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584 lines
15 KiB
584 lines
15 KiB
/*
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* tegra30_i2s.c - Tegra30 I2S driver
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*
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* Author: Stephen Warren <swarren@nvidia.com>
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* Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
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*
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* Based on code copyright/by:
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*
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* Copyright (c) 2009-2010, NVIDIA Corporation.
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* Scott Peterson <speterson@nvidia.com>
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*
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* Copyright (C) 2010 Google, Inc.
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* Iliyan Malchev <malchev@google.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/slab.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 <sound/soc.h>
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#include <sound/dmaengine_pcm.h>
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#include "tegra30_ahub.h"
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#include "tegra30_i2s.h"
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#define DRV_NAME "tegra30-i2s"
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static int tegra30_i2s_runtime_suspend(struct device *dev)
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{
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struct tegra30_i2s *i2s = dev_get_drvdata(dev);
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regcache_cache_only(i2s->regmap, true);
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clk_disable_unprepare(i2s->clk_i2s);
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return 0;
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}
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static int tegra30_i2s_runtime_resume(struct device *dev)
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{
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struct tegra30_i2s *i2s = dev_get_drvdata(dev);
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int ret;
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ret = clk_prepare_enable(i2s->clk_i2s);
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if (ret) {
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dev_err(dev, "clk_enable failed: %d\n", ret);
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return ret;
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}
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regcache_cache_only(i2s->regmap, false);
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return 0;
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}
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static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
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unsigned int fmt)
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{
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struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
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unsigned int mask = 0, val = 0;
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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default:
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return -EINVAL;
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}
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mask |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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val |= TEGRA30_I2S_CTRL_MASTER_ENABLE;
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break;
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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default:
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return -EINVAL;
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}
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mask |= TEGRA30_I2S_CTRL_FRAME_FORMAT_MASK |
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TEGRA30_I2S_CTRL_LRCK_MASK;
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_DSP_A:
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val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
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val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_FSYNC;
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val |= TEGRA30_I2S_CTRL_LRCK_R_LOW;
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break;
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case SND_SOC_DAIFMT_I2S:
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val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
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val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
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val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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val |= TEGRA30_I2S_CTRL_FRAME_FORMAT_LRCK;
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val |= TEGRA30_I2S_CTRL_LRCK_L_LOW;
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break;
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default:
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return -EINVAL;
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}
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pm_runtime_get_sync(dai->dev);
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regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
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pm_runtime_put(dai->dev);
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return 0;
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}
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static int tegra30_i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct device *dev = dai->dev;
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struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
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unsigned int mask, val, reg;
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int ret, sample_size, srate, i2sclock, bitcnt;
