diff options
Diffstat (limited to 'sound/hda/ext')
| -rw-r--r-- | sound/hda/ext/Makefile | 2 | ||||
| -rw-r--r-- | sound/hda/ext/hdac_ext_stream.c | 402 |
2 files changed, 403 insertions, 1 deletions
diff --git a/sound/hda/ext/Makefile b/sound/hda/ext/Makefile index 934b7bf5d87f..9b6f641c7777 100644 --- a/sound/hda/ext/Makefile +++ b/sound/hda/ext/Makefile @@ -1,3 +1,3 @@ -snd-hda-ext-core-objs := hdac_ext_bus.o hdac_ext_controller.o +snd-hda-ext-core-objs := hdac_ext_bus.o hdac_ext_controller.o hdac_ext_stream.o obj-$(CONFIG_SND_HDA_EXT_CORE) += snd-hda-ext-core.o diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c new file mode 100644 index 000000000000..0677bb65a494 --- /dev/null +++ b/sound/hda/ext/hdac_ext_stream.c @@ -0,0 +1,402 @@ +/* + * hdac-ext-stream.c - HD-audio extended stream operations. + * + * Copyright (C) 2015 Intel Corp + * Author: Jeeja KP <jeeja.kp@intel.com> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include <linux/delay.h> +#include <sound/pcm.h> +#include <sound/hda_register.h> +#include <sound/hdaudio_ext.h> + +/** + * snd_hdac_ext_stream_init - initialize each stream (aka device) + * @ebus: HD-audio ext core bus + * @stream: HD-audio ext core stream object to initialize + * @idx: stream index number + * @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE) + * @tag: the tag id to assign + * + * initialize the stream, if ppcap is enabled then init those and then + * invoke hdac stream initialization routine + */ +void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus, + struct hdac_ext_stream *stream, + int idx, int direction, int tag) +{ + struct hdac_bus *bus = &ebus->bus; + + if (ebus->ppcap) { + stream->pphc_addr = ebus->ppcap + AZX_PPHC_BASE + + AZX_PPHC_INTERVAL * idx; + + stream->pplc_addr = ebus->ppcap + AZX_PPLC_BASE + + AZX_PPLC_MULTI * ebus->num_streams + + AZX_PPLC_INTERVAL * idx; + } + + stream->decoupled = false; + snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init); + +/** + * snd_hdac_ext_stream_decouple - decouple the hdac stream + * @ebus: HD-audio ext core bus + * @stream: HD-audio ext core stream object to initialize + * @decouple: flag to decouple + */ +void snd_hdac_ext_stream_decouple(struct hdac_ext_bus *ebus, + struct hdac_ext_stream *stream, bool decouple) +{ + struct hdac_stream *hstream = &stream->hstream; + struct hdac_bus *bus = &ebus->bus; + + spin_lock_irq(&bus->reg_lock); + if (decouple) + snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, 0, + AZX_PPCTL_PROCEN(hstream->index)); + else + snd_hdac_updatel(ebus->ppcap, AZX_REG_PP_PPCTL, + AZX_PPCTL_PROCEN(hstream->index), 0); + stream->decoupled = decouple; + spin_unlock_irq(&bus->reg_lock); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple); + +/** + * snd_hdac_ext_linkstream_start - start a stream + * @stream: HD-audio ext core stream to start + */ +void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream) +{ + snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_RUN); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start); + +/** + * snd_hdac_ext_link_stream_clear - stop a stream DMA + * @stream: HD-audio ext core stream to stop + */ +void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream) +{ + snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear); + +/** + * snd_hdac_ext_link_stream_reset - reset a stream + * @stream: HD-audio ext core stream to reset + */ +void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream) +{ + unsigned char val; + int timeout; + + snd_hdac_ext_link_stream_clear(stream); + + snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, 0, AZX_PPLCCTL_STRST); + udelay(3); + timeout = 50; + do { + val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & + AZX_PPLCCTL_STRST; + if (val) + break; + udelay(3); + } while (--timeout); + val &= ~AZX_PPLCCTL_STRST; + writel(val, stream->pplc_addr + AZX_REG_PPLCCTL); + udelay(3); + + timeout = 50; + /* waiting for hardware to report that the stream is out of reset */ + do { + val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST; + if (!val) + break; + udelay(3); + } while (--timeout); + +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset); + +/** + * snd_hdac_ext_link_stream_setup - set up the SD for streaming + * @stream: HD-audio ext core stream to set up + * @fmt: stream format + */ +int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt) +{ + struct hdac_stream *hstream = &stream->hstream; + unsigned int val; + + /* make sure the run bit is zero for SD */ + snd_hdac_ext_link_stream_clear(stream); + /* program the stream_tag */ + val = readl(stream->pplc_addr + AZX_REG_PPLCCTL); + val = (val & ~AZX_PPLCCTL_STRM_MASK) | + (hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT); + writel(val, stream->pplc_addr + AZX_REG_PPLCCTL); + + /* program the stream format */ + writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup); + +/** + * snd_hdac_ext_link_set_stream_id - maps stream id to link output + * @link: HD-audio ext link to set up + * @stream: stream id + */ +void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link, + int stream) +{ + snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id); + +/** + * snd_hdac_ext_link_clear_stream_id - maps stream id to link output + * @link: HD-audio ext link to set up + * @stream: stream id + */ +void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link, + int stream) +{ + snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, 0, (1 << stream)); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id); + +static struct hdac_ext_stream * +hdac_ext_link_stream_assign(struct hdac_ext_bus *ebus, + struct snd_pcm_substream *substream) +{ + struct hdac_ext_stream *res = NULL; + struct hdac_stream *stream = NULL; + struct hdac_bus *hbus = &ebus->bus; + + if (!ebus->ppcap) { + dev_err(hbus->dev, "stream type not supported\n"); + return NULL; + } + + list_for_each_entry(stream, &hbus->stream_list, list) { + struct hdac_ext_stream *hstream = container_of(stream, + struct hdac_ext_stream, + hstream); + if (stream->direction != substream->stream) + continue; + + /* check if decoupled stream and not in use is available */ + if (hstream->decoupled && !hstream->link_locked) { + res = hstream; + break; + } + + if (!hstream->link_locked) { + snd_hdac_ext_stream_decouple(ebus, hstream, true); + res = hstream; + break; + } + } + if (res) { + spin_lock_irq(&hbus->reg_lock); + res->link_locked = 1; + res->link_substream = substream; + spin_unlock_irq(&hbus->reg_lock); + } + return res; +} + +static struct hdac_ext_stream * +hdac_ext_host_stream_assign(struct hdac_ext_bus *ebus, + struct snd_pcm_substream *substream) +{ + struct hdac_ext_stream *res = NULL; + struct hdac_stream *stream = NULL; + struct hdac_bus *hbus = &ebus->bus; + int key; + + if (!ebus->ppcap) { + dev_err(hbus->dev, "stream type not supported\n"); + return NULL; + } + + /* make a non-zero unique key for the substream */ + key = (substream->pcm->device << 16) | (substream->number << 2) | + (substream->stream + 1); + + list_for_each_entry(stream, &hbus->stream_list, list) { + struct hdac_ext_stream *hstream = container_of(stream, + struct hdac_ext_stream, + hstream); + if (stream->direction != substream->stream) + continue; + + if (stream->opened) { + if (!hstream->decoupled) + snd_hdac_ext_stream_decouple(ebus, hstream, true); + res = hstream; + break; + } + } + if (res) { + spin_lock_irq(&hbus->reg_lock); + res->hstream.opened = 1; + res->hstream.running = 0; + res->hstream.assigned_key = key; + res->hstream.substream = substream; + spin_unlock_irq(&hbus->reg_lock); + } + + return