[69effbb4] | 1 | /*===============================================================*\ |
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| 2 | | Project: RTEMS generic mcf548x BSP | |
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| 3 | +-----------------------------------------------------------------+ |
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| 4 | | File: console.c | |
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| 5 | +-----------------------------------------------------------------+ |
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| 6 | | The file contains the console driver code of generic MCF548x | |
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| 7 | | BSP. | |
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| 8 | +-----------------------------------------------------------------+ |
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| 9 | | Copyright (c) 2007 | |
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| 10 | | Embedded Brains GmbH | |
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| 11 | | Obere Lagerstr. 30 | |
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| 12 | | D-82178 Puchheim | |
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| 13 | | Germany | |
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| 14 | | rtems@embedded-brains.de | |
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| 15 | +-----------------------------------------------------------------+ |
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| 16 | | | |
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| 17 | | Parts of the code has been derived from the "dBUG source code" | |
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| 18 | | package Freescale is providing for M548X EVBs. The usage of | |
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| 19 | | the modified or unmodified code and it's integration into the | |
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| 20 | | generic mcf548x BSP has been done according to the Freescale | |
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| 21 | | license terms. | |
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| 22 | | | |
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| 23 | | The Freescale license terms can be reviewed in the file | |
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| 24 | | | |
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| 25 | | Freescale_license.txt | |
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| 26 | | | |
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| 27 | +-----------------------------------------------------------------+ |
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| 28 | | | |
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| 29 | | The generic mcf548x BSP has been developed on the basic | |
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| 30 | | structures and modules of the av5282 BSP. | |
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| 31 | | | |
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| 32 | +-----------------------------------------------------------------+ |
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| 33 | | | |
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| 34 | | The license and distribution terms for this file may be | |
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| 35 | | found in the file LICENSE in this distribution or at | |
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| 36 | | | |
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[c499856] | 37 | | http://www.rtems.org/license/LICENSE. | |
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[69effbb4] | 38 | | | |
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| 39 | +-----------------------------------------------------------------+ |
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| 40 | | | |
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| 41 | | date history ID | |
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| 42 | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
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| 43 | | 12.11.07 1.0 ras | |
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| 44 | | | |
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| 45 | \*===============================================================*/ |
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| 46 | |
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| 47 | /* |
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| 48 | * Multi UART console serial I/O. |
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| 49 | * |
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| 50 | * TO DO: Add DMA input/output |
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| 51 | */ |
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| 52 | |
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| 53 | #include <stdio.h> |
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| 54 | #include <fcntl.h> |
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| 55 | #include <termios.h> |
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| 56 | #include <malloc.h> |
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| 57 | |
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[21bab83] | 58 | #include <bsp.h> |
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| 59 | #include <bsp/irq-generic.h> |
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| 60 | #include <rtems/libio.h> |
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| 61 | #include <rtems/termiostypes.h> |
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| 62 | #include <rtems/console.h> |
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[69effbb4] | 63 | #include <rtems/bspIo.h> |
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| 64 | |
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| 65 | #define UART_INTC0_IRQ_VECTOR(x) (64+35-(x)) |
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| 66 | |
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| 67 | #define MCF548X_PSC_SR_ERROR ( MCF548X_PSC_SR_RB_NEOF | \ |
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| 68 | MCF548X_PSC_SR_FE_PHYERR | \ |
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| 69 | MCF548X_PSC_SR_PE_CRCERR | \ |
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| 70 | MCF548X_PSC_SR_OE ) |
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| 71 | |
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[39a9f8e] | 72 | static ssize_t IntUartPollWrite(int minor, const char *buf, size_t len); |
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[69effbb4] | 73 | static int IntUartPollRead (int minor); |
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[befae6ab] | 74 | static int IntUartSetAttributes(int minor, const struct termios *t); |
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[69effbb4] | 75 | |
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| 76 | static void |
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[befae6ab] | 77 | psc_output_char( char c ) |
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[69effbb4] | 78 | { |
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[befae6ab] | 79 | rtems_interrupt_level level; |
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[69effbb4] | 80 | |
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| 81 | rtems_interrupt_disable(level); |
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| 82 | while (!((MCF548X_PSC_SR(CONSOLE_PORT) & MCF548X_PSC_SR_TXRDY))) |
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| 83 | continue; |
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| 84 | *((uint8_t *) &MCF548X_PSC_TB(CONSOLE_PORT)) = c; |
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| 85 | while (!((MCF548X_PSC_SR(CONSOLE_PORT) & MCF548X_PSC_SR_TXRDY))) |
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| 86 | continue; |
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| 87 | rtems_interrupt_enable(level); |
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| 88 | } |
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[befae6ab] | 89 | |
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| 90 | static void |
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| 91 | psc_output_char_init(char c) |
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| 92 | { |
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| 93 | IntUartSetAttributes(CONSOLE_PORT, NULL); |
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| 94 | BSP_output_char = psc_output_char; |
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| 95 | psc_output_char(c); |
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| 96 | } |
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| 97 | |
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| 98 | BSP_output_char_function_type BSP_output_char = psc_output_char_init; |
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| 99 | |
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[989938f1] | 100 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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[69effbb4] | 101 | |
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| 102 | #define MAX_UART_INFO 4 |
