1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas R-Car SSIU/SSI support
5 // Copyright (C) 2013 Renesas Solutions Corp.
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 */
45 #define SWL_32 (3 << 16) /* R/W System Word Length */
46 #define SCKD (1 << 15) /* Serial Bit Clock Direction */
47 #define SWSD (1 << 14) /* Serial WS Direction */
48 #define SCKP (1 << 13) /* Serial Bit Clock Polarity */
49 #define SWSP (1 << 12) /* Serial WS Polarity */
50 #define SDTA (1 << 10) /* Serial Data Alignment */
51 #define PDTA (1 << 9) /* Parallel Data Alignment */
52 #define DEL (1 << 8) /* Serial Data Delay */
53 #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */
54 #define TRMD (1 << 1) /* Transmit/Receive Mode Select */
55 #define EN (1 << 0) /* SSI Module Enable */
60 #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */
61 #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */
62 #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */
63 #define DIRQ (1 << 24) /* Data Interrupt Status Flag */
68 #define CONT (1 << 8) /* WS Continue Function */
69 #define WS_MODE (1 << 0) /* WS Mode */
71 #define SSI_NAME "ssi"
95 #define RSND_SSI_CLK_PIN_SHARE (1 << 0)
96 #define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */
97 #define RSND_SSI_HDMI0 (1 << 2) /* for HDMI0 */
98 #define RSND_SSI_HDMI1 (1 << 3) /* for HDMI1 */
99 #define RSND_SSI_PROBED (1 << 4)
101 #define for_each_rsnd_ssi(pos, priv, i) \
103 (i < rsnd_ssi_nr(priv)) && \
104 ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \
107 #define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id)
108 #define rsnd_ssi_nr(priv) ((priv)->ssi_nr)
109 #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
110 #define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io))
111 #define rsnd_ssi_is_multi_slave(mod, io) \
112 (rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod)))
113 #define rsnd_ssi_is_run_mods(mod, io) \
114 (rsnd_ssi_run_mods(io) & (1 << rsnd_mod_id(mod)))
115 #define rsnd_ssi_can_output_clk(mod) (!__rsnd_ssi_is_pin_sharing(mod))
117 int rsnd_ssi_hdmi_port(struct rsnd_dai_stream *io)
119 struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
120 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
122 if (rsnd_flags_has(ssi, RSND_SSI_HDMI0))
123 return RSND_SSI_HDMI_PORT0;
125 if (rsnd_flags_has(ssi, RSND_SSI_HDMI1))
126 return RSND_SSI_HDMI_PORT1;
131 int rsnd_ssi_use_busif(struct rsnd_dai_stream *io)
133 struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
134 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
137 if (!rsnd_ssi_is_dma_mode(mod))
140 if (!(rsnd_flags_has(ssi, RSND_SSI_NO_BUSIF)))
142 if (rsnd_io_to_mod_src(io))
148 static void rsnd_ssi_status_clear(struct rsnd_mod *mod)
150 rsnd_mod_write(mod, SSISR, 0);
153 static u32 rsnd_ssi_status_get(struct rsnd_mod *mod)
155 return rsnd_mod_read(mod, SSISR);
158 static void rsnd_ssi_status_check(struct rsnd_mod *mod,
161 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
162 struct device *dev = rsnd_priv_to_dev(priv);
166 for (i = 0; i < 1024; i++) {
167 status = rsnd_ssi_status_get(mod);
174 dev_warn(dev, "%s[%d] status check failed\n",
175 rsnd_mod_name(mod), rsnd_mod_id(mod));
178 static u32 rsnd_ssi_multi_slaves(struct rsnd_dai_stream *io)
180 struct rsnd_mod *mod;
181 enum rsnd_mod_type types[] = {
189 for (i = 0; i < ARRAY_SIZE(types); i++) {
190 mod = rsnd_io_to_mod(io, types[i]);
194 mask |= 1 << rsnd_mod_id(mod);
200 static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io)
202 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
203 struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
206 mods = rsnd_ssi_multi_slaves_runtime(io) |
207 1 << rsnd_mod_id(ssi_mod);
210 mods |= 1 << rsnd_mod_id(ssi_parent_mod);
215 u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io)
217 if (rsnd_runtime_is_ssi_multi(io))
218 return rsnd_ssi_multi_slaves(io);
223 unsigned int rsnd_ssi_clk_query(struct rsnd_priv *priv,
224 int param1, int param2, int *idx)
226 int ssi_clk_mul_table[] = {
227 1, 2, 4, 8, 16, 6, 12,
230 unsigned int main_rate;
232 for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
235 * It will set SSIWSR.CONT here, but SSICR.CKDV = 000
236 * with it is not allowed. (SSIWSR.WS_MODE with
237 * SSICR.CKDV = 000 is not allowed either).
