1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas R-Car SSIU/SSI support
5 // Copyright (C) 2013 Renesas Solutions Corp.
6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
9 // Kuninori Morimoto <morimoto.kuninori@renesas.com>
12 * you can enable below define if you don't need
13 * SSI interrupt status debug message when debugging
14 * see rsnd_print_irq_status()
16 * #define RSND_DEBUG_NO_IRQ_STATUS 1
19 #include <sound/simple_card_utils.h>
21 #include <linux/of_irq.h>
22 #include <linux/delay.h>
24 #define RSND_SSI_NAME_SIZE 16
29 #define FORCE (1u << 31) /* Fixed */
30 #define DMEN (1u << 28) /* DMA Enable */
31 #define UIEN (1u << 27) /* Underflow Interrupt Enable */
32 #define OIEN (1u << 26) /* Overflow Interrupt Enable */
33 #define IIEN (1u << 25) /* Idle Mode Interrupt Enable */
34 #define DIEN (1u << 24) /* Data Interrupt Enable */
35 #define CHNL_4 (1u << 22) /* Channels */
36 #define CHNL_6 (2u << 22) /* Channels */
37 #define CHNL_8 (3u << 22) /* Channels */
38 #define DWL_MASK (7u << 19) /* Data Word Length mask */
39 #define DWL_8 (0u << 19) /* Data Word Length */
40 #define DWL_16 (1u << 19) /* Data Word Length */
41 #define DWL_18 (2u << 19) /* Data Word Length */
42 #define DWL_20 (3u << 19) /* Data Word Length */
43 #define DWL_22 (4u << 19) /* Data Word Length */
44 #define DWL_24 (5u << 19) /* Data Word Length */
45 #define DWL_32 (6u << 19) /* Data Word Length */
50 #define SWL_16 (1 << 16) /* R/W System Word Length */
51 #define SWL_24 (2 << 16) /* R/W System Word Length */
52 #define SWL_32 (3 << 16) /* R/W System Word Length */
54 #define SCKD (1 << 15) /* Serial Bit Clock Direction */
55 #define SWSD (1 << 14) /* Serial WS Direction */
56 #define SCKP (1 << 13) /* Serial Bit Clock Polarity */
57 #define SWSP (1 << 12) /* Serial WS Polarity */
58 #define SDTA (1 << 10) /* Serial Data Alignment */
59 #define PDTA (1 << 9) /* Parallel Data Alignment */
60 #define DEL (1 << 8) /* Serial Data Delay */
61 #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */
62 #define TRMD (1 << 1) /* Transmit/Receive Mode Select */
63 #define EN (1 << 0) /* SSI Module Enable */
68 #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */
69 #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */
70 #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */
71 #define DIRQ (1 << 24) /* Data Interrupt Status Flag */
76 #define CONT (1 << 8) /* WS Continue Function */
77 #define WS_MODE (1 << 0) /* WS Mode */
79 #define SSI_NAME "ssi"
102 #define RSND_SSI_CLK_PIN_SHARE (1 << 0)
103 #define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */
104 #define RSND_SSI_PROBED (1 << 2)
106 #define for_each_rsnd_ssi(pos, priv, i) \
108 (i < rsnd_ssi_nr(priv)) && \
109 ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
112 #define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id)
113 #define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
114 #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
115 #define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io))
116 #define rsnd_ssi_is_multi_secondary(mod, io) \
117 (rsnd_ssi_multi_secondaries(io) & (1 << rsnd_mod_id(mod)))
