[Feauture] support adbd listening on tcp port with uci config
Change-Id: Ic885b955900cf3cf20322ba5f54ff47d1eedf0ef
diff --git a/src/devtools/adb_tcp/usb_linux_client.c b/src/devtools/adb_tcp/usb_linux_client.c
new file mode 100644
index 0000000..2466275
--- /dev/null
+++ b/src/devtools/adb_tcp/usb_linux_client.c
@@ -0,0 +1,744 @@
+/*
+ * 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 <linux/usb/ch9.h>
+#include <linux/usb/functionfs.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <errno.h>
+#include <stddef.h>
+#include <sys/epoll.h>
+
+#include "sysdeps.h"
+
+#define TRACE_TAG TRACE_USB
+#include "adb.h"
+
+#define MAX_PACKET_SIZE_FS 64
+#define MAX_PACKET_SIZE_HS 512
+#define MAX_PACKET_SIZE_SS 1024
+
+//#define cpu_to_le16(x) htole16(x)
+//#define cpu_to_le32(x) htole32(x)
+/*
+ * cpu_to_le16/32 are used when initializing structures, a context where a
+ * function call is not allowed. To solve this, we code cpu_to_le16/32 in a way
+ * that allows them to be used when initializing structures.
+ */
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define cpu_to_le16(x) (x)
+#define cpu_to_le32(x) (x)
+#else
+#define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
+#define cpu_to_le32(x) \
+ ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \
+ (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24))
+#endif
+
+#define FFS_CONTOL_MAX_EPOLL_EVENT 50
+#define DEBUG 0
+
+struct usb_handle
+{
+ adb_cond_t notify;
+ adb_mutex_t lock;
+
+ int (*write)(usb_handle *h, const void *data, int len);
+ int (*read)(usb_handle *h, void *data, int len);
+ void (*kick)(usb_handle *h);
+
+ // Legacy f_adb
+ int fd;
+
+ // FunctionFS
+ int control;
+ int bulk_out; /* "out" from the host's perspective => source for adbd */
+ int bulk_in; /* "in" from the host's perspective => sink for adbd */
+ bool ffs_control_thread_created;
+};
+
+static const struct {
+ __le32 magic;
+ __le32 length;
+ __le32 flags;
+ __le32 fs_count;
+ __le32 hs_count;
+ __le32 ss_count;
+ struct {
+ struct usb_interface_descriptor intf;
+ struct usb_endpoint_descriptor_no_audio source;
+ struct usb_endpoint_descriptor_no_audio sink;
+ } __attribute__((packed)) fs_descs, hs_descs;
+ struct {
+ struct usb_interface_descriptor intf;
+ struct usb_endpoint_descriptor_no_audio source;
+ struct usb_ss_ep_comp_descriptor source_comp;
+ struct usb_endpoint_descriptor_no_audio sink;
+ struct usb_ss_ep_comp_descriptor sink_comp;
+ } __attribute__((packed)) ss_descs;
+} __attribute__((packed)) descriptors = {
+ .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2),
+ .length = cpu_to_le32(sizeof(descriptors)),
+ .flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC |
+ FUNCTIONFS_HAS_HS_DESC |
+ FUNCTIONFS_HAS_SS_DESC),
+ .fs_count = 3,
+ .hs_count = 3,
+ .ss_count = 5,
+ .fs_descs = {
+ .intf = {
+ .bLength = sizeof(descriptors.fs_descs.intf),
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = ADB_CLASS,
+ .bInterfaceSubClass = ADB_SUBCLASS,
+ .bInterfaceProtocol = ADB_PROTOCOL,
