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introduce xlnx-dpdma

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This is the implementation of the DPDMA.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Tested-By: Hyun Kwon <hyun.kwon@xilinx.com>
Message-id: 1465833014-21982-8-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
KONRAD Frederic 2016-06-14 15:59:15 +01:00 • committed by Peter Maydell
parent 78c71af804
commit d3c6369a96
3 changed files with 872 additions and 0 deletions
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85
include/hw/dma/xlnx_dpdma.h Normal file
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/*
* xlnx_dpdma.h
*
* Copyright (C) 2015 : GreenSocs Ltd
* http://www.greensocs.com/ , email: info@greensocs.com
*
* Developed by :
* Frederic Konrad <fred.konrad@greensocs.com>
*
* 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 <http://www.gnu.org/licenses/>.
*
*/
#ifndef XLNX_DPDMA_H
#define XLNX_DPDMA_H
#include "hw/sysbus.h"
#include "ui/console.h"
#include "sysemu/dma.h"
#define XLNX_DPDMA_REG_ARRAY_SIZE (0x1000 >> 2)
struct XlnxDPDMAState {
/*< private >*/
SysBusDevice parent_obj;
/*< public >*/
MemoryRegion iomem;
uint32_t registers[XLNX_DPDMA_REG_ARRAY_SIZE];
uint8_t *data[6];
bool operation_finished[6];
qemu_irq irq;
};
typedef struct XlnxDPDMAState XlnxDPDMAState;
#define TYPE_XLNX_DPDMA "xlnx.dpdma"
#define XLNX_DPDMA(obj) OBJECT_CHECK(XlnxDPDMAState, (obj), TYPE_XLNX_DPDMA)
/*
* xlnx_dpdma_start_operation: Start the operation on the specified channel. The
* DPDMA gets the current descriptor and retrieves
* data to the buffer specified by
* dpdma_set_host_data_location().
*
* Returns The number of bytes transfered by the DPDMA or 0 if an error occured.
*
* @s The DPDMA state.
* @channel The channel to start.
*/
size_t xlnx_dpdma_start_operation(XlnxDPDMAState *s, uint8_t channel,
bool one_desc);
/*
* xlnx_dpdma_set_host_data_location: Set the location in the host memory where
* to store the data out from the dma
* channel.
*
* @s The DPDMA state.
* @channel The channel associated to the pointer.
* @p The buffer where to store the data.
*/
/* XXX: add a maximum size arg and send an interrupt in case of overflow. */
void xlnx_dpdma_set_host_data_location(XlnxDPDMAState *s, uint8_t channel,
void *p);
/*
* xlnx_dpdma_trigger_vsync_irq: Trigger a VSYNC IRQ when the display is
* updated.
*
* @s The DPDMA state.
*/
void xlnx_dpdma_trigger_vsync_irq(XlnxDPDMAState *s);
#endif /* !XLNX_DPDMA_H */