// SPDX-License-Identifier: GPL-2.0
/*
* ALSA SoC using the QUICC Multichannel Controller (QMC)
*
* Copyright 2022 CS GROUP France
*
* Author: Herve Codina <[email protected]>
*/
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <soc/fsl/qe/qmc.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
struct qmc_dai_chan {
struct qmc_dai_prtd *prtd_tx;
struct qmc_dai_prtd *prtd_rx;
struct qmc_chan *qmc_chan;
};
struct qmc_dai {
char *name;
int id;
struct device *dev;
unsigned int nb_tx_ts;
unsigned int nb_rx_ts;
unsigned int nb_chans_avail;
unsigned int nb_chans_used_tx;
unsigned int nb_chans_used_rx;
struct qmc_dai_chan *chans;
};
struct qmc_audio {
struct device *dev;
unsigned int num_dais;
struct qmc_dai *dais;
struct snd_soc_dai_driver *dai_drivers;
};
struct qmc_dai_prtd {
struct qmc_dai *qmc_dai;
snd_pcm_uframes_t buffer_ended;
snd_pcm_uframes_t buffer_size;
snd_pcm_uframes_t period_size;
dma_addr_t ch_dma_addr_start;
dma_addr_t ch_dma_addr_current;
dma_addr_t ch_dma_addr_end;
size_t ch_dma_size;
size_t ch_dma_offset;
unsigned int channels;
DECLARE_BITMAP(chans_pending, 64);
struct snd_pcm_substream *substream;
};
static int qmc_audio_pcm_construct(struct snd_soc_component *component,
struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
int ret;
ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, card->dev,
64 * 1024, 64 * 1024);
return 0;
}
static bool qmc_audio_access_is_interleaved(snd_pcm_access_t access)
{
switch (access) {
case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED:
case SNDRV_PCM_ACCESS_RW_INTERLEAVED:
return true;
default:
break;
}
return false;
}
static int qmc_audio_pcm_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct qmc_dai_prtd *prtd = substream->runtime->private_data;
/*
* In interleaved mode, the driver uses one QMC channel for all audio
* channels whereas in non-interleaved mode, it uses one QMC channel per
* audio channel.
*/
prtd->channels = qmc_audio_access_is_interleaved(params_access(params)) ?
1 : params_channels(params);
prtd->substream = substream;
prtd->buffer_ended = 0;
prtd->buffer_size = params_buffer_size(params);
prtd->period_size = params_period_size(params);
prtd->ch_dma_addr_start = runtime->dma_addr;
prtd->ch_dma_offset = params_buffer_bytes(params) / prtd->channels;
prtd->ch_dma_addr_end = runtime->dma_addr + prtd->ch_dma_offset;
prtd->ch_dma_addr_current = prtd->ch_dma_addr_start;
prtd->ch_dma_size = params_period_bytes(params) / prtd->channels;
return 0;
}
static void qmc_audio_pcm_write_complete(void *context);
static int qmc_audio_pcm_write_submit(struct qmc_dai_prtd *prtd)
{
unsigned int i;
int ret;
for (i = 0; i < prtd->channels; i++) {
bitmap_set(prtd->chans_pending, i, 1);
ret = qmc_chan_write_submit(prtd->qmc_dai->chans[i].qmc_chan,
prtd->ch_dma_addr_current + i * prtd->ch_dma_offset,
prtd->ch_dma_size,
qmc_audio_pcm_write_complete,
&prtd->qmc_dai->chans[i]);
if (ret) {
dev_err(prtd->qmc_dai->dev, "write_submit %u failed %d\n",
i, ret);
bitmap_clear(prtd->chans_pending, i, 1);
return ret;
}
}
return 0;
}
static void qmc_audio_pcm_write_complete(void *context)
{
struct qmc_dai_chan *chan = context;
struct qmc_dai_prtd *prtd;
prtd = chan->prtd_tx;
/* Mark the current channel as completed */
bitmap_clear(prtd->chans_pending, chan - prtd->qmc_dai->chans, 1);
/*
* All QMC channels involved must have completed their transfer before
* submitting a new one.
