diff options
Diffstat (limited to 'usb-linux.c')
| -rw-r--r-- | usb-linux.c | 251 |
1 files changed, 249 insertions, 2 deletions
diff --git a/usb-linux.c b/usb-linux.c index 221ce33..0820ed9 100644 --- a/usb-linux.c +++ b/usb-linux.c @@ -24,11 +24,258 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #include <stdio.h> #include <stdlib.h> -#include <stdlib.h> +#include <stdint.h> +#include <string.h> #include <libusb.h> -int usb_init(void) +#include "usb.h" +#include "log.h" +#include "device.h" + +// interval for device connection/disconnection polling, in milliseconds +// we need this because there is currently no asynchronous device discovery mechanism in libusb +#define DEVICE_POLL_TIME 1000 + +struct usb_device { + libusb_device_handle *dev; + uint8_t bus, address; + char serial[256]; + int alive; +}; + +int num_devs; +int device_id; +struct usb_device *device_list; + +struct timeval next_dev_poll_time; + +static int alloc_device(void) { + int i; + for(i=0; i<num_devs; i++) { + if(!device_list[i].dev) + return i; + } + num_devs++; + device_list = realloc(device_list, sizeof(*device_list) * num_devs); + memset(&device_list[num_devs-1], 0, sizeof(*device_list)); + return num_devs - 1; +} + +static void usb_disconnect(struct usb_device *dev) +{ + if(!dev->dev) { + return; + } + libusb_release_interface(dev->dev, USB_INTERFACE); + libusb_close(dev->dev); + dev->dev = NULL; +} + +static int usb_discover(void) +{ + int cnt, i, j, res; + int valid_count = 0; + libusb_device **devs; + + cnt = libusb_get_device_list(NULL, &devs); + if(cnt < 0) { + usbmuxd_log(LL_FATAL, "Could not get device list: %d", cnt); + return cnt; + } + + usbmuxd_log(LL_SPEW, "usb_discover: scanning %d devices", cnt); + + for(j=0; j<num_devs; j++) { + device_list[j].alive = 0; + } + for(i=0; i<cnt; i++) { + // the following are non-blocking operations on the device list + libusb_device *dev = devs[i]; + uint8_t bus = libusb_get_bus_number(dev); + uint8_t address = libusb_get_device_address(dev); + struct libusb_device_descriptor devdesc; + for(j=0; j<num_devs; j++) { + if(device_list[j].dev && device_list[j].bus == bus && device_list[j].address == address) { + valid_count++; + device_list[j].alive = 1; + break; + } + } + if(j < num_devs) + continue; //device already found + if((res = libusb_get_device_descriptor(dev, &devdesc)) != 0) { + usbmuxd_log(LL_WARNING, "Could not get device descriptor for device %d-%d: %d", bus, address, res); + continue; + } + if(devdesc.idVendor != VID_APPLE) + continue; + if( (devdesc.idProduct != PID_IPHONE2G) && + (devdesc.idProduct != PID_ITOUCH1G) && + (devdesc.idProduct != PID_IPHONE3G)) + continue; + libusb_device_handle *handle; + usbmuxd_log(LL_INFO, "Found new device with v/p %04x:%04x at %d-%d", devdesc.idVendor, devdesc.idProduct, bus, address); + // potentially blocking operations follow; they will only run when new devices are detected, which is acceptable + if((res = libusb_open(dev, &handle)) != 0) { + usbmuxd_log(LL_WARNING, "Could not open device %d-%d: %d", bus, address, res); + continue; + } + if((res = libusb_set_configuration(handle, USB_CONFIGURATION)) != 0) { + usbmuxd_log(LL_WARNING, "Could not set configuration %d for device %d-%d: %d", USB_CONFIGURATION, bus, address, res); + libusb_close(handle); + continue; + } + if((res = libusb_claim_interface(handle, USB_INTERFACE)) != 0) { + usbmuxd_log(LL_WARNING, "Could not claim