[572484f] | 1 | /* |
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| 2 | * Multi UART console serial I/O. |
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| 3 | * |
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| 4 | * TO DO: Add DMA input/output |
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| 5 | */ |
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| 6 | |
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| 7 | #include <stdio.h> |
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| 8 | #include <fcntl.h> |
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| 9 | #include <rtems/libio.h> |
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| 10 | #include <rtems/termiostypes.h> |
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| 11 | #include <termios.h> |
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| 12 | #include <bsp.h> |
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| 13 | #include <malloc.h> |
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| 14 | #include <rtems/mw_uid.h> |
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| 15 | |
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| 16 | #include <rtems/bspIo.h> |
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| 17 | |
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| 18 | #define UART_INTC0_IRQ_VECTOR(x) (64+13+(x)) |
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| 19 | |
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| 20 | #define MCF5282_UART_USR_ERROR ( MCF5282_UART_USR_RB | \ |
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| 21 | MCF5282_UART_USR_FE | \ |
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| 22 | MCF5282_UART_USR_PE | \ |
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| 23 | MCF5282_UART_USR_OE ) |
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| 24 | |
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| 25 | static int IntUartPollWrite(int minor, const char *buf, int len); |
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| 26 | static int IntUartInterruptWrite (int minor, const char *buf, int len); |
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| 27 | |
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| 28 | static void |
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| 29 | _BSP_null_char( char c ) |
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| 30 | { |
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| 31 | int level; |
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| 32 | |
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| 33 | if (c == '\n') |
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| 34 | _BSP_null_char('\r'); |
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| 35 | rtems_interrupt_disable(level); |
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| 36 | while ( (MCF5282_UART_USR(CONSOLE_PORT) & MCF5282_UART_USR_TXRDY) == 0 ) |
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| 37 | continue; |
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| 38 | MCF5282_UART_UTB(CONSOLE_PORT) = c; |
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| 39 | while ( (MCF5282_UART_USR(CONSOLE_PORT) & MCF5282_UART_USR_TXRDY) == 0 ) |
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| 40 | continue; |
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| 41 | rtems_interrupt_enable(level); |
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| 42 | } |
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| 43 | BSP_output_char_function_type BSP_output_char = _BSP_null_char; |
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| 44 | |
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| 45 | #define MAX_UART_INFO 3 |
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| 46 | #define RX_BUFFER_SIZE 512 |
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| 47 | |
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| 48 | struct IntUartInfoStruct |
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| 49 | { |
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| 50 | int iomode; |
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| 51 | volatile int uimr; |
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| 52 | int baud; |
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| 53 | int databits; |
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| 54 | int parity; |
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| 55 | int stopbits; |
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| 56 | int hwflow; |
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| 57 | int rx_in; |
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| 58 | int rx_out; |
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| 59 | char rx_buffer[RX_BUFFER_SIZE]; |
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| 60 | void *ttyp; |
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| 61 | }; |
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| 62 | |
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| 63 | struct IntUartInfoStruct IntUartInfo[MAX_UART_INFO]; |
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| 64 | |
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| 65 | static int GetBaud( int baudHandle ) |
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| 66 | { |
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| 67 | int baud = 9600; |
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| 68 | switch ( baudHandle ) |
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| 69 | { |
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| 70 | case B0: |
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| 71 | baud = (int)0; |
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| 72 | break; |
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| 73 | case B1200: |
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| 74 | baud = (int)1200; |
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| 75 | break; |
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| 76 | case B2400: |
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| 77 | baud = (int)2400; |
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| 78 | break; |
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| 79 | case B4800: |
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| 80 | baud = (int)4800; |
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| 81 | break; |
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| 82 | case B9600: |
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| 83 | baud = (int)9600; |
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| 84 | break; |
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| 85 | case B19200: |
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| 86 | baud = (int)19200; |
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| 87 | break; |
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| 88 | case B38400: |
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| 89 | baud = (int)38400; |
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| 90 | break; |
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| 91 | case B57600: |
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| 92 | baud = (int)57600; |
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| 93 | break; |
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| 94 | case B115200: |
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| 95 | baud = (int)115200; |
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| 96 | break; |
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| 97 | /* case B576000: |
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| 98 | baud = (int)576000; */ |
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| 99 | break; |
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| 100 | } |
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| 101 | return ( baud ); |
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| 102 | } |