238 * Skip it. See SSICR.CKDV
244 * this driver is assuming that
245 * system word is 32bit x chan
246 * see rsnd_ssi_init()
248 main_rate = 32 * param1 * param2 * ssi_clk_mul_table[j];
250 ret = rsnd_adg_clk_query(priv, main_rate);
263 static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
264 struct rsnd_dai_stream *io)
266 struct rsnd_priv *priv = rsnd_io_to_priv(io);
267 struct device *dev = rsnd_priv_to_dev(priv);
268 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
269 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
270 int chan = rsnd_runtime_channel_for_ssi(io);
272 unsigned int main_rate;
273 unsigned int rate = rsnd_io_is_play(io) ?
274 rsnd_src_get_out_rate(priv, io) :
275 rsnd_src_get_in_rate(priv, io);
277 if (!rsnd_rdai_is_clk_master(rdai))
280 if (!rsnd_ssi_can_output_clk(mod))
283 if (rsnd_ssi_is_multi_slave(mod, io))
287 if (ssi->rate != rate) {
288 dev_err(dev, "SSI parent/child should use same rate\n");
295 main_rate = rsnd_ssi_clk_query(priv, rate, chan, &idx);
297 dev_err(dev, "unsupported clock rate\n");
301 ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
306 * SSI clock will be output contiguously
308 * This means, rsnd_ssi_master_clk_start()
309 * and rsnd_ssi_register_setup() are necessary
312 * SSICR : FORCE, SCKD, SWSD
315 ssi->cr_clk = FORCE | SWL_32 | SCKD | SWSD | CKDV(idx);
319 dev_dbg(dev, "%s[%d] outputs %u Hz\n",
321 rsnd_mod_id(mod), rate);
326 static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
327 struct rsnd_dai_stream *io)
329 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
330 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
332 if (!rsnd_rdai_is_clk_master(rdai))
335 if (!rsnd_ssi_can_output_clk(mod))
344 rsnd_adg_ssi_clk_stop(mod);
347 static void rsnd_ssi_config_init(struct rsnd_mod *mod,
348 struct rsnd_dai_stream *io)
350 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
351 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
352 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
353 u32 cr_own = ssi->cr_own;
354 u32 cr_mode = ssi->cr_mode;
358 is_tdm = rsnd_runtime_is_ssi_tdm(io);
361 * always use 32bit system word.
362 * see also rsnd_ssi_master_clk_enable()
364 cr_own |= FORCE | SWL_32;
366 if (rdai->bit_clk_inv)
368 if (rdai->frm_clk_inv ^ is_tdm)
370 if (rdai->data_alignment)
376 * We shouldn't exchange SWSP after running.
377 * This means, parent needs to care it.
