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 (ssi->usrcnt > 1) {
290 if (ssi->rate != rate) {
291 dev_err(dev, "SSI parent/child should use same rate\n");
295 if (ssi->chan != chan) {
296 dev_err(dev, "SSI parent/child should use same chan\n");
303 if (rsnd_runtime_is_tdm_split(io))
304 chan = rsnd_io_converted_chan(io);
306 main_rate = rsnd_ssi_clk_query(rdai, rate, chan, &idx);
308 dev_err(dev, "unsupported clock rate\n");
312 ret = rsnd_adg_ssi_clk_try_start(mod, main_rate);
317 * SSI clock will be output contiguously
319 * This means, rsnd_ssi_master_clk_start()
320 * and rsnd_ssi_register_setup() are necessary
323 * SSICR : FORCE, SCKD, SWSD
326 ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) |
327 SCKD | SWSD | CKDV(idx);
332 dev_dbg(dev, "%s outputs %d chan %u Hz\n",
333 rsnd_mod_name(mod), chan, rate);
338 static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod,
339 struct rsnd_dai_stream *io)
341 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
342 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
344 if (!rsnd_rdai_is_clk_master(rdai))
347 if (!rsnd_ssi_can_output_clk(mod))
357 rsnd_adg_ssi_clk_stop(mod);
360 static void rsnd_ssi_config_init(struct rsnd_mod *mod,
361 struct rsnd_dai_stream *io)
363 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
364 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
365 struct device *dev = rsnd_priv_to_dev(priv);
366 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
367 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
368 u32 cr_own = ssi->cr_own;
369 u32 cr_mode = ssi->cr_mode;
372 int is_tdm, is_tdm_split;
374 is_tdm = rsnd_runtime_is_tdm(io);
375 is_tdm_split = rsnd_runtime_is_tdm_split(io);
378 dev_dbg(dev, "TDM mode\n");
380 dev_dbg(dev, "TDM Split mode\n");
382 cr_own |= FORCE | rsnd_rdai_width_to_swl(rdai);
384 if (rdai->bit_clk_inv)
386 if (rdai->frm_clk_inv && !is_tdm)
388 if (rdai->data_alignment)
396 * rsnd_ssiu_init_gen2()
399 if (is_tdm || is_tdm_split) {
405 * We shouldn't exchange SWSP after running.
406 * This means, parent needs to care it.
408 if (rsnd_ssi_is_parent(mod, io))
411 if (rsnd_io_is_play(io))
415 width = snd_pcm_format_width(runtime->format);
418 * The SWL and DWL bits in SSICR should be fixed at 32-bit
419 * setting when TDM split mode.
421 * Operation :: TDM Format Split Function (TDM Split Mode)
441 if (rsnd_ssi_is_dma_mode(mod)) {
442 cr_mode = UIEN | OIEN | /* over/under run */
443 DMEN; /* DMA : enable DMA */
445 cr_mode = DIEN; /* PIO : enable Data interrupt */
449 ssi->cr_own = cr_own;
450 ssi->cr_mode = cr_mode;
454 static void rsnd_ssi_register_setup(struct rsnd_mod *mod)
456 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
458 rsnd_mod_write(mod, SSIWSR, ssi->wsr);
459 rsnd_mod_write(mod, SSICR, ssi->cr_own |
466 * SSI mod common functions
468 static int rsnd_ssi_init(struct rsnd_mod *mod,
469 struct rsnd_dai_stream *io,
470 struct rsnd_priv *priv)
472 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
474 if (!rsnd_ssi_is_run_mods(mod, io))
479 rsnd_mod_power_on(mod);
481 rsnd_ssi_config_init(mod, io);
483 rsnd_ssi_register_setup(mod);
485 /* clear error status */
486 rsnd_ssi_status_clear(mod);
491 static int rsnd_ssi_quit(struct rsnd_mod *mod,
492 struct rsnd_dai_stream *io,
493 struct rsnd_priv *priv)
495 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
496 struct device *dev = rsnd_priv_to_dev(priv);
498 if (!rsnd_ssi_is_run_mods(mod, io))
502 dev_err(dev, "%s usrcnt error\n", rsnd_mod_name(mod));
506 rsnd_ssi_master_clk_stop(mod, io);
508 rsnd_mod_power_off(mod);
521 static int rsnd_ssi_hw_params(struct rsnd_mod *mod,
522 struct rsnd_dai_stream *io,
523 struct snd_pcm_substream *substream,
524 struct snd_pcm_hw_params *params)
526 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
527 unsigned int fmt_width = snd_pcm_format_width(params_format(params));
529 if (fmt_width > rdai->chan_width) {
530 struct rsnd_priv *priv = rsnd_io_to_priv(io);
531 struct device *dev = rsnd_priv_to_dev(priv);
533 dev_err(dev, "invalid combination of slot-width and format-data-width\n");
540 static int rsnd_ssi_start(struct rsnd_mod *mod,
541 struct rsnd_dai_stream *io,
542 struct rsnd_priv *priv)
544 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
546 if (!rsnd_ssi_is_run_mods(mod, io))
550 * EN will be set via SSIU :: SSI_CONTROL
551 * if Multi channel mode
553 if (rsnd_ssi_multi_slaves_runtime(io))
557 * EN is for data output.
