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2015-01-17staging: comedi: das16: introduce das16_isadma_disable()H Hartley Sweeten
Introduce a helper function to disable and the ISA DMA controller and return the residue as described in Documentation/DMA-ISA-LPC.txt. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das16: introduce das16_isadma_program()H Hartley Sweeten
Introduce a helper function to program the ISA DMA controller. Program the ISA DMA as described in Documentation/DMA-ISA-LPC.txt. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das16: move dma transfer 'size' to dma descriptorH Hartley Sweeten
For asethetics, move the variable that holds the dma transfer 'size' into the dma descriptor. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: introduce das1800_isadma_disable()H Hartley Sweeten
Introduce a helper function to disable and the ISA DMA controller and return the residue as described in Documentation/DMA-ISA-LPC.txt. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: introduce das1800_isadma_program()H Hartley Sweeten
Introduce a helper function to program the ISA DMA controller. Program the ISA DMA as described in Documentation/DMA-ISA-LPC.txt. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: move dma transfer 'size' to dma descriptorH Hartley Sweeten
For asethetics, move the variable that holds the dma transfer 'size' into the dma descriptor. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: pass dma descriptor to das1800_flush_dma_channel()H Hartley Sweeten
Instead of passing the dma descriptor 'chan' and 'virt_addr' just pass the dma descriptor. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: dt282x: introduce dt282x_isadma_disable()H Hartley Sweeten
According to Documentation/DMA-ISA-LPC.txt, the DMA lock needs to be claimed before using any of the ISA DMA routines. Introduce a helper function to disable the ISA DMA controller and add the necessary locking calls. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: dt282x: introduce dt282x_isadma_program()H Hartley Sweeten
Introduce a helper function to program the ISA DMA controller. Program the ISA DMA as described in Documentation/DMA-ISA-LPC.txt. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl816: introduce pcl816_isadma_disable()H Hartley Sweeten
According to Documentation/DMA-ISA-LPC.txt, the DMA lock needs to be claimed before using any of the ISA DMA routines. Introduce a helper function to disable the ISA DMA controller and add the necessary locking calls. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl816: introduce pcl816_isadma_program()H Hartley Sweeten
Introduce a helper function to program the ISA DMA controller. Program the ISA DMA as described in Documentation/DMA-ISA-LPC.txt. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl818: introduce pcl818_isadma_disable()H Hartley Sweeten
According to Documentation/DMA-ISA-LPC.txt, the DMA lock needs to be claimed before using any of the ISA DMA routines. Introduce a helper function to disable the ISA DMA controller and add the necessary locking calls. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl818: introduce pcl818_isadma_program()H Hartley Sweeten
Introduce a helper function to program the ISA DMA controller. Program the ISA DMA as described in Documentation/DMA-ISA-LPC.txt. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das16: board is not a PCI deviceH Hartley Sweeten
The DAS16 board is an ISA device not a PCI device. For aesthetics, use dma_{alloc,free}_coherent() to allocate and free the DMA buffers instead of the PCI versions. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das16: introduce das16_free_dma()H Hartley Sweeten
For aesthetics, move the freeing of the DMA channel and the buffers to a helper function. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das16 introduce das16_alloc_dma()H Hartley Sweeten
DMA is optional with this driver. Introduce a helper function to request the DMA channel and allocate the buffers. Don't fail the driver attach if the user passed an invalid DMA channel or the channel cannot be requested. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das16: introduce struct das16_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: dt282x: remove VIRT_TO_BUS dependancyH Hartley Sweeten
Use dma_{alloc,free}_coherent() to allocate and free the DMA buffers. This removes the dependancy on VIRT_TO_BUS. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: dt282x: introduce struct dt282x_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: dt282x: introduce dt282x_alloc_dma()H Hartley Sweeten
The IRA and DMA are optional with this driver but both are required to support async commands. Introduce a helper function to request the IRQ and DMA channel and allocate the buffers. Don't fail the driver attach if the user passed an invalid IRQ or DMA channel or they cannot be requested. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl812: remove VIRT_TO_BUS dependancyH Hartley Sweeten
Use dma_{alloc,free}_coherent() to allocate and free the DMA buffers. This removes the dependancy on VIRT_TO_BUS. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl812: introduce struct pcl812_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl812: introduce pcl812_free_dma()H Hartley Sweeten
For aesthetics, move the freeing of the DMA channel and the buffers to a helper function. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl812: introduce pcl812_alloc_dma()H Hartley Sweeten
DMA is optional with this driver. Introduce a helper function to request the DMA channel and allocate the buffers. Don't fail the driver attach if the user passed an invalid DMA channel or the channel cannot be requested. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl816: fix short DMA transactionsH Hartley Sweeten
When the cmd->stop_src == TRIG_COUNT the last DMA transfer might be smaller than the buffer size. This results in invalid data being added to the async buffer. Add a 'size' member to the DMA descriptor and initialize it with the actual size of the DMA transfer. Use that in interrupt and ai subdevice (*poll) function to return the proper number of samples. Use the comedi_bytes_to_samples() helper to convert the byte size to comedi samples in the interrupt handler. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl816: remove VIRT_TO_BUS dependancyH Hartley Sweeten
