2018-04-26 13:08:08 +00:00
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// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
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// Copyright(c) 2015-18 Intel Corporation.
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/*
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* stream.c - SoundWire Bus stream operations.
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/slab.h>
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#include <linux/soundwire/sdw.h>
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#include "bus.h"
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/**
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* sdw_release_stream() - Free the assigned stream runtime
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*
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* @stream: SoundWire stream runtime
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*
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* sdw_release_stream should be called only once per stream
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*/
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void sdw_release_stream(struct sdw_stream_runtime *stream)
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{
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kfree(stream);
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}
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EXPORT_SYMBOL(sdw_release_stream);
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/**
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* sdw_alloc_stream() - Allocate and return stream runtime
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*
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* @stream_name: SoundWire stream name
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*
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* Allocates a SoundWire stream runtime instance.
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* sdw_alloc_stream should be called only once per stream. Typically
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* invoked from ALSA/ASoC machine/platform driver.
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*/
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struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name)
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{
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struct sdw_stream_runtime *stream;
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stream = kzalloc(sizeof(*stream), GFP_KERNEL);
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if (!stream)
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return NULL;
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stream->name = stream_name;
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stream->state = SDW_STREAM_ALLOCATED;
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return stream;
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}
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EXPORT_SYMBOL(sdw_alloc_stream);
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/**
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* sdw_alloc_master_rt() - Allocates and initialize Master runtime handle
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*
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* @bus: SDW bus instance
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* @stream_config: Stream configuration
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* @stream: Stream runtime handle.
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*
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* This function is to be called with bus_lock held.
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*/
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static struct sdw_master_runtime
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*sdw_alloc_master_rt(struct sdw_bus *bus,
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struct sdw_stream_config *stream_config,
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struct sdw_stream_runtime *stream)
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{
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struct sdw_master_runtime *m_rt;
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m_rt = stream->m_rt;
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/*
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* check if Master is already allocated (as a result of Slave adding
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* it first), if so skip allocation and go to configure
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*/
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if (m_rt)
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goto stream_config;
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m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL);
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if (!m_rt)
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return NULL;
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/* Initialization of Master runtime handle */
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2018-04-26 13:08:13 +00:00
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INIT_LIST_HEAD(&m_rt->port_list);
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2018-04-26 13:08:08 +00:00
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INIT_LIST_HEAD(&m_rt->slave_rt_list);
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stream->m_rt = m_rt;
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list_add_tail(&m_rt->bus_node, &bus->m_rt_list);
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stream_config:
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m_rt->ch_count = stream_config->ch_count;
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m_rt->bus = bus;
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m_rt->stream = stream;
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m_rt->direction = stream_config->direction;
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return m_rt;
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}
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/**
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* sdw_alloc_slave_rt() - Allocate and initialize Slave runtime handle.
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*
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* @slave: Slave handle
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* @stream_config: Stream configuration
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* @stream: Stream runtime handle
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*
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* This function is to be called with bus_lock held.
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*/
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static struct sdw_slave_runtime
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*sdw_alloc_slave_rt(struct sdw_slave *slave,
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struct sdw_stream_config *stream_config,
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struct sdw_stream_runtime *stream)
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{
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struct sdw_slave_runtime *s_rt = NULL;
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s_rt = kzalloc(sizeof(*s_rt), GFP_KERNEL);
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if (!s_rt)
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return NULL;
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2018-04-26 13:08:13 +00:00
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INIT_LIST_HEAD(&s_rt->port_list);
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2018-04-26 13:08:08 +00:00
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s_rt->ch_count = stream_config->ch_count;
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s_rt->direction = stream_config->direction;
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s_rt->slave = slave;
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return s_rt;
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}
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2018-04-26 13:08:13 +00:00
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static void sdw_master_port_release(struct sdw_bus *bus,
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struct sdw_master_runtime *m_rt)
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{
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struct sdw_port_runtime *p_rt, *_p_rt;
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list_for_each_entry_safe(p_rt, _p_rt,
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&m_rt->port_list, port_node) {
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list_del(&p_rt->port_node);
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kfree(p_rt);
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}
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}
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static void sdw_slave_port_release(struct sdw_bus *bus,
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struct sdw_slave *slave,
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struct sdw_stream_runtime *stream)
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{
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struct sdw_port_runtime *p_rt, *_p_rt;
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struct sdw_master_runtime *m_rt = stream->m_rt;
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struct sdw_slave_runtime *s_rt;
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list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
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if (s_rt->slave != slave)
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continue;
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list_for_each_entry_safe(p_rt, _p_rt,
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&s_rt->port_list, port_node) {
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list_del(&p_rt->port_node);
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kfree(p_rt);
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}
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}
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}
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2018-04-26 13:08:08 +00:00
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/**
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* sdw_release_slave_stream() - Free Slave(s) runtime handle
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*
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* @slave: Slave handle.