118 #define rsnd_ssi_is_run_mods(mod, io) \
119 (rsnd_ssi_run_mods(io) & (1 << rsnd_mod_id(mod)))
120 #define rsnd_ssi_can_output_clk(mod) (!__rsnd_ssi_is_pin_sharing(mod))
122 int rsnd_ssi_use_busif(struct rsnd_dai_stream *io)
124 struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
125 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
128 if (!rsnd_ssi_is_dma_mode(mod))
131 if (!(rsnd_flags_has(ssi, RSND_SSI_NO_BUSIF)))
133 if (rsnd_io_to_mod_src(io))
139 static void rsnd_ssi_status_clear(struct rsnd_mod *mod)
141 rsnd_mod_write(mod, SSISR, 0);
144 static u32 rsnd_ssi_status_get(struct rsnd_mod *mod)
146 return rsnd_mod_read(mod, SSISR);
149 static void rsnd_ssi_status_check(struct rsnd_mod *mod,
152 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
153 struct device *dev = rsnd_priv_to_dev(priv);
157 for (i = 0; i < 1024; i++) {
158 status = rsnd_ssi_status_get(mod);
165 dev_warn(dev, "%s status check failed\n", rsnd_mod_name(mod));
168 static u32 rsnd_ssi_multi_secondaries(struct rsnd_dai_stream *io)
170 static const enum rsnd_mod_type types[] = {
178 for (i = 0; i < ARRAY_SIZE(types); i++) {
179 struct rsnd_mod *mod = rsnd_io_to_mod(io, types[i]);
184 mask |= 1 << rsnd_mod_id(mod);
190 static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io)
192 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
193 struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
196 mods = rsnd_ssi_multi_secondaries_runtime(io) |
197 1 << rsnd_mod_id(ssi_mod);
200 mods |= 1 << rsnd_mod_id(ssi_parent_mod);
205 u32 rsnd_ssi_multi_secondaries_runtime(struct rsnd_dai_stream *io)
207 if (rsnd_runtime_is_multi_ssi(io))
208 return rsnd_ssi_multi_secondaries(io);
213 static u32 rsnd_rdai_width_to_swl(struct rsnd_dai *rdai)
215 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
216 struct device *dev = rsnd_priv_to_dev(priv);
217 int width = rsnd_rdai_width_get(rdai);
220 case 32: return SWL_32;
221 case 24: return SWL_24;
222 case 16: return SWL_16;
225 dev_err(dev, "unsupported slot width value: %d\n", width);
229 unsigned int rsnd_ssi_clk_query(struct rsnd_dai *rdai,
230 int param1, int param2, int *idx)
232 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
233 static const int ssi_clk_mul_table[] = {
234 1, 2, 4, 8, 16, 6, 12,
237 unsigned int main_rate;
238 int width = rsnd_rdai_width_get(rdai);
240 for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
243 * It will set SSIWSR.CONT here, but SSICR.CKDV = 000
244 * with it is not allowed. (SSIWSR.WS_MODE with
245 * SSICR.CKDV = 000 is not allowed either).
246 * Skip it. See SSICR.CKDV
251 main_rate = width * param1 * param2 * ssi_clk_mul_table[j];
253 ret = rsnd_adg_clk_query(priv, main_rate);
266 static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
267 struct rsnd_dai_stream *io)
269 struct rsnd_priv *priv = rsnd_io_to_priv(io);
270 struct device *dev = rsnd_priv_to_dev(priv);
271 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
272 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
273 int chan = rsnd_runtime_channel_for_ssi(io);
275 unsigned int main_rate;
276 unsigned int rate = rsnd_io_is_play(io) ?
