| /* |
| * Renesas R-Car SRU/SCU/SSIU/SSI support |
| * |
| * Copyright (C) 2013 Renesas Solutions Corp. |
| * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| * |
| * Based on fsi.c |
| * Kuninori Morimoto <morimoto.kuninori@renesas.com> |
| * |
| * 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 <linux/pm_runtime.h> |
| #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) ? -ENODEV : \ |
| 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_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; |
| } |
| |
| struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id) |
| { |
| 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_dai_platform_info *info = rsnd_dai_get_platform_info(rdai); |
| int ssi_id = rsnd_dai_is_play(rdai, io) ? info->ssi_id_playback : |
| info->ssi_id_capture; |
| 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_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_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 device *dev = rsnd_priv_to_dev(priv); |
| struct rsnd_dai_platform_info *dai_info; |
| int dai_nr = info->dai_info_nr; |
| int i, pid, cid; |
| |
| 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++) { |
| dai_info = &info->dai_info[i]; |
| |
| pid = dai_info->ssi_id_playback; |
| cid = dai_info->ssi_id_capture; |
| |
| /* |
| * init rsnd_dai |
| */ |
| INIT_LIST_HEAD(&rdai[i].playback.head); |
| INIT_LIST_HEAD(&rdai[i].capture.head); |
| |
| rdai[i].info = dai_info; |
| |
| 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 (pid >= 0) { |
| 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 (cid >= 0) { |
| 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 (%d, %d) probed", rdai[i].name, pid, cid); |
| } |
| |
| 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_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_dai_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 <kuninori.morimoto.gx@renesas.com>"); |
| MODULE_ALIAS("platform:rcar-pcm-audio"); |