;
766
767 err = mtk_hci_wmt_sync(hdev, &wmt_params);
768 if (err < 0) {
769 bt_dev_err(hdev, "Failed to query function status (%d)", err);
770 return err;
771 }
772
773 return status;
774}
775
776static int mt76xx_setup(struct hci_dev *hdev, const char *fwname)
777{
778 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
779 struct btmtk_hci_wmt_params wmt_params;
780 struct btmtk_tci_sleep tci_sleep;
781 struct sk_buff *skb;
782 int err, status;
783 u8 param = 0x1;
784
785 /* Query whether the firmware is already download */
786 wmt_params.op = BTMTK_WMT_SEMAPHORE;
787 wmt_params.flag = 1;
788 wmt_params.dlen = 0;
789 wmt_params.data = NULL;
790 wmt_params.status = &status;
791
792 err = mtk_hci_wmt_sync(hdev, &wmt_params);
793 if (err < 0) {
794 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
795 return err;
796 }
797
798 if (status == BTMTK_WMT_PATCH_DONE) {
799 bt_dev_info(hdev, "Firmware already downloaded");
800 goto ignore_setup_fw;
801 }
802
803 /* Setup a firmware which the device definitely requires */
804 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync);
805 if (err < 0)
806 return err;
807
808ignore_setup_fw:
809 /* Query whether the device is already enabled */
810 err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
811 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
812 2000, 5000000);
813 /* -ETIMEDOUT happens */
814 if (err < 0)
815 return err;
816
817 /* The other errors happen in btusb_mtk_func_query */
818 if (status < 0)
819 return status;
820
821 if (status == BTMTK_WMT_ON_DONE) {
822 bt_dev_info(hdev, "function already on");
823 goto ignore_func_on;
824 }
825
826 /* Enable Bluetooth protocol */
827 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
828 wmt_params.flag = 0;
829 wmt_params.dlen = sizeof(param);
830 wmt_params.data = ¶m;
831 wmt_params.status = NULL;
832
833 err = mtk_hci_wmt_sync(hdev, &wmt_params);
834 if (err < 0) {
835 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
836 return err;
837 }
838
839 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
840
841ignore_func_on:
842 /* Apply the low power environment setup */
843 tci_sleep.mode = 0x5;
844 tci_sleep.duration = cpu_to_le16(0x640);
845 tci_sleep.host_duration = cpu_to_le16(0x640);
846 tci_sleep.host_wakeup_pin = 0;
847 tci_sleep.time_compensation = 0;
848
849 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
850 HCI_INIT_TIMEOUT);
851 if (IS_ERR(skb)) {
852 err = PTR_ERR(skb);
853 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
854 return err;
855 }
856 kfree_skb(skb);
857
858 return 0;
859}
860
861static int mt79xx_setup(struct hci_dev *hdev, const char *fwname)
862{
863 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
864 struct btmtk_hci_wmt_params wmt_params;
865 u8 param = 0x1;
866 int err;
867
868 err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync);
869 if (err < 0) {
870 bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err);
871 return err;
872 }
873
874 err = btmtksdio_fw_pmctrl(bdev);
875 if (err < 0)
876 return err;
877
878 err = btmtksdio_drv_pmctrl(bdev);
879 if (err < 0)
880 return err;
881
882 /* Enable Bluetooth protocol */
883 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
884 wmt_params.flag = 0;
885 wmt_params.dlen = sizeof(param);
886 wmt_params.data = ¶m;
887 wmt_params.status = NULL;
888
889 err = mtk_hci_wmt_sync(hdev, &wmt_params);
890 if (err < 0) {
891 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
892 return err;
893 }
894
895 hci_set_msft_opcode(hdev, 0xFD30);
896 hci_set_aosp_capable(hdev);
897 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
898
899 return err;
900}
901
902static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
903{
904 struct btmtk_hci_wmt_params wmt_params;
905 struct reg_read_cmd reg_read = {
906 .type = 1,
907 .num = 1,
908 };
909 u32 status;
910 int err;
911
912 reg_read.addr = cpu_to_le32(reg);
913 wmt_params.op = BTMTK_WMT_REGISTER;
914 wmt_params.flag = BTMTK_WMT_REG_READ;
915 wmt_params.dlen = sizeof(reg_read);
916 wmt_params.data = ®_read;
917 wmt_params.status = &status;
918
919 err = mtk_hci_wmt_sync(hdev, &wmt_params);
920 if (err < 0) {
921 bt_dev_err(hdev, "Failed to read reg (%d)", err);
922 return err;
923 }
924
925 *val = status;
926
927 return err;
928}
929
930static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask)
931{
932 struct btmtk_hci_wmt_params wmt_params;
933 const struct reg_write_cmd reg_write = {
934 .type = 1,
935 .num = 1,
936 .addr = cpu_to_le32(reg),
937 .data = cpu_to_le32(val),
938 .mask = cpu_to_le32(mask),
939 };
940 int err, status;
941
942 wmt_params.op = BTMTK_WMT_REGISTER;
943 wmt_params.flag = BTMTK_WMT_REG_WRITE;
944 wmt_params.dlen = sizeof(reg_write);
945 wmt_params.data = ®_write;
946 wmt_params.status = &status;
947
948 err = mtk_hci_wmt_sync(hdev, &wmt_params);
949 if (err < 0)
950 bt_dev_err(hdev, "Failed to write reg (%d)", err);
951
952 return err;
953}
954
955static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
956{
957 /* uses 1 as data path id for all the usecases */
958 *data_path_id = 1;
959 return 0;
960}
961
962static int btmtksdio_get_codec_config_data(struct hci_dev *hdev,
963 __u8 link, struct bt_codec *codec,
964 __u8 *ven_len, __u8 **ven_data)
965{
966 int err = 0;
967
968 if (!ven_data || !ven_len)
969 return -EINVAL;
970
971 *ven_len = 0;
972 *ven_data = NULL;
973
974 if (link != ESCO_LINK) {
975 bt_dev_err(hdev, "Invalid link type(%u)", link);
976 return -EINVAL;
977 }
978
979 *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL);
980 if (!*ven_data) {
981 err = -ENOMEM;
982 goto error;
983 }
984
985 /* supports only CVSD and mSBC offload codecs */
986 switch (codec->id) {
987 case 0x02:
988 **ven_data = 0x00;
989 break;
990 case 0x05:
991 **ven_data = 0x01;
992 break;
993 default:
994 err = -EINVAL;
995 bt_dev_err(hdev, "Invalid codec id(%u)", codec->id);
996 goto error;
997 }
998 /* codec and its capabilities are pre-defined to ids
999 * preset id = 0x00 represents CVSD codec with sampling rate 8K
1000 * preset id = 0x01 represents mSBC codec with sampling rate 16K
1001 */
1002 *ven_len = sizeof(__u8);
1003 return err;
1004
1005error:
1006 kfree(*ven_data);
1007 *ven_data = NULL;
1008 return err;
1009}
1010
1011static int btmtksdio_sco_setting(struct hci_dev *hdev)
1012{
1013 const struct btmtk_sco sco_setting = {
1014 .clock_config = 0x49,
1015 .channel_format_config = 0x80,
1016 };
1017 struct sk_buff *skb;
1018 u32 val;
1019 int err;
1020
1021 /* Enable SCO over I2S/PCM for MediaTek chipset */
1022 skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting),
1023 &sco_setting, HCI_CMD_TIMEOUT);
1024 if (IS_ERR(skb))
1025 return PTR_ERR(skb);
1026
1027 kfree_skb(skb);
1028
1029 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val);
1030 if (err < 0)
1031 return err;
1032
1033 val |= 0x11000000;
1034 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0);
1035 if (err < 0)
1036 return err;
1037
1038 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1039 if (err < 0)
1040 return err;
1041
1042 val |= 0x00000101;
1043 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1044 if (err < 0)
1045 return err;
1046
1047 hdev->get_data_path_id = btmtksdio_get_data_path_id;
1048 hdev->get_codec_config_data = btmtksdio_get_codec_config_data;
1049
1050 return err;
1051}
1052
1053static int btmtksdio_reset_setting(struct hci_dev *hdev)
1054{
1055 int err;
1056 u32 val;
1057
1058 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1059 if (err < 0)
1060 return err;
1061
1062 val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */
1063 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1064 if (err < 0)
1065 return err;
1066
1067 err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val);
1068 if (err < 0)
1069 return err;
1070
1071 val |= MT7921_BTSYS_RST_WITH_GPIO;
