mirror of https://gitee.com/openkylin/linux.git
544 lines
14 KiB
C
544 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* hdac-ext-stream.c - HD-audio extended stream operations.
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*
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* Copyright (C) 2015 Intel Corp
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* Author: Jeeja KP <jeeja.kp@intel.com>
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <sound/pcm.h>
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#include <sound/hda_register.h>
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#include <sound/hdaudio_ext.h>
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/**
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* snd_hdac_ext_stream_init - initialize each stream (aka device)
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* @bus: HD-audio core bus
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* @stream: HD-audio ext core stream object to initialize
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* @idx: stream index number
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* @direction: stream direction (SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE)
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* @tag: the tag id to assign
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*
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* initialize the stream, if ppcap is enabled then init those and then
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* invoke hdac stream initialization routine
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*/
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void snd_hdac_ext_stream_init(struct hdac_bus *bus,
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struct hdac_ext_stream *stream,
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int idx, int direction, int tag)
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{
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if (bus->ppcap) {
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stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
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AZX_PPHC_INTERVAL * idx;
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stream->pplc_addr = bus->ppcap + AZX_PPLC_BASE +
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AZX_PPLC_MULTI * bus->num_streams +
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AZX_PPLC_INTERVAL * idx;
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}
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if (bus->spbcap) {
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stream->spib_addr = bus->spbcap + AZX_SPB_BASE +
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AZX_SPB_INTERVAL * idx +
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AZX_SPB_SPIB;
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stream->fifo_addr = bus->spbcap + AZX_SPB_BASE +
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AZX_SPB_INTERVAL * idx +
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AZX_SPB_MAXFIFO;
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}
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if (bus->drsmcap)
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stream->dpibr_addr = bus->drsmcap + AZX_DRSM_BASE +
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AZX_DRSM_INTERVAL * idx;
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stream->decoupled = false;
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snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
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/**
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* snd_hdac_ext_stream_init_all - create and initialize the stream objects
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* for an extended hda bus
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* @bus: HD-audio core bus
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* @start_idx: start index for streams
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* @num_stream: number of streams to initialize
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* @dir: direction of streams
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*/
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int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
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int num_stream, int dir)
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{
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int stream_tag = 0;
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int i, tag, idx = start_idx;
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for (i = 0; i < num_stream; i++) {
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struct hdac_ext_stream *stream =
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kzalloc(sizeof(*stream), GFP_KERNEL);
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if (!stream)
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return -ENOMEM;
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tag = ++stream_tag;
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snd_hdac_ext_stream_init(bus, stream, idx, dir, tag);
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idx++;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init_all);
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/**
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* snd_hdac_stream_free_all - free hdac extended stream objects
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*
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* @bus: HD-audio core bus
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*/
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void snd_hdac_stream_free_all(struct hdac_bus *bus)
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{
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struct hdac_stream *s, *_s;
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struct hdac_ext_stream *stream;
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list_for_each_entry_safe(s, _s, &bus->stream_list, list) {
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stream = stream_to_hdac_ext_stream(s);
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snd_hdac_ext_stream_decouple(bus, stream, false);
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list_del(&s->list);
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kfree(stream);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_free_all);
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/**
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* snd_hdac_ext_stream_decouple - decouple the hdac stream
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* @bus: HD-audio core bus
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* @stream: HD-audio ext core stream object to initialize
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* @decouple: flag to decouple
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*/
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void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,
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struct hdac_ext_stream *stream, bool decouple)
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{
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struct hdac_stream *hstream = &stream->hstream;
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u32 val;
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int mask = AZX_PPCTL_PROCEN(hstream->index);
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spin_lock_irq(&bus->reg_lock);
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val = readw(bus->ppcap + AZX_REG_PP_PPCTL) & mask;
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if (decouple && !val)
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snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, mask);
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else if (!decouple && val)
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snd_hdac_updatel(bus->ppcap, AZX_REG_PP_PPCTL, mask, 0);
