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ce780a47c3
Change mutex and spinlock management to avoid sleep in atomic issue. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> Link: https://lore.kernel.org/r/20200113100400.30472-1-arnaud.pouliquen@st.com Signed-off-by: Mark Brown <broonie@kernel.org>
1148 lines
31 KiB
C
1148 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) STMicroelectronics SA 2015
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* Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
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* for STMicroelectronics.
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*/
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#include <linux/clk.h>
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#include <linux/mfd/syscon.h>
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#include <sound/asoundef.h>
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#include <sound/soc.h>
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#include "uniperif.h"
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/*
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* Some hardware-related definitions
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*/
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/* sys config registers definitions */
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#define SYS_CFG_AUDIO_GLUE 0xA4
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/*
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* Driver specific types.
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*/
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#define UNIPERIF_PLAYER_CLK_ADJ_MIN -999999
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#define UNIPERIF_PLAYER_CLK_ADJ_MAX 1000000
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#define UNIPERIF_PLAYER_I2S_OUT 1 /* player id connected to I2S/TDM TX bus */
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/*
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* Note: snd_pcm_hardware is linked to DMA controller but is declared here to
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* integrate DAI_CPU capability in term of rate and supported channels
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*/
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static const struct snd_pcm_hardware uni_player_pcm_hw = {
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.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID,
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.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE,
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.rates = SNDRV_PCM_RATE_CONTINUOUS,
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.rate_min = 8000,
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.rate_max = 192000,
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.channels_min = 2,
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.channels_max = 8,
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.periods_min = 2,
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.periods_max = 48,
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.period_bytes_min = 128,
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.period_bytes_max = 64 * PAGE_SIZE,
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.buffer_bytes_max = 256 * PAGE_SIZE
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};
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/*
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* uni_player_irq_handler
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* In case of error audio stream is stopped; stop action is protected via PCM
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* stream lock to avoid race condition with trigger callback.
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*/
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static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
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{
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irqreturn_t ret = IRQ_NONE;
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struct uniperif *player = dev_id;
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unsigned int status;
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unsigned int tmp;
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spin_lock(&player->irq_lock);
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if (!player->substream)
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goto irq_spin_unlock;
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snd_pcm_stream_lock(player->substream);
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if (player->state == UNIPERIF_STATE_STOPPED)
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goto stream_unlock;
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/* Get interrupt status & clear them immediately */
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status = GET_UNIPERIF_ITS(player);
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SET_UNIPERIF_ITS_BCLR(player, status);
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/* Check for fifo error (underrun) */
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if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(player))) {
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dev_err(player->dev, "FIFO underflow error detected\n");
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/* Interrupt is just for information when underflow recovery */
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if (player->underflow_enabled) {
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/* Update state to underflow */
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player->state = UNIPERIF_STATE_UNDERFLOW;
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} else {
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/* Disable interrupt so doesn't continually fire */
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SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player);
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/* Stop the player */
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snd_pcm_stop_xrun(player->substream);
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}
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ret = IRQ_HANDLED;
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}
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/* Check for dma error (overrun) */
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if (unlikely(status & UNIPERIF_ITS_DMA_ERROR_MASK(player))) {
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dev_err(player->dev, "DMA error detected\n");
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/* Disable interrupt so doesn't continually fire */
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SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player);
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/* Stop the player */
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snd_pcm_stop_xrun(player->substream);
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ret = IRQ_HANDLED;
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}
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/* Check for underflow recovery done */
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if (unlikely(status & UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player))) {
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if (!player->underflow_enabled) {
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dev_err(player->dev,
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"unexpected Underflow recovering\n");
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ret = -EPERM;
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goto stream_unlock;
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}
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/* Read the underflow recovery duration */
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tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player);
