The patch
ASoC: mediatek: add btcvsd driver
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 4bd8597dc36c376a2bb1ef2c72984615bdeb68de Mon Sep 17 00:00:00 2001
From: KaiChieh Chuang kaichieh.chuang@mediatek.com Date: Wed, 30 Jan 2019 14:47:10 +0800 Subject: [PATCH] ASoC: mediatek: add btcvsd driver
The driver function for transferring/receiving BT encoded data to/from BT firmware.
Signed-off-by: KaiChieh Chuang kaichieh.chuang@mediatek.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/mediatek/Kconfig | 9 + sound/soc/mediatek/common/Makefile | 2 + sound/soc/mediatek/common/mtk-btcvsd.c | 1364 ++++++++++++++++++++++++ 3 files changed, 1375 insertions(+) create mode 100644 sound/soc/mediatek/common/mtk-btcvsd.c
diff --git a/sound/soc/mediatek/Kconfig b/sound/soc/mediatek/Kconfig index 8bb360ee7234..b35410e4020e 100644 --- a/sound/soc/mediatek/Kconfig +++ b/sound/soc/mediatek/Kconfig @@ -115,3 +115,12 @@ config SND_SOC_MT8183 that can be used with other codecs. Select Y if you have such device. If unsure select "N". + +config SND_SOC_MTK_BTCVSD + tristate "ALSA BT SCO CVSD/MSBC Driver" + help + This is for software BTCVSD. This enable + the function for transferring/receiving + BT encoded data to/from BT firmware. + Select Y if you have such device. + If unsure select "N". diff --git a/sound/soc/mediatek/common/Makefile b/sound/soc/mediatek/common/Makefile index cdadabc5fd16..9ab90433a8d7 100644 --- a/sound/soc/mediatek/common/Makefile +++ b/sound/soc/mediatek/common/Makefile @@ -2,3 +2,5 @@ # platform driver snd-soc-mtk-common-objs := mtk-afe-platform-driver.o mtk-afe-fe-dai.o obj-$(CONFIG_SND_SOC_MEDIATEK) += snd-soc-mtk-common.o + +obj-$(CONFIG_SND_SOC_MTK_BTCVSD) += mtk-btcvsd.o \ No newline at end of file diff --git a/sound/soc/mediatek/common/mtk-btcvsd.c b/sound/soc/mediatek/common/mtk-btcvsd.c new file mode 100644 index 000000000000..349a9120a0dd --- /dev/null +++ b/sound/soc/mediatek/common/mtk-btcvsd.c @@ -0,0 +1,1364 @@ +// 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, +}; + +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, bt->conn_bt_cvsd_mask); +} + +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, 0); +} + +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->tx->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; +} + +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) { + 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->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; +} + +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; +} + +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->rx); + + 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_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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_pcm_substream *substream, int cmd) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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_pcm_substream *substream, + int channel, unsigned long pos, + void __user *buf, unsigned long count) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_component *component = + snd_soc_rtdcom_lookup(rtd, BTCVSD_SND_NAME); + 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; +} + +static struct snd_pcm_ops mtk_btcvsd_ops = { + .open = mtk_pcm_btcvsd_open, + .close = mtk_pcm_btcvsd_close, + .ioctl = snd_pcm_lib_ioctl, + .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, +}; + +/* 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_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 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, + .ops = &mtk_btcvsd_ops, + .probe = mtk_btcvsd_snd_component_probe, +}; + +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) { + dev_err(dev, "%s no irq found\n", dev->of_node->name); + 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 offest 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");