277 rsnd_src_get_out_rate(priv, io) :
278 rsnd_src_get_in_rate(priv, io);
280 if (!rsnd_rdai_is_clk_master(rdai))
283 if (!rsnd_ssi_can_output_clk(mod))
286 if (rsnd_ssi_is_multi_secondary(mod, io))
289 if (rsnd_runtime_is_tdm_split(io))
290 chan = rsnd_io_converted_chan(io);
292 chan = rsnd_channel_normalization(chan);
294 if (ssi->usrcnt > 0) {
295 if (ssi->rate != rate) {
296 dev_err(dev, "SSI parent/child should use same rate\n");
300 if (ssi->chan != chan) {
301 dev_err(dev, "SSI parent/child should use same chan\n");
309 main_rate = rsnd_ssi_clk_query(rdai, rate, chan, &idx);
313 ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
318 * SSI clock will be output contiguously
320 * This means, rsnd_ssi_master_clk_start()
321 * and rsnd_ssi_register_setup() are necessary
324 * SSICR : FORCE, SCKD, SWSD
327 ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) |
328 SCKD | SWSD | CKDV(idx);
333 dev_dbg(dev, "%s outputs %d chan %u Hz\n",
334 rsnd_mod_name(mod), chan, rate);
339 dev_err(dev, "unsupported clock rate\n");
343 static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
344 struct rsnd_dai_stream *io)
346 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
347 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
349 if (!rsnd_rdai_is_clk_master(rdai))
352 if (!rsnd_ssi_can_output_clk(mod))
362 rsnd_adg_ssi_clk_stop(mod);
365 static void rsnd_ssi_config_init(struct rsnd_mod *mod,
366 struct rsnd_dai_stream *io)
368 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
369 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
370 struct device *dev = rsnd_priv_to_dev(priv);
371 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
372 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
373 u32 cr_own = ssi->cr_own;
374 u32 cr_mode = ssi->cr_mode;
377 int is_tdm, is_tdm_split;
379 is_tdm = rsnd_runtime_is_tdm(io);
380 is_tdm_split = rsnd_runtime_is_tdm_split(io);
383 dev_dbg(dev, "TDM mode\n");
385 dev_dbg(dev, "TDM Split mode\n");
387 cr_own |= FORCE | rsnd_rdai_width_to_swl(rdai);
389 if (rdai->bit_clk_inv)
391 if (rdai->frm_clk_inv && !is_tdm)
393 if (rdai->data_alignment)
401 * rsnd_ssiu_init_gen2()
403 if (is_tdm || is_tdm_split) {
409 * We shouldn't exchange SWSP after running.
410 * This means, parent needs to care it.
412 if (rsnd_ssi_is_parent(mod, io))
415 if (rsnd_io_is_play(io))
419 width = snd_pcm_format_width(runtime->format);
422 * The SWL and DWL bits in SSICR should be fixed at 32-bit
423 * setting when TDM split mode.
425 * Operation :: TDM Format Split Function (TDM Split Mode)
445 if (rsnd_ssi_is_dma_mode(mod)) {
446 cr_mode = UIEN | OIEN | /* over/under run */
447 DMEN; /* DMA : enable DMA */
449 cr_mode = DIEN; /* PIO : enable Data interrupt */
453 ssi->cr_own = cr_own;
454 ssi->cr_mode = cr_mode;
458 static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
460 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
462 rsnd_mod_write(mod, SSIWSR, ssi->wsr);
463 rsnd_mod_write(mod, SSICR, ssi->cr_own |
470 * SSI mod common functions
472 static int rsnd_ssi_init(struct rsnd_mod *mod,
473 struct rsnd_dai_stream *io,
474 struct rsnd_priv *priv)
476 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
479 if (!rsnd_ssi_is_run_mods(mod, io))
482 ret = rsnd_ssi_master_clk_start(mod, io);
488 ret = rsnd_mod_power_on(mod);
492 rsnd_ssi_config_init(mod, io);
494 rsnd_ssi_register_setup(mod);
496 /* clear error status */
497 rsnd_ssi_status_clear(mod);
502 static int rsnd_ssi_quit(struct rsnd_mod *mod,
503 struct rsnd_dai_stream *io,
504 struct rsnd_priv *priv)
506 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
507 struct device *dev = rsnd_priv_to_dev(priv);
509 if (!rsnd_ssi_is_run_mods(mod, io))
513 dev_err(dev, "%s usrcnt error\n", rsnd_mod_name(mod));
517 rsnd_ssi_master_clk_stop(mod, io);
519 rsnd_mod_power_off(mod);
532 static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
533 struct rsnd_dai_stream *io,
534 struct snd_pcm_substream *substream,
535 struct snd_pcm_hw_params *params)
537 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
538 unsigned int fmt_width = snd_pcm_format_width(params_format(params));
540 if (fmt_width > rdai->chan_width) {
541 struct rsnd_priv *priv = rsnd_io_to_priv(io);
542 struct device *dev = rsnd_priv_to_dev(priv);
544 dev_err(dev, "invalid combination of slot-width and format-data-width\n");
551 static int rsnd_ssi_start(struct rsnd_mod *mod,
552 struct rsnd_dai_stream *io,
553 struct rsnd_priv *priv)
555 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
557 if (!rsnd_ssi_is_run_mods(mod, io))
561 * EN will be set via SSIU :: SSI_CONTROL
562 * if Multi channel mode
564 if (rsnd_ssi_multi_secondaries_runtime(io))
568 * EN is for data output.
