1 | /* ADC / DAC (GRADCDAC) interface |
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2 | /* |
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3 | * COPYRIGHT (c) 2009. |
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4 | * Cobham Gaisler AB. |
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5 | * |
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6 | * The license and distribution terms for this file may be |
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7 | * found in the file LICENSE in this distribution or at |
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8 | * http://www.rtems.org/license/LICENSE. |
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9 | */ |
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10 | |
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11 | #ifndef __GRADCDAC_H__ |
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12 | #define __GRADCDAC_H__ |
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13 | |
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14 | #ifdef __cplusplus |
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15 | extern "C" { |
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16 | #endif |
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17 | |
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18 | struct gradcdac_regs { |
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19 | volatile unsigned int config; /* 0x00 Configuration Register */ |
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20 | volatile unsigned int status; /* 0x04 Status Register */ |
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21 | int unused0[2]; |
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22 | volatile unsigned int adc_din; /* 0x10 ADC Data Input Register */ |
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23 | volatile unsigned int dac_dout; /* 0x14 DAC Data Output Register */ |
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24 | int unused1[2]; |
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25 | volatile unsigned int adrin; /* 0x20 Address Input Register */ |
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26 | volatile unsigned int adrout; /* 0x24 Address Output Register */ |
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27 | volatile unsigned int adrdir; /* 0x28 Address Direction Register */ |
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28 | int unused2[1]; |
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29 | volatile unsigned int data_in; /* 0x30 Data Input Register */ |
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30 | volatile unsigned int data_out; /* 0x34 Data Output Register */ |
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31 | volatile unsigned int data_dir; /* 0x38 Data Direction Register */ |
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32 | }; |
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33 | |
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34 | #define GRADCDAC_CFG_DACWS 0x00f80000 |
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35 | #define GRADCDAC_CFG_WRPOL 0x00040000 |
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36 | #define GRADCDAC_CFG_DACDW 0x00030000 |
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37 | #define GRADCDAC_CFG_ADCWS 0x0000f800 |
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38 | #define GRADCDAC_CFG_RCPOL 0x00000400 |
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39 | #define GRADCDAC_CFG_CSMODE 0x00000300 |
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40 | #define GRADCDAC_CFG_CSPOL 0x00000080 |
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41 | #define GRADCDAC_CFG_RDYMODE 0x00000040 |
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42 | #define GRADCDAC_CFG_RDYPOL 0x00000020 |
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43 | #define GRADCDAC_CFG_TRIGPOL 0x00000010 |
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44 | #define GRADCDAC_CFG_TRIGMODE 0x0000000c |
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45 | #define GRADCDAC_CFG_ADCDW 0x00000003 |
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46 | |
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47 | #define GRADCDAC_CFG_DACWS_BIT 19 |
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48 | #define GRADCDAC_CFG_WRPOL_BIT 18 |
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49 | #define GRADCDAC_CFG_DACDW_BIT 16 |
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50 | #define GRADCDAC_CFG_ADCWS_BIT 11 |
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51 | #define GRADCDAC_CFG_RCPOL_BIT 10 |
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52 | #define GRADCDAC_CFG_CSMODE_BIT 8 |
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53 | #define GRADCDAC_CFG_CSPOL_BIT 7 |
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54 | #define GRADCDAC_CFG_RDYMODE_BIT 6 |
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55 | #define GRADCDAC_CFG_RDYPOL_BIT 5 |
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56 | #define GRADCDAC_CFG_TRIGPOL_BIT 4 |
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57 | #define GRADCDAC_CFG_TRIGMODE_BIT 2 |
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58 | #define GRADCDAC_CFG_ADCDW_BIT 0 |
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59 | |
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60 | #define GRADCDAC_STATUS_DACNO 0x40 |
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61 | #define GRADCDAC_STATUS_DACRDY 0x20 |
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62 | #define GRADCDAC_STATUS_DACON 0x10 |
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63 | #define GRADCDAC_STATUS_ADCTO 0x08 |
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64 | #define GRADCDAC_STATUS_ADCNO 0x04 |
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65 | #define GRADCDAC_STATUS_ADCRDY 0x02 |
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66 | #define GRADCDAC_STATUS_ADCON 0x01 |
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67 | |
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68 | #define GRADCDAC_STATUS_DACNO_BIT 6 |
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69 | #define GRADCDAC_STATUS_DACRDY_BIT 5 |
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70 | #define GRADCDAC_STATUS_DACON_BIT 4 |
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71 | #define GRADCDAC_STATUS_ADCTO_BIT 3 |
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72 | #define GRADCDAC_STATUS_ADCNO_BIT 2 |
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73 | #define GRADCDAC_STATUS_ADCRDY_BIT 1 |
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74 | #define GRADCDAC_STATUS_ADCON_BIT 0 |
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75 | |
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76 | #define GRADCDAC_IRQ_DAC 1 |
