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
39 static bool enable_autosuspend = true;
40
41 struct btmtksdio_data {
42 const char *fwname;
43 u16 chipid;
44 bool lp_mbox_supported;
45 };
46
47 static const struct btmtksdio_data mt7663_data = {
48 .fwname = FIRMWARE_MT7663,
49 .chipid = 0x7663,
50 .lp_mbox_supported = false,
51 };
52
53 static const struct btmtksdio_data mt7668_data = {
54 .fwname = FIRMWARE_MT7668,
55 .chipid = 0x7668,
56 .lp_mbox_supported = false,
57 };
58
59 static const struct btmtksdio_data mt7921_data = {
60 .fwname = FIRMWARE_MT7961,
61 .chipid = 0x7921,
62 .lp_mbox_supported = true,
63 };
64
65 static 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 };
74 MODULE_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
124 struct mtkbtsdio_hdr {
125 __le16 len;
126 __le16 reserved;
127 u8 bt_type;
128 } __packed;
129
130 struct 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
mtk_hci_wmt_sync(struct hci_dev * hdev,struct btmtk_hci_wmt_params * wmt_params)146 static 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
249 err_free_skb:
250 kfree_skb(bdev->evt_skb);
251 bdev->evt_skb = NULL;
252 err_free_wc:
253 kfree(wc);
254
255 return err;
256 }
257
btmtksdio_tx_packet(struct btmtksdio_dev * bdev,struct sk_buff * skb)258 static 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
292 err_skb_pull:
293 skb_pull(skb, sizeof(*sdio_hdr));
294
295 return err;
296 }
297
btmtksdio_drv_own_query(struct btmtksdio_dev * bdev)298 static u32 btmtksdio_drv_own_query(struct btmtksdio_dev *bdev)
299 {
300 return sdio_readl(bdev->func, MTK_REG_CHLPCR, NULL);
301 }
302
btmtksdio_drv_own_query_79xx(struct btmtksdio_dev * bdev)303 static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev)
304 {
305 return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL);
306 }
307
btmtksdio_chcr_query(struct btmtksdio_dev * bdev)308 static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev)
309 {
310 return sdio_readl(bdev->func, MTK_REG_CHCR, NULL);
311 }
312
btmtksdio_fw_pmctrl(struct btmtksdio_dev * bdev)313 static 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
341 out:
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
btmtksdio_drv_pmctrl(struct btmtksdio_dev * bdev)350 static 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
371 out:
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
btmtksdio_recv_event(struct hci_dev * hdev,struct sk_buff * skb)380 static 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
413 err_free_skb:
414 kfree_skb(bdev->evt_skb);
415 bdev->evt_skb = NULL;
416
417 err_out:
418 return err;
419 }
420
btmtksdio_recv_acl(struct hci_dev * hdev,struct sk_buff * skb)421 static 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
442 static 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
btmtksdio_rx_packet(struct btmtksdio_dev * bdev,u16 rx_size)448 static 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
539 err_kfree_skb:
540 kfree_skb(skb);
541
542 return err;
543 }
544
btmtksdio_txrx_work(struct work_struct * work)545 static 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
btmtksdio_interrupt(struct sdio_func * func)622 static 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
btmtksdio_open(struct hci_dev * hdev)638 static 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
710 err_release_irq:
