1 /*
2 * ramdac.h:
3 *
4 * Structures and functions for programmable ramdac support.
5 */
6
7 /* DacMethods type. */
8
9 typedef struct {
10 int id;
11 char *name;
12 int flags;
13 /*
14 * The following function tries to detect the DAC;
15 * returns nonzero if succesful.
16 */
17 int (*probe) (void);
18 /*
19 * The following function initializes the DAC; it is usually
20 * called once after detection.
21 */
22 void (*initialize) (void);
23 /*
24 * The following function fills in dot clock limits, and
25 * mapping functions for the raw clock and horizontal
26 * CRTC timing, in the cardspecs structure.
27 *
28 * dacspeed is the max pixel clock in kHz the dac can handle,
29 * or 0 for default.
30 */
31 void (*qualifyCardSpecs) (CardSpecs * cardspecs, int dacspeed);
32 /*
33 * The following function saves RAMDAC registers into regs.
34 */
35 void (*saveState) (unsigned char *regs);
36 /*
37 * The following function sets the RAMDAC registers with the
38 * values from regs.
39 */
40 void (*restoreState) (const unsigned char *regs);
41 /*
42 * The following function sets up the RAMDAC register values
43 * for the desired color operating mode. If the DAC has
44 * programmable clocks, it should also program the clock.
45 */
46 void (*initializeState) (unsigned char *regs, int bpp, int colormode,
47 int pixelclock);
48 int stateSize; /* Size in bytes of the state (saved registers). */
49 } DacMethods;
50
51 /* IDs */
52
53 #define NORMAL_DAC 1
54 #define S3_GENDAC 2 /* S3-GenDAC (8-bit DAC). */
55 #define S3_SDAC 3 /* S3-SDAC (16-bit DAC). */
56 #define TRIO64 4 /* Trio64 internal DAC. */
57 #define SIERRA_32K 5 /* Basic DAC with 32K color mode support. */
58 #define ATT20C490 6 /* Standard AT&T 8-bit DAC with truecolor. */
59 #define ATT20C498 7 /* Standard AT&T 16-bit DAC. */
60 #define IC_WORKS 8 /* IC Works DAC (16-bit ZoomDac). */
61 #define SIERRA_15025 9 /* Sierra SC15025/26 DAC. */
62 #define IBMRGB52x 10 /* IBM RGB52x Palette DAC. */
63 #define SIERRA_1148X 11 /* Sierra SC1148x DAC. */
64
65 /* Flags. */
66
67 #define DAC_HAS_PROGRAMMABLE_CLOCKS 0x1
68
69 /* Color modes. */
70
71 #define CLUT8_6 0
72 #define CLUT8_8 1
73 #define RGB16_555 2
74 #define RGB16_565 3
75 #define RGB24_888_B 4 /* 3 bytes per pixel, blue byte first. */
76 #define RGB32_888_B 5 /* 4 bytes per pixel. */
77
78 /* State size */
79 #define MAX_DAC_STATE 0x101 /* IBMRGB has this many */
80
81 /* RAMDAC methods */
82
83 #ifdef INCLUDE_NORMAL_DAC
84 extern DacMethods __svgalib_normal_dac_methods;
85 #endif
86 #ifdef INCLUDE_S3_SDAC_DAC
87 extern DacMethods __svgalib_S3_SDAC_methods;
88 #endif
89 #ifdef INCLUDE_S3_GENDAC_DAC
90 extern DacMethods __svgalib_S3_GENDAC_methods;
91 #endif
92 #ifdef INCLUDE_S3_TRIO64_DAC
93 extern DacMethods __svgalib_Trio64_methods;
94 #endif
95 #ifdef INCLUDE_SIERRA_DAC
96 extern DacMethods __svgalib_Sierra_32K_methods;
97 #endif
98 #ifdef INCLUDE_SC15025_DAC
99 extern DacMethods __svgalib_SC15025_methods;
100 #endif
101 #ifdef INCLUDE_ATT20C490_DAC
102 extern DacMethods __svgalib_ATT20C490_methods;
103 #endif
104 #ifdef INCLUDE_ATT20C498_DAC
105 extern DacMethods __svgalib_ATT20C498_methods;
106 #endif
107 #ifdef INCLUDE_ICW_DAC
108 extern DacMethods __svgalib_ICW_methods;
109 #endif
110 #ifdef INCLUDE_IBMRGB52x_DAC
111 extern DacMethods __svgalib_IBMRGB52x_methods;
112 #endif
113 #ifdef INCLUDE_SC1148X_DAC
114 extern DacMethods __svgalib_SC1148X_methods;
115 #endif
116
117 extern DacMethods *__svgalib_all_dacs[]; /* List of all defined DACs. */
118
119 /* Functions defined in ramdac.c. */
120
121 /*
122 * The following function probes the DACs in daclist, which must be
123 * terminated by NULL. It returns the detected DAC if succesful, NULL
124 * otherwise. The detected DAC is also initialized.
125 */
126
127 DacMethods *__svgalib_probeDacs(DacMethods ** daclist);
128
129 /*
130 * Internal functions (not meant for export, but no such mechanism in C)
131 */
132 int __svgalib_setDacSpeed(int dacspeed, int defspeed);
133
134 void __svgalib_Sierra_32K_savestate(unsigned char *regs);
135 void __svgalib_Sierra_32K_restorestate(const unsigned char *regs);
136
137 int __svgalib_att20c490_map_clock(int bpp, int pixelclock);
138 int __svgalib_att20c490_map_horizontal_crtc(int bpp, int pixelclock, int htiming);
139
140 #ifdef __OPTIMIZE__
_ramdac_dactocomm(void)141 static __inline__ void _ramdac_dactocomm(void)
142 {
143 inb(PEL_IW);
144 inb(PEL_MSK);
145 inb(PEL_MSK);
146 inb(PEL_MSK);
147 inb(PEL_MSK);
148 }
149
_ramdac_dactopel(void)150 static __inline__ void _ramdac_dactopel(void)
151 {
152 inb(PEL_IW);
153 }
154
_ramdac_setcomm(unsigned char data)155 static __inline__ unsigned char _ramdac_setcomm(unsigned char data)
156 {
157 _ramdac_dactocomm();
158 outb(PEL_MSK, data);
159 _ramdac_dactocomm();
160 return inb(PEL_MSK);
161 }
162 #else
163 void _ramdac_dactocomm(void);
164 void _ramdac_dactopel(void);
165 unsigned char _ramdac_setcomm(unsigned char data);
166 #endif
167