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*
* Support for audio capture for tm5600/6000/6010
* (c) 2007-2008 Mauro Carvalho Chehab <mchehab@redhat.com>
*
* Based on cx88-alsa.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/slab.h>
#include <asm/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/control.h>
#include <sound/initval.h>
#include "tm6000.h"
#include "tm6000-regs.h"
#undef dprintk
#define dprintk(level, fmt, arg...) do { \
if (debug >= level) \
printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg); \
} while (0)
/****************************************************************************
Data type declarations - Can be moded to a header file later
****************************************************************************/
struct snd_tm6000_card {
struct snd_card *card;
spinlock_t reg_lock;
atomic_t count;
unsigned int period_size;
unsigned int num_periods;
struct tm6000_core *core;
struct tm6000_buffer *buf;
int bufsize;
struct snd_pcm_substream *substream;
};
/****************************************************************************
Module global static vars
****************************************************************************/
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable tm6000x soundcard. default enabled.");
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for tm6000x capture interface(s).");
/****************************************************************************
Module macros
****************************************************************************/
MODULE_DESCRIPTION("ALSA driver module for tm5600/tm6000/tm6010 based TV cards");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Trident,tm5600},"
"{{Trident,tm6000},"
"{{Trident,tm6010}");
static unsigned int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable debug messages");
/****************************************************************************
Module specific funtions
****************************************************************************/
/*
* BOARD Specific: Sets audio DMA
*/
static int _tm6000_start_audio_dma(struct snd_tm6000_card *chip)
{
struct tm6000_core *core = chip->core;
int val;
/* Enables audio */
val = tm6000_get_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x0);
val |= 0x20;
tm6000_set_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, val);
tm6000_set_reg(core, TM6010_REQ08_R01_A_INIT, 0x80);
return 0;
}
/*
* BOARD Specific: Resets audio DMA
*/
static int _tm6000_stop_audio_dma(struct snd_tm6000_card *chip)
{
struct tm6000_core *core = chip->core;
int val;
dprintk(1, "Stopping audio DMA\n");
/* Enables audio */
val = tm6000_get_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, 0x0);
val &= ~0x20;
tm6000_set_reg(core, TM6010_REQ07_RCC_ACTIVE_VIDEO_IF, val);
tm6000_set_reg(core, TM6010_REQ08_R01_A_INIT, 0);
return 0;
}
static int dsp_buffer_free(struct snd_tm6000_card *chip)
{
BUG_ON(!chip->bufsize);
dprintk(2, "Freeing buffer\n");
/* FIXME: Frees buffer */
chip->bufsize = 0;
return 0;
}
/****************************************************************************
ALSA PCM Interface
****************************************************************************/
/*
* Digital hardware definition
*/
#define DEFAULT_FIFO_SIZE 4096
static struct snd_pcm_hardware snd_tm6000_digital_hw = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
.rate_min = 44100,
.rate_max = 48000,
.channels_min = 2,
.channels_max = 2,
.period_bytes_min = DEFAULT_FIFO_SIZE/4,
.period_bytes_max = DEFAULT_FIFO_SIZE/4,
.periods_min = 1,
.periods_max = 1024,
.buffer_bytes_max = (1024*1024),
};
/*
* audio pcm capture open callback
*/
static int snd_tm6000_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
err = snd_pcm_hw_constraint_pow2(runtime, 0,
SNDRV_PCM_HW_PARAM_PERIODS);
if (err < 0)
goto _error;
chip->substream = substream;
runtime->hw = snd_tm6000_digital_hw;
return 0;
_error:
dprintk(1, "Error opening PCM!\n");
return err;
}
/*
* audio close callback
*/
static int snd_tm6000_close(struct snd_pcm_substream *substream)
{
return 0;
}
/*
* hw_params callback
*/
static int snd_tm6000_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
if (substream->runtime->dma_area) {
dsp_buffer_free(chip);
substream->runtime->dma_area = NULL;
