source: mainline/uspace/lib/drv/generic/remote_usb.c@ 087c27f6

/*
 * Copyright (c) 2010 Vojtech Horky
 * Copyright (c) 2011 Jan Vesely
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libdrv
 * @{
 */
/** @file
 */

#include <async.h>
#include <errno.h>

#include "usb_iface.h"
#include "ddf/driver.h"

typedef enum {
        IPC_M_USB_GET_MY_ADDRESS,
        IPC_M_USB_GET_MY_INTERFACE,
        IPC_M_USB_GET_HOST_CONTROLLER_HANDLE,
} usb_iface_funcs_t;

/** Tell USB address assigned to device.
 * @param exch Vaid IPC exchange
 * @param address Pointer to address storage place.
 * @return Error code.
 *
 * Exch param is an open communication to device implementing usb_iface.
 */
int usb_get_my_address(async_exch_t *exch, usb_address_t *address)
{
        if (!exch)
                return EINVAL;
        sysarg_t addr;
        const int ret = async_req_1_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
            IPC_M_USB_GET_MY_ADDRESS, &addr);

        if (ret == EOK && address != NULL)
                *address = (usb_address_t) addr;
        return ret;
}
/*----------------------------------------------------------------------------*/
/** Tell interface number given device can use.
 * @param[in] exch IPC communication exchange
 * @param[in] handle Id of the device
 * @param[out] usb_iface Assigned USB interface
 * @return Error code.
 */
int usb_get_my_interface(async_exch_t *exch, int *usb_iface)
{
        if (!exch)
                return EINVAL;
        sysarg_t iface_no;
        const int ret = async_req_1_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
            IPC_M_USB_GET_MY_INTERFACE, &iface_no);
        if (ret == EOK && usb_iface)
                *usb_iface = (int)iface_no;
        return ret;
}
/*----------------------------------------------------------------------------*/
/** Tell devman handle of device host controller.
 * @param[in] exch IPC communication exchange
 * @param[out] hc_handle devman handle of the HC used by the target device.
 * @return Error code.
 */
int usb_get_hc_handle(async_exch_t *exch, devman_handle_t *hc_handle)
{
        if (!exch)
                return EINVAL;
        devman_handle_t h;
        const int ret = async_req_1_1(exch, DEV_IFACE_ID(USB_DEV_IFACE),
            IPC_M_USB_GET_HOST_CONTROLLER_HANDLE, &h);
        if (ret == EOK && hc_handle)
                *hc_handle = (devman_handle_t)h;
        return ret;
}


static void remote_usb_get_my_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usb_get_my_interface(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usb_get_hc_handle(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);

/** Remote USB interface operations. */
static remote_iface_func_ptr_t remote_usb_iface_ops [] = {
        [IPC_M_USB_GET_MY_ADDRESS] = remote_usb_get_my_address,
        [IPC_M_USB_GET_MY_INTERFACE] = remote_usb_get_my_interface,
        [IPC_M_USB_GET_HOST_CONTROLLER_HANDLE] = remote_usb_get_hc_handle,
};

/** Remote USB interface structure.
 */
remote_iface_t remote_usb_iface = {
        .method_count = sizeof(remote_usb_iface_ops) /
            sizeof(remote_usb_iface_ops[0]),
        .methods = remote_usb_iface_ops
};

/*----------------------------------------------------------------------------*/
void remote_usb_get_my_address(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        const usb_iface_t *usb_iface = (usb_iface_t *) iface;

        if (usb_iface->get_my_address == NULL) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_address_t address;
        const int ret = usb_iface->get_my_address(fun, &address);
        if (ret != EOK) {
                async_answer_0(callid, ret);
        } else {
                async_answer_1(callid, EOK, address);
        }
}
/*----------------------------------------------------------------------------*/
void remote_usb_get_my_interface(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        const usb_iface_t *usb_iface = (usb_iface_t *) iface;

        if (usb_iface->get_my_interface == NULL) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        int iface_no;
        const int ret = usb_iface->get_my_interface(fun, &iface_no);
        if (ret != EOK) {
                async_answer_0(callid, ret);
        } else {
                async_answer_1(callid, EOK, iface_no);
        }
}
/*----------------------------------------------------------------------------*/
void remote_usb_get_hc_handle(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        const usb_iface_t *usb_iface = (usb_iface_t *) iface;

        if (usb_iface->get_hc_handle == NULL) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        devman_handle_t handle;
        const int ret = usb_iface->get_hc_handle(fun, &handle);
        if (ret != EOK) {
                async_answer_0(callid, ret);
        }

        async_answer_1(callid, EOK, (sysarg_t) handle);
}
/**
 * @}
 */