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* @stream: Stream runtime handle.
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*
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* This function is to be called with bus_lock held.
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*/
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static void sdw_release_slave_stream(struct sdw_slave *slave,
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struct sdw_stream_runtime *stream)
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{
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struct sdw_slave_runtime *s_rt, *_s_rt;
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struct sdw_master_runtime *m_rt = stream->m_rt;
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/* Retrieve Slave runtime handle */
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list_for_each_entry_safe(s_rt, _s_rt,
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&m_rt->slave_rt_list, m_rt_node) {
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if (s_rt->slave == slave) {
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list_del(&s_rt->m_rt_node);
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kfree(s_rt);
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return;
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}
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}
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}
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/**
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* sdw_release_master_stream() - Free Master runtime handle
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*
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* @stream: Stream runtime handle.
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*
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* This function is to be called with bus_lock held
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* It frees the Master runtime handle and associated Slave(s) runtime
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* handle. If this is called first then sdw_release_slave_stream() will have
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* no effect as Slave(s) runtime handle would already be freed up.
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*/
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static void sdw_release_master_stream(struct sdw_stream_runtime *stream)
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{
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struct sdw_master_runtime *m_rt = stream->m_rt;
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struct sdw_slave_runtime *s_rt, *_s_rt;
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list_for_each_entry_safe(s_rt, _s_rt,
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&m_rt->slave_rt_list, m_rt_node)
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sdw_stream_remove_slave(s_rt->slave, stream);
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list_del(&m_rt->bus_node);
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}
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/**
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* sdw_stream_remove_master() - Remove master from sdw_stream
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*
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* @bus: SDW Bus instance
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* @stream: SoundWire stream
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*
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2018-04-26 13:08:13 +00:00
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* This removes and frees port_rt and master_rt from a stream
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2018-04-26 13:08:08 +00:00
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*/
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int sdw_stream_remove_master(struct sdw_bus *bus,
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struct sdw_stream_runtime *stream)
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{
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mutex_lock(&bus->bus_lock);
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sdw_release_master_stream(stream);
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2018-04-26 13:08:13 +00:00
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sdw_master_port_release(bus, stream->m_rt);
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2018-04-26 13:08:08 +00:00
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stream->state = SDW_STREAM_RELEASED;
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kfree(stream->m_rt);
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stream->m_rt = NULL;
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mutex_unlock(&bus->bus_lock);
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return 0;
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}
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EXPORT_SYMBOL(sdw_stream_remove_master);
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/**
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* sdw_stream_remove_slave() - Remove slave from sdw_stream
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*
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* @slave: SDW Slave instance
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* @stream: SoundWire stream
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*
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2018-04-26 13:08:13 +00:00
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* This removes and frees port_rt and slave_rt from a stream
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2018-04-26 13:08:08 +00:00
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*/
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int sdw_stream_remove_slave(struct sdw_slave *slave,
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struct sdw_stream_runtime *stream)
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{
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mutex_lock(&slave->bus->bus_lock);
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2018-04-26 13:08:13 +00:00
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sdw_slave_port_release(slave->bus, slave, stream);
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2018-04-26 13:08:08 +00:00
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sdw_release_slave_stream(slave, stream);
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mutex_unlock(&slave->bus->bus_lock);
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return 0;
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}
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EXPORT_SYMBOL(sdw_stream_remove_slave);
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/**
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* sdw_config_stream() - Configure the allocated stream
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*
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* @dev: SDW device
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* @stream: SoundWire stream
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* @stream_config: Stream configuration for audio stream
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* @is_slave: is API called from Slave or Master
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*
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* This function is to be called with bus_lock held.