}
chip->period_size = params_period_bytes(hw_params);
chip->num_periods = params_periods(hw_params);
chip->bufsize = chip->period_size * params_periods(hw_params);
BUG_ON(!chip->bufsize);
dprintk(1, "Setting buffer\n");
/* FIXME: Allocate buffer for audio */
return 0;
}
/*
* hw free callback
*/
static int snd_tm6000_hw_free(struct snd_pcm_substream *substream)
{
struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
if (substream->runtime->dma_area) {
dsp_buffer_free(chip);
substream->runtime->dma_area = NULL;
}
return 0;
}
/*
* prepare callback
*/
static int snd_tm6000_prepare(struct snd_pcm_substream *substream)
{
return 0;
}
/*
* trigger callback
*/
static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
int err;
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
err = _tm6000_start_audio_dma(chip);
break;
case SNDRV_PCM_TRIGGER_STOP:
err = _tm6000_stop_audio_dma(chip);
break;
default:
err = -EINVAL;
break;
}
spin_unlock(&chip->reg_lock);
return err;
}
/*
* pointer callback
*/
static snd_pcm_uframes_t snd_tm6000_pointer(struct snd_pcm_substream *substream)
{
struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
u16 count;
count = atomic_read(&chip->count);
return runtime->period_size * (count & (runtime->periods-1));
}
/*
* operators
*/
static struct snd_pcm_ops snd_tm6000_pcm_ops = {
.open = snd_tm6000_pcm_open,
.close = snd_tm6000_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_tm6000_hw_params,
.hw_free = snd_tm6000_hw_free,
.prepare = snd_tm6000_prepare,
.trigger = snd_tm6000_card_trigger,
.pointer = snd_tm6000_pointer,
};
/*
* create a PCM device
*/
static int __devinit snd_tm6000_pcm(struct snd_tm6000_card *chip,
int device, char *name)
{
int err;
struct snd_pcm *pcm;
err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
if (err < 0)
return err;
pcm->private_data = chip;
strcpy(pcm->name, name);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops);
return 0;
}
/* FIXME: Control interface - How to control volume/mute? */
/****************************************************************************
Basic Flow for Sound Devices
****************************************************************************/
/*
* Alsa Constructor - Component probe
*/
int tm6000_audio_init(struct tm6000_core *dev, int idx)
{
struct snd_card *card;
struct snd_tm6000_card *chip;
int rc, len;
char component[14];
if (idx >= SNDRV_CARDS)
return -ENODEV;
if (!enable[idx])
return -ENOENT;
rc = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
if (rc < 0) {
snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
return rc;
}
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (!chip) {
rc = -ENOMEM;
goto error;
}
chip->core = dev;
chip->card = card;
strcpy(card->driver, "tm6000-alsa");
sprintf(component, "USB%04x:%04x",
le16_to_cpu(dev->udev->descriptor.idVendor),
le16_to_cpu(dev->udev->descriptor.idProduct));
snd_component_add(card, component);
if (dev->udev->descriptor.iManufacturer)
len = usb_string(dev->udev,
dev->udev->descriptor.iManufacturer,
card->longname, sizeof(card->longname));
else
len = 0;
if (len > 0)
strlcat(card->longname, " ", sizeof(card->longname));
strlcat(card->longname, card->shortname, sizeof(card->longname));
len = strlcat(card->longname, " at ", sizeof(card->longname));
if (len < sizeof(card->longname))
usb_make_path(dev->udev, card->longname + len,
sizeof(card->longname) - len);
strlcat(card->longname,
dev->udev->speed == USB_SPEED_LOW ? ", low speed" :
dev->udev->speed == USB_SPEED_FULL ? ", full speed" :
", high speed",
sizeof(card->longname));
rc = snd_tm6000_pcm(chip, 0, "tm6000 Digital");
if (rc < 0)
goto error;
rc = snd_card_register(card);
if (rc < 0)
goto error;
return 0;
error:
snd_card_free(card);
return rc;
}
static int tm6000_audio_fini(struct tm6000_core *dev)
{
return 0;
}
struct tm6000_ops audio_ops = {
.id = TM6000_AUDIO,
.name = "TM6000 Audio Extension",
.init = tm6000_audio_init,
.fini = tm6000_audio_fini,
};
static int __init tm6000_alsa_register(void)
{
return tm6000_register_extension(&audio_ops);
}
static void __exit tm6000_alsa_unregister(void)
{
tm6000_unregister_extension(&audio_ops);
}
module_init(tm6000_alsa_register);
module_exit(tm6000_alsa_unregister);
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