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_dbg_irq_status()
16 * #define RSND_DEBUG_NO_IRQ_STATUS 1
19 #include <sound/simple_card_utils.h>
20 #include <linux/delay.h>
22 #define RSND_SSI_NAME_SIZE 16
27 #define FORCE (1 << 31) /* Fixed */
28 #define DMEN (1 << 28) /* DMA Enable */
29 #define UIEN (1 << 27) /* Underflow Interrupt Enable */
30 #define OIEN (1 << 26) /* Overflow Interrupt Enable */
31 #define IIEN (1 << 25) /* Idle Mode Interrupt Enable */
32 #define DIEN (1 << 24) /* Data Interrupt Enable */
33 #define CHNL_4 (1 << 22) /* Channels */
34 #define CHNL_6 (2 << 22) /* Channels */
35 #define CHNL_8 (3 << 22) /* Channels */
36 #define DWL_MASK (7 << 19) /* Data Word Length mask */
37 #define DWL_8 (0 << 19) /* Data Word Length */
38 #define DWL_16 (1 << 19) /* Data Word Length */
39 #define DWL_18 (2 << 19) /* Data Word Length */
40 #define DWL_20 (3 << 19) /* Data Word Length */
41 #define DWL_22 (4 << 19) /* Data Word Length */
42 #define DWL_24 (5 << 19) /* Data Word Length */
43 #define DWL_32 (6 << 19) /* Data Word Length */
48 #define SWL_16 (1 << 16) /* R/W System Word Length */
49 #define SWL_24 (2 << 16) /* R/W System Word Length */
50 #define SWL_32 (3 << 16) /* R/W System Word Length */
52 #define SCKD (1 << 15) /* Serial Bit Clock Direction */
53 #define SWSD (1 << 14) /* Serial WS Direction */
54 #define SCKP (1 << 13) /* Serial Bit Clock Polarity */
55 #define SWSP (1 << 12) /* Serial WS Polarity */
56 #define SDTA (1 << 10) /* Serial Data Alignment */
57 #define PDTA (1 << 9) /* Parallel Data Alignment */
58 #define DEL (1 << 8) /* Serial Data Delay */
59 #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */
60 #define TRMD (1 << 1) /* Transmit/Receive Mode Select */
61 #define EN (1 << 0) /* SSI Module Enable */
66 #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */
67 #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */
68 #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */
69 #define DIRQ (1 << 24) /* Data Interrupt Status Flag */
74 #define CONT (1 << 8) /* WS Continue Function */
75 #define WS_MODE (1 << 0) /* WS Mode */
77 #define SSI_NAME "ssi"
100 #define RSND_SSI_CLK_PIN_SHARE (1 << 0)
101 #define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */
102 #define RSND_SSI_PROBED (1 << 2)
104 #define for_each_rsnd_ssi(pos, priv, i) \
106 (i < rsnd_ssi_nr(priv)) && \
107 ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
110 #define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id)
111 #define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
112 #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
113 #define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io))
114 #define rsnd_ssi_is_multi_slave(mod, io) \
115 (rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod)))
116 #define rsnd_ssi_is_run_mods(mod, io) \
117 (rsnd_ssi_run_mods(io) & (1 << rsnd_mod_id(mod)))
118 #define rsnd_ssi_can_output_clk(mod) (!__rsnd_ssi_is_pin_sharing(mod))
120 static int rsnd_ssi_is_dma_mode(struct rsnd_mod *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_slaves(struct rsnd_dai_stream *io)
170 struct rsnd_mod *mod;
171 enum rsnd_mod_type types[] = {
179 for (i = 0; i < ARRAY_SIZE(types); i++) {
180 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_slaves_runtime(io) |
197 1 << rsnd_mod_id(ssi_mod);
200 mods |= 1 << rsnd_mod_id(ssi_parent_mod);
205 u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io)
207 if (rsnd_runtime_is_multi_ssi(io))
208 return rsnd_ssi_multi_slaves(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 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_slave(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");
308 main_rate = rsnd_ssi_clk_query(rdai, rate, chan, &idx);
310 dev_err(dev, "unsupported clock rate\n");
314 ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
319 * SSI clock will be output contiguously
321 * This means, rsnd_ssi_master_clk_start()