1072 return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0);
1073}
1074
1075static int btmtksdio_setup(struct hci_dev *hdev)
1076{
1077 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1078 ktime_t calltime, delta, rettime;
1079 unsigned long long duration;
1080 char fwname[64];
1081 int err, dev_id;
1082 u32 fw_version = 0, val;
1083
1084 calltime = ktime_get();
1085 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
1086
1087 switch (bdev->data->chipid) {
1088 case 0x7921:
1089 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) {
1090 err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS,
1091 &val);
1092 if (err < 0)
1093 return err;
1094
1095 val &= ~BT_DL_STATE;
1096 err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS,
1097 val, ~0);
1098 if (err < 0)
1099 return err;
1100
1101 btmtksdio_fw_pmctrl(bdev);
1102 msleep(20);
1103 btmtksdio_drv_pmctrl(bdev);
1104
1105 clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state);
1106 }
1107
1108 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id);
1109 if (err < 0) {
1110 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1111 return err;
1112 }
1113
1114 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version);
1115 if (err < 0) {
1116 bt_dev_err(hdev, "Failed to get fw version (%d)", err);
1117 return err;
1118 }
1119
1120 snprintf(fwname, sizeof(fwname),
1121 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
1122 dev_id & 0xffff, (fw_version & 0xff) + 1);
1123 err = mt79xx_setup(hdev, fwname);
1124 if (err < 0)
1125 return err;
1126
1127 /* Enable SCO over I2S/PCM */
1128 err = btmtksdio_sco_setting(hdev);
1129 if (err < 0) {
1130 bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err);
1131 return err;
1132 }
1133
1134 /* Enable WBS with mSBC codec */
1135 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
1136
1137 /* Enable GPIO reset mechanism */
1138 if (bdev->reset) {
1139 err = btmtksdio_reset_setting(hdev);
1140 if (err < 0) {
1141 bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err);
1142 devm_gpiod_put(bdev->dev, bdev->reset);
1143 bdev->reset = NULL;
1144 }
1145 }
1146
1147 /* Valid LE States quirk for MediaTek 7921 */
1148 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
1149
1150 break;
1151 case 0x7663:
1152 case 0x7668:
1153 err = mt76xx_setup(hdev, bdev->data->fwname);
1154 if (err < 0)
1155 return err;
1156 break;
1157 default:
1158 return -ENODEV;
1159 }
1160
1161 rettime = ktime_get();
1162 delta = ktime_sub(rettime, calltime);
1163 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1164
1165 pm_runtime_set_autosuspend_delay(bdev->dev,
1166 MTKBTSDIO_AUTOSUSPEND_DELAY);
1167 pm_runtime_use_autosuspend(bdev->dev);
1168
1169 err = pm_runtime_set_active(bdev->dev);
1170 if (err < 0)
1171 return err;
1172
1173 /* Default forbid runtime auto suspend, that can be allowed by
1174 * enable_autosuspend flag or the PM runtime entry under sysfs.
1175 */
1176 pm_runtime_forbid(bdev->dev);
1177 pm_runtime_enable(bdev->dev);
1178
1179 if (enable_autosuspend)
1180 pm_runtime_allow(bdev->dev);
1181
1182 bt_dev_info(hdev, "Device setup in %llu usecs", duration);
1183
1184 return 0;
1185}
1186
1187static int btmtksdio_shutdown(struct hci_dev *hdev)
1188{
1189 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1190 struct btmtk_hci_wmt_params wmt_params;
1191 u8 param = 0x0;
1192 int err;
1193
1194 /* Get back the state to be consistent with the state
1195 * in btmtksdio_setup.
1196 */
1197 pm_runtime_get_sync(bdev->dev);
1198
1199 /* wmt command only works until the reset is complete */
1200 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1201 goto ignore_wmt_cmd;
1202
1203 /* Disable the device */
1204 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1205 wmt_params.flag = 0;
1206 wmt_params.dlen = sizeof(param);
1207 wmt_params.data = ¶m;
1208 wmt_params.status = NULL;
1209
1210 err = mtk_hci_wmt_sync(hdev, &wmt_params);
1211 if (err < 0) {
1212 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1213 return err;
1214 }
1215
1216ignore_wmt_cmd:
1217 pm_runtime_put_noidle(bdev->dev);
1218 pm_runtime_disable(bdev->dev);
1219
1220 return 0;
1221}
1222
1223static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1224{
1225 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1226
1227 switch (hci_skb_pkt_type(skb)) {
1228 case HCI_COMMAND_PKT:
1229 hdev->stat.cmd_tx++;
1230 break;
1231
1232 case HCI_ACLDATA_PKT:
1233 hdev->stat.acl_tx++;
1234 break;
1235
1236 case HCI_SCODATA_PKT:
1237 hdev->stat.sco_tx++;
1238 break;
1239
1240 default:
1241 return -EILSEQ;
1242 }
1243
1244 skb_queue_tail(&bdev->txq, skb);
1245
1246 schedule_work(&bdev->txrx_work);
1247
1248 return 0;
1249}
1250
1251static void btmtksdio_cmd_timeout(struct hci_dev *hdev)
1252{
1253 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1254 u32 status;
1255 int err;
1256
1257 if (!bdev->reset || bdev->data->chipid != 0x7921)
1258 return;
1259
1260 pm_runtime_get_sync(bdev->dev);
1261
1262 if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1263 return;
1264
1265 sdio_claim_host(bdev->func);
1266
1267 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
1268 skb_queue_purge(&bdev->txq);
1269 cancel_work_sync(&bdev->txrx_work);
1270
1271 gpiod_set_value_cansleep(bdev->reset, 1);
1272 msleep(100);
1273 gpiod_set_value_cansleep(bdev->reset, 0);
1274
1275 err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status,
1276 status & BT_RST_DONE, 100000, 2000000);
1277 if (err < 0) {
1278 bt_dev_err(hdev, "Failed to reset (%d)", err);
1279 goto err;
1280 }
1281
1282 clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
1283err:
1284 sdio_release_host(bdev->func);
1285
1286 pm_runtime_put_noidle(bdev->dev);
1287 pm_runtime_disable(bdev->dev);
1288
1289 hci_reset_dev(hdev);
1290}
1291
1292static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
1293{
1294 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1295
1296 return device_may_wakeup(bdev->dev);
1297}
1298
1299static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
1300{
1301 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1302 bool may_wakeup = device_may_wakeup(bdev->dev);
1303 const struct btmtk_wakeon bt_awake = {
1304 .mode = 0x1,
1305 .gpo = 0,
1306 .active_high = 0x1,
1307 .enable_delay = cpu_to_le16(0xc80),
1308 .wakeup_delay = cpu_to_le16(0x20),
1309 };
1310
1311 if (may_wakeup && bdev->data->chipid == 0x7921) {
1312 struct sk_buff *skb;
1313
1314 skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake),
1315 &bt_awake, HCI_CMD_TIMEOUT);
1316 if (IS_ERR(skb))
1317 may_wakeup = false;
1318 else
1319 kfree_skb(skb);
1320 }
1321
1322 return may_wakeup;
1323}
1324
1325static int btmtksdio_probe(struct sdio_func *func,
1326 const struct sdio_device_id *id)
1327{
1328 struct btmtksdio_dev *bdev;
1329 struct hci_dev *hdev;
1330 int err;
1331
1332 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
1333 if (!bdev)
1334 return -ENOMEM;
1335
1336 bdev->data = (void *)id->driver_data;
1337 if (!bdev->data)
1338 return -ENODEV;
1339
1340 bdev->dev = &func->dev;
1341 bdev->func = func;
1342
1343 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work);
1344 skb_queue_head_init(&bdev->txq);
1345
1346 /* Initialize and register HCI device */
1347 hdev = hci_alloc_dev();
1348 if (!hdev) {
1349 dev_err(&func->dev, "Can't allocate HCI device\n");
1350 return -ENOMEM;
1351 }
1352
1353 bdev->hdev = hdev;
1354
1355 hdev->bus = HCI_SDIO;
1356 hci_set_drvdata(hdev, bdev);
1357
1358 hdev->open = btmtksdio_open;
1359 hdev->close = btmtksdio_close;
1360 hdev->cmd_timeout = btmtksdio_cmd_timeout;
1361 hdev->flush = btmtksdio_flush;
1362 hdev->setup = btmtksdio_setup;
1363 hdev->shutdown = btmtksdio_shutdown;
1364 hdev->send = btmtksdio_send_frame;
1365 hdev->wakeup = btmtksdio_sdio_wakeup;
1366 /*
1367 * If SDIO controller supports wake on Bluetooth, sending a wakeon
1368 * command is not necessary.
