1 // SPDX-License-Identifier: GPL-2.0-only
10 #include <linux/dma-mapping.h>
45 #define DMA_PCTRL_4W_BURST	0x2		/* 4 word burst length */
47 #define DMA_TX_BURST_SHIFT	4		/* tx burst shift */
61 ltq_dma_enable_irq(struct ltq_dma_channel *ch)  in ltq_dma_enable_irq()  argument
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()
73 ltq_dma_disable_irq(struct ltq_dma_channel *ch)  in ltq_dma_disable_irq()  argument
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()
85 ltq_dma_ack_irq(struct ltq_dma_channel *ch)  in ltq_dma_ack_irq()  argument
90 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_ack_irq()
97 ltq_dma_open(struct ltq_dma_channel *ch)  in ltq_dma_open()  argument
102 	ltq_dma_w32(ch->nr, LTQ_DMA_CS);  in ltq_dma_open()
109 ltq_dma_close(struct ltq_dma_channel *ch)  in ltq_dma_close()  argument
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()
122 ltq_dma_alloc(struct ltq_dma_channel *ch)  in ltq_dma_alloc()  argument
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()
144 ltq_dma_alloc_tx(struct ltq_dma_channel *ch)  in ltq_dma_alloc_tx()  argument
148 	ltq_dma_alloc(ch);  in ltq_dma_alloc_tx()
152 	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);  in ltq_dma_alloc_tx()
159 ltq_dma_alloc_rx(struct ltq_dma_channel *ch)  in ltq_dma_alloc_rx()  argument
163 	ltq_dma_alloc(ch);  in ltq_dma_alloc_rx()
167 	ltq_dma_w32_mask(0, 1 << ch->nr, LTQ_DMA_IRNEN);  in ltq_dma_alloc_rx()
174 ltq_dma_free(struct ltq_dma_channel *ch)  in ltq_dma_free()  argument
176 	if (!ch->desc_base)  in ltq_dma_free()
178 	ltq_dma_close(ch);  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()
207 	case 4:  in ltq_dma_init_port()
224 	case 4:  in ltq_dma_init_port()
247 	ltq_dma_membase = devm_ioremap_resource(&pdev->dev, res);  in ltq_dma_init()
252 	clk = clk_get(&pdev->dev, NULL);  in ltq_dma_init()
274 	dev_info(&pdev->dev,  in ltq_dma_init()
275 		"Init done - hw rev: %X, ports: %d, channels: %d\n",  in ltq_dma_init()
282 	{ .compatible = "lantiq,dma-xway" },
289 		.name = "dma-xway",