1 // SPDX-License-Identifier: GPL-2.0
3  * Platform driver for the Synopsys DesignWare DMA Controller
5  * Copyright (C) 2007-2008 Atmel Corporation
6  * Copyright (C) 2010-2011 ST Microelectronics
19 	struct dw_dma *dw = ofdma->of_dma_data;  in dw_dma_of_xlate()
21 		.dma_dev = dw->dma.dev,  in dw_dma_of_xlate()
25 	if (dma_spec->args_count < 3 || dma_spec->args_count > 4)  in dw_dma_of_xlate()
28 	slave.src_id = dma_spec->args[0];  in dw_dma_of_xlate()
29 	slave.dst_id = dma_spec->args[0];  in dw_dma_of_xlate()
30 	slave.m_master = dma_spec->args[1];  in dw_dma_of_xlate()
31 	slave.p_master = dma_spec->args[2];  in dw_dma_of_xlate()
32 	if (dma_spec->args_count >= 4)  in dw_dma_of_xlate()
33 		slave.channels = dma_spec->args[3];  in dw_dma_of_xlate()
37 		    slave.m_master >= dw->pdata->nr_masters ||  in dw_dma_of_xlate()
38 		    slave.p_master >= dw->pdata->nr_masters ||  in dw_dma_of_xlate()
39 		    slave.channels >= BIT(dw->pdata->nr_channels)))  in dw_dma_of_xlate()
51 	struct device_node *np = pdev->dev.of_node;  in dw_dma_parse_dt()
58 		dev_err(&pdev->dev, "Missing DT data\n");  in dw_dma_parse_dt()
62 	if (of_property_read_u32(np, "dma-masters", &nr_masters))  in dw_dma_parse_dt()
67 	if (of_property_read_u32(np, "dma-channels", &nr_channels))  in dw_dma_parse_dt()
72 	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);  in dw_dma_parse_dt()
76 	pdata->nr_masters = nr_masters;  in dw_dma_parse_dt()
77 	pdata->nr_channels = nr_channels;  in dw_dma_parse_dt()
80 		pdata->chan_allocation_order = (unsigned char)tmp;  in dw_dma_parse_dt()
83 		pdata->chan_priority = tmp;  in dw_dma_parse_dt()
86 		pdata->block_size = tmp;  in dw_dma_parse_dt()
88 	if (!of_property_read_u32_array(np, "data-width", arr, nr_masters)) {  in dw_dma_parse_dt()
90 			pdata->data_width[tmp] = arr[tmp];  in dw_dma_parse_dt()
93 			pdata->data_width[tmp] = BIT(arr[tmp] & 0x07);  in dw_dma_parse_dt()
96 	if (!of_property_read_u32_array(np, "multi-block", mb, nr_channels)) {  in dw_dma_parse_dt()
98 			pdata->multi_block[tmp] = mb[tmp];  in dw_dma_parse_dt()
101 			pdata->multi_block[tmp] = 1;  in dw_dma_parse_dt()
104 	if (of_property_read_u32_array(np, "snps,max-burst-len", pdata->max_burst,  in dw_dma_parse_dt()
106 		memset32(pdata->max_burst, DW_DMA_MAX_BURST, nr_channels);  in dw_dma_parse_dt()
109 	if (!of_property_read_u32(np, "snps,dma-protection-control", &tmp)) {  in dw_dma_parse_dt()
112 		pdata->protctl = tmp;  in dw_dma_parse_dt()
120 	struct device *dev = dw->dma.dev;  in dw_dma_of_controller_register()
123 	if (!dev->of_node)  in dw_dma_of_controller_register()
126 	ret = of_dma_controller_register(dev->of_node, dw_dma_of_xlate, dw);  in dw_dma_of_controller_register()
133 	struct device *dev = dw->dma.dev;  in dw_dma_of_controller_free()
135 	if (!dev->of_node)  in dw_dma_of_controller_free()
138 	of_dma_controller_free(dev->of_node);  in dw_dma_of_controller_free()