+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2012 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 <glib.h>
-#include <libusb.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "protocol.h"
-
-SR_PRIV struct sr_dev_inst *lascar_scan(int bus, int address);
-SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
-static struct sr_dev_driver *di = &lascar_el_usb_driver_info;
-static int hw_dev_close(struct sr_dev_inst *sdi);
-
-static const int hwopts[] = {
- SR_CONF_CONN,
- 0,
-};
-
-static const int hwcaps[] = {
- SR_CONF_THERMOMETER,
- SR_CONF_HYGROMETER,
- SR_CONF_LIMIT_SAMPLES,
- 0
-};
-
-/* Properly close and free all devices. */
-static int clear_instances(void)
-{
- struct sr_dev_inst *sdi;
- struct drv_context *drvc;
- struct dev_context *devc;
- GSList *l;
-
- if (!(drvc = di->priv))
- return SR_OK;
-
- for (l = drvc->instances; l; l = l->next) {
- if (!(sdi = l->data))
- continue;
- if (!(devc = sdi->priv))
- continue;
-
- hw_dev_close(sdi);
- sr_usb_dev_inst_free(devc->usb);
- sr_dev_inst_free(sdi);
- }
-
- g_slist_free(drvc->instances);
- drvc->instances = NULL;
-
- return SR_OK;
-}
-
-static int hw_init(struct sr_context *sr_ctx)
-{
- struct drv_context *drvc;
-
- if (!(drvc = g_try_malloc0(sizeof(struct drv_context)))) {
- sr_err("Driver context malloc failed.");
- return SR_ERR_MALLOC;
- }
-
- drvc->sr_ctx = sr_ctx;
- di->priv = drvc;
-
- return SR_OK;
-}
-
-static GSList *hw_scan(GSList *options)
-{
- struct drv_context *drvc;
- struct dev_context *devc;
- struct sr_dev_inst *sdi;
- struct sr_usb_dev_inst *usb;
- struct sr_config *src;
- GSList *usb_devices, *devices, *l;
- const char *conn;
-
- (void)options;
-
- if (!(drvc = di->priv)) {
- sr_err("Driver was not initialized.");
- return NULL;
- }
-
- /* USB scan is always authoritative. */
- clear_instances();
-
- conn = NULL;
- for (l = options; l; l = l->next) {
- src = l->data;
- switch (src->key) {
- case SR_CONF_CONN:
- conn = src->value;
- break;
- }
- }
- if (!conn)
- return NULL;
-
- devices = NULL;
- if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, 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) {
- usb = l->data;
- if (!(sdi = lascar_scan(usb->bus, usb->address))) {
- /* Not a Lascar EL-USB. */
- g_free(usb);
- continue;
- }
- devc = sdi->priv;
- devc->usb = usb;
- 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);
-
- return devices;
-}
-
-static GSList *hw_dev_list(void)
-{
- struct drv_context *drvc;
-
- if (!(drvc = di->priv)) {
- sr_err("Driver was not initialized.");
- return NULL;
- }
-
- return drvc->instances;
-}
-
-static int hw_dev_open(struct sr_dev_inst *sdi)
-{
- struct drv_context *drvc;
- struct dev_context *devc;
- int ret;
-
- if (!(drvc = di->priv)) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- devc = sdi->priv;
- if (sr_usb_open(drvc->sr_ctx->libusb_ctx, devc->usb) != SR_OK)
- return SR_ERR;
-
- if ((ret = libusb_claim_interface(devc->usb->devhdl, LASCAR_INTERFACE))) {
- sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
- return SR_ERR;
- }
- sdi->status = SR_ST_ACTIVE;
-
- return ret;
-}
-
-static int hw_dev_close(struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- devc = sdi->priv;
- if (!devc->usb->devhdl)
- /* Nothing to do. */
- return SR_OK;
-
- libusb_release_interface(devc->usb->devhdl, LASCAR_INTERFACE);
- libusb_close(devc->usb->devhdl);
- devc->usb->devhdl = NULL;
- g_free(devc->config);
- sdi->status = SR_ST_INACTIVE;
-
-
- return SR_OK;
-}
-
-static int hw_cleanup(void)
-{
- struct drv_context *drvc;
-
- if (!(drvc = di->priv))
- /* Can get called on an unused driver, doesn't matter. */
- return SR_OK;
-
- clear_instances();
- g_free(drvc);
- di->priv = NULL;
-
- return SR_OK;
-}
-
-static int config_get(int id, const void **data, const struct sr_dev_inst *sdi)
-{
- (void)sdi;
-
- switch (id) {
- case SR_DI_HWOPTS:
- *data = hwopts;
- break;
- case SR_DI_HWCAPS:
- *data = hwcaps;
- break;
- default:
- return SR_ERR_ARG;
- }
-
- return SR_OK;
-}
-
-static int config_set(int id, const void *value, const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- int ret;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
- if (sdi->status != SR_ST_ACTIVE) {
- sr_err("Device inactive, can't set config options.");
- return SR_ERR;
- }
-
- devc = sdi->priv;
- ret = SR_OK;
- switch (id) {
- case SR_CONF_LIMIT_SAMPLES:
- devc->limit_samples = *(const uint64_t *)value;
- sr_dbg("Setting sample limit to %" PRIu64 ".",
- devc->limit_samples);
- break;
- default:
- sr_err("Unknown hardware capability: %d.", id);
- ret = SR_ERR_ARG;
- }
-
- return ret;
-}
-
-static void mark_xfer(struct libusb_transfer *xfer)
-{
-
- if (xfer->status == LIBUSB_TRANSFER_COMPLETED)
- xfer->user_data = GINT_TO_POINTER(1);
- else
- xfer->user_data = GINT_TO_POINTER(-1);
-
-}
-
-/* The Lascar software, in its infinite ignorance, reads a set of four
- * bytes from the device config struct and interprets it as a float.
