The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/vgavar.h

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    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
  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
  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
  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
  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
  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
  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

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