/* -*- mode: c; c-basic-offset: 8 -*- */ /* This is the function prototypes for the old legacy MCA interface * * Please move your driver to the new sysfs based one instead */ #ifndef _LINUX_MCA_LEGACY_H #define _LINUX_MCA_LEGACY_H #include #warning "MCA legacy - please move your driver to the new sysfs api" /* MCA_NOTFOUND is an error condition. The other two indicate * motherboard POS registers contain the adapter. They might be * returned by the mca_find_adapter() function, and can be used as * arguments to mca_read_stored_pos(). I'm not going to allow direct * access to the motherboard registers until we run across an adapter * that requires it. We don't know enough about them to know if it's * safe. * * See Documentation/mca.txt or one of the existing drivers for * more information. */ #define MCA_NOTFOUND (-1) /* Returns the slot of the first enabled adapter matching id. User can * specify a starting slot beyond zero, to deal with detecting multiple * devices. Returns MCA_NOTFOUND if id not found. Also checks the * integrated adapters. */ extern int mca_find_adapter(int id, int start); extern int mca_find_unused_adapter(int id, int start); extern int mca_mark_as_used(int slot); extern void mca_mark_as_unused(int slot); /* gets a byte out of POS register (stored in memory) */ extern unsigned char mca_read_stored_pos(int slot, int reg); /* This can be expanded later. Right now, it gives us a way of * getting meaningful information into the MCA_info structure, * so we can have a more interesting /proc/mca. */ extern void mca_set_adapter_name(int slot, char* name); /* These routines actually mess with the hardware POS registers. They * temporarily disable the device (and interrupts), so make sure you know * what you're doing if you use them. Furthermore, writing to a POS may * result in two devices trying to share a resource, which in turn can * result in multiple devices sharing memory spaces, IRQs, or even trashing * hardware. YOU HAVE BEEN WARNED. * * You can only access slots with this. Motherboard registers are off * limits. */ /* read a byte from the specified POS register. */ extern unsigned char mca_read_pos(int slot, int reg); /* write a byte to the specified POS register. */ extern void mca_write_pos(int slot, int reg, unsigned char byte); #endif