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_HDMI0 (1 << 2) /* for HDMI0 */
103 #define RSND_SSI_HDMI1 (1 << 3) /* for HDMI1 */
104 #define RSND_SSI_PROBED (1 << 4)
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_slave(mod, io) \
117 (rsnd_ssi_multi_slaves(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_hdmi_port(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);
127 if (rsnd_flags_has(ssi, RSND_SSI_HDMI0))
128 return RSND_SSI_HDMI_PORT0;
130 if (rsnd_flags_has(ssi, RSND_SSI_HDMI1))
131 return RSND_SSI_HDMI_PORT1;
136 int rsnd_ssi_use_busif(struct rsnd_dai_stream *io)
138 struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
139 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
142 if (!rsnd_ssi_is_dma_mode(mod))
145 if (!(rsnd_flags_has(ssi, RSND_SSI_NO_BUSIF)))
147 if (rsnd_io_to_mod_src(io))
153 int rsnd_ssi_get_busif(struct rsnd_dai_stream *io)
155 return 0; /* BUSIF0 only for now */
158 static void rsnd_ssi_status_clear(struct rsnd_mod *mod)
160 rsnd_mod_write(mod, SSISR, 0);
163 static u32 rsnd_ssi_status_get(struct rsnd_mod *mod)
165 return rsnd_mod_read(mod, SSISR);
168 static void rsnd_ssi_status_check(struct rsnd_mod *mod,
171 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
172 struct device *dev = rsnd_priv_to_dev(priv);
176 for (i = 0; i < 1024; i++) {
177 status = rsnd_ssi_status_get(mod);
184 dev_warn(dev, "%s[%d] status check failed\n",
185 rsnd_mod_name(mod), rsnd_mod_id(mod));
188 static u32 rsnd_ssi_multi_slaves(struct rsnd_dai_stream *io)
190 struct rsnd_mod *mod;
191 enum rsnd_mod_type types[] = {
199 for (i = 0; i < ARRAY_SIZE(types); i++) {
200 mod = rsnd_io_to_mod(io, types[i]);
204 mask |= 1 << rsnd_mod_id(mod);
210 static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io)
212 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
213 struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
216 mods = rsnd_ssi_multi_slaves_runtime(io) |
217 1 << rsnd_mod_id(ssi_mod);
220 mods |= 1 << rsnd_mod_id(ssi_parent_mod);
225 u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io)
227 if (rsnd_runtime_is_ssi_multi(io))
228 return rsnd_ssi_multi_slaves(io);
233 static u32 rsnd_rdai_width_to_swl(struct rsnd_dai *rdai)
235 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
236 struct device *dev = rsnd_priv_to_dev(priv);
237 int width = rsnd_rdai_width_get(rdai);
240 case 32: return SWL_32;
241 case 24: return SWL_24;
242 case 16: return SWL_16;
245 dev_err(dev, "unsupported slot width value: %d\n", width);
249 unsigned int rsnd_ssi_clk_query(struct rsnd_dai *rdai,
250 int param1, int param2, int *idx)
252 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
253 int ssi_clk_mul_table[] = {
254 1, 2, 4, 8, 16, 6, 12,
257 unsigned int main_rate;
258 int width = rsnd_rdai_width_get(rdai);
260 for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
263 * It will set SSIWSR.CONT here, but SSICR.CKDV = 000
264 * with it is not allowed. (SSIWSR.WS_MODE with
265 * SSICR.CKDV = 000 is not allowed either).
266 * Skip it. See SSICR.CKDV
271 main_rate = width * param1 * param2 * ssi_clk_mul_table[j];
273 ret = rsnd_adg_clk_query(priv, main_rate);
286 static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod,
287 struct rsnd_dai_stream *io)
289 struct rsnd_priv *priv = rsnd_io_to_priv(io);
290 struct device *dev = rsnd_priv_to_dev(priv);
291 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
292 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
293 int chan = rsnd_runtime_channel_for_ssi(io);
295 unsigned int main_rate;
296 unsigned int rate = rsnd_io_is_play(io) ?
