source: mainline/uspace/srv/hid/input/generic/input.c@ c0699467

/*
 * Copyright (c) 2006 Josef Cejka
 * 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 inputgen generic
 * @brief HelenOS input server.
 * @ingroup input
 * @{
 */
/** @file
 */

#include <adt/list.h>
#include <ipc/services.h>
#include <ipc/input.h>
#include <sysinfo.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ns.h>
#include <ns_obsolete.h>
#include <async.h>
#include <async_obsolete.h>
#include <errno.h>
#include <adt/fifo.h>
#include <io/console.h>
#include <io/keycode.h>
#include <devmap.h>
#include <input.h>
#include <kbd.h>
#include <kbd_port.h>
#include <kbd_ctl.h>
#include <mouse_proto.h>
#include <layout.h>
#include <mouse.h>

// FIXME: remove this header
#include <abi/ipc/methods.h>

/* In microseconds */
#define DISCOVERY_POLL_INTERVAL  (10 * 1000 * 1000)

#define NUM_LAYOUTS  3

static layout_ops_t *layout[NUM_LAYOUTS] = {
        &us_qwerty_ops,
        &us_dvorak_ops,
        &cz_ops
};

static void kbd_devs_yield(void);
static void kbd_devs_reclaim(void);

int client_phone = -1;

/** List of keyboard devices */
static list_t kbd_devs;

/** List of mouse devices */
static list_t mouse_devs;

bool irc_service = false;
int irc_phone = -1;

void kbd_push_data(kbd_dev_t *kdev, sysarg_t data)
{
        (*kdev->ctl_ops->parse)(data);
}

void mouse_push_data(mouse_dev_t *mdev, sysarg_t data)
{
        (*mdev->proto_ops->parse)(data);
}

void kbd_push_event(kbd_dev_t *kdev, int type, unsigned int key)
{
        kbd_event_t ev;
        unsigned int mod_mask;
        
        switch (key) {
        case KC_LCTRL: mod_mask = KM_LCTRL; break;
        case KC_RCTRL: mod_mask = KM_RCTRL; break;
        case KC_LSHIFT: mod_mask = KM_LSHIFT; break;
        case KC_RSHIFT: mod_mask = KM_RSHIFT; break;
        case KC_LALT: mod_mask = KM_LALT; break;
        case KC_RALT: mod_mask = KM_RALT; break;
        default: mod_mask = 0; break;
        }
        
        if (mod_mask != 0) {
                if (type == KEY_PRESS)
                        kdev->mods = kdev->mods | mod_mask;
                else
                        kdev->mods = kdev->mods & ~mod_mask;
        }
        
        switch (key) {
        case KC_CAPS_LOCK: mod_mask = KM_CAPS_LOCK; break;
        case KC_NUM_LOCK: mod_mask = KM_NUM_LOCK; break;
        case KC_SCROLL_LOCK: mod_mask = KM_SCROLL_LOCK; break;
        default: mod_mask = 0; break;
        }
        
        if (mod_mask != 0) {
                if (type == KEY_PRESS) {
                        /*
                         * Only change lock state on transition from released
                         * to pressed. This prevents autorepeat from messing
                         * up the lock state.
                         */
                        kdev->mods = kdev->mods ^ (mod_mask & ~kdev->lock_keys);
                        kdev->lock_keys = kdev->lock_keys | mod_mask;
                        
                        /* Update keyboard lock indicator lights. */
                        (*kdev->ctl_ops->set_ind)(kdev, kdev->mods);
                } else {
                        kdev->lock_keys = kdev->lock_keys & ~mod_mask;
                }
        }
        
        if (type == KEY_PRESS && (kdev->mods & KM_LCTRL) &&
            key == KC_F1) {
                layout_destroy(kdev->active_layout);
                kdev->active_layout = layout_create(layout[0]);
                return;
        }
        
        if (type == KEY_PRESS && (kdev->mods & KM_LCTRL) &&
            key == KC_F2) {
                layout_destroy(kdev->active_layout);
                kdev->active_layout = layout_create(layout[1]);
                return;
        }
        
        if (type == KEY_PRESS && (kdev->mods & KM_LCTRL) &&
            key == KC_F3) {
                layout_destroy(kdev->active_layout);
                kdev->active_layout = layout_create(layout[2]);
                return;
        }
        
        ev.type = type;
        ev.key = key;
        ev.mods = kdev->mods;
        
        ev.c = layout_parse_ev(kdev->active_layout, &ev);
        async_obsolete_msg_4(client_phone, INPUT_EVENT_KEY, ev.type, ev.key,
            ev.mods, ev.c);
}

