1 | /* |
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2 | * Cirrus EP7312 Console Driver |
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3 | * |
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4 | * Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com> |
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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 | * |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | #include <bsp.h> /* Must be before libio.h */ |
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15 | #include <rtems/libio.h> |
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16 | #include <termios.h> |
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17 | #include <rtems/bspIo.h> |
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18 | |
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19 | #include <ep7312.h> |
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20 | #include <libchip/serial.h> |
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21 | #include <libchip/sersupp.h> |
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22 | |
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23 | #define NUM_DEVS 1 |
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24 | int uart_poll_read(int minor); |
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25 | |
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26 | static int uart_first_open(int major, int minor, void *arg); |
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27 | static int uart_last_close(int major, int minor, void *arg); |
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28 | static int uart_read(int minor); |
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29 | static int uart_write(int minor, const char *buf, int len); |
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30 | static void uart_init(int minor); |
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31 | static void uart_write_polled(int minor, char c); |
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32 | static int uart_set_attributes(int minor, const struct termios *t); |
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33 | |
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34 | unsigned long Console_Port_Count = NUM_DEVS; |
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35 | console_data Console_Port_Data[NUM_DEVS]; |
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36 | rtems_device_minor_number Console_Port_Minor = 0; |
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37 | console_fns uart_fns = |
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38 | { |
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39 | libchip_serial_default_probe, |
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40 | uart_first_open, |
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41 | uart_last_close, |
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42 | uart_read, |
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43 | uart_write, |
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44 | uart_init, |
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45 | uart_write_polled, |
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46 | uart_set_attributes, |
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47 | FALSE |
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48 | }; |
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49 | console_tbl Console_Port_Tbl[] = { |
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50 | { |
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51 | "/dev/com0", /* sDeviceName */ |
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52 | SERIAL_CUSTOM, /* deviceType */ |
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53 | &uart_fns, /* pDeviceFns */ |
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54 | NULL, /* deviceProbe */ |
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55 | NULL, /* pDeviceFlow */ |
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56 | 16, /* ulMargin */ |
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57 | 8, /* ulHysteresis */ |
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58 | NULL, /* pDeviceParams */ |
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59 | (uint32_t)EP7312_UARTCR1, /* ulCtrlPort1 */ |
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60 | (uint32_t)EP7312_SYSFLG1, /* ulCtrlPort2 */ |
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61 | (uint32_t)EP7312_UARTDR1, /* ulDataPort */ |
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62 | 0, /* getRegister */ |
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63 | 0, /* setRegister */ |
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64 | 0, /* getData */ |
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65 | 0, /* setData */ |
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66 | 0, /* ulClock */ |
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67 | 0 /* ulIntVector */ |
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68 | }}; |
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69 | |
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70 | static int uart_first_open(int major, int minor, void *arg) {return 0;} |
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71 | static int uart_last_close(int major, int minor, void *arg) {return 0;} |
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72 | static int uart_read(int minor) |
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73 | { |
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74 | return uart_poll_read(minor); |
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75 | } |
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76 | |
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77 | static void uart_write_polled(int minor, char c) |
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78 | { |
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79 | uart_write(minor, &c, 1); |
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80 | } |
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81 | |
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82 | static int uart_set_attributes(int minor, const struct termios *t) |
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83 | { |
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84 | return 0; |
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85 | } |
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86 | |
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87 | int uart_poll_read(int minor) |
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88 | { |
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89 | volatile uint32_t *data_reg; |
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90 | volatile uint32_t *ctrl_reg1; |
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91 | volatile uint32_t *ctrl_reg2; |
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92 | char c; |
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93 | int err; |
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94 | |
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95 | data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort; |
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96 | ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1; |
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97 | ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2; |
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98 | |
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99 | if ((*ctrl_reg2 & EP7312_UART_URXFE1) != 0) { |
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100 | return -1; |
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101 | } |
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102 | |
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103 | |
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104 | |
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105 | err = *data_reg; |
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106 | c = err & 0xff; |
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107 | err &= (EP7312_UART_FRMERR | EP7312_UART_PARERR | EP7312_UART_OVERR); |
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108 | |
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109 | return c; |
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110 | } |
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111 | |
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112 | static void _BSP_null_char( char c ) {uart_write_polled(0, c);} |
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113 | BSP_output_char_function_type BSP_output_char = _BSP_null_char; |
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114 | |
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115 | static int uart_write(int minor, const char *buf, int len) |
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116 | { |
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117 | volatile uint32_t *data_reg; |
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118 | volatile uint32_t *ctrl_reg1; |
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119 | volatile uint32_t *ctrl_reg2; |
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120 | int i; |
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121 | char c; |
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122 | |
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123 | data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort; |
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124 | ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1; |
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125 | ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2; |
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126 | |
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127 | for (i = 0; i < len; i++) { |
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128 | /* Wait for fifo to have room */ |
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129 | while ((*ctrl_reg2 & EP7312_UART_UTXFF1) != 0) { |
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130 | continue; |
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131 | } |
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132 | |
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133 | c = (char) buf[i]; |
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134 | *data_reg = c; |
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135 | } |
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136 | |
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137 | return 1; |
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138 | } |
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139 | |
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140 | static void uart_init(int minor) |
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141 | { |
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142 | volatile uint32_t *data_reg; |
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143 | volatile uint32_t *ctrl_reg1; |
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144 | volatile uint32_t *ctrl_reg2; |
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145 | |
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146 | data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort; |
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147 | ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1; |
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148 | ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2; |
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149 | |
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150 | /* *ctrl_reg = (BSP_UART_DATA8 | |
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151 | BSP_UART_STOP1 | |
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152 | BSP_UART_PARITY_NONE | |
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153 | EP7312_UART_FIFOEN | |
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154 | BSP_UART_BAUD_9600); |
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155 | */ |
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156 | *ctrl_reg1 = (EP7312_UART_WRDLEN8 | |
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157 | EP7312_UART_FIFOEN | |
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158 | 0x17); /* 9600 baud */ |
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159 | |
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160 | |
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161 | } |
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