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dev_dbg(player->dev, "Underflow recovered (%d LR clocks max)\n",
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tmp);
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/* Clear the underflow recovery duration */
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SET_UNIPERIF_BIT_CONTROL_CLR_UNDERFLOW_DURATION(player);
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/* Update state to started */
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player->state = UNIPERIF_STATE_STARTED;
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ret = IRQ_HANDLED;
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}
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/* Check if underflow recovery failed */
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if (unlikely(status &
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UNIPERIF_ITM_UNDERFLOW_REC_FAILED_MASK(player))) {
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dev_err(player->dev, "Underflow recovery failed\n");
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/* Stop the player */
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snd_pcm_stop_xrun(player->substream);
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ret = IRQ_HANDLED;
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}
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stream_unlock:
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snd_pcm_stream_unlock(player->substream);
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irq_spin_unlock:
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spin_unlock(&player->irq_lock);
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return ret;
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}
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static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
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{
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int rate_adjusted, rate_achieved, delta, ret;
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int adjustment = player->clk_adj;
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/*
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* a
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* F = f + --------- * f = f + d
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* 1000000
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*
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* a
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* d = --------- * f
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* 1000000
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*
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* where:
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* f - nominal rate
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* a - adjustment in ppm (parts per milion)
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* F - rate to be set in synthesizer
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* d - delta (difference) between f and F
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*/
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if (adjustment < 0) {
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/* div64_64 operates on unsigned values... */
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delta = -1;
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adjustment = -adjustment;
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} else {
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delta = 1;
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}
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/* 500000 ppm is 0.5, which is used to round up values */
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delta *= (int)div64_u64((uint64_t)rate *
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(uint64_t)adjustment + 500000, 1000000);
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rate_adjusted = rate + delta;
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/* Adjusted rate should never be == 0 */
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if (!rate_adjusted)
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return -EINVAL;
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ret = clk_set_rate(player->clk, rate_adjusted);
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if (ret < 0)
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return ret;
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rate_achieved = clk_get_rate(player->clk);
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if (!rate_achieved)
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/* If value is 0 means that clock or parent not valid */
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return -EINVAL;
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/*
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* Using ALSA's adjustment control, we can modify the rate to be up
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* to twice as much as requested, but no more
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*/
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delta = rate_achieved - rate;
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if (delta < 0) {
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/* div64_64 operates on unsigned values... */
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delta = -delta;
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adjustment = -1;
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} else {
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adjustment = 1;
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}
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/* Frequency/2 is added to round up result */
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adjustment *= (int)div64_u64((uint64_t)delta * 1000000 + rate / 2,
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rate);
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player->clk_adj = adjustment;
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return 0;
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}
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static void uni_player_set_channel_status(struct uniperif *player,
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struct snd_pcm_runtime *runtime)
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{
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int n;
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unsigned int status;
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/*
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* Some AVRs and TVs require the channel status to contain a correct
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* sampling frequency. If no sample rate is already specified, then
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* set one.
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*/
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if (runtime) {
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switch (runtime->rate) {
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case 22050:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_22050;
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break;
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case 44100:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_44100;
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break;
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case 88200:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_88200;
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break;
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case 176400:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_176400;
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break;
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case 24000:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_24000;
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break;