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struct tegra30_ahub_cif_conf cif_conf;
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if (params_channels(params) != 2)
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return -EINVAL;
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mask = TEGRA30_I2S_CTRL_BIT_SIZE_MASK;
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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val = TEGRA30_I2S_CTRL_BIT_SIZE_16;
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sample_size = 16;
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break;
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default:
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return -EINVAL;
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}
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regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL, mask, val);
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srate = params_rate(params);
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/* Final "* 2" required by Tegra hardware */
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i2sclock = srate * params_channels(params) * sample_size * 2;
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bitcnt = (i2sclock / (2 * srate)) - 1;
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if (bitcnt < 0 || bitcnt > TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_MASK_US)
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return -EINVAL;
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ret = clk_set_rate(i2s->clk_i2s, i2sclock);
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if (ret) {
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dev_err(dev, "Can't set I2S clock rate: %d\n", ret);
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return ret;
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}
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val = bitcnt << TEGRA30_I2S_TIMING_CHANNEL_BIT_COUNT_SHIFT;
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if (i2sclock % (2 * srate))
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val |= TEGRA30_I2S_TIMING_NON_SYM_ENABLE;
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regmap_write(i2s->regmap, TEGRA30_I2S_TIMING, val);
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cif_conf.threshold = 0;
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cif_conf.audio_channels = 2;
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cif_conf.client_channels = 2;
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cif_conf.audio_bits = TEGRA30_AUDIOCIF_BITS_16;
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cif_conf.client_bits = TEGRA30_AUDIOCIF_BITS_16;
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cif_conf.expand = 0;
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cif_conf.stereo_conv = 0;
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cif_conf.replicate = 0;
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cif_conf.truncate = 0;
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cif_conf.mono_conv = 0;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_RX;
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reg = TEGRA30_I2S_CIF_RX_CTRL;
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} else {
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cif_conf.direction = TEGRA30_AUDIOCIF_DIRECTION_TX;
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reg = TEGRA30_I2S_CIF_TX_CTRL;
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}
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i2s->soc_data->set_audio_cif(i2s->regmap, reg, &cif_conf);
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val = (1 << TEGRA30_I2S_OFFSET_RX_DATA_OFFSET_SHIFT) |
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(1 << TEGRA30_I2S_OFFSET_TX_DATA_OFFSET_SHIFT);
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regmap_write(i2s->regmap, TEGRA30_I2S_OFFSET, val);
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return 0;
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}
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static void tegra30_i2s_start_playback(struct tegra30_i2s *i2s)
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{
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tegra30_ahub_enable_tx_fifo(i2s->playback_fifo_cif);
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regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
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TEGRA30_I2S_CTRL_XFER_EN_TX,
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TEGRA30_I2S_CTRL_XFER_EN_TX);
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}
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static void tegra30_i2s_stop_playback(struct tegra30_i2s *i2s)
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{
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tegra30_ahub_disable_tx_fifo(i2s->playback_fifo_cif);
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regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
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TEGRA30_I2S_CTRL_XFER_EN_TX, 0);
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}
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static void tegra30_i2s_start_capture(struct tegra30_i2s *i2s)
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{
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tegra30_ahub_enable_rx_fifo(i2s->capture_fifo_cif);
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regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
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TEGRA30_I2S_CTRL_XFER_EN_RX,
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TEGRA30_I2S_CTRL_XFER_EN_RX);
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}
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static void tegra30_i2s_stop_capture(struct tegra30_i2s *i2s)
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{
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tegra30_ahub_disable_rx_fifo(i2s->capture_fifo_cif);
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regmap_update_bits(i2s->regmap, TEGRA30_I2S_CTRL,
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TEGRA30_I2S_CTRL_XFER_EN_RX, 0);
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}