+ .iInterface = 1, /* first string from the provided table */
+ },
+ .source = {
+ .bLength = sizeof(descriptors.fs_descs.source),
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 1 | USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = MAX_PACKET_SIZE_FS,
+ },
+ .sink = {
+ .bLength = sizeof(descriptors.fs_descs.sink),
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 2 | USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = MAX_PACKET_SIZE_FS,
+ },
+ },
+ .hs_descs = {
+ .intf = {
+ .bLength = sizeof(descriptors.hs_descs.intf),
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = ADB_CLASS,
+ .bInterfaceSubClass = ADB_SUBCLASS,
+ .bInterfaceProtocol = ADB_PROTOCOL,
+ .iInterface = 1, /* first string from the provided table */
+ },
+ .source = {
+ .bLength = sizeof(descriptors.hs_descs.source),
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 1 | USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = MAX_PACKET_SIZE_HS,
+ },
+ .sink = {
+ .bLength = sizeof(descriptors.hs_descs.sink),
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 2 | USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = MAX_PACKET_SIZE_HS,
+ },
+ },
+ .ss_descs = {
+ .intf = {
+ .bLength = sizeof(descriptors.ss_descs.intf),
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bInterfaceNumber = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = ADB_CLASS,
+ .bInterfaceSubClass = ADB_SUBCLASS,
+ .bInterfaceProtocol = ADB_PROTOCOL,
+ .iInterface = 1, /* first string from the provided table */
+ },
+ .source = {
+ .bLength = sizeof(descriptors.ss_descs.source),
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 1 | USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = MAX_PACKET_SIZE_SS,
+ },
+ .source_comp = {
+ .bLength = sizeof(descriptors.ss_descs.source_comp),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ },
+ .sink = {
+ .bLength = sizeof(descriptors.ss_descs.sink),
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = 2 | USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = MAX_PACKET_SIZE_SS,
+ },
+ .sink_comp = {
+ .bLength = sizeof(descriptors.ss_descs.sink_comp),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ },
+ },
+};
+
+#define STR_INTERFACE_ "ADB Interface"
+
+static const struct {
+ struct usb_functionfs_strings_head header;
+ struct {
+ __le16 code;
+ const char str1[sizeof(STR_INTERFACE_)];
+ } __attribute__((packed)) lang0;
+} __attribute__((packed)) strings = {
+ .header = {
+ .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC),
+ .length = cpu_to_le32(sizeof(strings)),
+ .str_count = cpu_to_le32(1),
+ .lang_count = cpu_to_le32(1),
+ },
+ .lang0 = {
+ cpu_to_le16(0x0409), /* en-us */
+ STR_INTERFACE_,
+ },
+};
+
+static void *usb_adb_open_thread(void *x)
+{
+ struct usb_handle *usb = (struct usb_handle *)x;
+ int fd;
+
+ while (1) {
+ // wait until the USB device needs opening
+ adb_mutex_lock(&usb->lock);
+ while (usb->fd != -1)
+ adb_cond_wait(&usb->notify, &usb->lock);
+ adb_mutex_unlock(&usb->lock);
+
+ D("[ usb_thread - opening device ]\n");