711 sdio_release_irq(bdev->func);
712
713 err_disable_func:
714 sdio_disable_func(bdev->func);
715
716 err_release_host:
717 sdio_release_host(bdev->func);
718
719 return err;
720 }
721
btmtksdio_close(struct hci_dev * hdev)722 static int btmtksdio_close(struct hci_dev *hdev)
723 {
724 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
725
726 sdio_claim_host(bdev->func);
727
728 /* Disable interrupt */
729 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
730
731 sdio_release_irq(bdev->func);
732
733 cancel_work_sync(&bdev->txrx_work);
734
735 btmtksdio_fw_pmctrl(bdev);
736
737 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
738 sdio_disable_func(bdev->func);
739
740 sdio_release_host(bdev->func);
741
742 return 0;
743 }
744
btmtksdio_flush(struct hci_dev * hdev)745 static int btmtksdio_flush(struct hci_dev *hdev)
746 {
747 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
748
749 skb_queue_purge(&bdev->txq);
750
751 cancel_work_sync(&bdev->txrx_work);
752
753 return 0;
754 }
755
btmtksdio_func_query(struct hci_dev * hdev)756 static int btmtksdio_func_query(struct hci_dev *hdev)
757 {
758 struct btmtk_hci_wmt_params wmt_params;
759 int status, err;
760 u8 param = 0;
761
762 /* Query whether the function is enabled */
763 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
764 wmt_params.flag = 4;
765 wmt_params.dlen = sizeof(param);
766 wmt_params.data = ¶m;
767 wmt_params.status = &status;
768
769 err = mtk_hci_wmt_sync(hdev, &wmt_params);
770 if (err < 0) {
771 bt_dev_err(hdev, "Failed to query function status (%d)", err);
772 return err;
773 }
774
775 return status;
776 }
777
mt76xx_setup(struct hci_dev * hdev,const char * fwname)778 static int mt76xx_setup(struct hci_dev *hdev, const char *fwname)
779 {
780 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
781 struct btmtk_hci_wmt_params wmt_params;
782 struct btmtk_tci_sleep tci_sleep;
783 struct sk_buff *skb;
784 int err, status;
785 u8 param = 0x1;
786
787 /* Query whether the firmware is already download */
788 wmt_params.op = BTMTK_WMT_SEMAPHORE;
789 wmt_params.flag = 1;
790 wmt_params.dlen = 0;
791 wmt_params.data = NULL;
792 wmt_params.status = &status;
793
794 err = mtk_hci_wmt_sync(hdev, &wmt_params);
795 if (err < 0) {
796 bt_dev_err(hdev, "Failed to query firmware status (%d)", err);
797 return err;
798 }
799
800 if (status == BTMTK_WMT_PATCH_DONE) {
801 bt_dev_info(hdev, "Firmware already downloaded");
802 goto ignore_setup_fw;
803 }
804
805 /* Setup a firmware which the device definitely requires */
806 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync);
807 if (err < 0)
808 return err;
809
810 ignore_setup_fw:
811 /* Query whether the device is already enabled */
812 err = readx_poll_timeout(btmtksdio_func_query, hdev, status,
813 status < 0 || status != BTMTK_WMT_ON_PROGRESS,
814 2000, 5000000);
815 /* -ETIMEDOUT happens */
816 if (err < 0)
817 return err;
818
819 /* The other errors happen in btusb_mtk_func_query */
820 if (status < 0)
821 return status;
822
823 if (status == BTMTK_WMT_ON_DONE) {
824 bt_dev_info(hdev, "function already on");
825 goto ignore_func_on;
826 }
827
828 /* Enable Bluetooth protocol */
829 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
830 wmt_params.flag = 0;
831 wmt_params.dlen = sizeof(param);
832 wmt_params.data = ¶m;
833 wmt_params.status = NULL;
834
