Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) STMicroelectronics SA 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *          for STMicroelectronics.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <sound/soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include "uniperif.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #define UNIPERIF_READER_I2S_IN 0 /* reader id connected to I2S/TDM TX bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * integrate unireader capability in term of rate and supported channels
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) static const struct snd_pcm_hardware uni_reader_pcm_hw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 		SNDRV_PCM_INFO_MMAP_VALID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	.rates = SNDRV_PCM_RATE_CONTINUOUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	.rate_min = 8000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	.rate_max = 96000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	.channels_min = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	.channels_max = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	.periods_min = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	.periods_max = 48,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	.period_bytes_min = 128,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	.period_bytes_max = 64 * PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	.buffer_bytes_max = 256 * PAGE_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  * uni_reader_irq_handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * In case of error audio stream is stopped; stop action is protected via PCM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * stream lock  to avoid race condition with trigger callback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) static irqreturn_t uni_reader_irq_handler(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	irqreturn_t ret = IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct uniperif *reader = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	unsigned int status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	spin_lock(&reader->irq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	if (!reader->substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		goto irq_spin_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	snd_pcm_stream_lock(reader->substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (reader->state == UNIPERIF_STATE_STOPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		/* Unexpected IRQ: do nothing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		dev_warn(reader->dev, "unexpected IRQ\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		goto stream_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	/* Get interrupt status & clear them immediately */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	status = GET_UNIPERIF_ITS(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	SET_UNIPERIF_ITS_BCLR(reader, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	/* Check for fifo overflow error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(reader))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		dev_err(reader->dev, "FIFO error detected\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		snd_pcm_stop(reader->substream, SNDRV_PCM_STATE_XRUN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		ret = IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) stream_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	snd_pcm_stream_unlock(reader->substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) irq_spin_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	spin_unlock(&reader->irq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static int uni_reader_prepare_pcm(struct snd_pcm_runtime *runtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				  struct uniperif *reader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	int slot_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	/* Force slot width to 32 in I2S mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	if ((reader->daifmt & SND_SOC_DAIFMT_FORMAT_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		== SND_SOC_DAIFMT_I2S) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		slot_width = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		switch (runtime->format) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		case SNDRV_PCM_FORMAT_S16_LE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			slot_width = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			slot_width = 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	/* Number of bits per subframe (i.e one channel sample) on input. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	switch (slot_width) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	case 32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		SET_UNIPERIF_I2S_FMT_NBIT_32(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	case 16:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		SET_UNIPERIF_I2S_FMT_NBIT_16(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		dev_err(reader->dev, "subframe format not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	/* Configure data memory format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	switch (runtime->format) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	case SNDRV_PCM_FORMAT_S16_LE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		/* One data word contains two samples */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		SET_UNIPERIF_CONFIG_MEM_FMT_16_16(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	case SNDRV_PCM_FORMAT_S32_LE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		 * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		 * on the MSB then zeros (if less than 32 bytes)"...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		SET_UNIPERIF_CONFIG_MEM_FMT_16_0(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		dev_err(reader->dev, "format not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	/* Number of channels must be even */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if ((runtime->channels % 2) || (runtime->channels < 2) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	    (runtime->channels > 10)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		dev_err(reader->dev, "%s: invalid nb of channels\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	SET_UNIPERIF_I2S_FMT_NUM_CH(reader, runtime->channels / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	SET_UNIPERIF_I2S_FMT_ORDER_MSB(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static int uni_reader_prepare_tdm(struct snd_pcm_runtime *runtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 				  struct uniperif *reader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	int frame_size; /* user tdm frame size in bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	/* default unip TDM_WORD_POS_X_Y */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	unsigned int word_pos[4] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		0x04060002, 0x0C0E080A, 0x14161012, 0x1C1E181A};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	frame_size = sti_uniperiph_get_user_frame_size(runtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/* fix 16/0 format */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	SET_UNIPERIF_CONFIG_MEM_FMT_16_0(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	/* number of words inserted on the TDM line */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	SET_UNIPERIF_I2S_FMT_NUM_CH(reader, frame_size / 4 / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	SET_UNIPERIF_I2S_FMT_ORDER_MSB(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	SET_UNIPERIF_TDM_ENABLE_TDM_ENABLE(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	 * set the timeslots allocation for words in FIFO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	 * HW bug: (LSB word < MSB word) => this config is not possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	 *         So if we want (LSB word < MSB) word, then it shall be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	 *         handled by user
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	sti_uniperiph_get_tdm_word_pos(reader, word_pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	SET_UNIPERIF_TDM_WORD_POS(reader, 1_2, word_pos[WORD_1_2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	SET_UNIPERIF_TDM_WORD_POS(reader, 3_4, word_pos[WORD_3_4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	SET_UNIPERIF_TDM_WORD_POS(reader, 5_6, word_pos[WORD_5_6]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	SET_UNIPERIF_TDM_WORD_POS(reader, 7_8, word_pos[WORD_7_8]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int uni_reader_prepare(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 			      struct snd_soc_dai *dai)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	struct uniperif *reader = priv->dai_data.uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct snd_pcm_runtime *runtime = substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	int transfer_size, trigger_limit, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	/* The reader should be stopped */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (reader->state != UNIPERIF_STATE_STOPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		dev_err(reader->dev, "%s: invalid reader state %d\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 			reader->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	/* Calculate transfer size (in fifo cells and bytes) for frame count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	if (reader->type == SND_ST_UNIPERIF_TYPE_TDM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		/* transfer size = unip frame size (in 32 bits FIFO cell) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		transfer_size =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			sti_uniperiph_get_user_frame_size(runtime) / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	/* Calculate number of empty cells available before