[274fa77] | 1 | /***************************************************************************** |
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| 2 | * File: sci.c |
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| 3 | * |
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| 4 | * Desc: This file contains the console IO routines for the SCI port. |
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| 5 | * There are two interfaces in this module. One is for the rtems |
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| 6 | * termios/console code and the other is a device driver interface. |
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| 7 | * This module works together with the termio module which is |
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| 8 | * sometimes referred to as the "line disciplines" which implements |
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| 9 | * terminal i/o processing like tabs, backspaces, and newlines. |
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| 10 | * The rtems printf uses interrupt io and the rtems printk routine |
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| 11 | * uses polled io which is better for debugging. |
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| 12 | * |
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| 13 | * Index: Documentation |
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| 14 | * Section A - Include Files |
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| 15 | * Section B - Manifest Constants |
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| 16 | * Section C - External Data |
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| 17 | * Section D - External Functions |
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| 18 | * Section E - Local Functions |
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| 19 | * Section F - Local Variables |
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| 20 | * Section G - A circular data buffer for rcv chars |
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| 21 | * Section H - RTEMS termios callbacks for the interrupt api |
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| 22 | * Section I - RTEMS termios callbacks for the polled api |
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| 23 | |
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| 24 | * Section 0 - Miscellaneous routines |
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| 25 | * Section 1 - Routines to manipulate the circular buffer |
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| 26 | * Section 2 - Interrupt based entry points for the termios module |
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| 27 | * Section 3 - Polling based entry points for the termios module |
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| 28 | * Section 4 - Device driver public api entry points |
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| 29 | * Section 5 - Hardware level routines |
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| 30 | * Section 6 - Testing and debugging code |
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| 31 | * |
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| 32 | * Refer: Motorola QSM Reference Manual - Chapter 5 - SCI sub-module |
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| 33 | * |
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| 34 | * Note: See bsp.h,confdefs.h,system.h for installing drivers into RTEMS. |
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| 35 | * |
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| 36 | * $Id$ |
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| 37 | * |
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| 38 | * $Log$ |
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[b8490b9] | 39 | * Revision 1.3 2003/01/20 20:33:17 joel |
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| 40 | * 2003-01-20 Duane Gustavus <duane@unt.edu> |
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| 41 | * |
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| 42 | * * console/sci.c, include/mrm332.h, startup/linkcmds, |
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| 43 | * startup/linkcmds_ROM: Various updates to make this run properly |
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| 44 | * from ROM. |
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| 45 | * |
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[c0c6168] | 46 | * Revision 1.2 2002/11/04 14:26:47 joel |
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| 47 | * 2002-11-04 Joel Sherrill <joel@OARcorp.com> |
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| 48 | * |
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| 49 | * * console/sci.c, spurious/spinit.c: Removed warnings. |
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| 50 | * |
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[0b6d74d0] | 51 | * Revision 1.1 2002/02/28 23:10:39 joel |
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| 52 | * 2002-02-28 Mike Panetta <ahuitzot@mindspring.com> |
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| 53 | * |
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| 54 | * * console/sci.c, console/sci.h, |
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| 55 | * console/console.c: Added new SCI driver. |
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| 56 | * * start/start.c: Removed file. |
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| 57 | * * start/start.S: New file, the asm portion of the updated start code. |
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| 58 | * * start/configure.am: Added start.S, removed start.c |
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| 59 | * * startup/start_c.c: New file, the C portion of the updated start code. Contains most of the code that was in the old start.c. |
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| 60 | * * startup/configure.am: Added start_c.c to C_FILES. |
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| 61 | * * include/bsp.h: Added include <rtems/bspIo.h> |
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| 62 | * |
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[274fa77] | 63 | *****************************************************************************/ |
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| 64 | |
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| 65 | |
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| 66 | /***************************************************************************** |
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| 67 | Compiler Options for the incurably curious |
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| 68 | *****************************************************************************/ |
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| 69 | |
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| 70 | /* |
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| 71 | /opt/rtems/bin/m68k-rtems-gcc |
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| 72 | --pipe # use pipes, not tmp files |
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| 73 | -B../../../../../../../../opti/lib/ # where the library is |
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| 74 | -specs bsp_specs # ??? |
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| 75 | -qrtems # ??? |
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| 76 | -g # add debugging info |
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| 77 | -Wall # issue all warnings |
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| 78 | -fasm # allow inline asm??? |
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| 79 | -DCONSOLE_SCI # for opti-r box/rev b proto |
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| 80 | -mcpu32 # machine = motorola cpu 32 |
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| 81 | -c # compile, don't link |
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| 82 | -O4 # max optimization |
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| 83 | -fomit-frame-pointer # stack frames are optional |
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| 84 | -o o-optimize/sci.o # the object file |
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| 85 | ../../../../../../../../../rtems/c/src/lib/libbsp/m68k/opti/console/sci.c |
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| 86 | */ |
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| 87 | |
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| 88 | |
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| 89 | /***************************************************************************** |
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| 90 | Overview of serial port console terminal input/output |
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| 91 | *****************************************************************************/ |
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| 92 | |
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| 93 | /* |
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| 94 | +-----------+ +---------+ |
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| 95 | | app | | app | |
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| 96 | +-----------+ +---------+ |
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| 97 | | | |
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| 98 | | (printf,scanf,etc.) | |
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| 99 | v | |
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| 100 | +-----------+ | |
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| 101 | | libc | | |
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| 102 | +-----------+ | |
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| 103 | | | |
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| 104 | | | |
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| 105 | | (open,close,read,write,ioctl) | |
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| 106 | ======|==========================================|======================== |
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| 107 | | /dev/console | /dev/sci |
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| 108 | | (stdin,stdout,stderr) | |
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| 109 | ======|==========================================|======================== |
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| 110 | | | |
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| 111 | | | |
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| 112 | v v |
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| 113 | +-----------+ +-----------+ +---------+ |
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| 114 | | console | <---> | termios | <---> | sci | |
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| 115 | | driver | | module | | driver | |
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| 116 | +-----------+ +-----------+ +---------+ |
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| 117 | | |
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| 118 | | |
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| 119 | v |
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| 120 | +---------+ |
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| 121 | | | |
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| 122 | | uart | |
