Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 635 insertions, 0 deletions

diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
new file mode 100644
index 000000000..beccfbac7
--- /dev/null
+++ b/sound/soc/sh/rcar/src.c
@@ -0,0 +1,635 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Renesas R-Car SRC support
+//
+// Copyright (C) 2013 Renesas Solutions Corp.
+// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+
+/*
+ * you can enable below define if you don't need
+ * SSI interrupt status debug message when debugging
+ * see rsnd_dbg_irq_status()
+ *
+ * #define RSND_DEBUG_NO_IRQ_STATUS 1
+ */
+
+#include "rsnd.h"
+
+#define SRC_NAME "src"
+
+/* SCU_SYSTEM_STATUS0/1 */
+#define OUF_SRC(id)	((1 << (id + 16)) | (1 << id))
+
+struct rsnd_src {
+	struct rsnd_mod mod;
+	struct rsnd_mod *dma;
+	struct rsnd_kctrl_cfg_s sen;  /* sync convert enable */
+	struct rsnd_kctrl_cfg_s sync; /* sync convert */
+	u32 convert_rate; /* sampling rate convert */
+	int irq;
+};
+
+#define RSND_SRC_NAME_SIZE 16
+
+#define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id)
+#define rsnd_src_nr(priv) ((priv)->src_nr)
+#define rsnd_src_sync_is_enabled(mod) (rsnd_mod_to_src(mod)->sen.val)
+
+#define rsnd_mod_to_src(_mod)				\
+	container_of((_mod), struct rsnd_src, mod)
+
+#define for_each_rsnd_src(pos, priv, i)				\
+	for ((i) = 0;						\
+	     ((i) < rsnd_src_nr(priv)) &&			\
+	     ((pos) = (struct rsnd_src *)(priv)->src + i);	\
+	     i++)
+
+
+/*
+ *		image of SRC (Sampling Rate Converter)
+ *
+ * 96kHz   <-> +-----+	48kHz	+-----+	 48kHz	+-------+
+ * 48kHz   <-> | SRC | <------>	| SSI |	<----->	| codec |
+ * 44.1kHz <-> +-----+		+-----+		+-------+
+ * ...
+ *
+ */
+
+static void rsnd_src_activation(struct rsnd_mod *mod)
+{
+	rsnd_mod_write(mod, SRC_SWRSR, 0);
+	rsnd_mod_write(mod, SRC_SWRSR, 1);
+}
+
+static void rsnd_src_halt(struct rsnd_mod *mod)
+{
+	rsnd_mod_write(mod, SRC_SRCIR, 1);
+	rsnd_mod_write(mod, SRC_SWRSR, 0);
+}
+
+static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io,
+					 struct rsnd_mod *mod)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	int is_play = rsnd_io_is_play(io);
+
+	return rsnd_dma_request_channel(rsnd_src_of_node(priv),
+					mod,
+					is_play ? "rx" : "tx");
+}
+
+static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io,
+				 struct rsnd_mod *mod)
+{
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+	u32 convert_rate;
+
+	if (!runtime)
+		return 0;
+
+	if (!rsnd_src_sync_is_enabled(mod))
+		return src->convert_rate;
+
+	convert_rate = src->sync.val;
+
+	if (!convert_rate)
+		convert_rate = src->convert_rate;
+
+	if (!convert_rate)
+		convert_rate = runtime->rate;
+
+	return convert_rate;
+}
+
+unsigned int rsnd_src_get_rate(struct rsnd_priv *priv,
+			       struct rsnd_dai_stream *io,
+			       int is_in)
+{
+	struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io);
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+	unsigned int rate = 0;
+	int is_play = rsnd_io_is_play(io);
+
+	/*
+	 * Playback
+	 * runtime_rate -> [SRC] -> convert_rate
+	 *
+	 * Capture
+	 * convert_rate -> [SRC] -> runtime_rate
+	 */
+
+	if (is_play == is_in)
+		return runtime->rate;
+
+	/*
+	 * return convert rate if SRC is used,
+	 * otherwise, return runtime->rate as usual
+	 */
+	if (src_mod)
+		rate = rsnd_src_convert_rate(io, src_mod);
+
+	if (!rate)
+		rate = runtime->rate;
+
+	return rate;
+}
+
+static int rsnd_src_hw_params(struct rsnd_mod *mod,
+			      struct rsnd_dai_stream *io,
+			      struct snd_pcm_substream *substream,
+			      struct snd_pcm_hw_params *fe_params)
+{
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+	struct snd_soc_pcm_runtime *fe = substream->private_data;
+
+	/*
+	 * SRC assumes that it is used under DPCM if user want to use
+	 * sampling rate convert. Then, SRC should be FE.