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| 103 | |
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| 104 | /*************************************************************************** |
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| 105 | Function : IntUartSet |
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| 106 | |
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| 107 | Description : This updates the hardware UART settings. |
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| 108 | ***************************************************************************/ |
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| 109 | static void |
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| 110 | IntUartSet(int minor, int baud, int databits, int parity, int stopbits, int hwflow) |
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| 111 | { |
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| 112 | int divisor; |
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| 113 | unsigned32 clock_speed; |
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| 114 | unsigned8 umr1 = 0; |
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| 115 | unsigned8 umr2 = 0; |
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| 116 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 117 | int level; |
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| 118 | |
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| 119 | rtems_interrupt_disable(level); |
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| 120 | |
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| 121 | |
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| 122 | /* disable interrupts, clear RTS line, and disable the UARTS */ |
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| 123 | MCF5282_UART_UIMR(minor) = 0; |
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| 124 | MCF5282_UART_UOP0(minor) = 1; |
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| 125 | MCF5282_UART_UCR(minor) = (MCF5282_UART_UCR_TX_DISABLED | MCF5282_UART_UCR_RX_DISABLED); |
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| 126 | |
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| 127 | /* save the current values */ |
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| 128 | info->uimr = 0; |
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| 129 | info->baud = baud; |
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| 130 | info->databits = databits; |
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| 131 | info->parity = parity; |
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| 132 | info->stopbits = stopbits; |
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| 133 | info->hwflow = hwflow; |
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| 134 | |
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| 135 | clock_speed = get_CPU_clock_speed(); |
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| 136 | /* determine the baud divisor value */ |
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| 137 | divisor = (clock_speed / ( 32 * baud )); |
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| 138 | if ( divisor < 2 ) |
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| 139 | divisor = 2; |
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| 140 | |
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| 141 | /* check to see if doing hardware flow control */ |
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| 142 | if ( hwflow ) |
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| 143 | { |
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| 144 | /* set hardware flow options */ |
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| 145 | umr1 |= MCF5282_UART_UMR1_RXRTS; |
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| 146 | umr2 |= MCF5282_UART_UMR2_TXCTS; |
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| 147 | } |
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| 148 | |
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| 149 | /* determine the new umr values */ |
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| 150 | umr1 |= (parity | databits); |
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| 151 | umr2 |= (stopbits); |
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| 152 | |
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| 153 | /* reset the uart */ |
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| 154 | MCF5282_UART_UCR(minor) = MCF5282_UART_UCR_RESET_ERROR; |
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| 155 | MCF5282_UART_UCR(minor) = MCF5282_UART_UCR_RESET_RX; |
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| 156 | MCF5282_UART_UCR(minor) = MCF5282_UART_UCR_RESET_TX; |
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| 157 | |
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| 158 | /* reset the uart mode register and update values */ |
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| 159 | MCF5282_UART_UCR(minor) = MCF5282_UART_UCR_RESET_MR; |
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| 160 | MCF5282_UART_UMR(minor) = umr1; |
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| 161 | MCF5282_UART_UMR(minor) = umr2; |
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| 162 | |
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| 163 | /* set the baud rate values */ |
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| 164 | MCF5282_UART_UCSR(minor) = (MCF5282_UART_UCSR_RCS_SYS_CLK | MCF5282_UART_UCSR_TCS_SYS_CLK); |
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| 165 | MCF5282_UART_UBG1(minor) = (divisor & 0xff00) >> 8; |
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| 166 | MCF5282_UART_UBG2(minor) = (divisor & 0x00ff); |
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| 167 | |
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| 168 | /* enable the uart */ |
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| 169 | MCF5282_UART_UCR(minor) = (MCF5282_UART_UCR_TX_ENABLED | MCF5282_UART_UCR_RX_ENABLED); |
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| 170 | |
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| 171 | /* check to see if interrupts need to be enabled */ |
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| 172 | if ( info->iomode != TERMIOS_POLLED ) |
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| 173 | { |
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| 174 | /* enable rx interrupts */ |
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| 175 | info->uimr |= MCF5282_UART_UIMR_FFULL; |
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| 176 | MCF5282_UART_UIMR(minor) = info->uimr; |
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| 177 | } |
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| 178 | |
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| 179 | /* check to see if doing hardware flow control */ |
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| 180 | if ( hwflow ) |
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| 181 | { |
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| 182 | /* assert the RTS line */ |
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| 183 | MCF5282_UART_UOP1(minor) = 1; |
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| 184 | } |
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| 185 | |
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| 186 | rtems_interrupt_enable(level); |
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| 187 | |
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| 188 | } |
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| 189 | |
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| 190 | |
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| 191 | /*************************************************************************** |
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| 192 | Function : IntUartSetAttributes |