+ do {
+ /* XXX use inotify? */
+ fd = unix_open("/dev/android_adb", O_RDWR);
+ if (fd < 0) {
+ // to support older kernels
+ fd = unix_open("/dev/android", O_RDWR);
+ }
+ if (fd < 0) {
+ adb_sleep_ms(1000);
+ }
+ } while (fd < 0);
+ D("[ opening device succeeded ]\n");
+
+ close_on_exec(fd);
+ usb->fd = fd;
+
+ D("[ usb_thread - registering device ]\n");
+ register_usb_transport(usb, 0, 0, 1);
+ }
+
+ // never gets here
+ return 0;
+}
+
+static int usb_adb_write(usb_handle *h, const void *data, int len)
+{
+ int n;
+
+ D("about to write (fd=%d, len=%d)\n", h->fd, len);
+ n = adb_write(h->fd, data, len);
+ if(n != len) {
+ D("ERROR: fd = %d, n = %d, errno = %d (%s)\n",
+ h->fd, n, errno, strerror(errno));
+ return -1;
+ }
+ D("[ done fd=%d ]\n", h->fd);
+ return 0;
+}
+
+static int usb_adb_read(usb_handle *h, void *data, int len)
+{
+ int n;
+
+ D("about to read (fd=%d, len=%d)\n", h->fd, len);
+ n = adb_read(h->fd, data, len);
+ if(n != len) {
+ D("ERROR: fd = %d, n = %d, errno = %d (%s)\n",
+ h->fd, n, errno, strerror(errno));
+ return -1;
+ }
+ D("[ done fd=%d ]\n", h->fd);
+ return 0;
+}
+
+static void usb_adb_kick(usb_handle *h)
+{
+ D("usb_kick\n");
+ adb_mutex_lock(&h->lock);
+ adb_close(h->fd);
+ h->fd = -1;
+
+ // notify usb_adb_open_thread that we are disconnected
+ adb_cond_signal(&h->notify);
+ adb_mutex_unlock(&h->lock);
+}
+
+static void usb_adb_init()
+{
+ usb_handle *h;
+ adb_thread_t tid;
+ int fd;
+
+ h = calloc(1, sizeof(usb_handle));
+ if (h == 0) {
+ fatal("cannot allocate usb_handle");
+ return;
+ }
+
+ h->write = usb_adb_write;
+ h->read = usb_adb_read;
+ h->kick = usb_adb_kick;
+ h->bulk_in = -1;
+ h->bulk_out = -1;
+ h->control = -1;
+ h->ffs_control_thread_created = false;
+ h->fd = -1;
+
+ adb_cond_init(&h->notify, 0);
+ adb_mutex_init(&h->lock, 0);
+
+ // Open the file /dev/android_adb_enable to trigger
+ // the enabling of the adb USB function in the kernel.
+ // We never touch this file again - just leave it open
+ // indefinitely so the kernel will know when we are running
+ // and when we are not.
+ fd = unix_open("/dev/android_adb_enable", O_RDWR);
+ if (fd < 0) {
+ D("failed to open /dev/android_adb_enable\n");
+ } else {
+ close_on_exec(fd);
+ }
+
+ D("[ usb_init - starting thread ]\n");
+ if(adb_thread_create(&tid, usb_adb_open_thread, h)){
+ fatal_errno("cannot create usb thread");
+ }
+}
+
+static void *ffs_control_read_msg_thread(void *_h)
+{
+ usb_handle *h = _h;
+ int fd = h->control;
+
+ char buf[MAX_PACKET_SIZE_FS];
+ int size = 0;//event.u.setup.wLength;
+ if (DEBUG) D("FUNCTIONFS_SETUP acking host-to-device control transfer size=%d", size);
+ if (size+1 > MAX_PACKET_SIZE_FS) {
+ D("package size larger than MAX_PACKET_SIZE_FS");
+ return 0;
+ }
+
+ if (DEBUG) D("FUNCTIONFS_SETUP before get host-to-device msg size:%d", size);
+ int rc = adb_read(fd, buf, size);
+ if (DEBUG) D("FUNCTIONFS_SETUP after get host-to-device msg rc:%d", rc);
+ if (rc != size) {
+ D("Read %d bytes when trying to read control request, expected %d", rc, size);
+ }
