--- /dev/null
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2014 Kumar Abhishek <abhishek@theembeddedkitchen.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef BEAGLELOGIC_H_
+#define BEAGLELOGIC_H_
+
+#include <fcntl.h>
+
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/ioctl.h>
+
+#include <stdlib.h>
+
+#include <unistd.h>
+
+/* BeagleLogic device node name */
+#define BEAGLELOGIC_DEV_NODE "/dev/beaglelogic"
+#define BEAGLELOGIC_SYSFS_ATTR(a) "/sys/devices/virtual/misc/beaglelogic/"\
+ __STRING(a)
+
+/* Reproduced verbatim from beaglelogic.h in the kernel tree until the kernel
+ * module hits the mainline. Contains the ABI, so DO NOT TOUCH this section */
+
+/* ioctl calls that can be issued on /dev/beaglelogic */
+#define IOCTL_BL_GET_VERSION _IOR('k', 0x20, uint32_t)
+
+#define IOCTL_BL_GET_SAMPLE_RATE _IOR('k', 0x21, uint32_t)
+#define IOCTL_BL_SET_SAMPLE_RATE _IOW('k', 0x21, uint32_t)
+
+#define IOCTL_BL_GET_SAMPLE_UNIT _IOR('k', 0x22, uint32_t)
+#define IOCTL_BL_SET_SAMPLE_UNIT _IOW('k', 0x22, uint32_t)
+
+#define IOCTL_BL_GET_TRIGGER_FLAGS _IOR('k', 0x23, uint32_t)
+#define IOCTL_BL_SET_TRIGGER_FLAGS _IOW('k', 0x23, uint32_t)
+
+#define IOCTL_BL_CACHE_INVALIDATE _IO('k', 0x25)
+
+#define IOCTL_BL_GET_BUFFER_SIZE _IOR('k', 0x26, uint32_t)
+#define IOCTL_BL_SET_BUFFER_SIZE _IOW('k', 0x26, uint32_t)
+
+#define IOCTL_BL_GET_BUFUNIT_SIZE _IOR('k', 0x27, uint32_t)
+
+#define IOCTL_BL_FILL_TEST_PATTERN _IO('k', 0x28)
+
+#define IOCTL_BL_START _IO('k', 0x29)
+#define IOCTL_BL_STOP _IO('k', 0x2A)
+
+/* Possible States of BeagleLogic */
+enum beaglelogic_states {
+ STATE_BL_DISABLED, /* Powered off (at module start) */
+ STATE_BL_INITIALIZED, /* Powered on */
+ STATE_BL_MEMALLOCD, /* Buffers allocated */
+ STATE_BL_ARMED, /* All Buffers DMA-mapped and configuration done */
+ STATE_BL_RUNNING, /* Data being captured */
+ STATE_BL_REQUEST_STOP, /* Stop requested */
+ STATE_BL_ERROR /* Buffer overrun */
+};
+
+/* Setting attributes */
+enum beaglelogic_triggerflags {
+ BL_TRIGGERFLAGS_ONESHOT = 0,
+ BL_TRIGGERFLAGS_CONTINUOUS
+};
+
+/* Possible sample unit / formats */
+enum beaglelogic_sampleunit {
+ BL_SAMPLEUNIT_16_BITS = 0,
+ BL_SAMPLEUNIT_8_BITS
+};
+/* END beaglelogic.h */
+
+/* For all the functions below:
+ * Parameters:
+ * devc : Device context structure to operate on
+ * Returns:
+ * SR_OK or SR_ERR
+ */
+
+SR_PRIV int beaglelogic_open_nonblock(struct dev_context *devc);
+SR_PRIV int beaglelogic_close(struct dev_context *devc);
+
+SR_PRIV int beaglelogic_get_buffersize(struct dev_context *devc);
+SR_PRIV int beaglelogic_set_buffersize(struct dev_context *devc);
+
+SR_PRIV int beaglelogic_get_samplerate(struct dev_context *devc);
+SR_PRIV int beaglelogic_set_samplerate(struct dev_context *devc);
+
+SR_PRIV int beaglelogic_get_sampleunit(struct dev_context *devc);
+SR_PRIV int beaglelogic_set_sampleunit(struct dev_context *devc);
+
+SR_PRIV int beaglelogic_get_triggerflags(struct dev_context *devc);
+SR_PRIV int beaglelogic_set_triggerflags(struct dev_context *devc);
+
+/* Start and stop the capture operation */
+SR_PRIV int beaglelogic_start(struct dev_context *devc);
