[3235ad9] | 1 | /* |
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| 2 | * This file contains the PowerPC 403GA console IO package. |
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| 3 | * |
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| 4 | * Author: Andrew Bray <andy@i-cubed.demon.co.uk> |
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| 5 | * |
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| 6 | * COPYRIGHT (c) 1995 by i-cubed ltd. |
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| 7 | * |
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| 8 | * To anyone who acknowledges that this file is provided "AS IS" |
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| 9 | * without any express or implied warranty: |
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| 10 | * permission to use, copy, modify, and distribute this file |
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| 11 | * for any purpose is hereby granted without fee, provided that |
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| 12 | * the above copyright notice and this notice appears in all |
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| 13 | * copies, and that the name of i-cubed limited not be used in |
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| 14 | * advertising or publicity pertaining to distribution of the |
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| 15 | * software without specific, written prior permission. |
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| 16 | * i-cubed limited makes no representations about the suitability |
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| 17 | * of this software for any purpose. |
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| 18 | * |
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| 19 | * Derived from c/src/lib/libbsp/no_cpu/no_bsp/console/console.c: |
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| 20 | * |
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| 21 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 22 | * On-Line Applications Research Corporation (OAR). |
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| 23 | * All rights assigned to U.S. Government, 1994. |
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| 24 | * |
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| 25 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 26 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 27 | * notice must appear in all copies of this file and its derivatives. |
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| 28 | * |
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[879a047] | 29 | * $Id$ |
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[3235ad9] | 30 | */ |
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| 31 | |
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| 32 | #define NO_BSP_INIT |
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| 33 | |
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[3a4ae6c] | 34 | #include <bsp.h> |
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| 35 | #include <rtems/libio.h> |
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[3235ad9] | 36 | |
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| 37 | extern rtems_cpu_table Cpu_table; /* owned by BSP */ |
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| 38 | |
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| 39 | struct async { |
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| 40 | /*-----------------------------------------------------------------------------+ |
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| 41 | | Line Status Register. |
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| 42 | +-----------------------------------------------------------------------------*/ |
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| 43 | unsigned char SPLS; |
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| 44 | unsigned char SPLSset; |
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| 45 | #define LSRDataReady 0x80 |
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| 46 | #define LSRFramingError 0x40 |
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| 47 | #define LSROverrunError 0x20 |
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| 48 | #define LSRParityError 0x10 |
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| 49 | #define LSRBreakInterrupt 0x08 |
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| 50 | #define LSRTxHoldEmpty 0x04 |
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| 51 | #define LSRTxShiftEmpty 0x02 |
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| 52 | |
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| 53 | /*-----------------------------------------------------------------------------+ |
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| 54 | | Handshake Status Register. |
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| 55 | +-----------------------------------------------------------------------------*/ |
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| 56 | unsigned char SPHS; |
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| 57 | unsigned char SPHSset; |
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| 58 | #define HSRDsr 0x80 |
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| 59 | #define HSRCts 0x40 |
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| 60 | |
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| 61 | /*-----------------------------------------------------------------------------+ |
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| 62 | | Baud rate divisor registers |
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| 63 | +-----------------------------------------------------------------------------*/ |
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| 64 | unsigned char BRDH; |
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| 65 | unsigned char BRDL; |
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| 66 | |
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| 67 | /*-----------------------------------------------------------------------------+ |
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| 68 | | Control Register. |
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| 69 | +-----------------------------------------------------------------------------*/ |
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| 70 | unsigned char SPCTL; |
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| 71 | #define CRNormal 0x00 |
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| 72 | #define CRLoopback 0x40 |
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| 73 | #define CRAutoEcho 0x80 |
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| 74 | #define CRDtr 0x20 |
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| 75 | #define CRRts 0x10 |
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| 76 | #define CRWordLength7 0x00 |
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| 77 | #define CRWordLength8 0x08 |
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| 78 | #define CRParityDisable 0x00 |
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| 79 | #define CRParityEnable 0x04 |
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| 80 | #define CREvenParity 0x00 |
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| 81 | #define CROddParity 0x02 |
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| 82 | #define CRStopBitsOne 0x00 |
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| 83 | #define CRStopBitsTwo 0x01 |
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| 84 | #define CRDisableDtrRts 0x00 |
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| 85 | |
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| 86 | /*-----------------------------------------------------------------------------+ |
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| 87 | | Receiver Command Register. |
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| 88 | +-----------------------------------------------------------------------------*/ |
