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 | ssi->cr_en);
598 rsnd_ssi_status_check(mod, DIRQ);
601 /* In multi-SSI mode, stop is performed by setting ssi0129 in
602 * SSI_CONTROL to 0 (in rsnd_ssio_stop_gen2). Do nothing here.
604 if (rsnd_ssi_multi_slaves_runtime(io))
609 * and, wait idle state
611 rsnd_mod_write(mod, SSICR, cr); /* disabled all */
612 rsnd_ssi_status_check(mod, IIRQ);
619 static int rsnd_ssi_irq(struct rsnd_mod *mod,
620 struct rsnd_dai_stream *io,
621 struct rsnd_priv *priv,
626 if (rsnd_is_gen1(priv))
629 if (rsnd_ssi_is_parent(mod, io))
632 if (!rsnd_ssi_is_run_mods(mod, io))
636 val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
638 rsnd_mod_write(mod, SSI_INT_ENABLE, val);
643 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
644 struct rsnd_dai_stream *io);
645 static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
646 struct rsnd_dai_stream *io)
648 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
649 struct device *dev = rsnd_priv_to_dev(priv);
650 int is_dma = rsnd_ssi_is_dma_mode(mod);
652 bool elapsed = false;
655 spin_lock(&priv->lock);
657 /* ignore all cases if not working */
658 if (!rsnd_io_is_working(io))
659 goto rsnd_ssi_interrupt_out;
661 status = rsnd_ssi_status_get(mod);
664 if (!is_dma && (status & DIRQ))
665 elapsed = rsnd_ssi_pio_interrupt(mod, io);
668 if (is_dma && (status & (UIRQ | OIRQ))) {
669 rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n",
670 rsnd_mod_name(mod), status);
675 rsnd_ssi_status_clear(mod);
676 rsnd_ssi_interrupt_out:
677 spin_unlock(&priv->lock);
680 rsnd_dai_period_elapsed(io);
683 snd_pcm_stop_xrun(io->substream);
687 static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
689 struct rsnd_mod *mod = data;
691 rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
696 static u32 *rsnd_ssi_get_status(struct rsnd_mod *mod,
697 struct rsnd_dai_stream *io,
698 enum rsnd_mod_type type)
701 * SSIP (= SSI parent) needs to be special, otherwise,
702 * 2nd SSI might doesn't start. see also rsnd_mod_call()
704 * We can't include parent SSI status on SSI, because we don't know
705 * how many SSI requests parent SSI. Thus, it is localed on "io" now.
708 * Capture : SSI1 (needs SSI0)
710 * 1) start Capture -> SSI0/SSI1 are started.
711 * 2) start Playback -> SSI0 doesn't work, because it is already
712 * marked as "started" on 1)
714 * OTOH, using each mod's status is good for MUX case.
715 * It doesn't need to start in 2nd start
717 * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
719 * IO-1: SRC1 -> CTU2 -+
721 * 1) start IO-0 -> start SSI0
722 * 2) start IO-1 -> SSI0 doesn't need to start, because it is
723 * already started on 1)
725 if (type == RSND_MOD_SSIP)
726 return &io->parent_ssi_status;
728 return rsnd_mod_get_status(mod, io, type);
734 static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
735 struct rsnd_dai_stream *io)
737 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
738 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
740 if (!__rsnd_ssi_is_pin_sharing(mod))
743 if (!rsnd_rdai_is_clk_master(rdai))
746 if (rsnd_ssi_is_multi_slave(mod, io))
749 switch (rsnd_mod_id(mod)) {
753 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
756 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
759 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
764 static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
765 struct rsnd_dai_stream *io,
766 struct snd_soc_pcm_runtime *rtd)
769 * rsnd_rdai_is_clk_master() will be enabled after set_fmt,
770 * and, pcm_new will be called after it.
771 * This function reuse pcm_new at this point.
773 rsnd_ssi_parent_attach(mod, io);
778 static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
779 struct rsnd_dai_stream *io,
780 struct rsnd_priv *priv)
782 struct device *dev = rsnd_priv_to_dev(priv);
783 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
787 * SSIP/SSIU/IRQ are not needed on
790 if (rsnd_ssi_is_multi_slave(mod, io))
794 * It can't judge ssi parent at this point
795 * see rsnd_ssi_pcm_new()
799 * SSI might be called again as PIO fallback
800 * It is easy to manual handling for IRQ request/free
802 * OTOH, this function might be called many times if platform is
803 * using MIX. It needs xxx_attach() many times on xxx_probe().