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| 193 | |
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| 194 | Description : This provides the hardware-dependent portion of tcsetattr(). |
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| 195 | value and sets it. At the moment this just sets the baud rate. |
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| 196 | |
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| 197 | Note: The highest baudrate is 115200 as this stays within |
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| 198 | an error of +/- 5% at 25MHz processor clock |
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| 199 | ***************************************************************************/ |
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| 200 | static int |
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| 201 | IntUartSetAttributes(int minor, const struct termios *t) |
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| 202 | { |
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| 203 | /* set default index values */ |
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| 204 | int baud = (int)9600; |
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| 205 | int databits = (int)MCF5282_UART_UMR1_BC_8; |
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| 206 | int parity = (int)MCF5282_UART_UMR1_PM_NONE; |
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| 207 | int stopbits = (int)MCF5282_UART_UMR2_STOP_BITS_1; |
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| 208 | int hwflow = (int)0; |
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| 209 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 210 | |
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| 211 | /* check to see if input is valid */ |
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| 212 | if ( t != (const struct termios *)0 ) |
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| 213 | { |
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| 214 | /* determine baud rate index */ |
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| 215 | baud = GetBaud( t->c_cflag & CBAUD ); |
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| 216 | |
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| 217 | /* determine data bits */ |
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| 218 | switch ( t->c_cflag & CSIZE ) |
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| 219 | { |
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| 220 | case CS5: |
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| 221 | databits = (int)MCF5282_UART_UMR1_BC_5; |
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| 222 | break; |
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| 223 | case CS6: |
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| 224 | databits = (int)MCF5282_UART_UMR1_BC_6; |
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| 225 | break; |
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| 226 | case CS7: |
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| 227 | databits = (int)MCF5282_UART_UMR1_BC_7; |
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| 228 | break; |
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| 229 | case CS8: |
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| 230 | databits = (int)MCF5282_UART_UMR1_BC_8; |
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| 231 | break; |
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| 232 | } |
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| 233 | |
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| 234 | /* determine if parity is enabled */ |
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| 235 | if ( t->c_cflag & PARENB ) |
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| 236 | { |
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| 237 | if ( t->c_cflag & PARODD ) |
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| 238 | { |
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| 239 | /* odd parity */ |
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| 240 | parity = (int)MCF5282_UART_UMR1_PM_ODD; |
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| 241 | } |
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| 242 | else |
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| 243 | { |
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| 244 | /* even parity */ |
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| 245 | parity = (int)MCF5282_UART_UMR1_PM_EVEN; |
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| 246 | } |
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| 247 | } |
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| 248 | |
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| 249 | /* determine stop bits */ |
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| 250 | if ( t->c_cflag & CSTOPB ) |
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| 251 | { |
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| 252 | /* two stop bits */ |
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| 253 | stopbits = (int)MCF5282_UART_UMR2_STOP_BITS_2; |
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| 254 | } |
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| 255 | |
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| 256 | /* check to see if hardware flow control */ |
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| 257 | if ( t->c_cflag & CRTSCTS ) |
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| 258 | { |
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| 259 | hwflow = 1; |
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| 260 | } |
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| 261 | } |
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| 262 | |
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| 263 | /* check to see if values have changed */ |
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| 264 | if ( ( baud != info->baud ) || |
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| 265 | ( databits != info->databits ) || |
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| 266 | ( parity != info->parity ) || |
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| 267 | ( stopbits != info->stopbits ) || |
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| 268 | ( hwflow != info->hwflow ) ) |
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| 269 | { |
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| 270 | |
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| 271 | /* call function to set values */ |
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| 272 | IntUartSet(minor, baud, databits, parity, stopbits, hwflow); |
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| 273 | } |
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| 274 | |
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| 275 | return( RTEMS_SUCCESSFUL ); |
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| 276 | |
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| 277 | } |
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| 278 | |
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| 279 | /*************************************************************************** |
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| 280 | Function : IntUartInterruptHandler |
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| 281 | |
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| 282 | Description : This is the interrupt handler for the internal uart. It |
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| 283 | determines which channel caused the interrupt before queueing any received |
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| 284 | chars and dequeueing chars waiting for transmission. |
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| 285 | ***************************************************************************/ |