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77 | #define GRADCDAC_IRQ_ADC 0 |
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78 | |
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79 | struct gradcdac_config { |
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80 | unsigned char dac_ws; |
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81 | char wr_pol; |
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82 | unsigned char dac_dw; |
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83 | unsigned char adc_ws; |
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84 | char rc_pol; |
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85 | unsigned char cs_mode; |
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86 | char cs_pol; |
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87 | char ready_mode; |
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88 | char ready_pol; |
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89 | char trigg_pol; |
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90 | unsigned char trigg_mode; |
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91 | unsigned char adc_dw; |
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92 | }; |
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93 | |
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94 | extern void *gradcdac_open(char *devname); |
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95 | |
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96 | extern void gradcdac_set_config(void *cookie, struct gradcdac_config *cfg); |
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97 | |
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98 | extern void gradcdac_get_config(void *cookie, struct gradcdac_config *cfg); |
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99 | |
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100 | extern void gradcdac_set_cfg(void *cookie, unsigned int config); |
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101 | |
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102 | extern unsigned int gradcdac_get_cfg(void *cookie); |
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103 | |
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104 | extern unsigned int gradcdac_get_status(void *cookie); |
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105 | |
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106 | static int __inline__ gradcdac_DAC_ReqRej(unsigned int status) |
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107 | { |
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108 | return (status & GRADCDAC_STATUS_DACNO); |
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109 | } |
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110 | |
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111 | static int __inline__ gradcdac_DAC_isCompleted(unsigned int status) |
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112 | { |
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113 | return (status & GRADCDAC_STATUS_DACRDY); |
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114 | } |
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115 | |
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116 | static int __inline__ gradcdac_DAC_isOngoing(unsigned int status) |
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117 | { |
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118 | return (status & GRADCDAC_STATUS_DACON); |
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119 | } |
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120 | |
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121 | static int __inline__ gradcdac_ADC_isTimeouted(unsigned int status) |
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122 | { |
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123 | return (status & GRADCDAC_STATUS_ADCTO); |
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124 | } |
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125 | |
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126 | static int __inline__ gradcdac_ADC_ReqRej(unsigned int status) |
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127 | { |
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128 | return (status & GRADCDAC_STATUS_ADCNO); |
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129 | } |
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130 | |
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131 | static int __inline__ gradcdac_ADC_isCompleted(unsigned int status) |
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132 | { |
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133 | return (status & GRADCDAC_STATUS_ADCRDY); |
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134 | } |
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135 | |
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136 | static int __inline__ gradcdac_ADC_isOngoing(unsigned int status) |
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137 | { |
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138 | return (status & GRADCDAC_STATUS_ADCON); |
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139 | } |
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140 | |
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141 | #define GRADCDAC_ISR_BOTH 3 |
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142 | #define GRADCDAC_ISR_DAC 2 |
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143 | #define GRADCDAC_ISR_ADC 1 |
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144 | |
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145 | /* Install IRQ handler for ADC and/or DAC interrupt. |
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146 | * The installed IRQ handler(ISR) must read the status |
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147 | * register to clear the pending interrupt avoiding multiple |
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148 | * entries to the ISR caused by the same IRQ. |
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149 | * |
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150 | * \param adc 1=ADC interrupt, 2=ADC interrupt, 3=ADC and DAC interrupt |
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151 | * \param isr Interrupt service routine called when IRQ is fired |
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152 | * \param arg custom argument passed to ISR when called. |
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153 | */ |
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154 | extern int gradcdac_install_irq_handler |
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155 | (void *cookie, int adc, void (*isr)(void *cookie, void *arg), void *arg); |
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156 | |
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157 | extern void gradcdac_uninstall_irq_handler(void *cookie, int adc); |