804 * Because of it, we can't control .probe/.remove calling count by
806 * But it don't need to call request_irq() many times.
807 * Let's control it by RSND_SSI_PROBED flag.
809 if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
810 ret = request_irq(ssi->irq,
815 rsnd_flags_set(ssi, RSND_SSI_PROBED);
821 static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
822 struct rsnd_dai_stream *io,
823 struct rsnd_priv *priv)
825 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
826 struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io);
828 /* Do nothing if non SSI (= SSI parent, multi SSI) mod */
829 if (pure_ssi_mod != mod)
832 /* PIO will request IRQ again */
833 if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
834 free_irq(ssi->irq, mod);
836 rsnd_flags_del(ssi, RSND_SSI_PROBED);
845 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
846 struct rsnd_dai_stream *io)
848 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
849 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
850 u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);
853 bool elapsed = false;
855 if (snd_pcm_format_width(runtime->format) == 24)
859 * 8/16/32 data can be assesse to TDR/RDR register
860 * directly as 32bit data
861 * see rsnd_ssi_init()
863 if (rsnd_io_is_play(io))
864 rsnd_mod_write(mod, SSITDR, (*buf) << shift);
866 *buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
868 byte_pos = ssi->byte_pos + sizeof(*buf);
870 if (byte_pos >= ssi->next_period_byte) {
871 int period_pos = byte_pos / ssi->byte_per_period;
873 if (period_pos >= runtime->periods) {
878 ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;
883 WRITE_ONCE(ssi->byte_pos, byte_pos);
888 static int rsnd_ssi_pio_init(struct rsnd_mod *mod,
889 struct rsnd_dai_stream *io,
890 struct rsnd_priv *priv)
892 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
893 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
895 if (!rsnd_ssi_is_parent(mod, io)) {
897 ssi->byte_per_period = runtime->period_size *
899 samples_to_bytes(runtime, 1);
900 ssi->next_period_byte = ssi->byte_per_period;
903 return rsnd_ssi_init(mod, io, priv);
906 static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod,
907 struct rsnd_dai_stream *io,
908 snd_pcm_uframes_t *pointer)
910 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
911 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
913 *pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));
918 static int rsnd_ssi_prepare(struct rsnd_mod *mod,
919 struct rsnd_dai_stream *io,
920 struct rsnd_priv *priv)
922 return rsnd_ssi_master_clk_start(mod, io);
925 static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
927 .probe = rsnd_ssi_common_probe,
928 .remove = rsnd_ssi_common_remove,
929 .init = rsnd_ssi_pio_init,
930 .quit = rsnd_ssi_quit,
931 .start = rsnd_ssi_start,
932 .stop = rsnd_ssi_stop,
934 .pointer = rsnd_ssi_pio_pointer,
935 .pcm_new = rsnd_ssi_pcm_new,
936 .hw_params = rsnd_ssi_hw_params,
937 .prepare = rsnd_ssi_prepare,
938 .get_status = rsnd_ssi_get_status,
941 static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
942 struct rsnd_dai_stream *io,
943 struct rsnd_priv *priv)
948 * SSIP/SSIU/IRQ/DMA are not needed on
951 if (rsnd_ssi_is_multi_slave(mod, io))
954 ret = rsnd_ssi_common_probe(mod, io, priv);
958 /* SSI probe might be called many times in MUX multi path */
959 ret = rsnd_dma_attach(io, mod, &io->dma);
964 static int rsnd_ssi_fallback(struct rsnd_mod *mod,
965 struct rsnd_dai_stream *io,
966 struct rsnd_priv *priv)
968 struct device *dev = rsnd_priv_to_dev(priv);
973 * SSI .probe might be called again.
975 * rsnd_rdai_continuance_probe()
977 mod->ops = &rsnd_ssi_pio_ops;
979 dev_info(dev, "%s fallback to PIO mode\n", rsnd_mod_name(mod));
984 static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
985 struct rsnd_mod *mod)
987 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
988 int is_play = rsnd_io_is_play(io);
992 * It should use "rcar_sound,ssiu" on DT.
993 * But, we need to keep compatibility for old version.
