1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas R-Car Audio DMAC support
42 	} dma;  member
52 #define rsnd_priv_to_dmac(p)	((struct rsnd_dma_ctrl *)(p)->dma)
54 #define rsnd_dma_to_dmaen(dma)	(&(dma)->dma.en)  argument
55 #define rsnd_dma_to_dmapp(dma)	(&(dma)->dma.pp)  argument
59 	.name = "mem",
62 static struct rsnd_mod mem = {  variable
86 	return snd_dmaengine_pcm_trigger(io->substream, SNDRV_PCM_TRIGGER_STOP);  in rsnd_dmaen_stop()
93 	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);  in rsnd_dmaen_cleanup()  local
94 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_cleanup()
101 	if (dmaen->chan)  in rsnd_dmaen_cleanup()
102 		snd_dmaengine_pcm_close_release_chan(io->substream);  in rsnd_dmaen_cleanup()
104 	dmaen->chan = NULL;  in rsnd_dmaen_cleanup()
113 	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);  in rsnd_dmaen_prepare()  local
114 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_prepare()
118 	if (dmaen->chan)  in rsnd_dmaen_prepare()
126 	dmaen->chan = rsnd_dmaen_request_channel(io,  in rsnd_dmaen_prepare()
127 						 dma->mod_from,  in rsnd_dmaen_prepare()
128 						 dma->mod_to);  in rsnd_dmaen_prepare()
129 	if (IS_ERR_OR_NULL(dmaen->chan)) {  in rsnd_dmaen_prepare()
130 		dmaen->chan = NULL;  in rsnd_dmaen_prepare()
131 		dev_err(dev, "can't get dma channel\n");  in rsnd_dmaen_prepare()
132 		return -EIO;  in rsnd_dmaen_prepare()
135 	return snd_dmaengine_pcm_open(io->substream, dmaen->chan);  in rsnd_dmaen_prepare()
142 	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);  in rsnd_dmaen_start()  local
143 	struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);  in rsnd_dmaen_start()
150 	 * in case of monaural data writing or reading through Audio-DMAC  in rsnd_dmaen_start()
152 	 * DMA Bus width need to be set equal to physical data width.  in rsnd_dmaen_start()
156 		int bits = snd_pcm_format_physical_width(runtime->format);  in rsnd_dmaen_start()
170 			return -EINVAL;  in rsnd_dmaen_start()
174 	cfg.direction	= snd_pcm_substream_to_dma_direction(io->substream);  in rsnd_dmaen_start()
175 	cfg.src_addr	= dma->src_addr;  in rsnd_dmaen_start()
176 	cfg.dst_addr	= dma->dst_addr;  in rsnd_dmaen_start()
180 	dev_dbg(dev, "%s %pad -> %pad\n",  in rsnd_dmaen_start()
184 	ret = dmaengine_slave_config(dmaen->chan, &cfg);  in rsnd_dmaen_start()
188 	return snd_dmaengine_pcm_trigger(io->substream, SNDRV_PCM_TRIGGER_START);  in rsnd_dmaen_start()
218 			   struct rsnd_dma *dma,  in rsnd_dmaen_attach()  argument
228 		/* Let's follow when -EPROBE_DEFER case */  in rsnd_dmaen_attach()
229 		if (PTR_ERR(chan) == -EPROBE_DEFER)  in rsnd_dmaen_attach()
233 		 * DMA failed. try to PIO mode  in rsnd_dmaen_attach()
238 		return -EAGAIN;  in rsnd_dmaen_attach()
246 	io->dmac_dev = chan->device->dev;  in rsnd_dmaen_attach()
250 	dmac->dmaen_num++;  in rsnd_dmaen_attach()
259 	*pointer = snd_dmaengine_pcm_pointer(io->substream);  in rsnd_dmaen_pointer()
349 		/* use non-prohibited SRS number as error */  in rsnd_dmapp_get_id()
364 #define rsnd_dmapp_addr(dmac, dma, reg) \  argument
365 	(dmac->ppbase + 0x20 + reg + \
366 	 (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
367 static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)  in rsnd_dmapp_write()  argument
369 	struct rsnd_mod *mod = rsnd_mod_get(dma);  in rsnd_dmapp_write()
374 	dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);  in rsnd_dmapp_write()
376 	iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));  in rsnd_dmapp_write()
379 static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)  in rsnd_dmapp_read()  argument
381 	struct rsnd_mod *mod = rsnd_mod_get(dma);  in rsnd_dmapp_read()
385 	return ioread32(rsnd_dmapp_addr(dmac, dma, reg));  in rsnd_dmapp_read()
388 static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg)  in rsnd_dmapp_bset()  argument
390 	struct rsnd_mod *mod = rsnd_mod_get(dma);  in rsnd_dmapp_bset()
393 	void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg);  in rsnd_dmapp_bset()
406 	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);  in rsnd_dmapp_stop()  local
409 	rsnd_dmapp_bset(dma, 0,  PDMACHCR_DE, PDMACHCR);  in rsnd_dmapp_stop()
412 		if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE))  in rsnd_dmapp_stop()
417 	return -EIO;  in rsnd_dmapp_stop()
424 	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);  in rsnd_dmapp_start()  local
425 	struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);  in rsnd_dmapp_start()
427 	rsnd_dmapp_write(dma, dma->src_addr,	PDMASAR);  in rsnd_dmapp_start()
428 	rsnd_dmapp_write(dma, dma->dst_addr,	PDMADAR);  in rsnd_dmapp_start()
