[55e1322] | 1 | /* |
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| 2 | * TERMIOS serial line support |
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| 3 | * |
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[d24ceb3] | 4 | * Author: |
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[55e1322] | 5 | * W. Eric Norum |
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| 6 | * Saskatchewan Accelerator Laboratory |
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| 7 | * University of Saskatchewan |
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| 8 | * Saskatoon, Saskatchewan, CANADA |
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| 9 | * eric@skatter.usask.ca |
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| 10 | * |
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| 11 | * The license and distribution terms for this file may be |
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| 12 | * found in the file LICENSE in this distribution or at |
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[c499856] | 13 | * http://www.rtems.org/license/LICENSE. |
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[55e1322] | 14 | */ |
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| 15 | |
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[9c49db4] | 16 | #if HAVE_CONFIG_H |
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| 17 | #include "config.h" |
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| 18 | #endif |
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| 19 | |
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[55e1322] | 20 | #include <rtems.h> |
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| 21 | #include <rtems/libio.h> |
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| 22 | #include <ctype.h> |
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| 23 | #include <errno.h> |
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| 24 | #include <stdio.h> |
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| 25 | #include <stdlib.h> |
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| 26 | #include <termios.h> |
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| 27 | #include <unistd.h> |
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[e2af631] | 28 | #include <sys/ttycom.h> |
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| 29 | |
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[88d7985] | 30 | #include <rtems/termiostypes.h> |
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[55e1322] | 31 | |
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| 32 | /* |
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| 33 | * The size of the cooked buffer |
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| 34 | */ |
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[6cc69f1] | 35 | #define CBUFSIZE (rtems_termios_cbufsize) |
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[118a812] | 36 | |
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| 37 | /* |
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[d24ceb3] | 38 | * The sizes of the raw message buffers. |
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| 39 | * On most architectures it is quite a bit more |
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| 40 | * efficient if these are powers of two. |
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[118a812] | 41 | */ |
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[6cc69f1] | 42 | #define RAW_INPUT_BUFFER_SIZE (rtems_termios_raw_input_size) |
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| 43 | #define RAW_OUTPUT_BUFFER_SIZE (rtems_termios_raw_output_size) |
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[55e1322] | 44 | |
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[18040d3] | 45 | /* fields for "flow_ctrl" status */ |
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[bbc0615] | 46 | #define FL_IREQXOF 1U /* input queue requests stop of incoming data */ |
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| 47 | #define FL_ISNTXOF 2U /* XOFF has been sent to other side of line */ |
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| 48 | #define FL_IRTSOFF 4U /* RTS has been turned off for other side.. */ |
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[18040d3] | 49 | |
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[bbc0615] | 50 | #define FL_ORCVXOF 0x10U /* XOFF has been received */ |
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| 51 | #define FL_OSTOP 0x20U /* output has been stopped due to XOFF */ |
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[18040d3] | 52 | |
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[bbc0615] | 53 | #define FL_MDRTS 0x100U /* input controlled with RTS/CTS handshake */ |
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| 54 | #define FL_MDXON 0x200U /* input controlled with XON/XOFF protocol */ |
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| 55 | #define FL_MDXOF 0x400U /* output controlled with XON/XOFF protocol */ |
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[18040d3] | 56 | |
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[e2af631] | 57 | #define NODISC(n) \ |
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[6cc69f1] | 58 | { NULL, NULL, NULL, NULL, \ |
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| 59 | NULL, NULL, NULL, NULL } |
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[e2af631] | 60 | /* |
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[c00b80c1] | 61 | * FIXME: change rtems_termios_linesw entries consistent |
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| 62 | * with rtems_termios_linesw entry usage... |
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[e2af631] | 63 | */ |
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[6cc69f1] | 64 | struct rtems_termios_linesw rtems_termios_linesw[MAXLDISC] = |
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[e2af631] | 65 | { |
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[6cc69f1] | 66 | NODISC(0), /* 0- termios-built-in */ |
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| 67 | NODISC(1), /* 1- defunct */ |
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[c00b80c1] | 68 | NODISC(2), /* 2- NTTYDISC */ |
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[6cc69f1] | 69 | NODISC(3), /* TABLDISC */ |
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| 70 | NODISC(4), /* SLIPDISC */ |
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| 71 | NODISC(5), /* PPPDISC */ |
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| 72 | NODISC(6), /* loadable */ |
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| 73 | NODISC(7), /* loadable */ |
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[e2af631] | 74 | }; |
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| 75 | |
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[c00b80c1] | 76 | int rtems_termios_nlinesw = |
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| 77 | sizeof (rtems_termios_linesw) / sizeof (rtems_termios_linesw[0]); |
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[e2af631] | 78 | |
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[5adf355a] | 79 | extern rtems_id rtems_termios_ttyMutex; |
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[55e1322] | 80 | |
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[96406152] | 81 | static size_t rtems_termios_cbufsize = 256; |
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| 82 | static size_t rtems_termios_raw_input_size = 128; |
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| 83 | static size_t rtems_termios_raw_output_size = 64; |
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[1f5d2ba] | 84 | |
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[f6b1e063] | 85 | static struct rtems_termios_tty *rtems_termios_ttyHead; |
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| 86 | static struct rtems_termios_tty *rtems_termios_ttyTail; |
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| 87 | |
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[ef8c00bc] | 88 | static RTEMS_CHAIN_DEFINE_EMPTY(rtems_termios_devices); |
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| 89 | |
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[e2af631] | 90 | static rtems_task rtems_termios_rxdaemon(rtems_task_argument argument); |
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| 91 | static rtems_task rtems_termios_txdaemon(rtems_task_argument argument); |
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| 92 | /* |
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| 93 | * some constants for I/O daemon task creation |
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| 94 | */ |
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| 95 | #define TERMIOS_TXTASK_PRIO 10 |
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| 96 | #define TERMIOS_RXTASK_PRIO 9 |
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| 97 | #define TERMIOS_TXTASK_STACKSIZE 1024 |
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| 98 | #define TERMIOS_RXTASK_STACKSIZE 1024 |
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| 99 | /* |
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| 100 | * some events to be sent to the I/O tasks |
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| 101 | */ |
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| 102 | #define TERMIOS_TX_START_EVENT RTEMS_EVENT_1 |
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| 103 | #define TERMIOS_TX_TERMINATE_EVENT RTEMS_EVENT_0 |
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| 104 | |
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| 105 | #define TERMIOS_RX_PROC_EVENT RTEMS_EVENT_1 |
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| 106 | #define TERMIOS_RX_TERMINATE_EVENT RTEMS_EVENT_0 |
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| 107 | |
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[ef8c00bc] | 108 | static rtems_termios_device_node * |
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| 109 | rtems_termios_find_device_node( |
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| 110 | rtems_device_major_number major, |
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| 111 | rtems_device_minor_number minor |
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[c00b80c1] | 112 | ) |
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[55e1322] | 113 | { |
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[ef8c00bc] | 114 | rtems_chain_node *tail = rtems_chain_tail(&rtems_termios_devices); |
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| 115 | rtems_chain_node *current = rtems_chain_first(&rtems_termios_devices); |
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| 116 | |
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| 117 | while (current != tail) { |
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| 118 | rtems_termios_device_node *device_node = |
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| 119 | (rtems_termios_device_node *) current; |
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| 120 | |
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| 121 | if (device_node->major == major && device_node->minor == minor) { |
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| 122 | return device_node; |
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| 123 | } |
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| 124 | |
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| 125 | current = rtems_chain_next(current); |
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| 126 | } |
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| 127 | |
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| 128 | return NULL; |
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| 129 | } |
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| 130 | |
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| 131 | rtems_status_code rtems_termios_device_install( |
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| 132 | const char *device_file, |
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| 133 | rtems_device_major_number major, |