835 err = mtk_hci_wmt_sync(hdev, &wmt_params);
836 if (err < 0) {
837 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
838 return err;
839 }
840
841 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
842
843 ignore_func_on:
844 /* Apply the low power environment setup */
845 tci_sleep.mode = 0x5;
846 tci_sleep.duration = cpu_to_le16(0x640);
847 tci_sleep.host_duration = cpu_to_le16(0x640);
848 tci_sleep.host_wakeup_pin = 0;
849 tci_sleep.time_compensation = 0;
850
851 skb = __hci_cmd_sync(hdev, 0xfc7a, sizeof(tci_sleep), &tci_sleep,
852 HCI_INIT_TIMEOUT);
853 if (IS_ERR(skb)) {
854 err = PTR_ERR(skb);
855 bt_dev_err(hdev, "Failed to apply low power setting (%d)", err);
856 return err;
857 }
858 kfree_skb(skb);
859
860 return 0;
861 }
862
mt79xx_setup(struct hci_dev * hdev,const char * fwname)863 static int mt79xx_setup(struct hci_dev *hdev, const char *fwname)
864 {
865 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
866 struct btmtk_hci_wmt_params wmt_params;
867 u8 param = 0x1;
868 int err;
869
870 err = btmtk_setup_firmware_79xx(hdev, fwname, mtk_hci_wmt_sync);
871 if (err < 0) {
872 bt_dev_err(hdev, "Failed to setup 79xx firmware (%d)", err);
873 return err;
874 }
875
876 err = btmtksdio_fw_pmctrl(bdev);
877 if (err < 0)
878 return err;
879
880 err = btmtksdio_drv_pmctrl(bdev);
881 if (err < 0)
882 return err;
883
884 /* Enable Bluetooth protocol */
885 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
886 wmt_params.flag = 0;
887 wmt_params.dlen = sizeof(param);
888 wmt_params.data = ¶m;
889 wmt_params.status = NULL;
890
891 err = mtk_hci_wmt_sync(hdev, &wmt_params);
892 if (err < 0) {
893 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
894 return err;
895 }
896
897 hci_set_msft_opcode(hdev, 0xFD30);
898 hci_set_aosp_capable(hdev);
899 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
900
901 return err;
902 }
903
btmtksdio_mtk_reg_read(struct hci_dev * hdev,u32 reg,u32 * val)904 static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
905 {
906 struct btmtk_hci_wmt_params wmt_params;
907 struct reg_read_cmd reg_read = {
908 .type = 1,
909 .num = 1,
910 };
911 u32 status;
912 int err;
913
914 reg_read.addr = cpu_to_le32(reg);
915 wmt_params.op = BTMTK_WMT_REGISTER;
916 wmt_params.flag = BTMTK_WMT_REG_READ;
917 wmt_params.dlen = sizeof(reg_read);
918 wmt_params.data = ®_read;
919 wmt_params.status = &status;
920
921 err = mtk_hci_wmt_sync(hdev, &wmt_params);
922 if (err < 0) {
923 bt_dev_err(hdev, "Failed to read reg (%d)", err);
924 return err;
925 }
926
927 *val = status;
928
929 return err;
930 }
931
btmtksdio_mtk_reg_write(struct hci_dev * hdev,u32 reg,u32 val,u32 mask)932 static int btmtksdio_mtk_reg_write(struct hci_dev *hdev, u32 reg, u32 val, u32 mask)
933 {
934 struct btmtk_hci_wmt_params wmt_params;
935 const struct reg_write_cmd reg_write = {
936 .type = 1,
937 .num = 1,
938 .addr = cpu_to_le32(reg),
939 .data = cpu_to_le32(val),
940 .mask = cpu_to_le32(mask),
941 };
942 int err, status;
943
944 wmt_params.op = BTMTK_WMT_REGISTER;
945 wmt_params.flag = BTMTK_WMT_REG_WRITE;
946 wmt_params.dlen = sizeof(reg_write);
947 wmt_params.data = ®_write;
948 wmt_params.status = &status;
949
950 err = mtk_hci_wmt_sync(hdev, &wmt_params);
951 if (err < 0)
952 bt_dev_err(hdev, "Failed to write reg (%d)", err);
953
954 return err;
955 }
956
