source: mainline/uspace/srv/hid/input/port/adb.c@ a8bf1ea

/*
 * Copyright (c) 2011 Jiri Svoboda
 * 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 kbd_port
 * @ingroup kbd
 * @{
 */
/** @file
 * @brief ADB keyboard port driver.
 */

#include <ipc/adb.h>
#include <async.h>
#include <input.h>
#include <kbd_port.h>
#include <kbd.h>
#include <vfs/vfs.h>
#include <fcntl.h>
#include <errno.h>
#include <loc.h>

static void kbd_port_events(ipc_callid_t iid, ipc_call_t *icall, void *arg);
static void adb_kbd_reg0_data(uint16_t data);

static int adb_port_init(kbd_dev_t *);
static void adb_port_yield(void);
static void adb_port_reclaim(void);
static void adb_port_write(uint8_t data);

kbd_port_ops_t adb_port = {
        .init = adb_port_init,
        .yield = adb_port_yield,
        .reclaim = adb_port_reclaim,
        .write = adb_port_write
};

static kbd_dev_t *kbd_dev;
static async_sess_t *dev_sess;

static int adb_port_init(kbd_dev_t *kdev)
{
        const char *dev = "adb/kbd";
        service_id_t service_id;
        async_exch_t *exch;
        int rc;
        
        kbd_dev = kdev;
        
        rc = loc_service_get_id(dev, &service_id, 0);
        if (rc != EOK)
                return rc;
        
        dev_sess = loc_service_connect(EXCHANGE_ATOMIC, service_id, 0);
        if (dev_sess == NULL) {
                printf("%s: Failed to connect to device\n", NAME);
                return ENOENT;
        }
        
        exch = async_exchange_begin(dev_sess);
        if (exch == NULL) {
                printf("%s: Failed starting exchange with device\n", NAME);
                async_hangup(dev_sess);
                return ENOMEM;
        }
        
        /* NB: The callback connection is slotted for removal */
        rc = async_connect_to_me(exch, 0, 0, 0, kbd_port_events, NULL);
        async_exchange_end(exch);
        if (rc != EOK) {
                printf("%s: Failed to create callback from device\n", NAME);
                async_hangup(dev_sess);
                return rc;
        }
        
        return EOK;
}

static void adb_port_yield(void)
{
}

static void adb_port_reclaim(void)
{
}

static void adb_port_write(uint8_t data)
{
        /*async_msg_1(dev_phone, CHAR_WRITE_BYTE, data);*/
}

static void kbd_port_events(ipc_callid_t iid, ipc_call_t *icall, void *arg)
{
        /* Ignore parameters, the connection is already opened */
        while (true) {

                ipc_call_t call;
                ipc_callid_t callid = async_get_call(&call);

                int retval;
                
                if (!IPC_GET_IMETHOD(call)) {
                        /* TODO: Handle hangup */
                        return;
                }
                
                switch (IPC_GET_IMETHOD(call)) {
                case ADB_REG_NOTIF:
                        adb_kbd_reg0_data(IPC_GET_ARG1(call));
                        break;
                default:
                        retval = ENOENT;
                }
                async_answer_0(callid, retval);
        }
}

static void adb_kbd_reg0_data(uint16_t data)
{
        uint8_t b0 = (data >> 8) & 0xff;
        uint8_t b1 = data & 0xff;
        
        if (b0 != 0xff)
                kbd_push_data(kbd_dev, b0);
        
        if (b1 != 0xff)
                kbd_push_data(kbd_dev, b1);
}

/**
 * @}
 */