1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas R-Car SSIU/SSI support
34 #define	CHNL_6		(2u << 22)	/* Channels */
39 #define	DWL_18		(2u << 19)	/* Data Word Length */
49 #define	SWL_24		(2 << 16)	/* R/W System Word Length */
102 #define RSND_SSI_PROBED			(1 << 2)
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)
232 		1, 2, 4, 8, 16, 6, 12,  in rsnd_ssi_clk_query()
292 	if (ssi->usrcnt > 0) {  in rsnd_ssi_master_clk_start()
293 		if (ssi->rate != rate) {  in rsnd_ssi_master_clk_start()
295 			return -EINVAL;  in rsnd_ssi_master_clk_start()
298 		if (ssi->chan != chan) {  in rsnd_ssi_master_clk_start()
300 			return -EINVAL;  in rsnd_ssi_master_clk_start()
306 	ret = -EIO;  in rsnd_ssi_master_clk_start()
325 	ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) |  in rsnd_ssi_master_clk_start()
327 	ssi->wsr = CONT;  in rsnd_ssi_master_clk_start()
328 	ssi->rate = rate;  in rsnd_ssi_master_clk_start()
329 	ssi->chan = chan;  in rsnd_ssi_master_clk_start()
353 	if (ssi->usrcnt > 1)  in rsnd_ssi_master_clk_stop()
356 	ssi->cr_clk	= 0;  in rsnd_ssi_master_clk_stop()
357 	ssi->rate	= 0;  in rsnd_ssi_master_clk_stop()
358 	ssi->chan	= 0;  in rsnd_ssi_master_clk_stop()
371 	u32 cr_own	= ssi->cr_own;  in rsnd_ssi_config_init()
372 	u32 cr_mode	= ssi->cr_mode;  in rsnd_ssi_config_init()
373 	u32 wsr		= ssi->wsr;  in rsnd_ssi_config_init()
387 	if (rdai->bit_clk_inv)  in rsnd_ssi_config_init()
389 	if (rdai->frm_clk_inv && !is_tdm)  in rsnd_ssi_config_init()
391 	if (rdai->data_alignment)  in rsnd_ssi_config_init()
393 	if (rdai->sys_delay)  in rsnd_ssi_config_init()
417 	width = snd_pcm_format_width(runtime->format);  in rsnd_ssi_config_init()
420 		 * The SWL and DWL bits in SSICR should be fixed at 32-bit  in rsnd_ssi_config_init()
451 	ssi->cr_own	= cr_own;  in rsnd_ssi_config_init()
452 	ssi->cr_mode	= cr_mode;  in rsnd_ssi_config_init()
453 	ssi->wsr	= wsr;  in rsnd_ssi_config_init()
460 	rsnd_mod_write(mod, SSIWSR,	ssi->wsr);  in rsnd_ssi_register_setup()
461 	rsnd_mod_write(mod, SSICR,	ssi->cr_own	|  in rsnd_ssi_register_setup()
462 					ssi->cr_clk	|  in rsnd_ssi_register_setup()
463 					ssi->cr_mode	|  in rsnd_ssi_register_setup()
464 					ssi->cr_en);  in rsnd_ssi_register_setup()
484 	ssi->usrcnt++;  in rsnd_ssi_init()
510 	if (!ssi->usrcnt) {  in rsnd_ssi_quit()
512 		return -EIO;  in rsnd_ssi_quit()
519 	ssi->usrcnt--;  in rsnd_ssi_quit()
521 	if (!ssi->usrcnt) {  in rsnd_ssi_quit()
522 		ssi->cr_own	= 0;  in rsnd_ssi_quit()
523 		ssi->cr_mode	= 0;  in rsnd_ssi_quit()
524 		ssi->wsr	= 0;  in rsnd_ssi_quit()
538 	if (fmt_width > rdai->chan_width) {  in rsnd_ssi_hw_params()
542 		dev_err(dev, "invalid combination of slot-width and format-data-width\n");  in rsnd_ssi_hw_params()
543 		return -EINVAL;  in rsnd_ssi_hw_params()
559 	 * EN will be set via SSIU :: SSI_CONTROL  in rsnd_ssi_start()
572 	ssi->cr_en = EN;  in rsnd_ssi_start()
574 	rsnd_mod_write(mod, SSICR,	ssi->cr_own	|  in rsnd_ssi_start()
575 					ssi->cr_clk	|  in rsnd_ssi_start()
576 					ssi->cr_mode	|  in rsnd_ssi_start()
577 					ssi->cr_en);  in rsnd_ssi_start()
595 	cr  =	ssi->cr_own	|  in rsnd_ssi_stop()
596 		ssi->cr_clk;  in rsnd_ssi_stop()
604 		rsnd_mod_write(mod, SSICR, cr | ssi->cr_en);  in rsnd_ssi_stop()
608 	/* In multi-SSI mode, stop is performed by setting ssi0129 in  in rsnd_ssi_stop()
621 	ssi->cr_en = 0;  in rsnd_ssi_stop()
654 		case 2:  in rsnd_ssi_irq()
680 	spin_lock(&priv->lock);  in __rsnd_ssi_interrupt()
704 	spin_unlock(&priv->lock);  in __rsnd_ssi_interrupt()
710 		snd_pcm_stop_xrun(io->substream);  in __rsnd_ssi_interrupt()
729 	 * 2nd SSI might doesn't start. see also rsnd_mod_call()  in rsnd_ssi_get_status()