379 if (rsnd_ssi_is_parent(mod, io))
382 if (rsnd_io_is_play(io))
386 switch (snd_pcm_format_width(runtime->format)) {
395 if (rsnd_ssi_is_dma_mode(mod)) {
396 cr_mode = UIEN | OIEN | /* over/under run */
397 DMEN; /* DMA : enable DMA */
399 cr_mode = DIEN; /* PIO : enable Data interrupt */
405 * rsnd_ssiu_init_gen2()
413 ssi->cr_own = cr_own;
414 ssi->cr_mode = cr_mode;
418 static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
420 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
422 rsnd_mod_write(mod, SSIWSR, ssi->wsr);
423 rsnd_mod_write(mod, SSICR, ssi->cr_own |
430 * SSI mod common functions
432 static int rsnd_ssi_init(struct rsnd_mod *mod,
433 struct rsnd_dai_stream *io,
434 struct rsnd_priv *priv)
436 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
438 if (!rsnd_ssi_is_run_mods(mod, io))
443 rsnd_mod_power_on(mod);
445 rsnd_ssi_config_init(mod, io);
447 rsnd_ssi_register_setup(mod);
449 /* clear error status */
450 rsnd_ssi_status_clear(mod);
455 static int rsnd_ssi_quit(struct rsnd_mod *mod,
456 struct rsnd_dai_stream *io,
457 struct rsnd_priv *priv)
459 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
460 struct device *dev = rsnd_priv_to_dev(priv);
462 if (!rsnd_ssi_is_run_mods(mod, io))
466 dev_err(dev, "%s[%d] usrcnt error\n",
467 rsnd_mod_name(mod), rsnd_mod_id(mod));
471 rsnd_ssi_master_clk_stop(mod, io);
473 rsnd_mod_power_off(mod);
486 static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
487 struct rsnd_dai_stream *io,
488 struct snd_pcm_substream *substream,
489 struct snd_pcm_hw_params *params)
491 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
492 int chan = params_channels(params);
495 * snd_pcm_ops::hw_params will be called *before*
496 * snd_soc_dai_ops::trigger. Thus, ssi->usrcnt is 0
502 * It will happen if SSI has parent/child connection.
503 * it is error if child <-> parent SSI uses
504 * different channels.
506 if (ssi->chan != chan)
515 static int rsnd_ssi_start(struct rsnd_mod *mod,
516 struct rsnd_dai_stream *io,
517 struct rsnd_priv *priv)
519 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
521 if (!rsnd_ssi_is_run_mods(mod, io))
525 * EN will be set via SSIU :: SSI_CONTROL
526 * if Multi channel mode
528 if (rsnd_ssi_multi_slaves_runtime(io))
532 * EN is for data output.
533 * SSI parent EN is not needed.
535 if (rsnd_ssi_is_parent(mod, io))
540 rsnd_mod_write(mod, SSICR, ssi->cr_own |
548 static int rsnd_ssi_stop(struct rsnd_mod *mod,
549 struct rsnd_dai_stream *io,
550 struct rsnd_priv *priv)
552 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
555 if (!rsnd_ssi_is_run_mods(mod, io))
558 if (rsnd_ssi_is_parent(mod, io))
566 * Playback: Wait all data was sent
567 * Capture: It might not receave data. Do nothing
569 if (rsnd_io_is_play(io)) {
570 rsnd_mod_write(mod, SSICR, cr | EN);
571 rsnd_ssi_status_check(mod, DIRQ);
576 * and, wait idle state
578 rsnd_mod_write(mod, SSICR, cr); /* disabled all */
579 rsnd_ssi_status_check(mod, IIRQ);
586 static int rsnd_ssi_irq(struct rsnd_mod *mod,
587 struct rsnd_dai_stream *io,
588 struct rsnd_priv *priv,
593 if (rsnd_is_gen1(priv))
596 if (rsnd_ssi_is_parent(mod, io))
599 if (!rsnd_ssi_is_run_mods(mod, io))
603 val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
605 rsnd_mod_write(mod, SSI_INT_ENABLE, val);
610 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
611 struct rsnd_dai_stream *io);
612 static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
613 struct rsnd_dai_stream *io)
615 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
616 struct device *dev = rsnd_priv_to_dev(priv);
617 int is_dma = rsnd_ssi_is_dma_mode(mod);
619 bool elapsed = false;
622 spin_lock(&priv->lock);
624 /* ignore all cases if not working */
625 if (!rsnd_io_is_working(io))
626 goto rsnd_ssi_interrupt_out;
628 status = rsnd_ssi_status_get(mod);
631 if (!is_dma && (status & DIRQ))
632 elapsed = rsnd_ssi_pio_interrupt(mod, io);
635 if (is_dma && (status & (UIRQ | OIRQ))) {
636 rsnd_dbg_irq_status(dev, "%s[%d] err status : 0x%08x\n",
637 rsnd_mod_name(mod), rsnd_mod_id(mod), status);
642 rsnd_ssi_status_clear(mod);
643 rsnd_ssi_interrupt_out:
644 spin_unlock(&priv->lock);
647 rsnd_dai_period_elapsed(io);
650 snd_pcm_stop_xrun(io->substream);
654 static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
656 struct rsnd_mod *mod = data;
658 rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
666 static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
667 struct rsnd_dai_stream *io)
669 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
670 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
672 if (!__rsnd_ssi_is_pin_sharing(mod))
675 if (!rsnd_rdai_is_clk_master(rdai))
678 switch (rsnd_mod_id(mod)) {
681 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
684 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
687 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
692 static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
693 struct rsnd_dai_stream *io,
694 struct snd_soc_pcm_runtime *rtd)
697 * rsnd_rdai_is_clk_master() will be enabled after set_fmt,
698 * and, pcm_new will be called after it.