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| 103 | #define RX_BUFFER_SIZE 248 |
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| 104 | |
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| 105 | struct IntUartInfoStruct |
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| 106 | { |
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| 107 | int iomode; |
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| 108 | volatile int imr; |
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| 109 | int baud; |
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| 110 | int databits; |
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| 111 | int parity; |
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| 112 | int stopbits; |
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| 113 | int hwflow; |
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| 114 | int rx_in; |
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| 115 | int rx_out; |
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| 116 | char rx_buffer[RX_BUFFER_SIZE]; |
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| 117 | void *ttyp; |
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| 118 | }; |
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| 119 | |
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| 120 | struct IntUartInfoStruct IntUartInfo[MAX_UART_INFO]; |
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| 121 | |
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| 122 | static int GetBaud( int baudHandle ) |
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| 123 | { |
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[a9d0c6ec] | 124 | int baud = BSP_CONSOLE_BAUD; |
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[69effbb4] | 125 | switch(baudHandle) |
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| 126 | { |
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| 127 | case B0: |
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| 128 | baud = (int)0; |
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| 129 | break; |
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| 130 | case B1200: |
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| 131 | baud = (int)1200; |
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| 132 | break; |
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| 133 | case B2400: |
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| 134 | baud = (int)2400; |
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| 135 | break; |
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| 136 | case B4800: |
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| 137 | baud = (int)4800; |
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| 138 | break; |
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| 139 | case B9600: |
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| 140 | baud = (int)9600; |
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| 141 | break; |
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| 142 | case B19200: |
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| 143 | baud = (int)19200; |
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| 144 | break; |
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| 145 | case B38400: |
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| 146 | baud = (int)38400; |
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| 147 | break; |
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| 148 | case B57600: |
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| 149 | baud = (int)57600; |
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| 150 | break; |
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| 151 | case B115200: |
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| 152 | baud = (int)115200; |
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| 153 | break; |
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| 154 | } |
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| 155 | return baud; |
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| 156 | } |
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| 157 | |
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| 158 | /*************************************************************************** |
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| 159 | Function : IntUartSet |
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| 160 | |
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| 161 | Description : This updates the hardware UART settings. |
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| 162 | ***************************************************************************/ |
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| 163 | static void |
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| 164 | IntUartSet(int minor, int baud, int databits, int parity, int stopbits, int hwflow) |
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| 165 | { |
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| 166 | uint8_t psc_mode_1 = 0, psc_mode_2 = 0; |
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| 167 | uint16_t divider; |
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| 168 | int level; |
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| 169 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 170 | |
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| 171 | rtems_interrupt_disable(level); |
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| 172 | |
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| 173 | /* disable interrupts, clear RTS line, and disable the UARTS */ |
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| 174 | /* Mask all psc interrupts */ |
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| 175 | MCF548X_PSC_IMR(minor) = 0x0000; |
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| 176 | |
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| 177 | /* Clear RTS to send */ |
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| 178 | MCF548X_PSC_OPSET(minor) &= ~(MCF548X_PSC_OPSET_RTS); |
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| 179 | |
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| 180 | /* Disable receiver and transmitter */ |
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| 181 | MCF548X_PSC_CR(minor) &= ~(MCF548X_PSC_CR_RX_ENABLED | MCF548X_PSC_CR_TX_ENABLED); |
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| 182 | |
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| 183 | /* provide gpio settings */ |
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| 184 | switch (minor) |
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| 185 | { |
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| 186 | case 0: |
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| 187 | MCF548X_GPIO_PAR_PSC0 = (0 | MCF548X_GPIO_PAR_PSC0_PAR_TXD0 | MCF548X_GPIO_PAR_PSC0_PAR_RXD0); |
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| 188 | |
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| 189 | if(hwflow) |
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| 190 | { |
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| 191 | MCF548X_GPIO_PAR_PSC0 |= (0 | MCF548X_GPIO_PAR_PSC0_PAR_CTS0_CTS | MCF548X_GPIO_PAR_PSC0_PAR_RTS0_RTS); |
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| 192 | } |
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| 193 | break; |
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| 194 | case 1: |
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| 195 | MCF548X_GPIO_PAR_PSC1 = (0 | MCF548X_GPIO_PAR_PSC1_PAR_TXD1 | MCF548X_GPIO_PAR_PSC1_PAR_RXD1); |
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| 196 | |
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| 197 | if(hwflow) |
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| 198 | { |
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| 199 | MCF548X_GPIO_PAR_PSC1 |= (0 | MCF548X_GPIO_PAR_PSC1_PAR_CTS1_CTS | MCF548X_GPIO_PAR_PSC1_PAR_RTS1_RTS); |
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| 200 | } |
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| 201 | break; |
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| 202 | case 2: |
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| 203 | MCF548X_GPIO_PAR_PSC2 = (0 | MCF548X_GPIO_PAR_PSC2_PAR_TXD2 | MCF548X_GPIO_PAR_PSC2_PAR_RXD2); |
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| 204 | |
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| 205 | if(hwflow) |
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| 206 | { |
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| 207 | MCF548X_GPIO_PAR_PSC2 |= (0 | MCF548X_GPIO_PAR_PSC2_PAR_CTS2_CTS | MCF548X_GPIO_PAR_PSC2_PAR_RTS2_RTS); |
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| 208 | } |
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| 209 | break; |
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| 210 | case 3: |
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| 211 | MCF548X_GPIO_PAR_PSC3 = (0 | MCF548X_GPIO_PAR_PSC3_PAR_TXD3 | MCF548X_GPIO_PAR_PSC3_PAR_RXD3); |
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| 212 | |
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| 213 | if(hwflow) |
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| 214 | { |