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| 123 | | | |
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| 124 | +---------+ |
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| 125 | */ |
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| 126 | |
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| 127 | |
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| 128 | /***************************************************************************** |
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| 129 | Section A - Include Files |
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| 130 | *****************************************************************************/ |
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| 131 | |
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[c0c6168] | 132 | #include <rtems.h> |
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[274fa77] | 133 | #include <bsp.h> |
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[0b6d74d0] | 134 | #include <rtems/bspIo.h> |
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| 135 | #include <stdio.h> |
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[274fa77] | 136 | #include <rtems/libio.h> |
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| 137 | #include <libchip/serial.h> |
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| 138 | #include <libchip/sersupp.h> |
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| 139 | #include "sci.h" |
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| 140 | //#include "../misc/include/cpu332.h" |
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| 141 | |
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| 142 | |
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| 143 | /***************************************************************************** |
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| 144 | Section B - Manifest Constants |
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| 145 | *****************************************************************************/ |
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| 146 | |
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| 147 | #define SCI_MINOR 0 // minor device number |
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| 148 | |
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| 149 | |
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| 150 | // IMPORTANT - if the device driver api is opened, it means the sci is being |
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| 151 | // used for direct hardware access, so other users (like termios) get ignored |
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| 152 | |
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| 153 | #define DRIVER_CLOSED 0 // the device driver api is closed |
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| 154 | #define DRIVER_OPENED 1 // the device driver api is opened |
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| 155 | |
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| 156 | |
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| 157 | // system clock definitions, i dont have documentation on this... |
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| 158 | |
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| 159 | #if 0 // Not needed, this is provided in mrm332.h |
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| 160 | #define XTAL 32768.0 // crystal frequency in Hz |
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| 161 | #define NUMB_W 0 // system clock parameters |
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| 162 | #define NUMB_X 1 |
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| 163 | //efine NUMB_Y 0x38 // for 14.942 Mhz |
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| 164 | #define NUMB_Y 0x3F // for 16.777 Mhz |
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| 165 | |
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| 166 | #define SYS_CLOCK (XTAL * 4.0 * (NUMB_Y+1) * (1 << (2 * NUMB_W + NUMB_X))) |
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| 167 | |
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| 168 | #endif |
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| 169 | |
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| 170 | |
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| 171 | /***************************************************************************** |
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| 172 | Section C - External Data |
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| 173 | *****************************************************************************/ |
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| 174 | |
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| 175 | |
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| 176 | |
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| 177 | |
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| 178 | /***************************************************************************** |
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| 179 | Section D - External Functions |
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| 180 | *****************************************************************************/ |
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| 181 | |
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| 182 | |
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| 183 | |
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| 184 | /***************************************************************************** |
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| 185 | Section E - Local Functions |
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| 186 | *****************************************************************************/ |
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| 187 | |
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| 188 | void SCI_output_char(char c); |
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| 189 | |
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| 190 | rtems_isr SciIsr( rtems_vector_number vector ); // interrupt handler |
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| 191 | |
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| 192 | const rtems_termios_callbacks * SciGetTermiosHandlers( signed32 polled ); |
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| 193 | |
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| 194 | rtems_device_driver SciInitialize (); // device driver api |
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| 195 | rtems_device_driver SciOpen (); // device driver api |
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| 196 | rtems_device_driver SciClose (); // device driver api |
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| 197 | rtems_device_driver SciRead (); // device driver api |
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| 198 | rtems_device_driver SciWrite (); // device driver api |
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| 199 | rtems_device_driver SciControl (); // device driver api |
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| 200 | |
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| 201 | signed32 SciInterruptOpen(); // termios api |
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| 202 | signed32 SciInterruptClose(); // termios api |
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| 203 | signed32 SciInterruptWrite(); // termios api |
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| 204 | |
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| 205 | signed32 SciSetAttributes(); // termios api |
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| 206 | |
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| 207 | signed32 SciPolledOpen(); // termios api |
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| 208 | signed32 SciPolledClose(); // termios api |
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| 209 | signed32 SciPolledRead(); // termios api |
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| 210 | signed32 SciPolledWrite(); // termios api |
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| 211 | |
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| 212 | static void SciSetBaud(unsigned32 rate); // hardware routine |
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| 213 | static void SciSetDataBits(unsigned16 bits); // hardware routine |
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| 214 | static void SciSetParity(unsigned16 parity); // hardware routine |
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| 215 | |
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| 216 | static void inline SciDisableAllInterrupts( void ); // hardware routine |
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| 217 | static void inline SciDisableTransmitInterrupts( void );// hardware routine |
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| 218 | static void inline SciDisableReceiveInterrupts( void ); // hardware routine |
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| 219 | |
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| 220 | static void inline SciEnableTransmitInterrupts( void ); // hardware routine |
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| 221 | static void inline SciEnableReceiveInterrupts( void ); // hardware routine |
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| 222 | |
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| 223 | static void inline SciDisableReceiver( void ); // hardware routine |
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| 224 | static void inline SciDisableTransmitter( void ); // hardware routine |
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| 225 | |
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| 226 | static void inline SciEnableReceiver( void ); // hardware routine |
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| 227 | static void inline SciEnableTransmitter( void ); // hardware routine |
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| 228 | |
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| 229 | void SciWriteCharWait ( unsigned8 ); // hardware routine |
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| 230 | void SciWriteCharNoWait( unsigned8 ); // hardware routine |
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| 231 | |
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| 232 | unsigned8 inline SciCharAvailable( void ); // hardware routine |
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| 233 | |
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| 234 | unsigned8 inline SciReadCharWait( void ); // hardware routine |
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| 235 | unsigned8 inline SciReadCharNoWait( void ); // hardware routine |
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| 236 | |
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| 237 | void SciSendBreak( void ); // test routine |
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| 238 | |
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| 239 | static signed8 SciRcvBufGetChar(); // circular rcv buf |
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| 240 | static void SciRcvBufPutChar( unsigned8 ); // circular rcv buf |
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| 241 | //atic void SciRcvBufFlush( void ); // circular rcv buf |
