// SPDX-License-Identifier: GPL-2.0
//
// Mediatek ALSA BT SCO CVSD/MSBC Driver
//
// Copyright (c) 2019 MediaTek Inc.
// Author: KaiChieh Chuang <kaichieh.chuang@mediatek.com>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/sched/clock.h>
#include <sound/soc.h>
#define BTCVSD_SND_NAME "mtk-btcvsd-snd"
#define BT_CVSD_TX_NREADY BIT(21)
#define BT_CVSD_RX_READY BIT(22)
#define BT_CVSD_TX_UNDERFLOW BIT(23)
#define BT_CVSD_RX_OVERFLOW BIT(24)
#define BT_CVSD_INTERRUPT BIT(31)
#define BT_CVSD_CLEAR \
(BT_CVSD_TX_NREADY | BT_CVSD_RX_READY | BT_CVSD_TX_UNDERFLOW |\
BT_CVSD_RX_OVERFLOW | BT_CVSD_INTERRUPT)
/* TX */
#define SCO_TX_ENCODE_SIZE (60)
/* 18 = 6 * 180 / SCO_TX_ENCODE_SIZE */
#define SCO_TX_PACKER_BUF_NUM (18)
/* RX */
#define SCO_RX_PLC_SIZE (30)
#define SCO_RX_PACKER_BUF_NUM (64)
#define SCO_RX_PACKET_MASK (0x3F)
#define SCO_CVSD_PACKET_VALID_SIZE 2
#define SCO_PACKET_120 120
#define SCO_PACKET_180 180
#define BTCVSD_RX_PACKET_SIZE (SCO_RX_PLC_SIZE + SCO_CVSD_PACKET_VALID_SIZE)
#define BTCVSD_TX_PACKET_SIZE (SCO_TX_ENCODE_SIZE)
#define BTCVSD_RX_BUF_SIZE (BTCVSD_RX_PACKET_SIZE * SCO_RX_PACKER_BUF_NUM)
#define BTCVSD_TX_BUF_SIZE (BTCVSD_TX_PACKET_SIZE * SCO_TX_PACKER_BUF_NUM)
enum bt_sco_state {
BT_SCO_STATE_IDLE,
BT_SCO_STATE_RUNNING,
BT_SCO_STATE_ENDING,
BT_SCO_STATE_LOOPBACK,
};
enum bt_sco_direct {
BT_SCO_DIRECT_BT2ARM,
BT_SCO_DIRECT_ARM2BT,
};
enum bt_sco_packet_len {
BT_SCO_CVSD_30 = 0,
BT_SCO_CVSD_60,
BT_SCO_CVSD_90,
BT_SCO_CVSD_120,
BT_SCO_CVSD_10,
BT_SCO_CVSD_20,
BT_SCO_CVSD_MAX,
};
enum BT_SCO_BAND {
BT_SCO_NB,
BT_SCO_WB,
};
struct mtk_btcvsd_snd_hw_info {
unsigned int num_valid_addr;
unsigned long bt_sram_addr[20];
unsigned int packet_length;
unsigned int packet_num;
};
struct mtk_btcvsd_snd_stream {
struct snd_pcm_substream *substream;
int stream;
enum bt_sco_state state;
unsigned int packet_size;
unsigned int buf_size;
u8 temp_packet_buf[SCO_PACKET_180];
int packet_w;
int packet_r;
snd_pcm_uframes_t prev_frame;
int prev_packet_idx;
unsigned int xrun:1;
unsigned int timeout:1;
unsigned int mute:1;
unsigned int trigger_start:1;
unsigned int wait_flag:1;
unsigned int rw_cnt;
unsigned long long time_stamp;
unsigned long long buf_data_equivalent_time;
struct mtk_btcvsd_snd_hw_info buffer_info;
};
struct mtk_btcvsd_snd {
struct device *dev;
int irq_id;
struct regmap *infra;
void __iomem *bt_pkv_base;
void __iomem *bt_sram_bank2_base;
unsigned int infra_misc_offset;
unsigned int conn_bt_cvsd_mask;
unsigned int cvsd_mcu_read_offset;
unsigned int cvsd_mcu_write_offset;
unsigned int cvsd_packet_indicator;
u32 *bt_reg_pkt_r;
u32 *bt_reg_pkt_w;
u32 *bt_reg_ctl;
unsigned int irq_disabled:1;
spinlock_t tx_lock; /* spinlock for bt tx stream control */
spinlock_t rx_lock; /* spinlock for bt rx stream control */
wait_queue_head_t tx_wait;
wait_queue_head_t rx_wait;
struct mtk_btcvsd_snd_stream *tx;
struct mtk_btcvsd_snd_stream *rx;
u8 tx_packet_buf[BTCVSD_TX_BUF_SIZE];
u8 rx_packet_buf[BTCVSD_RX_BUF_SIZE];
enum BT_SCO_BAND band;
};
struct mtk_btcvsd_snd_time_buffer_info {
unsigned long long data_count_equi_time;
unsigned long long time_stamp_us;
};
static const unsigned int btsco_packet_valid_mask[BT_SCO_CVSD_MAX][6] = {
{0x1, 0x1 << 1, 0x1 << 2, 0x1 << 3, 0x1 << 4, 0x1 << 5},
{0x1, 0x1, 0x2, 0x2, 0x4, 0x4},
{0x1, 0x1, 0x1, 0x2, 0x2, 0x2},
{0x1, 0x1, 0x1, 0x1, 0x0, 0x0},
{0x7, 0x7 << 3, 0x7 << 6, 0x7 << 9, 0x7 << 12, 0x7 << 15},
{0x3, 0x3 << 1, 0x3 << 3, 0x3 << 4, 0x3 << 6, 0x3 << 7},
};
static const unsigned int btsco_packet_info[BT_SCO_CVSD_MAX][4] = {
{30, 6, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
SCO_PACKET_180 / SCO_RX_PLC_SIZE},
{60, 3, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
SCO_PACKET_180 / SCO_RX_PLC_SIZE},
{90, 2, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
SCO_PACKET_180 / SCO_RX_PLC_SIZE},
{120, 1, SCO_PACKET_120 / SCO_TX_ENCODE_SIZE,
SCO_PACKET_120 / SCO_RX_PLC_SIZE},
{10, 18, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
SCO_PACKET_180 / SCO_RX_PLC_SIZE},
{20, 9, SCO_PACKET_180 / SCO_TX_ENCODE_SIZE,
SCO_PACKET_180 / SCO_RX_PLC_SIZE},
};
static const u8 table_msbc_silence[SCO_PACKET_180] = {
0x01, 0x38, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00,
