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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2010 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
#ifdef NEED_USB_INTERRUPT_READ
static inline int usb_interrupt_read(usb_dev_handle *dev, int ep, char *bytes, int size, int timeout)
{
return usb_bulk_read(dev, ep, bytes, size, timeout);
}
#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) - offset, 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);
}
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