haiku/headers/private/graphics/AGP.h

109 lines
3.4 KiB
C
Raw Normal View History

/*******************************************************************************
/
/ File: AGP.h
/
/ Description: Interface to the AGP bus and driver.
/ For more information, see "AGP interface specification", Revision 2.0 and 3.0,
/ Intel Corporation, 1998-2002.
/
/ Rudolf Cornelissen 6/2004-7/2004.
/
*******************************************************************************/
#if !defined(_AGP_H_)
#define _AGP_H_
#include <bus_manager.h>
#ifdef __cplusplus
extern "C" {
#endif
/* -----
agp device info
----- */
typedef struct agp_info {
ushort vendor_id; /* vendor id */
ushort device_id; /* device id */
uchar bus; /* bus number */
uchar device; /* device number on bus */
uchar function; /* function number in device */
uchar class_sub; /* specific device function */
uchar class_base; /* device type (display vs host bridge) */
struct
{
uint32 agp_cap_id; /* AGP capability register as defined in the AGP standard */
uint32 agp_stat; /* AGP STATUS register as defined in the AGP standard */
uint32 agp_cmd; /* AGP COMMAND register as defined in the AGP standard */
} interface;
status_t status; /* B_OK if usable, B_ERROR if device did not respond
* according to the AGP standard */
} agp_info;
typedef struct agp_module_info agp_module_info;
struct agp_module_info {
bus_manager_info binfo;
long (*get_nth_agp_info) (
long index, /* index into agp device table */
agp_info *info /* caller-supplied buffer for info */
);
void (*enable_agp) (
uint32 *command /* max. mode to set */
);
//fixme: GART and APERTURE stuff is lacking for now, add here...
};
#define B_AGP_MODULE_NAME "bus_managers/agp/v0"
/* ---
value for the AGP_id field in the agp_cap_id register
--- */
#define AGP_id 0x02 /* AGP device identification */
/* ---
masks for capability ID register bits
--- */
#define AGP_id_mask 0x000000ff /* AGP capability identification, contains value 0x02 for AGP device */
#define AGP_next_ptr 0x0000ff00 /* pointer to next item in PCI capabilities list, contains 0x00 if this is last item */
#define AGP_next_ptr_shift 8
#define AGP_rev_minor 0x000f0000 /* AGP Revision minor number reported */
#define AGP_rev_minor_shift 16
#define AGP_rev_major 0x00f00000 /* AGP Revision major number reported */
#define AGP_rev_major_shift 20
/* ---
masks for status and command register bits
--- */
#define AGP_2_1x 0x00000001 /* AGP Revision 2.0 1x speed transfer mode */
#define AGP_2_2x 0x00000002 /* AGP Revision 2.0 2x speed transfer mode */
#define AGP_2_4x 0x00000004 /* AGP Revision 2.0 4x speed transfer mode */
#define AGP_3_4x 0x00000001 /* AGP Revision 3.0 4x speed transfer mode */
#define AGP_3_8x 0x00000002 /* AGP Revision 3.0 8x speed transfer mode */
#define AGP_rates 0x00000007 /* mask for supported rates info */
#define AGP_rate_rev 0x00000008 /* 0 if AGP Revision 2.0 or earlier rate scheme, 1 if AGP Revision 3.0 rate scheme */
#define AGP_FW 0x00000010 /* 1 if fastwrite transfers supported */
#define AGP_4G 0x00000020 /* 1 if adresses above 4G bytes supported */
#define AGP_SBA 0x00000200 /* 1 if sideband adressing supported */
#define AGP_RQ 0xff000000 /* max. number of enqueued AGP command requests supported, minus one */
#define AGP_RQ_shift 24
/* ---
masks for command register bits
--- */
#define AGP_enable 0x00000100 /* set to 1 if AGP should be enabled */
#ifdef __cplusplus
}
#endif
#endif