1369 */
1370 if (device_can_wakeup(func->card->host->parent))
1371 hdev->wakeup = btmtksdio_sdio_inband_wakeup;
1372 else
1373 hdev->wakeup = btmtksdio_sdio_wakeup;
1374 hdev->set_bdaddr = btmtk_set_bdaddr;
1375
1376 SET_HCIDEV_DEV(hdev, &func->dev);
1377
1378 hdev->manufacturer = 70;
1379 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
1380
1381 sdio_set_drvdata(func, bdev);
1382
1383 err = hci_register_dev(hdev);
1384 if (err < 0) {
1385 dev_err(&func->dev, "Can't register HCI device\n");
1386 hci_free_dev(hdev);
1387 return err;
1388 }
1389
1390 /* pm_runtime_enable would be done after the firmware is being
1391 * downloaded because the core layer probably already enables
1392 * runtime PM for this func such as the case host->caps &
1393 * MMC_CAP_POWER_OFF_CARD.
1394 */
1395 if (pm_runtime_enabled(bdev->dev))
1396 pm_runtime_disable(bdev->dev);
1397
1398 /* As explaination in drivers/mmc/core/sdio_bus.c tells us:
1399 * Unbound SDIO functions are always suspended.
1400 * During probe, the function is set active and the usage count
1401 * is incremented. If the driver supports runtime PM,
1402 * it should call pm_runtime_put_noidle() in its probe routine and
1403 * pm_runtime_get_noresume() in its remove routine.
1404 *
1405 * So, put a pm_runtime_put_noidle here !
1406 */
1407 pm_runtime_put_noidle(bdev->dev);
1408
1409 err = device_init_wakeup(bdev->dev, true);
1410 if (err)
1411 bt_dev_err(hdev, "failed to initialize device wakeup");
1412
1413 bdev->dev->of_node = of_find_compatible_node(NULL, NULL,
1414 "mediatek,mt7921s-bluetooth");
1415 bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset",
1416 GPIOD_OUT_LOW);
1417 if (IS_ERR(bdev->reset))
1418 err = PTR_ERR(bdev->reset);
1419
1420 return err;
1421}
1422
1423static void btmtksdio_remove(struct sdio_func *func)
1424{
1425 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
1426 struct hci_dev *hdev;
1427
1428 if (!bdev)
1429 return;
1430
1431 /* Be consistent the state in btmtksdio_probe */
1432 pm_runtime_get_noresume(bdev->dev);
1433
1434 hdev = bdev->hdev;
1435
1436 sdio_set_drvdata(func, NULL);
1437 hci_unregister_dev(hdev);
1438 hci_free_dev(hdev);
1439}
1440
1441#ifdef CONFIG_PM
1442static int btmtksdio_runtime_suspend(struct device *dev)
1443{
1444 struct sdio_func *func = dev_to_sdio_func(dev);
1445 struct btmtksdio_dev *bdev;
1446 int err;
1447
1448 bdev = sdio_get_drvdata(func);
1449 if (!bdev)
1450 return 0;
1451
1452 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1453 return 0;
1454
1455 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1456
1457 err = btmtksdio_fw_pmctrl(bdev);
1458
1459 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err);
1460
1461 return err;
1462}
1463
1464static int btmtksdio_system_suspend(struct device *dev)
1465{
1466 struct sdio_func *func = dev_to_sdio_func(dev);
1467 struct btmtksdio_dev *bdev;
1468
1469 bdev = sdio_get_drvdata(func);
1470 if (!bdev)
1471 return 0;
1472
1473 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1474 return 0;
1475
1476 set_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
1477
1478 return btmtksdio_runtime_suspend(dev);
1479}
1480
1481static int btmtksdio_runtime_resume(struct device *dev)
1482{
1483 struct sdio_func *func = dev_to_sdio_func(dev);
1484 struct btmtksdio_dev *bdev;
1485 int err;
1486
1487 bdev = sdio_get_drvdata(func);
1488 if (!bdev)
1489 return 0;
1490
1491 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1492 return 0;
1493
1494 err = btmtksdio_drv_pmctrl(bdev);
1495
1496 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err);
1497
1498 return err;
1499}
1500
1501static int btmtksdio_system_resume(struct device *dev)
1502{
1503 return btmtksdio_runtime_resume(dev);
1504}
1505
1506static const struct dev_pm_ops btmtksdio_pm_ops = {
1507 SYSTEM_SLEEP_PM_OPS(btmtksdio_system_suspend, btmtksdio_system_resume)
1508 RUNTIME_PM_OPS(btmtksdio_runtime_suspend, btmtksdio_runtime_resume, NULL)
1509};
1510
1511#define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
1512#else /* CONFIG_PM */
1513#define BTMTKSDIO_PM_OPS NULL
1514#endif /* CONFIG_PM */
1515
1516static struct sdio_driver btmtksdio_driver = {
1517 .name = "btmtksdio",
1518 .probe = btmtksdio_probe,
1519 .remove = btmtksdio_remove,
1520 .id_table = btmtksdio_table,
1521 .drv = {
1522 .owner = THIS_MODULE,
1523 .pm = BTMTKSDIO_PM_OPS,
1524 }
1525};
1526
1527module_sdio_driver(btmtksdio_driver);
1528
1529module_param(enable_autosuspend, bool, 0644);
1530MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
1531
1532MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1533MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
1534MODULE_VERSION(VERSION);
1535MODULE_LICENSE("GPL");
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 <asm/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
24#include <linux/mmc/host.h>
25#include <linux/mmc/sdio_ids.h>
26#include <linux/mmc/sdio_func.h>
27
28#include <net/bluetooth/bluetooth.h>
29#include <net/bluetooth/hci_core.h>
30
31#include "h4_recv.h"
32#include "btmtk.h"
33
34#define VERSION "0.1"
35
36#define MTKBTSDIO_AUTOSUSPEND_DELAY 1000
37
38static bool enable_autosuspend = true;
39
40struct btmtksdio_data {
41 const char *fwname;
42 u16 chipid;
43 bool lp_mbox_supported;
44};
45
46static const struct btmtksdio_data mt7663_data = {
47 .fwname = FIRMWARE_MT7663,
48 .chipid = 0x7663,
49 .lp_mbox_supported = false,
50};
51
52static const struct btmtksdio_data mt7668_data = {
53 .fwname = FIRMWARE_MT7668,
54 .chipid = 0x7668,
55 .lp_mbox_supported = false,
56};
57
58static const struct btmtksdio_data mt7921_data = {
59 .fwname = FIRMWARE_MT7961,
60 .chipid = 0x7921,
61 .lp_mbox_supported = true,
62};
63
64static const struct sdio_device_id btmtksdio_table[] = {
65 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663),
66 .driver_data = (kernel_ulong_t)&mt7663_data },
67 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668),
68 .driver_data = (kernel_ulong_t)&mt7668_data },
69 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7961),
70 .driver_data = (kernel_ulong_t)&mt7921_data },
71 { } /* Terminating entry */
72};
73MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
74
75#define MTK_REG_CHLPCR 0x4 /* W1S */
76#define C_INT_EN_SET BIT(0)
77#define C_INT_EN_CLR BIT(1)
78#define C_FW_OWN_REQ_SET BIT(8) /* For write */
79#define C_COM_DRV_OWN BIT(8) /* For read */
80#define C_FW_OWN_REQ_CLR BIT(9)
81
82#define MTK_REG_CSDIOCSR 0x8
83#define SDIO_RE_INIT_EN BIT(0)
84#define SDIO_INT_CTL BIT(2)
85
86#define MTK_REG_CHCR 0xc
87#define C_INT_CLR_CTRL BIT(1)
88#define BT_RST_DONE BIT(8)
89
90/* CHISR have the same bits field definition with CHIER */
91#define MTK_REG_CHISR 0x10
92#define MTK_REG_CHIER 0x14
93#define FW_OWN_BACK_INT BIT(0)
94#define RX_DONE_INT BIT(1)
95#define TX_EMPTY BIT(2)
96#define TX_FIFO_OVERFLOW BIT(8)
97#define FW_MAILBOX_INT BIT(15)
98#define INT_MASK GENMASK(15, 0)
99#define RX_PKT_LEN GENMASK(31, 16)
100
101#define MTK_REG_CSICR 0xc0
102#define CSICR_CLR_MBOX_ACK BIT(0)
103#define MTK_REG_PH2DSM0R 0xc4
104#define PH2DSM0R_DRIVER_OWN BIT(0)
105#define MTK_REG_PD2HRM0R 0xdc
106#define PD2HRM0R_DRV_OWN BIT(0)
107
108#define MTK_REG_CTDR 0x18
109
110#define MTK_REG_CRDR 0x1c
111
112#define MTK_REG_CRPLR 0x24
113
114#define MTK_SDIO_BLOCK_SIZE 256
115
116#define BTMTKSDIO_TX_WAIT_VND_EVT 1
117#define BTMTKSDIO_HW_TX_READY 2
118#define BTMTKSDIO_FUNC_ENABLED 3
119#define BTMTKSDIO_PATCH_ENABLED 4
