1 /* $OpenBSD: vgavar.h,v 1.13 2015/07/26 03:17:07 miod Exp $ */
2 /* $NetBSD: vgavar.h,v 1.4 2000/06/17 07:11:50 soda Exp $ */
3
4 /*
5 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
6 * All rights reserved.
7 *
8 * Author: Chris G. Demetriou
9 *
10 * Permission to use, copy, modify and distribute this software and
11 * its documentation is hereby granted, provided that both the copyright
12 * notice and this permission notice appear in all copies of the
13 * software, derivative works or modified versions, and any portions
14 * thereof, and that both notices appear in supporting documentation.
15 *
16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 *
20 * Carnegie Mellon requests users of this software to return to
21 *
22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
23 * School of Computer Science
24 * Carnegie Mellon University
25 * Pittsburgh PA 15213-3890
26 *
27 * any improvements or extensions that they make and grant Carnegie the
28 * rights to redistribute these changes.
29 */
30
31 #include <sys/timeout.h>
32
33 struct vga_handle {
34 struct pcdisplay_handle vh_ph;
35 bus_space_handle_t vh_ioh_vga, vh_allmemh;
36 int vh_mono;
37 };
38 #define vh_iot vh_ph.ph_iot
39 #define vh_memt vh_ph.ph_memt
40 #define vh_ioh_6845 vh_ph.ph_ioh_6845
41 #define vh_memh vh_ph.ph_memh
42
43 struct vgascreen {
44 struct pcdisplayscreen pcs;
45 LIST_ENTRY(vgascreen) next;
46
47 /* videostate */
48 struct vga_config *cfg;
49 /* font data */
50 struct vgafont *fontset1, *fontset2;
51
52 int mindispoffset, maxdispoffset;
53 int vga_rollover;
54 };
55
56 struct vga_config {
57 struct vga_handle hdl;
58
59 struct device *vc_softc;
60 int vc_type;
61 int nscreens;
62 LIST_HEAD(, vgascreen) screens;
63 struct vgascreen *active; /* current display */
64 const struct wsscreen_descr *currenttype;
65 int currentfontset1, currentfontset2;
66
67 #define VGA_MAXFONT 8
68 struct vgafont *vc_fonts[VGA_MAXFONT];
69 uint8_t vc_palette[256 * 3];
70
71 struct vgascreen *wantedscreen;
72 void (*switchcb)(void *, int, int);
73 void *switchcbarg;
74
75 paddr_t (*vc_mmap)(void *, off_t, int);
76
77 struct timeout vc_switch_timeout;
78
79 #ifdef __alpha__
80 /* placeholder for a custom wsscreen_descr for odd resolutions */
81 struct wsscreen_descr custom_scr;
82 struct wsscreen_descr *custom_scrlist[1];
83 struct wsscreen_list custom_list;
84 #endif
85 };
86
87 static inline u_int8_t _vga_attr_read(struct vga_handle *, int);
88 static inline void _vga_attr_write(struct vga_handle *, int, u_int8_t);
89 static inline u_int8_t _vga_ts_read(struct vga_handle *, int);
90 static inline void _vga_ts_write(struct vga_handle *, int, u_int8_t);
91 static inline u_int8_t _vga_gdc_read(struct vga_handle *, int);
92 static inline void _vga_gdc_write(struct vga_handle *, int, u_int8_t);
93
94 #define vga_raw_read(vh, reg) \
95 bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, reg)
96 #define vga_raw_write(vh, reg, value) \
97 bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, reg, value)
98
99 #define vga_enable(vh) \
100 vga_raw_write(vh, 0, 0x20);
101
102 static inline u_int8_t
_vga_attr_read(struct vga_handle * vh,int reg)103 _vga_attr_read(struct vga_handle *vh, int reg)
104 {
105 u_int8_t res;
106
107 /* reset state */
108 (void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
109