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| 286 | static rtems_isr |
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| 287 | IntUartInterruptHandler(rtems_vector_number v) |
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| 288 | { |
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| 289 | unsigned int chan = v - UART_INTC0_IRQ_VECTOR(0); |
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| 290 | struct IntUartInfoStruct *info = &IntUartInfo[chan]; |
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| 291 | |
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| 292 | /* check to see if received data */ |
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| 293 | if ( MCF5282_UART_UISR(chan) & MCF5282_UART_UISR_RXRDY ) |
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| 294 | { |
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| 295 | /* read data and put into the receive buffer */ |
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| 296 | while ( MCF5282_UART_USR(chan) & MCF5282_UART_USR_RXRDY ) |
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| 297 | { |
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| 298 | |
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| 299 | if ( MCF5282_UART_USR(chan) & MCF5282_UART_USR_ERROR ) |
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| 300 | { |
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| 301 | /* clear the error */ |
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| 302 | MCF5282_UART_UCR(chan) = MCF5282_UART_UCR_RESET_ERROR; |
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| 303 | } |
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| 304 | /* put data in rx buffer and check for errors */ |
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| 305 | info->rx_buffer[info->rx_in] = MCF5282_UART_URB(chan); |
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| 306 | |
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| 307 | /* update buffer values */ |
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| 308 | info->rx_in++; |
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| 309 | |
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| 310 | if ( info->rx_in >= RX_BUFFER_SIZE ) |
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| 311 | { |
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| 312 | info->rx_in = 0; |
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| 313 | } |
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| 314 | } |
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| 315 | /* Make sure the port has been opened */ |
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| 316 | if ( info->ttyp ) |
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| 317 | { |
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| 318 | |
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| 319 | /* check to see if task driven */ |
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| 320 | if ( info->iomode == TERMIOS_TASK_DRIVEN ) |
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| 321 | { |
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| 322 | /* notify rx task that rx buffer has data */ |
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| 323 | rtems_termios_rxirq_occured(info->ttyp); |
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| 324 | } |
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| 325 | else |
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| 326 | { |
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| 327 | /* Push up the received data */ |
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| 328 | rtems_termios_enqueue_raw_characters(info->ttyp, info->rx_buffer, info->rx_in); |
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| 329 | info->rx_in = 0; |
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| 330 | } |
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| 331 | } |
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| 332 | } |
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| 333 | |
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| 334 | /* check to see if data needs to be transmitted */ |
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| 335 | if ( ( info->uimr & MCF5282_UART_UIMR_TXRDY ) && |
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| 336 | ( MCF5282_UART_UISR(chan) & MCF5282_UART_UISR_TXRDY ) ) |
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| 337 | { |
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| 338 | |
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| 339 | /* disable tx interrupts */ |
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| 340 | info->uimr &= ~MCF5282_UART_UIMR_TXRDY; |
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| 341 | MCF5282_UART_UIMR(chan) = info->uimr; |
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| 342 | |
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| 343 | /* tell upper level that character has been sent */ |
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| 344 | if ( info->ttyp ) |
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| 345 | rtems_termios_dequeue_characters(info->ttyp, 1); |
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| 346 | } |
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| 347 | } |
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| 348 | |
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| 349 | |
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| 350 | |
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| 351 | /*************************************************************************** |
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| 352 | Function : IntUartInitialize |
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| 353 | |
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| 354 | Description : This initialises the internal uart hardware for all |
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| 355 | internal uarts. If the internal uart is to be interrupt driven then the |
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| 356 | interrupt vectors are hooked. |
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| 357 | ***************************************************************************/ |
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| 358 | static void |
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| 359 | IntUartInitialize(void) |
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| 360 | { |
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| 361 | unsigned int chan; |
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| 362 | struct IntUartInfoStruct *info; |
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| 363 | rtems_isr_entry old_handler; |
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| 364 | int level; |
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| 365 | |
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| 366 | for ( chan = 0; chan < MAX_UART_INFO; chan++ ) |
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| 367 | { |
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| 368 | info = &IntUartInfo[chan]; |
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| 369 | |
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| 370 | info->ttyp = NULL; |
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| 371 | info->rx_in = 0; |
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| 372 | info->rx_out = 0; |
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| 373 | info->baud = -1; |
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| 374 | info->databits = -1; |
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| 375 | info->parity = -1; |
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| 376 | info->stopbits = -1; |
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| 377 | info->hwflow = -1; |
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| 378 | |
