1 | /* |
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2 | * This file contains the MVME167 termios console package. Only asynchronous |
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3 | * I/O is supported. |
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4 | * |
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5 | * /dev/tty0 is channel 0, Serial Port 1/Console on the MVME712M. |
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6 | * /dev/tty1 is channel 1, Serial Port 2/TTY01 on the MVME712M. |
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7 | * /dev/tty2 is channel 2, Serial Port 3 on the MVME712M. |
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8 | * /dev/tty3 is channel 3, Serial Port 4 on the MVME712M. |
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9 | * |
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10 | * Normal I/O uses DMA for output, interrupts for input. /dev/console is |
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11 | * fixed to be /dev/tty01, Serial Port 2. Very limited support is provided |
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12 | * for polled I/O. Polled I/O is intended only for running the RTEMS test |
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13 | * suites. In all cases, Serial Port 1/Console is allocated to 167Bug and |
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14 | * is the dedicated debugger port. We configure GDB to use 167Bug for |
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15 | * debugging. When debugging with GDB or 167Bug, do not open /dev/tty00. |
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16 | * |
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17 | * Modern I/O chips often contain a number of I/O devices that can operate |
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18 | * almost independently of each other. Typically, in RTEMS, all devices in |
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19 | * an I/O chip are handled by a single device driver, but that need not be |
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20 | * always the case. Each device driver must supply six entry points in the |
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21 | * Device Driver Table: a device initialization function, as well as an open, |
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22 | * close, read, write and a control function. RTEMS assigns a device major |
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23 | * number to each device driver. This major device number is the index of the |
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24 | * device driver entries in the Device Driver Table, and it used to identify |
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25 | * a particular device driver. To distinguish multiple I/O sub-devices within |
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26 | * an I/O chip, RTEMS supports device minor numbers. When a I/O device is |
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27 | * initialized, the major number is supplied to the initialization function. |
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28 | * That function must register each sub-device with a separate name and minor |
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29 | * number (as well as the supplied major number). When an application opens a |
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30 | * device by name, the corresponding major and minor numbers are returned to |
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31 | * the caller to be used in subsequent I/O operations (although these details |
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32 | * are typically hidden within the library functions). |
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33 | * |
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34 | * Such a scheme recognizes that the initialization of the individual |
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35 | * sub-devices is generally not completely independent. For example, the |
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36 | * four serial ports of the CD2401 can be configured almost independently |
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37 | * from each other. One port could be configured to operate in asynchronous |
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38 | * mode with interrupt-driven I/O, while another port could be configured to |
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39 | * operate in HDLC mode with DMA I/O. However, a device reset command will |
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40 | * reset all four channels, and the width of DMA transfers and the number of |
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41 | * retries following bus errors selected applies to all four channels. |
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42 | * Consequently, when initializing one channel, one must be careful not to |
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43 | * destroy the configuration of other channels that are already configured. |
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44 | * |
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45 | * One problem with the RTEMS I/O initialization model is that no information |
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46 | * other than a device major number is passed to the initialization function. |
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47 | * Consequently, the sub-devices must be initialized with some pre-determined |
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48 | * configuration. To change the configuration of a sub-device, it is |
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49 | * necessary to either rewrite the initialization function, or to make a |
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50 | * series of rtems_io_control() calls after initialization. The first |
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51 | * approach is not very elegant. The second approach is acceptable if an |
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52 | * application is simply changing baud rates, parity or other such |
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53 | * asynchronous parameters (as supplied by the termios package). But what if |
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54 | * an application requires one channel to run in HDLC or Bisync mode and |
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55 | * another in async mode? With a single driver per I/O chip approach, the |
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56 | * device driver must support multiple protocols. This is feasible, but it |
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57 | * often means that an application that only does asynchronous I/O now links |
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58 | * in code for other unused protocols, thus wasting precious ROM space. |
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59 | * Worse, it requires that the sub-devices be initialized in some |
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60 | * configuration, and that configuration then changed through a series of |
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61 | * device driver control calls. There is no standard API in RTEMS to switch |
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62 | * a serial line to some synchronous protocol. |
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63 | * |
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64 | * A better approach is to treat each channel as a separate device, each with |
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65 | * its own device device driver. The application then supplies its own device |
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66 | * driver table with only the required protocols (drivers) on each line. The |
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67 | * problem with this approach is that the device drivers are not really |
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68 | * independent, given that the I/O sub-devices within a common chip are not |
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69 | * independent themselves. Consequently, the related device drivers must |
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70 | * share some information. In RTEMS, there is no standard location in which |
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71 | * to share information. |
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72 | * |
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73 | * This driver handles all four channels, i.e. it distinguishes the |
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74 | * sub-devices using minor device numbers. Only asynchronous I/O is |
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75 | * supported. The console is currently fixed to be channel 1 on the CD2401, |
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76 | * which corresponds to the TTY01 port (Serial Port 2) on the MVME712M |
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77 | * Transition Module. |
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78 | * |
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79 | * The CD2401 does either interrupt-driven or DMA I/O; it does not support |
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80 | * polling. In interrupt-driven or DMA I/O modes, interrupts from the CD2401 |
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81 | * are routed to the MC68040, and the processor generates an interrupt |
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82 | * acknowledge cycle directly to the CD2401 to obtain an interrupt vector. |
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83 | * The PCCchip2 supports a pseudo-polling mode in which interrupts from the |
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84 | * CD2401 are not routed to the MC68040, but can be detected by the processor |
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85 | * by reading the appropriate CD2401 registers. In this mode, interrupt |
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86 | * acknowledge cycles must be generated to the CD2401 by reading the |
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87 | * appropriate PCCchip2 registers. |
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88 | * |
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89 | * Interrupts from the four channels cannot be routed independently; either |
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90 | * all channels are used in the pseudo-polling mode, or all channels are used |
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91 | * in interrupt-driven/DMA mode. There is no advantage in using the speudo- |
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92 | * polling mode. Consenquently, this driver performs DMA input and output. |
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93 | * Output is performed directly from the termios raw output buffer, while |
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94 | * input is accumulated into a separate buffer. |
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95 | * |