btmtksdio_get_data_path_id(struct hci_dev * hdev,__u8 * data_path_id)957 static int btmtksdio_get_data_path_id(struct hci_dev *hdev, __u8 *data_path_id)
958 {
959 /* uses 1 as data path id for all the usecases */
960 *data_path_id = 1;
961 return 0;
962 }
963
btmtksdio_get_codec_config_data(struct hci_dev * hdev,__u8 link,struct bt_codec * codec,__u8 * ven_len,__u8 ** ven_data)964 static int btmtksdio_get_codec_config_data(struct hci_dev *hdev,
965 __u8 link, struct bt_codec *codec,
966 __u8 *ven_len, __u8 **ven_data)
967 {
968 int err = 0;
969
970 if (!ven_data || !ven_len)
971 return -EINVAL;
972
973 *ven_len = 0;
974 *ven_data = NULL;
975
976 if (link != ESCO_LINK) {
977 bt_dev_err(hdev, "Invalid link type(%u)", link);
978 return -EINVAL;
979 }
980
981 *ven_data = kmalloc(sizeof(__u8), GFP_KERNEL);
982 if (!*ven_data) {
983 err = -ENOMEM;
984 goto error;
985 }
986
987 /* supports only CVSD and mSBC offload codecs */
988 switch (codec->id) {
989 case 0x02:
990 **ven_data = 0x00;
991 break;
992 case 0x05:
993 **ven_data = 0x01;
994 break;
995 default:
996 err = -EINVAL;
997 bt_dev_err(hdev, "Invalid codec id(%u)", codec->id);
998 goto error;
999 }
1000 /* codec and its capabilities are pre-defined to ids
1001 * preset id = 0x00 represents CVSD codec with sampling rate 8K
1002 * preset id = 0x01 represents mSBC codec with sampling rate 16K
1003 */
1004 *ven_len = sizeof(__u8);
1005 return err;
1006
1007 error:
1008 kfree(*ven_data);
1009 *ven_data = NULL;
1010 return err;
1011 }
1012
btmtksdio_sco_setting(struct hci_dev * hdev)1013 static int btmtksdio_sco_setting(struct hci_dev *hdev)
1014 {
1015 const struct btmtk_sco sco_setting = {
1016 .clock_config = 0x49,
1017 .channel_format_config = 0x80,
1018 };
1019 struct sk_buff *skb;
1020 u32 val;
1021 int err;
1022
1023 /* Enable SCO over I2S/PCM for MediaTek chipset */
1024 skb = __hci_cmd_sync(hdev, 0xfc72, sizeof(sco_setting),
1025 &sco_setting, HCI_CMD_TIMEOUT);
1026 if (IS_ERR(skb))
1027 return PTR_ERR(skb);
1028
1029 kfree_skb(skb);
1030
1031 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val);
1032 if (err < 0)
1033 return err;
1034
1035 val |= 0x11000000;
1036 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_0, val, ~0);
1037 if (err < 0)
1038 return err;
1039
1040 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1041 if (err < 0)
1042 return err;
1043
1044 val |= 0x00000101;
1045 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1046 if (err < 0)
1047 return err;
1048
1049 hdev->get_data_path_id = btmtksdio_get_data_path_id;
1050 hdev->get_codec_config_data = btmtksdio_get_codec_config_data;
1051
1052 return err;
1053 }
1054
btmtksdio_reset_setting(struct hci_dev * hdev)1055 static int btmtksdio_reset_setting(struct hci_dev *hdev)
1056 {
1057 int err;
1058 u32 val;
1059
1060 err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
1061 if (err < 0)
1062 return err;
1063
1064 val |= 0x20; /* set the pin (bit field 11:8) work as GPIO mode */
1065 err = btmtksdio_mtk_reg_write(hdev, MT7921_PINMUX_1, val, ~0);
1066 if (err < 0)
1067 return err;
1068
1069 err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val);
1070 if (err < 0)
1071 return err;
1072
1073 val |= MT7921_BTSYS_RST_WITH_GPIO;
1074 return btmtksdio_mtk_reg_write(hdev, MT7921_BTSYS_RST, val, ~0);
1075 }
1076
btmtksdio_setup(struct hci_dev * hdev)1077 static int btmtksdio_setup(struct hci_dev *hdev)
