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Merge tag 'dmaengine-fix-6.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-block.git] / drivers / bluetooth / btmtksdio.c
CommitLineData
9aebfd4a
SW		 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>
8fafe702 15#include <linux/gpio/consumer.h>
9aebfd4a
SW		 16#include <linux/init.h>
17#include <linux/iopoll.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
8fafe702 20#include <linux/of.h>
7f3c563c 21#include <linux/pm_runtime.h>
9aebfd4a
SW		 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"
3a722044 32#include "btmtk.h"
9aebfd4a
SW		 33
34#define VERSION "0.1"
35
e98aa38c 36#define MTKBTSDIO_AUTOSUSPEND_DELAY 1000
7f3c563c 37
e98aa38c 38static bool enable_autosuspend = true;
7f3c563c 39
9aebfd4a
SW		 40struct btmtksdio_data {
41 const char *fwname;
c603bf1f 42 u16 chipid;
01ecc177 43 bool lp_mbox_supported;
9aebfd4a
SW		 44};
45
46static const struct btmtksdio_data mt7663_data = {
47 .fwname = FIRMWARE_MT7663,
c603bf1f 48 .chipid = 0x7663,
01ecc177 49 .lp_mbox_supported = false,
9aebfd4a
SW		 50};
51
52static const struct btmtksdio_data mt7668_data = {
53 .fwname = FIRMWARE_MT7668,
c603bf1f 54 .chipid = 0x7668,
01ecc177 55 .lp_mbox_supported = false,
c603bf1f
SW		 56};
57
58static const struct btmtksdio_data mt7921_data = {
59 .fwname = FIRMWARE_MT7961,
60 .chipid = 0x7921,
01ecc177 61 .lp_mbox_supported = true,
9aebfd4a
SW		 62};
63
64static const struct sdio_device_id btmtksdio_table[] = {
baaa110d 65 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7663),
9aebfd4a 66 .driver_data = (kernel_ulong_t)&mt7663_data },
baaa110d 67 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7668),
9aebfd4a 68 .driver_data = (kernel_ulong_t)&mt7668_data },
c603bf1f
SW		 69 {SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, SDIO_DEVICE_ID_MEDIATEK_MT7961),
70 .driver_data = (kernel_ulong_t)&mt7921_data },
9aebfd4a
SW		 71 { } /* Terminating entry */
72};
53121a7c 73MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
9aebfd4a
SW		 74
75#define MTK_REG_CHLPCR 0x4 /* W1S */
76#define C_INT_EN_SET BIT(0)
77#define C_INT_EN_CLR BIT(1)
2e47cc2b
SW		 78#define C_FW_OWN_REQ_SET BIT(8) /* For write */
79#define C_COM_DRV_OWN BIT(8) /* For read */
9aebfd4a
SW		 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)
8fafe702 88#define BT_RST_DONE BIT(8)
9aebfd4a
SW		 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)
2fc967cc 97#define FW_MAILBOX_INT BIT(15)
db3f1f9b 98#define INT_MASK GENMASK(15, 0)
9aebfd4a
SW		 99#define RX_PKT_LEN GENMASK(31, 16)
100
01ecc177
MC		 101#define MTK_REG_CSICR 0xc0
102#define CSICR_CLR_MBOX_ACK BIT(0)
2fc967cc
MC		 103#define MTK_REG_PH2DSM0R 0xc4
104#define PH2DSM0R_DRIVER_OWN BIT(0)
01ecc177
MC		 105#define MTK_REG_PD2HRM0R 0xdc
106#define PD2HRM0R_DRV_OWN BIT(0)
2fc967cc 107
9aebfd4a
SW		 108#define MTK_REG_CTDR 0x18
109
110#define MTK_REG_CRDR 0x1c
111
184ea403
SW		 112#define MTK_REG_CRPLR 0x24
113
9aebfd4a
SW		 114#define MTK_SDIO_BLOCK_SIZE 256
115
116#define BTMTKSDIO_TX_WAIT_VND_EVT 1
d555b1f2 117#define BTMTKSDIO_HW_TX_READY 2
4b4b2228 118#define BTMTKSDIO_FUNC_ENABLED 3
01ecc177 119#define BTMTKSDIO_PATCH_ENABLED 4
8fafe702 120#define BTMTKSDIO_HW_RESET_ACTIVE 5
4ed924fc 121#define BTMTKSDIO_BT_WAKE_ENABLED 6
9aebfd4a 122
9aebfd4a
SW		 123struct mtkbtsdio_hdr {
124 __le16 len;
125 __le16 reserved;
126 u8 bt_type;
127} __packed;
128
9aebfd4a
SW		 129struct btmtksdio_dev {
