/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2007 Hans Petter Selasky <hselasky@FreeBSD.org>
 * Copyright (c) 2018 The FreeBSD Foundation
 * All rights reserved.
 *
 * Portions of this software were developed by Edward Tomasz Napierala
 * under sponsorship from the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 */

/*
 * This file contains the USB templates for a CDC USB ethernet device.
 */

#ifdef USB_GLOBAL_INCLUDE_FILE
#include USB_GLOBAL_INCLUDE_FILE
#else
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_cdc.h>
#include <dev/usb/usb_ioctl.h>
#include <dev/usb/usb_util.h>

#include <dev/usb/template/usb_template.h>
#endif                  /* USB_GLOBAL_INCLUDE_FILE */

enum {
        ETH_LANG_INDEX,
        ETH_MAC_INDEX,
        ETH_CONTROL_INDEX,
        ETH_DATA_INDEX,
        ETH_CONFIGURATION_INDEX,
        ETH_MANUFACTURER_INDEX,
        ETH_PRODUCT_INDEX,
        ETH_SERIAL_NUMBER_INDEX,
        ETH_MAX_INDEX,
};

#define ETH_DEFAULT_VENDOR_ID           USB_TEMPLATE_VENDOR
#define ETH_DEFAULT_PRODUCT_ID          0x27e1
#define ETH_DEFAULT_MAC                 "2A02030405060789AB"
#define ETH_DEFAULT_CONTROL             "USB Ethernet Comm Interface"
#define ETH_DEFAULT_DATA                "USB Ethernet Data Interface"
#define ETH_DEFAULT_CONFIG              "Default Config"
#define ETH_DEFAULT_MANUFACTURER        USB_TEMPLATE_MANUFACTURER
#define ETH_DEFAULT_PRODUCT             "USB Ethernet Adapter"
#define ETH_DEFAULT_SERIAL_NUMBER       "December 2007"

static struct usb_string_descriptor     eth_mac;
static struct usb_string_descriptor     eth_control;
static struct usb_string_descriptor     eth_data;
static struct usb_string_descriptor     eth_configuration;
static struct usb_string_descriptor     eth_manufacturer;
static struct usb_string_descriptor     eth_product;
static struct usb_string_descriptor     eth_serial_number;

static struct sysctl_ctx_list           eth_ctx_list;

/* prototypes */

static usb_temp_get_string_desc_t eth_get_string_desc;

static const struct usb_cdc_union_descriptor eth_union_desc = {
        .bLength = sizeof(eth_union_desc),
        .bDescriptorType = UDESC_CS_INTERFACE,
        .bDescriptorSubtype = UDESCSUB_CDC_UNION,
        .bMasterInterface = 0,          /* this is automatically updated */
        .bSlaveInterface[0] = 1,        /* this is automatically updated */
};

static const struct usb_cdc_header_descriptor eth_header_desc = {
        .bLength = sizeof(eth_header_desc),
        .bDescriptorType = UDESC_CS_INTERFACE,
        .bDescriptorSubtype = UDESCSUB_CDC_HEADER,
        .bcdCDC[0] = 0x10,
        .bcdCDC[1] = 0x01,
};

static const struct usb_cdc_ethernet_descriptor eth_enf_desc = {
        .bLength = sizeof(eth_enf_desc),
        .bDescriptorType = UDESC_CS_INTERFACE,
        .bDescriptorSubtype = UDESCSUB_CDC_ENF,
        .iMacAddress = ETH_MAC_INDEX,
        .bmEthernetStatistics = {0, 0, 0, 0},
        .wMaxSegmentSize = {0xEA, 0x05},/* 1514 bytes */
        .wNumberMCFilters = {0, 0},
        .bNumberPowerFilters = 0,
};

static const void *eth_control_if_desc[] = {
        &eth_union_desc,
        &eth_header_desc,
        &eth_enf_desc,
        NULL,
};

static const struct usb_temp_packet_size bulk_mps = {
        .mps[USB_SPEED_FULL] = 64,
        .mps[USB_SPEED_HIGH] = 512,
};