297 rsnd_src_get_out_rate(priv, io) :
298 rsnd_src_get_in_rate(priv, io);
300 if (!rsnd_rdai_is_clk_master(rdai))
303 if (!rsnd_ssi_can_output_clk(mod))
306 if (rsnd_ssi_is_multi_slave(mod, io))
310 if (ssi->rate != rate) {
311 dev_err(dev, "SSI parent/child should use same rate\n");
315 if (ssi->chan != chan) {
316 dev_err(dev, "SSI parent/child should use same chan\n");
323 main_rate = rsnd_ssi_clk_query(rdai, rate, chan, &idx);
325 dev_err(dev, "unsupported clock rate\n");
329 ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
334 * SSI clock will be output contiguously
336 * This means, rsnd_ssi_master_clk_start()
337 * and rsnd_ssi_register_setup() are necessary
340 * SSICR : FORCE, SCKD, SWSD
343 ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) |
344 SCKD | SWSD | CKDV(idx);
349 dev_dbg(dev, "%s[%d] outputs %u Hz\n",
351 rsnd_mod_id(mod), rate);
356 static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
357 struct rsnd_dai_stream *io)
359 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
360 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
362 if (!rsnd_rdai_is_clk_master(rdai))
365 if (!rsnd_ssi_can_output_clk(mod))
375 rsnd_adg_ssi_clk_stop(mod);
378 static void rsnd_ssi_config_init(struct rsnd_mod *mod,
379 struct rsnd_dai_stream *io)
381 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
382 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
383 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
384 u32 cr_own = ssi->cr_own;
385 u32 cr_mode = ssi->cr_mode;
389 is_tdm = rsnd_runtime_is_ssi_tdm(io);
391 cr_own |= FORCE | rsnd_rdai_width_to_swl(rdai);
393 if (rdai->bit_clk_inv)
395 if (rdai->frm_clk_inv ^ is_tdm)
397 if (rdai->data_alignment)
403 * We shouldn't exchange SWSP after running.
404 * This means, parent needs to care it.
406 if (rsnd_ssi_is_parent(mod, io))
409 if (rsnd_io_is_play(io))
413 switch (snd_pcm_format_width(runtime->format)) {
425 if (rsnd_ssi_is_dma_mode(mod)) {
426 cr_mode = UIEN | OIEN | /* over/under run */
427 DMEN; /* DMA : enable DMA */
429 cr_mode = DIEN; /* PIO : enable Data interrupt */
435 * rsnd_ssiu_init_gen2()
443 ssi->cr_own = cr_own;
444 ssi->cr_mode = cr_mode;
448 static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
450 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
452 rsnd_mod_write(mod, SSIWSR, ssi->wsr);
453 rsnd_mod_write(mod, SSICR, ssi->cr_own |
460 * SSI mod common functions
462 static int rsnd_ssi_init(struct rsnd_mod *mod,
463 struct rsnd_dai_stream *io,
464 struct rsnd_priv *priv)
466 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
468 if (!rsnd_ssi_is_run_mods(mod, io))
473 rsnd_mod_power_on(mod);
475 rsnd_ssi_config_init(mod, io);
477 rsnd_ssi_register_setup(mod);
479 /* clear error status */
480 rsnd_ssi_status_clear(mod);
485 static int rsnd_ssi_quit(struct rsnd_mod *mod,
486 struct rsnd_dai_stream *io,
487 struct rsnd_priv *priv)
489 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
490 struct device *dev = rsnd_priv_to_dev(priv);
492 if (!rsnd_ssi_is_run_mods(mod, io))
496 dev_err(dev, "%s[%d] usrcnt error\n",
497 rsnd_mod_name(mod), rsnd_mod_id(mod));
501 rsnd_ssi_master_clk_stop(mod, io);
503 rsnd_mod_power_off(mod);
516 static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
517 struct rsnd_dai_stream *io,
518 struct snd_pcm_substream *substream,
519 struct snd_pcm_hw_params *params)
521 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
522 unsigned int fmt_width = snd_pcm_format_width(params_format(params));
524 if (fmt_width > rdai->chan_width) {
525 struct rsnd_priv *priv = rsnd_io_to_priv(io);
526 struct device *dev = rsnd_priv_to_dev(priv);
528 dev_err(dev, "invalid combination of slot-width and format-data-width\n");
535 static int rsnd_ssi_start(struct rsnd_mod *mod,
536 struct rsnd_dai_stream *io,
537 struct rsnd_priv *priv)
539 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
541 if (!rsnd_ssi_is_run_mods(mod, io))
545 * EN will be set via SSIU :: SSI_CONTROL
546 * if Multi channel mode
548 if (rsnd_ssi_multi_slaves_runtime(io))
552 * EN is for data output.
