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CoolPi-Armbian-Rockchip-RK3.../drivers/media/pci/cobalt/cobalt-alsa-pcm.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* ALSA PCM device for the
* ALSA interface to cobalt PCM capture streams
*
* Copyright 2014-2015 Cisco Systems, Inc. and/or its affiliates.
* All rights reserved.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <media/v4l2-device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include "cobalt-driver.h"
#include "cobalt-alsa.h"
#include "cobalt-alsa-pcm.h"
static unsigned int pcm_debug;
module_param(pcm_debug, int, 0644);
MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm");
#define dprintk(fmt, arg...) \
do { \
if (pcm_debug) \
pr_info("cobalt-alsa-pcm %s: " fmt, __func__, ##arg); \
} while (0)
static const struct snd_pcm_hardware snd_cobalt_hdmi_capture = {
.info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 8,
.buffer_bytes_max = 4 * 240 * 8 * 4, /* 5 ms of data */
.period_bytes_min = 1920, /* 1 sample = 8 * 4 bytes */
.period_bytes_max = 240 * 8 * 4, /* 5 ms of 8 channel data */
.periods_min = 1,
.periods_max = 4,
};
static const struct snd_pcm_hardware snd_cobalt_playback = {
.info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 8,
.buffer_bytes_max = 4 * 240 * 8 * 4, /* 5 ms of data */
.period_bytes_min = 1920, /* 1 sample = 8 * 4 bytes */
.period_bytes_max = 240 * 8 * 4, /* 5 ms of 8 channel data */
.periods_min = 1,
.periods_max = 4,
};
static void sample_cpy(u8 *dst, const u8 *src, u32 len, bool is_s32)
{
static const unsigned map[8] = { 0, 1, 5, 4, 2, 3, 6, 7 };
unsigned idx = 0;
while (len >= (is_s32 ? 4 : 2)) {
unsigned offset = map[idx] * 4;
u32 val = src[offset + 1] + (src[offset + 2] << 8) +
(src[offset + 3] << 16);
if (is_s32) {
*dst++ = 0;
*dst++ = val & 0xff;
}
*dst++ = (val >> 8) & 0xff;
*dst++ = (val >> 16) & 0xff;
len -= is_s32 ? 4 : 2;
idx++;
}
}
static void cobalt_alsa_announce_pcm_data(struct snd_cobalt_card *cobsc,
u8 *pcm_data,
size_t skip,
size_t samples)
{
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
unsigned long flags;
unsigned int oldptr;
unsigned int stride;
int length = samples;
int period_elapsed = 0;
bool is_s32;
dprintk("cobalt alsa announce ptr=%p data=%p num_bytes=%zd\n", cobsc,
pcm_data, samples);
substream = cobsc->capture_pcm_substream;
if (substream == NULL) {
dprintk("substream was NULL\n");
return;
}
runtime = substream->runtime;
if (runtime == NULL) {
dprintk("runtime was NULL\n");
return;
}
is_s32 = runtime->format == SNDRV_PCM_FORMAT_S32_LE;
stride = runtime->frame_bits >> 3;
if (stride == 0) {
dprintk("stride is zero\n");
return;
}
if (length == 0) {
dprintk("%s: length was zero\n", __func__);
return;
}
if (runtime->dma_area == NULL) {
dprintk("dma area was NULL - ignoring\n");
return;
}
oldptr = cobsc->hwptr_done_capture;
if (oldptr + length >= runtime->buffer_size) {
unsigned int cnt = runtime->buffer_size - oldptr;
unsigned i;
for (i = 0; i < cnt; i++)
sample_cpy(runtime->dma_area + (oldptr + i) * stride,
pcm_data + i * skip,
stride, is_s32);
for (i = cnt; i < length; i++)
sample_cpy(runtime->dma_area + (i - cnt) * stride,
pcm_data + i * skip, stride, is_s32);
} else {
unsigned i;
for (i = 0; i < length; i++)
sample_cpy(runtime->dma_area + (oldptr + i) * stride,
pcm_data + i * skip,
stride, is_s32);
}
snd_pcm_stream_lock_irqsave(substream, flags);
cobsc->hwptr_done_capture += length;
if (cobsc->hwptr_done_capture >=
runtime->buffer_size)
cobsc->hwptr_done_capture -=
runtime->buffer_size;
cobsc->capture_transfer_done += length;
if (cobsc->capture_transfer_done >=
runtime->period_size) {
cobsc->capture_transfer_done -=
runtime->period_size;
period_elapsed = 1;
}
snd_pcm_stream_unlock_irqrestore(substream, flags);
