| 1 | /*
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| 2 | * Copyright (c) 2017 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #include <async.h>
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| 30 | #include <errno.h>
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| 31 | #include <io/serial.h>
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| 32 | #include <ipc/serial_ctl.h>
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| 33 | #include <ipc/services.h>
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| 34 | #include <stdlib.h>
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| 35 |
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| 36 | /** Open serial port device.
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| 37 | *
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| 38 | * @param sess Session with the serial port device
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| 39 | * @param rchardev Place to store pointer to the new serial port device structure
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| 40 | *
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| 41 | * @return EOK on success, ENOMEM if out of memory, EIO on I/O error
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| 42 | */
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| 43 | int serial_open(async_sess_t *sess, serial_t **rserial)
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| 44 | {
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| 45 | serial_t *serial;
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| 46 |
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| 47 | serial = calloc(1, sizeof(serial_t));
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| 48 | if (serial == NULL)
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| 49 | return ENOMEM;
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| 50 |
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| 51 | serial->sess = sess;
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| 52 | *rserial = serial;
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| 53 |
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| 54 | return EOK;
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| 55 | }
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| 56 |
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| 57 | /** Close serial port device.
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| 58 | *
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| 59 | * Frees the serial port device structure. The underlying session is
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| 60 | * not affected.
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| 61 | *
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| 62 | * @param serial Serial port device or @c NULL
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| 63 | */
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| 64 | void serial_close(serial_t *serial)
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| 65 | {
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| 66 | free(serial);
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| 67 | }
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| 68 |
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| 69 | /** Set serial port communication properties. */
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| 70 | int serial_set_comm_props(serial_t *serial, unsigned rate,
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| 71 | serial_parity_t parity, unsigned datab, unsigned stopb)
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| 72 | {
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| 73 | async_exch_t *exch = async_exchange_begin(serial->sess);
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| 74 |
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| 75 | int rc = async_req_4_0(exch, SERIAL_SET_COM_PROPS, rate, parity,
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| 76 | datab, stopb);
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| 77 |
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| 78 | async_exchange_end(exch);
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| 79 | return rc;
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| 80 | }
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| 81 |
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| 82 | /** Get serial port communication properties. */
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| 83 | int serial_get_comm_props(serial_t *serial, unsigned *rrate,
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| 84 | serial_parity_t *rparity, unsigned *rdatab, unsigned *rstopb)
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| 85 | {
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| 86 | async_exch_t *exch = async_exchange_begin(serial->sess);
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| 87 | sysarg_t rate, parity, datab, stopb;
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| 88 |
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| 89 | int rc = async_req_0_4(exch, SERIAL_GET_COM_PROPS, &rate, &parity,
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| 90 | &datab, &stopb);
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| 91 |
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| 92 | async_exchange_end(exch);
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| 93 | if (rc != EOK)
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| 94 | return rc;
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| 95 |
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| 96 | *rrate = rate;
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| 97 | *rparity = parity;
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| 98 | *rdatab = datab;
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| 99 | *rstopb = stopb;
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| 100 |
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| 101 | return EOK;
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| 102 | }
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| 103 |
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| 104 | /** @}
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| 105 | */
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