553 * SSI parent EN is not needed.
555 if (rsnd_ssi_is_parent(mod, io))
560 rsnd_mod_write(mod, SSICR, ssi->cr_own |
568 static int rsnd_ssi_stop(struct rsnd_mod *mod,
569 struct rsnd_dai_stream *io,
570 struct rsnd_priv *priv)
572 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
575 if (!rsnd_ssi_is_run_mods(mod, io))
578 if (rsnd_ssi_is_parent(mod, io))
586 * Playback: Wait all data was sent
587 * Capture: It might not receave data. Do nothing
589 if (rsnd_io_is_play(io)) {
590 rsnd_mod_write(mod, SSICR, cr | EN);
591 rsnd_ssi_status_check(mod, DIRQ);
596 * and, wait idle state
598 rsnd_mod_write(mod, SSICR, cr); /* disabled all */
599 rsnd_ssi_status_check(mod, IIRQ);
606 static int rsnd_ssi_irq(struct rsnd_mod *mod,
607 struct rsnd_dai_stream *io,
608 struct rsnd_priv *priv,
613 if (rsnd_is_gen1(priv))
616 if (rsnd_ssi_is_parent(mod, io))
619 if (!rsnd_ssi_is_run_mods(mod, io))
623 val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
625 rsnd_mod_write(mod, SSI_INT_ENABLE, val);
630 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
631 struct rsnd_dai_stream *io);
632 static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
633 struct rsnd_dai_stream *io)
635 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
636 struct device *dev = rsnd_priv_to_dev(priv);
637 int is_dma = rsnd_ssi_is_dma_mode(mod);
639 bool elapsed = false;
642 spin_lock(&priv->lock);
644 /* ignore all cases if not working */
645 if (!rsnd_io_is_working(io))
646 goto rsnd_ssi_interrupt_out;
648 status = rsnd_ssi_status_get(mod);
651 if (!is_dma && (status & DIRQ))
652 elapsed = rsnd_ssi_pio_interrupt(mod, io);
655 if (is_dma && (status & (UIRQ | OIRQ))) {
656 rsnd_dbg_irq_status(dev, "%s[%d] err status : 0x%08x\n",
657 rsnd_mod_name(mod), rsnd_mod_id(mod), status);
662 rsnd_ssi_status_clear(mod);
663 rsnd_ssi_interrupt_out:
664 spin_unlock(&priv->lock);
667 rsnd_dai_period_elapsed(io);
670 snd_pcm_stop_xrun(io->substream);
674 static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
676 struct rsnd_mod *mod = data;
678 rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
686 static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
687 struct rsnd_dai_stream *io)
689 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
690 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
692 if (!__rsnd_ssi_is_pin_sharing(mod))
695 if (!rsnd_rdai_is_clk_master(rdai))
698 switch (rsnd_mod_id(mod)) {
701 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
704 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
707 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
712 static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
713 struct rsnd_dai_stream *io,
714 struct snd_soc_pcm_runtime *rtd)
717 * rsnd_rdai_is_clk_master() will be enabled after set_fmt,
718 * and, pcm_new will be called after it.