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| 379 | MCF5282_UART_UACR(chan) = 0; |
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| 380 | MCF5282_UART_UIMR(chan) = 0; |
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| 381 | if ( info->iomode != TERMIOS_POLLED ) |
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| 382 | { |
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| 383 | rtems_interrupt_catch (IntUartInterruptHandler, |
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| 384 | UART_INTC0_IRQ_VECTOR(chan), |
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| 385 | &old_handler); |
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| 386 | } |
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| 387 | |
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| 388 | /* set uart default values */ |
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| 389 | IntUartSetAttributes(chan, NULL); |
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| 390 | |
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| 391 | /* unmask interrupt */ |
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| 392 | rtems_interrupt_disable(level); |
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| 393 | switch(chan) { |
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| 394 | case 0: |
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| 395 | MCF5282_INTC0_ICR13 = MCF5282_INTC_ICR_IL(UART0_IRQ_LEVEL) | |
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| 396 | MCF5282_INTC_ICR_IP(UART0_IRQ_PRIORITY); |
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| 397 | MCF5282_INTC0_IMRL &= ~(MCF5282_INTC_IMRL_INT13 | |
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| 398 | MCF5282_INTC_IMRL_MASKALL); |
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| 399 | break; |
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| 400 | |
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| 401 | case 1: |
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| 402 | MCF5282_INTC0_ICR14 = MCF5282_INTC_ICR_IL(UART1_IRQ_LEVEL) | |
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| 403 | MCF5282_INTC_ICR_IP(UART1_IRQ_PRIORITY); |
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| 404 | MCF5282_INTC0_IMRL &= ~(MCF5282_INTC_IMRL_INT14 | |
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| 405 | MCF5282_INTC_IMRL_MASKALL); |
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| 406 | break; |
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| 407 | |
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| 408 | case 2: |
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| 409 | MCF5282_INTC0_ICR15 = MCF5282_INTC_ICR_IL(UART2_IRQ_LEVEL) | |
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| 410 | MCF5282_INTC_ICR_IP(UART2_IRQ_PRIORITY); |
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| 411 | MCF5282_INTC0_IMRL &= ~(MCF5282_INTC_IMRL_INT15 | |
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| 412 | MCF5282_INTC_IMRL_MASKALL); |
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| 413 | break; |
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| 414 | } |
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| 415 | rtems_interrupt_enable(level); |
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| 416 | |
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| 417 | } /* of chan loop */ |
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| 418 | |
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| 419 | |
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| 420 | } /* IntUartInitialise */ |
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| 421 | |
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| 422 | |
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| 423 | /*************************************************************************** |
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| 424 | Function : IntUartInterruptWrite |
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| 425 | |
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| 426 | Description : This writes a single character to the appropriate uart |
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| 427 | channel. This is either called during an interrupt or in the user's task |
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| 428 | to initiate a transmit sequence. Calling this routine enables Tx |
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| 429 | interrupts. |
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| 430 | ***************************************************************************/ |
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| 431 | static int |
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| 432 | IntUartInterruptWrite (int minor, const char *buf, int len) |
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| 433 | { |
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| 434 | int level; |
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| 435 | |
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| 436 | rtems_interrupt_disable(level); |
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| 437 | |
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| 438 | /* write out character */ |
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| 439 | MCF5282_UART_UTB(minor) = *buf; |
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| 440 | |
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| 441 | /* enable tx interrupt */ |
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| 442 | IntUartInfo[minor].uimr |= MCF5282_UART_UIMR_TXRDY; |
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| 443 | MCF5282_UART_UIMR(minor) = IntUartInfo[minor].uimr; |
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| 444 | |
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| 445 | rtems_interrupt_enable(level); |
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| 446 | return( 0 ); |
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| 447 | } |
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| 448 | |
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| 449 | /*************************************************************************** |
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| 450 | Function : IntUartInterruptOpen |
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| 451 | |
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| 452 | Description : This enables interrupts when the tty is opened. |
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| 453 | ***************************************************************************/ |
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| 454 | static int |
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| 455 | IntUartInterruptOpen(int major, int minor, void *arg) |
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| 456 | { |
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| 457 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 458 | |
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| 459 | /* enable the uart */ |
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| 460 | MCF5282_UART_UCR(minor) = (MCF5282_UART_UCR_TX_ENABLED | MCF5282_UART_UCR_RX_ENABLED); |
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| 461 | |
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| 462 | /* check to see if interrupts need to be enabled */ |
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| 463 | if ( info->iomode != TERMIOS_POLLED ) |
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| 464 | { |
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| 465 | /* enable rx interrupts */ |
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| 466 | info->uimr |= MCF5282_UART_UIMR_FFULL; |
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| 467 | MCF5282_UART_UIMR(minor) = info->uimr; |
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| 468 | } |
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| 469 | |
