--- /dev/null
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2011-2014 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "protocol.h"
+
+SR_PRIV struct sr_dev_driver chronovu_la_driver_info;
+static struct sr_dev_driver *di = &chronovu_la_driver_info;
+
+static const int32_t hwcaps[] = {
+ SR_CONF_LOGIC_ANALYZER,
+ SR_CONF_SAMPLERATE,
+ SR_CONF_LIMIT_MSEC, /* TODO: Not yet implemented. */
+ SR_CONF_LIMIT_SAMPLES, /* TODO: Not yet implemented. */
+};
+
+/* The ChronoVu LA8/LA16 can have multiple VID/PID pairs. */
+static struct {
+ uint16_t vid;
+ uint16_t pid;
+ int model;
+ const char *iproduct;
+} vid_pid[] = {
+ { 0x0403, 0x6001, CHRONOVU_LA8, "ChronoVu LA8" },
+ { 0x0403, 0x8867, CHRONOVU_LA8, "ChronoVu LA8" },
+ { 0x0403, 0x6001, CHRONOVU_LA16, "ChronoVu LA16" },
+ { 0x0403, 0x8867, CHRONOVU_LA16, "ChronoVu LA16" },
+};
+
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data);
+
+static void clear_helper(void *priv)
+{
+ struct dev_context *devc;
+
+ devc = priv;
+
+ ftdi_free(devc->ftdic);
+ g_free(devc->final_buf);
+}
+
+static int dev_clear(void)
+{
+ return std_dev_clear(di, clear_helper);
+}
+
+static int init(struct sr_context *sr_ctx)
+{
+ return std_init(sr_ctx, di, LOG_PREFIX);
+}
+
+static int add_device(int idx, int model, GSList **devices)
+{
+ int ret;
+ unsigned int i;
+ struct sr_dev_inst *sdi;
+ struct drv_context *drvc;
+ struct dev_context *devc;
+ struct sr_channel *ch;
+
+ ret = SR_OK;
+
+ drvc = di->priv;
+
+ /* Allocate memory for our private device context. */
+ devc = g_try_malloc(sizeof(struct dev_context));
+
+ /* Set some sane defaults. */
+ devc->prof = &cv_profiles[model];
+ devc->ftdic = NULL; /* Will be set in the open() API call. */
+ devc->cur_samplerate = 0; /* Set later (different for LA8/LA16). */
+ devc->limit_msec = 0;
+ devc->limit_samples = 0;
+ devc->cb_data = NULL;
+ memset(devc->mangled_buf, 0, BS);
+ devc->final_buf = NULL;
+ devc->trigger_pattern = 0x0000; /* Irrelevant, see trigger_mask. */
+ devc->trigger_mask = 0x0000; /* All channels: "don't care". */
+ devc->trigger_edgemask = 0x0000; /* All channels: "state triggered". */
+ devc->trigger_found = 0;
+ devc->done = 0;
+ devc->block_counter = 0;
+ devc->divcount = 0;
+ devc->usb_vid = vid_pid[idx].vid;
+ devc->usb_pid = vid_pid[idx].pid;
+ memset(devc->samplerates, 0, sizeof(uint64_t) * 255);
+
+ /* Allocate memory where we'll store the de-mangled data. */
+ if (!(devc->final_buf = g_try_malloc(SDRAM_SIZE))) {
+ sr_err("Failed to allocate memory for sample buffer.");
+ ret = SR_ERR_MALLOC;
+ goto err_free_devc;
+ }
+
+ /* We now know the device, set its max. samplerate as default. */
+ devc->cur_samplerate = devc->prof->max_samplerate;
+
+ /* Register the device with libsigrok. */
+ sdi = sr_dev_inst_new(0, SR_ST_INITIALIZING,
+ "ChronoVu", devc->prof->modelname, NULL);
+ if (!sdi) {
+ sr_err("Failed to create device instance.");
+ ret = SR_ERR;
+ goto err_free_final_buf;
+ }
+ sdi->driver = di;
+ sdi->priv = devc;
+
+ for (i = 0; i < devc->prof->num_channels; i++) {
+ if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE,
