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|
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
//
// Copyright (c) 2018 BayLibre, SAS.
// Author: Jerome Brunet <jbrunet@baylibre.com>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "axg-tdm.h"
struct axg_card {
struct snd_soc_card card;
void **link_data;
};
struct axg_dai_link_tdm_mask {
u32 tx;
u32 rx;
};
struct axg_dai_link_tdm_data {
unsigned int mclk_fs;
unsigned int slots;
unsigned int slot_width;
u32 *tx_mask;
u32 *rx_mask;
struct axg_dai_link_tdm_mask *codec_masks;
};
/*
* Base params for the codec to codec links
* Those will be over-written by the CPU side of the link
*/
static const struct snd_soc_pcm_stream codec_params = {
.formats = SNDRV_PCM_FMTBIT_S24_LE,
.rate_min = 5525,
.rate_max = 192000,
.channels_min = 1,
.channels_max = 8,
};
#define PREFIX "amlogic,"
static int axg_card_reallocate_links(struct axg_card *priv,
unsigned int num_links)
{
struct snd_soc_dai_link *links;
void **ldata;
links = krealloc(priv->card.dai_link,
num_links * sizeof(*priv->card.dai_link),
GFP_KERNEL | __GFP_ZERO);
ldata = krealloc(priv->link_data,
num_links * sizeof(*priv->link_data),
GFP_KERNEL | __GFP_ZERO);
if (!links || !ldata) {
dev_err(priv->card.dev, "failed to allocate links\n");
return -ENOMEM;
}
priv->card.dai_link = links;
priv->link_data = ldata;
priv->card.num_links = num_links;
return 0;
}
static int axg_card_parse_dai(struct snd_soc_card *card,
struct device_node *node,
struct device_node **dai_of_node,
const char **dai_name)
{
struct of_phandle_args args;
int ret;
if (!dai_name || !dai_of_node || !node)
return -EINVAL;
ret = of_parse_phandle_with_args(node, "sound-dai",
"#sound-dai-cells", 0, &args);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(card->dev, "can't parse dai %d\n", ret);
return ret;
}
*dai_of_node = args.np;
return snd_soc_get_dai_name(&args, dai_name);
}
static int axg_card_set_link_name(struct snd_soc_card *card,
struct snd_soc_dai_link *link,
struct device_node *node,
const char *prefix)
{
char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
prefix, node->full_name);
if (!name)
return -ENOMEM;
link->name = name;
link->stream_name = name;
return 0;
}
static void axg_card_clean_references(struct axg_card *priv)
{
struct snd_soc_card *card = &priv->card;
struct snd_soc_dai_link *link;
struct snd_soc_dai_link_component *codec;
int i, j;
if (card->dai_link) {
for_each_card_prelinks(card, i, link) {
if (link->cpus)
of_node_put(link->cpus->of_node);
for_each_link_codecs(link, j, codec)
of_node_put(codec->of_node);
}
}
if (card->aux_dev) {
for (i = 0; i < card->num_aux_devs; i++)
of_node_put(card->aux_dev[i].dlc.of_node);
}
kfree(card->dai_link);
kfree(priv->link_data);
}
static int axg_card_add_aux_devices(struct snd_soc_card *card)
{
struct device_node *node = card->dev->of_node;
struct snd_soc_aux_dev *aux;
int num, i;
num = of_count_phandle_with_args(node, "audio-aux-devs", NULL);
if (num == -ENOENT) {
/*
* It is ok to have no auxiliary devices but for this card it
* is a strange situtation. Let's warn the about it.