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| 89 | unsigned char SPRC; |
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| 90 | #define RCRDisable 0x00 |
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| 91 | #define RCREnable 0x80 |
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| 92 | #define RCRIntDisable 0x00 |
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| 93 | #define RCRIntEnabled 0x20 |
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| 94 | #define RCRDMACh2 0x40 |
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| 95 | #define RCRDMACh3 0x60 |
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| 96 | #define RCRErrorInt 0x10 |
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| 97 | #define RCRPauseEnable 0x08 |
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| 98 | |
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| 99 | /*-----------------------------------------------------------------------------+ |
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| 100 | | Transmitter Command Register. |
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| 101 | +-----------------------------------------------------------------------------*/ |
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| 102 | unsigned char SPTC; |
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| 103 | #define TCRDisable 0x00 |
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| 104 | #define TCREnable 0x80 |
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| 105 | #define TCRIntDisable 0x00 |
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| 106 | #define TCRIntEnabled 0x20 |
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| 107 | #define TCRDMACh2 0x40 |
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| 108 | #define TCRDMACh3 0x60 |
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| 109 | #define TCRTxEmpty 0x10 |
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| 110 | #define TCRErrorInt 0x08 |
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| 111 | #define TCRStopPause 0x04 |
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| 112 | #define TCRBreakGen 0x02 |
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| 113 | |
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| 114 | /*-----------------------------------------------------------------------------+ |
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| 115 | | Miscellanies defines. |
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| 116 | +-----------------------------------------------------------------------------*/ |
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| 117 | unsigned char SPTB; |
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| 118 | #define SPRB SPTB |
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| 119 | }; |
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| 120 | |
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| 121 | #define XOFFchar 0x13 |
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| 122 | #define XONchar 0x11 |
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| 123 | |
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| 124 | typedef volatile struct async *pasync; |
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| 125 | static const pasync port = (pasync)0x40000000; |
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| 126 | |
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| 127 | /* console_initialize |
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| 128 | * |
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| 129 | * This routine initializes the console IO driver. |
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| 130 | * |
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| 131 | * Input parameters: NONE |
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| 132 | * |
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| 133 | * Output parameters: NONE |
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| 134 | * |
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| 135 | * Return values: |
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| 136 | */ |
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| 137 | |
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| 138 | rtems_device_driver console_initialize( |
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| 139 | rtems_device_major_number major, |
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| 140 | rtems_device_minor_number minor, |
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[3a4ae6c] | 141 | void *arg |
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[3235ad9] | 142 | ) |
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| 143 | { |
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[3a4ae6c] | 144 | rtems_status_code status; |
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[3235ad9] | 145 | register unsigned tmp; |
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| 146 | |
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| 147 | /* Initialise the serial port */ |
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| 148 | asm volatile ("mfiocr %0" : "=r" (tmp)); |
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| 149 | tmp &= ~3; |
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| 150 | tmp |= (Cpu_table.serial_external_clock ? 2 : 0) | |
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| 151 | (Cpu_table.serial_cts_rts ? 1 : 0); |
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| 152 | asm volatile ("mtiocr %0" : "=r" (tmp) : "0" (tmp)); |
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| 153 | port->SPLS = (LSRDataReady | LSRFramingError | LSROverrunError | |
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| 154 | LSRParityError | LSRBreakInterrupt); |
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| 155 | tmp = Cpu_table.serial_per_sec / Cpu_table.serial_rate; |
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| 156 | tmp = ((tmp + 8) >> 4) - 1; |
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| 157 | port->BRDL = tmp & 0x255; |
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| 158 | port->BRDH = tmp >> 8; |
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| 159 | port->SPCTL = (CRNormal | CRDtr | CRRts | CRWordLength8 | CRParityDisable | |
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| 160 | CRStopBitsOne); |
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| 161 | port->SPRC = (RCREnable | RCRIntDisable | RCRPauseEnable); |
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| 162 | port->SPTC = (TCREnable | TCRIntDisable); |
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| 163 | port->SPHS = (HSRDsr | HSRCts); |
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| 164 | |
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[3a4ae6c] | 165 | status = rtems_io_register_name( |
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| 166 | "/dev/console", |
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| 167 | major, |
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| 168 | (rtems_device_minor_number) 0 |
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| 169 | ); |
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| 170 | |
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| 171 | if (status != RTEMS_SUCCESSFUL) |
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| 172 | rtems_fatal_error_occurred(status); |
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| 173 | |
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| 174 | return RTEMS_SUCCESSFUL; |
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[3235ad9] | 175 | } |
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| 176 | |
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| 177 | |
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| 178 | /* is_character_ready |
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| 179 | * |
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| 180 | * This routine returns TRUE if a character is available. |
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| 181 | * |
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| 182 | * Input parameters: NONE |