+ cv_channel_names[i]))) {
+ ret = SR_ERR;
+ goto err_free_dev_inst;
+ }
+ sdi->channels = g_slist_append(sdi->channels, ch);
+ }
+
+ *devices = g_slist_append(*devices, sdi);
+ drvc->instances = g_slist_append(drvc->instances, sdi);
+
+ return SR_OK;
+
+err_free_dev_inst:
+ sr_dev_inst_free(sdi);
+err_free_final_buf:
+ g_free(devc->final_buf);
+err_free_devc:
+ g_free(devc);
+
+ return ret;
+}
+
+static GSList *scan(GSList *options)
+{
+ int ret;
+ unsigned int i;
+ GSList *devices;
+ struct ftdi_context *ftdic;
+
+ (void)options;
+
+ devices = NULL;
+
+ /* Allocate memory for the FTDI context and initialize it. */
+ if (!(ftdic = ftdi_new())) {
+ sr_err("Failed to initialize libftdi.");
+ return NULL;
+ }
+
+ /* Check for LA8 and/or LA16 devices with various VID/PIDs. */
+ for (i = 0; i < ARRAY_SIZE(vid_pid); i++) {
+ ret = ftdi_usb_open_desc(ftdic, vid_pid[i].vid,
+ vid_pid[i].pid, vid_pid[i].iproduct, NULL);
+ if (ret < 0)
+ continue; /* No device found. */
+
+ sr_dbg("Found %s device (%04x:%04x).",
+ vid_pid[i].iproduct, vid_pid[i].vid, vid_pid[i].pid);
+
+ if ((ret = add_device(i, vid_pid[i].model, &devices)) < 0)
+ sr_dbg("Failed to add device: %d.", ret);
+
+ if ((ret = ftdi_usb_close(ftdic)) < 0)
+ sr_dbg("Failed to close FTDI device (%d): %s.",
+ ret, ftdi_get_error_string(ftdic));
+ }
+
+ /* Close USB device, deinitialize and free the FTDI context. */
+ ftdi_free(ftdic);
+ ftdic = NULL;
+
+ return devices;
+}
+
+static GSList *dev_list(void)
+{
+ return ((struct drv_context *)(di->priv))->instances;
+}
+
+static int dev_open(struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ int ret;
+
+ ret = SR_ERR;
+
+ if (!(devc = sdi->priv))
+ return SR_ERR_BUG;
+
+ /* Allocate memory for the FTDI context and initialize it. */
+ if (!(devc->ftdic = ftdi_new())) {
+ sr_err("Failed to initialize libftdi.");
+ return SR_ERR;
+ }
+
+ sr_dbg("Opening %s device (%04x:%04x).", devc->prof->modelname,
+ devc->usb_vid, devc->usb_pid);
+
+ /* Open the device. */
+ if ((ret = ftdi_usb_open_desc(devc->ftdic, devc->usb_vid,
+ devc->usb_pid, devc->prof->iproduct, NULL)) < 0) {
+ sr_err("Failed to open FTDI device (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_ftdi_free;
+ }
+ sr_dbg("Device opened successfully.");
+
+ /* Purge RX/TX buffers in the FTDI chip. */
+ if ((ret = ftdi_usb_purge_buffers(devc->ftdic)) < 0) {
+ sr_err("Failed to purge FTDI buffers (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_ftdi_free;
+ }
+ sr_dbg("FTDI buffers purged successfully.");
+
+ /* Enable flow control in the FTDI chip. */
+ if ((ret = ftdi_setflowctrl(devc->ftdic, SIO_RTS_CTS_HS)) < 0) {
+ sr_err("Failed to enable FTDI flow control (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ goto err_ftdi_free;
+ }
+ sr_dbg("FTDI flow control enabled successfully.");
+
+ /* Wait 100ms. */
+ g_usleep(100 * 1000);
+
+ sdi->status = SR_ST_ACTIVE;
+
+ return SR_OK;
+
+err_ftdi_free:
+ ftdi_free(devc->ftdic); /* Close device (if open), free FTDI context. */
+ devc->ftdic = NULL;
+ return ret;
+}
+
+static int dev_close(struct sr_dev_inst *sdi)