/** Mouse pointer has moved. */
void mouse_push_event_move(mouse_dev_t *mdev, int dx, int dy)
{
        async_obsolete_msg_2(client_phone, INPUT_EVENT_MOVE, dx, dy);
}

/** Mouse button has been pressed. */
void mouse_push_event_button(mouse_dev_t *mdev, int bnum, int press)
{
        async_obsolete_msg_2(client_phone, INPUT_EVENT_BUTTON, bnum, press);
}

static void client_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
{
        ipc_callid_t callid;
        ipc_call_t call;
        int retval;
        
        async_answer_0(iid, EOK);
        
        while (true) {
                callid = async_get_call(&call);
                
                if (!IPC_GET_IMETHOD(call)) {
                        if (client_phone != -1) {
                                async_obsolete_hangup(client_phone);
                                client_phone = -1;
                        }
                        
                        async_answer_0(callid, EOK);
                        return;
                }
                
                switch (IPC_GET_IMETHOD(call)) {
                case IPC_M_CONNECT_TO_ME:
                        if (client_phone != -1) {
                                retval = ELIMIT;
                                break;
                        }
                        client_phone = IPC_GET_ARG5(call);
                        retval = 0;
                        break;
                case INPUT_YIELD:
                        kbd_devs_yield();
                        retval = 0;
                        break;
                case INPUT_RECLAIM:
                        kbd_devs_reclaim();
                        retval = 0;
                        break;
                default:
                        retval = EINVAL;
                }
                
                async_answer_0(callid, retval);
        }
}

static kbd_dev_t *kbd_dev_new(void)
{
        kbd_dev_t *kdev = calloc(1, sizeof(kbd_dev_t));
        if (kdev == NULL) {
                printf("%s: Error allocating keyboard device. "
                    "Out of memory.\n", NAME);
                return NULL;
        }
        
        link_initialize(&kdev->kbd_devs);
        
        kdev->mods = KM_NUM_LOCK;
        kdev->lock_keys = 0;
        kdev->active_layout = layout_create(layout[0]);
        
        return kdev;
}

static mouse_dev_t *mouse_dev_new(void)
{
        mouse_dev_t *mdev = calloc(1, sizeof(mouse_dev_t));
        if (mdev == NULL) {
                printf("%s: Error allocating keyboard device. "
                    "Out of memory.\n", NAME);
                return NULL;
        }
        
        link_initialize(&mdev->mouse_devs);
        
        return mdev;
}

/** Add new legacy keyboard device. */
static void kbd_add_dev(kbd_port_ops_t *port, kbd_ctl_ops_t *ctl)
{
        kbd_dev_t *kdev = kbd_dev_new();
        if (kdev == NULL)
                return;
        
        kdev->port_ops = port;
        kdev->ctl_ops = ctl;
        kdev->dev_path = NULL;
        
        /* Initialize port driver. */
        if ((*kdev->port_ops->init)(kdev) != 0)
                goto fail;
        
        /* Initialize controller driver. */
        if ((*kdev->ctl_ops->init)(kdev) != 0) {
                /* XXX Uninit port */
                goto fail;
        }
        
        list_append(&kdev->kbd_devs, &kbd_devs);
        return;
        
fail:
        free(kdev);
}

/** Add new legacy mouse device. */
static void mouse_add_dev(mouse_port_ops_t *port, mouse_proto_ops_t *proto)
{
        mouse_dev_t *mdev = mouse_dev_new();
        if (mdev == NULL)
                return;
        
        mdev->port_ops = port;
        mdev->proto_ops = proto;
        mdev->dev_path = NULL;
        
        /* Initialize port driver. */
        if ((*mdev->port_ops->init)(mdev) != 0)
                goto fail;
        