429 	rsnd_dmapp_write(dma, dmapp->chcr,	PDMACHCR);  in rsnd_dmapp_start()
435 			     struct rsnd_dma *dma,  in rsnd_dmapp_attach()  argument
438 	struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);  in rsnd_dmapp_attach()
443 	dmapp->dmapp_id = dmac->dmapp_num;  in rsnd_dmapp_attach()
444 	dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;  in rsnd_dmapp_attach()
446 	dmac->dmapp_num++;  in rsnd_dmapp_attach()
449 		dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);  in rsnd_dmapp_attach()
461 	struct rsnd_dma *dma = rsnd_mod_to_dma(mod);  in rsnd_dmapp_debug_info()  local
462 	struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);  in rsnd_dmapp_debug_info()
464 	rsnd_debugfs_reg_show(m, dmac->ppres, dmac->ppbase,  in rsnd_dmapp_debug_info()
465 			      0x20 + 0x10 * dmapp->dmapp_id, 0x10);  in rsnd_dmapp_debug_info()
473 	.name		= "audmac-pp",
486  *	DMA read/write register offset
493  *	ex) R-Car H2 case
500 #define RDMA_SSI_I_N(addr, i)	(addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
501 #define RDMA_SSI_O_N(addr, i)	(addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
503 …DMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j)…
506 …DMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j)…
509 #define RDMA_SRC_I_N(addr, i)	(addr ##_reg - 0x00500000 + (0x400 * i))
510 #define RDMA_SRC_O_N(addr, i)	(addr ##_reg - 0x004fc000 + (0x400 * i))
512 #define RDMA_SRC_I_P(addr, i)	(addr ##_reg - 0x00200000 + (0x400 * i))
513 #define RDMA_SRC_O_P(addr, i)	(addr ##_reg - 0x001fc000 + (0x400 * i))
515 #define RDMA_CMD_O_N(addr, i)	(addr ##_reg - 0x004f8000 + (0x400 * i))
516 #define RDMA_CMD_O_P(addr, i)	(addr ##_reg - 0x001f8000 + (0x400 * i))
573 	 * We can't support SSI9-4/5/6/7, because its address is  in rsnd_gen2_dma_addr()
577 		dev_err(dev, "This driver doesn't support SSI%d-%d, so far",  in rsnd_gen2_dma_addr()
594  *	Gen4 DMA read/write register offset
596  *	ex) R-Car V4H case
597  *		  mod		/ SYS-DMAC in	/ SYS-DMAC out
617 		return -EINVAL;  in rsnd_gen4_dma_addr()
633 	 * gen1 uses default DMA addr  in rsnd_dma_addr()
693 	 * [S] -*-> [E]  in rsnd_dma_of_path()
694 	 * [S] -*-> SRC -o-> [E]  in rsnd_dma_of_path()
695 	 * [S] -*-> SRC -> DVC -o-> [E]  in rsnd_dma_of_path()
696 	 * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]  in rsnd_dma_of_path()
698 	 * playback	[S] = mem  in rsnd_dma_of_path()
702 	 *		[E] = mem  in rsnd_dma_of_path()
704 	 * -*->		Audio DMAC  in rsnd_dma_of_path()
705 	 * -o->		Audio DMAC peri peri  in rsnd_dma_of_path()
731 	 * -------------+-----+-----+  in rsnd_dma_of_path()
736 		*mod_from	= mod[idx - 1];  in rsnd_dma_of_path()
746 			rsnd_mod_name(mod[i] ? mod[i] : &mem),  in rsnd_dma_of_path()
760 	struct rsnd_dma *dma;  in rsnd_dma_alloc()  local
763 	int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma,  in rsnd_dma_alloc()
769 	 * DMA failed. try to PIO mode  in rsnd_dma_alloc()
775 		return -EAGAIN;  in rsnd_dma_alloc()
783 		dma_id	= dmac->dmapp_num;  in rsnd_dma_alloc()
788 		dma_id	= dmac->dmaen_num;  in rsnd_dma_alloc()
796 		dma_id	= dmac->dmaen_num;  in rsnd_dma_alloc()
800 	dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);  in rsnd_dma_alloc()
801 	if (!dma)  in rsnd_dma_alloc()
802 		return -ENOMEM;  in rsnd_dma_alloc()
804 	*dma_mod = rsnd_mod_get(dma);  in rsnd_dma_alloc()
811 	dev_dbg(dev, "%s %s -> %s\n",  in rsnd_dma_alloc()
813 		rsnd_mod_name(mod_from ? mod_from : &mem),  in rsnd_dma_alloc()
814 		rsnd_mod_name(mod_to   ? mod_to   : &mem));  in rsnd_dma_alloc()
816 	ret = attach(io, dma, mod_from, mod_to);  in rsnd_dma_alloc()
820 	dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);  in rsnd_dma_alloc()
821 	dma->dst_addr = rsnd_dma_addr(io, mod_to,   is_play, 0);  in rsnd_dma_alloc()
822 	dma->mod_from = mod_from;  in rsnd_dma_alloc()
823 	dma->mod_to   = mod_to;  in rsnd_dma_alloc()
838 	return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type);  in rsnd_dma_attach()
859 		dev_err(dev, "dma allocate failed\n");  in rsnd_dma_probe()
863 	/* for Gen4 doesn't have DMA-pp */  in rsnd_dma_probe()
873 	dmac->dmapp_num = 0;  in rsnd_dma_probe()
874 	dmac->ppres  = res->start;  in rsnd_dma_probe()
875 	dmac->ppbase = devm_ioremap_resource(dev, res);  in rsnd_dma_probe()
876 	if (IS_ERR(dmac->ppbase))  in rsnd_dma_probe()
877 		return PTR_ERR(dmac->ppbase);  in rsnd_dma_probe()
879 	priv->dma = dmac;  in rsnd_dma_probe()
881 	/* dummy mem mod for debug */  in rsnd_dma_probe()
882 	return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0);  in rsnd_dma_probe()