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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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37e59f876b
There are several left overs with my old email address. Remove their occurrences and add myself at CREDITS, to allow people to be able to reach me on my new addresses. Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
530 lines
12 KiB
C
530 lines
12 KiB
C
/*
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*
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* Support for audio capture for tm5600/6000/6010
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* (c) 2007-2008 Mauro Carvalho Chehab
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*
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* Based on cx88-alsa.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/usb.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/control.h>
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#include <sound/initval.h>
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#include "tm6000.h"
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#include "tm6000-regs.h"
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#undef dprintk
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#define dprintk(level, fmt, arg...) do { \
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if (debug >= level) \
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printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg); \
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} while (0)
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/****************************************************************************
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Module global static vars
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****************************************************************************/
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
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static bool enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(enable, "Enable tm6000x soundcard. default enabled.");
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for tm6000x capture interface(s).");
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/****************************************************************************
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Module macros
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****************************************************************************/
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MODULE_DESCRIPTION("ALSA driver module for tm5600/tm6000/tm6010 based TV cards");
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MODULE_AUTHOR("Mauro Carvalho Chehab");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("{{Trident,tm5600},"
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"{{Trident,tm6000},"
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"{{Trident,tm6010}");
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static unsigned int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "enable debug messages");
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/****************************************************************************
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Module specific funtions
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****************************************************************************/
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/*
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* BOARD Specific: Sets audio DMA
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*/
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static int _tm6000_start_audio_dma(struct snd_tm6000_card *chip)
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{
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struct tm6000_core *core = chip->core;
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dprintk(1, "Starting audio DMA\n");
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/* Enables audio */
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tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x40, 0x40);
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tm6000_set_audio_bitrate(core, 48000);
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return 0;
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}
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/*
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* BOARD Specific: Resets audio DMA
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*/
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static int _tm6000_stop_audio_dma(struct snd_tm6000_card *chip)
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{
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struct tm6000_core *core = chip->core;
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dprintk(1, "Stopping audio DMA\n");
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/* Disables audio */
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tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x00, 0x40);
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return 0;
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}
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static void dsp_buffer_free(struct snd_pcm_substream *substream)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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dprintk(2, "Freeing buffer\n");
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vfree(substream->runtime->dma_area);
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substream->runtime->dma_area = NULL;
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substream->runtime->dma_bytes = 0;
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}
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static int dsp_buffer_alloc(struct snd_pcm_substream *substream, int size)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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dprintk(2, "Allocating buffer\n");
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if (substream->runtime->dma_area) {
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if (substream->runtime->dma_bytes > size)
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return 0;
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dsp_buffer_free(substream);
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}
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substream->runtime->dma_area = vmalloc(size);
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if (!substream->runtime->dma_area)
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return -ENOMEM;
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substream->runtime->dma_bytes = size;
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return 0;
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}
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/****************************************************************************
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ALSA PCM Interface
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****************************************************************************/
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/*
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* Digital hardware definition
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*/
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#define DEFAULT_FIFO_SIZE 4096
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static struct snd_pcm_hardware snd_tm6000_digital_hw = {
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.info = SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP_VALID,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
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.rate_min = 48000,
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.rate_max = 48000,
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.channels_min = 2,
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.channels_max = 2,
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.period_bytes_min = 64,
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.period_bytes_max = 12544,
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.periods_min = 2,
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.periods_max = 98,
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.buffer_bytes_max = 62720 * 8,
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};
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/*
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* audio pcm capture open callback
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*/
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static int snd_tm6000_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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err = snd_pcm_hw_constraint_pow2(runtime, 0,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (err < 0)
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goto _error;
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chip->substream = substream;
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runtime->hw = snd_tm6000_digital_hw;
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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return 0;
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_error:
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dprintk(1, "Error opening PCM!\n");
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return err;
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}
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/*
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* audio close callback
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*/
