| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8 -*- */ |
| 2 | |
| 3 | /* This is the function prototypes for the old legacy MCA interface |
| 4 | * |
| 5 | * Please move your driver to the new sysfs based one instead */ |
| 6 | |
| 7 | #ifndef _LINUX_MCA_LEGACY_H |
| 8 | #define _LINUX_MCA_LEGACY_H |
| 9 | |
| 10 | #include <linux/mca.h> |
| 11 | |
| 12 | #warning "MCA legacy - please move your driver to the new sysfs api" |
| 13 | |
| 14 | /* MCA_NOTFOUND is an error condition. The other two indicate |
| 15 | * motherboard POS registers contain the adapter. They might be |
| 16 | * returned by the mca_find_adapter() function, and can be used as |
| 17 | * arguments to mca_read_stored_pos(). I'm not going to allow direct |
| 18 | * access to the motherboard registers until we run across an adapter |
| 19 | * that requires it. We don't know enough about them to know if it's |
| 20 | * safe. |
| 21 | * |
| 22 | * See Documentation/mca.txt or one of the existing drivers for |
| 23 | * more information. |
| 24 | */ |
| 25 | #define MCA_NOTFOUND (-1) |
| 26 | |
| 27 | |
| 28 | |
| 29 | /* Returns the slot of the first enabled adapter matching id. User can |
| 30 | * specify a starting slot beyond zero, to deal with detecting multiple |
| 31 | * devices. Returns MCA_NOTFOUND if id not found. Also checks the |
| 32 | * integrated adapters. |
| 33 | */ |
| 34 | extern int mca_find_adapter(int id, int start); |
| 35 | extern int mca_find_unused_adapter(int id, int start); |
| 36 | |
| 37 | extern int mca_is_adapter_used(int slot); |
| 38 | extern int mca_mark_as_used(int slot); |
| 39 | extern void mca_mark_as_unused(int slot); |
| 40 | |
| 41 | /* gets a byte out of POS register (stored in memory) */ |
| 42 | extern unsigned char mca_read_stored_pos(int slot, int reg); |
| 43 | |
| 44 | /* This can be expanded later. Right now, it gives us a way of |
| 45 | * getting meaningful information into the MCA_info structure, |
| 46 | * so we can have a more interesting /proc/mca. |
| 47 | */ |
| 48 | extern void mca_set_adapter_name(int slot, char* name); |
| 49 | |
| 50 | /* These routines actually mess with the hardware POS registers. They |
| 51 | * temporarily disable the device (and interrupts), so make sure you know |
| 52 | * what you're doing if you use them. Furthermore, writing to a POS may |
| 53 | * result in two devices trying to share a resource, which in turn can |
| 54 | * result in multiple devices sharing memory spaces, IRQs, or even trashing |
| 55 | * hardware. YOU HAVE BEEN WARNED. |
| 56 | * |
| 57 | * You can only access slots with this. Motherboard registers are off |
| 58 | * limits. |
| 59 | */ |
| 60 | |
| 61 | /* read a byte from the specified POS register. */ |
| 62 | extern unsigned char mca_read_pos(int slot, int reg); |
| 63 | |
| 64 | /* write a byte to the specified POS register. */ |
| 65 | extern void mca_write_pos(int slot, int reg, unsigned char byte); |
| 66 | |
| 67 | #endif |