*/
if (!bitmap_empty(prtd->chans_pending, 64))
return;
prtd->buffer_ended += prtd->period_size;
if (prtd->buffer_ended >= prtd->buffer_size)
prtd->buffer_ended = 0;
prtd->ch_dma_addr_current += prtd->ch_dma_size;
if (prtd->ch_dma_addr_current >= prtd->ch_dma_addr_end)
prtd->ch_dma_addr_current = prtd->ch_dma_addr_start;
qmc_audio_pcm_write_submit(prtd);
snd_pcm_period_elapsed(prtd->substream);
}
static void qmc_audio_pcm_read_complete(void *context, size_t length, unsigned int flags);
static int qmc_audio_pcm_read_submit(struct qmc_dai_prtd *prtd)
{
unsigned int i;
int ret;
for (i = 0; i < prtd->channels; i++) {
bitmap_set(prtd->chans_pending, i, 1);
ret = qmc_chan_read_submit(prtd->qmc_dai->chans[i].qmc_chan,
prtd->ch_dma_addr_current + i * prtd->ch_dma_offset,
prtd->ch_dma_size,
qmc_audio_pcm_read_complete,
&prtd->qmc_dai->chans[i]);
if (ret) {
dev_err(prtd->qmc_dai->dev, "read_submit %u failed %d\n",
i, ret);
bitmap_clear(prtd->chans_pending, i, 1);
return ret;
}
}
return 0;
}
static void qmc_audio_pcm_read_complete(void *context, size_t length, unsigned int flags)
{
struct qmc_dai_chan *chan = context;
struct qmc_dai_prtd *prtd;
prtd = chan->prtd_rx;
/* Mark the current channel as completed */
bitmap_clear(prtd->chans_pending, chan - prtd->qmc_dai->chans, 1);
if (length != prtd->ch_dma_size) {
dev_err(prtd->qmc_dai->dev, "read complete length = %zu, exp %zu\n",
length, prtd->ch_dma_size);
}
/*
* All QMC channels involved must have completed their transfer before
* submitting a new one.
*/
if (!bitmap_empty(prtd->chans_pending, 64))
return;
prtd->buffer_ended += prtd->period_size;
if (prtd->buffer_ended >= prtd->buffer_size)
prtd->buffer_ended = 0;
prtd->ch_dma_addr_current += prtd->ch_dma_size;
if (prtd->ch_dma_addr_current >= prtd->ch_dma_addr_end)
prtd->ch_dma_addr_current = prtd->ch_dma_addr_start;
qmc_audio_pcm_read_submit(prtd);
snd_pcm_period_elapsed(prtd->substream);
}
static int qmc_audio_pcm_trigger(struct snd_soc_component *component,
struct snd_pcm_substream *substream, int cmd)
{
struct qmc_dai_prtd *prtd = substream->runtime->private_data;
unsigned int i;
int ret;
if (!prtd->qmc_dai) {
dev_err(component->dev, "qmc_dai is not set\n");
return -EINVAL;
}
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
bitmap_zero(prtd->chans_pending, 64);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
for (i = 0; i < prtd->channels; i++)
prtd->qmc_dai->chans[i].prtd_tx = prtd;
/* Submit first chunk ... */
ret = qmc_audio_pcm_write_submit(prtd);
if (ret)
return ret;
/* ... prepare next one ... */
prtd->ch_dma_addr_current += prtd->ch_dma_size;
if (prtd->ch_dma_addr_current >= prtd->ch_dma_addr_end)
prtd->ch_dma_addr_current = prtd->ch_dma_addr_start;
/* ... and send it */
ret = qmc_audio_pcm_write_submit(prtd);
if (ret)
return ret;
} else {
for (i = 0; i < prtd->channels; i++)
prtd->qmc_dai->chans[i].prtd_rx = prtd;
/* Submit first chunk ... */
ret = qmc_audio_pcm_read_submit(prtd);
if (ret)
return ret;
/* ... prepare next one ... */
prtd->ch_dma_addr_current += prtd->ch_dma_size;
if (prtd->ch_dma_addr_current >= prtd->ch_dma_addr_end)
prtd->ch_dma_addr_current = prtd->ch_dma_addr_start;
/* ... and send it */
ret = qmc_audio_pcm_read_submit(prtd);
if (ret)
return ret;
}
break;
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t qmc_audio_pcm_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct qmc_dai_prtd *prtd = substream->runtime->private_data;
return prtd->buffer_ended;
}
static int qmc_audio_of_xlate_dai_name(struct snd_soc_component *component,
const struct of_phandle_args *args,
const char **dai_name)
{
struct qmc_audio *qmc_audio = dev_get_drvdata(component->dev);
struct snd_soc_dai_driver *dai_driver;
int id = args->args[0];
int i;
for (i = 0; i < qmc_audio->num_dais; i++) {