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stream->decoupled = decouple;
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spin_unlock_irq(&bus->reg_lock);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_decouple);
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/**
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* snd_hdac_ext_linkstream_start - start a stream
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* @stream: HD-audio ext core stream to start
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*/
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void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *stream)
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{
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snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL,
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AZX_PPLCCTL_RUN, AZX_PPLCCTL_RUN);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_start);
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/**
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* snd_hdac_ext_link_stream_clear - stop a stream DMA
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* @stream: HD-audio ext core stream to stop
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*/
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void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *stream)
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{
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snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL, AZX_PPLCCTL_RUN, 0);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_clear);
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/**
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* snd_hdac_ext_link_stream_reset - reset a stream
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* @stream: HD-audio ext core stream to reset
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*/
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void snd_hdac_ext_link_stream_reset(struct hdac_ext_stream *stream)
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{
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unsigned char val;
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int timeout;
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snd_hdac_ext_link_stream_clear(stream);
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snd_hdac_updatel(stream->pplc_addr, AZX_REG_PPLCCTL,
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AZX_PPLCCTL_STRST, AZX_PPLCCTL_STRST);
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udelay(3);
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timeout = 50;
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do {
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val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) &
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AZX_PPLCCTL_STRST;
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if (val)
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break;
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udelay(3);
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} while (--timeout);
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val &= ~AZX_PPLCCTL_STRST;
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writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
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udelay(3);
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timeout = 50;
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/* waiting for hardware to report that the stream is out of reset */
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do {
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val = readl(stream->pplc_addr + AZX_REG_PPLCCTL) & AZX_PPLCCTL_STRST;
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if (!val)
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break;
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udelay(3);
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} while (--timeout);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_reset);
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/**
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* snd_hdac_ext_link_stream_setup - set up the SD for streaming
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* @stream: HD-audio ext core stream to set up
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* @fmt: stream format
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*/
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int snd_hdac_ext_link_stream_setup(struct hdac_ext_stream *stream, int fmt)
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{
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struct hdac_stream *hstream = &stream->hstream;
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unsigned int val;
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/* make sure the run bit is zero for SD */
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snd_hdac_ext_link_stream_clear(stream);
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/* program the stream_tag */
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val = readl(stream->pplc_addr + AZX_REG_PPLCCTL);
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val = (val & ~AZX_PPLCCTL_STRM_MASK) |
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(hstream->stream_tag << AZX_PPLCCTL_STRM_SHIFT);
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writel(val, stream->pplc_addr + AZX_REG_PPLCCTL);
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/* program the stream format */
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writew(fmt, stream->pplc_addr + AZX_REG_PPLCFMT);
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_stream_setup);
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/**
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* snd_hdac_ext_link_set_stream_id - maps stream id to link output
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* @link: HD-audio ext link to set up
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* @stream: stream id
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*/
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void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
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int stream)
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{
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snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 1 << stream);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_set_stream_id);
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/**
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* snd_hdac_ext_link_clear_stream_id - maps stream id to link output
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* @link: HD-audio ext link to set up
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* @stream: stream id
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*/
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void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
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int stream)
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{
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snd_hdac_updatew(link->ml_addr, AZX_REG_ML_LOSIDV, (1 << stream), 0);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_link_clear_stream_id);
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static struct hdac_ext_stream *
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hdac_ext_link_stream_assign(struct hdac_bus *bus,
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struct snd_pcm_substream *substream)
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{
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struct hdac_ext_stream *res = NULL;
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struct hdac_stream *stream = NULL;
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if (!bus->ppcap) {
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dev_err(bus->dev, "stream type not supported\n");
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return NULL;
