[9bf34835] | 1 | /* |
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[dce1032b] | 2 | * Console driver for Milkymist |
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[9bf34835] | 3 | * |
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| 4 | * The license and distribution terms for this file may be |
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| 5 | * found in the file LICENSE in this distribution or at |
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[c499856] | 6 | * http://www.rtems.org/license/LICENSE. |
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[9bf34835] | 7 | * |
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[dce1032b] | 8 | * COPYRIGHT (c) 2010 Sebastien Bourdeauducq |
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[9bf34835] | 9 | */ |
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| 10 | |
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[dce1032b] | 11 | #include <unistd.h> |
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| 12 | #include <termios.h> |
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[9bf34835] | 13 | |
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| 14 | #include <rtems.h> |
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[1c77a36] | 15 | #include <rtems/bspIo.h> |
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[9bf34835] | 16 | #include <rtems/libio.h> |
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[dce1032b] | 17 | #include <rtems/console.h> |
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| 18 | #include <rtems/termiostypes.h> |
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| 19 | #include <bsp/irq-generic.h> |
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[9bf34835] | 20 | |
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[dce1032b] | 21 | #include "../include/system_conf.h" |
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| 22 | #include "uart.h" |
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[9bf34835] | 23 | |
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[dce1032b] | 24 | BSP_output_char_function_type BSP_output_char = BSP_uart_polled_write; |
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| 25 | BSP_polling_getchar_function_type BSP_poll_char = BSP_uart_polled_read; |
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[9bf34835] | 26 | |
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[dce1032b] | 27 | static struct rtems_termios_tty *tty; |
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| 28 | |
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| 29 | static int mmconsole_first_open(int major, int minor, void *arg) |
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[9bf34835] | 30 | { |
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[dce1032b] | 31 | tty = ((rtems_libio_open_close_args_t *) arg)->iop->data1; |
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| 32 | return rtems_termios_set_initial_baud(tty, UART_BAUD_RATE); |
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| 33 | } |
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[9bf34835] | 34 | |
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[dce1032b] | 35 | static int mmconsole_last_close(int major, int minor, void *arg) |
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| 36 | { |
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| 37 | return 0; |
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| 38 | } |
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[9bf34835] | 39 | |
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[dce1032b] | 40 | static int mmconsole_set_attributes(int minor, const struct termios *t) |
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| 41 | { |
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| 42 | int baud; |
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[9bf34835] | 43 | |
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[1c6926c1] | 44 | switch (t->c_ospeed) { |
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[dce1032b] | 45 | case B0: |
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| 46 | baud = 0; |
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| 47 | break; |
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| 48 | case B50: |
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| 49 | baud = 50; |
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| 50 | break; |
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| 51 | case B75: |
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| 52 | baud = 75; |
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| 53 | break; |
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| 54 | case B110: |
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| 55 | baud = 110; |
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| 56 | break; |
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| 57 | case B134: |
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| 58 | baud = 134; |
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| 59 | break; |
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| 60 | case B150: |
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| 61 | baud = 150; |
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| 62 | break; |
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| 63 | case B200: |
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| 64 | baud = 200; |
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| 65 | break; |
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| 66 | case B300: |
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| 67 | baud = 300; |
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| 68 | break; |
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| 69 | case B600: |
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| 70 | baud = 600; |
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| 71 | break; |
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| 72 | case B1200: |
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| 73 | baud = 1200; |
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| 74 | break; |
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| 75 | case B1800: |
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| 76 | baud = 1800; |
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| 77 | break; |
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| 78 | case B2400: |
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| 79 | baud = 2400; |
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| 80 | break; |
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| 81 | case B4800: |
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| 82 | baud = 4800; |
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| 83 | break; |
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| 84 | case B9600: |
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| 85 | baud = 9600; |
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| 86 | break; |
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| 87 | case B19200: |
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| 88 | baud = 19200; |
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| 89 | break; |
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| 90 | case B38400: |
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| 91 | baud = 38400; |
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| 92 | break; |
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| 93 | case B57600: |
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| 94 | baud = 57600; |
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| 95 | break; |
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| 96 | case B115200: |
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| 97 | baud = 115200; |
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| 98 | break; |
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| 99 | case B230400: |
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| 100 | baud = 230400; |
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| 101 | break; |
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| 102 | case B460800: |
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| 103 | baud = 460800; |
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| 104 | break; |
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| 105 | default: |
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| 106 | baud = -1; |
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| 107 | break; |
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| 108 | } |
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[9bf34835] | 109 | |
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[dce1032b] | 110 | if (baud > 0) |
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[b8ee42c] | 111 | MM_WRITE(MM_UART_DIV, MM_READ(MM_FREQUENCY)/baud/16); |
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[9bf34835] | 112 | |
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[dce1032b] | 113 | return 0; |
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| 114 | } |
