libsigrok/hardware/uni-t-ut32x/api.c

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/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
*
* 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"
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#include <string.h>
static const int32_t hwcaps[] = {
SR_CONF_THERMOMETER,
SR_CONF_LIMIT_SAMPLES,
SR_CONF_CONTINUOUS,
SR_CONF_DATA_SOURCE,
};
static char *probes[] = {
"T1",
"T2",
"T1-T2",
};
static const char *data_sources[] = {
"Live",
"Memory",
};
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SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info;
static struct sr_dev_driver *di = &uni_t_ut32x_driver_info;
static int init(struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
static GSList *scan(GSList *options)
{
struct drv_context *drvc;
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struct dev_context *devc;
struct sr_dev_inst *sdi;
struct sr_probe *probe;
struct sr_config *src;
GSList *usb_devices, *devices, *l;
int i;
const char *conn;
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drvc = di->priv;
drvc->instances = NULL;
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conn = NULL;
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;
}
}
if (!conn)
return NULL;
devices = NULL;
if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
/* We have a list of sr_usb_dev_inst matching the connection
* string. Wrap them in sr_dev_inst and we're done. */
for (l = usb_devices; l; l = l->next) {
if (!(sdi = sr_dev_inst_new(0, SR_ST_INACTIVE, VENDOR,
MODEL, NULL)))
return NULL;
sdi->driver = di;
sdi->inst_type = SR_INST_USB;
sdi->conn = l->data;
for (i = 0; i < 3; i++) {
if (!(probe = sr_probe_new(i, SR_PROBE_ANALOG, TRUE,
probes[i]))) {
sr_dbg("Probe malloc failed.");
return NULL;
}
sdi->probes = g_slist_append(sdi->probes, probe);
}
if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
sr_dbg("Device context malloc failed.");
return NULL;
}
sdi->priv = devc;
devc->limit_samples = 0;
devc->data_source = DEFAULT_DATA_SOURCE;
drvc->instances = g_slist_append(drvc->instances, sdi);
devices = g_slist_append(devices, sdi);
}
g_slist_free(usb_devices);
} else
g_slist_free_full(usb_devices, g_free);
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return devices;
}
static GSList *dev_list(void)
{
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return ((struct drv_context *)(di->priv))->instances;
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}
static int dev_clear(void)
{
return std_dev_clear(di, NULL);
}
static int dev_open(struct sr_dev_inst *sdi)
{
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struct drv_context *drvc;
struct sr_usb_dev_inst *usb;
int ret;
if (!(drvc = di->priv)) {
sr_err("Driver was not initialized.");
return SR_ERR;
}
usb = sdi->conn;
if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
return SR_ERR;
/*
* The libusbx 1.0.9 darwin backend is broken: it can report a kernel
* driver being active, but detaching it always returns an error.
*/
#if !defined(__APPLE__)
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if (libusb_kernel_driver_active(usb->devhdl, USB_INTERFACE) == 1) {
if ((ret = libusb_detach_kernel_driver(usb->devhdl, USB_INTERFACE)) < 0) {
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sr_err("failed to detach kernel driver: %s",
libusb_error_name(ret));
return SR_ERR;
}
}
#endif
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if ((ret = libusb_set_configuration(usb->devhdl, USB_CONFIGURATION))) {
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sr_err("Failed to set configuration: %s.", libusb_error_name(ret));
return SR_ERR;
}
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if ((ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE))) {
sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
return SR_ERR;
}
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sdi->status = SR_ST_ACTIVE;
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return ret;
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}
static int dev_close(struct sr_dev_inst *sdi)
{
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struct sr_usb_dev_inst *usb;
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if (!di->priv) {
sr_err("Driver was not initialized.");
return SR_ERR;
}
usb = sdi->conn;
if (!usb->devhdl)
/* Nothing to do. */
return SR_OK;
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libusb_release_interface(usb->devhdl, USB_INTERFACE);
libusb_close(usb->devhdl);
usb->devhdl = NULL;
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sdi->status = SR_ST_INACTIVE;
return SR_OK;
}
static int cleanup(void)
{
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int ret;
struct drv_context *drvc;
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if (!(drvc = di->priv))
/* Can get called on an unused driver, doesn't matter. */
return SR_OK;
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ret = dev_clear();
g_free(drvc);
di->priv = NULL;
return ret;
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}
static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_probe_group *probe_group)
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{
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struct dev_context *devc;
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(void)probe_group;