130 struct hci_dev *hdev;
131 struct sdio_func *func;
7f3c563c 132 struct device *dev;
9aebfd4a 133
26270bc1 134 struct work_struct txrx_work;
9aebfd4a
SW		 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;
8fafe702
CYC		 141
142 struct gpio_desc *reset;
9aebfd4a
SW		 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;
c603bf1f 150 struct btmtk_hci_wmt_evt_reg *wmt_evt_reg;
9aebfd4a
SW		 151 u32 hlen, status = BTMTK_WMT_INVALID;
152 struct btmtk_hci_wmt_evt *wmt_evt;
3a722044
SW		 153 struct btmtk_hci_wmt_cmd *wc;
154 struct btmtk_wmt_hdr *hdr;
9aebfd4a
SW		 155 int err;
156
3a722044 157 /* Send the WMT command and wait until the WMT event returns */
9aebfd4a
SW		 158 hlen = sizeof(*hdr) + wmt_params->dlen;
159 if (hlen > 255)
160 return -EINVAL;
161
3a722044
SW		 162 wc = kzalloc(hlen, GFP_KERNEL);
163 if (!wc)
164 return -ENOMEM;
165
166 hdr = &wc->hdr;
9aebfd4a
SW		 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;
3a722044 171 memcpy(wc->data, wmt_params->data, wmt_params->dlen);
9aebfd4a
SW		 172
173 set_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
174
3a722044 175 err = __hci_cmd_send(hdev, 0xfc6f, hlen, wc);
9aebfd4a
SW		 176 if (err < 0) {
177 clear_bit(BTMTKSDIO_TX_WAIT_VND_EVT, &bdev->tx_state);
3a722044 178 goto err_free_wc;
9aebfd4a
SW		 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);
3a722044 195 goto err_free_wc;
9aebfd4a
SW		 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);
3a722044
SW		 201 err = -ETIMEDOUT;
202 goto err_free_wc;
9aebfd4a
SW		 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) {
3a722044 215 case BTMTK_WMT_SEMAPHORE:
9aebfd4a
SW		 216 if (wmt_evt->whdr.flag == 2)
217 status = BTMTK_WMT_PATCH_UNDONE;
218 else
219 status = BTMTK_WMT_PATCH_DONE;
220 break;
3a722044 221 case BTMTK_WMT_FUNC_CTRL:
9aebfd4a
SW		 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;
c603bf1f
SW		 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;
9aebfd4a
SW		 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;
3a722044
SW		 251err_free_wc:
252 kfree(wc);
9aebfd4a
SW		 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
d555b1f2 279 clear_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
9aebfd4a
SW		 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
01ecc177
MC		 302static u32 btmtksdio_drv_own_query_79xx(struct btmtksdio_dev *bdev)
303{
304 return sdio_readl(bdev->func, MTK_REG_PD2HRM0R, NULL);
305}
306
8fafe702
CYC		 307static u32 btmtksdio_chcr_query(struct btmtksdio_dev *bdev)
308{
309 return sdio_readl(bdev->func, MTK_REG_CHCR, NULL);
310}
311
c7e301d7
MC		 312static int btmtksdio_fw_pmctrl(struct btmtksdio_dev *bdev)
313{
314 u32 status;
315 int err;
316
317 sdio_claim_host(bdev->func);
318
01ecc177
MC		 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
c7e301d7
MC		 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
01ecc177
MC		 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
c7e301d7
MC		 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
9aebfd4a
SW		 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;
0fab6361 383 u8 evt = hdr->evt;
9aebfd4a
SW		 384 int err;
385
9aebfd4a
SW		 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
0fab6361 401 if (evt == HCI_EV_WMT) {
9aebfd4a
SW		 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
db57b625
SW		 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
9aebfd4a 441static const struct h4_recv_pkt mtk_recv_pkts[] = {
db57b625 442 { H4_RECV_ACL, .recv = btmtksdio_recv_acl },