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| 183 | * |
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| 184 | * Output parameters: NONE |
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| 185 | * |
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| 186 | * Return values: |
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| 187 | */ |
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| 188 | |
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| 189 | rtems_boolean is_character_ready( |
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| 190 | char *ch |
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| 191 | ) |
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| 192 | { |
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| 193 | unsigned char status; |
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| 194 | |
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| 195 | if ((status = port->SPLS) & LSRDataReady) |
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| 196 | { |
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| 197 | *ch = port->SPRB; |
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| 198 | return(TRUE); |
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| 199 | } |
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| 200 | |
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| 201 | /* Clean any dodgy status */ |
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| 202 | if ((status & (LSRFramingError | LSROverrunError | LSRParityError | |
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| 203 | LSRBreakInterrupt)) != 0) |
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| 204 | { |
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| 205 | port->SPLS = (LSRFramingError | LSROverrunError | LSRParityError | |
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| 206 | LSRBreakInterrupt); |
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| 207 | } |
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| 208 | |
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| 209 | return FALSE; |
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| 210 | } |
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| 211 | |
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| 212 | /* inbyte |
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| 213 | * |
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| 214 | * This routine reads a character from the SOURCE. |
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| 215 | * |
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| 216 | * Input parameters: NONE |
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| 217 | * |
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| 218 | * Output parameters: NONE |
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| 219 | * |
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| 220 | * Return values: |
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| 221 | * character read from SOURCE |
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| 222 | */ |
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| 223 | |
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| 224 | char inbyte( void ) |
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| 225 | { |
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| 226 | unsigned char status; |
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| 227 | |
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| 228 | while (1) |
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| 229 | { |
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| 230 | if ((status = port->SPLS) & LSRDataReady) |
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| 231 | break; |
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| 232 | |
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| 233 | /* Clean any dodgy status */ |
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| 234 | if ((status & (LSRFramingError | LSROverrunError | LSRParityError | |
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| 235 | LSRBreakInterrupt)) != 0) |
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| 236 | { |
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| 237 | port->SPLS = (LSRFramingError | LSROverrunError | LSRParityError | |
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| 238 | LSRBreakInterrupt); |
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| 239 | } |
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| 240 | } |
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| 241 | |
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| 242 | return port->SPRB; |
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| 243 | } |
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| 244 | |
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| 245 | /* outbyte |
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| 246 | * |
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| 247 | * This routine transmits a character out the SOURCE. It may support |
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| 248 | * XON/XOFF flow control. |
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| 249 | * |
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| 250 | * Input parameters: |
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| 251 | * ch - character to be transmitted |
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| 252 | * |
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| 253 | * Output parameters: NONE |
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| 254 | */ |
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| 255 | |
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| 256 | void outbyte( |
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| 257 | char ch |
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| 258 | ) |
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| 259 | { |
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| 260 | unsigned char status; |
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| 261 | |
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| 262 | while (port->SPHS) |
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| 263 | port->SPHS = (HSRDsr | HSRCts); |
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| 264 | |
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| 265 | while (1) |
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| 266 | { |
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| 267 | status = port->SPLS; |
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| 268 | |
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| 269 | if (port->SPHS) |
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| 270 | port->SPHS = (HSRDsr | HSRCts); |
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| 271 | else if (status & LSRTxHoldEmpty) |
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| 272 | break; |
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| 273 | } |
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| 274 | |
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| 275 | if (Cpu_table.serial_xon_xoff) |
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| 276 | while (is_character_ready(&status)) |
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| 277 | { |
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| 278 | if (status == XOFFchar) |
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| 279 | do |
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| 280 | { |
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| 281 | while (!is_character_ready(&status)); |
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| 282 | } |
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| 283 | while (status != XONchar); |
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| 284 | } |
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| 285 | |
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| 286 | port->SPTB = ch; |
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| 287 | } |
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| 288 | |
