| 1 | /* |
| 2 | * Header for Microchannel Architecture Bus |
| 3 | * Written by Martin Kolinek, February 1996 |
| 4 | */ |
| 5 | |
| 6 | #ifndef _LINUX_MCA_H |
| 7 | #define _LINUX_MCA_H |
| 8 | |
| 9 | #include <linux/device.h> |
| 10 | |
| 11 | #ifdef CONFIG_MCA |
| 12 | #include <asm/mca.h> |
| 13 | |
| 14 | extern int MCA_bus; |
| 15 | #else |
| 16 | #define MCA_bus 0 |
| 17 | #endif |
| 18 | |
| 19 | /* This sets up an information callback for /proc/mca/slot?. The |
| 20 | * function is called with the buffer, slot, and device pointer (or |
| 21 | * some equally informative context information, or nothing, if you |
| 22 | * prefer), and is expected to put useful information into the |
| 23 | * buffer. The adapter name, id, and POS registers get printed |
| 24 | * before this is called though, so don't do it again. |
| 25 | * |
| 26 | * This should be called with a NULL procfn when a module |
| 27 | * unregisters, thus preventing kernel crashes and other such |
| 28 | * nastiness. |
| 29 | */ |
| 30 | typedef int (*MCA_ProcFn)(char* buf, int slot, void* dev); |
| 31 | |
| 32 | /* Should only be called by the NMI interrupt handler, this will do some |
| 33 | * fancy stuff to figure out what might have generated a NMI. |
| 34 | */ |
| 35 | extern void mca_handle_nmi(void); |
| 36 | |
| 37 | enum MCA_AdapterStatus { |
| 38 | MCA_ADAPTER_NORMAL = 0, |
| 39 | MCA_ADAPTER_NONE = 1, |
| 40 | MCA_ADAPTER_DISABLED = 2, |
| 41 | MCA_ADAPTER_ERROR = 3 |
| 42 | }; |
| 43 | |
| 44 | struct mca_device { |
| 45 | u64 dma_mask; |
| 46 | int pos_id; |
| 47 | int slot; |
| 48 | |
| 49 | /* index into id_table, set by the bus match routine */ |
| 50 | int index; |
| 51 | |
| 52 | /* is there a driver installed? 0 - No, 1 - Yes */ |
| 53 | int driver_loaded; |
| 54 | /* POS registers */ |
| 55 | unsigned char pos[8]; |
| 56 | /* if a pseudo adapter of the motherboard, this is the motherboard |
| 57 | * register value to use for setup cycles */ |
| 58 | short pos_register; |
| 59 | |
| 60 | enum MCA_AdapterStatus status; |
| 61 | #ifdef CONFIG_MCA_PROC_FS |
| 62 | /* name of the proc/mca file */ |
| 63 | char procname[8]; |
| 64 | /* /proc info callback */ |
| 65 | MCA_ProcFn procfn; |
| 66 | /* device/context info for proc callback */ |
| 67 | void *proc_dev; |
| 68 | #endif |
| 69 | struct device dev; |
| 70 | char name[32]; |
| 71 | }; |
| 72 | #define to_mca_device(mdev) container_of(mdev, struct mca_device, dev) |
| 73 | |
| 74 | struct mca_bus_accessor_functions { |
| 75 | unsigned char (*mca_read_pos)(struct mca_device *, int reg); |
| 76 | void (*mca_write_pos)(struct mca_device *, int reg, |
| 77 | unsigned char byte); |
| 78 | int (*mca_transform_irq)(struct mca_device *, int irq); |
| 79 | int (*mca_transform_ioport)(struct mca_device *, |
| 80 | int region); |
| 81 | void * (*mca_transform_memory)(struct mca_device *, |
| 82 | void *memory); |
| 83 | }; |
| 84 | |
| 85 | struct mca_bus { |
| 86 | u64 default_dma_mask; |
| 87 | int number; |
| 88 | struct mca_bus_accessor_functions f; |
| 89 | struct device dev; |
| 90 | char name[32]; |
| 91 | }; |
| 92 | #define to_mca_bus(mdev) container_of(mdev, struct mca_bus, dev) |
| 93 | |
| 94 | struct mca_driver { |
| 95 | const short *id_table; |
| 96 | void *driver_data; |
| 97 | int integrated_id; |
| 98 | struct device_driver driver; |
| 99 | }; |
| 100 | #define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver) |
| 101 | |
| 102 | /* Ongoing supported API functions */ |
| 103 | extern struct mca_device *mca_find_device_by_slot(int slot); |
| 104 | extern int mca_system_init(void); |
| 105 | extern struct mca_bus *mca_attach_bus(int); |
| 106 | |
| 107 | extern unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev, |
| 108 | int reg); |
| 109 | extern unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg); |
| 110 | extern void mca_device_write_pos(struct mca_device *mca_dev, int reg, |
| 111 | unsigned char byte); |
| 112 | extern int mca_device_transform_irq(struct mca_device *mca_dev, int irq); |
| 113 | extern int mca_device_transform_ioport(struct mca_device *mca_dev, int port); |
| 114 | extern void *mca_device_transform_memory(struct mca_device *mca_dev, |
| 115 | void *mem); |
| 116 | extern int mca_device_claimed(struct mca_device *mca_dev); |
| 117 | extern void mca_device_set_claim(struct mca_device *mca_dev, int val); |
| 118 | extern void mca_device_set_name(struct mca_device *mca_dev, const char *name); |
| 119 | static inline char *mca_device_get_name(struct mca_device *mca_dev) |
| 120 | { |
| 121 | return mca_dev ? mca_dev->name : NULL; |
| 122 | } |
| 123 | |
| 124 | extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev); |
| 125 | |
| 126 | extern struct bus_type mca_bus_type; |
| 127 | |
| 128 | extern int mca_register_driver(struct mca_driver *drv); |
| 129 | extern int mca_register_driver_integrated(struct mca_driver *, int); |
| 130 | extern void mca_unregister_driver(struct mca_driver *drv); |
| 131 | |
| 132 | /* WARNING: only called by the boot time device setup */ |
| 133 | extern int mca_register_device(int bus, struct mca_device *mca_dev); |
| 134 | |
| 135 | #ifdef CONFIG_MCA_PROC_FS |
| 136 | extern void mca_do_proc_init(void); |
| 137 | extern void mca_set_adapter_procfn(int slot, MCA_ProcFn, void* dev); |
| 138 | #else |
| 139 | static inline void mca_do_proc_init(void) |
| 140 | { |
| 141 | } |
| 142 | |
| 143 | static inline void mca_set_adapter_procfn(int slot, MCA_ProcFn fn, void* dev) |
| 144 | { |
| 145 | } |
| 146 | #endif |
| 147 | |
| 148 | #endif /* _LINUX_MCA_H */ |