1 // SPDX-License-Identifier: GPL-2.0
3 // Mediatek ALSA BT SCO CVSD/MSBC Driver
5 // Copyright (c) 2019 MediaTek Inc.
6 // Author: KaiChieh Chuang <kaichieh.chuang@mediatek.com>
8 #include <linux/mfd/syscon.h>
9 #include <linux/module.h>
10 #include <linux/of_address.h>
11 #include <linux/sched/clock.h>
13 #include <sound/soc.h>
15 #define BTCVSD_SND_NAME "mtk-btcvsd-snd"
17 #define BT_CVSD_TX_NREADY BIT(21)
18 #define BT_CVSD_RX_READY BIT(22)
19 #define BT_CVSD_TX_UNDERFLOW BIT(23)
20 #define BT_CVSD_RX_OVERFLOW BIT(24)
21 #define BT_CVSD_INTERRUPT BIT(31)
23 #define BT_CVSD_CLEAR \
24 (BT_CVSD_TX_NREADY | BT_CVSD_RX_READY | BT_CVSD_TX_UNDERFLOW |\
25 BT_CVSD_RX_OVERFLOW | BT_CVSD_INTERRUPT)
28 #define SCO_TX_ENCODE_SIZE (60)
29 /* 18 = 6 * 180 / SCO_TX_ENCODE_SIZE */
30 #define SCO_TX_PACKER_BUF_NUM (18)
33 #define SCO_RX_PLC_SIZE (30)
34 #define SCO_RX_PACKER_BUF_NUM (64)
35 #define SCO_RX_PACKET_MASK (0x3F)
37 #define SCO_CVSD_PACKET_VALID_SIZE 2
39 #define SCO_PACKET_120 120
40 #define SCO_PACKET_180 180
42 #define BTCVSD_RX_PACKET_SIZE (SCO_RX_PLC_SIZE + SCO_CVSD_PACKET_VALID_SIZE)
43 #define BTCVSD_TX_PACKET_SIZE (SCO_TX_ENCODE_SIZE)
45 #define BTCVSD_RX_BUF_SIZE (BTCVSD_RX_PACKET_SIZE * SCO_RX_PACKER_BUF_NUM)
46 #define BTCVSD_TX_BUF_SIZE (BTCVSD_TX_PACKET_SIZE * SCO_TX_PACKER_BUF_NUM)
52 BT_SCO_STATE_LOOPBACK,
60 enum bt_sco_packet_len {
75 struct mtk_btcvsd_snd_hw_info {
76 unsigned int num_valid_addr;
77 unsigned long bt_sram_addr[20];
78 unsigned int packet_length;
79 unsigned int packet_num;
82 struct mtk_btcvsd_snd_stream {
83 struct snd_pcm_substream *substream;
86 enum bt_sco_state state;
88 unsigned int packet_size;
89 unsigned int buf_size;
90 u8 temp_packet_buf[SCO_PACKET_180];
94 snd_pcm_uframes_t prev_frame;
98 unsigned int timeout:1;
100 unsigned int trigger_start:1;
101 unsigned int wait_flag:1;
104 unsigned long long time_stamp;
105 unsigned long long buf_data_equivalent_time;
107 struct mtk_btcvsd_snd_hw_info buffer_info;
110 struct mtk_btcvsd_snd {
114 struct regmap *infra;
115 void __iomem *bt_pkv_base;
116 void __iomem *bt_sram_bank2_base;
118 unsigned int infra_misc_offset;
119 unsigned int conn_bt_cvsd_mask;
120 unsigned int cvsd_mcu_read_offset;
121 unsigned int cvsd_mcu_write_offset;
122 unsigned int cvsd_packet_indicator;
128 unsigned int irq_disabled:1;
130 spinlock_t tx_lock; /* spinlock for bt tx stream control */
131 spinlock_t rx_lock; /* spinlock for bt rx stream control */
132 wait_queue_head_t tx_wait;
133 wait_queue_head_t rx_wait;
135 struct mtk_btcvsd_snd_stream *tx;
136 struct mtk_btcvsd_snd_stream *rx;
137 u8 tx_packet_buf[BTCVSD_TX_BUF_SIZE];
138 u8 rx_packet_buf[BTCVSD_RX_BUF_SIZE];
140 enum BT_SCO_BAND band;
143 struct mtk_btcvsd_snd_time_buffer_info {
144 unsigned long long data_count_equi_time;
145 unsigned long long time_stamp_us;
148 static const unsigned int btsco_packet_valid_mask[BT_SCO_CVSD_MAX][6] = {
149 {0x1, 0x1 << 1, 0x1 << 2, 0x1 << 3, 0x1 << 4, 0x1 << 5},
150 {0x1, 0x1, 0x2, 0x2, 0x4, 0x4},
151 {0x1, 0x1, 0x1, 0x2, 0x2, 0x2},
152 {0x1, 0x1, 0x1, 0x1, 0x0, 0x0},
153 {0x7, 0x7 << 3, 0x7 << 6, 0x7 << 9, 0x7 << 12, 0x7 << 15},
154 {0x3, 0x3 << 1, 0x3 << 3, 0x3 << 4, 0x3 << 6, 0x3 << 7},
157 static const unsigned int btsco_packet_info[BT_SCO_CVSD_MAX][4] = {
158 {30, 6, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
159 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
160 {60, 3, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
161 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
162 {90, 2, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
163 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
164 {120, 1, SCO_PACKET_120 / SCO_TX_ENCODE_SIZE,
165 SCO_PACKET_120 / SCO_RX_PLC_SIZE},
166 {10, 18, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
167 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
168 {20, 9, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
169 SCO_PACKET_180 / SCO_RX_PLC_SIZE},
172 static const u8 table_msbc_silence[SCO_PACKET_180] = {
173 0x01, 0x38, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
174 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
175 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
176 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
177 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
178 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00,
179 0x01, 0xc8, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
180 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
181 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
182 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
183 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
184 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00,
185 0x01, 0xf8, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