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static int snd_tm6000_close(struct snd_pcm_substream *substream)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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struct tm6000_core *core = chip->core;
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if (atomic_read(&core->stream_started) > 0) {
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atomic_set(&core->stream_started, 0);
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schedule_work(&core->wq_trigger);
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}
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return 0;
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}
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static int tm6000_fillbuf(struct tm6000_core *core, char *buf, int size)
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{
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struct snd_tm6000_card *chip = core->adev;
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struct snd_pcm_substream *substream = chip->substream;
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struct snd_pcm_runtime *runtime;
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int period_elapsed = 0;
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unsigned int stride, buf_pos;
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int length;
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if (atomic_read(&core->stream_started) == 0)
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return 0;
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if (!size || !substream) {
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dprintk(1, "substream was NULL\n");
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return -EINVAL;
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}
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runtime = substream->runtime;
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if (!runtime || !runtime->dma_area) {
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dprintk(1, "runtime was NULL\n");
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return -EINVAL;
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}
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buf_pos = chip->buf_pos;
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stride = runtime->frame_bits >> 3;
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if (stride == 0) {
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dprintk(1, "stride is zero\n");
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return -EINVAL;
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}
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length = size / stride;
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if (length == 0) {
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dprintk(1, "%s: length was zero\n", __func__);
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return -EINVAL;
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}
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dprintk(1, "Copying %d bytes at %p[%d] - buf size=%d x %d\n", size,
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runtime->dma_area, buf_pos,
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(unsigned int)runtime->buffer_size, stride);
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if (buf_pos + length >= runtime->buffer_size) {
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unsigned int cnt = runtime->buffer_size - buf_pos;
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memcpy(runtime->dma_area + buf_pos * stride, buf, cnt * stride);
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memcpy(runtime->dma_area, buf + cnt * stride,
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length * stride - cnt * stride);
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} else
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memcpy(runtime->dma_area + buf_pos * stride, buf,
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length * stride);
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snd_pcm_stream_lock(substream);
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chip->buf_pos += length;
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if (chip->buf_pos >= runtime->buffer_size)
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chip->buf_pos -= runtime->buffer_size;
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chip->period_pos += length;
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if (chip->period_pos >= runtime->period_size) {
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chip->period_pos -= runtime->period_size;
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period_elapsed = 1;
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}
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snd_pcm_stream_unlock(substream);
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if (period_elapsed)
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snd_pcm_period_elapsed(substream);
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return 0;
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}
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/*
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* hw_params callback
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*/
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static int snd_tm6000_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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int size, rc;
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size = params_period_bytes(hw_params) * params_periods(hw_params);
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rc = dsp_buffer_alloc(substream, size);
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if (rc < 0)
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return rc;
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return 0;
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}
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/*
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* hw free callback
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*/
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static int snd_tm6000_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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struct tm6000_core *core = chip->core;
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if (atomic_read(&core->stream_started) > 0) {
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atomic_set(&core->stream_started, 0);
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schedule_work(&core->wq_trigger);
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}
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dsp_buffer_free(substream);
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return 0;
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}
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/*
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* prepare callback
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*/
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static int snd_tm6000_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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chip->buf_pos = 0;
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chip->period_pos = 0;
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return 0;
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}
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/*
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* trigger callback
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*/
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static void audio_trigger(struct work_struct *work)
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{
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struct tm6000_core *core = container_of(work, struct tm6000_core,
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wq_trigger);
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struct snd_tm6000_card *chip = core->adev;
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if (atomic_read(&core->stream_started)) {
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dprintk(1, "starting capture");
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_tm6000_start_audio_dma(chip);
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} else {
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dprintk(1, "stopping capture");
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_tm6000_stop_audio_dma(chip);
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}
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}
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static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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struct tm6000_core *core = chip->core;
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int err = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
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case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
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case SNDRV_PCM_TRIGGER_START:
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atomic_set(&core->stream_started, 1);
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break;
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
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case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
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case SNDRV_PCM_TRIGGER_STOP:
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atomic_set(&core->stream_started, 0);
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break;
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default:
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err = -EINVAL;
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break;