+	 * And then, this function will be called *after* BE settings.
+	 * this means, each BE already has fixuped hw_params.
+	 * see
+	 *	dpcm_fe_dai_hw_params()
+	 *	dpcm_be_dai_hw_params()
+	 */
+	src->convert_rate = 0;
+	if (fe->dai_link->dynamic) {
+		int stream = substream->stream;
+		struct snd_soc_dpcm *dpcm;
+		struct snd_pcm_hw_params *be_params;
+
+		list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+			be_params = &dpcm->hw_params;
+
+			if (params_rate(fe_params) != params_rate(be_params))
+				src->convert_rate = params_rate(be_params);
+		}
+	}
+
+	return 0;
+}
+
+static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io,
+				      struct rsnd_mod *mod)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+	int is_play = rsnd_io_is_play(io);
+	int use_src = 0;
+	u32 fin, fout;
+	u32 ifscr, fsrate, adinr;
+	u32 cr, route;
+	u32 bsdsr, bsisr;
+	u32 i_busif, o_busif, tmp;
+	uint ratio;
+
+	if (!runtime)
+		return;
+
+	fin  = rsnd_src_get_in_rate(priv, io);
+	fout = rsnd_src_get_out_rate(priv, io);
+
+	/* 6 - 1/6 are very enough ratio for SRC_BSDSR */
+	if (fin == fout)
+		ratio = 0;
+	else if (fin > fout)
+		ratio = 100 * fin / fout;
+	else
+		ratio = 100 * fout / fin;
+
+	if (ratio > 600) {
+		dev_err(dev, "FSO/FSI ratio error\n");
+		return;
+	}
+
+	use_src = (fin != fout) | rsnd_src_sync_is_enabled(mod);
+
+	/*
+	 * SRC_ADINR
+	 */
+	adinr = rsnd_get_adinr_bit(mod, io) |
+		rsnd_runtime_channel_original(io);
+
+	/*
+	 * SRC_IFSCR / SRC_IFSVR
+	 */
+	ifscr = 0;
+	fsrate = 0;
+	if (use_src) {
+		u64 n;
+
+		ifscr = 1;
+		n = (u64)0x0400000 * fin;
+		do_div(n, fout);
+		fsrate = n;
+	}
+
+	/*
+	 * SRC_SRCCR / SRC_ROUTE_MODE0
+	 */
+	cr	= 0x00011110;
+	route	= 0x0;
+	if (use_src) {
+		route	= 0x1;
+
+		if (rsnd_src_sync_is_enabled(mod)) {
+			cr |= 0x1;
+			route |= rsnd_io_is_play(io) ?
