source: mainline/uspace/drv/uhci-rhd/main.c@ 8d517c3

/*
 * Copyright (c) 2011 Vojtech Horky, 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 drvusbuhcirh
 * @{
 */
/** @file
 * @brief UHCI root hub initialization routines
 */
#include <ddf/driver.h>
#include <devman.h>
#include <device/hw_res.h>
#include <errno.h>
#include <str_error.h>
#include <usb_iface.h>
#include <usb/ddfiface.h>
#include <usb/debug.h>

#include "root_hub.h"

#define NAME "uhci-rhd"

static int hc_get_my_registers(ddf_dev_t *dev,
    uintptr_t *io_reg_address, size_t *io_reg_size);
/*----------------------------------------------------------------------------*/
static int uhci_rh_add_device(ddf_dev_t *device);
/*----------------------------------------------------------------------------*/
static driver_ops_t uhci_rh_driver_ops = {
        .add_device = uhci_rh_add_device,
};
/*----------------------------------------------------------------------------*/
static driver_t uhci_rh_driver = {
        .name = NAME,
        .driver_ops = &uhci_rh_driver_ops
};
/*----------------------------------------------------------------------------*/
/** Initialize global driver structures (NONE).
 *
 * @param[in] argc Nmber of arguments in argv vector (ignored).
 * @param[in] argv Cmdline argument vector (ignored).
 * @return Error code.
 *
 * Driver debug level is set here.
 */
int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS UHCI root hub driver.\n");
        usb_log_enable(USB_LOG_LEVEL_DEFAULT, NAME);
        return ddf_driver_main(&uhci_rh_driver);
}
/*----------------------------------------------------------------------------*/
/** Initialize a new ddf driver instance of UHCI root hub.
 *
 * @param[in] device DDF instance of the device to initialize.
 * @return Error code.
 */
static int uhci_rh_add_device(ddf_dev_t *device)
{
        if (!device)
                return EINVAL;

        usb_log_debug2("%s called device %d\n", __FUNCTION__, device->handle);

        uintptr_t io_regs = 0;
        size_t io_size = 0;
        uhci_root_hub_t *rh = NULL;
        int ret = EOK;

#define CHECK_RET_FREE_RH_RETURN(ret, message...) \
if (ret != EOK) { \
        usb_log_error(message); \
        if (rh) \
                free(rh); \
        return ret; \
} else (void)0

        ret = hc_get_my_registers(device, &io_regs, &io_size);
        CHECK_RET_FREE_RH_RETURN(ret,
            "Failed(%d) to get registers from HC: %s.\n", ret, str_error(ret));
        usb_log_debug("I/O regs at %#x (size %zu).\n", io_regs, io_size);

        rh = malloc(sizeof(uhci_root_hub_t));
        ret = (rh == NULL) ? ENOMEM : EOK;
        CHECK_RET_FREE_RH_RETURN(ret,
            "Failed to allocate rh driver instance.\n");

        ret = uhci_root_hub_init(rh, (void*)io_regs, io_size, device);
        CHECK_RET_FREE_RH_RETURN(ret,
            "Failed(%d) to initialize rh driver instance: %s.\n",
            ret, str_error(ret));

        device->driver_data = rh;
        usb_log_info("Controlling root hub '%s' (%llu).\n",
            device->name, device->handle);
        return EOK;
}
/*----------------------------------------------------------------------------*/
/** Get address of I/O registers.
 *
 * @param[in] dev Device asking for the addresses.
 * @param[out] io_reg_address Base address of the memory range.
 * @param[out] io_reg_size Size of the memory range.
 * @return Error code.
 */
int hc_get_my_registers(
    ddf_dev_t *dev, uintptr_t *io_reg_address, size_t *io_reg_size)
{
        assert(dev != NULL);

        int parent_phone = devman_parent_device_connect(dev->handle,
            IPC_FLAG_BLOCKING);
        if (parent_phone < 0) {
                return parent_phone;
        }

        hw_resource_list_t hw_resources;
        int ret = hw_res_get_resource_list(parent_phone, &hw_resources);
        if (ret != EOK) {
                async_hangup(parent_phone);
                return ret;
        }

        uintptr_t io_address = 0;
        size_t io_size = 0;
        bool io_found = false;

        size_t i = 0;
        for (; i < hw_resources.count; i++) {
                hw_resource_t *res = &hw_resources.resources[i];
                if (res->type == IO_RANGE) {
                        io_address = res->res.io_range.address;
                        io_size = res->res.io_range.size;
                        io_found = true;
                }
        }
        async_hangup(parent_phone);

        if (!io_found) {
                return ENOENT;
        }
        if (io_reg_address != NULL) {
                *io_reg_address = io_address;
        }
        if (io_reg_size != NULL) {
                *io_reg_size = io_size;
        }
        return EOK;
}
/**
 * @}
 */