120#define BTMTKSDIO_HW_RESET_ACTIVE 5
121
122struct mtkbtsdio_hdr {
123 __le16 len;
124 __le16 reserved;
125 u8 bt_type;
126} __packed;
127
128struct btmtksdio_dev {
129 struct hci_dev *hdev;
130 struct sdio_func *func;
131 struct device *dev;
132
133 struct work_struct txrx_work;
134 unsigned long tx_state;
135 struct sk_buff_head txq;
136
137 struct sk_buff *evt_skb;
138
139 const struct btmtksdio_data *data;
140
141 struct gpio_desc *reset;
142};
143
144static int mtk_hci_wmt_sync(struct hci_dev *hdev,
145 struct btmtk_hci_wmt_params *wmt_params)
146{
147 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
148 struct btmtk_hci_wmt_evt_funcc *wmt_evt_funcc;
149 struct btmtk_hci_wmt_evt_reg *wmt_evt_reg;
150 u32 hlen, status = BTMTK_WMT_INVALID;
151 struct btmtk_hci_wmt_evt *wmt_evt;
152 struct btmtk_hci_wmt_cmd *wc;
153 struct btmtk_wmt_hdr *hdr;
154 int err;
155
156 /* Send the WMT command and wait until the WMT event returns */
157 hlen = sizeof(*hdr) + wmt_params->dlen;
158 if (hlen > 255)
159 return -EINVAL;
160
161 wc = kzalloc(hlen, GFP_KERNEL);
162 if (!wc)
163 return -ENOMEM;
164
165 hdr = &wc->hdr;
166 hdr->dir = 1;
167 hdr->op = wmt_params->op;
168 hdr->dlen = cpu_to_le16(wmt_params->dlen + 1);
169 hdr->flag = wmt_params->flag;
170 memcpy(wc->data, wmt_params->data, wmt_params->dlen);
171
172 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
173
174 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
175 if (err < 0) {
176 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
177 goto err_free_wc;
178 }
179
180 /* The vendor specific WMT commands are all answered by a vendor
181 * specific event and will not have the Command Status or Command
182 * Complete as with usual HCI command flow control.
183 *
184 * After sending the command, wait for BTMTKSDIO_TX_WAIT_VND_EVT
185 * state to be cleared. The driver specific event receive routine
186 * will clear that state and with that indicate completion of the
187 * WMT command.
188 */
189 err = wait_on_bit_timeout(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT,
190 TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT);
191 if (err == -EINTR) {
192 bt_dev_err(hdev, "Execution of wmt command interrupted");
193 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
194 goto err_free_wc;
195 }
196
197 if (err) {
198 bt_dev_err(hdev, "Execution of wmt command timed out");
199 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
200 err = -ETIMEDOUT;
201 goto err_free_wc;
202 }
203
204 /* Parse and handle the return WMT event */
205 wmt_evt = (struct btmtk_hci_wmt_evt *)bdev->evt_skb->data;
206 if (wmt_evt->whdr.op != hdr->op) {
207 bt_dev_err(hdev, "Wrong op received %d expected %d",
208 wmt_evt->whdr.op, hdr->op);
209 err = -EIO;
210 goto err_free_skb;
211 }
212
213 switch (wmt_evt->whdr.op) {
214 case BTMTK_WMT_SEMAPHORE:
215 if (wmt_evt->whdr.flag == 2)
216 status = BTMTK_WMT_PATCH_UNDONE;
217 else
218 status = BTMTK_WMT_PATCH_DONE;
219 break;
220 case BTMTK_WMT_FUNC_CTRL:
221 wmt_evt_funcc = (struct btmtk_hci_wmt_evt_funcc *)wmt_evt;
222 if (be16_to_cpu(wmt_evt_funcc->status) == 0x404)
223 status = BTMTK_WMT_ON_DONE;
224 else if (be16_to_cpu(wmt_evt_funcc->status) == 0x420)
225 status = BTMTK_WMT_ON_PROGRESS;
226 else
227 status = BTMTK_WMT_ON_UNDONE;
228 break;
229 case BTMTK_WMT_PATCH_DWNLD:
230 if (wmt_evt->whdr.flag == 2)
231 status = BTMTK_WMT_PATCH_DONE;
232 else if (wmt_evt->whdr.flag == 1)
233 status = BTMTK_WMT_PATCH_PROGRESS;
234 else
235 status = BTMTK_WMT_PATCH_UNDONE;
236 break;
237 case BTMTK_WMT_REGISTER:
238 wmt_evt_reg = (struct btmtk_hci_wmt_evt_reg *)wmt_evt;
239 if (le16_to_cpu(wmt_evt->whdr.dlen) == 12)
240 status = le32_to_cpu(wmt_evt_reg->val);
241 break;
242 }
243
244 if (wmt_params->status)
245 *wmt_params->status = status;
246
247err_free_skb:
248 kfree_skb(bdev->evt_skb);
249 bdev->evt_skb = NULL;
250err_free_wc:
251 kfree(wc);
252
253 return err;
254}
255
256static int btmtksdio_tx_packet(struct btmtksdio_dev *bdev,
257 struct sk_buff *skb)
258{
259 struct mtkbtsdio_hdr *sdio_hdr;
260 int err;
261
262 /* Make sure that there are enough rooms for SDIO header */
263 if (unlikely(skb_headroom(skb) < sizeof(*sdio_hdr))) {
264 err = pskb_expand_head(skb, sizeof(*sdio_hdr), 0,
265 GFP_ATOMIC);
266 if (err < 0)
267 return err;
268 }
269
270 /* Prepend MediaTek SDIO Specific Header */
271 skb_push(skb, sizeof(*sdio_hdr));
272
273 sdio_hdr = (void *)skb->data;
274 sdio_hdr->len = cpu_to_le16(skb->len);
275 sdio_hdr->reserved = cpu_to_le16(0);
276 sdio_hdr->bt_type = hci_skb_pkt_type(skb);
277
278 clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
279 err = sdio_writesb(bdev->func, MTK_REG_CTDR, skb->data,
280 round_up(skb->len, MTK_SDIO_BLOCK_SIZE));
281 if (err < 0)
282 goto err_skb_pull;
283
284 bdev->hdev->stat.byte_tx += skb->len;
285
286 kfree_skb(skb);
287
288 return 0;
289
290err_skb_pull:
291 skb_pull(skb, sizeof(*sdio_hdr));
292
293 return err;
294}
295
296static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
297{
298 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
299}
300
301static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev)
302{
303 return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL);
304}
305
306static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev)
307{
308 return sdio_readl(bdev->func, MTK_REG_CHCR, NULL);
309}
310
311static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev)
312{
313 u32 status;
314 int err;
315
316 sdio_claim_host(bdev->func);
317
318 if (bdev->data->lp_mbox_supported &&
319 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state)) {
320 sdio_writel(bdev->func, CSICR_CLR_MBOX_ACK, MTK_REG_CSICR,
321 &err);
322 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
323 status, !(status & PD2HRM0R_DRV_OWN),
324 2000, 1000000);
325 if (err < 0) {
326 bt_dev_err(bdev->hdev, "mailbox ACK not cleared");
327 goto out;
328 }
329 }
330
331 /* Return ownership to the device */
332 sdio_writel(bdev->func, C_FW_OWN_REQ_SET, MTK_REG_CHLPCR, &err);
333 if (err < 0)
334 goto out;
335
336 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
337 !(status & C_COM_DRV_OWN), 2000, 1000000);
338
339out:
340 sdio_release_host(bdev->func);
341
342 if (err < 0)
343 bt_dev_err(bdev->hdev, "Cannot return ownership to device");
344
345 return err;
346}
347
348static int btmtksdio_drv_pmctrl(struct btmtksdio_dev *bdev)
349{
350 u32 status;
351 int err;
352
353 sdio_claim_host(bdev->func);
354
355 /* Get ownership from the device */
356 sdio_writel(bdev->func, C_FW_OWN_REQ_CLR, MTK_REG_CHLPCR, &err);
357 if (err < 0)
358 goto out;
359
360 err = readx_poll_timeout(btmtksdio_drv_own_query, bdev, status,
361 status & C_COM_DRV_OWN, 2000, 1000000);
362
363 if (!err && bdev->data->lp_mbox_supported &&
364 test_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state))
365 err = readx_poll_timeout(btmtksdio_drv_own_query_79xx, bdev,
366 status, status & PD2HRM0R_DRV_OWN,
367 2000, 1000000);
368
369out:
370 sdio_release_host(bdev->func);
371
372 if (err < 0)
373 bt_dev_err(bdev->hdev, "Cannot get ownership from device");
374
375 return err;
376}
377
378static int btmtksdio_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
379{
380 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
381 struct hci_event_hdr *hdr = (void *)skb->data;
382 u8 evt = hdr->evt;
383 int err;
384
385 /* When someone waits for the WMT event, the skb is being cloned
386 * and being processed the events from there then.