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| 134 | rtems_device_minor_number minor, |
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| 135 | const rtems_termios_device_handler *handler, |
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[a830cb8] | 136 | const rtems_termios_device_flow *flow, |
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[ef8c00bc] | 137 | void *context |
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| 138 | ) |
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| 139 | { |
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| 140 | rtems_status_code sc; |
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| 141 | rtems_termios_device_node *new_device_node; |
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| 142 | rtems_termios_device_node *existing_device_node; |
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| 143 | |
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| 144 | new_device_node = malloc(sizeof(*new_device_node)); |
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| 145 | if (new_device_node == NULL) { |
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| 146 | return RTEMS_NO_MEMORY; |
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| 147 | } |
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| 148 | |
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| 149 | new_device_node->major = major; |
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| 150 | new_device_node->minor = minor; |
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| 151 | new_device_node->handler = handler; |
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[a830cb8] | 152 | new_device_node->flow = flow; |
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[ef8c00bc] | 153 | new_device_node->context = context; |
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| 154 | new_device_node->tty = NULL; |
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[6cc69f1] | 155 | |
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[c00b80c1] | 156 | sc = rtems_semaphore_obtain( |
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| 157 | rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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[ef8c00bc] | 158 | if (sc != RTEMS_SUCCESSFUL) { |
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| 159 | free(new_device_node); |
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| 160 | return RTEMS_INCORRECT_STATE; |
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| 161 | } |
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[c00b80c1] | 162 | |
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[ef8c00bc] | 163 | existing_device_node = rtems_termios_find_device_node (major, minor); |
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| 164 | if (existing_device_node != NULL) { |
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| 165 | free(new_device_node); |
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| 166 | rtems_semaphore_release (rtems_termios_ttyMutex); |
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| 167 | return RTEMS_RESOURCE_IN_USE; |
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| 168 | } |
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| 169 | |
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| 170 | if (device_file != NULL) { |
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| 171 | sc = rtems_io_register_name (device_file, major, minor); |
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| 172 | if (sc != RTEMS_SUCCESSFUL) { |
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| 173 | free(new_device_node); |
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| 174 | rtems_semaphore_release (rtems_termios_ttyMutex); |
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| 175 | return RTEMS_UNSATISFIED; |
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| 176 | } |
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| 177 | } |
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| 178 | |
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| 179 | rtems_chain_append_unprotected( |
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| 180 | &rtems_termios_devices, &new_device_node->node); |
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| 181 | |
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| 182 | rtems_semaphore_release (rtems_termios_ttyMutex); |
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| 183 | |
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| 184 | return RTEMS_SUCCESSFUL; |
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| 185 | } |
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| 186 | |
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| 187 | rtems_status_code rtems_termios_device_remove( |
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| 188 | const char *device_file, |
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| 189 | rtems_device_major_number major, |
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| 190 | rtems_device_minor_number minor |
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| 191 | ) |
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| 192 | { |
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| 193 | rtems_status_code sc; |
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| 194 | rtems_termios_device_node *device_node; |
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| 195 | |
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| 196 | sc = rtems_semaphore_obtain( |
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| 197 | rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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| 198 | if (sc != RTEMS_SUCCESSFUL) { |
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| 199 | return RTEMS_INCORRECT_STATE; |
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| 200 | } |
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| 201 | |
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| 202 | device_node = rtems_termios_find_device_node (major, minor); |
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| 203 | if (device_node == NULL) { |
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| 204 | rtems_semaphore_release (rtems_termios_ttyMutex); |
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| 205 | return RTEMS_INVALID_ID; |
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[6cc69f1] | 206 | } |
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[c00b80c1] | 207 | |
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[ef8c00bc] | 208 | if (device_node->tty != NULL) { |
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| 209 | rtems_semaphore_release (rtems_termios_ttyMutex); |
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| 210 | return RTEMS_RESOURCE_IN_USE; |
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| 211 | } |
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| 212 | |
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| 213 | if (device_file != NULL) { |
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| 214 | int rv = unlink (device_file); |
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| 215 | |
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| 216 | if (rv != 0) { |
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| 217 | rtems_semaphore_release (rtems_termios_ttyMutex); |
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| 218 | return RTEMS_UNSATISFIED; |
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| 219 | } |
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| 220 | } |
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| 221 | |
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| 222 | rtems_chain_extract_unprotected (&device_node->node); |
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| 223 | free (device_node); |
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| 224 | |
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| 225 | rtems_semaphore_release (rtems_termios_ttyMutex); |
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| 226 | |
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| 227 | return RTEMS_SUCCESSFUL; |
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| 228 | } |
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| 229 | |
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| 230 | static bool |
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| 231 | rtems_termios_callback_firstOpen( |
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| 232 | rtems_termios_tty *tty, |
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| 233 | rtems_libio_open_close_args_t *args |
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| 234 | ) |
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| 235 | { |
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| 236 | (*tty->device.firstOpen) (tty->major, tty->minor, args); |
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| 237 | |
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| 238 | return true; |
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| 239 | } |
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| 240 | |
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| 241 | static void |
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| 242 | rtems_termios_callback_lastClose( |
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| 243 | rtems_termios_tty *tty, |
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| 244 | rtems_libio_open_close_args_t *args |
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| 245 | ) |
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| 246 | { |
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| 247 | (*tty->device.lastClose) (tty->major, tty->minor, args); |
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| 248 | } |
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| 249 | |
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| 250 | static int |
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| 251 | rtems_termios_callback_pollRead (struct rtems_termios_tty *tty) |
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| 252 | { |
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| 253 | return (*tty->device.pollRead) (tty->minor); |
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| 254 | } |
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| 255 | |
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| 256 | static void |
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| 257 | rtems_termios_callback_write( |
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| 258 | rtems_termios_tty *tty, |
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| 259 | const char *buf, |
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| 260 | size_t len |
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| 261 | ) |
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| 262 | { |
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| 263 | (*tty->device.write) (tty->minor, buf, len); |
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| 264 | } |
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| 265 | |
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| 266 | static bool |
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| 267 | rtems_termios_callback_setAttributes( |
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| 268 | rtems_termios_tty *tty, |
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| 269 | const struct termios *term |
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| 270 | ) |
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| 271 | { |
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| 272 | (*tty->device.setAttributes) (tty->minor, term); |
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| 273 | |
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| 274 | return true; |
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| 275 | } |
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| 276 | |
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| 277 | static void |
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| 278 | rtems_termios_callback_stopRemoteTx (rtems_termios_tty *tty) |
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| 279 | { |
