iface.c

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/*
 * Copyright (c) 2011 Vojtech Horky, 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.
 */
#include <ddf/driver.h>
#include <errno.h>

#include <usb/debug.h>
#include <usb/host/endpoint.h>

#include "iface.h"
#include "batch.h"
#include "hc.h"

static inline int setup_batch(
    ddf_fun_t *fun, usb_target_t target, usb_direction_t direction,
    void *data, size_t size, void * setup_data, size_t setup_size,
    usbhc_iface_transfer_in_callback_t in,
    usbhc_iface_transfer_out_callback_t out, void *arg, const char* name,
    hc_t **hc, usb_transfer_batch_t **batch)
{
        assert(hc);
        assert(batch);
        assert(fun);
        *hc = fun_to_hc(fun);
        assert(*hc);

        size_t res_bw;
        endpoint_t *ep = usb_endpoint_manager_get_ep(&(*hc)->ep_manager,
            target.address, target.endpoint, direction, &res_bw);
        if (ep == NULL) {
                usb_log_error("Endpoint(%d:%d) not registered for %s.\n",
                    target.address, target.endpoint, name);
                return ENOENT;
        }

        usb_log_debug("%s %d:%d %zu(%zu).\n",
            name, target.address, target.endpoint, size, ep->max_packet_size);

        const size_t bw = bandwidth_count_usb11(
            ep->speed, ep->transfer_type, size, ep->max_packet_size);
        if (res_bw < bw) {
                usb_log_error("Endpoint(%d:%d) %s needs %zu bw "
                    "but only %zu is reserved.\n",
                    target.address, target.endpoint, name, bw, res_bw);
                return ENOSPC;
        }

        *batch = batch_get(
                fun, ep, data, size, setup_data, setup_size, in, out, arg);
        if (!*batch)
                return ENOMEM;
        return EOK;
}
/*----------------------------------------------------------------------------*/
static int request_address(
    ddf_fun_t *fun, usb_speed_t speed, usb_address_t *address)
{
        assert(fun);
        hc_t *hc = fun_to_hc(fun);
        assert(hc);
        assert(address);

        usb_log_debug("Address request with speed %d.\n", speed);
        *address = device_keeper_get_free_address(&hc->manager, speed);
        usb_log_debug("Address request with result: %d.\n", *address);
        if (*address <= 0)
                return *address;
        return EOK;
}
/*----------------------------------------------------------------------------*/
static int bind_address(
  ddf_fun_t *fun, usb_address_t address, devman_handle_t handle)
{
        assert(fun);
        hc_t *hc = fun_to_hc(fun);
        assert(hc);
        usb_log_debug("Address bind %d-%" PRIun ".\n", address, handle);
        usb_device_keeper_bind(&hc->manager, address, handle);
        return EOK;
}
/*----------------------------------------------------------------------------*/
static int find_by_address(ddf_fun_t *fun, usb_address_t address,
    devman_handle_t *handle)
{
        assert(fun);
        hc_t *hc = fun_to_hc(fun);
        assert(hc);
        const bool found =
            usb_device_keeper_find_by_address(&hc->manager, address, handle);
        return found ? EOK : ENOENT;
}
/*----------------------------------------------------------------------------*/
static int release_address(ddf_fun_t *fun, usb_address_t address)
{
        assert(fun);
        hc_t *hc = fun_to_hc(fun);
        assert(hc);
        usb_log_debug("Address release %d.\n", address);
        usb_device_keeper_release(&hc->manager, address);
        return EOK;
}
/*----------------------------------------------------------------------------*/
static int register_endpoint(
    ddf_fun_t *fun, usb_address_t address, usb_speed_t ep_speed,
    usb_endpoint_t endpoint,
    usb_transfer_type_t transfer_type, usb_direction_t direction,
    size_t max_packet_size, unsigned int interval)
{
        assert(fun);
        hc_t *hc = fun_to_hc(fun);
        assert(hc);
        const size_t size = max_packet_size;
        usb_speed_t speed = usb_device_keeper_get_speed(&hc->manager, address);
        if (speed >= USB_SPEED_MAX) {
                speed = ep_speed;
        }
        usb_log_debug("Register endpoint %d:%d %s %s(%d) %zu(%zu) %u.\n",
            address, endpoint, usb_str_transfer_type(transfer_type),
            usb_str_speed(speed), direction, size, max_packet_size, interval);

