diff options
Diffstat (limited to 'drivers/staging/tm6000/tm6000-alsa.c')
-rw-r--r-- | drivers/staging/tm6000/tm6000-alsa.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/drivers/staging/tm6000/tm6000-alsa.c b/drivers/staging/tm6000/tm6000-alsa.c new file mode 100644 index 000000000000..bc89f9d28002 --- /dev/null +++ b/drivers/staging/tm6000/tm6000-alsa.c @@ -0,0 +1,414 @@ +/* + * + * 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 <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; +} +EXPORT_SYMBOL_GPL(tm6000_audio_init); + |