1 | /*===============================================================*\ |
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2 | | Project: RTEMS generic MPC5200 BSP | |
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3 | +-----------------------------------------------------------------+ |
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4 | | Partially based on the code references which are named below. | |
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5 | | Adaptions, modifications, enhancements and any recent parts of | |
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6 | | the code are: | |
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7 | | Copyright (c) 2005 | |
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8 | | Embedded Brains GmbH | |
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9 | | Obere Lagerstr. 30 | |
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10 | | D-82178 Puchheim | |
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11 | | Germany | |
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12 | | rtems@embedded-brains.de | |
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13 | +-----------------------------------------------------------------+ |
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14 | | The license and distribution terms for this file may be | |
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15 | | found in the file LICENSE in this distribution or at | |
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16 | | | |
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17 | | http://www.rtems.com/license/LICENSE. | |
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18 | | | |
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19 | +-----------------------------------------------------------------+ |
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20 | | this file contains functions to implement a slice timer | |
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21 | \*===============================================================*/ |
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22 | /***********************************************************************/ |
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23 | /* */ |
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24 | /* Module: slicetimer.c */ |
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25 | /* Date: 07/17/2003 */ |
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26 | /* Purpose: RTEMS MPC5x00 slicetimer driver */ |
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27 | /* */ |
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28 | /*---------------------------------------------------------------------*/ |
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29 | /* */ |
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30 | /* Description: MPC5x00 slice timer routines for cyclic short time */ |
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31 | /* trigger */ |
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32 | /* */ |
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33 | /*---------------------------------------------------------------------*/ |
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34 | /* */ |
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35 | /* Code */ |
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36 | /* References: Clock driver for PPC403 */ |
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37 | /* Module: clock.c */ |
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38 | /* Project: RTEMS 4.6.0pre1 / PPC403 BSP */ |
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39 | /* Version 1.16 */ |
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40 | /* Date: 2002/11/01 */ |
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41 | /* Author(s) / Copyright(s): */ |
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42 | /* */ |
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43 | /* Author: Jay Monkman (jmonkman@frasca.com) */ |
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44 | /* Copyright (C) 1998 by Frasca International, Inc. */ |
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45 | /* */ |
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46 | /* Derived from c/src/lib/libcpu/ppc/ppc403/clock/clock.c: */ |
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47 | /* */ |
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48 | /* Author: Andrew Bray <andy@i-cubed.co.uk> */ |
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49 | /* */ |
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50 | /* COPYRIGHT (c) 1995 by i-cubed ltd. */ |
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51 | /* */ |
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52 | /* To anyone who acknowledges that this file is provided "AS IS" */ |
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53 | /* without any express or implied warranty: */ |
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54 | /* permission to use, copy, modify, and distribute this file */ |
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55 | /* for any purpose is hereby granted without fee, provided that */ |
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56 | /* the above copyright notice and this notice appears in all */ |
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57 | /* copies, and that the name of i-cubed limited not be used in */ |
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58 | /* advertising or publicity pertaining to distribution of the */ |
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59 | /* software without specific, written prior permission. */ |
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60 | /* i-cubed limited makes no representations about the suitability */ |
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61 | /* of this software for any purpose. */ |
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62 | /* */ |
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63 | /* Derived from c/src/lib/libcpu/hppa1.1/clock/clock.c: */ |
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64 | /* */ |
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65 | /* Modifications for deriving timer clock from cpu system clock by */ |
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66 | /* Thomas Doerfler <td@imd.m.isar.de> */ |
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67 | /* for these modifications: */ |
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68 | /* COPYRIGHT (c) 1997 by IMD, Puchheim, Germany. */ |
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69 | /* */ |
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70 | /* COPYRIGHT (c) 1989-1999. */ |
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71 | /* On-Line Applications Research Corporation (OAR). */ |
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72 | /* */ |
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73 | /* The license and distribution terms for this file may be */ |
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74 | /* found in the file LICENSE in this distribution or at */ |
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75 | /* http://www.rtems.com/license/LICENSE. */ |
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76 | /* */ |
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77 | /* Modifications for PPC405GP by Dennis Ehlin */ |
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78 | /*---------------------------------------------------------------------*/ |