if (period_elapsed)
snd_pcm_period_elapsed(substream);
}
static int alsa_fnc(struct vb2_buffer *vb, void *priv)
{
struct cobalt_stream *s = priv;
unsigned char *p = vb2_plane_vaddr(vb, 0);
int i;
if (pcm_debug) {
pr_info("alsa: ");
for (i = 0; i < 8 * 4; i++) {
if (!(i & 3))
pr_cont(" ");
pr_cont("%02x", p[i]);
}
pr_cont("\n");
}
cobalt_alsa_announce_pcm_data(s->alsa,
vb2_plane_vaddr(vb, 0),
8 * 4,
vb2_get_plane_payload(vb, 0) / (8 * 4));
return 0;
}
static int snd_cobalt_pcm_capture_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
struct cobalt_stream *s = cobsc->s;
runtime->hw = snd_cobalt_hdmi_capture;
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
cobsc->capture_pcm_substream = substream;
runtime->private_data = s;
cobsc->alsa_record_cnt++;
if (cobsc->alsa_record_cnt == 1) {
int rc;
rc = vb2_thread_start(&s->q, alsa_fnc, s, s->vdev.name);
if (rc) {
cobsc->alsa_record_cnt--;
return rc;
}
}
return 0;
}
static int snd_cobalt_pcm_capture_close(struct snd_pcm_substream *substream)
{
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
struct cobalt_stream *s = cobsc->s;
cobsc->alsa_record_cnt--;
if (cobsc->alsa_record_cnt == 0)
vb2_thread_stop(&s->q);
return 0;
}
static int snd_cobalt_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
cobsc->hwptr_done_capture = 0;
cobsc->capture_transfer_done = 0;
return 0;
}
static int snd_cobalt_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_STOP:
return 0;
default:
return -EINVAL;
}
return 0;
}
static
snd_pcm_uframes_t snd_cobalt_pcm_pointer(struct snd_pcm_substream *substream)
{
snd_pcm_uframes_t hwptr_done;
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
hwptr_done = cobsc->hwptr_done_capture;
return hwptr_done;
}
static void pb_sample_cpy(u8 *dst, const u8 *src, u32 len, bool is_s32)
{
static const unsigned map[8] = { 0, 1, 5, 4, 2, 3, 6, 7 };
unsigned idx = 0;
while (len >= (is_s32 ? 4 : 2)) {
unsigned offset = map[idx] * 4;
u8 *out = dst + offset;
*out++ = 0;
if (is_s32) {
src++;
*out++ = *src++;
} else {
*out++ = 0;
}
*out++ = *src++;
*out = *src++;
len -= is_s32 ? 4 : 2;
idx++;
}
}
static void cobalt_alsa_pb_pcm_data(struct snd_cobalt_card *cobsc,
u8 *pcm_data,
size_t skip,
size_t samples)
{
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
unsigned long flags;
unsigned int pos;
unsigned int stride;
bool is_s32;
unsigned i;
dprintk("cobalt alsa pb ptr=%p data=%p samples=%zd\n", cobsc,
pcm_data, samples);
substream = cobsc->playback_pcm_substream;
if (substream == NULL) {
dprintk("substream was NULL\n");
return;
}
runtime = substream->runtime;
if (runtime == NULL) {
dprintk("runtime was NULL\n");
return;
}
is_s32 = runtime->format == SNDRV_PCM_FORMAT_S32_LE;
stride = runtime->frame_bits >> 3;
if (stride == 0) {
dprintk("stride is zero\n");
return;
}
if (samples == 0) {
dprintk("%s: samples was zero\n", __func__);
return;
}
if (runtime->dma_area == NULL) {
dprintk("dma area was NULL - ignoring\n");
return;
}
pos = cobsc->pb_pos % cobsc->pb_size;
for (i = 0; i < cobsc->pb_count / (8 * 4); i++)
pb_sample_cpy(pcm_data + i * skip,
runtime->dma_area + pos + i * stride,
stride, is_s32);
snd_pcm_stream_lock_irqsave(substream, flags);
cobsc->pb_pos += i * stride;
snd_pcm_stream_unlock_irqrestore(substream, flags);
if (cobsc->pb_pos % cobsc->pb_count == 0)
snd_pcm_period_elapsed(substream);
}
static int alsa_pb_fnc(struct vb2_buffer *vb, void *priv)
{
struct cobalt_stream *s = priv;
if (s->alsa->alsa_pb_channel)
cobalt_alsa_pb_pcm_data(s->alsa,
vb2_plane_vaddr(vb, 0),
8 * 4,
vb2_get_plane_payload(vb, 0) / (8 * 4));
return 0;
}
static int snd_cobalt_pcm_playback_open(struct snd_pcm_substream *substream)
{
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct cobalt_stream *s = cobsc->s;
