static GSList *dev_insts = NULL;
static libusb_context *usb_context = NULL;
+static int hw_dev_acquisition_stop(int dev_index, gpointer session_dev_id);
+
/**
* Check the USB configuration to determine if this is an fx2lafw device.
*
return SR_OK;
}
+static void close_dev(struct sr_dev_inst *sdi)
+{
+ struct fx2lafw_device *ctx;
+
+ ctx = sdi->priv;
+
+ if (ctx->usb->devhdl == NULL)
+ return;
+
+ sr_info("fx2lafw: closing device %d on %d.%d interface %d", sdi->index,
+ ctx->usb->bus, ctx->usb->address, USB_INTERFACE);
+ libusb_release_interface(ctx->usb->devhdl, USB_INTERFACE);
+ libusb_close(ctx->usb->devhdl);
+ ctx->usb->devhdl = NULL;
+ sdi->status = SR_ST_INACTIVE;
+}
+
static struct fx2lafw_device* fx2lafw_device_new(void)
{
struct fx2lafw_device *fx2lafw;
ctx = fx2lafw_device_new();
ctx->profile = fx2lafw_prof;
sdi->priv = ctx;
- device_instances = g_slist_append(dev_insts, sdi);
+ dev_insts = g_slist_append(dev_insts, sdi);
if (check_conf_profile(devlist[i])) {
/* Already has the firmware, so fix the new address. */
return SR_OK;
}
-static int hw_dev_close(int device_index)
+static int hw_dev_close(int dev_index)
{
- (void)device_index;
+ struct sr_dev_inst *sdi;
+
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index))) {
+ sr_err("fx2lafw: %s: sdi was NULL", __func__);
+ return SR_ERR; /* TODO: SR_ERR_ARG? */
+ }
+
+ /* TODO */
+ close_dev(sdi);
+
return SR_OK;
}
{
GSList *l;
struct sr_dev_inst *sdi;
+ struct fx2lafw_device *ctx;
+ int ret = SR_OK;
- for(l = device_instances; l; l = l->next) {
+ for(l = dev_insts; l; l = l->next) {
+ if (!(sdi = l->data)) {
+ /* Log error, but continue cleaning up the rest. */
+ sr_err("fx2lafw: %s: sdi was NULL, continuing", __func__);
+ ret = SR_ERR_BUG;
+ continue;
+ }
+ if (!(ctx = sdi->priv)) {
+ /* Log error, but continue cleaning up the rest. */
+ sr_err("fx2lafw: %s: sdi->priv was NULL, continuing",
+ __func__);
+ ret = SR_ERR_BUG;
+ continue;
+ }
+ close_dev(sdi);
sdi = l->data;
sr_dev_inst_free(sdi);
}
- g_slist_free(device_instances);
- device_instances = NULL;
+ g_slist_free(dev_insts);
+ dev_insts = NULL;
if(usb_context)
libusb_exit(usb_context);
usb_context = NULL;
- return SR_OK;
+ return ret;
}
static void *hw_dev_info_get(int device_index, int device_info_id)
return fx2lafw_capabilities;
}
-static int hw_dev_config_set(int dev_index, int capability, void *value)
+static int hw_dev_config_set(int dev_index, int hwcap, void *value)
{
- (void)dev_index;
- (void)capability;
- (void)value;
- return SR_OK;
+ struct sr_dev_inst *sdi;
+ struct fx2lafw_device *ctx;
+ int ret;
+
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
+ return SR_ERR;
+ ctx = sdi->priv;
+
+ if (hwcap == SR_HWCAP_LIMIT_SAMPLES) {
+ ctx->limit_samples = *(uint64_t *)value;
+ ret = SR_OK;
+ } else {
+ ret = SR_ERR;
+ }
+
+ return ret;
+}
+
+static int receive_data(int fd, int revents, void *user_data)
+{
+ struct timeval tv;
+
+ /* Avoid compiler warnings. */
+ (void)fd;
+ (void)revents;
+ (void)user_data;
+
+ tv.tv_sec = tv.tv_usec = 0;
+ libusb_handle_events_timeout(usb_context, &tv);
+
+ return TRUE;
+}
+
+static void receive_transfer(struct libusb_transfer *transfer)
+{
+ /* TODO: These statics have to move to the ctx struct. */
+ static int num_samples = 0;
+ static int empty_transfer_count = 0;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_logic logic;
+ struct fx2lafw_device *ctx;
+ int cur_buflen;
+ unsigned char *cur_buf, *new_buf;
+
+ /* hw_dev_acquisition_stop() is telling us to stop. */
+ if (transfer == NULL)
+ num_samples = -1;
+
+ /*
+ * If acquisition has already ended, just free any queued up
+ * transfer that come in.
