#include <stdio.h>
#include <stdlib.h>
+#include <stdbool.h>
#include <inttypes.h>
#include <glib.h>
#include <libusb.h>
static GSList *dev_insts = NULL;
static libusb_context *usb_context = NULL;
+/**
+ * Check the USB configuration to determine if this is an fx2lafw device.
+ *
+ * @return true if the device's configuration profile match fx2lafw
+ * configuration, flase otherwise.
+ */
+static bool check_conf_profile(libusb_device *dev)
+{
+ struct libusb_device_descriptor des;
+ struct libusb_config_descriptor *conf_dsc = NULL;
+ const struct libusb_interface_descriptor *intf_dsc;
+ bool ret = false;
+
+ while (!ret) {
+ /* Assume it's not a Saleae Logic unless proven wrong. */
+ ret = 0;
+
+ if (libusb_get_device_descriptor(dev, &des) != 0)
+ break;
+
+ if (des.bNumConfigurations != 1)
+ /* Need exactly 1 configuration. */
+ break;
+
+ if (libusb_get_config_descriptor(dev, 0, &conf_dsc) != 0)
+ break;
+
+ if (conf_dsc->bNumInterfaces != 1)
+ /* Need exactly 1 interface. */
+ break;
+
+ if (conf_dsc->interface[0].num_altsetting != 1)
+ /* Need just one alternate setting. */
+ break;
+
+ intf_dsc = &(conf_dsc->interface[0].altsetting[0]);
+ if (intf_dsc->bNumEndpoints != 3)
+ /* Need exactly 3 end points. */
+ break;
+
+ if ((intf_dsc->endpoint[0].bEndpointAddress & 0x8f) !=
+ (1 | LIBUSB_ENDPOINT_OUT))
+ /* The first endpoint should be 1 (outbound). */
+ break;
+
+ if ((intf_dsc->endpoint[1].bEndpointAddress & 0x8f) !=
+ (2 | LIBUSB_ENDPOINT_IN))
+ /* The second endpoint should be 2 (inbound). */
+ break;
+
+ /* TODO: Check the debug channel... */
+
+ /* If we made it here, it must be an fx2lafw. */
+ ret = true;
+ }
+
+ if (conf_dsc)
+ libusb_free_config_descriptor(conf_dsc);
+
+ return ret;
+}
+
+static int fx2lafw_open_dev(int dev_index)
+{
+ libusb_device **devlist;
+ struct libusb_device_descriptor des;
+ struct sr_dev_inst *sdi;
+ struct fx2lafw_device *ctx;
+ int err, skip, i;
+
+ if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
+ return SR_ERR;
+ ctx = sdi->priv;
+
+ if (sdi->status == SR_ST_ACTIVE)
+ /* already in use */
+ return SR_ERR;
+
+ skip = 0;
+ libusb_get_device_list(usb_context, &devlist);
+ for (i = 0; devlist[i]; i++) {
+ if ((err = libusb_get_device_descriptor(devlist[i], &des))) {
+ sr_err("fx2lafw: failed to get device descriptor: %d", err);
+ continue;
+ }
+
+ if (des.idVendor != FIRMWARE_VID
+ || des.idProduct != FIRMWARE_PID)
+ continue;
+
+ if (sdi->status == SR_ST_INITIALIZING) {
+ if (skip != dev_index) {
+ /* Skip devices of this type that aren't the one we want. */
+ skip += 1;
+ continue;
+ }
+ } else if (sdi->status == SR_ST_INACTIVE) {
+ /*
+ * This device is fully enumerated, so we need to find
+ * this device by vendor, product, bus and address.
+ */
+ if (libusb_get_bus_number(devlist[i]) != ctx->usb->bus
+ || libusb_get_device_address(devlist[i]) != ctx->usb->address)
+ /* this is not the one */
+ continue;
+ }
+
+ if (!(err = libusb_open(devlist[i], &ctx->usb->devhdl))) {
+ if (ctx->usb->address == 0xff)
+ /*
+ * first time we touch this device after firmware upload,
+ * so we don't know the address yet.
