Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * kirkwood-dma.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * (c) 2010 Arnaud Patard <apatard@mandriva.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/mbus.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <sound/soc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "kirkwood.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) static struct kirkwood_dma_data *kirkwood_priv(struct snd_pcm_substream *subs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	struct snd_soc_pcm_runtime *soc_runtime = subs->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	return snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(soc_runtime, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) static const struct snd_pcm_hardware kirkwood_dma_snd_hw = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	.info = SNDRV_PCM_INFO_INTERLEAVED |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		SNDRV_PCM_INFO_MMAP |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		SNDRV_PCM_INFO_MMAP_VALID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		SNDRV_PCM_INFO_PAUSE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	.buffer_bytes_max	= KIRKWOOD_SND_MAX_BUFFER_BYTES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	.period_bytes_min	= KIRKWOOD_SND_MIN_PERIOD_BYTES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	.period_bytes_max	= KIRKWOOD_SND_MAX_PERIOD_BYTES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	.periods_min		= KIRKWOOD_SND_MIN_PERIODS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	.periods_max		= KIRKWOOD_SND_MAX_PERIODS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	.fifo_size		= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static irqreturn_t kirkwood_dma_irq(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct kirkwood_dma_data *priv = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	unsigned long mask, status, cause;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	mask = readl(priv->io + KIRKWOOD_INT_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	status = readl(priv->io + KIRKWOOD_INT_CAUSE) & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	cause = readl(priv->io + KIRKWOOD_ERR_CAUSE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	if (unlikely(cause)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		printk(KERN_WARNING "%s: got err interrupt 0x%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 				__func__, cause);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		writel(cause, priv->io + KIRKWOOD_ERR_CAUSE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	/* we've enabled only bytes interrupts ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	if (status & ~(KIRKWOOD_INT_CAUSE_PLAY_BYTES | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			KIRKWOOD_INT_CAUSE_REC_BYTES)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		printk(KERN_WARNING "%s: unexpected interrupt %lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 			__func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		return IRQ_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	/* ack int */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	writel(status, priv->io + KIRKWOOD_INT_CAUSE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	if (status & KIRKWOOD_INT_CAUSE_PLAY_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		snd_pcm_period_elapsed(priv->substream_play);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	if (status & KIRKWOOD_INT_CAUSE_REC_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		snd_pcm_period_elapsed(priv->substream_rec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) kirkwood_dma_conf_mbus_windows(void __iomem *base, int win,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			       unsigned long dma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			       const struct mbus_dram_target_info *dram)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	/* First disable and clear windows */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	writel(0, base + KIRKWOOD_AUDIO_WIN_CTRL_REG(win));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	writel(0, base + KIRKWOOD_AUDIO_WIN_BASE_REG(win));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	/* try to find matching cs for current dma address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	for (i = 0; i < dram->num_cs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		const struct mbus_dram_window *cs = dram->cs + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		if ((cs->base & 0xffff0000) < (dma & 0xffff0000)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			writel(cs->base & 0xffff0000,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 				base + KIRKWOOD_AUDIO_WIN_BASE_REG(win));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			writel(((cs->size - 1) & 0xffff0000) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				(cs->mbus_attr << 8) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 				(dram->mbus_dram_target_id << 4) | 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				base + KIRKWOOD_AUDIO_WIN_CTRL_REG(win));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		}
^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) static int kirkwood_dma_open(struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			     struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct snd_pcm_runtime *runtime = substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct kirkwood_dma_data *priv = kirkwood_priv(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	const struct mbus_dram_target_info *dram;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	snd_soc_set_runtime_hwparams(substream, &kirkwood_dma_snd_hw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	/* Ensure that all constraints linked to dma burst are fulfilled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	err = snd_pcm_hw_constraint_minmax(runtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 			priv->burst * 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			KIRKWOOD_AUDIO_BUF_MAX-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	err = snd_pcm_hw_constraint_step(runtime, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			priv->burst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	err = snd_pcm_hw_constraint_step(substream->runtime, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			 SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			 priv->burst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (!priv->substream_play && !priv->substream_rec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		err = request_irq(priv->irq, kirkwood_dma_irq, IRQF_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 				  "kirkwood-i2s", priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		 * Enable Error interrupts. We're only ack'ing them but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		 * it's useful for diagnostics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		writel((unsigned int)-1, priv->io + KIRKWOOD_ERR_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	dram = mv_mbus_dram_info();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	addr = substream->dma_buffer.