auto import from //depot/cupcake/@135843
diff --git a/adb/usb_linux.c b/adb/usb_linux.c
new file mode 100644
index 0000000..32ce0a9
--- /dev/null
+++ b/adb/usb_linux.c
@@ -0,0 +1,654 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#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 <ctype.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 "sysdeps.h"
+
+#define TRACE_TAG TRACE_USB
+#include "adb.h"
+
+
+/* usb scan debugging is waaaay too verbose */
+#define DBGX(x...)
+
+static adb_mutex_t usb_lock = ADB_MUTEX_INITIALIZER;
+
+struct usb_handle
+{
+ usb_handle *prev;
+ usb_handle *next;
+
+ char fname[64];
+ int desc;
+ unsigned char ep_in;
+ unsigned char ep_out;
+
+ unsigned zero_mask;
+
+ struct usbdevfs_urb urb_in;
+ struct usbdevfs_urb urb_out;
+
+ int urb_in_busy;
+ int urb_out_busy;
+ int dead;
+
+ adb_cond_t notify;
+ adb_mutex_t lock;
+
+ // for garbage collecting disconnected devices
+ int mark;
+
+ // ID of thread currently in REAPURB
+ pthread_t reaper_thread;
+};
+
+static usb_handle handle_list = {
+ .prev = &handle_list,
+ .next = &handle_list,
+};
+
+static int known_device(const char *dev_name)
+{
+ usb_handle *usb;
+
+ adb_mutex_lock(&usb_lock);
+ for(usb = handle_list.next; usb != &handle_list; usb = usb->next){
+ if(!strcmp(usb->fname, dev_name)) {
+ // set mark flag to indicate this device is still alive
+ usb->mark = 1;
+ adb_mutex_unlock(&usb_lock);
+ return 1;
+ }
+ }
+ adb_mutex_unlock(&usb_lock);
+ return 0;
+}
+
+static void kick_disconnected_devices()
+{
+ usb_handle *usb;
+
+ adb_mutex_lock(&usb_lock);
+ // kick any devices in the device list that were not found in the device scan
+ for(usb = handle_list.next; usb != &handle_list; usb = usb->next){
+ if (usb->mark == 0) {
+ usb_kick(usb);
+ } else {
+ usb->mark = 0;
+ }
+ }
+ adb_mutex_unlock(&usb_lock);
+
+}
+
+static void register_device(const char *dev_name, unsigned char ep_in, unsigned char ep_out,
+ int ifc, const char *serial, unsigned zero_mask);
+
+static inline int badname(const char *name)
+{
+ while(*name) {
+ if(!isdigit(*name++)) return 1;
+ }
+ return 0;
+}
+
+static int find_usb_device(const char *base,
+ void (*register_device_callback) (const char *, unsigned char, unsigned char, int, const char *, unsigned))
+{
+ char busname[32], devname[32];
+ unsigned char local_ep_in, local_ep_out;
+ DIR *busdir , *devdir ;
+ struct dirent *de;
+ int fd ;
+ int found_device = 0;
+ char serial[256];
+
+ busdir = opendir(base);
+ if(busdir == 0) return 0;
+
+ while((de = readdir(busdir)) != 0) {
+ if(badname(de->d_name)) continue;
+
+ snprintf(busname, sizeof busname, "%s/%s", base, de->d_name);
+ devdir = opendir(busname);
+ if(devdir == 0) continue;
+
+// DBGX("[ scanning %s ]\n", busname);
+ while((de = readdir(devdir))) {
+ unsigned char devdesc[256];
+ unsigned char* bufptr = devdesc;
+ struct usb_device_descriptor* device;
+ struct usb_config_descriptor* config;
+ struct usb_interface_descriptor* interface;
+ struct usb_endpoint_descriptor *ep1, *ep2;
+ unsigned zero_mask = 0;
+ unsigned vid, pid;
