source: mainline/uspace/lib/drv/generic/remote_usbhc.c@ b6c7da6

/*
 * 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.
 */

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

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

#include "usbhc_iface.h"
#include "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_get_address(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_interrupt_out(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_interrupt_in(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_write_setup(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_write_data(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_write_status(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_read_setup(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_read_data(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_read_status(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_write(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_control_read(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_reserve_default_address(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_release_default_address(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_request_address(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_bind_address(device_t *, void *, ipc_callid_t, ipc_call_t *);
static void remote_usbhc_release_address(device_t *, void *, ipc_callid_t, ipc_call_t *);
//static void remote_usbhc(device_t *, void *, ipc_callid_t, ipc_call_t *);

/** Remote USB host controller interface operations. */
static remote_iface_func_ptr_t remote_usbhc_iface_ops [] = {
        remote_usbhc_get_address,

        remote_usbhc_reserve_default_address,
        remote_usbhc_release_default_address,

        remote_usbhc_request_address,
        remote_usbhc_bind_address,
        remote_usbhc_release_address,

        remote_usbhc_interrupt_out,
        remote_usbhc_interrupt_in,

        remote_usbhc_control_write_setup,
        remote_usbhc_control_write_data,
        remote_usbhc_control_write_status,

        remote_usbhc_control_read_setup,
        remote_usbhc_control_read_data,
        remote_usbhc_control_read_status,

        remote_usbhc_control_write,
        remote_usbhc_control_read
};

/** Remote USB host controller interface structure.
 */
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_get_address(device_t *device, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

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

        devman_handle_t handle = DEV_IPC_GET_ARG1(*call);

        usb_address_t address;
        int rc = usb_iface->tell_address(device, handle, &address);
        if (rc != EOK) {
                async_answer_0(callid, rc);
        } else {
                async_answer_1(callid, EOK, address);
        }
}

void remote_usbhc_reserve_default_address(device_t *device, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

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

        async_answer_0(callid, rc);
}

void remote_usbhc_release_default_address(device_t *device, void *iface,
    ipc_callid_t callid, ipc_call_t *call)
{
        usbhc_iface_t *usb_iface = (usbhc_iface_t *) iface;

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

        int rc = usb_iface->release_default_address(device);

        async_answer_0(callid, rc);
}

void remote_usbhc_request_address(device_t *device, 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(device, speed, &address);
        if (rc != EOK) {
                async_answer_0(callid, rc);
        } else {
                async_answer_1(callid, EOK, (sysarg_t) address);
        }
}

void remote_usbhc_bind_address(device_t *device, 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(device, address, handle);

        async_answer_0(callid, rc);
}

void remote_usbhc_release_address(device_t *device, 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(device, address);

        async_answer_0(callid, rc);
}


static void callback_out(device_t *device,
    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(device_t *device,
    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);
}

/** Process an outgoing transfer (both OUT and SETUP).
 *
 * @param device Target device.
 * @param callid Initiating caller.
 * @param call Initiating call.
 * @param transfer_func Transfer function (might be NULL).
 */
static void remote_usbhc_out_transfer(device_t *device,
    ipc_callid_t callid, ipc_call_t *call,
    usbhc_iface_transfer_out_t transfer_func)
{
        if (!transfer_func) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

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

        size_t len = 0;
        void *buffer = NULL;
        if (expected_len > 0) {
                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;

        int rc = transfer_func(device, target, HACK_MAX_PACKET_SIZE,
            buffer, len,
            callback_out, trans);

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

/** Process an incoming transfer.
 *
 * @param device Target device.
 * @param callid Initiating caller.
 * @param call Initiating call.
 * @param transfer_func Transfer function (might be NULL).
 */
static void remote_usbhc_in_transfer(device_t *device,
    ipc_callid_t callid, ipc_call_t *call,
    usbhc_iface_transfer_in_t transfer_func)
{
        if (!transfer_func) {
                async_answer_0(callid, ENOTSUP);
                return;
        }

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

        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(callid, ENOMEM);
                return;
        }
        trans->data_caller = data_callid;
        trans->buffer = malloc(len);
        trans->size = len;

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

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

/** Process status part of control transfer.
 *
 * @param device Target device.
 * @param callid Initiating caller.
 * @param call Initiating call.
 * @param direction Transfer direction (read ~ in, write ~ out).
 * @param transfer_in_func Transfer function for control read (might be NULL).
 * @param transfer_out_func Transfer function for control write (might be NULL).
 */
static void remote_usbhc_status_transfer(device_t *device,
    ipc_callid_t callid, ipc_call_t *call,
    usb_direction_t direction,
    int (*transfer_in_func)(device_t *, usb_target_t,
        usbhc_iface_transfer_in_callback_t, void *),
    int (*transfer_out_func)(device_t *, usb_target_t,
        usbhc_iface_transfer_out_callback_t, void *))
{
        switch (direction) {
                case USB_DIRECTION_IN:
                        if (!transfer_in_func) {
                                async_answer_0(callid, ENOTSUP);
                                return;
                        }
                        break;
                case USB_DIRECTION_OUT:
                        if (!transfer_out_func) {
                                async_answer_0(callid, ENOTSUP);
                                return;
                        }
                        break;
                default:
                        assert(false && "unreachable code");
                        break;
        }

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

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

        int rc;
        switch (direction) {
                case USB_DIRECTION_IN:
                        rc = transfer_in_func(device, target,
                            callback_in, trans);
                        break;
                case USB_DIRECTION_OUT:
                        rc = transfer_out_func(device, target,
                            callback_out, trans);
                        break;
                default:
                        assert(false && "unreachable code");
                        break;
        }

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


void remote_usbhc_interrupt_out(device_t *device, 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(device, callid, call,
            usb_iface->interrupt_out);
}

void remote_usbhc_interrupt_in(device_t *device, 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(device, callid, call,
            usb_iface->interrupt_in);
}

void remote_usbhc_control_write_setup(device_t *device, 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(device, callid, call,
            usb_iface->control_write_setup);
}

void remote_usbhc_control_write_data(device_t *device, 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(device, callid, call,
            usb_iface->control_write_data);
}

void remote_usbhc_control_write_status(device_t *device, 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_status_transfer(device, callid, call,
            USB_DIRECTION_IN, usb_iface->control_write_status, NULL);
}

void remote_usbhc_control_read_setup(device_t *device, 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(device, callid, call,
            usb_iface->control_read_setup);
}

void remote_usbhc_control_read_data(device_t *device, 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(device, callid, call,
            usb_iface->control_read_data);
}

void remote_usbhc_control_read_status(device_t *device, 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_status_transfer(device, callid, call,
            USB_DIRECTION_OUT, NULL, usb_iface->control_read_status);
}

void remote_usbhc_control_write(device_t *device, 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(device, target, HACK_MAX_PACKET_SIZE,
            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(device_t *device, 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(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(callid, ENOMEM);
                async_transaction_destroy(trans);
                return;
        }

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

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



/**
 * @}
 */