diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/firewire/tascam/Makefile | 3 | ||||
| -rw-r--r-- | sound/firewire/tascam/tascam-stream.c | 457 | ||||
| -rw-r--r-- | sound/firewire/tascam/tascam.c | 12 | ||||
| -rw-r--r-- | sound/firewire/tascam/tascam.h | 36 |
4 files changed, 506 insertions, 2 deletions
diff --git a/sound/firewire/tascam/Makefile b/sound/firewire/tascam/Makefile index d06c737..0a1c387 100644 --- a/sound/firewire/tascam/Makefile +++ b/sound/firewire/tascam/Makefile @@ -1,2 +1,3 @@ -snd-firewire-tascam-objs := tascam-proc.o amdtp-tascam.o tascam.o +snd-firewire-tascam-objs := tascam-proc.o amdtp-tascam.o tascam-stream.o \ + tascam.o obj-$(CONFIG_SND_FIREWIRE_TASCAM) += snd-firewire-tascam.o diff --git a/sound/firewire/tascam/tascam-stream.c b/sound/firewire/tascam/tascam-stream.c new file mode 100644 index 0000000..0732f7f --- /dev/null +++ b/sound/firewire/tascam/tascam-stream.c @@ -0,0 +1,457 @@ +/* + * tascam-stream.c - a part of driver for TASCAM FireWire series + * + * Copyright (c) 2015 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include <linux/delay.h> +#include "tascam.h" + +#define CALLBACK_TIMEOUT 500 + +static int get_clock(struct snd_tscm *tscm, u32 *data) +{ + __be32 reg; + int err; + + err = snd_fw_transaction(tscm->unit, TCODE_READ_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_CLOCK_STATUS, + ®, sizeof(reg), 0); + if (err >= 0) + *data = be32_to_cpu(reg); + + return err; +} + +static int set_clock(struct snd_tscm *tscm, unsigned int rate, + enum snd_tscm_clock clock) +{ + u32 data; + __be32 reg; + int err; + + err = get_clock(tscm, &data); + if (err < 0) + return err; + data &= 0x0000ffff; + + if (rate > 0) { + data &= 0x000000ff; + /* Base rate. */ + if ((rate % 44100) == 0) { + data |= 0x00000100; + /* Multiplier. */ + if (rate / 44100 == 2) + data |= 0x00008000; + } else if ((rate % 48000) == 0) { + data |= 0x00000200; + /* Multiplier. */ + if (rate / 48000 == 2) + data |= 0x00008000; + } else { + return -EAGAIN; + } + } + + if (clock != INT_MAX) { + data &= 0x0000ff00; + data |= clock + 1; + } + + reg = cpu_to_be32(data); + + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_CLOCK_STATUS, + ®, sizeof(reg), 0); + if (err < 0) + return err; + + if (data & 0x00008000) + reg = cpu_to_be32(0x0000001a); + else + reg = cpu_to_be32(0x0000000d); + + return snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_MULTIPLEX_MODE, + ®, sizeof(reg), 0); +} + +int snd_tscm_stream_get_rate(struct snd_tscm *tscm, unsigned int *rate) +{ + u32 data = 0x0; + unsigned int trials = 0; + int err; + + while (data == 0x0 || trials++ < 5) { + err = get_clock(tscm, &data); + if (err < 0) + return err; + + data = (data & 0xff000000) >> 24; + } + + /* Check base rate. */ + if ((data & 0x0f) == 0x01) + *rate = 44100; + else if ((data & 0x0f) == 0x02) + *rate = 48000; + else + return -EAGAIN; + + /* Check multiplier. */ + if ((data & 0xf0) == 0x80) + *rate *= 2; + else if ((data & 0xf0) != 0x00) + return -EAGAIN; + + return err; +} + +int snd_tscm_stream_get_clock(struct snd_tscm *tscm, enum snd_tscm_clock *clock) +{ + u32 data; + int err; + + err = get_clock(tscm, &data); + if (err < 0) + return err; + + *clock = ((data & 0x00ff0000) >> 16) - 1; + if (*clock < 0 || *clock > SND_TSCM_CLOCK_ADAT) + return -EIO; + + return 0; +} + +static int enable_data_channels(struct snd_tscm *tscm) +{ + __be32 reg; + u32 data; + unsigned int i; + int err; + + data = 0; + for (i = 0; i < tscm->spec->pcm_capture_analog_channels; ++i) + data |= BIT(i); + if (tscm->spec->has_adat) + data |= 