/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
 * Copyright (c) 2018 The FreeBSD Foundation
 * All rights reserved.
 *
 * This software was developed by SRI International and the University of
 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
 * ("CTSRD"), as part of the DARPA CRASH research programme.
 *
 * 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 template for USB Networking and Serial
 */

#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 */

#define MODEM_IFACE_0 0
#define MODEM_IFACE_1 1

enum {
        SERIALNET_LANG_INDEX,
        SERIALNET_MODEM_INDEX,
        SERIALNET_ETH_MAC_INDEX,
        SERIALNET_ETH_CONTROL_INDEX,
        SERIALNET_ETH_DATA_INDEX,
        SERIALNET_CONFIGURATION_INDEX,
        SERIALNET_MANUFACTURER_INDEX,
        SERIALNET_PRODUCT_INDEX,
        SERIALNET_SERIAL_NUMBER_INDEX,
        SERIALNET_MAX_INDEX,
};

#define SERIALNET_DEFAULT_VENDOR_ID     USB_TEMPLATE_VENDOR
#define SERIALNET_DEFAULT_PRODUCT_ID    0x05dc
#define SERIALNET_DEFAULT_MODEM         "Virtual serial port"
#define SERIALNET_DEFAULT_ETH_MAC       "2A02030405060789AB"
#define SERIALNET_DEFAULT_ETH_CONTROL   "USB Ethernet Comm Interface"
#define SERIALNET_DEFAULT_ETH_DATA      "USB Ethernet Data Interface"
#define SERIALNET_DEFAULT_CONFIGURATION "Default configuration"
#define SERIALNET_DEFAULT_MANUFACTURER  USB_TEMPLATE_MANUFACTURER
#define SERIALNET_DEFAULT_PRODUCT       "Serial/Ethernet device"
/*
 * The reason for this being called like this is that OSX
 * derives the device node name from it, resulting in a somewhat
 * user-friendly "/dev/cu.usbmodemFreeBSD1".  And yes, the "1"
 * needs to be there, otherwise OSX will mangle it.
 */
#define SERIALNET_DEFAULT_SERIAL_NUMBER "FreeBSD1"

static struct usb_string_descriptor     serialnet_modem;
static struct usb_string_descriptor     serialnet_eth_mac;
static struct usb_string_descriptor     serialnet_eth_control;
static struct usb_string_descriptor     serialnet_eth_data;
static struct usb_string_descriptor     serialnet_configuration;
static struct usb_string_descriptor     serialnet_manufacturer;
static struct usb_string_descriptor     serialnet_product;
static struct usb_string_descriptor     serialnet_serial_number;

static struct sysctl_ctx_list           serialnet_ctx_list;

/* prototypes */

static usb_temp_get_string_desc_t serialnet_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 = SERIALNET_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 = UIPROTO_CDC_NONE,
        .iInterface = SERIALNET_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 = UISUBCLASS_DATA,
        .bInterfaceProtocol = 0,
        .iInterface = SERIALNET_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 = SERIALNET_ETH_DATA_INDEX,
        .isAltInterface = 1,            /* this is an alternate setting */
};

static const struct usb_temp_packet_size modem_bulk_mps = {
        .mps[USB_SPEED_LOW] = 8,
        .mps[USB_SPEED_FULL] = 64,
        .mps[USB_SPEED_HIGH] = 512,
};

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

static const struct usb_temp_interval modem_intr_interval = {
        .bInterval[USB_SPEED_LOW] = 8,  /* 8ms */
        .bInterval[USB_SPEED_FULL] = 8, /* 8ms */
        .bInterval[USB_SPEED_HIGH] = 7, /* 8ms */
};

static const struct usb_temp_endpoint_desc modem_ep_0 = {
        .pPacketSize = &modem_intr_mps,
        .pIntervals = &modem_intr_interval,
        .bEndpointAddress = UE_DIR_IN,
        .bmAttributes = UE_INTERRUPT,
};