+{
+ int ret;
+ struct dev_context *devc;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_OK;
+
+ devc = sdi->priv;
+
+ if (devc->ftdic && (ret = ftdi_usb_close(devc->ftdic)) < 0)
+ sr_err("Failed to close FTDI device (%d): %s.",
+ ret, ftdi_get_error_string(devc->ftdic));
+ sdi->status = SR_ST_INACTIVE;
+
+ return SR_OK;
+}
+
+static int cleanup(void)
+{
+ return dev_clear();
+}
+
+static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ struct dev_context *devc;
+
+ (void)cg;
+
+ switch (id) {
+ case SR_CONF_SAMPLERATE:
+ if (!sdi || !(devc = sdi->priv))
+ return SR_ERR_BUG;
+ *data = g_variant_new_uint64(devc->cur_samplerate);
+ break;
+ default:
+ return SR_ERR_NA;
+ }
+
+ return SR_OK;
+}
+
+static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ struct dev_context *devc;
+
+ (void)cg;
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR_DEV_CLOSED;
+
+ if (!(devc = sdi->priv))
+ return SR_ERR_BUG;
+
+ switch (id) {
+ case SR_CONF_SAMPLERATE:
+ if (cv_set_samplerate(sdi, g_variant_get_uint64(data)) < 0)
+ return SR_ERR;
+ break;
+ case SR_CONF_LIMIT_MSEC:
+ if (g_variant_get_uint64(data) == 0)
+ return SR_ERR_ARG;
+ devc->limit_msec = g_variant_get_uint64(data);
+ break;
+ case SR_CONF_LIMIT_SAMPLES:
+ if (g_variant_get_uint64(data) == 0)
+ return SR_ERR_ARG;
+ devc->limit_samples = g_variant_get_uint64(data);
+ break;
+ default:
+ return SR_ERR_NA;
+ }
+
+ return SR_OK;
+}
+
+static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg)
+{
+ GVariant *gvar, *grange[2];
+ GVariantBuilder gvb;
+ struct dev_context *devc;
+
+ (void)cg;
+
+ switch (key) {
+ 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_SAMPLERATE:
+ if (!sdi || !sdi->priv || !(devc = sdi->priv))
+ return SR_ERR_BUG;
+ cv_fill_samplerates_if_needed(sdi);
+ g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
+ gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
+ devc->samplerates,
+ ARRAY_SIZE(devc->samplerates),
+ sizeof(uint64_t));
+ g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
+ *data = g_variant_builder_end(&gvb);
+ break;
+ case SR_CONF_LIMIT_SAMPLES:
+ grange[0] = g_variant_new_uint64(0);
+ grange[1] = g_variant_new_uint64(MAX_NUM_SAMPLES);
+ *data = g_variant_new_tuple(grange, 2);
+ break;
+ case SR_CONF_TRIGGER_TYPE:
+ if (!sdi || !sdi->priv || !(devc = sdi->priv) || !devc->prof)
+ return SR_ERR_BUG;
+ *data = g_variant_new_string(devc->prof->trigger_type);
+ break;
+ default:
+ return SR_ERR_NA;
+ }
+
+ return SR_OK;
+}
+
+static int receive_data(int fd, int revents, void *cb_data)
+{
+ int i, ret;
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+
+ (void)fd;
+ (void)revents;
+
+ if (!(sdi = cb_data)) {
+ sr_err("cb_data was NULL.");
+ return FALSE;
+ }
+
+ if (!(devc = sdi->priv)) {
+ sr_err("sdi->priv was NULL.");
+ return FALSE;
+ }
+
+ if (!devc->ftdic) {
+ sr_err("devc->ftdic was NULL.");
+ return FALSE;
+ }
+
+ /* Get one block of data. */
+ if ((ret = cv_read_block(devc)) < 0) {
+ sr_err("Failed to read data block: %d.", ret);
+ dev_acquisition_stop(sdi, sdi);
+ return FALSE;
+ }
+