dai_driver = qmc_audio->dai_drivers + i;
if (dai_driver->id == id) {
*dai_name = dai_driver->name;
return 0;
}
}
return -EINVAL;
}
static const struct snd_pcm_hardware qmc_audio_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_NONINTERLEAVED |
SNDRV_PCM_INFO_PAUSE,
.period_bytes_min = 32,
.period_bytes_max = 64 * 1024,
.periods_min = 2,
.periods_max = 2 * 1024,
.buffer_bytes_max = 64 * 1024,
};
static int qmc_audio_pcm_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct qmc_dai_prtd *prtd;
int ret;
snd_soc_set_runtime_hwparams(substream, &qmc_audio_pcm_hardware);
/* ensure that buffer size is a multiple of period size */
ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
return ret;
prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
if (!prtd)
return -ENOMEM;
runtime->private_data = prtd;
return 0;
}
static int qmc_audio_pcm_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct qmc_dai_prtd *prtd = substream->runtime->private_data;
kfree(prtd);
return 0;
}
static const struct snd_soc_component_driver qmc_audio_soc_platform = {
.open = qmc_audio_pcm_open,
.close = qmc_audio_pcm_close,
.hw_params = qmc_audio_pcm_hw_params,
.trigger = qmc_audio_pcm_trigger,
.pointer = qmc_audio_pcm_pointer,
.pcm_construct = qmc_audio_pcm_construct,
.of_xlate_dai_name = qmc_audio_of_xlate_dai_name,
};
static unsigned int qmc_dai_get_index(struct snd_soc_dai *dai)
{
struct qmc_audio *qmc_audio = snd_soc_dai_get_drvdata(dai);
return dai->driver - qmc_audio->dai_drivers;
}
static struct qmc_dai *qmc_dai_get_data(struct snd_soc_dai *dai)
{
struct qmc_audio *qmc_audio = snd_soc_dai_get_drvdata(dai);
unsigned int index;
index = qmc_dai_get_index(dai);
if (index > qmc_audio->num_dais)
return NULL;
return qmc_audio->dais + index;
}
/*
* The constraints for format/channel is to match with the number of 8bit
* time-slots available.
*/
static int qmc_dai_hw_rule_channels_by_format(struct qmc_dai *qmc_dai,
struct snd_pcm_hw_params *params,
unsigned int nb_ts)
{
struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
snd_pcm_format_t format = params_format(params);
struct snd_interval ch = {0};
switch (snd_pcm_format_physical_width(format)) {
case 8:
ch.max = nb_ts;
break;
case 16:
ch.max = nb_ts / 2;
break;
case 32:
ch.max = nb_ts / 4;
break;
case 64:
ch.max = nb_ts / 8;
break;
default:
dev_err(qmc_dai->dev, "format physical width %u not supported\n",
snd_pcm_format_physical_width(format));
return -EINVAL;
}
ch.min = ch.max ? 1 : 0;
return snd_interval_refine(c, &ch);
}
static int qmc_dai_hw_rule_playback_channels_by_format(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct qmc_dai *qmc_dai = rule->private;
return qmc_dai_hw_rule_channels_by_format(qmc_dai, params, qmc_dai->nb_tx_ts);
}
static int qmc_dai_hw_rule_capture_channels_by_format(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct qmc_dai *qmc_dai = rule->private;
return qmc_dai_hw_rule_channels_by_format(qmc_dai, params, qmc_dai->nb_rx_ts);
}
static int qmc_dai_hw_rule_format_by_channels(struct qmc_dai *qmc_dai,
struct snd_pcm_hw_params *params,
unsigned int nb_ts)
{
struct snd_mask *f_old = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
unsigned int channels = params_channels(params);
unsigned int slot_width;
snd_pcm_format_t format;
struct snd_mask f_new;
if (!channels || channels > nb_ts) {
dev_err(qmc_dai->dev, "channels %u not supported\n",
nb_ts);
return -EINVAL;
}
slot_width = (nb_ts / channels) * 8;
snd_mask_none(&f_new);
pcm_for_each_format(format) {
if (snd_mask_test_format(f_old, format)) {
if (snd_pcm_format_physical_width(format) <= slot_width)
snd_mask_set_format(&f_new, format);
}
}
return snd_mask_refine(f_old, &f_new);
}