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| 280 | (*tty->device.stopRemoteTx) (tty->minor); |
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| 281 | } |
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| 282 | |
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| 283 | static void |
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| 284 | rtems_termios_callback_startRemoteTx (rtems_termios_tty *tty) |
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| 285 | { |
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| 286 | (*tty->device.startRemoteTx) (tty->minor); |
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| 287 | } |
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| 288 | |
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[a0fb29f] | 289 | /* |
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| 290 | * Drain output queue |
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| 291 | */ |
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| 292 | static void |
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| 293 | drainOutput (struct rtems_termios_tty *tty) |
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| 294 | { |
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| 295 | rtems_interrupt_lock_context lock_context; |
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| 296 | rtems_status_code sc; |
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| 297 | |
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| 298 | if (tty->handler.mode != TERMIOS_POLLED) { |
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| 299 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
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| 300 | while (tty->rawOutBuf.Tail != tty->rawOutBuf.Head) { |
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| 301 | tty->rawOutBufState = rob_wait; |
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| 302 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
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| 303 | sc = rtems_semaphore_obtain( |
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| 304 | tty->rawOutBuf.Semaphore, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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| 305 | if (sc != RTEMS_SUCCESSFUL) |
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| 306 | rtems_fatal_error_occurred (sc); |
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| 307 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
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| 308 | } |
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| 309 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
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| 310 | } |
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| 311 | } |
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| 312 | |
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| 313 | static void |
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| 314 | rtems_termios_destroy_tty (rtems_termios_tty *tty, void *arg, bool last_close) |
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| 315 | { |
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| 316 | rtems_status_code sc; |
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| 317 | |
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| 318 | if (rtems_termios_linesw[tty->t_line].l_close != NULL) { |
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| 319 | /* |
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| 320 | * call discipline-specific close |
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| 321 | */ |
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| 322 | sc = rtems_termios_linesw[tty->t_line].l_close(tty); |
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| 323 | } else if (last_close) { |
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| 324 | /* |
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| 325 | * default: just flush output buffer |
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| 326 | */ |
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| 327 | sc = rtems_semaphore_obtain(tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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| 328 | if (sc != RTEMS_SUCCESSFUL) { |
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| 329 | rtems_fatal_error_occurred (sc); |
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| 330 | } |
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| 331 | drainOutput (tty); |
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| 332 | rtems_semaphore_release (tty->osem); |
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| 333 | } |
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| 334 | |
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| 335 | if (tty->handler.mode == TERMIOS_TASK_DRIVEN) { |
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| 336 | /* |
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| 337 | * send "terminate" to I/O tasks |
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| 338 | */ |
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| 339 | sc = rtems_event_send( tty->rxTaskId, TERMIOS_RX_TERMINATE_EVENT ); |
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| 340 | if (sc != RTEMS_SUCCESSFUL) |
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| 341 | rtems_fatal_error_occurred (sc); |
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| 342 | sc = rtems_event_send( tty->txTaskId, TERMIOS_TX_TERMINATE_EVENT ); |
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| 343 | if (sc != RTEMS_SUCCESSFUL) |
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| 344 | rtems_fatal_error_occurred (sc); |
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| 345 | } |
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| 346 | if (last_close && tty->handler.last_close) |
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| 347 | (*tty->handler.last_close)(tty, arg); |
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| 348 | |
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| 349 | if (tty->device_node != NULL) |
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| 350 | tty->device_node->tty = NULL; |
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| 351 | |
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| 352 | rtems_semaphore_delete (tty->isem); |
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| 353 | rtems_semaphore_delete (tty->osem); |
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| 354 | rtems_semaphore_delete (tty->rawOutBuf.Semaphore); |
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| 355 | if ((tty->handler.poll_read == NULL) || |
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| 356 | (tty->handler.mode == TERMIOS_TASK_DRIVEN)) |
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| 357 | rtems_semaphore_delete (tty->rawInBuf.Semaphore); |
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| 358 | rtems_interrupt_lock_destroy (&tty->interrupt_lock); |
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| 359 | free (tty->rawInBuf.theBuf); |
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| 360 | free (tty->rawOutBuf.theBuf); |
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| 361 | free (tty->cbuf); |
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| 362 | free (tty); |
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| 363 | } |
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| 364 | |
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[ef8c00bc] | 365 | static rtems_termios_tty * |
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| 366 | rtems_termios_open_tty( |
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| 367 | rtems_device_major_number major, |
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| 368 | rtems_device_minor_number minor, |
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| 369 | rtems_libio_open_close_args_t *args, |
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| 370 | rtems_termios_tty *tty, |
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| 371 | rtems_termios_device_node *device_node, |
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| 372 | const rtems_termios_callbacks *callbacks |
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| 373 | ) |
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| 374 | { |
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| 375 | rtems_status_code sc; |
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| 376 | |
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[6cc69f1] | 377 | if (tty == NULL) { |
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| 378 | static char c = 'a'; |
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| 379 | |
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| 380 | /* |
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| 381 | * Create a new device |
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| 382 | */ |
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| 383 | tty = calloc (1, sizeof (struct rtems_termios_tty)); |
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| 384 | if (tty == NULL) { |
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[ef8c00bc] | 385 | return NULL; |
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[6cc69f1] | 386 | } |
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| 387 | /* |
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| 388 | * allocate raw input buffer |
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| 389 | */ |
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| 390 | tty->rawInBuf.Size = RAW_INPUT_BUFFER_SIZE; |
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| 391 | tty->rawInBuf.theBuf = malloc (tty->rawInBuf.Size); |
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| 392 | if (tty->rawInBuf.theBuf == NULL) { |
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| 393 | free(tty); |
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[ef8c00bc] | 394 | return NULL; |
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[6cc69f1] | 395 | } |
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| 396 | /* |
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| 397 | * allocate raw output buffer |
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| 398 | */ |
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| 399 | tty->rawOutBuf.Size = RAW_OUTPUT_BUFFER_SIZE; |
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| 400 | tty->rawOutBuf.theBuf = malloc (tty->rawOutBuf.Size); |
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| 401 | if (tty->rawOutBuf.theBuf == NULL) { |
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| 402 | free((void *)(tty->rawInBuf.theBuf)); |
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| 403 | free(tty); |
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[ef8c00bc] | 404 | return NULL; |
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[6cc69f1] | 405 | } |
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| 406 | /* |
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| 407 | * allocate cooked buffer |
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| 408 | */ |
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| 409 | tty->cbuf = malloc (CBUFSIZE); |
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| 410 | if (tty->cbuf == NULL) { |
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| 411 | free((void *)(tty->rawOutBuf.theBuf)); |
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| 412 | free((void *)(tty->rawInBuf.theBuf)); |
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| 413 | free(tty); |
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[ef8c00bc] | 414 | return NULL; |
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[6cc69f1] | 415 | } |
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| 416 | /* |
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| 417 | * Initialize wakeup callbacks |
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| 418 | */ |
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| 419 | tty->tty_snd.sw_pfn = NULL; |
