source: mainline/uspace/lib/drv/generic/remote_hw_res.c@ 8f1dd3b

/*
 * Copyright (c) 2010 Lenka Trochtova
 * 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 "ops/hw_res.h"
#include "ddf/driver.h"

static void remote_hw_res_get_resource_list(ddf_fun_t *, void *, ipc_callid_t,
    ipc_call_t *);
static void remote_hw_res_enable_interrupt(ddf_fun_t *, void *, ipc_callid_t,
    ipc_call_t *);
static void remote_hw_res_dma_channel_setup(ddf_fun_t *, void *, ipc_callid_t,
    ipc_call_t *);
static void remote_hw_res_dma_channel_remain(ddf_fun_t *, void *, ipc_callid_t,
    ipc_call_t *);

static remote_iface_func_ptr_t remote_hw_res_iface_ops [] = {
        [HW_RES_GET_RESOURCE_LIST] = &remote_hw_res_get_resource_list,
        [HW_RES_ENABLE_INTERRUPT] = &remote_hw_res_enable_interrupt,
        [HW_RES_DMA_CHANNEL_SETUP] = &remote_hw_res_dma_channel_setup,
        [HW_RES_DMA_CHANNEL_REMAIN] = &remote_hw_res_dma_channel_remain,
};

remote_iface_t remote_hw_res_iface = {
        .method_count = sizeof(remote_hw_res_iface_ops) /
            sizeof(remote_iface_func_ptr_t),
        .methods = remote_hw_res_iface_ops
};

static void remote_hw_res_enable_interrupt(ddf_fun_t *fun, void *ops,
    ipc_callid_t callid, ipc_call_t *call)
{
        hw_res_ops_t *hw_res_ops = (hw_res_ops_t *) ops;
        
        if (hw_res_ops->enable_interrupt == NULL)
                async_answer_0(callid, ENOTSUP);
        else if (hw_res_ops->enable_interrupt(fun))
                async_answer_0(callid, EOK);
        else
                async_answer_0(callid, EREFUSED);
}

static void remote_hw_res_get_resource_list(ddf_fun_t *fun, void *ops,
    ipc_callid_t callid, ipc_call_t *call)
{
        hw_res_ops_t *hw_res_ops = (hw_res_ops_t *) ops;

        if (hw_res_ops->get_resource_list == NULL) {
                async_answer_0(callid, ENOTSUP);
                return;
        }
        
        hw_resource_list_t *hw_resources = hw_res_ops->get_resource_list(fun);
        if (hw_resources == NULL){
                async_answer_0(callid, ENOENT);
                return;
        }
        
        async_answer_1(callid, EOK, hw_resources->count);

        size_t len;
        if (!async_data_read_receive(&callid, &len)) {
                /* Protocol error - the recipient is not accepting data */
                return;
        }
        async_data_read_finalize(callid, hw_resources->resources, len);
}

static void remote_hw_res_dma_channel_setup(ddf_fun_t *fun, void *ops,
    ipc_callid_t callid, ipc_call_t *call)
{
        hw_res_ops_t *hw_res_ops = ops;

        if (hw_res_ops->dma_channel_setup == NULL) {
                async_answer_0(callid, ENOTSUP);
                return;
        }
        const unsigned channel = DEV_IPC_GET_ARG1(*call) & 0xffff;
        const uint8_t  mode = DEV_IPC_GET_ARG1(*call) >> 16;
        const uint32_t address = DEV_IPC_GET_ARG2(*call);
        const uint32_t size = DEV_IPC_GET_ARG3(*call);

        const int ret = hw_res_ops->dma_channel_setup(
            fun, channel, address, size, mode);
        async_answer_0(callid, ret);
}

static void remote_hw_res_dma_channel_remain(ddf_fun_t *fun, void *ops,
    ipc_callid_t callid, ipc_call_t *call)
{
        hw_res_ops_t *hw_res_ops = ops;

        if (hw_res_ops->dma_channel_setup == NULL) {
                async_answer_0(callid, ENOTSUP);
                return;
        }
        const unsigned channel = DEV_IPC_GET_ARG1(*call);
        size_t remain = 0;
        const int ret = hw_res_ops->dma_channel_remain(fun, channel, &remain);
        async_answer_1(callid, ret, remain);
}
/**
 * @}
 */