include/linux/mca.h

   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 */