558 * SSI parent EN is not needed.
560 if (rsnd_ssi_is_parent(mod, io))
565 rsnd_mod_write(mod, SSICR, ssi->cr_own |
573 static int rsnd_ssi_stop(struct rsnd_mod *mod,
574 struct rsnd_dai_stream *io,
575 struct rsnd_priv *priv)
577 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
580 if (!rsnd_ssi_is_run_mods(mod, io))
583 if (rsnd_ssi_is_parent(mod, io))
591 * Playback: Wait all data was sent
592 * Capture: It might not receave data. Do nothing
594 if (rsnd_io_is_play(io)) {
595 rsnd_mod_write(mod, SSICR, cr | EN);
596 rsnd_ssi_status_check(mod, DIRQ);
601 * and, wait idle state
603 rsnd_mod_write(mod, SSICR, cr); /* disabled all */
604 rsnd_ssi_status_check(mod, IIRQ);
611 static int rsnd_ssi_irq(struct rsnd_mod *mod,
612 struct rsnd_dai_stream *io,
613 struct rsnd_priv *priv,
618 if (rsnd_is_gen1(priv))
621 if (rsnd_ssi_is_parent(mod, io))
624 if (!rsnd_ssi_is_run_mods(mod, io))
628 val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000;
630 rsnd_mod_write(mod, SSI_INT_ENABLE, val);
635 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
636 struct rsnd_dai_stream *io);
637 static void __rsnd_ssi_interrupt(struct rsnd_mod *mod,
638 struct rsnd_dai_stream *io)
640 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
641 struct device *dev = rsnd_priv_to_dev(priv);
642 int is_dma = rsnd_ssi_is_dma_mode(mod);
644 bool elapsed = false;
647 spin_lock(&priv->lock);
649 /* ignore all cases if not working */
650 if (!rsnd_io_is_working(io))
651 goto rsnd_ssi_interrupt_out;
653 status = rsnd_ssi_status_get(mod);
656 if (!is_dma && (status & DIRQ))
657 elapsed = rsnd_ssi_pio_interrupt(mod, io);
660 if (is_dma && (status & (UIRQ | OIRQ))) {
661 rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n",
662 rsnd_mod_name(mod), status);
667 rsnd_ssi_status_clear(mod);
668 rsnd_ssi_interrupt_out:
669 spin_unlock(&priv->lock);
672 rsnd_dai_period_elapsed(io);
675 snd_pcm_stop_xrun(io->substream);
679 static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
681 struct rsnd_mod *mod = data;
683 rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt);
688 static u32 *rsnd_ssi_get_status(struct rsnd_mod *mod,
689 struct rsnd_dai_stream *io,
690 enum rsnd_mod_type type)
693 * SSIP (= SSI parent) needs to be special, otherwise,
694 * 2nd SSI might doesn't start. see also rsnd_mod_call()
696 * We can't include parent SSI status on SSI, because we don't know
697 * how many SSI requests parent SSI. Thus, it is localed on "io" now.
700 * Capture : SSI1 (needs SSI0)
702 * 1) start Capture -> SSI0/SSI1 are started.
703 * 2) start Playback -> SSI0 doesn't work, because it is already
704 * marked as "started" on 1)
706 * OTOH, using each mod's status is good for MUX case.
707 * It doesn't need to start in 2nd start
709 * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0
711 * IO-1: SRC1 -> CTU2 -+
713 * 1) start IO-0 -> start SSI0
714 * 2) start IO-1 -> SSI0 doesn't need to start, because it is
715 * already started on 1)
717 if (type == RSND_MOD_SSIP)
718 return &io->parent_ssi_status;
720 return rsnd_mod_get_status(mod, io, type);
726 static void rsnd_ssi_parent_attach(struct rsnd_mod *mod,
727 struct rsnd_dai_stream *io)
729 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
730 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
732 if (!__rsnd_ssi_is_pin_sharing(mod))
735 if (!rsnd_rdai_is_clk_master(rdai))
738 switch (rsnd_mod_id(mod)) {
741 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP);
744 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP);
747 rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP);
752 static int rsnd_ssi_pcm_new(struct rsnd_mod *mod,
753 struct rsnd_dai_stream *io,
754 struct snd_soc_pcm_runtime *rtd)
757 * rsnd_rdai_is_clk_master() will be enabled after set_fmt,
758 * and, pcm_new will be called after it.