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| 242 | |
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| 243 | void SciUnitTest(); // test routine |
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| 244 | void SciPrintStats(); // test routine |
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| 245 | |
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| 246 | |
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| 247 | /***************************************************************************** |
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| 248 | Section F - Local Variables |
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| 249 | *****************************************************************************/ |
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| 250 | |
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| 251 | static struct rtems_termios_tty *SciTermioTty; |
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| 252 | |
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| 253 | |
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| 254 | static unsigned8 SciInited = 0; // has the driver been inited |
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| 255 | |
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| 256 | static unsigned8 SciOpened; // has the driver been opened |
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| 257 | |
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| 258 | static unsigned8 SciMajor; // major device number |
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| 259 | |
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| 260 | static unsigned16 SciBaud; // current value in baud register |
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| 261 | |
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| 262 | static unsigned32 SciBytesIn = 0; // bytes received |
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| 263 | static unsigned32 SciBytesOut = 0; // bytes transmitted |
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| 264 | |
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| 265 | static unsigned32 SciErrorsParity = 0; // error counter |
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| 266 | static unsigned32 SciErrorsNoise = 0; // error counter |
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| 267 | static unsigned32 SciErrorsFraming = 0; // error counter |
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| 268 | static unsigned32 SciErrorsOverrun = 0; // error counter |
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| 269 | |
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| 270 | #if defined(CONSOLE_SCI) |
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| 271 | |
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| 272 | // this is what rtems printk uses to do polling based output |
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| 273 | |
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| 274 | BSP_output_char_function_type BSP_output_char = SCI_output_char; |
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| 275 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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| 276 | |
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| 277 | #endif |
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| 278 | |
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| 279 | |
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| 280 | // cvs id string so you can use the unix ident command on the object |
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| 281 | |
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| 282 | #ifdef ID_STRINGS |
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| 283 | static const char SciIdent[]="$Id$"; |
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| 284 | #endif |
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| 285 | |
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| 286 | |
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| 287 | /***************************************************************************** |
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| 288 | Section G - A circular buffer for rcv chars when the driver interface is used. |
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| 289 | *****************************************************************************/ |
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| 290 | |
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| 291 | // it is trivial to wrap your buffer pointers when size is a power of two |
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| 292 | |
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| 293 | #define SCI_RCV_BUF_SIZE 256 // must be a power of 2 !!! |
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| 294 | |
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| 295 | // if someone opens the sci device using the device driver interface, |
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| 296 | // then the receive data interrupt handler will put characters in this buffer |
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| 297 | // instead of sending them up to the termios module for the console |
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| 298 | |
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| 299 | static unsigned8 SciRcvBuffer[SCI_RCV_BUF_SIZE]; |
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| 300 | |
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| 301 | static unsigned8 SciRcvBufPutIndex = 0; // array index to put in next char |
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| 302 | |
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| 303 | static unsigned8 SciRcvBufGetIndex = 0; // array index to take out next char |
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| 304 | |
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| 305 | static unsigned8 SciRcvBufCount = 0; // how many bytes are in the buffer |
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| 306 | |
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| 307 | |
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| 308 | |
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| 309 | /***************************************************************************** |
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| 310 | Section H - RTEMS termios callbacks for the interrupt version of the driver |
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| 311 | *****************************************************************************/ |
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| 312 | |
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| 313 | static const rtems_termios_callbacks SciInterruptCallbacks = |
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| 314 | { |
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| 315 | SciInterruptOpen, // first open |
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| 316 | SciInterruptClose, // last close |
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| 317 | NULL, // polled read (not required) |
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| 318 | SciInterruptWrite, // write |
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| 319 | SciSetAttributes, // set attributes |
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| 320 | NULL, // stop remote xmit |
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| 321 | NULL, // start remote xmit |
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| 322 | TRUE // output uses interrupts |
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| 323 | }; |
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| 324 | |
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| 325 | |
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| 326 | /***************************************************************************** |
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| 327 | Section I - RTEMS termios callbacks for the polled version of the driver |
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| 328 | *****************************************************************************/ |
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| 329 | |
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| 330 | static const rtems_termios_callbacks SciPolledCallbacks = |
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| 331 | { |
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| 332 | SciPolledOpen, // first open |
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| 333 | SciPolledClose, // last close |
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| 334 | SciPolledRead, // polled read |
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| 335 | SciPolledWrite, // write |
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| 336 | SciSetAttributes, // set attributes |
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| 337 | NULL, // stop remote xmit |
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| 338 | NULL, // start remote xmit |
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| 339 | FALSE // output uses interrupts |
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| 340 | }; |
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| 341 | |
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| 342 | |
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| 343 | ///////////////////////////////////////////////////////////////////////////// |
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| 344 | // |
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| 345 | // SECTION 0 |
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| 346 | // MISCELLANEOUS ROUTINES |
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| 347 | // |
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| 348 | ///////////////////////////////////////////////////////////////////////////// |
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| 349 | |
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| 350 | |
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| 351 | /**************************************************************************** |
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| 352 | * Func: SCI_output_char |
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| 353 | * Desc: used by rtems printk function to send a char to the uart |
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| 354 | * Inputs: the character to transmit |
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| 355 | * Outputs: none |
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| 356 | * Errors: none |
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| 357 | * Scope: public |
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| 358 | ****************************************************************************/ |
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| 359 | |
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| 360 | void SCI_output_char(char c) |
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| 361 | { |
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| 362 | // ( minor device number, pointer to the character, length ) |
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| 363 | |
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| 364 | SciPolledWrite( SCI_MINOR, &c, 1); |