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| 215 | MCF548X_GPIO_PAR_PSC3 |= (0 | MCF548X_GPIO_PAR_PSC3_PAR_CTS3_CTS | MCF548X_GPIO_PAR_PSC3_PAR_RTS3_RTS); |
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| 216 | } |
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| 217 | break; |
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| 218 | default: |
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| 219 | break; |
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| 220 | } |
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| 221 | |
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| 222 | /* save the current values */ |
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| 223 | info->imr = 0; |
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| 224 | info->baud = baud; |
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| 225 | info->databits = databits; |
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| 226 | info->parity = parity; |
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| 227 | info->stopbits = stopbits; |
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| 228 | info->hwflow = hwflow; |
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| 229 | |
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| 230 | /* Put PSC in UART mode */ |
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| 231 | MCF548X_PSC_SICR(minor) = MCF548X_PSC_SICR_SIM_UART; |
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| 232 | |
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| 233 | /* set the baud rate values */ |
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| 234 | MCF548X_PSC_CSR(minor) = (0 | MCF548X_PSC_CSR_RCSEL_SYS_CLK | MCF548X_PSC_CSR_TCSEL_SYS_CLK); |
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| 235 | |
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| 236 | /* Calculate baud settings */ |
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| 237 | divider = (uint16_t)((get_CPU_clock_speed())/(baud * 32)); |
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| 238 | MCF548X_PSC_CTUR(minor) = (uint8_t) ((divider >> 8) & 0xFF); |
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| 239 | MCF548X_PSC_CTLR(minor) = (uint8_t) (divider & 0xFF); |
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| 240 | |
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| 241 | /* Reset transmitter, receiver, mode register, and error conditions */ |
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| 242 | MCF548X_PSC_CR(minor) = MCF548X_PSC_CR_RESET_RX; |
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| 243 | MCF548X_PSC_CR(minor) = MCF548X_PSC_CR_RESET_TX; |
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| 244 | MCF548X_PSC_CR(minor) = MCF548X_PSC_CR_RESET_ERROR; |
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| 245 | MCF548X_PSC_CR(minor) = MCF548X_PSC_CR_BKCHGINT; |
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| 246 | MCF548X_PSC_CR(minor) = MCF548X_PSC_CR_RESET_MR; |
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| 247 | |
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| 248 | /* check to see if doing hardware flow control */ |
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| 249 | if ( hwflow ) |
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| 250 | { |
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| 251 | /* set hardware flow options */ |
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| 252 | psc_mode_1 = MCF548X_PSC_MR_RXRTS; |
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| 253 | psc_mode_2 = MCF548X_PSC_MR_TXCTS; |
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| 254 | } |
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| 255 | |
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| 256 | /* set mode registers */ |
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| 257 | psc_mode_1 |= (uint8_t)(parity | databits); |
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| 258 | psc_mode_2 |= (uint8_t)(stopbits); |
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| 259 | |
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| 260 | /* set mode registers */ |
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| 261 | MCF548X_PSC_MR(minor) = psc_mode_1; |
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| 262 | MCF548X_PSC_MR(minor) = psc_mode_2; |
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| 263 | |
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| 264 | /* Setup FIFO Alarms */ |
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| 265 | MCF548X_PSC_RFAR(minor) = MCF548X_PSC_RFAR_ALARM(248); |
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| 266 | MCF548X_PSC_TFAR(minor) = MCF548X_PSC_TFAR_ALARM(248); |
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| 267 | |
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| 268 | /* check to see if interrupts need to be enabled */ |
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| 269 | if ( info->iomode != TERMIOS_POLLED ) |
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| 270 | { |
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| 271 | /* enable rx interrupts */ |
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| 272 | info->imr |= MCF548X_PSC_IMR_RXRDY_FU; |
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| 273 | MCF548X_PSC_IMR(minor) = info->imr; |
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| 274 | } |
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| 275 | |
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| 276 | /* check to see if doing hardware flow control */ |
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| 277 | if ( hwflow ) |
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| 278 | { |
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| 279 | /* assert the RTS line */ |
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| 280 | MCF548X_PSC_OPSET(minor) = MCF548X_PSC_OPSET_RTS; |
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| 281 | } |
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| 282 | |
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| 283 | rtems_interrupt_enable(level); |
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| 284 | |
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| 285 | /* Enable receiver and transmitter */ |
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| 286 | MCF548X_PSC_CR(minor) =(0 | MCF548X_PSC_CR_RX_ENABLED | MCF548X_PSC_CR_TX_ENABLED); |
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| 287 | |
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| 288 | |
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| 289 | } |
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| 290 | |
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| 291 | /*************************************************************************** |
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| 292 | Function : IntUartSetAttributes |
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| 293 | |
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| 294 | Description : This provides the hardware-dependent portion of tcsetattr(). |
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| 295 | value and sets it. At the moment this just sets the baud rate. |
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| 296 | |
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| 297 | Note: The highest baudrate is 115200 as this stays within |
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| 298 | an error of +/- 5% at 25MHz processor clock |
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| 299 | ***************************************************************************/ |
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| 300 | static int |
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| 301 | IntUartSetAttributes(int minor, const struct termios *t) |
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| 302 | { |
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| 303 | /* set default index values */ |
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[5ea4e63] | 304 | #ifdef HAS_DBUG |
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| 305 | int baud = DBUG_SETTINGS.console_baudrate; |
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| 306 | #else |
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[a9d0c6ec] | 307 | int baud = (int)BSP_CONSOLE_BAUD; |
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[5ea4e63] | 308 | #endif |
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[69effbb4] | 309 | int databits = (int)MCF548X_PSC_MR_BC_8; |
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| 310 | int parity = (int)MCF548X_PSC_MR_PM_NONE; |
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| 311 | int stopbits = (int)MCF548X_PSC_MR_SB_STOP_BITS_1; |
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| 312 | int hwflow = (int)1; |
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| 313 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 314 | |
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| 315 | /* check to see if input is valid */ |
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| 316 | if ( t != (const struct termios *)0 ) |
