source: mainline/uspace/drv/usbhid/lgtch-ultrax/lgtch-ultrax.c@ a29529b

/*
 * Copyright (c) 2011 Lubos Slovak, Vojtech Horky
 * 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 drvusbhid
 * @{
 */
/**
 * @file
 * USB Logitech UltraX Keyboard sample driver.
 */


#include "lgtch-ultrax.h"
#include "../usbhid.h"
#include "keymap.h"

#include <usb/classes/hidparser.h>
#include <usb/debug.h>
#include <usb/classes/hidut.h>

#include <errno.h>
#include <str_error.h>

#include <ipc/kbd.h>
#include <io/console.h>

#define NAME "lgtch-ultrax"

typedef enum usb_lgtch_flags {
        USB_LGTCH_STATUS_UNINITIALIZED = 0,
        USB_LGTCH_STATUS_INITIALIZED = 1,
        USB_LGTCH_STATUS_TO_DESTROY = -1
} usb_lgtch_flags;

/*----------------------------------------------------------------------------*/
/**
 * Logitech UltraX device type.
 */
typedef struct usb_lgtch_ultrax_t {
        /** Previously pressed keys (not translated to key codes). */
        int32_t *keys_old;
        /** Currently pressed keys (not translated to key codes). */
        int32_t *keys;
        /** Count of stored keys (i.e. number of keys in the report). */
        size_t key_count;
        
        /** IPC phone to the console device (for sending key events). */
        int console_phone;

        /** Information for auto-repeat of keys. */
//      usb_kbd_repeat_t repeat;
        
        /** Mutex for accessing the information about auto-repeat. */
//      fibril_mutex_t *repeat_mtx;

        /** State of the structure (for checking before use). 
         * 
         * 0 - not initialized
         * 1 - initialized
         * -1 - ready for destroying
         */
        int initialized;
} usb_lgtch_ultrax_t;


/*----------------------------------------------------------------------------*/
/** 
 * Default handler for IPC methods not handled by DDF.
 *
 * Currently recognizes only one method (IPC_M_CONNECT_TO_ME), in which case it
 * assumes the caller is the console and thus it stores IPC phone to it for 
 * later use by the driver to notify about key events.
 *
 * @param fun Device function handling the call.
 * @param icallid Call id.
 * @param icall Call data.
 */
static void default_connection_handler(ddf_fun_t *fun,
    ipc_callid_t icallid, ipc_call_t *icall)
{
        usb_log_debug(NAME " default_connection_handler()\n");
        
        sysarg_t method = IPC_GET_IMETHOD(*icall);
        
        usb_hid_dev_t *hid_dev = (usb_hid_dev_t *)fun->driver_data;
        
        if (hid_dev == NULL || hid_dev->data == NULL) {
                async_answer_0(icallid, EINVAL);
                return;
        }
        
        assert(hid_dev != NULL);
        assert(hid_dev->data != NULL);
        usb_lgtch_ultrax_t *lgtch_dev = (usb_lgtch_ultrax_t *)hid_dev->data;

        if (method == IPC_M_CONNECT_TO_ME) {
                int callback = IPC_GET_ARG5(*icall);

                if (lgtch_dev->console_phone != -1) {
                        async_answer_0(icallid, ELIMIT);
                        return;
                }

                lgtch_dev->console_phone = callback;
                usb_log_debug(NAME " Saved phone to console: %d\n", callback);
                async_answer_0(icallid, EOK);
                return;
        }
        
        async_answer_0(icallid, EINVAL);
}

/*----------------------------------------------------------------------------*/

static ddf_dev_ops_t lgtch_ultrax_ops = {
        .default_handler = default_connection_handler
};

/*----------------------------------------------------------------------------*/

//static void usb_lgtch_process_keycodes(const uint8_t *key_codes, size_t count,
//    uint8_t report_id, void *arg);

//static const usb_hid_report_in_callbacks_t usb_lgtch_parser_callbacks = {
//      .keyboard = usb_lgtch_process_keycodes
//};

///*----------------------------------------------------------------------------*/

//static void usb_lgtch_process_keycodes(const uint8_t *key_codes, size_t count,
//    uint8_t report_id, void *arg)
//{
//      // TODO: checks
        
//      usb_log_debug(NAME " Got keys from parser (report id: %u): %s\n", 
//          report_id, usb_debug_str_buffer(key_codes, count, 0));
//}

