1 | /** |
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2 | * @file fb_vesa.h |
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3 | * |
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4 | * @ingroup i386_pc386 |
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5 | * |
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6 | * @brief Headers specific for framebuffer drivers utilizing VESA VBE. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (C) 2014 Jan DoleÅŸal (dolezj21@fel.cvut.cz) |
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11 | * CTU in Prague. |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.org/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #include <bsp/vbe3.h> |
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19 | #include <edid.h> |
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20 | |
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21 | #ifndef _FB_VESA_H |
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22 | #define _FB_VESA_H |
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23 | |
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24 | #ifndef ASM /* ASM */ |
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25 | |
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26 | #include <stdint.h> |
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27 | |
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28 | #ifdef __cplusplus |
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29 | extern "C" { |
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30 | #endif /* __cplusplus */ |
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31 | |
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32 | |
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33 | /* ----- Prototypes ----- */ |
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34 | |
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35 | /** |
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36 | * @brief Returns information about graphic's controller in the \p info_block |
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37 | * structure. |
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38 | * |
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39 | * @param[out] info_block pointer to the struct to be filled with |
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40 | * controller information |
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41 | * @param[in] queried_VBE_Version if >0x200 then video bios is asked to fill in |
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42 | * parameters which appeared with second version |
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43 | * of VBE. |
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44 | * @retval ax register content as defined in VBE RETURN STATUS paragraph |
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45 | * @retval -1 error calling graphical bios |
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46 | */ |
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47 | uint32_t VBE_controller_information ( |
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48 | VBE_vbe_info_block *info_block, |
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49 | uint16_t queried_VBE_Version |
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50 | ); |
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51 | |
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52 | /** |
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53 | * @brief Fills structure \p info_block with informations about selected mode in |
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54 | * \p mode_number variable. |
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55 | * |
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56 | * @param[out] info_block pointer to the struct to be filled with |
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57 | * mode information |
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58 | * @param[in] mode_number detailes of this mode to be filled |
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59 | * @retval ax register content as defined in VBE RETURN STATUS paragraph |
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60 | * @retval -1 error calling graphical bios |
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61 | */ |
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62 | uint32_t VBE_mode_information ( |
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63 | VBE_mode_info_block *info_block, |
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64 | uint16_t mode_number |
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65 | ); |
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66 | |
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67 | /** |
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68 | * @brief Sets graphics mode selected. If mode has refreshRateCtrl bit set, than |
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69 | * the \p info_block must be filled accordingly. |
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70 | * |
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71 | * @param[in] mode_number number of mode to be set |
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72 | * @param[in] info_block pointer to struct containing refresh rate control info |
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73 | * @retval ax register content as defined in VBE RETURN STATUS paragraph |
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74 | * @retval -1 error calling graphical bios |
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75 | */ |
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76 | uint32_t VBE_set_mode ( |
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77 | uint16_t mode_number, |
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78 | VBE_CRTC_info_block *info_block |
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79 | ); |
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80 | |
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81 | /** |
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82 | * @brief Get currently set mode number. |
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83 | * |
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84 | * @param[out] mode_number variable to be filled with current mode number |
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85 | * @retval ax register content as defined in VBE RETURN STATUS paragraph |
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86 | * @retval -1 error calling graphical bios |
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87 | */ |
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88 | uint32_t VBE_current_mode ( |
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89 | uint16_t *mode_number |
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90 | ); |
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91 | |
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92 | /** |
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93 | * @brief Gets information about display data channel implemented in the |
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94 | * graphic's controller. |
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95 | * |
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96 | * @param[in] controller_unit_number |
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97 | * @param[out] seconds_to_transfer_EDID_block approximate time to transfer one |
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98 | * EDID block rounded up to seconds |
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99 | * @param[out] DDC_level_supported contains DDC version supported and |
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100 | * screen blanking state during transfer |
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101 | * @retval ax register content as defined in VBE RETURN STATUS paragraph |
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102 | * @retval -1 error calling graphical bios |
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103 | */ |
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104 | uint32_t VBE_report_DDC_capabilities ( |
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105 | uint16_t controller_unit_number, |
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106 | uint8_t *seconds_to_transfer_EDID_block, |
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107 | uint8_t *DDC_level_supported |
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108 | ); |
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109 | |
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110 | /** |
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111 | * @brief Reads selected EDID block from display attached to controller's |
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112 | * interface. |
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113 | * |
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114 | * @param[in] controller_unit_number |
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115 | * @param[in] EDID_block_number block no. to be read from the display |
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116 | * @param[out] buffer place to store block fetched from the display |
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117 | * @retval ax register content as defined in VBE RETURN STATUS paragraph |
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118 | * @retval -1 error calling graphical bios |
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119 | */ |
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120 | uint32_t VBE_read_EDID ( |
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121 | uint16_t controller_unit_number, |
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122 | uint16_t EDID_block_number, |
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123 | EDID_edid1 *buffer |
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124 | ); |
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125 | |
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126 | #ifdef __cplusplus |
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127 | } |
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128 | #endif /* __cplusplus */ |
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129 | |
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130 | #endif /* ASM */ |
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131 | |
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132 | #endif /* _FB_VESA_H */ |
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