186 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
187 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
188 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
189 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
190 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00
193 static void mtk_btcvsd_snd_irq_enable(struct mtk_btcvsd_snd *bt)
195 regmap_update_bits(bt->infra, bt->infra_misc_offset,
196 bt->conn_bt_cvsd_mask, bt->conn_bt_cvsd_mask);
199 static void mtk_btcvsd_snd_irq_disable(struct mtk_btcvsd_snd *bt)
201 regmap_update_bits(bt->infra, bt->infra_misc_offset,
202 bt->conn_bt_cvsd_mask, 0);
205 static void mtk_btcvsd_snd_set_state(struct mtk_btcvsd_snd *bt,
206 struct mtk_btcvsd_snd_stream *bt_stream,
209 dev_dbg(bt->dev, "%s(), stream %d, state %d, tx->state %d, rx->state %d, irq_disabled %d\n",
211 bt_stream->stream, state,
212 bt->tx->state, bt->rx->state, bt->irq_disabled);
214 bt_stream->state = state;
216 if (bt->tx->state == BT_SCO_STATE_IDLE &&
217 bt->rx->state == BT_SCO_STATE_IDLE) {
218 if (!bt->irq_disabled) {
219 disable_irq(bt->irq_id);
220 mtk_btcvsd_snd_irq_disable(bt);
221 bt->irq_disabled = 1;
224 if (bt->irq_disabled) {
225 enable_irq(bt->irq_id);
226 mtk_btcvsd_snd_irq_enable(bt);
227 bt->irq_disabled = 0;
232 static int mtk_btcvsd_snd_tx_init(struct mtk_btcvsd_snd *bt)
234 memset(bt->tx, 0, sizeof(*bt->tx));
235 memset(bt->tx_packet_buf, 0, sizeof(bt->tx_packet_buf));
237 bt->tx->packet_size = BTCVSD_TX_PACKET_SIZE;
238 bt->tx->buf_size = BTCVSD_TX_BUF_SIZE;
241 bt->tx->stream = SNDRV_PCM_STREAM_PLAYBACK;
245 static int mtk_btcvsd_snd_rx_init(struct mtk_btcvsd_snd *bt)
247 memset(bt->rx, 0, sizeof(*bt->rx));
248 memset(bt->rx_packet_buf, 0, sizeof(bt->rx_packet_buf));
250 bt->rx->packet_size = BTCVSD_RX_PACKET_SIZE;
251 bt->rx->buf_size = BTCVSD_RX_BUF_SIZE;
254 bt->rx->stream = SNDRV_PCM_STREAM_CAPTURE;
258 static void get_tx_time_stamp(struct mtk_btcvsd_snd *bt,
259 struct mtk_btcvsd_snd_time_buffer_info *ts)
261 ts->time_stamp_us = bt->tx->time_stamp;
262 ts->data_count_equi_time = bt->tx->buf_data_equivalent_time;
265 static void get_rx_time_stamp(struct mtk_btcvsd_snd *bt,
266 struct mtk_btcvsd_snd_time_buffer_info *ts)
268 ts->time_stamp_us = bt->rx->time_stamp;
269 ts->data_count_equi_time = bt->rx->buf_data_equivalent_time;
272 static int btcvsd_bytes_to_frame(struct snd_pcm_substream *substream,
276 struct snd_pcm_runtime *runtime = substream->runtime;
278 if (runtime->format == SNDRV_PCM_FORMAT_S32_LE ||
279 runtime->format == SNDRV_PCM_FORMAT_U32_LE)
284 count = count / runtime->channels;
288 static void mtk_btcvsd_snd_data_transfer(enum bt_sco_direct dir,
290 unsigned int blk_size,
291 unsigned int blk_num)
295 if (blk_size == 60 || blk_size == 120 || blk_size == 20) {
296 u32 *src_32 = (u32 *)src;
297 u32 *dst_32 = (u32 *)dst;
299 for (i = 0; i < (blk_size * blk_num / 4); i++)
300 *dst_32++ = *src_32++;
302 u16 *src_16 = (u16 *)src;
303 u16 *dst_16 = (u16 *)dst;
305 for (j = 0; j < blk_num; j++) {
306 for (i = 0; i < (blk_size / 2); i++)
307 *dst_16++ = *src_16++;
309 if (dir == BT_SCO_DIRECT_BT2ARM)
317 /* write encoded mute data to bt sram */
318 static int btcvsd_tx_clean_buffer(struct mtk_btcvsd_snd *bt)
321 unsigned int num_valid_addr;
323 enum BT_SCO_BAND band = bt->band;
325 /* prepare encoded mute data */
326 if (band == BT_SCO_NB)
327 memset(bt->tx->temp_packet_buf, 170, SCO_PACKET_180);
329 memcpy(bt->tx->temp_packet_buf,
330 table_msbc_silence, SCO_PACKET_180);
332 /* write mute data to bt tx sram buffer */
333 spin_lock_irqsave(&bt->tx_lock, flags);
334 num_valid_addr = bt->tx->buffer_info.num_valid_addr;
336 dev_info(bt->dev, "%s(), band %d, num_valid_addr %u\n",
337 __func__, band, num_valid_addr);
339 for (i = 0; i < num_valid_addr; i++) {
342 dev_info(bt->dev, "%s(), clean addr 0x%lx\n", __func__,
343 bt->tx->buffer_info.bt_sram_addr[i]);
345 dst = (void *)bt->tx->buffer_info.bt_sram_addr[i];
347 mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
348 bt->tx->temp_packet_buf, dst,
349 bt->tx->buffer_info.packet_length,
350 bt->tx->buffer_info.packet_num);
352 spin_unlock_irqrestore(&bt->tx_lock, flags);
357 static int mtk_btcvsd_read_from_bt(struct mtk_btcvsd_snd *bt,
358 enum bt_sco_packet_len packet_type,
359 unsigned int packet_length,
360 unsigned int packet_num,
361 unsigned int blk_size,
362 unsigned int control)
367 unsigned int packet_buf_ofs;
369 unsigned long connsys_addr_rx, ap_addr_rx;
371 connsys_addr_rx = *bt->bt_reg_pkt_r;
372 ap_addr_rx = (unsigned long)bt->bt_sram_bank2_base +
373 (connsys_addr_rx & 0xFFFF);
375 if (connsys_addr_rx == 0xdeadfeed) {
376 /* bt return 0xdeadfeed if read register during bt sleep */
377 dev_warn(bt->dev, "%s(), connsys_addr_rx == 0xdeadfeed",
382 src = (u8 *)ap_addr_rx;
