1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup raspberrypi_vc |
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5 | * |
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6 | * @brief video core support. |
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7 | * |
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8 | */ |
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9 | |
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10 | /* |
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11 | * Copyright (c) 2015 Yang Qiao |
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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 | * |
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16 | * http://www.rtems.org/license/LICENSE |
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17 | * |
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18 | */ |
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19 | #include <pthread.h> |
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20 | |
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21 | #include <bsp.h> |
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22 | #include <bsp/raspberrypi.h> |
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23 | #include <bsp/mailbox.h> |
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24 | #include <bsp/vc.h> |
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25 | #include <libcpu/arm-cp15.h> |
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26 | #include "vc_defines.h" |
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27 | |
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28 | #if ( RPI_L2_CACHE_ENABLE == 1 ) |
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29 | #define BCM2835_VC_MEMORY_MAPPING 0x40000000 |
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30 | #else |
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31 | #define BCM2835_VC_MEMORY_MAPPING 0xC0000000 |
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32 | #endif |
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33 | |
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34 | static inline bool bcm2835_mailbox_buffer_suceeded( |
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35 | const bcm2835_mbox_buf_hdr *hdr ) |
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36 | { |
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37 | RTEMS_COMPILER_MEMORY_BARRIER(); |
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38 | return ( hdr->buf_code == BCM2835_MBOX_BUF_CODE_REQUEST_SUCCEED ); |
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39 | } |
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40 | |
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41 | static inline int bcm2835_mailbox_send_read_buffer( void *buf ) |
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42 | { |
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43 | raspberrypi_mailbox_write( BCM2835_MBOX_CHANNEL_PROP_AVC, |
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44 | (unsigned int) buf + BCM2835_VC_MEMORY_MAPPING ); |
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45 | raspberrypi_mailbox_read( BCM2835_MBOX_CHANNEL_PROP_AVC ); |
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46 | return 0; |
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47 | } |
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48 | |
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49 | /* |
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50 | * When cache is enabled then content of buffer exchanged |
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51 | * with VideoCore has to be propagated through ARM11/Cortex-A7 |
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52 | * caches |
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53 | */ |
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54 | static inline void bcm2835_mailbox_buffer_flush_and_invalidate( |
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55 | void *buf, |
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56 | size_t size |
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57 | ) |
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58 | { |
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59 | uint32_t sctlr_val; |
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60 | |
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61 | sctlr_val = arm_cp15_get_control(); |
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62 | |
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63 | RTEMS_COMPILER_MEMORY_BARRIER(); |
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64 | arm_cp15_drain_write_buffer(); |
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65 | |
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66 | if ( sctlr_val & ( ARM_CP15_CTRL_C | ARM_CP15_CTRL_M ) ) { |
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67 | #if 0 |
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68 | /* |
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69 | These architecture independent RTEMS API functions should be |
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70 | used there but CPU_DATA_CACHE_ALIGNMENT is not defined |
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71 | for ARM architecture version used on RPi and functions |
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72 | are dummy for now and do not provide required synchronization |
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73 | */ |
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74 | rtems_cache_flush_multiple_data_lines( buf, size ); |
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75 | rtems_cache_invalidate_multiple_data_lines( buf, size ); |
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76 | #elif 0 |
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77 | /* Flush complete data cache, does not work on RPi2 for some reason */ |
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78 | arm_cp15_data_cache_clean_and_invalidate(); |
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79 | #else |
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80 | /* |
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81 | * This is temporal workaround for missing cache meanager |
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82 | * which works on RPi2 |
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83 | */ |
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84 | size += (uintptr_t)buf & ~63; |
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85 | size = (size + 63) & ~63; |
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86 | while ( size ) { |
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87 | size -= 32; |
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88 | arm_cp15_data_cache_clean_and_invalidate_line(buf); |
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89 | } |
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90 | #endif |
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91 | } |
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92 | } |
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93 | |
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94 | #define BCM2835_MBOX_VAL_LENGTH_MASK( _val_len ) \ |
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95 | ( _val_len & ( ~BCM2835_MBOX_TAG_VAL_LEN_RESPONSE ) ) |
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96 | |
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97 | int bcm2835_mailbox_get_display_size( |
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98 | bcm2835_get_display_size_entries *_entries ) |
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99 | { |
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100 | struct { |
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101 | bcm2835_mbox_buf_hdr hdr; |
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102 | bcm2835_mbox_tag_display_size get_display_size; |
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103 | uint32_t end_tag; |
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104 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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105 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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106 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_display_size, |
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107 | BCM2835_MAILBOX_TAG_GET_DISPLAY_SIZE ); |
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108 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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109 | |
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110 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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111 | return -1; |