0x01, 0xc8, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00,
0x01, 0xf8, 0xad, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, 0x00,
0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d,
0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7,
0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77, 0x6d, 0xb6, 0xdd,
0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6d, 0xdd, 0xb6, 0xdb, 0x77,
0x6d, 0xb6, 0xdd, 0xdb, 0x6d, 0xb7, 0x76, 0xdb, 0x6c, 0x00
};
static void mtk_btcvsd_snd_irq_enable(struct mtk_btcvsd_snd *bt)
{
regmap_update_bits(bt->infra, bt->infra_misc_offset,
bt->conn_bt_cvsd_mask, 0);
}
static void mtk_btcvsd_snd_irq_disable(struct mtk_btcvsd_snd *bt)
{
regmap_update_bits(bt->infra, bt->infra_misc_offset,
bt->conn_bt_cvsd_mask, bt->conn_bt_cvsd_mask);
}
static void mtk_btcvsd_snd_set_state(struct mtk_btcvsd_snd *bt,
struct mtk_btcvsd_snd_stream *bt_stream,
int state)
{
dev_dbg(bt->dev, "%s(), stream %d, state %d, tx->state %d, rx->state %d, irq_disabled %d\n",
__func__,
bt_stream->stream, state,
bt->tx->state, bt->rx->state, bt->irq_disabled);
bt_stream->state = state;
if (bt->tx->state == BT_SCO_STATE_IDLE &&
bt->rx->state == BT_SCO_STATE_IDLE) {
if (!bt->irq_disabled) {
disable_irq(bt->irq_id);
mtk_btcvsd_snd_irq_disable(bt);
bt->irq_disabled = 1;
}
} else {
if (bt->irq_disabled) {
enable_irq(bt->irq_id);
mtk_btcvsd_snd_irq_enable(bt);
bt->irq_disabled = 0;
}
}
}
static int mtk_btcvsd_snd_tx_init(struct mtk_btcvsd_snd *bt)
{
memset(bt->tx, 0, sizeof(*bt->tx));
memset(bt->tx_packet_buf, 0, sizeof(bt->tx_packet_buf));
bt->tx->packet_size = BTCVSD_TX_PACKET_SIZE;
bt->tx->buf_size = BTCVSD_TX_BUF_SIZE;
bt->tx->timeout = 0;
bt->tx->rw_cnt = 0;
bt->tx->stream = SNDRV_PCM_STREAM_PLAYBACK;
return 0;
}
static int mtk_btcvsd_snd_rx_init(struct mtk_btcvsd_snd *bt)
{
memset(bt->rx, 0, sizeof(*bt->rx));
memset(bt->rx_packet_buf, 0, sizeof(bt->rx_packet_buf));
bt->rx->packet_size = BTCVSD_RX_PACKET_SIZE;
bt->rx->buf_size = BTCVSD_RX_BUF_SIZE;
bt->rx->timeout = 0;
bt->rx->rw_cnt = 0;
bt->rx->stream = SNDRV_PCM_STREAM_CAPTURE;
return 0;
}
static void get_tx_time_stamp(struct mtk_btcvsd_snd *bt,
struct mtk_btcvsd_snd_time_buffer_info *ts)
{
ts->time_stamp_us = bt->tx->time_stamp;
ts->data_count_equi_time = bt->tx->buf_data_equivalent_time;
}
static void get_rx_time_stamp(struct mtk_btcvsd_snd *bt,
struct mtk_btcvsd_snd_time_buffer_info *ts)
{
ts->time_stamp_us = bt->rx->time_stamp;
ts->data_count_equi_time = bt->rx->buf_data_equivalent_time;
}
static int btcvsd_bytes_to_frame(struct snd_pcm_substream *substream,
int bytes)
{
int count = bytes;
struct snd_pcm_runtime *runtime = substream->runtime;
if (runtime->format == SNDRV_PCM_FORMAT_S32_LE ||
runtime->format == SNDRV_PCM_FORMAT_U32_LE)
count = count >> 2;
else
count = count >> 1;
count = count / runtime->channels;
return count;
}
static void mtk_btcvsd_snd_data_transfer(enum bt_sco_direct dir,
u8 *src, u8 *dst,
unsigned int blk_size,
unsigned int blk_num)
{
unsigned int i, j;
if (blk_size == 60 || blk_size == 120 || blk_size == 20) {
u32 *src_32 = (u32 *)src;
u32 *dst_32 = (u32 *)dst;
for (i = 0; i < (blk_size * blk_num / 4); i++)
*dst_32++ = *src_32++;
} else {
u16 *src_16 = (u16 *)src;
u16 *dst_16 = (u16 *)dst;
for (j = 0; j < blk_num; j++) {
for (i = 0; i < (blk_size / 2); i++)
*dst_16++ = *src_16++;
if (dir == BT_SCO_DIRECT_BT2ARM)
src_16++;
else
dst_16++;
}
}
}
/* write encoded mute data to bt sram */
static int btcvsd_tx_clean_buffer(struct mtk_btcvsd_snd *bt)
{
unsigned int i;
unsigned int num_valid_addr;
unsigned long flags;
enum BT_SCO_BAND band = bt->band;
/* prepare encoded mute data */
if (band == BT_SCO_NB)
memset(bt->tx->temp_packet_buf, 170, SCO_PACKET_180);
else
memcpy(bt->tx->temp_packet_buf,
table_msbc_silence, SCO_PACKET_180);
/* write mute data to bt tx sram buffer */
spin_lock_irqsave(&bt->tx_lock, flags);
num_valid_addr = bt->tx->buffer_info.num_valid_addr;
dev_info(bt->dev, "%s(), band %d, num_valid_addr %u\n",
__func__, band, num_valid_addr);
for (i = 0; i < num_valid_addr; i++) {
void *dst;
dev_info(bt->dev, "%s(), clean addr 0x%lx\n", __func__,
bt->tx->buffer_info.bt_sram_addr[i]);
dst = (void *)bt->tx->buffer_info.bt_sram_addr[i];
mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
bt->tx->temp_packet_buf, dst,
bt->tx->buffer_info.packet_length,
bt->tx->buffer_info.packet_num);
}
spin_unlock_irqrestore(&bt->tx_lock, flags);
return 0;
}
static int mtk_btcvsd_read_from_bt(struct mtk_btcvsd_snd *bt,
enum bt_sco_packet_len packet_type,
unsigned int packet_length,
unsigned int packet_num,
unsigned int blk_size,
unsigned int control)
{
unsigned int i;
int pv;
u8 *src;
unsigned int packet_buf_ofs;
unsigned long flags;
unsigned long connsys_addr_rx, ap_addr_rx;
connsys_addr_rx = *bt->bt_reg_pkt_r;
ap_addr_rx = (unsigned long)bt->bt_sram_bank2_base +
(connsys_addr_rx & 0xFFFF);
if (connsys_addr_rx == 0xdeadfeed) {
/* bt return 0xdeadfeed if read register during bt sleep */
dev_warn(bt->dev, "%s(), connsys_addr_rx == 0xdeadfeed",
__func__);
return -EIO;
}
src = (u8 *)ap_addr_rx;
mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_BT2ARM, src,
bt->rx->temp_packet_buf, packet_length,
packet_num);
spin_lock_irqsave(&bt->rx_lock, flags);
for (i = 0; i < blk_size; i++) {
packet_buf_ofs = (bt->rx->packet_w & SCO_RX_PACKET_MASK) *
bt->rx->packet_size;
memcpy(bt->rx_packet_buf + packet_buf_ofs,
bt->rx->temp_packet_buf + (SCO_RX_PLC_SIZE * i),
SCO_RX_PLC_SIZE);
if ((control & btsco_packet_valid_mask[packet_type][i]) ==
btsco_packet_valid_mask[packet_type][i])
pv = 1;
else
pv = 0;
packet_buf_ofs += SCO_RX_PLC_SIZE;
memcpy(bt->rx_packet_buf + packet_buf_ofs, (void *)&pv,
SCO_CVSD_PACKET_VALID_SIZE);
bt->rx->packet_w++;
}
spin_unlock_irqrestore(&bt->rx_lock, flags);
return 0;
}
static int mtk_btcvsd_write_to_bt(struct mtk_btcvsd_snd *bt,
enum bt_sco_packet_len packet_type,
unsigned int packet_length,
unsigned int packet_num,
unsigned int blk_size)
{
unsigned int i;
unsigned long flags;
u8 *dst;
unsigned long connsys_addr_tx, ap_addr_tx;
bool new_ap_addr_tx = true;
connsys_addr_tx = *bt->bt_reg_pkt_w;
ap_addr_tx = (unsigned long)bt->bt_sram_bank2_base +
(connsys_addr_tx & 0xFFFF);
if (connsys_addr_tx == 0xdeadfeed) {
/* bt return 0xdeadfeed if read register during bt sleep */
dev_warn(bt->dev, "%s(), connsys_addr_tx == 0xdeadfeed\n",
__func__);
return -EIO;
}
spin_lock_irqsave(&bt->tx_lock, flags);
for (i = 0; i < blk_size; i++) {
memcpy(bt->tx->temp_packet_buf + (bt->tx->packet_size * i),
(bt->tx_packet_buf +
(bt->tx->packet_r % SCO_TX_PACKER_BUF_NUM) *
bt->tx->packet_size),
bt->tx->packet_size);
bt->tx->packet_r++;
}
spin_unlock_irqrestore(&bt->tx_lock, flags);
dst = (u8 *)ap_addr_tx;
if (!bt->tx->mute) {
mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
bt->tx->temp_packet_buf, dst,
packet_length, packet_num);
}
/* store bt tx buffer sram info */
bt->tx->buffer_info.packet_length = packet_length;
bt->tx->buffer_info.packet_num = packet_num;
for (i = 0; i < bt->tx->buffer_info.num_valid_addr; i++) {
if (bt->tx->buffer_info.bt_sram_addr[i] == ap_addr_tx) {
new_ap_addr_tx = false;
break;
}
}
if (new_ap_addr_tx) {
unsigned int next_idx;
spin_lock_irqsave(&bt->tx_lock, flags);
bt->tx->buffer_info.num_valid_addr++;
next_idx = bt->tx->buffer_info.num_valid_addr - 1;
bt->tx->buffer_info.bt_sram_addr[next_idx] = ap_addr_tx;
spin_unlock_irqrestore(&bt->tx_lock, flags);
dev_info(bt->dev, "%s(), new ap_addr_tx = 0x%lx, num_valid_addr %d\n",
__func__, ap_addr_tx,
bt->tx->buffer_info.num_valid_addr);
}
if (bt->tx->mute)
btcvsd_tx_clean_buffer(bt);
return 0;
}
static irqreturn_t mtk_btcvsd_snd_irq_handler(int irq_id, void *dev)
{
struct mtk_btcvsd_snd *bt = dev;
unsigned int packet_type, packet_num, packet_length;
unsigned int buf_cnt_tx, buf_cnt_rx, control;
if (bt->rx->state != BT_SCO_STATE_RUNNING &&
bt->rx->state != BT_SCO_STATE_ENDING &&
bt->tx->state != BT_SCO_STATE_RUNNING &&
bt->tx->state != BT_SCO_STATE_ENDING &&
bt->tx->state != BT_SCO_STATE_LOOPBACK) {
dev_warn(bt->dev, "%s(), in idle state: rx->state: %d, tx->state: %d\n",
__func__, bt->rx->state, bt->tx->state);
goto irq_handler_exit;
}
control = *bt->bt_reg_ctl;
packet_type = (control >> 18) & 0x7;
if (((control >> 31) & 1) == 0) {
dev_warn(bt->dev, "%s(), ((control >> 31) & 1) == 0, control 0x%x\n",
__func__, control);
goto irq_handler_exit;
}
if (packet_type >= BT_SCO_CVSD_MAX) {