*/
dev_warn(card->dev, "card has no auxiliary devices\n");
return 0;
} else if (num < 0) {
dev_err(card->dev, "error getting auxiliary devices: %d\n",
num);
return num;
}
aux = devm_kcalloc(card->dev, num, sizeof(*aux), GFP_KERNEL);
if (!aux)
return -ENOMEM;
card->aux_dev = aux;
card->num_aux_devs = num;
for (i = 0; i < card->num_aux_devs; i++, aux++) {
aux->dlc.of_node =
of_parse_phandle(node, "audio-aux-devs", i);
if (!aux->dlc.of_node)
return -EINVAL;
}
return 0;
}
static int axg_card_tdm_be_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct axg_card *priv = snd_soc_card_get_drvdata(rtd->card);
struct axg_dai_link_tdm_data *be =
(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
struct snd_soc_dai *codec_dai;
unsigned int mclk;
int ret, i;
if (be->mclk_fs) {
mclk = params_rate(params) * be->mclk_fs;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
SND_SOC_CLOCK_IN);
if (ret && ret != -ENOTSUPP)
return ret;
}
ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, 0, mclk,
SND_SOC_CLOCK_OUT);
if (ret && ret != -ENOTSUPP)
return ret;
}
return 0;
}
static const struct snd_soc_ops axg_card_tdm_be_ops = {
.hw_params = axg_card_tdm_be_hw_params,
};
static int axg_card_tdm_dai_init(struct snd_soc_pcm_runtime *rtd)
{
struct axg_card *priv = snd_soc_card_get_drvdata(rtd->card);
struct axg_dai_link_tdm_data *be =
(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
struct snd_soc_dai *codec_dai;
int ret, i;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_set_tdm_slot(codec_dai,
be->codec_masks[i].tx,
be->codec_masks[i].rx,
be->slots, be->slot_width);
if (ret && ret != -ENOTSUPP) {
dev_err(codec_dai->dev,
"setting tdm link slots failed\n");
return ret;
}
}
ret = axg_tdm_set_tdm_slots(rtd->cpu_dai, be->tx_mask, be->rx_mask,
be->slots, be->slot_width);
if (ret) {
dev_err(rtd->cpu_dai->dev, "setting tdm link slots failed\n");
return ret;
}
return 0;
}
static int axg_card_tdm_dai_lb_init(struct snd_soc_pcm_runtime *rtd)
{
struct axg_card *priv = snd_soc_card_get_drvdata(rtd->card);
struct axg_dai_link_tdm_data *be =
(struct axg_dai_link_tdm_data *)priv->link_data[rtd->num];
int ret;
/* The loopback rx_mask is the pad tx_mask */
ret = axg_tdm_set_tdm_slots(rtd->cpu_dai, NULL, be->tx_mask,
be->slots, be->slot_width);
if (ret) {
dev_err(rtd->cpu_dai->dev, "setting tdm link slots failed\n");
return ret;
}
return 0;
}
static int axg_card_add_tdm_loopback(struct snd_soc_card *card,
int *index)
{
struct axg_card *priv = snd_soc_card_get_drvdata(card);
struct snd_soc_dai_link *pad = &card->dai_link[*index];
struct snd_soc_dai_link *lb;
struct snd_soc_dai_link_component *dlc;
int ret;
/* extend links */
ret = axg_card_reallocate_links(priv, card->num_links + 1);
if (ret)
return ret;
lb = &card->dai_link[*index + 1];
lb->name = kasprintf(GFP_KERNEL, "%s-lb", pad->name);
if (!lb->name)
return -ENOMEM;
dlc = devm_kzalloc(card->dev, 2 * sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
lb->cpus = &dlc[0];
lb->codecs = &dlc[1];
lb->num_cpus = 1;
lb->num_codecs = 1;
lb->stream_name = lb->name;
lb->cpus->of_node = pad->cpus->of_node;
lb->cpus->dai_name = "TDM Loopback";
lb->codecs->name = "snd-soc-dummy";
lb->codecs->dai_name = "snd-soc-dummy-dai";
lb->dpcm_capture = 1;
lb->no_pcm = 1;
lb->ops = &axg_card_tdm_be_ops;
lb->init = axg_card_tdm_dai_lb_init;
/* Provide the same link data to the loopback */
priv->link_data[*index + 1] = priv->link_data[*index];
/*
* axg_card_clean_references() will iterate over this link,
* make sure the node count is balanced
*/
of_node_get(lb->cpus->of_node);
/* Let add_links continue where it should */
*index += 1;
return 0;
}
static unsigned int axg_card_parse_daifmt(struct device_node *node,
struct device_node *cpu_node)
{
struct device_node *bitclkmaster = NULL;
struct device_node *framemaster = NULL;
unsigned int daifmt;
daifmt = snd_soc_of_parse_daifmt(node, PREFIX,
&bitclkmaster, &framemaster);
daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
/* If no master is provided, default to cpu master */
if (!bitclkmaster || bitclkmaster == cpu_node) {
daifmt |= (!framemaster || framemaster == cpu_node) ?
SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
} else {
daifmt |= (!framemaster || framemaster == cpu_node) ?
SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
}
of_node_put(bitclkmaster);
of_node_put(framemaster);
return daifmt;
}
static int axg_card_parse_cpu_tdm_slots(struct snd_soc_card *card,
struct snd_soc_dai_link *link,
struct device_node *node,
struct axg_dai_link_tdm_data *be)
{
char propname[32];
u32 tx, rx;
int i;
be->tx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
sizeof(*be->tx_mask), GFP_KERNEL);
be->rx_mask = devm_kcalloc(card->dev, AXG_TDM_NUM_LANES,
sizeof(*be->rx_mask), GFP_KERNEL);
if (!be->tx_mask || !be->rx_mask)
return -ENOMEM;
for (i = 0, tx = 0; i < AXG_TDM_NUM_LANES; i++) {
snprintf(propname, 32, "dai-tdm-slot-tx-mask-%d", i);
snd_soc_of_get_slot_mask(node, propname, &be->tx_mask[i]);
tx = max(tx, be->tx_mask[i]);
}
/* Disable playback is the interface has no tx slots */
if (!tx)
link->dpcm_playback = 0;
for (i = 0, rx = 0; i < AXG_TDM_NUM_LANES; i++) {
snprintf(propname, 32, "dai-tdm-slot-rx-mask-%d", i);
snd_soc_of_get_slot_mask(node, propname, &be->rx_mask[i]);
rx = max(rx, be->rx_mask[i]);
}
/* Disable capture is the interface has no rx slots */
if (!rx)
link->dpcm_capture = 0;
/* ... but the interface should at least have one of them */
if (!tx && !rx) {
dev_err(card->dev, "tdm link has no cpu slots\n");
return -EINVAL;
}
of_property_read_u32(node, "dai-tdm-slot-num", &be->slots);
if (!be->slots) {
/*
* If the slot number is not provided, set it such as it
* accommodates the largest mask
*/
be->slots = fls(max(tx, rx));
} else if (be->slots < fls(max(tx, rx)) || be->slots > 32) {
/*
* Error if the slots can't accommodate the largest mask or
* if it is just too big
*/
dev_err(card->dev, "bad slot number\n");
return -EINVAL;
}
of_property_read_u32(node, "dai-tdm-slot-width", &be->slot_width);
return 0;
}
static int axg_card_parse_codecs_masks(struct snd_soc_card *card,
struct snd_soc_dai_link *link,
struct device_node *node,
struct axg_dai_link_tdm_data *be)
{
struct axg_dai_link_tdm_mask *codec_mask;
struct device_node *np;
codec_mask = devm_kcalloc(card->dev, link->num_codecs,
sizeof(*codec_mask), GFP_KERNEL);
if (!codec_mask)
return -ENOMEM;
be->codec_masks = codec_mask;
for_each_child_of_node(node, np) {
snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask",
&codec_mask->rx);
snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask",
&codec_mask->tx);
codec_mask++;
}
return 0;
}
static int axg_card_parse_tdm(struct snd_soc_card *card,
struct device_node *node,
int *index)
{
struct axg_card *priv = snd_soc_card_get_drvdata(card);
struct snd_soc_dai_link *link = &card->dai_link[*index];
struct axg_dai_link_tdm_data *be;
int ret;
/* Allocate tdm link parameters */
be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);
if (!be)
return -ENOMEM;
priv->link_data[*index] = be;
/* Setup tdm link */
link->ops = &axg_card_tdm_be_ops;
link->init = axg_card_tdm_dai_init;
link->dai_fmt = axg_card_parse_daifmt(node, link->cpus->of_node);
of_property_read_u32(node, "mclk-fs", &be->mclk_fs);
ret = axg_card_parse_cpu_tdm_slots(card, link, node, be);
if (ret) {
dev_err(card->dev, "error parsing tdm link slots\n");
return ret;
}
ret = axg_card_parse_codecs_masks(card, link, node, be);
if (ret)
return ret;
/* Add loopback if the pad dai has playback */
if (link->dpcm_playback) {
ret = axg_card_add_tdm_loopback(card, index);
if (ret)
return ret;
}
return 0;
}
static int axg_card_set_be_link(struct snd_soc_card *card,
struct snd_soc_dai_link *link,
struct device_node *node)
{
struct snd_soc_dai_link_component *codec;
struct device_node *np;
int ret, num_codecs;
link->no_pcm = 1;
link->dpcm_playback = 1;
link->dpcm_capture = 1;
num_codecs = of_get_child_count(node);
if (!num_codecs) {
dev_err(card->dev, "be link %s has no codec\n",
node->full_name);
return -EINVAL;
}
codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
if (!codec)
return -ENOMEM;
link->codecs = codec;
link->num_codecs = num_codecs;
for_each_child_of_node(node, np) {
ret = axg_card_parse_dai(card, np, &codec->of_node,
&codec->dai_name);
if (ret) {
of_node_put(np);
return ret;
}
codec++;
}
ret = axg_card_set_link_name(card, link, node, "be");
if (ret)
dev_err(card->dev, "error setting %pOFn link name\n", np);
return ret;
}
static int axg_card_set_fe_link(struct snd_soc_card *card,
struct snd_soc_dai_link *link,
struct device_node *node,
bool is_playback)
{
struct snd_soc_dai_link_component *codec;
codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL);