699 * This function reuse pcm_new at this point.
701 rsnd_ssi_parent_attach(mod, io);
706 static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
707 struct rsnd_dai_stream *io,
708 struct rsnd_priv *priv)
710 struct device *dev = rsnd_priv_to_dev(priv);
711 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
715 * SSIP/SSIU/IRQ are not needed on
718 if (rsnd_ssi_is_multi_slave(mod, io))
722 * It can't judge ssi parent at this point
723 * see rsnd_ssi_pcm_new()
726 ret = rsnd_ssiu_attach(io, mod);
731 * SSI might be called again as PIO fallback
732 * It is easy to manual handling for IRQ request/free
734 * OTOH, this function might be called many times if platform is
735 * using MIX. It needs xxx_attach() many times on xxx_probe().
736 * Because of it, we can't control .probe/.remove calling count by
738 * But it don't need to call request_irq() many times.
739 * Let's control it by RSND_SSI_PROBED flag.
741 if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
742 ret = request_irq(ssi->irq,
747 rsnd_flags_set(ssi, RSND_SSI_PROBED);
753 static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
754 struct rsnd_dai_stream *io,
755 struct rsnd_priv *priv)
757 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
758 struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io);
760 /* Do nothing if non SSI (= SSI parent, multi SSI) mod */
761 if (pure_ssi_mod != mod)
764 /* PIO will request IRQ again */
765 if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
766 free_irq(ssi->irq, mod);
768 rsnd_flags_del(ssi, RSND_SSI_PROBED);
777 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
778 struct rsnd_dai_stream *io)
780 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
781 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
782 u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);
785 bool elapsed = false;
787 if (snd_pcm_format_width(runtime->format) == 24)
791 * 8/16/32 data can be assesse to TDR/RDR register
792 * directly as 32bit data
793 * see rsnd_ssi_init()
795 if (rsnd_io_is_play(io))
796 rsnd_mod_write(mod, SSITDR, (*buf) << shift);
798 *buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
800 byte_pos = ssi->byte_pos + sizeof(*buf);
802 if (byte_pos >= ssi->next_period_byte) {
803 int period_pos = byte_pos / ssi->byte_per_period;
805 if (period_pos >= runtime->periods) {
810 ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;
815 WRITE_ONCE(ssi->byte_pos, byte_pos);
820 static int rsnd_ssi_pio_init(struct rsnd_mod *mod,
821 struct rsnd_dai_stream *io,
822 struct rsnd_priv *priv)
824 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
825 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
827 if (!rsnd_ssi_is_parent(mod, io)) {
829 ssi->byte_per_period = runtime->period_size *
831 samples_to_bytes(runtime, 1);
832 ssi->next_period_byte = ssi->byte_per_period;
835 return rsnd_ssi_init(mod, io, priv);
838 static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod,
839 struct rsnd_dai_stream *io,
840 snd_pcm_uframes_t *pointer)
842 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
843 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
845 *pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));
850 static int rsnd_ssi_prepare(struct rsnd_mod *mod,
851 struct rsnd_dai_stream *io,
852 struct rsnd_priv *priv)
854 return rsnd_ssi_master_clk_start(mod, io);
857 static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
859 .probe = rsnd_ssi_common_probe,
860 .remove = rsnd_ssi_common_remove,
861 .init = rsnd_ssi_pio_init,
862 .quit = rsnd_ssi_quit,
863 .start = rsnd_ssi_start,
864 .stop = rsnd_ssi_stop,
866 .pointer = rsnd_ssi_pio_pointer,
867 .pcm_new = rsnd_ssi_pcm_new,
868 .hw_params = rsnd_ssi_hw_params,
869 .prepare = rsnd_ssi_prepare,
872 static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
873 struct rsnd_dai_stream *io,
874 struct rsnd_priv *priv)
876 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
880 * SSIP/SSIU/IRQ/DMA are not needed on
883 if (rsnd_ssi_is_multi_slave(mod, io))
886 ret = rsnd_ssi_common_probe(mod, io, priv);
890 /* SSI probe might be called many times in MUX multi path */
891 ret = rsnd_dma_attach(io, mod, &ssi->dma);
896 static int rsnd_ssi_fallback(struct rsnd_mod *mod,
897 struct rsnd_dai_stream *io,
898 struct rsnd_priv *priv)
900 struct device *dev = rsnd_priv_to_dev(priv);
905 * SSI .probe might be called again.