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| 470 | /* check to see if doing hardware flow control */ |
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| 471 | if ( info->hwflow ) |
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| 472 | { |
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| 473 | /* assert the RTS line */ |
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| 474 | MCF5282_UART_UOP1(minor) = 1; |
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| 475 | } |
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| 476 | |
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| 477 | return( 0 ); |
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| 478 | } |
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| 479 | |
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| 480 | |
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| 481 | |
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| 482 | /*************************************************************************** |
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| 483 | Function : IntUartInterruptClose |
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| 484 | |
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| 485 | Description : This disables interrupts when the tty is closed. |
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| 486 | ***************************************************************************/ |
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| 487 | static int |
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| 488 | IntUartInterruptClose(int major, int minor, void *arg) |
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| 489 | { |
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| 490 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 491 | |
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| 492 | /* disable the interrupts and the uart */ |
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| 493 | MCF5282_UART_UIMR(minor) = 0; |
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| 494 | MCF5282_UART_UCR(minor) = (MCF5282_UART_UCR_TX_DISABLED | MCF5282_UART_UCR_RX_DISABLED); |
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| 495 | |
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| 496 | /* reset values */ |
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| 497 | info->ttyp = NULL; |
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| 498 | info->uimr = 0; |
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| 499 | info->rx_in = 0; |
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| 500 | info->rx_out = 0; |
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| 501 | |
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| 502 | return( 0 ); |
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| 503 | } |
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| 504 | |
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| 505 | /*************************************************************************** |
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| 506 | Function : IntUartTaskRead |
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| 507 | |
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| 508 | Description : This reads all available characters from the internal uart |
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| 509 | and places them into the termios buffer. The rx interrupts will be |
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| 510 | re-enabled after all data has been read. |
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| 511 | ***************************************************************************/ |
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| 512 | static int |
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| 513 | IntUartTaskRead(int minor) |
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| 514 | { |
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| 515 | char buffer[RX_BUFFER_SIZE]; |
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| 516 | int count; |
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| 517 | int rx_in; |
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| 518 | int index = 0; |
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| 519 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 520 | |
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| 521 | /* determine number of values to copy out */ |
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| 522 | rx_in = info->rx_in; |
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| 523 | if ( info->rx_out <= rx_in ) |
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| 524 | { |
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| 525 | count = rx_in - info->rx_out; |
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| 526 | } |
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| 527 | else |
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| 528 | { |
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| 529 | count = (RX_BUFFER_SIZE - info->rx_out) + rx_in; |
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| 530 | } |
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| 531 | |
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| 532 | /* copy data into local buffer from rx buffer */ |
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| 533 | while ( ( index < count ) && ( index < RX_BUFFER_SIZE ) ) |
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| 534 | { |
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| 535 | /* copy data byte */ |
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| 536 | buffer[index] = info->rx_buffer[info->rx_out]; |
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| 537 | index++; |
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| 538 | |
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| 539 | /* increment rx buffer values */ |
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| 540 | info->rx_out++; |
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| 541 | if ( info->rx_out >= RX_BUFFER_SIZE ) |
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| 542 | { |
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| 543 | info->rx_out = 0; |
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| 544 | } |
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| 545 | } |
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| 546 | |
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| 547 | /* check to see if buffer is not empty */ |
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| 548 | if ( count > 0 ) |
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| 549 | { |
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| 550 | /* set characters into termios buffer */ |
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| 551 | rtems_termios_enqueue_raw_characters(info->ttyp, buffer, count); |
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| 552 | } |
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| 553 | |
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| 554 | return( EOF ); |
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| 555 | } |
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| 556 | |
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| 557 | |
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| 558 | |
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| 559 | /*************************************************************************** |
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| 560 | Function : IntUartPollRead |
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| 561 | |
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| 562 | Description : This reads a character from the internal uart. It returns |
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| 563 | to the caller without blocking if not character is waiting. |