1078 {
1079 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1080 ktime_t calltime, delta, rettime;
1081 unsigned long long duration;
1082 char fwname[64];
1083 int err, dev_id;
1084 u32 fw_version = 0, val;
1085
1086 calltime = ktime_get();
1087 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
1088
1089 switch (bdev->data->chipid) {
1090 case 0x7921:
1091 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state)) {
1092 err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS,
1093 &val);
1094 if (err < 0)
1095 return err;
1096
1097 val &= ~BT_DL_STATE;
1098 err = btmtksdio_mtk_reg_write(hdev, MT7921_DLSTATUS,
1099 val, ~0);
1100 if (err < 0)
1101 return err;
1102
1103 btmtksdio_fw_pmctrl(bdev);
1104 msleep(20);
1105 btmtksdio_drv_pmctrl(bdev);
1106
1107 clear_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state);
1108 }
1109
1110 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id);
1111 if (err < 0) {
1112 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1113 return err;
1114 }
1115
1116 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version);
1117 if (err < 0) {
1118 bt_dev_err(hdev, "Failed to get fw version (%d)", err);
1119 return err;
1120 }
1121
1122 btmtk_fw_get_filename(fwname, sizeof(fwname), dev_id,
1123 fw_version, 0);
1124
1125 snprintf(fwname, sizeof(fwname),
1126 "mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
1127 dev_id & 0xffff, (fw_version & 0xff) + 1);
1128 err = mt79xx_setup(hdev, fwname);
1129 if (err < 0)
1130 return err;
1131
1132 /* Enable SCO over I2S/PCM */
1133 err = btmtksdio_sco_setting(hdev);
1134 if (err < 0) {
1135 bt_dev_err(hdev, "Failed to enable SCO setting (%d)", err);
1136 return err;
1137 }
1138
1139 /* Enable WBS with mSBC codec */
1140 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
1141
1142 /* Enable GPIO reset mechanism */
1143 if (bdev->reset) {
1144 err = btmtksdio_reset_setting(hdev);
1145 if (err < 0) {
1146 bt_dev_err(hdev, "Failed to enable Reset setting (%d)", err);
1147 devm_gpiod_put(bdev->dev, bdev->reset);
1148 bdev->reset = NULL;
1149 }
1150 }
1151
1152 break;
1153 case 0x7663:
1154 case 0x7668:
1155 err = mt76xx_setup(hdev, bdev->data->fwname);
1156 if (err < 0)
1157 return err;
1158 break;
1159 default:
1160 return -ENODEV;
1161 }
1162
1163 rettime = ktime_get();
1164 delta = ktime_sub(rettime, calltime);
1165 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1166
1167 pm_runtime_set_autosuspend_delay(bdev->dev,
1168 MTKBTSDIO_AUTOSUSPEND_DELAY);
1169 pm_runtime_use_autosuspend(bdev->dev);
1170
1171 err = pm_runtime_set_active(bdev->dev);
1172 if (err < 0)
1173 return err;
1174
1175 /* Default forbid runtime auto suspend, that can be allowed by
1176 * enable_autosuspend flag or the PM runtime entry under sysfs.
1177 */
1178 pm_runtime_forbid(bdev->dev);
1179 pm_runtime_enable(bdev->dev);
1180
1181 if (enable_autosuspend)
1182 pm_runtime_allow(bdev->dev);
1183
1184 bt_dev_info(hdev, "Device setup in %llu usecs", duration);
1185
1186 return 0;
1187 }
1188
btmtksdio_shutdown(struct hci_dev * hdev)1189 static int btmtksdio_shutdown(struct hci_dev *hdev)
1190 {
1191 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1192 struct btmtk_hci_wmt_params wmt_params;
1193 u8 param = 0x0;
1194 int err;
1195
1196 /* Get back the state to be consistent with the state
1197 * in btmtksdio_setup.