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}
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schedule_work(&core->wq_trigger);
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return err;
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}
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/*
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* pointer callback
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*/
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static snd_pcm_uframes_t snd_tm6000_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
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return chip->buf_pos;
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}
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static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
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unsigned long offset)
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{
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void *pageptr = subs->runtime->dma_area + offset;
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return vmalloc_to_page(pageptr);
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}
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/*
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* operators
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*/
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static struct snd_pcm_ops snd_tm6000_pcm_ops = {
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.open = snd_tm6000_pcm_open,
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.close = snd_tm6000_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_tm6000_hw_params,
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.hw_free = snd_tm6000_hw_free,
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.prepare = snd_tm6000_prepare,
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.trigger = snd_tm6000_card_trigger,
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.pointer = snd_tm6000_pointer,
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.page = snd_pcm_get_vmalloc_page,
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};
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/*
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* create a PCM device
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*/
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/* FIXME: Control interface - How to control volume/mute? */
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/****************************************************************************
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Basic Flow for Sound Devices
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****************************************************************************/
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/*
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* Alsa Constructor - Component probe
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*/
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static int tm6000_audio_init(struct tm6000_core *dev)
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{
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struct snd_card *card;
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struct snd_tm6000_card *chip;
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int rc;
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static int devnr;
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char component[14];
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struct snd_pcm *pcm;
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if (!dev)
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return 0;
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if (devnr >= SNDRV_CARDS)
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return -ENODEV;
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if (!enable[devnr])
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return -ENOENT;
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rc = snd_card_create(index[devnr], "tm6000", THIS_MODULE, 0, &card);
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if (rc < 0) {
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snd_printk(KERN_ERR "cannot create card instance %d\n", devnr);
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return rc;
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}
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strcpy(card->driver, "tm6000-alsa");
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strcpy(card->shortname, "TM5600/60x0");
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sprintf(card->longname, "TM5600/60x0 Audio at bus %d device %d",
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dev->udev->bus->busnum, dev->udev->devnum);
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sprintf(component, "USB%04x:%04x",
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le16_to_cpu(dev->udev->descriptor.idVendor),
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le16_to_cpu(dev->udev->descriptor.idProduct));
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snd_component_add(card, component);
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snd_card_set_dev(card, &dev->udev->dev);
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chip = kzalloc(sizeof(struct snd_tm6000_card), GFP_KERNEL);
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if (!chip) {
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rc = -ENOMEM;
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goto error;
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}
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chip->core = dev;
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chip->card = card;
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dev->adev = chip;
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spin_lock_init(&chip->reg_lock);
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rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm);
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if (rc < 0)
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goto error_chip;
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pcm->info_flags = 0;
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pcm->private_data = chip;
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strcpy(pcm->name, "Trident TM5600/60x0");
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops);
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INIT_WORK(&dev->wq_trigger, audio_trigger);
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rc = snd_card_register(card);
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if (rc < 0)
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goto error_chip;
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dprintk(1, "Registered audio driver for %s\n", card->longname);
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return 0;
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error_chip:
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kfree(chip);
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dev->adev = NULL;
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error:
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snd_card_free(card);
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return rc;
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}
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static int tm6000_audio_fini(struct tm6000_core *dev)
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{
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struct snd_tm6000_card *chip;
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if (!dev)
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return 0;
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chip = dev->adev;
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if (!chip)
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return 0;
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if (!chip->card)
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return 0;
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snd_card_free(chip->card);
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chip->card = NULL;
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kfree(chip);
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dev->adev = NULL;
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return 0;
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}
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static struct tm6000_ops audio_ops = {
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.type = TM6000_AUDIO,
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.name = "TM6000 Audio Extension",
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.init = tm6000_audio_init,
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.fini = tm6000_audio_fini,
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.fillbuf = tm6000_fillbuf,
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};
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static int __init tm6000_alsa_register(void)
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{
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return tm6000_register_extension(&audio_ops);
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}
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static void __exit tm6000_alsa_unregister(void)
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{
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tm6000_unregister_extension(&audio_ops);
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}
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module_init(tm6000_alsa_register);
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module_exit(tm6000_alsa_unregister);
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