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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 54 | pj | 1 | /* |
| 2 | * ramdac.c: |
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| 3 | * |
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| 4 | * This file contains RAMDAC definitions of type DacMethods for |
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| 5 | * various DACs. |
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| 6 | * |
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| 7 | * Note that the restoreState function is the only function that |
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| 8 | * should program the DAC registers; the initializeState function |
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| 9 | * should merely define the values that will be written in a |
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| 10 | * subsequent call of the restore funtion. |
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| 11 | */ |
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| 12 | |||
| 13 | #include <stdlib.h> |
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| 14 | //#include <stdio.h> |
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| 15 | #include "libvga.h" |
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| 16 | |||
| 17 | #include "timing.h" |
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| 18 | #include "vgaregs.h" |
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| 19 | #include "driver.h" /* for __svgalib_driver_report */ |
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| 20 | #include "ramdac.h" |
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| 21 | |||
| 22 | /* |
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| 23 | * The following function probes the DACs in daclist, which must be |
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| 24 | * terminated by NULL. It returns the detected DAC if successful, NULL |
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| 25 | * otherwise. The detected DAC is also initialized. |
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| 26 | */ |
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| 27 | |||
| 28 | DacMethods *__svgalib_probeDacs(DacMethods ** dacs_to_probe) |
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| 29 | { |
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| 30 | /* Probe for a RAMDAC. */ |
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| 31 | for (;;) { |
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| 32 | DacMethods *dac; |
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| 33 | dac = *dacs_to_probe; |
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| 34 | if (dac == NULL) |
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| 35 | /* None found. */ |
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| 36 | return NULL; |
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| 37 | if (dac->probe()) { |
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| 38 | dac->initialize(); |
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| 39 | return dac; |
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| 40 | } |
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| 41 | dacs_to_probe++; |
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| 42 | } |
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| 43 | } |
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| 44 | |||
| 45 | int __svgalib_setDacSpeed(int dacspeed, int defspeed) |
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| 46 | { |
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| 47 | if (!dacspeed) { |
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| 48 | if (__svgalib_driver_report) |
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| 49 | printk(KERN_INFO "svgalib: Assuming %dMHz DAC.\n", defspeed / 1000); |
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| 50 | dacspeed = defspeed; |
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| 51 | } else { |
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| 52 | if (__svgalib_driver_report) |
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| 53 | printk(KERN_INFO "svgalib: DAC speed set to %dMHz.\n", dacspeed / 1000); |
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| 54 | } |
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| 55 | return dacspeed; |
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| 56 | } |
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| 57 | |||
| 58 | #ifndef __OPTIMIZE__ /* otherwise inlined from ramdac.h */ |
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| 59 | void _ramdac_dactocomm(void) |
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| 60 | { |
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| 61 | inb(PEL_IW); |
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| 62 | inb(PEL_MSK); |
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| 63 | inb(PEL_MSK); |
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| 64 | inb(PEL_MSK); |
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| 65 | inb(PEL_MSK); |
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| 66 | } |
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| 67 | |||
| 68 | void _ramdac_dactopel(void) |
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| 69 | { |
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| 70 | inb(PEL_IW); |
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| 71 | } |
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| 72 | |||
| 73 | unsigned char _ramdac_setcomm(unsigned char data) |
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| 74 | { |
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| 75 | _ramdac_dactocomm(); |
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| 76 | outb(PEL_MSK, data); |
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| 77 | _ramdac_dactocomm(); |
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| 78 | return inb(PEL_MSK); |
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| 79 | } |
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| 80 | #endif |
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| 81 | |||
| 82 | /* |
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| 83 | * List of all DACs. |
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| 84 | */ |
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| 85 | |||
| 86 | DacMethods *__svgalib_all_dacs[] = |
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| 87 | { |
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| 88 | #ifdef INCLUDE_NORMAL_DAC |
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| 89 | &__svgalib_normal_dac_methods, |
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| 90 | #endif |
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| 91 | #ifdef INCLUDE_S3_SDAC_DAC |
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| 92 | &__svgalib_S3_SDAC_methods, |
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| 93 | #endif |
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| 94 | #ifdef INCLUDE_S3_GENDAC_DAC |
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| 95 | &__svgalib_S3_GENDAC_methods, |
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| 96 | #endif |
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| 97 | #ifdef INCLUDE_S3_TRIO64_DAC |
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| 98 | &__svgalib_Trio64_methods, |
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| 99 | #endif |
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| 100 | #ifdef INCLUDE_SIERRA_DAC |
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| 101 | &__svgalib_Sierra_32K_methods, |
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| 102 | #endif |
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| 103 | #ifdef INCLUDE_SC15025_DAC |
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| 104 | &__svgalib_SC15025_methods, |
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| 105 | #endif |
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| 106 | #ifdef INCLUDE_ATT20C490_DAC |
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| 107 | &__svgalib_ATT20C490_methods, |
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| 108 | #endif |
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| 109 | #ifdef INCLUDE_ATT20C498_DAC |
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| 110 | &__svgalib_ATT20C498_methods, |
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| 111 | #endif |
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| 112 | #ifdef INCLUDE_ICW_DAC |
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| 113 | &__svgalib_ICW_methods, |
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| 114 | #endif |
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| 115 | #ifdef INCLUDE_SC1148X_DAC |
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| 116 | &__svgalib_SC1148X_methods, |
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| 117 | #endif |
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| 118 | #ifdef INCLUDE_ICS_GENDAC_DAC |
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| 119 | &__svgalib_ICS_GENDAC_methods, |
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| 120 | #endif |
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| 121 | NULL |
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| 122 | }; |