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static int tegra30_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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case SNDRV_PCM_TRIGGER_RESUME:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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tegra30_i2s_start_playback(i2s);
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else
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tegra30_i2s_start_capture(i2s);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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tegra30_i2s_stop_playback(i2s);
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else
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tegra30_i2s_stop_capture(i2s);
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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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static int tegra30_i2s_probe(struct snd_soc_dai *dai)
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{
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struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(dai);
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dai->capture_dma_data = &i2s->capture_dma_data;
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dai->playback_dma_data = &i2s->playback_dma_data;
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return 0;
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}
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static const struct snd_soc_dai_ops tegra30_i2s_dai_ops = {
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.set_fmt = tegra30_i2s_set_fmt,
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.hw_params = tegra30_i2s_hw_params,
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.trigger = tegra30_i2s_trigger,
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};
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static const struct snd_soc_dai_driver tegra30_i2s_dai_template = {
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.probe = tegra30_i2s_probe,
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_96000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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.capture = {
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.stream_name = "Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_96000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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.ops = &tegra30_i2s_dai_ops,
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.symmetric_rates = 1,
|
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};
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|
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static const struct snd_soc_component_driver tegra30_i2s_component = {
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.name = DRV_NAME,
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};
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|
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static bool tegra30_i2s_wr_rd_reg(struct device *dev, unsigned int reg)
|
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{
|
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switch (reg) {
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case TEGRA30_I2S_CTRL:
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case TEGRA30_I2S_TIMING:
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case TEGRA30_I2S_OFFSET:
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case TEGRA30_I2S_CH_CTRL:
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case TEGRA30_I2S_SLOT_CTRL:
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case TEGRA30_I2S_CIF_RX_CTRL:
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case TEGRA30_I2S_CIF_TX_CTRL:
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case TEGRA30_I2S_FLOWCTL:
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case TEGRA30_I2S_TX_STEP:
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case TEGRA30_I2S_FLOW_STATUS:
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case TEGRA30_I2S_FLOW_TOTAL:
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case TEGRA30_I2S_FLOW_OVER:
|
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case TEGRA30_I2S_FLOW_UNDER:
|
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case TEGRA30_I2S_LCOEF_1_4_0:
|
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case TEGRA30_I2S_LCOEF_1_4_1:
|
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case TEGRA30_I2S_LCOEF_1_4_2:
|
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case TEGRA30_I2S_LCOEF_1_4_3:
|
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case TEGRA30_I2S_LCOEF_1_4_4:
|
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case TEGRA30_I2S_LCOEF_1_4_5:
|
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case TEGRA30_I2S_LCOEF_2_4_0:
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case TEGRA30_I2S_LCOEF_2_4_1:
|
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case TEGRA30_I2S_LCOEF_2_4_2:
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return true;
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default:
|
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return false;
|
|
}
|
|
}
|
|
|
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static bool tegra30_i2s_volatile_reg(struct device *dev, unsigned int reg)
|
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{
|
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switch (reg) {
|
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case TEGRA30_I2S_FLOW_STATUS:
|
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case TEGRA30_I2S_FLOW_TOTAL:
|
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case TEGRA30_I2S_FLOW_OVER:
|
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case TEGRA30_I2S_FLOW_UNDER:
|
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return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config tegra30_i2s_regmap_config = {
|
|
.reg_bits = 32,
|
|
.reg_stride = 4,
|
|
.val_bits = 32,
|
|
.max_register = TEGRA30_I2S_LCOEF_2_4_2,
|
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.writeable_reg = tegra30_i2s_wr_rd_reg,
|
|
.readable_reg = tegra30_i2s_wr_rd_reg,
|
|
.volatile_reg = tegra30_i2s_volatile_reg,
|
|
.cache_type = REGCACHE_FLAT,
|
|
};
|
|
|
|
static const struct tegra30_i2s_soc_data tegra30_i2s_config = {
|
|
.set_audio_cif = tegra30_ahub_set_cif,
|
|
};
|
|
|
|
static const struct tegra30_i2s_soc_data tegra124_i2s_config = {