static int qmc_dai_hw_rule_playback_format_by_channels(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct qmc_dai *qmc_dai = rule->private;
return qmc_dai_hw_rule_format_by_channels(qmc_dai, params, qmc_dai->nb_tx_ts);
}
static int qmc_dai_hw_rule_capture_format_by_channels(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct qmc_dai *qmc_dai = rule->private;
return qmc_dai_hw_rule_format_by_channels(qmc_dai, params, qmc_dai->nb_rx_ts);
}
static int qmc_dai_constraints_interleaved(struct snd_pcm_substream *substream,
struct qmc_dai *qmc_dai)
{
snd_pcm_hw_rule_func_t hw_rule_channels_by_format;
snd_pcm_hw_rule_func_t hw_rule_format_by_channels;
unsigned int frame_bits;
u64 access;
int ret;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
hw_rule_channels_by_format = qmc_dai_hw_rule_capture_channels_by_format;
hw_rule_format_by_channels = qmc_dai_hw_rule_capture_format_by_channels;
frame_bits = qmc_dai->nb_rx_ts * 8;
} else {
hw_rule_channels_by_format = qmc_dai_hw_rule_playback_channels_by_format;
hw_rule_format_by_channels = qmc_dai_hw_rule_playback_format_by_channels;
frame_bits = qmc_dai->nb_tx_ts * 8;
}
ret = snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
hw_rule_channels_by_format, qmc_dai,
SNDRV_PCM_HW_PARAM_FORMAT, -1);
if (ret) {
dev_err(qmc_dai->dev, "Failed to add channels rule (%d)\n", ret);
return ret;
}
ret = snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
hw_rule_format_by_channels, qmc_dai,
SNDRV_PCM_HW_PARAM_CHANNELS, -1);
if (ret) {
dev_err(qmc_dai->dev, "Failed to add format rule (%d)\n", ret);
return ret;
}
ret = snd_pcm_hw_constraint_single(substream->runtime,
SNDRV_PCM_HW_PARAM_FRAME_BITS,
frame_bits);
if (ret < 0) {
dev_err(qmc_dai->dev, "Failed to add frame_bits constraint (%d)\n", ret);
return ret;
}
access = 1ULL << (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED |
1ULL << (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED;
ret = snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_ACCESS,
access);
if (ret) {
dev_err(qmc_dai->dev, "Failed to add hw_param_access constraint (%d)\n", ret);
return ret;
}
return 0;
}
static int qmc_dai_constraints_noninterleaved(struct snd_pcm_substream *substream,
struct qmc_dai *qmc_dai)
{
unsigned int frame_bits;
u64 access;
int ret;
frame_bits = (substream->stream == SNDRV_PCM_STREAM_CAPTURE) ?
qmc_dai->nb_rx_ts * 8 : qmc_dai->nb_tx_ts * 8;
ret = snd_pcm_hw_constraint_single(substream->runtime,
SNDRV_PCM_HW_PARAM_FRAME_BITS,
frame_bits);
if (ret < 0) {
dev_err(qmc_dai->dev, "Failed to add frame_bits constraint (%d)\n", ret);
return ret;
}
access = 1ULL << (__force int)SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED |
1ULL << (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
ret = snd_pcm_hw_constraint_mask64(substream->runtime, SNDRV_PCM_HW_PARAM_ACCESS,
access);
if (ret) {
dev_err(qmc_dai->dev, "Failed to add hw_param_access constraint (%d)\n", ret);
return ret;
}
return 0;
}
static int qmc_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct qmc_dai_prtd *prtd = substream->runtime->private_data;
struct qmc_dai *qmc_dai;
qmc_dai = qmc_dai_get_data(dai);
if (!qmc_dai) {
dev_err(dai->dev, "Invalid dai\n");
return -EINVAL;
}
prtd->qmc_dai = qmc_dai;
return qmc_dai->nb_chans_avail > 1 ?
qmc_dai_constraints_noninterleaved(substream, qmc_dai) :
qmc_dai_constraints_interleaved(substream, qmc_dai);
}
static int qmc_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct qmc_chan_param chan_param = {0};
unsigned int nb_chans_used;
struct qmc_dai *qmc_dai;
unsigned int i;
int ret;
qmc_dai = qmc_dai_get_data(dai);
if (!qmc_dai) {
dev_err(dai->dev, "Invalid dai\n");
return -EINVAL;
}
/*
* In interleaved mode, the driver uses one QMC channel for all audio
* channels whereas in non-interleaved mode, it uses one QMC channel per
* audio channel.