+ return 0;
+}
+
+static char* ffs_get_event_type_code(int type) {
+ char* code;
+ switch(type) {
+ case FUNCTIONFS_BIND:
+ code = "BIND";
+ break;
+ case FUNCTIONFS_UNBIND:
+ code = "UNBIND";
+ break;
+ case FUNCTIONFS_ENABLE:
+ code = "ENABLE";
+ break;
+ case FUNCTIONFS_DISABLE:
+ code = "DISABLE";
+ break;
+ case FUNCTIONFS_SETUP:
+ code = "SETUP";
+ break;
+ case FUNCTIONFS_SUSPEND:
+ code = "SUSPEND";
+ break;
+ case FUNCTIONFS_RESUME:
+ code = "RESUME";
+ break;
+ default:
+ code = "UNKNOWN";
+ break;
+ }
+ return code;
+}
+
+static void ffs_control_event_handler(usb_handle *h) {
+ int fd = h->control;
+ struct usb_functionfs_event event;
+ int ret = 0;
+
+ if (DEBUG) D("start remote usb read control fd:%d size=%d\n", fd, (int)sizeof(event));
+ ret = adb_read(fd, &event, sizeof(event));
+ if (DEBUG) D("done remote usb read control ret=%d size=%d\n", ret, (int)sizeof(event));
+ if (ret != sizeof(event)) {
+ if (DEBUG) D("remote usb: read size:%d not expect to event size:%d\n", ret, (int)sizeof(event));
+ return;
+ }
+
+ D("event.type: %s\n", ffs_get_event_type_code(event.type));
+
+ switch (event.type) {
+ case FUNCTIONFS_SETUP: {
+ D("received FUNCTIONFS_SETUP");
+ D("bRequestType = %d",(int)(event.u.setup.bRequestType));
+ D("bRequest = %d\n", (int)(event.u.setup.bRequest));
+ D("wValue = %d\n", (int)(event.u.setup.wValue));
+ D("wIndex = %d\n", (int)(event.u.setup.wIndex));
+ D("wLength = %d\n", (int)(event.u.setup.wLength));
+
+ if ((event.u.setup.bRequestType & USB_DIR_IN)) {
+ if (DEBUG) D("FUNCTIONFS_SETUP acking device-to-host control transfer");
+ int rc = adb_write(fd, "", 0);
+ if (rc != 0) {
+ D("Failed to write empty packet to host");
+ break;
+ }
+ } else {
+ adb_thread_t ffs_control_read_msg_thread_ptr;
+
+ if(adb_thread_create(&ffs_control_read_msg_thread_ptr, ffs_control_read_msg_thread, h)) {
+ fatal_errno("cannot create control thread");
+ }
+
+
+ if (DEBUG) D("Wait 100ms before kill read msg thread");
+ adb_sleep_ms(100);
+ int ret = pthread_cancel(ffs_control_read_msg_thread_ptr);
+ D("Done kill the read msg thread ret=%d", ret);
+ }
+ }
+ }
+}
+
+// -1 means failure
+static int epoll_add_fd(int epfd, int fd) {
+ struct epoll_event ev;
+ memset(&ev, 0, sizeof(ev));
+ ev.data.fd = fd;
+ ev.events = EPOLLIN;
+ // don't set the fd to edge trigger
+ // the some event like accept may be lost if two or more clients are connecting to server at the same time
+ // level trigger is preferred to avoid event lost
+ // do not set EPOLLOUT due to it will always trigger when write is available
+ if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev) == -1) {
+ D("epoll_add_fd3() epoll_ctl() failed reason=[%s]%d epfd=%d fd=%d",
+ strerror(errno), errno, epfd, fd);
+ return -1;
+ }
+ return 0;
+}
+
+static void *ffs_control_thread(void *_h)
+{
+ usb_handle *h = _h;
+ int control_fd = h->control;
+ struct epoll_event events[FFS_CONTOL_MAX_EPOLL_EVENT];
+
+ int epfd = epoll_create(FFS_CONTOL_MAX_EPOLL_EVENT);
+ if(epfd == -1) {
+ D("ERR: epoll_create() fail reason=[%s]", strerror(errno));