9aebfd4a
SW		 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;
9aebfd4a
SW		 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
9aebfd4a
SW		 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) {
1ca2a394
JT		 509 case 1:
510 dlen = skb->data[(&pkts[i])->loff];
511 break;
512 case 2:
513 dlen = get_unaligned_le16(skb->data +
9aebfd4a 514 (&pkts[i])->loff);
1ca2a394
JT		 515 break;
516 default:
517 goto err_kfree_skb;
9aebfd4a
SW		 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
bcaa7d72
SW		 534 bdev->hdev->stat.byte_rx += rx_size;
535
9aebfd4a
SW		 536 return 0;
537
538err_kfree_skb:
9aebfd4a
SW		 539 kfree_skb(skb);
540
541 return err;
542}
543
26270bc1 544static void btmtksdio_txrx_work(struct work_struct *work)
9aebfd4a 545{
26270bc1
SW		 546 struct btmtksdio_dev *bdev = container_of(work, struct btmtksdio_dev,
547 txrx_work);
548 unsigned long txrx_timeout;
184ea403 549 u32 int_status, rx_size;
26270bc1 550 struct sk_buff *skb;
26270bc1 551 int err;
7f3c563c
SW		 552
553 pm_runtime_get_sync(bdev->dev);
554
555 sdio_claim_host(bdev->func);
556
9aebfd4a 557 /* Disable interrupt */
4ed924fc 558 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
9aebfd4a 559
26270bc1
SW		 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);
db3f1f9b 575 int_status &= INT_MASK;
26270bc1 576
2fc967cc
MC		 577 if ((int_status & FW_MAILBOX_INT) &&
578 bdev->data->chipid == 0x7921) {
579 sdio_writel(bdev->func, PH2DSM0R_DRIVER_OWN,
4ed924fc 580 MTK_REG_PH2DSM0R, NULL);
2fc967cc
MC		 581 }
582
26270bc1
SW		 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)
d555b1f2
SW		 587 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
588
26270bc1
SW		 589 else if (unlikely(int_status & TX_FIFO_OVERFLOW))
590 bt_dev_warn(bdev->hdev, "Tx fifo overflow");
591
d555b1f2 592 if (test_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state)) {
10fe40e1
MC		 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
26270bc1 603 if (int_status & RX_DONE_INT) {
184ea403
SW		 604 rx_size = sdio_readl(bdev->func, MTK_REG_CRPLR, NULL);
605 rx_size = (rx_size & RX_PKT_LEN) >> 16;
26270bc1
SW		 606 if (btmtksdio_rx_packet(bdev, rx_size) < 0)
607 bdev->hdev->stat.err_rx++;
608 }
26270bc1 609 } while (int_status || time_is_before_jiffies(txrx_timeout));
9aebfd4a 610
26270bc1 611 /* Enable interrupt */
4ed924fc 612 sdio_writel(bdev->func, C_INT_EN_SET, MTK_REG_CHLPCR, NULL);
9aebfd4a 613
26270bc1 614 sdio_release_host(bdev->func);
9aebfd4a 615
26270bc1
SW		 616 pm_runtime_mark_last_busy(bdev->dev);
617 pm_runtime_put_autosuspend(bdev->dev);
618}
9aebfd4a 619
26270bc1
SW		 620static void btmtksdio_interrupt(struct sdio_func *func)
621{
622 struct btmtksdio_dev *bdev = sdio_get_drvdata(func);
9aebfd4a 623
4ed924fc
ZJ		 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
26270bc1 630 /* Disable interrupt */
4ed924fc 631 sdio_writel(bdev->func, C_INT_EN_CLR, MTK_REG_CHLPCR, NULL);
7f3c563c 632
26270bc1 633 schedule_work(&bdev->txrx_work);
9aebfd4a
SW		 634}
635
636static int btmtksdio_open(struct hci_dev *hdev)
637{
638 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
c7e301d7 639 u32 val;
9aebfd4a 640 int err;
9aebfd4a
SW		 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
4b4b2228
SW		 648 set_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
649
c7e301d7 650 err = btmtksdio_drv_pmctrl(bdev);
9aebfd4a
SW		 651 if (err < 0)
652 goto err_disable_func;
653
9aebfd4a