if (!codec)
return -ENOMEM;
link->codecs = codec;
link->num_codecs = 1;
link->dynamic = 1;
link->dpcm_merged_format = 1;
link->dpcm_merged_chan = 1;
link->dpcm_merged_rate = 1;
link->codecs->dai_name = "snd-soc-dummy-dai";
link->codecs->name = "snd-soc-dummy";
if (is_playback)
link->dpcm_playback = 1;
else
link->dpcm_capture = 1;
return axg_card_set_link_name(card, link, node, "fe");
}
static int axg_card_cpu_is_capture_fe(struct device_node *np)
{
return of_device_is_compatible(np, PREFIX "axg-toddr");
}
static int axg_card_cpu_is_playback_fe(struct device_node *np)
{
return of_device_is_compatible(np, PREFIX "axg-frddr");
}
static int axg_card_cpu_is_tdm_iface(struct device_node *np)
{
return of_device_is_compatible(np, PREFIX "axg-tdm-iface");
}
static int axg_card_cpu_is_codec(struct device_node *np)
{
return of_device_is_compatible(np, PREFIX "g12a-tohdmitx");
}
static int axg_card_add_link(struct snd_soc_card *card, struct device_node *np,
int *index)
{
struct snd_soc_dai_link *dai_link = &card->dai_link[*index];
struct snd_soc_dai_link_component *cpu;
int ret;
cpu = devm_kzalloc(card->dev, sizeof(*cpu), GFP_KERNEL);
if (!cpu)
return -ENOMEM;
dai_link->cpus = cpu;
dai_link->num_cpus = 1;
ret = axg_card_parse_dai(card, np, &dai_link->cpus->of_node,
&dai_link->cpus->dai_name);
if (ret)
return ret;
if (axg_card_cpu_is_playback_fe(dai_link->cpus->of_node))
ret = axg_card_set_fe_link(card, dai_link, np, true);
else if (axg_card_cpu_is_capture_fe(dai_link->cpus->of_node))
ret = axg_card_set_fe_link(card, dai_link, np, false);
else
ret = axg_card_set_be_link(card, dai_link, np);
if (ret)
return ret;
if (axg_card_cpu_is_tdm_iface(dai_link->cpus->of_node))
ret = axg_card_parse_tdm(card, np, index);
else if (axg_card_cpu_is_codec(dai_link->cpus->of_node))
dai_link->params = &codec_params;
return ret;
}
static int axg_card_add_links(struct snd_soc_card *card)
{
struct axg_card *priv = snd_soc_card_get_drvdata(card);
struct device_node *node = card->dev->of_node;
struct device_node *np;
int num, i, ret;
num = of_get_child_count(node);
if (!num) {
dev_err(card->dev, "card has no links\n");
return -EINVAL;
}
ret = axg_card_reallocate_links(priv, num);
if (ret)
return ret;
i = 0;
for_each_child_of_node(node, np) {
ret = axg_card_add_link(card, np, &i);
if (ret) {
of_node_put(np);
return ret;
}
i++;
}
return 0;
}
static int axg_card_parse_of_optional(struct snd_soc_card *card,
const char *propname,
int (*func)(struct snd_soc_card *c,
const char *p))
{
/* If property is not provided, don't fail ... */
if (!of_property_read_bool(card->dev->of_node, propname))
return 0;
/* ... but do fail if it is provided and the parsing fails */
return func(card, propname);
}
static const struct of_device_id axg_card_of_match[] = {
{ .compatible = "amlogic,axg-sound-card", },
{}
};
MODULE_DEVICE_TABLE(of, axg_card_of_match);
static int axg_card_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct axg_card *priv;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
platform_set_drvdata(pdev, priv);
snd_soc_card_set_drvdata(&priv->card, priv);
priv->card.owner = THIS_MODULE;
priv->card.dev = dev;
ret = snd_soc_of_parse_card_name(&priv->card, "model");
if (ret < 0)
return ret;
ret = axg_card_parse_of_optional(&priv->card, "audio-routing",
snd_soc_of_parse_audio_routing);
if (ret) {
dev_err(dev, "error while parsing routing\n");
return ret;
}
ret = axg_card_parse_of_optional(&priv->card, "audio-widgets",
snd_soc_of_parse_audio_simple_widgets);
if (ret) {
dev_err(dev, "error while parsing widgets\n");
return ret;
}
ret = axg_card_add_links(&priv->card);
if (ret)
goto out_err;
ret = axg_card_add_aux_devices(&priv->card);
if (ret)
goto out_err;
ret = devm_snd_soc_register_card(dev, &priv->card);
if (ret)
goto out_err;
return 0;
out_err:
axg_card_clean_references(priv);
return ret;
}
static int axg_card_remove(struct platform_device *pdev)
{
struct axg_card *priv = platform_get_drvdata(pdev);
axg_card_clean_references(priv);
return 0;
}
static struct platform_driver axg_card_pdrv = {
.probe = axg_card_probe,
.remove = axg_card_remove,
.driver = {
.name = "axg-sound-card",
.of_match_table = axg_card_of_match,
},
};
module_platform_driver(axg_card_pdrv);
MODULE_DESCRIPTION("Amlogic AXG ALSA machine driver");
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_LICENSE("GPL v2");
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