569 * SSI parent EN is not needed.
571 if (rsnd_ssi_is_parent(mod, io))
576 rsnd_mod_write(mod, SSICR, ssi->cr_own |
584 static int rsnd_ssi_stop(struct rsnd_mod *mod,
585 struct rsnd_dai_stream *io,
586 struct rsnd_priv *priv)
588 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
591 if (!rsnd_ssi_is_run_mods(mod, io))
594 if (rsnd_ssi_is_parent(mod, io))
602 * Playback: Wait all data was sent
603 * Capture: It might not receave data. Do nothing
605 if (rsnd_io_is_play(io)) {
606 rsnd_mod_write(mod, SSICR, cr | ssi->cr_en);
607 rsnd_ssi_status_check(mod, DIRQ);
610 /* In multi-SSI mode, stop is performed by setting ssi0129 in
611 * SSI_CONTROL to 0 (in rsnd_ssio_stop_gen2). Do nothing here.
613 if (rsnd_ssi_multi_secondaries_runtime(io))
618 * and, wait idle state
620 rsnd_mod_write(mod, SSICR, cr); /* disabled all */
621 rsnd_ssi_status_check(mod, IIRQ);
628 static int rsnd_ssi_irq(struct rsnd_mod *mod,
629 struct rsnd_dai_stream *io,
630 struct rsnd_priv *priv,
634 int is_tdm, is_tdm_split;
635 int id = rsnd_mod_id(mod);
637 is_tdm = rsnd_runtime_is_tdm(io);
638 is_tdm_split = rsnd_runtime_is_tdm_split(io);
640 if (rsnd_is_gen1(priv))
643 if (rsnd_ssi_is_parent(mod, io))
646 if (!rsnd_ssi_is_run_mods(mod, io))
650 val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
652 if (is_tdm || is_tdm_split) {
665 rsnd_mod_write(mod, SSI_INT_ENABLE, val);
670 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
671 struct rsnd_dai_stream *io);
672 static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
673 struct rsnd_dai_stream *io)
675 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
676 struct device *dev = rsnd_priv_to_dev(priv);
677 int is_dma = rsnd_ssi_is_dma_mode(mod);
679 bool elapsed = false;
682 spin_lock(&priv->lock);
684 /* ignore all cases if not working */
685 if (!rsnd_io_is_working(io))
686 goto rsnd_ssi_interrupt_out;
688 status = rsnd_ssi_status_get(mod);
691 if (!is_dma && (status & DIRQ))
692 elapsed = rsnd_ssi_pio_interrupt(mod, io);
695 if (is_dma && (status & (UIRQ | OIRQ))) {
696 rsnd_print_irq_status(dev, "%s err status : 0x%08x\n",
697 rsnd_mod_name(mod), status);
702 stop |= rsnd_ssiu_busif_err_status_clear(mod);
704 rsnd_ssi_status_clear(mod);
705 rsnd_ssi_interrupt_out:
706 spin_unlock(&priv->lock);
709 rsnd_dai_period_elapsed(io);
712 snd_pcm_stop_xrun(io->substream);
716 static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
718 struct rsnd_mod *mod = data;
720 rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
725 static u32 *rsnd_ssi_get_status(struct rsnd_mod *mod,
726 struct rsnd_dai_stream *io,
727 enum rsnd_mod_type type)
730 * SSIP (= SSI parent) needs to be special, otherwise,
731 * 2nd SSI might doesn't start. see also rsnd_mod_call()
733 * We can't include parent SSI status on SSI, because we don't know
734 * how many SSI requests parent SSI. Thus, it is localed on "io" now.