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[9bf34835] | 115 | |
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[dce1032b] | 116 | static ssize_t mmconsole_write(int minor, const char *buf, size_t n) |
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[9bf34835] | 117 | { |
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[e18db9f] | 118 | if (n > 0) { |
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| 119 | MM_WRITE(MM_UART_RXTX, *buf); |
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| 120 | } |
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[9bf34835] | 121 | |
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[dce1032b] | 122 | return 0; |
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| 123 | } |
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[9bf34835] | 124 | |
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[0f653ba] | 125 | static rtems_isr mmconsole_interrupt(rtems_vector_number n) |
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[dce1032b] | 126 | { |
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| 127 | char c; |
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[0f653ba] | 128 | while (MM_READ(MM_UART_STAT) & UART_STAT_RX_EVT) { |
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| 129 | c = MM_READ(MM_UART_RXTX); |
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| 130 | MM_WRITE(MM_UART_STAT, UART_STAT_RX_EVT); |
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| 131 | rtems_termios_enqueue_raw_characters(tty, &c, 1); |
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| 132 | } |
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| 133 | if (MM_READ(MM_UART_STAT) & UART_STAT_TX_EVT) { |
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| 134 | MM_WRITE(MM_UART_STAT, UART_STAT_TX_EVT); |
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| 135 | rtems_termios_dequeue_characters(tty, 1); |
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| 136 | } |
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| 137 | lm32_interrupt_ack(1 << MM_IRQ_UART); |
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[9bf34835] | 138 | } |
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| 139 | |
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[dce1032b] | 140 | static const rtems_termios_callbacks mmconsole_callbacks = { |
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| 141 | .firstOpen = mmconsole_first_open, |
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| 142 | .lastClose = mmconsole_last_close, |
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| 143 | .pollRead = NULL, |
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| 144 | .write = mmconsole_write, |
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| 145 | .setAttributes = mmconsole_set_attributes, |
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| 146 | .stopRemoteTx = NULL, |
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| 147 | .startRemoteTx = NULL, |
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| 148 | .outputUsesInterrupts = TERMIOS_IRQ_DRIVEN |
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| 149 | }; |
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[9bf34835] | 150 | |
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[dce1032b] | 151 | rtems_device_driver console_initialize( |
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| 152 | rtems_device_major_number major, |
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| 153 | rtems_device_minor_number minor, |
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| 154 | void *arg |
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[9bf34835] | 155 | ) |
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| 156 | { |
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[dce1032b] | 157 | rtems_status_code status; |
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| 158 | rtems_isr_entry dummy; |
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[9bf34835] | 159 | |
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[dce1032b] | 160 | rtems_termios_initialize(); |
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[9bf34835] | 161 | |
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[dce1032b] | 162 | status = rtems_io_register_name("/dev/console", major, 0); |
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| 163 | if (status != RTEMS_SUCCESSFUL) |
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| 164 | rtems_fatal_error_occurred(status); |
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| 165 | |
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[0f653ba] | 166 | rtems_interrupt_catch(mmconsole_interrupt, MM_IRQ_UART, &dummy); |
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| 167 | bsp_interrupt_vector_enable(MM_IRQ_UART); |
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| 168 | MM_WRITE(MM_UART_CTRL, UART_CTRL_RX_INT|UART_CTRL_TX_INT); |
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[dce1032b] | 169 | |
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| 170 | return RTEMS_SUCCESSFUL; |
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| 171 | } |
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[9bf34835] | 172 | |
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| 173 | rtems_device_driver console_open( |
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| 174 | rtems_device_major_number major, |
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| 175 | rtems_device_minor_number minor, |
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[dce1032b] | 176 | void *arg |
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[9bf34835] | 177 | ) |
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| 178 | { |
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[dce1032b] | 179 | return rtems_termios_open(major, minor, arg, &mmconsole_callbacks); |
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[9bf34835] | 180 | } |
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| 181 | |
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| 182 | rtems_device_driver console_close( |
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| 183 | rtems_device_major_number major, |
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| 184 | rtems_device_minor_number minor, |
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[dce1032b] | 185 | void *arg |
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[9bf34835] | 186 | ) |
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| 187 | { |
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[dce1032b] | 188 | return rtems_termios_close(arg); |
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[9bf34835] | 189 | } |
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| 190 | |
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| 191 | rtems_device_driver console_read( |
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| 192 | rtems_device_major_number major, |
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| 193 | rtems_device_minor_number minor, |
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[dce1032b] | 194 | void *arg |
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[9bf34835] | 195 | ) |
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| 196 | { |
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[dce1032b] | 197 | return rtems_termios_read(arg); |
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[9bf34835] | 198 | } |
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| 199 | |
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| 200 | rtems_device_driver console_write( |
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| 201 | rtems_device_major_number major, |
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| 202 | rtems_device_minor_number minor, |
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[dce1032b] | 203 | void *arg |
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[9bf34835] | 204 | ) |
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| 205 | { |
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[dce1032b] | 206 | return rtems_termios_write(arg); |
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[9bf34835] | 207 | } |
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| 208 | |
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| 209 | rtems_device_driver console_control( |
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| 210 | rtems_device_major_number major, |
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| 211 | rtems_device_minor_number minor, |
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[dce1032b] | 212 | void *arg |
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[9bf34835] | 213 | ) |
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| 214 | { |
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[dce1032b] | 215 | return rtems_termios_ioctl(arg); |
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[9bf34835] | 216 | } |
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