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annotate fluid-mnf/serial.c @ 342:6ff231195905

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fluid-mnf/serial.[ch]: beginning of Linux port
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 13 Mar 2020 05:39:37 +0000
parents 9cecc930d78f
children 917e05f03ad2
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9cecc930d78f fluid-mnf: original source from TI,
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1 /******************************************************************************
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2 * FLUID (Flash Loader Utility Independent of Device)
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3 *
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4 * Copyright Texas Instruments, 2001.
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5 * Mads Meisner-Jensen, mmj@ti.com.
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6 *
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7 * Serial/UART driver
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8 *
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9 * $Id: serial.c 1.23 Fri, 18 Oct 2002 08:53:12 +0200 mmj $
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10 *
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11 * This serial interface handling architecture has been majorly redesigned
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12 * by Mychaela N. Falconia for the present fluid-mnf Linux port.
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13 *
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14 * Because FLUID supports Calypso high baud rates of 203125, 406250 and 812500
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15 * bps, as well as D-Sample XXO (eXternal Xtal Oscillator) baud rates of
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16 * 230400, 460800 and 912600 bps, the present fluid-mnf port had to be made
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17 * quite Linux-specific, using the same raw ioctl approach as is used in
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18 * freecalypso-tools/libserial-linux.
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19 *
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20 ******************************************************************************/
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21
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22 #include "fluid.h"
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23 #include "serial.h"
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24 #include "trace.h"
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25
342
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26 #include <sys/types.h>
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27 #include <sys/file.h>
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28 #include <sys/time.h>
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29 #include <sys/ioctl.h>
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30 #include <asm/ioctls.h>
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31 #include <asm/termbits.h>
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32 #include <assert.h>
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33 #include <stdio.h>
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34 #include <stdlib.h>
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35 #include <string.h>
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36 #include <unistd.h>
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37
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38
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39 /******************************************************************************
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40 * Linux Driver
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41 ******************************************************************************/
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42
342
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43 static int target_fd;
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44 static struct termios2 target_termios;
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45
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46 static const char port_name_prefix[] = "/dev/ttyUSB";
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47
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48 static void fill_termios(int bps)
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49 {
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50 int termios_baud_code;
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51
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52 switch (bps) {
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53 case 9600:
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54 termios_baud_code = B9600;
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55 break;
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56 case 19200:
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57 termios_baud_code = B19200;
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58 break;
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59 case 38400:
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60 termios_baud_code = B38400;
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61 break;
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62 case 57600:
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63 termios_baud_code = B57600;
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64 break;
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65 case 115200:
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66 termios_baud_code = B115200;
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67 break;
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68 case 230400:
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69 termios_baud_code = B230400;
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70 break;
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71 case 460800:
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72 termios_baud_code = B460800;
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73 break;
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74 case 921600:
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75 termios_baud_code = B921600;
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76 break;
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77 default:
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78 termios_baud_code = BOTHER;
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79 }
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80 target_termios.c_iflag = IGNBRK;
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81 target_termios.c_oflag = 0;
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82 target_termios.c_cflag = termios_baud_code | CLOCAL|HUPCL|CREAD|CS8;
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83 target_termios.c_lflag = 0;
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84 target_termios.c_cc[VMIN] = 1;
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85 target_termios.c_cc[VTIME] = 0;
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86 target_termios.c_ispeed = bps;
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87 target_termios.c_ospeed = bps;
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88 }
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89
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90 int serial_init(int uart, int bps, char *flowcontrol)
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91 {
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92 char ttyport[32];
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93 static int zero = 0;
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94
342
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95 sprintf(ttyport, "%s%d", port_name_prefix, uart);
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96 target_fd = open(ttyport, O_RDWR|O_NONBLOCK);
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97 if (target_fd < 0)
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98 return E_OS + E_UART_INIT;
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99 ioctl(target_fd, TIOCEXCL);
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100 fill_termios(bps);
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101 if (ioctl(target_fd, TCSETSF2, &target_termios) < 0)
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102 return E_OS + E_UART_INIT;
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103 ioctl(target_fd, FIONBIO, &zero);
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104