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| 365 | |
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| 366 | return; |
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| 367 | } |
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| 368 | |
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| 369 | |
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| 370 | /**************************************************************************** |
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| 371 | * Func: SciGetTermiosHandlers |
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| 372 | * Desc: returns a pointer to the table of serial io functions |
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| 373 | * this is called from console_open with polled set to false |
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| 374 | * Inputs: flag indicating whether we want polled or interrupt driven io |
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| 375 | * Outputs: pointer to function table |
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| 376 | * Errors: none |
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| 377 | * Scope: public |
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| 378 | ****************************************************************************/ |
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| 379 | |
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| 380 | const rtems_termios_callbacks * SciGetTermiosHandlers( signed32 polled ) |
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| 381 | { |
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| 382 | if ( polled ) |
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| 383 | { |
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| 384 | return &SciPolledCallbacks; // polling based |
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| 385 | } |
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| 386 | else |
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| 387 | { |
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| 388 | return &SciInterruptCallbacks; // interrupt driven |
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| 389 | } |
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| 390 | } |
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| 391 | |
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| 392 | |
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| 393 | /**************************************************************************** |
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| 394 | * Func: SciIsr |
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| 395 | * Desc: interrupt handler for serial communications interface |
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| 396 | * Inputs: vector number - unused |
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| 397 | * Outputs: none |
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| 398 | * Errors: none |
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| 399 | * Scope: public API |
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| 400 | ****************************************************************************/ |
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| 401 | |
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| 402 | rtems_isr SciIsr( rtems_vector_number vector ) |
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| 403 | { |
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| 404 | unsigned8 ch; |
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| 405 | |
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| 406 | |
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| 407 | if ( (*SCSR) & SCI_ERROR_PARITY ) SciErrorsParity ++; |
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| 408 | if ( (*SCSR) & SCI_ERROR_FRAMING ) SciErrorsFraming ++; |
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| 409 | if ( (*SCSR) & SCI_ERROR_NOISE ) SciErrorsNoise ++; |
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| 410 | if ( (*SCSR) & SCI_ERROR_OVERRUN ) SciErrorsOverrun ++; |
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| 411 | |
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| 412 | |
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| 413 | // see if it was a transmit interrupt |
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| 414 | |
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| 415 | if ( (*SCSR) & SCI_XMTR_AVAILABLE ) // data reg empty, xmt complete |
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| 416 | { |
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| 417 | SciDisableTransmitInterrupts(); |
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| 418 | |
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| 419 | // tell termios module that the charcter was sent |
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| 420 | // he will call us later to transmit more if there are any |
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| 421 | |
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| 422 | if (rtems_termios_dequeue_characters( SciTermioTty, 1 )) |
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| 423 | { |
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| 424 | // there are more bytes to transmit so enable TX interrupt |
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| 425 | |
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| 426 | SciEnableTransmitInterrupts(); |
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| 427 | } |
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| 428 | } |
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| 429 | |
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| 430 | // see if it was a receive interrupt |
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| 431 | // on the sci uart we just get one character per interrupt |
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| 432 | |
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| 433 | while ( SciCharAvailable() ) // char in data register? |
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| 434 | { |
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| 435 | ch = SciReadCharNoWait(); // get the char from the uart |
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| 436 | |
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| 437 | // IMPORTANT!!! |
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| 438 | // either send it to the termios module or keep it locally |
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| 439 | |
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| 440 | if ( SciOpened == DRIVER_OPENED ) // the driver is open |
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| 441 | { |
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| 442 | SciRcvBufPutChar(ch); // keep it locally |
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| 443 | } |
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| 444 | else // put in termios buffer |
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| 445 | { |
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| 446 | rtems_termios_enqueue_raw_characters( SciTermioTty, &ch, 1 ); |
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| 447 | } |
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| 448 | |
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| 449 | *SCSR &= SCI_CLEAR_RX_INT; // clear the interrupt |
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| 450 | } |
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| 451 | } |
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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 | // SECTION 1 |
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| 457 | // ROUTINES TO MANIPULATE THE CIRCULAR BUFFER |
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| 458 | // |
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| 459 | ///////////////////////////////////////////////////////////////////////////// |
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| 460 | |
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| 461 | |
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| 462 | /**************************************************************************** |
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| 463 | * Func: SciRcvBufGetChar |
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| 464 | * Desc: read a character from the circular buffer |
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| 465 | * make sure there is data before you call this! |
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| 466 | * Inputs: none |
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| 467 | * Outputs: the character or -1 |
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| 468 | * Errors: none |
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| 469 | * Scope: private |
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| 470 | ****************************************************************************/ |
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| 471 | |
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| 472 | static signed8 SciRcvBufGetChar() |
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| 473 | { |
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| 474 | rtems_interrupt_level level; |
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| 475 | unsigned8 ch; |
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| 476 | |
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| 477 | if ( SciRcvBufCount == 0 ) |
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| 478 | { |
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| 479 | rtems_fatal_error_occurred(0xDEAD); // check the count first! |
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| 480 | } |
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| 481 | |
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| 482 | rtems_interrupt_disable( level ); // disable interrupts |
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| 483 | |
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| 484 | ch = SciRcvBuffer[SciRcvBufGetIndex]; // get next byte |
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| 485 | |
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| 486 | SciRcvBufGetIndex++; // bump the index |
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| 487 | |
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| 488 | SciRcvBufGetIndex &= SCI_RCV_BUF_SIZE - 1; // and wrap it |
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| 489 | |
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| 490 | SciRcvBufCount--; // decrement counter |
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| 491 | |
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| 492 | rtems_interrupt_enable( level ); // restore interrupts |
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| 493 | |
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| 494 | return ch; // return the char |
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| 495 | } |
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| 496 | |
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| 497 | |
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| 498 | |
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| 499 | /**************************************************************************** |