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158 | |
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159 | /* Make the ADC circuitry initialize a analogue to digital |
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160 | * conversion. The result can be read out by gradcdac_adc_convert_try |
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161 | * or gradcdac_adc_convert. |
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162 | */ |
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163 | extern void gradcdac_adc_convert_start(void *cookie); |
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164 | |
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165 | /* Tries to read the conversion result. If the circuitry is busy |
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166 | * converting the function return a non-zero value, if the conversion |
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167 | * has successfully finished the function return zero. |
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168 | * |
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169 | * \param digital_value the resulting converted value is placed here |
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170 | * \return zero = ADC conversion complete, digital_value contain current conversion result |
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171 | * positive = ADC busy, digital_value contain previous conversion result |
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172 | * negative = Conversion request failed. |
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173 | */ |
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174 | extern int gradcdac_adc_convert_try(void *cookie, unsigned short *digital_value); |
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175 | |
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176 | /* Waits until the ADC circuity has finished a digital to analogue |
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177 | * conversion. The Waiting is implemented as a busy loop utilizing |
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178 | * 100% CPU load. |
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179 | * |
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180 | * \return zero = Conversion ok |
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181 | * negative = Conversion request failed. |
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182 | */ |
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183 | extern int gradcdac_adc_convert(void *cookie, unsigned short *digital_value); |
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184 | |
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185 | /* Try to make the DAC circuitry initialize a digital to analogue |
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186 | * conversion. If the circuitry is busy by a previous conversion |
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187 | * the function return a non-zero value, if the conversion is |
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188 | * successfully initialized the function return zero. |
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189 | */ |
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190 | extern int gradcdac_dac_convert_try(void *cookie, unsigned short digital_value); |
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191 | |
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192 | /* Initializes a digital to analogue conversion by waiting until |
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193 | * previous conversions is finished before procceding with the |
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194 | * conversion. The Waiting is implemented as a busy loop utilizing |
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195 | * 100% CPU load. |
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196 | */ |
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197 | extern void gradcdac_dac_convert(void *cookie, unsigned short digital_value); |
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198 | |
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199 | extern unsigned int gradcdac_get_adrinput(void *cookie); |
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200 | extern void gradcdac_set_adrinput(void *cookie, unsigned int input); |
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201 | |
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202 | extern unsigned int gradcdac_get_adroutput(void *cookie); |
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203 | extern void gradcdac_set_adroutput(void *cookie, unsigned int output); |
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204 | |
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205 | extern unsigned int gradcdac_get_adrdir(void *cookie); |
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206 | extern void gradcdac_set_adrdir(void *cookie, unsigned int dir); |
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207 | |
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208 | extern unsigned int gradcdac_get_datainput(void *cookie); |
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209 | extern void gradcdac_set_datainput(void *cookie, unsigned int input); |
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210 | |
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211 | extern unsigned int gradcdac_get_dataoutput(void *cookie); |
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212 | extern void gradcdac_set_dataoutput(void *cookie, unsigned int output); |
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213 | |
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214 | extern unsigned int gradcdac_get_datadir(void *cookie); |
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215 | extern void gradcdac_set_datadir(void *cookie, unsigned int dir); |
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216 | |
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217 | /* Show one or all GRADCDAC cores. If cookie is NULL all GRADCDAC's are shown */ |
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218 | extern void grAdcDacShow(void *cookie); |
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219 | |
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220 | /* Register Driver routine */ |
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221 | extern void gradcdac_register_drv (void); |
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222 | |
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223 | #ifdef __cplusplus |
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224 | } |
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225 | #endif |
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226 | |
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227 | #endif |
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