342
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105 if (arg_uart_level_convert) {
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106 /*
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107 * Powering TI's serial level converter
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108 * with DTR = +12V and RTS = -12V
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109 */
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110 serial_dtr(1);
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111 serial_rts(0);
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112 }
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113
342
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114 serial_reset();
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115 return 0;
311
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116 }
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117
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118 int serial_is_baudrate(int bps)
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119 {
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120 int i;
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121 const struct rate_s {
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122 int bps;
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123 int baudrate;
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124 } rates[] = {
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125 { 9600, 9600 }, { 9, 9600 },
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126 { 14400, 14400 }, { 14, 14400 },
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127 { 19200, 19200 }, { 19, 19200 },
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128 { 38400, 38400 }, { 38, 38400 },
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129 { 57600, 57600 }, { 57, 57600 },
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130 { 115200, 115200 }, { 115, 115200 },
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131 { 203125, 203125 }, { 203, 203125 }, // 13MHz clock
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132 { 230400, 230400 }, { 230, 230400 },
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parents:
diff changeset
133 { 406250, 406250 }, { 406, 406250 }, // 13MHz clock
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 { 460800, 460800 }, { 460, 460800 },
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 { 812500, 812500 }, { 812, 812500 }, // 13MHz clock
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 { 921600, 921600 }, { 921, 921600 },
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 { 0, 0 } // terminator
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 };
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 for (i = 0; i < sizeof(rates) / sizeof(struct rate_s) - 1; i++)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 if (rates[i].bps == bps)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 break;
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 tr(TrTargetDrv, "serial_is_baudrate(%d) %d\n", bps, rates[i].baudrate);
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 return rates[i].baudrate;
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 int serial_baudrate_set(int bps)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 {
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 bps = serial_is_baudrate(bps);
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 if (bps == 0)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 return E_OS + E_UART_PARAM;
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
155 fill_termios(bps);
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
156 if (ioctl(target_fd, TCSETSF2, &target_termios) < 0)
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 return E_OS + E_UART_PARAM;
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 return bps;
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 int serial_baudrate_get(void)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 {
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
164 return target_termios.c_ospeed;
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 void serial_exit(void)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 {
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 serial_reset();
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
170 close(target_fd);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 // Clear buffers and transactions.
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 void serial_reset(void)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 {
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
176 ioctl(target_fd, TCFLSH, TCIOFLUSH);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 // Return the number of milli-seconds it takes to transfer <n> bytes.
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 int serial_transfer_time(int size)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 {
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 return 1000 * 10 * size / serial_baudrate_get();
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 /***************************************
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 * Send
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 ***************************************/
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 int serial_send(char *buf, int size)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 {
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
192 int cc;
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
194 cc = write(target_fd, buf, size);
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
195 if (cc < 0)
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
196 cc = E_OS + E_UART_DRV_SEND;
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
197 return cc;
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201 /***************************************
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 * Receive
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 ***************************************/
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 void serial_recv_reset(void)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 {
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
207 ioctl(target_fd, TCFLSH, TCIFLUSH);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
210 int serial_recv(char *buf, int size, int timeout)
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 {
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
212 /* to be filled */
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 /******************************************************************************
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 * Control of Delta cable special outputs
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 ******************************************************************************/
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 void serial_rts(char state)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 {
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
222 int rts_arg = TIOCM_RTS;
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
223
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 if (state)
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
225 ioctl(target_fd, TIOCMBIS, &rts_arg);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226 else
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
227 ioctl(target_fd, TIOCMBIC, &rts_arg);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 void serial_dtr(char state)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 {
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
232 int dtr_arg = TIOCM_DTR;
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
233
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 if (state)
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
235 ioctl(target_fd, TIOCMBIS, &dtr_arg);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 else
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
237 ioctl(target_fd, TIOCMBIC, &dtr_arg);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 }
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
240 void serial_break(char state)
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
241 {
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
242 if (state)
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
243 ioctl(target_fd, TIOCSBRK);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
244 else
342
6ff231195905 fluid-mnf/serial.[ch]: beginning of Linux port
Mychaela Falconia <falcon@freecalypso.org>
parents: 311
diff changeset
245 ioctl(target_fd, TIOCCBRK);
311
9cecc930d78f fluid-mnf: original source from TI,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 }