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96 | * THIS MODULE IS NOT RE-ENTRANT! Simultaneous access to a device from |
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97 | * multiple tasks is likely to cause significant problems! Concurrency |
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98 | * control is implemented in the termios package. |
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99 | * |
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100 | * THE INTERRUPT LEVEL IS SET TO 1 FOR ALL CHANNELS. |
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101 | * If the CD2401 is to be used for high speed synchronous serial I/O, the |
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102 | * interrupt priority might need to be increased. |
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103 | * |
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104 | * ALL INTERRUPT HANDLERS ARE SHARED. |
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105 | * When adding extra device drivers, either rewrite the interrupt handlers |
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106 | * to demultiplex the interrupts, or install separate vectors. Common vectors |
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107 | * are currently used to catch spurious interrupts. We could already have |
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108 | * installed separate vectors for each channel and used the spurious |
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109 | * interrupt handler defined in some other BSPs, but handling spurious |
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110 | * interrupts from the CD2401 in this device driver allows us to record more |
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111 | * information on the source of the interrupts. Furthermore, we have observed |
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112 | * the occasional spurious interrupt from channel 0. We definitely do not |
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113 | * to call a debugger for those. |
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114 | * |
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115 | * All page references are to the MVME166/MVME167/MVME187 Single Board |
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116 | * Computer Programmer's Reference Guide (MVME187PG/D2) with the April |
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117 | * 1993 supplements/addenda (MVME187PG/D2A1). |
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118 | */ |
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119 | |
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120 | /* |
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121 | * Copyright (c) 1998, National Research Council of Canada |
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122 | * |
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123 | * The license and distribution terms for this file may be |
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124 | * found in the file LICENSE in this distribution or at |
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125 | * http://www.rtems.org/license/LICENSE. |
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126 | */ |
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127 | |
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128 | #define M167_INIT |
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129 | |
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130 | #include <stdarg.h> |
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131 | #include <stdio.h> |
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132 | #include <termios.h> |
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133 | |
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134 | #include <rtems/console.h> |
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135 | #include <rtems/libio.h> |
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136 | #include <rtems/termiostypes.h> |
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137 | #include <bsp.h> /* Must be before libio.h */ |
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138 | |
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139 | /* Utility functions */ |
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140 | void cd2401_udelay( unsigned long delay ); |
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141 | void cd2401_chan_cmd( uint8_t channel, uint8_t cmd, uint8_t wait ); |
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142 | uint16_t cd2401_bitrate_divisor( uint32_t clkrate, uint32_t * bitrate ); |
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143 | void cd2401_initialize( void ); |
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144 | void cd2401_interrupts_initialize( bool enable ); |
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145 | |
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146 | /* ISRs */ |
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147 | rtems_isr cd2401_modem_isr( rtems_vector_number vector ); |
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148 | rtems_isr cd2401_re_isr( rtems_vector_number vector ); |
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149 | rtems_isr cd2401_rx_isr( rtems_vector_number vector ); |
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150 | rtems_isr cd2401_tx_isr( rtems_vector_number vector ); |
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151 | |
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152 | /* Termios callbacks */ |
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153 | int cd2401_firstOpen( int major, int minor, void *arg ); |
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154 | int cd2401_lastClose( int major, int minor, void *arg ); |
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155 | int cd2401_setAttributes( int minor, const struct termios *t ); |
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156 | int cd2401_startRemoteTx( int minor ); |
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157 | int cd2401_stopRemoteTx( int minor ); |
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158 | ssize_t cd2401_write( int minor, const char *buf, size_t len ); |
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159 | int cd2401_drainOutput( int minor ); |
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160 | int _167Bug_pollRead( int minor ); |
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161 | ssize_t _167Bug_pollWrite( int minor, const char *buf, size_t len ); |
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162 | |
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163 | /* Printk function */ |
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164 | static void _BSP_output_char( char c ); |
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165 | BSP_output_char_function_type BSP_output_char = _BSP_output_char; |
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166 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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167 | |
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168 | /* '\r' character in memory. This used to live on |
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169 | * the stack but storing the '\r' character is |
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170 | * optimized away by gcc-4.3.2 (since it seems to |
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171 | * be unused [only referenced from inline assembly |
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172 | * code in _167Bug_pollWrite()]). |
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173 | * Hence we make it a global constant. |
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174 | */ |
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175 | static const char cr_char = '\r'; |
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176 | |
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177 | /* Channel info */ |
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178 | /* static */ volatile struct { |
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179 | void *tty; /* Really a struct rtems_termios_tty * */ |
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180 | int len; /* Record nb of chars being TX'ed */ |
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181 | const char *buf; /* Record where DMA is coming from */ |
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182 | uint32_t spur_cnt; /* Nb of spurious ints so far */ |
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183 | uint32_t spur_dev; /* Indo on last spurious int */ |
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184 | uint32_t buserr_addr; /* Faulting address */ |
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185 | uint32_t buserr_type; /* Reason of bus error during DMA */ |
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186 | uint8_t own_buf_A; /* If true, buffer A belongs to the driver */ |
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187 | uint8_t own_buf_B; /* If true, buffer B belongs to the driver */ |
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188 | uint8_t txEmpty; /* If true, the output FIFO should be empty */ |
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189 | } CD2401_Channel_Info[4]; |
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190 | |
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191 | /* |
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192 | * The number of channels already opened. If zero, enable the interrupts. The |
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193 | * initial value must be 0. If initialized explicitly, the variable ends up |
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194 | * in the .data section. Its value is not re-initialized on system restart. |
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195 | * Furthermore, because the variable is changed, the .data section would not |
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196 | * be ROMable. We thus leave the variable uninitialized, which causes it to |
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197 | * be allocated in the .bss section, and rely on RTEMS to zero the .bss |
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198 | * section on every startup. |
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199 | */ |
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200 | uint8_t Init_count; |
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201 | |
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202 | /* Record previous handlers */ |
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203 | rtems_isr_entry Prev_re_isr; /* Previous rx exception isr */ |
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204 | rtems_isr_entry Prev_rx_isr; /* Previous rx isr */ |
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205 | rtems_isr_entry Prev_tx_isr; /* Previous tx isr */ |
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206 | rtems_isr_entry Prev_modem_isr; /* Previous modem/timer isr */ |
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207 | |
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208 | /* Define the following symbol to trace the calls to this driver */ |