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case 48000:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_48000;
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break;
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case 96000:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_96000;
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break;
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case 192000:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_192000;
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break;
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case 32000:
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_32000;
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break;
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default:
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/* Mark as sampling frequency not indicated */
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player->stream_settings.iec958.status[3] =
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IEC958_AES3_CON_FS_NOTID;
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break;
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}
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}
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/* Audio mode:
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* Use audio mode status to select PCM or encoded mode
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*/
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if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO)
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player->stream_settings.encoding_mode =
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UNIPERIF_IEC958_ENCODING_MODE_ENCODED;
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else
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player->stream_settings.encoding_mode =
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UNIPERIF_IEC958_ENCODING_MODE_PCM;
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if (player->stream_settings.encoding_mode ==
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UNIPERIF_IEC958_ENCODING_MODE_PCM)
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/* Clear user validity bits */
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SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);
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else
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/* Set user validity bits */
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SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 1);
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/* Program the new channel status */
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for (n = 0; n < 6; ++n) {
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status =
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player->stream_settings.iec958.status[0 + (n * 4)] & 0xf;
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status |=
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player->stream_settings.iec958.status[1 + (n * 4)] << 8;
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status |=
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player->stream_settings.iec958.status[2 + (n * 4)] << 16;
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status |=
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player->stream_settings.iec958.status[3 + (n * 4)] << 24;
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SET_UNIPERIF_CHANNEL_STA_REGN(player, n, status);
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}
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/* Update the channel status */
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if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
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SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
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else
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SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);
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}
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static int uni_player_prepare_iec958(struct uniperif *player,
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struct snd_pcm_runtime *runtime)
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{
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int clk_div;
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clk_div = player->mclk / runtime->rate;
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/* Oversampling must be multiple of 128 as iec958 frame is 32-bits */
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if ((clk_div % 128) || (clk_div <= 0)) {
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dev_err(player->dev, "%s: invalid clk_div %d\n",
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__func__, clk_div);
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return -EINVAL;
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}
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switch (runtime->format) {
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case SNDRV_PCM_FORMAT_S16_LE:
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/* 16/16 memory format */
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SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
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/* 16-bits per sub-frame */
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SET_UNIPERIF_I2S_FMT_NBIT_32(player);
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/* Set 16-bit sample precision */
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SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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/* 16/0 memory format */
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SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
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/* 32-bits per sub-frame */
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SET_UNIPERIF_I2S_FMT_NBIT_32(player);
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/* Set 24-bit sample precision */
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SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player);
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break;
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default:
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dev_err(player->dev, "format not supported\n");
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return -EINVAL;
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}
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/* Set parity to be calculated by the hardware */
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SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player);
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/* Set channel status bits to be inserted by the hardware */
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SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player);
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/* Set user data bits to be inserted by the hardware */
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SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player);
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/* Set validity bits to be inserted by the hardware */
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SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player);
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/* Set full software control to disabled */
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SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player);
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SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player);
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mutex_lock(&player->ctrl_lock);
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/* Update the channel status */
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uni_player_set_channel_status(player, runtime);