dev_warn(bt->dev, "%s(), invalid packet_type %u, exit\n",
__func__, packet_type);
goto irq_handler_exit;
}
packet_length = btsco_packet_info[packet_type][0];
packet_num = btsco_packet_info[packet_type][1];
buf_cnt_tx = btsco_packet_info[packet_type][2];
buf_cnt_rx = btsco_packet_info[packet_type][3];
if (bt->tx->state == BT_SCO_STATE_LOOPBACK) {
u8 *src, *dst;
unsigned long connsys_addr_rx, ap_addr_rx;
unsigned long connsys_addr_tx, ap_addr_tx;
connsys_addr_rx = *bt->bt_reg_pkt_r;
ap_addr_rx = (unsigned long)bt->bt_sram_bank2_base +
(connsys_addr_rx & 0xFFFF);
connsys_addr_tx = *bt->bt_reg_pkt_w;
ap_addr_tx = (unsigned long)bt->bt_sram_bank2_base +
(connsys_addr_tx & 0xFFFF);
if (connsys_addr_tx == 0xdeadfeed ||
connsys_addr_rx == 0xdeadfeed) {
/* bt return 0xdeadfeed if read reg during bt sleep */
dev_warn(bt->dev, "%s(), connsys_addr_tx == 0xdeadfeed\n",
__func__);
goto irq_handler_exit;
}
src = (u8 *)ap_addr_rx;
dst = (u8 *)ap_addr_tx;
mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_BT2ARM, src,
bt->tx->temp_packet_buf,
packet_length,
packet_num);
mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_ARM2BT,
bt->tx->temp_packet_buf, dst,
packet_length,
packet_num);
bt->rx->rw_cnt++;
bt->tx->rw_cnt++;
}
if (bt->rx->state == BT_SCO_STATE_RUNNING ||
bt->rx->state == BT_SCO_STATE_ENDING) {
if (bt->rx->xrun) {
if (bt->rx->packet_w - bt->rx->packet_r <=
SCO_RX_PACKER_BUF_NUM - 2 * buf_cnt_rx) {
/*
* free space is larger then
* twice interrupt rx data size
*/
bt->rx->xrun = 0;
dev_warn(bt->dev, "%s(), rx->xrun 0!\n",
__func__);
}
}
if (!bt->rx->xrun &&
(bt->rx->packet_w - bt->rx->packet_r <=
SCO_RX_PACKER_BUF_NUM - buf_cnt_rx)) {
mtk_btcvsd_read_from_bt(bt,
packet_type,
packet_length,
packet_num,
buf_cnt_rx,
control);
bt->rx->rw_cnt++;
} else {
bt->rx->xrun = 1;
dev_warn(bt->dev, "%s(), rx->xrun 1\n", __func__);
}
}
/* tx */
bt->tx->timeout = 0;
if ((bt->tx->state == BT_SCO_STATE_RUNNING ||
bt->tx->state == BT_SCO_STATE_ENDING) &&
bt->tx->trigger_start) {
if (bt->tx->xrun) {
/* prepared data is larger then twice
* interrupt tx data size
*/
if (bt->tx->packet_w - bt->tx->packet_r >=
2 * buf_cnt_tx) {
bt->tx->xrun = 0;
dev_warn(bt->dev, "%s(), tx->xrun 0\n",
__func__);
}
}
if ((!bt->tx->xrun &&
(bt->tx->packet_w - bt->tx->packet_r >= buf_cnt_tx)) ||
bt->tx->state == BT_SCO_STATE_ENDING) {
mtk_btcvsd_write_to_bt(bt,
packet_type,
packet_length,
packet_num,
buf_cnt_tx);
bt->tx->rw_cnt++;
} else {
bt->tx->xrun = 1;
dev_warn(bt->dev, "%s(), tx->xrun 1\n", __func__);
}
}
*bt->bt_reg_ctl &= ~BT_CVSD_CLEAR;
if (bt->rx->state == BT_SCO_STATE_RUNNING ||
bt->rx->state == BT_SCO_STATE_ENDING) {
bt->rx->wait_flag = 1;
wake_up_interruptible(&bt->rx_wait);
snd_pcm_period_elapsed(bt->rx->substream);
}
if (bt->tx->state == BT_SCO_STATE_RUNNING ||
bt->tx->state == BT_SCO_STATE_ENDING) {
bt->tx->wait_flag = 1;
wake_up_interruptible(&bt->tx_wait);
snd_pcm_period_elapsed(bt->tx->substream);
}
return IRQ_HANDLED;
irq_handler_exit:
*bt->bt_reg_ctl &= ~BT_CVSD_CLEAR;
return IRQ_HANDLED;
}
static int wait_for_bt_irq(struct mtk_btcvsd_snd *bt,
struct mtk_btcvsd_snd_stream *bt_stream)
{
unsigned long long t1, t2;
/* one interrupt period = 22.5ms */
unsigned long long timeout_limit = 22500000;
int max_timeout_trial = 2;
int ret;
bt_stream->wait_flag = 0;
while (max_timeout_trial && !bt_stream->wait_flag) {
t1 = sched_clock();
if (bt_stream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ret = wait_event_interruptible_timeout(bt->tx_wait,
bt_stream->wait_flag,
nsecs_to_jiffies(timeout_limit));
} else {
ret = wait_event_interruptible_timeout(bt->rx_wait,
bt_stream->wait_flag,
nsecs_to_jiffies(timeout_limit));
}
t2 = sched_clock();
t2 = t2 - t1; /* in ns (10^9) */
if (t2 > timeout_limit) {
dev_warn(bt->dev, "%s(), stream %d, timeout %llu, limit %llu, ret %d, flag %d\n",
__func__, bt_stream->stream,
t2, timeout_limit, ret,
bt_stream->wait_flag);
}
if (ret < 0) {
/*
* error, -ERESTARTSYS if it was interrupted by
* a signal
*/
dev_warn(bt->dev, "%s(), stream %d, error, trial left %d\n",
__func__,
bt_stream->stream, max_timeout_trial);
bt_stream->timeout = 1;
return ret;
} else if (ret == 0) {
/* conidtion is false after timeout */
max_timeout_trial--;
