linux_dsm_epyc7002/sound/firewire/fireface/amdtp-ff.c
Thomas Gleixner da607e1969 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 345
Based on 1 normalized pattern(s):

  licensed under the terms of the gnu general public license version 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 88 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000437.521539229@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:08 +02:00

155 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* amdtp-ff.c - a part of driver for RME Fireface series
*
* Copyright (c) 2015-2017 Takashi Sakamoto
*/
#include <sound/pcm.h>
#include "ff.h"
struct amdtp_ff {
unsigned int pcm_channels;
};
int amdtp_ff_set_parameters(struct amdtp_stream *s, unsigned int rate,
unsigned int pcm_channels)
{
struct amdtp_ff *p = s->protocol;
unsigned int data_channels;
if (amdtp_stream_running(s))
return -EBUSY;
p->pcm_channels = pcm_channels;
data_channels = pcm_channels;
return amdtp_stream_set_parameters(s, rate, data_channels);
}
static void write_pcm_s32(struct amdtp_stream *s,
struct snd_pcm_substream *pcm,
__le32 *buffer, unsigned int frames)
{
struct amdtp_ff *p = s->protocol;
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int channels, remaining_frames, i, c;
const u32 *src;
channels = p->pcm_channels;
src = (void *)runtime->dma_area +
frames_to_bytes(runtime, s->pcm_buffer_pointer);
remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
for (i = 0; i < frames; ++i) {
for (c = 0; c < channels; ++c) {
buffer[c] = cpu_to_le32(*src);
src++;
}
buffer += s->data_block_quadlets;
if (--remaining_frames == 0)
src = (void *)runtime->dma_area;
}
}
static void read_pcm_s32(struct amdtp_stream *s,
struct snd_pcm_substream *pcm,
__le32 *buffer, unsigned int frames)
{
struct amdtp_ff *p = s->protocol;
struct snd_pcm_runtime *runtime = pcm->runtime;
unsigned int channels, remaining_frames, i, c;
u32 *dst;
channels = p->pcm_channels;
dst = (void *)runtime->dma_area +
frames_to_bytes(runtime, s->pcm_buffer_pointer);
remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
for (i = 0; i < frames; ++i) {
for (c = 0; c < channels; ++c) {
*dst = le32_to_cpu(buffer[c]) & 0xffffff00;
dst++;
}
buffer += s->data_block_quadlets;
if (--remaining_frames == 0)
dst = (void *)runtime->dma_area;
}
}
static void write_pcm_silence(struct amdtp_stream *s,
__le32 *buffer, unsigned int frames)
{
struct amdtp_ff *p = s->protocol;
unsigned int i, c, channels = p->pcm_channels;
for (i = 0; i < frames; ++i) {
for (c = 0; c < channels; ++c)
buffer[c] = cpu_to_le32(0x00000000);
buffer += s->data_block_quadlets;
}
}
int amdtp_ff_add_pcm_hw_constraints(struct amdtp_stream *s,
struct snd_pcm_runtime *runtime)
{
int err;
err = snd_pcm_hw_constraint_msbits(runtime, 0, 32, 24);
if (err < 0)
return err;
return amdtp_stream_add_pcm_hw_constraints(s, runtime);
}
static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
__be32 *buffer,
unsigned int data_blocks,
unsigned int *syt)
{
struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
unsigned int pcm_frames;
if (pcm) {
write_pcm_s32(s, pcm, (__le32 *)buffer, data_blocks);
pcm_frames = data_blocks;
} else {
write_pcm_silence(s, (__le32 *)buffer, data_blocks);
pcm_frames = 0;
}
return pcm_frames;
}
static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
__be32 *buffer,
unsigned int data_blocks,
unsigned int *syt)
{
struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
unsigned int pcm_frames;
if (pcm) {
read_pcm_s32(s, pcm, (__le32 *)buffer, data_blocks);
pcm_frames = data_blocks;
} else {
pcm_frames = 0;
}
return pcm_frames;
}
int amdtp_ff_init(struct amdtp_stream *s, struct fw_unit *unit,
enum amdtp_stream_direction dir)
{
amdtp_stream_process_data_blocks_t process_data_blocks;
if (dir == AMDTP_IN_STREAM)
process_data_blocks = process_tx_data_blocks;
else
process_data_blocks = process_rx_data_blocks;
return amdtp_stream_init(s, unit, dir, CIP_NO_HEADER, 0,
process_data_blocks, sizeof(struct amdtp_ff));
}