1 | /* |
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2 | * This file contains the TTY driver for the serial ports on the LEON. |
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3 | * |
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4 | * This driver uses the termios pseudo driver. |
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5 | * |
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6 | * COPYRIGHT (c) 1989-1999. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * Modified for LEON3 BSP. |
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10 | * COPYRIGHT (c) 2004. |
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11 | * Gaisler Research. |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.com/license/LICENSE. |
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16 | * |
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17 | * $Id$ |
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18 | */ |
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19 | |
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20 | #include <bsp.h> |
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21 | #include <rtems/libio.h> |
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22 | #include <stdlib.h> |
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23 | #include <assert.h> |
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24 | |
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25 | /* |
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26 | * console_outbyte_polled |
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27 | * |
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28 | * This routine transmits a character using polling. |
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29 | */ |
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30 | |
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31 | void console_outbyte_polled( |
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32 | int port, |
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33 | unsigned char ch |
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34 | ) |
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35 | { |
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36 | if ((port >= 0) && (port <= CONFIGURE_NUMBER_OF_TERMIOS_PORTS)) |
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37 | { |
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38 | while ( (LEON3_Console_Uart[LEON3_Cpu_Index+port]->status & |
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39 | LEON_REG_UART_STATUS_THE) == 0 ); |
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40 | LEON3_Console_Uart[LEON3_Cpu_Index+port]->data = (unsigned int) ch; |
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41 | } |
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42 | } |
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43 | |
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44 | /* |
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45 | * console_inbyte_nonblocking |
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46 | * |
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47 | * This routine polls for a character. |
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48 | */ |
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49 | |
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50 | int console_inbyte_nonblocking( int port ) |
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51 | { |
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52 | |
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53 | if ((port >=0) && (port < CONFIGURE_NUMBER_OF_TERMIOS_PORTS)) |
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54 | { |
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55 | |
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56 | if (LEON3_Console_Uart[LEON3_Cpu_Index+port]->status & LEON_REG_UART_STATUS_ERR) { |
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57 | LEON3_Console_Uart[LEON3_Cpu_Index+port]->status = ~LEON_REG_UART_STATUS_ERR; |
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58 | } |
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59 | |
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60 | if ((LEON3_Console_Uart[LEON3_Cpu_Index+port]->status & LEON_REG_UART_STATUS_DR) == 0) |
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61 | return -1; |
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62 | return (int) LEON3_Console_Uart[LEON3_Cpu_Index+port]->data; |
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63 | } |
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64 | |
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65 | else |
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66 | { |
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67 | assert( 0 ); |
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68 | } |
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69 | |
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70 | return -1; |
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71 | } |
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72 | |
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73 | /* putchar/getchar for printk */ |
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74 | |
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75 | static void bsp_out_char(char c) |
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76 | { |
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77 | console_outbyte_polled(0, c); |
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78 | } |
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79 | |
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80 | BSP_output_char_function_type BSP_output_char = bsp_out_char; |
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81 | |
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82 | static char bsp_in_char(void) |
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83 | { |
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84 | int tmp; |
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85 | |
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86 | while ((tmp = console_inbyte_nonblocking(0)) < 0); |
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87 | return (char) tmp; |
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88 | } |
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89 | |
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90 | BSP_polling_getchar_function_type BSP_poll_char = bsp_in_char; |
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