322 * and rsnd_ssi_register_setup() are necessary
325 * SSICR : FORCE, SCKD, SWSD
328 ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) |
329 SCKD | SWSD | CKDV(idx);
334 dev_dbg(dev, "%s outputs %d chan %u Hz\n",
335 rsnd_mod_name(mod), chan, rate);
340 static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
341 struct rsnd_dai_stream *io)
343 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
344 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
346 if (!rsnd_rdai_is_clk_master(rdai))
349 if (!rsnd_ssi_can_output_clk(mod))
359 rsnd_adg_ssi_clk_stop(mod);
362 static void rsnd_ssi_config_init(struct rsnd_mod *mod,
363 struct rsnd_dai_stream *io)
365 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
366 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
367 struct device *dev = rsnd_priv_to_dev(priv);
368 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
369 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
370 u32 cr_own = ssi->cr_own;
371 u32 cr_mode = ssi->cr_mode;
374 int is_tdm, is_tdm_split;
376 is_tdm = rsnd_runtime_is_tdm(io);
377 is_tdm_split = rsnd_runtime_is_tdm_split(io);
380 dev_dbg(dev, "TDM mode\n");
382 dev_dbg(dev, "TDM Split mode\n");
384 cr_own |= FORCE | rsnd_rdai_width_to_swl(rdai);
386 if (rdai->bit_clk_inv)
388 if (rdai->frm_clk_inv && !is_tdm)
390 if (rdai->data_alignment)
398 * rsnd_ssiu_init_gen2()
401 if (is_tdm || is_tdm_split) {
407 * We shouldn't exchange SWSP after running.
408 * This means, parent needs to care it.
410 if (rsnd_ssi_is_parent(mod, io))
413 if (rsnd_io_is_play(io))
417 width = snd_pcm_format_width(runtime->format);
420 * The SWL and DWL bits in SSICR should be fixed at 32-bit
421 * setting when TDM split mode.
423 * Operation :: TDM Format Split Function (TDM Split Mode)
443 if (rsnd_ssi_is_dma_mode(mod)) {
444 cr_mode = UIEN | OIEN | /* over/under run */
445 DMEN; /* DMA : enable DMA */
447 cr_mode = DIEN; /* PIO : enable Data interrupt */
451 ssi->cr_own = cr_own;
452 ssi->cr_mode = cr_mode;
456 static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
458 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
460 rsnd_mod_write(mod, SSIWSR, ssi->wsr);
461 rsnd_mod_write(mod, SSICR, ssi->cr_own |
468 * SSI mod common functions
470 static int rsnd_ssi_init(struct rsnd_mod *mod,
471 struct rsnd_dai_stream *io,
472 struct rsnd_priv *priv)
474 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
476 if (!rsnd_ssi_is_run_mods(mod, io))
481 rsnd_mod_power_on(mod);
483 rsnd_ssi_config_init(mod, io);
485 rsnd_ssi_register_setup(mod);
487 /* clear error status */
488 rsnd_ssi_status_clear(mod);
493 static int rsnd_ssi_quit(struct rsnd_mod *mod,
494 struct rsnd_dai_stream *io,
495 struct rsnd_priv *priv)
497 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
498 struct device *dev = rsnd_priv_to_dev(priv);
500 if (!rsnd_ssi_is_run_mods(mod, io))
504 dev_err(dev, "%s usrcnt error\n", rsnd_mod_name(mod));
508 rsnd_ssi_master_clk_stop(mod, io);
510 rsnd_mod_power_off(mod);
523 static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
524 struct rsnd_dai_stream *io,
525 struct snd_pcm_substream *substream,
526 struct snd_pcm_hw_params *params)
528 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
529 unsigned int fmt_width = snd_pcm_format_width(params_format(params));
531 if (fmt_width > rdai->chan_width) {
532 struct rsnd_priv *priv = rsnd_io_to_priv(io);
533 struct device *dev = rsnd_priv_to_dev(priv);
535 dev_err(dev, "invalid combination of slot-width and format-data-width\n");
542 static int rsnd_ssi_start(struct rsnd_mod *mod,
543 struct rsnd_dai_stream *io,
544 struct rsnd_priv *priv)
546 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
548 if (!rsnd_ssi_is_run_mods(mod, io))
552 * EN will be set via SSIU :: SSI_CONTROL
553 * if Multi channel mode
555 if (rsnd_ssi_multi_slaves_runtime(io))
559 * EN is for data output.
560 * SSI parent EN is not needed.
