1 | /* |
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2 | * RTEMS for Nintendo DS framebuffer display driver. |
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3 | * |
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4 | * Copyright (c) 2008 by Matthieu Bucchianeri <mbucchia@gmail.com> |
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5 | * |
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6 | * The license and distribution terms for this file may be |
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7 | * found in the file LICENSE in this distribution or at |
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8 | * |
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9 | * http://www.rtems.com/license/LICENSE |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #include <stdlib.h> |
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15 | #include <stdio.h> |
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16 | #include <errno.h> |
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17 | #include <sys/types.h> |
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18 | |
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19 | #include <bsp.h> |
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20 | #include "../irq/irq.h" |
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21 | #include <rtems/libio.h> |
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22 | #include <nds.h> |
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23 | |
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24 | #include <rtems/fb.h> |
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25 | #include <nds/fb.h> |
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26 | |
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27 | /* |
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28 | * screen information for the driver (fb0). |
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29 | */ |
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30 | |
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31 | static struct fb_var_screeninfo fb_var_info = { |
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32 | .xres = SCREEN_WIDTH, /* screen size x, y */ |
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33 | .yres = SCREEN_HEIGHT, |
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34 | .bits_per_pixel = 16 /* bits per pixel */ |
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35 | }; |
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36 | |
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37 | static struct fb_fix_screeninfo fb_fix_info = { |
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38 | .smem_start = (void *) VRAM_A, /* buffer pointer */ |
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39 | .smem_len = 0x18000, /* buffer size */ |
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40 | .type = FB_TYPE_PACKED_PIXELS, /* type of dsplay */ |
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41 | .visual = FB_VISUAL_TRUECOLOR, /* color scheme used */ |
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42 | .line_length = SCREEN_WIDTH /* pixels per line (redundant with xres ?) */ |
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43 | }; |
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44 | |
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45 | /* |
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46 | * screen information for the driver (fb1). |
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47 | */ |
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48 | |
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49 | static struct fb_var_screeninfo fb_var_info2 = { |
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50 | .xres = SCREEN_WIDTH, /* screen size x, y */ |
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51 | .yres = SCREEN_HEIGHT, |
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52 | .bits_per_pixel = 16 /* bits per pixel */ |
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53 | }; |
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54 | |
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55 | static struct fb_fix_screeninfo fb_fix_info2 = { |
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56 | .smem_start = (void *) VRAM_B, /* buffer pointer */ |
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57 | .smem_len = 0x18000, /* buffer size */ |
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58 | .type = FB_TYPE_PACKED_PIXELS, /* type of dsplay */ |
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59 | .visual = FB_VISUAL_TRUECOLOR, /* color scheme used */ |
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60 | .line_length = SCREEN_WIDTH /* pixels per line (redundant with xres ?) */ |
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61 | }; |
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62 | |
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63 | |
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64 | /* |
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65 | * fbds device driver initialize entry point. |
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66 | */ |
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67 | |
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68 | rtems_device_driver |
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69 | fbds_initialize (rtems_device_major_number major, |
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70 | rtems_device_minor_number minor, void *arg) |
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71 | { |
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72 | rtems_status_code status; |
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73 | |
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74 | printk ("[+] framebuffer started\n"); |
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75 | |
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76 | /* register the devices */ |
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77 | status = rtems_io_register_name ("/dev/fb0", major, 0); |
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78 | if (status != RTEMS_SUCCESSFUL) { |
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79 | printk ("[!] error registering framebuffer\n"); |
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80 | rtems_fatal_error_occurred (status); |
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81 | } |
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82 | status = rtems_io_register_name ("/dev/fb1", major, 1); |
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83 | if (status != RTEMS_SUCCESSFUL) { |
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84 | printk ("[!] error registering framebuffer\n"); |
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85 | rtems_fatal_error_occurred (status); |
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86 | } |
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87 | return RTEMS_SUCCESSFUL; |
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88 | } |
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89 | |
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90 | /* |
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91 | * fbds device driver open operation. |
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92 | */ |
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93 | |
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94 | rtems_device_driver |
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95 | fbds_open (rtems_device_major_number major, |
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96 | rtems_device_minor_number minor, void *arg) |
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97 | { |
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98 | printk ("[#] entering graphic mode on fb%d\n", minor); |
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99 | if (!minor) { |
