Messages in this thread | | | Date | Fri, 02 Mar 2001 19:33:43 -0500 | From | Thomas Hood <> | Subject | Re: Should isa-pnp utilize the PnP BIOS? |
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Okay, a couple of people have responded positively to this suggestion. The next question is, how should it be implemented?
How 'bout:
$ cd pcmcia-cs/modules $ cp pnp_bios.c pnp_proc.c pnp_rsrc.c /usr/src/linux/2.4.2a/drivers/pnp $ cd ../include/linux $ cp pnp_bios.h pnp_resource.h /usr/src/linux/2.4.2a/include/linux Edit makefiles Edit isapnp.c to include new global flag "isapnp_usepnpbios", a MODULE_PARM, which each isapnp function checks at entry. If the flag is set then: in the case of "low-level" functions, return immediately; in the case of "high-level" functions, call appropriate pnp_bios functions to perform the task; in the case of isapnp_init(), just check isapnp_disabled and exit. isapnp's /proc interface would not be supported. Presumably inter_module_get_request() would be used to call the isapnp-bios routines.
Comments? (Go easy on me; I'm a newbie at kernel hacking.)
Thomas
> Hello, l-k. > > On my ThinkPad 600, The ThinkPad PnP BIOS configures > all PnP devices at boot time. > > If I load the isa-pnp.o driver it never detects any ISA PnP > devices: it says "isapnp: No Plug & Play device found". This > is unfortunate, because it means that device drivers can't > find out from isa-pnp where the devices are. > > David Hinds's pcmcia-cs package contains driver code that > interfaces with the PnP BIOS. With it, one can list the resource > usage of ISA PnP devices (serial and parallel ports, sound chip, > etc.) and set them, using the "lspnp" and "setpnp" commands. > > Would it not be useful if the isa-pnp driver would fall back > to utilizing the PnP BIOS (if possible) in order to read and > change ISA PnP device configurations when it can't do this > itself? If so, could this perhaps be done by bringing the Hinds > PnP BIOS driver into the kernel and interfacing isa-pnp to it? > > Thomas Hood > jdthood_AT_yahoo.co.uk <- Change '_AT_' to '@' - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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