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| 564 | ***************************************************************************/ |
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| 565 | static int |
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| 566 | IntUartPollRead (int minor) |
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| 567 | { |
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| 568 | if ( (MCF5282_UART_USR(minor) & MCF5282_UART_USR_RXRDY) == 0 ) |
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| 569 | return(-1); |
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| 570 | |
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| 571 | return(MCF5282_UART_URB(minor)); |
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| 572 | } |
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| 573 | |
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| 574 | |
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| 575 | /*************************************************************************** |
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| 576 | Function : IntUartPollWrite |
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| 577 | |
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| 578 | Description : This writes out each character in the buffer to the |
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| 579 | appropriate internal uart channel waiting till each one is sucessfully |
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| 580 | transmitted. |
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| 581 | ***************************************************************************/ |
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| 582 | static int |
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| 583 | IntUartPollWrite (int minor, const char *buf, int len) |
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| 584 | { |
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| 585 | /* loop over buffer */ |
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| 586 | while ( len-- ) |
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| 587 | { |
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| 588 | /* block until we can transmit */ |
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| 589 | while ( (MCF5282_UART_USR(minor) & MCF5282_UART_USR_TXRDY) == 0 ) |
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| 590 | continue; |
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| 591 | /* transmit data byte */ |
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| 592 | MCF5282_UART_UTB(minor) = *buf++; |
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| 593 | } |
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| 594 | return(0); |
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| 595 | } |
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| 596 | |
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| 597 | /*************************************************************************** |
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| 598 | Function : console_reserve_resources |
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| 599 | |
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| 600 | Description : This reserves resources consumed by this driver. It passes |
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| 601 | the request on to the termios subsystem. |
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| 602 | ***************************************************************************/ |
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| 603 | void console_reserve_resources( rtems_configuration_table *configuration ) |
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| 604 | { |
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| 605 | rtems_termios_reserve_resources (configuration, 1); |
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| 606 | } |
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| 607 | |
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| 608 | |
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| 609 | /*************************************************************************** |
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| 610 | Function : console_initialize |
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| 611 | |
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| 612 | Description : This initialises termios, both sets of uart hardware before |
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| 613 | registering /dev/tty devices for each channel and the system /dev/console. |
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| 614 | ***************************************************************************/ |
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| 615 | rtems_device_driver console_initialize( |
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| 616 | rtems_device_major_number major, |
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| 617 | rtems_device_minor_number minor, |
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| 618 | void *arg ) |
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| 619 | { |
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| 620 | rtems_status_code status; |
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| 621 | |
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| 622 | |
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| 623 | /* Set up TERMIOS */ |
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| 624 | rtems_termios_initialize (); |
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| 625 | |
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| 626 | /* set io modes for the different channels and initialize device */ |
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| 627 | IntUartInfo[minor].iomode = TERMIOS_IRQ_DRIVEN; |
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| 628 | IntUartInitialize(); |
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| 629 | |
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| 630 | /* Register the console port */ |
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| 631 | status = rtems_io_register_name ("/dev/console", major, CONSOLE_PORT); |
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| 632 | if ( status != RTEMS_SUCCESSFUL ) |
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| 633 | { |
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| 634 | rtems_fatal_error_occurred (status); |
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| 635 | } |
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| 636 | |
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| 637 | /* Register the other port */ |
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| 638 | if ( CONSOLE_PORT != 0 ) |
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| 639 | { |
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| 640 | status = rtems_io_register_name ("/dev/tty00", major, 0); |
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| 641 | if ( status != RTEMS_SUCCESSFUL ) |
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| 642 | { |
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| 643 | rtems_fatal_error_occurred (status); |
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| 644 | } |
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| 645 | } |
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| 646 | if ( CONSOLE_PORT != 1 ) |
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| 647 | { |
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| 648 | status = rtems_io_register_name ("/dev/tty01", major, 1); |
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| 649 | if ( status != RTEMS_SUCCESSFUL ) |
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| 650 | { |
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| 651 | rtems_fatal_error_occurred (status); |
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| 652 | } |