387 */
388 if (test_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state)) {
389 bdev->evt_skb = skb_clone(skb, GFP_KERNEL);
390 if (!bdev->evt_skb) {
391 err = -ENOMEM;
392 goto err_out;
393 }
394 }
395
396 err = hci_recv_frame(hdev, skb);
397 if (err < 0)
398 goto err_free_skb;
399
400 if (evt == HCI_EV_WMT) {
401 if (test_and_clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT,
402 &bdev->tx_state)) {
403 /* Barrier to sync with other CPUs */
404 smp_mb__after_atomic();
405 wake_up_bit(&bdev->tx_state, BTMTKSDIO_TX_WAIT_VND_EVT);
406 }
407 }
408
409 return 0;
410
411err_free_skb:
412 kfree_skb(bdev->evt_skb);
413 bdev->evt_skb = NULL;
414
415err_out:
416 return err;
417}
418
419static int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb)
420{
421 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
422 u16 handle = le16_to_cpu(hci_acl_hdr(skb)->handle);
423
424 switch (handle) {
425 case 0xfc6f:
426 /* Firmware dump from device: when the firmware hangs, the
427 * device can no longer suspend and thus disable auto-suspend.
428 */
429 pm_runtime_forbid(bdev->dev);
430 fallthrough;
431 case 0x05ff:
432 case 0x05fe:
433 /* Firmware debug logging */
434 return hci_recv_diag(hdev, skb);
435 }
436
437 return hci_recv_frame(hdev, skb);
438}
439
440static const struct h4_recv_pkt mtk_recv_pkts[] = {
441 { H4_RECV_ACL, .recv = btmtksdio_recv_acl },
442 { H4_RECV_SCO, .recv = hci_recv_frame },
443 { H4_RECV_EVENT, .recv = btmtksdio_recv_event },
444};
445
446static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size)
447{
448 const struct h4_recv_pkt *pkts = mtk_recv_pkts;
449 int pkts_count = ARRAY_SIZE(mtk_recv_pkts);
450 struct mtkbtsdio_hdr *sdio_hdr;
451 int err, i, pad_size;
452 struct sk_buff *skb;
453 u16 dlen;
454
455 if (rx_size < sizeof(*sdio_hdr))
456 return -EILSEQ;
457
458 /* A SDIO packet is exactly containing a Bluetooth packet */
459 skb = bt_skb_alloc(rx_size, GFP_KERNEL);
460 if (!skb)
461 return -ENOMEM;
462
463 skb_put(skb, rx_size);
464
465 err = sdio_readsb(bdev->func, skb->data, MTK_REG_CRDR, rx_size);
466 if (err < 0)
467 goto err_kfree_skb;
468
469 sdio_hdr = (void *)skb->data;
470
471 /* We assume the default error as -EILSEQ simply to make the error path
472 * be cleaner.
473 */
474 err = -EILSEQ;
475
476 if (rx_size != le16_to_cpu(sdio_hdr->len)) {
477 bt_dev_err(bdev->hdev, "Rx size in sdio header is mismatched ");
478 goto err_kfree_skb;
479 }
480
481 hci_skb_pkt_type(skb) = sdio_hdr->bt_type;
482
483 /* Remove MediaTek SDIO header */
484 skb_pull(skb, sizeof(*sdio_hdr));
485
486 /* We have to dig into the packet to get payload size and then know how
487 * many padding bytes at the tail, these padding bytes should be removed
488 * before the packet is indicated to the core layer.
489 */
490 for (i = 0; i < pkts_count; i++) {
491 if (sdio_hdr->bt_type == (&pkts[i])->type)
492 break;
493 }
494
495 if (i >= pkts_count) {
496 bt_dev_err(bdev->hdev, "Invalid bt type 0x%02x",
497 sdio_hdr->bt_type);
498 goto err_kfree_skb;
499 }
500
501 /* Remaining bytes cannot hold a header*/
502 if (skb->len < (&pkts[i])->hlen) {
503 bt_dev_err(bdev->hdev, "The size of bt header is mismatched");
504 goto err_kfree_skb;
505 }
506
507 switch ((&pkts[i])->lsize) {
508 case 1:
509 dlen = skb->data[(&pkts[i])->loff];
510 break;
511 case 2:
512 dlen = get_unaligned_le16(skb->data +
513 (&pkts[i])->loff);
514 break;
515 default:
516 goto err_kfree_skb;
517 }
518
519 pad_size = skb->len - (&pkts[i])->hlen - dlen;
520
521 /* Remaining bytes cannot hold a payload */
522 if (pad_size < 0) {
523 bt_dev_err(bdev->hdev, "The size of bt payload is mismatched");
524 goto err_kfree_skb;
525 }
526
527 /* Remove padding bytes */
528 skb_trim(skb, skb->len - pad_size);
529
530 /* Complete frame */
531 (&pkts[i])->recv(bdev->hdev, skb);
532
533 bdev->hdev->stat.byte_rx += rx_size;
534
535 return 0;
536
537err_kfree_skb:
538 kfree_skb(skb);
539
540 return err;
541}
542
543static void btmtksdio_txrx_work(struct work_struct *work)
544{
545 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
546 txrx_work);
547 unsigned long txrx_timeout;
548 u32 int_status, rx_size;
549 struct sk_buff *skb;
550 int err;
551
552 pm_runtime_get_sync(bdev->dev);
553
554 sdio_claim_host(bdev->func);
555
556 /* Disable interrupt */
557 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
558
559 txrx_timeout = jiffies + 5 * HZ;
560
561 do {
562 int_status = sdio_readl(bdev->func, MTK_REG_CHISR, NULL);
563
564 /* Ack an interrupt as soon as possible before any operation on
565 * hardware.
566 *
567 * Note that we don't ack any status during operations to avoid race
568 * condition between the host and the device such as it's possible to
569 * mistakenly ack RX_DONE for the next packet and then cause interrupts
570 * not be raised again but there is still pending data in the hardware
571 * FIFO.
