source: mainline/uspace/drv/rootia32/rootia32.c@ a79d88d

/*
 * 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_ia32 Root HW device driver for ia32 platform.
 * @brief HelenOS root HW device driver for ia32 platform.
 * @{
 */

/** @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 "rootia32"

typedef struct rootia32_child_dev_data {
        hw_resource_list_t hw_resources;        
} rootia32_child_dev_data_t;

static int rootia32_add_device(device_t *dev);
static void root_ia32_init(void);

/** The root device driver's standard operations.
 */
static driver_ops_t rootia32_ops = {
        .add_device = &rootia32_add_device
};

/** The root device driver structure. 
 */
static driver_t rootia32_driver = {
        .name = NAME,
        .driver_ops = &rootia32_ops
};

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

static rootia32_child_dev_data_t pci_data = {
        .hw_resources = {
                1, 
                &pci_conf_regs
        }
};

static hw_resource_list_t * rootia32_get_child_resources(device_t *dev)
{
        rootia32_child_dev_data_t *data = (rootia32_child_dev_data_t *)dev->driver_data;
        if (NULL == data) {
                return NULL;
        }
        return &data->hw_resources;
}

static bool rootia32_enable_child_interrupt(device_t *dev) 
{
        // TODO
        
        return false;
}

static resource_iface_t child_res_iface = {
        &rootia32_get_child_resources,
        &rootia32_enable_child_interrupt        
};

// initialized in root_ia32_init() function
static device_ops_t rootia32_child_ops;

static bool rootia32_add_child(
        device_t *parent, const char *name, const char *str_match_id, 
        rootia32_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
        if (NULL == (child = create_device())) {
                goto failure;
        }
        
        child->name = name;
        child->driver_data = drv_data;
        
        // initialize match id list
        if (NULL == (match_id = create_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 = &rootia32_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 rootia32_add_children(device_t *dev) 
{
        return rootia32_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 0 on success, negative error number otherwise.
 */
static int rootia32_add_device(device_t *dev) 
{
        printf(NAME ": rootia32_add_device, device handle = %d\n", dev->handle);
        
        // register child devices       
        if (!rootia32_add_children(dev)) {
                printf(NAME ": failed to add child devices for platform ia32.\n");
        }
        
        return EOK;
}

static void root_ia32_init() {
        rootia32_child_ops.interfaces[HW_RES_DEV_IFACE] = &child_res_iface;
}

int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS rootia32 device driver\n");      
        root_ia32_init();
        return driver_main(&rootia32_driver);
}

/**
 * @}
 */