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}
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list_for_each_entry(stream, &bus->stream_list, list) {
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struct hdac_ext_stream *hstream = container_of(stream,
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struct hdac_ext_stream,
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hstream);
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if (stream->direction != substream->stream)
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continue;
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/* check if decoupled stream and not in use is available */
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if (hstream->decoupled && !hstream->link_locked) {
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res = hstream;
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break;
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}
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if (!hstream->link_locked) {
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snd_hdac_ext_stream_decouple(bus, hstream, true);
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res = hstream;
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break;
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}
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}
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if (res) {
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spin_lock_irq(&bus->reg_lock);
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res->link_locked = 1;
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res->link_substream = substream;
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spin_unlock_irq(&bus->reg_lock);
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}
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return res;
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}
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static struct hdac_ext_stream *
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hdac_ext_host_stream_assign(struct hdac_bus *bus,
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struct snd_pcm_substream *substream)
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{
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struct hdac_ext_stream *res = NULL;
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struct hdac_stream *stream = NULL;
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if (!bus->ppcap) {
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dev_err(bus->dev, "stream type not supported\n");
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return NULL;
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}
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list_for_each_entry(stream, &bus->stream_list, list) {
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struct hdac_ext_stream *hstream = container_of(stream,
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struct hdac_ext_stream,
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hstream);
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if (stream->direction != substream->stream)
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continue;
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if (!stream->opened) {
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if (!hstream->decoupled)
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snd_hdac_ext_stream_decouple(bus, hstream, true);
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res = hstream;
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break;
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}
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}
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if (res) {
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spin_lock_irq(&bus->reg_lock);
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res->hstream.opened = 1;
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res->hstream.running = 0;
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res->hstream.substream = substream;
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spin_unlock_irq(&bus->reg_lock);
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}
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return res;
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}
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/**
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* snd_hdac_ext_stream_assign - assign a stream for the PCM
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* @bus: HD-audio core bus
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* @substream: PCM substream to assign
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* @type: type of stream (coupled, host or link stream)
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*
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* This assigns the stream based on the type (coupled/host/link), for the
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* given PCM substream, assigns it and returns the stream object
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*
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* coupled: Looks for an unused stream
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* host: Looks for an unused decoupled host stream
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* link: Looks for an unused decoupled link stream
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*
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* If no stream is free, returns NULL. The function tries to keep using
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* the same stream object when it's used beforehand. when a stream is
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* decoupled, it becomes a host stream and link stream.
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*/
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struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
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struct snd_pcm_substream *substream,
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int type)
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{
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struct hdac_ext_stream *hstream = NULL;
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struct hdac_stream *stream = NULL;
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switch (type) {
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case HDAC_EXT_STREAM_TYPE_COUPLED:
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stream = snd_hdac_stream_assign(bus, substream);
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if (stream)
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hstream = container_of(stream,
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struct hdac_ext_stream, hstream);
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return hstream;
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case HDAC_EXT_STREAM_TYPE_HOST:
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return hdac_ext_host_stream_assign(bus, substream);
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case HDAC_EXT_STREAM_TYPE_LINK:
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return hdac_ext_link_stream_assign(bus, substream);
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default:
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return NULL;
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_assign);
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/**
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* snd_hdac_ext_stream_release - release the assigned stream
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* @stream: HD-audio ext core stream to release
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* @type: type of stream (coupled, host or link stream)
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*
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* Release the stream that has been assigned by snd_hdac_ext_stream_assign().
