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-rw-r--r--sound/soc/sh/rcar/src.c635
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));
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 11:00:34 +0000