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| 500 | * Func: SciRcvBufPutChar |
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| 501 | * Desc: put a character into the rcv data circular buffer |
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| 502 | * Inputs: the character |
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| 503 | * Outputs: none |
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| 504 | * Errors: none |
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| 505 | * Scope: private |
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| 506 | ****************************************************************************/ |
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| 507 | |
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| 508 | static void SciRcvBufPutChar( unsigned8 ch ) |
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| 509 | { |
---|
| 510 | rtems_interrupt_level level; |
---|
| 511 | |
---|
| 512 | if ( SciRcvBufCount == SCI_RCV_BUF_SIZE ) // is there room? |
---|
| 513 | { |
---|
| 514 | return; // no, throw it away |
---|
| 515 | } |
---|
| 516 | |
---|
| 517 | rtems_interrupt_disable( level ); // disable interrupts |
---|
| 518 | |
---|
| 519 | SciRcvBuffer[SciRcvBufPutIndex] = ch; // put it in the buf |
---|
| 520 | |
---|
| 521 | SciRcvBufPutIndex++; // bump the index |
---|
| 522 | |
---|
| 523 | SciRcvBufPutIndex &= SCI_RCV_BUF_SIZE - 1; // and wrap it |
---|
| 524 | |
---|
| 525 | SciRcvBufCount++; // increment counter |
---|
| 526 | |
---|
| 527 | rtems_interrupt_enable( level ); // restore interrupts |
---|
| 528 | |
---|
| 529 | return; // return |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | |
---|
| 533 | /**************************************************************************** |
---|
| 534 | * Func: SciRcvBufFlush |
---|
| 535 | * Desc: completely reset and clear the rcv buffer |
---|
| 536 | * Inputs: none |
---|
| 537 | * Outputs: none |
---|
| 538 | * Errors: none |
---|
| 539 | * Scope: private |
---|
| 540 | ****************************************************************************/ |
---|
| 541 | |
---|
| 542 | #if 0 // prevents compiler warning |
---|
| 543 | static void SciRcvBufFlush( void ) |
---|
| 544 | { |
---|
| 545 | rtems_interrupt_level level; |
---|
| 546 | |
---|
| 547 | rtems_interrupt_disable( level ); // disable interrupts |
---|
| 548 | |
---|
| 549 | memset( SciRcvBuffer, 0, sizeof(SciRcvBuffer) ); |
---|
| 550 | |
---|
| 551 | SciRcvBufPutIndex = 0; // clear |
---|
| 552 | |
---|
| 553 | SciRcvBufGetIndex = 0; // clear |
---|
| 554 | |
---|
| 555 | SciRcvBufCount = 0; // clear |
---|
| 556 | |
---|
| 557 | rtems_interrupt_enable( level ); // restore interrupts |
---|
| 558 | |
---|
| 559 | return; // return |
---|
| 560 | } |
---|
| 561 | #endif |
---|
| 562 | |
---|
| 563 | |
---|
| 564 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 565 | // |
---|
| 566 | // SECTION 2 |
---|
| 567 | // INTERRUPT BASED ENTRY POINTS FOR THE TERMIOS MODULE |
---|
| 568 | // |
---|
| 569 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 570 | |
---|
| 571 | |
---|
| 572 | /**************************************************************************** |
---|
| 573 | * Func: SciInterruptOpen |
---|
| 574 | * Desc: open routine for the interrupt based device driver |
---|
| 575 | * Default state is 9600 baud, 8 bits, No parity, and 1 stop bit. ?? |
---|
[c0c6168] | 576 | **CHANGED** Default baud rate is now 19200, 8N1 |
---|
[274fa77] | 577 | * called from rtems_termios_open which is called from console_open |
---|
| 578 | * Inputs: major - device number |
---|
| 579 | * minor - device number |
---|
| 580 | * args - points to terminal info |
---|
| 581 | * Outputs: success/fail |
---|
| 582 | * Errors: none |
---|
| 583 | * Scope: public API |
---|
| 584 | ****************************************************************************/ |
---|
| 585 | |
---|
| 586 | signed32 SciInterruptOpen( |
---|
| 587 | signed32 major, |
---|
| 588 | signed32 minor, |
---|
| 589 | void *arg |
---|
| 590 | ) |
---|
| 591 | { |
---|
| 592 | rtems_libio_open_close_args_t * args = arg; |
---|
| 593 | rtems_isr_entry old_vector; |
---|
| 594 | |
---|
| 595 | if ( minor != SCI_MINOR ) // check minor device num |
---|
| 596 | { |
---|
| 597 | return -1; |
---|
| 598 | } |
---|
| 599 | |
---|
| 600 | if ( !args ) // must have args |
---|
| 601 | { |
---|
| 602 | return -1; |
---|
| 603 | } |
---|
| 604 | |
---|
| 605 | SciTermioTty = args->iop->data1; // save address of struct |
---|
| 606 | |
---|
| 607 | SciDisableAllInterrupts(); // turn off sci interrupts |
---|
| 608 | |
---|
| 609 | // THIS IS ACTUALLY A BAD THING - SETTING LINE PARAMETERS HERE |
---|
| 610 | // IT SHOULD BE DONE THROUGH TCSETATTR() WHEN THE CONSOLE IS OPENED!!! |
---|
| 611 | |
---|
| 612 | // SciSetBaud(115200); // set the baud rate |
---|
| 613 | // SciSetBaud( 57600); // set the baud rate |
---|
| 614 | // SciSetBaud( 38400); // set the baud rate |
---|
[c0c6168] | 615 | SciSetBaud( 19200); // set the baud rate |
---|
| 616 | // SciSetBaud( 9600); // set the baud rate |
---|
[274fa77] | 617 | |
---|
| 618 | SciSetParity(SCI_PARITY_NONE); // set parity to none |
---|
| 619 | |
---|
| 620 | SciSetDataBits(SCI_8_DATA_BITS); // set data bits to 8 |
---|
| 621 | |
---|
| 622 | |
---|
| 623 | // Install our interrupt handler into RTEMS, where does 66 come from? |
---|
| 624 | |
---|
| 625 | rtems_interrupt_catch( SciIsr, 66, &old_vector ); |
---|
| 626 | |
---|
| 627 | *QIVR = 66; |
---|
| 628 | *QIVR &= 0xf8; |
---|
| 629 | *QILR |= 0x06 & 0x07; |
---|
| 630 | |
---|
| 631 | SciEnableTransmitter(); // enable the transmitter |
---|
| 632 | |
---|
| 633 | SciEnableReceiver(); // enable the receiver |
---|
| 634 | |
---|
| 635 | SciEnableReceiveInterrupts(); // enable rcv interrupts |
---|
| 636 | |
---|
| 637 | return RTEMS_SUCCESSFUL; |
---|
| 638 | } |
---|
| 639 | |
---|
| 640 | |
---|
| 641 | /**************************************************************************** |
---|
| 642 | * Func: SciInterruptClose |
---|
| 643 | * Desc: close routine called by the termios module |
---|
| 644 | * Inputs: major - device number |
---|
| 645 | * minor - device number |
---|
| 646 | * args - unused |
---|
| 647 | * Outputs: success/fail |
---|
| 648 | * Errors: none |
---|
| 649 | * Scope: public - termio entry point |
---|
| 650 | ****************************************************************************/ |
---|
| 651 | |
---|
| 652 | signed32 SciInterruptClose( |
---|
| 653 | signed32 major, |
---|
| 654 | signed32 minor, |
---|
| 655 | void *arg |
---|
| 656 | ) |
---|
| 657 | { |
---|
| 658 | SciDisableAllInterrupts(); |
---|
| 659 | |
---|
| 660 | return RTEMS_SUCCESSFUL; |
---|
| 661 | } |
---|
| 662 | |
---|
| 663 | |
---|
| 664 | /**************************************************************************** |
---|
| 665 | * Func: SciInterruptWrite |
---|
| 666 | * Desc: writes data to the uart using transmit interrupts |
---|
| 667 | * Inputs: minor - device number |
---|
| 668 | * buf - points to the data |
---|
| 669 | * len - number of bytes to send |
---|
| 670 | * Outputs: success/fail |
---|
| 671 | * Errors: none |
---|
| 672 | * Scope: public API |
---|
| 673 | ****************************************************************************/ |
---|
| 674 | |
---|
| 675 | signed32 SciInterruptWrite( |
---|
| 676 | signed32 minor, |
---|
| 677 | const char *buf, |
---|
| 678 | signed32 len |
---|
| 679 | ) |
---|
| 680 | { |
---|
| 681 | // We are using interrupt driven output so termios only sends us |
---|
| 682 | // one character at a time. The sci does not have a fifo. |
---|
| 683 | |
---|
| 684 | if ( !len ) // no data? |
---|
| 685 | { |
---|
| 686 | return 0; // return error |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | if ( minor != SCI_MINOR ) // check the minor dev num |
---|
| 690 | { |
---|
| 691 | return 0; // return error |
---|
| 692 | } |
---|
| 693 | |
---|
| 694 | if ( SciOpened == DRIVER_OPENED ) // is the driver api open? |
---|
| 695 | { |
---|
| 696 | return 1; // yep, throw this away |
---|
| 697 | } |
---|
| 698 | |
---|
| 699 | SciWriteCharNoWait(*buf); // try to send a char |
---|
| 700 | |
---|
| 701 | *SCSR &= SCI_CLEAR_TDRE; // clear tx data reg empty flag |
---|
| 702 | |
---|
| 703 | SciEnableTransmitInterrupts(); // enable the tx interrupt |
---|
| 704 | |
---|
| 705 | return 1; // return success |
---|
| 706 | } |
---|
| 707 | |
---|
| 708 | |
---|
| 709 | /**************************************************************************** |
---|
| 710 | * Func: SciSetAttributes |
---|
| 711 | * Desc: setup the uart based on the termios modules requests |
---|
| 712 | * Inputs: minor - device number |
---|
| 713 | * t - pointer to the termios info struct |
---|
| 714 | * Outputs: none |
---|
| 715 | * Errors: none |
---|
| 716 | * Scope: public API |
---|
| 717 | ****************************************************************************/ |
---|
| 718 | |
---|
| 719 | signed32 SciSetAttributes( |
---|
| 720 | signed32 minor, |
---|
| 721 | const struct termios *t |
---|
| 722 | ) |
---|
| 723 | { |
---|
| 724 | unsigned32 baud_requested; |
---|
| 725 | unsigned32 sci_rate = 0; |
---|
| 726 | unsigned16 sci_parity = 0; |
---|
| 727 | unsigned16 sci_databits = 0; |
---|
| 728 | |
---|
| 729 | if ( minor != SCI_MINOR ) // check the minor dev num |
---|
| 730 | { |
---|
| 731 | return -1; // return error |
---|
| 732 | } |
---|
| 733 | |
---|
| 734 | // if you look closely you will see this is the only thing we use |
---|
| 735 | // set the baud rate |
---|
| 736 | |
---|
| 737 | baud_requested = t->c_cflag & CBAUD; // baud rate |
---|
| 738 | |
---|
| 739 | if (!baud_requested) |
---|
| 740 | { |
---|
[c0c6168] | 741 | // baud_requested = B9600; // default to 9600 baud |
---|
| 742 | baud_requested = B19200; // default to 19200 baud |
---|
[274fa77] | 743 | } |
---|
| 744 | |
---|
| 745 | sci_rate = termios_baud_to_number( baud_requested ); |
---|
| 746 | |
---|
| 747 | // parity error detection |
---|
| 748 | |
---|
| 749 | if (t->c_cflag & PARENB) // enable parity detection? |
---|
| 750 | { |
---|
| 751 | if (t->c_cflag & PARODD) |
---|
| 752 | { |
---|
| 753 | sci_parity = SCI_PARITY_ODD; // select odd parity |
---|
| 754 | } |
---|
| 755 | else |
---|
| 756 | { |
---|
| 757 | sci_parity = SCI_PARITY_EVEN; // select even parity |
---|
| 758 | } |
---|
| 759 | } |
---|
| 760 | else |
---|
| 761 | { |
---|
| 762 | sci_parity = SCI_PARITY_NONE; // no parity, most common |
---|
| 763 | } |
---|
| 764 | |
---|
| 765 | |
---|
| 766 | // set the number of data bits, 8 is most common |
---|
| 767 | |
---|
| 768 | if (t->c_cflag & CSIZE) // was it specified? |
---|
| 769 | { |
---|
| 770 | switch (t->c_cflag & CSIZE) |
---|
| 771 | { |
---|
| 772 | case CS8: sci_databits = SCI_8_DATA_BITS; break; |
---|
| 773 | default : sci_databits = SCI_9_DATA_BITS; break; |
---|
| 774 | } |
---|
| 775 | } |
---|
| 776 | else |
---|
| 777 | { |
---|
| 778 | sci_databits = SCI_8_DATA_BITS; // default to 8 data bits |
---|
| 779 | } |
---|
| 780 | |
---|
| 781 | |
---|
| 782 | // the number of stop bits; always 1 for SCI |
---|
| 783 | |
---|
| 784 | if (t->c_cflag & CSTOPB) |
---|
| 785 | { |
---|
| 786 | // do nothing |
---|
| 787 | } |
---|
| 788 | |
---|
| 789 | |
---|
| 790 | // setup the hardware with these serial port parameters |
---|
| 791 | |
---|
| 792 | SciSetBaud(sci_rate); // set the baud rate |
---|
| 793 | |
---|
| 794 | SciSetParity(sci_parity); // set the parity type |
---|
| 795 | |
---|