static const struct usb_temp_endpoint_desc modem_ep_1 = {
        .pPacketSize = &modem_bulk_mps,
        .bEndpointAddress = UE_DIR_OUT,
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc modem_ep_2 = {
        .pPacketSize = &modem_bulk_mps,
        .bEndpointAddress = UE_DIR_IN,
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc *modem_iface_0_ep[] = {
        &modem_ep_0,
        NULL,
};

static const struct usb_temp_endpoint_desc *modem_iface_1_ep[] = {
        &modem_ep_1,
        &modem_ep_2,
        NULL,
};

static const uint8_t modem_raw_desc_0[] = {
        0x05, 0x24, 0x00, 0x10, 0x01
};

static const uint8_t modem_raw_desc_1[] = {
        0x05, 0x24, 0x06, MODEM_IFACE_0, MODEM_IFACE_1
};

static const uint8_t modem_raw_desc_2[] = {
        0x05, 0x24, 0x01, 0x03, MODEM_IFACE_1
};

static const uint8_t modem_raw_desc_3[] = {
        0x04, 0x24, 0x02, 0x07
};

static const void *modem_iface_0_desc[] = {
        &modem_raw_desc_0,
        &modem_raw_desc_1,
        &modem_raw_desc_2,
        &modem_raw_desc_3,
        NULL,
};

static const struct usb_temp_interface_desc modem_iface_0 = {
        .ppRawDesc = modem_iface_0_desc,
        .ppEndpoints = modem_iface_0_ep,
        .bInterfaceClass = UICLASS_CDC,
        .bInterfaceSubClass = UISUBCLASS_ABSTRACT_CONTROL_MODEL,
        .bInterfaceProtocol = UIPROTO_CDC_NONE,
        .iInterface = SERIALNET_MODEM_INDEX,
};

static const struct usb_temp_interface_desc modem_iface_1 = {
        .ppEndpoints = modem_iface_1_ep,
        .bInterfaceClass = UICLASS_CDC_DATA,
        .bInterfaceSubClass = UISUBCLASS_DATA,
        .bInterfaceProtocol = 0,
        .iInterface = SERIALNET_MODEM_INDEX,
};

static const struct usb_temp_interface_desc *serialnet_interfaces[] = {
        &modem_iface_0,
        &modem_iface_1,
        &eth_control_interface,
        &eth_data_null_interface,
        &eth_data_interface,
        NULL,
};

static const struct usb_temp_config_desc serialnet_config_desc = {
        .ppIfaceDesc = serialnet_interfaces,
        .bmAttributes = 0,
        .bMaxPower = 0,
        .iConfiguration = SERIALNET_CONFIGURATION_INDEX,
};
static const struct usb_temp_config_desc *serialnet_configs[] = {
        &serialnet_config_desc,
        NULL,
};

struct usb_temp_device_desc usb_template_serialnet = {
        .getStringDesc = &serialnet_get_string_desc,
        .ppConfigDesc = serialnet_configs,
        .idVendor = SERIALNET_DEFAULT_VENDOR_ID,
        .idProduct = SERIALNET_DEFAULT_PRODUCT_ID,
        .bcdDevice = 0x0100,
        .bDeviceClass = UDCLASS_IN_INTERFACE,
        .bDeviceSubClass = 0,
        .bDeviceProtocol = 0,
        .iManufacturer = SERIALNET_MANUFACTURER_INDEX,
        .iProduct = SERIALNET_PRODUCT_INDEX,
        .iSerialNumber = SERIALNET_SERIAL_NUMBER_INDEX,
};

/*------------------------------------------------------------------------*
 *      serialnet_get_string_desc
 *
 * Return values:
 * NULL: Failure. No such string.
 * Else: Success. Pointer to string descriptor is returned.
 *------------------------------------------------------------------------*/
static const void *
serialnet_get_string_desc(uint16_t lang_id, uint8_t string_index)
{
        static const void *ptr[SERIALNET_MAX_INDEX] = {
                [SERIALNET_LANG_INDEX] = &usb_string_lang_en,
                [SERIALNET_MODEM_INDEX] = &serialnet_modem,
                [SERIALNET_ETH_MAC_INDEX] = &serialnet_eth_mac,
                [SERIALNET_ETH_CONTROL_INDEX] = &serialnet_eth_control,
                [SERIALNET_ETH_DATA_INDEX] = &serialnet_eth_data,
                [SERIALNET_CONFIGURATION_INDEX] = &serialnet_configuration,
                [SERIALNET_MANUFACTURER_INDEX] = &serialnet_manufacturer,
                [SERIALNET_PRODUCT_INDEX] = &serialnet_product,
                [SERIALNET_SERIAL_NUMBER_INDEX] = &serialnet_serial_number,
        };

