Uniden Data 2000 Wireless CDPD PC Card Guía de usuario descargar pdf (Pagina 54)

/proc/bus/pccard/*/info

For each socket, describes that socket's host controller and its capabilities.

/proc/bus/pccard/*/exca

This contains a dump of a controller's ``ExCA'' Intel i82365sl−compatible register set.

/proc/bus/pccard/*/{pci,cardbus}

For CardBus bridges, a dump of the bridge's PCI configuration space, and a dump of the

bridge's CardBus configuration registers.

7.5 Writing Card Services drivers for new cards

The Linux PCMCIA Programmer's Guide is the best documentation for the client driver interface. The latest

version is always available from sourceforge.org in /pcmcia/doc, or on the web at

http://pcmcia.sourceforge.org.

For devices that are close relatives of normal ISA devices, you will probably be able to use parts of existing

Linux drivers. In some cases, the biggest stumbling block will be modifying an existing driver so that it can

handle adding and removing devices after boot time. Of the current drivers, the memory card driver is the

only ``self−contained'' driver that does not depend on other parts of the Linux kernel to do most of the dirty

work.

In many cases, the largest barrier to supporting a new card type is obtaining technical information from the

manufacturer. It may be difficult to figure out who to ask, or to explain exactly what information is needed.

However, with a few exceptions, it is very difficult if not impossible to implement a driver for a card without

technical information from the manufacturer.

I have written a dummy driver with lots of comments that explains a lot of how a driver communicates with

Card Services; you will find this in the PCMCIA source distribution in clients/dummy_cs.c.

7.6 Guidelines for PCMCIA client driver authors

I have decided that it is not really feasible for me to distribute all PCMCIA client drivers as part of the

PCMCIA package. Each new driver makes the main package incrementally harder to maintain, and including

a driver inevitably transfers some of the maintenance work from the driver author to me. Instead, I will

decide on a case by case basis whether or not to include contributed drivers, based on user demand as well as

maintainability. For drivers not included in the core package, I suggest that driver authors adopt the following

scheme for packaging their drivers for distribution.

Driver files should be arranged in the same directory scheme used in the PCMCIA source distribution, so that

the driver can be unpacked on top of a complete PCMCIA source tree. A driver should include source files

(in ./modules/), a man page (in ./man/), and configuration files (in ./etc/). The top level directory

should also include a README file.

Linux PCMCIA HOWTO

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Uniden Data 2000 Wireless CDPD PC Card Guía de usuario Pagina 54