| 796 | SciSetDataBits(sci_databits); // set the data bits |
---|
| 797 | |
---|
| 798 | |
---|
| 799 | return RTEMS_SUCCESSFUL; |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | |
---|
| 803 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 804 | // |
---|
| 805 | // SECTION 3 |
---|
| 806 | // POLLING BASED ENTRY POINTS FOR THE TERMIOS MODULE |
---|
| 807 | // |
---|
| 808 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 809 | |
---|
| 810 | /**************************************************************************** |
---|
| 811 | * Func: SciPolledOpen |
---|
| 812 | * Desc: open routine for the polled i/o version of the driver |
---|
| 813 | * called from rtems_termios_open which is called from console_open |
---|
| 814 | * Inputs: major - device number |
---|
| 815 | * minor - device number |
---|
| 816 | * args - points to terminal info struct |
---|
| 817 | * Outputs: success/fail |
---|
| 818 | * Errors: none |
---|
| 819 | * Scope: public - termios entry point |
---|
| 820 | ****************************************************************************/ |
---|
| 821 | |
---|
| 822 | signed32 SciPolledOpen( |
---|
| 823 | signed32 major, |
---|
| 824 | signed32 minor, |
---|
| 825 | void *arg |
---|
| 826 | ) |
---|
| 827 | { |
---|
| 828 | rtems_libio_open_close_args_t * args = arg; |
---|
| 829 | |
---|
| 830 | if ( minor != SCI_MINOR ) // check minor device num |
---|
| 831 | { |
---|
| 832 | return -1; |
---|
| 833 | } |
---|
| 834 | |
---|
| 835 | if ( !args ) // must have args |
---|
| 836 | { |
---|
| 837 | return -1; |
---|
| 838 | } |
---|
| 839 | |
---|
| 840 | SciTermioTty = args->iop->data1; // Store tty pointer |
---|
| 841 | |
---|
| 842 | SciDisableAllInterrupts(); // don't generate interrupts |
---|
| 843 | |
---|
| 844 | // THIS IS ACTUALLY A BAD THING - SETTING LINE PARAMETERS HERE |
---|
| 845 | // IT SHOULD BE DONE THROUGH TCSETATTR() WHEN THE CONSOLE IS OPENED!!! |
---|
| 846 | |
---|
| 847 | // SciSetBaud(115200); // set the baud rate |
---|
| 848 | // SciSetBaud( 57600); // set the baud rate |
---|
| 849 | // SciSetBaud( 38400); // set the baud rate |
---|
[c0c6168] | 850 | SciSetBaud( 19200); // set the baud rate |
---|
| 851 | // SciSetBaud( 9600); // set the baud rate |
---|
[274fa77] | 852 | |
---|
| 853 | SciSetParity(SCI_PARITY_NONE); // set no parity |
---|
| 854 | |
---|
| 855 | SciSetDataBits(SCI_8_DATA_BITS); // set 8 data bits |
---|
| 856 | |
---|
| 857 | SciEnableTransmitter(); // enable the xmitter |
---|
| 858 | |
---|
| 859 | SciEnableReceiver(); // enable the rcvr |
---|
| 860 | |
---|
| 861 | return RTEMS_SUCCESSFUL; |
---|
| 862 | } |
---|
| 863 | |
---|
| 864 | |
---|
| 865 | /**************************************************************************** |
---|
| 866 | * Func: SciPolledClose |
---|
| 867 | * Desc: close routine for the device driver, same for both |
---|
| 868 | * Inputs: major - device number |
---|
| 869 | * minor - device number |
---|
| 870 | * args - unused |
---|
| 871 | * Outputs: success/fail |
---|
| 872 | * Errors: none |
---|
| 873 | * Scope: public termios API |
---|
| 874 | ****************************************************************************/ |
---|
| 875 | |
---|
| 876 | signed32 SciPolledClose( |
---|
| 877 | signed32 major, |
---|
| 878 | signed32 minor, |
---|
| 879 | void *arg |
---|
| 880 | ) |
---|
| 881 | { |
---|
| 882 | SciDisableAllInterrupts(); |
---|
| 883 | |
---|
| 884 | return RTEMS_SUCCESSFUL; |
---|
| 885 | } |
---|
| 886 | |
---|
| 887 | |
---|
| 888 | /**************************************************************************** |
---|
| 889 | * Func: SciPolledRead |
---|
| 890 | * Desc: polling based read routine for the uart |
---|
| 891 | * Inputs: minor - device number |
---|
| 892 | * Outputs: error or the character read |
---|
| 893 | * Errors: none |
---|
| 894 | * Scope: public API |
---|
| 895 | ****************************************************************************/ |
---|
| 896 | |
---|
| 897 | signed32 SciPolledRead( |
---|
| 898 | signed32 minor |
---|
| 899 | ) |
---|
| 900 | { |
---|
| 901 | if ( minor != SCI_MINOR ) // check the minor dev num |
---|
| 902 | { |
---|
| 903 | return -1; // return error |
---|
| 904 | } |
---|
| 905 | |
---|
| 906 | if ( SciCharAvailable() ) // if a char is available |
---|
| 907 | { |
---|
| 908 | return SciReadCharNoWait(); // read the rx data register |
---|
| 909 | } |
---|
| 910 | |
---|
| 911 | return -1; // return error |
---|
| 912 | } |
---|
| 913 | |
---|
| 914 | |
---|
| 915 | /**************************************************************************** |
---|
| 916 | * Func: SciPolledWrite |
---|
| 917 | * Desc: writes out characters in polled mode, waiting for the uart |
---|
| 918 | * check in console_open, but we only seem to use interrupt mode |
---|
| 919 | * Inputs: minor - device number |
---|
| 920 | * buf - points to the data |
---|
| 921 | * len - how many bytes |
---|
| 922 | * Outputs: error or number of bytes written |
---|
| 923 | * Errors: none |
---|
| 924 | * Scope: public termios API |
---|
| 925 | ****************************************************************************/ |
---|
| 926 | |
---|
| 927 | signed32 SciPolledWrite( |
---|
| 928 | signed32 minor, |
---|
| 929 | const char *buf, |
---|
| 930 | signed32 len |
---|
| 931 | ) |
---|
| 932 | { |
---|
| 933 | signed32 written = 0; |
---|
| 934 | |
---|
| 935 | if ( minor != SCI_MINOR ) // check minor device num |
---|
| 936 | { |
---|
| 937 | return -1; |
---|
| 938 | } |
---|
| 939 | |
---|
| 940 | if ( SciOpened == DRIVER_OPENED ) // is the driver api open? |
---|
| 941 | { |
---|
| 942 | return -1; // toss the data |
---|
| 943 | } |
---|
| 944 | |
---|
| 945 | // send each byte in the string out the port |
---|
| 946 | |
---|
| 947 | while ( written < len ) |
---|
| 948 | { |
---|
| 949 | SciWriteCharWait(*buf++); // send a byte |
---|
| 950 | |
---|
| 951 | written++; // increment counter |
---|
| 952 | } |
---|
| 953 | |
---|
| 954 | return written; // return count |
---|
| 955 | } |
---|
| 956 | |
---|
| 957 | |
---|
| 958 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 959 | // |
---|
| 960 | // SECTION 4 |
---|
| 961 | // DEVICE DRIVER PUBLIC API ENTRY POINTS |
---|
| 962 | // |
---|
| 963 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 964 | |
---|
| 965 | |
---|
| 966 | /**************************************************************************** |
---|
| 967 | * Func: SciInit |
---|
| 968 | * Desc: Initialize the lasers device driver and hardware |
---|
| 969 | * Inputs: major - the major device number which is assigned by rtems |
---|
| 970 | * minor - the minor device number which is undefined at this point |
---|
| 971 | * arg - ????? |
---|
| 972 | * Outputs: RTEMS_SUCCESSFUL |
---|
| 973 | * Errors: None. |
---|
| 974 | * Scope: public API |
---|
| 975 | ****************************************************************************/ |
---|
| 976 | |
---|
| 977 | rtems_device_driver SciInitialize ( |
---|
| 978 | rtems_device_major_number major, |
---|
| 979 | rtems_device_minor_number minor, |
---|
| 980 | void * arg |
---|
| 981 | ) |
---|
| 982 | { |
---|
[0b6d74d0] | 983 | // rtems_status_code status; |
---|
[274fa77] | 984 | |
---|
| 985 | //printk("%s\r\n", __FUNCTION__); |
---|
| 986 | |
---|
| 987 | |
---|
| 988 | // register the SCI device name for termios console i/o |
---|
| 989 | // this is done over in console.c which doesn't seem exactly right |
---|
| 990 | // but there were problems doing it here... |
---|
| 991 | |
---|
| 992 | // status = rtems_io_register_name( "/dev/sci", major, 0 ); |
---|
| 993 | |
---|
| 994 | // if (status != RTEMS_SUCCESSFUL) |
---|
| 995 | // rtems_fatal_error_occurred(status); |
---|
| 996 | |
---|
| 997 | |
---|
| 998 | SciMajor = major; // save the rtems major number |
---|
| 999 | |
---|
| 1000 | SciOpened = DRIVER_CLOSED; // initial state is closed |
---|
| 1001 | |
---|
| 1002 | |
---|
| 1003 | // if you have an interrupt handler, install it here |
---|
| 1004 | |
---|
| 1005 | |
---|
| 1006 | SciInited = 1; // set the inited flag |
---|
| 1007 | |
---|
| 1008 | return RTEMS_SUCCESSFUL; |
---|
| 1009 | } |
---|
| 1010 | |
---|
| 1011 | |
---|
| 1012 | /**************************************************************************** |
---|
| 1013 | * Func: SciOpen |
---|
| 1014 | * Desc: device driver open routine |
---|
| 1015 | * you must open a device before you can anything else |
---|
| 1016 | * only one process can have the device opened at a time |
---|
| 1017 | * you could look at the task id to restrict access if you want |
---|
| 1018 | * Inputs: major - the major device number assigned by rtems |
---|
| 1019 | * minor - the minor device number assigned by us |
---|
| 1020 | * arg - ????? |
---|
| 1021 | * Outputs: see below |
---|
| 1022 | * Errors: none |
---|
| 1023 | * Scope: public API |
---|
| 1024 | ****************************************************************************/ |
---|
| 1025 | |
---|
| 1026 | rtems_device_driver SciOpen ( |
---|
| 1027 | rtems_device_major_number major, |
---|
| 1028 | rtems_device_minor_number minor, |
---|
| 1029 | void * arg |
---|
| 1030 | ) |
---|
| 1031 | { |
---|
| 1032 | //printk("%s major=%d minor=%d\r\n", __FUNCTION__,major,minor); |
---|
| 1033 | |
---|
| 1034 | if (SciInited == 0) // must be initialized first! |
---|
| 1035 | { |
---|
| 1036 | return RTEMS_NOT_CONFIGURED; |
---|
| 1037 | } |
---|
| 1038 | |
---|
| 1039 | if (minor != SCI_MINOR) |
---|
| 1040 | { |
---|
| 1041 | return RTEMS_INVALID_NAME; // verify minor number |
---|
| 1042 | } |
---|
| 1043 | |
---|
| 1044 | if (SciOpened == DRIVER_OPENED) |
---|
| 1045 | { |
---|
| 1046 | return RTEMS_RESOURCE_IN_USE; // already opened! |
---|
| 1047 | } |
---|
| 1048 | |
---|
| 1049 | SciOpened = DRIVER_OPENED; // set the opened flag |
---|
| 1050 | |
---|
| 1051 | return RTEMS_SUCCESSFUL; |
---|
| 1052 | } |
---|
| 1053 | |
---|
| 1054 | |
---|
| 1055 | /**************************************************************************** |
---|
| 1056 | * Func: SciClose |
---|
| 1057 | * Desc: device driver close routine |
---|
| 1058 | * the device must be opened before you can close it |
---|
| 1059 | * the device must be closed before someone (else) can open it |
---|
| 1060 | * Inputs: major - the major device number |
---|
| 1061 | * minor - the minor device number |
---|
| 1062 | * arg - ????? |
---|
| 1063 | * Outputs: see below |
---|
| 1064 | * Errors: none |
---|
| 1065 | * Scope: public API |
---|
| 1066 | ****************************************************************************/ |
---|
| 1067 | |
---|
| 1068 | rtems_device_driver SciClose ( |
---|
| 1069 | rtems_device_major_number major, |
---|
| 1070 | rtems_device_minor_number minor, |
---|
| 1071 | void * arg |
---|
| 1072 | ) |
---|
| 1073 | { |
---|
| 1074 | //printk("%s major=%d minor=%d\r\n", __FUNCTION__,major,minor); |
---|
| 1075 | |
---|
| 1076 | if (minor != SCI_MINOR) |
---|
| 1077 | { |
---|
| 1078 | return RTEMS_INVALID_NAME; // check the minor number |
---|
| 1079 | } |
---|
| 1080 | |
---|
| 1081 | if (SciOpened != DRIVER_OPENED) |
---|
| 1082 | { |
---|
| 1083 | return RTEMS_INCORRECT_STATE; // must be opened first |
---|
| 1084 | } |
---|
| 1085 | |
---|
| 1086 | SciOpened = DRIVER_CLOSED; // set the flag |
---|
| 1087 | |
---|
| 1088 | return RTEMS_SUCCESSFUL; |
---|
| 1089 | } |
---|
| 1090 | |
---|
| 1091 | |
---|
| 1092 | /**************************************************************************** |
---|
| 1093 | * Func: SciRead |
---|