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| 420 | tty->tty_snd.sw_arg = NULL; |
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| 421 | tty->tty_rcv.sw_pfn = NULL; |
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| 422 | tty->tty_rcv.sw_arg = NULL; |
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| 423 | tty->tty_rcvwakeup = 0; |
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| 424 | |
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| 425 | tty->minor = minor; |
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| 426 | tty->major = major; |
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| 427 | |
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| 428 | /* |
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| 429 | * Set up mutex semaphores |
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| 430 | */ |
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| 431 | sc = rtems_semaphore_create ( |
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| 432 | rtems_build_name ('T', 'R', 'i', c), |
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| 433 | 1, |
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| 434 | RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY, |
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| 435 | RTEMS_NO_PRIORITY, |
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| 436 | &tty->isem); |
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| 437 | if (sc != RTEMS_SUCCESSFUL) |
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| 438 | rtems_fatal_error_occurred (sc); |
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| 439 | sc = rtems_semaphore_create ( |
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| 440 | rtems_build_name ('T', 'R', 'o', c), |
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| 441 | 1, |
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| 442 | RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY, |
---|
| 443 | RTEMS_NO_PRIORITY, |
---|
| 444 | &tty->osem); |
---|
| 445 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 446 | rtems_fatal_error_occurred (sc); |
---|
| 447 | sc = rtems_semaphore_create ( |
---|
| 448 | rtems_build_name ('T', 'R', 'x', c), |
---|
| 449 | 0, |
---|
| 450 | RTEMS_SIMPLE_BINARY_SEMAPHORE | RTEMS_FIFO, |
---|
| 451 | RTEMS_NO_PRIORITY, |
---|
| 452 | &tty->rawOutBuf.Semaphore); |
---|
| 453 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 454 | rtems_fatal_error_occurred (sc); |
---|
| 455 | tty->rawOutBufState = rob_idle; |
---|
| 456 | |
---|
| 457 | /* |
---|
| 458 | * Set callbacks |
---|
| 459 | */ |
---|
[ef8c00bc] | 460 | if (device_node != NULL) { |
---|
| 461 | device_node->tty = tty; |
---|
| 462 | tty->handler = *device_node->handler; |
---|
[a830cb8] | 463 | |
---|
| 464 | if (device_node->flow != NULL) { |
---|
| 465 | tty->flow = *device_node->flow; |
---|
| 466 | } |
---|
| 467 | |
---|
[ef8c00bc] | 468 | tty->device_node = device_node; |
---|
| 469 | tty->device_context = device_node->context; |
---|
| 470 | memset(&tty->device, 0, sizeof(tty->device)); |
---|
| 471 | } else { |
---|
| 472 | tty->handler.first_open = callbacks->firstOpen != NULL ? |
---|
| 473 | rtems_termios_callback_firstOpen : NULL; |
---|
| 474 | tty->handler.last_close = callbacks->lastClose != NULL ? |
---|
| 475 | rtems_termios_callback_lastClose : NULL; |
---|
| 476 | tty->handler.poll_read = callbacks->pollRead != NULL ? |
---|
| 477 | rtems_termios_callback_pollRead : NULL; |
---|
| 478 | tty->handler.write = callbacks->write != NULL ? |
---|
| 479 | rtems_termios_callback_write : NULL; |
---|
| 480 | tty->handler.set_attributes = callbacks->setAttributes != NULL ? |
---|
| 481 | rtems_termios_callback_setAttributes : NULL; |
---|
[a830cb8] | 482 | tty->flow.stop_remote_tx = callbacks->stopRemoteTx != NULL ? |
---|
[ef8c00bc] | 483 | rtems_termios_callback_stopRemoteTx : NULL; |
---|
[a830cb8] | 484 | tty->flow.start_remote_tx = callbacks->startRemoteTx != NULL ? |
---|
[ef8c00bc] | 485 | rtems_termios_callback_startRemoteTx : NULL; |
---|
| 486 | tty->handler.mode = callbacks->outputUsesInterrupts; |
---|
| 487 | tty->device_context = NULL; |
---|
| 488 | tty->device_node = NULL; |
---|
| 489 | tty->device = *callbacks; |
---|
| 490 | } |
---|
[6cc69f1] | 491 | |
---|
[53ad908] | 492 | rtems_interrupt_lock_initialize (&tty->interrupt_lock, "Termios"); |
---|
[65483f8] | 493 | |
---|
[6cc69f1] | 494 | /* |
---|
| 495 | * Create I/O tasks |
---|
| 496 | */ |
---|
[ef8c00bc] | 497 | if (tty->handler.mode == TERMIOS_TASK_DRIVEN) { |
---|
[6cc69f1] | 498 | sc = rtems_task_create ( |
---|
[e2af631] | 499 | rtems_build_name ('T', 'x', 'T', c), |
---|
[6cc69f1] | 500 | TERMIOS_TXTASK_PRIO, |
---|
| 501 | TERMIOS_TXTASK_STACKSIZE, |
---|
| 502 | RTEMS_NO_PREEMPT | RTEMS_NO_TIMESLICE | |
---|
| 503 | RTEMS_NO_ASR, |
---|
| 504 | RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL, |
---|
| 505 | &tty->txTaskId); |
---|
| 506 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 507 | rtems_fatal_error_occurred (sc); |
---|
| 508 | sc = rtems_task_create ( |
---|
[e2af631] | 509 | rtems_build_name ('R', 'x', 'T', c), |
---|
[6cc69f1] | 510 | TERMIOS_RXTASK_PRIO, |
---|
| 511 | TERMIOS_RXTASK_STACKSIZE, |
---|
| 512 | RTEMS_NO_PREEMPT | RTEMS_NO_TIMESLICE | |
---|
| 513 | RTEMS_NO_ASR, |
---|
| 514 | RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL, |
---|
| 515 | &tty->rxTaskId); |
---|
| 516 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 517 | rtems_fatal_error_occurred (sc); |
---|
| 518 | |
---|
| 519 | } |
---|
[ef8c00bc] | 520 | if ((tty->handler.poll_read == NULL) || |
---|
| 521 | (tty->handler.mode == TERMIOS_TASK_DRIVEN)){ |
---|
[6cc69f1] | 522 | sc = rtems_semaphore_create ( |
---|
| 523 | rtems_build_name ('T', 'R', 'r', c), |
---|
| 524 | 0, |
---|
| 525 | RTEMS_SIMPLE_BINARY_SEMAPHORE | RTEMS_PRIORITY, |
---|
| 526 | RTEMS_NO_PRIORITY, |
---|
| 527 | &tty->rawInBuf.Semaphore); |
---|
| 528 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 529 | rtems_fatal_error_occurred (sc); |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | /* |
---|
| 533 | * Set default parameters |
---|
| 534 | */ |
---|
| 535 | tty->termios.c_iflag = BRKINT | ICRNL | IXON | IMAXBEL; |
---|
| 536 | tty->termios.c_oflag = OPOST | ONLCR | XTABS; |
---|
| 537 | tty->termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL; |
---|
| 538 | tty->termios.c_lflag = |
---|
| 539 | ISIG | ICANON | IEXTEN | ECHO | ECHOK | ECHOE | ECHOCTL; |
---|
| 540 | |
---|
| 541 | tty->termios.c_cc[VINTR] = '\003'; |
---|
| 542 | tty->termios.c_cc[VQUIT] = '\034'; |
---|
| 543 | tty->termios.c_cc[VERASE] = '\177'; |
---|
| 544 | tty->termios.c_cc[VKILL] = '\025'; |
---|
| 545 | tty->termios.c_cc[VEOF] = '\004'; |
---|
| 546 | tty->termios.c_cc[VEOL] = '\000'; |
---|
| 547 | tty->termios.c_cc[VEOL2] = '\000'; |
---|
| 548 | tty->termios.c_cc[VSTART] = '\021'; |
---|
| 549 | tty->termios.c_cc[VSTOP] = '\023'; |
---|
| 550 | tty->termios.c_cc[VSUSP] = '\032'; |
---|
| 551 | tty->termios.c_cc[VREPRINT] = '\022'; |
---|
| 552 | tty->termios.c_cc[VDISCARD] = '\017'; |
---|
| 553 | tty->termios.c_cc[VWERASE] = '\027'; |
---|
| 554 | tty->termios.c_cc[VLNEXT] = '\026'; |
---|
| 555 | |
---|
| 556 | /* start with no flow control, clear flow control flags */ |
---|
| 557 | tty->flow_ctrl = 0; |
---|
| 558 | /* |
---|
| 559 | * set low/highwater mark for XON/XOFF support |
---|
| 560 | */ |
---|
| 561 | tty->lowwater = tty->rawInBuf.Size * 1/2; |
---|
| 562 | tty->highwater = tty->rawInBuf.Size * 3/4; |
---|
| 563 | /* |
---|
| 564 | * Bump name characer |
---|
| 565 | */ |
---|
| 566 | if (c++ == 'z') |
---|
| 567 | c = 'a'; |
---|
| 568 | |
---|
| 569 | } |
---|
| 570 | args->iop->data1 = tty; |
---|
| 571 | if (!tty->refcount++) { |
---|
[a0fb29f] | 572 | if (tty->handler.first_open && |
---|
| 573 | !(*tty->handler.first_open)(tty, args)) { |
---|
| 574 | rtems_termios_destroy_tty(tty, args, false); |
---|
| 575 | return NULL; |
---|
| 576 | } |
---|
[c00b80c1] | 577 | |
---|
[6cc69f1] | 578 | /* |
---|
| 579 | * start I/O tasks, if needed |
---|
| 580 | */ |
---|
[ef8c00bc] | 581 | if (tty->handler.mode == TERMIOS_TASK_DRIVEN) { |
---|
[c00b80c1] | 582 | sc = rtems_task_start( |
---|
| 583 | tty->rxTaskId, rtems_termios_rxdaemon, (rtems_task_argument)tty); |
---|
[6cc69f1] | 584 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 585 | rtems_fatal_error_occurred (sc); |
---|
| 586 | |
---|
[c00b80c1] | 587 | sc = rtems_task_start( |
---|
| 588 | tty->txTaskId, rtems_termios_txdaemon, (rtems_task_argument)tty); |
---|
[6cc69f1] | 589 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 590 | rtems_fatal_error_occurred (sc); |
---|
| 591 | } |
---|
| 592 | } |
---|
[ef8c00bc] | 593 | |
---|
| 594 | return tty; |
---|
| 595 | } |
---|
| 596 | |
---|
| 597 | rtems_status_code |
---|
| 598 | rtems_termios_device_open( |
---|
| 599 | rtems_device_major_number major, |
---|
| 600 | rtems_device_minor_number minor, |
---|
| 601 | void *arg |
---|
| 602 | ) |
---|
| 603 | { |
---|
| 604 | rtems_status_code sc; |
---|
| 605 | rtems_termios_device_node *device_node; |
---|
| 606 | struct rtems_termios_tty *tty; |
---|
| 607 | |
---|
| 608 | sc = rtems_semaphore_obtain( |
---|
| 609 | rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 610 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 611 | return sc; |
---|
| 612 | |
---|
| 613 | device_node = rtems_termios_find_device_node (major, minor); |
---|
| 614 | if (device_node == NULL) { |
---|
| 615 | rtems_semaphore_release (rtems_termios_ttyMutex); |
---|
| 616 | return RTEMS_INVALID_ID; |
---|
| 617 | } |
---|
| 618 | |
---|
| 619 | tty = rtems_termios_open_tty( |
---|
| 620 | major, minor, arg, device_node->tty, device_node, NULL); |
---|
| 621 | if (tty == NULL) { |
---|
| 622 | rtems_semaphore_release (rtems_termios_ttyMutex); |
---|
| 623 | return RTEMS_NO_MEMORY; |
---|
| 624 | } |
---|
| 625 | |
---|
| 626 | rtems_semaphore_release (rtems_termios_ttyMutex); |
---|
| 627 | |
---|
| 628 | return RTEMS_SUCCESSFUL; |
---|
| 629 | } |
---|
| 630 | |
---|
| 631 | /* |
---|
| 632 | * Open a termios device |
---|
| 633 | */ |
---|
| 634 | rtems_status_code |
---|
| 635 | rtems_termios_open ( |
---|
| 636 | rtems_device_major_number major, |
---|
| 637 | rtems_device_minor_number minor, |
---|
| 638 | void *arg, |
---|
| 639 | const rtems_termios_callbacks *callbacks |
---|
| 640 | ) |
---|
| 641 | { |
---|
| 642 | rtems_status_code sc; |
---|
| 643 | struct rtems_termios_tty *tty; |
---|
| 644 | |
---|
| 645 | /* |
---|
| 646 | * See if the device has already been opened |
---|
| 647 | */ |
---|
| 648 | sc = rtems_semaphore_obtain( |
---|
| 649 | rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 650 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 651 | return sc; |
---|
| 652 | |
---|
| 653 | for (tty = rtems_termios_ttyHead ; tty != NULL ; tty = tty->forw) { |
---|
| 654 | if ((tty->major == major) && (tty->minor == minor)) |
---|
| 655 | break; |
---|
| 656 | } |
---|
| 657 | |
---|
| 658 | tty = rtems_termios_open_tty( |
---|
| 659 | major, minor, arg, tty, NULL, callbacks); |
---|
| 660 | if (tty == NULL) { |
---|
| 661 | rtems_semaphore_release (rtems_termios_ttyMutex); |
---|
| 662 | return RTEMS_NO_MEMORY; |
---|
| 663 | } |
---|
| 664 | |
---|
| 665 | if (tty->refcount == 1) { |
---|
| 666 | /* |
---|
| 667 | * link tty |
---|
| 668 | */ |
---|
| 669 | tty->forw = rtems_termios_ttyHead; |
---|
| 670 | tty->back = NULL; |
---|
| 671 | if (rtems_termios_ttyHead != NULL) |
---|
| 672 | rtems_termios_ttyHead->back = tty; |
---|
| 673 | rtems_termios_ttyHead = tty; |
---|
| 674 | if (rtems_termios_ttyTail == NULL) |
---|
| 675 | rtems_termios_ttyTail = tty; |
---|
| 676 | } |
---|
| 677 | |
---|
[6cc69f1] | 678 | rtems_semaphore_release (rtems_termios_ttyMutex); |
---|
[ef8c00bc] | 679 | |
---|
[6cc69f1] | 680 | return RTEMS_SUCCESSFUL; |
---|
[55e1322] | 681 | } |
---|
| 682 | |
---|
[b0da5796] | 683 | static void |
---|
| 684 | flushOutput (struct rtems_termios_tty *tty) |
---|
| 685 | { |
---|
[d50acdbb] | 686 | rtems_interrupt_lock_context lock_context; |
---|
[b0da5796] | 687 | |
---|
[d50acdbb] | 688 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[b0da5796] | 689 | tty->rawOutBuf.Tail = 0; |
---|
| 690 | tty->rawOutBuf.Head = 0; |
---|