asserting DREQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	if (reader->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		 * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		 * FDMA_TRIGGER_LIMIT also controls when the state switches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		 * from OFF or STANDBY to AUDIO DATA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		trigger_limit = transfer_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	/* Trigger limit must be an even number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	if ((!trigger_limit % 2) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	    (trigger_limit != 1 && transfer_size % 2) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	    (trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(reader))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		dev_err(reader->dev, "invalid trigger limit %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			trigger_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(reader, trigger_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (UNIPERIF_TYPE_IS_TDM(reader))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		ret = uni_reader_prepare_tdm(runtime, reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		ret = uni_reader_prepare_pcm(runtime, reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	switch (reader->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	case SND_SOC_DAIFMT_I2S:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	case SND_SOC_DAIFMT_LEFT_J:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	case SND_SOC_DAIFMT_RIGHT_J:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		dev_err(reader->dev, "format not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	/* Data clocking (changing) on the rising/falling edge */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	switch (reader->daifmt & SND_SOC_DAIFMT_INV_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	case SND_SOC_DAIFMT_NB_NF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		SET_UNIPERIF_I2S_FMT_LR_POL_LOW(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	case SND_SOC_DAIFMT_NB_IF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		SET_UNIPERIF_I2S_FMT_LR_POL_HIG(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	case SND_SOC_DAIFMT_IB_NF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		SET_UNIPERIF_I2S_FMT_LR_POL_LOW(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	case SND_SOC_DAIFMT_IB_IF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		SET_UNIPERIF_I2S_FMT_LR_POL_HIG(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	/* Clear any pending interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	SET_UNIPERIF_ITS_BCLR(reader, GET_UNIPERIF_ITS(reader));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(reader, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	/* Set the interrupt mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	SET_UNIPERIF_ITM_BSET_DMA_ERROR(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	SET_UNIPERIF_ITM_BSET_FIFO_ERROR(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	SET_UNIPERIF_ITM_BSET_MEM_BLK_READ(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	/* Enable underflow recovery interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	if (reader->underflow_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	/* Reset uniperipheral reader */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	return sti_uniperiph_reset(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static int uni_reader_start(struct uniperif *reader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	/* The reader should be stopped */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	if (reader->state != UNIPERIF_STATE_STOPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		dev_err(reader->dev, "%s: invalid reader state\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	/* Enable reader interrupts (and clear possible stalled ones) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	SET_UNIPERIF_ITS_BCLR_FIFO_ERROR(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	SET_UNIPERIF_ITM_BSET_FIFO_ERROR(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	/* Launch the reader */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	/* Update state to started */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	reader->state = UNIPERIF_STATE_STARTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static int uni_reader_stop(struct uniperif *reader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	/* The reader should not be in stopped state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	if (reader->state == UNIPERIF_STATE_STOPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		dev_err(reader->dev, "%s: invalid reader state\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	/* Turn the reader off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	SET_UNIPERIF_CTRL_OPERATION_OFF(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	/* Disable interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	SET_UNIPERIF_ITM_BCLR(reader, GET_UNIPERIF_ITM(reader));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	/* Update state to stopped and return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	reader->state = UNIPERIF_STATE_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static int  uni_reader_trigger(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 			       int cmd, struct snd_soc_dai *dai)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	struct uniperif *reader = priv->dai_data.uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	case SNDRV_PCM_TRIGGER_START:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		return  uni_reader_start(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	case SNDRV_PCM_TRIGGER_STOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		return  uni_reader_stop(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static int uni_reader_startup(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 			      struct snd_soc_dai *dai)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	struct uniperif *reader = priv->dai_data.uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	spin_lock_irqsave(&reader->irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	reader->substream = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	spin_unlock_irqrestore(&reader->irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	if (!UNIPERIF_TYPE_IS_TDM(reader))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	/* refine hw constraint in tdm mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	ret = snd_pcm_hw_rule_add(substream->runtime, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 				  SNDRV_PCM_HW_PARAM_CHANNELS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 				  sti_uniperiph_fix_tdm_chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 				  reader, SNDRV_PCM_HW_PARAM_CHANNELS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 				  -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	return snd_pcm_hw_rule_add(substream->runtime, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 				   SNDRV_PCM_HW_PARAM_FORMAT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 				   sti_uniperiph_fix_tdm_format,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 				   reader, SNDRV_PCM_HW_PARAM_FORMAT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 				   -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) static void uni_reader_shutdown(struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 				struct snd_soc_dai *dai)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	struct uniperif *reader = priv->dai_data.uni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	spin_lock_irqsave(&reader->irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	if (reader->state != UNIPERIF_STATE_STOPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		/* Stop the reader */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		uni_reader_stop(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	reader->substream = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	spin_unlock_irqrestore(&reader->irq_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) static const struct snd_soc_dai_ops uni_reader_dai_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 		.startup = uni_reader_startup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		.shutdown = uni_reader_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 		.prepare = uni_reader_prepare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		.trigger = uni_reader_trigger,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		.hw_params = sti_uniperiph_dai_hw_params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 		.set_fmt = sti_uniperiph_dai_set_fmt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 		.set_tdm_slot = sti_uniperiph_set_tdm_slot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int uni_reader_init(struct platform_device *pdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		    struct uniperif *reader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	reader->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	reader->state = UNIPERIF_STATE_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	reader->dai_ops = &uni_reader_dai_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	if (UNIPERIF_TYPE_IS_TDM(reader))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		reader->hw = &uni_tdm_hw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		reader->hw = &uni_reader_pcm_hw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	ret = devm_request_irq(&pdev->dev, reader->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 			       uni_reader_irq_handler, IRQF_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 			       dev_name(&pdev->dev), reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 		dev_err(&pdev->dev, "Failed to request IRQ\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 	spin_lock_init(&reader->irq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) EXPORT_SYMBOL_GPL(uni_reader_init);