719 * This function reuse pcm_new at this point.
721 rsnd_ssi_parent_attach(mod, io);
726 static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
727 struct rsnd_dai_stream *io,
728 struct rsnd_priv *priv)
730 struct device *dev = rsnd_priv_to_dev(priv);
731 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
735 * SSIP/SSIU/IRQ are not needed on
738 if (rsnd_ssi_is_multi_slave(mod, io))
742 * It can't judge ssi parent at this point
743 * see rsnd_ssi_pcm_new()
746 ret = rsnd_ssiu_attach(io, mod);
751 * SSI might be called again as PIO fallback
752 * It is easy to manual handling for IRQ request/free
754 * OTOH, this function might be called many times if platform is
755 * using MIX. It needs xxx_attach() many times on xxx_probe().
756 * Because of it, we can't control .probe/.remove calling count by
758 * But it don't need to call request_irq() many times.
759 * Let's control it by RSND_SSI_PROBED flag.
761 if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
762 ret = request_irq(ssi->irq,
767 rsnd_flags_set(ssi, RSND_SSI_PROBED);
773 static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
774 struct rsnd_dai_stream *io,
775 struct rsnd_priv *priv)
777 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
778 struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io);
780 /* Do nothing if non SSI (= SSI parent, multi SSI) mod */
781 if (pure_ssi_mod != mod)
784 /* PIO will request IRQ again */
785 if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
786 free_irq(ssi->irq, mod);
788 rsnd_flags_del(ssi, RSND_SSI_PROBED);
797 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
798 struct rsnd_dai_stream *io)
800 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
801 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
802 u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);
805 bool elapsed = false;
807 if (snd_pcm_format_width(runtime->format) == 24)
811 * 8/16/32 data can be assesse to TDR/RDR register
812 * directly as 32bit data
813 * see rsnd_ssi_init()
815 if (rsnd_io_is_play(io))
816 rsnd_mod_write(mod, SSITDR, (*buf) << shift);
818 *buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
820 byte_pos = ssi->byte_pos + sizeof(*buf);
822 if (byte_pos >= ssi->next_period_byte) {
823 int period_pos = byte_pos / ssi->byte_per_period;
825 if (period_pos >= runtime->periods) {
830 ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;
835 WRITE_ONCE(ssi->byte_pos, byte_pos);
840 static int rsnd_ssi_pio_init(struct rsnd_mod *mod,
841 struct rsnd_dai_stream *io,
842 struct rsnd_priv *priv)
844 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
845 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
847 if (!rsnd_ssi_is_parent(mod, io)) {
849 ssi->byte_per_period = runtime->period_size *
851 samples_to_bytes(runtime, 1);
852 ssi->next_period_byte = ssi->byte_per_period;
855 return rsnd_ssi_init(mod, io, priv);
858 static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod,
859 struct rsnd_dai_stream *io,
860 snd_pcm_uframes_t *pointer)
862 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
863 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
865 *pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));
870 static int rsnd_ssi_prepare(struct rsnd_mod *mod,
871 struct rsnd_dai_stream *io,
872 struct rsnd_priv *priv)
874 return rsnd_ssi_master_clk_start(mod, io);
877 static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
879 .probe = rsnd_ssi_common_probe,
880 .remove = rsnd_ssi_common_remove,
881 .init = rsnd_ssi_pio_init,
882 .quit = rsnd_ssi_quit,
883 .start = rsnd_ssi_start,
884 .stop = rsnd_ssi_stop,
886 .pointer = rsnd_ssi_pio_pointer,
887 .pcm_new = rsnd_ssi_pcm_new,
888 .hw_params = rsnd_ssi_hw_params,
889 .prepare = rsnd_ssi_prepare,
892 static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
893 struct rsnd_dai_stream *io,
894 struct rsnd_priv *priv)
899 * SSIP/SSIU/IRQ/DMA are not needed on
902 if (rsnd_ssi_is_multi_slave(mod, io))
905 ret = rsnd_ssi_common_probe(mod, io, priv);
909 /* SSI probe might be called many times in MUX multi path */
910 ret = rsnd_dma_attach(io, mod, &io->dma);
915 static int rsnd_ssi_fallback(struct rsnd_mod *mod,
916 struct rsnd_dai_stream *io,
917 struct rsnd_priv *priv)
919 struct device *dev = rsnd_priv_to_dev(priv);
924 * SSI .probe might be called again.