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209 | /* #define CD2401_RECORD_DEBUG_INFO */ |
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210 | #include "console-recording.h" |
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211 | |
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212 | /* |
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213 | * Utility functions. |
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214 | */ |
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215 | |
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216 | /* |
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217 | * Assumes that clock ticks 1 million times per second. |
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218 | * |
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219 | * MAXIMUM DELAY IS ABOUT 20 ms |
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220 | * |
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221 | * Input parameters: |
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222 | * delay: Number of microseconds to delay. |
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223 | * |
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224 | * Output parameters: NONE |
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225 | * |
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226 | * Return values: NONE |
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227 | */ |
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228 | void cd2401_udelay |
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229 | ( |
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230 | unsigned long delay |
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231 | ) |
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232 | { |
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233 | unsigned long i = 20000; /* In case clock is off */ |
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234 | rtems_interval start_ticks, end_ticks, current_ticks; |
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235 | |
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236 | start_ticks = rtems_clock_get_ticks_since_boot(); |
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237 | end_ticks = start_ticks + delay; |
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238 | |
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239 | do { |
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240 | current_ticks = rtems_clock_get_ticks_since_boot(); |
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241 | } while ( --i && (current_ticks <= end_ticks) ); |
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242 | |
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243 | CD2401_RECORD_DELAY_INFO(( start_ticks, end_ticks, current_ticks, i )); |
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244 | } |
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245 | |
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246 | /* |
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247 | * cd2401_chan_cmd |
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248 | * |
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249 | * Sends a CCR command to the specified channel. Waits for any unfinished |
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250 | * previous command to complete, then sends the specified command. Optionally |
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251 | * wait for the current command to finish before returning. |
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252 | * |
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253 | * Input parameters: |
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254 | * channel - CD2401 channel number |
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255 | * cmd - command byte |
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256 | * wait - if non-zero, wait for specified command to complete before |
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257 | * returning. |
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258 | * |
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259 | * Output parameters: NONE |
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260 | * |
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261 | * Return values: NONE |
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262 | */ |
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263 | void cd2401_chan_cmd( |
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264 | uint8_t channel, |
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265 | uint8_t cmd, |
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266 | uint8_t wait |
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267 | ) |
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268 | { |
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269 | if ( channel < 4 ) { |
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270 | cd2401->car = channel; /* Select channel */ |
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271 | |
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272 | while ( cd2401->ccr != 0 ); /* Wait for completion of previous command */ |
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273 | cd2401->ccr = cmd; /* Send command */ |
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274 | if ( wait ) |
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275 | while( cd2401->ccr != 0 );/* Wait for completion */ |
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276 | } |
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277 | else { |
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278 | /* This may not be the best error message */ |
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279 | rtems_fatal_error_occurred( RTEMS_INVALID_NUMBER ); |
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280 | } |
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281 | } |
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282 | |
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283 | /* |
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284 | * cd2401_bitrate_divisor |
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285 | * |
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286 | * Compute the divisor and clock source to use to obtain the desired bitrate. |
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287 | * |
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288 | * Input parameters: |
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289 | * clkrate - system clock rate (CLK input frequency) |
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290 | * bitrate - the desired bitrate |
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291 | * |
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292 | * Output parameters: |
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293 | * bitrate - The actual bitrate achievable, to the nearest bps. |
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294 | * |
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295 | * Return values: |
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296 | * Returns divisor in lower byte and clock source in upper byte for the |
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297 | * specified bitrate. |
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298 | */ |
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299 | uint16_t cd2401_bitrate_divisor( |
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300 | uint32_t clkrate, |
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301 | uint32_t * bitrate |
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302 | ) |
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303 | { |
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304 | uint32_t divisor; |
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305 | uint16_t clksource; |
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306 | |
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307 | divisor = *bitrate << 3; /* temporary; multiply by 8 for CLK/8 */ |
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308 | divisor = (clkrate + (divisor>>1)) / divisor; /* divisor for clk0 (CLK/8) */ |
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309 | |
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310 | /* Use highest speed clock source for best precision - try clk0 to clk4 */ |
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311 | for( clksource = 0; clksource < 0x0400 && divisor > 0x100; clksource += 0x0100 ) |
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312 | divisor >>= 2; |
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313 | divisor--; /* adjustment, see specs */ |
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314 | if( divisor < 1 ) |
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315 | divisor = 1; |
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316 | else if( divisor > 0xFF ) |
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317 | divisor = 0xFF; |
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318 | *bitrate = clkrate / (1 << ((clksource >> 7)+3)) / (divisor+1); |
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319 | return( clksource | divisor ); |
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320 | } |
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321 | |
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322 | /* |
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323 | * cd2401_initialize |
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324 | * |
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325 | * Initializes the CD2401 device. Individual channels on the chip are left in |
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326 | * their default reset state, and should be subsequently configured. |
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327 | * |
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328 | * Input parameters: NONE |
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329 | * |
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330 | * Output parameters: NONE |
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331 | * |
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332 | * Return values: NONE |
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333 | */ |
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334 | void cd2401_initialize( void ) |
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335 | { |
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336 | int i; |
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337 | |
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338 | for ( i = 3; i >= 0; i-- ) { |
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339 | CD2401_Channel_Info[i].tty = NULL; |
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340 | CD2401_Channel_Info[i].len = 0; |
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341 | CD2401_Channel_Info[i].buf = NULL; |
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342 | CD2401_Channel_Info[i].spur_cnt = 0; |
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343 | CD2401_Channel_Info[i].spur_dev = 0; |
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344 | CD2401_Channel_Info[i].buserr_type = 0; |