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*/
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void snd_hdac_ext_stream_release(struct hdac_ext_stream *stream, int type)
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{
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struct hdac_bus *bus = stream->hstream.bus;
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switch (type) {
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case HDAC_EXT_STREAM_TYPE_COUPLED:
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snd_hdac_stream_release(&stream->hstream);
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break;
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case HDAC_EXT_STREAM_TYPE_HOST:
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if (stream->decoupled && !stream->link_locked)
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snd_hdac_ext_stream_decouple(bus, stream, false);
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snd_hdac_stream_release(&stream->hstream);
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break;
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case HDAC_EXT_STREAM_TYPE_LINK:
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if (stream->decoupled && !stream->hstream.opened)
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snd_hdac_ext_stream_decouple(bus, stream, false);
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spin_lock_irq(&bus->reg_lock);
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stream->link_locked = 0;
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stream->link_substream = NULL;
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spin_unlock_irq(&bus->reg_lock);
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break;
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default:
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dev_dbg(bus->dev, "Invalid type %d\n", type);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
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/**
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* snd_hdac_ext_stream_spbcap_enable - enable SPIB for a stream
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* @bus: HD-audio core bus
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* @enable: flag to enable/disable SPIB
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* @index: stream index for which SPIB need to be enabled
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*/
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void snd_hdac_ext_stream_spbcap_enable(struct hdac_bus *bus,
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bool enable, int index)
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{
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u32 mask = 0;
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if (!bus->spbcap) {
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dev_err(bus->dev, "Address of SPB capability is NULL\n");
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return;
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}
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mask |= (1 << index);
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if (enable)
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snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, mask);
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else
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snd_hdac_updatel(bus->spbcap, AZX_REG_SPB_SPBFCCTL, mask, 0);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_spbcap_enable);
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/**
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* snd_hdac_ext_stream_set_spib - sets the spib value of a stream
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* @bus: HD-audio core bus
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* @stream: hdac_ext_stream
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* @value: spib value to set
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*/
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int snd_hdac_ext_stream_set_spib(struct hdac_bus *bus,
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struct hdac_ext_stream *stream, u32 value)
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{
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if (!bus->spbcap) {
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dev_err(bus->dev, "Address of SPB capability is NULL\n");
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return -EINVAL;
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}
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writel(value, stream->spib_addr);
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_spib);
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/**
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* snd_hdac_ext_stream_get_spbmaxfifo - gets the spib value of a stream
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* @bus: HD-audio core bus
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* @stream: hdac_ext_stream
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*
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* Return maxfifo for the stream
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*/
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int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_bus *bus,
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struct hdac_ext_stream *stream)
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{
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if (!bus->spbcap) {
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dev_err(bus->dev, "Address of SPB capability is NULL\n");
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return -EINVAL;
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}
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return readl(stream->fifo_addr);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_get_spbmaxfifo);
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/**
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* snd_hdac_ext_stop_streams - stop all stream if running
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* @bus: HD-audio core bus
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*/
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void snd_hdac_ext_stop_streams(struct hdac_bus *bus)
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{
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struct hdac_stream *stream;
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if (bus->chip_init) {
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list_for_each_entry(stream, &bus->stream_list, list)
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snd_hdac_stream_stop(stream);
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snd_hdac_bus_stop_chip(bus);
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams);
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/**
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* snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream
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* @bus: HD-audio core bus
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* @enable: flag to enable/disable DRSM
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* @index: stream index for which DRSM need to be enabled
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*/
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void snd_hdac_ext_stream_drsm_enable(struct hdac_bus *bus,
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bool enable, int index)
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{
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u32 mask = 0;
|
|
|
|
if (!bus->drsmcap) {
|
|
dev_err(bus->dev, "Address of DRSM capability is NULL\n");
|
|
return;
|
|
}
|
|
|
|
mask |= (1 << index);
|
|
|
|
if (enable)
|
|
snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, mask);
|
|
else
|
|
snd_hdac_updatel(bus->drsmcap, AZX_REG_DRSM_CTL, mask, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable);
|
|
|
|
/**
|
|
* snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream
|
|
* @bus: HD-audio core bus
|
|
* @stream: hdac_ext_stream
|
|
* @value: dpib value to set
|
|
*/
|
|
int snd_hdac_ext_stream_set_dpibr(struct hdac_bus *bus,
|
|
struct hdac_ext_stream *stream, u32 value)
|
|
{
|
|
|
|
if (!bus->drsmcap) {
|
|
dev_err(bus->dev, "Address of DRSM capability is NULL\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
writel(value, stream->dpibr_addr);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr);
|
|
|
|
/**
|
|
* snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream
|
|
* @bus: HD-audio core bus
|
|
* @stream: hdac_ext_stream
|
|
* @value: lpib value to set
|
|
*/
|
|
int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value)
|
|
{
|
|
snd_hdac_stream_writel(&stream->hstream, SD_LPIB, value);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib);
|