This function is only called during the attach of the driver and it's
called after the private data has been kzalloc'd. There is no reason
to clear any of the private data members.
Simplify the function by just writing '0' to the necessary registers
to disable all the interrupt sources and stop the timers.
For aesthetics, change the return type to void.
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>
Move the common code used to initialize DMA to apci3120_init_dma().
This follows the programming procedure described in the APCI-3120
documentation.
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>
Use the defines for the AMCC 5933 PCI controller registers and bits instead
of creating private defines in this driver.
Move the generic AGCSTS_TC_ENABLE define from this driver to the header.
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>
Introduce a helper function to handle the common code that writes the DMA
start address and number of acquisitions to the AMCC Add-on registers.
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>
This member of the private data is not really needed. The devpriv->ctrl
value can be checked to determine if the external trigger is enabled.
Remove the unnecessary member.
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>
This member of the private data is not really needed. The interrupt mode
can be determined by checking the devpriv->mode value to see if the
interrupt is enabled. Remove the unnecessary member.
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>
There is no reason for the separate updates of the mode register in this
function. Refactor the code so that the mode register is only updated at
the end of the function after all the necessary bits have been set.
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>
The 'SCAN_ENA' bit in the mode register needs to be set if the chanlist
has more than 1 channel. Set the bit in apci3120_set_chanlist() if needed.
The callers write the mode register after setting any additional bits,
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>
The APCI-3120 documentation says that the FIFO should be reset after the
chanlist sequence is programmed.
Reset the FIFO after programming the chanlist and remove the extra FIFO
resets in the driver.
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>
Tidy up the programming of timers 0 and 1 so that only one local variable is
required.
Also, remove the unnecessary clear of devpriv->timer_mode. This value will get
set correctly by each apci3120_timer_set_mode() call. It's not necessary to
clear it first.
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>
This functon is called by apci3120_ai_cmd() with one additional parameter,
'mode', The 'mode' is based on the cmd->scan_begin_src.
For aesthetics, absorb the function into apci3120_ai_cmd() and use the
cmd->scan_begin_src directly to determine the 'mode'.
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>
The n_chan check is not needed. This value will always be >= 1. Remove
the unnecessary check.
For aesthetics, rename the function and change it's return type to void.
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>
Move this function, and its helper function, from the included hwdrv_apci31210.c
source file to the main driver source file.
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>
Move this function, and its helper function, from the included hwdrv_apci31210.c
source file to the main driver source file.
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>
This member of the private data was used to determine if the interrupt
routine was handling data for the (*insn_read) or an async command. Now
that the (*insn_read) does not use interrupts this member is not needed.
Remove the member and refactor the code.
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>
Now that the scanning and interrupt support have been removed from this
function it can be refactored to work correctly.
The comedi core expects (*insn_read) functions to read insn->n values
from the hardware and return the number of samples read. This function
currently just reads one sample but it returns insn->n.
Fix this function to work like the core expects.
Use comedi_timeout() to prevent a possible deadlock in the loop that
waits for the end-of-conversion.
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>
This member of the private data was used to return analog input samples that
were acquired for the (*insn_read) using interrupts. The interrupt support
code for the (*insn_read) has been removed. Remove this unused member from
the private 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>
This function does not follow the comedi API for (*insn_config) functions.
It's also no long needed. Just remove it.
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>
(*insn_read) functions are supposed to do simple polled reads of a single
channel. This driver tries to be tricky and allow enabling interrupts in
the analog input (*insn_config) to allow the (*insn_read) to read samples
with the end-of-conversion interrupt.
The (*insn_config) doesn't follow the comedi API and this operation mode
is not part of the API.
Remove the interrupt support from the (*insn_read) as well as the support
code in the (*insn_config) and 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>
This driver tries to be tricky and allow passing an analog input conversion time
for the (*insn_read) in the (*insn_config). The (*insn_config) doesn't follow
the comedi API and this programmable conversion time is not part of the API for
(*insn_read) operations.
Remove the member from the private data and use a fixed 10us (10000ns) conversion
time in the (*insn_read).
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>
(*insn_read) functions are supposed to do simple polled reads of a single
channel. This driver tries to be tricky and allow passing a chanlist in
the analog input (*insn_config) to allow the (*insn_read) to do chanlist
scanning with or without interrupts.
The (*insn_config) doesn't follow the comedi API and this operation mode
is not part of the API.
Remove the scanning support from the (*insn_read) as well as the support
code in the (*insn_config) and 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>