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

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

        usb_make_str_desc(&serialnet_modem, sizeof(serialnet_modem),
            SERIALNET_DEFAULT_MODEM);
        usb_make_str_desc(&serialnet_eth_mac, sizeof(serialnet_eth_mac),
            SERIALNET_DEFAULT_ETH_MAC);
        usb_make_str_desc(&serialnet_eth_control, sizeof(serialnet_eth_control),
            SERIALNET_DEFAULT_ETH_CONTROL);
        usb_make_str_desc(&serialnet_eth_data, sizeof(serialnet_eth_data),
            SERIALNET_DEFAULT_ETH_DATA);
        usb_make_str_desc(&serialnet_configuration, sizeof(serialnet_configuration),
            SERIALNET_DEFAULT_CONFIGURATION);
        usb_make_str_desc(&serialnet_manufacturer, sizeof(serialnet_manufacturer),
            SERIALNET_DEFAULT_MANUFACTURER);
        usb_make_str_desc(&serialnet_product, sizeof(serialnet_product),
            SERIALNET_DEFAULT_PRODUCT);
        usb_make_str_desc(&serialnet_serial_number, sizeof(serialnet_serial_number),
            SERIALNET_DEFAULT_SERIAL_NUMBER);

        snprintf(parent_name, sizeof(parent_name), "%d", USB_TEMP_SERIALNET);
        sysctl_ctx_init(&serialnet_ctx_list);

        parent = SYSCTL_ADD_NODE(&serialnet_ctx_list,
            SYSCTL_STATIC_CHILDREN(_hw_usb_templates), OID_AUTO,
            parent_name, CTLFLAG_RW | CTLFLAG_MPSAFE,
            0, "USB CDC Serial/Ethernet device side template");
        SYSCTL_ADD_U16(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "vendor_id", CTLFLAG_RWTUN,
            &usb_template_serialnet.idVendor, 1, "Vendor identifier");
        SYSCTL_ADD_U16(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "product_id", CTLFLAG_RWTUN,
            &usb_template_serialnet.idProduct, 1, "Product identifier");
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "eth_mac", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_eth_mac, sizeof(serialnet_eth_mac), usb_temp_sysctl,
            "A", "Ethernet MAC address string");
#if 0
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "modem", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_modem, sizeof(serialnet_modem), usb_temp_sysctl,
            "A", "Modem interface string");
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "eth_control", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_eth_control, sizeof(serialnet_eth_data), usb_temp_sysctl,
            "A", "Ethernet control interface string");
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "eth_data", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_eth_data, sizeof(serialnet_eth_data), usb_temp_sysctl,
            "A", "Ethernet data interface string");
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "configuration", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_configuration, sizeof(serialnet_configuration), usb_temp_sysctl,
            "A", "Configuration string");
#endif
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "manufacturer", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_manufacturer, sizeof(serialnet_manufacturer), usb_temp_sysctl,
            "A", "Manufacturer string");
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "product", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_product, sizeof(serialnet_product), usb_temp_sysctl,
            "A", "Product string");
        SYSCTL_ADD_PROC(&serialnet_ctx_list, SYSCTL_CHILDREN(parent), OID_AUTO,
            "serial_number", CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
            &serialnet_serial_number, sizeof(serialnet_serial_number), usb_temp_sysctl,
            "A", "Serial number string");
}

static void
serialnet_uninit(void *arg __unused)
{

        sysctl_ctx_free(&serialnet_ctx_list);
}

SYSINIT(serialnet_init, SI_SUB_LOCK, SI_ORDER_FIRST, serialnet_init, NULL);
SYSUNINIT(serialnet_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, serialnet_uninit, NULL);