+ /* We need to get exactly NUM_BLOCKS blocks (i.e. 8MB) of data. */
+ if (devc->block_counter != (NUM_BLOCKS - 1)) {
+ devc->block_counter++;
+ return TRUE;
+ }
+
+ sr_dbg("Sampling finished, sending data to session bus now.");
+
+ /* All data was received and demangled, send it to the session bus. */
+ for (i = 0; i < NUM_BLOCKS; i++)
+ cv_send_block_to_session_bus(devc, i);
+
+ dev_acquisition_stop(sdi, sdi);
+
+ return TRUE;
+}
+
+static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
+{
+ struct dev_context *devc;
+ uint8_t buf[8];
+ int bytes_to_write, bytes_written;
+
+ 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;
+ }
+
+ if (!devc->ftdic) {
+ sr_err("devc->ftdic was NULL.");
+ return SR_ERR_BUG;
+ }
+
+ devc->divcount = cv_samplerate_to_divcount(sdi, devc->cur_samplerate);
+ if (devc->divcount == 0xff) {
+ sr_err("Invalid divcount/samplerate.");
+ return SR_ERR;
+ }
+
+ if (cv_configure_channels(sdi) != SR_OK) {
+ sr_err("Failed to configure channels.");
+ return SR_ERR;
+ }
+
+ /* Fill acquisition parameters into buf[]. */
+ if (devc->prof->model == CHRONOVU_LA8) {
+ buf[0] = devc->divcount;
+ buf[1] = 0xff; /* This byte must always be 0xff. */
+ buf[2] = devc->trigger_pattern & 0xff;
+ buf[3] = devc->trigger_mask & 0xff;
+ bytes_to_write = 4;
+ } else {
+ buf[0] = devc->divcount;
+ buf[1] = 0xff; /* This byte must always be 0xff. */
+ buf[2] = (devc->trigger_pattern & 0xff00) >> 8; /* LSB */
+ buf[3] = (devc->trigger_pattern & 0x00ff) >> 0; /* MSB */
+ buf[4] = (devc->trigger_mask & 0xff00) >> 8; /* LSB */
+ buf[5] = (devc->trigger_mask & 0x00ff) >> 0; /* MSB */
+ buf[6] = (devc->trigger_edgemask & 0xff00) >> 8; /* LSB */
+ buf[7] = (devc->trigger_edgemask & 0x00ff) >> 0; /* MSB */
+ bytes_to_write = 8;
+ }
+
+ /* Start acquisition. */
+ bytes_written = cv_write(devc, buf, bytes_to_write);
+
+ if (bytes_written < 0 || bytes_written != bytes_to_write) {
+ sr_err("Acquisition failed to start.");
+ return SR_ERR;
+ }
+
+ sr_dbg("Hardware acquisition started successfully.");
+
+ devc->cb_data = cb_data;
+
+ /* Send header packet to the session bus. */
+ std_session_send_df_header(cb_data, LOG_PREFIX);
+
+ /* Time when we should be done (for detecting trigger timeouts). */
+ devc->done = (devc->divcount + 1) * devc->prof->trigger_constant +
+ g_get_monotonic_time() + (10 * G_TIME_SPAN_SECOND);
+ devc->block_counter = 0;
+ devc->trigger_found = 0;
+
+ /* Hook up a dummy handler to receive data from the device. */
+ sr_source_add(-1, G_IO_IN, 0, receive_data, (void *)sdi);
+
+ return SR_OK;
+}
+
+static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
+{
+ struct sr_datafeed_packet packet;
+
+ (void)sdi;
+
+ sr_dbg("Stopping acquisition.");
+ sr_source_remove(-1);
+
+ /* Send end packet to the session bus. */
+ sr_dbg("Sending SR_DF_END.");
+ packet.type = SR_DF_END;
+ sr_session_send(cb_data, &packet);
+
+ return SR_OK;
+}
+
+SR_PRIV struct sr_dev_driver chronovu_la_driver_info = {
+ .name = "chronovu-la",
+ .longname = "ChronoVu LA8/LA16",
+ .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,
+};
projects / libsigrok.git / blobdiff