runtime->hw = snd_cobalt_playback;
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
cobsc->playback_pcm_substream = substream;
runtime->private_data = s;
cobsc->alsa_playback_cnt++;
if (cobsc->alsa_playback_cnt == 1) {
int rc;
rc = vb2_thread_start(&s->q, alsa_pb_fnc, s, s->vdev.name);
if (rc) {
cobsc->alsa_playback_cnt--;
return rc;
}
}
return 0;
}
static int snd_cobalt_pcm_playback_close(struct snd_pcm_substream *substream)
{
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
struct cobalt_stream *s = cobsc->s;
cobsc->alsa_playback_cnt--;
if (cobsc->alsa_playback_cnt == 0)
vb2_thread_stop(&s->q);
return 0;
}
static int snd_cobalt_pcm_pb_prepare(struct snd_pcm_substream *substream)
{
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
cobsc->pb_size = snd_pcm_lib_buffer_bytes(substream);
cobsc->pb_count = snd_pcm_lib_period_bytes(substream);
cobsc->pb_pos = 0;
return 0;
}
static int snd_cobalt_pcm_pb_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
if (cobsc->alsa_pb_channel)
return -EBUSY;
cobsc->alsa_pb_channel = true;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
cobsc->alsa_pb_channel = false;
return 0;
default:
return -EINVAL;
}
}
static
snd_pcm_uframes_t snd_cobalt_pcm_pb_pointer(struct snd_pcm_substream *substream)
{
struct snd_cobalt_card *cobsc = snd_pcm_substream_chip(substream);
size_t ptr;
ptr = cobsc->pb_pos;
return bytes_to_frames(substream->runtime, ptr) %
substream->runtime->buffer_size;
}
static const struct snd_pcm_ops snd_cobalt_pcm_capture_ops = {
.open = snd_cobalt_pcm_capture_open,
.close = snd_cobalt_pcm_capture_close,
.prepare = snd_cobalt_pcm_prepare,
.trigger = snd_cobalt_pcm_trigger,
.pointer = snd_cobalt_pcm_pointer,
};
static const struct snd_pcm_ops snd_cobalt_pcm_playback_ops = {
.open = snd_cobalt_pcm_playback_open,
.close = snd_cobalt_pcm_playback_close,
.prepare = snd_cobalt_pcm_pb_prepare,
.trigger = snd_cobalt_pcm_pb_trigger,
.pointer = snd_cobalt_pcm_pb_pointer,
};
int snd_cobalt_pcm_create(struct snd_cobalt_card *cobsc)
{
struct snd_pcm *sp;
struct snd_card *sc = cobsc->sc;
struct cobalt_stream *s = cobsc->s;
struct cobalt *cobalt = s->cobalt;
int ret;
s->q.gfp_flags |= __GFP_ZERO;
if (!s->is_output) {
cobalt_s_bit_sysctrl(cobalt,
COBALT_SYS_CTRL_AUDIO_IPP_RESETN_BIT(s->video_channel),
0);
mdelay(2);
cobalt_s_bit_sysctrl(cobalt,
COBALT_SYS_CTRL_AUDIO_IPP_RESETN_BIT(s->video_channel),
1);
mdelay(1);
ret = snd_pcm_new(sc, "Cobalt PCM-In HDMI",
0, /* PCM device 0, the only one for this card */
0, /* 0 playback substreams */
1, /* 1 capture substream */
&sp);
if (ret) {
cobalt_err("snd_cobalt_pcm_create() failed for input with err %d\n",
ret);
goto err_exit;
}
snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE,
&snd_cobalt_pcm_capture_ops);
snd_pcm_set_managed_buffer_all(sp, SNDRV_DMA_TYPE_VMALLOC,
NULL, 0, 0);
sp->info_flags = 0;
sp->private_data = cobsc;
strscpy(sp->name, "cobalt", sizeof(sp->name));
} else {
cobalt_s_bit_sysctrl(cobalt,
COBALT_SYS_CTRL_AUDIO_OPP_RESETN_BIT, 0);
mdelay(2);
cobalt_s_bit_sysctrl(cobalt,
COBALT_SYS_CTRL_AUDIO_OPP_RESETN_BIT, 1);
mdelay(1);
ret = snd_pcm_new(sc, "Cobalt PCM-Out HDMI",
0, /* PCM device 0, the only one for this card */
1, /* 0 playback substreams */
0, /* 1 capture substream */
&sp);
if (ret) {
cobalt_err("snd_cobalt_pcm_create() failed for output with err %d\n",
ret);
goto err_exit;
}
snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_PLAYBACK,
&snd_cobalt_pcm_playback_ops);
snd_pcm_set_managed_buffer_all(sp, SNDRV_DMA_TYPE_VMALLOC,
NULL, 0, 0);
sp->info_flags = 0;
sp->private_data = cobsc;
strscpy(sp->name, "cobalt", sizeof(sp->name));
}
return 0;
err_exit:
return ret;
}
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