        return usb_endpoint_manager_add_ep(&hc->ep_manager, address, endpoint,
            direction, transfer_type, speed, max_packet_size, size);
}
/*----------------------------------------------------------------------------*/
static int unregister_endpoint(
    ddf_fun_t *fun, usb_address_t address,
    usb_endpoint_t endpoint, usb_direction_t direction)
{
        assert(fun);
        hc_t *hc = fun_to_hc(fun);
        assert(hc);
        usb_log_debug("Unregister endpoint %d:%d %d.\n",
            address, endpoint, direction);
        return usb_endpoint_manager_unregister_ep(&hc->ep_manager, address,
            endpoint, direction);
}
/*----------------------------------------------------------------------------*/
static int interrupt_out(
    ddf_fun_t *fun, usb_target_t target, void *data,
    size_t size, usbhc_iface_transfer_out_callback_t callback, void *arg)
{
        usb_transfer_batch_t *batch = NULL;
        hc_t *hc = NULL;
        int ret = setup_batch(fun, target, USB_DIRECTION_OUT, data, size,
            NULL, 0, NULL, callback, arg, "Interrupt OUT", &hc, &batch);
        if (ret != EOK)
                return ret;
        assert(batch);
        assert(hc);
        batch_interrupt_out(batch);
        ret = hc_schedule(hc, batch);
        if (ret != EOK) {
                usb_transfer_batch_dispose(batch);
        }
        return ret;
}
/*----------------------------------------------------------------------------*/
static int interrupt_in(
    ddf_fun_t *fun, usb_target_t target, void *data,
    size_t size, usbhc_iface_transfer_in_callback_t callback, void *arg)
{
        usb_transfer_batch_t *batch = NULL;
        hc_t *hc = NULL;
        int ret = setup_batch(fun, target, USB_DIRECTION_IN, data, size,
            NULL, 0, callback, NULL, arg, "Interrupt IN", &hc, &batch);
        if (ret != EOK)
                return ret;
        assert(batch);
        assert(hc);
        batch_interrupt_in(batch);
        ret = hc_schedule(hc, batch);
        if (ret != EOK) {
                usb_transfer_batch_dispose(batch);
        }
        return ret;
}
/*----------------------------------------------------------------------------*/
static int bulk_out(
    ddf_fun_t *fun, usb_target_t target, void *data,
    size_t size, usbhc_iface_transfer_out_callback_t callback, void *arg)
{
        usb_transfer_batch_t *batch = NULL;
        hc_t *hc = NULL;
        int ret = setup_batch(fun, target, USB_DIRECTION_OUT, data, size,
            NULL, 0, NULL, callback, arg, "Bulk OUT", &hc, &batch);
        if (ret != EOK)
                return ret;
        assert(batch);
        assert(hc);
        batch_bulk_out(batch);
        ret = hc_schedule(hc, batch);
        if (ret != EOK) {
                usb_transfer_batch_dispose(batch);
        }
        return ret;
}
/*----------------------------------------------------------------------------*/
static int bulk_in(
    ddf_fun_t *fun, usb_target_t target, void *data,
    size_t size, usbhc_iface_transfer_in_callback_t callback, void *arg)
{
        usb_transfer_batch_t *batch = NULL;
        hc_t *hc = NULL;
        int ret = setup_batch(fun, target, USB_DIRECTION_IN, data, size,
            NULL, 0, callback, NULL, arg, "Bulk IN", &hc, &batch);
        if (ret != EOK)
                return ret;
        assert(batch);
        assert(hc);
        batch_bulk_in(batch);
        ret = hc_schedule(hc, batch);
        if (ret != EOK) {
                usb_transfer_batch_dispose(batch);
        }
        return ret;
}
/*----------------------------------------------------------------------------*/
static int control_write(
    ddf_fun_t *fun, usb_target_t target,
    void *setup_data, size_t setup_size, void *data, size_t size,
    usbhc_iface_transfer_out_callback_t callback, void *arg)
{
        usb_transfer_batch_t *batch = NULL;
        hc_t *hc = NULL;
        int ret = setup_batch(fun, target, USB_DIRECTION_BOTH, data, size,
            setup_data, setup_size, NULL, callback, arg, "Control WRITE",
            &hc, &batch);
        if (ret != EOK)
                return ret;
        assert(batch);
        assert(hc);
        usb_endpoint_manager_reset_if_need(&hc->ep_manager, target, setup_data);
        batch_control_write(batch);
        ret = hc_schedule(hc, batch);
        if (ret != EOK) {
                usb_transfer_batch_dispose(batch);
        }
        return ret;
}
/*----------------------------------------------------------------------------*/
static int control_read(
    ddf_fun_t *fun, usb_target_t target,
    void *setup_data, size_t setup_size, void *data, size_t size,
    usbhc_iface_transfer_in_callback_t callback, void *arg)
{
        usb_transfer_batch_t *batch = NULL;
        hc_t *hc = NULL;
        int ret = setup_batch(fun, target, USB_DIRECTION_BOTH, data, size,
            setup_data, setup_size, callback, NULL, arg, "Control READ",
            &hc, &batch);
        if (ret != EOK)
                return ret;
        assert(batch);
        assert(hc);
        batch_control_read(batch);
        ret = hc_schedule(hc, batch);
        if (ret != EOK) {
                usb_transfer_batch_dispose(batch);
        }
        return ret;
}
/*----------------------------------------------------------------------------*/
usbhc_iface_t hc_iface = {
        .request_address = request_address,
        .bind_address = bind_address,
        .find_by_address = find_by_address,
        .release_address = release_address,

        .register_endpoint = register_endpoint,
        .unregister_endpoint = unregister_endpoint,

        .interrupt_out = interrupt_out,
        .interrupt_in = interrupt_in,

        .bulk_out = bulk_out,
        .bulk_in = bulk_in,

        .control_write = control_write,
        .control_read = control_read,
};

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