+ return 0;
+ }
+
+ epoll_add_fd(epfd, control_fd);
+
+ while(1) {
+ int i;
+ int n;
+
+ D("Before ffs control thread epoll_wait");
+ n = epoll_wait(epfd, events, FFS_CONTOL_MAX_EPOLL_EVENT , -1);
+
+ for(i = 0; i < n; i++) {
+ if(events[i].data.fd == control_fd) {
+ if(events[i].events & EPOLLIN) {
+ if (DEBUG) D("control_fd event triggered");
+ ffs_control_event_handler(h);
+ }
+ }
+ }
+ }
+}
+
+void ffs_create_control_thread(usb_handle *h) {
+ if (h->control >= 0) { // only for ffs usb
+ if (!h->ffs_control_thread_created) {
+ adb_thread_t ffs_control_thread_ptr;
+
+ if(adb_thread_create(&ffs_control_thread_ptr, ffs_control_thread, h)){
+ fatal_errno("cannot create ffs_control_thread");
+ } else {
+ h->ffs_control_thread_created = true;
+ if (DEBUG) D("Created ffs_control_thread success");
+ }
+ }
+ }
+}
+
+static void init_functionfs(struct usb_handle *h)
+{
+ ssize_t ret;
+
+ if (h->control < 0) { // might have already done this before
+ D("OPENING %s\n", USB_FFS_ADB_EP0);
+ h->control = adb_open(USB_FFS_ADB_EP0, O_RDWR);
+ if (h->control < 0) {
+ D("[ %s: cannot open control endpoint: errno=%d]\n", USB_FFS_ADB_EP0, errno);
+ goto err;
+ }
+
+ ret = adb_write(h->control, &descriptors, sizeof(descriptors));
+ if (ret < 0) {
+ D("[ %s: write descriptors failed: errno=%d ]\n", USB_FFS_ADB_EP0, errno);
+ goto err;
+ }
+
+ ret = adb_write(h->control, &strings, sizeof(strings));
+ if (ret < 0) {
+ D("[ %s: writing strings failed: errno=%d]\n", USB_FFS_ADB_EP0, errno);
+ goto err;
+ }
+ }
+
+ h->bulk_out = adb_open(USB_FFS_ADB_OUT, O_RDWR);
+ if (h->bulk_out < 0) {
+ D("[ %s: cannot open bulk-out ep: errno=%d ]\n", USB_FFS_ADB_OUT, errno);
+ goto err;
+ }
+
+ h->bulk_in = adb_open(USB_FFS_ADB_IN, O_RDWR);
+ if (h->bulk_in < 0) {
+ D("[ %s: cannot open bulk-in ep: errno=%d ]\n", USB_FFS_ADB_IN, errno);
+ goto err;
+ }
+
+ ffs_create_control_thread(h);
+ return;
+
+err:
+ if (h->bulk_in > 0) {
+ adb_close(h->bulk_in);
+ h->bulk_in = -1;
+ }
+ if (h->bulk_out > 0) {
+ adb_close(h->bulk_out);
+ h->bulk_out = -1;
+ }
+ if (h->control > 0) {
+ adb_close(h->control);
+ h->control = -1;
+ }
+ return;
+}
+
+static void *usb_ffs_open_thread(void *x)
+{
+ struct usb_handle *usb = (struct usb_handle *)x;
+
+ while (1) {
+ // wait until the USB device needs opening
+ adb_mutex_lock(&usb->lock);
+ while (usb->control != -1 && usb->bulk_in != -1 && usb->bulk_out != -1)
+ adb_cond_wait(&usb->notify, &usb->lock);
+ adb_mutex_unlock(&usb->lock);
+
+ while (1) {
+ init_functionfs(usb);
+
+ if (usb->control >= 0 && usb->bulk_in >= 0 && usb->bulk_out >= 0)
+ break;
+
+ adb_sleep_ms(1000);
+ }
+
+ D("[ usb_thread - registering device ]\n");
+ register_usb_transport(usb, 0, 0, 1);
+ }
+
+ // never gets here
+ return 0;
+}
+
+static int bulk_write(int bulk_in, const char *buf, size_t length)
+{
+ size_t count = 0;
+ int ret;
+
+ do {
+ ret = adb_write(bulk_in, buf + count, length - count);
+ if (ret < 0) {
+ if (errno != EINTR)
+ return ret;
+ } else {
+ count += ret;
+ }