572 */
573 sdio_writel(bdev->func, int_status, MTK_REG_CHISR, NULL);
574 int_status &= INT_MASK;
575
576 if ((int_status & FW_MAILBOX_INT) &&
577 bdev->data->chipid == 0x7921) {
578 sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN,
579 MTK_REG_PH2DSM0R, 0);
580 }
581
582 if (int_status & FW_OWN_BACK_INT)
583 bt_dev_dbg(bdev->hdev, "Get fw own back");
584
585 if (int_status & TX_EMPTY)
586 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
587
588 else if (unlikely(int_status & TX_FIFO_OVERFLOW))
589 bt_dev_warn(bdev->hdev, "Tx fifo overflow");
590
591 if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) {
592 skb = skb_dequeue(&bdev->txq);
593 if (skb) {
594 err = btmtksdio_tx_packet(bdev, skb);
595 if (err < 0) {
596 bdev->hdev->stat.err_tx++;
597 skb_queue_head(&bdev->txq, skb);
598 }
599 }
600 }
601
602 if (int_status & RX_DONE_INT) {
603 rx_size = sdio_readl(bdev->func, MTK_REG_CRPLR, NULL);
604 rx_size = (rx_size & RX_PKT_LEN) >> 16;
605 if (btmtksdio_rx_packet(bdev, rx_size) < 0)
606 bdev->hdev->stat.err_rx++;
607 }
608 } while (int_status || time_is_before_jiffies(txrx_timeout));
609
610 /* Enable interrupt */
611 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, 0);
612
613 sdio_release_host(bdev->func);
614
615 pm_runtime_mark_last_busy(bdev->dev);
616 pm_runtime_put_autosuspend(bdev->dev);
617}
618
619static void btmtksdio_interrupt(struct sdio_func *func)
620{
621 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
622
623 /* Disable interrupt */
624 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, 0);
625
626 schedule_work(&bdev->txrx_work);
627}
628
629static int btmtksdio_open(struct hci_dev *hdev)
630{
631 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
632 u32 val;
633 int err;
634
635 sdio_claim_host(bdev->func);
636
637 err = sdio_enable_func(bdev->func);
638 if (err < 0)
639 goto err_release_host;
640
641 set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
642
643 err = btmtksdio_drv_pmctrl(bdev);
644 if (err < 0)
645 goto err_disable_func;
646
647 /* Disable interrupt & mask out all interrupt sources */
648 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, &err);
649 if (err < 0)
650 goto err_disable_func;
651
652 sdio_writel(bdev->func, 0, MTK_REG_CHIER, &err);
653 if (err < 0)
654 goto err_disable_func;
655
656 err = sdio_claim_irq(bdev->func, btmtksdio_interrupt);
657 if (err < 0)
658 goto err_disable_func;
659
660 err = sdio_set_block_size(bdev->func, MTK_SDIO_BLOCK_SIZE);
661 if (err < 0)
662 goto err_release_irq;
663
664 /* SDIO CMD 5 allows the SDIO device back to idle state an
665 * synchronous interrupt is supported in SDIO 4-bit mode
666 */
667 val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err);
668 if (err < 0)
669 goto err_release_irq;
670
671 val |= SDIO_INT_CTL;
672 sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err);
673 if (err < 0)
674 goto err_release_irq;
675
676 /* Explitly set write-1-clear method */
677 val = sdio_readl(bdev->func, MTK_REG_CHCR, &err);
678 if (err < 0)
679 goto err_release_irq;
680
681 val |= C_INT_CLR_CTRL;
682 sdio_writel(bdev->func, val, MTK_REG_CHCR, &err);
683 if (err < 0)
684 goto err_release_irq;
685
686 /* Setup interrupt sources */
687 sdio_writel(bdev->func, RX_DONE_INT | TX_EMPTY | TX_FIFO_OVERFLOW,
688 MTK_REG_CHIER, &err);
689 if (err < 0)
690 goto err_release_irq;
691
692 /* Enable interrupt */
693 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, &err);
694 if (err < 0)
695 goto err_release_irq;
696
697 sdio_release_host(bdev->func);
698
699 return 0;
700
701err_release_irq:
702 sdio_release_irq(bdev->func);
703
704err_disable_func:
705 sdio_disable_func(bdev->func);
706
707err_release_host:
708 sdio_release_host(bdev->func);
709
710 return err;
711}
712
713static int btmtksdio_close(struct hci_dev *hdev)
714{
715 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
716
717 sdio_claim_host(bdev->func);
718
719 /* Disable interrupt */
720 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
721
722 sdio_release_irq(bdev->func);
723
724 cancel_work_sync(&bdev->txrx_work);
725
726 btmtksdio_fw_pmctrl(bdev);
727
728 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
729 sdio_disable_func(bdev->func);
730
731 sdio_release_host(bdev->func);
732
733 return 0;
734}
735
736static int btmtksdio_flush(struct hci_dev *hdev)
737{
738 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
739
740 skb_queue_purge(&bdev->txq);
741
742 cancel_work_sync(&bdev->txrx_work);
743
744 return 0;
745}
746
747static int btmtksdio_func_query(struct hci_dev *hdev)
748{
749 struct btmtk_hci_wmt_params wmt_params;
750 int status, err;
751 u8 param = 0;
752
753 /* Query whether the function is enabled */
754 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
755 wmt_params.flag = 4;
756 wmt_params.dlen = sizeof(param);
757 wmt_params.data = ¶m;
758 wmt_params.status = &status;
759
760 err = mtk_hci_wmt_sync(hdev, &wmt_params);
761 if (err < 0) {
762 bt_dev_err(hdev, "Failed to query function status (%d)", err);
763 return err;
764 }
765
766 return status;
767}
768
769static int mt76xx_setup(struct hci_dev *hdev, const char *fwname)
770{
771 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
772 struct btmtk_hci_wmt_params wmt_params;
773 struct btmtk_tci_sleep tci_sleep;
774 struct sk_buff *skb;
775 int err, status;
776 u8 param = 0x1;
777
778 /* Query whether the firmware is already download */
779 wmt_params.op = BTMTK_WMT_SEMAPHORE;
780 wmt_params.flag = 1;
781 wmt_params.dlen = 0;
782 wmt_params.data = NULL;
783 wmt_params.status = &status;
784
785 err = mtk_hci_wmt_sync(hdev, &wmt_params);
786 if (err < 0) {
787 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
788 return err;
789 }
790
791 if (status == BTMTK_WMT_PATCH_DONE) {
792 bt_dev_info(hdev, "Firmware already downloaded");
793 goto ignore_setup_fw;
794 }
795
796 /* Setup a firmware which the device definitely requires */
797 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync);
798 if (err < 0)
799 return err;
800
801ignore_setup_fw:
802 /* Query whether the device is already enabled */
803 err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
804 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
805 2000, 5000000);
806 /* -ETIMEDOUT happens */
807 if (err < 0)
808 return err;
809
810 /* The other errors happen in btusb_mtk_func_query */
811 if (status < 0)
812 return status;
813
814 if (status == BTMTK_WMT_ON_DONE) {
815 bt_dev_info(hdev, "function already on");
816 goto ignore_func_on;
817 }
818
819 /* Enable Bluetooth protocol */
820 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
821 wmt_params.flag = 0;
822 wmt_params.dlen = sizeof(param);
823 wmt_params.data = ¶m;
824 wmt_params.status = NULL;
825
826 err = mtk_hci_wmt_sync(hdev, &wmt_params);
827 if (err < 0) {
828 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
829 return err;
830 }
831
832 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
833
834ignore_func_on:
835 /* Apply the low power environment setup */
836 tci_sleep.mode = 0x5;
837 tci_sleep.duration = cpu_to_le16(0x640);
838 tci_sleep.host_duration = cpu_to_le16(0x640);
839 tci_sleep.host_wakeup_pin = 0;
840 tci_sleep.time_compensation = 0;
841
842 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
843 HCI_INIT_TIMEOUT);
844 if (IS_ERR(skb)) {
845 err = PTR_ERR(skb);
846 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
847 return err;
848 }
849 kfree_skb(skb);
850
851 return 0;
852}
853
854static int mt79xx_setup(struct hci_dev *hdev, const char *fwname)
855{
856 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
857 struct btmtk_hci_wmt_params wmt_params;
858 u8 param = 0x1;
859 int err;
860
861 err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync);
862 if (err < 0) {
863 bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err);
864 return err;
865 }
866
867 err = btmtksdio_fw_pmctrl(bdev);
868 if (err < 0)
869 return err;
870
871 err = btmtksdio_drv_pmctrl(bdev);
872 if (err < 0)
873 return err;
874
875 /* Enable Bluetooth protocol */
876 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