384 mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_BT2ARM, src,
385 bt->rx->temp_packet_buf, packet_length,
388 spin_lock_irqsave(&bt->rx_lock, flags);
389 for (i = 0; i < blk_size; i++) {
390 packet_buf_ofs = (bt->rx->packet_w & SCO_RX_PACKET_MASK) *
392 memcpy(bt->rx_packet_buf + packet_buf_ofs,
393 bt->rx->temp_packet_buf + (SCO_RX_PLC_SIZE * i),
395 if ((control & btsco_packet_valid_mask[packet_type][i]) ==
396 btsco_packet_valid_mask[packet_type][i])
401 packet_buf_ofs += SCO_RX_PLC_SIZE;
402 memcpy(bt->rx_packet_buf + packet_buf_ofs, (void *)&pv,
403 SCO_CVSD_PACKET_VALID_SIZE);
406 spin_unlock_irqrestore(&bt->rx_lock, flags);
410 int mtk_btcvsd_write_to_bt(struct mtk_btcvsd_snd *bt,
411 enum bt_sco_packet_len packet_type,
412 unsigned int packet_length,
413 unsigned int packet_num,
414 unsigned int blk_size)
419 unsigned long connsys_addr_tx, ap_addr_tx;
420 bool new_ap_addr_tx = true;
422 connsys_addr_tx = *bt->bt_reg_pkt_w;
423 ap_addr_tx = (unsigned long)bt->bt_sram_bank2_base +
424 (connsys_addr_tx & 0xFFFF);
426 if (connsys_addr_tx == 0xdeadfeed) {
427 /* bt return 0xdeadfeed if read register during bt sleep */
428 dev_warn(bt->dev, "%s(), connsys_addr_tx == 0xdeadfeed\n",
433 spin_lock_irqsave(&bt->tx_lock, flags);
434 for (i = 0; i < blk_size; i++) {
435 memcpy(bt->tx->temp_packet_buf + (bt->tx->packet_size * i),
437 (bt->tx->packet_r % SCO_TX_PACKER_BUF_NUM) *
438 bt->tx->packet_size),
439 bt->tx->packet_size);
443 spin_unlock_irqrestore(&bt->tx_lock, flags);
445 dst = (u8 *)ap_addr_tx;
448 mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
449 bt->tx->temp_packet_buf, dst,
450 packet_length, packet_num);
453 /* store bt tx buffer sram info */
454 bt->tx->buffer_info.packet_length = packet_length;
455 bt->tx->buffer_info.packet_num = packet_num;
456 for (i = 0; i < bt->tx->buffer_info.num_valid_addr; i++) {
457 if (bt->tx->buffer_info.bt_sram_addr[i] == ap_addr_tx) {
458 new_ap_addr_tx = false;
462 if (new_ap_addr_tx) {
463 unsigned int next_idx;
465 spin_lock_irqsave(&bt->tx_lock, flags);
466 bt->tx->buffer_info.num_valid_addr++;
467 next_idx = bt->tx->buffer_info.num_valid_addr - 1;
468 bt->tx->buffer_info.bt_sram_addr[next_idx] = ap_addr_tx;
469 spin_unlock_irqrestore(&bt->tx_lock, flags);
470 dev_info(bt->dev, "%s(), new ap_addr_tx = 0x%lx, num_valid_addr %d\n",
471 __func__, ap_addr_tx,
472 bt->tx->buffer_info.num_valid_addr);
476 btcvsd_tx_clean_buffer(bt);
481 static irqreturn_t mtk_btcvsd_snd_irq_handler(int irq_id, void *dev)
483 struct mtk_btcvsd_snd *bt = dev;
484 unsigned int packet_type, packet_num, packet_length;
485 unsigned int buf_cnt_tx, buf_cnt_rx, control;
487 if (bt->rx->state != BT_SCO_STATE_RUNNING &&
488 bt->rx->state != BT_SCO_STATE_ENDING &&
489 bt->tx->state != BT_SCO_STATE_RUNNING &&
490 bt->tx->state != BT_SCO_STATE_ENDING &&
491 bt->tx->state != BT_SCO_STATE_LOOPBACK) {
492 dev_warn(bt->dev, "%s(), in idle state: rx->state: %d, tx->state: %d\n",
493 __func__, bt->rx->state, bt->tx->state);
494 goto irq_handler_exit;
497 control = *bt->bt_reg_ctl;
498 packet_type = (control >> 18) & 0x7;
500 if (((control >> 31) & 1) == 0) {
501 dev_warn(bt->dev, "%s(), ((control >> 31) & 1) == 0, control 0x%x\n",
503 goto irq_handler_exit;
506 if (packet_type >= BT_SCO_CVSD_MAX) {
507 dev_warn(bt->dev, "%s(), invalid packet_type %u, exit\n",
508 __func__, packet_type);
509 goto irq_handler_exit;
512 packet_length = btsco_packet_info[packet_type][0];
513 packet_num = btsco_packet_info[packet_type][1];
514 buf_cnt_tx = btsco_packet_info[packet_type][2];
515 buf_cnt_rx = btsco_packet_info[packet_type][3];
517 if (bt->tx->state == BT_SCO_STATE_LOOPBACK) {
519 unsigned long connsys_addr_rx, ap_addr_rx;
520 unsigned long connsys_addr_tx, ap_addr_tx;
522 connsys_addr_rx = *bt->bt_reg_pkt_r;
523 ap_addr_rx = (unsigned long)bt->bt_sram_bank2_base +
524 (connsys_addr_rx & 0xFFFF);
526 connsys_addr_tx = *bt->bt_reg_pkt_w;
527 ap_addr_tx = (unsigned long)bt->bt_sram_bank2_base +
528 (connsys_addr_tx & 0xFFFF);
530 if (connsys_addr_tx == 0xdeadfeed ||
531 connsys_addr_rx == 0xdeadfeed) {
532 /* bt return 0xdeadfeed if read reg during bt sleep */
533 dev_warn(bt->dev, "%s(), connsys_addr_tx == 0xdeadfeed\n",
535 goto irq_handler_exit;
538 src = (u8 *)ap_addr_rx;
539 dst = (u8 *)ap_addr_tx;
541 mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_BT2ARM, src,
542 bt->tx->temp_packet_buf,
545 mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
546 bt->tx->temp_packet_buf, dst,
553 if (bt->rx->state == BT_SCO_STATE_RUNNING ||
554 bt->rx->state == BT_SCO_STATE_ENDING) {
556 if (bt->rx->packet_w - bt->rx->packet_r <=
557 SCO_RX_PACKER_BUF_NUM - 2 * buf_cnt_rx) {
559 * free space is larger then
560 * twice interrupt rx data size
563 dev_warn(bt->dev, "%s(), rx->xrun 0!\n",
569 (bt->rx->packet_w - bt->rx->packet_r <=