[da02535] | 691 | tty->rawOutBufState = rob_idle; |
---|
[d50acdbb] | 692 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[b0da5796] | 693 | } |
---|
| 694 | |
---|
| 695 | static void |
---|
| 696 | flushInput (struct rtems_termios_tty *tty) |
---|
| 697 | { |
---|
[d50acdbb] | 698 | rtems_interrupt_lock_context lock_context; |
---|
[b0da5796] | 699 | |
---|
[d50acdbb] | 700 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[b0da5796] | 701 | tty->rawInBuf.Tail = 0; |
---|
| 702 | tty->rawInBuf.Head = 0; |
---|
[d50acdbb] | 703 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[b0da5796] | 704 | } |
---|
| 705 | |
---|
[ef8c00bc] | 706 | static void |
---|
| 707 | rtems_termios_close_tty (rtems_termios_tty *tty, void *arg) |
---|
[55e1322] | 708 | { |
---|
[6cc69f1] | 709 | if (--tty->refcount == 0) { |
---|
[a0fb29f] | 710 | rtems_termios_destroy_tty (tty, arg, true); |
---|
[ef8c00bc] | 711 | } |
---|
| 712 | } |
---|
| 713 | |
---|
| 714 | rtems_status_code |
---|
| 715 | rtems_termios_close (void *arg) |
---|
| 716 | { |
---|
| 717 | rtems_status_code sc; |
---|
| 718 | rtems_libio_open_close_args_t *args = arg; |
---|
| 719 | struct rtems_termios_tty *tty = args->iop->data1; |
---|
| 720 | |
---|
| 721 | sc = rtems_semaphore_obtain( |
---|
| 722 | rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 723 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 724 | rtems_fatal_error_occurred (sc); |
---|
| 725 | |
---|
| 726 | if (tty->refcount == 1) { |
---|
[6cc69f1] | 727 | if (tty->forw == NULL) { |
---|
| 728 | rtems_termios_ttyTail = tty->back; |
---|
| 729 | if ( rtems_termios_ttyTail != NULL ) { |
---|
| 730 | rtems_termios_ttyTail->forw = NULL; |
---|
| 731 | } |
---|
[c00b80c1] | 732 | } else { |
---|
[6cc69f1] | 733 | tty->forw->back = tty->back; |
---|
| 734 | } |
---|
[c00b80c1] | 735 | |
---|
[6cc69f1] | 736 | if (tty->back == NULL) { |
---|
| 737 | rtems_termios_ttyHead = tty->forw; |
---|
| 738 | if ( rtems_termios_ttyHead != NULL ) { |
---|
| 739 | rtems_termios_ttyHead->back = NULL; |
---|
| 740 | } |
---|
[c00b80c1] | 741 | } else { |
---|
[6cc69f1] | 742 | tty->back->forw = tty->forw; |
---|
| 743 | } |
---|
| 744 | } |
---|
[ef8c00bc] | 745 | |
---|
| 746 | rtems_termios_close_tty (tty, arg); |
---|
| 747 | |
---|
[6cc69f1] | 748 | rtems_semaphore_release (rtems_termios_ttyMutex); |
---|
[ef8c00bc] | 749 | |
---|
| 750 | return RTEMS_SUCCESSFUL; |
---|
| 751 | } |
---|
| 752 | |
---|
| 753 | rtems_status_code |
---|
| 754 | rtems_termios_device_close (void *arg) |
---|
| 755 | { |
---|
| 756 | rtems_status_code sc; |
---|
| 757 | rtems_libio_open_close_args_t *args = arg; |
---|
| 758 | struct rtems_termios_tty *tty = args->iop->data1; |
---|
| 759 | |
---|
| 760 | sc = rtems_semaphore_obtain( |
---|
| 761 | rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 762 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 763 | rtems_fatal_error_occurred (sc); |
---|
| 764 | |
---|
| 765 | rtems_termios_close_tty (tty, arg); |
---|
| 766 | |
---|
| 767 | rtems_semaphore_release (rtems_termios_ttyMutex); |
---|
| 768 | |
---|
[6cc69f1] | 769 | return RTEMS_SUCCESSFUL; |
---|
[55e1322] | 770 | } |
---|
| 771 | |
---|
[1f5d2ba] | 772 | rtems_status_code rtems_termios_bufsize ( |
---|
[96406152] | 773 | size_t cbufsize, |
---|
| 774 | size_t raw_input, |
---|
| 775 | size_t raw_output |
---|
[1f5d2ba] | 776 | ) |
---|
| 777 | { |
---|
| 778 | rtems_termios_cbufsize = cbufsize; |
---|
| 779 | rtems_termios_raw_input_size = raw_input; |
---|
| 780 | rtems_termios_raw_output_size = raw_output; |
---|
[b5825ab] | 781 | return RTEMS_SUCCESSFUL; |
---|
[1f5d2ba] | 782 | } |
---|
| 783 | |
---|
[50f32b11] | 784 | static void |
---|
[18040d3] | 785 | termios_set_flowctrl(struct rtems_termios_tty *tty) |
---|
| 786 | { |
---|
[d50acdbb] | 787 | rtems_interrupt_lock_context lock_context; |
---|
[50f32b11] | 788 | /* |
---|
| 789 | * check for flow control options to be switched off |
---|
[18040d3] | 790 | */ |
---|
| 791 | |
---|
| 792 | /* check for outgoing XON/XOFF flow control switched off */ |
---|
| 793 | if (( tty->flow_ctrl & FL_MDXON) && |
---|
| 794 | !(tty->termios.c_iflag & IXON)) { |
---|
| 795 | /* clear related flags in flow_ctrl */ |
---|
| 796 | tty->flow_ctrl &= ~(FL_MDXON | FL_ORCVXOF); |
---|
| 797 | |
---|
| 798 | /* has output been stopped due to received XOFF? */ |
---|
| 799 | if (tty->flow_ctrl & FL_OSTOP) { |
---|
| 800 | /* disable interrupts */ |
---|
[d50acdbb] | 801 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[18040d3] | 802 | tty->flow_ctrl &= ~FL_OSTOP; |
---|
| 803 | /* check for chars in output buffer (or rob_state?) */ |
---|
| 804 | if (tty->rawOutBufState != rob_idle) { |
---|
[c00b80c1] | 805 | /* if chars available, call write function... */ |
---|
[ef8c00bc] | 806 | (*tty->handler.write)( |
---|
| 807 | tty, &tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail],1); |
---|
[18040d3] | 808 | } |
---|
| 809 | /* reenable interrupts */ |
---|
[d50acdbb] | 810 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[18040d3] | 811 | } |
---|
| 812 | } |
---|
| 813 | /* check for incoming XON/XOFF flow control switched off */ |
---|
[c00b80c1] | 814 | if (( tty->flow_ctrl & FL_MDXOF) && !(tty->termios.c_iflag & IXOFF)) { |
---|
[18040d3] | 815 | /* clear related flags in flow_ctrl */ |
---|
| 816 | tty->flow_ctrl &= ~(FL_MDXOF); |
---|
| 817 | /* FIXME: what happens, if we had sent XOFF but not yet XON? */ |
---|
| 818 | tty->flow_ctrl &= ~(FL_ISNTXOF); |
---|
| 819 | } |
---|
| 820 | |
---|
| 821 | /* check for incoming RTS/CTS flow control switched off */ |
---|
[6cc69f1] | 822 | if (( tty->flow_ctrl & FL_MDRTS) && !(tty->termios.c_cflag & CRTSCTS)) { |
---|
[18040d3] | 823 | /* clear related flags in flow_ctrl */ |
---|
| 824 | tty->flow_ctrl &= ~(FL_MDRTS); |
---|
[50f32b11] | 825 | |
---|
[18040d3] | 826 | /* restart remote Tx, if it was stopped */ |
---|
[ef8c00bc] | 827 | if ((tty->flow_ctrl & FL_IRTSOFF) && |
---|
[a830cb8] | 828 | (tty->flow.start_remote_tx != NULL)) { |
---|
| 829 | tty->flow.start_remote_tx(tty); |
---|
[18040d3] | 830 | } |
---|
| 831 | tty->flow_ctrl &= ~(FL_IRTSOFF); |
---|
[50f32b11] | 832 | } |
---|
| 833 | |
---|
| 834 | /* |
---|
| 835 | * check for flow control options to be switched on |
---|
[18040d3] | 836 | */ |
---|
| 837 | /* check for incoming RTS/CTS flow control switched on */ |
---|
| 838 | if (tty->termios.c_cflag & CRTSCTS) { |
---|
| 839 | tty->flow_ctrl |= FL_MDRTS; |
---|
| 840 | } |
---|
| 841 | /* check for incoming XON/XOF flow control switched on */ |
---|
| 842 | if (tty->termios.c_iflag & IXOFF) { |
---|
| 843 | tty->flow_ctrl |= FL_MDXOF; |
---|
| 844 | } |
---|
| 845 | /* check for outgoing XON/XOF flow control switched on */ |
---|
| 846 | if (tty->termios.c_iflag & IXON) { |
---|
| 847 | tty->flow_ctrl |= FL_MDXON; |
---|
| 848 | } |
---|
| 849 | } |
---|
| 850 | |
---|
[55e1322] | 851 | rtems_status_code |
---|
| 852 | rtems_termios_ioctl (void *arg) |
---|
| 853 | { |
---|
[6cc69f1] | 854 | rtems_libio_ioctl_args_t *args = arg; |
---|
| 855 | struct rtems_termios_tty *tty = args->iop->data1; |
---|
| 856 | struct ttywakeup *wakeup = (struct ttywakeup *)args->buffer; |
---|
| 857 | rtems_status_code sc; |
---|
| 858 | |
---|
[5b045eb] | 859 | args->ioctl_return = 0; |
---|
[6cc69f1] | 860 | sc = rtems_semaphore_obtain (tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 861 | if (sc != RTEMS_SUCCESSFUL) { |
---|
| 862 | return sc; |
---|
| 863 | } |
---|
| 864 | switch (args->command) { |
---|
| 865 | default: |
---|
| 866 | if (rtems_termios_linesw[tty->t_line].l_ioctl != NULL) { |
---|
| 867 | sc = rtems_termios_linesw[tty->t_line].l_ioctl(tty,args); |
---|
| 868 | } |
---|
| 869 | else { |
---|
| 870 | sc = RTEMS_INVALID_NUMBER; |
---|
| 871 | } |
---|
| 872 | break; |
---|
| 873 | |
---|
| 874 | case RTEMS_IO_GET_ATTRIBUTES: |
---|
| 875 | *(struct termios *)args->buffer = tty->termios; |
---|
| 876 | break; |
---|
| 877 | |
---|
| 878 | case RTEMS_IO_SET_ATTRIBUTES: |
---|
| 879 | tty->termios = *(struct termios *)args->buffer; |
---|
| 880 | |
---|
| 881 | /* check for and process change in flow control options */ |
---|
| 882 | termios_set_flowctrl(tty); |
---|
| 883 | |
---|
| 884 | if (tty->termios.c_lflag & ICANON) { |
---|
| 885 | tty->rawInBufSemaphoreOptions = RTEMS_WAIT; |
---|
| 886 | tty->rawInBufSemaphoreTimeout = RTEMS_NO_TIMEOUT; |
---|
| 887 | tty->rawInBufSemaphoreFirstTimeout = RTEMS_NO_TIMEOUT; |
---|
[c00b80c1] | 888 | } else { |
---|
[6cc69f1] | 889 | tty->vtimeTicks = tty->termios.c_cc[VTIME] * |
---|
| 890 | rtems_clock_get_ticks_per_second() / 10; |
---|
| 891 | if (tty->termios.c_cc[VTIME]) { |
---|
| 892 | tty->rawInBufSemaphoreOptions = RTEMS_WAIT; |
---|
| 893 | tty->rawInBufSemaphoreTimeout = tty->vtimeTicks; |
---|
| 894 | if (tty->termios.c_cc[VMIN]) |
---|
| 895 | tty->rawInBufSemaphoreFirstTimeout = RTEMS_NO_TIMEOUT; |
---|
| 896 | else |
---|
| 897 | tty->rawInBufSemaphoreFirstTimeout = tty->vtimeTicks; |
---|
[c00b80c1] | 898 | } else { |
---|
[6cc69f1] | 899 | if (tty->termios.c_cc[VMIN]) { |
---|
| 900 | tty->rawInBufSemaphoreOptions = RTEMS_WAIT; |
---|
| 901 | tty->rawInBufSemaphoreTimeout = RTEMS_NO_TIMEOUT; |
---|
| 902 | tty->rawInBufSemaphoreFirstTimeout = RTEMS_NO_TIMEOUT; |
---|
[c00b80c1] | 903 | } else { |
---|
[6cc69f1] | 904 | tty->rawInBufSemaphoreOptions = RTEMS_NO_WAIT; |
---|
| 905 | } |
---|
| 906 | } |
---|
| 907 | } |
---|
[32fc6a3] | 908 | if (tty->handler.set_attributes) { |
---|
| 909 | sc = (*tty->handler.set_attributes)(tty, &tty->termios) ? |
---|
| 910 | RTEMS_SUCCESSFUL : RTEMS_IO_ERROR; |
---|
| 911 | } |
---|
[6cc69f1] | 912 | break; |
---|
| 913 | |
---|
| 914 | case RTEMS_IO_TCDRAIN: |
---|
| 915 | drainOutput (tty); |
---|
| 916 | break; |
---|
| 917 | |
---|
[b0da5796] | 918 | case RTEMS_IO_TCFLUSH: |
---|
| 919 | switch ((intptr_t) args->buffer) { |
---|
| 920 | case TCIFLUSH: |
---|
| 921 | flushInput (tty); |
---|
| 922 | break; |
---|
| 923 | case TCOFLUSH: |
---|
| 924 | flushOutput (tty); |
---|
| 925 | break; |
---|
| 926 | case TCIOFLUSH: |
---|
| 927 | flushOutput (tty); |
---|
| 928 | flushInput (tty); |
---|
| 929 | break; |
---|
| 930 | default: |
---|
| 931 | sc = RTEMS_INVALID_NAME; |
---|
| 932 | break; |
---|
| 933 | } |
---|
| 934 | break; |
---|
| 935 | |
---|
[6cc69f1] | 936 | case RTEMS_IO_SNDWAKEUP: |
---|
| 937 | tty->tty_snd = *wakeup; |
---|
| 938 | break; |
---|
| 939 | |
---|
| 940 | case RTEMS_IO_RCVWAKEUP: |
---|
| 941 | tty->tty_rcv = *wakeup; |
---|
| 942 | break; |
---|
| 943 | |
---|
| 944 | /* |
---|
| 945 | * FIXME: add various ioctl code handlers |
---|
| 946 | */ |
---|
[e2af631] | 947 | |
---|
| 948 | #if 1 /* FIXME */ |
---|
[6cc69f1] | 949 | case TIOCSETD: |
---|
| 950 | /* |
---|
| 951 | * close old line discipline |
---|
| 952 | */ |
---|
| 953 | if (rtems_termios_linesw[tty->t_line].l_close != NULL) { |
---|
| 954 | sc = rtems_termios_linesw[tty->t_line].l_close(tty); |
---|
| 955 | } |
---|
| 956 | tty->t_line=*(int*)(args->buffer); |
---|
| 957 | tty->t_sc = NULL; /* ensure that no more valid data */ |
---|
| 958 | /* |
---|
| 959 | * open new line discipline |
---|
| 960 | */ |
---|
| 961 | if (rtems_termios_linesw[tty->t_line].l_open != NULL) { |
---|
| 962 | sc = rtems_termios_linesw[tty->t_line].l_open(tty); |
---|
| 963 | } |
---|
| 964 | break; |
---|
| 965 | case TIOCGETD: |
---|
| 966 | *(int*)(args->buffer)=tty->t_line; |
---|
| 967 | break; |
---|
[e2af631] | 968 | #endif |
---|
[c00b80c1] | 969 | case FIONREAD: { |
---|
| 970 | int rawnc = tty->rawInBuf.Tail - tty->rawInBuf.Head; |
---|
| 971 | if ( rawnc < 0 ) |
---|
| 972 | rawnc += tty->rawInBuf.Size; |
---|
| 973 | /* Half guess that this is the right operation */ |
---|
| 974 | *(int *)args->buffer = tty->ccount - tty->cindex + rawnc; |
---|
[6cc69f1] | 975 | } |
---|
| 976 | break; |
---|
| 977 | } |
---|
[c00b80c1] | 978 | |
---|
[6cc69f1] | 979 | rtems_semaphore_release (tty->osem); |
---|
| 980 | return sc; |
---|
[55e1322] | 981 | } |
---|
| 982 | |
---|
[3654667f] | 983 | /* |
---|
| 984 | * Send as many chars at once as possible to device-specific code. |
---|
| 985 | * If transmitting==true then assume transmission is already running and |
---|
| 986 | * an explicit write(0) is needed if output has to stop for flow control. |