+ */
+ if (num_samples == -1) {
+ if (transfer)
+ libusb_free_transfer(transfer);
+ return;
+ }
+
+ sr_info("fx2lafw: receive_transfer(): status %d received %d bytes",
+ transfer->status, transfer->actual_length);
+
+ /* Save incoming transfer before reusing the transfer struct. */
+ cur_buf = transfer->buffer;
+ cur_buflen = transfer->actual_length;
+ ctx = transfer->user_data;
+
+ /* Fire off a new request. */
+ if (!(new_buf = g_try_malloc(4096))) {
+ sr_err("fx2lafw: %s: new_buf malloc failed", __func__);
+ return; /* TODO: SR_ERR_MALLOC */
+ }
+
+ transfer->buffer = new_buf;
+ transfer->length = 4096;
+ if (libusb_submit_transfer(transfer) != 0) {
+ /* TODO: Stop session? */
+ /* TODO: Better error message. */
+ sr_err("fx2lafw: %s: libusb_submit_transfer error", __func__);
+ }
+
+ if (cur_buflen == 0) {
+ empty_transfer_count++;
+ if (empty_transfer_count > MAX_EMPTY_TRANSFERS) {
+ /*
+ * The FX2 gave up. End the acquisition, the frontend
+ * will work out that the samplecount is short.
+ */
+ hw_dev_acquisition_stop(-1, ctx->session_data);
+ }
+ return;
+ } else {
+ empty_transfer_count = 0;
+ }
+
+ /* Send the incoming transfer to the session bus. */
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ logic.length = cur_buflen;
+ logic.unitsize = 1;
+ logic.data = cur_buf;
+ sr_session_bus(ctx->session_data, &packet);
+ g_free(cur_buf);
+
+ num_samples += cur_buflen;
+ if (ctx->limit_samples &&
+ (unsigned int) num_samples > ctx->limit_samples) {
+ hw_dev_acquisition_stop(-1, ctx->session_data);
+ }
}
static int hw_dev_acquisition_start(int dev_index, gpointer session_data)
{
- (void)dev_index;
- (void)session_data;
+ struct sr_dev_inst *sdi;
+ struct sr_datafeed_packet *packet;
+ struct sr_datafeed_header *header;
+ struct fx2lafw_device *ctx;
+ struct libusb_transfer *transfer;
+ const struct libusb_pollfd **lupfd;
+ int size, i;
+ unsigned char *buf;
+
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
+ return SR_ERR;
+ ctx = sdi->priv;
+ ctx->session_data = session_data;
+
+ if (!(packet = g_try_malloc(sizeof(struct sr_datafeed_packet)))) {
+ sr_err("fx2lafw: %s: packet malloc failed", __func__);
+ return SR_ERR_MALLOC;
+ }
+
+ if (!(header = g_try_malloc(sizeof(struct sr_datafeed_header)))) {
+ sr_err("fx2lafw: %s: header malloc failed", __func__);
+ return SR_ERR_MALLOC;
+ }
+
+ /* Start with 2K transfer, subsequently increased to 4K. */
+ size = 2048;
+ for (i = 0; i < NUM_SIMUL_TRANSFERS; i++) {
+ if (!(buf = g_try_malloc(size))) {
+ sr_err("fx2lafw: %s: buf malloc failed", __func__);
+ return SR_ERR_MALLOC;
+ }
+ transfer = libusb_alloc_transfer(0);
+ libusb_fill_bulk_transfer(transfer, ctx->usb->devhdl,
+ 2 | LIBUSB_ENDPOINT_IN, buf, size,
+ receive_transfer, ctx, 40);
+ if (libusb_submit_transfer(transfer) != 0) {
+ /* TODO: Free them all. */
+ libusb_free_transfer(transfer);
+ g_free(buf);
+ return SR_ERR;
+ }
+ size = 4096;
+ }
+
+ lupfd = libusb_get_pollfds(usb_context);
+ for (i = 0; lupfd[i]; i++)
+ sr_source_add(lupfd[i]->fd, lupfd[i]->events,
+ 40, receive_data, NULL);
+ free(lupfd); /* NOT g_free()! */
+
+ packet->type = SR_DF_HEADER;
+ packet->payload = header;
+ header->feed_version = 1;
+ gettimeofday(&header->starttime, NULL);
+ header->samplerate = 24000000UL;
+ header->num_logic_probes = ctx->profile->num_probes;
+ sr_session_bus(session_data, packet);
+ g_free(header);
+ g_free(packet);
+
return SR_OK;
}
/* This stops acquisition on ALL devices, ignoring device_index. */
static int hw_dev_acquisition_stop(int dev_index, gpointer session_data)
{
+ struct sr_datafeed_packet packet;
+
+ /* Avoid compiler warnings. */
(void)dev_index;
- (void)session_data;
+
+ packet.type = SR_DF_END;
+ sr_session_bus(session_data, &packet);
+
+ receive_transfer(NULL);
+
+ /* TODO: Need to cancel and free any queued up transfers. */
+
return SR_OK;
}
projects / libsigrok.git / blobdiff