562 if (rsnd_ssi_is_parent(mod, io))
567 rsnd_mod_write(mod, SSICR, ssi->cr_own |
575 static int rsnd_ssi_stop(struct rsnd_mod *mod,
576 struct rsnd_dai_stream *io,
577 struct rsnd_priv *priv)
579 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
582 if (!rsnd_ssi_is_run_mods(mod, io))
585 if (rsnd_ssi_is_parent(mod, io))
593 * Playback: Wait all data was sent
594 * Capture: It might not receave data. Do nothing
596 if (rsnd_io_is_play(io)) {
597 rsnd_mod_write(mod, SSICR, cr | EN);
598 rsnd_ssi_status_check(mod, DIRQ);
603 * and, wait idle state
605 rsnd_mod_write(mod, SSICR, cr); /* disabled all */
606 rsnd_ssi_status_check(mod, IIRQ);
613 static int rsnd_ssi_irq(struct rsnd_mod *mod,
614 struct rsnd_dai_stream *io,
615 struct rsnd_priv *priv,
620 if (rsnd_is_gen1(priv))
623 if (rsnd_ssi_is_parent(mod, io))
626 if (!rsnd_ssi_is_run_mods(mod, io))
630 val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
632 rsnd_mod_write(mod, SSI_INT_ENABLE, val);
637 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
638 struct rsnd_dai_stream *io);
639 static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
640 struct rsnd_dai_stream *io)
642 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
643 struct device *dev = rsnd_priv_to_dev(priv);
644 int is_dma = rsnd_ssi_is_dma_mode(mod);
646 bool elapsed = false;
649 spin_lock(&priv->lock);
651 /* ignore all cases if not working */
652 if (!rsnd_io_is_working(io))
653 goto rsnd_ssi_interrupt_out;
655 status = rsnd_ssi_status_get(mod);
658 if (!is_dma && (status & DIRQ))
659 elapsed = rsnd_ssi_pio_interrupt(mod, io);
662 if (is_dma && (status & (UIRQ | OIRQ))) {
663 rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n",
664 rsnd_mod_name(mod), status);
669 rsnd_ssi_status_clear(mod);
670 rsnd_ssi_interrupt_out:
671 spin_unlock(&priv->lock);
674 rsnd_dai_period_elapsed(io);
677 snd_pcm_stop_xrun(io->substream);
681 static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
683 struct rsnd_mod *mod = data;
685 rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
690 static u32 *rsnd_ssi_get_status(struct rsnd_mod *mod,
691 struct rsnd_dai_stream *io,
692 enum rsnd_mod_type type)
695 * SSIP (= SSI parent) needs to be special, otherwise,
696 * 2nd SSI might doesn't start. see also rsnd_mod_call()
698 * We can't include parent SSI status on SSI, because we don't know
699 * how many SSI requests parent SSI. Thus, it is localed on "io" now.
702 * Capture : SSI1 (needs SSI0)
704 * 1) start Capture -> SSI0/SSI1 are started.
705 * 2) start Playback -> SSI0 doesn't work, because it is already
706 * marked as "started" on 1)
708 * OTOH, using each mod's status is good for MUX case.
709 * It doesn't need to start in 2nd start
711 * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
713 * IO-1: SRC1 -> CTU2 -+
715 * 1) start IO-0 -> start SSI0
716 * 2) start IO-1 -> SSI0 doesn't need to start, because it is
717 * already started on 1)
719 if (type == RSND_MOD_SSIP)
720 return &io->parent_ssi_status;
722 return rsnd_mod_get_status(mod, io, type);
728 static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
729 struct rsnd_dai_stream *io)
731 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
732 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
734 if (!__rsnd_ssi_is_pin_sharing(mod))
737 if (!rsnd_rdai_is_clk_master(rdai))
740 switch (rsnd_mod_id(mod)) {
744 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
747 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
750 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
755 static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
756 struct rsnd_dai_stream *io,
757 struct snd_soc_pcm_runtime *rtd)
760 * rsnd_rdai_is_clk_master() will be enabled after set_fmt,
761 * and, pcm_new will be called after it.
762 * This function reuse pcm_new at this point.
