/* * Renesas R-Car SRU/SCU/SSIU/SSI support * * Copyright (C) 2013 Renesas Solutions Corp. * Kuninori Morimoto * * Based on fsi.c * Kuninori Morimoto * * 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. */ /* * Renesas R-Car sound device structure * * Gen1 * * SRU : Sound Routing Unit * - SRC : Sampling Rate Converter * - CMD * - CTU : Channel Count Conversion Unit * - MIX : Mixer * - DVC : Digital Volume and Mute Function * - SSI : Serial Sound Interface * * Gen2 * * SCU : Sampling Rate Converter Unit * - SRC : Sampling Rate Converter * - CMD * - CTU : Channel Count Conversion Unit * - MIX : Mixer * - DVC : Digital Volume and Mute Function * SSIU : Serial Sound Interface Unit * - SSI : Serial Sound Interface */ /* * driver data Image * * rsnd_priv * | * | ** this depends on Gen1/Gen2 * | * +- gen * | * | ** these depend on data path * | ** gen and platform data control it * | * +- rdai[0] * | | sru ssiu ssi * | +- playback -> [mod] -> [mod] -> [mod] -> ... * | | * | | sru ssiu ssi * | +- capture -> [mod] -> [mod] -> [mod] -> ... * | * +- rdai[1] * | | sru ssiu ssi * | +- playback -> [mod] -> [mod] -> [mod] -> ... * | | * | | sru ssiu ssi * | +- capture -> [mod] -> [mod] -> [mod] -> ... * ... * | * | ** these control ssi * | * +- ssi * | | * | +- ssi[0] * | +- ssi[1] * | +- ssi[2] * | ... * | * | ** these control scu * | * +- scu * | * +- scu[0] * +- scu[1] * +- scu[2] * ... * * * for_each_rsnd_dai(xx, priv, xx) * rdai[0] => rdai[1] => rdai[2] => ... * * for_each_rsnd_mod(xx, rdai, xx) * [mod] => [mod] => [mod] => ... * * rsnd_dai_call(xxx, fn ) * [mod]->fn() -> [mod]->fn() -> [mod]->fn()... * */ #include #include "rsnd.h" #define RSND_RATES SNDRV_PCM_RATE_8000_96000 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE) /* * rsnd_platform functions */ #define rsnd_platform_call(priv, dai, func, param...) \ (!(priv->info->func) ? 0 : \ priv->info->func(param)) /* * rsnd_mod functions */ char *rsnd_mod_name(struct rsnd_mod *mod) { if (!mod || !mod->ops) return "unknown"; return mod->ops->name; } void rsnd_mod_init(struct rsnd_priv *priv, struct rsnd_mod *mod, struct rsnd_mod_ops *ops, int id) { mod->priv = priv; mod->id = id; mod->ops = ops; INIT_LIST_HEAD(&mod->list); } /* * rsnd_dma functions */ static void rsnd_dma_continue(struct rsnd_dma *dma) { /* push next A or B plane */ dma->submit_loop = 1; schedule_work(&dma->work); } void rsnd_dma_start(struct rsnd_dma *dma) { /* push both A and B plane*/ dma->submit_loop = 2; schedule_work(&dma->work); } void rsnd_dma_stop(struct rsnd_dma *dma) { dma->submit_loop = 0; cancel_work_sync(&dma->work); dmaengine_terminate_all(dma->chan); } static void rsnd_dma_complete(void *data) { struct rsnd_dma *dma = (struct rsnd_dma *)data; struct rsnd_priv *priv = dma->priv; unsigned long flags; rsnd_lock(priv, flags); dma->complete(dma); if (dma->submit_loop) rsnd_dma_continue(dma); rsnd_unlock(priv, flags); } static void rsnd_dma_do_work(struct work_struct *work) { struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work); struct rsnd_priv *priv = dma->priv; struct device *dev = rsnd_priv_to_dev(priv); struct dma_async_tx_descriptor *desc; dma_addr_t buf; size_t len; int i; for (i = 0; i < dma->submit_loop; i++) { if (dma->inquiry(dma, &buf, &len) < 0) return; desc = dmaengine_prep_slave_single( dma->chan, buf, len, dma->dir, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc) { dev_err(dev, "dmaengine_prep_slave_sg() fail\n"); return; } desc->callback = rsnd_dma_complete; desc->callback_param = dma; if (dmaengine_submit(desc) < 0) { dev_err(dev, "dmaengine_submit() fail\n"); return; } } dma_async_issue_pending(dma->chan); } int rsnd_dma_available(struct rsnd_dma *dma) { return !!dma->chan; } static bool rsnd_dma_filter(struct dma_chan *chan, void *param) { chan->private = param; return true; } int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma, int is_play, int id, int (*inquiry)(struct rsnd_dma *dma, dma_addr_t *buf, int *len), int (*complete)(struct rsnd_dma *dma)) { struct device *dev = rsnd_priv_to_dev(priv); dma_cap_mask_t mask; if (dma->chan) { dev_err(dev, "it already has dma channel\n"); return -EIO; } dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); dma->slave.shdma_slave.slave_id = id; dma->chan = dma_request_channel(mask, rsnd_dma_filter, &dma->slave.shdma_slave); if (!dma->chan) { dev_err(dev, "can't get dma channel\n"); return -EIO; } dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE; dma->priv = priv; dma->inquiry = inquiry; dma->complete = complete; INIT_WORK(&dma->work, rsnd_dma_do_work); return 0; } void rsnd_dma_quit(struct rsnd_priv *priv, struct rsnd_dma *dma) { if (dma->chan) dma_release_channel(dma->chan); dma->chan = NULL; } /* * rsnd_dai functions */ #define rsnd_dai_call(rdai, io, fn) \ ({ \ struct rsnd_mod *mod, *n; \ int ret = 0; \ for_each_rsnd_mod(mod, n, io) { \ ret = rsnd_mod_call(mod, fn, rdai, io); \ if (ret < 0) \ break; \ } \ ret; \ }) int rsnd_dai_connect(struct rsnd_dai *rdai, struct rsnd_mod *mod, struct rsnd_dai_stream *io) { struct rsnd_priv *priv = rsnd_mod_to_priv(mod); struct device *dev = rsnd_priv_to_dev(priv); if (!mod) { dev_err(dev, "NULL mod\n"); return -EIO; } if (!list_empty(&mod->list)) { dev_err(dev, "%s%d is not empty\n", rsnd_mod_name(mod), rsnd_mod_id(mod)); return -EIO; } list_add_tail(&mod->list, &io->head); return 0; } int rsnd_dai_disconnect(struct rsnd_mod *mod) { list_del_init(&mod->list); return 0; } int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai) { int id = rdai - priv->rdai; if ((id < 0) || (id >= rsnd_dai_nr(priv))) return -EINVAL; return id; } struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id) { if ((id < 0) || (id >= rsnd_dai_nr(priv))) return NULL; return priv->rdai + id; } static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai) { struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); return rsnd_dai_get(priv, dai->id); } int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io) { return &rdai->playback == io; } /* * rsnd_soc_dai functions */ int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional) { struct snd_pcm_substream *substream = io->substream; struct snd_pcm_runtime *runtime = substream->runtime; int pos = io->byte_pos + additional; pos %= (runtime->periods * io->byte_per_period); return pos; } void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte) { io->byte_pos += byte; if (io->byte_pos >= io->next_period_byte) { struct snd_pcm_substream *substream = io->substream; struct snd_pcm_runtime *runtime = substream->runtime; io->period_pos++; io->next_period_byte += io->byte_per_period; if (io->period_pos >= runtime->periods) { io->byte_pos = 0; io->period_pos = 0; io->next_period_byte = io->byte_per_period; } snd_pcm_period_elapsed(substream); } } static int rsnd_dai_stream_init(struct rsnd_dai_stream *io, struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; if (!list_empty(&io->head)) return -EIO; INIT_LIST_HEAD(&io->head); io->substream = substream; io->byte_pos = 0; io->period_pos = 0; io->byte_per_period = runtime->period_size * runtime->channels * samples_to_bytes(runtime, 1); io->next_period_byte = io->byte_per_period; return 0; } static struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = substream->private_data; return rtd->cpu_dai; } static struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai, struct snd_pcm_substream *substream) { if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) return &rdai->playback; else return &rdai->capture; } static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv, rsnd_dai_id(priv, rdai), rsnd_dai_is_play(rdai, io)); int ssi_id = rsnd_mod_id(mod); int ret; unsigned long flags; rsnd_lock(priv, flags); switch (cmd) { case SNDRV_PCM_TRIGGER_START: ret = rsnd_dai_stream_init(io, substream); if (ret < 0) goto dai_trigger_end; ret = rsnd_platform_call(priv, dai, start, ssi_id); if (ret < 0) goto dai_trigger_end; ret = rsnd_gen_path_init(priv, rdai, io); if (ret < 0) goto dai_trigger_end; ret = rsnd_dai_call(rdai, io, init); if (ret < 0) goto dai_trigger_end; ret = rsnd_dai_call(rdai, io, start); if (ret < 0) goto dai_trigger_end; break; case SNDRV_PCM_TRIGGER_STOP: ret = rsnd_dai_call(rdai, io, stop); if (ret < 0) goto dai_trigger_end; ret = rsnd_dai_call(rdai, io, quit); if (ret < 0) goto dai_trigger_end; ret = rsnd_gen_path_exit(priv, rdai, io); if (ret < 0) goto dai_trigger_end; ret = rsnd_platform_call(priv, dai, stop, ssi_id); if (ret < 0) goto dai_trigger_end; break; default: ret = -EINVAL; } dai_trigger_end: rsnd_unlock(priv, flags); return ret; } static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); /* set master/slave audio interface */ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { case SND_SOC_DAIFMT_CBM_CFM: rdai->clk_master = 1; break; case SND_SOC_DAIFMT_CBS_CFS: rdai->clk_master = 0; break; default: return -EINVAL; } /* set clock inversion */ switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_NB_IF: rdai->bit_clk_inv = 0; rdai->frm_clk_inv = 1; break; case SND_SOC_DAIFMT_IB_NF: rdai->bit_clk_inv = 1; rdai->frm_clk_inv = 0; break; case SND_SOC_DAIFMT_IB_IF: rdai->bit_clk_inv = 1; rdai->frm_clk_inv = 1; break; case SND_SOC_DAIFMT_NB_NF: default: rdai->bit_clk_inv = 0; rdai->frm_clk_inv = 0; break; } /* set format */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_I2S: rdai->sys_delay = 0; rdai->data_alignment = 0; break; case SND_SOC_DAIFMT_LEFT_J: rdai->sys_delay = 1; rdai->data_alignment = 0; break; case SND_SOC_DAIFMT_RIGHT_J: rdai->sys_delay = 1; rdai->data_alignment = 1; break; } return 0; } static const struct snd_soc_dai_ops rsnd_soc_dai_ops = { .trigger = rsnd_soc_dai_trigger, .set_fmt = rsnd_soc_dai_set_fmt, }; static int rsnd_dai_probe(struct platform_device *pdev, struct rcar_snd_info *info, struct rsnd_priv *priv) { struct snd_soc_dai_driver *drv; struct rsnd_dai *rdai; struct rsnd_mod *pmod, *cmod; struct device *dev = rsnd_priv_to_dev(priv); int dai_nr; int i; /* get max dai nr */ for (dai_nr = 0; dai_nr < 32; dai_nr++) { pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1); cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0); if (!pmod && !cmod) break; } if (!dai_nr) { dev_err(dev, "no dai\n"); return -EIO; } drv = devm_kzalloc(dev, sizeof(*drv) * dai_nr, GFP_KERNEL); rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL); if (!drv || !rdai) { dev_err(dev, "dai allocate failed\n"); return -ENOMEM; } for (i = 0; i < dai_nr; i++) { pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1); cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0); /* * init rsnd_dai */ INIT_LIST_HEAD(&rdai[i].playback.head); INIT_LIST_HEAD(&rdai[i].capture.head); snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i); /* * init snd_soc_dai_driver */ drv[i].name = rdai[i].name; drv[i].ops = &rsnd_soc_dai_ops; if (pmod) { drv[i].playback.rates = RSND_RATES; drv[i].playback.formats = RSND_FMTS; drv[i].playback.channels_min = 2; drv[i].playback.channels_max = 2; } if (cmod) { drv[i].capture.rates = RSND_RATES; drv[i].capture.formats = RSND_FMTS; drv[i].capture.channels_min = 2; drv[i].capture.channels_max = 2; } dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name, pmod ? "play" : " -- ", cmod ? "capture" : " -- "); } priv->dai_nr = dai_nr; priv->daidrv = drv; priv->rdai = rdai; return 0; } static void rsnd_dai_remove(struct platform_device *pdev, struct rsnd_priv *priv) { } /* * pcm ops */ static struct snd_pcm_hardware rsnd_pcm_hardware = { .