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100 | videoSetMode (MODE_FB0); |
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101 | vramSetBankA (VRAM_A_LCD); |
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102 | memset ((void *)fb_fix_info.smem_start, 0, fb_fix_info.smem_len); |
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103 | } else { |
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104 | videoSetModeSub (MODE_FB0); |
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105 | vramSetBankB (VRAM_B_LCD); |
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106 | memset ((void *)fb_fix_info2.smem_start, 0, fb_fix_info2.smem_len); |
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107 | } |
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108 | return RTEMS_SUCCESSFUL; |
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109 | } |
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110 | |
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111 | /* |
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112 | * fbds device driver close operation. |
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113 | */ |
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114 | |
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115 | rtems_device_driver |
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116 | fbds_close (rtems_device_major_number major, |
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117 | rtems_device_minor_number minor, void *arg) |
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118 | { |
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119 | printk ("[#] leaving graphic mode on fb%d\n", minor); |
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120 | if (!minor) { |
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121 | memset ((void *)fb_fix_info.smem_start, 0, fb_fix_info.smem_len); |
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122 | } |
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123 | else { |
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124 | memset ((void *)fb_fix_info2.smem_start, 0, fb_fix_info2.smem_len); |
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125 | /* back to console */ |
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126 | videoSetModeSub (MODE_0_2D | DISPLAY_BG0_ACTIVE); |
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127 | vramSetBankC (VRAM_C_SUB_BG); |
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128 | } |
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129 | |
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130 | return RTEMS_SUCCESSFUL; |
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131 | } |
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132 | |
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133 | /* |
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134 | * fbds device driver read operation. |
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135 | */ |
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136 | |
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137 | rtems_device_driver |
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138 | fbds_read (rtems_device_major_number major, |
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139 | rtems_device_minor_number minor, void *arg) |
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140 | { |
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141 | rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *) arg; |
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142 | rw_args->bytes_moved = 0; |
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143 | |
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144 | return RTEMS_SUCCESSFUL; |
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145 | } |
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146 | |
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147 | /* |
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148 | * fbds device driver write operation. |
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149 | */ |
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150 | |
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151 | rtems_device_driver |
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152 | fbds_write (rtems_device_major_number major, |
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153 | rtems_device_minor_number minor, void *arg) |
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154 | { |
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155 | rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *) arg; |
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156 | rw_args->bytes_moved = 0; |
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157 | |
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158 | return RTEMS_SUCCESSFUL; |
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159 | } |
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160 | |
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161 | /* |
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162 | * ioctl entry point. |
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163 | */ |
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164 | |
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165 | rtems_device_driver |
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166 | fbds_control (rtems_device_major_number major, |
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167 | rtems_device_minor_number minor, void *arg) |
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168 | { |
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169 | rtems_libio_ioctl_args_t *args = arg; |
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170 | |
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171 | /* XXX check minor */ |
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172 | |
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173 | switch (args->command) { |
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174 | case FBIOGET_VSCREENINFO: |
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175 | memcpy (args->buffer, minor ? &fb_var_info2 : &fb_var_info, sizeof (fb_var_info)); |
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176 | args->ioctl_return = 0; |
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177 | break; |
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178 | case FBIOGET_FSCREENINFO: |
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179 | memcpy (args->buffer, minor ? &fb_fix_info2 : &fb_fix_info, sizeof (fb_fix_info)); |
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180 | args->ioctl_return = 0; |
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181 | break; |
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182 | case FBIOGETCMAP: |
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183 | args->ioctl_return = get_palette( args->buffer ); |
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184 | break; |
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185 | case FBIOPUTCMAP: |
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186 | args->ioctl_return = set_palette( args->buffer ); |
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187 | break; |
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188 | |
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189 | /* no break on purpose */ |
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190 | default: |
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191 | args->ioctl_return = 0; |
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192 | break; |
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193 | |
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194 | } |
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195 | return RTEMS_SUCCESSFUL; |
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196 | } |
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