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mutex_unlock(&player->ctrl_lock);
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/* Clear the user validity user bits */
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SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);
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/* Disable one-bit audio mode */
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SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);
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/* Enable consecutive frames repetition of Z preamble (not for HBRA) */
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SET_UNIPERIF_CONFIG_REPEAT_CHL_STS_ENABLE(player);
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/* Change to SUF0_SUBF1 and left/right channels swap! */
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SET_UNIPERIF_CONFIG_SUBFRAME_SEL_SUBF1_SUBF0(player);
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/* Set data output as MSB first */
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SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
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if (player->stream_settings.encoding_mode ==
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UNIPERIF_IEC958_ENCODING_MODE_ENCODED)
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SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_ON(player);
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else
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SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_OFF(player);
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SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);
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/* Set rounding to off */
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SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
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/* Set clock divisor */
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SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / 128);
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/* Set the spdif latency to not wait before starting player */
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SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
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/*
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* Ensure iec958 formatting is off. It will be enabled in function
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* uni_player_start() at the same time as the operation
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* mode is set to work around a silicon issue.
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*/
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if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
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SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
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else
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SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);
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return 0;
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}
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static int uni_player_prepare_pcm(struct uniperif *player,
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struct snd_pcm_runtime *runtime)
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{
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int output_frame_size, slot_width, clk_div;
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/* Force slot width to 32 in I2S mode (HW constraint) */
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if ((player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) ==
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SND_SOC_DAIFMT_I2S)
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slot_width = 32;
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else
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slot_width = snd_pcm_format_width(runtime->format);
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output_frame_size = slot_width * runtime->channels;
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clk_div = player->mclk / runtime->rate;
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/*
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* For 32 bits subframe clk_div must be a multiple of 128,
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* for 16 bits must be a multiple of 64
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*/
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if ((slot_width == 32) && (clk_div % 128)) {
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dev_err(player->dev, "%s: invalid clk_div\n", __func__);
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return -EINVAL;
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}
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if ((slot_width == 16) && (clk_div % 64)) {
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dev_err(player->dev, "%s: invalid clk_div\n", __func__);
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return -EINVAL;
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}
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/*
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* Number of bits per subframe (which is one channel sample)
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* on output - Transfer 16 or 32 bits from FIFO
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*/
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switch (slot_width) {
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case 32:
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SET_UNIPERIF_I2S_FMT_NBIT_32(player);
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SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
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break;
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case 16:
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SET_UNIPERIF_I2S_FMT_NBIT_16(player);
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SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
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break;
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default:
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dev_err(player->dev, "subframe format not supported\n");
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return -EINVAL;
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}
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/* Configure data memory format */
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switch (runtime->format) {
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case SNDRV_PCM_FORMAT_S16_LE:
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/* One data word contains two samples */
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SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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/*
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* Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
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* on the left than zeros (if less than 32 bytes)"... ;-)
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*/
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SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
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break;
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default:
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dev_err(player->dev, "format not supported\n");
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return -EINVAL;
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}
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/* Set rounding to off */
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SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
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/* Set clock divisor */