759 * This function reuse pcm_new at this point.
761 rsnd_ssi_parent_attach(mod, io);
766 static int rsnd_ssi_common_probe(struct rsnd_mod *mod,
767 struct rsnd_dai_stream *io,
768 struct rsnd_priv *priv)
770 struct device *dev = rsnd_priv_to_dev(priv);
771 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
775 * SSIP/SSIU/IRQ are not needed on
778 if (rsnd_ssi_is_multi_slave(mod, io))
782 * It can't judge ssi parent at this point
783 * see rsnd_ssi_pcm_new()
787 * SSI might be called again as PIO fallback
788 * It is easy to manual handling for IRQ request/free
790 * OTOH, this function might be called many times if platform is
791 * using MIX. It needs xxx_attach() many times on xxx_probe().
792 * Because of it, we can't control .probe/.remove calling count by
794 * But it don't need to call request_irq() many times.
795 * Let's control it by RSND_SSI_PROBED flag.
797 if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
798 ret = request_irq(ssi->irq,
803 rsnd_flags_set(ssi, RSND_SSI_PROBED);
809 static int rsnd_ssi_common_remove(struct rsnd_mod *mod,
810 struct rsnd_dai_stream *io,
811 struct rsnd_priv *priv)
813 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
814 struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io);
816 /* Do nothing if non SSI (= SSI parent, multi SSI) mod */
817 if (pure_ssi_mod != mod)
820 /* PIO will request IRQ again */
821 if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) {
822 free_irq(ssi->irq, mod);
824 rsnd_flags_del(ssi, RSND_SSI_PROBED);
833 static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod,
834 struct rsnd_dai_stream *io)
836 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
837 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
838 u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);
841 bool elapsed = false;
843 if (snd_pcm_format_width(runtime->format) == 24)
847 * 8/16/32 data can be assesse to TDR/RDR register
848 * directly as 32bit data
849 * see rsnd_ssi_init()
851 if (rsnd_io_is_play(io))
852 rsnd_mod_write(mod, SSITDR, (*buf) << shift);
854 *buf = (rsnd_mod_read(mod, SSIRDR) >> shift);
856 byte_pos = ssi->byte_pos + sizeof(*buf);
858 if (byte_pos >= ssi->next_period_byte) {
859 int period_pos = byte_pos / ssi->byte_per_period;
861 if (period_pos >= runtime->periods) {
866 ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;
871 WRITE_ONCE(ssi->byte_pos, byte_pos);
876 static int rsnd_ssi_pio_init(struct rsnd_mod *mod,
877 struct rsnd_dai_stream *io,
878 struct rsnd_priv *priv)
880 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
881 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
883 if (!rsnd_ssi_is_parent(mod, io)) {
885 ssi->byte_per_period = runtime->period_size *
887 samples_to_bytes(runtime, 1);
888 ssi->next_period_byte = ssi->byte_per_period;
891 return rsnd_ssi_init(mod, io, priv);
894 static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod,
895 struct rsnd_dai_stream *io,
896 snd_pcm_uframes_t *pointer)
898 struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
899 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
901 *pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));
906 static int rsnd_ssi_prepare(struct rsnd_mod *mod,
907 struct rsnd_dai_stream *io,
908 struct rsnd_priv *priv)
910 return rsnd_ssi_master_clk_start(mod, io);
913 static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
915 .probe = rsnd_ssi_common_probe,
916 .remove = rsnd_ssi_common_remove,
917 .init = rsnd_ssi_pio_init,
918 .quit = rsnd_ssi_quit,
919 .start = rsnd_ssi_start,
920 .stop = rsnd_ssi_stop,
922 .pointer = rsnd_ssi_pio_pointer,
923 .pcm_new = rsnd_ssi_pcm_new,
924 .hw_params = rsnd_ssi_hw_params,
925 .prepare = rsnd_ssi_prepare,
926 .get_status = rsnd_ssi_get_status,
929 static int rsnd_ssi_dma_probe(struct rsnd_mod *mod,
930 struct rsnd_dai_stream *io,
931 struct rsnd_priv *priv)
936 * SSIP/SSIU/IRQ/DMA are not needed on
939 if (rsnd_ssi_is_multi_slave(mod, io))
942 ret = rsnd_ssi_common_probe(mod, io, priv);
946 /* SSI probe might be called many times in MUX multi path */
947 ret = rsnd_dma_attach(io, mod, &io->dma);
952 static int rsnd_ssi_fallback(struct rsnd_mod *mod,
953 struct rsnd_dai_stream *io,
954 struct rsnd_priv *priv)
956 struct device *dev = rsnd_priv_to_dev(priv);
961 * SSI .probe might be called again.
