/*
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* dw-hdmi-i2s-audio.c
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*
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* Copyright (c) 2017 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <drm/bridge/dw_hdmi.h>
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#include <sound/hdmi-codec.h>
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#include "dw-hdmi.h"
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#include "dw-hdmi-audio.h"
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#define DRIVER_NAME "dw-hdmi-i2s-audio"
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static inline void hdmi_write(struct dw_hdmi_i2s_audio_data *audio,
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u8 val, int offset)
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{
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struct dw_hdmi *hdmi = audio->hdmi;
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audio->write(hdmi, val, offset);
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}
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static inline u8 hdmi_read(struct dw_hdmi_i2s_audio_data *audio, int offset)
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{
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struct dw_hdmi *hdmi = audio->hdmi;
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return audio->read(hdmi, offset);
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}
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static inline void hdmi_update_bits(struct dw_hdmi_i2s_audio_data *audio,
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u8 data, u8 mask, unsigned int reg)
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{
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struct dw_hdmi *hdmi = audio->hdmi;
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audio->mod(hdmi, data, mask, reg);
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}
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static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
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struct hdmi_codec_daifmt *fmt,
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struct hdmi_codec_params *hparms)
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{
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struct dw_hdmi_i2s_audio_data *audio = data;
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struct dw_hdmi *hdmi = audio->hdmi;
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u8 conf0 = 0;
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u8 conf1 = 0;
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u8 inputclkfs = 0;
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u8 val;
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dw_hdmi_audio_disable(hdmi);
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/* it cares I2S only */
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if ((fmt->fmt != HDMI_I2S) ||
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(fmt->bit_clk_master | fmt->frame_clk_master)) {
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dev_err(dev, "unsupported format/settings\n");
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return -EINVAL;
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}
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inputclkfs = HDMI_AUD_INPUTCLKFS_128FS;
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switch (hparms->sample_width) {
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case 16:
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conf1 = HDMI_AUD_CONF1_WIDTH_16;
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break;
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case 24:
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case 32:
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conf1 = HDMI_AUD_CONF1_WIDTH_24;
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break;
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default:
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dev_err(dev, "unsupported sample width [%d]\n", hparms->sample_width);
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return -EINVAL;
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}
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switch (hparms->channels) {
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case 2:
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conf0 = HDMI_AUD_CONF0_I2S_2CHANNEL_ENABLE;
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break;
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case 4:
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conf0 = HDMI_AUD_CONF0_I2S_4CHANNEL_ENABLE;
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break;
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case 6:
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conf0 = HDMI_AUD_CONF0_I2S_6CHANNEL_ENABLE;
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break;
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case 8:
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conf0 = HDMI_AUD_CONF0_I2S_8CHANNEL_ENABLE;
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break;
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default:
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dev_err(dev, "unsupported channels [%d]\n", hparms->channels);
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return -EINVAL;
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}
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/*
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* dw-hdmi introduced insert_pcuv bit in version 2.10a.
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* When set (1'b1), this bit enables the insertion of the PCUV
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* (Parity, Channel Status, User bit and Validity) bits on the
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* incoming audio stream (support limited to Linear PCM audio)
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*/
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val = 0;
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if (hdmi_read(audio, HDMI_DESIGN_ID) >= 0x21)
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val = HDMI_AUD_CONF2_INSERT_PCUV;
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/*Mask fifo empty and full int and reset fifo*/
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hdmi_update_bits(audio,
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HDMI_AUD_INT_FIFO_EMPTY_MSK |
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HDMI_AUD_INT_FIFO_FULL_MSK,
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HDMI_AUD_INT_FIFO_EMPTY_MSK |
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HDMI_AUD_INT_FIFO_FULL_MSK, HDMI_AUD_INT);
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hdmi_update_bits(audio, HDMI_AUD_CONF0_SW_RESET,
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HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
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hdmi_update_bits(audio, HDMI_MC_SWRSTZ_I2S_RESET_MSK,
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HDMI_MC_SWRSTZ_I2S_RESET_MSK, HDMI_MC_SWRSTZ);
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switch (hparms->mode) {
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case NLPCM:
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hdmi_write(audio, HDMI_AUD_CONF2_NLPCM, HDMI_AUD_CONF2);
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conf1 = HDMI_AUD_CONF1_WIDTH_21;
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break;
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case HBR:
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hdmi_write(audio, HDMI_AUD_CONF2_HBR, HDMI_AUD_CONF2);
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conf1 = HDMI_AUD_CONF1_WIDTH_21;
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break;
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default:
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hdmi_write(audio, val, HDMI_AUD_CONF2);
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break;
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}
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dw_hdmi_set_sample_rate(hdmi, hparms->sample_rate);
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hdmi_write(audio, inputclkfs, HDMI_AUD_INPUTCLKFS);
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hdmi_write(audio, conf0, HDMI_AUD_CONF0);
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hdmi_write(audio, conf1, HDMI_AUD_CONF1);
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val = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT0;
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if (hparms->channels > 2)
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val = HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_LAYOUT1;
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hdmi_update_bits(audio, val, HDMI_FC_AUDSCONF_AUD_PACKET_LAYOUT_MASK,
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HDMI_FC_AUDSCONF);
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switch (hparms->sample_rate) {
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case 32000:
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val = HDMI_FC_AUDSCHNLS_32K;
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break;
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case 44100:
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val = HDMI_FC_AUDSCHNLS_441K;