907 * rsnd_rdai_continuance_probe()
909 mod->ops = &rsnd_ssi_pio_ops;
911 dev_info(dev, "%s[%d] fallback to PIO mode\n",
912 rsnd_mod_name(mod), rsnd_mod_id(mod));
917 static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
918 struct rsnd_mod *mod)
920 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
921 int is_play = rsnd_io_is_play(io);
924 if (rsnd_ssi_use_busif(io))
925 name = is_play ? "rxu" : "txu";
927 name = is_play ? "rx" : "tx";
929 return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
933 static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
935 .dma_req = rsnd_ssi_dma_req,
936 .probe = rsnd_ssi_dma_probe,
937 .remove = rsnd_ssi_common_remove,
938 .init = rsnd_ssi_init,
939 .quit = rsnd_ssi_quit,
940 .start = rsnd_ssi_start,
941 .stop = rsnd_ssi_stop,
943 .pcm_new = rsnd_ssi_pcm_new,
944 .fallback = rsnd_ssi_fallback,
945 .hw_params = rsnd_ssi_hw_params,
946 .prepare = rsnd_ssi_prepare,
949 int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
951 return mod->ops == &rsnd_ssi_dma_ops;
958 static void rsnd_ssi_connect(struct rsnd_mod *mod,
959 struct rsnd_dai_stream *io)
961 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
962 enum rsnd_mod_type types[] = {
968 enum rsnd_mod_type type;
971 /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */
972 for (i = 0; i < ARRAY_SIZE(types); i++) {
974 if (!rsnd_io_to_mod(io, type)) {
975 rsnd_dai_connect(mod, io, type);
976 rsnd_rdai_channels_set(rdai, (i + 1) * 2);
977 rsnd_rdai_ssi_lane_set(rdai, (i + 1));
983 void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
984 struct device_node *playback,
985 struct device_node *capture)
987 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
988 struct device_node *node;
989 struct device_node *np;
990 struct rsnd_mod *mod;
993 node = rsnd_ssi_of_node(priv);
998 for_each_child_of_node(node, np) {
999 mod = rsnd_ssi_mod_get(priv, i);
1001 rsnd_ssi_connect(mod, &rdai->playback);
1003 rsnd_ssi_connect(mod, &rdai->capture);
1010 static void __rsnd_ssi_parse_hdmi_connection(struct rsnd_priv *priv,
1011 struct rsnd_dai_stream *io,
1012 struct device_node *remote_ep)
1014 struct device *dev = rsnd_priv_to_dev(priv);
1015 struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
1016 struct rsnd_ssi *ssi;
1017 struct device_node *remote_node = of_graph_get_port_parent(remote_ep);
1019 /* support Gen3 only */
1020 if (!rsnd_is_gen3(priv))
1026 ssi = rsnd_mod_to_ssi(mod);
1029 if (strstr(remote_node->full_name, "hdmi@fead0000")) {
1030 rsnd_flags_set(ssi, RSND_SSI_HDMI0);
1031 dev_dbg(dev, "%s[%d] connected to HDMI0\n",
1032 rsnd_mod_name(mod), rsnd_mod_id(mod));
1036 if (strstr(remote_node->full_name, "hdmi@feae0000")) {
1037 rsnd_flags_set(ssi, RSND_SSI_HDMI1);
1038 dev_dbg(dev, "%s[%d] connected to HDMI1\n",
1039 rsnd_mod_name(mod), rsnd_mod_id(mod));
1043 void rsnd_ssi_parse_hdmi_connection(struct rsnd_priv *priv,
1044 struct device_node *endpoint,
1047 struct rsnd_dai *rdai = rsnd_rdai_get(priv, dai_i);