Use dma_{alloc,free}_coherent() to allocate and free the DMA buffers. This removes the dependancy on VIRT_TO_BUS. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl816: introduce struct pcl816_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl816: introduce pcl816_free_dma()H Hartley Sweeten
For aesthetics, move the freeing of the DMA channel and the buffers to a helper function. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl816: introduce pcl816_alloc_dma()H Hartley Sweeten
The IRA and DMA are optional with this driver but both are required to support async commands. Introduce a helper function to request the IRQ and DMA channel and allocate the buffers. Don't fail the driver attach if the user passed an invalid IRQ or DMA channel or they cannot be requested. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl818: fix pcl818_handle_dma() for short DMA transactionH Hartley Sweeten
Currently this function always transfers the full DMA buffer to the comedi async buffer. When the cmd->stop_src == TRIG_COUNT the last DMA transfer might be smaller than the buffer size. This results in invalid data being added to the asunc buffer. Add a 'size' member to the DMA descriptor and initialize it with the actual size of the DMA transfer. Use that in pcl818_handle_dma() to return the proper number of samples. Use the comedi_bytes_to_samples() helper to convert the byte size to comedi samples. Remove the unnecessary 'bufptr' local variable. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl818: remove VIRT_TO_BUS dependancyH Hartley Sweeten
Use dma_{alloc,free}_coherent() to allocate and free the DMA buffers. This removes the dependancy on VIRT_TO_BUS. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl818: introduce struct pcl818_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl818: introduce pcl818_dma_free()H Hartley Sweeten
For aesthetics, move the freeing of the DMA channel and the buffers to a helper function. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: pcl818: introduce pcl818_alloc_dma()H Hartley Sweeten
DMA is optional with this driver. Introduce a helper function to request the DMA channel and allocate the buffers. Don't fail the driver attach if the user passed an invalid DMA channel or the channel cannot be requested. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_labpc: remove VIRT_TO_BUS dependancyH Hartley Sweeten
Use dma_{alloc,free}_coherent() to allocate and free the DMA buffers. This removes the dependancy on VIRT_TO_BUS. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_labpc_isadma: tidy up labpc_init_dma_chan()H Hartley Sweeten
DMA support is optional for the labpc driver. The return value from labpc_init_dma_chan() is not even checked by the caller. Change the return type to void and tidy up the function a bit. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_labpc: introduce struct labpc_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_at_a2150: remove VIRT_TO_BUS dependancyH Hartley Sweeten
Use dma_{alloc,free}_coherent() to allocate and free the DMA buffers. This removes the dependancy on VIRT_TO_BUS. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_at_a2150: introduce struct a2150_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_at_a2150: introduce a2150_free_dma()H Hartley Sweeten
For aesthetics, introduce a helper function to free the DMA channel and buffer. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_at_a2150: introduce a2150_alloc_irq_dma()H Hartley Sweeten
This driver requires an IRQ and DMA in order to support async commands. For aesthetics, introduce a helper function to request the IRQ and DMA channels and allocate the DMA buffer. Since the async command support is optional, make the helper function handle any request/allocation errors and allow the driver to still attach without async command support. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_at_a2150: use comedi_bytes_per_sample()H Hartley Sweeten
For aesthetics, use the helper function to get the byte size of each sample instead of using sizeof() the first buffer element. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: ni_at_a2150: remove 'volatile' from private data variableH Hartley Sweeten
As indicated by checkpatch.pl, "WARNING: Use of volatile is usually wrong: ...", the 'count' member of the private data does not need to be volatile. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: introduce das1800_free_dma()H Hartley Sweeten
For aesthetics, introduce a helper function to free the DMA channels and allocated buffers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: remove VIRT_TO_BUS dependancyH Hartley Sweeten
Use dma_{alloc,free}_coherent() to allocate and free the DMA buffers. This removes the dependancy on VIRT_TO_BUS. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: tidy up das1800_init_dma()H Hartley Sweeten
Refactor this function so that a for loop can be used to request and set up the two DMA descriptors. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: introduce struct das1800_dma_descH Hartley Sweeten
For aesthetics, introduce a struct to hold the DMA descriptor data. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: separate AI FIFO bounce buffer from DMA bufferH Hartley Sweeten
This driver can use DMA or the hardware FIFO to read analog input samples. When DMA is enabled it's also possible for some async commands to cause DMA to be disabled and the FIFO is used instead. Currently the first DMA channels buffer is used for the bounce buffer when using the FIFO. For aesthetics, add a new member to the private data and use that for the FIFO bounce buffer. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: das1800: reduce indent level of das1800_init_dma()H Hartley Sweeten
An IRQ and at least one DMA channel are required to use DMA with this driver. Move the check to the caller to reduce the indent level of this function. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-17staging: comedi: adl_pci9118: remove VIRT_TO_BUS dependancyH Hartley Sweeten
This driver no longer uses virt_to_bus(). Remove the dependancy. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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