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SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / (2 * output_frame_size));
|
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|
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/* Number of channelsmust be even*/
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if ((runtime->channels % 2) || (runtime->channels < 2) ||
|
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(runtime->channels > 10)) {
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dev_err(player->dev, "%s: invalid nb of channels\n", __func__);
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return -EINVAL;
|
|
}
|
|
|
|
SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);
|
|
|
|
/* Set 1-bit audio format to disabled */
|
|
SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);
|
|
|
|
SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
|
|
|
|
/* No iec958 formatting as outputting to DAC */
|
|
SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int uni_player_prepare_tdm(struct uniperif *player,
|
|
struct snd_pcm_runtime *runtime)
|
|
{
|
|
int tdm_frame_size; /* unip tdm frame size in bytes */
|
|
int user_frame_size; /* user tdm frame size in bytes */
|
|
/* default unip TDM_WORD_POS_X_Y */
|
|
unsigned int word_pos[4] = {
|
|
0x04060002, 0x0C0E080A, 0x14161012, 0x1C1E181A};
|
|
int freq, ret;
|
|
|
|
tdm_frame_size =
|
|
sti_uniperiph_get_unip_tdm_frame_size(player);
|
|
user_frame_size =
|
|
sti_uniperiph_get_user_frame_size(runtime);
|
|
|
|
/* fix 16/0 format */
|
|
SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
|
|
SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
|
|
|
|
/* number of words inserted on the TDM line */
|
|
SET_UNIPERIF_I2S_FMT_NUM_CH(player, user_frame_size / 4 / 2);
|
|
|
|
SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
|
|
SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
|
|
|
|
/* Enable the tdm functionality */
|
|
SET_UNIPERIF_TDM_ENABLE_TDM_ENABLE(player);
|
|
|
|
/* number of 8 bits timeslots avail in unip tdm frame */
|
|
SET_UNIPERIF_TDM_FS_REF_DIV_NUM_TIMESLOT(player, tdm_frame_size);
|
|
|
|
/* set the timeslot allocation for words in FIFO */
|
|
sti_uniperiph_get_tdm_word_pos(player, word_pos);
|
|
SET_UNIPERIF_TDM_WORD_POS(player, 1_2, word_pos[WORD_1_2]);
|
|
SET_UNIPERIF_TDM_WORD_POS(player, 3_4, word_pos[WORD_3_4]);
|
|
SET_UNIPERIF_TDM_WORD_POS(player, 5_6, word_pos[WORD_5_6]);
|
|
SET_UNIPERIF_TDM_WORD_POS(player, 7_8, word_pos[WORD_7_8]);
|
|
|
|
/* set unip clk rate (not done vai set_sysclk ops) */
|
|
freq = runtime->rate * tdm_frame_size * 8;
|
|
mutex_lock(&player->ctrl_lock);
|
|
ret = uni_player_clk_set_rate(player, freq);
|
|
if (!ret)
|
|
player->mclk = freq;
|
|
mutex_unlock(&player->ctrl_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ALSA uniperipheral iec958 controls
|
|
*/
|
|
static int uni_player_ctl_iec958_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
|
|
uinfo->count = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int uni_player_ctl_iec958_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
|
|
|
|
mutex_lock(&player->ctrl_lock);
|
|
ucontrol->value.iec958.status[0] = iec958->status[0];
|
|
ucontrol->value.iec958.status[1] = iec958->status[1];
|
|
ucontrol->value.iec958.status[2] = iec958->status[2];
|
|
ucontrol->value.iec958.status[3] = iec958->status[3];
|
|
mutex_unlock(&player->ctrl_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
|
|
unsigned long flags;
|
|
|
|
mutex_lock(&player->ctrl_lock);
|
|
iec958->status[0] = ucontrol->value.iec958.status[0];
|
|
iec958->status[1] = ucontrol->value.iec958.status[1];
|
|
iec958->status[2] = ucontrol->value.iec958.status[2];
|
|
iec958->status[3] = ucontrol->value.iec958.status[3];
|
|
|
|
spin_lock_irqsave(&player->irq_lock, flags);
|
|
if (player->substream && player->substream->runtime)
|
|
uni_player_set_channel_status(player,
|
|
player->substream->runtime);
|
|
else
|
|
uni_player_set_channel_status(player, NULL);
|
|
|
|
spin_unlock_irqrestore(&player->irq_lock, flags);
|
|
mutex_unlock(&player->ctrl_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_kcontrol_new uni_player_iec958_ctl = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
|
.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
|
|
.info = uni_player_ctl_iec958_info,
|
|
.get = uni_player_ctl_iec958_get,
|
|
.put = uni_player_ctl_iec958_put,
|
|
};
|
|
|
|
/*
|
|
* uniperif rate adjustement control
|
|
*/
|
|
static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
|
|
uinfo->count = 1;
|
|
uinfo->value.integer.min = UNIPERIF_PLAYER_CLK_ADJ_MIN;
|
|
uinfo->value.integer.max = UNIPERIF_PLAYER_CLK_ADJ_MAX;
|
|
uinfo->value.integer.step = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
|
|
mutex_lock(&player->ctrl_lock);
|
|
ucontrol->value.integer.value[0] = player->clk_adj;
|
|
mutex_unlock(&player->ctrl_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
int ret = 0;
|
|
|
|
if ((ucontrol->value.integer.value[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN) ||
|
|
(ucontrol->value.integer.value[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&player->ctrl_lock);
|
|
player->clk_adj = ucontrol->value.integer.value[0];
|
|
|
|
if (player->mclk)
|
|
ret = uni_player_clk_set_rate(player, player->mclk);
|
|
mutex_unlock(&player->ctrl_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct snd_kcontrol_new uni_player_clk_adj_ctl = {
|
|
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
|
.name = "PCM Playback Oversampling Freq. Adjustment",
|
|
.info = snd_sti_clk_adjustment_info,
|
|
.get = snd_sti_clk_adjustment_get,
|
|
.put = snd_sti_clk_adjustment_put,
|
|
};
|
|
|
|
static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = {
|
|
&uni_player_clk_adj_ctl,
|
|
};
|
|
|
|
static struct snd_kcontrol_new *snd_sti_iec_ctl[] = {
|
|
&uni_player_iec958_ctl,
|
|
&uni_player_clk_adj_ctl,
|
|
};
|
|
|
|
static int uni_player_startup(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&player->irq_lock, flags);
|
|
player->substream = substream;
|
|
spin_unlock_irqrestore(&player->irq_lock, flags);
|
|
|
|
player->clk_adj = 0;
|
|
|
|
if (!UNIPERIF_TYPE_IS_TDM(player))
|
|
return 0;
|
|
|
|
/* refine hw constraint in tdm mode */
|
|
ret = snd_pcm_hw_rule_add(substream->runtime, 0,
|
|
SNDRV_PCM_HW_PARAM_CHANNELS,
|
|
sti_uniperiph_fix_tdm_chan,
|
|
player, SNDRV_PCM_HW_PARAM_CHANNELS,
|
|
-1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return snd_pcm_hw_rule_add(substream->runtime, 0,
|
|
SNDRV_PCM_HW_PARAM_FORMAT,
|
|
sti_uniperiph_fix_tdm_format,
|
|
player, SNDRV_PCM_HW_PARAM_FORMAT,
|
|
-1);
|
|
}
|
|
|
|
static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id,
|
|
unsigned int freq, int dir)
|
|
{
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
int ret;
|
|
|
|
if (UNIPERIF_TYPE_IS_TDM(player) || (dir == SND_SOC_CLOCK_IN))
|
|
return 0;
|
|
|
|
if (clk_id != 0)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&player->ctrl_lock);
|
|
ret = uni_player_clk_set_rate(player, freq);
|
|
if (!ret)
|
|
player->mclk = freq;
|
|
mutex_unlock(&player->ctrl_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int uni_player_prepare(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
int transfer_size, trigger_limit;
|
|
int ret;
|
|
|
|
/* The player should be stopped */
|
|
if (player->state != UNIPERIF_STATE_STOPPED) {
|
|
dev_err(player->dev, "%s: invalid player state %d\n", __func__,
|
|
player->state);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Calculate transfer size (in fifo cells and bytes) for frame count */
|
|
if (player->type == SND_ST_UNIPERIF_TYPE_TDM) {
|
|
/* transfer size = user frame size (in 32 bits FIFO cell) */
|
|
transfer_size =
|
|
sti_uniperiph_get_user_frame_size(runtime) / 4;
|
|
} else {
|
|
transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;
|
|
}
|
|
|
|
/* Calculate number of empty cells available before asserting DREQ */
|
|
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
|
|
trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size;
|
|
} else {
|
|
/*
|
|
* Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
|
|
* FDMA_TRIGGER_LIMIT also controls when the state switches
|
|
* from OFF or STANDBY to AUDIO DATA.