110 vga_raw_write(vh, VGA_ATC_INDEX, reg);
111 res = vga_raw_read(vh, VGA_ATC_DATAR);
112
113 /* reset state XXX unneeded? */
114 (void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
115
116 vga_enable(vh);
117
118 return (res);
119 }
120
121 static inline void
_vga_attr_write(struct vga_handle * vh,int reg,u_int8_t val)122 _vga_attr_write(struct vga_handle *vh, int reg, u_int8_t val)
123 {
124 /* reset state */
125 (void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
126
127 vga_raw_write(vh, VGA_ATC_INDEX, reg);
128 vga_raw_write(vh, VGA_ATC_DATAW, val);
129
130 /* reset state XXX unneeded? */
131 (void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
132
133 vga_enable(vh);
134 }
135
136 static inline u_int8_t
_vga_ts_read(struct vga_handle * vh,int reg)137 _vga_ts_read(struct vga_handle *vh, int reg)
138 {
139 vga_raw_write(vh, VGA_TS_INDEX, reg);
140 return (vga_raw_read(vh, VGA_TS_DATA));
141 }
142
143 static inline void
_vga_ts_write(struct vga_handle * vh,int reg,u_int8_t val)144 _vga_ts_write(struct vga_handle *vh, int reg, u_int8_t val)
145 {
146 vga_raw_write(vh, VGA_TS_INDEX, reg);
147 vga_raw_write(vh, VGA_TS_DATA, val);
148 }
149
150 static inline u_int8_t
_vga_gdc_read(struct vga_handle * vh,int reg)151 _vga_gdc_read(struct vga_handle *vh, int reg)
152 {
153 vga_raw_write(vh, VGA_GDC_INDEX, reg);
154 return (vga_raw_read(vh, VGA_GDC_DATA));
155 }
156
157 static inline void
_vga_gdc_write(struct vga_handle * vh,int reg,u_int8_t val)158 _vga_gdc_write(struct vga_handle *vh, int reg, u_int8_t val)
159 {
160 vga_raw_write(vh, VGA_GDC_INDEX, reg);
161 vga_raw_write(vh, VGA_GDC_DATA, val);
162 }
163
164 #define vga_attr_read(vh, reg) \
165 _vga_attr_read(vh, offsetof(struct reg_vgaattr, reg))
166 #define vga_attr_write(vh, reg, val) \
167 _vga_attr_write(vh, offsetof(struct reg_vgaattr, reg), val)
168 #define vga_ts_read(vh, reg) \
169 _vga_ts_read(vh, offsetof(struct reg_vgats, reg))
170 #define vga_ts_write(vh, reg, val) \
171 _vga_ts_write(vh, offsetof(struct reg_vgats, reg), val)
172 #define vga_gdc_read(vh, reg) \
173 _vga_gdc_read(vh, offsetof(struct reg_vgagdc, reg))
174 #define vga_gdc_write(vh, reg, val) \
175 _vga_gdc_write(vh, offsetof(struct reg_vgagdc, reg), val)
176
177 #define vga_6845_read(vh, reg) \
178 pcdisplay_6845_read(&(vh)->vh_ph, reg)
179 #define vga_6845_write(vh, reg, val) \
180 pcdisplay_6845_write(&(vh)->vh_ph, reg, val)
181
182 int vga_common_probe(bus_space_tag_t, bus_space_tag_t);
183 struct vga_config *
184 vga_common_attach(struct device *, bus_space_tag_t, bus_space_tag_t,
185 int);
186 struct vga_config *
187 vga_extended_attach(struct device *, bus_space_tag_t, bus_space_tag_t,
188 int, paddr_t (*)(void *, off_t, int));
189 int vga_is_console(bus_space_tag_t, int);
190 int vga_cnattach(bus_space_tag_t, bus_space_tag_t, int, int);
191
192 struct wsscreen_descr;
193 void vga_loadchars(struct vga_handle *, int, int, int, int, char *);
194 void vga_restore_fonts(struct vga_config *);
195 void vga_restore_palette(struct vga_config *);
196 void vga_save_palette(struct vga_config *);
197 void vga_setfontset(struct vga_handle *, int, int);
198 void vga_setscreentype(struct vga_handle *, const struct wsscreen_descr *);
199 #if NVGA_PCI > 0
200 int vga_pci_ioctl(void *, u_long, caddr_t, int, struct proc *);
201 #endif
202