995 * If it has "rcar_sound.ssiu", it will be used.
996 * If not, "rcar_sound.ssi" will be used.
998 * rsnd_ssiu_dma_req()
1002 if (rsnd_ssi_use_busif(io))
1003 name = is_play ? "rxu" : "txu";
1005 name = is_play ? "rx" : "tx";
1007 return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
1011 static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
1013 .dma_req = rsnd_ssi_dma_req,
1014 .probe = rsnd_ssi_dma_probe,
1015 .remove = rsnd_ssi_common_remove,
1016 .init = rsnd_ssi_init,
1017 .quit = rsnd_ssi_quit,
1018 .start = rsnd_ssi_start,
1019 .stop = rsnd_ssi_stop,
1020 .irq = rsnd_ssi_irq,
1021 .pcm_new = rsnd_ssi_pcm_new,
1022 .fallback = rsnd_ssi_fallback,
1023 .hw_params = rsnd_ssi_hw_params,
1024 .prepare = rsnd_ssi_prepare,
1025 .get_status = rsnd_ssi_get_status,
1028 static int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
1030 return mod->ops == &rsnd_ssi_dma_ops;
1036 static void rsnd_ssi_connect(struct rsnd_mod *mod,
1037 struct rsnd_dai_stream *io)
1039 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
1040 enum rsnd_mod_type types[] = {
1046 enum rsnd_mod_type type;
1049 /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */
1050 for (i = 0; i < ARRAY_SIZE(types); i++) {
1052 if (!rsnd_io_to_mod(io, type)) {
1053 rsnd_dai_connect(mod, io, type);
1054 rsnd_rdai_channels_set(rdai, (i + 1) * 2);
1055 rsnd_rdai_ssi_lane_set(rdai, (i + 1));
1061 void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
1062 struct device_node *playback,
1063 struct device_node *capture)
1065 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1066 struct device_node *node;
1067 struct device_node *np;
1068 struct rsnd_mod *mod;
1071 node = rsnd_ssi_of_node(priv);
1076 for_each_child_of_node(node, np) {
1077 mod = rsnd_ssi_mod_get(priv, i);
1079 rsnd_ssi_connect(mod, &rdai->playback);
1081 rsnd_ssi_connect(mod, &rdai->capture);
1088 struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
1090 if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
1093 return rsnd_mod_get(rsnd_ssi_get(priv, id));
1096 int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
1101 return !!(rsnd_flags_has(rsnd_mod_to_ssi(mod), RSND_SSI_CLK_PIN_SHARE));
1104 int rsnd_ssi_probe(struct rsnd_priv *priv)
1106 struct device_node *node;
1107 struct device_node *np;
1108 struct device *dev = rsnd_priv_to_dev(priv);
1109 struct rsnd_mod_ops *ops;
1111 struct rsnd_ssi *ssi;
1112 char name[RSND_SSI_NAME_SIZE];
1115 node = rsnd_ssi_of_node(priv);
1119 nr = of_get_child_count(node);
1122 goto rsnd_ssi_probe_done;
1125 ssi = devm_kcalloc(dev, nr, sizeof(*ssi), GFP_KERNEL);
1128 goto rsnd_ssi_probe_done;
1135 for_each_child_of_node(node, np) {
1136 if (!of_device_is_available(np))
1139 ssi = rsnd_ssi_get(priv, i);
1141 snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
1144 clk = devm_clk_get(dev, name);
1148 goto rsnd_ssi_probe_done;
1151 if (of_get_property(np, "shared-pin", NULL))
1152 rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
1154 if (of_get_property(np, "no-busif", NULL))
1155 rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF);
1157 ssi->irq = irq_of_parse_and_map(np, 0);
1161 goto rsnd_ssi_probe_done;
1164 if (of_property_read_bool(np, "pio-transfer"))
1165 ops = &rsnd_ssi_pio_ops;
1167 ops = &rsnd_ssi_dma_ops;
1169 ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
1173 goto rsnd_ssi_probe_done;
1181 rsnd_ssi_probe_done:
1187 void rsnd_ssi_remove(struct rsnd_priv *priv)
1189 struct rsnd_ssi *ssi;
1192 for_each_rsnd_ssi(ssi, priv, i) {
1193 rsnd_mod_quit(rsnd_mod_get(ssi));