// 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 <bcollins@ubuntu.com>
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*
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* Additional work by:
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* John Brooks <john.brooks@bluecherry.net>
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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 = pci_alloc_consistent(solo_dev->pdev,
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G723_PERIOD_BYTES,
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&solo_pcm->g723_dma);
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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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pci_free_consistent(solo_pcm->solo_dev->pdev, 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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