|
|
.set_audio_cif = tegra124_ahub_set_cif,
|
|
};
|
|
|
|
static const struct of_device_id tegra30_i2s_of_match[] = {
|
|
{ .compatible = "nvidia,tegra124-i2s", .data = &tegra124_i2s_config },
|
|
{ .compatible = "nvidia,tegra30-i2s", .data = &tegra30_i2s_config },
|
|
{},
|
|
};
|
|
|
|
static int tegra30_i2s_platform_probe(struct platform_device *pdev)
|
|
{
|
|
struct tegra30_i2s *i2s;
|
|
const struct of_device_id *match;
|
|
u32 cif_ids[2];
|
|
struct resource *mem;
|
|
void __iomem *regs;
|
|
int ret;
|
|
|
|
i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra30_i2s), GFP_KERNEL);
|
|
if (!i2s) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
dev_set_drvdata(&pdev->dev, i2s);
|
|
|
|
match = of_match_device(tegra30_i2s_of_match, &pdev->dev);
|
|
if (!match) {
|
|
dev_err(&pdev->dev, "Error: No device match found\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
i2s->soc_data = (struct tegra30_i2s_soc_data *)match->data;
|
|
|
|
i2s->dai = tegra30_i2s_dai_template;
|
|
i2s->dai.name = dev_name(&pdev->dev);
|
|
|
|
ret = of_property_read_u32_array(pdev->dev.of_node,
|
|
"nvidia,ahub-cif-ids", cif_ids,
|
|
ARRAY_SIZE(cif_ids));
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
i2s->playback_i2s_cif = cif_ids[0];
|
|
i2s->capture_i2s_cif = cif_ids[1];
|
|
|
|
i2s->clk_i2s = clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(i2s->clk_i2s)) {
|
|
dev_err(&pdev->dev, "Can't retrieve i2s clock\n");
|
|
ret = PTR_ERR(i2s->clk_i2s);
|
|
goto err;
|
|
}
|
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
regs = devm_ioremap_resource(&pdev->dev, mem);
|
|
if (IS_ERR(regs)) {
|
|
ret = PTR_ERR(regs);
|
|
goto err_clk_put;
|
|
}
|
|
|
|
i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
|
|
&tegra30_i2s_regmap_config);
|
|
if (IS_ERR(i2s->regmap)) {
|
|
dev_err(&pdev->dev, "regmap init failed\n");
|
|
ret = PTR_ERR(i2s->regmap);
|
|
goto err_clk_put;
|
|
}
|
|
regcache_cache_only(i2s->regmap, true);
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
if (!pm_runtime_enabled(&pdev->dev)) {
|
|
ret = tegra30_i2s_runtime_resume(&pdev->dev);
|
|
if (ret)
|
|
goto err_pm_disable;
|
|
}
|
|
|
|
i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
i2s->playback_dma_data.maxburst = 4;
|
|
ret = tegra30_ahub_allocate_tx_fifo(&i2s->playback_fifo_cif,
|
|
i2s->playback_dma_chan,
|
|
sizeof(i2s->playback_dma_chan),
|
|
&i2s->playback_dma_data.addr);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Could not alloc TX FIFO: %d\n", ret);
|
|
goto err_suspend;
|
|
}
|
|
ret = tegra30_ahub_set_rx_cif_source(i2s->playback_i2s_cif,
|
|
i2s->playback_fifo_cif);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Could not route TX FIFO: %d\n", ret);
|
|
goto err_free_tx_fifo;
|
|
}
|
|
|
|
i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
i2s->capture_dma_data.maxburst = 4;
|
|
ret = tegra30_ahub_allocate_rx_fifo(&i2s->capture_fifo_cif,
|
|
i2s->capture_dma_chan,
|
|
sizeof(i2s->capture_dma_chan),
|
|
&i2s->capture_dma_data.addr);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Could not alloc RX FIFO: %d\n", ret);
|
|
goto err_unroute_tx_fifo;
|
|
}
|
|
ret = tegra30_ahub_set_rx_cif_source(i2s->capture_fifo_cif,
|
|
i2s->capture_i2s_cif);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Could not route TX FIFO: %d\n", ret);
|
|
goto err_free_rx_fifo;
|
|
}
|
|
|
|
ret = snd_soc_register_component(&pdev->dev, &tegra30_i2s_component,
|
|
&i2s->dai, 1);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
|
|
ret = -ENOMEM;
|
|
goto err_unroute_rx_fifo;
|
|
}
|
|
|
|
ret = tegra_pcm_platform_register_with_chan_names(&pdev->dev,
|
|
&i2s->dma_config, i2s->playback_dma_chan,
|
|
i2s->capture_dma_chan);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Could not register PCM: %d\n", ret);
|
|
goto err_unregister_component;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_unregister_component:
|
|
snd_soc_unregister_component(&pdev->dev);
|
|
err_unroute_rx_fifo:
|
|
tegra30_ahub_unset_rx_cif_source(i2s->capture_fifo_cif);
|
|
err_free_rx_fifo:
|
|
tegra30_ahub_free_rx_fifo(i2s->capture_fifo_cif);
|
|
err_unroute_tx_fifo:
|
|
tegra30_ahub_unset_rx_cif_source(i2s->playback_i2s_cif);
|
|
err_free_tx_fifo:
|
|
tegra30_ahub_free_tx_fifo(i2s->playback_fifo_cif);
|
|
err_suspend:
|
|
if (!pm_runtime_status_suspended(&pdev->dev))
|
|
tegra30_i2s_runtime_suspend(&pdev->dev);
|
|
err_pm_disable:
|
|
pm_runtime_disable(&pdev->dev);
|
|
err_clk_put:
|
|
clk_put(i2s->clk_i2s);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int tegra30_i2s_platform_remove(struct platform_device *pdev)
|
|
{
|
|
struct tegra30_i2s *i2s = dev_get_drvdata(&pdev->dev);
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
if (!pm_runtime_status_suspended(&pdev->dev))
|
|
tegra30_i2s_runtime_suspend(&pdev->dev);
|
|
|
|
tegra_pcm_platform_unregister(&pdev->dev);
|
|
snd_soc_unregister_component(&pdev->dev);
|
|
|
|
tegra30_ahub_unset_rx_cif_source(i2s->capture_fifo_cif);
|
|
tegra30_ahub_free_rx_fifo(i2s->capture_fifo_cif);
|
|
|
|
tegra30_ahub_unset_rx_cif_source(i2s->playback_i2s_cif);
|
|
tegra30_ahub_free_tx_fifo(i2s->playback_fifo_cif);
|
|
|
|
clk_put(i2s->clk_i2s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int tegra30_i2s_suspend(struct device *dev)
|
|
{
|
|
struct tegra30_i2s *i2s = dev_get_drvdata(dev);
|
|
|
|
regcache_mark_dirty(i2s->regmap);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra30_i2s_resume(struct device *dev)
|
|
{
|
|
struct tegra30_i2s *i2s = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = pm_runtime_get_sync(dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = regcache_sync(i2s->regmap);
|
|
pm_runtime_put(dev);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops tegra30_i2s_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend,
|
|
tegra30_i2s_runtime_resume, NULL)
|
|
SET_SYSTEM_SLEEP_PM_OPS(tegra30_i2s_suspend, tegra30_i2s_resume)
|
|
};
|
|
|
|
static struct platform_driver tegra30_i2s_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.of_match_table = tegra30_i2s_of_match,
|
|
.pm = &tegra30_i2s_pm_ops,
|
|
},
|
|
.probe = tegra30_i2s_platform_probe,
|
|
.remove = tegra30_i2s_platform_remove,
|
|
};
|
|
module_platform_driver(tegra30_i2s_driver);
|
|
|
|
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
|
|
MODULE_DESCRIPTION("Tegra30 I2S ASoC driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|
|
MODULE_DEVICE_TABLE(of, tegra30_i2s_of_match);
|
|
|