/* * * Support for audio capture for tm5600/6000/6010 * (c) 2007-2008 Mauro Carvalho Chehab * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #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 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 "); 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; dprintk(1, "Starting 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_audio_bitrate(core, 48000); 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 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_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_48000, .rate_min = 48000, .rate_max = 48000, .channels_min = 2, .channels_max = 2, .period_bytes_min = 62720, .period_bytes_max = 62720, .periods_min = 1, .periods_max = 1024, .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; 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; } 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; if (!size || !substream) return -EINVAL; runtime = substream->runtime; if (!runtime || !runtime->dma_area) return -EINVAL; buf_pos = chip->buf_pos; stride = runtime->frame_bits >> 3; 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 + size >= runtime->buffer_size * stride) { unsigned int cnt = runtime->buffer_size * stride - buf_pos; memcpy(runtime->dma_area + buf_pos, buf, cnt); memcpy(runtime->dma_area, buf + cnt, size - cnt); } else memcpy(runtime->dma_area + buf_pos, buf, size); chip->buf_pos += size; if (chip->buf_pos >= runtime->buffer_size * stride) chip->buf_pos -= runtime->buffer_size * stride; chip->period_pos += size; if (chip->period_pos >= runtime->period_size) { chip->period_pos -= runtime->period_size; period_elapsed = 1; } 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); _tm6000_stop_audio_dma(chip); 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 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); return chip->buf_pos; } /* * 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 */ /* 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) { 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; 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); rc = snd_card_register(card); if (rc < 0) goto error; dprintk(1,"Registered audio driver for %s\n", card->longname); return 0; error: snd_card_free(card); return rc; } static int tm6000_audio_fini(struct tm6000_core *dev) { struct snd_tm6000_card *chip = dev->adev; if (!dev) return 0; if (!chip) return 0; if (!chip->card) return 0; snd_card_free(chip->card); chip->card = NULL; kfree(chip); dev->adev = NULL; return 0; } 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);