| 1094 | * Desc: device driver read routine |
---|
| 1095 | * this function is not meaningful for the laser devices |
---|
| 1096 | * Inputs: major - the major device number |
---|
| 1097 | * minor - the minor device number |
---|
| 1098 | * arg - read/write arguments |
---|
| 1099 | * Outputs: see below |
---|
| 1100 | * Errors: none |
---|
| 1101 | * Scope: public API |
---|
| 1102 | ****************************************************************************/ |
---|
| 1103 | |
---|
| 1104 | rtems_device_driver SciRead ( |
---|
| 1105 | rtems_device_major_number major, |
---|
| 1106 | rtems_device_minor_number minor, |
---|
| 1107 | void *arg |
---|
| 1108 | ) |
---|
| 1109 | { |
---|
| 1110 | rtems_libio_rw_args_t *rw_args; // ptr to argument struct |
---|
| 1111 | unsigned8 *buffer; |
---|
| 1112 | unsigned16 length; |
---|
| 1113 | |
---|
| 1114 | rw_args = (rtems_libio_rw_args_t *) arg; // arguments to read() |
---|
| 1115 | |
---|
| 1116 | |
---|
| 1117 | if (minor != SCI_MINOR) |
---|
| 1118 | { |
---|
| 1119 | return RTEMS_INVALID_NAME; // check the minor number |
---|
| 1120 | } |
---|
| 1121 | |
---|
| 1122 | if (SciOpened == DRIVER_CLOSED) |
---|
| 1123 | { |
---|
| 1124 | return RTEMS_INCORRECT_STATE; // must be opened first |
---|
| 1125 | } |
---|
| 1126 | |
---|
| 1127 | buffer = rw_args->buffer; // points to user's buffer |
---|
| 1128 | |
---|
| 1129 | length = rw_args->count; // how many bytes they want |
---|
| 1130 | |
---|
| 1131 | // *buffer = SciReadCharWait(); // wait for a character |
---|
| 1132 | |
---|
| 1133 | // if there isn't a character available, wait until one shows up |
---|
| 1134 | // or the timeout period expires, which ever happens first |
---|
| 1135 | |
---|
| 1136 | if ( SciRcvBufCount == 0 ) // no chars |
---|
| 1137 | { |
---|
| 1138 | // wait for someone to wake me up... |
---|
| 1139 | //rtems_task_wake_after(SciReadTimeout); |
---|
| 1140 | } |
---|
| 1141 | |
---|
| 1142 | if ( SciRcvBufCount ) // any characters locally? |
---|
| 1143 | { |
---|
| 1144 | *buffer = SciRcvBufGetChar(); // get the character |
---|
| 1145 | |
---|
| 1146 | rw_args->bytes_moved = 1; // how many we actually read |
---|
| 1147 | } |
---|
| 1148 | |
---|
| 1149 | return RTEMS_SUCCESSFUL; |
---|
| 1150 | } |
---|
| 1151 | |
---|
| 1152 | |
---|
| 1153 | /**************************************************************************** |
---|
| 1154 | * Func: SciWrite |
---|
| 1155 | * Desc: device driver write routine |
---|
| 1156 | * this function is not meaningful for the laser devices |
---|
| 1157 | * Inputs: major - the major device number |
---|
| 1158 | * minor - the minor device number |
---|
| 1159 | * arg - read/write arguments |
---|
| 1160 | * Outputs: see below |
---|
| 1161 | * Errors: non3 |
---|
| 1162 | * Scope: public API |
---|
| 1163 | ****************************************************************************/ |
---|
| 1164 | |
---|
| 1165 | rtems_device_driver SciWrite ( |
---|
| 1166 | rtems_device_major_number major, |
---|
| 1167 | rtems_device_minor_number minor, |
---|
| 1168 | void * arg |
---|
| 1169 | ) |
---|
| 1170 | { |
---|
| 1171 | rtems_libio_rw_args_t *rw_args; // ptr to argument struct |
---|
| 1172 | unsigned8 *buffer; |
---|
| 1173 | unsigned16 length; |
---|
| 1174 | |
---|
| 1175 | rw_args = (rtems_libio_rw_args_t *) arg; |
---|
| 1176 | |
---|
| 1177 | if (minor != SCI_MINOR) |
---|
| 1178 | { |
---|
| 1179 | return RTEMS_INVALID_NAME; // check the minor number |
---|
| 1180 | } |
---|
| 1181 | |
---|
| 1182 | if (SciOpened == DRIVER_CLOSED) |
---|
| 1183 | { |
---|
| 1184 | return RTEMS_INCORRECT_STATE; // must be opened first |
---|
| 1185 | } |
---|
| 1186 | |
---|
| 1187 | buffer = (unsigned8*)rw_args->buffer; // points to data |
---|
| 1188 | |
---|
| 1189 | length = rw_args->count; // how many bytes |
---|
| 1190 | |
---|
| 1191 | while (length--) |
---|
| 1192 | { |
---|
| 1193 | SciWriteCharWait(*buffer++); // send the bytes out |
---|
| 1194 | } |
---|
| 1195 | |
---|
| 1196 | rw_args->bytes_moved = rw_args->count; // how many we wrote |
---|
| 1197 | |
---|
| 1198 | return RTEMS_SUCCESSFUL; |
---|
| 1199 | } |
---|
| 1200 | |
---|
| 1201 | |
---|
| 1202 | /**************************************************************************** |
---|
| 1203 | * Func: SciControl |
---|
| 1204 | * Desc: device driver control routine |
---|
| 1205 | * see below for an example of how to use the ioctl interface |
---|
| 1206 | * Inputs: major - the major device number |
---|
| 1207 | * minor - the minor device number |
---|
| 1208 | * arg - io control args |
---|
| 1209 | * Outputs: see below |
---|
| 1210 | * Errors: none |
---|
| 1211 | * Scope: public API |
---|
| 1212 | ****************************************************************************/ |
---|
| 1213 | |
---|
| 1214 | rtems_device_driver SciControl ( |
---|
| 1215 | rtems_device_major_number major, |
---|
| 1216 | rtems_device_minor_number minor, |
---|
| 1217 | void * arg |
---|
| 1218 | ) |
---|
| 1219 | { |
---|
| 1220 | rtems_libio_ioctl_args_t *args = arg; // rtems arg struct |
---|
| 1221 | unsigned16 command; // the cmd to execute |
---|
| 1222 | unsigned16 unused; // maybe later |
---|
| 1223 | unsigned16 *ptr; // ptr to user data |
---|
| 1224 | |
---|
| 1225 | //printk("%s major=%d minor=%d\r\n", __FUNCTION__,major,minor); |
---|
| 1226 | |
---|
| 1227 | // do some sanity checking |
---|
| 1228 | |
---|
| 1229 | if (minor != SCI_MINOR) |
---|
| 1230 | { |
---|
| 1231 | return RTEMS_INVALID_NAME; // check the minor number |
---|
| 1232 | } |
---|
| 1233 | |
---|
| 1234 | if (SciOpened == DRIVER_CLOSED) |
---|
| 1235 | { |
---|
| 1236 | return RTEMS_INCORRECT_STATE; // must be open first |
---|
| 1237 | } |
---|
| 1238 | |
---|
| 1239 | if (args == 0) |
---|
| 1240 | { |
---|
| 1241 | return RTEMS_INVALID_ADDRESS; // must have args |
---|
| 1242 | } |
---|
| 1243 | |
---|
| 1244 | args->ioctl_return = -1; // assume an error |
---|
| 1245 | |
---|
| 1246 | command = args->command; // get the command |
---|
| 1247 | ptr = args->buffer; // this is an address |
---|
| 1248 | unused = *ptr; // brightness |
---|
| 1249 | |
---|
| 1250 | if (command == SCI_SEND_BREAK) // process the command |
---|
| 1251 | { |
---|
| 1252 | SciSendBreak(); // send break char |
---|
| 1253 | } |
---|
| 1254 | |
---|
| 1255 | args->ioctl_return = 0; // return status |
---|
| 1256 | |
---|
| 1257 | return RTEMS_SUCCESSFUL; |
---|
| 1258 | } |
---|
| 1259 | |
---|
| 1260 | |
---|
| 1261 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 1262 | // |
---|
| 1263 | // SECTION 5 |
---|
| 1264 | // HARDWARE LEVEL ROUTINES |
---|
| 1265 | // |
---|
| 1266 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 1267 | |
---|
| 1268 | |
---|
| 1269 | /**************************************************************************** |
---|
| 1270 | * Func: SciSetBaud |
---|
| 1271 | * Desc: setup the uart based on the termios modules requests |
---|
| 1272 | * Inputs: baud rate |
---|
| 1273 | * Outputs: none |
---|
| 1274 | * Errors: none |
---|
| 1275 | * Scope: private |
---|
| 1276 | ****************************************************************************/ |
---|
| 1277 | |
---|
| 1278 | static void SciSetBaud(unsigned32 rate) |
---|
| 1279 | { |
---|
| 1280 | unsigned16 value; |
---|
| 1281 | unsigned16 save_sccr1; |
---|
| 1282 | |
---|
| 1283 | // when you open the console you need to set the termio struct baud rate |
---|
| 1284 | // it has a default value of 9600, when someone calls tcsetattr it reverts! |
---|
| 1285 | |
---|
| 1286 | |
---|
| 1287 | SciBaud = rate; // save the rate |
---|
| 1288 | |
---|
| 1289 | // calculate the register value as a float and convert to an int |
---|
| 1290 | // set baud rate - you must define the system clock constant |
---|
[b8490b9] | 1291 | // see mrm332.h for an example |
---|
[274fa77] | 1292 | |
---|
| 1293 | value = ( (unsigned16) ( SYS_CLOCK / rate / 32.0 + 0.5 ) & 0x1fff ); |
---|
| 1294 | |
---|
| 1295 | save_sccr1 = *SCCR1; // save register |
---|
| 1296 | |
---|
| 1297 | // also turns off the xmtr and rcvr |
---|
| 1298 | |
---|
| 1299 | *SCCR1 &= SCI_DISABLE_INT_ALL; // disable interrupts |
---|
| 1300 | |
---|
| 1301 | *SCCR0 = value; // write the register |
---|
| 1302 | |
---|
| 1303 | *SCCR1 = save_sccr1; // restore register |
---|
| 1304 | |
---|
| 1305 | return; |
---|
| 1306 | } |
---|
| 1307 | |
---|
| 1308 | |
---|
| 1309 | /**************************************************************************** |
---|
| 1310 | * Func: SciSetParity |
---|
| 1311 | * Desc: setup the uart based on the termios modules requests |
---|
| 1312 | * Inputs: parity |
---|
| 1313 | * Outputs: none |
---|
| 1314 | * Errors: none |
---|
| 1315 | * Scope: private |
---|
| 1316 | ****************************************************************************/ |
---|
| 1317 | |
---|
| 1318 | static void SciSetParity(unsigned16 parity) |
---|
| 1319 | { |
---|
| 1320 | unsigned16 value; |
---|
| 1321 | |
---|
| 1322 | value = *SCCR1; // get the register |
---|
| 1323 | |
---|
| 1324 | if (parity == SCI_PARITY_ODD) |
---|
| 1325 | { |
---|
| 1326 | value |= SCI_PARITY_ENABLE; // parity enabled |
---|
| 1327 | value |= SCI_PARITY_ODD; // parity odd |
---|
| 1328 | } |
---|
| 1329 | |
---|
| 1330 | else if (parity == SCI_PARITY_EVEN) |
---|
| 1331 | { |
---|
| 1332 | value |= SCI_PARITY_ENABLE; // parity enabled |
---|
| 1333 | value &= ~SCI_PARITY_ODD; // parity even |
---|
| 1334 | } |
---|
| 1335 | |
---|
| 1336 | else if (parity == SCI_PARITY_NONE) |
---|
| 1337 | { |
---|
| 1338 | value &= ~SCI_PARITY_ENABLE; // disabled, most common |
---|
| 1339 | } |
---|
| 1340 | |
---|
| 1341 | /* else no changes */ |
---|
| 1342 | |
---|
| 1343 | *SCCR1 = value; // write the register |
---|
| 1344 | |
---|
| 1345 | return; |
---|
| 1346 | } |
---|
| 1347 | |
---|
| 1348 | |
---|
| 1349 | /**************************************************************************** |
---|
| 1350 | * Func: SciSetDataBits |
---|
| 1351 | * Desc: setup the uart based on the termios modules requests |
---|
| 1352 | * Inputs: data bits |
---|
| 1353 | * Outputs: none |
---|
| 1354 | * Errors: none |
---|
| 1355 | * Scope: private |
---|
| 1356 | ****************************************************************************/ |
---|
| 1357 | |
---|
| 1358 | static void SciSetDataBits(unsigned16 bits) |
---|
| 1359 | { |
---|
| 1360 | unsigned16 value; |
---|
| 1361 | |
---|
| 1362 | value = *SCCR1; // get the register |
---|
| 1363 | |
---|
| 1364 | /* note - the parity setting affects the number of data bits */ |
---|
| 1365 | |
---|
| 1366 | if (bits == SCI_9_DATA_BITS) |
---|
| 1367 | { |
---|
| 1368 | value |= SCI_9_DATA_BITS; // 9 data bits |
---|
| 1369 | } |
---|
| 1370 | |
---|
| 1371 | else if (bits == SCI_8_DATA_BITS) |
---|
| 1372 | { |
---|
| 1373 | value &= SCI_8_DATA_BITS; // 8 data bits |
---|
| 1374 | } |
---|
| 1375 | |
---|
| 1376 | /* else no changes */ |
---|
| 1377 | |
---|
| 1378 | *SCCR1 = value; // write the register |
---|
| 1379 | |
---|
| 1380 | return; |
---|
| 1381 | } |
---|
| 1382 | |
---|
| 1383 | |
---|
| 1384 | /**************************************************************************** |
---|
| 1385 | * Func: SciDisableAllInterrupts |
---|
| 1386 | * Func: SciEnableTransmitInterrupts |
---|
| 1387 | * Func: SciEnableReceiveInterrupts |
---|
| 1388 | * Desc: handles generation of interrupts by the sci module |
---|
| 1389 | * Inputs: none |
---|
| 1390 | * Outputs: none |
---|
| 1391 | * Errors: none |
---|
| 1392 | * Scope: private |
---|