static const struct usb_temp_packet_size intr_mps = {
        .mps[USB_SPEED_FULL] = 8,
        .mps[USB_SPEED_HIGH] = 8,
};

static const struct usb_temp_endpoint_desc bulk_in_ep = {
        .pPacketSize = &bulk_mps,
#ifdef USB_HIP_IN_EP_0
        .bEndpointAddress = USB_HIP_IN_EP_0,
#else
        .bEndpointAddress = UE_DIR_IN,
#endif
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc bulk_out_ep = {
        .pPacketSize = &bulk_mps,
#ifdef USB_HIP_OUT_EP_0
        .bEndpointAddress = USB_HIP_OUT_EP_0,
#else
        .bEndpointAddress = UE_DIR_OUT,
#endif
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc intr_in_ep = {
        .pPacketSize = &intr_mps,
        .bEndpointAddress = UE_DIR_IN,
        .bmAttributes = UE_INTERRUPT,
};

static const struct usb_temp_endpoint_desc *eth_intr_endpoints[] = {
        &intr_in_ep,
        NULL,
};

static const struct usb_temp_interface_desc eth_control_interface = {
        .ppEndpoints = eth_intr_endpoints,
        .ppRawDesc = eth_control_if_desc,
        .bInterfaceClass = UICLASS_CDC,
        .bInterfaceSubClass = UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL,
        .bInterfaceProtocol = 0,
        .iInterface = ETH_CONTROL_INDEX,
};

static const struct usb_temp_endpoint_desc *eth_data_endpoints[] = {
        &bulk_in_ep,
        &bulk_out_ep,
        NULL,
};

static const struct usb_temp_interface_desc eth_data_null_interface = {
        .ppEndpoints = NULL,            /* no endpoints */
        .bInterfaceClass = UICLASS_CDC_DATA,
        .bInterfaceSubClass = 0,
        .bInterfaceProtocol = 0,
        .iInterface = ETH_DATA_INDEX,
};

static const struct usb_temp_interface_desc eth_data_interface = {
        .ppEndpoints = eth_data_endpoints,
        .bInterfaceClass = UICLASS_CDC_DATA,
        .bInterfaceSubClass = UISUBCLASS_DATA,
        .bInterfaceProtocol = 0,
        .iInterface = ETH_DATA_INDEX,
        .isAltInterface = 1,            /* this is an alternate setting */
};

static const struct usb_temp_interface_desc *eth_interfaces[] = {
        &eth_control_interface,
        &eth_data_null_interface,
        &eth_data_interface,
        NULL,
};

static const struct usb_temp_config_desc eth_config_desc = {
        .ppIfaceDesc = eth_interfaces,
        .bmAttributes = 0,
        .bMaxPower = 0,
        .iConfiguration = ETH_CONFIGURATION_INDEX,
};

static const struct usb_temp_config_desc *eth_configs[] = {
        &eth_config_desc,
        NULL,
};

struct usb_temp_device_desc usb_template_cdce = {
        .getStringDesc = &eth_get_string_desc,
        .ppConfigDesc = eth_configs,
        .idVendor = ETH_DEFAULT_VENDOR_ID,
        .idProduct = ETH_DEFAULT_PRODUCT_ID,
        .bcdDevice = 0x0100,
        .bDeviceClass = UDCLASS_COMM,
        .bDeviceSubClass = 0,
        .bDeviceProtocol = 0,
        .iManufacturer = ETH_MANUFACTURER_INDEX,
        .iProduct = ETH_PRODUCT_INDEX,
        .iSerialNumber = ETH_SERIAL_NUMBER_INDEX,
};