*/
nb_chans_used = qmc_audio_access_is_interleaved(params_access(params)) ?
1 : params_channels(params);
if (nb_chans_used > qmc_dai->nb_chans_avail) {
dev_err(dai->dev, "Not enough qmc_chans. Need %u, avail %u\n",
nb_chans_used, qmc_dai->nb_chans_avail);
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
chan_param.mode = QMC_TRANSPARENT;
chan_param.transp.max_rx_buf_size = params_period_bytes(params) / nb_chans_used;
for (i = 0; i < nb_chans_used; i++) {
ret = qmc_chan_set_param(qmc_dai->chans[i].qmc_chan, &chan_param);
if (ret) {
dev_err(dai->dev, "chans[%u], set param failed %d\n",
i, ret);
return ret;
}
}
qmc_dai->nb_chans_used_rx = nb_chans_used;
} else {
qmc_dai->nb_chans_used_tx = nb_chans_used;
}
return 0;
}
static int qmc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
unsigned int nb_chans_used;
struct qmc_dai *qmc_dai;
unsigned int i;
int direction;
int ret = 0;
int ret_tmp;
qmc_dai = qmc_dai_get_data(dai);
if (!qmc_dai) {
dev_err(dai->dev, "Invalid dai\n");
return -EINVAL;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
direction = QMC_CHAN_WRITE;
nb_chans_used = qmc_dai->nb_chans_used_tx;
} else {
direction = QMC_CHAN_READ;
nb_chans_used = qmc_dai->nb_chans_used_rx;
}
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
for (i = 0; i < nb_chans_used; i++) {
ret = qmc_chan_start(qmc_dai->chans[i].qmc_chan, direction);
if (ret)
goto err_stop;
}
break;
case SNDRV_PCM_TRIGGER_STOP:
/* Stop and reset all QMC channels and return the first error encountered */
for (i = 0; i < nb_chans_used; i++) {
ret_tmp = qmc_chan_stop(qmc_dai->chans[i].qmc_chan, direction);
if (!ret)
ret = ret_tmp;
if (ret_tmp)
continue;
ret_tmp = qmc_chan_reset(qmc_dai->chans[i].qmc_chan, direction);
if (!ret)
ret = ret_tmp;
}
if (ret)
return ret;
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
/* Stop all QMC channels and return the first error encountered */
for (i = 0; i < nb_chans_used; i++) {
ret_tmp = qmc_chan_stop(qmc_dai->chans[i].qmc_chan, direction);
if (!ret)
ret = ret_tmp;
}
if (ret)
return ret;
break;
default:
return -EINVAL;
}
return 0;
err_stop:
while (i--) {
qmc_chan_stop(qmc_dai->chans[i].qmc_chan, direction);
qmc_chan_reset(qmc_dai->chans[i].qmc_chan, direction);
}
return ret;
}
static const struct snd_soc_dai_ops qmc_dai_ops = {
.startup = qmc_dai_startup,
.trigger = qmc_dai_trigger,
.hw_params = qmc_dai_hw_params,
};
static u64 qmc_audio_formats(u8 nb_ts, bool is_noninterleaved)
{
unsigned int format_width;
unsigned int chan_width;
snd_pcm_format_t format;
u64 formats_mask;
if (!nb_ts)
return 0;
formats_mask = 0;
chan_width = nb_ts * 8;
pcm_for_each_format(format) {