+ int i, interfaces;
+ size_t desclength;
+
+ if(badname(de->d_name)) continue;
+ snprintf(devname, sizeof devname, "%s/%s", busname, de->d_name);
+
+ if(known_device(devname)) {
+ DBGX("skipping %s\n", devname);
+ continue;
+ }
+
+// DBGX("[ scanning %s ]\n", devname);
+ if((fd = unix_open(devname, O_RDWR)) < 0) {
+ continue;
+ }
+
+ desclength = adb_read(fd, devdesc, sizeof(devdesc));
+
+ // should have device and configuration descriptors, and atleast two endpoints
+ if (desclength < USB_DT_DEVICE_SIZE + USB_DT_CONFIG_SIZE) {
+ D("desclength %d is too small\n", desclength);
+ adb_close(fd);
+ continue;
+ }
+
+ device = (struct usb_device_descriptor*)bufptr;
+ bufptr += USB_DT_DEVICE_SIZE;
+
+ if((device->bLength != USB_DT_DEVICE_SIZE) || (device->bDescriptorType != USB_DT_DEVICE)) {
+ adb_close(fd);
+ continue;
+ }
+
+ vid = __le16_to_cpu(device->idVendor);
+ pid = __le16_to_cpu(device->idProduct);
+ pid = devdesc[10] | (devdesc[11] << 8);
+ DBGX("[ %s is V:%04x P:%04x ]\n", devname, vid, pid);
+
+ // should have config descriptor next
+ config = (struct usb_config_descriptor *)bufptr;
+ bufptr += USB_DT_CONFIG_SIZE;
+ if (config->bLength != USB_DT_CONFIG_SIZE || config->bDescriptorType != USB_DT_CONFIG) {
+ D("usb_config_descriptor not found\n");
+ adb_close(fd);
+ continue;
+ }
+
+ // loop through all the interfaces and look for the ADB interface
+ interfaces = config->bNumInterfaces;
+ for (i = 0; i < interfaces; i++) {
+ if (bufptr + USB_DT_ENDPOINT_SIZE > devdesc + desclength)
+ break;
+
+ interface = (struct usb_interface_descriptor *)bufptr;
+ bufptr += USB_DT_INTERFACE_SIZE;
+ if (interface->bLength != USB_DT_INTERFACE_SIZE ||
+ interface->bDescriptorType != USB_DT_INTERFACE) {
+ D("usb_interface_descriptor not found\n");
+ break;
+ }
+
+ DBGX("bInterfaceClass: %d, bInterfaceSubClass: %d,"
+ "bInterfaceProtocol: %d, bNumEndpoints: %d\n",
+ interface->bInterfaceClass, interface->bInterfaceSubClass,
+ interface->bInterfaceProtocol, interface->bNumEndpoints);
+
+ if (interface->bNumEndpoints == 2 &&
+ is_adb_interface(vid, pid, interface->bInterfaceClass,
+ interface->bInterfaceSubClass, interface->bInterfaceProtocol)) {
+
+ DBGX("looking for bulk endpoints\n");
+ // looks like ADB...
+ ep1 = (struct usb_endpoint_descriptor *)bufptr;
+ bufptr += USB_DT_ENDPOINT_SIZE;
+ ep2 = (struct usb_endpoint_descriptor *)bufptr;
+ bufptr += USB_DT_ENDPOINT_SIZE;
+
+ if (bufptr > devdesc + desclength ||
+ ep1->bLength != USB_DT_ENDPOINT_SIZE ||
+ ep1->bDescriptorType != USB_DT_ENDPOINT ||
+ ep2->bLength != USB_DT_ENDPOINT_SIZE ||
+ ep2->bDescriptorType != USB_DT_ENDPOINT) {
+ D("endpoints not found\n");
+ break;
+ }
+
+ // both endpoints should be bulk
+ if (ep1->bmAttributes != USB_ENDPOINT_XFER_BULK ||
+ ep2->bmAttributes != USB_ENDPOINT_XFER_BULK) {
+ D("bulk endpoints not found\n");
+ continue;
+ }
+
+ /* aproto 01 needs 0 termination */
+ if(interface->bInterfaceProtocol == 0x01) {
+ zero_mask = ep1->wMaxPacketSize - 1;
+ }
+
+ // we have a match. now we just need to figure out which is in and which is out.
