include/asm-parisc/gsc.h

   1 #ifndef ASM_PARISC_GSC_H
   2 #define ASM_PARISC_GSC_H
   3 #ifdef __KERNEL__
   4
   5 #include <linux/types.h>
   6 #include <asm/hardware.h>       /* for struct hp_device */
   7
   8 /*
   9  * The convention used for inb/outb etc. is that names starting with
  10  * two underscores are the inline versions, names starting with a
  11  * single underscore are proper functions, and names starting with a
  12  * letter are macros that map in some way to inline or proper function
  13  * versions.  Not all that pretty, but before you change it, be sure
  14  * to convince yourself that it won't break anything (in particular
  15  * module support).
  16  */
  17 extern   u8 _gsc_readb(void *);
  18 extern  u16 _gsc_readw(void *);
  19 extern  u32 _gsc_readl(void *);
  20 extern  u64 _gsc_readq(void *);
  21 extern void _gsc_writeb(u8, void *);
  22 extern void _gsc_writew(u16,void *);
  23 extern void _gsc_writel(u32,void *);
  24 extern void _gsc_writeq(u64,void *);
  25
  26 #define gsc_readb(a)    _gsc_readb((void *)(a))
  27 #define gsc_readw(a)    _gsc_readw((void *)(a))
  28 #define gsc_readl(a)    _gsc_readl((void *)(a))
  29 #define gsc_readq(a)    _gsc_readq((void *)(a))
  30 #define gsc_writeb(v,a) _gsc_writeb((v),(void *)(a))
  31 #define gsc_writew(v,a) _gsc_writew((v),(void *)(a))
  32 #define gsc_writel(v,a) _gsc_writel((v),(void *)(a))
  33 #define gsc_writeq(v,a) _gsc_writeq((v),(void *)(a))
  34
  35 struct gsc_dev {
  36         struct gsc_bus  *bus;           /* bus this device is on */
  37         struct gsc_dev  *next;          /* chain of all devices */
  38         struct gsc_dev  *next_bus;      /* chain of all devices on a bus */
  39         struct gsc_dev  *next_submod;   /* chain of all devices on a module */
  40
  41         unsigned        irq;            /* irq generated by this device */
  42         void            *hpa;           /* hard physical address */
  43
  44         u16             hversion;
  45         u8              spa;            /* SPA requirements */
  46         u8              type;
  47         u32             sversion;
  48 };
  49
  50 struct gsc_irq {
  51         unsigned long txn_addr; /* IRQ "target" */
  52         int txn_data;           /* HW "IRQ" */
  53         int irq;                /* virtual IRQ */
  54 };
  55
  56 /* PA I/O Architected devices support at least 5 bits in the EIM register. */
  57 #define GSC_EIM_WIDTH 5
  58
  59 extern int gsc_alloc_irq(struct gsc_irq *dev);  /* dev needs an irq */
  60 extern int gsc_claim_irq(struct gsc_irq *dev, int irq); /* dev needs this irq */
  61
  62 struct gsc_bus {
  63         void            *hpa;           /* HPA of device 0, function 0 of this bus */
  64 };
  65
  66 /*
  67  * There is one gsc_dev structure for each slot-number/function-number
  68  * combination:
  69  */
  70
  71 struct gsc_dev *gsc_find_device(u16 hversion, struct gsc_dev *from);
  72
  73 extern void probe_serial_gsc(void);
  74
  75 /* returns a virtual irq for device at dev->hpa (works for all LASI/ASP/WAX) */
  76 extern int busdevice_alloc_irq( struct hp_device *dev );
  77
  78 #endif /* __KERNEL__ */
  79 #endif /* LINUX_GSC_H */