- * That only works because they only use windows, and only on x86. However
- * we may be running on any architecture, any operating system. So we have
- * to convert these four bytes as the Lascar software would on windows/x86,
- * to the local representation of a float.
- * The source format is little-endian, with IEEE 754-2008 BINARY32 encoding. */
-static float binary32_le_to_float(unsigned char *buf)
-{
- GFloatIEEE754 f;
-
- f.v_float = 0;
- f.mpn.sign = (buf[3] & 0x80) ? 1 : 0;
- f.mpn.biased_exponent = (buf[3] << 1) | (buf[2] >> 7);
- f.mpn.mantissa = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7f) << 16);
-
- return f.v_float;
-}
-
-static int lascar_proc_config(const struct sr_dev_inst *sdi)
-{
- struct dev_context *devc;
- int ret;
-
- devc = sdi->priv;
- if (!(devc->config = lascar_get_config(devc->usb->devhdl)))
- return SR_ERR;
-
- ret = SR_OK;
- switch (devc->profile->logformat) {
- case LOG_TEMP_RH:
- devc->sample_size = 2;
- devc->temp_unit = devc->config[0x2e] | (devc->config[0x2f] << 8);
- if (devc->temp_unit != 0 && devc->temp_unit != 1) {
- sr_dbg("invalid temperature unit %d", devc->temp_unit);
- /* Default to Celcius, we're all adults here. */
- devc->temp_unit = 0;
- } else
- sr_dbg("temperature unit is %s", devc->temp_unit
- ? "Fahrenheit" : "Celcius");
- break;
- case LOG_CO:
- devc->sample_size = 2;
- devc->co_high = binary32_le_to_float(devc->config + 0x24);
- devc->co_low = binary32_le_to_float(devc->config + 0x28);
- sr_dbg("EL-USB-CO calibration high %f low %f", devc->co_high,
- devc->co_low);
- break;
- default:
- ret = SR_ERR_ARG;
- }
- devc->logged_samples = devc->config[0x1e] | (devc->config[0x1f] << 8);
- sr_dbg("device log contains %d samples.", devc->logged_samples);
-
- return ret;
-}
-
-static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
- void *cb_data)
-{
- struct sr_datafeed_packet packet;
- struct sr_datafeed_header header;
- struct dev_context *devc;
- struct drv_context *drvc = di->priv;
- struct libusb_transfer *xfer_in, *xfer_out;
- const struct libusb_pollfd **pfd;
- struct timeval tv;
- int ret, i;
- unsigned char cmd[3], resp[4], *buf;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- devc = sdi->priv;
- devc->cb_data = cb_data;
-
- if (lascar_proc_config(sdi) != SR_OK)
- return SR_ERR;
-
- sr_dbg("Starting log retrieval.");
-
- /* Send header packet to the session bus. */
- sr_dbg("Sending SR_DF_HEADER.");
- packet.type = SR_DF_HEADER;
- packet.payload = (uint8_t *)&header;
- header.feed_version = 1;
- sr_session_send(devc->cb_data, &packet);
-
- if (devc->logged_samples == 0) {
- /* This ensures the frontend knows the session is done. */
- packet.type = SR_DF_END;
- sr_session_send(devc->cb_data, &packet);
- return SR_OK;
- }
-
- if (!(xfer_in = libusb_alloc_transfer(0)) ||
- !(xfer_out = libusb_alloc_transfer(0)))
- return SR_ERR;
-
- libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
- 0x00, 0xffff, 0x00, NULL, 0, 50);
- libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
- 0x02, 0x0002, 0x00, NULL, 0, 50);