| 1393 | ****************************************************************************/ |
---|
| 1394 | |
---|
| 1395 | static void inline SciDisableAllInterrupts( void ) |
---|
| 1396 | { |
---|
| 1397 | // this also turns off the xmtr and rcvr |
---|
| 1398 | |
---|
| 1399 | *SCCR1 &= SCI_DISABLE_INT_ALL; |
---|
| 1400 | } |
---|
| 1401 | |
---|
| 1402 | static void inline SciEnableReceiveInterrupts( void ) |
---|
| 1403 | { |
---|
| 1404 | *SCCR1 |= SCI_ENABLE_INT_RX; |
---|
| 1405 | } |
---|
| 1406 | |
---|
| 1407 | static void inline SciDisableReceiveInterrupts( void ) |
---|
| 1408 | { |
---|
| 1409 | *SCCR1 &= SCI_DISABLE_INT_RX; |
---|
| 1410 | } |
---|
| 1411 | |
---|
| 1412 | static void inline SciEnableTransmitInterrupts( void ) |
---|
| 1413 | { |
---|
| 1414 | *SCCR1 |= SCI_ENABLE_INT_TX; |
---|
| 1415 | } |
---|
| 1416 | |
---|
| 1417 | static void inline SciDisableTransmitInterrupts( void ) |
---|
| 1418 | { |
---|
| 1419 | *SCCR1 &= SCI_DISABLE_INT_TX; |
---|
| 1420 | } |
---|
| 1421 | |
---|
| 1422 | |
---|
| 1423 | /**************************************************************************** |
---|
| 1424 | * Func: SciEnableTransmitter, SciDisableTransmitter |
---|
| 1425 | * Func: SciEnableReceiver, SciDisableReceiver |
---|
| 1426 | * Desc: turns the transmitter and receiver on and off |
---|
| 1427 | * Inputs: none |
---|
| 1428 | * Outputs: none |
---|
| 1429 | * Errors: none |
---|
| 1430 | * Scope: private |
---|
| 1431 | ****************************************************************************/ |
---|
| 1432 | |
---|
| 1433 | static void inline SciEnableTransmitter( void ) |
---|
| 1434 | { |
---|
| 1435 | *SCCR1 |= SCI_ENABLE_XMTR; |
---|
| 1436 | } |
---|
| 1437 | |
---|
| 1438 | static void inline SciDisableTransmitter( void ) |
---|
| 1439 | { |
---|
| 1440 | *SCCR1 &= SCI_DISABLE_XMTR; |
---|
| 1441 | } |
---|
| 1442 | |
---|
| 1443 | static void inline SciEnableReceiver( void ) |
---|
| 1444 | { |
---|
| 1445 | *SCCR1 |= SCI_ENABLE_RCVR; |
---|
| 1446 | } |
---|
| 1447 | |
---|
| 1448 | static void inline SciDisableReceiver( void ) |
---|
| 1449 | { |
---|
| 1450 | *SCCR1 &= SCI_DISABLE_RCVR; |
---|
| 1451 | } |
---|
| 1452 | |
---|
| 1453 | |
---|
| 1454 | /**************************************************************************** |
---|
| 1455 | * Func: SciWriteCharWait |
---|
| 1456 | * Desc: wait for room in the fifo and then put a char in |
---|
| 1457 | * Inputs: a byte to send |
---|
| 1458 | * Outputs: none |
---|
| 1459 | * Errors: none |
---|
| 1460 | * Scope: public |
---|
| 1461 | ****************************************************************************/ |
---|
| 1462 | |
---|
| 1463 | void SciWriteCharWait(unsigned8 c) |
---|
| 1464 | { |
---|
| 1465 | // poll the fifo, waiting for room for another character |
---|
| 1466 | |
---|
| 1467 | while ( ( *SCSR & SCI_XMTR_AVAILABLE ) == 0 ) |
---|
| 1468 | { |
---|
| 1469 | /* Either we are writing to the fifo faster than |
---|
| 1470 | * the uart can clock bytes out onto the cable, |
---|
| 1471 | * or we are in flow control (actually no, we |
---|
| 1472 | * are ignoring flow control from the other end). |
---|
| 1473 | * In the first case, higher baud rates will help. |
---|
| 1474 | */ |
---|
[c0c6168] | 1475 | /* relinquish processor while waiting */ |
---|
| 1476 | rtems_task_wake_after(RTEMS_YIELD_PROCESSOR); |
---|
[274fa77] | 1477 | } |
---|
| 1478 | |
---|
| 1479 | *SCDR = c; // send the charcter |
---|
| 1480 | |
---|
| 1481 | SciBytesOut++; // increment the counter |
---|
| 1482 | |
---|
| 1483 | return; |
---|
| 1484 | } |
---|
| 1485 | |
---|
| 1486 | |
---|
| 1487 | /**************************************************************************** |
---|
| 1488 | * Func: SciWriteCharNoWait |
---|
| 1489 | * Desc: if no room in the fifo throw the char on the floor |
---|
| 1490 | * Inputs: a byte to send |
---|
| 1491 | * Outputs: none |
---|
| 1492 | * Errors: none |
---|
| 1493 | * Scope: public |
---|
| 1494 | ****************************************************************************/ |
---|
| 1495 | |
---|
| 1496 | void SciWriteCharNoWait(unsigned8 c) |
---|
| 1497 | { |
---|
| 1498 | if ( ( *SCSR & SCI_XMTR_AVAILABLE ) == 0 ) |
---|
| 1499 | { |
---|
| 1500 | return; // no room, throw it away |
---|
| 1501 | } |
---|
| 1502 | |
---|
| 1503 | *SCDR = c; // put the char in the fifo |
---|
| 1504 | |
---|
| 1505 | SciBytesOut++; // increment the counter |
---|
| 1506 | |
---|
| 1507 | return; |
---|
| 1508 | } |
---|
| 1509 | |
---|
| 1510 | |
---|
| 1511 | /**************************************************************************** |
---|
| 1512 | * Func: SciReadCharWait |
---|
| 1513 | * Desc: read a character, waiting for one to show up, if need be |
---|
| 1514 | * Inputs: none |
---|
| 1515 | * Outputs: a character |
---|
| 1516 | * Errors: none |
---|
| 1517 | * Scope: public |
---|
| 1518 | ****************************************************************************/ |
---|
| 1519 | |
---|
| 1520 | unsigned8 inline SciReadCharWait( void ) |
---|
| 1521 | { |
---|
| 1522 | unsigned8 ch; |
---|
| 1523 | |
---|
| 1524 | while ( SciCharAvailable() == 0 ) // anything there? |
---|
| 1525 | { |
---|
[c0c6168] | 1526 | /* relinquish processor while waiting */ |
---|
| 1527 | rtems_task_wake_after(RTEMS_YIELD_PROCESSOR); |
---|
[274fa77] | 1528 | } |
---|
| 1529 | |
---|
| 1530 | // if you have rcv ints enabled, then the isr will probably |
---|
| 1531 | // get the character before you will unless you turn off ints |
---|
| 1532 | // ie polling and ints don't mix that well |
---|
| 1533 | |
---|
| 1534 | ch = *SCDR; // get the charcter |
---|
| 1535 | |
---|
| 1536 | SciBytesIn++; // increment the counter |
---|
| 1537 | |
---|
| 1538 | return ch; // return the char |
---|
| 1539 | } |
---|
| 1540 | |
---|
| 1541 | |
---|
| 1542 | /**************************************************************************** |
---|
| 1543 | * Func: SciReadCharNoWait |
---|
| 1544 | * Desc: try to get a char but dont wait for one |
---|
| 1545 | * Inputs: none |
---|
| 1546 | * Outputs: a character or -1 if none |
---|
| 1547 | * Errors: none |
---|
| 1548 | * Scope: public |
---|
| 1549 | ****************************************************************************/ |
---|
| 1550 | |
---|
| 1551 | unsigned8 inline SciReadCharNoWait( void ) |
---|
| 1552 | { |
---|
| 1553 | unsigned8 ch; |
---|
| 1554 | |
---|
| 1555 | if ( SciCharAvailable() == 0 ) // anything there? |
---|
| 1556 | return -1; |
---|
| 1557 | |
---|
| 1558 | ch = *SCDR; // get the character |
---|
| 1559 | |
---|
| 1560 | SciBytesIn++; // increment the count |
---|
| 1561 | |
---|
| 1562 | return ch; // return the char |
---|
| 1563 | } |
---|
| 1564 | |
---|
| 1565 | |
---|
| 1566 | |
---|
| 1567 | /**************************************************************************** |
---|
| 1568 | * Func: SciCharAvailable |
---|
| 1569 | * Desc: is there a receive character in the data register |
---|
| 1570 | * Inputs: none |
---|
| 1571 | * Outputs: false if no char available, else true |
---|
| 1572 | * Errors: none |
---|
| 1573 | * Scope: public |
---|
| 1574 | ****************************************************************************/ |
---|
| 1575 | |
---|
| 1576 | unsigned8 inline SciCharAvailable( void ) |
---|
| 1577 | { |
---|
| 1578 | return ( *SCSR & SCI_RCVR_READY ); // char in data register? |
---|
| 1579 | } |
---|
| 1580 | |
---|
| 1581 | |
---|
| 1582 | /**************************************************************************** |
---|
| 1583 | * Func: SciSendBreak |
---|
| 1584 | * Desc: send 1 or tow breaks (all zero bits) |
---|
| 1585 | * Inputs: none |
---|
| 1586 | * Outputs: none |
---|
| 1587 | * Errors: none |
---|
| 1588 | * Scope: public |
---|
| 1589 | ****************************************************************************/ |
---|
| 1590 | |
---|
| 1591 | void SciSendBreak( void ) |
---|
| 1592 | { |
---|
| 1593 | // From the Motorola QSM reference manual - |
---|
| 1594 | |
---|
| 1595 | // "if SBK is toggled by writing it first to a one and then immediately |
---|
| 1596 | // to a zero (in less than one serial frame interval), the transmitter |
---|
| 1597 | // sends only one or two break frames before reverting to mark (idle) |
---|
| 1598 | // or before commencing to send more data" |
---|
| 1599 | |
---|
| 1600 | *SCCR1 |= SCI_SEND_BREAK; // set the bit |
---|
| 1601 | |
---|
| 1602 | *SCCR1 &= ~SCI_SEND_BREAK; // clear the bit |
---|
| 1603 | |
---|
| 1604 | return; |
---|
| 1605 | } |
---|
| 1606 | |
---|
| 1607 | |
---|
| 1608 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 1609 | // |
---|
| 1610 | // SECTION 6 |
---|
| 1611 | // TEST CODE |
---|
| 1612 | // |
---|
| 1613 | ///////////////////////////////////////////////////////////////////////////// |
---|
| 1614 | |
---|
| 1615 | |
---|
| 1616 | /**************************************************************************** |
---|
| 1617 | * Func: SciUnitTest |
---|
| 1618 | * Desc: test the device driver |
---|
| 1619 | * Inputs: nothing |
---|
| 1620 | * Outputs: nothing |
---|
| 1621 | * Scope: public |
---|
| 1622 | ****************************************************************************/ |
---|
| 1623 | |
---|
[0b6d74d0] | 1624 | #if 0 |
---|
[274fa77] | 1625 | #define O_RDWR LIBIO_FLAGS_READ_WRITE // dont like this but... |
---|
| 1626 | |
---|
| 1627 | void SciUnitTest() |
---|
| 1628 | { |
---|
| 1629 | unsigned8 byte; // a character |
---|
| 1630 | unsigned16 fd; // file descriptor for device |
---|
| 1631 | unsigned16 result; // result of ioctl |
---|
| 1632 | |
---|
| 1633 | |
---|
| 1634 | fd = open("/dev/sci",O_RDWR); // open the device |
---|
| 1635 | |
---|
| 1636 | printk("SCI open fd=%d\r\n",fd); |
---|
| 1637 | |
---|
| 1638 | |
---|
| 1639 | result = write(fd, "abcd\r\n", 6); // send a string |
---|
| 1640 | |
---|
| 1641 | printk("SCI write result=%d\r\n",result); |
---|
| 1642 | |
---|
| 1643 | |
---|
| 1644 | result = read(fd, &byte, 1); // read a byte |
---|
| 1645 | |
---|
| 1646 | printk("SCI read result=%d,byte=%x\r\n",result,byte); |
---|
| 1647 | |
---|
| 1648 | return; |
---|
| 1649 | } |
---|
[0b6d74d0] | 1650 | #endif |
---|
[274fa77] | 1651 | |
---|
| 1652 | |
---|
| 1653 | /**************************************************************************** |
---|
| 1654 | * Func: SciPrintStats |
---|
| 1655 | * Desc: print out some driver information |
---|
| 1656 | * Inputs: nothing |
---|
| 1657 | * Outputs: nothing |
---|
| 1658 | * Scope: public |
---|
| 1659 | ****************************************************************************/ |
---|
| 1660 | |
---|
| 1661 | void SciPrintStats ( void ) |
---|
| 1662 | { |
---|
[0b6d74d0] | 1663 | printk("\r\n"); |
---|
[274fa77] | 1664 | |
---|
[0b6d74d0] | 1665 | printk( "SYS_CLOCK is %2.6f Mhz\r\n\n", SYS_CLOCK / 1000000.0 ); |
---|
[274fa77] | 1666 | |
---|
[0b6d74d0] | 1667 | printk( "Current baud rate is %d bps or %d cps\r\n\n", SciBaud, SciBaud / 10 ); |
---|
[274fa77] | 1668 | |
---|
[0b6d74d0] | 1669 | printk( "SCI Uart chars in %8d\r\n", SciBytesIn ); |
---|
| 1670 | printk( "SCI Uart chars out %8d\r\n", SciBytesOut ); |
---|
| 1671 | printk( "SCI Uart framing errors %8d\r\n", SciErrorsFraming ); |
---|
| 1672 | printk( "SCI Uart parity errors %8d\r\n", SciErrorsParity ); |
---|
| 1673 | printk( "SCI Uart overrun errors %8d\r\n", SciErrorsOverrun ); |
---|
| 1674 | printk( "SCI Uart noise errors %8d\r\n", SciErrorsNoise ); |
---|
[274fa77] | 1675 | |
---|
| 1676 | return; |
---|
| 1677 | } |
---|
| 1678 | |
---|
| 1679 | |
---|
| 1680 | |
---|