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 struct device_driver driver; 98 }; 99 #define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver) 100 101 /* Ongoing supported API functions */ 102 extern struct mca_device *mca_find_device_by_slot(int slot); 103 extern int mca_system_init(void); 104 extern struct mca_bus *mca_attach_bus(int); 105 106 extern unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev, 107 int reg); 108 extern unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg); 109 extern void mca_device_write_pos(struct mca_device *mca_dev, int reg, 110 unsigned char byte); 111 extern int mca_device_transform_irq(struct mca_device *mca_dev, int irq); 112 extern int mca_device_transform_ioport(struct mca_device *mca_dev, int port); 113 extern void *mca_device_transform_memory(struct mca_device *mca_dev, 114 void *mem); 115 extern int mca_device_claimed(struct mca_device *mca_dev); 116 extern void mca_device_set_claim(struct mca_device *mca_dev, int val); 117 extern void mca_device_set_name(struct mca_device *mca_dev, const char *name); 118 static inline char *mca_device_get_name(struct mca_device *mca_dev) 119 { 120 return mca_dev ? mca_dev->name : NULL; 121 } 122 123 extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev); 124 125 extern struct bus_type mca_bus_type; 126 127 extern int mca_register_driver(struct mca_driver *drv); 128 extern void mca_unregister_driver(struct mca_driver *drv); 129 130 /* WARNING: only called by the boot time device setup */ 131 extern int mca_register_device(int bus, struct mca_device *mca_dev); 132 133 #ifdef CONFIG_MCA_PROC_FS 134 extern void mca_do_proc_init(void); 135 extern void mca_set_adapter_procfn(int slot, MCA_ProcFn, void* dev); 136 #else 137 static inline void mca_do_proc_init(void) 138 { 139 } 140 141 static inline void mca_set_adapter_procfn(int slot, MCA_ProcFn fn, void* dev) 142 { 143 } 144 #endif 145 146 #endif /* _LINUX_MCA_H */ 147