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112 | |
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113 | _entries->width = buffer.get_display_size.body.resp.width; |
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114 | _entries->height = buffer.get_display_size.body.resp.height; |
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115 | |
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116 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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117 | return -2; |
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118 | |
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119 | return 0; |
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120 | } |
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121 | |
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122 | int bcm2835_mailbox_init_frame_buffer( |
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123 | bcm2835_init_frame_buffer_entries *_entries ) |
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124 | { |
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125 | struct { |
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126 | bcm2835_mbox_buf_hdr hdr; |
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127 | bcm2835_mbox_tag_display_size set_display_size; |
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128 | bcm2835_mbox_tag_virtual_size set_virtual_size; |
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129 | bcm2835_mbox_tag_depth set_depth; |
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130 | bcm2835_mbox_tag_pixel_order set_pixel_order; |
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131 | bcm2835_mbox_tag_alpha_mode set_alpha_mode; |
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132 | bcm2835_mbox_tag_virtual_offset set_virtual_offset; |
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133 | bcm2835_mbox_tag_overscan set_overscan; |
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134 | bcm2835_mbox_tag_allocate_buffer allocate_buffer; |
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135 | bcm2835_mbox_tag_get_pitch get_pitch; |
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136 | uint32_t end_tag; |
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137 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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138 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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139 | BCM2835_MBOX_INIT_TAG( &buffer.set_display_size, |
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140 | BCM2835_MAILBOX_TAG_SET_DISPLAY_SIZE ); |
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141 | buffer.set_display_size.body.req.width = _entries->xres; |
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142 | buffer.set_display_size.body.req.height = _entries->yres; |
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143 | BCM2835_MBOX_INIT_TAG( &buffer.set_virtual_size, |
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144 | BCM2835_MAILBOX_TAG_SET_VIRTUAL_SIZE ); |
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145 | buffer.set_virtual_size.body.req.vwidth = _entries->xvirt; |
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146 | buffer.set_virtual_size.body.req.vheight = _entries->yvirt; |
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147 | BCM2835_MBOX_INIT_TAG( &buffer.set_depth, |
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148 | BCM2835_MAILBOX_TAG_SET_DEPTH ); |
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149 | buffer.set_depth.body.req.depth = _entries->depth; |
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150 | BCM2835_MBOX_INIT_TAG( &buffer.set_pixel_order, |
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151 | BCM2835_MAILBOX_TAG_SET_PIXEL_ORDER ); |
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152 | buffer.set_pixel_order.body.req.pixel_order = _entries->pixel_order; |
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153 | BCM2835_MBOX_INIT_TAG( &buffer.set_alpha_mode, |
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154 | BCM2835_MAILBOX_TAG_SET_ALPHA_MODE ); |
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155 | buffer.set_alpha_mode.body.req.alpha_mode = _entries->alpha_mode; |
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156 | BCM2835_MBOX_INIT_TAG( &buffer.set_virtual_offset, |
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157 | BCM2835_MAILBOX_TAG_SET_VIRTUAL_OFFSET ); |
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158 | buffer.set_virtual_offset.body.req.voffset_x = _entries->voffset_x; |
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159 | buffer.set_virtual_offset.body.req.voffset_x = _entries->voffset_y; |
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160 | BCM2835_MBOX_INIT_TAG( &buffer.set_overscan, |
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161 | BCM2835_MAILBOX_TAG_SET_OVERSCAN ); |
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162 | buffer.set_overscan.body.req.overscan_top = _entries->overscan_top; |
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163 | buffer.set_overscan.body.req.overscan_bottom = _entries->overscan_bottom; |
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164 | buffer.set_overscan.body.req.overscan_left = _entries->overscan_left; |
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165 | buffer.set_overscan.body.req.overscan_right = _entries->overscan_right; |
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166 | BCM2835_MBOX_INIT_TAG( &buffer.allocate_buffer, |
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167 | BCM2835_MAILBOX_TAG_ALLOCATE_BUFFER ); |
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168 | buffer.allocate_buffer.body.req.align = 0x100; |
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169 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_pitch, |
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170 | BCM2835_MAILBOX_TAG_GET_PITCH ); |
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171 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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172 | |
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173 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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174 | return -1; |
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175 | |
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176 | _entries->xres = buffer.set_display_size.body.resp.width; |
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177 | _entries->yres = buffer.set_display_size.body.resp.height; |
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178 | _entries->xvirt = buffer.set_virtual_size.body.resp.vwidth; |
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179 | _entries->yvirt = buffer.set_virtual_size.body.resp.vheight; |
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180 | _entries->depth = buffer.set_depth.body.resp.depth; |
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181 | #if ( BSP_IS_RPI2 == 1 ) |
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182 | _entries->base = buffer.allocate_buffer.body.resp.base; |
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183 | #else |
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184 | _entries->base = buffer.allocate_buffer.body.resp.base - |
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185 | BCM2835_VC_MEMORY_MAPPING; |
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186 | #endif |
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187 | _entries->size = buffer.allocate_buffer.body.resp.size; |
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188 | _entries->pixel_order = buffer.set_pixel_order.body.resp.pixel_order; |
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189 | _entries->alpha_mode = buffer.set_alpha_mode.body.resp.alpha_mode; |
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190 | _entries->voffset_x = buffer.set_virtual_offset.body.resp.voffset_x; |
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191 | _entries->voffset_y = buffer.set_virtual_offset.body.resp.voffset_y; |
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192 | _entries->overscan_left = buffer.set_overscan.body.resp.overscan_left; |
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193 | _entries->overscan_right = buffer.set_overscan.body.resp.overscan_right; |
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194 | _entries->overscan_top = buffer.set_overscan.body.resp.overscan_top; |
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195 | _entries->overscan_bottom = buffer.set_overscan.body.resp.overscan_bottom; |