/*----------------------------------------------------------------------------*/
/**
 * Processes key events.
 *
 * @note This function was copied from AT keyboard driver and modified to suit
 *       USB keyboard.
 *
 * @note Lock keys are not sent to the console, as they are completely handled
 *       in the driver. It may, however, be required later that the driver
 *       sends also these keys to application (otherwise it cannot use those
 *       keys at all).
 * 
 * @param hid_dev 
 * @param lgtch_dev 
 * @param type Type of the event (press / release). Recognized values: 
 *             KEY_PRESS, KEY_RELEASE
 * @param key Key code of the key according to HID Usage Tables.
 */
static void usb_lgtch_push_ev(usb_hid_dev_t *hid_dev, int type, 
    unsigned int key)
{
        assert(hid_dev != NULL);
        assert(hid_dev->data != NULL);
        
        usb_lgtch_ultrax_t *lgtch_dev = (usb_lgtch_ultrax_t *)hid_dev->data;
        
        console_event_t ev;
        
        ev.type = type;
        ev.key = key;
        ev.mods = 0;

        ev.c = 0;

        usb_log_debug2(NAME " Sending key %d to the console\n", ev.key);
        if (lgtch_dev->console_phone < 0) {
                usb_log_warning(
                    "Connection to console not ready, key discarded.\n");
                return;
        }
        
        async_msg_4(lgtch_dev->console_phone, KBD_EVENT, ev.type, ev.key, 
            ev.mods, ev.c);
}

/*----------------------------------------------------------------------------*/

static void usb_lgtch_free(usb_lgtch_ultrax_t **lgtch_dev)
{
        if (lgtch_dev == NULL || *lgtch_dev == NULL) {
                return;
        }
        
        // hangup phone to the console
        async_hangup((*lgtch_dev)->console_phone);
        
//      if ((*lgtch_dev)->repeat_mtx != NULL) {
//              /* TODO: replace by some check and wait */
//              assert(!fibril_mutex_is_locked((*lgtch_dev)->repeat_mtx));
//              free((*lgtch_dev)->repeat_mtx);
//      }
        
        // free all buffers
        if ((*lgtch_dev)->keys != NULL) {
                free((*lgtch_dev)->keys);
        }
        if ((*lgtch_dev)->keys_old != NULL) {
                free((*lgtch_dev)->keys_old);
        }

        free(*lgtch_dev);
        *lgtch_dev = NULL;
}

/*----------------------------------------------------------------------------*/

static int usb_lgtch_create_function(usb_hid_dev_t *hid_dev)
{
        /* Create the function exposed under /dev/devices. */
        ddf_fun_t *fun = ddf_fun_create(hid_dev->usb_dev->ddf_dev, fun_exposed, 
            NAME);
        if (fun == NULL) {
                usb_log_error("Could not create DDF function node.\n");
                return ENOMEM;
        }
        
        /*
         * Store the initialized HID device and HID ops
         * to the DDF function.
         */
        fun->ops = &lgtch_ultrax_ops;
        fun->driver_data = hid_dev;   // TODO: maybe change to hid_dev->data
        
        int rc = ddf_fun_bind(fun);
        if (rc != EOK) {
                usb_log_error("Could not bind DDF function: %s.\n",
                    str_error(rc));
                // TODO: Can / should I destroy the DDF function?
                ddf_fun_destroy(fun);
                return rc;
        }
        
        rc = ddf_fun_add_to_class(fun, "keyboard");
        if (rc != EOK) {
                usb_log_error(
                    "Could not add DDF function to class 'keyboard': %s.\n",
                    str_error(rc));
                // TODO: Can / should I destroy the DDF function?
                ddf_fun_destroy(fun);
                return rc;
        }
        
        return EOK;
}

/*----------------------------------------------------------------------------*/

int usb_lgtch_init(struct usb_hid_dev *hid_dev)
{
        if (hid_dev == NULL || hid_dev->usb_dev == NULL) {
                return EINVAL; /*! @todo Other return code? */
        }
        
        usb_log_debug(NAME " Initializing HID/lgtch_ultrax structure...\n");
        
        usb_lgtch_ultrax_t *lgtch_dev = (usb_lgtch_ultrax_t *)malloc(
            sizeof(usb_lgtch_ultrax_t));
        if (lgtch_dev == NULL) {
                return ENOMEM;
        }
        
        lgtch_dev->console_phone = -1;
        
        usb_hid_report_path_t *path = usb_hid_report_path();
        usb_hid_report_path_append_item(path, USB_HIDUT_PAGE_CONSUMER, 0);
        