570 SCO_RX_PACKER_BUF_NUM - buf_cnt_rx)) {
571 mtk_btcvsd_read_from_bt(bt,
580 dev_warn(bt->dev, "%s(), rx->xrun 1\n", __func__);
586 if ((bt->tx->state == BT_SCO_STATE_RUNNING ||
587 bt->tx->state == BT_SCO_STATE_ENDING) &&
588 bt->tx->trigger_start) {
590 /* prepared data is larger then twice
591 * interrupt tx data size
593 if (bt->tx->packet_w - bt->tx->packet_r >=
596 dev_warn(bt->dev, "%s(), tx->xrun 0\n",
601 if ((!bt->tx->xrun &&
602 (bt->tx->packet_w - bt->tx->packet_r >= buf_cnt_tx)) ||
603 bt->tx->state == BT_SCO_STATE_ENDING) {
604 mtk_btcvsd_write_to_bt(bt,
612 dev_warn(bt->dev, "%s(), tx->xrun 1\n", __func__);
616 *bt->bt_reg_ctl &= ~BT_CVSD_CLEAR;
618 if (bt->rx->state == BT_SCO_STATE_RUNNING ||
619 bt->rx->state == BT_SCO_STATE_ENDING) {
620 bt->rx->wait_flag = 1;
621 wake_up_interruptible(&bt->rx_wait);
622 snd_pcm_period_elapsed(bt->rx->substream);
624 if (bt->tx->state == BT_SCO_STATE_RUNNING ||
625 bt->tx->state == BT_SCO_STATE_ENDING) {
626 bt->tx->wait_flag = 1;
627 wake_up_interruptible(&bt->tx_wait);
628 snd_pcm_period_elapsed(bt->tx->substream);
633 *bt->bt_reg_ctl &= ~BT_CVSD_CLEAR;
637 static int wait_for_bt_irq(struct mtk_btcvsd_snd *bt,
638 struct mtk_btcvsd_snd_stream *bt_stream)
640 unsigned long long t1, t2;
641 /* one interrupt period = 22.5ms */
642 unsigned long long timeout_limit = 22500000;
643 int max_timeout_trial = 2;
646 bt_stream->wait_flag = 0;
648 while (max_timeout_trial && !bt_stream->wait_flag) {
650 if (bt_stream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
651 ret = wait_event_interruptible_timeout(bt->tx_wait,
652 bt_stream->wait_flag,
653 nsecs_to_jiffies(timeout_limit));
655 ret = wait_event_interruptible_timeout(bt->rx_wait,
656 bt_stream->wait_flag,
657 nsecs_to_jiffies(timeout_limit));
661 t2 = t2 - t1; /* in ns (10^9) */
663 if (t2 > timeout_limit) {
664 dev_warn(bt->dev, "%s(), stream %d, timeout %llu, limit %llu, ret %d, flag %d\n",
665 __func__, bt_stream->stream,
666 t2, timeout_limit, ret,
667 bt_stream->wait_flag);
672 * error, -ERESTARTSYS if it was interrupted by
675 dev_warn(bt->dev, "%s(), stream %d, error, trial left %d\n",
677 bt_stream->stream, max_timeout_trial);
679 bt_stream->timeout = 1;
681 } else if (ret == 0) {
682 /* conidtion is false after timeout */
684 dev_warn(bt->dev, "%s(), stream %d, error, timeout, condition is false, trial left %d\n",
686 bt_stream->stream, max_timeout_trial);
688 if (max_timeout_trial <= 0) {
689 bt_stream->timeout = 1;
698 ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt,
702 ssize_t read_size = 0, read_count = 0, cur_read_idx, cont;
703 unsigned int cur_buf_ofs = 0;
706 unsigned int packet_size = bt->rx->packet_size;
709 spin_lock_irqsave(&bt->rx_lock, flags);
710 /* available data in RX packet buffer */
711 avail = (bt->rx->packet_w - bt->rx->packet_r) * packet_size;
713 cur_read_idx = (bt->rx->packet_r & SCO_RX_PACKET_MASK) *
715 spin_unlock_irqrestore(&bt->rx_lock, flags);
718 int ret = wait_for_bt_irq(bt, bt->rx);
726 /* count must be multiple of packet_size */
727 if (count % packet_size != 0 ||
728 avail % packet_size != 0) {
729 dev_warn(bt->dev, "%s(), count %zu or d %lu is not multiple of packet_size %dd\n",
730 __func__, count, avail, packet_size);
732 count -= count % packet_size;
733 avail -= avail % packet_size;
741 /* calculate continue space */
742 cont = bt->rx->buf_size - cur_read_idx;
743 if (read_size > cont)
746 if (copy_to_user(buf + cur_buf_ofs,
747 bt->rx_packet_buf + cur_read_idx,
749 dev_warn(bt->dev, "%s(), copy_to_user fail\n",
754 spin_lock_irqsave(&bt->rx_lock, flags);
755 bt->rx->packet_r += read_size / packet_size;
756 spin_unlock_irqrestore(&bt->rx_lock, flags);
758 read_count += read_size;
759 cur_buf_ofs += read_size;
764 * save current timestamp & buffer time in times_tamp and
765 * buf_data_equivalent_time
767 bt->rx->time_stamp = sched_clock();
768 bt->rx->buf_data_equivalent_time =
769 (unsigned long long)(bt->rx->packet_w - bt->rx->packet_r) *
770 SCO_RX_PLC_SIZE * 16 * 1000 / 2 / 64;
771 bt->rx->buf_data_equivalent_time += read_count * SCO_RX_PLC_SIZE *
772 16 * 1000 / packet_size / 2 / 64;
773 /* return equivalent time(us) to data count */
774 bt->rx->buf_data_equivalent_time *= 1000;
779 ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt,
783 int written_size = count, avail = 0, cur_write_idx, write_size, cont;
784 unsigned int cur_buf_ofs = 0;
786 unsigned int packet_size = bt->tx->packet_size;
789 * save current timestamp & buffer time in time_stamp and
790 * buf_data_equivalent_time
792 bt->tx->time_stamp = sched_clock();
793 bt->tx->buf_data_equivalent_time =
794 (unsigned long long)(bt->tx->packet_w - bt->tx->packet_r) *
795 packet_size * 16 * 1000 / 2 / 64;
797 /* return equivalent time(us) to data count */
798 bt->tx->buf_data_equivalent_time *= 1000;