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*/
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static int sdw_config_stream(struct device *dev,
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struct sdw_stream_runtime *stream,
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struct sdw_stream_config *stream_config, bool is_slave)
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{
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/*
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* Update the stream rate, channel and bps based on data
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* source. For more than one data source (multilink),
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* match the rate, bps, stream type and increment number of channels.
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*
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* If rate/bps is zero, it means the values are not set, so skip
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* comparison and allow the value to be set and stored in stream
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*/
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if (stream->params.rate &&
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stream->params.rate != stream_config->frame_rate) {
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dev_err(dev, "rate not matching, stream:%s", stream->name);
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return -EINVAL;
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}
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if (stream->params.bps &&
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stream->params.bps != stream_config->bps) {
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dev_err(dev, "bps not matching, stream:%s", stream->name);
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return -EINVAL;
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}
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stream->type = stream_config->type;
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stream->params.rate = stream_config->frame_rate;
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stream->params.bps = stream_config->bps;
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/* TODO: Update this check during Device-device support */
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if (is_slave)
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stream->params.ch_count += stream_config->ch_count;
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return 0;
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}
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2018-04-26 13:08:13 +00:00
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static int sdw_is_valid_port_range(struct device *dev,
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struct sdw_port_runtime *p_rt)
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{
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if (!SDW_VALID_PORT_RANGE(p_rt->num)) {
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dev_err(dev,
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"SoundWire: Invalid port number :%d", p_rt->num);
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return -EINVAL;
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}
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return 0;
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}
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static struct sdw_port_runtime *sdw_port_alloc(struct device *dev,
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struct sdw_port_config *port_config,
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int port_index)
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{
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struct sdw_port_runtime *p_rt;
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p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL);
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if (!p_rt)
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return NULL;
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p_rt->ch_mask = port_config[port_index].ch_mask;
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p_rt->num = port_config[port_index].num;
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return p_rt;
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}
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static int sdw_master_port_config(struct sdw_bus *bus,
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struct sdw_master_runtime *m_rt,
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struct sdw_port_config *port_config,
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unsigned int num_ports)
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{
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struct sdw_port_runtime *p_rt;
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int i;
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/* Iterate for number of ports to perform initialization */
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for (i = 0; i < num_ports; i++) {
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p_rt = sdw_port_alloc(bus->dev, port_config, i);
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if (!p_rt)
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return -ENOMEM;
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/*
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* TODO: Check port capabilities for requested
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* configuration (audio mode support)
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*/
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list_add_tail(&p_rt->port_node, &m_rt->port_list);
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}
