src/platform/haswell/dma.c

/*
 * Copyright (c) 2016, Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of the Intel Corporation nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
 */

#include <sof/dma.h>
#include <sof/dw-dma.h>
#include <platform/memory.h>
#include <platform/interrupt.h>
#include <platform/dma.h>
#include <stdint.h>
#include <string.h>

static struct dw_drv_plat_data dmac0 = {
	.chan[0] = {
		.class	= 6,
		.weight = 0,
	},
	.chan[1] = {
		.class	= 6,
		.weight = 0,
	},
	.chan[2] = {
		.class	= 6,
		.weight = 0,
	},
	.chan[3] = {
		.class	= 6,
		.weight = 0,
	},
	.chan[4] = {
		.class	= 6,
		.weight = 0,
	},
	.chan[5] = {
		.class	= 6,
		.weight = 0,
	},
	.chan[6] = {
		.class	= 6,
		.weight = 0,
	},
	.chan[7] = {
		.class	= 6,
		.weight = 0,
	},
};

static struct dw_drv_plat_data dmac1 = {
	.chan[0] = {
		.class	= 7,
		.weight = 0,
	},
	.chan[1] = {
		.class	= 7,
		.weight = 0,
	},
	.chan[2] = {
		.class	= 7,
		.weight = 0,
	},
	.chan[3] = {
		.class	= 7,
		.weight = 0,
	},
	.chan[4] = {
		.class	= 7,
		.weight = 0,
	},
	.chan[5] = {
		.class	= 7,
		.weight = 0,
	},
	.chan[6] = {
		.class	= 7,
		.weight = 0,
	},
	.chan[7] = {
		.class	= 7,
		.weight = 0,
	},
};

struct dma dma[PLATFORM_NUM_DMACS] = {
{
	.plat_data = {
		.base		= DMA0_BASE,
		.dir		= DMA_DIR_MEM_TO_MEM,
		.caps		= DMA_CAP_GP_HP | DMA_CAP_GP_LP,
		.devs		= DMA_DEV_SSP | DMA_DEV_DMIC | DMA_DEV_HOST,
		.irq		= IRQ_NUM_EXT_DMAC0,
		.drv_plat_data	= &dmac0,
	},
	.ops		= &dw_dma_ops,
},
{
	.plat_data = {
		.base		= DMA1_BASE,
		.dir		= DMA_DIR_MEM_TO_MEM | DMA_DIR_MEM_TO_DEV |
				  DMA_DIR_DEV_TO_MEM | DMA_DIR_DEV_TO_DEV |
				  DMA_DIR_HMEM_TO_LMEM | DMA_DIR_LMEM_TO_HMEM,
		.caps		= DMA_CAP_GP_HP | DMA_CAP_GP_LP,
		.devs		= DMA_DEV_SSP | DMA_DEV_DMIC | DMA_DEV_HOST,
		.irq		= IRQ_NUM_EXT_DMAC1,
		.drv_plat_data	= &dmac1,
	},
	.ops		= &dw_dma_ops,
},};

/* Initialize all platform DMAC's */
int dmac_init(void)
{
	int i, ret;

	for (i = 0; i < ARRAY_SIZE(dma); i++) {
		ret = dma_probe(&dma[i]);
		if (ret < 0) {

			/* trace failed DMAC ID */
			trace_error(TRACE_CLASS_DMA, "edi");
			trace_error_value(dma[i].plat_data.id);
			return ret;
		}
	}

	/* clear the masks for dsp of the dmacs */
	io_reg_update_bits(SHIM_BASE + SHIM_IMRD,
			   SHIM_IMRD_DMAC0, 0);

	io_reg_update_bits(SHIM_BASE + SHIM_IMRD,
			   SHIM_IMRD_DMAC1, 0);

	return 0;
}