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devc = sdi->priv;
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switch (key) {
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case SR_CONF_LIMIT_SAMPLES:
*data = g_variant_new_uint64(devc->limit_samples);
break;
case SR_CONF_DATA_SOURCE:
if (devc->data_source == DATA_SOURCE_LIVE)
*data = g_variant_new_string("Live");
else
*data = g_variant_new_string("Memory");
break;
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default:
return SR_ERR_NA;
}
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return SR_OK;
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}
static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi,
const struct sr_probe_group *probe_group)
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{
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struct dev_context *devc;
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int ret;
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const char *tmp_str;
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(void)probe_group;
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
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if (!di->priv) {
sr_err("Driver was not initialized.");
return SR_ERR;
}
devc = sdi->priv;
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ret = SR_OK;
switch (key) {
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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_DATA_SOURCE:
tmp_str = g_variant_get_string(data, NULL);
if (!strcmp(tmp_str, "Live"))
devc->data_source = DATA_SOURCE_LIVE;
else if (!strcmp(tmp_str, "Memory"))
devc->data_source = DATA_SOURCE_MEMORY;
else
return SR_ERR;
break;
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default:
ret = SR_ERR_NA;
}
return ret;
}
static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
const struct sr_probe_group *probe_group)
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{
(void)sdi;
(void)probe_group;
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switch (key) {
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case SR_CONF_DEVICE_OPTIONS:
*data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
break;
case SR_CONF_DATA_SOURCE:
*data = g_variant_new_strv(data_sources, ARRAY_SIZE(data_sources));
break;
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default:
return SR_ERR_NA;
}
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return SR_OK;
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}
static int dev_acquisition_start(const struct sr_dev_inst *sdi,
void *cb_data)
{
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struct drv_context *drvc;
struct dev_context *devc;
struct sr_usb_dev_inst *usb;
const struct libusb_pollfd **pfd;
int len, ret, i;
unsigned char cmd[2];
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if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
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drvc = di->priv;
devc = sdi->priv;
usb = sdi->conn;
devc->cb_data = cb_data;
devc->num_samples = 0;
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devc->packet_len = 0;
/* Configure serial port parameters on USB-UART interface
* chip inside the device (just baudrate 2400 actually). */
cmd[0] = 0x09;
cmd[1] = 0x60;
ret = libusb_control_transfer(usb->devhdl, 0x21, 0x09, 0x0300, 0x00,
cmd, 2, 5);
if (ret != 2) {
sr_dbg("Failed to configure CH9325: %s", libusb_error_name(ret));
return SR_ERR;
}
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/* Send header packet to the session bus. */
std_session_send_df_header(cb_data, LOG_PREFIX);
if (!(devc->xfer = libusb_alloc_transfer(0)))
return SR_ERR;
/* Length of payload to follow. */
cmd[0] = 0x01;
if (devc->data_source == DATA_SOURCE_LIVE)
cmd[1] = CMD_GET_LIVE;
else
cmd[1] = CMD_GET_STORED;
ret = libusb_bulk_transfer(usb->devhdl, EP_OUT, cmd, 2, &len, 5);
if (ret != 0 || len != 2) {
sr_dbg("Failed to start acquisition: %s", libusb_error_name(ret));
libusb_free_transfer(devc->xfer);
return SR_ERR;
}
libusb_fill_bulk_transfer(devc->xfer, usb->devhdl, EP_IN, devc->buf,
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8, uni_t_ut32x_receive_transfer, (void *)sdi, 15);
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if (libusb_submit_transfer(devc->xfer) != 0) {
libusb_free_transfer(devc->xfer);
return SR_ERR;
}
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pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
for (i = 0; pfd[i]; i++) {
/* Handle USB events every 10ms. */
sr_source_add(pfd[i]->fd, pfd[i]->events, 10,
uni_t_ut32x_handle_events, (void *)sdi);
/* We'll need to remove this fd later. */
devc->usbfd[i] = pfd[i]->fd;
}
devc->usbfd[i] = -1;
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return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
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(void)cb_data;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
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/* Signal USB transfer handler to clean up and stop. */
sdi->status = SR_ST_STOPPING;
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return SR_OK;
}
SR_PRIV struct sr_dev_driver uni_t_ut32x_driver_info = {
.name = "uni-t-ut32x",
.longname = "UNI-T UT32x",
.api_version = 1,
.init = init,
.cleanup = cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = dev_clear,
.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,
};