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add dmaengine based s3c24xx dma driver

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Merge tag 's3c24xx-dma' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers

From Kukjin Kim, this branch adds device-tree support to the DMA controller
on the older Samsung SoCs. It also adds support for one of the missing SoCs
in the family (2410).

The driver has been Ack:ed by Vinod Koul, but is merged through here due
to dependencies with platform code.

* tag 's3c24xx-dma' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: S3C24XX: add dma pdata for s3c2410, s3c2440 and s3c2442
  dmaengine: s3c24xx-dma: add support for the s3c2410 type of controller
  ARM: S3C24XX: Fix possible dma selection warning
  ARM: SAMSUNG: set s3c24xx_dma_filter for s3c64xx-spi0 device
  ARM: S3C24XX: add platform-devices for new dma driver for s3c2412 and s3c2443
  dmaengine: add driver for Samsung s3c24xx SoCs
  ARM: S3C24XX: number the dma clocks
  + Linux 3.12-rc3

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2013-10-27 21:42:44 -07:00
commit 3316dee245
246 changed files with 3994 additions and 1263 deletions
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46
include/linux/platform_data/dma-s3c24xx.h Normal file
View file

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/*
* S3C24XX DMA handling
*
* Copyright (c) 2013 Heiko Stuebner <heiko@sntech.de>
*
* 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.
*/
/* Helper to encode the source selection constraints for early s3c socs. */
#define S3C24XX_DMA_CHANREQ(src, chan) ((BIT(3) | src) << chan * 4)
enum s3c24xx_dma_bus {
S3C24XX_DMA_APB,
S3C24XX_DMA_AHB,
};
/**
* @bus: on which bus does the peripheral reside - AHB or APB.
* @handshake: is a handshake with the peripheral necessary
* @chansel: channel selection information, depending on variant; reqsel for
* s3c2443 and later and channel-selection map for earlier SoCs
* see CHANSEL doc in s3c2443-dma.c
*/
struct s3c24xx_dma_channel {
enum s3c24xx_dma_bus bus;
bool handshake;
u16 chansel;
};
/**
* struct s3c24xx_dma_platdata - platform specific settings
* @num_phy_channels: number of physical channels
* @channels: array of virtual channel descriptions
* @num_channels: number of virtual channels
*/
struct s3c24xx_dma_platdata {
int num_phy_channels;
struct s3c24xx_dma_channel *channels;
int num_channels;
};
struct dma_chan;
bool s3c24xx_dma_filter(struct dma_chan *chan, void *param);