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/* |
#define __NO_VERSION__ |
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* Vortex PCM ALSA driver. |
#include "../../alsa-kernel/pci/au88x0/au88x0_pcm.c" |
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* |
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* Supports ADB and WT DMA. Unfortunately, WT routing is still a |
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* mistery. To discover that, we need to disassemble the windoze |
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* driver too. |
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* |
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* |
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*/ |
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#include <sound/driver.h> |
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#include <linux/time.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 "au88x0.h" |
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#define chip_t vortex_t |
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/* hardware definition */ |
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static snd_pcm_hardware_t snd_vortex_playback_hw_adb = { |
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_RESUME| SNDRV_PCM_INFO_PAUSE | |
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SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP_VALID), |
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 | |
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SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW, |
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.rates = SNDRV_PCM_RATE_CONTINUOUS, |
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.rate_min = 5000, |
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.rate_max = 48000, |
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.channels_min = 1, |
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.channels_max = 2, |
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.buffer_bytes_max = 0x10000, |
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.period_bytes_min = 0x0100, |
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.period_bytes_max = 0x1000, |
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.periods_min = 1, |
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.periods_max = 64, |
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}; |
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static snd_pcm_hardware_t snd_vortex_playback_hw_wt = { |
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.info = (SNDRV_PCM_INFO_MMAP | |
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SNDRV_PCM_INFO_INTERLEAVED | |
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SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID), |
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.formats = SNDRV_PCM_FMTBIT_S16_LE, |
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.rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS, // SNDRV_PCM_RATE_48000, |
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.rate_min = 8000, |
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.rate_max = 48000, |
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.channels_min = 1, |
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.channels_max = 2, |
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.buffer_bytes_max = 0x10000, |
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.period_bytes_min = 0x0400, |
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.period_bytes_max = 0x1000, |
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.periods_min = 1, |
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.periods_max = 64, |
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}; |
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/* open callback */ |
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static int snd_vortex_pcm_open(snd_pcm_substream_t *substream) { |
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chip_t *chip = snd_pcm_substream_chip(substream); |
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snd_pcm_runtime_t *runtime = substream->runtime; |
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int dma, err; |
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/* Force equal size periods */ |
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if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) |
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return err; |
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/* Force DMA 32 bit alignment */ |
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if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4)) < 0) |
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return err; |
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if (substream->pcm == chip->pcm_adb) { |
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runtime->hw = snd_vortex_playback_hw_adb; |
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dma = vortex_getadb(chip); |
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if (dma < 0) |
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return -EBUSY; |
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substream->runtime->private_data = &chip->dma_adb[dma]; |
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chip->dma_adb[dma].substream = substream; |
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} else { |
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runtime->hw = snd_vortex_playback_hw_wt; |
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dma = vortex_getwt(chip); |
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if (dma < 0) |
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return -EBUSY; |
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substream->runtime->private_data = &chip->dma_wt[dma]; |
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chip->dma_wt[dma].substream = substream; |
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} |
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return 0; |
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} |
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/* close callback */ |
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static int snd_vortex_pcm_close(snd_pcm_substream_t *substream) { |
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//vortex_t *chip = snd_pcm_substream_chip(substream); |
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dma_t *dma = (dma_t*)substream->runtime->private_data; |
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// the hardware-specific codes will be here |
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// Dealloc DMA and remove audio route. |
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dma->substream = NULL; |
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dma->nr_ch = 0; |
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substream->runtime->private_data = NULL; |
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return 0; |
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} |
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/* hw_params callback */ |
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static int snd_vortex_pcm_hw_params(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *hw_params) { |
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chip_t *chip = snd_pcm_substream_chip(substream); |
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snd_pcm_runtime_t *runtime = substream->runtime; |
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dma_t *dma = (dma_t*)substream->runtime->private_data; |
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int err; |
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// Alloc buffer memory. |
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err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); |
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if (err < 0) { |
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printk(KERN_ERR "Vortex: pcm page alloc failed!\n"); |
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return err; |
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} |
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printk(KERN_INFO "Vortex: periods %d, period_bytes %d, channels = %d\n", params_periods(hw_params), |
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params_period_bytes(hw_params), params_channels(hw_params)); |
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if (params_buffer_bytes(hw_params) != (params_periods(hw_params)*params_period_bytes(hw_params))) |
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printk(KERN_INFO "vortex: Warning: Click condition (non integer period count).\n"); |
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// Make audio routes and config buffer DMA. |
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if (substream->pcm == chip->pcm_adb) { |
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vortex_adbdma_setbuffers(chip, dma->dma, (u32)(runtime->dma_addr), params_period_bytes(hw_params), params_periods(hw_params)); |
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//if (dma->nr_ch != 0) |
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vortex_adb_waveroute(chip, dma->dma, 0); |
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//if (params_channels(hw_params) != 0) |
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vortex_adb_waveroute(chip, dma->dma, params_channels(hw_params)); |
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} else { |
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vortex_wtdma_setbuffers(chip, dma->dma, (u32)(runtime->dma_addr), params_period_bytes(hw_params), params_periods(hw_params)); |
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if (dma->nr_ch) |
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vortex_wt_waveroute(chip, dma->dma, 0); |
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if (params_channels(hw_params)) |
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vortex_wt_waveroute(chip, dma->dma, params_channels(hw_params)); |
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} |
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return 0; |
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} |
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/* hw_free callback */ |
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static int snd_vortex_pcm_hw_free(snd_pcm_substream_t *substream) { |
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chip_t *chip = snd_pcm_substream_chip(substream); |