+ } while (count < length);
+
+ D("[ bulk_write done fd=%d ]\n", bulk_in);
+ return count;
+}
+
+static int usb_ffs_write(usb_handle *h, const void *data, int len)
+{
+ int n;
+
+ D("about to write (fd=%d, len=%d)\n", h->bulk_in, len);
+ n = bulk_write(h->bulk_in, data, len);
+ if (n != len) {
+ D("ERROR: fd = %d, n = %d, errno = %d (%s)\n",
+ h->bulk_in, n, errno, strerror(errno));
+ return -1;
+ }
+ D("[ done fd=%d ]\n", h->bulk_in);
+ return 0;
+}
+
+static int bulk_read(int bulk_out, char *buf, size_t length)
+{
+ size_t count = 0;
+ int ret;
+
+ do {
+ ret = adb_read(bulk_out, buf + count, length - count);
+ if (ret < 0) {
+ if (errno != EINTR) {
+ D("[ bulk_read failed fd=%d length=%zu count=%zu ]\n",
+ bulk_out, length, count);
+ return ret;
+ }
+ } else {
+ count += ret;
+ }
+ } while (count < length);
+
+ return count;
+}
+
+static int usb_ffs_read(usb_handle *h, void *data, int len)
+{
+ int n;
+
+ D("about to read (fd=%d, len=%d)\n", h->bulk_out, len);
+ n = bulk_read(h->bulk_out, data, len);
+ if (n != len) {
+ D("ERROR: fd = %d, n = %d, errno = %d (%s)\n",
+ h->bulk_out, n, errno, strerror(errno));
+ return -1;
+ }
+ D("[ done fd=%d ]\n", h->bulk_out);
+ return 0;
+}
+
+static void usb_ffs_kick(usb_handle *h)
+{
+ int err;
+
+ err = ioctl(h->bulk_in, FUNCTIONFS_CLEAR_HALT);
+ if (err < 0)
+ D("[ kick: source (fd=%d) clear halt failed (%d) ]", h->bulk_in, errno);
+
+ err = ioctl(h->bulk_out, FUNCTIONFS_CLEAR_HALT);
+ if (err < 0)
+ D("[ kick: sink (fd=%d) clear halt failed (%d) ]", h->bulk_out, errno);
+
+ adb_mutex_lock(&h->lock);
+
+ // don't close ep0 here, since we may not need to reinitialize it with
+ // the same descriptors again. if however ep1/ep2 fail to re-open in
+ // init_functionfs, only then would we close and open ep0 again.
+ adb_close(h->bulk_out);
+ adb_close(h->bulk_in);
+ h->bulk_out = h->bulk_in = -1;
+
+ // notify usb_ffs_open_thread that we are disconnected
+ adb_cond_signal(&h->notify);
+ adb_mutex_unlock(&h->lock);
+}
+
+static void usb_ffs_init()
+{
+ usb_handle *h;
+ adb_thread_t tid;
+
+ D("[ usb_init - using FunctionFS ]\n");
+
+ h = calloc(1, sizeof(usb_handle));
+ if (h == 0) {
+ fatal("cannot allocate usb_handle");
+ return;
+ }
+
+ h->write = usb_ffs_write;
+ h->read = usb_ffs_read;
+ h->kick = usb_ffs_kick;
+
+ h->control = -1;
+ h->bulk_out = -1;
+ h->bulk_out = -1;
+ h->ffs_control_thread_created = false;
+
+ adb_cond_init(&h->notify, 0);
+ adb_mutex_init(&h->lock, 0);
+
+ D("[ usb_init - starting thread ]\n");
+ if (adb_thread_create(&tid, usb_ffs_open_thread, h)){
+ fatal_errno("[ cannot create usb thread ]\n");
+ }
+}
+
+void usb_init()
+{
+ if (access(USB_FFS_ADB_EP0, F_OK) == 0)
+ usb_ffs_init();
+ else
+ usb_adb_init();
+}
+
+void usb_cleanup()
+{
+}
+
+int usb_write(usb_handle *h, const void *data, int len)
+{
+ return h->write(h, data, len);
+}
+
+int usb_read(usb_handle *h, void *data, int len)
+{
+ return h->read(h, data, len);
+}
+int usb_close(usb_handle *h)
+{
+ return 0;
+}
+
+void usb_kick(usb_handle *h)
+{
+ h->kick(h);
+}