dev_warn(bt->dev, "%s(), stream %d, error, timeout, condition is false, trial left %d\n",
__func__,
bt_stream->stream, max_timeout_trial);
if (max_timeout_trial <= 0) {
bt_stream->timeout = 1;
return -ETIME;
}
}
}
return 0;
}
static ssize_t mtk_btcvsd_snd_read(struct mtk_btcvsd_snd *bt,
char __user *buf,
size_t count)
{
ssize_t read_size = 0, read_count = 0, cur_read_idx, cont;
unsigned int cur_buf_ofs = 0;
unsigned long avail;
unsigned long flags;
unsigned int packet_size = bt->rx->packet_size;
while (count) {
spin_lock_irqsave(&bt->rx_lock, flags);
/* available data in RX packet buffer */
avail = (bt->rx->packet_w - bt->rx->packet_r) * packet_size;
cur_read_idx = (bt->rx->packet_r & SCO_RX_PACKET_MASK) *
packet_size;
spin_unlock_irqrestore(&bt->rx_lock, flags);
if (!avail) {
int ret = wait_for_bt_irq(bt, bt->rx);
if (ret)
return read_count;
continue;
}
/* count must be multiple of packet_size */
if (count % packet_size != 0 ||
avail % packet_size != 0) {
dev_warn(bt->dev, "%s(), count %zu or d %lu is not multiple of packet_size %dd\n",
__func__, count, avail, packet_size);
count -= count % packet_size;
avail -= avail % packet_size;
}
if (count > avail)
read_size = avail;
else
read_size = count;
/* calculate continue space */
cont = bt->rx->buf_size - cur_read_idx;
if (read_size > cont)
read_size = cont;
if (copy_to_user(buf + cur_buf_ofs,
bt->rx_packet_buf + cur_read_idx,
read_size)) {
dev_warn(bt->dev, "%s(), copy_to_user fail\n",
__func__);
return -EFAULT;
}
spin_lock_irqsave(&bt->rx_lock, flags);
bt->rx->packet_r += read_size / packet_size;
spin_unlock_irqrestore(&bt->rx_lock, flags);
read_count += read_size;
cur_buf_ofs += read_size;
count -= read_size;
}
/*
* save current timestamp & buffer time in times_tamp and
* buf_data_equivalent_time
*/
bt->rx->time_stamp = sched_clock();
bt->rx->buf_data_equivalent_time =
(unsigned long long)(bt->rx->packet_w - bt->rx->packet_r) *
SCO_RX_PLC_SIZE * 16 * 1000 / 2 / 64;
bt->rx->buf_data_equivalent_time += read_count * SCO_RX_PLC_SIZE *
16 * 1000 / packet_size / 2 / 64;
/* return equivalent time(us) to data count */
bt->rx->buf_data_equivalent_time *= 1000;
return read_count;
}
static ssize_t mtk_btcvsd_snd_write(struct mtk_btcvsd_snd *bt,
char __user *buf,
size_t count)
{
int written_size = count, avail = 0, cur_write_idx, write_size, cont;
unsigned int cur_buf_ofs = 0;
unsigned long flags;
unsigned int packet_size = bt->tx->packet_size;
/*
* save current timestamp & buffer time in time_stamp and
* buf_data_equivalent_time
*/
bt->tx->time_stamp = sched_clock();
bt->tx->buf_data_equivalent_time =
(unsigned long long)(bt->tx->packet_w - bt->tx->packet_r) *
packet_size * 16 * 1000 / 2 / 64;
/* return equivalent time(us) to data count */
bt->tx->buf_data_equivalent_time *= 1000;
while (count) {
spin_lock_irqsave(&bt->tx_lock, flags);
/* free space of TX packet buffer */
avail = bt->tx->buf_size -
(bt->tx->packet_w - bt->tx->packet_r) * packet_size;
cur_write_idx = (bt->tx->packet_w % SCO_TX_PACKER_BUF_NUM) *
packet_size;
spin_unlock_irqrestore(&bt->tx_lock, flags);
if (!avail) {
int ret = wait_for_bt_irq(bt, bt->tx);
if (ret)
return written_size;
continue;
}
/* count must be multiple of bt->tx->packet_size */
if (count % packet_size != 0 ||
avail % packet_size != 0) {
dev_warn(bt->dev, "%s(), count %zu or avail %d is not multiple of packet_size %d\n",
__func__, count, avail, packet_size);
count -= count % packet_size;
avail -= avail % packet_size;
}
if (count > avail)
write_size = avail;
else
write_size = count;
/* calculate continue space */
cont = bt->tx->buf_size - cur_write_idx;
if (write_size > cont)
write_size = cont;
if (copy_from_user(bt->tx_packet_buf +
cur_write_idx,
buf + cur_buf_ofs,
write_size)) {
dev_warn(bt->dev, "%s(), copy_from_user fail\n",
__func__);
return -EFAULT;
}
spin_lock_irqsave(&bt->tx_lock, flags);
bt->tx->packet_w += write_size / packet_size;
spin_unlock_irqrestore(&bt->tx_lock, flags);
cur_buf_ofs += write_size;
count -= write_size;
}
return written_size;
}
static struct mtk_btcvsd_snd_stream *get_bt_stream
(struct mtk_btcvsd_snd *bt, struct snd_pcm_substream *substream)
{
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return bt->tx;
else
return bt->rx;
}
/* pcm ops */
