// SPDX-License-Identifier: GPL-2.0-only
/* DVB USB compliant Linux driver for the
 *  - TwinhanDTV Alpha/MagicBoxII USB2.0 DVB-T receiver
 *  - DigitalNow TinyUSB2 DVB-t receiver
 *
 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
 *
 * Thanks to Twinhan who kindly provided hardware and information.
 *
 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
 */
#include "vp7045.h"

/* debug */
static int dvb_usb_vp7045_debug;
module_param_named(debug,dvb_usb_vp7045_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,rc=4 (or-able))." DVB_USB_DEBUG_STATUS);

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define deb_info(args...) dprintk(dvb_usb_vp7045_debug,0x01,args)
#define deb_xfer(args...) dprintk(dvb_usb_vp7045_debug,0x02,args)
#define deb_rc(args...)   dprintk(dvb_usb_vp7045_debug,0x04,args)

int vp7045_usb_op(struct dvb_usb_device *d, u8 cmd, u8 *out, int outlen, u8 *in, int inlen, int msec)
{
        int ret = 0;
        u8 *buf = d->priv;

        buf[0] = cmd;

        if (outlen > 19)
                outlen = 19;

        if (inlen > 11)
                inlen = 11;

        ret = mutex_lock_interruptible(&d->usb_mutex);
        if (ret)
                return ret;

        if (out != NULL && outlen > 0)
                memcpy(&buf[1], out, outlen);

        deb_xfer("out buffer: ");
        debug_dump(buf, outlen+1, deb_xfer);


        if (usb_control_msg(d->udev,
                        usb_sndctrlpipe(d->udev,0),
                        TH_COMMAND_OUT, USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0,
                        buf, 20, 2000) != 20) {
                err("USB control message 'out' went wrong.");
                ret = -EIO;
                goto unlock;
        }

        msleep(msec);

        if (usb_control_msg(d->udev,
                        usb_rcvctrlpipe(d->udev,0),
                        TH_COMMAND_IN, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
                        buf, 12, 2000) != 12) {
                err("USB control message 'in' went wrong.");
                ret = -EIO;
                goto unlock;
        }

        deb_xfer("in buffer: ");
        debug_dump(buf, 12, deb_xfer);

        if (in != NULL && inlen > 0)
                memcpy(in, &buf[1], inlen);

unlock:
        mutex_unlock(&d->usb_mutex);

        return ret;
}

u8 vp7045_read_reg(struct dvb_usb_device *d, u8 reg)
{
        u8 obuf[2] = { 0 },v;
        obuf[1] = reg;

        vp7045_usb_op(d,TUNER_REG_READ,obuf,2,&v,1,30);

        return v;
}

static int vp7045_power_ctrl(struct dvb_usb_device *d, int onoff)
{
        u8 v = onoff;
        return vp7045_usb_op(d,SET_TUNER_POWER,&v,1,NULL,0,150);
}

static int vp7045_rc_query(struct dvb_usb_device *d)
{
        int ret;
        u8 key;

        ret = vp7045_usb_op(d, RC_VAL_READ, NULL, 0, &key, 1, 20);
        if (ret)
                return ret;

        deb_rc("remote query key: %x\n", key);

        if (key != 0x44) {
                /*
                 * The 8 bit address isn't available, but since the remote uses
                 * address 0 we'll use that. nec repeats are ignored too, even
                 * though the remote sends them.
                 */
                rc_keydown(d->rc_dev, RC_PROTO_NEC, RC_SCANCODE_NEC(0, key), 0);
        }

        return 0;
}

static int vp7045_read_eeprom(struct dvb_usb_device *d,u8 *buf, int len, int offset)
{
        int i, ret;
        u8 v, br[2];
        for (i=0; i < len; i++) {
                v = offset + i;
                ret = vp7045_usb_op(d, GET_EE_VALUE, &v, 1, br, 2, 5);
                if (ret)
                        return ret;

                buf[i] = br[1];
        }
        deb_info("VP7045 EEPROM read (offs: %d, len: %d) : ", offset, i);
        debug_dump(buf, i, deb_info);
        return 0;
}

static int vp7045_read_mac_addr(struct dvb_usb_device *d,u8 mac[6])
{
        return vp7045_read_eeprom(d,mac, 6, MAC_0_ADDR);
}

static int vp7045_frontend_attach(struct dvb_usb_adapter *adap)
{
        u8 buf[255] = { 0 };

        vp7045_usb_op(adap->dev,VENDOR_STRING_READ,NULL,0,buf,20,0);
        buf[10] = '\0';
        deb_info("firmware says: %s ",buf);

        vp7045_usb_op(adap->dev,PRODUCT_STRING_READ,NULL,0,buf,20,0);
        buf[10] = '\0';
        deb_info("%s ",buf);

        vp7045_usb_op(adap->dev,FW_VERSION_READ,NULL,0,buf,20,0);
        buf[10] = '\0';
        deb_info("v%s\n",buf);

