soundwire: cdns: Add stream routines
Add support for Cadence stream initialization and implement stream APIs. Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Vinod Koul
parent
07abeff1ef
commit
5d6b3c8ba1
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@ -13,6 +13,8 @@
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#include <linux/mod_devicetable.h>
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#include <linux/soundwire/sdw_registers.h>
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#include <linux/soundwire/sdw.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include "bus.h"
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#include "cadence_master.h"
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@ -985,5 +987,198 @@ int sdw_cdns_probe(struct sdw_cdns *cdns)
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}
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EXPORT_SYMBOL(sdw_cdns_probe);
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int cdns_set_sdw_stream(struct snd_soc_dai *dai,
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void *stream, bool pcm, int direction)
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{
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struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
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struct sdw_cdns_dma_data *dma;
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dma = kzalloc(sizeof(*dma), GFP_KERNEL);
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if (!dma)
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return -ENOMEM;
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if (pcm)
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dma->stream_type = SDW_STREAM_PCM;
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else
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dma->stream_type = SDW_STREAM_PDM;
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dma->bus = &cdns->bus;
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dma->link_id = cdns->instance;
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dma->stream = stream;
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if (direction == SNDRV_PCM_STREAM_PLAYBACK)
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dai->playback_dma_data = dma;
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else
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dai->capture_dma_data = dma;
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return 0;
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}
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EXPORT_SYMBOL(cdns_set_sdw_stream);
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/**
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* cdns_find_pdi() - Find a free PDI
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*
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* @cdns: Cadence instance
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* @num: Number of PDIs
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* @pdi: PDI instances
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*
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* Find and return a free PDI for a given PDI array
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*/
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static struct sdw_cdns_pdi *cdns_find_pdi(struct sdw_cdns *cdns,
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unsigned int num, struct sdw_cdns_pdi *pdi)
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{
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int i;
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for (i = 0; i < num; i++) {
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if (pdi[i].assigned == true)
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continue;
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pdi[i].assigned = true;
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return &pdi[i];
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}
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return NULL;
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}
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/**
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* sdw_cdns_config_stream: Configure a stream
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*
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* @cdns: Cadence instance
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* @port: Cadence data port
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* @ch: Channel count
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* @dir: Data direction
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* @pdi: PDI to be used
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*/
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void sdw_cdns_config_stream(struct sdw_cdns *cdns,
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struct sdw_cdns_port *port,
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u32 ch, u32 dir, struct sdw_cdns_pdi *pdi)
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{
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u32 offset, val = 0;
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if (dir == SDW_DATA_DIR_RX)
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val = CDNS_PORTCTRL_DIRN;
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offset = CDNS_PORTCTRL + port->num * CDNS_PORT_OFFSET;
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cdns_updatel(cdns, offset, CDNS_PORTCTRL_DIRN, val);
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val = port->num;
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val |= ((1 << ch) - 1) << SDW_REG_SHIFT(CDNS_PDI_CONFIG_CHANNEL);
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cdns_writel(cdns, CDNS_PDI_CONFIG(pdi->num), val);
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}
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EXPORT_SYMBOL(sdw_cdns_config_stream);
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/**
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* cdns_get_num_pdi() - Get number of PDIs required
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*
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* @cdns: Cadence instance
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* @pdi: PDI to be used
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* @num: Number of PDIs
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* @ch_count: Channel count
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*/
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static int cdns_get_num_pdi(struct sdw_cdns *cdns,
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struct sdw_cdns_pdi *pdi,
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unsigned int num, u32 ch_count)
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{
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int i, pdis = 0;
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for (i = 0; i < num; i++) {
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if (pdi[i].assigned == true)
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continue;
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if (pdi[i].ch_count < ch_count)
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ch_count -= pdi[i].ch_count;
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else
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ch_count = 0;
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pdis++;
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if (!ch_count)
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break;
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}
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if (ch_count)
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return 0;
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return pdis;
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}
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/**
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* sdw_cdns_get_stream() - Get stream information
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*
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* @cdns: Cadence instance
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* @stream: Stream to be allocated
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* @ch: Channel count
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* @dir: Data direction
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*/
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int sdw_cdns_get_stream(struct sdw_cdns *cdns,
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struct sdw_cdns_streams *stream,
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u32 ch, u32 dir)
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{
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int pdis = 0;