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| 317 | { |
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| 318 | /* determine baud rate index */ |
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[1c6926c1] | 319 | baud = GetBaud( t->c_ospeed ); |
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[69effbb4] | 320 | |
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| 321 | /* determine data bits */ |
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| 322 | switch ( t->c_cflag & CSIZE ) |
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| 323 | { |
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| 324 | case CS5: |
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| 325 | databits = (int)MCF548X_PSC_MR_BC_5; |
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| 326 | break; |
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| 327 | case CS6: |
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| 328 | databits = (int)MCF548X_PSC_MR_BC_6; |
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| 329 | break; |
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| 330 | case CS7: |
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| 331 | databits = (int)MCF548X_PSC_MR_BC_7; |
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| 332 | break; |
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| 333 | case CS8: |
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| 334 | databits = (int)MCF548X_PSC_MR_BC_8; |
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| 335 | break; |
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| 336 | } |
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| 337 | |
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| 338 | /* determine if parity is enabled */ |
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| 339 | if ( t->c_cflag & PARENB ) |
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| 340 | { |
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| 341 | if ( t->c_cflag & PARODD ) |
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| 342 | { |
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| 343 | /* odd parity */ |
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| 344 | parity = (int)MCF548X_PSC_MR_PM_ODD; |
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| 345 | } |
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| 346 | else |
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| 347 | { |
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| 348 | /* even parity */ |
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| 349 | parity = (int)MCF548X_PSC_MR_PM_EVEN; |
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| 350 | } |
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| 351 | } |
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| 352 | |
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| 353 | /* determine stop bits */ |
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| 354 | if ( t->c_cflag & CSTOPB ) |
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| 355 | { |
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| 356 | /* two stop bits */ |
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| 357 | stopbits = (int)MCF548X_PSC_MR_SB_STOP_BITS_2; |
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| 358 | } |
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| 359 | |
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| 360 | /* check to see if hardware flow control */ |
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| 361 | if ( t->c_cflag & CRTSCTS ) |
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| 362 | { |
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| 363 | hwflow = 1; |
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| 364 | } |
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| 365 | } |
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| 366 | |
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| 367 | /* check to see if values have changed */ |
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| 368 | if ( ( baud != info->baud ) || |
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| 369 | ( databits != info->databits ) || |
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| 370 | ( parity != info->parity ) || |
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| 371 | ( stopbits != info->stopbits ) || |
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| 372 | ( hwflow != info->hwflow ) ) |
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| 373 | { |
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| 374 | |
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| 375 | /* call function to set values */ |
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| 376 | IntUartSet(minor, baud, databits, parity, stopbits, hwflow); |
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| 377 | } |
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| 378 | |
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| 379 | return RTEMS_SUCCESSFUL; |
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| 380 | |
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| 381 | } |
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| 382 | |
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| 383 | /*************************************************************************** |
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| 384 | Function : IntUartInterruptHandler |
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| 385 | |
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| 386 | Description : This is the interrupt handler for the internal uart. It |
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| 387 | determines which channel caused the interrupt before queueing any received |
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| 388 | chars and dequeueing chars waiting for transmission. |
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| 389 | ***************************************************************************/ |
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| 390 | static rtems_isr |
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| 391 | IntUartInterruptHandler(rtems_vector_number v) |
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| 392 | { |
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| 393 | unsigned int chan = v - UART_INTC0_IRQ_VECTOR(0); |
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| 394 | struct IntUartInfoStruct *info = &IntUartInfo[chan]; |
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| 395 | |
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| 396 | /* check to see if received data */ |
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| 397 | if ( MCF548X_PSC_ISR(chan) & MCF548X_PSC_ISR_RXRDY_FU ) |
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| 398 | { |
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| 399 | /* read data and put into the receive buffer */ |
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| 400 | while ( MCF548X_PSC_SR(chan) & MCF548X_PSC_SR_RXRDY ) |
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| 401 | { |
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| 402 | |
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| 403 | /* put data in rx buffer */ |
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[5ea4e63] | 404 | info->rx_buffer[info->rx_in] = *((volatile uint8_t *)&MCF548X_PSC_RB(chan)); |
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[69effbb4] | 405 | |
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| 406 | /* check for errors */ |
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| 407 | if ( MCF548X_PSC_SR(chan) & MCF548X_PSC_SR_ERROR ) |
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| 408 | { |
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| 409 | /* clear the error */ |
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| 410 | MCF548X_PSC_CR(chan) = MCF548X_PSC_CR_RESET_ERROR; |
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| 411 | } |
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| 412 | |
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| 413 | /* update buffer values */ |
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| 414 | info->rx_in++; |
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| 415 | |
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| 416 | if ( info->rx_in >= RX_BUFFER_SIZE ) |
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| 417 | { |
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| 418 | info->rx_in = 0; |
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| 419 | } |
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| 420 | } |
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| 421 | /* Make sure the port has been opened */ |
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| 422 | if ( info->ttyp ) |
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| 423 | { |
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| 424 | |
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| 425 | /* check to see if task driven */ |
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| 426 | if ( info->iomode == TERMIOS_TASK_DRIVEN ) |
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| 427 | { |