+				(0x1 << 24) : (0x1 << 25);
+		}
+	}
+
+	/*
+	 * SRC_BSDSR / SRC_BSISR
+	 */
+	switch (rsnd_mod_id(mod)) {
+	case 5:
+	case 6:
+	case 7:
+	case 8:
+		bsdsr = 0x02400000; /* 6 - 1/6 */
+		bsisr = 0x00100060; /* 6 - 1/6 */
+		break;
+	default:
+		bsdsr = 0x01800000; /* 6 - 1/6 */
+		bsisr = 0x00100060 ;/* 6 - 1/6 */
+		break;
+	}
+
+	/* BUSIF_MODE */
+	tmp = rsnd_get_busif_shift(io, mod);
+	i_busif = ( is_play ? tmp : 0) | 1;
+	o_busif = (!is_play ? tmp : 0) | 1;
+
+	rsnd_mod_write(mod, SRC_ROUTE_MODE0, route);
+
+	rsnd_mod_write(mod, SRC_SRCIR, 1);	/* initialize */
+	rsnd_mod_write(mod, SRC_ADINR, adinr);
+	rsnd_mod_write(mod, SRC_IFSCR, ifscr);
+	rsnd_mod_write(mod, SRC_IFSVR, fsrate);
+	rsnd_mod_write(mod, SRC_SRCCR, cr);
+	rsnd_mod_write(mod, SRC_BSDSR, bsdsr);
+	rsnd_mod_write(mod, SRC_BSISR, bsisr);
+	rsnd_mod_write(mod, SRC_SRCIR, 0);	/* cancel initialize */
+
+	rsnd_mod_write(mod, SRC_I_BUSIF_MODE, i_busif);
+	rsnd_mod_write(mod, SRC_O_BUSIF_MODE, o_busif);
+
+	rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io));
+
+	rsnd_adg_set_src_timesel_gen2(mod, io, fin, fout);
+}
+
+static int rsnd_src_irq(struct rsnd_mod *mod,
+			struct rsnd_dai_stream *io,
+			struct rsnd_priv *priv,
+			int enable)
+{
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+	u32 sys_int_val, int_val, sys_int_mask;
+	int irq = src->irq;
+	int id = rsnd_mod_id(mod);
+
+	sys_int_val =
+	sys_int_mask = OUF_SRC(id);
+	int_val = 0x3300;
+
+	/*
+	 * IRQ is not supported on non-DT
+	 * see
+	 *	rsnd_src_probe_()
+	 */
+	if ((irq <= 0) || !enable) {
+		sys_int_val = 0;
+		int_val = 0;
+	}
+
+	/*
+	 * WORKAROUND
+	 *
+	 * ignore over flow error when rsnd_src_sync_is_enabled()
+	 */
+	if (rsnd_src_sync_is_enabled(mod))
+		sys_int_val = sys_int_val & 0xffff;
+
+	rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val);
+	rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val);
+	rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val);
+
+	return 0;
+}
+
+static void rsnd_src_status_clear(struct rsnd_mod *mod)
+{
+	u32 val = OUF_SRC(rsnd_mod_id(mod));
+
+	rsnd_mod_write(mod, SCU_SYS_STATUS0, val);
+	rsnd_mod_write(mod, SCU_SYS_STATUS1, val);
+}
+
+static bool rsnd_src_error_occurred(struct rsnd_mod *mod)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	u32 val0, val1;
+	u32 status0, status1;
+	bool ret = false;
+
+	val0 = val1 = OUF_SRC(rsnd_mod_id(mod));
+
+	/*
+	 * WORKAROUND
+	 *
+	 * ignore over flow error when rsnd_src_sync_is_enabled()
+	 */
+	if (rsnd_src_sync_is_enabled(mod))
+		val0 = val0 & 0xffff;
+
+	status0 = rsnd_mod_read(mod, SCU_SYS_STATUS0);
+	status1 = rsnd_mod_read(mod, SCU_SYS_STATUS1);
+	if ((status0 & val0) || (status1 & val1)) {
+		rsnd_dbg_irq_status(dev, "%s[%d] err status : 0x%08x, 0x%08x\n",
+			rsnd_mod_name(mod), rsnd_mod_id(mod),
+			status0, status1);
+
+		ret = true;
+	}
+
+	return ret;
+}
+
+static int rsnd_src_start(struct rsnd_mod *mod,
+			  struct rsnd_dai_stream *io,
+			  struct rsnd_priv *priv)
+{
+	u32 val;
+
+	/*
+	 * WORKAROUND
+	 *
+	 * Enable SRC output if you want to use sync convert together with DVC
+	 */
+	val = (rsnd_io_to_mod_dvc(io) && !rsnd_src_sync_is_enabled(mod)) ?