---|
| 987 | */ |
---|
| 988 | static unsigned int |
---|
| 989 | startXmit ( |
---|
| 990 | struct rtems_termios_tty *tty, |
---|
| 991 | unsigned int newTail, |
---|
| 992 | bool transmitting |
---|
| 993 | ) |
---|
| 994 | { |
---|
| 995 | unsigned int nToSend; |
---|
| 996 | |
---|
| 997 | tty->rawOutBufState = rob_busy; |
---|
| 998 | |
---|
| 999 | /* if XOFF was received, do not (re)start output */ |
---|
| 1000 | if (tty->flow_ctrl & FL_ORCVXOF) { |
---|
| 1001 | /* set flag, that output has been stopped */ |
---|
| 1002 | tty->flow_ctrl |= FL_OSTOP; |
---|
| 1003 | nToSend = 0; |
---|
| 1004 | /* stop transmitter */ |
---|
| 1005 | if (transmitting) { |
---|
| 1006 | (*tty->handler.write) (tty, NULL, 0); |
---|
| 1007 | } |
---|
| 1008 | } else { |
---|
| 1009 | /* when flow control XON or XOF, don't send blocks of data */ |
---|
| 1010 | /* to allow fast reaction on incoming flow ctrl and low latency*/ |
---|
| 1011 | /* for outgoing flow control */ |
---|
| 1012 | if (tty->flow_ctrl & (FL_MDXON | FL_MDXOF)) |
---|
| 1013 | nToSend = 1; |
---|
| 1014 | else if (newTail > tty->rawOutBuf.Head) |
---|
| 1015 | nToSend = tty->rawOutBuf.Size - newTail; |
---|
| 1016 | else |
---|
| 1017 | nToSend = tty->rawOutBuf.Head - newTail; |
---|
| 1018 | |
---|
| 1019 | (*tty->handler.write)( |
---|
| 1020 | tty, &tty->rawOutBuf.theBuf[newTail], nToSend); |
---|
| 1021 | } |
---|
| 1022 | |
---|
| 1023 | return nToSend; |
---|
| 1024 | } |
---|
| 1025 | |
---|
[d24ceb3] | 1026 | /* |
---|
| 1027 | * Send characters to device-specific code |
---|
| 1028 | */ |
---|
[e2af631] | 1029 | void |
---|
[ce92867b] | 1030 | rtems_termios_puts ( |
---|
[764d531] | 1031 | const void *_buf, size_t len, struct rtems_termios_tty *tty) |
---|
[d24ceb3] | 1032 | { |
---|
[1f3ce60] | 1033 | const char *buf = _buf; |
---|
[6cc69f1] | 1034 | unsigned int newHead; |
---|
[d50acdbb] | 1035 | rtems_interrupt_lock_context lock_context; |
---|
[6cc69f1] | 1036 | rtems_status_code sc; |
---|
| 1037 | |
---|
[ef8c00bc] | 1038 | if (tty->handler.mode == TERMIOS_POLLED) { |
---|
| 1039 | (*tty->handler.write)(tty, buf, len); |
---|
[6cc69f1] | 1040 | return; |
---|
| 1041 | } |
---|
[3654667f] | 1042 | |
---|
[6cc69f1] | 1043 | while (len) { |
---|
[3654667f] | 1044 | size_t nToCopy; |
---|
| 1045 | size_t nAvail; |
---|
| 1046 | |
---|
| 1047 | /* Check space for at least one char */ |
---|
| 1048 | newHead = tty->rawOutBuf.Head + 1; |
---|
| 1049 | if (newHead >= tty->rawOutBuf.Size) |
---|
| 1050 | newHead -= tty->rawOutBuf.Size; |
---|
| 1051 | |
---|
[d50acdbb] | 1052 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[6cc69f1] | 1053 | while (newHead == tty->rawOutBuf.Tail) { |
---|
| 1054 | tty->rawOutBufState = rob_wait; |
---|
[d50acdbb] | 1055 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[c00b80c1] | 1056 | sc = rtems_semaphore_obtain( |
---|
| 1057 | tty->rawOutBuf.Semaphore, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
[6cc69f1] | 1058 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1059 | rtems_fatal_error_occurred (sc); |
---|
[d50acdbb] | 1060 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[6cc69f1] | 1061 | } |
---|
[3654667f] | 1062 | |
---|
| 1063 | /* Determine free space up to current tail or end of ring buffer */ |
---|
| 1064 | nToCopy = len; |
---|
| 1065 | if (tty->rawOutBuf.Tail > tty->rawOutBuf.Head) { |
---|
| 1066 | /* Available space is contiguous from Head to Tail */ |
---|
| 1067 | nAvail = tty->rawOutBuf.Tail - tty->rawOutBuf.Head - 1; |
---|
| 1068 | } else { |
---|
| 1069 | /* Available space wraps at buffer end. To keep it simple, utilize |
---|
| 1070 | only the free space from Head to end during this iteration */ |
---|
| 1071 | nAvail = tty->rawOutBuf.Size - tty->rawOutBuf.Head; |
---|
| 1072 | /* Head may not touch Tail after wraparound */ |
---|
| 1073 | if (tty->rawOutBuf.Tail == 0) |
---|
| 1074 | nAvail--; |
---|
| 1075 | } |
---|
| 1076 | if (nToCopy > nAvail) |
---|
| 1077 | nToCopy = nAvail; |
---|
| 1078 | |
---|
| 1079 | /* To minimize latency, the memcpy could be done |
---|
| 1080 | * with interrupts enabled or with limit on nToCopy (TBD) |
---|
| 1081 | */ |
---|
| 1082 | memcpy(&tty->rawOutBuf.theBuf[tty->rawOutBuf.Head], buf, nToCopy); |
---|
| 1083 | |
---|
| 1084 | newHead = tty->rawOutBuf.Head + nToCopy; |
---|
| 1085 | if (newHead >= tty->rawOutBuf.Size) |
---|
| 1086 | newHead -= tty->rawOutBuf.Size; |
---|
[6cc69f1] | 1087 | tty->rawOutBuf.Head = newHead; |
---|
[3654667f] | 1088 | |
---|
[6cc69f1] | 1089 | if (tty->rawOutBufState == rob_idle) { |
---|
[3654667f] | 1090 | startXmit (tty, tty->rawOutBuf.Tail, false); |
---|
[6cc69f1] | 1091 | } |
---|
[3654667f] | 1092 | |
---|
[d50acdbb] | 1093 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[3654667f] | 1094 | |
---|
| 1095 | buf += nToCopy; |
---|
| 1096 | len -= nToCopy; |
---|
[6cc69f1] | 1097 | } |
---|
[d24ceb3] | 1098 | } |
---|
| 1099 | |
---|
[55e1322] | 1100 | /* |
---|
| 1101 | * Handle output processing |
---|
| 1102 | */ |
---|
| 1103 | static void |
---|
| 1104 | oproc (unsigned char c, struct rtems_termios_tty *tty) |
---|
| 1105 | { |
---|
[6cc69f1] | 1106 | int i; |
---|
| 1107 | |
---|
| 1108 | if (tty->termios.c_oflag & OPOST) { |
---|
| 1109 | switch (c) { |
---|
| 1110 | case '\n': |
---|
| 1111 | if (tty->termios.c_oflag & ONLRET) |
---|
| 1112 | tty->column = 0; |
---|
| 1113 | if (tty->termios.c_oflag & ONLCR) { |
---|
| 1114 | rtems_termios_puts ("\r", 1, tty); |
---|
| 1115 | tty->column = 0; |
---|
| 1116 | } |
---|
| 1117 | break; |
---|
| 1118 | |
---|
| 1119 | case '\r': |
---|
| 1120 | if ((tty->termios.c_oflag & ONOCR) && (tty->column == 0)) |
---|
| 1121 | return; |
---|
| 1122 | if (tty->termios.c_oflag & OCRNL) { |
---|
| 1123 | c = '\n'; |
---|
| 1124 | if (tty->termios.c_oflag & ONLRET) |
---|
| 1125 | tty->column = 0; |
---|
| 1126 | break; |
---|
| 1127 | } |
---|
| 1128 | tty->column = 0; |
---|
| 1129 | break; |
---|
| 1130 | |
---|
| 1131 | case '\t': |
---|
| 1132 | i = 8 - (tty->column & 7); |
---|
| 1133 | if ((tty->termios.c_oflag & TABDLY) == XTABS) { |
---|
| 1134 | tty->column += i; |
---|
| 1135 | rtems_termios_puts ( " ", i, tty); |
---|
| 1136 | return; |
---|
| 1137 | } |
---|
| 1138 | tty->column += i; |
---|
| 1139 | break; |
---|
| 1140 | |
---|
| 1141 | case '\b': |
---|
| 1142 | if (tty->column > 0) |
---|
| 1143 | tty->column--; |
---|
| 1144 | break; |
---|
| 1145 | |
---|
| 1146 | default: |
---|
| 1147 | if (tty->termios.c_oflag & OLCUC) |
---|
| 1148 | c = toupper(c); |
---|
| 1149 | if (!iscntrl(c)) |
---|
| 1150 | tty->column++; |
---|
| 1151 | break; |
---|
| 1152 | } |
---|
| 1153 | } |
---|
| 1154 | rtems_termios_puts (&c, 1, tty); |
---|
[55e1322] | 1155 | } |
---|
| 1156 | |
---|
| 1157 | rtems_status_code |
---|
| 1158 | rtems_termios_write (void *arg) |
---|
| 1159 | { |
---|
[6cc69f1] | 1160 | rtems_libio_rw_args_t *args = arg; |
---|
| 1161 | struct rtems_termios_tty *tty = args->iop->data1; |
---|
| 1162 | rtems_status_code sc; |
---|
| 1163 | |
---|
| 1164 | sc = rtems_semaphore_obtain (tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 1165 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1166 | return sc; |
---|
| 1167 | if (rtems_termios_linesw[tty->t_line].l_write != NULL) { |
---|
| 1168 | sc = rtems_termios_linesw[tty->t_line].l_write(tty,args); |
---|
| 1169 | rtems_semaphore_release (tty->osem); |
---|
| 1170 | return sc; |
---|
| 1171 | } |
---|
| 1172 | if (tty->termios.c_oflag & OPOST) { |
---|
| 1173 | uint32_t count = args->count; |
---|
| 1174 | char *buffer = args->buffer; |
---|
| 1175 | while (count--) |
---|
| 1176 | oproc (*buffer++, tty); |
---|
| 1177 | args->bytes_moved = args->count; |
---|
[c00b80c1] | 1178 | } else { |
---|
[6cc69f1] | 1179 | rtems_termios_puts (args->buffer, args->count, tty); |
---|
| 1180 | args->bytes_moved = args->count; |
---|
| 1181 | } |
---|
| 1182 | rtems_semaphore_release (tty->osem); |
---|
| 1183 | return sc; |
---|
[55e1322] | 1184 | } |
---|
| 1185 | |
---|
| 1186 | /* |
---|
| 1187 | * Echo a typed character |
---|
| 1188 | */ |
---|
| 1189 | static void |
---|
| 1190 | echo (unsigned char c, struct rtems_termios_tty *tty) |
---|
| 1191 | { |
---|
[c00b80c1] | 1192 | if ((tty->termios.c_lflag & ECHOCTL) && |
---|
| 1193 | iscntrl(c) && (c != '\t') && (c != '\n')) { |
---|
[6cc69f1] | 1194 | char echobuf[2]; |
---|
| 1195 | |
---|
| 1196 | echobuf[0] = '^'; |
---|
| 1197 | echobuf[1] = c ^ 0x40; |
---|
| 1198 | rtems_termios_puts (echobuf, 2, tty); |
---|
| 1199 | tty->column += 2; |
---|
[c00b80c1] | 1200 | } else { |
---|
[6cc69f1] | 1201 | oproc (c, tty); |
---|
| 1202 | } |
---|
[55e1322] | 1203 | } |
---|
| 1204 | |
---|
| 1205 | /* |
---|
| 1206 | * Erase a character or line |
---|
| 1207 | * FIXME: Needs support for WERASE and ECHOPRT. |
---|
| 1208 | * FIXME: Some of the tests should check for IEXTEN, too. |
---|
| 1209 | */ |
---|
| 1210 | static void |
---|
| 1211 | erase (struct rtems_termios_tty *tty, int lineFlag) |
---|
| 1212 | { |
---|
[6cc69f1] | 1213 | if (tty->ccount == 0) |
---|
| 1214 | return; |
---|
| 1215 | if (lineFlag) { |
---|
| 1216 | if (!(tty->termios.c_lflag & ECHO)) { |
---|
| 1217 | tty->ccount = 0; |
---|
| 1218 | return; |
---|
| 1219 | } |
---|
| 1220 | if (!(tty->termios.c_lflag & ECHOE)) { |
---|
| 1221 | tty->ccount = 0; |
---|
| 1222 | echo (tty->termios.c_cc[VKILL], tty); |
---|
| 1223 | if (tty->termios.c_lflag & ECHOK) |
---|
| 1224 | echo ('\n', tty); |
---|
| 1225 | return; |
---|
| 1226 | } |
---|
| 1227 | } |
---|
[c00b80c1] | 1228 | |
---|
[6cc69f1] | 1229 | while (tty->ccount) { |
---|
| 1230 | unsigned char c = tty->cbuf[--tty->ccount]; |
---|
| 1231 | |
---|
| 1232 | if (tty->termios.c_lflag & ECHO) { |
---|
| 1233 | if (!lineFlag && !(tty->termios.c_lflag & ECHOE)) { |
---|
| 1234 | echo (tty->termios.c_cc[VERASE], tty); |
---|
[c00b80c1] | 1235 | } else if (c == '\t') { |
---|
[6cc69f1] | 1236 | int col = tty->read_start_column; |
---|
| 1237 | int i = 0; |
---|
| 1238 | |
---|
| 1239 | /* |
---|
| 1240 | * Find the character before the tab |
---|
| 1241 | */ |
---|
| 1242 | while (i != tty->ccount) { |
---|
| 1243 | c = tty->cbuf[i++]; |
---|
| 1244 | if (c == '\t') { |
---|
| 1245 | col = (col | 7) + 1; |
---|
[c00b80c1] | 1246 | } else if (iscntrl (c)) { |
---|
[6cc69f1] | 1247 | if (tty->termios.c_lflag & ECHOCTL) |
---|
| 1248 | col += 2; |
---|
[c00b80c1] | 1249 | } else { |
---|
[6cc69f1] | 1250 | col++; |
---|
| 1251 | } |
---|
| 1252 | } |
---|
| 1253 | |
---|
| 1254 | /* |
---|
| 1255 | * Back up over the tab |
---|
| 1256 | */ |
---|
| 1257 | while (tty->column > col) { |
---|
| 1258 | rtems_termios_puts ("\b", 1, tty); |
---|
| 1259 | tty->column--; |
---|
| 1260 | } |
---|
| 1261 | } |
---|
| 1262 | else { |
---|
| 1263 | if (iscntrl (c) && (tty->termios.c_lflag & ECHOCTL)) { |
---|
| 1264 | rtems_termios_puts ("\b \b", 3, tty); |
---|
| 1265 | if (tty->column) |
---|
| 1266 | tty->column--; |
---|
| 1267 | } |
---|
| 1268 | if (!iscntrl (c) || (tty->termios.c_lflag & ECHOCTL)) { |
---|
| 1269 | rtems_termios_puts ("\b \b", 3, tty); |
---|
| 1270 | if (tty->column) |
---|
| 1271 | tty->column--; |
---|
| 1272 | } |
---|
| 1273 | } |
---|
| 1274 | } |
---|
| 1275 | if (!lineFlag) |
---|
| 1276 | break; |
---|
| 1277 | } |
---|
[55e1322] | 1278 | } |
---|
| 1279 | |
---|
| 1280 | /* |
---|
| 1281 | * Process a single input character |
---|
| 1282 | */ |
---|
| 1283 | static int |
---|
| 1284 | iproc (unsigned char c, struct rtems_termios_tty *tty) |
---|
| 1285 | { |
---|
[6cc69f1] | 1286 | if (tty->termios.c_iflag & ISTRIP) |
---|
| 1287 | c &= 0x7f; |
---|
[c00b80c1] | 1288 | |
---|
[6cc69f1] | 1289 | if (tty->termios.c_iflag & IUCLC) |
---|
| 1290 | c = tolower (c); |
---|
[c00b80c1] | 1291 | |
---|
[6cc69f1] | 1292 | if (c == '\r') { |
---|
| 1293 | if (tty->termios.c_iflag & IGNCR) |
---|
| 1294 | return 0; |
---|
| 1295 | if (tty->termios.c_iflag & ICRNL) |
---|
| 1296 | c = '\n'; |
---|
[c00b80c1] | 1297 | } else if ((c == '\n') && (tty->termios.c_iflag & INLCR)) { |
---|
[6cc69f1] | 1298 | c = '\r'; |
---|
| 1299 | } |
---|
[c00b80c1] | 1300 | |
---|
[6cc69f1] | 1301 | if ((c != '\0') && (tty->termios.c_lflag & ICANON)) { |
---|
| 1302 | if (c == tty->termios.c_cc[VERASE]) { |
---|