801 spin_lock_irqsave(&bt->tx_lock, flags);
802 /* free space of TX packet buffer */
803 avail = bt->tx->buf_size -
804 (bt->tx->packet_w - bt->tx->packet_r) * packet_size;
806 cur_write_idx = (bt->tx->packet_w % SCO_TX_PACKER_BUF_NUM) *
808 spin_unlock_irqrestore(&bt->tx_lock, flags);
811 int ret = wait_for_bt_irq(bt, bt->rx);
819 /* count must be multiple of bt->tx->packet_size */
820 if (count % packet_size != 0 ||
821 avail % packet_size != 0) {
822 dev_warn(bt->dev, "%s(), count %zu or avail %d is not multiple of packet_size %d\n",
823 __func__, count, avail, packet_size);
824 count -= count % packet_size;
825 avail -= avail % packet_size;
833 /* calculate continue space */
834 cont = bt->tx->buf_size - cur_write_idx;
835 if (write_size > cont)
838 if (copy_from_user(bt->tx_packet_buf +
842 dev_warn(bt->dev, "%s(), copy_from_user fail\n",
847 spin_lock_irqsave(&bt->tx_lock, flags);
848 bt->tx->packet_w += write_size / packet_size;
849 spin_unlock_irqrestore(&bt->tx_lock, flags);
850 cur_buf_ofs += write_size;
857 static struct mtk_btcvsd_snd_stream *get_bt_stream
858 (struct mtk_btcvsd_snd *bt, struct snd_pcm_substream *substream)
860 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
867 static const struct snd_pcm_hardware mtk_btcvsd_hardware = {
868 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
869 SNDRV_PCM_INFO_RESUME),
870 .formats = SNDRV_PCM_FMTBIT_S16_LE,
871 .buffer_bytes_max = 24 * 1024,
872 .period_bytes_max = 24 * 1024,
878 static int mtk_pcm_btcvsd_open(struct snd_pcm_substream *substream)
880 struct snd_soc_pcm_runtime *rtd = substream->private_data;
881 struct snd_soc_component *component =
882 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
883 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
886 dev_dbg(bt->dev, "%s(), stream %d, substream %p\n",
887 __func__, substream->stream, substream);
889 snd_soc_set_runtime_hwparams(substream, &mtk_btcvsd_hardware);
891 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
892 ret = mtk_btcvsd_snd_tx_init(bt);
893 bt->tx->substream = substream;
895 ret = mtk_btcvsd_snd_rx_init(bt);
896 bt->rx->substream = substream;
902 static int mtk_pcm_btcvsd_close(struct snd_pcm_substream *substream)
904 struct snd_soc_pcm_runtime *rtd = substream->private_data;
905 struct snd_soc_component *component =
906 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
907 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
908 struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
910 dev_dbg(bt->dev, "%s(), stream %d\n", __func__, substream->stream);
912 mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_IDLE);
913 bt_stream->substream = NULL;
917 static int mtk_pcm_btcvsd_hw_params(struct snd_pcm_substream *substream,
918 struct snd_pcm_hw_params *hw_params)
920 struct snd_soc_pcm_runtime *rtd = substream->private_data;
921 struct snd_soc_component *component =
922 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
923 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
925 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
926 params_buffer_bytes(hw_params) % bt->tx->packet_size != 0) {
927 dev_warn(bt->dev, "%s(), error, buffer size %d not valid\n",
929 params_buffer_bytes(hw_params));
933 substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
937 static int mtk_pcm_btcvsd_hw_free(struct snd_pcm_substream *substream)
939 struct snd_soc_pcm_runtime *rtd = substream->private_data;
940 struct snd_soc_component *component =
941 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
942 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
944 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
945 btcvsd_tx_clean_buffer(bt);
950 static int mtk_pcm_btcvsd_prepare(struct snd_pcm_substream *substream)
952 struct snd_soc_pcm_runtime *rtd = substream->private_data;
953 struct snd_soc_component *component =
954 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
955 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
956 struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
958 dev_dbg(bt->dev, "%s(), stream %d\n", __func__, substream->stream);
960 mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_RUNNING);
964 static int mtk_pcm_btcvsd_trigger(struct snd_pcm_substream *substream, int cmd)
966 struct snd_soc_pcm_runtime *rtd = substream->private_data;
967 struct snd_soc_component *component =
968 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
969 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
970 struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
971 int stream = substream->stream;
974 dev_dbg(bt->dev, "%s(), stream %d, cmd %d\n",
975 __func__, substream->stream, cmd);
978 case SNDRV_PCM_TRIGGER_START:
979 case SNDRV_PCM_TRIGGER_RESUME:
980 hw_packet_ptr = stream == SNDRV_PCM_STREAM_PLAYBACK ?