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| 289 | /* |
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[3a4ae6c] | 290 | * Open entry point |
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[3235ad9] | 291 | */ |
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[3a4ae6c] | 292 | |
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| 293 | rtems_device_driver console_open( |
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| 294 | rtems_device_major_number major, |
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| 295 | rtems_device_minor_number minor, |
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| 296 | void * arg |
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[3235ad9] | 297 | ) |
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| 298 | { |
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[3a4ae6c] | 299 | return RTEMS_SUCCESSFUL; |
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| 300 | } |
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| 301 | |
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| 302 | /* |
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| 303 | * Close entry point |
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| 304 | */ |
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| 305 | |
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| 306 | rtems_device_driver console_close( |
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| 307 | rtems_device_major_number major, |
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| 308 | rtems_device_minor_number minor, |
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| 309 | void * arg |
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| 310 | ) |
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| 311 | { |
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| 312 | return RTEMS_SUCCESSFUL; |
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| 313 | } |
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| 314 | |
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| 315 | /* |
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| 316 | * read bytes from the serial port. We only have stdin. |
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| 317 | */ |
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| 318 | |
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| 319 | rtems_device_driver console_read( |
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| 320 | rtems_device_major_number major, |
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| 321 | rtems_device_minor_number minor, |
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| 322 | void * arg |
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| 323 | ) |
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| 324 | { |
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| 325 | rtems_libio_rw_args_t *rw_args; |
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| 326 | char *buffer; |
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| 327 | int maximum; |
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| 328 | int count = 0; |
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| 329 | |
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| 330 | rw_args = (rtems_libio_rw_args_t *) arg; |
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| 331 | |
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| 332 | buffer = rw_args->buffer; |
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| 333 | maximum = rw_args->count; |
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| 334 | |
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| 335 | for (count = 0; count < maximum; count++) { |
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| 336 | buffer[ count ] = inbyte(); |
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| 337 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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| 338 | buffer[ count++ ] = '\n'; |
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| 339 | buffer[ count ] = 0; |
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[3235ad9] | 340 | break; |
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| 341 | } |
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| 342 | } |
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[3a4ae6c] | 343 | |
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| 344 | rw_args->bytes_moved = count; |
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| 345 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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[3235ad9] | 346 | } |
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[3a4ae6c] | 347 | |
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[3235ad9] | 348 | /* |
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[3a4ae6c] | 349 | * write bytes to the serial port. Stdout and stderr are the same. |
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[3235ad9] | 350 | */ |
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[3a4ae6c] | 351 | |
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| 352 | rtems_device_driver console_write( |
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| 353 | rtems_device_major_number major, |
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| 354 | rtems_device_minor_number minor, |
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| 355 | void * arg |
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[3235ad9] | 356 | ) |
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| 357 | { |
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[3a4ae6c] | 358 | int count; |
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| 359 | int maximum; |
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| 360 | rtems_libio_rw_args_t *rw_args; |
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| 361 | char *buffer; |
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| 362 | |
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| 363 | rw_args = (rtems_libio_rw_args_t *) arg; |
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| 364 | |
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| 365 | buffer = rw_args->buffer; |
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| 366 | maximum = rw_args->count; |
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| 367 | |
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| 368 | for (count = 0; count < maximum; count++) { |
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| 369 | if ( buffer[ count ] == '\n') { |
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| 370 | outbyte('\r'); |
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[3235ad9] | 371 | } |
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[3a4ae6c] | 372 | outbyte( buffer[ count ] ); |
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[3235ad9] | 373 | } |
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[3a4ae6c] | 374 | return maximum; |
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| 375 | } |
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| 376 | |
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| 377 | /* |
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| 378 | * IO Control entry point |
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| 379 | */ |
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| 380 | |
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| 381 | rtems_device_driver console_control( |
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| 382 | rtems_device_major_number major, |
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| 383 | rtems_device_minor_number minor, |
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| 384 | void * arg |
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| 385 | ) |
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| 386 | { |
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| 387 | return RTEMS_SUCCESSFUL; |
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[3235ad9] | 388 | } |
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[3a4ae6c] | 389 | |
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