| 1303 | erase (tty, 0); |
---|
| 1304 | return 0; |
---|
| 1305 | } |
---|
| 1306 | else if (c == tty->termios.c_cc[VKILL]) { |
---|
| 1307 | erase (tty, 1); |
---|
| 1308 | return 0; |
---|
| 1309 | } |
---|
| 1310 | else if (c == tty->termios.c_cc[VEOF]) { |
---|
| 1311 | return 1; |
---|
[c00b80c1] | 1312 | } else if (c == '\n') { |
---|
[6cc69f1] | 1313 | if (tty->termios.c_lflag & (ECHO | ECHONL)) |
---|
| 1314 | echo (c, tty); |
---|
| 1315 | tty->cbuf[tty->ccount++] = c; |
---|
| 1316 | return 1; |
---|
[c00b80c1] | 1317 | } else if ((c == tty->termios.c_cc[VEOL]) || |
---|
| 1318 | (c == tty->termios.c_cc[VEOL2])) { |
---|
[6cc69f1] | 1319 | if (tty->termios.c_lflag & ECHO) |
---|
| 1320 | echo (c, tty); |
---|
| 1321 | tty->cbuf[tty->ccount++] = c; |
---|
| 1322 | return 1; |
---|
| 1323 | } |
---|
| 1324 | } |
---|
| 1325 | |
---|
| 1326 | /* |
---|
| 1327 | * FIXME: Should do IMAXBEL handling somehow |
---|
| 1328 | */ |
---|
| 1329 | if (tty->ccount < (CBUFSIZE-1)) { |
---|
| 1330 | if (tty->termios.c_lflag & ECHO) |
---|
| 1331 | echo (c, tty); |
---|
| 1332 | tty->cbuf[tty->ccount++] = c; |
---|
| 1333 | } |
---|
| 1334 | return 0; |
---|
[55e1322] | 1335 | } |
---|
| 1336 | |
---|
| 1337 | /* |
---|
| 1338 | * Process input character, with semaphore. |
---|
| 1339 | */ |
---|
| 1340 | static int |
---|
| 1341 | siproc (unsigned char c, struct rtems_termios_tty *tty) |
---|
| 1342 | { |
---|
[6cc69f1] | 1343 | int i; |
---|
| 1344 | |
---|
| 1345 | /* |
---|
| 1346 | * Obtain output semaphore if character will be echoed |
---|
| 1347 | */ |
---|
| 1348 | if (tty->termios.c_lflag & (ECHO|ECHOE|ECHOK|ECHONL|ECHOPRT|ECHOCTL|ECHOKE)) { |
---|
[a803e04d] | 1349 | rtems_status_code sc; |
---|
| 1350 | sc = rtems_semaphore_obtain (tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 1351 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1352 | rtems_fatal_error_occurred (sc); |
---|
[6cc69f1] | 1353 | i = iproc (c, tty); |
---|
[a803e04d] | 1354 | sc = rtems_semaphore_release (tty->osem); |
---|
| 1355 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1356 | rtems_fatal_error_occurred (sc); |
---|
[6cc69f1] | 1357 | } |
---|
| 1358 | else { |
---|
| 1359 | i = iproc (c, tty); |
---|
| 1360 | } |
---|
| 1361 | return i; |
---|
[55e1322] | 1362 | } |
---|
| 1363 | |
---|
| 1364 | /* |
---|
| 1365 | * Fill the input buffer by polling the device |
---|
| 1366 | */ |
---|
| 1367 | static rtems_status_code |
---|
| 1368 | fillBufferPoll (struct rtems_termios_tty *tty) |
---|
| 1369 | { |
---|
[6cc69f1] | 1370 | int n; |
---|
| 1371 | |
---|
| 1372 | if (tty->termios.c_lflag & ICANON) { |
---|
| 1373 | for (;;) { |
---|
[ef8c00bc] | 1374 | n = (*tty->handler.poll_read)(tty); |
---|
[6cc69f1] | 1375 | if (n < 0) { |
---|
| 1376 | rtems_task_wake_after (1); |
---|
[c00b80c1] | 1377 | } else { |
---|
[6cc69f1] | 1378 | if (siproc (n, tty)) |
---|
| 1379 | break; |
---|
| 1380 | } |
---|
| 1381 | } |
---|
[c00b80c1] | 1382 | } else { |
---|
[6cc69f1] | 1383 | rtems_interval then, now; |
---|
[c00b80c1] | 1384 | |
---|
[6cc69f1] | 1385 | then = rtems_clock_get_ticks_since_boot(); |
---|
| 1386 | for (;;) { |
---|
[ef8c00bc] | 1387 | n = (*tty->handler.poll_read)(tty); |
---|
[6cc69f1] | 1388 | if (n < 0) { |
---|
| 1389 | if (tty->termios.c_cc[VMIN]) { |
---|
| 1390 | if (tty->termios.c_cc[VTIME] && tty->ccount) { |
---|
| 1391 | now = rtems_clock_get_ticks_since_boot(); |
---|
| 1392 | if ((now - then) > tty->vtimeTicks) { |
---|
| 1393 | break; |
---|
| 1394 | } |
---|
| 1395 | } |
---|
[c00b80c1] | 1396 | } else { |
---|
[6cc69f1] | 1397 | if (!tty->termios.c_cc[VTIME]) |
---|
| 1398 | break; |
---|
| 1399 | now = rtems_clock_get_ticks_since_boot(); |
---|
| 1400 | if ((now - then) > tty->vtimeTicks) { |
---|
| 1401 | break; |
---|
| 1402 | } |
---|
| 1403 | } |
---|
| 1404 | rtems_task_wake_after (1); |
---|
[c00b80c1] | 1405 | } else { |
---|
[6cc69f1] | 1406 | siproc (n, tty); |
---|
| 1407 | if (tty->ccount >= tty->termios.c_cc[VMIN]) |
---|
| 1408 | break; |
---|
| 1409 | if (tty->termios.c_cc[VMIN] && tty->termios.c_cc[VTIME]) |
---|
| 1410 | then = rtems_clock_get_ticks_since_boot(); |
---|
| 1411 | } |
---|
| 1412 | } |
---|
| 1413 | } |
---|
| 1414 | return RTEMS_SUCCESSFUL; |
---|
[55e1322] | 1415 | } |
---|
| 1416 | |
---|
| 1417 | /* |
---|
| 1418 | * Fill the input buffer from the raw input queue |
---|
| 1419 | */ |
---|
| 1420 | static rtems_status_code |
---|
| 1421 | fillBufferQueue (struct rtems_termios_tty *tty) |
---|
| 1422 | { |
---|
[6cc69f1] | 1423 | rtems_interval timeout = tty->rawInBufSemaphoreFirstTimeout; |
---|
| 1424 | rtems_status_code sc; |
---|
[7f0c1fd5] | 1425 | int wait = 1; |
---|
[6cc69f1] | 1426 | |
---|
| 1427 | while ( wait ) { |
---|
| 1428 | /* |
---|
| 1429 | * Process characters read from raw queue |
---|
| 1430 | */ |
---|
| 1431 | while ((tty->rawInBuf.Head != tty->rawInBuf.Tail) && |
---|
[0e4e56ba] | 1432 | (tty->ccount < (CBUFSIZE-1))) { |
---|
[6cc69f1] | 1433 | unsigned char c; |
---|
| 1434 | unsigned int newHead; |
---|
| 1435 | |
---|
| 1436 | newHead = (tty->rawInBuf.Head + 1) % tty->rawInBuf.Size; |
---|
| 1437 | c = tty->rawInBuf.theBuf[newHead]; |
---|
| 1438 | tty->rawInBuf.Head = newHead; |
---|
| 1439 | if(((tty->rawInBuf.Tail-newHead+tty->rawInBuf.Size) |
---|
| 1440 | % tty->rawInBuf.Size) |
---|
| 1441 | < tty->lowwater) { |
---|
| 1442 | tty->flow_ctrl &= ~FL_IREQXOF; |
---|
| 1443 | /* if tx stopped and XON should be sent... */ |
---|
| 1444 | if (((tty->flow_ctrl & (FL_MDXON | FL_ISNTXOF)) |
---|
| 1445 | == (FL_MDXON | FL_ISNTXOF)) |
---|
| 1446 | && ((tty->rawOutBufState == rob_idle) |
---|
| 1447 | || (tty->flow_ctrl & FL_OSTOP))) { |
---|
| 1448 | /* XON should be sent now... */ |
---|
[ef8c00bc] | 1449 | (*tty->handler.write)( |
---|
| 1450 | tty, (void *)&(tty->termios.c_cc[VSTART]), 1); |
---|
[c00b80c1] | 1451 | } else if (tty->flow_ctrl & FL_MDRTS) { |
---|
[6cc69f1] | 1452 | tty->flow_ctrl &= ~FL_IRTSOFF; |
---|
| 1453 | /* activate RTS line */ |
---|
[a830cb8] | 1454 | if (tty->flow.start_remote_tx != NULL) { |
---|
| 1455 | tty->flow.start_remote_tx(tty); |
---|
[6cc69f1] | 1456 | } |
---|
| 1457 | } |
---|
| 1458 | } |
---|
| 1459 | |
---|
| 1460 | /* continue processing new character */ |
---|
| 1461 | if (tty->termios.c_lflag & ICANON) { |
---|
[c00b80c1] | 1462 | if (siproc (c, tty)) |
---|
[6cc69f1] | 1463 | wait = 0; |
---|
[c00b80c1] | 1464 | } else { |
---|
[6cc69f1] | 1465 | siproc (c, tty); |
---|
| 1466 | if (tty->ccount >= tty->termios.c_cc[VMIN]) |
---|
| 1467 | wait = 0; |
---|
| 1468 | } |
---|
| 1469 | timeout = tty->rawInBufSemaphoreTimeout; |
---|
| 1470 | } |
---|
| 1471 | |
---|
| 1472 | /* |
---|
| 1473 | * Wait for characters |
---|
| 1474 | */ |
---|
| 1475 | if ( wait ) { |
---|
[c00b80c1] | 1476 | sc = rtems_semaphore_obtain( |
---|
| 1477 | tty->rawInBuf.Semaphore, tty->rawInBufSemaphoreOptions, timeout); |
---|
[6cc69f1] | 1478 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1479 | break; |
---|
| 1480 | } |
---|
| 1481 | } |
---|
| 1482 | return RTEMS_SUCCESSFUL; |
---|
[55e1322] | 1483 | } |
---|
| 1484 | |
---|
| 1485 | rtems_status_code |
---|
| 1486 | rtems_termios_read (void *arg) |
---|
| 1487 | { |
---|
[6cc69f1] | 1488 | rtems_libio_rw_args_t *args = arg; |
---|
| 1489 | struct rtems_termios_tty *tty = args->iop->data1; |
---|
| 1490 | uint32_t count = args->count; |
---|
| 1491 | char *buffer = args->buffer; |
---|
| 1492 | rtems_status_code sc; |
---|
| 1493 | |
---|
| 1494 | sc = rtems_semaphore_obtain (tty->isem, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
---|
| 1495 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1496 | return sc; |
---|
[c00b80c1] | 1497 | |
---|
[6cc69f1] | 1498 | if (rtems_termios_linesw[tty->t_line].l_read != NULL) { |
---|
| 1499 | sc = rtems_termios_linesw[tty->t_line].l_read(tty,args); |
---|
| 1500 | tty->tty_rcvwakeup = 0; |
---|
| 1501 | rtems_semaphore_release (tty->isem); |
---|
| 1502 | return sc; |
---|
| 1503 | } |
---|
[c00b80c1] | 1504 | |
---|
[6cc69f1] | 1505 | if (tty->cindex == tty->ccount) { |
---|
| 1506 | tty->cindex = tty->ccount = 0; |
---|
| 1507 | tty->read_start_column = tty->column; |
---|
[ef8c00bc] | 1508 | if (tty->handler.poll_read != NULL && tty->handler.mode == TERMIOS_POLLED) |
---|
[6cc69f1] | 1509 | sc = fillBufferPoll (tty); |
---|
| 1510 | else |
---|
| 1511 | sc = fillBufferQueue (tty); |
---|
[c00b80c1] | 1512 | |
---|
[6cc69f1] | 1513 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1514 | tty->cindex = tty->ccount = 0; |
---|
| 1515 | } |
---|
| 1516 | while (count && (tty->cindex < tty->ccount)) { |
---|
| 1517 | *buffer++ = tty->cbuf[tty->cindex++]; |
---|
| 1518 | count--; |
---|
| 1519 | } |
---|
| 1520 | args->bytes_moved = args->count - count; |
---|
| 1521 | tty->tty_rcvwakeup = 0; |
---|
| 1522 | rtems_semaphore_release (tty->isem); |
---|
| 1523 | return sc; |
---|
[55e1322] | 1524 | } |
---|
| 1525 | |
---|
[e2af631] | 1526 | /* |
---|
| 1527 | * signal receive interrupt to rx daemon |
---|
| 1528 | * NOTE: This routine runs in the context of the |
---|
| 1529 | * device receive interrupt handler. |
---|
| 1530 | */ |
---|
| 1531 | void rtems_termios_rxirq_occured(struct rtems_termios_tty *tty) |
---|
| 1532 | { |
---|
[6cc69f1] | 1533 | /* |
---|
| 1534 | * send event to rx daemon task |
---|
| 1535 | */ |
---|
| 1536 | rtems_event_send(tty->rxTaskId,TERMIOS_RX_PROC_EVENT); |
---|
[e2af631] | 1537 | } |
---|
| 1538 | |
---|
[55e1322] | 1539 | /* |
---|
| 1540 | * Place characters on raw queue. |
---|
[d24ceb3] | 1541 | * NOTE: This routine runs in the context of the |
---|
| 1542 | * device receive interrupt handler. |
---|
[18040d3] | 1543 | * Returns the number of characters dropped because of overflow. |
---|
[55e1322] | 1544 | */ |
---|
[27dccae] | 1545 | int |
---|
[18124551] | 1546 | rtems_termios_enqueue_raw_characters (void *ttyp, const char *buf, int len) |
---|
[55e1322] | 1547 | { |
---|
[6cc69f1] | 1548 | struct rtems_termios_tty *tty = ttyp; |
---|
| 1549 | unsigned int newTail; |
---|
| 1550 | char c; |
---|
| 1551 | int dropped = 0; |
---|
| 1552 | bool flow_rcv = false; /* true, if flow control char received */ |
---|
[d50acdbb] | 1553 | rtems_interrupt_lock_context lock_context; |
---|
[6cc69f1] | 1554 | |
---|
| 1555 | if (rtems_termios_linesw[tty->t_line].l_rint != NULL) { |
---|
| 1556 | while (len--) { |
---|
| 1557 | c = *buf++; |
---|
| 1558 | rtems_termios_linesw[tty->t_line].l_rint(c,tty); |
---|
| 1559 | } |
---|
| 1560 | |
---|
| 1561 | /* |
---|
| 1562 | * check to see if rcv wakeup callback was set |
---|
| 1563 | */ |
---|
| 1564 | if (( !tty->tty_rcvwakeup ) && ( tty->tty_rcv.sw_pfn != NULL )) { |
---|
| 1565 | (*tty->tty_rcv.sw_pfn)(&tty->termios, tty->tty_rcv.sw_arg); |
---|
| 1566 | tty->tty_rcvwakeup = 1; |
---|
| 1567 | } |
---|
| 1568 | return 0; |
---|
| 1569 | } |
---|
| 1570 | |
---|
| 1571 | while (len--) { |
---|
| 1572 | c = *buf++; |
---|
| 1573 | /* FIXME: implement IXANY: any character restarts output */ |
---|
| 1574 | /* if incoming XON/XOFF controls outgoing stream: */ |
---|
| 1575 | if (tty->flow_ctrl & FL_MDXON) { |
---|
| 1576 | /* if received char is V_STOP and V_START (both are equal value) */ |
---|
| 1577 | if (c == tty->termios.c_cc[VSTOP]) { |
---|
| 1578 | if (c == tty->termios.c_cc[VSTART]) { |
---|
| 1579 | /* received VSTOP and VSTART==VSTOP? */ |
---|
| 1580 | /* then toggle "stop output" status */ |
---|
| 1581 | tty->flow_ctrl = tty->flow_ctrl ^ FL_ORCVXOF; |
---|
| 1582 | } |
---|
| 1583 | else { |
---|
| 1584 | /* VSTOP received (other code than VSTART) */ |
---|
| 1585 | /* stop output */ |
---|
| 1586 | tty->flow_ctrl |= FL_ORCVXOF; |
---|
| 1587 | } |
---|
| 1588 | flow_rcv = true; |
---|
| 1589 | } |
---|
| 1590 | else if (c == tty->termios.c_cc[VSTART]) { |
---|
| 1591 | /* VSTART received */ |
---|
| 1592 | /* restart output */ |
---|
| 1593 | tty->flow_ctrl &= ~FL_ORCVXOF; |
---|
| 1594 | flow_rcv = true; |
---|
| 1595 | } |
---|
| 1596 | } |
---|
| 1597 | if (flow_rcv) { |
---|
| 1598 | /* restart output according to FL_ORCVXOF flag */ |
---|
| 1599 | if ((tty->flow_ctrl & (FL_ORCVXOF | FL_OSTOP)) == FL_OSTOP) { |
---|
| 1600 | /* disable interrupts */ |
---|
[d50acdbb] | 1601 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[6cc69f1] | 1602 | tty->flow_ctrl &= ~FL_OSTOP; |
