522 lines
12 KiB
C
522 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Support for audio capture for tm5600/6000/6010
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// Copyright (c) 2007-2008 Mauro Carvalho Chehab <mchehab@kernel.org>
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//
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// Based on cx88-alsa.c
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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] = SNDRV_DEFAULT_ENABLE_PNP;
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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 v2");
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MODULE_SUPPORTED_DEVICE("{{Trident,tm5600},{{Trident,tm6000},{{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 functions
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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 const 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 const 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_new(&dev->udev->dev, index[devnr], "tm6000",
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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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strscpy(card->driver, "tm6000-alsa", sizeof(card->driver));
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strscpy(card->shortname, "TM5600/60x0", sizeof(card->shortname));
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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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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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strscpy(pcm->name, "Trident TM5600/60x0", sizeof(pcm->name));
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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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