1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas R-Car SSIU/SSI support
34 #define	CHNL_6		(2 << 22)	/* Channels */
39 #define	DWL_18		(2 << 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)
234 		1, 2, 4, 8, 16, 6, 12,  in rsnd_ssi_clk_query()
294 	if (ssi->usrcnt > 0) {  in rsnd_ssi_master_clk_start()
295 		if (ssi->rate != rate) {  in rsnd_ssi_master_clk_start()
297 			return -EINVAL;  in rsnd_ssi_master_clk_start()
300 		if (ssi->chan != chan) {  in rsnd_ssi_master_clk_start()
302 			return -EINVAL;  in rsnd_ssi_master_clk_start()
311 		return -EIO;  in rsnd_ssi_master_clk_start()
328 	ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) |  in rsnd_ssi_master_clk_start()
330 	ssi->wsr = CONT;  in rsnd_ssi_master_clk_start()
331 	ssi->rate = rate;  in rsnd_ssi_master_clk_start()
332 	ssi->chan = chan;  in rsnd_ssi_master_clk_start()
352 	if (ssi->usrcnt > 1)  in rsnd_ssi_master_clk_stop()
355 	ssi->cr_clk	= 0;  in rsnd_ssi_master_clk_stop()
356 	ssi->rate	= 0;  in rsnd_ssi_master_clk_stop()
357 	ssi->chan	= 0;  in rsnd_ssi_master_clk_stop()
370 	u32 cr_own	= ssi->cr_own;  in rsnd_ssi_config_init()
371 	u32 cr_mode	= ssi->cr_mode;  in rsnd_ssi_config_init()
372 	u32 wsr		= ssi->wsr;  in rsnd_ssi_config_init()
389 	if (rdai->bit_clk_inv)  in rsnd_ssi_config_init()
391 	if (rdai->frm_clk_inv && !is_tdm)  in rsnd_ssi_config_init()
393 	if (rdai->data_alignment)  in rsnd_ssi_config_init()
395 	if (rdai->sys_delay)  in rsnd_ssi_config_init()
403 	wsr = ssi->wsr;  in rsnd_ssi_config_init()
420 	width = snd_pcm_format_width(runtime->format);  in rsnd_ssi_config_init()
423 		 * The SWL and DWL bits in SSICR should be fixed at 32-bit  in rsnd_ssi_config_init()
458 		case 2:  in rsnd_ssi_config_init()
463 					SSI_SYS_INT_ENABLE(i * 2));  in rsnd_ssi_config_init()
466 					       SSI_SYS_INT_ENABLE(i * 2),  in rsnd_ssi_config_init()
474 					SSI_SYS_INT_ENABLE((i * 2) + 1));  in rsnd_ssi_config_init()
477 					       SSI_SYS_INT_ENABLE((i * 2) + 1),  in rsnd_ssi_config_init()
486 	ssi->cr_own	= cr_own;  in rsnd_ssi_config_init()
487 	ssi->cr_mode	= cr_mode;  in rsnd_ssi_config_init()
488 	ssi->wsr	= wsr;  in rsnd_ssi_config_init()
495 	rsnd_mod_write(mod, SSIWSR,	ssi->wsr);  in rsnd_ssi_register_setup()
496 	rsnd_mod_write(mod, SSICR,	ssi->cr_own	|  in rsnd_ssi_register_setup()
497 					ssi->cr_clk	|  in rsnd_ssi_register_setup()
498 					ssi->cr_mode	|  in rsnd_ssi_register_setup()
499 					ssi->cr_en);  in rsnd_ssi_register_setup()
519 	ssi->usrcnt++;  in rsnd_ssi_init()
552 	if (!ssi->usrcnt) {  in rsnd_ssi_quit()
554 		return -EIO;  in rsnd_ssi_quit()
561 	ssi->usrcnt--;  in rsnd_ssi_quit()
563 	if (!ssi->usrcnt) {  in rsnd_ssi_quit()
564 		ssi->cr_own	= 0;  in rsnd_ssi_quit()
565 		ssi->cr_mode	= 0;  in rsnd_ssi_quit()
566 		ssi->wsr	= 0;  in rsnd_ssi_quit()
574 		case 2:  in rsnd_ssi_quit()
579 						SSI_SYS_INT_ENABLE(i * 2));  in rsnd_ssi_quit()
582 					       SSI_SYS_INT_ENABLE(i * 2),  in rsnd_ssi_quit()
590 					SSI_SYS_INT_ENABLE((i * 2) + 1));  in rsnd_ssi_quit()
593 					       SSI_SYS_INT_ENABLE((i * 2) + 1),  in rsnd_ssi_quit()
612 	if (fmt_width > rdai->chan_width) {  in rsnd_ssi_hw_params()
616 		dev_err(dev, "invalid combination of slot-width and format-data-width\n");  in rsnd_ssi_hw_params()
617 		return -EINVAL;  in rsnd_ssi_hw_params()
633 	 * EN will be set via SSIU :: SSI_CONTROL  in rsnd_ssi_start()
646 	ssi->cr_en = EN;  in rsnd_ssi_start()
648 	rsnd_mod_write(mod, SSICR,	ssi->cr_own	|  in rsnd_ssi_start()
649 					ssi->cr_clk	|  in rsnd_ssi_start()
650 					ssi->cr_mode	|  in rsnd_ssi_start()
651 					ssi->cr_en);  in rsnd_ssi_start()
669 	cr  =	ssi->cr_own	|  in rsnd_ssi_stop()
670 		ssi->cr_clk;  in rsnd_ssi_stop()
678 		rsnd_mod_write(mod, SSICR, cr | ssi->cr_en);  in rsnd_ssi_stop()
682 	/* In multi-SSI mode, stop is performed by setting ssi0129 in  in rsnd_ssi_stop()