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196 | |
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197 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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198 | return -2; |
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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 | int bcm2835_mailbox_get_pitch( bcm2835_get_pitch_entries *_entries ) |
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204 | { |
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205 | struct { |
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206 | bcm2835_mbox_buf_hdr hdr; |
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207 | bcm2835_mbox_tag_get_pitch get_pitch; |
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208 | uint32_t end_tag; |
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209 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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210 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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211 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_pitch, |
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212 | BCM2835_MAILBOX_TAG_GET_PITCH ); |
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213 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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214 | |
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215 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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216 | return -1; |
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217 | |
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218 | _entries->pitch = buffer.get_pitch.body.resp.pitch; |
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219 | |
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220 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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221 | return -2; |
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222 | |
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223 | return 0; |
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224 | } |
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225 | |
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226 | int bcm2835_mailbox_get_cmdline( bcm2835_get_cmdline_entries *_entries ) |
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227 | { |
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228 | int i; |
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229 | |
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230 | struct { |
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231 | bcm2835_mbox_buf_hdr hdr; |
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232 | bcm2835_mbox_tag_get_cmd_line get_cmd_line; |
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233 | uint32_t end_tag; |
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234 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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235 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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236 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_cmd_line, |
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237 | BCM2835_MAILBOX_TAG_GET_CMD_LINE ); |
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238 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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239 | |
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240 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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241 | return -1; |
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242 | |
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243 | for ( i = 0; |
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244 | i < BCM2835_MBOX_VAL_LENGTH_MASK( buffer.get_cmd_line.tag_hdr.val_len ); |
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245 | ++i ) { |
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246 | _entries->cmdline[ i ] = buffer.get_cmd_line.body.resp.cmdline[ i ]; |
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247 | } |
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248 | |
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249 | _entries->cmdline[ i ] = '\0'; |
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250 | |
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251 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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252 | return -2; |
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253 | |
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254 | return 0; |
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255 | } |
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256 | |
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257 | int bcm2835_mailbox_set_power_state( bcm2835_set_power_state_entries *_entries ) |
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258 | { |
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259 | struct { |
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260 | bcm2835_mbox_buf_hdr hdr; |
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261 | bcm2835_mbox_tag_power_state set_power_state; |
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262 | uint32_t end_tag; |
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263 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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264 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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265 | BCM2835_MBOX_INIT_TAG( &buffer.set_power_state, |
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266 | BCM2835_MAILBOX_TAG_SET_POWER_STATE ); |
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267 | buffer.set_power_state.body.req.dev_id = _entries->dev_id; |
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268 | buffer.set_power_state.body.req.state = _entries->state; |
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269 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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270 | |
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271 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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272 | return -1; |
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273 | |
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274 | _entries->dev_id = buffer.set_power_state.body.resp.dev_id; |
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275 | _entries->state = buffer.set_power_state.body.resp.state; |
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276 | |
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277 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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278 | return -2; |
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279 | |
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280 | return 0; |
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281 | } |
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282 | |
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283 | int bcm2835_mailbox_get_arm_memory( bcm2835_get_arm_memory_entries *_entries ) |
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284 | { |
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285 | struct { |
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286 | bcm2835_mbox_buf_hdr hdr; |
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287 | bcm2835_mbox_tag_get_arm_memory get_arm_memory; |
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288 | uint32_t end_tag; |
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289 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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290 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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291 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_arm_memory, |
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292 | BCM2835_MAILBOX_TAG_GET_ARM_MEMORY ); |
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293 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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294 | |
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295 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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296 | return -1; |
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297 | |
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298 | _entries->base = buffer.get_arm_memory.body.resp.base; |
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299 | _entries->size = buffer.get_arm_memory.body.resp.size; |