981 bt_stream->packet_r : bt_stream->packet_w;
982 bt_stream->prev_packet_idx = hw_packet_ptr;
983 bt_stream->prev_frame = 0;
984 bt_stream->trigger_start = 1;
986 case SNDRV_PCM_TRIGGER_STOP:
987 case SNDRV_PCM_TRIGGER_SUSPEND:
988 bt_stream->trigger_start = 0;
989 mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_ENDING);
996 static snd_pcm_uframes_t mtk_pcm_btcvsd_pointer
997 (struct snd_pcm_substream *substream)
999 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1000 struct snd_soc_component *component =
1001 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
1002 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
1003 struct mtk_btcvsd_snd_stream *bt_stream;
1004 snd_pcm_uframes_t frame = 0;
1008 spinlock_t *lock; /* spinlock for bt stream control */
1009 unsigned long flags;
1011 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1012 lock = &bt->tx_lock;
1015 lock = &bt->rx_lock;
1019 spin_lock_irqsave(lock, flags);
1020 hw_packet_ptr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
1021 bt->tx->packet_r : bt->rx->packet_w;
1023 /* get packet diff from last time */
1024 if (hw_packet_ptr >= bt_stream->prev_packet_idx) {
1025 packet_diff = hw_packet_ptr - bt_stream->prev_packet_idx;
1027 /* integer overflow */
1028 packet_diff = (INT_MAX - bt_stream->prev_packet_idx) +
1029 (hw_packet_ptr - INT_MIN) + 1;
1031 bt_stream->prev_packet_idx = hw_packet_ptr;
1033 /* increased bytes */
1034 byte = packet_diff * bt_stream->packet_size;
1036 frame = btcvsd_bytes_to_frame(substream, byte);
1037 frame += bt_stream->prev_frame;
1038 frame %= substream->runtime->buffer_size;
1040 bt_stream->prev_frame = frame;
1042 spin_unlock_irqrestore(lock, flags);
1047 static int mtk_pcm_btcvsd_copy(struct snd_pcm_substream *substream,
1048 int channel, unsigned long pos,
1049 void __user *buf, unsigned long count)
1051 struct snd_soc_pcm_runtime *rtd = substream->private_data;
1052 struct snd_soc_component *component =
1053 snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME);
1054 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
1056 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1057 mtk_btcvsd_snd_write(bt, buf, count);
1059 mtk_btcvsd_snd_read(bt, buf, count);
1064 static struct snd_pcm_ops mtk_btcvsd_ops = {
1065 .open = mtk_pcm_btcvsd_open,
1066 .close = mtk_pcm_btcvsd_close,
1067 .ioctl = snd_pcm_lib_ioctl,
1068 .hw_params = mtk_pcm_btcvsd_hw_params,
1069 .hw_free = mtk_pcm_btcvsd_hw_free,
1070 .prepare = mtk_pcm_btcvsd_prepare,
1071 .trigger = mtk_pcm_btcvsd_trigger,
1072 .pointer = mtk_pcm_btcvsd_pointer,
1073 .copy_user = mtk_pcm_btcvsd_copy,
1077 static const char *const btsco_band_str[] = {"NB", "WB"};
1079 static const struct soc_enum btcvsd_enum[] = {
1080 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(btsco_band_str), btsco_band_str),
1083 static int btcvsd_band_get(struct snd_kcontrol *kcontrol,
1084 struct snd_ctl_elem_value *ucontrol)
1086 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1087 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1089 ucontrol->value.integer.value[0] = bt->band;
1093 static int btcvsd_band_set(struct snd_kcontrol *kcontrol,
1094 struct snd_ctl_elem_value *ucontrol)
1096 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1097 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1098 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1100 if (ucontrol->value.enumerated.item[0] >= e->items)
1103 bt->band = ucontrol->value.integer.value[0];
1104 dev_dbg(bt->dev, "%s(), band %d\n", __func__, bt->band);
1108 static int btcvsd_loopback_get(struct snd_kcontrol *kcontrol,
1109 struct snd_ctl_elem_value *ucontrol)
1111 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1112 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1113 bool lpbk_en = bt->tx->state == BT_SCO_STATE_LOOPBACK;
1115 ucontrol->value.integer.value[0] = lpbk_en;
1119 static int btcvsd_loopback_set(struct snd_kcontrol *kcontrol,
1120 struct snd_ctl_elem_value *ucontrol)
1122 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1123 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1125 if (ucontrol->value.integer.value[0]) {