static const struct snd_pcm_hardware mtk_btcvsd_hardware = {
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_RESUME),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.buffer_bytes_max = 24 * 1024,
.period_bytes_max = 24 * 1024,
.periods_min = 2,
.periods_max = 16,
.fifo_size = 0,
};
static int mtk_pcm_btcvsd_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
int ret;
dev_dbg(bt->dev, "%s(), stream %d, substream %p\n",
__func__, substream->stream, substream);
snd_soc_set_runtime_hwparams(substream, &mtk_btcvsd_hardware);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ret = mtk_btcvsd_snd_tx_init(bt);
bt->tx->substream = substream;
} else {
ret = mtk_btcvsd_snd_rx_init(bt);
bt->rx->substream = substream;
}
return ret;
}
static int mtk_pcm_btcvsd_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
dev_dbg(bt->dev, "%s(), stream %d\n", __func__, substream->stream);
mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_IDLE);
bt_stream->substream = NULL;
return 0;
}
static int mtk_pcm_btcvsd_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
params_buffer_bytes(hw_params) % bt->tx->packet_size != 0) {
dev_warn(bt->dev, "%s(), error, buffer size %d not valid\n",
__func__,
params_buffer_bytes(hw_params));
return -EINVAL;
}
substream->runtime->dma_bytes = params_buffer_bytes(hw_params);
return 0;
}
static int mtk_pcm_btcvsd_hw_free(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
btcvsd_tx_clean_buffer(bt);
return 0;
}
static int mtk_pcm_btcvsd_prepare(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
dev_dbg(bt->dev, "%s(), stream %d\n", __func__, substream->stream);
mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_RUNNING);
return 0;
}
static int mtk_pcm_btcvsd_trigger(struct snd_soc_component *component,
struct snd_pcm_substream *substream, int cmd)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
struct mtk_btcvsd_snd_stream *bt_stream = get_bt_stream(bt, substream);
int stream = substream->stream;
int hw_packet_ptr;
dev_dbg(bt->dev, "%s(), stream %d, cmd %d\n",
__func__, substream->stream, cmd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
hw_packet_ptr = stream == SNDRV_PCM_STREAM_PLAYBACK ?
bt_stream->packet_r : bt_stream->packet_w;
bt_stream->prev_packet_idx = hw_packet_ptr;
bt_stream->prev_frame = 0;
bt_stream->trigger_start = 1;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
bt_stream->trigger_start = 0;
mtk_btcvsd_snd_set_state(bt, bt_stream, BT_SCO_STATE_ENDING);
return 0;
default:
return -EINVAL;
}
}
static snd_pcm_uframes_t mtk_pcm_btcvsd_pointer(
struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
struct mtk_btcvsd_snd_stream *bt_stream;
snd_pcm_uframes_t frame = 0;
int byte = 0;
int hw_packet_ptr;
int packet_diff;
spinlock_t *lock; /* spinlock for bt stream control */
unsigned long flags;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
lock = &bt->tx_lock;
bt_stream = bt->tx;
} else {
lock = &bt->rx_lock;
bt_stream = bt->rx;
}
spin_lock_irqsave(lock, flags);
hw_packet_ptr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
bt->tx->packet_r : bt->rx->packet_w;
/* get packet diff from last time */
if (hw_packet_ptr >= bt_stream->prev_packet_idx) {
packet_diff = hw_packet_ptr - bt_stream->prev_packet_idx;
} else {
/* integer overflow */
packet_diff = (INT_MAX - bt_stream->prev_packet_idx) +
(hw_packet_ptr - INT_MIN) + 1;
}
bt_stream->prev_packet_idx = hw_packet_ptr;
/* increased bytes */
byte = packet_diff * bt_stream->packet_size;
frame = btcvsd_bytes_to_frame(substream, byte);
frame += bt_stream->prev_frame;
frame %= substream->runtime->buffer_size;
bt_stream->prev_frame = frame;
spin_unlock_irqrestore(lock, flags);
return frame;
}
static int mtk_pcm_btcvsd_copy(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
int channel, unsigned long pos,
void __user *buf, unsigned long count)
{
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(component);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
mtk_btcvsd_snd_write(bt, buf, count);
else
mtk_btcvsd_snd_read(bt, buf, count);
return 0;
}
/* kcontrol */
static const char *const btsco_band_str[] = {"NB", "WB"};
static const struct soc_enum btcvsd_enum[] = {
SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(btsco_band_str), btsco_band_str),
};
static int btcvsd_band_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
ucontrol->value.integer.value[0] = bt->band;
return 0;
}
static int btcvsd_band_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
if (ucontrol->value.enumerated.item[0] >= e->items)
return -EINVAL;
bt->band = ucontrol->value.integer.value[0];
dev_dbg(bt->dev, "%s(), band %d\n", __func__, bt->band);
return 0;
}
static int btcvsd_loopback_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
bool lpbk_en = bt->tx->state == BT_SCO_STATE_LOOPBACK;
ucontrol->value.integer.value[0] = lpbk_en;
return 0;
}
static int btcvsd_loopback_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
if (ucontrol->value.integer.value[0]) {
mtk_btcvsd_snd_set_state(bt, bt->tx, BT_SCO_STATE_LOOPBACK);
mtk_btcvsd_snd_set_state(bt, bt->rx, BT_SCO_STATE_LOOPBACK);
} else {
mtk_btcvsd_snd_set_state(bt, bt->tx, BT_SCO_STATE_RUNNING);
mtk_btcvsd_snd_set_state(bt, bt->rx, BT_SCO_STATE_RUNNING);
}
return 0;
}
static int btcvsd_tx_mute_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
if (!bt->tx) {
ucontrol->value.integer.value[0] = 0;
return 0;
}
ucontrol->value.integer.value[0] = bt->tx->mute;
return 0;
}
static int btcvsd_tx_mute_set(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
if (!bt->tx)
return 0;
bt->tx->mute = ucontrol->value.integer.value[0];
return 0;
}
static int btcvsd_rx_irq_received_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
if (!bt->rx)
return 0;
ucontrol->value.integer.value[0] = bt->rx->rw_cnt ? 1 : 0;
return 0;
}
static int btcvsd_rx_timeout_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
if (!bt->rx)
return 0;
ucontrol->value.integer.value[0] = bt->rx->timeout;
bt->rx->timeout = 0;
return 0;
}
static int btcvsd_rx_timestamp_get(struct snd_kcontrol *kcontrol,
unsigned int __user *data, unsigned int size)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
int ret = 0;
struct mtk_btcvsd_snd_time_buffer_info time_buffer_info_rx;
if (size > sizeof(struct mtk_btcvsd_snd_time_buffer_info))
return -EINVAL;
get_rx_time_stamp(bt, &time_buffer_info_rx);
dev_dbg(bt->dev, "%s(), time_stamp_us %llu, data_count_equi_time %llu",
__func__,
time_buffer_info_rx.time_stamp_us,
time_buffer_info_rx.data_count_equi_time);
if (copy_to_user(data, &time_buffer_info_rx,
sizeof(struct mtk_btcvsd_snd_time_buffer_info))) {
dev_warn(bt->dev, "%s(), copy_to_user fail", __func__);
ret = -EFAULT;
}
return ret;
}
static int btcvsd_tx_irq_received_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
if (!bt->tx)
return 0;
ucontrol->value.integer.value[0] = bt->tx->rw_cnt ? 1 : 0;
return 0;
}
static int btcvsd_tx_timeout_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
ucontrol->value.integer.value[0] = bt->tx->timeout;
return 0;
}
static int btcvsd_tx_timestamp_get(struct snd_kcontrol *kcontrol,
unsigned int __user *data, unsigned int size)
{
struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
struct mtk_btcvsd_snd *bt = snd_soc_component_get_drvdata(cmpnt);
int ret = 0;
struct mtk_btcvsd_snd_time_buffer_info time_buffer_info_tx;
if (size > sizeof(struct mtk_btcvsd_snd_time_buffer_info))
return -EINVAL;
get_tx_time_stamp(bt, &time_buffer_info_tx);
dev_dbg(bt->dev, "%s(), time_stamp_us %llu, data_count_equi_time %llu",
__func__,
time_buffer_info_tx.time_stamp_us,
time_buffer_info_tx.data_count_equi_time);
if (copy_to_user(data, &time_buffer_info_tx,
sizeof(struct mtk_btcvsd_snd_time_buffer_info))) {
dev_warn(bt->dev, "%s(), copy_to_user fail", __func__);
ret = -EFAULT;
}
return ret;
}
static const struct snd_kcontrol_new mtk_btcvsd_snd_controls[] = {
SOC_ENUM_EXT("BTCVSD Band", btcvsd_enum[0],
btcvsd_band_get, btcvsd_band_set),
SOC_SINGLE_BOOL_EXT("BTCVSD Loopback Switch", 0,
btcvsd_loopback_get, btcvsd_loopback_set),
SOC_SINGLE_BOOL_EXT("BTCVSD Tx Mute Switch", 0,
btcvsd_tx_mute_get, btcvsd_tx_mute_set),
SOC_SINGLE_BOOL_EXT("BTCVSD Tx Irq Received Switch", 0,
btcvsd_tx_irq_received_get, NULL),
SOC_SINGLE_BOOL_EXT("BTCVSD Tx Timeout Switch", 0,
btcvsd_tx_timeout_get, NULL),
SOC_SINGLE_BOOL_EXT("BTCVSD Rx Irq Received Switch", 0,
btcvsd_rx_irq_received_get, NULL),
SOC_SINGLE_BOOL_EXT("BTCVSD Rx Timeout Switch", 0,