+ */
+ ctx->usb->address = libusb_get_device_address(devlist[i]);
+
+ sdi->status = SR_ST_ACTIVE;
+ sr_info("fx2lafw: opened device %d on %d.%d interface %d",
+ sdi->index, ctx->usb->bus,
+ ctx->usb->address, USB_INTERFACE);
+ } else {
+ sr_err("fx2lafw: failed to open device: %d", err);
+ }
+
+ /* if we made it here, we handled the device one way or another */
+ break;
+ }
+ libusb_free_device_list(devlist, 1);
+
+ if (sdi->status != SR_ST_ACTIVE)
+ return SR_ERR;
+
+ 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;
sdi->priv = ctx;
device_instances = g_slist_append(dev_insts, sdi);
+ if (check_conf_profile(devlist[i])) {
+ /* Already has the firmware, so fix the new address. */
+ sr_dbg("fx2lafw: Found a fx2lafw device.");
+ sdi->status = SR_ST_INACTIVE;
+ ctx->usb = sr_usb_dev_inst_new
+ (libusb_get_bus_number(devlist[i]),
+ libusb_get_device_address(devlist[i]), NULL);
+ } else {
+ if (ezusb_upload_firmware(devlist[i], USB_CONFIGURATION, FIRMWARE) == SR_OK)
+ /* Remember when the firmware on this device was updated */
+ g_get_current_time(&ctx->fw_updated);
+ else
+ sr_err("fx2lafw: firmware upload failed for "
+ "device %d", devcnt);
+ ctx->usb = sr_usb_dev_inst_new
+ (libusb_get_bus_number(devlist[i]), 0xff, NULL);
+ }
+
devcnt++;
}
libusb_free_device_list(devlist, 1);
static int hw_dev_open(int device_index)
{
- (void)device_index;
+ GTimeVal cur_time;
+ struct sr_dev_inst *sdi;
+ struct fx2lafw_device *ctx;
+ int timediff, err;
+
+ if (!(sdi = sr_dev_inst_get(dev_insts, device_index)))
+ return SR_ERR;
+ ctx = sdi->priv;
+
+ /*
+ * if the firmware was recently uploaded, wait up to MAX_RENUM_DELAY ms
+ * for the FX2 to renumerate
+ */
+ err = 0;
+ if (GTV_TO_MSEC(ctx->fw_updated) > 0) {
+ sr_info("fx2lafw: waiting for device to reset");
+ /* takes at least 300ms for the FX2 to be gone from the USB bus */
+ g_usleep(300 * 1000);
+ timediff = 0;
+ while (timediff < MAX_RENUM_DELAY) {
+ if ((err = fx2lafw_open_dev(device_index)) == SR_OK)
+ break;
+ g_usleep(100 * 1000);
+ g_get_current_time(&cur_time);
+ timediff = GTV_TO_MSEC(cur_time) - GTV_TO_MSEC(ctx->fw_updated);
+ }
+ sr_info("fx2lafw: device came back after %d ms", timediff);
+ } else {
+ err = fx2lafw_open_dev(device_index);
+ }
+
+ if (err != SR_OK) {
+ sr_err("fx2lafw: unable to open device");
+ return SR_ERR;
+ }
+ ctx = sdi->priv;
+
+ err = libusb_claim_interface(ctx->usb->devhdl, USB_INTERFACE);
+ if (err != 0) {
+ sr_err("fx2lafw: Unable to claim interface: %d", err);
+ return SR_ERR;
+ }
+
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;
}
static void *hw_dev_info_get(int device_index, int device_info_id)
{
struct sr_dev_inst *sdi;
- struct fx2lafw_device *fx2lafw_dev;
+ struct fx2lafw_device *ctx;
if (!(sdi = sr_dev_inst_get(dev_insts, device_index)))
return NULL;
- fx2lafw_dev = sdi->priv;
+ ctx = sdi->priv;
switch (device_info_id) {
case SR_DI_INST:
return sdi;
case SR_DI_NUM_PROBES:
- return GINT_TO_POINTER(fx2lafw_dev->profile->num_probes);
+ return GINT_TO_POINTER(ctx->profile->num_probes);
case SR_DI_PROBE_NAMES:
return fx2lafw_probe_names;
case SR_DI_SAMPLERATES:
projects / libsigrok.git / blobdiff