        /* Initialize protocol driver. */
        if ((*mdev->proto_ops->init)(mdev) != 0) {
                /* XXX Uninit port */
                goto fail;
        }
        
        list_append(&mdev->mouse_devs, &mouse_devs);
        return;
        
fail:
        free(mdev);
}

/** Add new kbdev device.
 *
 * @param dev_path Filesystem path to the device (/dev/class/...)
 *
 */
static int kbd_add_kbdev(const char *dev_path)
{
        kbd_dev_t *kdev = kbd_dev_new();
        if (kdev == NULL)
                return -1;
        
        kdev->dev_path = dev_path;
        kdev->port_ops = NULL;
        kdev->ctl_ops = &kbdev_ctl;
        
        /* Initialize controller driver. */
        if ((*kdev->ctl_ops->init)(kdev) != 0) {
                goto fail;
        }
        
        list_append(&kdev->kbd_devs, &kbd_devs);
        return EOK;
        
fail:
        free(kdev);
        return -1;
}

/** Add new mousedev device.
 *
 * @param dev_path Filesystem path to the device (/dev/class/...)
 *
 */
static int mouse_add_mousedev(const char *dev_path)
{
        mouse_dev_t *mdev = mouse_dev_new();
        if (mdev == NULL)
                return -1;
        
        mdev->dev_path = dev_path;
        mdev->port_ops = NULL;
        mdev->proto_ops = &mousedev_proto;
        
        /* Initialize controller driver. */
        if ((*mdev->proto_ops->init)(mdev) != 0) {
                goto fail;
        }
        
        list_append(&mdev->mouse_devs, &mouse_devs);
        return EOK;
        
fail:
        free(mdev);
        return -1;
}

/** Add legacy drivers/devices. */
static void kbd_add_legacy_devs(void)
{
        /*
         * Need to add these drivers based on config unless we can probe
         * them automatically.
         */
#if defined(UARCH_amd64)
        kbd_add_dev(&chardev_port, &pc_ctl);
#endif
#if defined(UARCH_arm32) && defined(MACHINE_gta02)
        kbd_add_dev(&chardev_port, &stty_ctl);
#endif
#if defined(UARCH_arm32) && defined(MACHINE_testarm) && defined(CONFIG_FB)
        kbd_add_dev(&gxemul_port, &gxe_fb_ctl);
#endif
#if defined(UARCH_arm32) && defined(MACHINE_testarm) && !defined(CONFIG_FB)
        kbd_add_dev(&gxemul_port, &stty_ctl);
#endif
#if defined(UARCH_arm32) && defined(MACHINE_integratorcp)
        kbd_add_dev(&pl050_port, &pc_ctl);
#endif
#if defined(UARCH_ia32)
        kbd_add_dev(&chardev_port, &pc_ctl);
#endif
#if defined(MACHINE_i460GX)
        kbd_add_dev(&chardev_port, &pc_ctl);
#endif
#if defined(MACHINE_ski)
        kbd_add_dev(&ski_port, &stty_ctl);
#endif
#if defined(MACHINE_msim)
        kbd_add_dev(&msim_port, &stty_ctl);
#endif
#if (defined(MACHINE_lgxemul) || defined(MACHINE_bgxemul)) && defined(CONFIG_FB)
        kbd_add_dev(&gxemul_port, &gxe_fb_ctl);
#endif
#if defined(MACHINE_lgxemul) || defined(MACHINE_bgxemul) && !defined(CONFIG_FB)
        kbd_add_dev(&gxemul_port, &stty_ctl);
#endif
#if defined(UARCH_ppc32)
        kbd_add_dev(&adb_port, &apple_ctl);
#endif
#if defined(UARCH_sparc64) && defined(PROCESSOR_sun4v)
        kbd_add_dev(&niagara_port, &stty_ctl);
#endif
#if defined(UARCH_sparc64) && defined(MACHINE_generic)
        kbd_add_dev(&ns16550_port, &sun_ctl);
#endif
        /* Silence warning on abs32le about kbd_add_dev() being unused */
        (void) kbd_add_dev;
}

