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

Commit dc78baa2 authored by Nicolas Ferre's avatar Nicolas Ferre Committed by Dan Williams
Browse files

dmaengine: at_hdmac: new driver for the Atmel AHB DMA Controller 

This AHB DMA Controller (aka HDMA or DMAC on AT91 systems) is availlable on
at91sam9rl chip. It will be used on other products in the future.

This first release covers only the memory-to-memory tranfer type. This is the
only tranfer type supported by this chip.  On other products, it will be used
also for peripheral DMA transfer (slave API support to come).

I used dmatest client without problem in different configurations to test it.

Full documentation for this controller can be found in the SAM9RL datasheet:
http://www.atmel.com/dyn/products/product_card.asp?part_id=4243



Signed-off-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: default avatarMaciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent f1aef8b6

arch/arm/mach-at91/include/mach/at_hdmac.h

0 → 100644
+26 −0
Original line number Diff line number Diff line 
/*

 * Header file for the Atmel AHB DMA Controller driver

 *

 * Copyright (C) 2008 Atmel Corporation

 *

 * 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.

 */

#ifndef AT_HDMAC_H

#define AT_HDMAC_H



#include <linux/dmaengine.h>



/**

 * struct at_dma_platform_data - Controller configuration parameters

 * @nr_channels: Number of channels supported by hardware (max 8)

 * @cap_mask: dma_capability flags supported by the platform

 */

struct at_dma_platform_data {

	unsigned int	nr_channels;

	dma_cap_mask_t  cap_mask;

};



#endif /* AT_HDMAC_H */

drivers/dma/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -46,6 +46,14 @@ config DW_DMAC 
	  Support the Synopsys DesignWare AHB DMA controller.  This

	  can be integrated in chips such as the Atmel AT32ap7000.



config AT_HDMAC

	tristate "Atmel AHB DMA support"

	depends on ARCH_AT91SAM9RL

	select DMA_ENGINE

	help

	  Support the Atmel AHB DMA controller.  This can be integrated in

	  chips such as the Atmel AT91SAM9RL.



config FSL_DMA

	tristate "Freescale Elo and Elo Plus DMA support"

	depends on FSL_SOC

drivers/dma/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -7,4 +7,5 @@ obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o 
obj-$(CONFIG_FSL_DMA) += fsldma.o

obj-$(CONFIG_MV_XOR) += mv_xor.o

obj-$(CONFIG_DW_DMAC) += dw_dmac.o

obj-$(CONFIG_AT_HDMAC) += at_hdmac.o

obj-$(CONFIG_MX3_IPU) += ipu/