1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2022 Schneider-Electric
13 #include <linux/soc/renesas/r9a06g032-sysctrl.h>
34 	dev_dbg(dev, "Unmapping DMAMUX request %u\n", map->req_idx);  in rzn1_dmamux_free()
36 	clear_bit(map->req_idx, dmamux->used_chans);  in rzn1_dmamux_free()
44 	struct platform_device *pdev = of_find_device_by_node(ofdma->of_node);  in rzn1_dmamux_route_allocate()
51 	if (dma_spec->args_count != RNZ1_DMAMUX_NCELLS)  in rzn1_dmamux_route_allocate()
52 		return ERR_PTR(-EINVAL);  in rzn1_dmamux_route_allocate()
56 		return ERR_PTR(-ENOMEM);  in rzn1_dmamux_route_allocate()
58 	chan = dma_spec->args[0];  in rzn1_dmamux_route_allocate()
59 	map->req_idx = dma_spec->args[4];  in rzn1_dmamux_route_allocate()
60 	val = dma_spec->args[5];  in rzn1_dmamux_route_allocate()
61 	dma_spec->args_count -= 2;  in rzn1_dmamux_route_allocate()
64 		dev_err(&pdev->dev, "Invalid DMA request line: %u\n", chan);  in rzn1_dmamux_route_allocate()
65 		ret = -EINVAL;  in rzn1_dmamux_route_allocate()
69 	if (map->req_idx >= RZN1_DMAMUX_MAX_LINES ||  in rzn1_dmamux_route_allocate()
70 	    (map->req_idx % RZN1_DMAMUX_LINES_PER_CTLR) != chan) {  in rzn1_dmamux_route_allocate()
71 		dev_err(&pdev->dev, "Invalid MUX request line: %u\n", map->req_idx);  in rzn1_dmamux_route_allocate()
72 		ret = -EINVAL;  in rzn1_dmamux_route_allocate()
76 	dmac_idx = map->req_idx >= RZN1_DMAMUX_LINES_PER_CTLR ? 1 : 0;  in rzn1_dmamux_route_allocate()
77 	dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", dmac_idx);  in rzn1_dmamux_route_allocate()
78 	if (!dma_spec->np) {  in rzn1_dmamux_route_allocate()
79 		dev_err(&pdev->dev, "Can't get DMA master\n");  in rzn1_dmamux_route_allocate()
80 		ret = -EINVAL;  in rzn1_dmamux_route_allocate()
84 	dev_dbg(&pdev->dev, "Mapping DMAMUX request %u to DMAC%u request %u\n",  in rzn1_dmamux_route_allocate()
85 		map->req_idx, dmac_idx, chan);  in rzn1_dmamux_route_allocate()
87 	if (test_and_set_bit(map->req_idx, dmamux->used_chans)) {  in rzn1_dmamux_route_allocate()
88 		ret = -EBUSY;  in rzn1_dmamux_route_allocate()
92 	mask = BIT(map->req_idx);  in rzn1_dmamux_route_allocate()
100 	clear_bit(map->req_idx, dmamux->used_chans);  in rzn1_dmamux_route_allocate()
109 	{ .compatible = "renesas,rzn1-dma" },
116 	struct device_node *mux_node = pdev->dev.of_node;  in rzn1_dmamux_probe()
121 	dmamux = devm_kzalloc(&pdev->dev, sizeof(*dmamux), GFP_KERNEL);  in rzn1_dmamux_probe()
123 		return -ENOMEM;  in rzn1_dmamux_probe()
125 	dmac_node = of_parse_phandle(mux_node, "dma-masters", 0);  in rzn1_dmamux_probe()
127 		return dev_err_probe(&pdev->dev, -ENODEV, "Can't get DMA master node\n");  in rzn1_dmamux_probe()
132 		return dev_err_probe(&pdev->dev, -EINVAL, "DMA master is not supported\n");  in rzn1_dmamux_probe()
134 	dmamux->dmarouter.dev = &pdev->dev;  in rzn1_dmamux_probe()
135 	dmamux->dmarouter.route_free = rzn1_dmamux_free;  in rzn1_dmamux_probe()
140 				      &dmamux->dmarouter);  in rzn1_dmamux_probe()
144 	{ .compatible = "renesas,rzn1-dmamux" },
151 		.name = "renesas,rzn1-dmamux",