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345 | CD2401_Channel_Info[i].buserr_addr = 0; |
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346 | CD2401_Channel_Info[i].own_buf_A = TRUE; |
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347 | CD2401_Channel_Info[i].own_buf_B = TRUE; |
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348 | CD2401_Channel_Info[i].txEmpty = TRUE; |
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349 | } |
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350 | |
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351 | /* |
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352 | * Normally, do a device reset here. If we do it, we will most likely clober |
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353 | * the port settings for 167Bug on channel 0. So we just shut up all the |
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354 | * ports by disabling their interrupts. |
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355 | */ |
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356 | #if 0 |
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357 | cd2401->gfrcr = 0; /* So we can detect that device init is done */ |
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358 | cd2401_chan_cmd( 0x10, 0); /* Reset all */ |
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359 | while(cd2401->gfrcr == 0); /* Wait for reset all */ |
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360 | #endif |
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361 | |
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362 | /* |
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363 | * The CL-CD2400/2401 manual (part no 542400-003) states on page 87 that |
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364 | * the LICR "contains the number of the interrupting channel being served. |
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365 | * The channel number is always that of the current acknowledged interrupt." |
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366 | * THE USER MUST PROGRAM CHANNEL NUMBER IN LICR! It is not set automatically |
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367 | * by the hardware, as suggested by the manual. |
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368 | * |
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369 | * The updated manual (part no 542400-007) has the story straight. The |
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370 | * CD2401 automatically initializes the LICR to contain the channel number |
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371 | * in bits 2 and 3. However, these bits are not preserved when the user |
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372 | * defined bits are written. |
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373 | * |
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374 | * The same vector number is used for all four channels. Different vector |
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375 | * numbers could be programmed for each channel, thus avoiding the need to |
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376 | * demultiplex the interrupts in the ISR. |
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377 | */ |
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378 | for ( i = 0; i < 4; i++ ) { |
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379 | cd2401->car = i; /* Select channel */ |
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380 | cd2401->livr = 0x5C; /* Motorola suggested value p. 3-15 */ |
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381 | cd2401->licr = i << 2; /* Don't rely on reset value */ |
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382 | cd2401->ier = 0; /* Disable all interrupts */ |
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383 | } |
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384 | |
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385 | /* |
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386 | * The content of the CD2401 xpilr registers must match the A7-A0 addresses |
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387 | * generated by the PCCchip2 during interrupt acknowledge cycles in order |
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388 | * for the CD2401 to recognize the IACK cycle and clear its interrupt |
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389 | * request. |
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390 | */ |
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391 | cd2401->mpilr = 0x01; /* Match pccchip2->modem_piack p. 3-27 */ |
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392 | cd2401->tpilr = 0x02; /* Match pccchip2->tx_piack p. 3-28 */ |
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393 | cd2401->rpilr = 0x03; /* Match pccchip2->rx_piack p. 3-29 */ |
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394 | |
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395 | /* Global CD2401 registers */ |
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396 | cd2401->dmr = 0; /* 16-bit DMA transfers when possible */ |
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397 | cd2401->bercnt = 0; /* Do not retry DMA upon bus errors */ |
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398 | |
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399 | /* |
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400 | * Setup timer prescaler period, which clocks timers 1 and 2 (or rx timeout |
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401 | * and tx delay). The prescaler is clocked by the system clock) / 2048. The |
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402 | * register must be in the range 0x0A..0xFF, ie. a rescaler period range of |
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403 | * about 1ms..26ms for a nominal system clock rate of 20MHz. |
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404 | */ |
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405 | cd2401->tpr = 0x0A; /* Same value as 167Bug */ |
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406 | } |
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407 | |
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408 | /* |
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409 | * cd2401_interrupts_initialize |
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410 | * |
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411 | * This routine enables or disables the CD2401 interrupts to the MC68040. |
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412 | * Interrupts cannot be enabled/disabled on a per-channel basis. |
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413 | * |
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414 | * Input parameters: |
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415 | * enable - if true, enable the interrupts, else disable them. |
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416 | * |
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417 | * Output parameters: NONE |
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418 | * |
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419 | * Return values: NONE |
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420 | * |
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421 | * THE FIRST CD2401 CHANNEL OPENED SHOULD ENABLE INTERRUPTS. |
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422 | * THE LAST CD2401 CHANNEL CLOSED SHOULD DISABLE INTERRUPTS. |
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423 | */ |
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424 | void cd2401_interrupts_initialize( |
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425 | bool enable |
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426 | ) |
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427 | { |
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428 | if ( enable ) { |
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429 | /* |
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430 | * Enable interrupts from the CD2401 in the PCCchip2. |
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431 | * During DMA transfers, the MC68040 supplies dirty data during read cycles |
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432 | * from the CD2401 and leaves the data dirty in its data cache if there is |
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433 | * a cache hit. The MC68040 updates the data cache during write cycles from |
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434 | * the CD2401 if there is a cache hit. |
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435 | */ |
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436 | pccchip2->SCC_error = 0x01; |
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437 | pccchip2->SCC_modem_int_ctl = 0x10 | CD2401_INT_LEVEL; |
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438 | pccchip2->SCC_tx_int_ctl = 0x10 | CD2401_INT_LEVEL; |
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439 | pccchip2->SCC_rx_int_ctl = 0x50 | CD2401_INT_LEVEL; |
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440 | |
---|
441 | pccchip2->gen_control |= 0x02; /* Enable pccchip2 interrupts */ |
---|
442 | } |
---|
443 | else { |
---|
444 | /* Disable interrupts */ |
---|
445 | pccchip2->SCC_modem_int_ctl &= 0xEF; |
---|
446 | pccchip2->SCC_tx_int_ctl &= 0xEF; |
---|
447 | pccchip2->SCC_rx_int_ctl &= 0xEF; |
---|
448 | } |
---|
449 | } |
---|
450 | |
---|
451 | /* ISRs */ |
---|
452 | |
---|
453 | /* |
---|
454 | * cd2401_modem_isr |
---|
455 | * |
---|
456 | * Modem/timer interrupt (group 1) from CD2401. These are not used, and not |
---|
457 | * expected. Record as spurious and clear. |
---|
458 | * |
---|
459 | * Input parameters: |
---|
460 | * vector - vector number |
---|
461 | * |
---|
462 | * Output parameters: NONE |
---|
463 | * |
---|
464 | * Return values: NONE |
---|
465 | */ |
---|
466 | rtems_isr cd2401_modem_isr( |
---|
467 | rtems_vector_number vector |
---|
468 | ) |
---|
469 | { |
---|
470 | uint8_t ch; |
---|
471 | |
---|
472 | /* Get interrupting channel ID */ |
---|
473 | ch = cd2401->licr >> 2; |
---|
474 | |
---|
475 | /* Record interrupt info for debugging */ |
---|
476 | CD2401_Channel_Info[ch].spur_dev = |
---|
477 | (vector << 24) | (cd2401->stk << 16) | (cd2401->mir << 8) | cd2401->misr; |
---|
478 | CD2401_Channel_Info[ch].spur_cnt++; |
---|
479 | |
---|
480 | cd2401->meoir = 0; /* EOI */ |
---|
481 | CD2401_RECORD_MODEM_ISR_SPURIOUS_INFO(( ch, |
---|
482 | CD2401_Channel_Info[ch].spur_dev, |
---|
483 | CD2401_Channel_Info[ch].spur_cnt )); |
---|
484 | } |
---|
485 | |
---|
486 | /* |
---|
487 | * cd2401_re_isr |
---|
488 | * |
---|
489 | * RX exception interrupt (group 3, receiver exception) from CD2401. These are |
---|
490 | * not used, and not expected. Record as spurious and clear. |
---|
491 | * |
---|
492 | * FIX THIS ISR TO DETECT BREAK CONDITIONS AND RAISE SIGINT |
---|
493 | * |
---|
494 | * Input parameters: |
---|
495 | * vector - vector number |
---|
496 | * |
---|
497 | * Output parameters: NONE |
---|
498 | * |
---|
499 | * Return values: NONE |
---|
500 | */ |
---|
501 | rtems_isr cd2401_re_isr( |
---|
502 | rtems_vector_number vector |
---|
503 | ) |
---|
504 | { |
---|
505 | uint8_t ch; |
---|
506 | |
---|
