fx2lafw: Added probing for fx2lafw devices

hardware/fx2lafw/fx2lafw.c

@@ -19,12 +19,34 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <glib.h>
+#include <libusb.h>
 
 #include "config.h"
 #include "sigrok.h"
 #include "sigrok-internal.h"
 #include "fx2lafw.h"
 
+static struct fx2lafw_profile supported_fx2[] = {
+	/* USBee AX */
+	{ 0x08a9, 0x0014, "CWAV", "USBee AX", NULL, 8 },
+	{ 0, 0, 0, 0, 0, 0 }
+};
+
+static GSList *device_instances = NULL;
+static libusb_context *usb_context = NULL;
+
+static struct fx2lafw_device* fx2lafw_device_new(void)
+{
+	struct fx2lafw_device *fx2lafw;
+
+	if (!(fx2lafw = g_try_malloc0(sizeof(struct fx2lafw_device)))) {
+		sr_err("fx2lafw: %s: fx2lafw_device malloc failed", __func__);
+		return NULL;
+	}
+
+	return fx2lafw;
+}
 
 /*
  * API callbacks
@@ -32,8 +54,61 @@
 
 static int hw_init(const char *deviceinfo)
 {
+	struct sr_dev_inst *sdi;
+	struct libusb_device_descriptor des;
+	struct fx2lafw_profile *fx2lafw_prof;
+	struct fx2lafw_device *fx2lafw_dev;
+	libusb_device **devlist;
+	int err;
+	int devcnt = 0;
+	int i, j;
+
+	/* Avoid compiler warnings. */
 	(void)deviceinfo;
-	return 0;
+
+	if (libusb_init(&usb_context) != 0) {
+		sr_warn("Failed to initialize USB.");
+		return 0;
+	}
+
+	/* Find all fx2lafw compatible devices and upload firware to all of them. */
+	libusb_get_device_list(usb_context, &devlist);
+	for (i = 0; devlist[i]; i++) {
+
+		if ((err = libusb_get_device_descriptor(
+			devlist[i], &des)) != 0) {
+			sr_warn("failed to get device descriptor: %d", err);
+			continue;
+		}
+
+		fx2lafw_prof = NULL;
+		for (j = 0; supported_fx2[j].vid; j++) {
+			if (des.idVendor == supported_fx2[j].vid &&
+				des.idProduct == supported_fx2[j].pid) {
+				fx2lafw_prof = &supported_fx2[j];
+			}
+		}
+
+		/* Skip if the device was not found */
+		if(!fx2lafw_prof)
+			continue;
+
+		sdi = sr_dev_inst_new(devcnt, SR_ST_INITIALIZING,
+			fx2lafw_prof->vendor, fx2lafw_prof->model,
+			fx2lafw_prof->model_version);
+		if(!sdi)
+			return 0;
+
+		fx2lafw_dev = fx2lafw_device_new();
+		fx2lafw_dev->profile = fx2lafw_prof;
+		sdi->priv = fx2lafw_dev;
+		device_instances = g_slist_append(device_instances, sdi);
+
+		devcnt++;
+	}
+	libusb_free_device_list(devlist, 1);
+
+	return devcnt;
 }
 
 static int hw_dev_open(int device_index)
@@ -50,6 +125,21 @@ static int hw_dev_close(int device_index)
 
 static int hw_cleanup(void)
 {
+	GSList *l;
+	struct sr_dev_inst *sdi;
+
+	for(l = device_instances; l; l = l->next) {
+		sdi = l->data;
+		sr_dev_inst_free(sdi);
+	}
+
+	g_slist_free(device_instances);
+	device_instances = NULL;
+
+	if(usb_context)
+		libusb_exit(usb_context);
+	usb_context = NULL;
+
 	return SR_OK;
 }
 

hardware/fx2lafw/fx2lafw.h

@@ -20,4 +20,23 @@
 #ifndef LIBSIGROK_HARDWARE_FX2LAFW
 #define LIBSIGROK_HARDWARE_FX2LAFW
 
+struct fx2lafw_profile {
+	uint16_t vid;
+	uint16_t pid;
+
+	char *vendor;
+	char *model;
+	char *model_version;
+
+	int num_probes;
+};
+
+struct fx2lafw_device {
+	struct fx2lafw_profile *profile;
+
+	void *session_data;
+
+	struct sr_usb_device_instance *usb;
+};
+
 #endif