1126 mtk_btcvsd_snd_set_state(bt, bt->tx, BT_SCO_STATE_LOOPBACK);
1127 mtk_btcvsd_snd_set_state(bt, bt->rx, BT_SCO_STATE_LOOPBACK);
1129 mtk_btcvsd_snd_set_state(bt, bt->tx, BT_SCO_STATE_RUNNING);
1130 mtk_btcvsd_snd_set_state(bt, bt->rx, BT_SCO_STATE_RUNNING);
1135 static int btcvsd_tx_mute_get(struct snd_kcontrol *kcontrol,
1136 struct snd_ctl_elem_value *ucontrol)
1138 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1139 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1142 ucontrol->value.integer.value[0] = 0;
1146 ucontrol->value.integer.value[0] = bt->tx->mute;
1150 static int btcvsd_tx_mute_set(struct snd_kcontrol *kcontrol,
1151 struct snd_ctl_elem_value *ucontrol)
1153 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1154 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1159 bt->tx->mute = ucontrol->value.integer.value[0];
1163 static int btcvsd_rx_irq_received_get(struct snd_kcontrol *kcontrol,
1164 struct snd_ctl_elem_value *ucontrol)
1166 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1167 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1172 ucontrol->value.integer.value[0] = bt->rx->rw_cnt ? 1 : 0;
1176 static int btcvsd_rx_timeout_get(struct snd_kcontrol *kcontrol,
1177 struct snd_ctl_elem_value *ucontrol)
1179 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1180 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1185 ucontrol->value.integer.value[0] = bt->rx->timeout;
1186 bt->rx->timeout = 0;
1190 static int btcvsd_rx_timestamp_get(struct snd_kcontrol *kcontrol,
1191 unsigned int __user *data, unsigned int size)
1193 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1194 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1196 struct mtk_btcvsd_snd_time_buffer_info time_buffer_info_rx;
1198 if (size > sizeof(struct mtk_btcvsd_snd_time_buffer_info))
1201 get_rx_time_stamp(bt, &time_buffer_info_rx);
1203 dev_dbg(bt->dev, "%s(), time_stamp_us %llu, data_count_equi_time %llu",
1205 time_buffer_info_rx.time_stamp_us,
1206 time_buffer_info_rx.data_count_equi_time);
1208 if (copy_to_user(data, &time_buffer_info_rx,
1209 sizeof(struct mtk_btcvsd_snd_time_buffer_info))) {
1210 dev_warn(bt->dev, "%s(), copy_to_user fail", __func__);
1217 static int btcvsd_tx_irq_received_get(struct snd_kcontrol *kcontrol,
1218 struct snd_ctl_elem_value *ucontrol)
1220 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1221 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1226 ucontrol->value.integer.value[0] = bt->tx->rw_cnt ? 1 : 0;
1230 static int btcvsd_tx_timeout_get(struct snd_kcontrol *kcontrol,
1231 struct snd_ctl_elem_value *ucontrol)
1233 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1234 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1236 ucontrol->value.integer.value[0] = bt->tx->timeout;
1240 static int btcvsd_tx_timestamp_get(struct snd_kcontrol *kcontrol,
1241 unsigned int __user *data, unsigned int size)
1243 struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
1244 struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
1246 struct mtk_btcvsd_snd_time_buffer_info time_buffer_info_tx;
1248 if (size > sizeof(struct mtk_btcvsd_snd_time_buffer_info))
1251 get_tx_time_stamp(bt, &time_buffer_info_tx);
1253 dev_dbg(bt->dev, "%s(), time_stamp_us %llu, data_count_equi_time %llu",
1255 time_buffer_info_tx.time_stamp_us,
1256 time_buffer_info_tx.data_count_equi_time);
1258 if (copy_to_user(data, &time_buffer_info_tx,
1259 sizeof(struct mtk_btcvsd_snd_time_buffer_info))) {
1260 dev_warn(bt->dev, "%s(), copy_to_user fail", __func__);
1267 static const struct snd_kcontrol_new mtk_btcvsd_snd_controls[] = {
1268 SOC_ENUM_EXT("BTCVSD Band", btcvsd_enum[0],
1269 btcvsd_band_get, btcvsd_band_set),
1270 SOC_SINGLE_BOOL_EXT("BTCVSD Loopback Switch", 0,
1271 btcvsd_loopback_get, btcvsd_loopback_set),
1272 SOC_SINGLE_BOOL_EXT("BTCVSD Tx Mute Switch", 0,
1273 btcvsd_tx_mute_get, btcvsd_tx_mute_set),
1274 SOC_SINGLE_BOOL_EXT("BTCVSD Tx Irq Received Switch", 0,
1275 btcvsd_tx_irq_received_get, NULL),
1276 SOC_SINGLE_BOOL_EXT("BTCVSD Tx Timeout Switch", 0,
1277 btcvsd_tx_timeout_get, NULL),