507 | /* Get interrupting channel ID */ |
---|
508 | ch = cd2401->licr >> 2; |
---|
509 | |
---|
510 | /* Record interrupt info for debugging */ |
---|
511 | CD2401_Channel_Info[ch].spur_dev = |
---|
512 | (vector << 24) | (cd2401->stk << 16) | (cd2401->rir << 8) | cd2401->u5.b.risrl; |
---|
513 | CD2401_Channel_Info[ch].spur_cnt++; |
---|
514 | |
---|
515 | if ( cd2401->u5.b.risrl & 0x80 ) /* Timeout interrupt? */ |
---|
516 | cd2401->ier &= 0xDF; /* Disable rx timeout interrupt */ |
---|
517 | cd2401->reoir = 0x08; /* EOI; exception char not read */ |
---|
518 | CD2401_RECORD_RE_ISR_SPURIOUS_INFO(( ch, |
---|
519 | CD2401_Channel_Info[ch].spur_dev, |
---|
520 | CD2401_Channel_Info[ch].spur_cnt )); |
---|
521 | } |
---|
522 | |
---|
523 | /* |
---|
524 | * cd2401_rx_isr |
---|
525 | * |
---|
526 | * RX interrupt (group 3, receiver data) from CD2401. |
---|
527 | * |
---|
528 | * Input parameters: |
---|
529 | * vector - vector number |
---|
530 | * |
---|
531 | * Output parameters: NONE |
---|
532 | * |
---|
533 | * Return values: NONE |
---|
534 | */ |
---|
535 | rtems_isr cd2401_rx_isr( |
---|
536 | rtems_vector_number vector |
---|
537 | ) |
---|
538 | { |
---|
539 | char c; |
---|
540 | uint8_t ch, status, nchars, total; |
---|
541 | #ifdef CD2401_RECORD_DEBUG_INFO |
---|
542 | uint8_t i = 0; |
---|
543 | char buffer[256]; |
---|
544 | #endif |
---|
545 | |
---|
546 | (void) total; /* avoid set but not used warnings when not recording info */ |
---|
547 | |
---|
548 | status = cd2401->u5.b.risrl; |
---|
549 | ch = cd2401->licr >> 2; |
---|
550 | |
---|
551 | /* Has this channel been initialized or is it a condition we ignore? */ |
---|
552 | if ( CD2401_Channel_Info[ch].tty && !status ) { |
---|
553 | /* Normal Rx Int, read chars, enqueue them, and issue EOI */ |
---|
554 | total = nchars = cd2401->rfoc; /* Nb of chars to retrieve from rx FIFO */ |
---|
555 | while ( nchars-- > 0 ) { |
---|
556 | c = (char)cd2401->dr; /* Next char in rx FIFO */ |
---|
557 | rtems_termios_enqueue_raw_characters( CD2401_Channel_Info[ch].tty ,&c, 1 ); |
---|
558 | #ifdef CD2401_RECORD_DEBUG_INFO |
---|
559 | buffer[i++] = c; |
---|
560 | #endif |
---|
561 | } |
---|
562 | cd2401->reoir = 0; /* EOI */ |
---|
563 | CD2401_RECORD_RX_ISR_INFO(( ch, total, buffer )); |
---|
564 | } else { |
---|
565 | /* No, record as spurious interrupt */ |
---|
566 | CD2401_Channel_Info[ch].spur_dev = |
---|
567 | (vector << 24) | (cd2401->stk << 16) | (cd2401->rir << 8) | cd2401->u5.b.risrl; |
---|
568 | CD2401_Channel_Info[ch].spur_cnt++; |
---|
569 | cd2401->reoir = 0x04; /* EOI - character not read */ |
---|
570 | CD2401_RECORD_RX_ISR_SPURIOUS_INFO(( ch, status, |
---|
571 | CD2401_Channel_Info[ch].spur_dev, |
---|
572 | CD2401_Channel_Info[ch].spur_cnt )); |
---|
573 | } |
---|
574 | } |
---|
575 | |
---|
576 | /* |
---|
577 | * cd2401_tx_isr |
---|
578 | * |
---|
579 | * TX interrupt (group 2) from CD2401. |
---|
580 | * |
---|
581 | * Input parameters: |
---|
582 | * vector - vector number |
---|
583 | * |
---|
584 | * Output parameters: NONE |
---|
585 | * |
---|
586 | * Return values: NONE |
---|
587 | */ |
---|
588 | rtems_isr cd2401_tx_isr( |
---|
589 | rtems_vector_number vector |
---|
590 | ) |
---|
591 | { |
---|
592 | uint8_t ch, status, buserr, initial_ier, final_ier; |
---|
593 | |
---|
594 | status = cd2401->tisr; |
---|
595 | ch = cd2401->licr >> 2; |
---|
596 | initial_ier = cd2401->ier; |
---|
597 | |
---|
598 | #ifndef CD2401_RECORD_DEBUG_INFO |
---|
599 | /* |
---|
600 | * When the debug is disabled, these variables are really not read. |
---|
601 | * But when debug is enabled, they are. |
---|
602 | */ |
---|
603 | (void) initial_ier; /* avoid set but not used warning */ |
---|
604 | (void) final_ier; /* avoid set but not used warning */ |
---|
605 | #endif |
---|
606 | |
---|
607 | /* Has this channel been initialized? */ |
---|
608 | if ( !CD2401_Channel_Info[ch].tty ) { |
---|
609 | /* No, record as spurious interrupt */ |
---|
610 | CD2401_Channel_Info[ch].spur_dev = |
---|
611 | (vector << 24) | (cd2401->stk << 16) | (cd2401->tir << 8) | cd2401->tisr; |
---|
612 | CD2401_Channel_Info[ch].spur_cnt++; |
---|
613 | final_ier = cd2401->ier &= 0xFC;/* Shut up, whoever you are */ |
---|
614 | |
---|
615 | cd2401->teoir = 0x88; /* EOI - Terminate buffer and no transfer */ |
---|
616 | CD2401_RECORD_TX_ISR_SPURIOUS_INFO(( ch, status, initial_ier, final_ier, |
---|
617 | CD2401_Channel_Info[ch].spur_dev, |
---|
618 | CD2401_Channel_Info[ch].spur_cnt )); |
---|
619 | return; |
---|
620 | } |
---|
621 | |
---|
622 | if ( status & 0x80 ) { |
---|
623 | /* |
---|
624 | * Bus error occurred during DMA transfer. For now, just record. |
---|
625 | * Get reason for DMA bus error and clear the report for the next |
---|
626 | * occurrence |
---|
627 | */ |
---|
628 | buserr = pccchip2->SCC_error; |
---|
629 | pccchip2->SCC_error = 0x01; |
---|
630 | CD2401_Channel_Info[ch].buserr_type = |
---|
631 | (vector << 24) | (buserr << 16) | (cd2401->tir << 8) | cd2401->tisr; |
---|
632 | CD2401_Channel_Info[ch].buserr_addr = |
---|
633 | (((uint32_t)cd2401->tcbadru) << 16) | cd2401->tcbadrl; |
---|
634 | |
---|
635 | cd2401->teoir = 0x80; /* EOI - terminate bad buffer */ |
---|
636 | CD2401_RECORD_TX_ISR_BUSERR_INFO(( ch, status, initial_ier, buserr, |
---|
637 | CD2401_Channel_Info[ch].buserr_type, |
---|
638 | CD2401_Channel_Info[ch].buserr_addr )); |
---|
639 | return; |
---|
640 | } |
---|
641 | |
---|
642 | if ( status & 0x20 ) { |
---|
643 | /* DMA done -- Turn off TxD int, turn on TxMpty */ |
---|
644 | final_ier = cd2401->ier = (cd2401->ier & 0xFE) | 0x02; |
---|
645 | if( status & 0x08 ) { |
---|
646 | /* Transmit buffer B was released */ |
---|
647 | CD2401_Channel_Info[ch].own_buf_B = TRUE; |
---|
648 | } |
---|
649 | else { |
---|
650 | /* Transmit buffer A was released */ |
---|
651 | CD2401_Channel_Info[ch].own_buf_A = TRUE; |
---|
652 | } |
---|
653 | CD2401_RECORD_TX_ISR_INFO(( ch, status, initial_ier, final_ier, |
---|
654 | CD2401_Channel_Info[ch].txEmpty )); |
---|
655 | |
---|
656 | /* This call can result in a call to cd2401_write() */ |
---|
657 | rtems_termios_dequeue_characters ( |
---|
658 | CD2401_Channel_Info[ch].tty, |
---|
659 | CD2401_Channel_Info[ch].len ); |
---|
660 | cd2401->teoir = 0x08; /* EOI - no data transfered */ |
---|
661 | } |
---|
662 | else if ( status & 0x02 ) { |
---|
663 | /* TxEmpty */ |
---|
664 | CD2401_Channel_Info[ch].txEmpty = TRUE; |
---|
665 | final_ier = cd2401->ier &= 0xFD;/* Shut up the interrupts */ |
---|
666 | cd2401->teoir = 0x08; /* EOI - no data transfered */ |
---|
667 | CD2401_RECORD_TX_ISR_INFO(( ch, status, initial_ier, final_ier, |
---|
668 | CD2401_Channel_Info[ch].txEmpty )); |
---|
669 | } |
---|
670 | else { |
---|
671 | /* Why did we get a Tx interrupt? */ |
---|
672 | CD2401_Channel_Info[ch].spur_dev = |
---|
673 | (vector << 24) | (cd2401->stk << 16) | (cd2401->tir << 8) | cd2401->tisr; |
---|
674 | CD2401_Channel_Info[ch].spur_cnt++; |
---|
675 | cd2401->teoir = 0x08; /* EOI - no data transfered */ |
---|
676 | CD2401_RECORD_TX_ISR_SPURIOUS_INFO(( ch, status, initial_ier, 0xFF, |
---|
677 | CD2401_Channel_Info[ch].spur_dev, |
---|
678 | CD2401_Channel_Info[ch].spur_cnt )); |
---|
679 | } |
---|
680 | } |
---|
681 | |
---|
682 | /* |
---|
683 | * termios callbacks |
---|
684 | */ |
---|
685 | |
---|
686 | /* |
---|
687 | * cd2401_firstOpen |
---|
688 | * |
---|
689 | * This is the first time that this minor device (channel) is opened. |
---|
690 | * Complete the asynchronous initialization. |
---|
691 | * |
---|
692 | * Input parameters: |
---|
693 | * major - device major number |
---|
694 | * minor - channel number |
---|
695 | * arg - pointer to a struct rtems_libio_open_close_args_t |
---|
696 | * |
---|
697 | * Output parameters: NONE |
---|
698 | * |
---|
699 | * Return value: IGNORED |
---|
700 | */ |
---|
701 | int cd2401_firstOpen( |
---|
702 | int major, |
---|
703 | int minor, |
---|
704 | void *arg |
---|
705 | ) |
---|
706 | { |
---|
707 | rtems_libio_open_close_args_t *args = arg; |
---|
708 | rtems_libio_ioctl_args_t newarg; |
---|
709 | struct termios termios; |
---|
710 | rtems_status_code sc; |
---|
711 | rtems_interrupt_level level; |
---|
712 | |
---|
713 | rtems_interrupt_disable (level); |
---|
714 | |
---|
715 | /* |
---|
716 | * Set up the line with the specified parameters. The difficulty is that |
---|
717 | * the line parameters are stored in the struct termios field of a |
---|
718 | * struct rtems_termios_tty that is not defined in a public header file. |
---|
719 | * Therefore, we do not have direct access to the termios passed in with |
---|
720 | * arg. So we make a rtems_termios_ioctl() call to get a pointer to the |
---|
721 | * termios structure. |
---|
722 | * |
---|
723 | * THIS KLUDGE MAY BREAK IN THE FUTURE! |
---|
724 | * |
---|
725 | * We could have made a tcgetattr() call if we had our fd. |
---|
726 | */ |
---|
727 | newarg.iop = args->iop; |
---|
728 | newarg.command = TIOCGETA; |
---|
729 | newarg.buffer = &termios; |
---|
730 | sc = rtems_termios_ioctl (&newarg); |
---|
731 | if (sc != RTEMS_SUCCESSFUL) |
---|
732 | rtems_fatal_error_occurred (sc); |
---|
733 | |
---|
734 | /* |
---|
735 | * Turn off hardware flow control. It is a pain with 3-wire cables. |
---|
736 | * The rtems_termios_ioctl() call below results in a call to |
---|
737 | * cd2401_setAttributes to initialize the line. The caller will "wait" |
---|
738 | * on the ttyMutex that it already owns; this is safe in RTEMS. |
---|
739 | */ |
---|
740 | termios.c_cflag |= CLOCAL; /* Ignore modem status lines */ |
---|
741 | newarg.command = TIOCGETA; |
---|
742 | sc = rtems_termios_ioctl (&newarg); |
---|
743 | if (sc != RTEMS_SUCCESSFUL) |
---|
744 | rtems_fatal_error_occurred (sc); |
---|
745 | |
---|
746 | /* Mark that the channel as initialized */ |
---|
747 | CD2401_Channel_Info[minor].tty = args->iop->data1; |
---|
748 | |
---|
749 | /* If the first of the four channels to open, set up the interrupts */ |
---|
750 | if ( !Init_count++ ) { |
---|
751 | /* Install the interrupt handlers */ |
---|
752 | Prev_re_isr = (rtems_isr_entry) set_vector( cd2401_re_isr, 0x5C, 1 ); |
---|
753 | Prev_modem_isr = (rtems_isr_entry) set_vector( cd2401_modem_isr, 0x5D, 1 ); |
---|
754 | Prev_tx_isr = (rtems_isr_entry) set_vector( cd2401_tx_isr, 0x5E, 1 ); |
---|
755 | Prev_rx_isr = (rtems_isr_entry) set_vector( cd2401_rx_isr, 0x5F, 1 ); |
---|
756 | |
---|
757 | cd2401_interrupts_initialize( TRUE ); |
---|
758 | } |
---|
759 | |
---|
760 | CD2401_RECORD_FIRST_OPEN_INFO(( minor, Init_count )); |
---|
761 | |
---|
762 | rtems_interrupt_enable (level); |
---|
763 | |
---|
764 | /* Return something */ |
---|
765 | return RTEMS_SUCCESSFUL; |
---|
766 | } |
---|
767 | |
---|
768 | /* |
---|
769 | * cd2401_lastClose |
---|
770 | * |
---|
771 | * There are no more opened file descriptors to this device. Close it down. |
---|
772 | * |
---|
773 | * Input parameters: |
---|
774 | * major - device major number |
---|
775 | * minor - channel number |
---|
776 | * arg - pointer to a struct rtems_libio_open_close_args_t |
---|
777 | */ |
---|
778 | int cd2401_lastClose( |
---|
779 | int major, |
---|
780 | int minor, |
---|
781 | void *arg |
---|
782 | ) |
---|
783 | { |
---|
784 | rtems_interrupt_level level; |
---|
785 | |
---|
786 | rtems_interrupt_disable (level); |
---|
787 | |
---|
788 | /* Mark that the channel is no longer is use */ |
---|
