Add USB transport to the bccmd utility

1 files changed, 173 insertions, 0 deletions

diff --git a/tools/csr_usb.c b/tools/csr_usb.c
new file mode 100644
index 00000000..2c29251f
--- /dev/null
+++ b/tools/csr_usb.c
@@ -0,0 +1,173 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2004-2005  Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <usb.h>
+
+#include "csr.h"
+
+#ifdef NEED_USB_GET_BUSSES
+static inline struct usb_bus *usb_get_busses(void)
+{
+	return usb_busses;
+}
+#endif
+
+#ifndef USB_DIR_OUT
+#define USB_DIR_OUT	0x00
+#endif
+
+static uint16_t seqnum = 0x0000;
+
+static struct usb_dev_handle *udev = NULL;
+
+int csr_open_usb(char *device)
+{
+	struct usb_bus *bus;
+	struct usb_device *dev;
+
+	usb_init();
+
+	usb_find_busses();
+	usb_find_devices();
+
+	for (bus = usb_get_busses(); bus; bus = bus->next) {
+		for (dev = bus->devices; dev; dev = dev->next) {
+			if (dev->descriptor.bDeviceClass == USB_CLASS_HUB)
+				continue;
+
+			if (dev->descriptor.idVendor != 0x0a12 ||
+					dev->descriptor.idProduct != 0x0001)
+				continue;
+
+			goto found;
+		}
+	}
+
+	fprintf(stderr, "Device not available\n");
+
+	return -1;
+
+found:
+	udev = usb_open(dev);
+	if (!udev) {
+		fprintf(stderr, "Can't open device: %s (%d)\n",
+						strerror(errno), errno);
+		return -1;
+	}
+
+	if (usb_claim_interface(udev, 0) < 0) {
+		fprintf(stderr, "Can't claim interface: %s (%d)\n",
+						strerror(errno), errno);
+		usb_close(udev);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int do_command(uint16_t command, uint16_t seqnum, uint16_t varid, uint8_t *value, uint16_t length)
+{
+	unsigned char cp[254], rp[254];
+	uint8_t cmd[10];
+	uint16_t size;
+	int len, offset = 0;
+
+	size = (length < 8) ? 9 : ((length + 1) / 2) + 5;
+
+	cmd[0] = command & 0xff;
+	cmd[1] = command >> 8;
+	cmd[2] = size & 0xff;
+	cmd[3] = size >> 8;
+	cmd[4] = seqnum & 0xff;
+	cmd[5] = seqnum >> 8;
+	cmd[6] = varid & 0xff;
+	cmd[7] = varid >> 8;
+	cmd[8] = 0x00;
+	cmd[9] = 0x00;
+
+	memset(cp, 0, sizeof(cp));
+	cp[0] = 0x00;
+	cp[1] = 0xfc;
+	cp[2] = (size * 2) + 1;
+	cp[3] = 0xc2;
+	memcpy(cp + 4, cmd, sizeof(cmd));
+	memcpy(cp + 14, value, length);
+
+	usb_interrupt_read(udev, 0x81, (void *) rp, sizeof(rp), 2);
+
+	if (usb_control_msg(udev, USB_TYPE_CLASS | USB_DIR_OUT | USB_RECIP_DEVICE,
+				0, 0, 0, (void *) cp, (size * 2) + 4, 1000) < 0)
+		return -1;
+
+	switch (varid) {
+	case CSR_VARID_COLD_RESET:
+	case CSR_VARID_WARM_RESET:
+	case CSR_VARID_COLD_HALT:
+	case CSR_VARID_WARM_HALT:
+		return 0;
+	}
+
+	do {
+		len = usb_interrupt_read(udev, 0x81,
+				(void *) (rp + offset), sizeof(rp), 10);
+		offset += len;
+	} while (len > 0);
+
+	if (rp[0] != 0xff || rp[2] != 0xc2) {
+		errno = EIO;
+		return -1;
+	}
+
+	if ((rp[11] + (rp[12] << 8)) != 0) {
+		errno = ENXIO;
+		return -1;
+	}
+
+	memcpy(value, rp + 13, length);
+
+	return 0;
+}
+
+int csr_read_usb(uint16_t varid, uint8_t *value, uint16_t length)
+{
+	return do_command(0x0000, seqnum++, varid, value, length);
+}
+
+int csr_write_usb(uint16_t varid, uint8_t *value, uint16_t length)
+{
+	return do_command(0x0002, seqnum++, varid, value, length);
+}
+
+void csr_close_usb(void)
+{
+	usb_release_interface(udev, 0);
+	usb_close(udev);
+}