1198 */
1199 pm_runtime_get_sync(bdev->dev);
1200
1201 /* wmt command only works until the reset is complete */
1202 if (test_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1203 goto ignore_wmt_cmd;
1204
1205 /* Disable the device */
1206 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
1207 wmt_params.flag = 0;
1208 wmt_params.dlen = sizeof(param);
1209 wmt_params.data = ¶m;
1210 wmt_params.status = NULL;
1211
1212 err = mtk_hci_wmt_sync(hdev, &wmt_params);
1213 if (err < 0) {
1214 bt_dev_err(hdev, "Failed to send wmt func ctrl (%d)", err);
1215 return err;
1216 }
1217
1218 ignore_wmt_cmd:
1219 pm_runtime_put_noidle(bdev->dev);
1220 pm_runtime_disable(bdev->dev);
1221
1222 return 0;
1223 }
1224
btmtksdio_send_frame(struct hci_dev * hdev,struct sk_buff * skb)1225 static int btmtksdio_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
1226 {
1227 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1228
1229 switch (hci_skb_pkt_type(skb)) {
1230 case HCI_COMMAND_PKT:
1231 hdev->stat.cmd_tx++;
1232 break;
1233
1234 case HCI_ACLDATA_PKT:
1235 hdev->stat.acl_tx++;
1236 break;
1237
1238 case HCI_SCODATA_PKT:
1239 hdev->stat.sco_tx++;
1240 break;
1241
1242 default:
1243 return -EILSEQ;
1244 }
1245
1246 skb_queue_tail(&bdev->txq, skb);
1247
1248 schedule_work(&bdev->txrx_work);
1249
1250 return 0;
1251 }
1252
btmtksdio_reset(struct hci_dev * hdev)1253 static void btmtksdio_reset(struct hci_dev *hdev)
1254 {
1255 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1256 u32 status;
1257 int err;
1258
1259 if (!bdev->reset || bdev->data->chipid != 0x7921)
1260 return;
1261
1262 pm_runtime_get_sync(bdev->dev);
1263
1264 if (test_and_set_bit(BTMTKSDIO_HW_RESET_ACTIVE, &bdev->tx_state))
1265 return;
1266
1267 sdio_claim_host(bdev->func);
1268
1269 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
1270 skb_queue_purge(&bdev->txq);
1271 cancel_work_sync(&bdev->txrx_work);
1272
1273 gpiod_set_value_cansleep(bdev->reset, 1);
1274 msleep(100);
1275 gpiod_set_value_cansleep(bdev->reset, 0);
1276
1277 err = readx_poll_timeout(btmtksdio_chcr_query, bdev, status,
1278 status & BT_RST_DONE, 100000, 2000000);
1279 if (err < 0) {
1280 bt_dev_err(hdev, "Failed to reset (%d)", err);
1281 goto err;
1282 }
1283
1284 clear_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
1285 err:
1286 sdio_release_host(bdev->func);
1287
1288 pm_runtime_put_noidle(bdev->dev);
1289 pm_runtime_disable(bdev->dev);
1290
1291 hci_reset_dev(hdev);
1292 }
1293
btmtksdio_sdio_inband_wakeup(struct hci_dev * hdev)1294 static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
1295 {
1296 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1297
1298 return device_may_wakeup(bdev->dev);
1299 }
1300
btmtksdio_sdio_wakeup(struct hci_dev * hdev)1301 static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
1302 {
1303 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
1304 bool may_wakeup = device_may_wakeup(bdev->dev);
1305 const struct btmtk_wakeon bt_awake = {
1306 .mode = 0x1,
1307 .gpo = 0,
1308 .active_high = 0x1,
