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420 lines
10 KiB
420 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2010-2013 Bluecherry, LLC <https://www.bluecherrydvr.com> |
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* |
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* Original author: |
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* Ben Collins <[email protected]> |
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* |
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* Additional work by: |
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* John Brooks <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/mempool.h> |
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#include <linux/poll.h> |
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#include <linux/kthread.h> |
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#include <linux/freezer.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <sound/core.h> |
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#include <sound/initval.h> |
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#include <sound/pcm.h> |
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#include <sound/control.h> |
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#include "solo6x10.h" |
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#include "solo6x10-tw28.h" |
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#define G723_FDMA_PAGES 32 |
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#define G723_PERIOD_BYTES 48 |
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#define G723_PERIOD_BLOCK 1024 |
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#define G723_FRAMES_PER_PAGE 48 |
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/* Sets up channels 16-19 for decoding and 0-15 for encoding */ |
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#define OUTMODE_MASK 0x300 |
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#define SAMPLERATE 8000 |
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#define BITRATE 25 |
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/* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page |
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* is broken down to 20 * 48 byte regions (one for each channel possible) |
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* with the rest of the page being dummy data. */ |
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#define PERIODS G723_FDMA_PAGES |
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#define G723_INTR_ORDER 4 /* 0 - 4 */ |
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struct solo_snd_pcm { |
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int on; |
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spinlock_t lock; |
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struct solo_dev *solo_dev; |
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u8 *g723_buf; |
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dma_addr_t g723_dma; |
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}; |
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static void solo_g723_config(struct solo_dev *solo_dev) |
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{ |
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int clk_div; |
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clk_div = (solo_dev->clock_mhz * 1000000) |
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/ (SAMPLERATE * (BITRATE * 2) * 2); |
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solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE, |
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SOLO_AUDIO_BITRATE(BITRATE) |
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| SOLO_AUDIO_CLK_DIV(clk_div)); |
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solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR, |
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SOLO_AUDIO_FDMA_INTERVAL(1) |
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| SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER) |
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| SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16)); |
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solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, |
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SOLO_AUDIO_ENABLE |
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| SOLO_AUDIO_I2S_MODE |
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| SOLO_AUDIO_I2S_MULTI(3) |
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| SOLO_AUDIO_MODE(OUTMODE_MASK)); |
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} |
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void solo_g723_isr(struct solo_dev *solo_dev) |
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{ |
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struct snd_pcm_str *pstr = |
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&solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE]; |
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struct snd_pcm_substream *ss; |
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struct solo_snd_pcm *solo_pcm; |
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for (ss = pstr->substream; ss != NULL; ss = ss->next) { |
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if (snd_pcm_substream_chip(ss) == NULL) |
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continue; |
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/* This means open() hasn't been called on this one */ |
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if (snd_pcm_substream_chip(ss) == solo_dev) |
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continue; |
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/* Haven't triggered a start yet */ |
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solo_pcm = snd_pcm_substream_chip(ss); |
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if (!solo_pcm->on) |
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continue; |
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snd_pcm_period_elapsed(ss); |
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} |
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} |
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static const struct snd_pcm_hardware snd_solo_pcm_hw = { |
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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 | |
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SNDRV_PCM_INFO_MMAP_VALID), |
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.formats = SNDRV_PCM_FMTBIT_U8, |
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.rates = SNDRV_PCM_RATE_8000, |
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.rate_min = SAMPLERATE, |
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.rate_max = SAMPLERATE, |
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.channels_min = 1, |
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.channels_max = 1, |
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.buffer_bytes_max = G723_PERIOD_BYTES * PERIODS, |
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.period_bytes_min = G723_PERIOD_BYTES, |
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.period_bytes_max = G723_PERIOD_BYTES, |
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.periods_min = PERIODS, |
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.periods_max = PERIODS, |
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}; |
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static int snd_solo_pcm_open(struct snd_pcm_substream *ss) |
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{ |
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struct solo_dev *solo_dev = snd_pcm_substream_chip(ss); |
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struct solo_snd_pcm *solo_pcm; |
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solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL); |
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if (solo_pcm == NULL) |
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goto oom; |
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solo_pcm->g723_buf = dma_alloc_coherent(&solo_dev->pdev->dev, |
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G723_PERIOD_BYTES, |
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&solo_pcm->g723_dma, |
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GFP_KERNEL); |
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if (solo_pcm->g723_buf == NULL) |
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goto oom; |
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spin_lock_init(&solo_pcm->lock); |
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solo_pcm->solo_dev = solo_dev; |
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ss->runtime->hw = snd_solo_pcm_hw; |
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snd_pcm_substream_chip(ss) = solo_pcm; |
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return 0; |
