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[port]->status & LEON_REG_UART_STATUS_THE) == 0 ); |
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39 | LEON3_Console_Uart[port]->data = (unsigned int) ch; |
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40 | } |
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41 | } |
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42 | |
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43 | /* |
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44 | * console_inbyte_nonblocking |
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45 | * |
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46 | * This routine polls for a character. |
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47 | */ |
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48 | |
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49 | int console_inbyte_nonblocking( int port ) |
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50 | { |
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51 | |
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52 | if ((port >=0) && (port < CONFIGURE_NUMBER_OF_TERMIOS_PORTS)) |
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53 | { |
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54 | |
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55 | if (LEON3_Console_Uart[port]->status & LEON_REG_UART_STATUS_ERR) { |
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56 | LEON3_Console_Uart[port]->status = ~LEON_REG_UART_STATUS_ERR; |
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57 | } |
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58 | |
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59 | if ((LEON3_Console_Uart[port]->status & LEON_REG_UART_STATUS_DR) == 0) |
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60 | return -1; |
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61 | return (int) LEON3_Console_Uart[port]->data; |
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62 | } |
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63 | |
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64 | else |
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65 | { |
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66 | assert( 0 ); |
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67 | } |
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68 | |
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69 | return -1; |
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70 | } |
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71 | |
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72 | /* |
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73 | * DEBUG_puts |
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74 | * |
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75 | * This should be safe in the event of an error. It attempts to insure |
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76 | * that no TX empty interrupts occur while it is doing polled IO. Then |
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77 | * it restores the state of that external interrupt. |
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78 | * |
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79 | * Input parameters: |
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80 | * string - pointer to debug output string |
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81 | * |
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82 | * Output parameters: NONE |
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83 | * |
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84 | * Return values: NONE |
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85 | */ |
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86 | |
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87 | void DEBUG_puts( |
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88 | char *string |
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89 | ) |
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90 | { |
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91 | char *s; |
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92 | uint32_t level; |
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93 | |
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94 | /* LEON_Disable_interrupt( LEON_INTERRUPT_UART_1_RX_TX, old_level ); */ |
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95 | level = sparc_disable_interrupts(); |
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96 | LEON3_Console_Uart[0]->ctrl = LEON_REG_UART_CTRL_TE; |
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97 | for ( s = string ; *s ; s++ ) |
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98 | console_outbyte_polled( 0, *s ); |
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99 | |
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100 | console_outbyte_polled( 0, '\r' ); |
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101 | console_outbyte_polled( 0, '\n' ); |
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102 | sparc_enable_interrupts(level); |
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103 | /* LEON_Restore_interrupt( LEON_INTERRUPT_UART_1_RX_TX, old_level ); */ |
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104 | } |
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