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| 428 | /* notify rx task that rx buffer has data */ |
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| 429 | rtems_termios_rxirq_occured(info->ttyp); |
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| 430 | } |
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| 431 | else |
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| 432 | { |
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| 433 | /* Push up the received data */ |
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| 434 | rtems_termios_enqueue_raw_characters(info->ttyp, info->rx_buffer, info->rx_in); |
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| 435 | info->rx_in = 0; |
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| 436 | } |
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| 437 | } |
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| 438 | } |
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| 439 | |
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| 440 | /* check to see if data needs to be transmitted */ |
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| 441 | if ( ( info->imr & MCF548X_PSC_IMR_TXRDY ) && |
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| 442 | ( MCF548X_PSC_ISR(chan) & MCF548X_PSC_ISR_TXRDY ) ) |
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| 443 | { |
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| 444 | |
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| 445 | /* disable tx interrupts */ |
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| 446 | info->imr &= ~MCF548X_PSC_IMR_TXRDY; |
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| 447 | MCF548X_PSC_IMR(chan) = info->imr; |
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| 448 | |
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| 449 | /* tell upper level that character has been sent */ |
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| 450 | if ( info->ttyp ) |
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| 451 | rtems_termios_dequeue_characters(info->ttyp, 1); |
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| 452 | } |
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| 453 | |
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| 454 | } |
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| 455 | |
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| 456 | /*************************************************************************** |
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| 457 | Function : IntUartInitialize |
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| 458 | |
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| 459 | Description : This initialises the internal uart hardware for all |
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| 460 | internal uarts. If the internal uart is to be interrupt driven then the |
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| 461 | interrupt vectors are hooked. |
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| 462 | ***************************************************************************/ |
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| 463 | static void |
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| 464 | IntUartInitialize(void) |
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| 465 | { |
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| 466 | unsigned int chan; |
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| 467 | struct IntUartInfoStruct *info; |
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| 468 | rtems_isr_entry old_handler; |
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| 469 | |
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| 470 | for ( chan = 0; chan < MAX_UART_INFO; chan++ ) |
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| 471 | { |
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| 472 | info = &IntUartInfo[chan]; |
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| 473 | |
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| 474 | info->ttyp = NULL; |
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| 475 | info->rx_in = 0; |
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| 476 | info->rx_out = 0; |
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| 477 | info->baud = -1; |
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| 478 | info->databits = -1; |
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| 479 | info->parity = -1; |
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| 480 | info->stopbits = -1; |
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| 481 | info->hwflow = -1; |
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| 482 | |
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| 483 | MCF548X_PSC_ACR(chan) = 0; |
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| 484 | MCF548X_PSC_IMR(chan) = 0; |
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| 485 | if ( info->iomode != TERMIOS_POLLED ) |
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| 486 | { |
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| 487 | rtems_interrupt_catch (IntUartInterruptHandler, |
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| 488 | UART_INTC0_IRQ_VECTOR(chan), |
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| 489 | &old_handler); |
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| 490 | } |
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| 491 | |
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| 492 | /* set uart default values */ |
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| 493 | IntUartSetAttributes(chan, NULL); |
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| 494 | |
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[6eb1733] | 495 | /* unmask interrupt */ |
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| 496 | bsp_interrupt_vector_enable(MCF548X_IRQ_PSC(chan)); |
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[69effbb4] | 497 | } /* of chan loop */ |
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| 498 | |
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[befae6ab] | 499 | BSP_output_char = psc_output_char; |
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[69effbb4] | 500 | } /* IntUartInitialise */ |
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| 501 | |
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| 502 | /*************************************************************************** |
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| 503 | Function : IntUartInterruptWrite |
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| 504 | |
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| 505 | Description : This writes a single character to the appropriate uart |
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| 506 | channel. This is either called during an interrupt or in the user's task |
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| 507 | to initiate a transmit sequence. Calling this routine enables Tx |
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| 508 | interrupts. |
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| 509 | ***************************************************************************/ |
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[39a9f8e] | 510 | static ssize_t |
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| 511 | IntUartInterruptWrite (int minor, const char *buf, size_t len) |
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[69effbb4] | 512 | { |
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[e18db9f] | 513 | if (len > 0) { |
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| 514 | /* write out character */ |
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| 515 | *(volatile uint8_t *)(&MCF548X_PSC_TB(minor)) = *buf; |
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[69effbb4] | 516 | |
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[e18db9f] | 517 | /* enable tx interrupt */ |
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| 518 | IntUartInfo[minor].imr |= MCF548X_PSC_IMR_TXRDY; |
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| 519 | MCF548X_PSC_IMR(minor) = IntUartInfo[minor].imr; |
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| 520 | } |
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[69effbb4] | 521 | |
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| 522 | return 0; |
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| 523 | } |
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| 524 | |
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| 525 | /*************************************************************************** |
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| 526 | Function : IntUartInterruptOpen |
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| 527 | |
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| 528 | Description : This enables interrupts when the tty is opened. |
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| 529 | ***************************************************************************/ |
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| 530 | static int |
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| 531 | IntUartInterruptOpen(int major, int minor, void *arg) |