SW		 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 */
5b23ac1a
SW		 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);
9aebfd4a
SW		 680 if (err < 0)
681 goto err_release_irq;
682
77b210d1
SW		 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);
9aebfd4a
SW		 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);
9aebfd4a
SW		 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
26270bc1
SW		 731 cancel_work_sync(&bdev->txrx_work);
732
c7e301d7 733 btmtksdio_fw_pmctrl(bdev);
9aebfd4a 734
4b4b2228 735 clear_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state);
9aebfd4a
SW		 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
26270bc1 749 cancel_work_sync(&bdev->txrx_work);
9aebfd4a
SW		 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 */
3a722044 761 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
9aebfd4a
SW		 762 wmt_params.flag = 4;
763 wmt_params.dlen = sizeof(param);
764 wmt_params.data = &param;
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
c603bf1f 776static int mt76xx_setup(struct hci_dev *hdev, const char *fwname)
9aebfd4a 777{
01ecc177 778 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
9aebfd4a 779 struct btmtk_hci_wmt_params wmt_params;
9aebfd4a 780 struct btmtk_tci_sleep tci_sleep;
9aebfd4a
SW		 781 struct sk_buff *skb;
782 int err, status;
783 u8 param = 0x1;
784
9aebfd4a 785 /* Query whether the firmware is already download */
3a722044 786 wmt_params.op = BTMTK_WMT_SEMAPHORE;
9aebfd4a
SW		 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 */
c603bf1f 804 err = btmtk_setup_firmware(hdev, fwname, mtk_hci_wmt_sync);
9aebfd4a
SW		 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 */
3a722044 827 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
9aebfd4a
SW		 828 wmt_params.flag = 0;
829 wmt_params.dlen = sizeof(param);
830 wmt_params.data = &param;
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
01ecc177
MC		 839 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
840
9aebfd4a
SW		 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
c603bf1f
SW		 858 return 0;
859}
860
861static int mt79xx_setup(struct hci_dev *hdev, const char *fwname)
862{
01ecc177 863 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
c603bf1f
SW		 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
74697205
SW		 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
c603bf1f
SW		 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 = &param;
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
630491ff 895 hci_set_msft_opcode(hdev, 0xFD30);
16ada83b 896 hci_set_aosp_capable(hdev);
01ecc177 897 set_bit(BTMTKSDIO_PATCH_ENABLED, &bdev->tx_state);
630491ff 898
c603bf1f
SW		 899 return err;
900}
901
4b685879 902static int btmtksdio_mtk_reg_read(struct hci_dev *hdev, u32 reg, u32 *val)
c603bf1f
SW		 903{
904 struct btmtk_hci_wmt_params wmt_params;
5677bcf6 905 struct reg_read_cmd reg_read = {
c603bf1f
SW		 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 = &reg_read;
917 wmt_params.status = &status;
918
919 err = mtk_hci_wmt_sync(hdev, &wmt_params);
920 if (err < 0) {
386f626a 921 bt_dev_err(hdev, "Failed to read reg (%d)", err);
c603bf1f
SW		 922 return err;
923 }
924
925 *val = status;
926
927 return err;
928}
929
191c8723
MC		 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 = &reg_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
d786105e
YY		 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
f41b91fa
YY		 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);