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return 0;
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}
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static int sdw_slave_port_config(struct sdw_slave *slave,
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struct sdw_slave_runtime *s_rt,
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struct sdw_port_config *port_config,
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unsigned int num_config)
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{
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struct sdw_port_runtime *p_rt;
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int i, ret;
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/* Iterate for number of ports to perform initialization */
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for (i = 0; i < num_config; i++) {
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p_rt = sdw_port_alloc(&slave->dev, port_config, i);
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if (!p_rt)
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return -ENOMEM;
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/*
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* TODO: Check valid port range as defined by DisCo/
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* slave
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*/
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ret = sdw_is_valid_port_range(&slave->dev, p_rt);
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if (ret < 0) {
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kfree(p_rt);
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return ret;
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|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* TODO: Check port capabilities for requested
|
|
|
|
* configuration (audio mode support)
|
|
|
|
*/
|
|
|
|
|
|
|
|
list_add_tail(&p_rt->port_node, &s_rt->port_list);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-04-26 13:08:08 +00:00
|
|
|
/**
|
|
|
|
* sdw_stream_add_master() - Allocate and add master runtime to a stream
|
|
|
|
*
|
|
|
|
* @bus: SDW Bus instance
|
|
|
|
* @stream_config: Stream configuration for audio stream
|
2018-04-26 13:08:13 +00:00
|
|
|
* @port_config: Port configuration for audio stream
|
|
|
|
* @num_ports: Number of ports
|
2018-04-26 13:08:08 +00:00
|
|
|
* @stream: SoundWire stream
|
|
|
|
*/
|
|
|
|
int sdw_stream_add_master(struct sdw_bus *bus,
|
|
|
|
struct sdw_stream_config *stream_config,
|
2018-04-26 13:08:13 +00:00
|
|
|
struct sdw_port_config *port_config,
|
|
|
|
unsigned int num_ports,
|
2018-04-26 13:08:08 +00:00
|
|
|
struct sdw_stream_runtime *stream)
|
|
|
|
{
|
|
|
|
struct sdw_master_runtime *m_rt = NULL;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&bus->bus_lock);
|
|
|
|
|
|
|
|
m_rt = sdw_alloc_master_rt(bus, stream_config, stream);
|
|
|
|
if (!m_rt) {
|
|
|
|
dev_err(bus->dev,
|
|
|
|
"Master runtime config failed for stream:%s",
|
|
|
|
stream->name);
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = sdw_config_stream(bus->dev, stream, stream_config, false);
|
|
|
|
if (ret)
|
|
|
|
goto stream_error;
|
|
|
|
|
2018-04-26 13:08:13 +00:00
|
|
|
ret = sdw_master_port_config(bus, m_rt, port_config, num_ports);
|
|
|
|
if (ret)
|
|
|
|
goto stream_error;
|
|
|
|
|
2018-04-26 13:08:08 +00:00
|
|
|
stream->state = SDW_STREAM_CONFIGURED;
|
|
|
|
|
|
|
|
stream_error:
|
|
|
|
sdw_release_master_stream(stream);
|
|
|
|
error:
|
|
|
|
mutex_unlock(&bus->bus_lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(sdw_stream_add_master);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream
|
|
|
|
*
|
|
|
|
* @slave: SDW Slave instance
|
|
|
|
* @stream_config: Stream configuration for audio stream
|
|
|
|
* @stream: SoundWire stream
|
2018-04-26 13:08:13 +00:00
|
|
|
* @port_config: Port configuration for audio stream
|
|
|
|
* @num_ports: Number of ports
|
2018-04-26 13:08:08 +00:00
|
|
|
*/
|
|
|
|
int sdw_stream_add_slave(struct sdw_slave *slave,
|
|
|
|
struct sdw_stream_config *stream_config,
|
2018-04-26 13:08:13 +00:00
|
|
|
struct sdw_port_config *port_config,
|
|
|
|
unsigned int num_ports,
|
2018-04-26 13:08:08 +00:00
|
|
|
struct sdw_stream_runtime *stream)
|
|
|
|
{
|
|
|
|
struct sdw_slave_runtime *s_rt;
|
|
|
|
struct sdw_master_runtime *m_rt;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
mutex_lock(&slave->bus->bus_lock);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If this API is invoked by Slave first then m_rt is not valid.
|
|
|
|
* So, allocate m_rt and add Slave to it.
|
|
|
|
*/
|
|
|
|
m_rt = sdw_alloc_master_rt(slave->bus, stream_config, stream);
|
|
|
|
if (!m_rt) {
|
|
|
|
dev_err(&slave->dev,
|
|
|
|
"alloc master runtime failed for stream:%s",
|
|
|
|
stream->name);
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
s_rt = sdw_alloc_slave_rt(slave, stream_config, stream);
|
|
|
|
if (!s_rt) {
|
|
|
|
dev_err(&slave->dev,
|
|
|
|
"Slave runtime config failed for stream:%s",
|
|
|
|
stream->name);
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto stream_error;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = sdw_config_stream(&slave->dev, stream, stream_config, true);
|
|
|
|
if (ret)
|
|
|
|
goto stream_error;
|
|
|
|
|
|
|
|
list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list);
|
|
|
|
|
2018-04-26 13:08:13 +00:00
|
|
|
ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports);
|
|
|
|
if (ret)
|
|
|
|
goto stream_error;
|
|
|
|
|
2018-04-26 13:08:08 +00:00
|
|
|
stream->state = SDW_STREAM_CONFIGURED;
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
stream_error:
|
|
|
|
/*
|
|
|
|
* we hit error so cleanup the stream, release all Slave(s) and
|
|
|
|
* Master runtime
|
|
|
|
*/
|
|
|
|
sdw_release_master_stream(stream);
|
|
|
|
error:
|
|
|
|
mutex_unlock(&slave->bus->bus_lock);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(sdw_stream_add_slave);
|