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oom: |
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kfree(solo_pcm); |
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return -ENOMEM; |
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} |
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static int snd_solo_pcm_close(struct snd_pcm_substream *ss) |
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{ |
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struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); |
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snd_pcm_substream_chip(ss) = solo_pcm->solo_dev; |
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dma_free_coherent(&solo_pcm->solo_dev->pdev->dev, G723_PERIOD_BYTES, |
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solo_pcm->g723_buf, solo_pcm->g723_dma); |
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kfree(solo_pcm); |
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return 0; |
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} |
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static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd) |
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{ |
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struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); |
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struct solo_dev *solo_dev = solo_pcm->solo_dev; |
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int ret = 0; |
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spin_lock(&solo_pcm->lock); |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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if (solo_pcm->on == 0) { |
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/* If this is the first user, switch on interrupts */ |
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if (atomic_inc_return(&solo_dev->snd_users) == 1) |
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solo_irq_on(solo_dev, SOLO_IRQ_G723); |
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solo_pcm->on = 1; |
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} |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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if (solo_pcm->on) { |
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/* If this was our last user, switch them off */ |
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if (atomic_dec_return(&solo_dev->snd_users) == 0) |
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solo_irq_off(solo_dev, SOLO_IRQ_G723); |
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solo_pcm->on = 0; |
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} |
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break; |
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default: |
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ret = -EINVAL; |
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} |
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spin_unlock(&solo_pcm->lock); |
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return ret; |
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} |
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static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss) |
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{ |
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return 0; |
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} |
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static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss) |
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{ |
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struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); |
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struct solo_dev *solo_dev = solo_pcm->solo_dev; |
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snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f; |
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return idx * G723_FRAMES_PER_PAGE; |
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} |
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static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel, |
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unsigned long pos, void __user *dst, |
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unsigned long count) |
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{ |
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struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); |
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struct solo_dev *solo_dev = solo_pcm->solo_dev; |
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int err, i; |
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for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) { |
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int page = (pos / G723_FRAMES_PER_PAGE) + i; |
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err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma, |
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SOLO_G723_EXT_ADDR(solo_dev) + |
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(page * G723_PERIOD_BLOCK) + |
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(ss->number * G723_PERIOD_BYTES), |
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G723_PERIOD_BYTES, 0, 0); |
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if (err) |
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return err; |
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if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES)) |
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return -EFAULT; |
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dst += G723_PERIOD_BYTES; |
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} |
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return 0; |
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} |
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static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel, |
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unsigned long pos, void *dst, |
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unsigned long count) |
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{ |
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struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); |
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struct solo_dev *solo_dev = solo_pcm->solo_dev; |
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int err, i; |
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for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) { |
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int page = (pos / G723_FRAMES_PER_PAGE) + i; |
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err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma, |
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SOLO_G723_EXT_ADDR(solo_dev) + |
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(page * G723_PERIOD_BLOCK) + |
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(ss->number * G723_PERIOD_BYTES), |
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G723_PERIOD_BYTES, 0, 0); |
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if (err) |
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return err; |
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memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES); |
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dst += G723_PERIOD_BYTES; |
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} |
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return 0; |
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} |
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static const struct snd_pcm_ops snd_solo_pcm_ops = { |
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.open = snd_solo_pcm_open, |
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.close = snd_solo_pcm_close, |
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.prepare = snd_solo_pcm_prepare, |
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.trigger = snd_solo_pcm_trigger, |
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.pointer = snd_solo_pcm_pointer, |
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.copy_user = snd_solo_pcm_copy_user, |
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.copy_kernel = snd_solo_pcm_copy_kernel, |
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}; |
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static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_info *info) |
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{ |
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info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
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info->count = 1; |
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info->value.integer.min = 0; |