- libusb_control_transfer(devc->usb->devhdl, LIBUSB_REQUEST_TYPE_VENDOR,
- 0x02, 0x0001, 0x00, NULL, 0, 50);
-
-
- /* Flush input. The F321 requires this. */
- while (libusb_bulk_transfer(devc->usb->devhdl, LASCAR_EP_IN, resp,
- 256, &ret, 5) == 0 && ret > 0)
- ;
-
- libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
- resp, sizeof(resp), mark_xfer, 0, 10000);
- if (libusb_submit_transfer(xfer_in) != 0) {
- libusb_free_transfer(xfer_in);
- libusb_free_transfer(xfer_out);
- return SR_ERR;
- }
-
- cmd[0] = 0x03;
- cmd[1] = 0xff;
- cmd[2] = 0xff;
- libusb_fill_bulk_transfer(xfer_out, devc->usb->devhdl, LASCAR_EP_OUT,
- cmd, 3, mark_xfer, 0, 100);
- if (libusb_submit_transfer(xfer_out) != 0) {
- libusb_free_transfer(xfer_in);
- libusb_free_transfer(xfer_out);
- return SR_ERR;
- }
-
- tv.tv_sec = 0;
- tv.tv_usec = 0;
- while (!xfer_in->user_data || !xfer_out->user_data) {
- g_usleep(5000);
- libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
- }
- if (xfer_in->user_data != GINT_TO_POINTER(1) ||
- xfer_in->user_data != GINT_TO_POINTER(1)) {
- sr_dbg("no response to log transfer request");
- libusb_free_transfer(xfer_in);
- libusb_free_transfer(xfer_out);
- return SR_ERR;
- }
- if (xfer_in->actual_length != 3 || xfer_in->buffer[0] != 2) {
- sr_dbg("invalid response to log transfer request");
- libusb_free_transfer(xfer_in);
- libusb_free_transfer(xfer_out);
- return SR_ERR;
- }
- devc->log_size = xfer_in->buffer[1] + (xfer_in->buffer[2] << 8);
- libusb_free_transfer(xfer_out);
-
- pfd = libusb_get_pollfds(drvc->sr_ctx->libusb_ctx);
- for (i = 0; pfd[i]; i++) {
- /* Handle USB events every 100ms, for decent latency. */
- sr_source_add(pfd[i]->fd, pfd[i]->events, 100,
- lascar_el_usb_handle_events, (void *)sdi);
- /* We'll need to remove this fd later. */
- devc->usbfd[i] = pfd[i]->fd;
- }
- devc->usbfd[i] = -1;
-
- buf = g_try_malloc(4096);
- libusb_fill_bulk_transfer(xfer_in, devc->usb->devhdl, LASCAR_EP_IN,
- buf, 4096, lascar_el_usb_receive_transfer, cb_data, 100);
- if ((ret = libusb_submit_transfer(xfer_in) != 0)) {
- sr_err("Unable to submit transfer: %s.", libusb_error_name(ret));
- libusb_free_transfer(xfer_in);
- g_free(buf);
- return SR_ERR;
- }
-
- return SR_OK;
-}
-
-SR_PRIV int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
-{
- (void)cb_data;
-
- if (!di->priv) {
- sr_err("Driver was not initialized.");
- return SR_ERR;
- }
-
- if (sdi->status != SR_ST_ACTIVE) {
- sr_err("Device inactive, can't stop acquisition.");
- return SR_ERR;
- }
-
- sdi->status = SR_ST_STOPPING;
- /* TODO: free ongoing transfers? */
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info = {
- .name = "lascar-el-usb",
- .longname = "Lascar EL-USB",
- .api_version = 1,
- .init = hw_init,
- .cleanup = hw_cleanup,
- .scan = hw_scan,
- .dev_list = hw_dev_list,
- .dev_clear = clear_instances,
- .config_get = config_get,
- .config_set = config_set,
- .dev_open = hw_dev_open,
- .dev_close = hw_dev_close,
- .dev_acquisition_start = hw_dev_acquisition_start,
- .dev_acquisition_stop = hw_dev_acquisition_stop,
- .priv = NULL,
-};
projects / libsigrok.git / blobdiff