tequilaOS/platform_system_core
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
platform_system_core/fastboot/usb_linux.c
mgross c840653efd fastboot: set the language local string 
Set the language local string to 0x409 (English US / en-us) such that
fastboot will successfully read the usb descriptor serial number string.
The usbdevfs ioctl fails when the wIndex is not initialized with the
local for the unicode of the usb descriptor string.  usbdevfs is an
obsolete interface and fastboot probably needs a re-write to use libusb
like what is in adb.

Change-Id: I3687f84643f53c736f14b3ae7793185d9b5cccc0
Signed-off-by: Mark D Horn <mark.d.horn@intel.com>
2012-01-23 13:12:23 -08:00

394 lines
10 KiB
C
Raw Blame History

/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include <errno.h>
#include <pthread.h>
#include <ctype.h>
#include <linux/usbdevice_fs.h>
#include <linux/usbdevice_fs.h>
#include <linux/version.h>
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
#include <linux/usb/ch9.h>
#else
#include <linux/usb_ch9.h>
#endif
#include <asm/byteorder.h>
#include "usb.h"
#define MAX_RETRIES 5
#ifdef TRACE_USB
#define DBG1(x...) fprintf(stderr, x)
#define DBG(x...) fprintf(stderr, x)
#else
#define DBG(x...)
#define DBG1(x...)
#endif
/* The max bulk size for linux is 16384 which is defined
* in drivers/usb/core/devio.c.
*/
#define MAX_USBFS_BULK_SIZE (16 * 1024)
struct usb_handle
{
char fname[64];
int desc;
unsigned char ep_in;
unsigned char ep_out;
};
static inline int badname(const char *name)
{
while(*name) {
if(!isdigit(*name++)) return 1;
}
return 0;
}
static int check(void *_desc, int len, unsigned type, int size)
{
unsigned char *desc = _desc;
if(len < size) return -1;
if(desc[0] < size) return -1;
if(desc[0] > len) return -1;
if(desc[1] != type) return -1;
return 0;
}
static int filter_usb_device(int fd, char *ptr, int len, int writable,
ifc_match_func callback,
int *ept_in_id, int *ept_out_id, int *ifc_id)
{
struct usb_device_descriptor *dev;
struct usb_config_descriptor *cfg;
struct usb_interface_descriptor *ifc;
struct usb_endpoint_descriptor *ept;
struct usb_ifc_info info;
int in, out;
unsigned i;
unsigned e;
if(check(ptr, len, USB_DT_DEVICE, USB_DT_DEVICE_SIZE))
return -1;
dev = (void*) ptr;
len -= dev->bLength;
ptr += dev->bLength;
if(check(ptr, len, USB_DT_CONFIG, USB_DT_CONFIG_SIZE))
return -1;
cfg = (void*) ptr;
len -= cfg->bLength;
ptr += cfg->bLength;
info.dev_vendor = dev->idVendor;
info.dev_product = dev->idProduct;
info.dev_class = dev->bDeviceClass;
info.dev_subclass = dev->bDeviceSubClass;
info.dev_protocol = dev->bDeviceProtocol;
info.writable = writable;
// read device serial number (if there is one)
info.serial_number[0] = 0;
if (dev->iSerialNumber) {
struct usbdevfs_ctrltransfer ctrl;
__u16 buffer[128];
int result;
memset(buffer, 0, sizeof(buffer));
ctrl.bRequestType = USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE;
ctrl.bRequest = USB_REQ_GET_DESCRIPTOR;
ctrl.wValue = (USB_DT_STRING << 8) | dev->iSerialNumber;
//language ID (en-us) for serial number string
ctrl.wIndex = 0x0409;
ctrl.wLength = sizeof(buffer);
ctrl.data = buffer;
ctrl.timeout = 50;
result = ioctl(fd, USBDEVFS_CONTROL, &ctrl);
if (result > 0) {
int i;
// skip first word, and copy the rest to the serial string, changing shorts to bytes.
result /= 2;
for (i = 1; i < result; i++)
info.serial_number[i - 1] = buffer[i];
info.serial_number[i - 1] = 0;
}
}
for(i = 0; i < cfg->bNumInterfaces; i++) {
if(check(ptr, len, USB_DT_INTERFACE, USB_DT_INTERFACE_SIZE))
return -1;
ifc = (void*) ptr;
len -= ifc->bLength;
ptr += ifc->bLength;
in = -1;
out = -1;
info.ifc_class = ifc->bInterfaceClass;
info.ifc_subclass = ifc->bInterfaceSubClass;
info.ifc_protocol = ifc->bInterfaceProtocol;
for(e = 0; e < ifc->bNumEndpoints; e++) {