/*
* Support format other than little-endian (ie big-endian or
* without endianness such as 8bit formats)
*/
if (snd_pcm_format_little_endian(format) == 1)
continue;
/* Support physical width multiple of 8bit */
format_width = snd_pcm_format_physical_width(format);
if (format_width == 0 || format_width % 8)
continue;
/*
* And support physical width that can fit N times in the
* channel
*/
if (format_width > chan_width || chan_width % format_width)
continue;
/*
* In non interleaved mode, we can only support formats that
* can fit only 1 time in the channel
*/
if (is_noninterleaved && format_width != chan_width)
continue;
formats_mask |= pcm_format_to_bits(format);
}
return formats_mask;
}
static int qmc_audio_dai_parse(struct qmc_audio *qmc_audio, struct device_node *np,
struct qmc_dai *qmc_dai,
struct snd_soc_dai_driver *qmc_soc_dai_driver)
{
struct qmc_chan_info info;
unsigned long rx_fs_rate;
unsigned long tx_fs_rate;
unsigned int nb_tx_ts;
unsigned int nb_rx_ts;
unsigned int i;
int count;
u32 val;
int ret;
qmc_dai->dev = qmc_audio->dev;
ret = of_property_read_u32(np, "reg", &val);
if (ret) {
dev_err(qmc_audio->dev, "%pOF: failed to read reg\n", np);
return ret;
}
qmc_dai->id = val;
qmc_dai->name = devm_kasprintf(qmc_audio->dev, GFP_KERNEL, "%s.%d",
np->parent->name, qmc_dai->id);
if (!qmc_dai->name)
return -ENOMEM;
count = qmc_chan_count_phandles(np, "fsl,qmc-chan");
if (count < 0)
return dev_err_probe(qmc_audio->dev, count,
"dai %d get number of QMC channel failed\n", qmc_dai->id);
if (!count)
return dev_err_probe(qmc_audio->dev, -EINVAL,
"dai %d no QMC channel defined\n", qmc_dai->id);
qmc_dai->chans = devm_kcalloc(qmc_audio->dev, count, sizeof(*qmc_dai->chans), GFP_KERNEL);
if (!qmc_dai->chans)
return -ENOMEM;
for (i = 0; i < count; i++) {
qmc_dai->chans[i].qmc_chan = devm_qmc_chan_get_byphandles_index(qmc_audio->dev, np,
"fsl,qmc-chan", i);
if (IS_ERR(qmc_dai->chans[i].qmc_chan)) {
return dev_err_probe(qmc_audio->dev, PTR_ERR(qmc_dai->chans[i].qmc_chan),
"dai %d get QMC channel %d failed\n", qmc_dai->id, i);
}
ret = qmc_chan_get_info(qmc_dai->chans[i].qmc_chan, &info);
if (ret) {
dev_err(qmc_audio->dev, "dai %d get QMC %d channel info failed %d\n",
qmc_dai->id, i, ret);
return ret;
}
dev_info(qmc_audio->dev, "dai %d QMC channel %d mode %d, nb_tx_ts %u, nb_rx_ts %u\n",
qmc_dai->id, i, info.mode, info.nb_tx_ts, info.nb_rx_ts);
if (info.mode != QMC_TRANSPARENT) {
dev_err(qmc_audio->dev, "dai %d QMC chan %d mode %d is not QMC_TRANSPARENT\n",
qmc_dai->id, i, info.mode);
return -EINVAL;
}
/*
* All channels must have the same number of Tx slots and the
* same numbers of Rx slots.