+ if (ep1->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
+ local_ep_in = ep1->bEndpointAddress;
+ local_ep_out = ep2->bEndpointAddress;
+ } else {
+ local_ep_in = ep2->bEndpointAddress;
+ local_ep_out = ep1->bEndpointAddress;
+ }
+
+ // read the device's serial number
+ serial[0] = 0;
+ memset(serial, 0, sizeof(serial));
+ if (device->iSerialNumber) {
+ struct usbdevfs_ctrltransfer ctrl;
+ __u16 buffer[128];
+ int result;
+
+ memset(buffer, 0, sizeof(buffer));
+ memset(&ctrl, 0, sizeof(ctrl));
+
+ ctrl.bRequestType = USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE;
+ ctrl.bRequest = USB_REQ_GET_DESCRIPTOR;
+ ctrl.wValue = (USB_DT_STRING << 8) | device->iSerialNumber;
+ ctrl.wIndex = 0;
+ ctrl.wLength = sizeof(buffer);
+ ctrl.data = buffer;
+
+ 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++)
+ serial[i - 1] = buffer[i];
+ serial[i - 1] = 0;
+ }
+ }
+
+ register_device_callback(devname, local_ep_in, local_ep_out,
+ interface->bInterfaceNumber, serial, zero_mask);
+
+ found_device = 1;
+ break;
+ } else {
+ // skip to next interface
+ bufptr += (interface->bNumEndpoints * USB_DT_ENDPOINT_SIZE);
+ }
+ } // end of for
+
+ adb_close(fd);
+ } // end of devdir while
+ closedir(devdir);
+ } //end of busdir while
+ closedir(busdir);
+
+ return found_device;
+}
+
+void usb_cleanup()
+{
+}
+
+static int usb_bulk_write(usb_handle *h, const void *data, int len)
+{
+ struct usbdevfs_urb *urb = &h->urb_out;
+ int res;
+
+ memset(urb, 0, sizeof(*urb));
+ urb->type = USBDEVFS_URB_TYPE_BULK;
+ urb->endpoint = h->ep_out;
+ urb->status = -1;
+ urb->buffer = (void*) data;
+ urb->buffer_length = len;
+
+ D("++ write ++\n");
+
+ adb_mutex_lock(&h->lock);
+ if(h->dead) {
+ res = -1;
+ goto fail;
+ }
+ do {
+ res = ioctl(h->desc, USBDEVFS_SUBMITURB, urb);
+ } while((res < 0) && (errno == EINTR));
+
+ if(res < 0) {
+ goto fail;
+ }
+
+ res = -1;
+ h->urb_out_busy = 1;
+ for(;;) {
+ adb_cond_wait(&h->notify, &h->lock);
+ if(h->dead) {
+ break;
+ }
+ if(h->urb_out_busy == 0) {
+ if(urb->status == 0) {
+ res = urb->actual_length;
+ }
+ break;
+ }
+ }
+fail:
+ adb_mutex_unlock(&h->lock);
+ D("-- write --\n");
+ return res;
+}
+
+static int usb_bulk_read(usb_handle *h, void *data, int len)
+{
+ struct usbdevfs_urb *urb = &h->urb_in;
+ struct usbdevfs_urb *out = NULL;
+ int res;
+
+ memset(urb, 0, sizeof(*urb));
+ urb->type = USBDEVFS_URB_TYPE_BULK;
+ urb->endpoint = h->ep_in;
+ urb->status = -1;
+ urb->buffer = data;
+ urb->buffer_length = len;
+
+
+ adb_mutex_lock(&h->lock);
+ if(h->dead) {
+ res = -1;
+ goto fail;
+ }
