1 | /* |
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2 | * By Yang Xi <hiyangxi@gmail.com>. |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.org/license/LICENSE. |
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7 | */ |
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8 | |
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9 | #include <stdlib.h> |
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10 | #include <stdio.h> |
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11 | #include <errno.h> |
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12 | #include <sys/types.h> |
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13 | #include <pthread.h> |
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14 | #include <string.h> |
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15 | |
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16 | #include <pxa255.h> |
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17 | #include <bsp.h> |
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18 | #include <rtems/libio.h> |
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19 | #include <rtems/bspIo.h> |
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20 | |
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21 | #include <rtems.h> |
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22 | #include <rtems/inttypes.h> |
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23 | #include <rtems/fb.h> |
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24 | #include <rtems/framebuffer.h> |
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25 | |
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26 | #define SCREEN_WIDTH 640 |
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27 | #define SCREEN_HEIGHT 480 |
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28 | #define BPP 16 |
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29 | #define LCD_DMA_POINTER (0xa0000000 + 62*(1<<20) + 0x1000) |
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30 | #define LCD_BUFFER_SIZE (SCREEN_WIDTH*SCREEN_HEIGHT*2) |
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31 | |
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32 | /* mutex attribure */ |
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33 | pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; |
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34 | |
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35 | static struct fb_var_screeninfo fb_var = |
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36 | { |
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37 | .xres = SCREEN_WIDTH, |
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38 | .yres = SCREEN_HEIGHT, |
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39 | .bits_per_pixel = BPP |
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40 | }; |
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41 | |
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42 | static struct fb_fix_screeninfo fb_fix = |
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43 | { |
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44 | .smem_start = (volatile char *)LCD_DMA_POINTER, |
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45 | .smem_len = LCD_BUFFER_SIZE, |
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46 | .type = FB_TYPE_PACKED_PIXELS, |
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47 | .visual = FB_VISUAL_TRUECOLOR, |
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48 | .line_length = SCREEN_WIDTH * (BPP/8) |
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49 | }; |
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50 | |
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51 | static uint16_t red16[] = { |
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52 | 0x0000, 0x0000, 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0xaaaa, 0xaaaa, |
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53 | 0x5555, 0x5555, 0x5555, 0x5555, 0xffff, 0xffff, 0xffff, 0xffff |
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54 | }; |
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55 | static uint16_t green16[] = { |
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56 | 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0x0000, 0x0000, 0x5555, 0xaaaa, |
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57 | 0x5555, 0x5555, 0xffff, 0xffff, 0x5555, 0x5555, 0xffff, 0xffff |
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58 | }; |
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59 | static uint16_t blue16[] = { |
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60 | 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, |
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61 | 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff |
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62 | }; |
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63 | |
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64 | static void enable_fbskyeye(void) |
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65 | { |
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66 | LCCR1 &= ~LCCR1_PPL; |
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67 | LCCR1 |= (SCREEN_WIDTH -1 ) & LCCR1_PPL; |
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68 | LCCR2 &= ~LCCR2_LPP; |
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69 | LCCR2 |= (SCREEN_HEIGHT/2 -1) & LCCR2_LPP; |
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70 | LCCR3 &= ~LCCR3_BPP; |
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71 | LCCR3 |= 4<<24; |
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72 | FDADR0 = LCD_DMA_POINTER - 0x1000; |
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73 | LCCR0 |= LCCR0_ENB; |
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74 | } |
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75 | |
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76 | |
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77 | static void disable_fbskyeye(void) |
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78 | { |
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79 | LCCR0 &= ~LCCR0_ENB; |
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80 | } |
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81 | |
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82 | static int get_fix_screen_info( struct fb_fix_screeninfo *info ) |
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83 | { |
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84 | *info = fb_fix; |
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85 | return 0; |
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86 | } |
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87 | |
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88 | static int get_var_screen_info( struct fb_var_screeninfo *info ) |
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89 | { |
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90 | *info = fb_var; |
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91 | return 0; |
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92 | } |
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93 | |
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94 | rtems_device_driver |
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95 | frame_buffer_initialize(rtems_device_major_number major, |
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96 | rtems_device_minor_number minor, |
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97 | void *arg) |
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98 | { |
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99 | rtems_status_code status; |
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100 | |
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101 | printk( "FBSKYEYE -- driver initializing..\n" ); |
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102 | /* |
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103 | * Register the device |
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104 | */ |
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105 | status = rtems_io_register_name (FRAMEBUFFER_DEVICE_0_NAME, major, 0); |
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106 | if (status != RTEMS_SUCCESSFUL) |
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107 | { |
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108 | printk("Error registering FBSKYEYE device!\n"); |
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109 | rtems_fatal_error_occurred( status ); |
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110 | } |
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111 | return RTEMS_SUCCESSFUL; |
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112 | } |
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113 | |
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114 | |
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115 | rtems_device_driver |
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116 | frame_buffer_open( rtems_device_major_number major, |
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117 | rtems_device_minor_number minor, |
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118 | void *arg) |
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119 | { |
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120 | if (pthread_mutex_trylock(&mutex)== 0){ |
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121 | /* restore previous state. for VGA this means return to text mode. |
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122 | * leave out if graphics hardware has been initialized in |
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123 | * frame_buffer_initialize() |
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124 | */ |