1309 .enable_delay = cpu_to_le16(0xc80),
1310 .wakeup_delay = cpu_to_le16(0x20),
1311 };
1312
1313 if (may_wakeup && bdev->data->chipid == 0x7921) {
1314 struct sk_buff *skb;
1315
1316 skb = __hci_cmd_sync(hdev, 0xfc27, sizeof(bt_awake),
1317 &bt_awake, HCI_CMD_TIMEOUT);
1318 if (IS_ERR(skb))
1319 may_wakeup = false;
1320 else
1321 kfree_skb(skb);
1322 }
1323
1324 return may_wakeup;
1325 }
1326
btmtksdio_probe(struct sdio_func * func,const struct sdio_device_id * id)1327 static int btmtksdio_probe(struct sdio_func *func,
1328 const struct sdio_device_id *id)
1329 {
1330 struct btmtksdio_dev *bdev;
1331 struct hci_dev *hdev;
1332 struct device_node *old_node;
1333 bool restore_node;
1334 int err;
1335
1336 bdev = devm_kzalloc(&func->dev, sizeof(*bdev), GFP_KERNEL);
1337 if (!bdev)
1338 return -ENOMEM;
1339
1340 bdev->data = (void *)id->driver_data;
1341 if (!bdev->data)
1342 return -ENODEV;
1343
1344 bdev->dev = &func->dev;
1345 bdev->func = func;
1346
1347 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work);
1348 skb_queue_head_init(&bdev->txq);
1349
1350 /* Initialize and register HCI device */
1351 hdev = hci_alloc_dev();
1352 if (!hdev) {
1353 dev_err(&func->dev, "Can't allocate HCI device\n");
1354 return -ENOMEM;
1355 }
1356
1357 bdev->hdev = hdev;
1358
1359 hdev->bus = HCI_SDIO;
1360 hci_set_drvdata(hdev, bdev);
1361
1362 hdev->open = btmtksdio_open;
1363 hdev->close = btmtksdio_close;
1364 hdev->reset = btmtksdio_reset;
1365 hdev->flush = btmtksdio_flush;
1366 hdev->setup = btmtksdio_setup;
1367 hdev->shutdown = btmtksdio_shutdown;
1368 hdev->send = btmtksdio_send_frame;
1369 hdev->wakeup = btmtksdio_sdio_wakeup;
1370 /*
1371 * If SDIO controller supports wake on Bluetooth, sending a wakeon
1372 * command is not necessary.
1373 */
1374 if (device_can_wakeup(func->card->host->parent))
1375 hdev->wakeup = btmtksdio_sdio_inband_wakeup;
1376 else
1377 hdev->wakeup = btmtksdio_sdio_wakeup;
1378 hdev->set_bdaddr = btmtk_set_bdaddr;
1379
1380 SET_HCIDEV_DEV(hdev, &func->dev);
1381
1382 hdev->manufacturer = 70;
1383 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
1384
1385 sdio_set_drvdata(func, bdev);
1386
1387 err = hci_register_dev(hdev);
1388 if (err < 0) {
1389 dev_err(&func->dev, "Can't register HCI device\n");
1390 hci_free_dev(hdev);
1391 return err;
1392 }
1393
1394 /* pm_runtime_enable would be done after the firmware is being
1395 * downloaded because the core layer probably already enables
1396 * runtime PM for this func such as the case host->caps &
1397 * MMC_CAP_POWER_OFF_CARD.
1398 */
1399 if (pm_runtime_enabled(bdev->dev))
1400 pm_runtime_disable(bdev->dev);
1401
1402 /* As explanation in drivers/mmc/core/sdio_bus.c tells us:
1403 * Unbound SDIO functions are always suspended.
1404 * During probe, the function is set active and the usage count
1405 * is incremented. If the driver supports runtime PM,
1406 * it should call pm_runtime_put_noidle() in its probe routine and
1407 * pm_runtime_get_noresume() in its remove routine.
1408 *
1409 * So, put a pm_runtime_put_noidle here !
