initial commit

linux/libstrm/Makefile

@@ -0,0 +1,13 @@
+CC = gcc
+CFLAGS=-Wall -Werror -O2 -I. -c -fPIC
+
+SRCS = usb2strm.c
+OBJS = $(SRCS:%.c=%.o)
+
+libstrm: ${OBJS}
+	${CC} -shared -Wl,-soname,$@.so.1 -o $@.so.1.0.1 $^ -lusb
+	@if [ ! -e $@.so ]; then ln -s $@.so.1.0.1 $@.so; fi
+	@if [ ! -e $@.so.1 ]; then ln -s $@.so.1.0.1 $@.so.1; fi
+
+clean:
+	rm -f *.o *.so.* *.so

linux/libstrm/strm.h

@@ -0,0 +1,17 @@
+#ifndef _STRM_H
+#define _STRM_H
+
+#include <stdint.h>
+#include <usb.h>
+
+#define STRM_TYPE_DDR2 0x1
+#define STRM_DDR2_WRITE_HDR_INIT(addr) \
+	(uint32_t)(0x80000000 | (addr & 0x0fffffff))
+#define STRM_DDR2_READ_HDR_INIT(addr) \
+	(uint32_t)(~(0x1 << 31) & (addr & 0x0fffffff))
+
+/* prototypes */
+usb_dev_handle *strm_init(int vendor, int product);
+int strm_fini(void);
+
+#endif /* _STRM_H */

linux/libstrm/usb2strm.c

@@ -0,0 +1,77 @@
+/*********************************************
+ * (2013) Benjamin Krill <benjamin@krll.de>
+ *********************************************/
+#include <stdlib.h>
+#include <stdio.h>
+#include <usb.h>
+#include <string.h>
+#include <endian.h>
+#include <strm.h>
+
+#define DEBUG 0
+
+#if defined(DEBUG) && DEBUG == 1
+	#define printf_dbg(fmt, args...) printf(fmt, ## args)
+#else
+	#define printf_dbg(args...)
+#endif
+
+static usb_dev_handle *hd = NULL;
+
+/* TODO: extend to support multiple USB device on one host! */
+static struct usb_device *
+find_device(struct usb_bus* busses, int vendor, int product)
+{
+	struct usb_bus *bus;
+	struct usb_device *dev;
+
+	for (bus = busses; bus; bus = bus->next) {
+		printf_dbg("scanning bus %s\n", bus->dirname);
+
+		for (dev = bus->devices; dev; dev=dev->next) {
+			/* compare device vendor and product */
+			if ((dev->descriptor.idVendor == vendor) &&
+			    (dev->descriptor.idProduct == product))	{
+				/* print device information */
+				printf_dbg("\tfound device %s bus %s (idVendor 0x%04x idProduct 0x%04x)\n",
+				            dev->filename, dev->bus->dirname, dev->descriptor.idVendor,
+				            dev->descriptor.idProduct);
+				return dev;
+			} else {
+				printf_dbg("\tdevice %s does not match\n", dev->filename);
+			}
+		}
+	}
+	return NULL;
+}
+
+usb_dev_handle *
+strm_init(int vendor, int product)
+{
+	struct usb_device *dev;
+
+	usb_init();
+	usb_find_busses();
+	usb_find_devices();
+	if ((dev = find_device(usb_get_busses(), vendor, product)) == NULL)
+		return NULL;
+
+	if (!(hd = usb_open(dev))) {
+		printf("FAILED: cannot open device.\n");
+		return NULL;
+	}
+	/* reset usb device */
+	usb_reset(hd);
+	printf_dbg("Lets do the magic (%p) ...\n", hd);
+
+	return hd;
+}
+
+int
+strm_fini(void)
+{
+	if (hd)
+		usb_close(hd);
+	hd = NULL;
+	return 0;
+}