877 wmt_params.flag = 0;
878 wmt_params.dlen = sizeof(param);
879 wmt_params.data = ¶m;
880 wmt_params.status = NULL;
881
882 err = mtk_hci_wmt_sync(hdev, &wmt_params);
883 if (err < 0) {
884 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
885 return err;
886 }
887
888 hci_set_msft_opcode(hdev, 0xFD30);
889 hci_set_aosp_capable(hdev);
890 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
891
892 return err;
893}
894
895static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
896{
897 struct btmtk_hci_wmt_params wmt_params;
898 struct reg_read_cmd reg_read = {
899 .type = 1,
900 .num = 1,
901 };
902 u32 status;
903 int err;
904
905 reg_read.addr = cpu_to_le32(reg);
906 wmt_params.op = BTMTK_WMT_REGISTER;
907 wmt_params.flag = BTMTK_WMT_REG_READ;
908 wmt_params.dlen = sizeof(reg_read);
909 wmt_params.data = ®_read;
910 wmt_params.status = &status;
911
912 err = mtk_hci_wmt_sync(hdev, &wmt_params);
913 if (err < 0) {
914 bt_dev_err(hdev, "Failed to read reg (%d)", err);
915 return err;
916 }
917
918 *val = status;
919
920 return err;
921}
922
923static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask)
924{
925 struct btmtk_hci_wmt_params wmt_params;
926 const struct reg_write_cmd reg_write = {
927 .type = 1,
928 .num = 1,
929 .addr = cpu_to_le32(reg),
930 .data = cpu_to_le32(val),
931 .mask = cpu_to_le32(mask),
932 };
933 int err, status;
934
935 wmt_params.op = BTMTK_WMT_REGISTER;
936 wmt_params.flag = BTMTK_WMT_REG_WRITE;
937 wmt_params.dlen = sizeof(reg_write);
938 wmt_params.data = ®_write;
939 wmt_params.status = &status;
940
941 err = mtk_hci_wmt_sync(hdev, &wmt_params);
942 if (err < 0)
943 bt_dev_err(hdev, "Failed to write reg (%d)", err);
944
945 return err;
946}
947
948static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
949{
950 /* uses 1 as data path id for all the usecases */
951 *data_path_id = 1;
952 return 0;
953}
954
955static int btmtksdio_get_codec_config_data(struct hci_dev *hdev,
956 __u8 link, struct bt_codec *codec,
957 __u8 *ven_len, __u8 **ven_data)
958{
959 int err = 0;
960
961 if (!ven_data || !ven_len)
962 return -EINVAL;
963
964 *ven_len = 0;
965 *ven_data = NULL;
966
967 if (link != ESCO_LINK) {
968 bt_dev_err(hdev, "Invalid link type(%u)", link);
969 return -EINVAL;
970 }
971
972 *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL);
973 if (!*ven_data) {
974 err = -ENOMEM;
975 goto error;
976 }
977
978 /* supports only CVSD and mSBC offload codecs */
979 switch (codec->id) {
980 case 0x02:
981 **ven_data = 0x00;
982 break;
983 case 0x05:
984 **ven_data = 0x01;
985 break;
986 default:
987 err = -EINVAL;
988 bt_dev_err(hdev, "Invalid codec id(%u)", codec->id);
989 goto error;
990 }
991 /* codec and its capabilities are pre-defined to ids
992 * preset id = 0x00 represents CVSD codec with sampling rate 8K
993 * preset id = 0x01 represents mSBC codec with sampling rate 16K
994 */
995 *ven_len = sizeof(__u8);
996 return err;
997
998error:
999 kfree(*ven_data);
1000 *ven_data = NULL;
1001 return err;
1002}
1003
1004static int btmtksdio_sco_setting(struct hci_dev *hdev)
1005{
1006 const struct btmtk_sco sco_setting = {
1007 .clock_config = 0x49,
1008 .channel_format_config = 0x80,
1009 };
1010 struct sk_buff *skb;
1011 u32 val;
1012 int err;
1013
1014 /* Enable SCO over I2S/PCM for MediaTek chipset */
1015 skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting),
1016 &sco_setting, HCI_CMD_TIMEOUT);
1017 if (IS_ERR(skb))
1018 return PTR_ERR(skb);
1019
1020 kfree_skb(skb);
1021
1022 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val);
1023 if (err < 0)
1024 return err;
1025
1026 val |= 0x11000000;
1027 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0);
1028 if (err < 0)
1029 return err;
1030
1031 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1032 if (err < 0)
1033 return err;
1034
1035 val |= 0x00000101;
1036 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1037 if (err < 0)
1038 return err;
1039
1040 hdev->get_data_path_id = btmtksdio_get_data_path_id;
1041 hdev->get_codec_config_data = btmtksdio_get_codec_config_data;
1042
1043 return err;
1044}
1045
1046static int btmtksdio_reset_setting(struct hci_dev *hdev)
1047{
1048 int err;
1049 u32 val;
1050
1051 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1052 if (err < 0)
1053 return err;
1054
1055 val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */
1056 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1057 if (err < 0)
1058 return err;
1059
1060 err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val);
1061 if (err < 0)
1062 return err;
1063
1064 val |= MT7921_BTSYS_RST_WITH_GPIO;
1065 return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0);
1066}
1067
1068static int btmtksdio_setup(struct hci_dev *hdev)
1069{
1070 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1071 ktime_t calltime, delta, rettime;
1072 unsigned long long duration;
1073 char fwname[64];
1074 int err, dev_id;
1075 u32 fw_version = 0, val;
1076
1077 calltime = ktime_get();
1078 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
1079
1080 switch (bdev->data->chipid) {
1081 case 0x7921:
1082 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) {
1083 err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS,
1084 &val);
1085 if (err < 0)
1086 return err;
1087
1088 val &= ~BT_DL_STATE;
1089 err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS,
1090 val, ~0);
1091 if (err < 0)
1092 return err;
1093
1094 btmtksdio_fw_pmctrl(bdev);
1095 msleep(20);
1096 btmtksdio_drv_pmctrl(bdev);
1097
1098 clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state);
1099 }
1100
1101 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id);
1102 if (err < 0) {
1103 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1104 return err;
1105 }
1106
1107 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version);
1108 if (err < 0) {
1109 bt_dev_err(hdev, "Failed to get fw version (%d)", err);
1110 return err;
1111 }
1112
1113 snprintf(fwname, sizeof(fwname),
1114 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
1115 dev_id & 0xffff, (fw_version & 0xff) + 1);
1116 err = mt79xx_setup(hdev, fwname);
1117 if (err < 0)
1118 return err;
1119
1120 /* Enable SCO over I2S/PCM */
1121 err = btmtksdio_sco_setting(hdev);
1122 if (err < 0) {
1123 bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err);
1124 return err;
1125 }
1126
1127 /* Enable WBS with mSBC codec */
1128 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
1129
1130 /* Enable GPIO reset mechanism */
1131 if (bdev->reset) {
1132 err = btmtksdio_reset_setting(hdev);
1133 if (err < 0) {
1134 bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err);
1135 devm_gpiod_put(bdev->dev, bdev->reset);
1136 bdev->reset = NULL;
1137 }
1138 }
1139
1140 /* Valid LE States quirk for MediaTek 7921 */
1141 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
1142
1143 break;
1144 case 0x7663:
1145 case 0x7668:
1146 err = mt76xx_setup(hdev, bdev->data->fwname);
1147 if (err < 0)
1148 return err;
1149 break;
1150 default:
1151 return -ENODEV;
1152 }
1153
1154 rettime = ktime_get();
1155 delta = ktime_sub(rettime, calltime);
1156 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1157
1158 pm_runtime_set_autosuspend_delay(bdev->dev,
1159 MTKBTSDIO_AUTOSUSPEND_DELAY);
1160 pm_runtime_use_autosuspend(bdev->dev);
1161
1162 err = pm_runtime_set_active(bdev->dev);
1163 if (err < 0)
1164 return err;
1165
1166 /* Default forbid runtime auto suspend, that can be allowed by
1167 * enable_autosuspend flag or the PM runtime entry under sysfs.
1168 */
1169 pm_runtime_forbid(bdev->dev);
1170 pm_runtime_enable(bdev->dev);
1171
1172 if (enable_autosuspend)
1173 pm_runtime_allow(bdev->dev);
1174
1175 bt_dev_info(hdev, "Device setup in %llu usecs", duration);
1176
1177 return 0;
1178}
1179
1180static int btmtksdio_shutdown(struct hci_dev *hdev)
1181{
1182 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1183 struct btmtk_hci_wmt_params wmt_params;
1184 u8 param = 0x0;
1185 int err;
1186
1187 /* Get back the state to be consistent with the state
1188 * in btmtksdio_setup.