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| 532 | { |
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| 533 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 534 | |
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| 535 | /* enable the uart */ |
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| 536 | MCF548X_PSC_CR(minor) = (MCF548X_PSC_CR_TX_ENABLED | MCF548X_PSC_CR_RX_ENABLED); |
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| 537 | |
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| 538 | /* check to see if interrupts need to be enabled */ |
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| 539 | if ( info->iomode != TERMIOS_POLLED ) |
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| 540 | { |
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| 541 | /* enable rx interrupts */ |
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| 542 | info->imr |= MCF548X_PSC_IMR_RXRDY_FU; |
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| 543 | MCF548X_PSC_IMR(minor) = info->imr; |
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| 544 | } |
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| 545 | |
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| 546 | /* check to see if doing hardware flow control */ |
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| 547 | if ( info->hwflow ) |
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| 548 | { |
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| 549 | /* assert the RTS line */ |
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| 550 | MCF548X_PSC_OPSET(minor) = MCF548X_PSC_OPSET_RTS; |
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| 551 | } |
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| 552 | |
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| 553 | return 0; |
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| 554 | } |
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| 555 | |
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| 556 | |
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| 557 | /*************************************************************************** |
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| 558 | Function : IntUartInterruptClose |
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| 559 | |
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| 560 | Description : This disables interrupts when the tty is closed. |
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| 561 | ***************************************************************************/ |
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| 562 | static int |
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| 563 | IntUartInterruptClose(int major, int minor, void *arg) |
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| 564 | { |
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| 565 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 566 | |
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| 567 | /* disable the interrupts and the uart */ |
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| 568 | MCF548X_PSC_IMR(minor) = 0; |
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| 569 | MCF548X_PSC_CR(minor) = (MCF548X_PSC_CR_TX_ENABLED | MCF548X_PSC_CR_RX_ENABLED); |
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| 570 | |
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| 571 | /* reset values */ |
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| 572 | info->ttyp = NULL; |
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| 573 | info->imr = 0; |
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| 574 | info->rx_in = 0; |
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| 575 | info->rx_out = 0; |
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| 576 | |
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| 577 | return 0; |
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| 578 | } |
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| 579 | |
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| 580 | /*************************************************************************** |
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| 581 | Function : IntUartTaskRead |
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| 582 | |
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| 583 | Description : This reads all available characters from the internal uart |
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| 584 | and places them into the termios buffer. The rx interrupts will be |
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| 585 | re-enabled after all data has been read. |
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| 586 | ***************************************************************************/ |
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| 587 | static int |
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| 588 | IntUartTaskRead(int minor) |
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| 589 | { |
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| 590 | char buffer[RX_BUFFER_SIZE]; |
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| 591 | int count; |
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| 592 | int rx_in; |
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| 593 | int index = 0; |
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| 594 | struct IntUartInfoStruct *info = &IntUartInfo[minor]; |
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| 595 | |
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| 596 | /* determine number of values to copy out */ |
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| 597 | rx_in = info->rx_in; |
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| 598 | if ( info->rx_out <= rx_in ) |
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| 599 | { |
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| 600 | count = rx_in - info->rx_out; |
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| 601 | } |
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| 602 | else |
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| 603 | { |
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| 604 | count = (RX_BUFFER_SIZE - info->rx_out) + rx_in; |
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| 605 | } |
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| 606 | |
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| 607 | /* copy data into local buffer from rx buffer */ |
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| 608 | while ( ( index < count ) && ( index < RX_BUFFER_SIZE ) ) |
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| 609 | { |
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| 610 | /* copy data byte */ |
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| 611 | buffer[index] = info->rx_buffer[info->rx_out]; |
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| 612 | index++; |
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| 613 | |
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| 614 | /* increment rx buffer values */ |
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| 615 | info->rx_out++; |
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| 616 | if ( info->rx_out >= RX_BUFFER_SIZE ) |
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| 617 | { |
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| 618 | info->rx_out = 0; |
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| 619 | } |
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| 620 | } |
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| 621 | |
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| 622 | /* check to see if buffer is not empty */ |
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| 623 | if ( count > 0 ) |
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| 624 | { |
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| 625 | /* set characters into termios buffer */ |
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| 626 | rtems_termios_enqueue_raw_characters(info->ttyp, buffer, count); |
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| 627 | } |
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| 628 | |
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| 629 | return EOF; |
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| 630 | } |
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| 631 | |
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| 632 | |
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| 633 | /*************************************************************************** |
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| 634 | Function : IntUartPollRead |
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| 635 | |
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| 636 | Description : This reads a character from the internal uart. It returns |
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| 637 | to the caller without blocking if not character is waiting. |
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| 638 | ***************************************************************************/ |
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| 639 | static int |