764 rsnd_ssi_parent_attach(mod, io);
769 static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
770 struct rsnd_dai_stream *io,
771 struct rsnd_priv *priv)
773 struct device *dev = rsnd_priv_to_dev(priv);
774 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
778 * SSIP/SSIU/IRQ are not needed on
781 if (rsnd_ssi_is_multi_slave(mod, io))
785 * It can't judge ssi parent at this point
786 * see rsnd_ssi_pcm_new()
790 * SSI might be called again as PIO fallback
791 * It is easy to manual handling for IRQ request/free
793 * OTOH, this function might be called many times if platform is
794 * using MIX. It needs xxx_attach() many times on xxx_probe().
795 * Because of it, we can't control .probe/.remove calling count by
797 * But it don't need to call request_irq() many times.
798 * Let's control it by RSND_SSI_PROBED flag.
800 if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
801 ret = request_irq(ssi->irq,
806 rsnd_flags_set(ssi, RSND_SSI_PROBED);
812 static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
813 struct rsnd_dai_stream *io,
814 struct rsnd_priv *priv)
816 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
817 struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io);
819 /* Do nothing if non SSI (= SSI parent, multi SSI) mod */
820 if (pure_ssi_mod != mod)
823 /* PIO will request IRQ again */
824 if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
825 free_irq(ssi->irq, mod);
827 rsnd_flags_del(ssi, RSND_SSI_PROBED);
836 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
837 struct rsnd_dai_stream *io)
839 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
840 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
841 u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);
844 bool elapsed = false;
846 if (snd_pcm_format_width(runtime->format) == 24)
850 * 8/16/32 data can be assesse to TDR/RDR register
851 * directly as 32bit data
852 * see rsnd_ssi_init()
854 if (rsnd_io_is_play(io))
855 rsnd_mod_write(mod, SSITDR, (*buf) << shift);
857 *buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
859 byte_pos = ssi->byte_pos + sizeof(*buf);
861 if (byte_pos >= ssi->next_period_byte) {
862 int period_pos = byte_pos / ssi->byte_per_period;
864 if (period_pos >= runtime->periods) {
869 ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;
874 WRITE_ONCE(ssi->byte_pos, byte_pos);
879 static int rsnd_ssi_pio_init(struct rsnd_mod *mod,
880 struct rsnd_dai_stream *io,
881 struct rsnd_priv *priv)
883 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
884 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
886 if (!rsnd_ssi_is_parent(mod, io)) {
888 ssi->byte_per_period = runtime->period_size *
890 samples_to_bytes(runtime, 1);
891 ssi->next_period_byte = ssi->byte_per_period;
894 return rsnd_ssi_init(mod, io, priv);
897 static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod,
898 struct rsnd_dai_stream *io,
899 snd_pcm_uframes_t *pointer)
901 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
902 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
904 *pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));
909 static int rsnd_ssi_prepare(struct rsnd_mod *mod,
910 struct rsnd_dai_stream *io,
911 struct rsnd_priv *priv)
913 return rsnd_ssi_master_clk_start(mod, io);
916 static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
918 .probe = rsnd_ssi_common_probe,
919 .remove = rsnd_ssi_common_remove,
920 .init = rsnd_ssi_pio_init,
921 .quit = rsnd_ssi_quit,
922 .start = rsnd_ssi_start,
923 .stop = rsnd_ssi_stop,
925 .pointer = rsnd_ssi_pio_pointer,
926 .pcm_new = rsnd_ssi_pcm_new,
927 .hw_params = rsnd_ssi_hw_params,
928 .prepare = rsnd_ssi_prepare,
929 .get_status = rsnd_ssi_get_status,
932 static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
933 struct rsnd_dai_stream *io,
934 struct rsnd_priv *priv)
939 * SSIP/SSIU/IRQ/DMA are not needed on
942 if (rsnd_ssi_is_multi_slave(mod, io))
945 ret = rsnd_ssi_common_probe(mod, io, priv);
949 /* SSI probe might be called many times in MUX multi path */
950 ret = rsnd_dma_attach(io, mod, &io->dma);
955 static int rsnd_ssi_fallback(struct rsnd_mod *mod,
956 struct rsnd_dai_stream *io,
957 struct rsnd_priv *priv)
959 struct device *dev = rsnd_priv_to_dev(priv);
964 * SSI .probe might be called again.
966 * rsnd_rdai_continuance_probe()
968 mod->ops = &rsnd_ssi_pio_ops;
970 dev_info(dev, "%s fallback to PIO mode\n", rsnd_mod_name(mod));
975 static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
976 struct rsnd_mod *mod)
978 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
979 int is_play = rsnd_io_is_play(io);
983 * It should use "rcar_sound,ssiu" on DT.
