Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit de5d4453 authored by Richard Röjfors's avatar Richard Röjfors Committed by Dan Williams
Browse files

dma: Add timb-dma 



Adds the support for the DMA engine withing the timberdale FPGA.

The DMA channels are strict device to host, or host to device
and can not be used for generic memcpy.

Signed-off-by: default avatarRichard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 84c8447c

drivers/dma/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -149,6 +149,13 @@ config AMCC_PPC440SPE_ADMA 
	help

	  Enable support for the AMCC PPC440SPe RAID engines.



config TIMB_DMA

	tristate "Timberdale FPGA DMA support"

	depends on MFD_TIMBERDALE || HAS_IOMEM

	select DMA_ENGINE

	help

	  Enable support for the Timberdale FPGA DMA engine.



config ARCH_HAS_ASYNC_TX_FIND_CHANNEL

	bool

drivers/dma/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -20,3 +20,4 @@ obj-$(CONFIG_TXX9_DMAC) += txx9dmac.o 
obj-$(CONFIG_SH_DMAE) += shdma.o

obj-$(CONFIG_COH901318) += coh901318.o coh901318_lli.o

obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/

obj-$(CONFIG_TIMB_DMA) += timb_dma.o

drivers/dma/timb_dma.c

0 → 100644
+853 −0

File added.

Preview size limit exceeded, changes collapsed.

include/linux/timb_dma.h

0 → 100644
+55 −0
Original line number Diff line number Diff line 
/*

 * timb_dma.h timberdale FPGA DMA driver defines

 * Copyright (c) 2010 Intel Corporation

 *

 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.

 */



/* Supports:

 * Timberdale FPGA DMA engine

 */



#ifndef _LINUX_TIMB_DMA_H

#define _LINUX_TIMB_DMA_H



/**

 * struct timb_dma_platform_data_channel - Description of each individual

 *	DMA channel for the timberdale DMA driver

 * @rx:			true if this channel handles data in the direction to

 *	the CPU.

 * @bytes_per_line:	Number of bytes per line, this is specific for channels

 *	handling video data. For other channels this shall be left to 0.

 * @descriptors:	Number of descriptors to allocate for this channel.

 * @descriptor_elements: Number of elements in each descriptor.

 *

 */

struct timb_dma_platform_data_channel {

	bool rx;

	unsigned int bytes_per_line;

	unsigned int descriptors;

	unsigned int descriptor_elements;

};



/**

 * struct timb_dma_platform_data - Platform data of the timberdale DMA driver

 * @nr_channels:	Number of defined channels in the channels array.

 * @channels:		Definition of the each channel.

 *

 */

struct timb_dma_platform_data {

	unsigned nr_channels;

	struct timb_dma_platform_data_channel channels[32];

};



#endif