source: mainline/uspace/drv/char/i8042/main.c@ 19e00de4

/*
 * Copyright (c) 2011 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 drvi8042
 * @{
 */
/** @file
 * @brief i8042 driver DDF bits.
 */

#include <libarch/inttypes.h>
#include <ddf/driver.h>
#include <devman.h>
#include <device/hw_res_parsed.h>
#include <errno.h>
#include <str_error.h>
#include <ddf/log.h>
#include <stdio.h>

#include "i8042.h"

#define NAME "i8042"

static int get_my_registers(const ddf_dev_t *dev,
    uintptr_t *io_reg_address, size_t *io_reg_size, int *kbd, int *mouse);

static int i8042_dev_add(ddf_dev_t *device);

static driver_ops_t i8042_driver_ops = {
        .dev_add = i8042_dev_add,
};

static driver_t i8042_driver = {
        .name = NAME,
        .driver_ops = &i8042_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 ps/2 driver.\n");
        ddf_log_init(NAME, LVL_DEBUG2);
        return ddf_driver_main(&i8042_driver);
}

/** Initialize a new ddf driver instance of i8042 driver
 *
 * @param[in] device DDF instance of the device to initialize.
 * @return Error code.
 */
static int i8042_dev_add(ddf_dev_t *device)
{
        if (!device)
                return EINVAL;

#define CHECK_RET_RETURN(ret, message...) \
if (ret != EOK) { \
        ddf_msg(LVL_ERROR, message); \
        return ret; \
} else (void)0

        uintptr_t io_regs = 0;
        size_t io_size = 0;
        int kbd = 0, mouse = 0;

        int ret = get_my_registers(device, &io_regs, &io_size, &kbd, &mouse);
        CHECK_RET_RETURN(ret,
            "Failed to get registers: %s.\n", str_error(ret));
        ddf_msg(LVL_DEBUG,
            "I/O regs at %p (size %zuB), IRQ kbd %d, IRQ mouse %d.\n",
            (void *) io_regs, io_size, kbd, mouse);

        i8042_t *i8042 = ddf_dev_data_alloc(device, sizeof(i8042_t));
        ret = (i8042 == NULL) ? ENOMEM : EOK;
        CHECK_RET_RETURN(ret, "Failed to allocate i8042 driver instance.\n");

        ret = i8042_init(i8042, (void*)io_regs, io_size, kbd, mouse, device);
        CHECK_RET_RETURN(ret,
            "Failed to initialize i8042 driver: %s.\n", str_error(ret));

        ddf_msg(LVL_NOTE, "Controlling '%s' (%" PRIun ").\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 get_my_registers(const ddf_dev_t *dev, uintptr_t *io_reg_address,
    size_t *io_reg_size, int *kbd_irq, int *mouse_irq)
{
        assert(dev);

        async_sess_t *parent_sess =
            devman_parent_device_connect(EXCHANGE_SERIALIZE, dev->handle,
            IPC_FLAG_BLOCKING);
        if (!parent_sess)
                return ENOMEM;

        hw_res_list_parsed_t hw_resources;
        hw_res_list_parsed_init(&hw_resources);
        const int ret = hw_res_get_list_parsed(parent_sess, &hw_resources, 0);
        async_hangup(parent_sess);
        if (ret != EOK) {
                return ret;
        }

        if (hw_resources.irqs.count != 2 || hw_resources.io_ranges.count != 1) {
                hw_res_list_parsed_clean(&hw_resources);
                return EINVAL;
        }

        if (io_reg_address)
                *io_reg_address = hw_resources.io_ranges.ranges[0].address;

        if (io_reg_size)
                *io_reg_size = hw_resources.io_ranges.ranges[0].size;

        if (kbd_irq)
                *kbd_irq = hw_resources.irqs.irqs[0];

        if (mouse_irq)
                *mouse_irq = hw_resources.irqs.irqs[1];

        hw_res_list_parsed_clean(&hw_resources);
        return EOK;
}
/**
 * @}
 */