source: mainline/uspace/drv/rootpc/rootpc.c@ 68414f4a

/*
 * 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 <ops/hw_res.h>
#include <device/hw_res.h>

#define NAME "rootpc"

/** Obtain function soft-state from DDF function node */
#define ROOTPC_FUN(fnode) ((rootpc_fun_t *) (fnode)->driver_data)

typedef struct rootpc_fun {
        hw_resource_list_t hw_resources;
} rootpc_fun_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_fun_t pci_data = {
        .hw_resources = {
                1,
                &pci_conf_regs
        }
};

static hw_resource_list_t *rootpc_get_resources(function_t *fnode)
{
        rootpc_fun_t *fun = ROOTPC_FUN(fnode);
        
        assert(fun != NULL);
        return &fun->hw_resources;
}

static bool rootpc_enable_interrupt(function_t *fun)
{
        /* TODO */
        
        return false;
}

static hw_res_ops_t fun_hw_res_ops = {
        &rootpc_get_resources,
        &rootpc_enable_interrupt
};

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

static bool
rootpc_add_fun(device_t *dev, const char *name, const char *str_match_id,
    rootpc_fun_t *fun)
{
        printf(NAME ": adding new function '%s'.\n", name);
        
        function_t *fnode = NULL;
        match_id_t *match_id = NULL;
        
        /* Create new device. */
        fnode = create_function();
        if (fnode == NULL)
                goto failure;
        
        fnode->name = name;
        fnode->driver_data = fun;
        fnode->ftype = fun_inner;
        
        /* Initialize match id list */
        match_id = create_match_id();
        if (match_id == NULL)
                goto failure;
        
        match_id->id = str_match_id;
        match_id->score = 100;
        add_match_id(&fnode->match_ids, match_id);
        
        /* Set provided operations to the device. */
        fnode->ops = &rootpc_fun_ops;
        
        /* Register function. */
        if (register_function(fnode, dev) != EOK)
                goto failure;
        printf(NAME ": registered function handle = %u\n", fnode->handle);
        
        return true;
        
failure:
        if (match_id != NULL)
                match_id->id = NULL;
        
        if (fnode != NULL) {
                fnode->name = NULL;
                delete_function(fnode);
        }
        
        printf(NAME ": failed to add function '%s'.\n", name);
        
        return false;
}

static bool rootpc_add_functions(device_t *dev)
{
        return rootpc_add_fun(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 functions. */
        if (!rootpc_add_functions(dev)) {
                printf(NAME ": failed to add functions for PC platform.\n");
        }
        
        return EOK;
}

static void root_pc_init(void)
{
        rootpc_fun_ops.interfaces[HW_RES_DEV_IFACE] = &fun_hw_res_ops;
}

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

/**
 * @}
 */