1 | /* |
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2 | * Copyright (c) 2013 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Dornierstr. 4 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <info@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #include <errno.h> |
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16 | #include <assert.h> |
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17 | #include <stdlib.h> |
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18 | |
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19 | #include <rtems/framebuffer.h> |
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20 | #include <rtems/fb.h> |
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21 | #include <rtems/libio.h> |
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22 | |
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23 | #include <bsp.h> |
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24 | #include <bsp/arm-pl111-fb.h> |
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25 | #include <bsp/fatal.h> |
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26 | |
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27 | typedef struct { |
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28 | rtems_id semaphore; |
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29 | void *frame_buffer; |
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30 | } pl111_fb_context; |
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31 | |
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32 | static pl111_fb_context pl111_fb_instance; |
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33 | |
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34 | static const uint8_t pl111_bits_per_pixel[] = { 1, 2, 4, 8, 16, 24, 16, 12 }; |
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35 | |
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36 | static uint32_t pl111_fb_get_width(const pl111_fb_config *cfg) |
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37 | { |
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38 | return 16U * (PL111_LCD_TIMING0_PPL_GET(cfg->timing0) + 1U); |
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39 | } |
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40 | |
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41 | static uint32_t pl111_fb_get_height(const pl111_fb_config *cfg) |
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42 | { |
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43 | return PL111_LCD_TIMING1_LPP_GET(cfg->timing1) + 1U; |
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44 | } |
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45 | |
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46 | static uint32_t pl111_fb_get_bits_per_pixel(const pl111_fb_config *cfg) |
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47 | { |
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48 | return pl111_bits_per_pixel[PL111_LCD_CONTROL_LCD_BPP_GET(cfg->control)]; |
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49 | } |
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50 | |
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51 | static uint32_t pl111_fb_get_line_length_in_bytes(const pl111_fb_config *cfg) |
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52 | { |
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53 | uint32_t width = pl111_fb_get_width(cfg); |
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54 | uint32_t bits_per_pixel = pl111_fb_get_bits_per_pixel(cfg); |
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55 | |
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56 | return width * ((bits_per_pixel + 7U) / 8U); |
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57 | } |
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58 | |
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59 | static uint32_t pl111_fb_get_frame_buffer_size(const pl111_fb_config *cfg) |
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60 | { |
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61 | uint32_t line_length_in_bytes = pl111_fb_get_line_length_in_bytes(cfg); |
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62 | uint32_t height = pl111_fb_get_height(cfg); |
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63 | |
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64 | return height * line_length_in_bytes; |
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65 | } |
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66 | |
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67 | static void pl111_fb_power_delay(const pl111_fb_config *cfg) |
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68 | { |
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69 | rtems_interval delay = (cfg->power_delay_in_us + 1) |
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70 | / rtems_configuration_get_microseconds_per_tick(); |
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71 | rtems_status_code sc = rtems_task_wake_after(delay); |
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72 | assert(sc == RTEMS_SUCCESSFUL); |
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73 | } |
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74 | |
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75 | static rtems_status_code pl111_fb_initialize(pl111_fb_context *ctx) |
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76 | { |
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77 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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78 | const pl111_fb_config *cfg = arm_pl111_fb_get_config(); |
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79 | |
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80 | ctx->frame_buffer = calloc(1, pl111_fb_get_frame_buffer_size(cfg)); |
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81 | if (ctx->frame_buffer != NULL) { |
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82 | volatile pl111 *regs = cfg->regs; |
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83 | |
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84 | (*cfg->set_up)(cfg); |
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85 | |
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86 | regs->lcd.upbase = (uint32_t) ctx->frame_buffer; |
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87 | |
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88 | regs->lcd.timing0 = cfg->timing0; |
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89 | regs->lcd.timing1 = cfg->timing1; |
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90 | regs->lcd.timing2 = cfg->timing2; |
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91 | regs->lcd.timing3 = cfg->timing3; |
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92 | regs->lcd.control = cfg->control; |
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93 | |
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94 | (*cfg->pins_set_up)(cfg); |
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95 | |
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96 | regs->lcd.control = cfg->control |
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97 | | PL111_LCD_CONTROL_LCD_EN; |
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98 | |
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99 | pl111_fb_power_delay(cfg); |
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100 | |
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101 | regs->lcd.control = cfg->control |
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102 | | PL111_LCD_CONTROL_LCD_EN |
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103 | | PL111_LCD_CONTROL_LCD_PWR; |
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104 | } else { |
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105 | sc = RTEMS_NO_MEMORY; |
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106 | } |
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107 | |
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108 | return sc; |
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109 | } |
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110 | |
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111 | static void pl111_fb_destroy(const pl111_fb_context *ctx) |
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112 | { |
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113 | const pl111_fb_config *cfg = arm_pl111_fb_get_config(); |
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114 | volatile pl111 *regs = cfg->regs; |
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115 | |
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116 | free(ctx->frame_buffer); |
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117 | |
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118 | regs->lcd.control = cfg->control |
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119 | | PL111_LCD_CONTROL_LCD_EN; |
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120 | |
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121 | pl111_fb_power_delay(cfg); |
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122 | |
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123 | regs->lcd.control = cfg->control; |
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124 | |
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125 | (*cfg->pins_tear_down)(cfg); |
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126 | (*cfg->tear_down)(cfg); |
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127 | } |
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128 | |
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129 | static void pl111_fb_get_fix_screen_info(struct fb_fix_screeninfo *info) |
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130 | { |
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131 | const pl111_fb_config *cfg = arm_pl111_fb_get_config(); |
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132 | const pl111_fb_context *ctx = &pl111_fb_instance; |
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133 | |
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134 | memset(info, 0, sizeof(*info)); |
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135 | |
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136 | info->smem_start = ctx->frame_buffer; |
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137 | info->smem_len = pl111_fb_get_frame_buffer_size(cfg); |
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138 | info->type = FB_TYPE_PACKED_PIXELS; |
