Exemplo n.º 1
0
void usb_core_exit(void)
{
    int i;
    for(i = 0; i < USB_NUM_DRIVERS; i++)
        if(drivers[i].enabled && drivers[i].disconnect != NULL)
        {
            drivers[i].disconnect();
            drivers[i].enabled = false;
        }

    if(initialized) {
        usb_drv_exit();
        initialized = false;
    }
    usb_state = DEFAULT;
#ifdef HAVE_USB_CHARGING_ENABLE
    usb_no_host = false;
    usb_charging_maxcurrent_change(usb_charging_maxcurrent());
#endif
    logf("usb_core_exit() finished");
}
Exemplo n.º 2
0
static void usb_thread(void)
{
    int num_acks_to_expect = 0;
    struct queue_event ev;

    while(1)
    {
        queue_wait(&usb_queue, &ev);
        switch(ev.id)
        {
#ifdef USB_DRIVER_CLOSE
            case USB_QUIT:
                return;
#endif
#ifdef HAVE_USBSTACK
            case USB_TRANSFER_COMPLETION:
                usb_core_handle_transfer_completion(
                    (struct usb_transfer_completion_event_data*)ev.data);
                break;
#endif
#ifdef USB_DETECT_BY_DRV
            /* In this case, these events the handle cable insertion USB
             * driver determines INSERTED/EXTRACTED state. */
            case USB_POWERED:
                /* Set the state to USB_POWERED for now and enable the driver
                 * to detect a bus reset only. If a bus reset is detected,
                 * USB_INSERTED will be received. */
                usb_state = USB_POWERED;
                usb_enable(true);
                break;

            case USB_UNPOWERED:
                usb_enable(false);
                /* This part shouldn't be obligatory for anything that can
                 * reliably detect removal of the data lines. USB_EXTRACTED
                 * could be posted on that event while bus power remains
                 * available. */
                queue_post(&usb_queue, USB_EXTRACTED, 0);
                break;
#endif /* USB_DETECT_BY_DRV */
            case USB_INSERTED:
#ifdef HAVE_LCD_BITMAP
                if(do_screendump_instead_of_usb)
                {
                    usb_state = USB_SCREENDUMP;
                    screen_dump();
#ifdef HAVE_REMOTE_LCD
                    remote_screen_dump();
#endif
                    break;
                }
#endif
#ifdef HAVE_USB_POWER
                if(usb_power_button())
                {
                    /* Only charging is desired */
                    usb_state = USB_POWERED;
#ifdef HAVE_USBSTACK
#ifdef USB_ENABLE_STORAGE
                    usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, false);
#endif

#ifdef USB_ENABLE_HID
#ifdef USB_ENABLE_CHARGING_ONLY
                    usb_core_enable_driver(USB_DRIVER_HID, false);
#else
                    usb_core_enable_driver(USB_DRIVER_HID, true);
#endif /* USB_ENABLE_CHARGING_ONLY */
#endif /* USB_ENABLE_HID */

#ifdef USB_ENABLE_CHARGING_ONLY
                    usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, true);
#endif
                    usb_attach();
#endif
                    break;
                }
#endif /* HAVE_USB_POWER */
#ifdef HAVE_USBSTACK
#ifdef HAVE_USB_POWER
                /* Set the state to USB_POWERED for now. If permission to connect
                 * by threads and storage is granted it will be changed to
                 * USB_CONNECTED. */
                usb_state = USB_POWERED;
#endif
#ifdef USB_ENABLE_STORAGE
                usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, true);
#endif
#ifdef USB_ENABLE_HID
                usb_core_enable_driver(USB_DRIVER_HID, usb_hid);
#endif
#ifdef USB_ENABLE_CHARGING_ONLY
                usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, false);
#endif