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125 | printk( "FBSKYEYE open called.\n" ); |
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126 | enable_fbskyeye(); |
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127 | return RTEMS_SUCCESSFUL; |
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128 | } |
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129 | |
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130 | return RTEMS_UNSATISFIED; |
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131 | } |
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132 | |
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133 | |
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134 | rtems_device_driver |
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135 | frame_buffer_close(rtems_device_major_number major, |
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136 | rtems_device_minor_number minor, |
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137 | void *arg) |
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138 | { |
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139 | if (pthread_mutex_unlock(&mutex) == 0){ |
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140 | /* restore previous state. for VGA this means return to text mode. |
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141 | * leave out if graphics hardware has been initialized in |
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142 | * frame_buffer_initialize() */ |
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143 | printk( "fbskyeye close called.\n" ); |
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144 | disable_fbskyeye(); |
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145 | return RTEMS_SUCCESSFUL; |
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146 | } |
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147 | |
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148 | return RTEMS_UNSATISFIED; |
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149 | } |
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150 | |
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151 | rtems_device_driver |
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152 | frame_buffer_read( rtems_device_major_number major, |
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153 | rtems_device_minor_number minor, |
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154 | void *arg) |
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155 | { |
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156 | rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; |
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157 | rw_args->bytes_moved = ((rw_args->offset + rw_args->count) > fb_fix.smem_len ) ? (fb_fix.smem_len - rw_args->offset) : rw_args->count; |
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158 | memcpy(rw_args->buffer, (const void *) (fb_fix.smem_start + rw_args->offset), rw_args->bytes_moved); |
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159 | return RTEMS_SUCCESSFUL; |
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160 | } |
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161 | |
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162 | rtems_device_driver |
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163 | frame_buffer_write( rtems_device_major_number major, |
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164 | rtems_device_minor_number minor, |
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165 | void * arg) |
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166 | { |
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167 | rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; |
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168 | rw_args->bytes_moved = ((rw_args->offset + rw_args->count) > fb_fix.smem_len ) ? (fb_fix.smem_len - rw_args->offset) : rw_args->count; |
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169 | memcpy( (void *) (fb_fix.smem_start + rw_args->offset), rw_args->buffer, rw_args->bytes_moved); |
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170 | return RTEMS_SUCCESSFUL; |
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171 | } |
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172 | |
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173 | static int get_palette( struct fb_cmap *cmap ) |
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174 | { |
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175 | uint32_t i; |
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176 | |
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177 | if ( cmap->start + cmap->len >= 16 ) |
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178 | return 1; |
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179 | |
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180 | for( i = 0; i < cmap->len; i++ ) { |
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181 | cmap->red[ cmap->start + i ] = red16[ cmap->start + i ]; |
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182 | cmap->green[ cmap->start + i ] = green16[ cmap->start + i ]; |
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183 | cmap->blue[ cmap->start + i ] = blue16[ cmap->start + i ]; |
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184 | } |
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185 | return 0; |
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186 | } |
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187 | |
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188 | static int set_palette( struct fb_cmap *cmap ) |
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189 | { |
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190 | uint32_t i; |
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191 | |
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192 | if ( cmap->start + cmap->len >= 16 ) |
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193 | return 1; |
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194 | |
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195 | for( i = 0; i < cmap->len; i++ ) { |
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196 | red16[ cmap->start + i ] = cmap->red[ cmap->start + i ]; |
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197 | green16[ cmap->start + i ] = cmap->green[ cmap->start + i ]; |
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198 | blue16[ cmap->start + i ] = cmap->blue[ cmap->start + i ]; |
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199 | } |
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200 | return 0; |
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201 | } |
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202 | |
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203 | |
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204 | rtems_device_driver |
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205 | frame_buffer_control( rtems_device_major_number major, |
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206 | rtems_device_minor_number minor, |
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207 | void * arg |
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208 | ) |
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209 | { |
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210 | rtems_libio_ioctl_args_t *args = arg; |
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211 | printk( |
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212 | "FBSKYEYE ioctl called, cmd=%" PRIdioctl_command_t "\n", |
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213 | args->command |
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214 | ); |
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215 | switch( args->command ) |
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216 | { |
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217 | case FBIOGET_FSCREENINFO: |
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218 | args->ioctl_return = get_fix_screen_info( ( struct fb_fix_screeninfo * ) args->buffer ); |
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219 | break; |
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220 | case FBIOGET_VSCREENINFO: |
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221 | args->ioctl_return = get_var_screen_info( ( struct fb_var_screeninfo * ) args->buffer ); |
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222 | break; |
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223 | case FBIOPUT_VSCREENINFO: |
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224 | /* not implemented yet*/ |
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225 | args->ioctl_return = -1; |
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226 | return RTEMS_UNSATISFIED; |
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227 | case FBIOGETCMAP: |
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228 | args->ioctl_return = get_palette( ( struct fb_cmap * ) args->buffer ); |
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229 | break; |
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230 | case FBIOPUTCMAP: |
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231 | args->ioctl_return = set_palette( ( struct fb_cmap * ) args->buffer ); |
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232 | break; |
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233 | default: |
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234 | args->ioctl_return = 0; |
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235 | break; |
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236 | |
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237 | } |
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238 | return RTEMS_SUCCESSFUL; |
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239 | } |
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