remote_usbhc.c

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/*
 * Copyright (c) 2010-2011 Vojtech Horky
 * 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 <async.h>
#include <errno.h>
#include <assert.h>

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

#define USB_MAX_PAYLOAD_SIZE 1020
#define HACK_MAX_PACKET_SIZE 8
#define HACK_MAX_PACKET_SIZE_INTERRUPT_IN 4

static void remote_usbhc_interrupt_out(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_interrupt_in(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_bulk_out(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_bulk_in(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_write(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_read(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_request_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_bind_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_find_by_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_release_address(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_register_endpoint(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_unregister_endpoint(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);
//static void remote_usbhc(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *);

static remote_iface_func_ptr_t remote_usbhc_iface_ops [] = {
        remote_usbhc_request_address,
        remote_usbhc_bind_address,
        remote_usbhc_find_by_address,
        remote_usbhc_release_address,

        remote_usbhc_interrupt_out,
        remote_usbhc_interrupt_in,

        remote_usbhc_bulk_out,
        remote_usbhc_bulk_in,

        remote_usbhc_control_write,
        remote_usbhc_control_read,

        remote_usbhc_register_endpoint,
        remote_usbhc_unregister_endpoint
};

remote_iface_t remote_usbhc_iface = {
        .method_count = sizeof(remote_usbhc_iface_ops) /
            sizeof(remote_usbhc_iface_ops[0]),
        .methods = remote_usbhc_iface_ops
};

typedef struct {
        ipc_callid_t caller;
        ipc_callid_t data_caller;
        void *buffer;
        void *setup_packet;
        size_t size;
} async_transaction_t;

static void async_transaction_destroy(async_transaction_t *trans)
{
        if (trans == NULL) {
                return;
        }

        if (trans->setup_packet != NULL) {
                free(trans->setup_packet);
        }
        if (trans->buffer != NULL) {
                free(trans->buffer);
        }

        free(trans);
}

static async_transaction_t *async_transaction_create(ipc_callid_t caller)
{
        async_transaction_t *trans = malloc(sizeof(async_transaction_t));
        if (trans == NULL) {
                return NULL;
        }

        trans->caller = caller;
        trans->data_caller = 0;
        trans->buffer = NULL;
        trans->setup_packet = NULL;
        trans->size = 0;

        return trans;
}

void remote_usbhc_request_address(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

        if (!usb_iface->request_address) {
                async_answer_0(callid, ENOTSUP);
                return;
        }
        
        usb_speed_t speed = DEV_IPC_GET_ARG1(*call);

        usb_address_t address;
        int rc = usb_iface->request_address(fun, speed, &address);
        if (rc != EOK) {
                async_answer_0(callid, rc);
        } else {
                async_answer_1(callid, EOK, (sysarg_t) address);
        }
}

void remote_usbhc_bind_address(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

        if (!usb_iface->bind_address) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);
        devman_handle_t handle = (devman_handle_t) DEV_IPC_GET_ARG2(*call);

        int rc = usb_iface->bind_address(fun, address, handle);

        async_answer_0(callid, rc);
}

void remote_usbhc_find_by_address(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

        if (!usb_iface->find_by_address) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);
        devman_handle_t handle;
        int rc = usb_iface->find_by_address(fun, address, &handle);

        if (rc == EOK) {
                async_answer_1(callid, EOK, handle);
        } else {
                async_answer_0(callid, rc);
        }
}

void remote_usbhc_release_address(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

        if (!usb_iface->release_address) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);

        int rc = usb_iface->release_address(fun, address);

        async_answer_0(callid, rc);
}


static void callback_out(ddf_fun_t *fun,
    int outcome, void *arg)
{
        async_transaction_t *trans = (async_transaction_t *)arg;

        async_answer_0(trans->caller, outcome);

        async_transaction_destroy(trans);
}

static void callback_in(ddf_fun_t *fun,
    int outcome, size_t actual_size, void *arg)
{
        async_transaction_t *trans = (async_transaction_t *)arg;

        if (outcome != EOK) {
                async_answer_0(trans->caller, outcome);
                if (trans->data_caller) {
                        async_answer_0(trans->data_caller, EINTR);
                }
                async_transaction_destroy(trans);
                return;
        }

        trans->size = actual_size;

        if (trans->data_caller) {
                async_data_read_finalize(trans->data_caller,
                    trans->buffer, actual_size);
        }

        async_answer_0(trans->caller, EOK);

