1/* $NetBSD: vgavar.h,v 1.33 2015/01/14 17:45:27 chs 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@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#include <sys/callout.h>
31
32#ifdef _KERNEL_OPT
33#include "opt_vga.h"
34#endif
35
36struct vga_handle {
37 struct pcdisplay_handle vh_ph;
38 bus_space_handle_t vh_ioh_vga, vh_allmemh;
39 int vh_mono;
40};
41#define vh_iot vh_ph.ph_iot
42#define vh_memt vh_ph.ph_memt
43#define vh_ioh_6845 vh_ph.ph_ioh_6845
44#define vh_memh vh_ph.ph_memh
45
46struct vga_funcs {
47 int (*vf_ioctl)(void *, u_long, void *, int, struct lwp *);
48 paddr_t (*vf_mmap)(void *, off_t, int);
49};
50
51struct vga_config {
52 struct vga_handle hdl;
53 struct vga_softc *softc;
54
55 int nscreens;
56 LIST_HEAD(, vgascreen) screens;
57 struct vgascreen *active; /* current display */
58 const struct wsscreen_descr *currenttype;
59
60 struct vgascreen *wantedscreen;
61 void (*switchcb)(void *, int, int);
62 void *switchcbarg;
63
64 struct callout vc_switch_callout;
65 int vc_quirks;
66 int vc_type;
67 const struct vga_funcs *vc_funcs;
68
69 u_int8_t palette[256 * 3];
70#ifndef VGA_RASTERCONSOLE
71 int currentfontset1, currentfontset2;
72 int vc_nfontslots;
73 struct egavga_font *vc_fonts[8]; /* currently loaded */
74 TAILQ_HEAD(, egavga_font) vc_fontlist; /* LRU queue */
75#else
76 int nfonts;
77 LIST_HEAD(, vga_raster_font) vc_fontlist;
78#endif /* !VGA_RASTERCONSOLE */
79};
80
81struct vga_softc {
82 device_t sc_dev;
83 struct vga_config *sc_vc;
84};
85
86static __inline u_int8_t _vga_attr_read(struct vga_handle *, int);
87static __inline void _vga_attr_write(struct vga_handle *, int, u_int8_t);
88static __inline u_int8_t _vga_ts_read(struct vga_handle *, int);
89static __inline void _vga_ts_write(struct vga_handle *, int, u_int8_t);
90static __inline u_int8_t _vga_gdc_read(struct vga_handle *, int);
91static __inline void _vga_gdc_write(struct vga_handle *, int, u_int8_t);
92
93#define vga_raw_read(vh, reg) \
94 bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, reg)
95#define vga_raw_write(vh, reg, value) \
96 bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, reg, value)
97
98#define vga_enable(vh) \
99 vga_raw_write(vh, 0, 0x20)
100
101#define vga_reset_state(vh) \
102 (void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10)
103
104static __inline u_int8_t
105_vga_attr_read(struct vga_handle *vh, int reg)
106{
107 u_int8_t res;
108
109 /* reset state */
110 vga_reset_state(vh);
111
112 vga_raw_write(vh, VGA_ATC_INDEX, reg);
113 res = vga_raw_read(vh, VGA_ATC_DATAR);
114
115 /* XXX unneeded? */
116 vga_reset_state(vh);
117
118 vga_enable(vh);
119
120 return res;
121}
122
123static __inline void
124_vga_attr_write(struct vga_handle *vh, int reg, u_int8_t val)
125{
126
127 vga_reset_state(vh);
128
129 vga_raw_write(vh, VGA_ATC_INDEX, reg);
130 vga_raw_write(vh, VGA_ATC_DATAW, val);
131
132 /* XXX unneeded? */
133 vga_reset_state(vh);
134
135 vga_enable(vh);
136}
137
138static __inline u_int8_t
139_vga_ts_read(struct vga_handle *vh, int reg)
140{
141
142 vga_raw_write(vh, VGA_TS_INDEX, reg);
143 return vga_raw_read(vh, VGA_TS_DATA);
144}
145
146static __inline void
147_vga_ts_write(struct vga_handle *vh, int reg, u_int8_t val)
148{
149
150 vga_raw_write(vh, VGA_TS_INDEX, reg);
151 vga_raw_write(vh, VGA_TS_DATA, val);
152}
153
154static __inline u_int8_t
155_vga_gdc_read(struct vga_handle *vh, int reg)
156{
157
158 vga_raw_write(vh, VGA_GDC_INDEX, reg);
159 return vga_raw_read(vh, VGA_GDC_DATA);
160}
161
162static __inline void
163_vga_gdc_write(struct vga_handle *vh, int reg, u_int8_t val)
164{
165
166 vga_raw_write(vh, VGA_GDC_INDEX, reg);
167 vga_raw_write(vh, VGA_GDC_DATA, val);
168}
169
170#define vga_attr_read(vh, reg) \
171 _vga_attr_read(vh, offsetof(struct reg_vgaattr, reg))
172#define vga_attr_write(vh, reg, val) \
173 _vga_attr_write(vh, offsetof(struct reg_vgaattr, reg), val)
174#define vga_ts_read(vh, reg) \
175 _vga_ts_read(vh, offsetof(struct reg_vgats, reg))
176#define vga_ts_write(vh, reg, val) \
177 _vga_ts_write(vh, offsetof(struct reg_vgats, reg), val)
178#define vga_gdc_read(vh, reg) \
179 _vga_gdc_read(vh, offsetof(struct reg_vgagdc, reg))
180#define vga_gdc_write(vh, reg, val) \
181 _vga_gdc_write(vh, offsetof(struct reg_vgagdc, reg), val)
182
183#define vga_6845_read(vh, reg) \
184 pcdisplay_6845_read(&(vh)->vh_ph, reg)
185#define vga_6845_write(vh, reg, val) \
186 pcdisplay_6845_write(&(vh)->vh_ph, reg, val)
187#define _vga_6845_read(vh, reg) \
188 _pcdisplay_6845_read(&(vh)->vh_ph, reg)
189#define _vga_6845_write(vh, reg, val) \
190 _pcdisplay_6845_write(&(vh)->vh_ph, reg, val)
191
192int vga_common_probe(bus_space_tag_t, bus_space_tag_t);
193void vga_common_attach(struct vga_softc *, bus_space_tag_t,
194 bus_space_tag_t, int, int, const struct vga_funcs *);
195#define VGA_QUIRK_ONEFONT 0x01
196#define VGA_QUIRK_NOFASTSCROLL 0x02
197int vga_is_console(bus_space_tag_t, int);
198
199int vga_cnattach(bus_space_tag_t, bus_space_tag_t, int, int);
200int vga_cndetach(void);
201
202void vga_resume(struct vga_softc *);
203
204#ifndef VGA_RASTERCONSOLE
205struct wsscreen_descr;
206void vga_loadchars(struct vga_handle *, int, int, int, int, const char *);
207void vga_readoutchars(struct vga_handle *, int, int, int, int, char *);
208#ifdef VGA_CONSOLE_ATI_BROKEN_FONTSEL
209void vga_copyfont01(struct vga_handle *);
210#endif
211void vga_setfontset(struct vga_handle *, int, int);
212void vga_setscreentype(struct vga_handle *, const struct wsscreen_descr *);
213#else /* !VGA_RASTERCONSOLE */
214void vga_load_builtinfont(struct vga_handle *, u_int8_t *, int, int);
215#endif /* !VGA_RASTERCONSOLE */
216void vga_reset(struct vga_handle *, void (*)(struct vga_handle *));
217void vga_initregs(struct vga_handle *);
218
219extern int vga_no_builtinfont;
220