interface %d for device %d-%d: %d", USB_INTERFACE, bus, address, res); + libusb_close(handle); + continue; + } + int idx = alloc_device(); + + if((res = libusb_get_string_descriptor_ascii(handle, devdesc.iSerialNumber, (uint8_t *)device_list[idx].serial, 256)) <= 0) { + usbmuxd_log(LL_WARNING, "Could not get serial number for device %d-%d: %d", USB_INTERFACE, bus, address, res); + libusb_close(handle); + continue; + } + device_list[idx].serial[res] = 0; + device_list[idx].bus = bus; + device_list[idx].address = address; + device_list[idx].dev = handle; + device_list[idx].alive = 1; + + device_add(&device_list[idx]); + valid_count++; + } + for(j=0; j<num_devs; j++) { + if(device_list[j].dev && !device_list[j].alive) { + device_remove(&device_list[j]); + usb_disconnect(&device_list[j]); + } + } + libusb_free_device_list(devs, 1); + + gettimeofday(&next_dev_poll_time, NULL); + next_dev_poll_time.tv_usec += DEVICE_POLL_TIME * 1000; + next_dev_poll_time.tv_sec += next_dev_poll_time.tv_usec / 1000000; + next_dev_poll_time.tv_usec = next_dev_poll_time.tv_usec % 1000000; + + return valid_count; +} + +const char *usb_get_serial(struct usb_device *dev) +{ + if(!dev->dev) { + return NULL; + } + return dev->serial; +} + +int usb_get_location(struct usb_device *dev) +{ + if(!dev->dev) { + return 0; + } + return (dev->bus << 16) | dev->address; +} + +void usb_get_fds(struct fdlist *list) +{ + const struct libusb_pollfd **usbfds; + const struct libusb_pollfd **p; + usbfds = libusb_get_pollfds(NULL); + if(!usbfds) { + usbmuxd_log(LL_ERROR, "libusb_get_pollfds failed"); + return; + } + p = usbfds; + while(*p) { + fdlist_add(list, FD_USB, (*p)->fd, (*p)->events); + p++; + } + free(usbfds); +} + +static int dev_poll_remain_ms(void) +{ + int msecs; + struct timeval tv; + gettimeofday(&tv, NULL); + msecs = (next_dev_poll_time.tv_sec - tv.tv_sec) * 1000; + msecs += (next_dev_poll_time.tv_usec - tv.tv_usec) / 1000; + if(msecs < 0) + return 0; + return msecs; +} + +int usb_get_timeout(void) +{ + struct timeval tv; + int msec; + int res; + int pollrem; + pollrem = dev_poll_remain_ms(); + res = libusb_get_next_timeout(NULL, &tv); + if(res == 0) + return pollrem; + if(res < 0) { + usbmuxd_log(LL_ERROR, "libusb_get_next_timeout failed: %d", res); + return pollrem; + } + msec = tv.tv_sec * 1000; + msec += tv.tv_usec / 1000; + if(msec > pollrem) + return pollrem; + return msec; +} + +int usb_process(void) +{ + int res; + struct timeval tv; + tv.tv_sec = tv.tv_usec = 0; + res = libusb_handle_events_timeout(NULL, &tv); + if(res < 0) { + usbmuxd_log(LL_ERROR, "libusb_handle_events_timeout failed: %d", res); + return res; + } + if(dev_poll_remain_ms() <= 0) { + res = usb_discover(); + if(res < 0) { + usbmuxd_log(LL_ERROR, "usb_discover failed: %d", res); + return res; + } + } return 0; } + +int usb_init(void) +{ + int res; + usbmuxd_log(LL_DEBUG, "usb_init for linux / libusb 1.0"); + + res = libusb_init(NULL); + if(res != 0) { + usbmuxd_log(LL_FATAL, "libusb_init failed: %d", res); + return -1; + } + + device_id = 1; + num_devs = 1; + device_list = malloc(sizeof(*device_list) * num_devs); + memset(device_list, 0, sizeof(*device_list) * num_devs); + + return usb_discover(); +} + +void usb_shutdown(void) +{ + int i; + usbmuxd_log(LL_DEBUG, "usb_shutdown"); + for(i=0; i<num_devs; i++) + usb_disconnect(&device_list[i]); + free(device_list); + device_list = NULL; + libusb_exit(NULL); +} |