737 * Capture : SSI1 (needs SSI0)
739 * 1) start Capture -> SSI0/SSI1 are started.
740 * 2) start Playback -> SSI0 doesn't work, because it is already
741 * marked as "started" on 1)
743 * OTOH, using each mod's status is good for MUX case.
744 * It doesn't need to start in 2nd start
746 * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
748 * IO-1: SRC1 -> CTU2 -+
750 * 1) start IO-0 -> start SSI0
751 * 2) start IO-1 -> SSI0 doesn't need to start, because it is
752 * already started on 1)
754 if (type == RSND_MOD_SSIP)
755 return &io->parent_ssi_status;
757 return rsnd_mod_get_status(mod, io, type);
763 static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
764 struct rsnd_dai_stream *io)
766 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
767 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
769 if (!__rsnd_ssi_is_pin_sharing(mod))
772 if (!rsnd_rdai_is_clk_master(rdai))
775 if (rsnd_ssi_is_multi_secondary(mod, io))
778 switch (rsnd_mod_id(mod)) {
782 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
785 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
788 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
793 static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
794 struct rsnd_dai_stream *io,
795 struct snd_soc_pcm_runtime *rtd)
798 * rsnd_rdai_is_clk_master() will be enabled after set_fmt,
799 * and, pcm_new will be called after it.
800 * This function reuse pcm_new at this point.
802 rsnd_ssi_parent_attach(mod, io);
807 static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
808 struct rsnd_dai_stream *io,
809 struct rsnd_priv *priv)
811 struct device *dev = rsnd_priv_to_dev(priv);
812 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
816 * SSIP/SSIU/IRQ are not needed on
817 * SSI Multi secondaries
819 if (rsnd_ssi_is_multi_secondary(mod, io))
823 * It can't judge ssi parent at this point
824 * see rsnd_ssi_pcm_new()
828 * SSI might be called again as PIO fallback
829 * It is easy to manual handling for IRQ request/free
831 * OTOH, this function might be called many times if platform is
832 * using MIX. It needs xxx_attach() many times on xxx_probe().
833 * Because of it, we can't control .probe/.remove calling count by
835 * But it don't need to call request_irq() many times.
836 * Let's control it by RSND_SSI_PROBED flag.
838 if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
839 ret = request_irq(ssi->irq,
844 rsnd_flags_set(ssi, RSND_SSI_PROBED);
850 static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
851 struct rsnd_dai_stream *io,
852 struct rsnd_priv *priv)
854 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
855 struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io);
857 /* Do nothing if non SSI (= SSI parent, multi SSI) mod */
858 if (pure_ssi_mod != mod)
861 /* PIO will request IRQ again */
862 if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
863 free_irq(ssi->irq, mod);
865 rsnd_flags_del(ssi, RSND_SSI_PROBED);
874 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
875 struct rsnd_dai_stream *io)
877 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
878 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
879 u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);
882 bool elapsed = false;
884 if (snd_pcm_format_width(runtime->format) == 24)
888 * 8/16/32 data can be assesse to TDR/RDR register
889 * directly as 32bit data
890 * see rsnd_ssi_init()
892 if (rsnd_io_is_play(io))
893 rsnd_mod_write(mod, SSITDR, (*buf) << shift);
895 *buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
897 byte_pos = ssi->byte_pos + sizeof(*buf);
899 if (byte_pos >= ssi->next_period_byte) {
