Home | History | Annotate | Line # | Download | only in ic
vgavar.h revision 1.3 
      1 /* $NetBSD: vgavar.h,v 1.3 1999/01/13 16:48:58 drochner Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 struct vga_handle {
     31 	struct pcdisplay_handle vh_ph;
     32 	bus_space_handle_t vh_ioh_vga, vh_allmemh;
     33 	int vh_mono;
     34 };
     35 #define vh_iot vh_ph.ph_iot
     36 #define vh_memt vh_ph.ph_memt
     37 #define vh_ioh_6845 vh_ph.ph_ioh_6845
     38 #define vh_memh vh_ph.ph_memh
     39 
     40 static inline u_int8_t _vga_attr_read __P((struct vga_handle *, int));
     41 static inline void _vga_attr_write __P((struct vga_handle *, int, u_int8_t));
     42 static inline u_int8_t _vga_ts_read __P((struct vga_handle *, int));
     43 static inline void _vga_ts_write __P((struct vga_handle *, int, u_int8_t));
     44 static inline u_int8_t _vga_gdc_read __P((struct vga_handle *, int));
     45 static inline void _vga_gdc_write __P((struct vga_handle *, int, u_int8_t));
     46 
     47 static inline u_int8_t _vga_attr_read(vh, reg)
     48 	struct vga_handle *vh;
     49 	int reg;
     50 {
     51 	u_int8_t res;
     52 
     53 	/* reset state */
     54 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
     55 
     56 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_INDEX, reg);
     57 	res = bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_DATAR);
     58 
     59 	/* reset state XXX unneeded? */
     60 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
     61 
     62 	/* enable */
     63 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, 0, 0x20);
     64 
     65 	return (res);
     66 }
     67 
     68 static inline void _vga_attr_write(vh, reg, val)
     69 	struct vga_handle *vh;
     70 	int reg;
     71 	u_int8_t val;
     72 {
     73 	/* reset state */
     74 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
     75 
     76 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_INDEX, reg);
     77 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_DATAW, val);
     78 
     79 	/* reset state XXX unneeded? */
     80 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
     81 
     82 	/* enable */
     83 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, 0, 0x20);
     84 }
     85 
     86 static inline u_int8_t _vga_ts_read(vh, reg)
     87 	struct vga_handle *vh;
     88 	int reg;
     89 {
     90 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_INDEX, reg);
     91 	return (bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_DATA));
     92 }
     93 
     94 static inline void _vga_ts_write(vh, reg, val)
     95 	struct vga_handle *vh;
     96 	int reg;
     97 	u_int8_t val;
     98 {
     99 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_INDEX, reg);
    100 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_DATA, val);
    101 }
    102 
    103 static inline u_int8_t _vga_gdc_read(vh, reg)
    104 	struct vga_handle *vh;
    105 	int reg;
    106 {
    107 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_INDEX, reg);
    108 	return (bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_DATA));
    109 }
    110 
    111 static inline void _vga_gdc_write(vh, reg, val)
    112 	struct vga_handle *vh;
    113 	int reg;
    114 	u_int8_t val;
    115 {
    116 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_INDEX, reg);
    117 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_DATA, val);
    118 }
    119 
    120 #define vga_attr_read(vh, reg) \
    121 	_vga_attr_read(vh, offsetof(struct reg_vgaattr, reg))
    122 #define vga_attr_write(vh, reg, val) \
    123 	_vga_attr_write(vh, offsetof(struct reg_vgaattr, reg), val)
    124 #define vga_ts_read(vh, reg) \
    125 	_vga_ts_read(vh, offsetof(struct reg_vgats, reg))
    126 #define vga_ts_write(vh, reg, val) \
    127 	_vga_ts_write(vh, offsetof(struct reg_vgats, reg), val)
    128 #define vga_gdc_read(vh, reg) \
    129 	_vga_gdc_read(vh, offsetof(struct reg_vgagdc, reg))
    130 #define vga_gdc_write(vh, reg, val) \
    131 	_vga_gdc_write(vh, offsetof(struct reg_vgagdc, reg), val)
    132 
    133 #define vga_6845_read(vh, reg) \
    134 	pcdisplay_6845_read(&(vh)->vh_ph, reg)
    135 #define vga_6845_write(vh, reg, val) \
    136 	pcdisplay_6845_write(&(vh)->vh_ph, reg, val)
    137 
    138 int	vga_common_probe __P((bus_space_tag_t, bus_space_tag_t));
    139 void	vga_common_attach __P((struct device *, bus_space_tag_t,
    140 			       bus_space_tag_t, int));
    141 int	vga_is_console __P((bus_space_tag_t, int));
    142 
    143 int	vga_cnattach __P((bus_space_tag_t, bus_space_tag_t, int, int));
    144 
    145 struct wsscreen_descr;
    146 void vga_loadchars __P((struct vga_handle *, int, int, int, int, char *));
    147 void vga_setfontset __P((struct vga_handle *, int, int));
    148 void vga_setscreentype __P((struct vga_handle *,
    149 			    const struct wsscreen_descr *));
    150