|
|
*/
|
|
trigger_limit = transfer_size;
|
|
}
|
|
|
|
/* Trigger limit must be an even number */
|
|
if ((!trigger_limit % 2) || (trigger_limit != 1 && transfer_size % 2) ||
|
|
(trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player))) {
|
|
dev_err(player->dev, "invalid trigger limit %d\n",
|
|
trigger_limit);
|
|
return -EINVAL;
|
|
}
|
|
|
|
SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit);
|
|
|
|
/* Uniperipheral setup depends on player type */
|
|
switch (player->type) {
|
|
case SND_ST_UNIPERIF_TYPE_HDMI:
|
|
ret = uni_player_prepare_iec958(player, runtime);
|
|
break;
|
|
case SND_ST_UNIPERIF_TYPE_PCM:
|
|
ret = uni_player_prepare_pcm(player, runtime);
|
|
break;
|
|
case SND_ST_UNIPERIF_TYPE_SPDIF:
|
|
ret = uni_player_prepare_iec958(player, runtime);
|
|
break;
|
|
case SND_ST_UNIPERIF_TYPE_TDM:
|
|
ret = uni_player_prepare_tdm(player, runtime);
|
|
break;
|
|
default:
|
|
dev_err(player->dev, "invalid player type\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (player->daifmt & SND_SOC_DAIFMT_INV_MASK) {
|
|
case SND_SOC_DAIFMT_NB_NF:
|
|
SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
|
|
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
|
|
break;
|
|
case SND_SOC_DAIFMT_NB_IF:
|
|
SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
|
|
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
|
|
break;
|
|
case SND_SOC_DAIFMT_IB_NF:
|
|
SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
|
|
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
|
|
break;
|
|
case SND_SOC_DAIFMT_IB_IF:
|
|
SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
|
|
SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
|
|
break;
|
|
}
|
|
|
|
switch (player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
|
case SND_SOC_DAIFMT_I2S:
|
|
SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
|
|
SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player);
|
|
break;
|
|
case SND_SOC_DAIFMT_LEFT_J:
|
|
SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
|
|
SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
|
|
break;
|
|
case SND_SOC_DAIFMT_RIGHT_J:
|
|
SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player);
|
|
SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
|
|
break;
|
|
default:
|
|
dev_err(player->dev, "format not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0);
|
|
|
|
|
|
return sti_uniperiph_reset(player);
|
|
}
|
|
|
|
static int uni_player_start(struct uniperif *player)
|
|
{
|
|
int ret;
|
|
|
|
/* The player should be stopped */
|
|
if (player->state != UNIPERIF_STATE_STOPPED) {
|
|
dev_err(player->dev, "%s: invalid player state\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = clk_prepare_enable(player->clk);
|
|
if (ret) {
|
|
dev_err(player->dev, "%s: Failed to enable clock\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
/* Clear any pending interrupts */
|
|
SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player));
|
|
|
|
/* Set the interrupt mask */
|
|
SET_UNIPERIF_ITM_BSET_DMA_ERROR(player);
|
|
SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player);
|
|
|
|
/* Enable underflow recovery interrupts */
|
|
if (player->underflow_enabled) {
|
|
SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player);
|
|
SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player);
|
|
}
|
|
|
|
ret = sti_uniperiph_reset(player);
|
|
if (ret < 0) {
|
|
clk_disable_unprepare(player->clk);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Does not use IEC61937 features of the uniperipheral hardware.
