linux-dev/drivers/staging/comedi/internal.h, branch master

staging: comedi: rename internal.h to comedi_internal.h

2012-06-20T19:56:54Z

Use a less generic name for this internal header file included by various parts of the comedi core. Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman

staging: comedi: Add module parameters for default buffer size

2012-04-13T18:18:23Z

For comedi subdevices that support asynchronous transfer commands, the initial buffer size and maximum buffer size for the transfer are both set to 64 KiB when the comedi device is "attached" to the hardware device. For many applications with reasonable fast sample rates and slow user-space (e.g. Python) these sizes are a bit too small. A task with CAP_SYS_ADMIN privileges can change the maximum buffer size for a comedi subdevice with an ioctl call or by writing to a device attribute file in sysfs, but that's not very convenient. For comedi devices attached during system startup, this could be done by a start-up script, but for hot-plugged devices it would require scripts run by udev rules, etc. Rather than use hardwired values, this patch introduces a couple of module parameters to set the defaults for the initial buffer size (comedi_default_buf_size_kb) and maximum buffer size (comedi_default_buf_maxsize_kb). These values are applied in place of the previous hard-wired values when the comedi device is "attached". The module parameter values are in units of KiB for consistency with the existing device attribute files. Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman

staging: comedi: don't hijack hardware device private data

2012-04-10T18:21:10Z

comedi_auto_config() associates a Comedi minor device number with an auto-configured hardware device and comedi_auto_unconfig() disassociates it. Currently, these use the hardware device's private data pointer to point to some allocated storage holding the minor device number. This is a bit of a waste of the hardware device's private data pointer, preventing it from being used for something more useful by the low-level comedi device drivers. For example, it would make more sense if comedi_usb_auto_config() was passed a pointer to the struct usb_interface instead of the struct usb_device, but this cannot be done currently because the low-level comedi drivers already use the private data pointer in the struct usb_interface for something more useful. This patch stops the comedi core hijacking the hardware device's private data pointer. Instead, comedi_auto_config() stores a pointer to the hardware device's struct device in the struct comedi_device_file_info associated with the minor device number, and comedi_auto_unconfig() calls new function comedi_find_board_minor() to recover the minor device number associated with the hardware device. Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman

Staging: comedi: drivers.c sparse cleanup

2010-05-11T18:36:03Z

Fix up some sparse issues in drivers.c Cc: Ian Abbott Cc: Frank Mori Hess Signed-off-by: Greg Kroah-Hartman

Staging: comedi: range.c: properly mark up __user pointers

2010-05-11T18:36:03Z

This is the start of cleaning up the user pointer markings in the comedi core. Cc: Ian Abbott Cc: Frank Mori Hess Signed-off-by: Greg Kroah-Hartman

Staging: comedi: move some more functions to internal.h

2010-05-11T18:36:03Z

Only the internal comedi core calls these, so put them here. Cc: Ian Abbott Cc: Frank Mori Hess Signed-off-by: Greg Kroah-Hartman

Staging: comedi: make comedi_reset_async_buf local to comedi core

2010-05-11T18:36:03Z

No one outside of the comedi core calls this function, so don't export it to the world. Cc: Ian Abbott Cc: Frank Mori Hess Signed-off-by: Greg Kroah-Hartman

Staging: comedi: make comedi_free_board_minor local to comedi core

2010-05-11T18:36:03Z

No one outside of the comedi core calls this function, so don't export it to the world. Cc: Ian Abbott Cc: Frank Mori Hess Signed-off-by: Greg Kroah-Hartman

Staging: comedi: make comedi_alloc_board_minor local to comedi core

2010-05-11T18:36:03Z

No one outside of the comedi core calls this function, so create an internal.h file to put the prototype in, and don't export it to the world. Cc: Ian Abbott Cc: Frank Mori Hess Signed-off-by: Greg Kroah-Hartman