diff options
Diffstat (limited to 'drivers/media/usb/tm6000/tm6000-alsa.c')
| -rw-r--r-- | drivers/media/usb/tm6000/tm6000-alsa.c | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/drivers/media/usb/tm6000/tm6000-alsa.c b/drivers/media/usb/tm6000/tm6000-alsa.c new file mode 100644 index 000000000000..813c1ec53608 --- /dev/null +++ b/drivers/media/usb/tm6000/tm6000-alsa.c @@ -0,0 +1,529 @@ +/* + * + * 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 <linux/vmalloc.h> + +#include <linux/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) + +/**************************************************************************** + Module global static vars + ****************************************************************************/ + +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ + +static bool 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; + + dprintk(1, "Starting audio DMA\n"); + + /* Enables audio */ + tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x40, 0x40); + + tm6000_set_audio_bitrate(core, 48000); + + return 0; +} + +/* + * BOARD Specific: Resets audio DMA + */ +static int _tm6000_stop_audio_dma(struct snd_tm6000_card *chip) +{ + struct tm6000_core *core = chip->core; + + dprintk(1, "Stopping audio DMA\n"); + + /* Disables audio */ + tm6000_set_reg_mask(core, TM6010_REQ07_RCC_ACTIVE_IF, 0x00, 0x40); + + return 0; +} + +static void dsp_buffer_free(struct snd_pcm_substream *substream) +{ + struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); + + dprintk(2, "Freeing buffer\n"); + + vfree(substream->runtime->dma_area); + substream->runtime->dma_area = NULL; + substream->runtime->dma_bytes = 0; +} + +static int dsp_buffer_alloc(struct snd_pcm_substream *substream, int size) +{ + struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); + + dprintk(2, "Allocating buffer\n"); + + if (substream->runtime->dma_area) { + if (substream->runtime->dma_bytes > size) + return 0; + + dsp_buffer_free(substream); + } + + substream->runtime->dma_area = vmalloc(size); + if (!substream->runtime->dma_area) + return -ENOMEM; + + substream->runtime->dma_bytes = size; + + 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_BATCH | + 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_CONTINUOUS | SNDRV_PCM_RATE_KNOT, + .rate_min = 48000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .period_bytes_min = 64, + .period_bytes_max = 12544, + .periods_min = 2, + .periods_max = 98, + .buffer_bytes_max = 62720 * 8, +}; + +/* + * 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; + snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + + return 0; +_error: + dprintk(1, "Error opening PCM!\n"); + return err; +} + +/* + * audio close callback + */ +static int snd_tm6000_close(struct snd_pcm_substream *substream) +{ + struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); + struct tm6000_core *core = chip->core; + + if (atomic_read(&core->stream_started) > 0) { + atomic_set(&core->stream_started, 0); + schedule_work(&core->wq_trigger); + } + + return 0; +} + +static int tm6000_fillbuf(struct tm6000_core *core, char *buf, int size) +{ + struct snd_tm6000_card *chip = core->adev; + struct snd_pcm_substream *substream = chip->substream; + struct snd_pcm_runtime *runtime; + int period_elapsed = 0; + unsigned int stride, buf_pos; + int length; + + if (atomic_read(&core->stream_started) == 0) + return 0; + + if (!size || !substream) { + dprintk(1, "substream was NULL\n"); + return -EINVAL; + } + + runtime = substream->runtime; + if (!runtime || !runtime->dma_area) { + dprintk(1, "runtime was NULL\n"); + return -EINVAL; + } + + buf_pos = chip->buf_pos; + stride = runtime->frame_bits >> 3; + + if (stride == 0) { + dprintk(1, "stride is zero\n"); + return -EINVAL; + } + + length = size / stride; + if (length == 0) { + dprintk(1, "%s: length was zero\n", __func__); + return -EINVAL; + } + + dprintk(1, "Copying %d bytes at %p[%d] - buf size=%d x %d\n", size, + runtime->dma_area, buf_pos, + (unsigned int)runtime->buffer_size, stride); + + if (buf_pos + length >= runtime->buffer_size) { + unsigned int cnt = runtime->buffer_size - buf_pos; + memcpy(runtime->dma_area + buf_pos * stride, buf, cnt * stride); + memcpy(runtime->dma_area, buf + cnt * stride, + length * stride - cnt * stride); + } else + memcpy(runtime->dma_area + buf_pos * stride, buf, + length * stride); + + snd_pcm_stream_lock(substream); + + chip->buf_pos += length; + if (chip->buf_pos >= runtime->buffer_size) + chip->buf_pos -= runtime->buffer_size; + + chip->period_pos += length; + if (chip->period_pos >= runtime->period_size) { + chip->period_pos -= runtime->period_size; + period_elapsed = 1; + } + + snd_pcm_stream_unlock(substream); + + if (period_elapsed) + snd_pcm_period_elapsed(substream); + + return 