1278 SOC_SINGLE_BOOL_EXT("BTCVSD Rx Irq Received Switch", 0,
1279 btcvsd_rx_irq_received_get, NULL),
1280 SOC_SINGLE_BOOL_EXT("BTCVSD Rx Timeout Switch", 0,
1281 btcvsd_rx_timeout_get, NULL),
1282 SND_SOC_BYTES_TLV("BTCVSD Rx Timestamp",
1283 sizeof(struct mtk_btcvsd_snd_time_buffer_info),
1284 btcvsd_rx_timestamp_get, NULL),
1285 SND_SOC_BYTES_TLV("BTCVSD Tx Timestamp",
1286 sizeof(struct mtk_btcvsd_snd_time_buffer_info),
1287 btcvsd_tx_timestamp_get, NULL),
1290 static int mtk_btcvsd_snd_component_probe(struct snd_soc_component *component)
1292 return snd_soc_add_component_controls(component,
1293 mtk_btcvsd_snd_controls,
1294 ARRAY_SIZE(mtk_btcvsd_snd_controls));
1297 static const struct snd_soc_component_driver mtk_btcvsd_snd_platform = {
1298 .name = BTCVSD_SND_NAME,
1299 .ops = &mtk_btcvsd_ops,
1300 .probe = mtk_btcvsd_snd_component_probe,
1303 static int mtk_btcvsd_snd_probe(struct platform_device *pdev)
1307 u32 offset[5] = {0, 0, 0, 0, 0};
1308 struct mtk_btcvsd_snd *btcvsd;
1309 struct device *dev = &pdev->dev;
1311 /* init btcvsd private data */
1312 btcvsd = devm_kzalloc(dev, sizeof(*btcvsd), GFP_KERNEL);
1315 platform_set_drvdata(pdev, btcvsd);
1319 btcvsd->rx = devm_kzalloc(btcvsd->dev, sizeof(*btcvsd->rx), GFP_KERNEL);
1323 btcvsd->tx = devm_kzalloc(btcvsd->dev, sizeof(*btcvsd->tx), GFP_KERNEL);
1327 spin_lock_init(&btcvsd->tx_lock);
1328 spin_lock_init(&btcvsd->rx_lock);
1330 init_waitqueue_head(&btcvsd->tx_wait);
1331 init_waitqueue_head(&btcvsd->rx_wait);
1333 mtk_btcvsd_snd_tx_init(btcvsd);
1334 mtk_btcvsd_snd_rx_init(btcvsd);
1337 irq_id = platform_get_irq(pdev, 0);
1339 dev_err(dev, "%pOFn no irq found\n", dev->of_node);
1340 return irq_id < 0 ? irq_id : -ENXIO;
1343 ret = devm_request_irq(dev, irq_id, mtk_btcvsd_snd_irq_handler,
1344 IRQF_TRIGGER_LOW, "BTCVSD_ISR_Handle",
1347 dev_err(dev, "could not request_irq for BTCVSD_ISR_Handle\n");
1351 btcvsd->irq_id = irq_id;
1354 btcvsd->bt_pkv_base = of_iomap(dev->of_node, 0);
1355 if (!btcvsd->bt_pkv_base) {
1356 dev_err(dev, "iomap bt_pkv_base fail\n");
1360 btcvsd->bt_sram_bank2_base = of_iomap(dev->of_node, 1);
1361 if (!btcvsd->bt_sram_bank2_base) {
1362 dev_err(dev, "iomap bt_sram_bank2_base fail\n");
1366 btcvsd->infra = syscon_regmap_lookup_by_phandle(dev->of_node,
1367 "mediatek,infracfg");
1368 if (IS_ERR(btcvsd->infra)) {
1369 dev_err(dev, "cannot find infra controller: %ld\n",
1370 PTR_ERR(btcvsd->infra));
1371 return PTR_ERR(btcvsd->infra);
1375 ret = of_property_read_u32_array(dev->of_node, "mediatek,offset",
1377 ARRAY_SIZE(offset));
1379 dev_warn(dev, "%s(), get offset fail, ret %d\n", __func__, ret);
1382 btcvsd->infra_misc_offset = offset[0];
1383 btcvsd->conn_bt_cvsd_mask = offset[1];
1384 btcvsd->cvsd_mcu_read_offset = offset[2];
1385 btcvsd->cvsd_mcu_write_offset = offset[3];
1386 btcvsd->cvsd_packet_indicator = offset[4];
1388 btcvsd->bt_reg_pkt_r = btcvsd->bt_pkv_base +
1389 btcvsd->cvsd_mcu_read_offset;
1390 btcvsd->bt_reg_pkt_w = btcvsd->bt_pkv_base +
1391 btcvsd->cvsd_mcu_write_offset;
1392 btcvsd->bt_reg_ctl = btcvsd->bt_pkv_base +
1393 btcvsd->cvsd_packet_indicator;
1396 mtk_btcvsd_snd_set_state(btcvsd, btcvsd->tx, BT_SCO_STATE_IDLE);
1397 mtk_btcvsd_snd_set_state(btcvsd, btcvsd->rx, BT_SCO_STATE_IDLE);
1399 return devm_snd_soc_register_component(dev, &mtk_btcvsd_snd_platform,
1403 static int mtk_btcvsd_snd_remove(struct platform_device *pdev)
1405 struct mtk_btcvsd_snd *btcvsd = dev_get_drvdata(&pdev->dev);
1407 iounmap(btcvsd->bt_pkv_base);
1408 iounmap(btcvsd->bt_sram_bank2_base);
1412 static const struct of_device_id mtk_btcvsd_snd_dt_match[] = {
1413 { .compatible = "mediatek,mtk-btcvsd-snd", },
1416 MODULE_DEVICE_TABLE(of, mtk_btcvsd_snd_dt_match);
1418 static struct platform_driver mtk_btcvsd_snd_driver = {
1420 .name = "mtk-btcvsd-snd",
1421 .of_match_table = mtk_btcvsd_snd_dt_match,
1423 .probe = mtk_btcvsd_snd_probe,
1424 .remove = mtk_btcvsd_snd_remove,
1427 module_platform_driver(mtk_btcvsd_snd_driver);
1429 MODULE_DESCRIPTION("Mediatek ALSA BT SCO CVSD/MSBC Driver");
1430 MODULE_AUTHOR("KaiChieh Chuang <kaichieh.chuang@mediatek.com>");
1431 MODULE_LICENSE("GPL v2");