695 	ssi->cr_en = 0;  in rsnd_ssi_stop()
728 		case 2:  in rsnd_ssi_irq()
760 	spin_lock(&priv->lock);  in __rsnd_ssi_interrupt()
786 		case 2:  in __rsnd_ssi_interrupt()
791 						       SSI_SYS_STATUS(i * 2));  in __rsnd_ssi_interrupt()
799 						       SSI_SYS_STATUS(i * 2),  in __rsnd_ssi_interrupt()
808 						SSI_SYS_STATUS((i * 2) + 1));  in __rsnd_ssi_interrupt()
816 						SSI_SYS_STATUS((i * 2) + 1),  in __rsnd_ssi_interrupt()
827 	spin_unlock(&priv->lock);  in __rsnd_ssi_interrupt()
833 		snd_pcm_stop_xrun(io->substream);  in __rsnd_ssi_interrupt()
852 	 * 2nd SSI might doesn't start. see also rsnd_mod_call()  in rsnd_ssi_get_status()
860 	 * 1) start Capture  ->	SSI0/SSI1 are started.  in rsnd_ssi_get_status()
861 	 * 2) start Playback ->	SSI0 doesn't work, because it is already  in rsnd_ssi_get_status()
865 	 * It doesn't need to start in 2nd start  in rsnd_ssi_get_status()
867 	 *	IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0  in rsnd_ssi_get_status()
869 	 *	IO-1: SRC1 -> CTU2 -+  in rsnd_ssi_get_status()
871 	 * 1) start IO-0 ->	start SSI0  in rsnd_ssi_get_status()
872 	 * 2) start IO-1 ->	SSI0 doesn't need to start, because it is  in rsnd_ssi_get_status()
876 		return &io->parent_ssi_status;  in rsnd_ssi_get_status()
901 	case 2:  in rsnd_ssi_parent_attach()
937 	 * SSIP/SSIU/IRQ are not needed on  in rsnd_ssi_common_probe()
955 	 * mod->status.  in rsnd_ssi_common_probe()
960 		ret = request_irq(ssi->irq,  in rsnd_ssi_common_probe()
984 		free_irq(ssi->irq, mod);  in rsnd_ssi_common_remove()
1000 	u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos);  in rsnd_ssi_pio_interrupt()
1005 	if (snd_pcm_format_width(runtime->format) == 24)  in rsnd_ssi_pio_interrupt()
1018 	byte_pos = ssi->byte_pos + sizeof(*buf);  in rsnd_ssi_pio_interrupt()
1020 	if (byte_pos >= ssi->next_period_byte) {  in rsnd_ssi_pio_interrupt()
1021 		int period_pos = byte_pos / ssi->byte_per_period;  in rsnd_ssi_pio_interrupt()
1023 		if (period_pos >= runtime->periods) {  in rsnd_ssi_pio_interrupt()
1028 		ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period;  in rsnd_ssi_pio_interrupt()
1033 	WRITE_ONCE(ssi->byte_pos, byte_pos);  in rsnd_ssi_pio_interrupt()
1046 		ssi->byte_pos		= 0;  in rsnd_ssi_pio_init()
1047 		ssi->byte_per_period	= runtime->period_size *  in rsnd_ssi_pio_init()
1048 					  runtime->channels *  in rsnd_ssi_pio_init()
1050 		ssi->next_period_byte	= ssi->byte_per_period;  in rsnd_ssi_pio_init()
1063 	*pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos));  in rsnd_ssi_pio_pointer()
1090 	 * SSIP/SSIU/IRQ/DMA are not needed on  in rsnd_ssi_dma_probe()
1101 	ret = rsnd_dma_attach(io, mod, &io->dma);  in rsnd_ssi_dma_probe()
1119 	mod->ops = &rsnd_ssi_pio_ops;  in rsnd_ssi_fallback()
1134 	 * It should use "rcar_sound,ssiu" on DT.  in rsnd_ssi_dma_req()
1137 	 * If it has "rcar_sound.ssiu", it will be used.  in rsnd_ssi_dma_req()
1171 	return mod->ops == &rsnd_ssi_dma_ops;  in rsnd_ssi_is_dma_mode()
1190 	/* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */  in rsnd_ssi_connect()
1195 			rsnd_rdai_channels_set(rdai, (i + 1) * 2);  in rsnd_ssi_connect()
1220 			rsnd_ssi_connect(mod, &rdai->playback);  in rsnd_parse_connect_ssi()
1222 			rsnd_ssi_connect(mod, &rdai->capture);  in rsnd_parse_connect_ssi()
1258 		return -EINVAL;  in rsnd_ssi_probe()
1262 		ret = -EINVAL;  in rsnd_ssi_probe()
1268 		ret = -ENOMEM;  in rsnd_ssi_probe()
1272 	priv->ssi	= ssi;  in rsnd_ssi_probe()
1273 	priv->ssi_nr	= nr;  in rsnd_ssi_probe()
1292 		if (of_get_property(np, "shared-pin", NULL))  in rsnd_ssi_probe()
1295 		if (of_get_property(np, "no-busif", NULL))  in rsnd_ssi_probe()
1298 		ssi->irq = irq_of_parse_and_map(np, 0);  in rsnd_ssi_probe()
1299 		if (!ssi->irq) {  in rsnd_ssi_probe()
1300 			ret = -EINVAL;  in rsnd_ssi_probe()
1305 		if (of_property_read_bool(np, "pio-transfer"))  in rsnd_ssi_probe()