900 int period_pos = byte_pos / ssi->byte_per_period;
902 if (period_pos >= runtime->periods) {
907 ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;
912 WRITE_ONCE(ssi->byte_pos, byte_pos);
917 static int rsnd_ssi_pio_init(struct rsnd_mod *mod,
918 struct rsnd_dai_stream *io,
919 struct rsnd_priv *priv)
921 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
922 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
924 if (!rsnd_ssi_is_parent(mod, io)) {
926 ssi->byte_per_period = runtime->period_size *
928 samples_to_bytes(runtime, 1);
929 ssi->next_period_byte = ssi->byte_per_period;
932 return rsnd_ssi_init(mod, io, priv);
935 static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod,
936 struct rsnd_dai_stream *io,
937 snd_pcm_uframes_t *pointer)
939 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
940 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
942 *pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));
947 static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
949 .probe = rsnd_ssi_common_probe,
950 .remove = rsnd_ssi_common_remove,
951 .init = rsnd_ssi_pio_init,
952 .quit = rsnd_ssi_quit,
953 .start = rsnd_ssi_start,
954 .stop = rsnd_ssi_stop,
956 .pointer = rsnd_ssi_pio_pointer,
957 .pcm_new = rsnd_ssi_pcm_new,
958 .hw_params = rsnd_ssi_hw_params,
959 .get_status = rsnd_ssi_get_status,
962 static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
963 struct rsnd_dai_stream *io,
964 struct rsnd_priv *priv)
969 * SSIP/SSIU/IRQ/DMA are not needed on
970 * SSI Multi secondaries
972 if (rsnd_ssi_is_multi_secondary(mod, io))
975 ret = rsnd_ssi_common_probe(mod, io, priv);
979 /* SSI probe might be called many times in MUX multi path */
980 ret = rsnd_dma_attach(io, mod, &io->dma);
985 static int rsnd_ssi_fallback(struct rsnd_mod *mod,
986 struct rsnd_dai_stream *io,
987 struct rsnd_priv *priv)
989 struct device *dev = rsnd_priv_to_dev(priv);
994 * SSI .probe might be called again.
996 * rsnd_rdai_continuance_probe()
998 mod->ops = &rsnd_ssi_pio_ops;
1000 dev_info(dev, "%s fallback to PIO mode\n", rsnd_mod_name(mod));
1005 static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
1006 struct rsnd_mod *mod)
1008 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
1009 int is_play = rsnd_io_is_play(io);
1013 * It should use "rcar_sound,ssiu" on DT.
1014 * But, we need to keep compatibility for old version.
1016 * If it has "rcar_sound.ssiu", it will be used.
1017 * If not, "rcar_sound.ssi" will be used.
1019 * rsnd_ssiu_dma_req()
1020 * rsnd_dma_of_path()
1023 if (rsnd_ssi_use_busif(io))
1024 name = is_play ? "rxu" : "txu";
1026 name = is_play ? "rx" : "tx";
1028 return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
1029 SSI_NAME, mod, name);
1032 #ifdef CONFIG_DEBUG_FS
1033 static void rsnd_ssi_debug_info(struct seq_file *m,
1034 struct rsnd_dai_stream *io,
1035 struct rsnd_mod *mod)
1037 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
1038 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
1040 seq_printf(m, "clock: %s\n", rsnd_rdai_is_clk_master(rdai) ?
1041 "provider" : "consumer");
1042 seq_printf(m, "bit_clk_inv: %d\n", rdai->bit_clk_inv);
1043 seq_printf(m, "frm_clk_inv: %d\n", rdai->frm_clk_inv);
1044 seq_printf(m, "pin share: %d\n", __rsnd_ssi_is_pin_sharing(mod));
1045 seq_printf(m, "can out clk: %d\n", rsnd_ssi_can_output_clk(mod));
1046 seq_printf(m, "multi secondary: %d\n", rsnd_ssi_is_multi_secondary(mod, io));
1047 seq_printf(m, "tdm: %d, %d\n", rsnd_runtime_is_tdm(io),
1048 rsnd_runtime_is_tdm_split(io));
1049 seq_printf(m, "chan: %d\n", ssi->chan);