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139 | info->visual = FB_VISUAL_TRUECOLOR; |
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140 | info->line_length = pl111_fb_get_line_length_in_bytes(cfg); |
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141 | } |
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142 | |
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143 | static void pl111_fb_get_var_screen_info(struct fb_var_screeninfo *info) |
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144 | { |
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145 | const pl111_fb_config *cfg = arm_pl111_fb_get_config(); |
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146 | |
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147 | memset(info, 0, sizeof(*info)); |
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148 | |
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149 | info->xres = pl111_fb_get_width(cfg); |
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150 | info->yres = pl111_fb_get_height(cfg); |
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151 | info->bits_per_pixel = pl111_fb_get_bits_per_pixel(cfg); |
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152 | } |
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153 | |
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154 | static void pl111_fb_release(const pl111_fb_context *ctx) |
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155 | { |
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156 | rtems_status_code sc = rtems_semaphore_release(ctx->semaphore); |
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157 | if (sc != RTEMS_SUCCESSFUL) { |
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158 | bsp_fatal(BSP_ARM_PL111_FATAL_SEM_RELEASE); |
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159 | } |
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160 | } |
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161 | |
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162 | rtems_device_driver frame_buffer_initialize( |
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163 | 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 | { |
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168 | rtems_status_code sc; |
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169 | pl111_fb_context *ctx = &pl111_fb_instance; |
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170 | |
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171 | sc = rtems_io_register_name(FRAMEBUFFER_DEVICE_0_NAME, major, 0); |
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172 | if (sc != RTEMS_SUCCESSFUL) { |
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173 | bsp_fatal(BSP_ARM_PL111_FATAL_REGISTER_DEV); |
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174 | } |
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175 | |
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176 | sc = rtems_semaphore_create( |
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177 | rtems_build_name('F', 'B', ' ', ' '), |
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178 | 1, |
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179 | RTEMS_COUNTING_SEMAPHORE, |
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180 | 0, |
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181 | &ctx->semaphore |
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182 | ); |
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183 | if (sc != RTEMS_SUCCESSFUL) { |
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184 | bsp_fatal(BSP_ARM_PL111_FATAL_SEM_CREATE); |
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185 | } |
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186 | |
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187 | return sc; |
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188 | } |
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189 | |
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190 | rtems_device_driver frame_buffer_open( |
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191 | rtems_device_major_number major, |
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192 | rtems_device_minor_number minor, |
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193 | void *arg |
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194 | ) |
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195 | { |
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196 | rtems_status_code sc; |
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197 | pl111_fb_context *ctx = &pl111_fb_instance; |
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198 | |
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199 | sc = rtems_semaphore_obtain( |
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200 | ctx->semaphore, |
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201 | RTEMS_WAIT, |
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202 | RTEMS_NO_TIMEOUT |
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203 | ); |
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204 | if (sc == RTEMS_SUCCESSFUL) { |
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205 | sc = pl111_fb_initialize(ctx); |
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206 | if (sc != RTEMS_SUCCESSFUL) { |
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207 | pl111_fb_release(ctx); |
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208 | } |
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209 | } |
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210 | |
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211 | return sc; |
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212 | } |
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213 | |
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214 | rtems_device_driver frame_buffer_close( |
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215 | rtems_device_major_number major, |
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216 | rtems_device_minor_number minor, |
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217 | void *arg |
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218 | ) |
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219 | { |
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220 | const pl111_fb_context *ctx = &pl111_fb_instance; |
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221 | |
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222 | pl111_fb_destroy(ctx); |
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223 | pl111_fb_release(ctx); |
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224 | |
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225 | return RTEMS_SUCCESSFUL; |
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226 | } |
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227 | |
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228 | rtems_device_driver frame_buffer_read( |
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229 | rtems_device_major_number major, |
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230 | rtems_device_minor_number minor, |
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231 | void *arg |
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232 | ) |
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233 | { |
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234 | return RTEMS_IO_ERROR; |
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235 | } |
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236 | |
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237 | rtems_device_driver frame_buffer_write( |
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238 | rtems_device_major_number major, |
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239 | rtems_device_minor_number minor, |
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240 | void *arg |
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241 | ) |
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242 | { |
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243 | return RTEMS_IO_ERROR; |
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244 | } |
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245 | |
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246 | rtems_device_driver frame_buffer_control( |
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247 | rtems_device_major_number major, |
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248 | rtems_device_minor_number minor, |
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249 | void *arg |
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250 | ) |
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251 | { |
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252 | rtems_libio_ioctl_args_t *ioctl_arg = arg; |
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253 | int eno = 0; |
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254 | |
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255 | switch (ioctl_arg->command) { |
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256 | case FBIOGET_FSCREENINFO: |
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257 | pl111_fb_get_fix_screen_info(ioctl_arg->buffer); |
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258 | break; |
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259 | case FBIOGET_VSCREENINFO: |
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260 | pl111_fb_get_var_screen_info(ioctl_arg->buffer); |
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261 | break; |
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262 | default: |
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263 | eno = EINVAL; |
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264 | break; |
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265 | } |
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266 | |
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267 | if (eno == 0) { |
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268 | ioctl_arg->ioctl_return = 0; |
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269 | } else { |
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270 | ioctl_arg->ioctl_return = -1; |
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271 | errno = eno; |
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272 | } |
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273 | |
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274 | return RTEMS_SUCCESSFUL; |
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275 | } |
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