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79 | /* */ |
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80 | /* Partially based on the code references which are named above. */ |
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81 | /* Adaptions, modifications, enhancements and any recent parts of */ |
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82 | /* the code are under the right of */ |
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83 | /* */ |
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84 | /* IPR Engineering, Dachauer StraÃe 38, D-80335 MÃŒnchen */ |
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85 | /* Copyright(C) 2003 */ |
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86 | /* */ |
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87 | /*---------------------------------------------------------------------*/ |
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88 | /* */ |
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89 | /* IPR Engineering makes no representation or warranties with */ |
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90 | /* respect to the performance of this computer program, and */ |
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91 | /* specifically disclaims any responsibility for any damages, */ |
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92 | /* special or consequential, connected with the use of this program. */ |
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93 | /* */ |
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94 | /*---------------------------------------------------------------------*/ |
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95 | /* */ |
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96 | /* Version history: 1.0 */ |
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97 | /* */ |
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98 | /***********************************************************************/ |
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99 | |
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100 | #include <bsp.h> |
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101 | #include <rtems/bspIo.h> |
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102 | #include <bsp/irq.h> |
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103 | |
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104 | #include <rtems.h> |
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105 | #include <rtems/clockdrv.h> |
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106 | #include <rtems/libio.h> |
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107 | |
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108 | #include <bsp/irq.h> |
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109 | #include "../include/mpc5200.h" |
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110 | #include "../slicetimer/slicetimer.h" |
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111 | #include <stdio.h> |
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112 | |
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113 | uint32_t value0 = 0; |
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114 | uint32_t value1 = 0; |
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115 | |
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116 | /* |
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117 | * ISR Handlers |
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118 | */ |
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119 | void mpc5200_slt_isr(uint32_t slt_no) |
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120 | { |
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121 | uint32_t status; |
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122 | struct mpc5200_slt *slt = (struct mpc5200_slt *)(&mpc5200.slt[slt_no]); |
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123 | |
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124 | status = slt->tsr; |
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125 | |
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126 | if(status & SLT_TSR_ST) |
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127 | { |
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128 | |
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129 | slt->tsr |= SLT_TSR_ST; |
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130 | |
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131 | /*if(slt_no == SLT0) |
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132 | slt0_user_defined_handler */ |
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133 | |
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134 | /*if(slt_no == SLT1) |
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135 | slt1_user_defined_handler */ |
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136 | |
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137 | } |
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138 | |
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139 | } |
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140 | |
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141 | |
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142 | rtems_isr mpc5200_slt0_isr(rtems_irq_hdl_param unused) |
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143 | { |
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144 | |
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145 | mpc5200_slt_isr(SLT0); |
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146 | |
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147 | } |
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148 | |
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149 | |
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150 | rtems_isr mpc5200_slt1_isr(rtems_irq_hdl_param unused) |
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151 | { |
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152 | |
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153 | mpc5200_slt_isr(SLT1); |
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154 | |
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155 | } |
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156 | |
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157 | |
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158 | /* |
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159 | * Initialize MPC5x00 slt |
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160 | */ |
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161 | void mpc5200_init_slt(uint32_t slt_no) |
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162 | { |
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163 | struct mpc5200_slt *slt = (struct mpc5200_slt *)(&mpc5200.slt[slt_no]); |
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164 | |
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165 | slt->tsr = SLT_TSR_ST; |
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166 | slt->cntrl = SLT_CNTRL_RW; |
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167 | |
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168 | } |
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169 | |
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170 | |
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171 | /* |
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172 | * Set MPC5x00 slt counter |
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173 | */ |