0; +} + +/* + * hw_params callback + */ +static int snd_tm6000_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + int size, rc; + + size = params_period_bytes(hw_params) * params_periods(hw_params); + + rc = dsp_buffer_alloc(substream, size); + if (rc < 0) + return rc; + + 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); + struct tm6000_core *core = chip->core; + + if (atomic_read(&core->stream_started) > 0) { + atomic_set(&core->stream_started, 0); + schedule_work(&core->wq_trigger); + } + + dsp_buffer_free(substream); + return 0; +} + +/* + * prepare callback + */ +static int snd_tm6000_prepare(struct snd_pcm_substream *substream) +{ + struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); + + chip->buf_pos = 0; + chip->period_pos = 0; + + return 0; +} + + +/* + * trigger callback + */ +static void audio_trigger(struct work_struct *work) +{ + struct tm6000_core *core = container_of(work, struct tm6000_core, + wq_trigger); + struct snd_tm6000_card *chip = core->adev; + + if (atomic_read(&core->stream_started)) { + dprintk(1, "starting capture"); + _tm6000_start_audio_dma(chip); + } else { + dprintk(1, "stopping capture"); + _tm6000_stop_audio_dma(chip); + } +} + +static int snd_tm6000_card_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_tm6000_card *chip = snd_pcm_substream_chip(substream); + struct tm6000_core *core = chip->core; + int err = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ + case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ + case SNDRV_PCM_TRIGGER_START: + atomic_set(&core->stream_started, 1); + break; + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ + case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ + case SNDRV_PCM_TRIGGER_STOP: + atomic_set(&core->stream_started, 0); + break; + default: + err = -EINVAL; + break; + } + schedule_work(&core->wq_trigger); + + 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); + + return chip->buf_pos; +} + +static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, + unsigned long offset) +{ + void *pageptr = subs->runtime->dma_area + offset; + + return vmalloc_to_page(pageptr); +} + +/* + * 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, + .page = snd_pcm_get_vmalloc_page, +}; + +/* + * create a PCM device + */ + +/* FIXME: Control interface - How to control volume/mute? */ + +/**************************************************************************** + Basic Flow for Sound Devices + ****************************************************************************/ + +/* + * Alsa Constructor - Component probe + */ +static int tm6000_audio_init(struct tm6000_core *dev) +{ + struct snd_card *card; + struct snd_tm6000_card *chip; + int rc; + static int devnr; + char component[14]; + struct snd_pcm *pcm; + + if (!dev) + return 0; + + if (devnr >= SNDRV_CARDS) + return -ENODEV; + + if (!enable[devnr]) + return -ENOENT; + + rc = snd_card_create(index[devnr], "tm6000", THIS_MODULE, 0, &card); + if (rc < 0) { + snd_printk(KERN_ERR "cannot create card instance %d\n", devnr); + return rc; + } + strcpy(card->driver, "tm6000-alsa"); + strcpy(card->shortname, "TM5600/60x0"); + sprintf(card->longname, "TM5600/60x0 Audio at bus %d device %d", + dev->udev->bus->busnum, dev->udev->devnum); + + sprintf(component, "USB%04x:%04x", + le16_to_cpu(dev->udev->descriptor.idVendor), + le16_to_cpu(dev->udev->descriptor.idProduct)); + snd_component_add(card, component); + snd_card_set_dev(card, &dev->udev->dev); + + chip = kzalloc(sizeof(struct snd_tm6000_card), GFP_KERNEL); + if (!chip) { + rc = -ENOMEM; + goto error; + } + + chip->core = dev; + chip->card = card; + dev->adev = chip; + spin_lock_init(&chip->reg_lock); + + rc = snd_pcm_new(card, "TM6000 Audio", 0, 0, 1, &pcm); + if (rc < 0) + goto error_chip; + + pcm->info_flags = 0; + pcm->private_data = chip; + strcpy(pcm->name, "Trident TM5600/60x0"); + + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_tm6000_pcm_ops); + + INIT_WORK(&dev->wq_trigger, audio_trigger); + rc = snd_card_register(card); + if (rc < 0) + goto error_chip; + + dprintk(1, "Registered audio driver for %s\n", card->longname); + + return 0; + +error_chip: + kfree(chip); + dev->adev = NULL; +error: + snd_card_free(card); + return rc; +} + +static int tm6000_audio_fini(struct tm6000_core *dev) +{ + struct snd_tm6000_card *chip; + + if (!dev) + return 0; + chip = dev->adev; + + if (!chip) + return 0; + + if (!chip->card) + return 0; + + snd_card_free(chip->card); + chip->card = NULL; + kfree(chip); + dev->adev = NULL; + + return 0; +} + +static struct tm6000_ops audio_ops = { + .type = TM6000_AUDIO, + .name = "TM6000 Audio Extension", + .init = tm6000_audio_init, + .fini = tm6000_audio_fini, + .fillbuf = tm6000_fillbuf, +}; + +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); |