res; +} + +/** + * snd_hdac_ext_stream_assign - assign a stream for the PCM + * @ebus: HD-audio ext core bus + * @substream: PCM substream to assign + * @type: type of stream (coupled, host or link stream) + * + * This assigns the stream based on the type (coupled/host/link), for the + * given PCM substream, assigns it and returns the stream object + * + * coupled: Looks for an unused stream + * host: Looks for an unused decoupled host stream + * link: Looks for an unused decoupled link stream + * + * If no stream is free, returns NULL. The function tries to keep using + * the same stream object when it's used beforehand. when a stream is + * decoupled, it becomes a host stream and link stream. + */ +struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_ext_bus *ebus, + struct snd_pcm_substream *substream, + int type) +{ + struct hdac_ext_stream *hstream = NULL; + struct hdac_stream *stream = NULL; + struct hdac_bus *hbus = &ebus->bus; + + switch (type) { + case HDAC_EXT_STREAM_TYPE_COUPLED: + stream = snd_hdac_stream_assign(hbus, substream); + if (stream) + hstream = container_of(stream, + struct hdac_ext_stream, hstream); + return hstream; + + case HDAC_EXT_STREAM_TYPE_HOST: + return hdac_ext_host_stream_assign(ebus, substream); + + case HDAC_EXT_STREAM_TYPE_LINK: + return hdac_ext_link_stream_assign(ebus, substream); + + default: + return NULL; + } +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign); + +/** + * snd_hdac_ext_stream_release - release the assigned stream + * @stream: HD-audio ext core stream to release + * @type: type of stream (coupled, host or link stream) + * + * Release the stream that has been assigned by snd_hdac_ext_stream_assign(). + */ +void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type) +{ + struct hdac_bus *bus = stream->hstream.bus; + struct hdac_ext_bus *ebus = hbus_to_ebus(bus); + + switch (type) { + case HDAC_EXT_STREAM_TYPE_COUPLED: + snd_hdac_stream_release(&stream->hstream); + break; + + case HDAC_EXT_STREAM_TYPE_HOST: + if (stream->decoupled) { + snd_hdac_ext_stream_decouple(ebus, stream, false); + snd_hdac_stream_release(&stream->hstream); + } + break; + + case HDAC_EXT_STREAM_TYPE_LINK: + if (stream->decoupled) + snd_hdac_ext_stream_decouple(ebus, stream, false); + spin_lock_irq(&bus->reg_lock); + stream->link_locked = 0; + stream->link_substream = NULL; + spin_unlock_irq(&bus->reg_lock); + break; + + default: + dev_dbg(bus->dev, "Invalid type %d\n", type); + } + +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release); + +/** + * snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream + * @ebus: HD-audio ext core bus + * @enable: flag to enable/disable SPIB + * @index: stream index for which SPIB need to be enabled + */ +void snd_hdac_ext_stream_spbcap_enable(struct hdac_ext_bus *ebus, + bool enable, int index) +{ + u32 mask = 0; + u32 register_mask = 0; + struct hdac_bus *bus = &ebus->bus; + + if (!ebus->spbcap) { + dev_err(bus->dev, "Address of SPB capability is NULL"); + return; + } + + mask |= (1 << index); + + register_mask = snd_hdac_chip_readl(bus, SPB_SPBFCCTL); + + mask |= register_mask; + + if (enable) + snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, 0, mask); + else + snd_hdac_updatel(ebus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable); + +/** + * snd_hdac_ext_stop_streams - stop all stream if running + * @ebus: HD-audio ext core bus + */ +void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus) +{ + struct hdac_bus *bus = ebus_to_hbus(ebus); + struct hdac_stream *stream; + + if (bus->chip_init) { + list_for_each_entry(stream, &bus->stream_list, list) + snd_hdac_stream_stop(stream); + snd_hdac_bus_stop_chip(bus); + } +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams); |