if(check(ptr, len, USB_DT_ENDPOINT, USB_DT_ENDPOINT_SIZE))
return -1;
ept = (void*) ptr;
len -= ept->bLength;
ptr += ept->bLength;
if((ept->bmAttributes & 0x03) != 0x02)
continue;
if(ept->bEndpointAddress & 0x80) {
in = ept->bEndpointAddress;
} else {
out = ept->bEndpointAddress;
}
}
info.has_bulk_in = (in != -1);
info.has_bulk_out = (out != -1);
if(callback(&info) == 0) {
*ept_in_id = in;
*ept_out_id = out;
*ifc_id = ifc->bInterfaceNumber;
return 0;
}
}
return -1;
}
static usb_handle *find_usb_device(const char *base, ifc_match_func callback)
{
usb_handle *usb = 0;
char busname[64], devname[64];
char desc[1024];
int n, in, out, ifc;
DIR *busdir, *devdir;
struct dirent *de;
int fd;
int writable;
busdir = opendir(base);
if(busdir == 0) return 0;
while((de = readdir(busdir)) && (usb == 0)) {
if(badname(de->d_name)) continue;
sprintf(busname, "%s/%s", base, de->d_name);
devdir = opendir(busname);
if(devdir == 0) continue;
// DBG("[ scanning %s ]\n", busname);
while((de = readdir(devdir)) && (usb == 0)) {
if(badname(de->d_name)) continue;
sprintf(devname, "%s/%s", busname, de->d_name);
// DBG("[ scanning %s ]\n", devname);
writable = 1;
if((fd = open(devname, O_RDWR)) < 0) {
// Check if we have read-only access, so we can give a helpful
// diagnostic like "adb devices" does.
writable = 0;
if((fd = open(devname, O_RDONLY)) < 0) {
continue;
}
}
n = read(fd, desc, sizeof(desc));
if(filter_usb_device(fd, desc, n, writable, callback,
&in, &out, &ifc) == 0) {
usb = calloc(1, sizeof(usb_handle));
strcpy(usb->fname, devname);
usb->ep_in = in;
usb->ep_out = out;
usb->desc = fd;
n = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &ifc);
if(n != 0) {
close(fd);
free(usb);
usb = 0;
continue;
}
} else {
close(fd);
}
}
closedir(devdir);
}
closedir(busdir);
return usb;
}
int usb_write(usb_handle *h, const void *_data, int len)
{
unsigned char *data = (unsigned char*) _data;
unsigned count = 0;
struct usbdevfs_bulktransfer bulk;
int n;
if(h->ep_out == 0) {
return -1;
}
if(len == 0) {
bulk.ep = h->ep_out;
bulk.len = 0;
bulk.data = data;
bulk.timeout = 0;
n = ioctl(h->desc, USBDEVFS_BULK, &bulk);
if(n != 0) {
fprintf(stderr,"ERROR: n = %d, errno = %d (%s)\n",
n, errno, strerror(errno));
return -1;
}
return 0;
}
while(len > 0) {
int xfer;
xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;
bulk.ep = h->ep_out;
bulk.len = xfer;
bulk.data = data;
bulk.timeout = 0;
n = ioctl(h->desc, USBDEVFS_BULK, &bulk);
if(n != xfer) {
DBG("ERROR: n = %d, errno = %d (%s)\n",
n, errno, strerror(errno));
return -1;
}
count += xfer;
len -= xfer;
data += xfer;
}
return count;
}
int usb_read(usb_handle *h, void *_data, int len)
{
unsigned char *data = (unsigned char*) _data;
unsigned count = 0;
struct usbdevfs_bulktransfer bulk;
int n, retry;
if(h->ep_in == 0) {
return -1;
}
while(len > 0) {
int xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;
bulk.ep = h->ep_in;
bulk.len = xfer;
bulk.data = data;
bulk.timeout = 0;
retry = 0;
do{
DBG("[ usb read %d fd = %d], fname=%s\n", xfer, h->desc, h->fname);
n = ioctl(h->desc, USBDEVFS_BULK, &bulk);
DBG("[ usb read %d ] = %d, fname=%s, Retry %d \n", xfer, n, h->fname, retry);
if( n < 0 ) {
DBG1("ERROR: n = %d, errno = %d (%s)\n",n, errno, strerror(errno));
if ( ++retry > MAX_RETRIES ) return -1;
sleep( 1 );
}
}
while( n < 0 );
count += n;
len -= n;
data += n;
if(n < xfer) {
break;
}
}
return count;
}
void usb_kick(usb_handle *h)
{
int fd;
fd = h->desc;
h->desc = -1;
if(fd >= 0) {
close(fd);
DBG("[ usb closed %d ]\n", fd);
}
}
int usb_close(usb_handle *h)
{
int fd;
fd = h->desc;
h->desc = -1;
if(fd >= 0) {
close(fd);
DBG("[ usb closed %d ]\n", fd);
}
return 0;
}
usb_handle *usb_open(ifc_match_func callback)
{
return find_usb_device("/dev/bus/usb", callback);
}
Reference in a new issue View git blame Copy permalink