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE, .formats = RSND_FMTS, .rates = RSND_RATES, .rate_min = 8000, .rate_max = 192000, .channels_min = 2, .channels_max = 2, .buffer_bytes_max = 64 * 1024, .period_bytes_min = 32, .period_bytes_max = 8192, .periods_min = 1, .periods_max = 32, .fifo_size = 256, }; static int rsnd_pcm_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; int ret = 0; snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware); ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); return ret; } static int rsnd_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); } static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_dai *dai = rsnd_substream_to_dai(substream); struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); return bytes_to_frames(runtime, io->byte_pos); } static struct snd_pcm_ops rsnd_pcm_ops = { .open = rsnd_pcm_open, .ioctl = snd_pcm_lib_ioctl, .hw_params = rsnd_hw_params, .hw_free = snd_pcm_lib_free_pages, .pointer = rsnd_pointer, }; /* * snd_soc_platform */ #define PREALLOC_BUFFER (32 * 1024) #define PREALLOC_BUFFER_MAX (32 * 1024) static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd) { return snd_pcm_lib_preallocate_pages_for_all( rtd->pcm, SNDRV_DMA_TYPE_DEV, rtd->card->snd_card->dev, PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); } static void rsnd_pcm_free(struct snd_pcm *pcm) { snd_pcm_lib_preallocate_free_for_all(pcm); } static struct snd_soc_platform_driver rsnd_soc_platform = { .ops = &rsnd_pcm_ops, .pcm_new = rsnd_pcm_new, .pcm_free = rsnd_pcm_free, }; static const struct snd_soc_component_driver rsnd_soc_component = { .name = "rsnd", }; /* * rsnd probe */ static int rsnd_probe(struct platform_device *pdev) { struct rcar_snd_info *info; struct rsnd_priv *priv; struct device *dev = &pdev->dev; int ret; info = pdev->dev.platform_data; if (!info) { dev_err(dev, "driver needs R-Car sound information\n"); return -ENODEV; } /* * init priv data */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) { dev_err(dev, "priv allocate failed\n"); return -ENODEV; } priv->dev = dev; priv->info = info; spin_lock_init(&priv->lock); /* * init each module */ ret = rsnd_gen_probe(pdev, info, priv); if (ret < 0) return ret; ret = rsnd_scu_probe(pdev, info, priv); if (ret < 0) return ret; ret = rsnd_adg_probe(pdev, info, priv); if (ret < 0) return ret; ret = rsnd_ssi_probe(pdev, info, priv); if (ret < 0) return ret; ret = rsnd_dai_probe(pdev, info, priv); if (ret < 0) return ret; /* * asoc register */ ret = snd_soc_register_platform(dev, &rsnd_soc_platform); if (ret < 0) { dev_err(dev, "cannot snd soc register\n"); return ret; } ret = snd_soc_register_component(dev, &rsnd_soc_component, priv->daidrv, rsnd_dai_nr(priv)); if (ret < 0) { dev_err(dev, "cannot snd dai register\n"); goto exit_snd_soc; } dev_set_drvdata(dev, priv); pm_runtime_enable(dev); dev_info(dev, "probed\n"); return ret; exit_snd_soc: snd_soc_unregister_platform(dev); return ret; } static int rsnd_remove(struct platform_device *pdev) { struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev); pm_runtime_disable(&pdev->dev); /* * remove each module */ rsnd_ssi_remove(pdev, priv); rsnd_adg_remove(pdev, priv); rsnd_scu_remove(pdev, priv); rsnd_dai_remove(pdev, priv); rsnd_gen_remove(pdev, priv); return 0; } static struct platform_driver rsnd_driver = { .driver = { .name = "rcar_sound", }, .probe = rsnd_probe, .remove = rsnd_remove, }; module_platform_driver(rsnd_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Renesas R-Car audio driver"); MODULE_AUTHOR("Kuninori Morimoto "); MODULE_ALIAS("platform:rcar-pcm-audio");