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if (dir == SDW_DATA_DIR_RX)
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pdis = cdns_get_num_pdi(cdns, stream->in, stream->num_in, ch);
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else
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pdis = cdns_get_num_pdi(cdns, stream->out, stream->num_out, ch);
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/* check if we found PDI, else find in bi-directional */
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if (!pdis)
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pdis = cdns_get_num_pdi(cdns, stream->bd, stream->num_bd, ch);
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return pdis;
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}
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EXPORT_SYMBOL(sdw_cdns_get_stream);
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/**
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* sdw_cdns_alloc_stream() - Allocate a stream
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*
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* @cdns: Cadence instance
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* @stream: Stream to be allocated
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* @port: Cadence data port
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* @ch: Channel count
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* @dir: Data direction
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*/
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int sdw_cdns_alloc_stream(struct sdw_cdns *cdns,
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struct sdw_cdns_streams *stream,
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struct sdw_cdns_port *port, u32 ch, u32 dir)
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{
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struct sdw_cdns_pdi *pdi = NULL;
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if (dir == SDW_DATA_DIR_RX)
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pdi = cdns_find_pdi(cdns, stream->num_in, stream->in);
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else
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pdi = cdns_find_pdi(cdns, stream->num_out, stream->out);
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/* check if we found a PDI, else find in bi-directional */
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if (!pdi)
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pdi = cdns_find_pdi(cdns, stream->num_bd, stream->bd);
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if (!pdi)
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return -EIO;
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port->pdi = pdi;
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pdi->l_ch_num = 0;
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pdi->h_ch_num = ch - 1;
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pdi->dir = dir;
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pdi->ch_count = ch;
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return 0;
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}
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EXPORT_SYMBOL(sdw_cdns_alloc_stream);
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void sdw_cdns_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct sdw_cdns_dma_data *dma;
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dma = snd_soc_dai_get_dma_data(dai, substream);
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if (!dma)
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return;
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snd_soc_dai_set_dma_data(dai, substream, NULL);
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kfree(dma);
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}
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EXPORT_SYMBOL(sdw_cdns_shutdown);
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION("Cadence Soundwire Library");
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@ -1,5 +1,6 @@
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// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
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// Copyright(c) 2015-17 Intel Corporation.
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#include <sound/soc.h>
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#ifndef __SDW_CADENCE_H
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#define __SDW_CADENCE_H
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@ -90,6 +91,26 @@ struct sdw_cdns_stream_config {
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unsigned int pdm_out;
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};
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/**
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* struct sdw_cdns_dma_data: Cadence DMA data
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*
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* @name: SoundWire stream name
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* @nr_ports: Number of ports
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* @port: Ports
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* @bus: Bus handle
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* @stream_type: Stream type
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* @link_id: Master link id
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*/
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struct sdw_cdns_dma_data {
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char *name;
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struct sdw_stream_runtime *stream;
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int nr_ports;
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struct sdw_cdns_port **port;
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struct sdw_bus *bus;
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enum sdw_stream_type stream_type;
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int link_id;
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};
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/**
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* struct sdw_cdns - Cadence driver context
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* @dev: Linux device
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@ -142,6 +163,25 @@ int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
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struct sdw_cdns_stream_config config);
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int sdw_cdns_enable_interrupt(struct sdw_cdns *cdns);
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int sdw_cdns_get_stream(struct sdw_cdns *cdns,
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struct sdw_cdns_streams *stream,
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u32 ch, u32 dir);
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int sdw_cdns_alloc_stream(struct sdw_cdns *cdns,
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struct sdw_cdns_streams *stream,
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struct sdw_cdns_port *port, u32 ch, u32 dir);
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void sdw_cdns_config_stream(struct sdw_cdns *cdns, struct sdw_cdns_port *port,
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u32 ch, u32 dir, struct sdw_cdns_pdi *pdi);
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void sdw_cdns_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai);
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int sdw_cdns_pcm_set_stream(struct snd_soc_dai *dai,
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void *stream, int direction);
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int sdw_cdns_pdm_set_stream(struct snd_soc_dai *dai,
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void *stream, int direction);
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enum sdw_command_response
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cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
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enum sdw_command_response
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cdns_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg);
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@ -153,4 +193,7 @@ enum sdw_command_response
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cdns_reset_page_addr(struct sdw_bus *bus, unsigned int dev_num);
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int cdns_bus_conf(struct sdw_bus *bus, struct sdw_bus_params *params);
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int cdns_set_sdw_stream(struct snd_soc_dai *dai,
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void *stream, bool pcm, int direction);
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#endif /* __SDW_CADENCE_H */
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