source: mainline/uspace/srv/drivers/pciintel/pci.c@ 8c06905

/*
 * 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 pciintel pci bus driver for intel method 1.
 * @brief HelenOS root pci bus driver for intel method 1.
 * @{
 */

/** @file
 */

#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <bool.h>
#include <fibril_synch.h>
#include <stdlib.h>
#include <string.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>
#include <ddi.h>

#define NAME "pciintel"

static bool pci_add_device(device_t *dev);

/** The pci bus driver's standard operations.
 */
static driver_ops_t pci_ops = {
        .add_device = &pci_add_device
};

/** The pci bus driver structure. 
 */
static driver_t pci_driver = {
        .name = NAME,
        .driver_ops = &pci_ops
};

typedef struct pciintel_bus_data {
        void *conf_io_addr;
        void *conf_data_port;
        void *conf_addr_port;   
} pci_bus_data_t;


static bool pci_add_device(device_t *dev)
{
        printf(NAME ": pci_add_device\n");
        
        pci_bus_data_t *bus_data = (pci_bus_data_t *)malloc(sizeof(pci_bus_data_t));
        if (NULL == bus_data) {
                printf(NAME ": pci_add_device allocation failed.\n");
                return false;
        }       
        
        dev->parent_phone = devman_parent_device_connect(dev->handle,  IPC_FLAG_BLOCKING);
        if (dev->parent_phone <= 0) {
                printf(NAME ": pci_add_device failed to connect to the parent's driver.\n");
                free(bus_data);
                return false;
        }
        
        hw_resource_list_t hw_resources;
        
        if (!get_hw_resources(dev->parent_phone, &hw_resources)) {
                printf(NAME ": pci_add_device failed to get hw resources for the device.\n");
                free(bus_data);
                ipc_hangup(dev->parent_phone);
                return false;           
        }
        
        
        printf(NAME ": conf_addr = %x.\n", hw_resources.resources[0].res.reg.address);  
        
        assert(hw_resources.count > 0);
        assert(hw_resources.resources[0].type == REGISTER);
        assert(hw_resources.resources[0].res.reg.size == 8);
        
        bus_data->conf_io_addr = hw_resources.resources[0].res.reg.address;
        
        if (pio_enable(bus_data->conf_io_addr, 8, &bus_data->conf_addr_port)) {
                printf(NAME ": failed to enable configuration ports.\n");
                free(bus_data);
                ipc_hangup(dev->parent_phone);
                clean_hw_resource_list(&hw_resources);
                return false;                                   
        }
        bus_data->conf_data_port = (char *)bus_data->conf_addr_port + 4;
        
        dev->driver_data = bus_data;
        
        // TODO scan the bus    
        
        clean_hw_resource_list(&hw_resources);
        
        return true;
}

int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS pci bus driver (intel method 1).\n");    
        return driver_main(&pci_driver);
}

/**
 * @}
 */