+		0x01 : 0x11;
+
+	rsnd_mod_write(mod, SRC_CTRL, val);
+
+	return 0;
+}
+
+static int rsnd_src_stop(struct rsnd_mod *mod,
+			 struct rsnd_dai_stream *io,
+			 struct rsnd_priv *priv)
+{
+	rsnd_mod_write(mod, SRC_CTRL, 0);
+
+	return 0;
+}
+
+static int rsnd_src_init(struct rsnd_mod *mod,
+			 struct rsnd_dai_stream *io,
+			 struct rsnd_priv *priv)
+{
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+
+	/* reset sync convert_rate */
+	src->sync.val = 0;
+
+	rsnd_mod_power_on(mod);
+
+	rsnd_src_activation(mod);
+
+	rsnd_src_set_convert_rate(io, mod);
+
+	rsnd_src_status_clear(mod);
+
+	return 0;
+}
+
+static int rsnd_src_quit(struct rsnd_mod *mod,
+			 struct rsnd_dai_stream *io,
+			 struct rsnd_priv *priv)
+{
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+
+	rsnd_src_halt(mod);
+
+	rsnd_mod_power_off(mod);
+
+	/* reset sync convert_rate */
+	src->sync.val = 0;
+
+	return 0;
+}
+
+static void __rsnd_src_interrupt(struct rsnd_mod *mod,
+				 struct rsnd_dai_stream *io)
+{
+	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+	bool stop = false;
+
+	spin_lock(&priv->lock);
+
+	/* ignore all cases if not working */
+	if (!rsnd_io_is_working(io))
+		goto rsnd_src_interrupt_out;
+
+	if (rsnd_src_error_occurred(mod))
+		stop = true;
+
+	rsnd_src_status_clear(mod);
+rsnd_src_interrupt_out:
+
+	spin_unlock(&priv->lock);
+
+	if (stop)
+		snd_pcm_stop_xrun(io->substream);
+}
+
+static irqreturn_t rsnd_src_interrupt(int irq, void *data)
+{
+	struct rsnd_mod *mod = data;
+
+	rsnd_mod_interrupt(mod, __rsnd_src_interrupt);
+
+	return IRQ_HANDLED;
+}
+
+static int rsnd_src_probe_(struct rsnd_mod *mod,
+			   struct rsnd_dai_stream *io,
+			   struct rsnd_priv *priv)
+{
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+	struct device *dev = rsnd_priv_to_dev(priv);
+	int irq = src->irq;
+	int ret;
+
+	if (irq > 0) {
+		/*
+		 * IRQ is not supported on non-DT
+		 * see
+		 *	rsnd_src_irq()
+		 */
+		ret = devm_request_irq(dev, irq,
+				       rsnd_src_interrupt,
+				       IRQF_SHARED,
+				       dev_name(dev), mod);
+		if (ret)
+			return ret;
+	}
+
+	ret = rsnd_dma_attach(io, mod, &src->dma);
+
+	return ret;
+}
+
+static int rsnd_src_pcm_new(struct rsnd_mod *mod,
+			    struct rsnd_dai_stream *io,
+			    struct snd_soc_pcm_runtime *rtd)
+{
+	struct rsnd_src *src = rsnd_mod_to_src(mod);
+	int ret;
+
+	/*
+	 * enable SRC sync convert if possible
+	 */
+
+	/*
+	 * It can't use SRC Synchronous convert
+	 * when Capture if it uses CMD
+	 */
+	if (rsnd_io_to_mod_cmd(io) && !rsnd_io_is_play(io))
+		return 0;
+
+	/*
+	 * enable sync convert
+	 */
+	ret = rsnd_kctrl_new_s(mod, io, rtd,
+			       rsnd_io_is_play(io) ?