789 | CD2401_Channel_Info[minor].tty = NULL; |
---|
790 | |
---|
791 | /* If the last of the four channels to close, disable the interrupts */ |
---|
792 | if ( !--Init_count ) { |
---|
793 | cd2401_interrupts_initialize( FALSE ); |
---|
794 | |
---|
795 | /* De-install the interrupt handlers */ |
---|
796 | set_vector( Prev_re_isr, 0x5C, 1 ); |
---|
797 | set_vector( Prev_modem_isr, 0x5D, 1 ); |
---|
798 | set_vector( Prev_tx_isr, 0x5E, 1 ); |
---|
799 | set_vector( Prev_rx_isr, 0x5F, 1 ); |
---|
800 | } |
---|
801 | |
---|
802 | CD2401_RECORD_LAST_CLOSE_INFO(( minor, Init_count )); |
---|
803 | |
---|
804 | rtems_interrupt_enable (level); |
---|
805 | |
---|
806 | /* return something */ |
---|
807 | return RTEMS_SUCCESSFUL; |
---|
808 | } |
---|
809 | |
---|
810 | /* |
---|
811 | * cd2401_setAttributes |
---|
812 | * |
---|
813 | * Set up the selected channel of the CD2401 chip for doing asynchronous |
---|
814 | * I/O with DMA. |
---|
815 | * |
---|
816 | * The chip must already have been initialized by cd2401_initialize(). |
---|
817 | * |
---|
818 | * This code was written for clarity. The code space it occupies could be |
---|
819 | * reduced. The code could also be compiled with aggressive optimization |
---|
820 | * turned on. |
---|
821 | * |
---|
822 | * Input parameters: |
---|
823 | * minor - the selected channel |
---|
824 | * t - the termios parameters |
---|
825 | * |
---|
826 | * Output parameters: NONE |
---|
827 | * |
---|
828 | * Return value: IGNORED |
---|
829 | */ |
---|
830 | int cd2401_setAttributes( |
---|
831 | int minor, |
---|
832 | const struct termios *t |
---|
833 | ) |
---|
834 | { |
---|
835 | uint8_t csize, cstopb, parodd, parenb, ignpar, inpck; |
---|
836 | uint8_t hw_flow_ctl, sw_flow_ctl, extra_flow_ctl; |
---|
837 | uint8_t icrnl, igncr, inlcr, brkint, ignbrk, parmrk, istrip; |
---|
838 | uint8_t need_reinitialization = FALSE; |
---|
839 | uint8_t read_enabled; |
---|
840 | uint16_t tx_period, rx_period; |
---|
841 | uint32_t out_baud, in_baud; |
---|
842 | rtems_interrupt_level level; |
---|
843 | |
---|
844 | /* Determine what the line parameters should be */ |
---|
845 | |
---|
846 | /* baud rates */ |
---|
847 | out_baud = rtems_termios_baud_to_number(t->c_ospeed); |
---|
848 | in_baud = rtems_termios_baud_to_number(t->c_ispeed); |
---|
849 | |
---|
850 | /* Number of bits per char */ |
---|
851 | csize = 0x07; /* to avoid a warning */ |
---|
852 | switch ( t->c_cflag & CSIZE ) { |
---|
853 | case CS5: csize = 0x04; break; |
---|
854 | case CS6: csize = 0x05; break; |
---|
855 | case CS7: csize = 0x06; break; |
---|
856 | case CS8: csize = 0x07; break; |
---|
857 | } |
---|
858 | |
---|
859 | /* Parity */ |
---|
860 | if ( t->c_cflag & PARODD ) |
---|
861 | parodd = 0x80; /* Odd parity */ |
---|
862 | else |
---|
863 | parodd = 0; |
---|
864 | |
---|
865 | if ( t->c_cflag & PARENB ) |
---|
866 | parenb = 0x40; /* Parity enabled on Tx and Rx */ |
---|
867 | else |
---|
868 | parenb = 0x00; /* No parity on Tx and Rx */ |
---|
869 | |
---|
870 | /* CD2401 IGNPAR and INPCK bits are inverted wrt POSIX standard? */ |
---|
871 | if ( t->c_iflag & INPCK ) |
---|
872 | ignpar = 0; /* Check parity on input */ |
---|
873 | else |
---|
874 | ignpar = 0x10; /* Do not check parity on input */ |
---|
875 | if ( t->c_iflag & IGNPAR ) { |
---|
876 | inpck = 0x03; /* Discard error character */ |
---|
877 | parmrk = 0; |
---|
878 | } else { |
---|
879 | if ( t->c_iflag & PARMRK ) { |
---|
880 | inpck = 0x01; /* Translate to 0xFF 0x00 <char> */ |
---|
881 | parmrk = 0x04; |
---|
882 | } else { |
---|
883 | inpck = 0x01; /* Translate to 0x00 */ |
---|
884 | parmrk = 0; |
---|
885 | } |
---|
886 | } |
---|
887 | |
---|
888 | /* Stop bits */ |
---|
889 | if ( t->c_cflag & CSTOPB ) |
---|
890 | cstopb = 0x04; /* Two stop bits */ |
---|
891 | else |
---|
892 | cstopb = 0x02; /* One stop bit */ |
---|
893 | |
---|
894 | /* Modem flow control */ |
---|
895 | if ( t->c_cflag & CLOCAL ) |
---|
896 | hw_flow_ctl = 0x04; /* Always assert RTS before Tx */ |
---|
897 | else |
---|
898 | hw_flow_ctl = 0x07; /* Always assert RTS before Tx, |
---|
899 | wait for CTS and DSR */ |
---|
900 | |
---|
901 | /* XON/XOFF Tx flow control */ |
---|
902 | if ( t->c_iflag & IXON ) { |
---|
903 | sw_flow_ctl = 0x40; /* Tx in-band flow ctl enabled, wait for XON */ |
---|
904 | extra_flow_ctl = 0x30; /* Eat XON/XOFF, XON/XOFF in SCHR1, SCHR2 */ |
---|
905 | } |
---|
906 | else { |
---|
907 | sw_flow_ctl = 0; /* Tx in-band flow ctl disabled */ |
---|
908 | extra_flow_ctl = 0; /* Pass on XON/XOFF */ |
---|
909 | } |
---|
910 | |
---|
911 | /* CL/LF translation */ |
---|
912 | if ( t->c_iflag & ICRNL ) |
---|
913 | icrnl = 0x40; /* Map CR to NL on input */ |
---|
914 | else |
---|
915 | icrnl = 0; /* Pass on CR */ |
---|
916 | if ( t->c_iflag & INLCR ) |
---|
917 | inlcr = 0x20; /* Map NL to CR on input */ |
---|
918 | else |
---|
919 | inlcr = 0; /* Pass on NL */ |
---|
920 | if ( t->c_iflag & IGNCR ) |
---|
921 | igncr = 0x80; /* CR discarded on input */ |
---|
922 | else |
---|
923 | igncr = 0; |
---|
924 | |
---|
925 | /* Break handling */ |
---|
926 | if ( t->c_iflag & IGNBRK ) { |
---|
927 | ignbrk = 0x10; /* Ignore break on input */ |
---|
928 | brkint = 0x08; |
---|
929 | } else { |
---|
930 | if ( t->c_iflag & BRKINT ) { |
---|
931 | ignbrk = 0; /* Generate SIGINT (interrupt ) */ |
---|
932 | brkint = 0; |
---|
933 | } else { |
---|
934 | ignbrk = 0; /* Convert to 0x00 */ |
---|
935 | brkint = 0x08; |
---|
936 | } |
---|
937 | } |
---|
938 | |
---|
939 | /* Stripping */ |
---|
940 | if ( t->c_iflag & ISTRIP ) |
---|
941 | istrip = 0x80; /* Strip to 7 bits */ |
---|
942 | else |
---|
943 | istrip = 0; /* Leave as 8 bits */ |
---|
944 | |
---|
945 | rx_period = cd2401_bitrate_divisor( 20000000Ul, &in_baud ); |
---|
946 | tx_period = cd2401_bitrate_divisor( 20000000Ul, &out_baud ); |
---|
947 | |
---|
948 | /* |
---|
949 | * If this is the first time that the line characteristics are set up, then |
---|
950 | * the device must be re-initialized. |
---|
951 | * Also check if we need to change anything. It is preferable to not touch |
---|
952 | * the device if nothing changes. As soon as we touch it, it tends to |
---|
953 | * glitch. If anything changes, we reprogram all registers. This is |
---|
954 | * harmless. |
---|
955 | */ |
---|
956 | if ( ( CD2401_Channel_Info[minor].tty == 0 ) || |
---|
957 | ( cd2401->cor1 != (parodd | parenb | ignpar | csize) ) || |
---|
958 | ( cd2401->cor2 != (sw_flow_ctl | hw_flow_ctl) ) || |
---|
959 | ( cd2401->cor3 != (extra_flow_ctl | cstopb) ) || |
---|
960 | ( cd2401->cor6 != (igncr | icrnl | inlcr | ignbrk | brkint | parmrk | inpck) ) || |
---|
961 | ( cd2401->cor7 != istrip ) || |
---|
962 | ( cd2401->u1.async.schr1 != t->c_cc[VSTART] ) || |
---|
963 | ( cd2401->u1.async.schr2 != t->c_cc[VSTOP] ) || |
---|
964 | ( cd2401->rbpr != (unsigned char)rx_period ) || |
---|
965 | ( cd2401->rcor != (unsigned char)(rx_period >> 8) ) || |
---|
966 | ( cd2401->tbpr != (unsigned char)tx_period ) || |
---|
967 | ( cd2401->tcor != ( (tx_period >> 3) & 0xE0 ) ) ) |
---|
968 | need_reinitialization = TRUE; |
---|
969 | |
---|
970 | /* Write to the ports */ |
---|
971 | rtems_interrupt_disable (level); |
---|
972 | |
---|
973 | cd2401->car = minor; /* Select channel */ |
---|
974 | read_enabled = cd2401->csr & 0x80 ? TRUE : FALSE; |
---|
975 | |
---|
976 | if ( (t->c_cflag & CREAD ? TRUE : FALSE ) != read_enabled ) { |
---|
977 | /* Read enable status is changing */ |
---|
978 | need_reinitialization = TRUE; |
---|
979 | } |
---|
980 | |
---|
981 | if ( need_reinitialization ) { |
---|
982 | /* |
---|
983 | * Could not find a way to test whether the CD2401 was done transmitting. |
---|
984 | * The TxEmpty interrupt does not seem to indicate that the FIFO is empty |
---|
985 | * in DMA mode. So, just wait a while for output to drain. May not be |
---|
986 | * enough, but it will have to do (should be long enough for 1 char at |
---|
987 | * 9600 bsp)... |
---|
988 | */ |
---|
989 | cd2401_udelay( 2000L ); |
---|
990 | |
---|
991 | /* Clear channel */ |
---|
992 | cd2401_chan_cmd (minor, 0x40, 1); |
---|
993 | |
---|
994 | cd2401->car = minor; /* Select channel */ |
---|
995 | cd2401->cmr = 0x42; /* Interrupt Rx, DMA Tx, async mode */ |
---|
996 | cd2401->cor1 = parodd | parenb | ignpar | csize; |
---|
997 | cd2401->cor2 = sw_flow_ctl | hw_flow_ctl; |
---|
998 | cd2401->cor3 = extra_flow_ctl | cstopb; |
---|
999 | cd2401->cor4 = 0x0A; /* No DSR/DCD/CTS detect; FIFO threshold of 10 */ |
---|
1000 | cd2401->cor5 = 0x0A; /* No DSR/DCD/CTS detect; DTR threshold of 10 */ |
---|
1001 | cd2401->cor6 = igncr | icrnl | inlcr | ignbrk | brkint | parmrk | inpck; |
---|
1002 | cd2401->cor7 = istrip; /* No LNext; ignore XON/XOFF if frame error; no tx translations */ |
---|
1003 | /* Special char 1: XON character */ |
---|
1004 | cd2401->u1.async.schr1 = t->c_cc[VSTART]; |
---|
1005 | /* special char 2: XOFF character */ |
---|
1006 | cd2401->u1.async.schr2 = t->c_cc[VSTOP]; |
---|
1007 | |
---|
1008 | /* |
---|
1009 | * Special chars 3 and 4, char range, LNext, RFAR[1..4] and CRC |
---|
1010 | * are unused, left as is. |
---|
1011 | */ |
---|
1012 | |
---|
1013 | /* Set baudrates for receiver and transmitter */ |
---|
1014 | cd2401->rbpr = (unsigned char)rx_period; |
---|
1015 | cd2401->rcor = (unsigned char)(rx_period >> 8); /* no DPLL */ |
---|
1016 | cd2401->tbpr = (unsigned char)tx_period; |
---|
1017 | cd2401->tcor = (tx_period >> 3) & 0xE0; /* no x1 ext clk, no loopback */ |
---|
1018 | |
---|
1019 | /* Timeout for 4 chars at 9600, 8 bits per char, 1 stop bit */ |
---|
1020 | cd2401->u2.w.rtpr = 0x04; /* NEED TO LOOK AT THIS LINE! */ |
---|
1021 | |
---|
1022 | if ( t->c_cflag & CREAD ) { |
---|
1023 | /* Re-initialize channel, enable rx and tx */ |
---|
1024 | cd2401_chan_cmd (minor, 0x2A, 1); |
---|
1025 | /* Enable rx data ints */ |
---|
1026 | cd2401->ier = 0x08; |
---|
1027 | } else { |
---|
1028 | /* Re-initialize channel, enable tx, disable rx */ |
---|
1029 | cd2401_chan_cmd (minor, 0x29, 1); |
---|
1030 | } |
---|
1031 | } |
---|
1032 | |
---|
1033 | CD2401_RECORD_SET_ATTRIBUTES_INFO(( minor, need_reinitialization, csize, |
---|
1034 | cstopb, parodd, parenb, ignpar, inpck, |
---|
1035 | hw_flow_ctl, sw_flow_ctl, extra_flow_ctl, |
---|
1036 | icrnl, igncr, inlcr, brkint, ignbrk, |
---|
1037 | parmrk, istrip, tx_period, rx_period, |
---|
1038 | out_baud, in_baud )); |
---|
1039 | |
---|
1040 | rtems_interrupt_enable (level); |
---|
1041 | |
---|
1042 | /* |
---|
1043 | * Looks like the CD2401 needs time to settle after initialization. Give it |
---|
1044 | * 10 ms. I don't really believe it, but if output resumes to quickly after |
---|
1045 | * this call, the first few characters are not right. |
---|
1046 | */ |
---|
1047 | if ( need_reinitialization ) |
---|
1048 | cd2401_udelay( 10000L ); |
---|
1049 | |
---|
1050 | /* Return something */ |
---|
1051 | return RTEMS_SUCCESSFUL; |
---|
1052 | } |
---|
1053 | |
---|
1054 | /* |
---|
1055 | * cd2401_startRemoreTx |
---|
1056 | * |
---|
1057 | * Defined as a callback, but it would appear that it is never called. The |
---|
1058 | * POSIX standard states that when the tcflow() function is called with the |
---|
1059 | * TCION action, the system wall transmit a START character. Presumably, |
---|
1060 | * tcflow() is called internally when IXOFF is set in the termios c_iflag |
---|
