arch/blackfin/mach-bf538/dma.c

/*
 * File:         arch/blackfin/mach-bf538/dma.c
 * Based on:
 * Author:
 *
 * Created:
 * Description:  This file contains the simple DMA Implementation for Blackfin
 *
 * Modified:
 *               Copyright 2008 Analog Devices Inc.
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 *
 * 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.
 *
 * 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, see the file COPYING, or write
 * to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/module.h>

#include <asm/blackfin.h>
#include <asm/dma.h>

struct dma_register *dma_io_base_addr[MAX_DMA_CHANNELS] = {
	(struct dma_register *) DMA0_NEXT_DESC_PTR,
	(struct dma_register *) DMA1_NEXT_DESC_PTR,
	(struct dma_register *) DMA2_NEXT_DESC_PTR,
	(struct dma_register *) DMA3_NEXT_DESC_PTR,
	(struct dma_register *) DMA4_NEXT_DESC_PTR,
	(struct dma_register *) DMA5_NEXT_DESC_PTR,
	(struct dma_register *) DMA6_NEXT_DESC_PTR,
	(struct dma_register *) DMA7_NEXT_DESC_PTR,
	(struct dma_register *) DMA8_NEXT_DESC_PTR,
	(struct dma_register *) DMA9_NEXT_DESC_PTR,
	(struct dma_register *) DMA10_NEXT_DESC_PTR,
	(struct dma_register *) DMA11_NEXT_DESC_PTR,
	(struct dma_register *) DMA12_NEXT_DESC_PTR,
	(struct dma_register *) DMA13_NEXT_DESC_PTR,
	(struct dma_register *) DMA14_NEXT_DESC_PTR,
	(struct dma_register *) DMA15_NEXT_DESC_PTR,
	(struct dma_register *) DMA16_NEXT_DESC_PTR,
	(struct dma_register *) DMA17_NEXT_DESC_PTR,
	(struct dma_register *) DMA18_NEXT_DESC_PTR,
	(struct dma_register *) DMA19_NEXT_DESC_PTR,
	(struct dma_register *) MDMA0_D0_NEXT_DESC_PTR,
	(struct dma_register *) MDMA0_S0_NEXT_DESC_PTR,
	(struct dma_register *) MDMA0_D1_NEXT_DESC_PTR,
	(struct dma_register *) MDMA0_S1_NEXT_DESC_PTR,
	(struct dma_register *) MDMA1_D0_NEXT_DESC_PTR,
	(struct dma_register *) MDMA1_S0_NEXT_DESC_PTR,
	(struct dma_register *) MDMA1_D1_NEXT_DESC_PTR,
	(struct dma_register *) MDMA1_S1_NEXT_DESC_PTR,
};
EXPORT_SYMBOL(dma_io_base_addr);

int channel2irq(unsigned int channel)
{
	int ret_irq = -1;

	switch (channel) {
	case CH_PPI:
		ret_irq = IRQ_PPI;
		break;

	case CH_UART0_RX:
		ret_irq = IRQ_UART0_RX;
		break;

	case CH_UART0_TX:
		ret_irq = IRQ_UART0_TX;
		break;

	case CH_UART1_RX:
		ret_irq = IRQ_UART1_RX;
		break;

	case CH_UART1_TX:
		ret_irq = IRQ_UART1_TX;
		break;

	case CH_UART2_RX:
		ret_irq = IRQ_UART2_RX;
		break;

	case CH_UART2_TX:
		ret_irq = IRQ_UART2_TX;
		break;

	case CH_SPORT0_RX:
		ret_irq = IRQ_SPORT0_RX;
		break;

	case CH_SPORT0_TX:
		ret_irq = IRQ_SPORT0_TX;
		break;

	case CH_SPORT1_RX:
		ret_irq = IRQ_SPORT1_RX;
		break;

	case CH_SPORT1_TX:
		ret_irq = IRQ_SPORT1_TX;
		break;

	case CH_SPORT2_RX:
		ret_irq = IRQ_SPORT2_RX;
		break;

	case CH_SPORT2_TX:
		ret_irq = IRQ_SPORT2_TX;
		break;

	case CH_SPORT3_RX:
		ret_irq = IRQ_SPORT3_RX;
		break;

	case CH_SPORT3_TX:
		ret_irq = IRQ_SPORT3_TX;
		break;

	case CH_SPI0:
		ret_irq = IRQ_SPI0;
		break;

	case CH_SPI1:
		ret_irq = IRQ_SPI1;
		break;

	case CH_SPI2:
		ret_irq = IRQ_SPI2;
		break;

	case CH_MEM_STREAM0_SRC:
	case CH_MEM_STREAM0_DEST:
		ret_irq = IRQ_MEM0_DMA0;
		break;
	case CH_MEM_STREAM1_SRC:
	case CH_MEM_STREAM1_DEST:
		ret_irq = IRQ_MEM0_DMA1;
		break;
	case CH_MEM_STREAM2_SRC:
	case CH_MEM_STREAM2_DEST:
		ret_irq = IRQ_MEM1_DMA0;
		break;
	case CH_MEM_STREAM3_SRC:
	case CH_MEM_STREAM3_DEST:
		ret_irq = IRQ_MEM1_DMA1;
		break;
	}
	return ret_irq;
}