1 files changed, 331 insertions, 0 deletions
diff --git a/host/ausb/ausb.c b/host/ausb/ausb.c
new file mode 100644
index 0000000..8b0117f
--- /dev/null
+++ b/host/ausb/ausb.c
@@ -0,0 +1,331 @@
+/* Wrapper/Extension code to libusb-0.1 to support asynchronous requests
+ * on Linux platforns 
+ *
+ * (C) 2004-2005 by Harald Welte <laforge@gnumonks.org>
+ *
+ * Distributed and licensed under the terms of GNU LGPL, Version 2.1
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/utsname.h>
+#include <sys/ioctl.h>
+
+#include "ausb.h"
+#include "usb.h"
+
+#ifdef DEBUG_AUSB
+#define DEBUGP(x, args...)	fprintf(stderr, "%s:%s():%u " x, __FILE__, \
+					__FUNCTION__, __LINE__, ## args)
+#else
+#define DEBUGP(x, args...);
+#endif
+
+#define SIGAUSB		(SIGRTMIN+1)
+
+static int ausb_get_fd(ausb_dev_handle *ah)
+{
+	return *((int *)ah->uh);
+}
+
+
+static int kernel_2_5;
+
+/* FIXME: this has to go */
+static struct ausb_dev_handle *last_handle = NULL;
+
+static int is_kernel_2_5()
+{
+	struct utsname uts;
+	int ret;
+
+	uname(&uts);
+
+	ret = (strncmp(uts.release, "2.5.", 4) == 0) ||
+	       (strncmp(uts.release, "2.6.", 4) == 0);
+
+	return ret;
+}
+
+void ausb_dump_urb(struct usbdevfs_urb *uurb)
+{
+	DEBUGP("urb(%p): type=%u, endpoint=0x%x, status=%d, flags=0x%x, number_of_packets=%d, error_count=%d\n", uurb, uurb->type, uurb->endpoint, uurb->status, uurb->flags, uurb->number_of_packets, uurb->error_count);
+}
+
+void ausb_fill_int_urb(struct usbdevfs_urb *uurb, unsigned char endpoint,
+		      void *buffer, int buffer_length)
+				    
+{
+	uurb->type = kernel_2_5 ? USBDEVFS_URB_TYPE_INTERRUPT : USBDEVFS_URB_TYPE_BULK;
+	uurb->endpoint = endpoint; /* | USB_DIR_IN; */
+	uurb->flags = kernel_2_5 ? 0 : 1 ; /* USBDEVFS_URB_QUEUE_BULK; */
+	uurb->buffer = buffer;
+	uurb->buffer_length = buffer_length;
+	uurb->signr = SIGAUSB;
+	uurb->start_frame = -1;
+}
+
+int ausb_submit_urb(ausb_dev_handle *ah, struct usbdevfs_urb *uurb)
+{
+	int ret;
+
+	DEBUGP("ah=%p\n", ah);
+	ausb_dump_urb(uurb);
+
+	/* save ausb_dev_handle in opaque usercontext field */
+	uurb->usercontext = ah;
+
+	do {
+		ret = ioctl(ausb_get_fd(ah), USBDEVFS_SUBMITURB, uurb);
+	} while (ret < 0 && errno == EINTR);
+
+	return ret;
+}
+
+int ausb_discard_urb(ausb_dev_handle *ah, struct usbdevfs_urb *uurb)
+{
+	int ret;
+
+	DEBUGP("ah=%p, uurb=%p\n");
+	ausb_dump_urb(uurb);
+
+	do {
+		ret = ioctl(ausb_get_fd(ah), USBDEVFS_DISCARDURB, uurb);
+	} while (ret < 0 && errno == EINTR);
+
+	return ret;
+}
+
+struct usbdevfs_urb *ausb_get_urb(ausb_dev_handle *ah)
+{
+	int ret;
+	struct usbdevfs_urb *uurb;
+
+	DEBUGP("entering\n");
+
+	do {
+		ret = ioctl(ausb_get_fd(ah), USBDEVFS_REAPURBNDELAY, &uurb);
+	} while (ret < 0 && errno == EINTR);
+
+	if (ret < 0 && errno == EAGAIN) {
+		DEBUGP("ioctl returned %d (errno=%s)\n", ret,
+			strerror(errno));
+		return NULL;
+	}
+
+	DEBUGP("returning %p\n", uurb);
+	return uurb;
+}
+
+static void handle_urb(struct usbdevfs_urb *uurb)
+{
+	struct ausb_dev_handle *ah = uurb->usercontext;
+
+	DEBUGP("called, ah=%p\n", ah);
+
+	if (uurb->type >= AUSB_USBDEVFS_URB_TYPES) {
+		DEBUGP("unknown uurb type %u\n", uurb->type);
+		return;
+	}
+
+	if (!ah) {
+		DEBUGP("cant't call handler because missing ah ptr\n");
+		return;
+	}
+
+	if (!ah->cb[uurb->type].handler) {
+		DEBUGP("received URB type %u, but no handler\n", uurb->type);
+		return;
+	}
+	ah->cb[uurb->type].handler(uurb, ah->cb[uurb->type].userdata);
+}
+
+static void sigact_rtmin(int sig, siginfo_t *siginfo, void *v)
+{
+	int count;
+	struct usbdevfs_urb *urb;
+
+	if (sig != SIGAUSB)
+		return;
+ 
+	//DEBUGP("errno=%d, si_addr=%p\n", siginfo->errno, siginfo->si_addr);
+
+	DEBUGP("last_handle=%p\n", last_handle);
+
+	if (!last_handle)
+		return;
+
+	for (count = 0; ; count++) {