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174 | void mpc5200_set_slt_count(uint32_t slt_no) |
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175 | { |
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176 | struct mpc5200_slt *slt = (struct mpc5200_slt *)(&mpc5200.slt[slt_no]); |
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177 | |
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178 | if(slt_no == SLT0) |
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179 | /* Calculate counter value 24 bit (must be greater than 255) => IPB_Clock=33MHz -> Int. every 7,75us - 508ms */ |
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180 | if((SLT_TSR_COUNT(SLT0_INT_FREQUENCY) > 0xFF) && (SLT_TSR_COUNT(SLT0_INT_FREQUENCY) < 0x1000000)) |
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181 | slt->tcr = SLT_TSR_COUNT(SLT0_INT_FREQUENCY); |
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182 | |
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183 | if(slt_no == SLT1) |
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184 | /* Calculate counter value 24 bit (must be greater than 255) => IPB_Clock=33MHz -> Int. every 7,75us - 508ms */ |
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185 | if((SLT_TSR_COUNT(SLT1_INT_FREQUENCY) > 0xFF) && (SLT_TSR_COUNT(SLT1_INT_FREQUENCY) < 0x1000000)) |
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186 | slt->tcr = SLT_TSR_COUNT(SLT1_INT_FREQUENCY); |
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187 | |
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188 | } |
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189 | |
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190 | |
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191 | /* |
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192 | * Enable MPC5x00 slt interrupt |
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193 | */ |
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194 | void mpc5200_enable_slt_int(uint32_t slt_no) |
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195 | { |
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196 | struct mpc5200_slt *slt = (struct mpc5200_slt *)(&mpc5200.slt[slt_no]); |
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197 | |
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198 | slt->cntrl |= SLT_CNTRL_TIMEN | SLT_CNTRL_INTEN; |
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199 | |
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200 | } |
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201 | |
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202 | |
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203 | /* |
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204 | * Disable MPC5x00 slt interrupt |
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205 | */ |
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206 | void mpc5200_disable_slt_int(uint32_t slt_no) |
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207 | { |
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208 | struct mpc5200_slt *slt = (struct mpc5200_slt *)(&mpc5200.slt[slt_no]); |
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209 | |
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210 | slt->cntrl &= ~(SLT_CNTRL_TIMEN | SLT_CNTRL_INTEN); |
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211 | |
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212 | } |
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213 | |
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214 | |
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215 | /* |
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216 | * Check MPC5x00 slt status |
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217 | */ |
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218 | uint32_t mpc5200_check_slt_status(uint32_t slt_no) |
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219 | { |
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220 | struct mpc5200_slt *slt = (struct mpc5200_slt *)(&mpc5200.slt[slt_no]); |
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221 | |
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222 | if(((slt->cntrl) & (SLT_CNTRL_TIMEN | SLT_CNTRL_INTEN)) == (SLT_CNTRL_TIMEN | SLT_CNTRL_INTEN)) |
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223 | return 1; |
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224 | else |
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225 | return 0; |
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226 | |
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227 | } |
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228 | |
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229 | /* |
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230 | * switch MPC5x00 slt on |
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231 | */ |
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232 | void sltOn(const rtems_irq_connect_data* irq) |
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233 | { |
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234 | uint32_t slt_no = 0; |
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235 | |
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236 | if((irq->name) == BSP_SIU_IRQ_SL_TIMER0) |
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237 | slt_no = 0; |
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238 | |
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239 | if((irq->name) == BSP_SIU_IRQ_SL_TIMER1) |
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240 | slt_no = 1; |
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241 | |
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242 | mpc5200_set_slt_count((uint32_t)slt_no); |
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243 | mpc5200_enable_slt_int((uint32_t)slt_no); |
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244 | |
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245 | } |
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246 | |
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247 | /* |
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248 | * switch MPC5x00 slt off |
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249 | */ |
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250 | void sltOff(const rtems_irq_connect_data* irq) |
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251 | { |
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252 | uint32_t slt_no = 0; |
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253 | |
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254 | if((irq->name) == BSP_SIU_IRQ_SL_TIMER0) |
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255 | slt_no = 0; |
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256 | |
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257 | if((irq->name) == BSP_SIU_IRQ_SL_TIMER1) |
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258 | slt_no = 1; |
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259 | |
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260 | mpc5200_disable_slt_int((uint32_t)slt_no); |
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261 | |
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262 | } |
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263 | |
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264 | /* |
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265 | * get status of MPC5x00 slt |
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266 | */ |