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break;
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case 48000:
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val = HDMI_FC_AUDSCHNLS_48K;
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break;
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case 88200:
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val = HDMI_FC_AUDSCHNLS_882K;
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break;
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case 96000:
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val = HDMI_FC_AUDSCHNLS_96K;
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break;
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case 176400:
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val = HDMI_FC_AUDSCHNLS_1764K;
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break;
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case 192000:
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val = HDMI_FC_AUDSCHNLS_192K;
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break;
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default:
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val = HDMI_FC_AUDSCHNLS_441K;
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break;
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}
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/* set channel status register */
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hdmi_update_bits(audio, val,
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HDMI_FC_AUDSCHNLS7_SAMPFREQ_MASK,
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HDMI_FC_AUDSCHNLS7);
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hdmi_write(audio,
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(((u8)~val) << HDMI_FC_AUDSCHNLS8_ORIGSAMPFREQ_OFFSET),
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HDMI_FC_AUDSCHNLS8);
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/* Refer to CEA861-E Audio infoFrame
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* Set both Audio Channel Count and Audio Coding
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* Type Refer to Stream Head for HDMI
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*/
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hdmi_update_bits(audio,
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(hparms->channels - 1) << HDMI_FC_AUDICONF0_CC_OFFSET,
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HDMI_FC_AUDICONF0_CC_MASK, HDMI_FC_AUDICONF0);
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/* Set both Audio Sample Size and Sample Frequency
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* Refer to Stream Head for HDMI
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*/
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hdmi_write(audio, 0x00, HDMI_FC_AUDICONF1);
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/* Set Channel Allocation */
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hdmi_write(audio, 0x00, HDMI_FC_AUDICONF2);
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/* Set LFEPBLDOWN-MIX INH and LSV */
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hdmi_write(audio, 0x00, HDMI_FC_AUDICONF3);
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dw_hdmi_audio_enable(hdmi);
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hdmi_update_bits(audio, HDMI_AUD_CONF0_SW_RESET,
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HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
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hdmi_update_bits(audio, HDMI_MC_SWRSTZ_I2S_RESET_MSK,
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HDMI_MC_SWRSTZ_I2S_RESET_MSK, HDMI_MC_SWRSTZ);
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return 0;
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}
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static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
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struct device_node *endpoint)
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{
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struct of_endpoint of_ep;
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int ret;
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ret = of_graph_parse_endpoint(endpoint, &of_ep);
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if (ret < 0)
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return ret;
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/*
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* HDMI sound should be located as reg = <2>
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* Then, it is sound port 0
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*/
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if (of_ep.port == 2)
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return 0;
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return -EINVAL;
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}
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static int dw_hdmi_i2s_hook_plugged_cb(struct device *dev, void *data,
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hdmi_codec_plugged_cb fn,
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struct device *codec_dev)
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{
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struct dw_hdmi_i2s_audio_data *audio = data;
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struct dw_hdmi *hdmi = audio->hdmi;
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return dw_hdmi_set_plugged_cb(hdmi, fn, codec_dev);
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}
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static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
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.hw_params = dw_hdmi_i2s_hw_params,
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.get_dai_id = dw_hdmi_i2s_get_dai_id,
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.hook_plugged_cb = dw_hdmi_i2s_hook_plugged_cb,
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};
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static int snd_dw_hdmi_probe(struct platform_device *pdev)
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{
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struct dw_hdmi_i2s_audio_data *audio = pdev->dev.platform_data;
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struct platform_device_info pdevinfo;
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struct hdmi_codec_pdata pdata;
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struct platform_device *platform;
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pdata.ops = &dw_hdmi_i2s_ops;
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pdata.i2s = 1;
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pdata.max_i2s_channels = 8;
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pdata.data = audio;
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memset(&pdevinfo, 0, sizeof(pdevinfo));
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pdevinfo.parent = pdev->dev.parent;
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pdevinfo.id = PLATFORM_DEVID_AUTO;
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pdevinfo.name = HDMI_CODEC_DRV_NAME;
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pdevinfo.data = &pdata;
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pdevinfo.size_data = sizeof(pdata);
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pdevinfo.dma_mask = DMA_BIT_MASK(32);
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platform = platform_device_register_full(&pdevinfo);
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if (IS_ERR(platform))
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return PTR_ERR(platform);
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dev_set_drvdata(&pdev->dev, platform);
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return 0;
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}
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static int snd_dw_hdmi_remove(struct platform_device *pdev)
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{
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struct platform_device *platform = dev_get_drvdata(&pdev->dev);
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platform_device_unregister(platform);
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return 0;
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}
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static struct platform_driver snd_dw_hdmi_driver = {
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.probe = snd_dw_hdmi_probe,
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.remove = snd_dw_hdmi_remove,
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.driver = {
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.name = DRIVER_NAME,
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},
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};
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module_platform_driver(snd_dw_hdmi_driver);
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MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
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MODULE_DESCRIPTION("Synopsis Designware HDMI I2S ALSA SoC interface");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:" DRIVER_NAME);
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