// SPDX-License-Identifier: GPL-2.0-only
/* DVB USB framework compliant Linux driver for the AVerMedia AverTV DVB-T
 * USB2.0 (A800) DVB-T receiver.
 *
 * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@posteo.de)
 *
 * Thanks to
 *   - AVerMedia who kindly provided information and
 *   - Glen Harris who suffered from my mistakes during development.
 *
 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
 */
#include "dibusb.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (rc=1 (or-able))." DVB_USB_DEBUG_STATUS);

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define deb_rc(args...)   dprintk(debug,0x01,args)

static int a800_power_ctrl(struct dvb_usb_device *d, int onoff)
{
        /* do nothing for the AVerMedia */
        return 0;
}

/* assure to put cold to 0 for iManufacturer == 1 */
static int a800_identify_state(struct usb_device *udev,
                               const struct dvb_usb_device_properties *props,
                               const struct dvb_usb_device_description **desc,
                               int *cold)
{
        *cold = udev->descriptor.iManufacturer != 1;
        return 0;
}

static int a800_rc_query(struct dvb_usb_device *d)
{
        int ret = 0;
        u8 *key = kmalloc(5, GFP_KERNEL);
        if (!key)
                return -ENOMEM;

        if (usb_control_msg(d->udev,usb_rcvctrlpipe(d->udev,0),
                                0x04, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, key, 5,
                                2000) != 5) {
                ret = -ENODEV;
                goto out;
        }

        /* Note that extended nec and nec32 are dropped */
        if (key[0] == 1)
                rc_keydown(d->rc_dev, RC_PROTO_NEC,
                           RC_SCANCODE_NEC(key[1], key[3]), 0);
        else if (key[0] == 2)
                rc_repeat(d->rc_dev);
out:
        kfree(key);
        return ret;
}

/* USB Driver stuff */
static struct dvb_usb_device_properties a800_properties;

static int a800_probe(struct usb_interface *intf,
                const struct usb_device_id *id)
{
        return dvb_usb_device_init(intf, &a800_properties,
                                   THIS_MODULE, NULL, adapter_nr);
}

/* do not change the order of the ID table */
enum {
        AVERMEDIA_DVBT_USB2_COLD,
        AVERMEDIA_DVBT_USB2_WARM,
};

static const struct usb_device_id a800_table[] = {
        DVB_USB_DEV(AVERMEDIA, AVERMEDIA_DVBT_USB2_COLD),
        DVB_USB_DEV(AVERMEDIA, AVERMEDIA_DVBT_USB2_WARM),
        { }
};

MODULE_DEVICE_TABLE (usb, a800_table);

static struct dvb_usb_device_properties a800_properties = {
        .caps = DVB_USB_IS_AN_I2C_ADAPTER,

        .usb_ctrl = CYPRESS_FX2,
        .firmware = "dvb-usb-avertv-a800-02.fw",

        .num_adapters = 1,
        .adapter = {
                {
                .num_frontends = 1,
                .fe = {{
                        .caps = DVB_USB_ADAP_HAS_PID_FILTER | DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF,
                        .pid_filter_count = 32,
                        .streaming_ctrl   = dibusb2_0_streaming_ctrl,
                        .pid_filter       = dibusb_pid_filter,
                        .pid_filter_ctrl  = dibusb_pid_filter_ctrl,

                        .frontend_attach  = dibusb_dib3000mc_frontend_attach,
                        .tuner_attach     = dibusb_dib3000mc_tuner_attach,

                        /* parameter for the MPEG2-data transfer */
                                        .stream = {
                                                .type = USB_BULK,
                                .count = 7,
                                .endpoint = 0x06,
                                .u = {
                                        .bulk = {
                                                .buffersize = 4096,
                                        }
                                }
                        },
                }},
                        .size_of_priv     = sizeof(struct dibusb_state),
                },
        },

        .power_ctrl       = a800_power_ctrl,
        .identify_state   = a800_identify_state,

        .rc.core = {
                .rc_interval    = DEFAULT_RC_INTERVAL,
                .rc_codes       = RC_MAP_AVERMEDIA_M135A,
                .module_name    = KBUILD_MODNAME,
                .rc_query       = a800_rc_query,
                .allowed_protos = RC_PROTO_BIT_NEC,
        },

        .i2c_algo         = &dibusb_i2c_algo,

        .generic_bulk_ctrl_endpoint = 0x01,
        .num_device_descs = 1,
        .devices = {
                {   "AVerMedia AverTV DVB-T USB 2.0 (A800)",
                        { &a800_table[AVERMEDIA_DVBT_USB2_COLD], NULL },
                        { &a800_table[AVERMEDIA_DVBT_USB2_WARM], NULL },
                },
        }
};

static struct usb_driver a800_driver = {
        .name           = "dvb_usb_a800",
        .probe          = a800_probe,
        .disconnect = dvb_usb_device_exit,
        .id_table       = a800_table,
};

module_usb_driver(a800_driver);

MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
MODULE_DESCRIPTION("AVerMedia AverTV DVB-T USB 2.0 (A800)");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");