*/
if (i == 0) {
nb_tx_ts = info.nb_tx_ts;
nb_rx_ts = info.nb_rx_ts;
tx_fs_rate = info.tx_fs_rate;
rx_fs_rate = info.rx_fs_rate;
} else {
if (nb_tx_ts != info.nb_tx_ts) {
dev_err(qmc_audio->dev, "dai %d QMC chan %d inconsistent number of Tx timeslots (%u instead of %u)\n",
qmc_dai->id, i, info.nb_tx_ts, nb_tx_ts);
return -EINVAL;
}
if (nb_rx_ts != info.nb_rx_ts) {
dev_err(qmc_audio->dev, "dai %d QMC chan %d inconsistent number of Rx timeslots (%u instead of %u)\n",
qmc_dai->id, i, info.nb_rx_ts, nb_rx_ts);
return -EINVAL;
}
if (tx_fs_rate != info.tx_fs_rate) {
dev_err(qmc_audio->dev, "dai %d QMC chan %d inconsistent Tx frame sample rate (%lu instead of %lu)\n",
qmc_dai->id, i, info.tx_fs_rate, tx_fs_rate);
return -EINVAL;
}
if (rx_fs_rate != info.rx_fs_rate) {
dev_err(qmc_audio->dev, "dai %d QMC chan %d inconsistent Rx frame sample rate (%lu instead of %lu)\n",
qmc_dai->id, i, info.rx_fs_rate, rx_fs_rate);
return -EINVAL;
}
}
}
qmc_dai->nb_chans_avail = count;
qmc_dai->nb_tx_ts = nb_tx_ts * count;
qmc_dai->nb_rx_ts = nb_rx_ts * count;
qmc_soc_dai_driver->id = qmc_dai->id;
qmc_soc_dai_driver->name = qmc_dai->name;
qmc_soc_dai_driver->playback.channels_min = 0;
qmc_soc_dai_driver->playback.channels_max = 0;
if (nb_tx_ts) {
qmc_soc_dai_driver->playback.channels_min = 1;
qmc_soc_dai_driver->playback.channels_max = count > 1 ? count : nb_tx_ts;
}
qmc_soc_dai_driver->playback.formats = qmc_audio_formats(nb_tx_ts,
count > 1 ? true : false);
qmc_soc_dai_driver->capture.channels_min = 0;
qmc_soc_dai_driver->capture.channels_max = 0;
if (nb_rx_ts) {
qmc_soc_dai_driver->capture.channels_min = 1;
qmc_soc_dai_driver->capture.channels_max = count > 1 ? count : nb_rx_ts;
}
qmc_soc_dai_driver->capture.formats = qmc_audio_formats(nb_rx_ts,
count > 1 ? true : false);
qmc_soc_dai_driver->playback.rates = snd_pcm_rate_to_rate_bit(tx_fs_rate);
qmc_soc_dai_driver->playback.rate_min = tx_fs_rate;
qmc_soc_dai_driver->playback.rate_max = tx_fs_rate;
qmc_soc_dai_driver->capture.rates = snd_pcm_rate_to_rate_bit(rx_fs_rate);
qmc_soc_dai_driver->capture.rate_min = rx_fs_rate;
qmc_soc_dai_driver->capture.rate_max = rx_fs_rate;
qmc_soc_dai_driver->ops = &qmc_dai_ops;
return 0;
}
static int qmc_audio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct qmc_audio *qmc_audio;
struct device_node *child;
unsigned int i;
int ret;
qmc_audio = devm_kzalloc(&pdev->dev, sizeof(*qmc_audio), GFP_KERNEL);
if (!qmc_audio)
return -ENOMEM;
qmc_audio->dev = &pdev->dev;
qmc_audio->num_dais = of_get_available_child_count(np);
if (qmc_audio->num_dais) {
qmc_audio->dais = devm_kcalloc(&pdev->dev, qmc_audio->num_dais,
sizeof(*qmc_audio->dais),
GFP_KERNEL);
if (!qmc_audio->dais)
return -ENOMEM;
qmc_audio->dai_drivers = devm_kcalloc(&pdev->dev, qmc_audio->num_dais,
sizeof(*qmc_audio->dai_drivers),
GFP_KERNEL);
if (!qmc_audio->dai_drivers)
return -ENOMEM;
}
i = 0;
for_each_available_child_of_node(np, child) {
ret = qmc_audio_dai_parse(qmc_audio, child,
qmc_audio->dais + i,
qmc_audio->dai_drivers + i);
if (ret) {
of_node_put(child);
return ret;
}
i++;
}
platform_set_drvdata(pdev, qmc_audio);
ret = devm_snd_soc_register_component(qmc_audio->dev,
&qmc_audio_soc_platform,
qmc_audio->dai_drivers,
qmc_audio->num_dais);
if (ret)
return ret;
return 0;
}
static const struct of_device_id qmc_audio_id_table[] = {
{ .compatible = "fsl,qmc-audio" },
{} /* sentinel */
};
MODULE_DEVICE_TABLE(of, qmc_audio_id_table);
static struct platform_driver qmc_audio_driver = {
.driver = {
.name = "fsl-qmc-audio",
.of_match_table = of_match_ptr(qmc_audio_id_table),
},
.probe = qmc_audio_probe,
};
module_platform_driver(qmc_audio_driver);
MODULE_AUTHOR("Herve Codina <[email protected]>");
MODULE_DESCRIPTION("CPM/QE QMC audio driver");
MODULE_LICENSE("GPL");
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