1050 seq_printf(m, "user: %d\n", ssi->usrcnt);
1052 rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SSI,
1053 rsnd_mod_id(mod) * 0x40, 0x40);
1055 #define DEBUG_INFO .debug_info = rsnd_ssi_debug_info
1060 static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
1062 .dma_req = rsnd_ssi_dma_req,
1063 .probe = rsnd_ssi_dma_probe,
1064 .remove = rsnd_ssi_common_remove,
1065 .init = rsnd_ssi_init,
1066 .quit = rsnd_ssi_quit,
1067 .start = rsnd_ssi_start,
1068 .stop = rsnd_ssi_stop,
1069 .irq = rsnd_ssi_irq,
1070 .pcm_new = rsnd_ssi_pcm_new,
1071 .fallback = rsnd_ssi_fallback,
1072 .hw_params = rsnd_ssi_hw_params,
1073 .get_status = rsnd_ssi_get_status,
1077 int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
1079 return mod->ops == &rsnd_ssi_dma_ops;
1085 static void rsnd_ssi_connect(struct rsnd_mod *mod,
1086 struct rsnd_dai_stream *io)
1088 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
1089 static const enum rsnd_mod_type types[] = {
1095 enum rsnd_mod_type type;
1098 /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */
1099 for (i = 0; i < ARRAY_SIZE(types); i++) {
1101 if (!rsnd_io_to_mod(io, type)) {
1102 rsnd_dai_connect(mod, io, type);
1103 rsnd_rdai_channels_set(rdai, (i + 1) * 2);
1104 rsnd_rdai_ssi_lane_set(rdai, (i + 1));
1110 void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
1111 struct device_node *playback,
1112 struct device_node *capture)
1114 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1115 struct device *dev = rsnd_priv_to_dev(priv);
1116 struct device_node *node;
1117 struct device_node *np;
1120 node = rsnd_ssi_of_node(priv);
1125 for_each_child_of_node(node, np) {
1126 struct rsnd_mod *mod;
1128 i = rsnd_node_fixed_index(dev, np, SSI_NAME, i);
1134 mod = rsnd_ssi_mod_get(priv, i);
1137 rsnd_ssi_connect(mod, &rdai->playback);
1139 rsnd_ssi_connect(mod, &rdai->capture);
1146 struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
1148 if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
1151 return rsnd_mod_get(rsnd_ssi_get(priv, id));
1154 int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
1159 return !!(rsnd_flags_has(rsnd_mod_to_ssi(mod), RSND_SSI_CLK_PIN_SHARE));
1162 int rsnd_ssi_probe(struct rsnd_priv *priv)
1164 struct device_node *node;
1165 struct device_node *np;
1166 struct device *dev = rsnd_priv_to_dev(priv);
1167 struct rsnd_mod_ops *ops;
1169 struct rsnd_ssi *ssi;
1170 char name[RSND_SSI_NAME_SIZE];
1173 node = rsnd_ssi_of_node(priv);
1177 nr = rsnd_node_count(priv, node, SSI_NAME);
1180 goto rsnd_ssi_probe_done;
1183 ssi = devm_kcalloc(dev, nr, sizeof(*ssi), GFP_KERNEL);
1186 goto rsnd_ssi_probe_done;
1193 for_each_child_of_node(node, np) {
1194 if (!of_device_is_available(np))
1197 i = rsnd_node_fixed_index(dev, np, SSI_NAME, i);
1201 goto rsnd_ssi_probe_done;
1204 ssi = rsnd_ssi_get(priv, i);
1206 snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
1209 clk = devm_clk_get(dev, name);
1213 goto rsnd_ssi_probe_done;
1216 if (of_property_read_bool(np, "shared-pin"))
1217 rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
1219 if (of_property_read_bool(np, "no-busif"))
1220 rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF);
1222 ssi->irq = irq_of_parse_and_map(np, 0);
1226 goto rsnd_ssi_probe_done;
1229 if (of_property_read_bool(np, "pio-transfer"))
1230 ops = &rsnd_ssi_pio_ops;
1232 ops = &rsnd_ssi_dma_ops;
1234 ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
1238 goto rsnd_ssi_probe_done;
1246 rsnd_ssi_probe_done:
1252 void rsnd_ssi_remove(struct rsnd_priv *priv)
1254 struct rsnd_ssi *ssi;
1257 for_each_rsnd_ssi(ssi, priv, i) {
1258 rsnd_mod_quit(rsnd_mod_get(ssi));