+ do {
+ res = ioctl(h->desc, USBDEVFS_SUBMITURB, urb);
+ } while((res < 0) && (errno == EINTR));
+
+ if(res < 0) {
+ goto fail;
+ }
+
+ h->urb_in_busy = 1;
+ for(;;) {
+ D("[ reap urb - wait ]\n");
+ h->reaper_thread = pthread_self();
+ adb_mutex_unlock(&h->lock);
+ res = ioctl(h->desc, USBDEVFS_REAPURB, &out);
+ adb_mutex_lock(&h->lock);
+ h->reaper_thread = 0;
+ if(h->dead) {
+ res = -1;
+ break;
+ }
+ if(res < 0) {
+ if(errno == EINTR) {
+ continue;
+ }
+ D("[ reap urb - error ]\n");
+ break;
+ }
+ D("[ urb @%p status = %d, actual = %d ]\n",
+ out, out->status, out->actual_length);
+
+ if(out == &h->urb_in) {
+ D("[ reap urb - IN complete ]\n");
+ h->urb_in_busy = 0;
+ if(urb->status == 0) {
+ res = urb->actual_length;
+ } else {
+ res = -1;
+ }
+ break;
+ }
+ if(out == &h->urb_out) {
+ D("[ reap urb - OUT compelete ]\n");
+ h->urb_out_busy = 0;
+ adb_cond_broadcast(&h->notify);
+ }
+ }
+fail:
+ adb_mutex_unlock(&h->lock);
+ return res;
+}
+
+
+int usb_write(usb_handle *h, const void *_data, int len)
+{
+ unsigned char *data = (unsigned char*) _data;
+ int n;
+ int need_zero = 0;
+
+ if(h->zero_mask) {
+ /* if we need 0-markers and our transfer
+ ** is an even multiple of the packet size,
+ ** we make note of it
+ */
+ if(!(len & h->zero_mask)) {
+ need_zero = 1;
+ }
+ }
+
+ while(len > 0) {
+ int xfer = (len > 4096) ? 4096 : len;
+
+ n = usb_bulk_write(h, data, xfer);
+ if(n != xfer) {
+ D("ERROR: n = %d, errno = %d (%s)\n",
+ n, errno, strerror(errno));
+ return -1;
+ }
+
+ len -= xfer;
+ data += xfer;
+ }
+
+ if(need_zero){
+ n = usb_bulk_write(h, _data, 0);
+ return n;
+ }
+
+ return 0;
+}
+
+int usb_read(usb_handle *h, void *_data, int len)
+{
+ unsigned char *data = (unsigned char*) _data;
+ int n;
+
+ D("++ usb_read ++\n");
+ while(len > 0) {
+ int xfer = (len > 4096) ? 4096 : len;
+
+ D("[ usb read %d fd = %d], fname=%s\n", xfer, h->desc, h->fname);
+ n = usb_bulk_read(h, data, xfer);
+ D("[ usb read %d ] = %d, fname=%s\n", xfer, n, h->fname);
+ if(n != xfer) {
+ if((errno == ETIMEDOUT) && (h->desc != -1)) {
+ D("[ timeout ]\n");
+ if(n > 0){
+ data += n;
+ len -= n;
+ }
+ continue;
+ }
+ D("ERROR: n = %d, errno = %d (%s)\n",
+ n, errno, strerror(errno));
+ return -1;
+ }
+
+ len -= xfer;
+ data += xfer;
+ }
+
+ D("-- usb_read --\n");
+ return 0;
+}
+
+void usb_kick(usb_handle *h)
+{
+ D("[ kicking %p (fd = %d) ]\n", h, h->desc);
+ adb_mutex_lock(&h->lock);
+ if(h->dead == 0) {
+ h->dead = 1;
+
+ /* HACK ALERT!
+ ** Sometimes we get stuck in ioctl(USBDEVFS_REAPURB).
+ ** This is a workaround for that problem.