963 * rsnd_rdai_continuance_probe()
965 mod->ops = &rsnd_ssi_pio_ops;
967 dev_info(dev, "%s fallback to PIO mode\n", rsnd_mod_name(mod));
972 static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io,
973 struct rsnd_mod *mod)
975 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
976 int is_play = rsnd_io_is_play(io);
980 * It should use "rcar_sound,ssiu" on DT.
981 * But, we need to keep compatibility for old version.
983 * If it has "rcar_sound.ssiu", it will be used.
984 * If not, "rcar_sound.ssi" will be used.
986 * rsnd_ssiu_dma_req()
990 if (rsnd_ssi_use_busif(io))
991 name = is_play ? "rxu" : "txu";
993 name = is_play ? "rx" : "tx";
995 return rsnd_dma_request_channel(rsnd_ssi_of_node(priv),
999 static struct rsnd_mod_ops rsnd_ssi_dma_ops = {
1001 .dma_req = rsnd_ssi_dma_req,
1002 .probe = rsnd_ssi_dma_probe,
1003 .remove = rsnd_ssi_common_remove,
1004 .init = rsnd_ssi_init,
1005 .quit = rsnd_ssi_quit,
1006 .start = rsnd_ssi_start,
1007 .stop = rsnd_ssi_stop,
1008 .irq = rsnd_ssi_irq,
1009 .pcm_new = rsnd_ssi_pcm_new,
1010 .fallback = rsnd_ssi_fallback,
1011 .hw_params = rsnd_ssi_hw_params,
1012 .prepare = rsnd_ssi_prepare,
1013 .get_status = rsnd_ssi_get_status,
1016 static int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod)
1018 return mod->ops == &rsnd_ssi_dma_ops;
1024 static void rsnd_ssi_connect(struct rsnd_mod *mod,
1025 struct rsnd_dai_stream *io)
1027 struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
1028 enum rsnd_mod_type types[] = {
1034 enum rsnd_mod_type type;
1037 /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */
1038 for (i = 0; i < ARRAY_SIZE(types); i++) {
1040 if (!rsnd_io_to_mod(io, type)) {
1041 rsnd_dai_connect(mod, io, type);
1042 rsnd_rdai_channels_set(rdai, (i + 1) * 2);
1043 rsnd_rdai_ssi_lane_set(rdai, (i + 1));
1049 void rsnd_parse_connect_ssi(struct rsnd_dai *rdai,
1050 struct device_node *playback,
1051 struct device_node *capture)
1053 struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
1054 struct device_node *node;
1055 struct device_node *np;
1056 struct rsnd_mod *mod;
1059 node = rsnd_ssi_of_node(priv);
1064 for_each_child_of_node(node, np) {
1065 mod = rsnd_ssi_mod_get(priv, i);
1067 rsnd_ssi_connect(mod, &rdai->playback);
1069 rsnd_ssi_connect(mod, &rdai->capture);
1076 struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
1078 if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv)))
1081 return rsnd_mod_get(rsnd_ssi_get(priv, id));
1084 int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod)
1089 return !!(rsnd_flags_has(rsnd_mod_to_ssi(mod), RSND_SSI_CLK_PIN_SHARE));
1092 int rsnd_ssi_probe(struct rsnd_priv *priv)
1094 struct device_node *node;
1095 struct device_node *np;
1096 struct device *dev = rsnd_priv_to_dev(priv);
1097 struct rsnd_mod_ops *ops;
1099 struct rsnd_ssi *ssi;
1100 char name[RSND_SSI_NAME_SIZE];
1103 node = rsnd_ssi_of_node(priv);
1107 nr = of_get_child_count(node);
1110 goto rsnd_ssi_probe_done;
1113 ssi = devm_kcalloc(dev, nr, sizeof(*ssi), GFP_KERNEL);
1116 goto rsnd_ssi_probe_done;
1123 for_each_child_of_node(node, np) {
1124 if (!of_device_is_available(np))
1127 ssi = rsnd_ssi_get(priv, i);
1129 snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d",
1132 clk = devm_clk_get(dev, name);
1136 goto rsnd_ssi_probe_done;
1139 if (of_get_property(np, "shared-pin", NULL))
1140 rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE);
1142 if (of_get_property(np, "no-busif", NULL))
1143 rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF);
1145 ssi->irq = irq_of_parse_and_map(np, 0);
1149 goto rsnd_ssi_probe_done;
1152 if (of_property_read_bool(np, "pio-transfer"))
1153 ops = &rsnd_ssi_pio_ops;
1155 ops = &rsnd_ssi_dma_ops;
1157 ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk,
1161 goto rsnd_ssi_probe_done;
1169 rsnd_ssi_probe_done:
1175 void rsnd_ssi_remove(struct rsnd_priv *priv)
1177 struct rsnd_ssi *ssi;
1180 for_each_rsnd_ssi(ssi, priv, i) {
1181 rsnd_mod_quit(rsnd_mod_get(ssi));