737 	 * 1) start Capture  ->	SSI0/SSI1 are started.  in rsnd_ssi_get_status()
738 	 * 2) start Playback ->	SSI0 doesn't work, because it is already  in rsnd_ssi_get_status()
742 	 * It doesn't need to start in 2nd start  in rsnd_ssi_get_status()
744 	 *	IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0  in rsnd_ssi_get_status()
746 	 *	IO-1: SRC1 -> CTU2 -+  in rsnd_ssi_get_status()
748 	 * 1) start IO-0 ->	start SSI0  in rsnd_ssi_get_status()
749 	 * 2) start IO-1 ->	SSI0 doesn't need to start, because it is  in rsnd_ssi_get_status()
753 		return &io->parent_ssi_status;  in rsnd_ssi_get_status()
778 	case 2:  in rsnd_ssi_parent_attach()
814 	 * SSIP/SSIU/IRQ are not needed on  in rsnd_ssi_common_probe()
832 	 * mod->status.  in rsnd_ssi_common_probe()
837 		ret = request_irq(ssi->irq,  in rsnd_ssi_common_probe()
861 		free_irq(ssi->irq, mod);  in rsnd_ssi_common_remove()
877 	u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);  in rsnd_ssi_pio_interrupt()
882 	if (snd_pcm_format_width(runtime->format) == 24)  in rsnd_ssi_pio_interrupt()
895 	byte_pos = ssi->byte_pos + sizeof(*buf);  in rsnd_ssi_pio_interrupt()
897 	if (byte_pos >= ssi->next_period_byte) {  in rsnd_ssi_pio_interrupt()
898 		int period_pos = byte_pos / ssi->byte_per_period;  in rsnd_ssi_pio_interrupt()
900 		if (period_pos >= runtime->periods) {  in rsnd_ssi_pio_interrupt()
905 		ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;  in rsnd_ssi_pio_interrupt()
910 	WRITE_ONCE(ssi->byte_pos, byte_pos);  in rsnd_ssi_pio_interrupt()
923 		ssi->byte_pos		= 0;  in rsnd_ssi_pio_init()
924 		ssi->byte_per_period	= runtime->period_size *  in rsnd_ssi_pio_init()
925 					  runtime->channels *  in rsnd_ssi_pio_init()
927 		ssi->next_period_byte	= ssi->byte_per_period;  in rsnd_ssi_pio_init()
940 	*pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));  in rsnd_ssi_pio_pointer()
967 	 * SSIP/SSIU/IRQ/DMA are not needed on  in rsnd_ssi_dma_probe()
978 	ret = rsnd_dma_attach(io, mod, &io->dma);  in rsnd_ssi_dma_probe()
996 	mod->ops = &rsnd_ssi_pio_ops;  in rsnd_ssi_fallback()
1011 	 * It should use "rcar_sound,ssiu" on DT.  in rsnd_ssi_dma_req()
1014 	 * If it has "rcar_sound.ssiu", it will be used.  in rsnd_ssi_dma_req()
1040 	seq_printf(m, "bit_clk_inv:     %d\n",		rdai->bit_clk_inv);  in rsnd_ssi_debug_info()
1041 	seq_printf(m, "frm_clk_inv:     %d\n",		rdai->frm_clk_inv);  in rsnd_ssi_debug_info()
1047 	seq_printf(m, "chan:            %d\n",		ssi->chan);  in rsnd_ssi_debug_info()
1048 	seq_printf(m, "user:            %d\n",		ssi->usrcnt);  in rsnd_ssi_debug_info()
1077 	return mod->ops == &rsnd_ssi_dma_ops;  in rsnd_ssi_is_dma_mode()
1096 	/* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */  in rsnd_ssi_connect()
1101 			rsnd_rdai_channels_set(rdai, (i + 1) * 2);  in rsnd_ssi_connect()
1135 			rsnd_ssi_connect(mod, &rdai->playback);  in rsnd_parse_connect_ssi()
1137 			rsnd_ssi_connect(mod, &rdai->capture);  in rsnd_parse_connect_ssi()
1173 		return -EINVAL;  in rsnd_ssi_probe()
1177 		ret = -EINVAL;  in rsnd_ssi_probe()
1183 		ret = -ENOMEM;  in rsnd_ssi_probe()
1187 	priv->ssi	= ssi;  in rsnd_ssi_probe()
1188 	priv->ssi_nr	= nr;  in rsnd_ssi_probe()
1197 			ret = -EINVAL;  in rsnd_ssi_probe()
1214 		if (of_property_read_bool(np, "shared-pin"))  in rsnd_ssi_probe()
1217 		if (of_property_read_bool(np, "no-busif"))  in rsnd_ssi_probe()
1220 		ssi->irq = irq_of_parse_and_map(np, 0);  in rsnd_ssi_probe()
1221 		if (!ssi->irq) {  in rsnd_ssi_probe()
1222 			ret = -EINVAL;  in rsnd_ssi_probe()
1227 		if (of_property_read_bool(np, "pio-transfer"))  in rsnd_ssi_probe()