        async_transaction_destroy(trans);
}

static void remote_usbhc_out_transfer(ddf_fun_t *fun,
    ipc_callid_t callid, ipc_call_t *call,
    usbhc_iface_transfer_out_t transfer_func)
{
        if (!transfer_func) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_target_t target = {
                .address = DEV_IPC_GET_ARG1(*call),
                .endpoint = DEV_IPC_GET_ARG2(*call)
        };

        size_t len = 0;
        void *buffer = NULL;

        int rc = async_data_write_accept(&buffer, false,
            1, USB_MAX_PAYLOAD_SIZE,
            0, &len);

        if (rc != EOK) {
                async_answer_0(callid, rc);
                return;
        }

        async_transaction_t *trans = async_transaction_create(callid);
        if (trans == NULL) {
                if (buffer != NULL) {
                        free(buffer);
                }
                async_answer_0(callid, ENOMEM);
                return;
        }

        trans->buffer = buffer;
        trans->size = len;

        rc = transfer_func(fun, target,
            buffer, len,
            callback_out, trans);

        if (rc != EOK) {
                async_answer_0(callid, rc);
                async_transaction_destroy(trans);
        }
}

static void remote_usbhc_in_transfer(ddf_fun_t *fun,
    ipc_callid_t callid, ipc_call_t *call,
    usbhc_iface_transfer_in_t transfer_func)
{
        if (!transfer_func) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_target_t target = {
                .address = DEV_IPC_GET_ARG1(*call),
                .endpoint = DEV_IPC_GET_ARG2(*call)
        };

        size_t len;
        ipc_callid_t data_callid;
        if (!async_data_read_receive(&data_callid, &len)) {
                async_answer_0(callid, EPARTY);
                return;
        }

        async_transaction_t *trans = async_transaction_create(callid);
        if (trans == NULL) {
                async_answer_0(data_callid, ENOMEM);
                async_answer_0(callid, ENOMEM);
                return;
        }
        trans->data_caller = data_callid;
        trans->buffer = malloc(len);
        trans->size = len;

        int rc = transfer_func(fun, target,
            trans->buffer, len,
            callback_in, trans);

        if (rc != EOK) {
                async_answer_0(data_callid, rc);
                async_answer_0(callid, rc);
                async_transaction_destroy(trans);
        }
}

void remote_usbhc_interrupt_out(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
        assert(usb_iface != NULL);

        return remote_usbhc_out_transfer(fun, callid, call,
            usb_iface->interrupt_out);
}

void remote_usbhc_interrupt_in(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
        assert(usb_iface != NULL);

        return remote_usbhc_in_transfer(fun, callid, call,
            usb_iface->interrupt_in);
}

void remote_usbhc_bulk_out(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
        assert(usb_iface != NULL);

        return remote_usbhc_out_transfer(fun, callid, call,
            usb_iface->bulk_out);
}

void remote_usbhc_bulk_in(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
        assert(usb_iface != NULL);

        return remote_usbhc_in_transfer(fun, callid, call,
            usb_iface->bulk_in);
}

void remote_usbhc_control_write(ddf_fun_t *fun, void *iface,
ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
        assert(usb_iface != NULL);

        if (!usb_iface->control_write) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_target_t target = {
                .address = DEV_IPC_GET_ARG1(*call),
                .endpoint = DEV_IPC_GET_ARG2(*call)
        };
        size_t data_buffer_len = DEV_IPC_GET_ARG3(*call);

        int rc;

        void *setup_packet = NULL;
        void *data_buffer = NULL;
        size_t setup_packet_len = 0;

        rc = async_data_write_accept(&setup_packet, false,
            1, USB_MAX_PAYLOAD_SIZE, 0, &setup_packet_len);
        if (rc != EOK) {
                async_answer_0(callid, rc);
                return;
        }

        if (data_buffer_len > 0) {
                rc = async_data_write_accept(&data_buffer, false,
                    1, USB_MAX_PAYLOAD_SIZE, 0, &data_buffer_len);
                if (rc != EOK) {
                        async_answer_0(callid, rc);
                        free(setup_packet);
                        return;
                }
        }

        async_transaction_t *trans = async_transaction_create(callid);
        if (trans == NULL) {
                async_answer_0(callid, ENOMEM);
                free(setup_packet);
                free(data_buffer);
                return;
        }
        trans->setup_packet = setup_packet;
        trans->buffer = data_buffer;
        trans->size = data_buffer_len;

        rc = usb_iface->control_write(fun, target,
            setup_packet, setup_packet_len,
            data_buffer, data_buffer_len,
            callback_out, trans);