+ */
+ if (h->reaper_thread) {
+ pthread_kill(h->reaper_thread, SIGALRM);
+ }
+
+ /* cancel any pending transactions
+ ** these will quietly fail if the txns are not active,
+ ** but this ensures that a reader blocked on REAPURB
+ ** will get unblocked
+ */
+ ioctl(h->desc, USBDEVFS_DISCARDURB, &h->urb_in);
+ ioctl(h->desc, USBDEVFS_DISCARDURB, &h->urb_out);
+ h->urb_in.status = -ENODEV;
+ h->urb_out.status = -ENODEV;
+ h->urb_in_busy = 0;
+ h->urb_out_busy = 0;
+ adb_cond_broadcast(&h->notify);
+ }
+ adb_mutex_unlock(&h->lock);
+}
+
+int usb_close(usb_handle *h)
+{
+ D("[ usb close ... ]\n");
+ adb_mutex_lock(&usb_lock);
+ h->next->prev = h->prev;
+ h->prev->next = h->next;
+ h->prev = 0;
+ h->next = 0;
+
+ adb_close(h->desc);
+ D("[ usb closed %p (fd = %d) ]\n", h, h->desc);
+ adb_mutex_unlock(&usb_lock);
+
+ free(h);
+ return 0;
+}
+
+static void register_device(const char *dev_name,
+ unsigned char ep_in, unsigned char ep_out,
+ int interface,
+ const char *serial, unsigned zero_mask)
+{
+ usb_handle* usb = 0;
+ int n = 0;
+
+ /* Since Linux will not reassign the device ID (and dev_name)
+ ** as long as the device is open, we can add to the list here
+ ** once we open it and remove from the list when we're finally
+ ** closed and everything will work out fine.
+ **
+ ** If we have a usb_handle on the list 'o handles with a matching
+ ** name, we have no further work to do.
+ */
+ adb_mutex_lock(&usb_lock);
+ for(usb = handle_list.next; usb != &handle_list; usb = usb->next){
+ if(!strcmp(usb->fname, dev_name)) {
+ adb_mutex_unlock(&usb_lock);
+ return;
+ }
+ }
+ adb_mutex_unlock(&usb_lock);
+
+ D("[ usb located new device %s (%d/%d/%d) ]\n",
+ dev_name, ep_in, ep_out, interface);
+ usb = calloc(1, sizeof(usb_handle));
+ strcpy(usb->fname, dev_name);
+ usb->ep_in = ep_in;
+ usb->ep_out = ep_out;
+ usb->zero_mask = zero_mask;
+
+ adb_cond_init(&usb->notify, 0);
+ adb_mutex_init(&usb->lock, 0);
+ /* initialize mark to 1 so we don't get garbage collected after the device scan */
+ usb->mark = 1;
+ usb->reaper_thread = 0;
+
+ usb->desc = unix_open(usb->fname, O_RDWR);
+ if(usb->desc < 0) goto fail;
+ D("[ usb open %s fd = %d]\n", usb->fname, usb->desc);
+ n = ioctl(usb->desc, USBDEVFS_CLAIMINTERFACE, &interface);
+ if(n != 0) goto fail;
+
+ /* add to the end of the active handles */
+ adb_mutex_lock(&usb_lock);
+ usb->next = &handle_list;
+ usb->prev = handle_list.prev;
+ usb->prev->next = usb;
+ usb->next->prev = usb;
+ adb_mutex_unlock(&usb_lock);
+
+ register_usb_transport(usb, serial);
+ return;
+
+fail:
+ D("[ usb open %s error=%d, err_str = %s]\n",
+ usb->fname, errno, strerror(errno));
+ if(usb->desc >= 0) {
+ adb_close(usb->desc);
+ }
+ free(usb);
+}
+
+void* device_poll_thread(void* unused)
+{
+ D("Created device thread\n");
+ for(;;) {
+ /* XXX use inotify */
+ find_usb_device("/dev/bus/usb", register_device);
+ kick_disconnected_devices();
+ sleep(1);
+ }
+ return NULL;
+}
+
+static void sigalrm_handler(int signo)
+{
+ // don't need to do anything here
+}
+
+void usb_init()
+{
+ adb_thread_t tid;
+ struct sigaction actions;
+
+ memset(&actions, 0, sizeof(actions));
+ sigemptyset(&actions.sa_mask);
+ actions.sa_flags = 0;
+ actions.sa_handler = sigalrm_handler;
+ sigaction(SIGALRM,& actions, NULL);
+
+ if(adb_thread_create(&tid, device_poll_thread, NULL)){
+ fatal_errno("cannot create input thread");
+ }
+}
+