2 * This file is part of the libsigrok project.
4 * Copyright (C) 2014-17 Kumar Abhishek <abhishek@theembeddedkitchen.net>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "beaglelogic.h"
23 static int beaglelogic_open_nonblock(struct dev_context *devc) {
24 devc->fd = open(BEAGLELOGIC_DEV_NODE, O_RDONLY | O_NONBLOCK);
25 return (devc->fd == -1 ? SR_ERR : SR_OK);
28 static int beaglelogic_close(struct dev_context *devc) {
29 return close(devc->fd);
32 static int beaglelogic_get_buffersize(struct dev_context *devc) {
33 return ioctl(devc->fd, IOCTL_BL_GET_BUFFER_SIZE, &devc->buffersize);
36 static int beaglelogic_set_buffersize(struct dev_context *devc) {
37 return ioctl(devc->fd, IOCTL_BL_SET_BUFFER_SIZE, devc->buffersize);
40 /* This is treated differently as it gets a uint64_t while a uint32_t is read */
41 static int beaglelogic_get_samplerate(struct dev_context *devc) {
43 err = ioctl(devc->fd, IOCTL_BL_GET_SAMPLE_RATE, &arg);
44 devc->cur_samplerate = arg;
48 static int beaglelogic_set_samplerate(struct dev_context *devc) {
49 return ioctl(devc->fd, IOCTL_BL_SET_SAMPLE_RATE,
50 (uint32_t)devc->cur_samplerate);
53 static int beaglelogic_get_sampleunit(struct dev_context *devc) {
54 return ioctl(devc->fd, IOCTL_BL_GET_SAMPLE_UNIT, &devc->sampleunit);
57 static int beaglelogic_set_sampleunit(struct dev_context *devc) {
58 return ioctl(devc->fd, IOCTL_BL_SET_SAMPLE_UNIT, devc->sampleunit);
61 static int beaglelogic_get_triggerflags(struct dev_context *devc) {
62 return ioctl(devc->fd, IOCTL_BL_GET_TRIGGER_FLAGS, &devc->triggerflags);
65 static int beaglelogic_set_triggerflags(struct dev_context *devc) {
66 return ioctl(devc->fd, IOCTL_BL_SET_TRIGGER_FLAGS, devc->triggerflags);
69 static int beaglelogic_get_lasterror(struct dev_context *devc) {
74 if ((fd = open(BEAGLELOGIC_SYSFS_ATTR(lasterror), O_RDONLY)) == -1)
77 if ((ret = read(fd, buf, 16)) < 0)
81 devc->last_error = strtoul(buf, NULL, 10);
86 static int beaglelogic_start(struct dev_context *devc) {
87 return ioctl(devc->fd, IOCTL_BL_START);
90 static int beaglelogic_stop(struct dev_context *devc) {
91 return ioctl(devc->fd, IOCTL_BL_STOP);
94 static int beaglelogic_get_bufunitsize(struct dev_context *devc) {
95 return ioctl(devc->fd, IOCTL_BL_GET_BUFUNIT_SIZE, &devc->bufunitsize);
98 static int beaglelogic_set_bufunitsize(struct dev_context *devc) {
99 return ioctl(devc->fd, IOCTL_BL_SET_BUFUNIT_SIZE, devc->bufunitsize);
102 static int beaglelogic_mmap(struct dev_context *devc) {
103 if (!devc->buffersize)
104 beaglelogic_get_buffersize(devc);
105 devc->sample_buf = mmap(NULL, devc->buffersize,
106 PROT_READ, MAP_SHARED, devc->fd, 0);
107 return (devc->sample_buf == MAP_FAILED ? -1 : SR_OK);
110 static int beaglelogic_munmap(struct dev_context *devc) {
111 return munmap(devc->sample_buf, devc->buffersize);
114 SR_PRIV const struct beaglelogic_ops beaglelogic_native_ops = {
115 .open = beaglelogic_open_nonblock,
116 .close = beaglelogic_close,
117 .get_buffersize = beaglelogic_get_buffersize,
118 .set_buffersize = beaglelogic_set_buffersize,
119 .get_samplerate = beaglelogic_get_samplerate,
120 .set_samplerate = beaglelogic_set_samplerate,
121 .get_sampleunit = beaglelogic_get_sampleunit,
122 .set_sampleunit = beaglelogic_set_sampleunit,
123 .get_triggerflags = beaglelogic_get_triggerflags,
124 .set_triggerflags = beaglelogic_set_triggerflags,
125 .start = beaglelogic_start,
126 .stop = beaglelogic_stop,
127 .get_lasterror = beaglelogic_get_lasterror,
128 .get_bufunitsize = beaglelogic_get_bufunitsize,
129 .set_bufunitsize = beaglelogic_set_bufunitsize,
130 .mmap = beaglelogic_mmap,
131 .munmap = beaglelogic_munmap,