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path: root/drivers/dma/shdma.h
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* dma: shdma: transfer based runtime PMGuennadi Liakhovetski2011-09-281-0/+7
| | | | | | | | | | | Currently the shdma dmaengine driver uses runtime PM to save power, when no channel on the specific controller is requested by a user. This patch switches the driver to count individual DMA transfers. That way the controller can be powered down between transfers, even if some of its channels are in use. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
* dmaengine: shdma: add chcr_ie_bitKuninori Morimoto2011-06-211-0/+1
| | | | | | | | IE bit position on CHCR register is not same in all DMAC. This patch adds new "chcr_ie_bit" to decide it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: add chcr_write/read functionKuninori Morimoto2011-06-211-0/+1
| | | | | | | | CHCR register position is not same in all DMAC. This patch adds new "chcr_offset" to decide it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: add to_sh_dev defineKuninori Morimoto2011-06-161-0/+2
| | | | | | | This patch adds "to_sh_dev" macro, and clean up codes. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: Update SH_DMAC_MAX_CHANNELS to 20Magnus Damm2011-05-251-1/+1
| | | | | | | | Update SH_DMAC_MAX_CHANNELS to support the 20 DMA channels included in the sh73a0 SY-DMAC hardware. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: add runtime- and system-level power managementGuennadi Liakhovetski2011-05-231-0/+1
| | | | | | | | | This patch extends and fixes runtime power management in the shdma driver to support powering down the DMA controller and adds support for system-level suspend and resume. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dma: shdma: NMI support.Paul Mundt2010-12-171-0/+1
| | | | | | | | | | Presently DMA transfers are interrupted and aborted by the NMI. This implements some basic logic for more gracefully handling and clearing each controller's NMIF flag via the NMI die chain, needed to resume transfers post-NMI. Reported-by: Michael Szafranek <Michael.Szafranek@emtrion.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: Introduce include/linux/sh_dma.hMagnus Damm2010-03-231-2/+1
| | | | | | | | | | | | | | | | | Create a common platform data header file for the shdma dmaengine driver. This is done by moving common structures from sh asm/dmaengine.h to linux/sh_dma.h. DMA registers are also copied from sh asm/dma-register.h to make the code architecture independent. The sh header file asm/dmaengine.h is still kept with the slave id enum. This allows us to keep the old processor specific code as is and slowly move over to slave id enums in per-processor headers. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: Common SH_DMA_SLAVE_NUMBERMagnus Damm2010-03-231-0/+1
| | | | | | | | | | | | | | Move SHDMA_SLAVE_NUMBER from asm/dmaengine.h to shdma.h. Set it to 256 to support a wide range of processors. The amount of memory consumed by this change is limited to 256 bits. While at it, rename to SH_DMA_SLAVE_NUMBER to match with the rest of the file. Signed-off-by: Magnus Damm <damm@opensource.se> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: extend .device_terminate_all() to record partial transferGuennadi Liakhovetski2010-03-021-16/+0
| | | | | | | | This patch extends the .device_terminate_all() method of the shdma driver to return number of bytes transfered in the current descriptor. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: separate DMA headers.Guennadi Liakhovetski2010-03-021-1/+3
| | | | | | | | | | Separate SH DMA headers into ones, commonly used by both drivers, and ones, specific to each of them. This will make the future development of the dmaengine driver easier. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* dmaengine: shdma: convert to platform device resourcesGuennadi Liakhovetski2010-03-021-1/+5
| | | | | | | | | | | The shdma dmaengine driver currently uses numerous macros to support various platforms, selected by ifdef's. Convert it to use platform device resources and lists of channel descriptors to specify register locations, interrupt numbers and other system-specific configuration variants. Unavoidably, we have to simultaneously convert all shdma users to provide those resources. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: implement DMA_SLAVE capability in SH dmaengine driverGuennadi Liakhovetski2010-02-081-5/+2
| | | | | | | | Tested to work with a SIU ASoC driver on sh7722 (migor). Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* sh: fix DMA driver's descriptor chaining and cookie assignmentGuennadi Liakhovetski2009-12-171-3/+6
| | | | | | | | | | | | | | | The SH DMA driver wrongly assigns negative cookies to transfer descriptors, also, its chaining of partial descriptors is broken. The latter problem is usually invisible, because maximum transfer size per chunk is 16M, but if you artificially set this limit lower, the driver fails. Since cookies are also used in chunk management, both these problems are fixed in one patch. As side effects a possible memory leak, when descriptors are prepared, but not submitted, and multiple races have also been fixed. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* sh: stylistic improvements for the DMA driverGuennadi Liakhovetski2009-12-101-7/+7
| | | | | Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dmaengine: sh: Add Support SuperH DMA Engine driverNobuhiro Iwamatsu2009-09-081-0/+64
This supported all DMA channels, and it was tested in SH7722, SH7780, SH7785 and SH7763. This can not use with SH DMA API. Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Reviewed-by: Matt Fleming <matt@console-pimps.org> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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