|
|
* Instead it performs IEC61937 in software and inserts it directly
|
|
* into the audio data stream. As such, when encoded mode is selected,
|
|
* linear pcm mode is still used, but with the differences of the
|
|
* channel status bits set for encoded mode and the validity bits set.
|
|
*/
|
|
SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player);
|
|
|
|
/*
|
|
* If iec958 formatting is required for hdmi or spdif, then it must be
|
|
* enabled after the operation mode is set. If set prior to this, it
|
|
* will not take affect and hang the player.
|
|
*/
|
|
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
|
|
if (UNIPERIF_TYPE_IS_IEC958(player))
|
|
SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);
|
|
|
|
/* Force channel status update (no update if clk disable) */
|
|
if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
|
|
SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
|
|
else
|
|
SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);
|
|
|
|
/* Update state to started */
|
|
player->state = UNIPERIF_STATE_STARTED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int uni_player_stop(struct uniperif *player)
|
|
{
|
|
int ret;
|
|
|
|
/* The player should not be in stopped state */
|
|
if (player->state == UNIPERIF_STATE_STOPPED) {
|
|
dev_err(player->dev, "%s: invalid player state\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Turn the player off */
|
|
SET_UNIPERIF_CTRL_OPERATION_OFF(player);
|
|
|
|
ret = sti_uniperiph_reset(player);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Disable interrupts */
|
|
SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player));
|
|
|
|
/* Disable clock */
|
|
clk_disable_unprepare(player->clk);
|
|
|
|
/* Update state to stopped and return */
|
|
player->state = UNIPERIF_STATE_STOPPED;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int uni_player_resume(struct uniperif *player)
|
|
{
|
|
int ret;
|
|
|
|
/* Select the frequency synthesizer clock */
|
|
if (player->clk_sel) {
|
|
ret = regmap_field_write(player->clk_sel, 1);
|
|
if (ret) {
|
|
dev_err(player->dev,
|
|
"%s: Failed to select freq synth clock\n",
|
|
__func__);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
|
|
SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
|
|
SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
|
|
SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(uni_player_resume);
|
|
|
|
static int uni_player_trigger(struct snd_pcm_substream *substream,
|
|
int cmd, struct snd_soc_dai *dai)
|
|
{
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
return uni_player_start(player);
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
return uni_player_stop(player);
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
return uni_player_resume(player);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static void uni_player_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
struct uniperif *player = priv->dai_data.uni;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&player->irq_lock, flags);
|
|
if (player->state != UNIPERIF_STATE_STOPPED)
|
|
/* Stop the player */
|
|
uni_player_stop(player);
|
|
|
|
player->substream = NULL;
|
|
spin_unlock_irqrestore(&player->irq_lock, flags);
|
|
}
|
|
|
|
static int uni_player_parse_dt_audio_glue(struct platform_device *pdev,
|
|
struct uniperif *player)
|
|
{
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct regmap *regmap;
|
|
struct reg_field regfield[2] = {
|
|
/* PCM_CLK_SEL */
|
|
REG_FIELD(SYS_CFG_AUDIO_GLUE,
|
|
8 + player->id,
|
|
8 + player->id),
|
|
/* PCMP_VALID_SEL */
|
|
REG_FIELD(SYS_CFG_AUDIO_GLUE, 0, 1)
|
|
};
|
|
|
|
regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg");
|
|
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