1048 struct device_node *remote_ep;
1050 remote_ep = of_graph_get_remote_endpoint(endpoint);
1054 __rsnd_ssi_parse_hdmi_connection(priv, &rdai->playback, remote_ep);
1055 __rsnd_ssi_parse_hdmi_connection(priv, &rdai->capture, remote_ep);
1058 struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
1060 if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
1063 return rsnd_mod_get(rsnd_ssi_get(priv, id));
1066 int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
1071 return !!(rsnd_flags_has(rsnd_mod_to_ssi(mod), RSND_SSI_CLK_PIN_SHARE));
1074 static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io,
1075 struct rsnd_mod *mod,
1076 enum rsnd_mod_type type)
1079 * SSIP (= SSI parent) needs to be special, otherwise,
1080 * 2nd SSI might doesn't start. see also rsnd_mod_call()
1082 * We can't include parent SSI status on SSI, because we don't know
1083 * how many SSI requests parent SSI. Thus, it is localed on "io" now.
1086 * Capture : SSI1 (needs SSI0)
1088 * 1) start Capture -> SSI0/SSI1 are started.
1089 * 2) start Playback -> SSI0 doesn't work, because it is already
1090 * marked as "started" on 1)
1092 * OTOH, using each mod's status is good for MUX case.
1093 * It doesn't need to start in 2nd start
1095 * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
1097 * IO-1: SRC1 -> CTU2 -+
1099 * 1) start IO-0 -> start SSI0
1100 * 2) start IO-1 -> SSI0 doesn't need to start, because it is
1101 * already started on 1)
1103 if (type == RSND_MOD_SSIP)
1104 return &io->parent_ssi_status;
1106 return rsnd_mod_get_status(io, mod, type);
1109 int rsnd_ssi_probe(struct rsnd_priv *priv)
1111 struct device_node *node;
1112 struct device_node *np;
1113 struct device *dev = rsnd_priv_to_dev(priv);
1114 struct rsnd_mod_ops *ops;
1116 struct rsnd_ssi *ssi;
1117 char name[RSND_SSI_NAME_SIZE];
1120 node = rsnd_ssi_of_node(priv);
1124 nr = of_get_child_count(node);
1127 goto rsnd_ssi_probe_done;
1130 ssi = devm_kcalloc(dev, nr, sizeof(*ssi), GFP_KERNEL);
1133 goto rsnd_ssi_probe_done;
1140 for_each_child_of_node(node, np) {
1141 if (!of_device_is_available(np))
1144 ssi = rsnd_ssi_get(priv, i);
1146 snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
1149 clk = devm_clk_get(dev, name);
1153 goto rsnd_ssi_probe_done;
1156 if (of_get_property(np, "shared-pin", NULL))
1157 rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
1159 if (of_get_property(np, "no-busif", NULL))
1160 rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF);
1162 ssi->irq = irq_of_parse_and_map(np, 0);
1166 goto rsnd_ssi_probe_done;
1169 if (of_property_read_bool(np, "pio-transfer"))
1170 ops = &rsnd_ssi_pio_ops;
1172 ops = &rsnd_ssi_dma_ops;
1174 ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
1175 rsnd_ssi_get_status, RSND_MOD_SSI, i);
1178 goto rsnd_ssi_probe_done;
1186 rsnd_ssi_probe_done:
1192 void rsnd_ssi_remove(struct rsnd_priv *priv)
1194 struct rsnd_ssi *ssi;
1197 for_each_rsnd_ssi(ssi, priv, i) {
1198 rsnd_mod_quit(rsnd_mod_get(ssi));