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info->value.integer.max = 15; |
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info->value.integer.step = 1; |
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return 0; |
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} |
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static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *value) |
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{ |
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struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol); |
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u8 ch = value->id.numid - 1; |
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value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch); |
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return 0; |
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} |
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static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol, |
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struct snd_ctl_elem_value *value) |
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{ |
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struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol); |
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u8 ch = value->id.numid - 1; |
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u8 old_val; |
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old_val = tw28_get_audio_gain(solo_dev, ch); |
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if (old_val == value->value.integer.value[0]) |
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return 0; |
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tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]); |
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return 1; |
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} |
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static const struct snd_kcontrol_new snd_solo_capture_volume = { |
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
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.name = "Capture Volume", |
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.info = snd_solo_capture_volume_info, |
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.get = snd_solo_capture_volume_get, |
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.put = snd_solo_capture_volume_put, |
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}; |
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static int solo_snd_pcm_init(struct solo_dev *solo_dev) |
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{ |
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struct snd_card *card = solo_dev->snd_card; |
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struct snd_pcm *pcm; |
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struct snd_pcm_substream *ss; |
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int ret; |
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int i; |
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ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans, |
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&pcm); |
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if (ret < 0) |
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return ret; |
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, |
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&snd_solo_pcm_ops); |
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snd_pcm_chip(pcm) = solo_dev; |
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pcm->info_flags = 0; |
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strscpy(pcm->name, card->shortname, sizeof(pcm->name)); |
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for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; |
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ss; ss = ss->next, i++) |
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sprintf(ss->name, "Camera #%d Audio", i); |
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snd_pcm_set_managed_buffer_all(pcm, |
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SNDRV_DMA_TYPE_CONTINUOUS, |
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NULL, |
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G723_PERIOD_BYTES * PERIODS, |
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G723_PERIOD_BYTES * PERIODS); |
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solo_dev->snd_pcm = pcm; |
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return 0; |
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} |
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int solo_g723_init(struct solo_dev *solo_dev) |
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{ |
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static struct snd_device_ops ops = { }; |
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struct snd_card *card; |
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struct snd_kcontrol_new kctl; |
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char name[32]; |
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int ret; |
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atomic_set(&solo_dev->snd_users, 0); |
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/* Allows for easier mapping between video and audio */ |
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sprintf(name, "Softlogic%d", solo_dev->vfd->num); |
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ret = snd_card_new(&solo_dev->pdev->dev, |
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SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0, |
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&solo_dev->snd_card); |
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if (ret < 0) |
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return ret; |
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card = solo_dev->snd_card; |
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strscpy(card->driver, SOLO6X10_NAME, sizeof(card->driver)); |
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strscpy(card->shortname, "SOLO-6x10 Audio", sizeof(card->shortname)); |
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sprintf(card->longname, "%s on %s IRQ %d", card->shortname, |
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pci_name(solo_dev->pdev), solo_dev->pdev->irq); |
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ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops); |
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if (ret < 0) |
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goto snd_error; |
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/* Mixer controls */ |
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strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername)); |
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kctl = snd_solo_capture_volume; |
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kctl.count = solo_dev->nr_chans; |
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ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev)); |
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if (ret < 0) |
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goto snd_error; |
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ret = solo_snd_pcm_init(solo_dev); |
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if (ret < 0) |
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goto snd_error; |
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ret = snd_card_register(card); |
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if (ret < 0) |
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goto snd_error; |
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solo_g723_config(solo_dev); |
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dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name); |
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return 0; |
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snd_error: |
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snd_card_free(card); |
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return ret; |
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} |
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void solo_g723_exit(struct solo_dev *solo_dev) |
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{ |
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if (!solo_dev->snd_card) |
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return; |
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solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0); |
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solo_irq_off(solo_dev, SOLO_IRQ_G723); |
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snd_card_free(solo_dev->snd_card); |
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solo_dev->snd_card = NULL; |
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}
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