789f6b8a 980 if (!*ven_data) {
f41b91fa
YY		 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
191c8723
MC		 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;
d786105e
YY		 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;
f41b91fa 1048 hdev->get_codec_config_data = btmtksdio_get_codec_config_data;
d786105e
YY		 1049
1050 return err;
191c8723
MC		 1051}
1052
8fafe702
CYC		 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
c603bf1f
SW		 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;
8fafe702 1082 u32 fw_version = 0, val;
c603bf1f
SW		 1083
1084 calltime = ktime_get();
d555b1f2 1085 set_bit(BTMTKSDIO_HW_TX_READY, &bdev->tx_state);
c603bf1f
SW		 1086
1087 switch (bdev->data->chipid) {
1088 case 0x7921:
8fafe702
CYC		 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
4b685879 1108 err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id);
c603bf1f
SW		 1109 if (err < 0) {
1110 bt_dev_err(hdev, "Failed to get device id (%d)", err);
1111 return err;
1112 }
1113
4b685879 1114 err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version);
c603bf1f
SW		 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;
191c8723
MC		 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
5ad80cfc
YY		 1134 /* Enable WBS with mSBC codec */
1135 set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
1136
8fafe702
CYC		 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
546ff98e
YY		 1147 /* Valid LE States quirk for MediaTek 7921 */
1148 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
1149
c603bf1f
SW		 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
9aebfd4a
SW		 1161 rettime = ktime_get();
1162 delta = ktime_sub(rettime, calltime);
1163 duration = (unsigned long long)ktime_to_ns(delta) >> 10;
1164
7f3c563c
SW		 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
9aebfd4a
SW		 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{
7f3c563c 1189 struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
9aebfd4a
SW		 1190 struct btmtk_hci_wmt_params wmt_params;
1191 u8 param = 0x0;
1192 int err;
1193
7f3c563c
SW		 1194 /* Get back the state to be consistent with the state
1195 * in btmtksdio_setup.
1196 */
1197 pm_runtime_get_sync(bdev->dev);
1198
baabb7f5
SW		 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
9aebfd4a 1203 /* Disable the device */
3a722044 1204 wmt_params.op = BTMTK_WMT_FUNC_CTRL;
9aebfd4a
SW		 1205 wmt_params.flag = 0;
1206 wmt_params.dlen = sizeof(param);
1207 wmt_params.data = &param;
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
baabb7f5 1216ignore_wmt_cmd:
7f3c563c
SW		 1217 pm_runtime_put_noidle(bdev->dev);
1218 pm_runtime_disable(bdev->dev);
1219
9aebfd4a
SW		 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
26270bc1 1246 schedule_work(&bdev->txrx_work);
9aebfd4a
SW		 1247
1248 return 0;
1249}
1250
8fafe702
CYC		 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
df332800
SW		 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
ce64b3e9
MC		 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;
eb3f0517
YY		 1318 else
1319 kfree_skb(skb);
ce64b3e9
MC		 1320 }
1321
1322 return may_wakeup;
1323}
1324
9aebfd4a
SW		 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
7f3c563c 1340 bdev->dev = &func->dev;
9aebfd4a
SW		 1341 bdev->func = func;
1342
26270bc1 1343 INIT_WORK(&bdev->txrx_work, btmtksdio_txrx_work);
9aebfd4a
SW		 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;