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		if (priv->substream_play)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		priv->substream_play = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		kirkwood_dma_conf_mbus_windows(priv->io,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			KIRKWOOD_PLAYBACK_WIN, addr, dram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		if (priv->substream_rec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		priv->substream_rec = substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		kirkwood_dma_conf_mbus_windows(priv->io,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			KIRKWOOD_RECORD_WIN, addr, dram);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int kirkwood_dma_close(struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			      struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	struct kirkwood_dma_data *priv = kirkwood_priv(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		priv->substream_play = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		priv->substream_rec = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (!priv->substream_play && !priv->substream_rec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		writel(0, priv->io + KIRKWOOD_ERR_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		free_irq(priv->irq, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static int kirkwood_dma_hw_params(struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 				  struct snd_pcm_substream *substream,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 				  struct snd_pcm_hw_params *params)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct snd_pcm_runtime *runtime = substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	runtime->dma_bytes = params_buffer_bytes(params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static int kirkwood_dma_hw_free(struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 				struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	snd_pcm_set_runtime_buffer(substream, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int kirkwood_dma_prepare(struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 				struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct snd_pcm_runtime *runtime = substream->runtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	struct kirkwood_dma_data *priv = kirkwood_priv(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	unsigned long size, count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	/* compute buffer size in term of "words" as requested in specs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	size = frames_to_bytes(runtime, runtime->buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	size = (size>>2)-1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	count = snd_pcm_lib_period_bytes(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		writel(count, priv->io + KIRKWOOD_PLAY_BYTE_INT_COUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		writel(runtime->dma_addr, priv->io + KIRKWOOD_PLAY_BUF_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		writel(size, priv->io + KIRKWOOD_PLAY_BUF_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		writel(count, priv->io + KIRKWOOD_REC_BYTE_INT_COUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		writel(runtime->dma_addr, priv->io + KIRKWOOD_REC_BUF_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		writel(size, priv->io + KIRKWOOD_REC_BUF_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return 0;
^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) static snd_pcm_uframes_t kirkwood_dma_pointer(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	struct snd_pcm_substream *substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	struct kirkwood_dma_data *priv = kirkwood_priv(substream);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	snd_pcm_uframes_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		count = bytes_to_frames(substream->runtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 			readl(priv->io + KIRKWOOD_PLAY_BYTE_COUNT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		count = bytes_to_frames(substream->runtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 			readl(priv->io + KIRKWOOD_REC_BYTE_COUNT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static int kirkwood_dma_preallocate_dma_buffer(struct snd_pcm *pcm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		int stream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	struct snd_dma_buffer *buf = &substream->dma_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	size_t size = kirkwood_dma_snd_hw.buffer_bytes_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	buf->dev.type = SNDRV_DMA_TYPE_DEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	buf->dev.dev = pcm->card->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	buf->area = dma_alloc_coherent(pcm->card->dev, size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			&buf->addr, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	if (!buf->area)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	buf->bytes = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	buf->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static int kirkwood_dma_new(struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 			    struct snd_soc_pcm_runtime *rtd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	struct snd_card *card = rtd->card->snd_card;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	struct snd_pcm *pcm = rtd->pcm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		ret = kirkwood_dma_preallocate_dma_buffer(pcm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 				SNDRV_PCM_STREAM_PLAYBACK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		ret = kirkwood_dma_preallocate_dma_buffer(pcm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 				SNDRV_PCM_STREAM_CAPTURE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) static void kirkwood_dma_free_dma_buffers(struct snd_soc_component *component,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 					  struct snd_pcm *pcm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	struct snd_pcm_substream *substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	struct snd_dma_buffer *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	int stream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	for (stream = 0; stream < 2; stream++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		substream = pcm->streams[stream].substream;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		if (!substream)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		buf = &substream->dma_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		if (!buf->area)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		dma_free_coherent(pcm->card->dev, buf->bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 				buf->area, buf->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		buf->area = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) const struct snd_soc_component_driver kirkwood_soc_component = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	.name		= DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	.open		= kirkwood_dma_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	.close		= kirkwood_dma_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	.hw_params	= kirkwood_dma_hw_params,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	.hw_free	= kirkwood_dma_hw_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	.prepare	= kirkwood_dma_prepare,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	.pointer	= kirkwood_dma_pointer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	.pcm_construct	= kirkwood_dma_new,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	.pcm_destruct	= kirkwood_dma_free_dma_buffers,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) };