+		urb = ausb_get_urb(last_handle);
+
+		if (urb == NULL) {
+			DEBUGP("ausb_get_urb() returned urb==NULL\n");
+			break;
+		}
+
+		DEBUGP("calling handle_urb(%p)\n", urb);
+		handle_urb(urb);
+	}
+}
+
+
+int ausb_init(void)
+{
+	struct sigaction act;
+
+	DEBUGP("entering\n");
+
+	memset(&act, 0, sizeof(act));
+	act.sa_sigaction = sigact_rtmin;
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = SA_SIGINFO;
+
+	sigaction(SIGAUSB, &act, NULL);
+
+	kernel_2_5 = is_kernel_2_5();
+
+	DEBUGP("kernel 2.5+ = %d\n", kernel_2_5);
+
+	usb_init();
+	usb_find_busses();
+	usb_find_devices();
+	return 1;
+}
+
+ausb_dev_handle *ausb_open(struct usb_device *dev)
+{
+	ausb_dev_handle *dh = malloc(sizeof *dh);
+
+	DEBUGP("entering, dh=%p\n", dh);
+
+	memset(dh, 0, sizeof(*dh));
+
+	dh->uh = usb_open(dev);
+
+	if (!dh->uh) {
+		DEBUGP("usb_open() failed\n");
+		free(dh);
+		return NULL;
+	}
+
+	last_handle = dh;
+	DEBUGP("last_handle = %p\n", last_handle);
+
+	return dh;
+}
+
+int ausb_register_callback(ausb_dev_handle *ah, unsigned char type,
+			   void (*callback)(struct usbdevfs_urb *uurb,
+					    void *userdata),
+			   void *userdata)
+{
+	DEBUGP("registering callback for type %u:%p\n", type, callback);
+
+	if (type >= AUSB_USBDEVFS_URB_TYPES) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (!kernel_2_5 && type == USBDEVFS_URB_TYPE_INTERRUPT)
+		type = USBDEVFS_URB_TYPE_BULK;
+
+	ah->cb[type].handler = callback;
+	ah->cb[type].userdata = userdata;
+
+	return 0;
+}
+
+int ausb_claim_interface(ausb_dev_handle *ah, int interface)
+{
+	DEBUGP("entering\n");
+	return usb_claim_interface(ah->uh, interface);
+}
+
+int ausb_release_interface(ausb_dev_handle *ah, int interface)
+{
+	DEBUGP("entering\n");
+	/* what the hell? */
+	if (ah == last_handle)
+		last_handle = NULL;
+	return usb_release_interface(ah->uh, interface);
+}
+
+int ausb_set_configuration(ausb_dev_handle *ah, int configuration)
+{
+	DEBUGP("entering\n");
+	return usb_set_configuration(ah->uh, configuration);
+}
+
+int ausb_bulk_write(ausb_dev_handle *ah, int ep, char *bytes, int size, int timeout)
+{
+	DEBUGP("entering (ah=%p, ep=0x%x, bytes=%p, size=%d, timeout=%d\n",
+		ah, ep, bytes, size, timeout);
+	return __usb_bulk_write(ah->uh, ep, bytes, size, timeout);
+}
+
+int ausb_bulk_read(ausb_dev_handle *ah, int ep, char *bytes, int size, int timeout)
+{
+	DEBUGP("entering (ah=%p, ep=0x%x, bytes=%p, size=%d, timeout=%d\n",
+		ah, ep, bytes, size, timeout);
+	return __usb_bulk_read(ah->uh, ep, bytes, size, timeout);
+}
+
+int ausb_clear_halt(ausb_dev_handle *ah, unsigned int ep)
+{
+	DEBUGP("entering (ah=%p, ep=0x%x)\n", ah, ep);
+	return usb_clear_halt(ah->uh, ep);
+}
+
+int ausb_reset(ausb_dev_handle *ah)
+{
+	DEBUGP("entering (ah=%p)\n", ah);
+	return usb_reset(ah->uh);
+}
+
+int ausb_resetep(ausb_dev_handle *ah, int ep)
+{
+	DEBUGP("entering (ah=%pm ep=0x%x)\n", ah, ep);
+	return usb_resetep(ah->uh, ep);
+}
+
+#ifdef LIBUSB_HAS_GET_DRIVER_NP
+int ausb_get_driver_np(ausb_dev_handle *ah, int interface, char *name,
+		       unsigned int namelen)
+{
+	DEBUGP("entering\n");
+	return usb_get_driver_np(ah->uh, interface, name, namelen);
+}
+#endif
+
+#ifdef LIBUSB_HAS_DETACH_KERNEL_DRIVER_NP
+int ausb_detach_kernel_driver_np(ausb_dev_handle *ah, int interface)
+{
+	DEBUGP("entering\n");
+	return usb_detach_kernel_driver_np(ah->uh, interface);
+}
+int ausb_reattach_kernel_driver_np(ausb_dev_handle *ah, int interface)
+{
+	DEBUGP("entering\n");
+	return __usb_reattach_kernel_driver_np(ah->uh, interface);
+}
+#endif
+
+int ausb_close(struct ausb_dev_handle *ah)
+{
+	DEBUGP("entering\n");
+
+	if (ah == last_handle)
+		last_handle = NULL;
+
+	return usb_close(ah->uh);
+}
+
+void ausb_fini(void)
+{
+	DEBUGP("entering\n");
+	sigaction(SIGAUSB, NULL, NULL);
+}