984 * But, we need to keep compatibility for old version.
986 * If it has "rcar_sound.ssiu", it will be used.
987 * If not, "rcar_sound.ssi" will be used.
989 * rsnd_ssiu_dma_req()
993 if (rsnd_ssi_use_busif(io))
994 name = is_play ? "rxu" : "txu";
996 name = is_play ? "rx" : "tx";
998 return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
1002 static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
1004 .dma_req = rsnd_ssi_dma_req,
1005 .probe = rsnd_ssi_dma_probe,
1006 .remove = rsnd_ssi_common_remove,
1007 .init = rsnd_ssi_init,
1008 .quit = rsnd_ssi_quit,
1009 .start = rsnd_ssi_start,
1010 .stop = rsnd_ssi_stop,
1011 .irq = rsnd_ssi_irq,
1012 .pcm_new = rsnd_ssi_pcm_new,
1013 .fallback = rsnd_ssi_fallback,
1014 .hw_params = rsnd_ssi_hw_params,
1015 .prepare = rsnd_ssi_prepare,
1016 .get_status = rsnd_ssi_get_status,
1019 static int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
1021 return mod->ops == &rsnd_ssi_dma_ops;
1027 static void rsnd_ssi_connect(struct rsnd_mod *mod,
1028 struct rsnd_dai_stream *io)
1030 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
1031 enum rsnd_mod_type types[] = {
1037 enum rsnd_mod_type type;
1040 /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */
1041 for (i = 0; i < ARRAY_SIZE(types); i++) {
1043 if (!rsnd_io_to_mod(io, type)) {
1044 rsnd_dai_connect(mod, io, type);
1045 rsnd_rdai_channels_set(rdai, (i + 1) * 2);
1046 rsnd_rdai_ssi_lane_set(rdai, (i + 1));
1052 void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
1053 struct device_node *playback,
1054 struct device_node *capture)
1056 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1057 struct device_node *node;
1058 struct device_node *np;
1059 struct rsnd_mod *mod;
1062 node = rsnd_ssi_of_node(priv);
1067 for_each_child_of_node(node, np) {
1068 mod = rsnd_ssi_mod_get(priv, i);
1070 rsnd_ssi_connect(mod, &rdai->playback);
1072 rsnd_ssi_connect(mod, &rdai->capture);
1079 struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
1081 if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
1084 return rsnd_mod_get(rsnd_ssi_get(priv, id));
1087 int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
1092 return !!(rsnd_flags_has(rsnd_mod_to_ssi(mod), RSND_SSI_CLK_PIN_SHARE));
1095 int rsnd_ssi_probe(struct rsnd_priv *priv)
1097 struct device_node *node;
1098 struct device_node *np;
1099 struct device *dev = rsnd_priv_to_dev(priv);
1100 struct rsnd_mod_ops *ops;
1102 struct rsnd_ssi *ssi;
1103 char name[RSND_SSI_NAME_SIZE];
1106 node = rsnd_ssi_of_node(priv);
1110 nr = of_get_child_count(node);
1113 goto rsnd_ssi_probe_done;
1116 ssi = devm_kcalloc(dev, nr, sizeof(*ssi), GFP_KERNEL);
1119 goto rsnd_ssi_probe_done;
1126 for_each_child_of_node(node, np) {
1127 if (!of_device_is_available(np))
1130 ssi = rsnd_ssi_get(priv, i);
1132 snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
1135 clk = devm_clk_get(dev, name);
1139 goto rsnd_ssi_probe_done;
1142 if (of_get_property(np, "shared-pin", NULL))
1143 rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
1145 if (of_get_property(np, "no-busif", NULL))
1146 rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF);
1148 ssi->irq = irq_of_parse_and_map(np, 0);
1152 goto rsnd_ssi_probe_done;
1155 if (of_property_read_bool(np, "pio-transfer"))
1156 ops = &rsnd_ssi_pio_ops;
1158 ops = &rsnd_ssi_dma_ops;
1160 ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
1164 goto rsnd_ssi_probe_done;
1172 rsnd_ssi_probe_done:
1178 void rsnd_ssi_remove(struct rsnd_priv *priv)
1180 struct rsnd_ssi *ssi;
1183 for_each_rsnd_ssi(ssi, priv, i) {
1184 rsnd_mod_quit(rsnd_mod_get(ssi));