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| 640 | IntUartPollRead (int minor) |
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| 641 | { |
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| 642 | if (!((MCF548X_PSC_SR(minor) & MCF548X_PSC_SR_RXRDY))) |
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| 643 | return(-1); |
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| 644 | |
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| 645 | return *((uint8_t *)&MCF548X_PSC_RB(minor)); |
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| 646 | } |
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| 647 | |
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| 648 | |
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| 649 | /*************************************************************************** |
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| 650 | Function : IntUartPollWrite |
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| 651 | |
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| 652 | Description : This writes out each character in the buffer to the |
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| 653 | appropriate internal uart channel waiting till each one is sucessfully |
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| 654 | transmitted. |
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| 655 | ***************************************************************************/ |
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[39a9f8e] | 656 | static ssize_t |
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| 657 | IntUartPollWrite (int minor, const char *buf, size_t len) |
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[69effbb4] | 658 | { |
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[39a9f8e] | 659 | size_t retval = len; |
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[69effbb4] | 660 | /* loop over buffer */ |
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| 661 | while ( len-- ) |
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| 662 | { |
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| 663 | /* block until we can transmit */ |
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| 664 | while (!((MCF548X_PSC_SR(minor) & MCF548X_PSC_SR_TXRDY))) |
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| 665 | continue; |
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| 666 | /* transmit data byte */ |
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| 667 | *((uint8_t *)&MCF548X_PSC_TB(minor)) = *buf++; |
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| 668 | } |
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[39a9f8e] | 669 | return retval; |
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[69effbb4] | 670 | } |
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| 671 | |
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| 672 | /*************************************************************************** |
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| 673 | Function : console_initialize |
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| 674 | |
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| 675 | Description : This initialises termios, both sets of uart hardware before |
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| 676 | registering /dev/tty devices for each channel and the system /dev/console. |
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| 677 | ***************************************************************************/ |
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| 678 | rtems_device_driver console_initialize( |
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| 679 | rtems_device_major_number major, |
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| 680 | rtems_device_minor_number minor, |
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| 681 | void *arg ) |
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| 682 | { |
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| 683 | rtems_status_code status; |
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| 684 | |
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| 685 | |
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| 686 | /* Set up TERMIOS */ |
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| 687 | rtems_termios_initialize (); |
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| 688 | |
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| 689 | /* set io modes for the different channels and initialize device */ |
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| 690 | IntUartInfo[minor].iomode = TERMIOS_IRQ_DRIVEN; //TERMIOS_POLLED; |
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| 691 | IntUartInitialize(); |
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| 692 | |
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| 693 | /* Register the console port */ |
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| 694 | status = rtems_io_register_name ("/dev/console", major, CONSOLE_PORT); |
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| 695 | if ( status != RTEMS_SUCCESSFUL ) |
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| 696 | { |
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| 697 | rtems_fatal_error_occurred (status); |
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| 698 | } |
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| 699 | |
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| 700 | /* Register the other port */ |
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| 701 | if ( CONSOLE_PORT != 0 ) |
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| 702 | { |
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| 703 | status = rtems_io_register_name ("/dev/tty00", major, 0); |
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| 704 | if ( status != RTEMS_SUCCESSFUL ) |
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| 705 | { |
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| 706 | rtems_fatal_error_occurred (status); |
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| 707 | } |
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| 708 | } |
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| 709 | if ( CONSOLE_PORT != 1 ) |
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| 710 | { |
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| 711 | status = rtems_io_register_name ("/dev/tty01", major, 1); |
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| 712 | if ( status != RTEMS_SUCCESSFUL ) |
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| 713 | { |
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| 714 | rtems_fatal_error_occurred (status); |
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| 715 | } |
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| 716 | } |
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| 717 | |
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| 718 | return(RTEMS_SUCCESSFUL); |
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| 719 | } |
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| 720 | |
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| 721 | /*************************************************************************** |
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| 722 | Function : console_open |
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| 723 | |
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| 724 | Description : This actually opens the device depending on the minor |
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| 725 | number set during initialisation. The device specific access routines are |
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| 726 | passed to termios when the devices is opened depending on whether it is |
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| 727 | polled or not. |
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| 728 | ***************************************************************************/ |
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| 729 | rtems_device_driver console_open( |
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| 730 | rtems_device_major_number major, |
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| 731 | rtems_device_minor_number minor, |
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| 732 | void * arg) |
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| 733 | { |
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| 734 | rtems_status_code status = RTEMS_INVALID_NUMBER; |
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| 735 | rtems_libio_open_close_args_t *args = (rtems_libio_open_close_args_t *)arg; |
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| 736 | struct IntUartInfoStruct *info; |
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| 737 | |
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| 738 | static const rtems_termios_callbacks IntUartPollCallbacks = { |
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| 739 | NULL, /* firstOpen */ |
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| 740 | NULL, /* lastClose */ |
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| 741 | IntUartPollRead, /* pollRead */ |