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267 | int sltIsOn(const rtems_irq_connect_data* irq) |
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268 | { |
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269 | uint32_t slt_no = 0; |
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270 | |
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271 | if((irq->name) == BSP_SIU_IRQ_SL_TIMER0) |
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272 | slt_no = 0; |
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273 | |
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274 | if((irq->name) == BSP_SIU_IRQ_SL_TIMER1) |
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275 | slt_no = 1; |
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276 | |
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277 | if(mpc5200_check_slt_status(slt_no)) |
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278 | return 1; |
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279 | else |
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280 | return 0; |
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281 | } |
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282 | |
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283 | /* |
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284 | * MPC5x00 slt0 irq connect data |
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285 | */ |
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286 | static rtems_irq_connect_data slt0_IrqData = |
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287 | { |
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288 | BSP_SIU_IRQ_SL_TIMER0, |
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289 | mpc5200_slt0_isr, |
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290 | (rtems_irq_hdl_param) NULL, |
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291 | (rtems_irq_enable)sltOn, |
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292 | (rtems_irq_disable)sltOff, |
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293 | (rtems_irq_is_enabled)sltIsOn |
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294 | }; |
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295 | |
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296 | /* |
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297 | * MPC5x00 slt1 irq connect data |
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298 | */ |
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299 | static rtems_irq_connect_data slt1_IrqData = |
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300 | { |
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301 | BSP_SIU_IRQ_SL_TIMER1, |
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302 | mpc5200_slt1_isr, |
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303 | (rtems_irq_hdl_param) NULL, |
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304 | (rtems_irq_enable)sltOn, |
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305 | (rtems_irq_disable)sltOff, |
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306 | (rtems_irq_is_enabled)sltIsOn |
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307 | }; |
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308 | |
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309 | /* |
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310 | * call MPC5x00 slt install routines |
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311 | */ |
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312 | void Install_slt(rtems_device_minor_number slt_no) |
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313 | { |
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314 | |
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315 | mpc5200_init_slt((uint32_t)slt_no); |
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316 | mpc5200_set_slt_count((uint32_t)slt_no); |
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317 | |
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318 | } |
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319 | |
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320 | /* |
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321 | * MPC5x00 slt device driver initialize |
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322 | */ |
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323 | rtems_device_driver slt_initialize |
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324 | ( |
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325 | rtems_device_major_number major, |
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326 | rtems_device_minor_number minor, |
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327 | void *pargp |
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328 | ) |
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329 | { |
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330 | |
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331 | /* force minor according to definitions in bsp.h */ |
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332 | if(USE_SLICETIMER_0) |
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333 | { |
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334 | |
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335 | Install_slt(0); |
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336 | |
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337 | if(!BSP_install_rtems_irq_handler(&slt0_IrqData)) |
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338 | { |
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339 | |
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340 | printk("Unable to connect PSC Irq handler\n"); |
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341 | mpc5200_fatal(MPC5200_FATAL_SLICETIMER_0_IRQ_INSTALL); |
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342 | |
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343 | } |
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344 | |
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345 | } |
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346 | |
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347 | if(USE_SLICETIMER_1) |
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348 | { |
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349 | |
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350 | Install_slt(1); |
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351 | |
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352 | if(!BSP_install_rtems_irq_handler(&slt1_IrqData)) |
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353 | { |
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354 | |
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355 | printk("Unable to connect PSC Irq handler\n"); |
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356 | mpc5200_fatal(MPC5200_FATAL_SLICETIMER_1_IRQ_INSTALL); |
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357 | |
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358 | } |
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359 | |
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360 | } |
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361 | |
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362 | return RTEMS_SUCCESSFUL; |
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363 | |
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364 | } |
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365 | |
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