---|
| 1603 | /* check for chars in output buffer (or rob_state?) */ |
---|
| 1604 | if (tty->rawOutBufState != rob_idle) { |
---|
[c00b80c1] | 1605 | /* if chars available, call write function... */ |
---|
[ef8c00bc] | 1606 | (*tty->handler.write)( |
---|
| 1607 | tty, &tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail], 1); |
---|
[6cc69f1] | 1608 | } |
---|
| 1609 | /* reenable interrupts */ |
---|
[d50acdbb] | 1610 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[6cc69f1] | 1611 | } |
---|
[c00b80c1] | 1612 | } else { |
---|
[6cc69f1] | 1613 | newTail = (tty->rawInBuf.Tail + 1) % tty->rawInBuf.Size; |
---|
| 1614 | /* if chars_in_buffer > highwater */ |
---|
[d50acdbb] | 1615 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[6cc69f1] | 1616 | if ((((newTail - tty->rawInBuf.Head + tty->rawInBuf.Size) |
---|
| 1617 | % tty->rawInBuf.Size) > tty->highwater) && |
---|
| 1618 | !(tty->flow_ctrl & FL_IREQXOF)) { |
---|
| 1619 | /* incoming data stream should be stopped */ |
---|
| 1620 | tty->flow_ctrl |= FL_IREQXOF; |
---|
| 1621 | if ((tty->flow_ctrl & (FL_MDXOF | FL_ISNTXOF)) |
---|
| 1622 | == (FL_MDXOF ) ) { |
---|
| 1623 | if ((tty->flow_ctrl & FL_OSTOP) || |
---|
| 1624 | (tty->rawOutBufState == rob_idle)) { |
---|
| 1625 | /* if tx is stopped due to XOFF or out of data */ |
---|
| 1626 | /* call write function here */ |
---|
| 1627 | tty->flow_ctrl |= FL_ISNTXOF; |
---|
[ef8c00bc] | 1628 | (*tty->handler.write)(tty, |
---|
[6cc69f1] | 1629 | (void *)&(tty->termios.c_cc[VSTOP]), 1); |
---|
| 1630 | } |
---|
[c00b80c1] | 1631 | } else if ((tty->flow_ctrl & (FL_MDRTS | FL_IRTSOFF)) == (FL_MDRTS) ) { |
---|
[6cc69f1] | 1632 | tty->flow_ctrl |= FL_IRTSOFF; |
---|
| 1633 | /* deactivate RTS line */ |
---|
[a830cb8] | 1634 | if (tty->flow.stop_remote_tx != NULL) { |
---|
| 1635 | tty->flow.stop_remote_tx(tty); |
---|
[6cc69f1] | 1636 | } |
---|
| 1637 | } |
---|
| 1638 | } |
---|
| 1639 | |
---|
| 1640 | /* reenable interrupts */ |
---|
[d50acdbb] | 1641 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[6cc69f1] | 1642 | |
---|
| 1643 | if (newTail == tty->rawInBuf.Head) { |
---|
| 1644 | dropped++; |
---|
[c00b80c1] | 1645 | } else { |
---|
[6cc69f1] | 1646 | tty->rawInBuf.theBuf[newTail] = c; |
---|
| 1647 | tty->rawInBuf.Tail = newTail; |
---|
| 1648 | |
---|
| 1649 | /* |
---|
| 1650 | * check to see if rcv wakeup callback was set |
---|
| 1651 | */ |
---|
| 1652 | if (( !tty->tty_rcvwakeup ) && ( tty->tty_rcv.sw_pfn != NULL )) { |
---|
| 1653 | (*tty->tty_rcv.sw_pfn)(&tty->termios, tty->tty_rcv.sw_arg); |
---|
| 1654 | tty->tty_rcvwakeup = 1; |
---|
| 1655 | } |
---|
| 1656 | } |
---|
| 1657 | } |
---|
| 1658 | } |
---|
[c00b80c1] | 1659 | |
---|
[6cc69f1] | 1660 | tty->rawInBufDropped += dropped; |
---|
| 1661 | rtems_semaphore_release (tty->rawInBuf.Semaphore); |
---|
| 1662 | return dropped; |
---|
[55e1322] | 1663 | } |
---|
| 1664 | |
---|
[118a812] | 1665 | /* |
---|
[e2af631] | 1666 | * in task-driven mode, this function is called in Tx task context |
---|
| 1667 | * in interrupt-driven mode, this function is called in TxIRQ context |
---|
[118a812] | 1668 | */ |
---|
[4b41d3d4] | 1669 | static int |
---|
[e2af631] | 1670 | rtems_termios_refill_transmitter (struct rtems_termios_tty *tty) |
---|
[118a812] | 1671 | { |
---|
[58cde54] | 1672 | bool wakeUpWriterTask = false; |
---|
[6cc69f1] | 1673 | unsigned int newTail; |
---|
| 1674 | int nToSend; |
---|
[d50acdbb] | 1675 | rtems_interrupt_lock_context lock_context; |
---|
[6cc69f1] | 1676 | int len; |
---|
| 1677 | |
---|
[d50acdbb] | 1678 | rtems_termios_interrupt_lock_acquire (tty, &lock_context); |
---|
[7338299c] | 1679 | |
---|
[6cc69f1] | 1680 | /* check for XOF/XON to send */ |
---|
| 1681 | if ((tty->flow_ctrl & (FL_MDXOF | FL_IREQXOF | FL_ISNTXOF)) |
---|
| 1682 | == (FL_MDXOF | FL_IREQXOF)) { |
---|
| 1683 | /* XOFF should be sent now... */ |
---|
[ef8c00bc] | 1684 | (*tty->handler.write)(tty, (void *)&(tty->termios.c_cc[VSTOP]), 1); |
---|
[6cc69f1] | 1685 | |
---|
| 1686 | tty->t_dqlen--; |
---|
| 1687 | tty->flow_ctrl |= FL_ISNTXOF; |
---|
| 1688 | |
---|
| 1689 | nToSend = 1; |
---|
[c00b80c1] | 1690 | |
---|
| 1691 | } else if ((tty->flow_ctrl & (FL_IREQXOF | FL_ISNTXOF)) == FL_ISNTXOF) { |
---|
[6cc69f1] | 1692 | /* NOTE: send XON even, if no longer in XON/XOFF mode... */ |
---|
| 1693 | /* XON should be sent now... */ |
---|
| 1694 | /* |
---|
| 1695 | * FIXME: this .write call will generate another |
---|
| 1696 | * dequeue callback. This will advance the "Tail" in the data |
---|
| 1697 | * buffer, although the corresponding data is not yet out! |
---|
| 1698 | * Therefore the dequeue "length" should be reduced by 1 |
---|
| 1699 | */ |
---|
[ef8c00bc] | 1700 | (*tty->handler.write)(tty, (void *)&(tty->termios.c_cc[VSTART]), 1); |
---|
[6cc69f1] | 1701 | |
---|
| 1702 | tty->t_dqlen--; |
---|
| 1703 | tty->flow_ctrl &= ~FL_ISNTXOF; |
---|
| 1704 | |
---|
| 1705 | nToSend = 1; |
---|
[2a8713a] | 1706 | } else if ( tty->rawOutBuf.Head == tty->rawOutBuf.Tail ) { |
---|
| 1707 | /* |
---|
| 1708 | * buffer was empty |
---|
| 1709 | */ |
---|
| 1710 | if (tty->rawOutBufState == rob_wait) { |
---|
[6cc69f1] | 1711 | /* |
---|
[2a8713a] | 1712 | * this should never happen... |
---|
[6cc69f1] | 1713 | */ |
---|
[58cde54] | 1714 | wakeUpWriterTask = true; |
---|
[6cc69f1] | 1715 | } |
---|
| 1716 | |
---|
[ef8c00bc] | 1717 | (*tty->handler.write) (tty, NULL, 0); |
---|
[2a8713a] | 1718 | nToSend = 0; |
---|
| 1719 | } else { |
---|
[6cc69f1] | 1720 | len = tty->t_dqlen; |
---|
| 1721 | tty->t_dqlen = 0; |
---|
| 1722 | |
---|
| 1723 | newTail = (tty->rawOutBuf.Tail + len) % tty->rawOutBuf.Size; |
---|
| 1724 | tty->rawOutBuf.Tail = newTail; |
---|
| 1725 | if (tty->rawOutBufState == rob_wait) { |
---|
| 1726 | /* |
---|
| 1727 | * wake up any pending writer task |
---|
| 1728 | */ |
---|
[58cde54] | 1729 | wakeUpWriterTask = true; |
---|
[6cc69f1] | 1730 | } |
---|
[c00b80c1] | 1731 | |
---|
[6cc69f1] | 1732 | if (newTail == tty->rawOutBuf.Head) { |
---|
| 1733 | /* |
---|
| 1734 | * Buffer has become empty |
---|
| 1735 | */ |
---|
| 1736 | tty->rawOutBufState = rob_idle; |
---|
[ef8c00bc] | 1737 | (*tty->handler.write) (tty, NULL, 0); |
---|
[6cc69f1] | 1738 | nToSend = 0; |
---|
| 1739 | |
---|
| 1740 | /* |
---|
| 1741 | * check to see if snd wakeup callback was set |
---|
| 1742 | */ |
---|
| 1743 | if ( tty->tty_snd.sw_pfn != NULL) { |
---|
| 1744 | (*tty->tty_snd.sw_pfn)(&tty->termios, tty->tty_snd.sw_arg); |
---|
| 1745 | } |
---|
[c00b80c1] | 1746 | } else { |
---|
[6cc69f1] | 1747 | /* |
---|
[3654667f] | 1748 | * Buffer not empty, check flow control, start transmitter |
---|
[6cc69f1] | 1749 | */ |
---|
[3654667f] | 1750 | nToSend = startXmit (tty, newTail, true); |
---|
[6cc69f1] | 1751 | } |
---|
| 1752 | } |
---|
[58cde54] | 1753 | |
---|
[d50acdbb] | 1754 | rtems_termios_interrupt_lock_release (tty, &lock_context); |
---|
[7338299c] | 1755 | |
---|
[58cde54] | 1756 | if (wakeUpWriterTask) { |
---|
| 1757 | rtems_semaphore_release (tty->rawOutBuf.Semaphore); |
---|
| 1758 | } |
---|
| 1759 | |
---|
[6cc69f1] | 1760 | return nToSend; |
---|
[118a812] | 1761 | } |
---|
[e2af631] | 1762 | |
---|
| 1763 | /* |
---|
| 1764 | * Characters have been transmitted |
---|
| 1765 | * NOTE: This routine runs in the context of the |
---|
| 1766 | * device transmit interrupt handler. |
---|
| 1767 | * The second argument is the number of characters transmitted so far. |
---|
| 1768 | * This value will always be 1 for devices which generate an interrupt |
---|
[50f32b11] | 1769 | * for each transmitted character. |
---|
[e2af631] | 1770 | * It returns number of characters left to transmit |
---|
| 1771 | */ |
---|
| 1772 | int |
---|
| 1773 | rtems_termios_dequeue_characters (void *ttyp, int len) |
---|
| 1774 | { |
---|
[6cc69f1] | 1775 | struct rtems_termios_tty *tty = ttyp; |
---|
| 1776 | rtems_status_code sc; |
---|
| 1777 | |
---|
| 1778 | /* |
---|
| 1779 | * sum up character count already sent |
---|
| 1780 | */ |
---|
| 1781 | tty->t_dqlen += len; |
---|
| 1782 | |
---|
[ef8c00bc] | 1783 | if (tty->handler.mode == TERMIOS_TASK_DRIVEN) { |
---|
[6cc69f1] | 1784 | /* |
---|
| 1785 | * send wake up to transmitter task |
---|
| 1786 | */ |
---|
[c00b80c1] | 1787 | sc = rtems_event_send(tty->txTaskId, TERMIOS_TX_START_EVENT); |
---|
[6cc69f1] | 1788 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 1789 | rtems_fatal_error_occurred (sc); |
---|
| 1790 | return 0; /* nothing to output in IRQ... */ |
---|
| 1791 | } |
---|
| 1792 | |
---|
| 1793 | if (tty->t_line == PPPDISC ) { |
---|
| 1794 | /* |
---|
[ff7217b] | 1795 | * call PPP line discipline start function |
---|
[6cc69f1] | 1796 | */ |
---|
| 1797 | if (rtems_termios_linesw[tty->t_line].l_start != NULL) { |
---|
| 1798 | rtems_termios_linesw[tty->t_line].l_start(tty); |
---|
| 1799 | } |
---|
| 1800 | return 0; /* nothing to output in IRQ... */ |
---|
| 1801 | } |
---|
| 1802 | |
---|
| 1803 | return rtems_termios_refill_transmitter(tty); |
---|
[e2af631] | 1804 | } |
---|
| 1805 | |
---|
| 1806 | /* |
---|
| 1807 | * this task actually processes any transmit events |
---|
| 1808 | */ |
---|
| 1809 | static rtems_task rtems_termios_txdaemon(rtems_task_argument argument) |
---|
| 1810 | { |
---|
[6cc69f1] | 1811 | struct rtems_termios_tty *tty = (struct rtems_termios_tty *)argument; |
---|
| 1812 | rtems_event_set the_event; |
---|
| 1813 | |
---|
| 1814 | while (1) { |
---|
| 1815 | /* |
---|
| 1816 | * wait for rtems event |
---|
| 1817 | */ |
---|
[c00b80c1] | 1818 | rtems_event_receive( |
---|
| 1819 | (TERMIOS_TX_START_EVENT | TERMIOS_TX_TERMINATE_EVENT), |
---|
| 1820 | RTEMS_EVENT_ANY | RTEMS_WAIT, |
---|
| 1821 | RTEMS_NO_TIMEOUT, |
---|
| 1822 | &the_event |
---|
| 1823 | ); |
---|
[6cc69f1] | 1824 | if ((the_event & TERMIOS_TX_TERMINATE_EVENT) != 0) { |
---|
| 1825 | tty->txTaskId = 0; |
---|
| 1826 | rtems_task_delete(RTEMS_SELF); |
---|
| 1827 | } |
---|
[c00b80c1] | 1828 | |
---|
| 1829 | /* |
---|
| 1830 | * call any line discipline start function |
---|
| 1831 | */ |
---|
| 1832 | if (rtems_termios_linesw[tty->t_line].l_start != NULL) { |
---|
| 1833 | rtems_termios_linesw[tty->t_line].l_start(tty); |
---|
[ff7217b] | 1834 | |
---|
| 1835 | if (tty->t_line == PPPDISC) { |
---|
| 1836 | /* |
---|
| 1837 | * Do not call rtems_termios_refill_transmitter() in this case similar |
---|
| 1838 | * to rtems_termios_dequeue_characters(). |
---|
| 1839 | */ |
---|
| 1840 | continue; |
---|
| 1841 | } |
---|
[6cc69f1] | 1842 | } |
---|
[c00b80c1] | 1843 | |
---|
| 1844 | /* |
---|
| 1845 | * try to push further characters to device |
---|
| 1846 | */ |
---|
| 1847 | rtems_termios_refill_transmitter(tty); |
---|
[6cc69f1] | 1848 | } |
---|
[e2af631] | 1849 | } |
---|
| 1850 | |
---|
| 1851 | /* |
---|
| 1852 | * this task actually processes any receive events |
---|
| 1853 | */ |
---|
| 1854 | static rtems_task rtems_termios_rxdaemon(rtems_task_argument argument) |
---|
| 1855 | { |
---|
[6cc69f1] | 1856 | struct rtems_termios_tty *tty = (struct rtems_termios_tty *)argument; |
---|
| 1857 | rtems_event_set the_event; |
---|
| 1858 | int c; |
---|
| 1859 | char c_buf; |
---|
[c00b80c1] | 1860 | |
---|
[6cc69f1] | 1861 | while (1) { |
---|
| 1862 | /* |
---|
| 1863 | * wait for rtems event |
---|
| 1864 | */ |
---|
[c00b80c1] | 1865 | rtems_event_receive( |
---|
| 1866 | (TERMIOS_RX_PROC_EVENT | TERMIOS_RX_TERMINATE_EVENT), |
---|
| 1867 | RTEMS_EVENT_ANY | RTEMS_WAIT, |
---|
| 1868 | RTEMS_NO_TIMEOUT, |
---|
| 1869 | &the_event |
---|
| 1870 | ); |
---|
[6cc69f1] | 1871 | if ((the_event & TERMIOS_RX_TERMINATE_EVENT) != 0) { |
---|
| 1872 | tty->rxTaskId = 0; |
---|
| 1873 | rtems_task_delete(RTEMS_SELF); |
---|
| 1874 | } |
---|
[c00b80c1] | 1875 | |
---|
| 1876 | /* |
---|
| 1877 | * do something |
---|
| 1878 | */ |
---|
[ef8c00bc] | 1879 | c = tty->handler.poll_read(tty); |
---|
[c00b80c1] | 1880 | if (c != EOF) { |
---|
[6cc69f1] | 1881 | /* |
---|
[ef8c00bc] | 1882 | * poll_read did call enqueue on its own |
---|
[6cc69f1] | 1883 | */ |
---|
[c00b80c1] | 1884 | c_buf = c; |
---|
| 1885 | rtems_termios_enqueue_raw_characters ( tty,&c_buf,1); |
---|
[6cc69f1] | 1886 | } |
---|
| 1887 | } |
---|
[e2af631] | 1888 | } |
---|