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| 742 | IntUartPollWrite, /* write */ |
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| 743 | IntUartSetAttributes, /* setAttributes */ |
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| 744 | NULL, /* stopRemoteTx */ |
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| 745 | NULL, /* startRemoteTx */ |
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| 746 | TERMIOS_POLLED /* mode */ |
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| 747 | }; |
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| 748 | static const rtems_termios_callbacks IntUartIntrCallbacks = { |
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| 749 | IntUartInterruptOpen, /* firstOpen */ |
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| 750 | IntUartInterruptClose, /* lastClose */ |
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| 751 | NULL, /* pollRead */ |
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| 752 | IntUartInterruptWrite, /* write */ |
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| 753 | IntUartSetAttributes, /* setAttributes */ |
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| 754 | NULL, /* stopRemoteTx */ |
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| 755 | NULL, /* startRemoteTx */ |
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| 756 | TERMIOS_IRQ_DRIVEN /* mode */ |
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| 757 | }; |
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| 758 | |
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| 759 | static const rtems_termios_callbacks IntUartTaskCallbacks = { |
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| 760 | IntUartInterruptOpen, /* firstOpen */ |
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| 761 | IntUartInterruptClose, /* lastClose */ |
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| 762 | IntUartTaskRead, /* pollRead */ |
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| 763 | IntUartInterruptWrite, /* write */ |
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| 764 | IntUartSetAttributes, /* setAttributes */ |
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| 765 | NULL, /* stopRemoteTx */ |
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| 766 | NULL, /* startRemoteTx */ |
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| 767 | TERMIOS_TASK_DRIVEN /* mode */ |
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| 768 | }; |
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| 769 | |
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| 770 | /* open the port depending on the minor device number */ |
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| 771 | if ( ( minor >= 0 ) && ( minor < MAX_UART_INFO ) ) |
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| 772 | { |
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| 773 | info = &IntUartInfo[minor]; |
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| 774 | switch ( info->iomode ) |
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| 775 | { |
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| 776 | case TERMIOS_POLLED: |
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| 777 | status = rtems_termios_open(major, minor, arg, &IntUartPollCallbacks); |
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| 778 | break; |
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| 779 | case TERMIOS_IRQ_DRIVEN: |
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| 780 | status = rtems_termios_open(major, minor, arg, &IntUartIntrCallbacks); |
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| 781 | info->ttyp = args->iop->data1; |
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| 782 | break; |
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| 783 | case TERMIOS_TASK_DRIVEN: |
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| 784 | status = rtems_termios_open(major, minor, arg, &IntUartTaskCallbacks); |
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| 785 | info->ttyp = args->iop->data1; |
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| 786 | break; |
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| 787 | } |
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| 788 | } |
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| 789 | |
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| 790 | return( status ); |
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| 791 | } |
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| 792 | |
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| 793 | /*************************************************************************** |
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| 794 | Function : console_close |
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| 795 | |
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| 796 | Description : This closes the device via termios |
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| 797 | ***************************************************************************/ |
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| 798 | rtems_device_driver console_close( |
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| 799 | rtems_device_major_number major, |
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| 800 | rtems_device_minor_number minor, |
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| 801 | void * arg) |
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| 802 | { |
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| 803 | return(rtems_termios_close (arg)); |
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| 804 | } |
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| 805 | |
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| 806 | /*************************************************************************** |
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| 807 | Function : console_read |
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| 808 | |
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| 809 | Description : Read from the device via termios |
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| 810 | ***************************************************************************/ |
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| 811 | rtems_device_driver console_read( |
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| 812 | rtems_device_major_number major, |
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| 813 | rtems_device_minor_number minor, |
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| 814 | void * arg) |
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| 815 | { |
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| 816 | return(rtems_termios_read (arg)); |
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| 817 | } |
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| 818 | |
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| 819 | /*************************************************************************** |
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| 820 | Function : console_write |
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| 821 | |
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| 822 | Description : Write to the device via termios |
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| 823 | ***************************************************************************/ |
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| 824 | rtems_device_driver console_write( |
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| 825 | rtems_device_major_number major, |
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| 826 | rtems_device_minor_number minor, |
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| 827 | void * arg) |
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| 828 | { |
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| 829 | return(rtems_termios_write (arg)); |
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| 830 | } |
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| 831 | |
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| 832 | /*************************************************************************** |
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| 833 | Function : console_ioctl |
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| 834 | |
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| 835 | Description : Pass the IOCtl call to termios |
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| 836 | ***************************************************************************/ |
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| 837 | rtems_device_driver console_control( |
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| 838 | rtems_device_major_number major, |
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| 839 | rtems_device_minor_number minor, |
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| 840 | void * arg) |
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| 841 | { |
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| 842 | return( rtems_termios_ioctl (arg) ); |
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| 843 | } |
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