1 | /* |
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2 | * Generic UART Serial driver for Motorola Coldfire processors definitions |
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3 | * |
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4 | * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russian Fed. |
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5 | * Author: Victor V. Vengerov <vvv@oktet.ru> |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * |
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10 | * http://www.rtems.com/license/LICENSE. |
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11 | * |
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12 | * @(#) $Id$ |
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13 | * |
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14 | */ |
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15 | |
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16 | #ifndef __MCFUART_H__ |
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17 | #define __MCFUART_H__ |
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18 | |
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19 | #include <termios.h> |
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20 | #include "bsp.h" |
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21 | #include "mcf5206e.h" |
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22 | |
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23 | /* |
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24 | * The MCF5206e System Clock Frequency; 54MHz default |
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25 | */ |
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26 | #ifndef SYSTEM_CLOCK_FREQUENCY |
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27 | #define SYSTEM_CLOCK_FREQUENCY BSP_SYSTEM_FREQUENCY |
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28 | #endif |
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29 | |
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30 | /* |
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31 | * The following structure is a descriptor of single UART channel. |
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32 | * It contains the initialization information about channel and |
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33 | * current operating values |
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34 | */ |
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35 | typedef struct mcfuart { |
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36 | uint32_t chn; /* UART channel number */ |
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37 | uint8_t intvec; /* UART interrupt vector number, or |
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38 | 0 if polled I/O */ |
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39 | void *tty; /* termios channel descriptor */ |
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40 | |
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41 | volatile const uint8_t *tx_buf; /* Transmit buffer from termios */ |
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42 | volatile uint32_t tx_buf_len; /* Transmit buffer length */ |
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43 | volatile uint32_t tx_ptr; /* Index of next char to transmit*/ |
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44 | rtems_isr_entry old_handler; /* Saved interrupt handler */ |
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45 | |
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46 | tcflag_t c_iflag; /* termios input mode flags */ |
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47 | rtems_boolean parerr_mark_flag; /* Parity error processing |
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48 | state */ |
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49 | } mcfuart; |
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50 | |
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51 | /* mcfuart_init -- |
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52 | * This function verifies the input parameters and perform initialization |
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53 | * of the Motorola Coldfire on-chip UART descriptor structure. |
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54 | * |
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55 | */ |
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56 | rtems_status_code |
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57 | mcfuart_init(mcfuart *uart, void *tty, uint8_t intvec, |
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58 | uint32_t chn); |
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59 | |
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60 | /* mcfuart_reset -- |
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61 | * This function perform the hardware initialization of Motorola |
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62 | * Coldfire processor on-chip UART controller using parameters |
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63 | * filled by the mcfuart_init function. |
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64 | */ |
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65 | rtems_status_code |
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66 | mcfuart_reset(mcfuart *uart); |
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67 | |
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68 | /* mcfuart_disable -- |
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69 | * This function disable the operations on Motorola Coldfire UART |
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70 | * controller |
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71 | */ |
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72 | rtems_status_code |
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73 | mcfuart_disable(mcfuart *uart); |
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74 | |
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75 | /* mcfuart_set_attributes -- |
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76 | * This function parse the termios attributes structure and perform |
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77 | * the appropriate settings in hardware. |
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78 | */ |
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79 | int |
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80 | mcfuart_set_attributes(mcfuart *mcf, const struct termios *t); |
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81 | |
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82 | /* mcfuart_poll_read -- |
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83 | * This function tried to read character from MCF UART and perform |
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84 | * error handling. |
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85 | */ |
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86 | int |
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87 | mcfuart_poll_read(mcfuart *uart); |
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88 | |
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89 | /* mcfuart_interrupt_write -- |
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90 | * This function initiate transmitting of the buffer in interrupt mode. |
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91 | */ |
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92 | int |
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93 | mcfuart_interrupt_write(mcfuart *uart, const char *buf, int len); |
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94 | |
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95 | /* mcfuart_poll_write -- |
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96 | * This function transmit buffer byte-by-byte in polling mode. |
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97 | */ |
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98 | int |
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99 | mcfuart_poll_write(mcfuart *uart, const char *buf, int len); |
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100 | |
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101 | /* mcfuart_stop_remote_tx -- |
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102 | * This function stop data flow from remote device. |
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103 | */ |
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104 | int |
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105 | mcfuart_stop_remote_tx(mcfuart *uart); |
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106 | |
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107 | /* mcfuart_start_remote_tx -- |
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108 | * This function resume data flow from remote device. |
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109 | */ |
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110 | int |
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111 | mcfuart_start_remote_tx(mcfuart *uart); |
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112 | |
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113 | #endif |
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