Subversion Repositories freemyipod

//

//

//    Copyright 2011 user890104

//

//

//    This file is part of emCORE.

//

//    emCORE is free software: you can redistribute it and/or

//    modify it under the terms of the GNU General Public License as

//    published by the Free Software Foundation, either version 2 of the

//    License, or (at your option) any later version.

//

//    emCORE is distributed in the hope that it will be useful,

//    but WITHOUT ANY WARRANTY; without even the implied warranty of

//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

//    See the GNU General Public License for more details.

//

//    You should have received a copy of the GNU General Public License along

//    with emCORE.  If not, see <http://www.gnu.org/licenses/>.

//

//

#include "global.h"

#include "emcore.h"

#include "util.h"

#include "usb.h"

libusb_context* usb_ctx = NULL;

libusb_device_handle* usb_handle = NULL;

extern struct emcore_usb_endpoints_addr emcore_usb_eps_addr;

extern struct emcore_usb_endpoints_max_packet_size emcore_usb_eps_mps;

int usb_init(void)

{

    int res;

#ifdef DEBUG

    fprintf(stderr, "Initialising USB library...\n");

#endif

    res = libusb_init(&usb_ctx);

    if (LIBUSB_SUCCESS != res)

    {

        return res;

    }

#ifdef DEBUG

    fprintf(stderr, "USB library initialized!\n");

    libusb_set_debug(usb_ctx, 3);

#endif

    return LIBUSB_SUCCESS;

}

int usb_find(uint16_t vendor_id, uint16_t product_id, uint8_t* reattach)

{

    libusb_device **devs, *dev;

    ssize_t devs_cnt;

    int res, i;

    struct libusb_device_descriptor dev_desc;

    uint8_t found = 0;

    struct libusb_config_descriptor* cfg_desc;

    const struct libusb_interface* iface;

    const struct libusb_interface_descriptor* iface_desc;

    const struct libusb_endpoint_descriptor* ep_desc;

#ifdef DEBUG

    fprintf(stderr, "Getting USB device list...\n");

#endif

    devs_cnt = libusb_get_device_list(usb_ctx, &devs);

    if (devs_cnt < 0)

    {

        return devs_cnt;

    }

#ifdef DEBUG

    fprintf(stderr, "Found %d USB devices!\n", devs_cnt);

#endif

    for (i = 0; i < devs_cnt; ++i)

    {

        dev = devs[i];

#ifdef DEBUG

        fprintf(stderr, "Getting device descriptor of USB device %d...\n", i);

#endif

        res = libusb_get_device_descriptor(dev, &dev_desc);

        if (LIBUSB_SUCCESS != res)

        {

#ifdef DEBUG

            fprintf(stderr, "Unable to get device descriptor of device %d!\n", i);

#endif

            continue;

        }

#ifdef DEBUG

        fprintf(stderr, "[%04x:%04x] bus %d, device %d, USB ver. %04x\n", dev_desc.idVendor,

            dev_desc.idProduct, libusb_get_bus_number(dev),

            libusb_get_device_address(dev), dev_desc.bcdUSB);

#endif

        if (vendor_id == dev_desc.idVendor && product_id == dev_desc.idProduct)

        {

#ifdef DEBUG

            fprintf(stderr, "Found emCORE USB device!\n");

#endif

            if (1 != dev_desc.bNumConfigurations)

            {

#ifdef DEBUG

                fprintf(stderr, "Number of configs is different than 1, not the right device...\n");

#endif

                continue;

            }

#ifdef DEBUG

            fprintf(stderr, "Getting config descriptor 0 of device...\n");

#endif

            res = libusb_get_config_descriptor(dev, 0, &cfg_desc);

            if (LIBUSB_SUCCESS != res)

            {

                return res;

            }

            if (1 != cfg_desc->bNumInterfaces)

            {

#ifdef DEBUG

                fprintf(stderr, "Wrong USB device, it should have exactly 1 interface\n");

#endif

                continue;

            }

            iface = &cfg_desc->interface[0];

            if (1 != iface->num_altsetting)

            {

#ifdef DEBUG

                fprintf(stderr, "Wrong USB device, it should have exactly 1 altsetting\n");

#endif

                continue;

            }

            iface_desc = &iface->altsetting[0];

            if (4 != iface_desc->bNumEndpoints)

            {

#ifdef DEBUG

                fprintf(stderr, "Wrong USB device, it should have exactly 4 endpoints\n");

#endif

                continue;

            }

#ifdef DEBUG

           fprintf(stderr, "Endpoints:");

#endif

            for (i = 0; i < 4; ++i)

            {

                ep_desc = &iface_desc->endpoint[i];

#ifdef DEBUG

                fprintf(stderr, " %d at 0x%02x", i, ep_desc->bEndpointAddress);

#endif

                switch (i) {

                    case 0:

                        emcore_usb_eps_addr.cout = ep_desc->bEndpointAddress;

                    break;

                    case 1:

                        emcore_usb_eps_addr.cin = ep_desc->bEndpointAddress;

                    break;

                    case 2:

                        emcore_usb_eps_addr.dout = ep_desc->bEndpointAddress;

                    break;

                    case 3:

                        emcore_usb_eps_addr.din = ep_desc->bEndpointAddress;

                    break;

                }

            }

#ifdef DEBUG

            fprintf(stderr, "\n");

#endif

            found = 1;

        }

    }

    if (found)

    {

        res = usb_open(dev, reattach);

    }

    else

    {

        fprintf(stderr, "USB device with VID=%4x and PID=%4x not found!\n",

            vendor_id, product_id);

        res = EMCORE_ERROR_NO_DEVICE;

    }

#ifdef DEBUG

    fprintf(stderr, "Freeing device list...\n");

#endif

    libusb_free_device_list(devs, 1);

    return res;

}

int usb_open(libusb_device* dev, uint8_t* reattach)

{

    int res;

#ifdef DEBUG

    fprintf(stderr, "Opening USB device...\n");

#endif

    res = libusb_open(dev, &usb_handle);

    if (LIBUSB_SUCCESS != res)

    {

        return res;

    }

#ifdef DEBUG

    fprintf(stderr, "USB device opened!\n");

    fprintf(stderr, "Setting USB configuration 1...\n");

#endif

    res = libusb_set_configuration(usb_handle, 1);

    if (LIBUSB_SUCCESS != res)

    {

        return res;

    }

#ifdef DEBUG

    fprintf(stderr, "USB configuration set!\n");

#endif

    res = libusb_kernel_driver_active(usb_handle, 0);

    if (1 == res)

    {

        *reattach = 1;

        res = libusb_detach_kernel_driver(usb_handle, 0);

    }

    if (LIBUSB_SUCCESS != res)

    {

        return res;

    }

#ifdef DEBUG

    fprintf(stderr, "Claiming interface 0...\n");

#endif

    res = libusb_claim_interface(usb_handle, 0);

    if (LIBUSB_SUCCESS != res)

    {

        return res;

    }

#ifdef DEBUG

    fprintf(stderr, "Interface claimed successfully!\n");

    fprintf(stderr, "Getting endpoints max size...\n");

#endif

    res = emcore_get_packet_info(&emcore_usb_eps_mps);

    if (EMCORE_SUCCESS != res)

    {

        return res;

    }

#ifdef DEBUG

    fprintf(stderr, "Got endpoint max size!\n");

    fprintf(stderr, "COUT max pckt: %d, CIN max pckt: %d, DOUT max pckt: %d, DIN max pckt: %d\n",

        emcore_usb_eps_mps.cout, emcore_usb_eps_mps.cin, emcore_usb_eps_mps.dout, emcore_usb_eps_mps.din

    );

#endif

    return LIBUSB_SUCCESS;

}

int usb_bulk_transfer(unsigned char endpoint, void* data, int length)

{

    int transferred;

    int res;

    res = libusb_bulk_transfer(usb_handle, endpoint, (unsigned char*)data, length, &transferred, 30000);

    if (LIBUSB_SUCCESS != res)

    {

        return res;

    }

    if (transferred != length)

    {

        return EMCORE_ERROR_INCOMPLETE;

    }

    return LIBUSB_SUCCESS;

}

int usb_close(uint8_t reattach) {

    int res;

#ifdef DEBUG

    fprintf(stderr, "Releasing USB interface...\n");

#endif

    res = libusb_release_interface(usb_handle, 0);

    if (LIBUSB_SUCCESS != res)

    {

        return res;

    }

#ifdef DEBUG

    fprintf(stderr, "Released interface successfully!\n");

#endif

    if (reattach)

    {

#ifdef DEBUG

        fprintf(stderr, "Reattaching kernel driver...\n");

#endif

        res = libusb_attach_kernel_driver(usb_handle, 0);

        if (LIBUSB_SUCCESS == res)

        {

#ifdef DEBUG

            fprintf(stderr, "Reattached successfully!\n");

#endif

        }

        else

        {

            print_error(res);

            res = LIBUSB_SUCCESS;

        }

    }

#ifdef DEBUG

    fprintf(stderr, "Closing USB device handle...\n");

#endif

    libusb_close(usb_handle);

    return res;

}

void usb_exit(void)

{

#ifdef DEBUG

    fprintf(stderr, "Deinitializing USB library...\n");

#endif

    libusb_exit(usb_ctx);

}

int usb_destroy(uint8_t reattach)

{

    int res = LIBUSB_SUCCESS;

    if (usb_handle)

    {

        res = usb_close(reattach);

    }

    if (usb_ctx)

    {

        usb_exit();

    }

    return res;

}