1061 | * field when the input buffer can accomodate enough characters. It should |
---|
1062 | * probably be called from fillBufferQueue(). Clearly, the function is also |
---|
1063 | * explicitly callable by user code. The action is clearly to send the START |
---|
1064 | * character, regardless of whether START/STOP flow control is in effect. |
---|
1065 | * |
---|
1066 | * Input parameters: |
---|
1067 | * minor - selected channel |
---|
1068 | * |
---|
1069 | * Output parameters: NONE |
---|
1070 | * |
---|
1071 | * Return value: IGNORED |
---|
1072 | * |
---|
1073 | * PROPER START CHARACTER MUST BE PROGRAMMED IN SCHR1. |
---|
1074 | */ |
---|
1075 | int cd2401_startRemoteTx( |
---|
1076 | int minor |
---|
1077 | ) |
---|
1078 | { |
---|
1079 | rtems_interrupt_level level; |
---|
1080 | |
---|
1081 | rtems_interrupt_disable (level); |
---|
1082 | |
---|
1083 | cd2401->car = minor; /* Select channel */ |
---|
1084 | cd2401->stcr = 0x01; /* Send SCHR1 ahead of chars in FIFO */ |
---|
1085 | |
---|
1086 | CD2401_RECORD_START_REMOTE_TX_INFO(( minor )); |
---|
1087 | |
---|
1088 | rtems_interrupt_enable (level); |
---|
1089 | |
---|
1090 | /* Return something */ |
---|
1091 | return RTEMS_SUCCESSFUL; |
---|
1092 | } |
---|
1093 | |
---|
1094 | /* |
---|
1095 | * cd2401_stopRemoteTx |
---|
1096 | * |
---|
1097 | * Defined as a callback, but it would appear that it is never called. The |
---|
1098 | * POSIX standard states that when the tcflow() function is called with the |
---|
1099 | * TCIOFF function, the system wall transmit a STOP character. Presumably, |
---|
1100 | * tcflow() is called internally when IXOFF is set in the termios c_iflag |
---|
1101 | * field as the input buffer is about to overflow. It should probably be |
---|
1102 | * called from rtems_termios_enqueue_raw_characters(). Clearly, the function |
---|
1103 | * is also explicitly callable by user code. The action is clearly to send |
---|
1104 | * the STOP character, regardless of whether START/STOP flow control is in |
---|
1105 | * effect. |
---|
1106 | * |
---|
1107 | * Input parameters: |
---|
1108 | * minor - selected channel |
---|
1109 | * |
---|
1110 | * Output parameters: NONE |
---|
1111 | * |
---|
1112 | * Return value: IGNORED |
---|
1113 | * |
---|
1114 | * PROPER STOP CHARACTER MUST BE PROGRAMMED IN SCHR2. |
---|
1115 | */ |
---|
1116 | int cd2401_stopRemoteTx( |
---|
1117 | int minor |
---|
1118 | ) |
---|
1119 | { |
---|
1120 | rtems_interrupt_level level; |
---|
1121 | |
---|
1122 | rtems_interrupt_disable (level); |
---|
1123 | |
---|
1124 | cd2401->car = minor; /* Select channel */ |
---|
1125 | cd2401->stcr = 0x02; /* Send SCHR2 ahead of chars in FIFO */ |
---|
1126 | |
---|
1127 | CD2401_RECORD_STOP_REMOTE_TX_INFO(( minor )); |
---|
1128 | |
---|
1129 | rtems_interrupt_enable (level); |
---|
1130 | |
---|
1131 | /* Return something */ |
---|
1132 | return RTEMS_SUCCESSFUL; |
---|
1133 | } |
---|
1134 | |
---|
1135 | /* |
---|
1136 | * cd2401_write |
---|
1137 | * |
---|
1138 | * Initiate DMA output. Termios guarantees that the buffer does not wrap |
---|
1139 | * around, so we can do DMA strait from the supplied buffer. |
---|
1140 | * |
---|
1141 | * Input parameters: |
---|
1142 | * minor - selected channel |
---|
1143 | * buf - output buffer |
---|
1144 | * len - number of chars to output |
---|
1145 | * |
---|
1146 | * Output parameters: NONE |
---|
1147 | * |
---|
1148 | * Return value: IGNORED |
---|
1149 | * |
---|
1150 | * MUST BE EXECUTED WITH THE CD2401 INTERRUPTS DISABLED! |
---|
1151 | * The processor is placed at interrupt level CD2401_INT_LEVEL explicitly in |
---|
1152 | * console_write(). The processor is necessarily at interrupt level 1 in |
---|
1153 | * cd2401_tx_isr(). |
---|
1154 | */ |
---|
1155 | ssize_t cd2401_write( |
---|
1156 | int minor, |
---|
1157 | const char *buf, |
---|
1158 | size_t len |
---|
1159 | ) |
---|
1160 | { |
---|
1161 | if (len > 0) { |
---|
1162 | cd2401->car = minor; /* Select channel */ |
---|
1163 | |
---|
1164 | if ( (cd2401->dmabsts & 0x08) == 0 ) { |
---|
1165 | /* Next buffer is A. Wait for it to be ours. */ |
---|
1166 | while ( cd2401->atbsts & 0x01 ); |
---|
1167 | |
---|
1168 | CD2401_Channel_Info[minor].own_buf_A = FALSE; |
---|
1169 | CD2401_Channel_Info[minor].len = len; |
---|
1170 | CD2401_Channel_Info[minor].buf = buf; |
---|
1171 | cd2401->atbadru = (uint16_t)( ( (uint32_t) buf ) >> 16 ); |
---|
1172 | cd2401->atbadrl = (uint16_t)( (uint32_t) buf ); |
---|
1173 | cd2401->atbcnt = len; |
---|
1174 | CD2401_RECORD_WRITE_INFO(( len, buf, 'A' )); |
---|
1175 | cd2401->atbsts = 0x03; /* CD2401 owns buffer, int when empty */ |
---|
1176 | } |
---|
1177 | else { |
---|
1178 | /* Next buffer is B. Wait for it to be ours. */ |
---|
1179 | while ( cd2401->btbsts & 0x01 ); |
---|
1180 | |
---|
1181 | CD2401_Channel_Info[minor].own_buf_B = FALSE; |
---|
1182 | CD2401_Channel_Info[minor].len = len; |
---|
1183 | CD2401_Channel_Info[minor].buf = buf; |
---|
1184 | cd2401->btbadru = (uint16_t)( ( (uint32_t) buf ) >> 16 ); |
---|
1185 | cd2401->btbadrl = (uint16_t)( (uint32_t) buf ); |
---|
1186 | cd2401->btbcnt = len; |
---|
1187 | CD2401_RECORD_WRITE_INFO(( len, buf, 'B' )); |
---|
1188 | cd2401->btbsts = 0x03; /* CD2401 owns buffer, int when empty */ |
---|
1189 | } |
---|
1190 | /* Nuts -- Need TxD ints */ |
---|
1191 | CD2401_Channel_Info[minor].txEmpty = FALSE; |
---|
1192 | cd2401->ier |= 0x01; |
---|
1193 | } |
---|
1194 | |
---|
1195 | /* Return something */ |
---|
1196 | return len; |
---|
1197 | } |
---|
1198 | |
---|
1199 | #if 0 |
---|
1200 | /* |
---|
1201 | * cd2401_drainOutput |
---|
1202 | * |
---|
1203 | * Wait for the txEmpty indication on the specified channel. |
---|
1204 | * |
---|
1205 | * Input parameters: |
---|
1206 | * minor - selected channel |
---|
1207 | * |
---|
1208 | * Output parameters: NONE |
---|
1209 | * |
---|
1210 | * Return value: IGNORED |
---|
1211 | * |
---|
1212 | * MUST NOT BE EXECUTED WITH THE CD2401 INTERRUPTS DISABLED! |
---|
1213 | * The txEmpty flag is set by the tx ISR. |
---|
1214 | * |
---|
1215 | * DOES NOT WORK! DO NOT ENABLE THIS CODE. THE CD2401 DOES NOT COOPERATE! |
---|
1216 | * The code is here to document that the output FIFO is NOT empty when |
---|
1217 | * the CD2401 reports that the Tx buffer is empty. |
---|
1218 | */ |
---|
1219 | int cd2401_drainOutput( |
---|
1220 | int minor |
---|
1221 | ) |
---|
1222 | { |
---|
1223 | CD2401_RECORD_DRAIN_OUTPUT_INFO(( CD2401_Channel_Info[minor].txEmpty, |
---|
1224 | CD2401_Channel_Info[minor].own_buf_A, |
---|
1225 | CD2401_Channel_Info[minor].own_buf_B )); |
---|
1226 | |
---|
1227 | while( ! (CD2401_Channel_Info[minor].txEmpty && |
---|
1228 | CD2401_Channel_Info[minor].own_buf_A && |
---|
1229 | CD2401_Channel_Info[minor].own_buf_B) ); |
---|
1230 | |
---|
1231 | /* Return something */ |
---|
1232 | return RTEMS_SUCCESSFUL; |
---|
1233 | } |
---|
1234 | #endif |
---|
1235 | |
---|
1236 | /* |
---|
1237 | * _167Bug_pollRead |
---|
1238 | * |
---|
1239 | * Read a character from the 167Bug console, and return it. Return -1 |
---|
1240 | * if there is no character in the input FIFO. |
---|
1241 | * |
---|
1242 | * Input parameters: |
---|
1243 | * minor - selected channel |
---|
1244 | * |
---|
1245 | * Output parameters: NONE |
---|
1246 | * |
---|
1247 | * Return value: char returned as positive signed int |
---|
1248 | * -1 if no character is present in the input FIFO. |
---|
1249 | * |
---|
1250 | * CANNOT BE COMBINED WITH INTERRUPT DRIVEN I/O! |
---|
1251 | */ |
---|
1252 | int _167Bug_pollRead( |
---|
1253 | int minor |
---|
1254 | ) |
---|
1255 | { |
---|
1256 | int char_not_available; |
---|
1257 | unsigned char c; |
---|
1258 | rtems_interrupt_level previous_level; |
---|
1259 | |
---|
1260 | /* |
---|
1261 | * Redirection of .INSTAT does not work: 167-Bug crashes. |
---|
1262 | * Switch the input stream to the specified port. |
---|
1263 | * Make sure this is atomic code. |
---|
1264 | */ |
---|
1265 | rtems_interrupt_disable( previous_level ); |
---|
1266 | |
---|
1267 | __asm__ volatile( "movew %1, -(%%sp)\n\t"/* Channel */ |
---|
1268 | "trap #15\n\t" /* Trap to 167Bug */ |
---|
1269 | ".short 0x61\n\t" /* Code for .REDIR_I */ |
---|
1270 | "trap #15\n\t" /* Trap to 167Bug */ |
---|
1271 | ".short 0x01\n\t" /* Code for .INSTAT */ |
---|
1272 | "move %%cc, %0\n\t" /* Get condition codes */ |
---|
1273 | "andil #4, %0" /* Keep the Zero bit */ |
---|
1274 | : "=d" (char_not_available) : "d" (minor): "%%cc" ); |
---|
1275 | |
---|
1276 | if (char_not_available) { |
---|
1277 | rtems_interrupt_enable( previous_level ); |
---|
1278 | return -1; |
---|
1279 | } |
---|
1280 | |
---|
1281 | /* Read the char and return it */ |
---|
1282 | __asm__ volatile( "subq.l #2,%%a7\n\t" /* Space for result */ |
---|
1283 | "trap #15\n\t" /* Trap to 167 Bug */ |
---|
1284 | ".short 0x00\n\t" /* Code for .INCHR */ |
---|
1285 | "moveb (%%a7)+, %0" /* Pop char into c */ |
---|
1286 | : "=d" (c) : ); |
---|
1287 | |
---|
1288 | rtems_interrupt_enable( previous_level ); |
---|
1289 | |
---|
1290 | return (int)c; |
---|
1291 | } |
---|
1292 | |
---|
1293 | /* |
---|
1294 | * _167Bug_pollWrite |
---|
1295 | * |
---|
1296 | * Output buffer through 167Bug. Returns only once every character has been |
---|
1297 | * sent (polled output). |
---|
1298 | * |
---|
1299 | * Input parameters: |
---|
1300 | * minor - selected channel |
---|
1301 | * buf - output buffer |
---|
1302 | * len - number of chars to output |
---|
1303 | * |
---|
1304 | * Output parameters: NONE |
---|
1305 | * |
---|
1306 | * Return value: IGNORED |
---|
1307 | * |
---|
1308 | * CANNOT BE COMBINED WITH INTERRUPT DRIVEN I/O! |
---|
1309 | */ |
---|
1310 | ssize_t _167Bug_pollWrite( |
---|
1311 | int minor, |
---|
1312 | const char *buf, |
---|
1313 | size_t len |
---|
1314 | ) |
---|
1315 | { |
---|
1316 | const char *endbuf = buf + len; |
---|
1317 | |
---|
1318 | __asm__ volatile( "pea (%0)\n\t" /* endbuf */ |
---|
1319 | "pea (%1)\n\t" /* buf */ |
---|
1320 | "movew #0x21, -(%%sp)\n\t" /* Code for .OUTSTR */ |
---|
1321 | "movew %2, -(%%sp)\n\t" /* Channel */ |
---|
1322 | "trap #15\n\t" /* Trap to 167Bug */ |
---|
1323 | ".short 0x60" /* Code for .REDIR */ |
---|
1324 | :: "a" (endbuf), "a" (buf), "d" (minor) ); |
---|
1325 | |
---|
1326 | /* Return something */ |
---|
1327 | return len; |
---|
1328 | } |
---|
1329 | |
---|
1330 | /* |
---|
1331 | * do_poll_read |
---|
1332 | * |
---|
1333 | * Input characters through 167Bug. Returns has soon as a character has been |
---|
1334 | * received. Otherwise, if we wait for the number of requested characters, we |
---|
1335 | * could be here forever! |
---|
1336 | * |
---|
1337 | * CR is converted to LF on input. The terminal should not send a CR/LF pair |
---|
1338 | * when the return or enter key is pressed. |
---|
1339 | * |
---|
1340 | * Input parameters: |
---|
1341 | * major - ignored. Should be the major number for this driver. |
---|
1342 | * minor - selected channel. |
---|
1343 | * arg->buffer - where to put the received characters. |
---|
1344 | * arg->count - number of characters to receive before returning--Ignored. |
---|
1345 | * |
---|
1346 | * Output parameters: |
---|
1347 | * arg->bytes_moved - the number of characters read. Always 1. |
---|
1348 | * |
---|
1349 | * Return value: RTEMS_SUCCESSFUL |
---|
1350 | * |
---|
1351 | * CANNOT BE COMBINED WITH INTERRUPT DRIVEN I/O! |
---|
1352 | */ |
---|
1353 | static rtems_status_code do_poll_read( |
---|
