1 | /* tmu.c |
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2 | * |
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3 | * Milkymist TMU driver for RTEMS |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.com/license/LICENSE. |
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8 | * |
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9 | * $Id$ |
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10 | * |
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11 | * COPYRIGHT (c) 2010, 2011 Sebastien Bourdeauducq |
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12 | */ |
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13 | |
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14 | #define RTEMS_STATUS_CHECKS_USE_PRINTK |
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15 | |
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16 | #include <stdlib.h> |
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17 | #include <stdio.h> |
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18 | #include <errno.h> |
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19 | #include <sys/types.h> |
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20 | #include <rtems.h> |
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21 | #include <bsp.h> |
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22 | #include <bsp/irq-generic.h> |
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23 | #include <rtems/libio.h> |
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24 | #include <rtems/status-checks.h> |
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25 | #include "../include/system_conf.h" |
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26 | #include "milkymist_tmu.h" |
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27 | |
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28 | #define DEVICE_NAME "/dev/tmu" |
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29 | |
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30 | static rtems_id done_sem; |
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31 | |
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32 | static rtems_isr done_handler(rtems_vector_number n) |
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33 | { |
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34 | rtems_semaphore_release(done_sem); |
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35 | lm32_interrupt_ack(1 << MM_IRQ_TMU); |
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36 | } |
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37 | |
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38 | rtems_device_driver tmu_initialize( |
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39 | rtems_device_major_number major, |
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40 | rtems_device_minor_number minor, |
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41 | void *arg |
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42 | ) |
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43 | { |
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44 | rtems_status_code sc; |
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45 | rtems_isr_entry dummy; |
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46 | |
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47 | sc = rtems_io_register_name(DEVICE_NAME, major, 0); |
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48 | RTEMS_CHECK_SC(sc, "create TMU device"); |
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49 | |
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50 | sc = rtems_semaphore_create( |
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51 | rtems_build_name('T', 'M', 'U', ' '), |
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52 | 0, |
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53 | RTEMS_SIMPLE_BINARY_SEMAPHORE, |
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54 | 0, |
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55 | &done_sem |
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56 | ); |
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57 | RTEMS_CHECK_SC(sc, "create TMU done semaphore"); |
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58 | |
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59 | rtems_interrupt_catch(done_handler, MM_IRQ_TMU, &dummy); |
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60 | bsp_interrupt_vector_enable(MM_IRQ_TMU); |
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61 | |
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62 | return RTEMS_SUCCESSFUL; |
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63 | } |
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64 | |
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65 | static void invalidate_l2(void) |
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66 | { |
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67 | volatile char *flushbase = (char *)FMLBRG_FLUSH_BASE; |
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68 | int i, offset; |
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69 | |
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70 | offset = 0; |
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71 | for (i=0;i<FMLBRG_LINE_COUNT;i++) { |
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72 | flushbase[offset] = 0; |
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73 | offset += FMLBRG_LINE_LENGTH; |
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74 | } |
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75 | } |
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76 | |
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77 | static bool invalidate_after; |
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78 | |
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79 | static void tmu_start(struct tmu_td *td) |
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80 | { |
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81 | if (td->invalidate_before) |
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82 | invalidate_l2(); |
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83 | |
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84 | MM_WRITE(MM_TMU_HMESHLAST, td->hmeshlast); |
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85 | MM_WRITE(MM_TMU_VMESHLAST, td->vmeshlast); |
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86 | MM_WRITE(MM_TMU_BRIGHTNESS, td->brightness); |
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87 | MM_WRITE(MM_TMU_CHROMAKEY, td->chromakey); |
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88 | |
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89 | MM_WRITE(MM_TMU_VERTICESADR, (unsigned int)td->vertices); |
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90 | MM_WRITE(MM_TMU_TEXFBUF, (unsigned int)td->texfbuf); |
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91 | MM_WRITE(MM_TMU_TEXHRES, td->texhres); |
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92 | MM_WRITE(MM_TMU_TEXVRES, td->texvres); |
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93 | MM_WRITE(MM_TMU_TEXHMASK, td->texhmask); |
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94 | MM_WRITE(MM_TMU_TEXVMASK, td->texvmask); |
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95 | |
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96 | MM_WRITE(MM_TMU_DSTFBUF, (unsigned int)td->dstfbuf); |
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97 | MM_WRITE(MM_TMU_DSTHRES, td->dsthres); |
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98 | MM_WRITE(MM_TMU_DSTVRES, td->dstvres); |
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99 | MM_WRITE(MM_TMU_DSTHOFFSET, td->dsthoffset); |
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100 | MM_WRITE(MM_TMU_DSTVOFFSET, td->dstvoffset); |
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101 | MM_WRITE(MM_TMU_DSTSQUAREW, td->dstsquarew); |
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102 | MM_WRITE(MM_TMU_DSTSQUAREH, td->dstsquareh); |
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103 | |
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104 | MM_WRITE(MM_TMU_ALPHA, td->alpha); |
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105 | |
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106 | MM_WRITE(MM_TMU_CTL, td->flags|TMU_CTL_START); |
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107 | |
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108 | invalidate_after = td->invalidate_after; |
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109 | } |
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110 | |
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111 | static rtems_status_code tmu_finalize(void) |
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112 | { |
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113 | rtems_status_code sc; |
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114 | |
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115 | sc = rtems_semaphore_obtain(done_sem, RTEMS_WAIT, 100); |
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116 | if (sc != RTEMS_SUCCESSFUL) |
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117 | return sc; |
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118 | |
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119 | if (invalidate_after) { |
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120 | invalidate_l2(); |
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121 | __asm__ volatile( /* Invalidate Level-1 data cache */ |
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122 | "wcsr DCC, r0\n" |
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123 | "nop\n" |
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124 | ); |
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125 | } |
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126 | |
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127 | return RTEMS_SUCCESSFUL; |
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128 | } |
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129 | |
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130 | rtems_device_driver tmu_control( |
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131 | rtems_device_major_number major, |
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132 | rtems_device_minor_number minor, |
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133 | void *arg |
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134 | ) |
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135 | { |
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136 | rtems_libio_ioctl_args_t *args = arg; |
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137 | struct tmu_td *td = (struct tmu_td *)args->buffer; |
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138 | rtems_status_code sc; |
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139 | |
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140 | switch (args->command) { |
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141 | case TMU_EXECUTE: |
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142 | tmu_start(td); |
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143 | sc = tmu_finalize(); |
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144 | break; |
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145 | case TMU_EXECUTE_NONBLOCK: |
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146 | tmu_start(td); |
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147 | sc = RTEMS_SUCCESSFUL; |
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148 | break; |
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149 | case TMU_EXECUTE_WAIT: |
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150 | sc = tmu_finalize(); |
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151 | break; |
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152 | default: |
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153 | sc = RTEMS_UNSATISFIED; |
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154 | break; |
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155 | } |
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156 | |
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157 | if (sc == RTEMS_SUCCESSFUL) |
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158 | args->ioctl_return = 0; |
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159 | else |
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160 | args->ioctl_return = -1; |
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161 | |
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162 | return sc; |
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163 | } |
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