926 * rsnd_rdai_continuance_probe()
928 mod->ops = &rsnd_ssi_pio_ops;
930 dev_info(dev, "%s[%d] fallback to PIO mode\n",
931 rsnd_mod_name(mod), rsnd_mod_id(mod));
936 static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
937 struct rsnd_mod *mod)
939 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
940 int is_play = rsnd_io_is_play(io);
943 if (rsnd_ssi_use_busif(io))
944 name = is_play ? "rxu" : "txu";
946 name = is_play ? "rx" : "tx";
948 return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
952 static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
954 .dma_req = rsnd_ssi_dma_req,
955 .probe = rsnd_ssi_dma_probe,
956 .remove = rsnd_ssi_common_remove,
957 .init = rsnd_ssi_init,
958 .quit = rsnd_ssi_quit,
959 .start = rsnd_ssi_start,
960 .stop = rsnd_ssi_stop,
962 .pcm_new = rsnd_ssi_pcm_new,
963 .fallback = rsnd_ssi_fallback,
964 .hw_params = rsnd_ssi_hw_params,
965 .prepare = rsnd_ssi_prepare,
968 int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
970 return mod->ops == &rsnd_ssi_dma_ops;
977 static void rsnd_ssi_connect(struct rsnd_mod *mod,
978 struct rsnd_dai_stream *io)
980 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
981 enum rsnd_mod_type types[] = {
987 enum rsnd_mod_type type;
990 /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */
991 for (i = 0; i < ARRAY_SIZE(types); i++) {
993 if (!rsnd_io_to_mod(io, type)) {
994 rsnd_dai_connect(mod, io, type);
995 rsnd_rdai_channels_set(rdai, (i + 1) * 2);
996 rsnd_rdai_ssi_lane_set(rdai, (i + 1));
1002 void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
1003 struct device_node *playback,
1004 struct device_node *capture)
1006 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1007 struct device_node *node;
1008 struct device_node *np;
1009 struct rsnd_mod *mod;
1012 node = rsnd_ssi_of_node(priv);
1017 for_each_child_of_node(node, np) {
1018 mod = rsnd_ssi_mod_get(priv, i);
1020 rsnd_ssi_connect(mod, &rdai->playback);
1022 rsnd_ssi_connect(mod, &rdai->capture);
1029 static void __rsnd_ssi_parse_hdmi_connection(struct rsnd_priv *priv,
1030 struct rsnd_dai_stream *io,
1031 struct device_node *remote_ep)
1033 struct device *dev = rsnd_priv_to_dev(priv);
1034 struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io);
1035 struct rsnd_ssi *ssi;
1036 struct device_node *remote_node = of_graph_get_port_parent(remote_ep);
1038 /* support Gen3 only */
1039 if (!rsnd_is_gen3(priv))
1045 ssi = rsnd_mod_to_ssi(mod);
1048 if (strstr(remote_node->full_name, "hdmi@fead0000")) {
1049 rsnd_flags_set(ssi, RSND_SSI_HDMI0);
1050 dev_dbg(dev, "%s[%d] connected to HDMI0\n",
1051 rsnd_mod_name(mod), rsnd_mod_id(mod));
1055 if (strstr(remote_node->full_name, "hdmi@feae0000")) {
1056 rsnd_flags_set(ssi, RSND_SSI_HDMI1);
1057 dev_dbg(dev, "%s[%d] connected to HDMI1\n",
1058 rsnd_mod_name(mod), rsnd_mod_id(mod));
1062 void rsnd_ssi_parse_hdmi_connection(struct rsnd_priv *priv,
1063 struct device_node *endpoint,
1066 struct rsnd_dai *rdai = rsnd_rdai_get(priv, dai_i);