/*      Dump the EEPROM */
/*      vp7045_read_eeprom(d,buf, 255, FX2_ID_ADDR); */

        adap->fe_adap[0].fe = vp7045_fe_attach(adap->dev);

        return 0;
}

static struct dvb_usb_device_properties vp7045_properties;

static int vp7045_usb_probe(struct usb_interface *intf,
                const struct usb_device_id *id)
{
        return dvb_usb_device_init(intf, &vp7045_properties,
                                   THIS_MODULE, NULL, adapter_nr);
}

enum {
        VISIONPLUS_VP7045_COLD,
        VISIONPLUS_VP7045_WARM,
        VISIONPLUS_TINYUSB2_COLD,
        VISIONPLUS_TINYUSB2_WARM,
};

static const struct usb_device_id vp7045_usb_table[] = {
        DVB_USB_DEV(VISIONPLUS, VISIONPLUS_VP7045_COLD),
        DVB_USB_DEV(VISIONPLUS, VISIONPLUS_VP7045_WARM),
        DVB_USB_DEV(VISIONPLUS, VISIONPLUS_TINYUSB2_COLD),
        DVB_USB_DEV(VISIONPLUS, VISIONPLUS_TINYUSB2_WARM),
        { }
};

MODULE_DEVICE_TABLE(usb, vp7045_usb_table);

static struct dvb_usb_device_properties vp7045_properties = {
        .usb_ctrl = CYPRESS_FX2,
        .firmware = "dvb-usb-vp7045-01.fw",
        .size_of_priv = 20,

        .num_adapters = 1,
        .adapter = {
                {
                .num_frontends = 1,
                .fe = {{
                        .frontend_attach  = vp7045_frontend_attach,
                        /* parameter for the MPEG2-data transfer */
                        .stream = {
                                .type = USB_BULK,
                                .count = 7,
                                .endpoint = 0x02,
                                .u = {
                                        .bulk = {
                                                .buffersize = 4096,
                                        }
                                }
                        },
                }},
                }
        },
        .power_ctrl       = vp7045_power_ctrl,
        .read_mac_address = vp7045_read_mac_addr,

        .rc.core = {
                .rc_interval    = 400,
                .rc_codes       = RC_MAP_TWINHAN_VP1027_DVBS,
                .module_name    = KBUILD_MODNAME,
                .rc_query       = vp7045_rc_query,
                .allowed_protos = RC_PROTO_BIT_NEC,
                .scancode_mask  = 0xff,
        },

        .num_device_descs = 2,
        .devices = {
                { .name = "Twinhan USB2.0 DVB-T receiver (TwinhanDTV Alpha/MagicBox II)",
                  .cold_ids = { &vp7045_usb_table[VISIONPLUS_VP7045_COLD], NULL },
                  .warm_ids = { &vp7045_usb_table[VISIONPLUS_VP7045_WARM], NULL },
                },
                { .name = "DigitalNow TinyUSB 2 DVB-t Receiver",
                  .cold_ids = { &vp7045_usb_table[VISIONPLUS_TINYUSB2_COLD], NULL },
                  .warm_ids = { &vp7045_usb_table[VISIONPLUS_TINYUSB2_WARM], NULL },
                },
                { NULL },
        }
};

/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver vp7045_usb_driver = {
        .name           = "dvb_usb_vp7045",
        .probe          = vp7045_usb_probe,
        .disconnect     = dvb_usb_device_exit,
        .id_table       = vp7045_usb_table,
};

module_usb_driver(vp7045_usb_driver);

MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
MODULE_DESCRIPTION("Driver for Twinhan MagicBox/Alpha and DNTV tinyUSB2 DVB-T USB2.0");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");