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fba4e898b9
According to an old GPL'ed driver at <ftp://ftp.mccdaq.com/downloads/iotech_software/DaqBoard_1000_2000_Series/Linux_driver_kernelv2.4.x/>, The CPLD status register can be checked to make sure that it is ready to accept the next 16-bit word of FPGA firmware data, but that doesn't work on older versions of the CPLD, where a simple delay should be used between successive writes. The current version of the Comedi driver just uses a delay between successive writes. Change it to check for the newer CPLD in the `daqboard2000_load_firmware()`, and change the firmware word writing function `daqboard2000_write_cpld()` to wait for the status bit (`DB2K_CPLD_STATUS_TXREADY`, previously called `DB2K_CPLD_TXDONE`) to be set for newer CPLD, or just delay for older CPLD. Return an error if it times out waiting for the status bit. The wait for the `DB2K_CPLD_STATUS_TXREADY` status bit to be set is performed by new function `daqboard2000_wait_cpld_txready()`, which returns 0 if the status bit is set within 100 microseconds, or `-ETIMEDOUT` if not. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| .. | ||
| drivers | ||
| kcomedilib | ||
| comedi_buf.c | ||
| comedi_compat32.c | ||
| comedi_compat32.h | ||
| comedi_fops.c | ||
| comedi_internal.h | ||
| comedi_pci.c | ||
| comedi_pci.h | ||
| comedi_pcmcia.c | ||
| comedi_pcmcia.h | ||
| comedi_usb.c | ||
| comedi_usb.h | ||
| comedi.h | ||
| comedidev.h | ||
| comedilib.h | ||
| drivers.c | ||
| Kconfig | ||
| Makefile | ||
| proc.c | ||
| range.c | ||
| TODO | ||