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4505153954
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 136 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190530000436.384967451@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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*
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* Copyright (C) 2011 John Crispin <john@phrozen.org>
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*/
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#ifndef LTQ_DMA_H__
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#define LTQ_DMA_H__
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#define LTQ_DESC_SIZE 0x08 /* each descriptor is 64bit */
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#define LTQ_DESC_NUM 0x40 /* 64 descriptors / channel */
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#define LTQ_DMA_OWN BIT(31) /* owner bit */
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#define LTQ_DMA_C BIT(30) /* complete bit */
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#define LTQ_DMA_SOP BIT(29) /* start of packet */
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#define LTQ_DMA_EOP BIT(28) /* end of packet */
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#define LTQ_DMA_TX_OFFSET(x) ((x & 0x1f) << 23) /* data bytes offset */
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#define LTQ_DMA_RX_OFFSET(x) ((x & 0x7) << 23) /* data bytes offset */
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#define LTQ_DMA_SIZE_MASK (0xffff) /* the size field is 16 bit */
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struct ltq_dma_desc {
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u32 ctl;
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u32 addr;
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};
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struct ltq_dma_channel {
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int nr; /* the channel number */
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int irq; /* the mapped irq */
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int desc; /* the current descriptor */
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struct ltq_dma_desc *desc_base; /* the descriptor base */
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int phys; /* physical addr */
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struct device *dev;
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};
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enum {
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DMA_PORT_ETOP = 0,
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DMA_PORT_DEU,
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};
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extern void ltq_dma_enable_irq(struct ltq_dma_channel *ch);
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extern void ltq_dma_disable_irq(struct ltq_dma_channel *ch);
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extern void ltq_dma_ack_irq(struct ltq_dma_channel *ch);
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extern void ltq_dma_open(struct ltq_dma_channel *ch);
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extern void ltq_dma_close(struct ltq_dma_channel *ch);
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extern void ltq_dma_alloc_tx(struct ltq_dma_channel *ch);
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extern void ltq_dma_alloc_rx(struct ltq_dma_channel *ch);
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extern void ltq_dma_free(struct ltq_dma_channel *ch);
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extern void ltq_dma_init_port(int p);
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#endif
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