btcvsd_rx_timeout_get, NULL),
SND_SOC_BYTES_TLV("BTCVSD Rx Timestamp",
sizeof(struct mtk_btcvsd_snd_time_buffer_info),
btcvsd_rx_timestamp_get, NULL),
SND_SOC_BYTES_TLV("BTCVSD Tx Timestamp",
sizeof(struct mtk_btcvsd_snd_time_buffer_info),
btcvsd_tx_timestamp_get, NULL),
};
static int mtk_btcvsd_snd_component_probe(struct snd_soc_component *component)
{
return snd_soc_add_component_controls(component,
mtk_btcvsd_snd_controls,
ARRAY_SIZE(mtk_btcvsd_snd_controls));
}
static const struct snd_soc_component_driver mtk_btcvsd_snd_platform = {
.name = BTCVSD_SND_NAME,
.probe = mtk_btcvsd_snd_component_probe,
.open = mtk_pcm_btcvsd_open,
.close = mtk_pcm_btcvsd_close,
.hw_params = mtk_pcm_btcvsd_hw_params,
.hw_free = mtk_pcm_btcvsd_hw_free,
.prepare = mtk_pcm_btcvsd_prepare,
.trigger = mtk_pcm_btcvsd_trigger,
.pointer = mtk_pcm_btcvsd_pointer,
.copy_user = mtk_pcm_btcvsd_copy,
};
static int mtk_btcvsd_snd_probe(struct platform_device *pdev)
{
int ret = 0;
int irq_id;
u32 offset[5] = {0, 0, 0, 0, 0};
struct mtk_btcvsd_snd *btcvsd;
struct device *dev = &pdev->dev;
/* init btcvsd private data */
btcvsd = devm_kzalloc(dev, sizeof(*btcvsd), GFP_KERNEL);
if (!btcvsd)
return -ENOMEM;
platform_set_drvdata(pdev, btcvsd);
btcvsd->dev = dev;
/* init tx/rx */
btcvsd->rx = devm_kzalloc(btcvsd->dev, sizeof(*btcvsd->rx), GFP_KERNEL);
if (!btcvsd->rx)
return -ENOMEM;
btcvsd->tx = devm_kzalloc(btcvsd->dev, sizeof(*btcvsd->tx), GFP_KERNEL);
if (!btcvsd->tx)
return -ENOMEM;
spin_lock_init(&btcvsd->tx_lock);
spin_lock_init(&btcvsd->rx_lock);
init_waitqueue_head(&btcvsd->tx_wait);
init_waitqueue_head(&btcvsd->rx_wait);
mtk_btcvsd_snd_tx_init(btcvsd);
mtk_btcvsd_snd_rx_init(btcvsd);
/* irq */
irq_id = platform_get_irq(pdev, 0);
if (irq_id <= 0)
return irq_id < 0 ? irq_id : -ENXIO;
ret = devm_request_irq(dev, irq_id, mtk_btcvsd_snd_irq_handler,
IRQF_TRIGGER_LOW, "BTCVSD_ISR_Handle",
(void *)btcvsd);
if (ret) {
dev_err(dev, "could not request_irq for BTCVSD_ISR_Handle\n");
return ret;
}
btcvsd->irq_id = irq_id;
/* iomap */
btcvsd->bt_pkv_base = of_iomap(dev->of_node, 0);
if (!btcvsd->bt_pkv_base) {
dev_err(dev, "iomap bt_pkv_base fail\n");
return -EIO;
}
btcvsd->bt_sram_bank2_base = of_iomap(dev->of_node, 1);
if (!btcvsd->bt_sram_bank2_base) {
dev_err(dev, "iomap bt_sram_bank2_base fail\n");
return -EIO;
}
btcvsd->infra = syscon_regmap_lookup_by_phandle(dev->of_node,
"mediatek,infracfg");
if (IS_ERR(btcvsd->infra)) {
dev_err(dev, "cannot find infra controller: %ld\n",
PTR_ERR(btcvsd->infra));
return PTR_ERR(btcvsd->infra);
}
/* get offset */
ret = of_property_read_u32_array(dev->of_node, "mediatek,offset",
offset,
ARRAY_SIZE(offset));
if (ret) {
dev_warn(dev, "%s(), get offset fail, ret %d\n", __func__, ret);
return ret;
}
btcvsd->infra_misc_offset = offset[0];
btcvsd->conn_bt_cvsd_mask = offset[1];
btcvsd->cvsd_mcu_read_offset = offset[2];
btcvsd->cvsd_mcu_write_offset = offset[3];
btcvsd->cvsd_packet_indicator = offset[4];
btcvsd->bt_reg_pkt_r = btcvsd->bt_pkv_base +
btcvsd->cvsd_mcu_read_offset;
btcvsd->bt_reg_pkt_w = btcvsd->bt_pkv_base +
btcvsd->cvsd_mcu_write_offset;
btcvsd->bt_reg_ctl = btcvsd->bt_pkv_base +
btcvsd->cvsd_packet_indicator;
/* init state */
mtk_btcvsd_snd_set_state(btcvsd, btcvsd->tx, BT_SCO_STATE_IDLE);
mtk_btcvsd_snd_set_state(btcvsd, btcvsd->rx, BT_SCO_STATE_IDLE);
return devm_snd_soc_register_component(dev, &mtk_btcvsd_snd_platform,
NULL, 0);
}
static int mtk_btcvsd_snd_remove(struct platform_device *pdev)
{
struct mtk_btcvsd_snd *btcvsd = dev_get_drvdata(&pdev->dev);
iounmap(btcvsd->bt_pkv_base);
iounmap(btcvsd->bt_sram_bank2_base);
return 0;
}
static const struct of_device_id mtk_btcvsd_snd_dt_match[] = {
{ .compatible = "mediatek,mtk-btcvsd-snd", },
{},
};
MODULE_DEVICE_TABLE(of, mtk_btcvsd_snd_dt_match);
static struct platform_driver mtk_btcvsd_snd_driver = {
.driver = {
.name = "mtk-btcvsd-snd",
.of_match_table = mtk_btcvsd_snd_dt_match,
},
.probe = mtk_btcvsd_snd_probe,
.remove = mtk_btcvsd_snd_remove,
};
module_platform_driver(mtk_btcvsd_snd_driver);
MODULE_DESCRIPTION("Mediatek ALSA BT SCO CVSD/MSBC Driver");
MODULE_AUTHOR("KaiChieh Chuang <kaichieh.chuang@mediatek.com>");
MODULE_LICENSE("GPL v2");