8fafe702 1360 hdev->cmd_timeout = btmtksdio_cmd_timeout;
9aebfd4a
SW		 1361 hdev->flush = btmtksdio_flush;
1362 hdev->setup = btmtksdio_setup;
1363 hdev->shutdown = btmtksdio_shutdown;
1364 hdev->send = btmtksdio_send_frame;
ce64b3e9 1365 hdev->wakeup = btmtksdio_sdio_wakeup;
df332800
SW		 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;
877ec9e1
SW		 1374 hdev->set_bdaddr = btmtk_set_bdaddr;
1375
9aebfd4a
SW		 1376 SET_HCIDEV_DEV(hdev, &func->dev);
1377
1378 hdev->manufacturer = 70;
1379 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
1380
b062a0b9
YY		 1381 sdio_set_drvdata(func, bdev);
1382
9aebfd4a
SW		 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
7f3c563c
SW		 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
ce64b3e9
MC		 1409 err = device_init_wakeup(bdev->dev, true);
1410 if (err)
1411 bt_dev_err(hdev, "failed to initialize device wakeup");
1412
8fafe702
CYC		 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
ce64b3e9 1420 return err;
9aebfd4a
SW		 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
7f3c563c
SW		 1431 /* Be consistent the state in btmtksdio_probe */
1432 pm_runtime_get_noresume(bdev->dev);
1433
9aebfd4a
SW		 1434 hdev = bdev->hdev;
1435
1436 sdio_set_drvdata(func, NULL);
1437 hci_unregister_dev(hdev);
1438 hci_free_dev(hdev);
1439}
1440
7f3c563c
SW		 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;
7f3c563c
SW		 1446 int err;
1447
1448 bdev = sdio_get_drvdata(func);
1449 if (!bdev)
1450 return 0;
1451
4b4b2228
SW		 1452 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1453 return 0;
1454
561ae1d4
SW		 1455 sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1456
c7e301d7 1457 err = btmtksdio_fw_pmctrl(bdev);
7f3c563c 1458
095519de 1459 bt_dev_dbg(bdev->hdev, "status (%d) return ownership to device", err);
7f3c563c 1460
7f3c563c
SW		 1461 return err;
1462}
1463
4ed924fc
ZJ		 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
7f3c563c
SW		 1481static int btmtksdio_runtime_resume(struct device *dev)
1482{
1483 struct sdio_func *func = dev_to_sdio_func(dev);
1484 struct btmtksdio_dev *bdev;
7f3c563c
SW		 1485 int err;
1486
1487 bdev = sdio_get_drvdata(func);
1488 if (!bdev)
1489 return 0;
1490
4b4b2228
SW		 1491 if (!test_bit(BTMTKSDIO_FUNC_ENABLED, &bdev->tx_state))
1492 return 0;
1493
c7e301d7 1494 err = btmtksdio_drv_pmctrl(bdev);
7f3c563c 1495
095519de 1496 bt_dev_dbg(bdev->hdev, "status (%d) get ownership from device", err);
7f3c563c 1497
7f3c563c
SW		 1498 return err;
1499}
1500
4ed924fc
ZJ		 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
7f3c563c
SW		 1511#define BTMTKSDIO_PM_OPS (&btmtksdio_pm_ops)
1512#else /* CONFIG_PM */
1513#define BTMTKSDIO_PM_OPS NULL
1514#endif /* CONFIG_PM */
1515
9aebfd4a
SW		 1516static struct sdio_driver btmtksdio_driver = {
1517 .name = "btmtksdio",
1518 .probe = btmtksdio_probe,
1519 .remove = btmtksdio_remove,
1520 .id_table = btmtksdio_table,
7f3c563c
SW		 1521 .drv = {
1522 .owner = THIS_MODULE,
1523 .pm = BTMTKSDIO_PM_OPS,
1524 }
9aebfd4a
SW		 1525};
1526
a6094a46 1527module_sdio_driver(btmtksdio_driver);
9aebfd4a 1528
7f3c563c
SW		 1529module_param(enable_autosuspend, bool, 0644);
1530MODULE_PARM_DESC(enable_autosuspend, "Enable autosuspend by default");
1531
9aebfd4a
SW		 1532MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
1533MODULE_DESCRIPTION("MediaTek Bluetooth SDIO driver ver " VERSION);
1534MODULE_VERSION(VERSION);
1535MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)