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300 | |
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301 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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302 | return -2; |
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303 | |
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304 | return 0; |
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305 | } |
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306 | |
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307 | int bcm2835_mailbox_get_vc_memory( bcm2835_get_vc_memory_entries *_entries ) |
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308 | { |
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309 | struct { |
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310 | bcm2835_mbox_buf_hdr hdr; |
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311 | bcm2835_mbox_tag_get_vc_memory get_vc_memory; |
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312 | uint32_t end_tag; |
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313 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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314 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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315 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_vc_memory, |
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316 | BCM2835_MAILBOX_TAG_GET_VC_MEMORY ); |
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317 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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318 | |
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319 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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320 | return -1; |
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321 | |
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322 | _entries->base = buffer.get_vc_memory.body.resp.base; |
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323 | _entries->size = buffer.get_vc_memory.body.resp.size; |
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324 | |
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325 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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326 | return -2; |
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327 | |
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328 | return 0; |
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329 | } |
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330 | |
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331 | int bcm2835_mailbox_get_firmware_revision( |
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332 | bcm2835_mailbox_get_fw_rev_entries *_entries ) |
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333 | { |
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334 | struct { |
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335 | bcm2835_mbox_buf_hdr hdr; |
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336 | bcm2835_mbox_tag_get_fw_rev get_fw_rev; |
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337 | uint32_t end_tag; |
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338 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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339 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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340 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_fw_rev, |
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341 | BCM2835_MAILBOX_TAG_FIRMWARE_REVISION ); |
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342 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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343 | |
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344 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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345 | return -1; |
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346 | |
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347 | _entries->fw_rev = buffer.get_fw_rev.body.resp.rev; |
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348 | |
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349 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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350 | return -2; |
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351 | |
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352 | return 0; |
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353 | } |
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354 | |
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355 | int bcm2835_mailbox_get_board_model( bcm2835_get_board_spec_entries *_entries ) |
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356 | { |
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357 | struct { |
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358 | bcm2835_mbox_buf_hdr hdr; |
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359 | bcm2835_mbox_tag_get_board_spec get_board_model; |
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360 | uint32_t end_tag; |
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361 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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362 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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363 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_board_model, |
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364 | BCM2835_MAILBOX_TAG_GET_BOARD_MODEL ); |
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365 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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366 | |
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367 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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368 | return -1; |
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369 | |
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370 | _entries->spec = buffer.get_board_model.body.resp.spec; |
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371 | |
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372 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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373 | return -2; |
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374 | |
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375 | return 0; |
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376 | } |
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377 | |
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378 | int bcm2835_mailbox_get_board_revision( |
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379 | bcm2835_get_board_spec_entries *_entries ) |
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380 | { |
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381 | struct { |
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382 | bcm2835_mbox_buf_hdr hdr; |
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383 | bcm2835_mbox_tag_get_board_spec get_board_revision; |
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384 | uint32_t end_tag; |
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385 | } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE; |
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386 | BCM2835_MBOX_INIT_BUF( &buffer ); |
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387 | BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_board_revision, |
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388 | BCM2835_MAILBOX_TAG_GET_BOARD_VERSION ); |
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389 | bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer ) ); |
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390 | |
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391 | if ( bcm2835_mailbox_send_read_buffer( &buffer ) ) |
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392 | return -1; |
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393 | |
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394 | _entries->spec = buffer.get_board_revision.body.resp.spec; |
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395 | |
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396 | if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) ) |
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397 | return -2; |
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398 | |
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399 | return 0; |
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400 | } |
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