/*------------------------------------------------------------------------*
 *      eth_get_string_desc
 *
 * Return values:
 * NULL: Failure. No such string.
 * Else: Success. Pointer to string descriptor is returned.
 *------------------------------------------------------------------------*/
static const void *
eth_get_string_desc(uint16_t lang_id, uint8_t string_index)
{
        static const void *ptr[ETH_MAX_INDEX] = {
                [ETH_LANG_INDEX] = &usb_string_lang_en,
                [ETH_MAC_INDEX] = &eth_mac,
                [ETH_CONTROL_INDEX] = &eth_control,
                [ETH_DATA_INDEX] = &eth_data,
                [ETH_CONFIGURATION_INDEX] = &eth_configuration,
                [ETH_MANUFACTURER_INDEX] = &eth_manufacturer,
                [ETH_PRODUCT_INDEX] = &eth_product,
                [ETH_SERIAL_NUMBER_INDEX] = &eth_serial_number,
        };

        if (string_index == 0) {
                return (&usb_string_lang_en);
        }
        if (lang_id != 0x0409) {
                return (NULL);
        }
        if (string_index < ETH_MAX_INDEX) {
                return (ptr[string_index]);
        }
        return (NULL);
}

static void
eth_init(void *arg __unused)
{
        struct sysctl_oid *parent;
        char parent_name[3];

        usb_make_str_desc(&eth_mac, sizeof(eth_mac),
            ETH_DEFAULT_MAC);
        usb_make_str_desc(&eth_control, sizeof(eth_control),
            ETH_DEFAULT_CONTROL);
        usb_make_str_desc(&eth_data, sizeof(eth_data),
            ETH_DEFAULT_DATA);
        usb_make_str_desc(&eth_configuration, sizeof(eth_configuration),
            ETH_DEFAULT_CONFIG);
        usb_make_str_desc(&eth_manufacturer, sizeof(eth_manufacturer),
            ETH_DEFAULT_MANUFACTURER);
        usb_make_str_desc(&eth_product, sizeof(eth_product),
            ETH_DEFAULT_PRODUCT);
        usb_make_str_desc(&eth_serial_number, sizeof(eth_serial_number),
            ETH_DEFAULT_SERIAL_NUMBER);

        snprintf(parent_name, sizeof(parent_name), "%d", USB_TEMP_CDCE);
        sysctl_ctx_init(&eth_ctx_list);

        parent = SYSCTL_ADD_NODE(&eth_ctx_list,
            SYSCTL_STATIC_CHILDREN(_hw_usb_templates), OID_AUTO,
            parent_name, CTLFLAG_RW | CTLFLAG_MPSAFE,
            0, "USB CDC Ethernet device side template");
        SYSCTL_ADD_U16(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "vendor_id", CTLFLAG_RWTUN,
            &usb_template_cdce.idVendor, 1, "Vendor identifier");
        SYSCTL_ADD_U16(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "product_id", CTLFLAG_RWTUN,
            &usb_template_cdce.idProduct, 1, "Product identifier");
        SYSCTL_ADD_PROC(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "mac", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &eth_mac, sizeof(eth_mac), usb_temp_sysctl,
            "A", "MAC address string");
#if 0
        SYSCTL_ADD_PROC(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "control", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &eth_control, sizeof(eth_control), usb_temp_sysctl,
            "A", "Control interface string");
        SYSCTL_ADD_PROC(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "data", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &eth_data, sizeof(eth_data), usb_temp_sysctl,
            "A", "Data interface string");
        SYSCTL_ADD_PROC(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "configuration", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &eth_configuration, sizeof(eth_configuration), usb_temp_sysctl,
            "A", "Configuration string");
#endif
        SYSCTL_ADD_PROC(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "manufacturer", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &eth_manufacturer, sizeof(eth_manufacturer), usb_temp_sysctl,
            "A", "Manufacturer string");
        SYSCTL_ADD_PROC(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "product", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &eth_product, sizeof(eth_product), usb_temp_sysctl,
            "A", "Product string");
        SYSCTL_ADD_PROC(&eth_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "serial_number", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &eth_serial_number, sizeof(eth_serial_number), usb_temp_sysctl,
            "A", "Serial number string");
}

static void
eth_uninit(void *arg __unused)
{

        sysctl_ctx_free(&eth_ctx_list);
}

SYSINIT(eth_init, SI_SUB_LOCK, SI_ORDER_FIRST, eth_init, NULL);
SYSUNINIT(eth_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, eth_uninit, NULL);