/** Add legacy drivers/devices. */
static void mouse_add_legacy_devs(void)
{
        /*
         * Need to add these drivers based on config unless we can probe
         * them automatically.
         */
#if defined(UARCH_amd64)
        mouse_add_dev(&chardev_mouse_port, &ps2_proto);
#endif
#if defined(UARCH_ia32)
        mouse_add_dev(&chardev_mouse_port, &ps2_proto);
#endif
#if defined(MACHINE_i460GX)
        mouse_add_dev(&chardev_mouse_port, &ps2_proto);
#endif
#if defined(UARCH_ppc32)
        mouse_add_dev(&adb_mouse_port, &adb_proto);
#endif
        /* Silence warning on abs32le about mouse_add_dev() being unused */
        (void) mouse_add_dev;
}

static void kbd_devs_yield(void)
{
        /* For each keyboard device */
        list_foreach(kbd_devs, kdev_link) {
                kbd_dev_t *kdev = list_get_instance(kdev_link, kbd_dev_t,
                    kbd_devs);
                
                /* Yield port */
                if (kdev->port_ops != NULL)
                        (*kdev->port_ops->yield)();
        }
}

static void kbd_devs_reclaim(void)
{
        /* For each keyboard device */
        list_foreach(kbd_devs, kdev_link) {
                kbd_dev_t *kdev = list_get_instance(kdev_link, kbd_dev_t,
                    kbd_devs);
                
                /* Reclaim port */
                if (kdev->port_ops != NULL)
                        (*kdev->port_ops->reclaim)();
        }
}

/** Periodically check for new input devices.
 *
 * Looks under /dev/class/keyboard and /dev/class/mouse.
 *
 * @param arg Ignored
 *
 */
static int dev_discovery_fibril(void *arg)
{
        char *dev_path;
        size_t kbd_id = 1;
        size_t mouse_id = 1;
        int rc;
        
        while (true) {
                async_usleep(DISCOVERY_POLL_INTERVAL);
                
                /*
                 * Check for new keyboard device
                 */
                rc = asprintf(&dev_path, "/dev/class/keyboard\\%zu", kbd_id);
                if (rc < 0)
                        continue;
                
                if (kbd_add_kbdev(dev_path) == EOK) {
                        printf("%s: Connected keyboard device '%s'\n",
                            NAME, dev_path);
                        
                        /* XXX Handle device removal */
                        ++kbd_id;
                }
                
                free(dev_path);
                
                /*
                 * Check for new mouse device
                 */
                rc = asprintf(&dev_path, "/dev/class/mouse\\%zu", mouse_id);
                if (rc < 0)
                        continue;
                
                if (mouse_add_mousedev(dev_path) == EOK) {
                        printf("%s: Connected mouse device '%s'\n",
                            NAME, dev_path);
                        
                        /* XXX Handle device removal */
                        ++mouse_id;
                }
                
                free(dev_path);
        }
        
        return EOK;
}

/** Start a fibril for discovering new devices. */
static void input_start_dev_discovery(void)
{
        fid_t fid = fibril_create(dev_discovery_fibril, NULL);
        if (!fid) {
                printf("%s: Failed to create device discovery fibril.\n",
                    NAME);
                return;
        }
        
        fibril_add_ready(fid);
}

int main(int argc, char **argv)
{
        printf("%s: HelenOS input service\n", NAME);
        
        sysarg_t obio;
        
        list_initialize(&kbd_devs);
        list_initialize(&mouse_devs);
        
        if ((sysinfo_get_value("kbd.cir.obio", &obio) == EOK) && (obio))
                irc_service = true;
        
        if (irc_service) {
                while (irc_phone < 0)
                        irc_phone = service_obsolete_connect_blocking(SERVICE_IRC, 0, 0);
        }
        
        /* Add legacy keyboard devices. */
        kbd_add_legacy_devs();
        
        /* Add legacy mouse devices. */
        mouse_add_legacy_devs();
        
        /* Register driver */
        int rc = devmap_driver_register(NAME, client_connection);
        if (rc < 0) {
                printf("%s: Unable to register driver (%d)\n", NAME, rc);
                return -1;
        }
        
        char kbd[DEVMAP_NAME_MAXLEN + 1];
        snprintf(kbd, DEVMAP_NAME_MAXLEN, "%s/%s", NAMESPACE, NAME);
        
        devmap_handle_t devmap_handle;
        if (devmap_device_register(kbd, &devmap_handle) != EOK) {
                printf("%s: Unable to register device %s\n", NAME, kbd);
                return -1;
        }
        
        /* Start looking for new input devices */
        input_start_dev_discovery();
        
        printf("%s: Accepting connections\n", NAME);
        async_manager();
        
        /* Not reached. */
        return 0;
}

/**
 * @}
 */