+SR_PRIV int beaglelogic_stop(struct dev_context *devc);
+
+/* Get the last error size */
+SR_PRIV int beaglelogic_getlasterror(struct dev_context *devc);
+
+/* Gets the unit size of the capture buffer (usually 4 or 8 MB) */
+SR_PRIV int beaglelogic_get_bufunitsize(struct dev_context *devc);
+
+SR_PRIV int beaglelogic_mmap(struct dev_context *devc);
+SR_PRIV int beaglelogic_munmap(struct dev_context *devc);
+
+/* Sources */
+SR_PRIV inline int beaglelogic_open_nonblock(struct dev_context *devc) {
+ devc->fd = open(BEAGLELOGIC_DEV_NODE, O_RDONLY | O_NONBLOCK);
+ return (devc->fd == -1 ? SR_ERR : SR_OK);
+}
+
+SR_PRIV inline int beaglelogic_close(struct dev_context *devc) {
+ return close(devc->fd);
+}
+
+SR_PRIV inline int beaglelogic_get_buffersize(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_GET_BUFFER_SIZE, &devc->buffersize);
+}
+
+SR_PRIV inline int beaglelogic_set_buffersize(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_SET_BUFFER_SIZE, devc->buffersize);
+}
+
+/* This is treated differently as it gets a uint64_t while a uint32_t is read */
+SR_PRIV inline int beaglelogic_get_samplerate(struct dev_context *devc) {
+ uint32_t arg, err;
+ err = ioctl(devc->fd, IOCTL_BL_GET_SAMPLE_RATE, &arg);
+ devc->cur_samplerate = arg;
+ return err;
+}
+
+SR_PRIV inline int beaglelogic_set_samplerate(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_SET_SAMPLE_RATE,
+ (uint32_t)devc->cur_samplerate);
+}
+
+SR_PRIV inline int beaglelogic_get_sampleunit(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_GET_SAMPLE_UNIT, &devc->sampleunit);
+}
+
+SR_PRIV inline int beaglelogic_set_sampleunit(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_SET_SAMPLE_UNIT, devc->sampleunit);
+}
+
+SR_PRIV inline int beaglelogic_get_triggerflags(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_GET_TRIGGER_FLAGS, &devc->triggerflags);
+}
+
+SR_PRIV inline int beaglelogic_set_triggerflags(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_SET_TRIGGER_FLAGS, devc->triggerflags);
+}
+
+SR_PRIV int beaglelogic_getlasterror(struct dev_context *devc) {
+ int fd;
+ char buf[16];
+ int ret;
+
+ if ((fd = open(BEAGLELOGIC_SYSFS_ATTR(lasterror), O_RDONLY)) == -1)
+ return SR_ERR;
+
+ if ((ret = read(fd, buf, 16)) < 0)
+ return SR_ERR;
+
+ close(fd);
+ devc->last_error = strtoul(buf, NULL, 10);
+
+ return SR_OK;
+}
+
+SR_PRIV inline int beaglelogic_start(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_START);
+}
+
+SR_PRIV inline int beaglelogic_stop(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_STOP);
+}
+
+SR_PRIV int beaglelogic_get_bufunitsize(struct dev_context *devc) {
+ return ioctl(devc->fd, IOCTL_BL_GET_BUFUNIT_SIZE, &devc->bufunitsize);
+}
+
+SR_PRIV int beaglelogic_mmap(struct dev_context *devc) {
+ if (!devc->buffersize)
+ beaglelogic_get_buffersize(devc);
+ devc->sample_buf = mmap(NULL, devc->buffersize,
+ PROT_READ, MAP_SHARED, devc->fd, 0);
+ return (devc->sample_buf == MAP_FAILED ? -1 : SR_OK);
+}
+
+SR_PRIV int beaglelogic_munmap(struct dev_context *devc) {
+ return munmap(devc->sample_buf, devc->buffersize);
+}
+
+#endif /* BEAGLELOGIC_H_ */
projects / libsigrok.git / blobdiff