                /* Check any drivers enabled at this point for exclusive storage
                 * access requirements. */
                exclusive_storage_access = usb_core_any_exclusive_storage();

                if(!exclusive_storage_access)
                {
                    usb_attach();
                    break;
                }
#endif /* HAVE_USBSTACK */
                /* Tell all threads that they have to back off the storage.
                   We subtract one for our own thread. */
                num_acks_to_expect = queue_broadcast(SYS_USB_CONNECTED, 0) - 1;
                DEBUGF("USB inserted. Waiting for ack from %d threads...\n",
                       num_acks_to_expect);
                break;

            case SYS_USB_CONNECTED_ACK:
                if(num_acks_to_expect > 0 && --num_acks_to_expect == 0)
                {
                    DEBUGF("All threads have acknowledged the connect.\n");
                    usb_slave_mode(true);
                    usb_state = USB_INSERTED;
                }
                else
                {
                    DEBUGF("usb: got ack, %d to go...\n",
                           num_acks_to_expect);
                }
                break;

            case USB_EXTRACTED:
#ifdef HAVE_LCD_BITMAP
                if(usb_state == USB_SCREENDUMP)
                {
                    usb_state = USB_EXTRACTED;
                    break; /* Connected for screendump only */
                }
#endif
#ifndef HAVE_USBSTACK /* Stack must undo this if POWERED state was transitional */
#ifdef HAVE_USB_POWER
                if(usb_state == USB_POWERED)
                {
                    usb_state = USB_EXTRACTED;
                    break;
                }
#endif
#endif /* HAVE_USBSTACK */
                if(usb_state == USB_INSERTED)
                {
                    /* Only disable the USB mode if we really have enabled it
                       some threads might not have acknowledged the
                       insertion */
                    usb_slave_mode(false);
                }

                usb_state = USB_EXTRACTED;
#ifdef HAVE_USBSTACK
                if(!exclusive_storage_access)
                {
#ifndef USB_DETECT_BY_DRV /* Disabled handling USB_UNPOWERED */
                    usb_enable(false);
#endif
                    break;
                }

#endif /* HAVE_USBSTACK */
                num_acks_to_expect = usb_release_exclusive_storage();

                break;

            case SYS_USB_DISCONNECTED_ACK:
                if(num_acks_to_expect > 0 && --num_acks_to_expect == 0)
                {
                    DEBUGF("All threads have acknowledged. "
                           "We're in business.\n");
                }
                else
                {
                    DEBUGF("usb: got ack, %d to go...\n",
                           num_acks_to_expect);
                }
                break;

#ifdef HAVE_HOTSWAP
            case SYS_HOTSWAP_INSERTED:
            case SYS_HOTSWAP_EXTRACTED:
#ifdef HAVE_USBSTACK
                usb_core_hotswap_event(1,ev.id == SYS_HOTSWAP_INSERTED);
#else  /* !HAVE_USBSTACK */
                if(usb_state == USB_INSERTED)
                {
#if (CONFIG_STORAGE & STORAGE_MMC)
                    usb_enable(false);
                    usb_mmc_countdown = HZ/2; /* re-enable after 0.5 sec */
#endif /* STORAGE_MMC */
                }
#endif /* HAVE_USBSTACK */
                break;

#if (CONFIG_STORAGE & STORAGE_MMC)
            case USB_REENABLE:
                if(usb_state == USB_INSERTED)
                    usb_enable(true);  /* reenable only if still inserted */
                break;
#endif /* STORAGE_MMC */
#endif /* HAVE_HOTSWAP */

#ifdef USB_FIREWIRE_HANDLING
            case USB_REQUEST_REBOOT:
#ifdef HAVE_USB_POWER
                if (usb_reboot_button())
#endif
                    try_reboot();
                break;
#endif /* USB_FIREWIRE_HANDLING */

#if defined(HAVE_USB_CHARGING_ENABLE) && defined(HAVE_USBSTACK)
            case USB_CHARGER_UPDATE:
                usb_charging_maxcurrent_change(usb_charging_maxcurrent());
                break;
#endif
        }
    }
}