1189 */
1190 pm_runtime_get_sync(bdev->dev);
1191
1192 /* wmt command only works until the reset is complete */
1193 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1194 goto ignore_wmt_cmd;
1195
1196 /* Disable the device */
1197 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1198 wmt_params.flag = 0;
1199 wmt_params.dlen = sizeof(param);
1200 wmt_params.data = ¶m;
1201 wmt_params.status = NULL;
1202
1203 err = mtk_hci_wmt_sync(hdev, &wmt_params);
1204 if (err < 0) {
1205 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1206 return err;
1207 }
1208
1209ignore_wmt_cmd:
1210 pm_runtime_put_noidle(bdev->dev);
1211 pm_runtime_disable(bdev->dev);
1212
1213 return 0;
1214}
1215
1216static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1217{
1218 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1219
1220 switch (hci_skb_pkt_type(skb)) {
1221 case HCI_COMMAND_PKT:
1222 hdev->stat.cmd_tx++;
1223 break;
1224
1225 case HCI_ACLDATA_PKT:
1226 hdev->stat.acl_tx++;
1227 break;
1228
1229 case HCI_SCODATA_PKT:
1230 hdev->stat.sco_tx++;
1231 break;
1232
1233 default:
1234 return -EILSEQ;
1235 }
1236
1237 skb_queue_tail(&bdev->txq, skb);
1238
1239 schedule_work(&bdev->txrx_work);
1240
1241 return 0;
1242}
1243
1244static void btmtksdio_cmd_timeout(struct hci_dev *hdev)
1245{
1246 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1247 u32 status;
1248 int err;
1249
1250 if (!bdev->reset || bdev->data->chipid != 0x7921)
1251 return;
1252
1253 pm_runtime_get_sync(bdev->dev);
1254
1255 if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1256 return;
1257
1258 sdio_claim_host(bdev->func);
1259
1260 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
1261 skb_queue_purge(&bdev->txq);
1262 cancel_work_sync(&bdev->txrx_work);
1263
1264 gpiod_set_value_cansleep(bdev->reset, 1);
1265 msleep(100);
1266 gpiod_set_value_cansleep(bdev->reset, 0);
1267
1268 err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status,
1269 status & BT_RST_DONE, 100000, 2000000);
1270 if (err < 0) {
1271 bt_dev_err(hdev, "Failed to reset (%d)", err);
1272 goto err;
1273 }
1274
1275 clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
1276err:
1277 sdio_release_host(bdev->func);
1278
1279 pm_runtime_put_noidle(bdev->dev);
1280 pm_runtime_disable(bdev->dev);
1281
1282 hci_reset_dev(hdev);
1283}
1284
1285static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
1286{
1287 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1288
1289 return device_may_wakeup(bdev->dev);
1290}
1291
1292static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
1293{
1294 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1295 bool may_wakeup = device_may_wakeup(bdev->dev);
1296 const struct btmtk_wakeon bt_awake = {
1297 .mode = 0x1,
1298 .gpo = 0,
1299 .active_high = 0x1,
1300 .enable_delay = cpu_to_le16(0xc80),
1301 .wakeup_delay = cpu_to_le16(0x20),
1302 };
1303
1304 if (may_wakeup && bdev->data->chipid == 0x7921) {
1305 struct sk_buff *skb;
1306
1307 skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake),
1308 &bt_awake, HCI_CMD_TIMEOUT);
1309 if (IS_ERR(skb))
1310 may_wakeup = false;
1311 else
1312 kfree_skb(skb);
1313 }
1314
1315 return may_wakeup;
1316}
1317
1318static int btmtksdio_probe(struct sdio_func *func,
1319 const struct sdio_device_id *id)
1320{
1321 struct btmtksdio_dev *bdev;
1322 struct hci_dev *hdev;
1323 int err;
1324
1325 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
1326 if (!bdev)
1327 return -ENOMEM;
1328
1329 bdev->data = (void *)id->driver_data;
1330 if (!bdev->data)
1331 return -ENODEV;
1332
1333 bdev->dev = &func->dev;
1334 bdev->func = func;
1335
1336 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work);
1337 skb_queue_head_init(&bdev->txq);
1338
1339 /* Initialize and register HCI device */
1340 hdev = hci_alloc_dev();
1341 if (!hdev) {
1342 dev_err(&func->dev, "Can't allocate HCI device\n");
1343 return -ENOMEM;
1344 }
1345
1346 bdev->hdev = hdev;
1347
1348 hdev->bus = HCI_SDIO;
1349 hci_set_drvdata(hdev, bdev);
1350
1351 hdev->open = btmtksdio_open;
1352 hdev->close = btmtksdio_close;
1353 hdev->cmd_timeout = btmtksdio_cmd_timeout;
1354 hdev->flush = btmtksdio_flush;
1355 hdev->setup = btmtksdio_setup;
1356 hdev->shutdown = btmtksdio_shutdown;
1357 hdev->send = btmtksdio_send_frame;
1358 hdev->wakeup = btmtksdio_sdio_wakeup;
1359 /*
1360 * If SDIO controller supports wake on Bluetooth, sending a wakeon
1361 * command is not necessary.
1362 */
1363 if (device_can_wakeup(func->card->host->parent))
1364 hdev->wakeup = btmtksdio_sdio_inband_wakeup;
1365 else
1366 hdev->wakeup = btmtksdio_sdio_wakeup;
1367 hdev->set_bdaddr = btmtk_set_bdaddr;
1368
1369 SET_HCIDEV_DEV(hdev, &func->dev);
1370
1371 hdev->manufacturer = 70;
1372 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
1373
1374 sdio_set_drvdata(func, bdev);
1375
1376 err = hci_register_dev(hdev);
1377 if (err < 0) {
1378 dev_err(&func->dev, "Can't register HCI device\n");
1379 hci_free_dev(hdev);
1380 return err;
1381 }
1382
1383 /* pm_runtime_enable would be done after the firmware is being
1384 * downloaded because the core layer probably already enables
1385 * runtime PM for this func such as the case host->caps &
1386 * MMC_CAP_POWER_OFF_CARD.
1387 */
1388 if (pm_runtime_enabled(bdev->dev))
1389 pm_runtime_disable(bdev->dev);
1390
1391 /* As explaination in drivers/mmc/core/sdio_bus.c tells us:
1392 * Unbound SDIO functions are always suspended.
1393 * During probe, the function is set active and the usage count
1394 * is incremented. If the driver supports runtime PM,
1395 * it should call pm_runtime_put_noidle() in its probe routine and
1396 * pm_runtime_get_noresume() in its remove routine.
1397 *
1398 * So, put a pm_runtime_put_noidle here !
1399 */
1400 pm_runtime_put_noidle(bdev->dev);
1401
1402 err = device_init_wakeup(bdev->dev, true);
1403 if (err)
1404 bt_dev_err(hdev, "failed to initialize device wakeup");
1405
1406 bdev->dev->of_node = of_find_compatible_node(NULL, NULL,
1407 "mediatek,mt7921s-bluetooth");
1408 bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset",
1409 GPIOD_OUT_LOW);
1410 if (IS_ERR(bdev->reset))
1411 err = PTR_ERR(bdev->reset);
1412
1413 return err;
1414}
1415
1416static void btmtksdio_remove(struct sdio_func *func)
1417{
1418 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
1419 struct hci_dev *hdev;
1420
1421 if (!bdev)
1422 return;
1423
1424 /* Be consistent the state in btmtksdio_probe */
1425 pm_runtime_get_noresume(bdev->dev);
1426
1427 hdev = bdev->hdev;
1428
1429 sdio_set_drvdata(func, NULL);
1430 hci_unregister_dev(hdev);
1431 hci_free_dev(hdev);
1432}
1433
1434#ifdef CONFIG_PM
1435static int btmtksdio_runtime_suspend(struct device *dev)
1436{
1437 struct sdio_func *func = dev_to_sdio_func(dev);
1438 struct btmtksdio_dev *bdev;
1439 int err;
1440
1441 bdev = sdio_get_drvdata(func);
1442 if (!bdev)
1443 return 0;
1444
1445 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1446 return 0;
1447
1448 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1449
1450 err = btmtksdio_fw_pmctrl(bdev);
1451
1452 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err);
1453
1454 return err;
1455}
1456
1457static int btmtksdio_runtime_resume(struct device *dev)
1458{
1459 struct sdio_func *func = dev_to_sdio_func(dev);
1460 struct btmtksdio_dev *bdev;
1461 int err;
1462
1463 bdev = sdio_get_drvdata(func);
1464 if (!bdev)
1465 return 0;
1466
1467 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1468 return 0;
1469
1470 err = btmtksdio_drv_pmctrl(bdev);
1471
1472 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err);
1473
1474 return err;
1475}
1476
1477static UNIVERSAL_DEV_PM_OPS(btmtksdio_pm_ops, btmtksdio_runtime_suspend,
1478 btmtksdio_runtime_resume, NULL);
1479#define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
1480#else /* CONFIG_PM */
1481#define BTMTKSDIO_PM_OPS NULL
1482#endif /* CONFIG_PM */
1483
1484static struct sdio_driver btmtksdio_driver = {
1485 .name = "btmtksdio",
1486 .probe = btmtksdio_probe,
1487 .remove = btmtksdio_remove,
1488 .id_table = btmtksdio_table,
1489 .drv = {
1490 .owner = THIS_MODULE,
1491 .pm = BTMTKSDIO_PM_OPS,
1492 }
1493};
1494
1495module_sdio_driver(btmtksdio_driver);
1496
1497module_param(enable_autosuspend, bool, 0644);
1498MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
1499
1500MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1501MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
1502MODULE_VERSION(VERSION);
1503MODULE_LICENSE("GPL");