player->clk_sel = regmap_field_alloc(regmap, regfield[0]);
|
|
player->valid_sel = regmap_field_alloc(regmap, regfield[1]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops uni_player_dai_ops = {
|
|
.startup = uni_player_startup,
|
|
.shutdown = uni_player_shutdown,
|
|
.prepare = uni_player_prepare,
|
|
.trigger = uni_player_trigger,
|
|
.hw_params = sti_uniperiph_dai_hw_params,
|
|
.set_fmt = sti_uniperiph_dai_set_fmt,
|
|
.set_sysclk = uni_player_set_sysclk,
|
|
.set_tdm_slot = sti_uniperiph_set_tdm_slot
|
|
};
|
|
|
|
int uni_player_init(struct platform_device *pdev,
|
|
struct uniperif *player)
|
|
{
|
|
int ret = 0;
|
|
|
|
player->dev = &pdev->dev;
|
|
player->state = UNIPERIF_STATE_STOPPED;
|
|
player->dai_ops = &uni_player_dai_ops;
|
|
|
|
/* Get PCM_CLK_SEL & PCMP_VALID_SEL from audio-glue-ctrl SoC reg */
|
|
ret = uni_player_parse_dt_audio_glue(pdev, player);
|
|
|
|
if (ret < 0) {
|
|
dev_err(player->dev, "Failed to parse DeviceTree\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Underflow recovery is only supported on later ip revisions */
|
|
if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
|
|
player->underflow_enabled = 1;
|
|
|
|
if (UNIPERIF_TYPE_IS_TDM(player))
|
|
player->hw = &uni_tdm_hw;
|
|
else
|
|
player->hw = &uni_player_pcm_hw;
|
|
|
|
/* Get uniperif resource */
|
|
player->clk = of_clk_get(pdev->dev.of_node, 0);
|
|
if (IS_ERR(player->clk)) {
|
|
dev_err(player->dev, "Failed to get clock\n");
|
|
return PTR_ERR(player->clk);
|
|
}
|
|
|
|
/* Select the frequency synthesizer clock */
|
|
if (player->clk_sel) {
|
|
ret = regmap_field_write(player->clk_sel, 1);
|
|
if (ret) {
|
|
dev_err(player->dev,
|
|
"%s: Failed to select freq synth clock\n",
|
|
__func__);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* connect to I2S/TDM TX bus */
|
|
if (player->valid_sel &&
|
|
(player->id == UNIPERIF_PLAYER_I2S_OUT)) {
|
|
ret = regmap_field_write(player->valid_sel, player->id);
|
|
if (ret) {
|
|
dev_err(player->dev,
|
|
"%s: unable to connect to tdm bus\n", __func__);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = devm_request_irq(&pdev->dev, player->irq,
|
|
uni_player_irq_handler, IRQF_SHARED,
|
|
dev_name(&pdev->dev), player);
|
|
if (ret < 0) {
|
|
dev_err(player->dev, "unable to request IRQ %d\n", player->irq);
|
|
return ret;
|
|
}
|
|
|
|
mutex_init(&player->ctrl_lock);
|
|
spin_lock_init(&player->irq_lock);
|
|
|
|
/* Ensure that disabled by default */
|
|
SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
|
|
SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
|
|
SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
|
|
SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);
|
|
|
|
if (UNIPERIF_TYPE_IS_IEC958(player)) {
|
|
/* Set default iec958 status bits */
|
|
|
|
/* Consumer, PCM, copyright, 2ch, mode 0 */
|
|
player->stream_settings.iec958.status[0] = 0x00;
|
|
/* Broadcast reception category */
|
|
player->stream_settings.iec958.status[1] =
|
|
IEC958_AES1_CON_GENERAL;
|
|
/* Do not take into account source or channel number */
|
|
player->stream_settings.iec958.status[2] =
|
|
IEC958_AES2_CON_SOURCE_UNSPEC;
|
|
/* Sampling frequency not indicated */
|
|
player->stream_settings.iec958.status[3] =
|
|
IEC958_AES3_CON_FS_NOTID;
|
|
/* Max sample word 24-bit, sample word length not indicated */
|
|
player->stream_settings.iec958.status[4] =
|
|
IEC958_AES4_CON_MAX_WORDLEN_24 |
|
|
IEC958_AES4_CON_WORDLEN_24_20;
|
|
|
|
player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl);
|
|
player->snd_ctrls = snd_sti_iec_ctl[0];
|
|
} else {
|
|
player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl);
|
|
player->snd_ctrls = snd_sti_pcm_ctl[0];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(uni_player_init);
|