1354 | rtems_device_major_number major, |
---|
1355 | rtems_device_minor_number minor, |
---|
1356 | void * arg |
---|
1357 | ) |
---|
1358 | { |
---|
1359 | rtems_libio_rw_args_t *rw_args = arg; |
---|
1360 | int c; |
---|
1361 | |
---|
1362 | while( (c = _167Bug_pollRead (minor)) == -1 ); |
---|
1363 | rw_args->buffer[0] = (uint8_t)c; |
---|
1364 | if( rw_args->buffer[0] == '\r' ) |
---|
1365 | rw_args->buffer[0] = '\n'; |
---|
1366 | rw_args->bytes_moved = 1; |
---|
1367 | return RTEMS_SUCCESSFUL; |
---|
1368 | } |
---|
1369 | |
---|
1370 | /* |
---|
1371 | * do_poll_write |
---|
1372 | * |
---|
1373 | * Output characters through 167Bug. Returns only once every character has |
---|
1374 | * been sent. |
---|
1375 | * |
---|
1376 | * CR is transmitted AFTER a LF on output. |
---|
1377 | * |
---|
1378 | * Input parameters: |
---|
1379 | * major - ignored. Should be the major number for this driver. |
---|
1380 | * minor - selected channel |
---|
1381 | * arg->buffer - where to get the characters to transmit. |
---|
1382 | * arg->count - the number of characters to transmit before returning. |
---|
1383 | * |
---|
1384 | * Output parameters: |
---|
1385 | * arg->bytes_moved - the number of characters read |
---|
1386 | * |
---|
1387 | * Return value: RTEMS_SUCCESSFUL |
---|
1388 | * |
---|
1389 | * CANNOT BE COMBINED WITH INTERRUPT DRIVEN I/O! |
---|
1390 | */ |
---|
1391 | static rtems_status_code do_poll_write( |
---|
1392 | rtems_device_major_number major, |
---|
1393 | rtems_device_minor_number minor, |
---|
1394 | void * arg |
---|
1395 | ) |
---|
1396 | { |
---|
1397 | rtems_libio_rw_args_t *rw_args = arg; |
---|
1398 | uint32_t i; |
---|
1399 | |
---|
1400 | for( i = 0; i < rw_args->count; i++ ) { |
---|
1401 | _167Bug_pollWrite(minor, &(rw_args->buffer[i]), 1); |
---|
1402 | if ( rw_args->buffer[i] == '\n' ) |
---|
1403 | _167Bug_pollWrite(minor, &cr_char, 1); |
---|
1404 | } |
---|
1405 | rw_args->bytes_moved = i; |
---|
1406 | return RTEMS_SUCCESSFUL; |
---|
1407 | } |
---|
1408 | |
---|
1409 | /* |
---|
1410 | * _BSP_output_char |
---|
1411 | * |
---|
1412 | * printk() function prototyped in bspIo.h. Does not use termios. |
---|
1413 | */ |
---|
1414 | void _BSP_output_char(char c) |
---|
1415 | { |
---|
1416 | rtems_device_minor_number printk_minor; |
---|
1417 | |
---|
1418 | /* |
---|
1419 | * Can't rely on console_initialize having been called before this function |
---|
1420 | * is used. |
---|
1421 | */ |
---|
1422 | if ( NVRAM_CONFIGURE ) |
---|
1423 | /* J1-4 is on, use NVRAM info for configuration */ |
---|
1424 | printk_minor = (nvram->console_printk_port & 0x30) >> 4; |
---|
1425 | else |
---|
1426 | printk_minor = PRINTK_MINOR; |
---|
1427 | |
---|
1428 | _167Bug_pollWrite(printk_minor, &c, 1); |
---|
1429 | if ( c == '\n' ) |
---|
1430 | _167Bug_pollWrite(printk_minor, &cr_char, 1); |
---|
1431 | } |
---|
1432 | |
---|
1433 | /* |
---|
1434 | *************** |
---|
1435 | * BOILERPLATE * |
---|
1436 | *************** |
---|
1437 | * |
---|
1438 | * All these functions are prototyped in rtems/c/src/lib/include/console.h. |
---|
1439 | */ |
---|
1440 | |
---|
1441 | /* |
---|
1442 | * Initialize and register the device |
---|
1443 | */ |
---|
1444 | rtems_device_driver console_initialize( |
---|
1445 | rtems_device_major_number major, |
---|
1446 | rtems_device_minor_number minor, |
---|
1447 | void *arg |
---|
1448 | ) |
---|
1449 | { |
---|
1450 | rtems_status_code status; |
---|
1451 | rtems_device_minor_number console_minor; |
---|
1452 | |
---|
1453 | /* |
---|
1454 | * Set up TERMIOS if needed |
---|
1455 | */ |
---|
1456 | if ( NVRAM_CONFIGURE ) { |
---|
1457 | /* J1-4 is on, use NVRAM info for configuration */ |
---|
1458 | console_minor = nvram->console_printk_port & 0x03; |
---|
1459 | |
---|
1460 | if ( nvram->console_mode & 0x01 ) |
---|
1461 | /* termios */ |
---|
1462 | rtems_termios_initialize (); |
---|
1463 | } |
---|
1464 | else { |
---|
1465 | console_minor = CONSOLE_MINOR; |
---|
1466 | #if CD2401_USE_TERMIOS == 1 |
---|
1467 | rtems_termios_initialize (); |
---|
1468 | #endif |
---|
1469 | } |
---|
1470 | |
---|
1471 | /* |
---|
1472 | * Do device-specific initialization |
---|
1473 | * Does not affect 167-Bug. |
---|
1474 | */ |
---|
1475 | cd2401_initialize (); |
---|
1476 | |
---|
1477 | /* |
---|
1478 | * Register the devices |
---|
1479 | */ |
---|
1480 | status = rtems_io_register_name ("/dev/tty0", major, 0); |
---|
1481 | if (status != RTEMS_SUCCESSFUL) |
---|
1482 | rtems_fatal_error_occurred (status); |
---|
1483 | |
---|
1484 | status = rtems_io_register_name ("/dev/tty1", major, 1); |
---|
1485 | if (status != RTEMS_SUCCESSFUL) |
---|
1486 | rtems_fatal_error_occurred (status); |
---|
1487 | |
---|
1488 | status = rtems_io_register_name ("/dev/console", major, console_minor); |
---|
1489 | if (status != RTEMS_SUCCESSFUL) |
---|
1490 | rtems_fatal_error_occurred (status); |
---|
1491 | |
---|
1492 | status = rtems_io_register_name ("/dev/tty2", major, 2); |
---|
1493 | if (status != RTEMS_SUCCESSFUL) |
---|
1494 | rtems_fatal_error_occurred (status); |
---|
1495 | |
---|
1496 | status = rtems_io_register_name ("/dev/tty3", major, 3); |
---|
1497 | if (status != RTEMS_SUCCESSFUL) |
---|
1498 | rtems_fatal_error_occurred (status); |
---|
1499 | |
---|
1500 | return RTEMS_SUCCESSFUL; |
---|
1501 | } |
---|
1502 | |
---|
1503 | /* |
---|
1504 | * Open the device |
---|
1505 | */ |
---|
1506 | rtems_device_driver console_open( |
---|
1507 | rtems_device_major_number major, |
---|
1508 | rtems_device_minor_number minor, |
---|
1509 | void * arg |
---|
1510 | ) |
---|
1511 | { |
---|
1512 | static const rtems_termios_callbacks pollCallbacks = { |
---|
1513 | NULL, /* firstOpen */ |
---|
1514 | NULL, /* lastClose */ |
---|
1515 | _167Bug_pollRead, /* pollRead */ |
---|
1516 | _167Bug_pollWrite, /* write */ |
---|
1517 | NULL, /* setAttributes */ |
---|
1518 | NULL, /* stopRemoteTx */ |
---|
1519 | NULL, /* startRemoteTx */ |
---|
1520 | 0 /* outputUsesInterrupts */ |
---|
1521 | }; |
---|
1522 | |
---|
1523 | static const rtems_termios_callbacks intrCallbacks = { |
---|
1524 | cd2401_firstOpen, /* firstOpen */ |
---|
1525 | cd2401_lastClose, /* lastClose */ |
---|
1526 | NULL, /* pollRead */ |
---|
1527 | cd2401_write, /* write */ |
---|
1528 | cd2401_setAttributes, /* setAttributes */ |
---|
1529 | cd2401_stopRemoteTx, /* stopRemoteTx */ |
---|
1530 | cd2401_startRemoteTx, /* startRemoteTx */ |
---|
1531 | 1 /* outputUsesInterrupts */ |
---|
1532 | }; |
---|
1533 | |
---|
1534 | if ( NVRAM_CONFIGURE ) |
---|
1535 | /* J1-4 is on, use NVRAM info for configuration */ |
---|
1536 | if ( nvram->console_mode & 0x01 ) |
---|
1537 | /* termios */ |
---|
1538 | if ( nvram->console_mode & 0x02 ) |
---|
1539 | /* interrupt-driven I/O */ |
---|
1540 | return rtems_termios_open (major, minor, arg, &intrCallbacks); |
---|
1541 | else |
---|
1542 | /* polled I/O */ |
---|
1543 | return rtems_termios_open (major, minor, arg, &pollCallbacks); |
---|
1544 | else |
---|
1545 | /* no termios -- default to polled I/O */ |
---|
1546 | return RTEMS_SUCCESSFUL; |
---|
1547 | #if CD2401_USE_TERMIOS == 1 |
---|
1548 | #if CD2401_IO_MODE != 1 |
---|
1549 | else |
---|
1550 | /* termios & polled I/O*/ |
---|
1551 | return rtems_termios_open (major, minor, arg, &pollCallbacks); |
---|
1552 | #else |
---|
1553 | else |
---|
1554 | /* termios & interrupt-driven I/O*/ |
---|
1555 | return rtems_termios_open (major, minor, arg, &intrCallbacks); |
---|
1556 | #endif |
---|
1557 | #else |
---|
1558 | else |
---|
1559 | /* no termios -- default to polled I/O */ |
---|
1560 | return RTEMS_SUCCESSFUL; |
---|
1561 | #endif |
---|
1562 | } |
---|
1563 | |
---|
1564 | /* |
---|
1565 | * Close the device |
---|
1566 | */ |
---|
1567 | rtems_device_driver console_close( |
---|
1568 | rtems_device_major_number major, |
---|
1569 | rtems_device_minor_number minor, |
---|
1570 | void * arg |
---|
1571 | ) |
---|
1572 | { |
---|
1573 | if ( NVRAM_CONFIGURE ) { |
---|
1574 | /* J1-4 is on, use NVRAM info for configuration */ |
---|
1575 | if ( nvram->console_mode & 0x01 ) |
---|
1576 | /* termios */ |
---|
1577 | return rtems_termios_close (arg); |
---|
1578 | else |
---|
1579 | /* no termios */ |
---|
1580 | return RTEMS_SUCCESSFUL; |
---|
1581 | } |
---|
1582 | #if CD2401_USE_TERMIOS == 1 |
---|
1583 | else |
---|
1584 | /* termios */ |
---|
1585 | return rtems_termios_close (arg); |
---|
1586 | #else |
---|
1587 | else |
---|
1588 | /* no termios */ |
---|
1589 | return RTEMS_SUCCESSFUL; |
---|
1590 | #endif |
---|
1591 | } |
---|
1592 | |
---|
1593 | /* |
---|
1594 | * Read from the device |
---|
1595 | */ |
---|
1596 | rtems_device_driver console_read( |
---|
1597 | rtems_device_major_number major, |
---|
1598 | rtems_device_minor_number minor, |
---|
1599 | void * arg |
---|
1600 | ) |
---|
1601 | { |
---|
1602 | if ( NVRAM_CONFIGURE ) { |
---|
1603 | /* J1-4 is on, use NVRAM info for configuration */ |
---|
1604 | if ( nvram->console_mode & 0x01 ) |
---|
1605 | /* termios */ |
---|
1606 | return rtems_termios_read (arg); |
---|
1607 | else |
---|
1608 | /* no termios -- default to polled */ |
---|
1609 | return do_poll_read (major, minor, arg); |
---|
1610 | } |
---|
1611 | #if CD2401_USE_TERMIOS == 1 |
---|
1612 | else |
---|
1613 | /* termios */ |
---|
1614 | return rtems_termios_read (arg); |
---|
1615 | #else |
---|
1616 | else |
---|
1617 | /* no termios -- default to polled */ |
---|
1618 | return do_poll_read (major, minor, arg); |
---|
1619 | #endif |
---|
1620 | } |
---|
1621 | |
---|
1622 | /* |
---|
1623 | * Write to the device |
---|
1624 | */ |
---|
1625 | rtems_device_driver console_write( |
---|
1626 | rtems_device_major_number major, |
---|
1627 | rtems_device_minor_number minor, |
---|
1628 | void * arg |
---|
1629 | ) |
---|
1630 | { |
---|
1631 | if ( NVRAM_CONFIGURE ) { |
---|
1632 | /* J1-4 is on, use NVRAM info for configuration */ |
---|
1633 | if ( nvram->console_mode & 0x01 ) |
---|
1634 | /* termios */ |
---|
1635 | return rtems_termios_write (arg); |
---|
1636 | else |
---|
1637 | /* no termios -- default to polled */ |
---|
1638 | return do_poll_write (major, minor, arg); |
---|
1639 | } |
---|
1640 | #if CD2401_USE_TERMIOS == 1 |
---|
1641 | else |
---|
1642 | /* termios */ |
---|
1643 | return rtems_termios_write (arg); |
---|
1644 | #else |
---|
1645 | else |
---|
1646 | /* no termios -- default to polled */ |
---|
1647 | return do_poll_write (major, minor, arg); |
---|
1648 | #endif |
---|
1649 | } |
---|
1650 | |
---|
1651 | /* |
---|
1652 | * Handle ioctl request. |
---|
1653 | */ |
---|
1654 | rtems_device_driver console_control( |
---|
1655 | rtems_device_major_number major, |
---|
1656 | rtems_device_minor_number minor, |
---|
1657 | void * arg |
---|
1658 | ) |
---|
1659 | { |
---|
1660 | if ( NVRAM_CONFIGURE ) { |
---|
1661 | /* J1-4 is on, use NVRAM info for configuration */ |
---|
1662 | if ( nvram->console_mode & 0x01 ) |
---|
1663 | /* termios */ |
---|
1664 | return rtems_termios_ioctl (arg); |
---|
1665 | else |
---|
1666 | /* no termios -- default to polled */ |
---|
1667 | return RTEMS_SUCCESSFUL; |
---|
1668 | } |
---|
1669 | #if CD2401_USE_TERMIOS == 1 |
---|
1670 | else |
---|
1671 | /* termios */ |
---|
1672 | return rtems_termios_ioctl (arg); |
---|
1673 | #else |
---|
1674 | else |
---|
1675 | /* no termios -- default to polled */ |
---|
1676 | return RTEMS_SUCCESSFUL; |
---|
1677 | #endif |
---|
1678 | } |
---|