+			       "SRC Out Rate Switch" :
+			       "SRC In Rate Switch",
+			       rsnd_kctrl_accept_anytime,
+			       rsnd_src_set_convert_rate,
+			       &src->sen, 1);
+	if (ret < 0)
+		return ret;
+
+	ret = rsnd_kctrl_new_s(mod, io, rtd,
+			       rsnd_io_is_play(io) ?
+			       "SRC Out Rate" :
+			       "SRC In Rate",
+			       rsnd_kctrl_accept_runtime,
+			       rsnd_src_set_convert_rate,
+			       &src->sync, 192000);
+
+	return ret;
+}
+
+static struct rsnd_mod_ops rsnd_src_ops = {
+	.name	= SRC_NAME,
+	.dma_req = rsnd_src_dma_req,
+	.probe	= rsnd_src_probe_,
+	.init	= rsnd_src_init,
+	.quit	= rsnd_src_quit,
+	.start	= rsnd_src_start,
+	.stop	= rsnd_src_stop,
+	.irq	= rsnd_src_irq,
+	.hw_params = rsnd_src_hw_params,
+	.pcm_new = rsnd_src_pcm_new,
+};
+
+struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id)
+{
+	if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv)))
+		id = 0;
+
+	return rsnd_mod_get(rsnd_src_get(priv, id));
+}
+
+int rsnd_src_probe(struct rsnd_priv *priv)
+{
+	struct device_node *node;
+	struct device_node *np;
+	struct device *dev = rsnd_priv_to_dev(priv);
+	struct rsnd_src *src;
+	struct clk *clk;
+	char name[RSND_SRC_NAME_SIZE];
+	int i, nr, ret;
+
+	/* This driver doesn't support Gen1 at this point */
+	if (rsnd_is_gen1(priv))
+		return 0;
+
+	node = rsnd_src_of_node(priv);
+	if (!node)
+		return 0; /* not used is not error */
+
+	nr = of_get_child_count(node);
+	if (!nr) {
+		ret = -EINVAL;
+		goto rsnd_src_probe_done;
+	}
+
+	src	= devm_kcalloc(dev, nr, sizeof(*src), GFP_KERNEL);
+	if (!src) {
+		ret = -ENOMEM;
+		goto rsnd_src_probe_done;
+	}
+
+	priv->src_nr	= nr;
+	priv->src	= src;
+
+	i = 0;
+	for_each_child_of_node(node, np) {
+		if (!of_device_is_available(np))
+			goto skip;
+
+		src = rsnd_src_get(priv, i);
+
+		snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d",
+			 SRC_NAME, i);
+
+		src->irq = irq_of_parse_and_map(np, 0);
+		if (!src->irq) {
+			ret = -EINVAL;
+			of_node_put(np);
+			goto rsnd_src_probe_done;
+		}
+
+		clk = devm_clk_get(dev, name);
+		if (IS_ERR(clk)) {
+			ret = PTR_ERR(clk);
+			of_node_put(np);
+			goto rsnd_src_probe_done;
+		}
+
+		ret = rsnd_mod_init(priv, rsnd_mod_get(src),
+				    &rsnd_src_ops, clk, rsnd_mod_get_status,
+				    RSND_MOD_SRC, i);
+		if (ret) {
+			of_node_put(np);
+			goto rsnd_src_probe_done;
+		}
+
+skip:
+		i++;
+	}
+
+	ret = 0;
+
+rsnd_src_probe_done:
+	of_node_put(node);
+
+	return ret;
+}
+
+void rsnd_src_remove(struct rsnd_priv *priv)
+{
+	struct rsnd_src *src;
+	int i;
+
+	for_each_rsnd_src(src, priv, i) {
+		rsnd_mod_quit(rsnd_mod_get(src));
+	}
+}