lantiq/xway/dma.c

1 // SPDX-License-Identifier: GPL-2.0-only
10 #include <linux/dma-mapping.h>
49 #define DMA_ETOP_ENDIANNESS	(0xf << 8) /* endianness swap etop channels */
66 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_enable_irq()
67 	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);  in ltq_dma_enable_irq()
78 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_disable_irq()
79 	ltq_dma_w32_mask(1 << ch->nr, 0, LTQ_DMA_IRNEN);  in ltq_dma_disable_irq()
90 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_ack_irq()
102 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_open()
114 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_close()
116 	ltq_dma_w32_mask(1 << ch->nr, 0, LTQ_DMA_IRNEN);  in ltq_dma_close()
126 	ch->desc = 0;  in ltq_dma_alloc()
127 	ch->desc_base = dma_alloc_coherent(ch->dev,  in ltq_dma_alloc()
129 					   &ch->phys, GFP_ATOMIC);  in ltq_dma_alloc()
132 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_alloc()
133 	ltq_dma_w32(ch->phys, LTQ_DMA_CDBA);  in ltq_dma_alloc()
152 	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);  in ltq_dma_alloc_tx()
167 	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);  in ltq_dma_alloc_rx()
176 	if (!ch->desc_base)  in ltq_dma_free()
179 	dma_free_coherent(ch->dev, LTQ_DESC_NUM * LTQ_DESC_SIZE,  in ltq_dma_free()
180 		ch->desc_base, ch->phys);  in ltq_dma_free()
250 	clk = clk_get(&pdev->dev, NULL);  in ltq_dma_init()
272 	dev_info(&pdev->dev,  in ltq_dma_init()
273 		"Init done - hw rev: %X, ports: %d, channels: %d\n",  in ltq_dma_init()
280 	{ .compatible = "lantiq,dma-xway" },
287 		.name = "dma-xway",