source: mainline/uspace/drv/rootpc/rootpc.c@ 5f0123b

/*
 * Copyright (c) 2010 Lenka Trochtova
 * 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.
 */

/**
 * @defgroup root_pc PC platform driver.
 * @brief HelenOS PC platform driver.
 * @{
 */

/** @file
 */

#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <bool.h>
#include <fibril_synch.h>
#include <stdlib.h>
#include <str.h>
#include <ctype.h>
#include <macros.h>

#include <driver.h>
#include <devman.h>
#include <ipc/devman.h>
#include <ipc/dev_iface.h>
#include <resource.h>
#include <device/hw_res.h>

#define NAME "rootpc"

typedef struct rootpc_child_dev_data {
        hw_resource_list_t hw_resources;
} rootpc_child_dev_data_t;

static int rootpc_add_device(device_t *dev);
static void root_pc_init(void);

/** The root device driver's standard operations. */
static driver_ops_t rootpc_ops = {
        .add_device = &rootpc_add_device
};

/** The root device driver structure. */
static driver_t rootpc_driver = {
        .name = NAME,
        .driver_ops = &rootpc_ops
};

static hw_resource_t pci_conf_regs = {
        .type = IO_RANGE,
        .res.io_range = {
                .address = 0xCF8,
                .size = 8,
                .endianness = LITTLE_ENDIAN
        }
};

static rootpc_child_dev_data_t pci_data = {
        .hw_resources = {
                1,
                &pci_conf_regs
        }
};

static hw_resource_list_t *rootpc_get_child_resources(device_t *dev)
{
        rootpc_child_dev_data_t *data;
        
        data = (rootpc_child_dev_data_t *) dev->driver_data;
        if (NULL == data)
                return NULL;
        
        return &data->hw_resources;
}

static bool rootpc_enable_child_interrupt(device_t *dev)
{
        /* TODO */
        
        return false;
}

static resource_iface_t child_res_iface = {
        &rootpc_get_child_resources,
        &rootpc_enable_child_interrupt
};

/* Initialized in root_pc_init() function. */
static device_ops_t rootpc_child_ops;

static bool
rootpc_add_child(device_t *parent, const char *name, const char *str_match_id,
    rootpc_child_dev_data_t *drv_data)
{
        printf(NAME ": adding new child device '%s'.\n", name);
        
        device_t *child = NULL;
        match_id_t *match_id = NULL;
        
        /* Create new device. */
        child = create_device();
        if (NULL == child)
                goto failure;
        
        child->name = name;
        child->driver_data = drv_data;
        
        /* Initialize match id list */
        match_id = create_match_id();
        if (NULL == match_id)
                goto failure;
        
        match_id->id = str_match_id;
        match_id->score = 100;
        add_match_id(&child->match_ids, match_id);
        
        /* Set provided operations to the device. */
        child->ops = &rootpc_child_ops;
        
        /* Register child device. */
        if (EOK != child_device_register(child, parent))
                goto failure;
        
        return true;
        
failure:
        if (NULL != match_id)
                match_id->id = NULL;
        
        if (NULL != child) {
                child->name = NULL;
                delete_device(child);
        }
        
        printf(NAME ": failed to add child device '%s'.\n", name);
        
        return false;
}

static bool rootpc_add_children(device_t *dev)
{
        return rootpc_add_child(dev, "pci0", "intel_pci", &pci_data);
}

/** Get the root device.
 *
 * @param dev           The device which is root of the whole device tree (both
 *                      of HW and pseudo devices).
 * @return              Zero on success, negative error number otherwise.
 */
static int rootpc_add_device(device_t *dev)
{
        printf(NAME ": rootpc_add_device, device handle = %d\n",
            (int)dev->handle);
        
        /* Register child devices. */
        if (!rootpc_add_children(dev)) {
                printf(NAME ": failed to add child devices for PC platform.\n");
        }
        
        return EOK;
}

static void root_pc_init(void)
{
        rootpc_child_ops.interfaces[HW_RES_DEV_IFACE] = &child_res_iface;
}

int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS PC platform driver\n");
        root_pc_init();
        return driver_main(&rootpc_driver);
}

/**
 * @}
 */