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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 as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* arch/arm/mach-ep93xx/dma.c
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*
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* Platform support code for the EP93xx dmaengine driver.
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*
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* Copyright (C) 2011 Mika Westerberg
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*
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* This work is based on the original dma-m2p implementation with
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* following copyrights:
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*
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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* Copyright (C) 2006 Applied Data Systems
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* Copyright (C) 2009 Ryan Mallon <rmallon@gmail.com>
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*/
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#include <linux/dmaengine.h>
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#include <linux/dma-mapping.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/platform_data/dma-ep93xx.h>
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#include "hardware.h"
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#include "soc.h"
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#define DMA_CHANNEL(_name, _base, _irq) \
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{ .name = (_name), .base = (_base), .irq = (_irq) }
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/*
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* DMA M2P channels.
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*
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* On the EP93xx chip the following peripherals my be allocated to the 10
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* Memory to Internal Peripheral (M2P) channels (5 transmit + 5 receive).
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*
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* I2S contains 3 Tx and 3 Rx DMA Channels
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* AAC contains 3 Tx and 3 Rx DMA Channels
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* UART1 contains 1 Tx and 1 Rx DMA Channels
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* UART2 contains 1 Tx and 1 Rx DMA Channels
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* UART3 contains 1 Tx and 1 Rx DMA Channels
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* IrDA contains 1 Tx and 1 Rx DMA Channels
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*
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* Registers are mapped statically in ep93xx_map_io().
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*/
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static struct ep93xx_dma_chan_data ep93xx_dma_m2p_channels[] = {
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DMA_CHANNEL("m2p0", EP93XX_DMA_BASE + 0x0000, IRQ_EP93XX_DMAM2P0),
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DMA_CHANNEL("m2p1", EP93XX_DMA_BASE + 0x0040, IRQ_EP93XX_DMAM2P1),
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DMA_CHANNEL("m2p2", EP93XX_DMA_BASE + 0x0080, IRQ_EP93XX_DMAM2P2),
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DMA_CHANNEL("m2p3", EP93XX_DMA_BASE + 0x00c0, IRQ_EP93XX_DMAM2P3),
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DMA_CHANNEL("m2p4", EP93XX_DMA_BASE + 0x0240, IRQ_EP93XX_DMAM2P4),
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DMA_CHANNEL("m2p5", EP93XX_DMA_BASE + 0x0200, IRQ_EP93XX_DMAM2P5),
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DMA_CHANNEL("m2p6", EP93XX_DMA_BASE + 0x02c0, IRQ_EP93XX_DMAM2P6),
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DMA_CHANNEL("m2p7", EP93XX_DMA_BASE + 0x0280, IRQ_EP93XX_DMAM2P7),
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DMA_CHANNEL("m2p8", EP93XX_DMA_BASE + 0x0340, IRQ_EP93XX_DMAM2P8),
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DMA_CHANNEL("m2p9", EP93XX_DMA_BASE + 0x0300, IRQ_EP93XX_DMAM2P9),
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};
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static struct ep93xx_dma_platform_data ep93xx_dma_m2p_data = {
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.channels = ep93xx_dma_m2p_channels,
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.num_channels = ARRAY_SIZE(ep93xx_dma_m2p_channels),
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};
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static u64 ep93xx_dma_m2p_mask = DMA_BIT_MASK(32);
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static struct platform_device ep93xx_dma_m2p_device = {
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.name = "ep93xx-dma-m2p",
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.id = -1,
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.dev = {
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.platform_data = &ep93xx_dma_m2p_data,
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.dma_mask = &ep93xx_dma_m2p_mask,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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},
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};
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/*
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* DMA M2M channels.
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*
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* There are 2 M2M channels which support memcpy/memset and in addition simple
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* hardware requests from/to SSP and IDE. We do not implement an external
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* hardware requests.
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*
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* Registers are mapped statically in ep93xx_map_io().
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*/
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static struct ep93xx_dma_chan_data ep93xx_dma_m2m_channels[] = {
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DMA_CHANNEL("m2m0", EP93XX_DMA_BASE + 0x0100, IRQ_EP93XX_DMAM2M0),
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DMA_CHANNEL("m2m1", EP93XX_DMA_BASE + 0x0140, IRQ_EP93XX_DMAM2M1),
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};
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static struct ep93xx_dma_platform_data ep93xx_dma_m2m_data = {
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.channels = ep93xx_dma_m2m_channels,
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.num_channels = ARRAY_SIZE(ep93xx_dma_m2m_channels),
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};
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static u64 ep93xx_dma_m2m_mask = DMA_BIT_MASK(32);
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static struct platform_device ep93xx_dma_m2m_device = {
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.name = "ep93xx-dma-m2m",
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.id = -1,
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.dev = {
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.platform_data = &ep93xx_dma_m2m_data,
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.dma_mask = &ep93xx_dma_m2m_mask,
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.coherent_dma_mask = DMA_BIT_MASK(32),
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},
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};
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static int __init ep93xx_dma_init(void)
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{
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platform_device_register(&ep93xx_dma_m2p_device);
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platform_device_register(&ep93xx_dma_m2m_device);
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return 0;
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}
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arch_initcall(ep93xx_dma_init);
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