1067 struct device_node *remote_ep;
1069 remote_ep = of_graph_get_remote_endpoint(endpoint);
1073 __rsnd_ssi_parse_hdmi_connection(priv, &rdai->playback, remote_ep);
1074 __rsnd_ssi_parse_hdmi_connection(priv, &rdai->capture, remote_ep);
1077 struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
1079 if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
1082 return rsnd_mod_get(rsnd_ssi_get(priv, id));
1085 int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
1090 return !!(rsnd_flags_has(rsnd_mod_to_ssi(mod), RSND_SSI_CLK_PIN_SHARE));
1093 static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io,
1094 struct rsnd_mod *mod,
1095 enum rsnd_mod_type type)
1098 * SSIP (= SSI parent) needs to be special, otherwise,
1099 * 2nd SSI might doesn't start. see also rsnd_mod_call()
1101 * We can't include parent SSI status on SSI, because we don't know
1102 * how many SSI requests parent SSI. Thus, it is localed on "io" now.
1105 * Capture : SSI1 (needs SSI0)
1107 * 1) start Capture -> SSI0/SSI1 are started.
1108 * 2) start Playback -> SSI0 doesn't work, because it is already
1109 * marked as "started" on 1)
1111 * OTOH, using each mod's status is good for MUX case.
1112 * It doesn't need to start in 2nd start
1114 * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
1116 * IO-1: SRC1 -> CTU2 -+
1118 * 1) start IO-0 -> start SSI0
1119 * 2) start IO-1 -> SSI0 doesn't need to start, because it is
1120 * already started on 1)
1122 if (type == RSND_MOD_SSIP)
1123 return &io->parent_ssi_status;
1125 return rsnd_mod_get_status(io, mod, type);
1128 int rsnd_ssi_probe(struct rsnd_priv *priv)
1130 struct device_node *node;
1131 struct device_node *np;
1132 struct device *dev = rsnd_priv_to_dev(priv);
1133 struct rsnd_mod_ops *ops;
1135 struct rsnd_ssi *ssi;
1136 char name[RSND_SSI_NAME_SIZE];
1139 node = rsnd_ssi_of_node(priv);
1143 nr = of_get_child_count(node);
1146 goto rsnd_ssi_probe_done;
1149 ssi = devm_kcalloc(dev, nr, sizeof(*ssi), GFP_KERNEL);
1152 goto rsnd_ssi_probe_done;
1159 for_each_child_of_node(node, np) {
1160 if (!of_device_is_available(np))
1163 ssi = rsnd_ssi_get(priv, i);
1165 snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
1168 clk = devm_clk_get(dev, name);
1172 goto rsnd_ssi_probe_done;
1175 if (of_get_property(np, "shared-pin", NULL))
1176 rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
1178 if (of_get_property(np, "no-busif", NULL))
1179 rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF);
1181 ssi->irq = irq_of_parse_and_map(np, 0);
1185 goto rsnd_ssi_probe_done;
1188 if (of_property_read_bool(np, "pio-transfer"))
1189 ops = &rsnd_ssi_pio_ops;
1191 ops = &rsnd_ssi_dma_ops;
1193 ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
1194 rsnd_ssi_get_status, RSND_MOD_SSI, i);
1197 goto rsnd_ssi_probe_done;
1205 rsnd_ssi_probe_done:
1211 void rsnd_ssi_remove(struct rsnd_priv *priv)
1213 struct rsnd_ssi *ssi;
1216 for_each_rsnd_ssi(ssi, priv, i) {
1217 rsnd_mod_quit(rsnd_mod_get(ssi));