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