        if (rc != EOK) {
                async_answer_0(callid, rc);
                async_transaction_destroy(trans);
        }
}


void remote_usbhc_control_read(ddf_fun_t *fun, void *iface,
ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;
        assert(usb_iface != NULL);

        if (!usb_iface->control_read) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_target_t target = {
                .address = DEV_IPC_GET_ARG1(*call),
                .endpoint = DEV_IPC_GET_ARG2(*call)
        };

        int rc;

        void *setup_packet = NULL;
        size_t setup_packet_len = 0;
        size_t data_len = 0;

        rc = async_data_write_accept(&setup_packet, false,
            1, USB_MAX_PAYLOAD_SIZE, 0, &setup_packet_len);
        if (rc != EOK) {
                async_answer_0(callid, rc);
                return;
        }

        ipc_callid_t data_callid;
        if (!async_data_read_receive(&data_callid, &data_len)) {
                async_answer_0(callid, EPARTY);
                free(setup_packet);
                return;
        }

        async_transaction_t *trans = async_transaction_create(callid);
        if (trans == NULL) {
                async_answer_0(data_callid, ENOMEM);
                async_answer_0(callid, ENOMEM);
                free(setup_packet);
                return;
        }
        trans->data_caller = data_callid;
        trans->setup_packet = setup_packet;
        trans->size = data_len;
        trans->buffer = malloc(data_len);
        if (trans->buffer == NULL) {
                async_answer_0(data_callid, ENOMEM);
                async_answer_0(callid, ENOMEM);
                async_transaction_destroy(trans);
                return;
        }

        rc = usb_iface->control_read(fun, target,
            setup_packet, setup_packet_len,
            trans->buffer, trans->size,
            callback_in, trans);

        if (rc != EOK) {
                async_answer_0(data_callid, rc);
                async_answer_0(callid, rc);
                async_transaction_destroy(trans);
        }
}


void remote_usbhc_register_endpoint(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

        if (!usb_iface->register_endpoint) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

#define _INIT_FROM_HIGH_DATA2(type, var, arg_no) \
        type var = (type) DEV_IPC_GET_ARG##arg_no(*call) / (1 << 16)
#define _INIT_FROM_LOW_DATA2(type, var, arg_no) \
        type var = (type) DEV_IPC_GET_ARG##arg_no(*call) % (1 << 16)
#define _INIT_FROM_HIGH_DATA3(type, var, arg_no) \
        type var = (type) DEV_IPC_GET_ARG##arg_no(*call) / (1 << 16)
#define _INIT_FROM_MIDDLE_DATA3(type, var, arg_no) \
        type var = (type) (DEV_IPC_GET_ARG##arg_no(*call) / (1 << 8)) % (1 << 8)
#define _INIT_FROM_LOW_DATA3(type, var, arg_no) \
        type var = (type) DEV_IPC_GET_ARG##arg_no(*call) % (1 << 8)

        _INIT_FROM_HIGH_DATA2(usb_address_t, address, 1);
        _INIT_FROM_LOW_DATA2(usb_endpoint_t, endpoint, 1);

        _INIT_FROM_HIGH_DATA3(usb_speed_t, speed, 2);
        _INIT_FROM_MIDDLE_DATA3(usb_transfer_type_t, transfer_type, 2);
        _INIT_FROM_LOW_DATA3(usb_direction_t, direction, 2);

        _INIT_FROM_HIGH_DATA2(size_t, max_packet_size, 3);
        _INIT_FROM_LOW_DATA2(unsigned int, interval, 3);

#undef _INIT_FROM_HIGH_DATA2
#undef _INIT_FROM_LOW_DATA2
#undef _INIT_FROM_HIGH_DATA3
#undef _INIT_FROM_MIDDLE_DATA3
#undef _INIT_FROM_LOW_DATA3

        int rc = usb_iface->register_endpoint(fun, address, speed, endpoint,
            transfer_type, direction, max_packet_size, interval);

        async_answer_0(callid, rc);
}


void remote_usbhc_unregister_endpoint(ddf_fun_t *fun, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

        if (!usb_iface->unregister_endpoint) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

        usb_address_t address = (usb_address_t) DEV_IPC_GET_ARG1(*call);
        usb_endpoint_t endpoint = (usb_endpoint_t) DEV_IPC_GET_ARG2(*call);
        usb_direction_t direction = (usb_direction_t) DEV_IPC_GET_ARG3(*call);

        int rc = usb_iface->unregister_endpoint(fun,
            address, endpoint, direction);

        async_answer_0(callid, rc);
}

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