0x0000ff00; + if (tscm->spec->has_spdif) + data |= 0x00030000; + + reg = cpu_to_be32(data); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_TX_PCM_CHANNELS, + ®, sizeof(reg), 0); + if (err < 0) + return err; + + data = 0; + for (i = 0; i < tscm->spec->pcm_playback_analog_channels; ++i) + data |= BIT(i); + if (tscm->spec->has_adat) + data |= 0x0000ff00; + if (tscm->spec->has_spdif) + data |= 0x00030000; + + reg = cpu_to_be32(data); + return snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_RX_PCM_CHANNELS, + ®, sizeof(reg), 0); +} + +static int set_stream_formats(struct snd_tscm *tscm, unsigned int rate) +{ + __be32 reg; + int err; + + /* Set an option for unknown purpose. */ + reg = cpu_to_be32(0x00200000); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_SET_OPTION, + ®, sizeof(reg), 0); + if (err < 0) + return err; + + err = enable_data_channels(tscm); + if (err < 0) + return err; + + return set_clock(tscm, rate, INT_MAX); +} + +static void finish_session(struct snd_tscm *tscm) +{ + __be32 reg; + + reg = 0; + snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_START_STREAMING, + ®, sizeof(reg), 0); + + reg = 0; + snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_ON, + ®, sizeof(reg), 0); + +} + +static int begin_session(struct snd_tscm *tscm) +{ + __be32 reg; + int err; + + reg = cpu_to_be32(0x00000001); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_START_STREAMING, + ®, sizeof(reg), 0); + if (err < 0) + return err; + + reg = cpu_to_be32(0x00000001); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_ON, + ®, sizeof(reg), 0); + if (err < 0) + return err; + + /* Set an option for unknown purpose. */ + reg = cpu_to_be32(0x00002000); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_SET_OPTION, + ®, sizeof(reg), 0); + if (err < 0) + return err; + + /* Start multiplexing PCM samples on packets. */ + reg = cpu_to_be32(0x00000001); + return snd_fw_transaction(tscm->unit, + TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_TX_ON, + ®, sizeof(reg), 0); +} + +static void release_resources(struct snd_tscm *tscm) +{ + __be32 reg; + + /* Unregister channels. */ + reg = cpu_to_be32(0x00000000); + snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_TX_CH, + ®, sizeof(reg), 0); + reg = cpu_to_be32(0x00000000); + snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_UNKNOWN, + ®, sizeof(reg), 0); + reg = cpu_to_be32(0x00000000); + snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_CH, + ®, sizeof(reg), 0); + + /* Release isochronous resources. */ + fw_iso_resources_free(&tscm->tx_resources); + fw_iso_resources_free(&tscm->rx_resources); +} + +static int keep_resources(struct snd_tscm *tscm, unsigned int rate) +{ + __be32 reg; + int err; + + /* Keep resources for in-stream. */ + err = amdtp_tscm_set_parameters(&tscm->tx_stream, rate); + if (err < 0) + return err; + err = fw_iso_resources_allocate(&tscm->tx_resources, + amdtp_stream_get_max_payload(&tscm->tx_stream), + fw_parent_device(tscm->unit)->max_speed); + if (err < 0) + goto error; + + /* Keep resources for out-stream. */ + err = amdtp_tscm_set_parameters(&tscm->rx_stream, rate); + if (err < 0) + return err; + err = fw_iso_resources_allocate(&tscm->rx_resources, + amdtp_stream_get_max_payload(&tscm->rx_stream), + fw_parent_device(tscm->unit)->max_speed); + if (err < 0) + return err; + + /* Register the isochronous channel for transmitting stream. */ + reg = cpu_to_be32(tscm->tx_resources.channel); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_TX_CH, + ®, sizeof(reg), 0); + if (err < 0) + goto error; + + /* Unknown */ + reg = cpu_to_be32(0x00000002); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_UNKNOWN, + ®, sizeof(reg), 0); + if (err < 0) + goto error; + + /* Register the isochronous channel for receiving stream. */ + reg = cpu_to_be32(tscm->rx_resources.channel); + err = snd_fw_transaction(tscm->unit, TCODE_WRITE_QUADLET_REQUEST, + TSCM_ADDR_BASE + TSCM_OFFSET_ISOC_RX_CH, + ®, sizeof(reg), 0); + if (err < 0) + goto error; + + return 0; +error: + release_resources(tscm); + return err; +} + +int snd_tscm_stream_init_duplex(struct snd_tscm *tscm) +{ + unsigned int pcm_channels; + int err; + + /* For out-stream. */ + err = fw_iso_resources_init(&tscm->rx_resources, tscm->unit); + if (err < 0) + return err; + pcm_channels = tscm->spec->pcm_playback_analog_channels; + if (tscm->spec->has_adat) + pcm_channels += 8; + if (tscm->spec->has_spdif) + pcm_channels += 2; + err = amdtp_tscm_init(&tscm->rx_stream, tscm->unit, AMDTP_OUT_STREAM, + pcm_channels); + if (err < 0) + return err; + + /* For in-stream. */ + err = fw_iso_resources_init(&tscm->tx_resources, tscm->unit); + if (err < 0) + return err; + pcm_channels = tscm->spec->pcm_capture_analog_channels; + if (tscm->spec->has_adat) + pcm_channels += 8; + if (tscm->spec->has_spdif) + pcm_channels += 2; + err = amdtp_tscm_init(&tscm->tx_stream, tscm->unit, AMDTP_IN_STREAM, + pcm_channels); + if (err < 0) + amdtp_stream_destroy(&tscm->rx_stream); + + return 0; +} + +/* At bus reset, streaming is stopped and some registers are clear. */ +void snd_tscm_stream_update_duplex(struct snd_tscm *tscm) +{ + amdtp_stream_pcm_abort(&tscm->tx_stream); + amdtp_stream_stop(&tscm->tx_stream); + + amdtp_stream_pcm_abort(&tscm->rx_stream); + amdtp_stream_stop(&tscm->rx_stream); +} + +/* + * This function should be called before starting streams or after stopping + * streams. + */ +void snd_tscm_stream_destroy_duplex(struct snd_tscm *tscm) +{ + amdtp_stream_destroy(&tscm->rx_stream); + amdtp_stream_destroy(&tscm->tx_stream); + + fw_iso_resources_destroy(&tscm->rx_resources); + fw_iso_resources_destroy(&tscm->tx_resources); +} + +int snd_tscm_stream_start_duplex(struct snd_tscm *tscm, unsigned int rate) +{ + unsigned int curr_rate; + int err; + + if (tscm->substreams_counter == 0) + return 0; + + err = snd_tscm_stream_get_rate(tscm, &curr_rate); + if (err < 0) + return err; + if (curr_rate != rate || + amdtp_streaming_error(&tscm->tx_stream) || + amdtp_streaming_error(&tscm->rx_stream)) { + finish_session(tscm); + + amdtp_stream_stop(&tscm->tx_stream); + amdtp_stream_stop(&tscm->rx_stream); + + release_resources(tscm); + } + + if (!amdtp_stream_running(&tscm->tx_stream)) { + amdtp_stream_set_sync(CIP_SYNC_TO_DEVICE, + &tscm->tx_stream, &tscm->rx_stream); + err = keep_resources(tscm, rate); + if (err < 0) + goto error; + + err = set_stream_formats(tscm, rate); + if (err < 0) + goto error; + + err = begin_session(tscm); + if (err < 0) + goto error; + + err = amdtp_stream_start(&tscm->tx_stream, + tscm->tx_resources.channel, + fw_parent_device(tscm->unit)->max_speed); + if (err < 0) + goto error; + + if (!amdtp_stream_wait_callback(&tscm->tx_stream, + CALLBACK_TIMEOUT)) { + err = -ETIMEDOUT; + goto error; + } + } + + if (!amdtp_stream_running(&tscm->rx_stream)) { + err = amdtp_stream_start(&tscm->rx_stream, + tscm->rx_resources.channel, + fw_parent_device(tscm->unit)->max_speed); + if (err < 0) + goto error; + + if (!amdtp_stream_wait_callback(&tscm->rx_stream, + CALLBACK_TIMEOUT)) { + err = -ETIMEDOUT; + goto error; + } + } + + return 0; +error: + amdtp_stream_stop(&tscm->tx_stream); + amdtp_stream_stop(&tscm->rx_stream); + + finish_session(tscm); + release_resources(tscm); + + return err; +} + +void snd_tscm_stream_stop_duplex(struct snd_tscm *tscm) +{ + if (tscm->substreams_counter > 0) + return; + + amdtp_stream_stop(&tscm->tx_stream); + amdtp_stream_stop(&tscm->rx_stream); + + finish_session(tscm); + release_resources(tscm); +} diff --git a/sound/firewire/tascam/tascam.c b/sound/firewire/tascam/tascam.c index d7418c0..c256360 100644 --- a/sound/firewire/tascam/tascam.c +++ b/sound/firewire/tascam/tascam.c @@ -82,6 +82,8 @@ static void tscm_card_free(struct snd_card *card) { struct snd_tscm *tscm = card->private_data; + snd_tscm_stream_destroy_duplex(tscm); + fw_unit_put(tscm->unit); mutex_destroy(&tscm->mutex); @@ -115,6 +117,10 @@ static int snd_tscm_probe(struct fw_unit *unit, snd_tscm_proc_init(tscm); + err = snd_tscm_stream_init_duplex(tscm); + if (err < 0) + goto error; + err = snd_card_register(card); if (err < 0) goto error; @@ -129,7 +135,11 @@ error: static void snd_tscm_update(struct fw_unit *unit) { - return; + struct snd_tscm *tscm = dev_get_drvdata(&unit->device); + + mutex_lock(&tscm->mutex); + snd_tscm_stream_update_duplex(tscm); + mutex_unlock(&tscm->mutex); } static void snd_tscm_remove(struct fw_unit *unit) diff --git a/sound/firewire/tascam/tascam.h b/sound/firewire/tascam/tascam.h index 195be0b..41fe3a9 100644 --- a/sound/firewire/tascam/tascam.h +++ b/sound/firewire/tascam/tascam.h @@ -26,6 +26,7 @@ #include "../lib.h" #include "../amdtp-stream.h" +#include "../iso-resources.h" struct snd_tscm_spec { const char *const name; @@ -45,6 +46,12 @@ struct snd_tscm { struct mutex mutex; const struct snd_tscm_spec *spec; + + struct fw_iso_resources tx_resources; + struct fw_iso_resources rx_resources; + struct amdtp_stream tx_stream; + struct amdtp_stream rx_stream; + unsigned int substreams_counter; }; #define TSCM_ADDR_BASE 0xffff00000000ull @@ -54,6 +61,26 @@ struct snd_tscm { #define TSCM_OFFSET_FIRMWARE_ARM 0x0008 #define TSCM_OFFSET_FIRMWARE_HW 0x000c +#define TSCM_OFFSET_ISOC_TX_CH 0x0200 +#define TSCM_OFFSET_UNKNOWN 0x0204 +#define TSCM_OFFSET_START_STREAMING 0x0208 +#define TSCM_OFFSET_ISOC_RX_CH 0x020c +#define TSCM_OFFSET_ISOC_RX_ON 0x0210 /* Little conviction. */ +#define TSCM_OFFSET_TX_PCM_CHANNELS 0x0214 +#define TSCM_OFFSET_RX_PCM_CHANNELS 0x0218 +#define TSCM_OFFSET_MULTIPLEX_MODE 0x021c +#define TSCM_OFFSET_ISOC_TX_ON 0x0220 +/* Unknown 0x0224 */ +#define TSCM_OFFSET_CLOCK_STATUS 0x0228 +#define TSCM_OFFSET_SET_OPTION 0x022c + +enum snd_tscm_clock { + SND_TSCM_CLOCK_INTERNAL = 0, + SND_TSCM_CLOCK_WORD = 1, + SND_TSCM_CLOCK_SPDIF = 2, + SND_TSCM_CLOCK_ADAT = 3, +}; + int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit, enum amdtp_stream_direction dir, unsigned int pcm_channels); int amdtp_tscm_set_parameters(struct amdtp_stream *s, unsigned int rate); @@ -61,6 +88,15 @@ int amdtp_tscm_add_pcm_hw_constraints(struct amdtp_stream *s, struct snd_pcm_runtime *runtime); void amdtp_tscm_set_pcm_format(struct amdtp_stream *s, snd_pcm_format_t format); +int snd_tscm_stream_get_rate(struct snd_tscm *tscm, unsigned int *rate); +int snd_tscm_stream_get_clock(struct snd_tscm *tscm, + enum snd_tscm_clock *clock); +int snd_tscm_stream_init_duplex(struct snd_tscm *tscm); +void snd_tscm_stream_update_duplex(struct snd_tscm *tscm); +void snd_tscm_stream_destroy_duplex(struct snd_tscm *tscm); +int snd_tscm_stream_start_duplex(struct snd_tscm *tscm, unsigned int rate); +void snd_tscm_stream_stop_duplex(struct snd_tscm *tscm); + void snd_tscm_proc_init(struct snd_tscm *tscm); #endif |