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dma_t *dma = (dma_t*)substream->runtime->private_data; |
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// Delete audio routes. |
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if (substream->pcm == chip->pcm_adb) |
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vortex_adb_waveroute(chip, dma->dma, 0); |
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else |
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vortex_wt_waveroute(chip, dma->dma, 0); |
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return snd_pcm_lib_free_pages(substream); |
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} |
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/* prepare callback */ |
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static int snd_vortex_pcm_prepare(snd_pcm_substream_t *substream) { |
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vortex_t *chip = snd_pcm_substream_chip(substream); |
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snd_pcm_runtime_t *runtime = substream->runtime; |
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dma_t *dma = (dma_t*)substream->runtime->private_data; |
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int fmt, dir; |
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// set up the hardware with the current configuration. |
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
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dir = 1; |
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else |
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dir = 0; |
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fmt = vortex_alsafmt_aspfmt(runtime->format); |
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if (substream->pcm == chip->pcm_adb) { |
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vortex_adbdma_setmode(chip, dma->dma, 1, dir, fmt, 0/*?*/, 0); |
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vortex_adbdma_setstartbuffer(chip, dma->dma, 0); |
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vortex_adb_setsrc(chip, dma->dma, runtime->rate, dir); |
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} else { |
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vortex_wtdma_setmode(chip, dma->dma, 1, dir, fmt, 0, 0); |
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// FIXME: Set rate (i guess using vortex_wt_writereg() somehow). |
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vortex_wtdma_setstartbuffer(chip, dma->dma, 0); |
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} |
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return 0; |
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} |
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/* trigger callback */ |
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static int snd_vortex_pcm_trigger(snd_pcm_substream_t *substream, int cmd) { |
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chip_t *chip = snd_pcm_substream_chip(substream); |
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dma_t *dma = (dma_t*)substream->runtime->private_data; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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// do something to start the PCM engine |
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printk(KERN_INFO "vortex: start %d\n", dma->dma); |
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if (substream->pcm == chip->pcm_adb) { |
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dma->fifo_enabled = 1; |
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vortex_adbdma_startfifo(chip, dma->dma); |
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} else { |
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dma->fifo_enabled = 1; |
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vortex_wtdma_startfifo(chip, dma->dma); |
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} |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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// do something to stop the PCM engine |
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printk(KERN_INFO "vortex: stop %d\n", dma->dma); |
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if (substream->pcm == chip->pcm_adb) { |
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dma->fifo_enabled = 0; |
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vortex_adbdma_stopfifo(chip, dma->dma); |
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} |
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else { |
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dma->fifo_enabled = 0; |
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vortex_wtdma_stopfifo(chip, dma->dma); |
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} |
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break; |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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printk(KERN_INFO "vortex: pause %d\n", dma->dma); |
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if (substream->pcm == chip->pcm_adb) |
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vortex_adbdma_pausefifo(chip, dma->dma); |
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else |
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vortex_wtdma_pausefifo(chip, dma->dma); |
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break; |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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printk(KERN_INFO "vortex: resume %d\n", dma->dma); |
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if (substream->pcm == chip->pcm_adb) |
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vortex_adbdma_resumefifo(chip, dma->dma); |
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else |
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vortex_wtdma_resumefifo(chip, dma->dma); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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/* pointer callback */ |
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static snd_pcm_uframes_t snd_vortex_pcm_pointer(snd_pcm_substream_t *substream) { |
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vortex_t *chip = snd_pcm_substream_chip(substream); |
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snd_pcm_uframes_t current_ptr = 0; |
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dma_t *dma = (dma_t*)substream->runtime->private_data; |
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spin_lock(&chip->lock); |
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if (substream->pcm == chip->pcm_adb) |
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current_ptr = vortex_adbdma_getlinearpos(chip, dma->dma); |
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else |
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current_ptr = vortex_wtdma_getlinearpos(chip, dma->dma); |
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//printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr); |
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spin_unlock(&chip->lock); |
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return (bytes_to_frames(substream->runtime, current_ptr)); |
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} |
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/* operators */ |
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static snd_pcm_ops_t snd_vortex_playback_ops = { |
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.open = snd_vortex_pcm_open, |
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.close = snd_vortex_pcm_close, |
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.ioctl = snd_pcm_lib_ioctl, |
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.hw_params = snd_vortex_pcm_hw_params, |
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.hw_free = snd_vortex_pcm_hw_free, |
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.prepare = snd_vortex_pcm_prepare, |
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.trigger = snd_vortex_pcm_trigger, |
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.pointer = snd_vortex_pcm_pointer, |
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//.page = snd_pcm_sgbuf_ops_page, |
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}; |
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/* |
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* definitions of capture are omitted here... |
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*/ |
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/* create a pcm device */ |
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int __devinit snd_vortex_new_pcm(vortex_t *chip, int idx, int nr) { |
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snd_pcm_t *pcm; |
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int err; |
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if ((chip == 0)||(idx < 0)||(idx>1)) |
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return -ENODEV; |
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if (idx == 0) { |
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if ((err = snd_pcm_new(chip->card, "Aureal Vortex ADB", idx, nr, nr, &pcm)) < 0) |
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return err; |
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strcpy(pcm->name, "adb"); |
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chip->pcm_adb = pcm; |
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} else { |
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if ((err = snd_pcm_new(chip->card, "Aureal Vortex WT", idx, nr, 0, &pcm)) < 0) |
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return err; |
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strcpy(pcm->name, "wt"); |
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chip->pcm_wt = pcm; |
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} |
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pcm->private_data = chip; |
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/* set operators */ |
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_vortex_playback_ops); |
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if (idx == 0) |
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_vortex_playback_ops); |
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/* pre-allocation of buffers */ |
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snd_pcm_lib_preallocate_pci_pages_for_all(chip->pci_dev, pcm, 0x10000, 0x10000); |
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return 0; |
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} |
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