        usb_hid_report_path_set_report_id(path, 1);
        
        lgtch_dev->key_count = usb_hid_report_input_length(
            hid_dev->report, path, 
            USB_HID_PATH_COMPARE_END | USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY);
        usb_hid_report_path_free(path);
        
        usb_log_debug(NAME " Size of the input report: %zu\n", 
            lgtch_dev->key_count);
        
        lgtch_dev->keys = (int32_t *)calloc(lgtch_dev->key_count, 
            sizeof(int32_t));
        
        if (lgtch_dev->keys == NULL) {
                usb_log_fatal("No memory!\n");
                free(lgtch_dev);
                return ENOMEM;
        }
        
        lgtch_dev->keys_old = 
                (int32_t *)calloc(lgtch_dev->key_count, sizeof(int32_t));
        
        if (lgtch_dev->keys_old == NULL) {
                usb_log_fatal("No memory!\n");
                free(lgtch_dev->keys);
                free(lgtch_dev);
                return ENOMEM;
        }
        
        /*! @todo Autorepeat */
        
        // save the KBD device structure into the HID device structure
        hid_dev->data = lgtch_dev;
        
        lgtch_dev->initialized = USB_LGTCH_STATUS_INITIALIZED;
        usb_log_debug(NAME " HID/lgtch_ultrax device structure initialized.\n");
        
        int rc = usb_lgtch_create_function(hid_dev);
        if (rc != EOK) {
                usb_lgtch_free(&lgtch_dev);
                return rc;
        }
        
        usb_log_debug(NAME " HID/lgtch_ultrax structure initialized.\n");
        
        return EOK;
}

/*----------------------------------------------------------------------------*/

void usb_lgtch_deinit(struct usb_hid_dev *hid_dev)
{
        if (hid_dev == NULL) {
                return;
        }
        
        if (hid_dev->data != NULL) {
                usb_lgtch_ultrax_t *lgtch_dev = 
                    (usb_lgtch_ultrax_t *)hid_dev->data;
//              if (usb_kbd_is_initialized(kbd_dev)) {
//                      usb_kbd_mark_unusable(kbd_dev);
//              } else {
                        usb_lgtch_free(&lgtch_dev);
                        hid_dev->data = NULL;
//              }
        }
}

/*----------------------------------------------------------------------------*/

bool usb_lgtch_polling_callback(struct usb_hid_dev *hid_dev, 
    uint8_t *buffer, size_t buffer_size)
{
        // TODO: checks
        
        usb_log_debug(NAME " usb_lgtch_polling_callback(%p, %p, %zu)\n",
            hid_dev, buffer, buffer_size);

        usb_log_debug(NAME " Calling usb_hid_parse_report() with "
            "buffer %s\n", usb_debug_str_buffer(buffer, buffer_size, 0));
        
        usb_hid_report_path_t *path = usb_hid_report_path();
        usb_hid_report_path_append_item(path, 0xc, 0);

        uint8_t report_id;
        
        int rc = usb_hid_parse_report(hid_dev->report, buffer, buffer_size, 
            &report_id);
        
        if (rc != EOK) {
                usb_log_warning(NAME "Error in usb_hid_parse_report(): %s\n", 
                    str_error(rc));
                return true;
        }
        
        usb_hid_report_path_set_report_id(path, report_id);

        usb_hid_report_field_t *field = usb_hid_report_get_sibling(
            hid_dev->report, NULL, path, USB_HID_PATH_COMPARE_END 
            | USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY, 
            USB_HID_REPORT_TYPE_INPUT);
        
        unsigned int key;
        
        /*! @todo Is this iterating OK if done multiple times? 
         *  @todo The parsing is not OK
         */
        while (field != NULL) {
                usb_log_debug(NAME " KEY VALUE(%X) USAGE(%X)\n", field->value, 
                    field->usage);
                
                key = usb_lgtch_map_usage(field->usage);
                usb_lgtch_push_ev(hid_dev, KEY_PRESS, key);
                
                field = usb_hid_report_get_sibling(
                    hid_dev->report, field, path, USB_HID_PATH_COMPARE_END
                    | USB_HID_PATH_COMPARE_USAGE_PAGE_ONLY, 
                    USB_HID_REPORT_TYPE_INPUT);
        }       

        usb_hid_report_path_free(path);
        
        return true;
}

/**
 * @}
 */