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| 653 | } |
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| 654 | |
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| 655 | return(RTEMS_SUCCESSFUL); |
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| 656 | } |
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| 657 | |
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| 658 | /*************************************************************************** |
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| 659 | Function : console_open |
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| 660 | |
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| 661 | Description : This actually opens the device depending on the minor |
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| 662 | number set during initialisation. The device specific access routines are |
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| 663 | passed to termios when the devices is opened depending on whether it is |
---|
| 664 | polled or not. |
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| 665 | ***************************************************************************/ |
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| 666 | rtems_device_driver console_open( |
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| 667 | rtems_device_major_number major, |
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| 668 | rtems_device_minor_number minor, |
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| 669 | void * arg) |
---|
| 670 | { |
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| 671 | rtems_status_code status = RTEMS_INVALID_NUMBER; |
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| 672 | rtems_libio_open_close_args_t *args = (rtems_libio_open_close_args_t *)arg; |
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| 673 | struct IntUartInfoStruct *info; |
---|
| 674 | |
---|
| 675 | static const rtems_termios_callbacks IntUartPollCallbacks = { |
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| 676 | NULL, /* firstOpen */ |
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| 677 | NULL, /* lastClose */ |
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| 678 | IntUartPollRead, /* pollRead */ |
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| 679 | IntUartPollWrite, /* write */ |
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| 680 | IntUartSetAttributes, /* setAttributes */ |
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| 681 | NULL, /* stopRemoteTx */ |
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| 682 | NULL, /* startRemoteTx */ |
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| 683 | TERMIOS_POLLED /* mode */ |
---|
| 684 | }; |
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| 685 | static const rtems_termios_callbacks IntUartIntrCallbacks = { |
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| 686 | IntUartInterruptOpen, /* firstOpen */ |
---|
| 687 | IntUartInterruptClose, /* lastClose */ |
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| 688 | NULL, /* pollRead */ |
---|
| 689 | IntUartInterruptWrite, /* write */ |
---|
| 690 | IntUartSetAttributes, /* setAttributes */ |
---|
| 691 | NULL, /* stopRemoteTx */ |
---|
| 692 | NULL, /* startRemoteTx */ |
---|
| 693 | TERMIOS_IRQ_DRIVEN /* mode */ |
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| 694 | }; |
---|
| 695 | |
---|
| 696 | static const rtems_termios_callbacks IntUartTaskCallbacks = { |
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| 697 | IntUartInterruptOpen, /* firstOpen */ |
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| 698 | IntUartInterruptClose, /* lastClose */ |
---|
| 699 | IntUartTaskRead, /* pollRead */ |
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| 700 | IntUartInterruptWrite, /* write */ |
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| 701 | IntUartSetAttributes, /* setAttributes */ |
---|
| 702 | NULL, /* stopRemoteTx */ |
---|
| 703 | NULL, /* startRemoteTx */ |
---|
| 704 | TERMIOS_TASK_DRIVEN /* mode */ |
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| 705 | }; |
---|
| 706 | |
---|
| 707 | /* open the port depending on the minor device number */ |
---|
| 708 | if ( ( minor >= 0 ) && ( minor < MAX_UART_INFO ) ) |
---|
| 709 | { |
---|
| 710 | info = &IntUartInfo[minor]; |
---|
| 711 | switch ( info->iomode ) |
---|
| 712 | { |
---|
| 713 | case TERMIOS_POLLED: |
---|
| 714 | status = rtems_termios_open(major, minor, arg, &IntUartPollCallbacks); |
---|
| 715 | break; |
---|
| 716 | case TERMIOS_IRQ_DRIVEN: |
---|
| 717 | status = rtems_termios_open(major, minor, arg, &IntUartIntrCallbacks); |
---|
| 718 | info->ttyp = args->iop->data1; |
---|
| 719 | break; |
---|
| 720 | case TERMIOS_TASK_DRIVEN: |
---|
| 721 | status = rtems_termios_open(major, minor, arg, &IntUartTaskCallbacks); |
---|
| 722 | info->ttyp = args->iop->data1; |
---|
| 723 | break; |
---|
| 724 | } |
---|
| 725 | } |
---|
| 726 | |
---|
| 727 | return( status ); |
---|
| 728 | } |
---|
| 729 | |
---|
| 730 | /*************************************************************************** |
---|
| 731 | Function : console_close |
---|
| 732 | |
---|
| 733 | Description : This closes the device via termios |
---|
| 734 | ***************************************************************************/ |
---|
| 735 | rtems_device_driver console_close( |
---|
| 736 | rtems_device_major_number major, |
---|
| 737 | rtems_device_minor_number minor, |
---|
| 738 | void * arg) |
---|
| 739 | { |
---|
| 740 | return(rtems_termios_close (arg)); |
---|
| 741 | } |
---|
| 742 | |
---|
| 743 | /****************** |
---|
| 744 | ********************************************************* |
---|
| 745 | Function : console_read |
---|
| 746 | |
---|
| 747 | Description : Read from the device via termios |
---|
| 748 | ***************************************************************************/ |
---|
| 749 | rtems_device_driver console_read( |
---|
| 750 | rtems_device_major_number major, |
---|
| 751 | rtems_device_minor_number minor, |
---|
| 752 | void * arg) |
---|
| 753 | { |
---|
| 754 | return(rtems_termios_read (arg)); |
---|
| 755 | } |
---|
| 756 | |
---|
| 757 | /*************************************************************************** |
---|
| 758 | Function : console_write |
---|
| 759 | |
---|
| 760 | Description : Write to the device via termios |
---|
| 761 | ***************************************************************************/ |
---|
| 762 | rtems_device_driver console_write( |
---|
| 763 | rtems_device_major_number major, |
---|
| 764 | rtems_device_minor_number minor, |
---|
| 765 | void * arg) |
---|
| 766 | { |
---|
| 767 | return(rtems_termios_write (arg)); |
---|
| 768 | } |
---|
| 769 | |
---|
| 770 | /*************************************************************************** |
---|
| 771 | Function : console_ioctl |
---|
| 772 | |
---|
| 773 | Description : Pass the IOCtl call to termios |
---|
| 774 | ***************************************************************************/ |
---|
| 775 | rtems_device_driver console_control( |
---|
| 776 | rtems_device_major_number major, |
---|
| 777 | rtems_device_minor_number minor, |
---|
| 778 | void * arg) |
---|
| 779 | { |
---|
| 780 | return( rtems_termios_ioctl (arg) ); |
---|
| 781 | } |
---|
| 782 | int DEBUG_OUTCHAR(int c) |
---|
| 783 | { |
---|
| 784 | if(c == '\n') |
---|
| 785 | DEBUG_OUTCHAR('\r'); |
---|
| 786 | _BSP_null_char(c); |
---|
| 787 | return c; |
---|
| 788 | } |
---|
| 789 | void DEBUG_OUTSTR(const char *msg) |
---|
| 790 | { |
---|
| 791 | while (*msg) |
---|
| 792 | DEBUG_OUTCHAR(*msg++); |
---|
| 793 | } |
---|
| 794 | void DEBUG_OUTNUM(int i) |
---|
| 795 | { |
---|
| 796 | int n; |
---|
| 797 | static const char map[] = "0123456789ABCDEF"; |
---|
| 798 | DEBUG_OUTCHAR(' '); |
---|
| 799 | for (n = 28 ; n >= 0 ; n -= 4) |
---|
| 800 | DEBUG_OUTCHAR(map[(i >> n) & 0xF]); |
---|
| 801 | } |
---|