libsigrok/hardware/brymen-bm86x/api.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2014 Aurelien Jacobs <aurel@gnuage.org>
*
* 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/>.
*/
#include "protocol.h"
#define BRYMEN_BC86X "0820.0001"
static const int32_t hwopts[] = {
SR_CONF_CONN,
};
static const int32_t hwcaps[] = {
SR_CONF_MULTIMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_LIMIT_MSEC,
SR_CONF_CONTINUOUS,
};
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SR_PRIV struct sr_dev_driver brymen_bm86x_driver_info;
static struct sr_dev_driver *di = &brymen_bm86x_driver_info;
static int init(struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
static GSList *scan(GSList *options)
{
GSList *usb_devices, *devices, *l;
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struct drv_context *drvc;
struct dev_context *devc;
struct sr_dev_inst *sdi;
struct sr_usb_dev_inst *usb;
struct sr_config *src;
struct sr_channel *ch;
const char *conn;
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drvc = di->priv;
drvc->instances = NULL;
conn = BRYMEN_BC86X;
for (l = options; l; l = l->next) {
src = l->data;
switch (src->key) {
case SR_CONF_CONN:
conn = g_variant_get_string(src->data, NULL);
break;
}
}
devices = NULL;
if (!(usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn))) {
g_slist_free_full(usb_devices, g_free);
return NULL;
}
for (l = usb_devices; l; l = l->next) {
usb = l->data;
if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
"Brymen", "BM869", NULL))) {
sr_err("sr_dev_inst_new returned NULL.");
return NULL;
}
if (!(devc = g_try_malloc0(sizeof(*devc)))) {
sr_err("Device context malloc failed.");
return NULL;
}
sdi->priv = devc;
sdi->driver = di;
if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P1")))
return NULL;
sdi->channels = g_slist_append(sdi->channels, ch);
if (!(ch = sr_channel_new(0, SR_CHANNEL_ANALOG, TRUE, "P2")))
return NULL;
sdi->channels = g_slist_append(sdi->channels, ch);
sdi->inst_type = SR_INST_USB;
sdi->conn = usb;
drvc->instances = g_slist_append(drvc->instances, sdi);
devices = g_slist_append(devices, sdi);
}
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return devices;
}
static GSList *dev_list(void)
{
return ((struct drv_context *)(di->priv))->instances;
}
static int dev_open(struct sr_dev_inst *sdi)
{
struct drv_context *drvc = di->priv;
struct sr_usb_dev_inst *usb;
struct dev_context *devc;
int ret;
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usb = sdi->conn;
devc = sdi->priv;
if ((ret = sr_usb_open(drvc->sr_ctx->libusb_ctx, usb)) == SR_OK)
sdi->status = SR_ST_ACTIVE;
/* Detach kernel drivers which grabbed this device (if any). */
if (libusb_kernel_driver_active(usb->devhdl, 0) == 1) {
ret = libusb_detach_kernel_driver(usb->devhdl, 0);
if (ret < 0) {
sr_err("Failed to detach kernel driver: %s.",
libusb_error_name(ret));
return SR_ERR;
}
devc->detached_kernel_driver = 1;
sr_dbg("Successfully detached kernel driver.");
} else {
sr_dbg("No need to detach a kernel driver.");
}
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/* Claim interface 0. */
if ((ret = libusb_claim_interface(usb->devhdl, 0)) < 0) {
sr_err("Failed to claim interface 0: %s.",
libusb_error_name(ret));
return SR_ERR;
}
sr_dbg("Successfully claimed interface 0.");
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return ret;
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}
static int dev_close(struct sr_dev_inst *sdi)
{
struct sr_usb_dev_inst *usb;
struct dev_context *devc;
int ret;
usb = sdi->conn;
devc = sdi->priv;
if ((ret = libusb_release_interface(usb->devhdl, 0)))
sr_err("Failed to release interface 0: %s.\n", libusb_error_name(ret));
else
sr_dbg("Successfully released interface 0.\n");
if (!ret && devc->detached_kernel_driver) {
if ((ret = libusb_attach_kernel_driver(usb->devhdl, 0))) {
sr_err("Failed to attach kernel driver: %s.\n",
libusb_error_name(ret));
} else {
devc->detached_kernel_driver = 0;
sr_dbg("Successfully attached kernel driver.\n");
}
}
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libusb_close(usb->devhdl);
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sdi->status = SR_ST_INACTIVE;
return ret;
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}
static int cleanup(void)
{
return std_dev_clear(di, NULL);
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}
static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_channel_group *cg)
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{
struct dev_context *devc = sdi->priv;
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(void)cg;
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switch (key) {
case SR_CONF_LIMIT_SAMPLES:
*data = g_variant_new_uint64(devc->limit_samples);
break;
case SR_CONF_LIMIT_MSEC:
*data = g_variant_new_uint64(devc->limit_msec);
break;
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default:
return SR_ERR_NA;
}
return SR_OK;
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}
static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
const struct sr_channel_group *cg)
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{
struct dev_context *devc;
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(void)cg;
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
if (!(devc = sdi->priv)) {
sr_err("sdi->priv was NULL.");
return SR_ERR_BUG;
}
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switch (key) {
case SR_CONF_LIMIT_SAMPLES:
devc->limit_samples = g_variant_get_uint64(data);
sr_dbg("Setting sample limit to %" PRIu64 ".", devc->limit_samples);
break;
case SR_CONF_LIMIT_MSEC:
devc->limit_msec = g_variant_get_uint64(data);
sr_dbg("Setting time limit to %" PRIu64 "ms.", devc->limit_msec);
break;
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default:
return SR_ERR_NA;
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}
return SR_OK;
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}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_channel_group *cg)
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{
(void)sdi;
(void)cg;
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switch (key) {
case SR_CONF_SCAN_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwopts, ARRAY_SIZE(hwopts), sizeof(int32_t));
break;
case SR_CONF_DEVICE_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
break;
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default:
return SR_ERR_NA;
}
return SR_OK;
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}
static int dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data)
{
struct dev_context *devc;
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
devc = sdi->priv;
devc->session_cb_data = cb_data;
devc->start_time = g_get_monotonic_time();
/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
sr_source_add(0, 0, 10, brymen_bm86x_receive_data, (void *)sdi);
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return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
struct sr_datafeed_packet packet;
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
/* Send end packet to the session bus. */
packet.type = SR_DF_END;
sr_session_send(cb_data, &packet);
sr_source_remove(0);
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return SR_OK;
}
SR_PRIV struct sr_dev_driver brymen_bm86x_driver_info = {
.name = "brymen-bm86x",
.longname = "Brymen BM86X",
.api_version = 1,
.init = init,
.cleanup = cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = NULL,
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.config_get = config_get,
.config_set = config_set,
.config_list = config_list,
.dev_open = dev_open,
.dev_close = dev_close,
.dev_acquisition_start = dev_acquisition_start,
.dev_acquisition_stop = dev_acquisition_stop,
.priv = NULL,
};