1410 */
1411 pm_runtime_put_noidle(bdev->dev);
1412
1413 err = device_init_wakeup(bdev->dev, true);
1414 if (err)
1415 bt_dev_err(hdev, "failed to initialize device wakeup");
1416
1417 restore_node = false;
1418 if (!of_device_is_compatible(bdev->dev->of_node, "mediatek,mt7921s-bluetooth")) {
1419 restore_node = true;
1420 old_node = bdev->dev->of_node;
1421 bdev->dev->of_node = of_find_compatible_node(NULL, NULL,
1422 "mediatek,mt7921s-bluetooth");
1423 }
1424
1425 bdev->reset = devm_gpiod_get_optional(bdev->dev, "reset",
1426 GPIOD_OUT_LOW);
1427 if (IS_ERR(bdev->reset))
1428 err = PTR_ERR(bdev->reset);
1429
1430 if (restore_node) {
1431 of_node_put(bdev->dev->of_node);
1432 bdev->dev->of_node = old_node;
1433 }
1434
1435 return err;
1436 }
1437
btmtksdio_remove(struct sdio_func * func)1438 static void btmtksdio_remove(struct sdio_func *func)
1439 {
1440 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
1441 struct hci_dev *hdev;
1442
1443 if (!bdev)
1444 return;
1445
1446 /* Be consistent the state in btmtksdio_probe */
1447 pm_runtime_get_noresume(bdev->dev);
1448
1449 hdev = bdev->hdev;
1450
1451 sdio_set_drvdata(func, NULL);
1452 hci_unregister_dev(hdev);
1453 hci_free_dev(hdev);
1454 }
1455
1456 #ifdef CONFIG_PM
btmtksdio_runtime_suspend(struct device * dev)1457 static int btmtksdio_runtime_suspend(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 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1471
1472 err = btmtksdio_fw_pmctrl(bdev);
1473
1474 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err);
1475
1476 return err;
1477 }
1478
btmtksdio_system_suspend(struct device * dev)1479 static int btmtksdio_system_suspend(struct device *dev)
1480 {
1481 struct sdio_func *func = dev_to_sdio_func(dev);
1482 struct btmtksdio_dev *bdev;
1483
1484 bdev = sdio_get_drvdata(func);
1485 if (!bdev)
1486 return 0;
1487
1488 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1489 return 0;
1490
1491 set_bit(BTMTKSDIO_BT_WAKE_ENABLED, &bdev->tx_state);
1492
1493 return btmtksdio_runtime_suspend(dev);
1494 }
1495
btmtksdio_runtime_resume(struct device * dev)1496 static int btmtksdio_runtime_resume(struct device *dev)
1497 {
1498 struct sdio_func *func = dev_to_sdio_func(dev);
1499 struct btmtksdio_dev *bdev;
1500 int err;
1501
1502 bdev = sdio_get_drvdata(func);
1503 if (!bdev)
1504 return 0;
1505
1506 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1507 return 0;
1508
1509 err = btmtksdio_drv_pmctrl(bdev);
1510
1511 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err);
1512
1513 return err;
1514 }
1515
btmtksdio_system_resume(struct device * dev)1516 static int btmtksdio_system_resume(struct device *dev)
1517 {
1518 return btmtksdio_runtime_resume(dev);
1519 }
1520
1521 static const struct dev_pm_ops btmtksdio_pm_ops = {
1522 SYSTEM_SLEEP_PM_OPS(btmtksdio_system_suspend, btmtksdio_system_resume)
1523 RUNTIME_PM_OPS(btmtksdio_runtime_suspend, btmtksdio_runtime_resume, NULL)
1524 };
1525
1526 #define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
1527 #else /* CONFIG_PM */
1528 #define BTMTKSDIO_PM_OPS NULL
1529 #endif /* CONFIG_PM */
1530
1531 static struct sdio_driver btmtksdio_driver = {
1532 .name = "btmtksdio",
1533 .probe = btmtksdio_probe,
1534 .remove = btmtksdio_remove,
1535 .id_table = btmtksdio_table,
1536 .drv = {
1537 .pm = BTMTKSDIO_PM_OPS,
1538 }
1539 };
1540
1541 module_sdio_driver(btmtksdio_driver);
1542
1543 module_param(enable_autosuspend, bool, 0644);
1544 MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
1545
1546 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1547 MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
1548 MODULE_VERSION(VERSION);
1549 MODULE_LICENSE("GPL");
1550