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vgavar.h revision 1.10 
      1 /* $NetBSD: vgavar.h,v 1.10 2001/12/29 17:40:35 junyoung 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 #include <sys/callout.h>
     31 
     32 struct vga_handle {
     33 	struct pcdisplay_handle vh_ph;
     34 	bus_space_handle_t vh_ioh_vga, vh_allmemh;
     35 	int vh_mono;
     36 };
     37 #define vh_iot 		vh_ph.ph_iot
     38 #define vh_memt 	vh_ph.ph_memt
     39 #define vh_ioh_6845 	vh_ph.ph_ioh_6845
     40 #define vh_memh 	vh_ph.ph_memh
     41 
     42 struct vga_funcs {
     43 	int (*vf_ioctl)(void *, u_long, caddr_t, int, struct proc *);
     44 	paddr_t (*vf_mmap)(void *, off_t, int);
     45 };
     46 
     47 struct vga_config {
     48 	struct vga_handle hdl;
     49 	struct vga_softc *softc;
     50 
     51 	int nscreens;
     52 	LIST_HEAD(, vgascreen) screens;
     53 	struct vgascreen *active; /* current display */
     54 	const struct wsscreen_descr *currenttype;
     55 	int currentfontset1, currentfontset2;
     56 
     57 	int vc_biosmapped;
     58 	bus_space_tag_t vc_biostag;
     59 	bus_space_handle_t vc_bioshdl;
     60 
     61 	struct egavga_font *vc_fonts[8]; /* currently loaded */
     62 	TAILQ_HEAD(, egavga_font) vc_fontlist; /* LRU queue */
     63 
     64 	struct vgascreen *wantedscreen;
     65 	void (*switchcb)(void *, int, int);
     66 	void *switchcbarg;
     67 
     68 	int vc_type;
     69 	const struct vga_funcs *vc_funcs;
     70 
     71 	struct callout vc_switch_callout;
     72 };
     73 
     74 struct vga_softc {
     75 	struct device sc_dev;
     76 	struct vga_config *sc_vc;
     77 };
     78 
     79 static inline u_int8_t 	_vga_attr_read(struct vga_handle *, int);
     80 static inline void 	_vga_attr_write(struct vga_handle *, int, u_int8_t);
     81 static inline u_int8_t 	_vga_ts_read(struct vga_handle *, int);
     82 static inline void 	_vga_ts_write(struct vga_handle *, int, u_int8_t);
     83 static inline u_int8_t 	_vga_gdc_read(struct vga_handle *, int);
     84 static inline void 	_vga_gdc_write(struct vga_handle *, int, u_int8_t);
     85 static inline u_int8_t 	_vga_crtc_read(struct vga_handle *, int);
     86 static inline void 	_vga_crtc_write(struct vga_handle *, int, u_int8_t);
     87 
     88 static inline u_int8_t
     89 _vga_attr_read(struct vga_handle *vh, int reg)
     90 {
     91 	u_int8_t res;
     92 
     93 	/* reset state */
     94 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
     95 
     96 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_INDEX, reg);
     97 	res = bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_DATAR);
     98 
     99 	/* reset state XXX unneeded? */
    100 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
    101 
    102 	/* enable */
    103 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, 0, 0x20);
    104 
    105 	return (res);
    106 }
    107 
    108 static inline void
    109 _vga_attr_write(struct vga_handle *vh, int reg, u_int8_t val)
    110 {
    111 	/* reset state */
    112 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
    113 
    114 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_INDEX, reg);
    115 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_ATC_DATAW, val);
    116 
    117 	/* reset state XXX unneeded? */
    118 	(void) bus_space_read_1(vh->vh_iot, vh->vh_ioh_6845, 10);
    119 
    120 	/* enable */
    121 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, 0, 0x20);
    122 }
    123 
    124 static inline u_int8_t
    125 _vga_ts_read(struct vga_handle *vh, int reg)
    126 {
    127 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_INDEX, reg);
    128 	return (bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_DATA));
    129 }
    130 
    131 static inline void
    132 _vga_ts_write(struct vga_handle *vh, int reg, u_int8_t val)
    133 {
    134 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_INDEX, reg);
    135 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_TS_DATA, val);
    136 }
    137 
    138 static inline u_int8_t
    139 _vga_gdc_read(struct vga_handle *vh, int reg)
    140 {
    141 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_INDEX, reg);
    142 	return (bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_DATA));
    143 }
    144 
    145 static inline void
    146 _vga_gdc_write(struct vga_handle *vh, int reg, u_int8_t val)
    147 {
    148 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_INDEX, reg);
    149 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_GDC_DATA, val);
    150 }
    151 
    152 static inline u_int8_t
    153 _vga_crtc_read(struct vga_handle *vh, int reg)
    154 {
    155 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_CRTC_INDEX, reg);
    156 	return (bus_space_read_1(vh->vh_iot, vh->vh_ioh_vga, VGA_CRTC_DATA));
    157 }
    158 
    159 static inline void
    160 _vga_crtc_write(struct vga_handle *vh, int reg, u_int8_t val)
    161 {
    162 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_CRTC_INDEX, reg);
    163 	bus_space_write_1(vh->vh_iot, vh->vh_ioh_vga, VGA_CRTC_DATA, val);
    164 }
    165 
    166 #define vga_attr_read(vh, reg) \
    167 	_vga_attr_read(vh, offsetof(struct reg_vgaattr, reg))
    168 #define vga_attr_write(vh, reg, val) \
    169 	_vga_attr_write(vh, offsetof(struct reg_vgaattr, reg), val)
    170 #define vga_ts_read(vh, reg) \
    171 	_vga_ts_read(vh, offsetof(struct reg_vgats, reg))
    172 #define vga_ts_write(vh, reg, val) \
    173 	_vga_ts_write(vh, offsetof(struct reg_vgats, reg), val)
    174 #define vga_gdc_read(vh, reg) \
    175 	_vga_gdc_read(vh, offsetof(struct reg_vgagdc, reg))
    176 #define vga_gdc_write(vh, reg, val) \
    177 	_vga_gdc_write(vh, offsetof(struct reg_vgagdc, reg), val)
    178 
    179 #define vga_6845_read(vh, reg) \
    180 	pcdisplay_6845_read(&(vh)->vh_ph, reg)
    181 #define vga_6845_write(vh, reg, val) \
    182 	pcdisplay_6845_write(&(vh)->vh_ph, reg, val)
    183 
    184 int	vga_common_probe(bus_space_tag_t, bus_space_tag_t);
    185 void	vga_common_attach(struct vga_softc *, bus_space_tag_t,
    186 			  bus_space_tag_t, int, const struct vga_funcs *);
    187 int	vga_is_console(bus_space_tag_t, int);
    188 
    189 int	vga_cnattach(bus_space_tag_t, bus_space_tag_t, int, int);
    190 
    191 struct wsscreen_descr;
    192 void 	vga_loadchars(struct vga_handle *, int, int, int, int, char *);
    193 void 	vga_setfontset(struct vga_handle *, int, int);
    194 void 	vga_setscreentype(struct vga_handle *, const struct wsscreen_descr *);
    195