linux/drivers/media/usb/dvb-usb/digitv.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/* DVB USB compliant linux driver for Nebula Electronics uDigiTV DVB-T USB2.0
   3 * receiver
   4 *
   5 * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@posteo.de)
   6 *
   7 * partly based on the SDK published by Nebula Electronics
   8 *
   9 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
  10 */
  11#include "digitv.h"
  12
  13#include "mt352.h"
  14#include "nxt6000.h"
  15
  16/* debug */
  17static int dvb_usb_digitv_debug;
  18module_param_named(debug,dvb_usb_digitv_debug, int, 0644);
  19MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
  20
  21DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  22
  23#define deb_rc(args...)   dprintk(dvb_usb_digitv_debug,0x01,args)
  24
  25static int digitv_ctrl_msg(struct dvb_usb_device *d,
  26                u8 cmd, u8 vv, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
  27{
  28        struct digitv_state *st = d->priv;
  29        int ret, wo;
  30
  31        wo = (rbuf == NULL || rlen == 0); /* write-only */
  32
  33        if (wlen > 4 || rlen > 4)
  34                return -EIO;
  35
  36        memset(st->sndbuf, 0, 7);
  37        memset(st->rcvbuf, 0, 7);
  38
  39        st->sndbuf[0] = cmd;
  40        st->sndbuf[1] = vv;
  41        st->sndbuf[2] = wo ? wlen : rlen;
  42
  43        if (wo) {
  44                memcpy(&st->sndbuf[3], wbuf, wlen);
  45                ret = dvb_usb_generic_write(d, st->sndbuf, 7);
  46        } else {
  47                ret = dvb_usb_generic_rw(d, st->sndbuf, 7, st->rcvbuf, 7, 10);
  48                memcpy(rbuf, &st->rcvbuf[3], rlen);
  49        }
  50        return ret;
  51}
  52
  53/* I2C */
  54static int digitv_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
  55{
  56        struct dvb_usb_device *d = i2c_get_adapdata(adap);
  57        int i;
  58
  59        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
  60                return -EAGAIN;
  61
  62        if (num > 2)
  63                warn("more than 2 i2c messages at a time is not handled yet. TODO.");
  64
  65        for (i = 0; i < num; i++) {
  66                /* write/read request */
  67                if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  68                        if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
  69                                                msg[i+1].buf,msg[i+1].len) < 0)
  70                                break;
  71                        i++;
  72                } else
  73                        if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
  74                                                &msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
  75                                break;
  76        }
  77
  78        mutex_unlock(&d->i2c_mutex);
  79        return i;
  80}
  81
  82static u32 digitv_i2c_func(struct i2c_adapter *adapter)
  83{
  84        return I2C_FUNC_I2C;
  85}
  86
  87static struct i2c_algorithm digitv_i2c_algo = {
  88        .master_xfer   = digitv_i2c_xfer,
  89        .functionality = digitv_i2c_func,
  90};
  91
  92/* Callbacks for DVB USB */
  93static int digitv_identify_state(struct usb_device *udev,
  94                                 const struct dvb_usb_device_properties *props,
  95                                 const struct dvb_usb_device_description **desc,
  96                                 int *cold)
  97{
  98        *cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
  99        return 0;
 100}
 101
 102static int digitv_mt352_demod_init(struct dvb_frontend *fe)
 103{
 104        static u8 reset_buf[] = { 0x89, 0x38,  0x8a, 0x2d, 0x50, 0x80 };
 105        static u8 init_buf[] = { 0x68, 0xa0,  0x8e, 0x40,  0x53, 0x50,
 106                        0x67, 0x20,  0x7d, 0x01,  0x7c, 0x00,  0x7a, 0x00,
 107                        0x79, 0x20,  0x57, 0x05,  0x56, 0x31,  0x88, 0x0f,
 108                        0x75, 0x32 };
 109        int i;
 110
 111        for (i = 0; i < ARRAY_SIZE(reset_buf); i += 2)
 112                mt352_write(fe, &reset_buf[i], 2);
 113
 114        msleep(1);
 115
 116        for (i = 0; i < ARRAY_SIZE(init_buf); i += 2)
 117                mt352_write(fe, &init_buf[i], 2);
 118
 119        return 0;
 120}
 121
 122static struct mt352_config digitv_mt352_config = {
 123        .demod_init = digitv_mt352_demod_init,
 124};
 125
 126static int digitv_nxt6000_tuner_set_params(struct dvb_frontend *fe)
 127{
 128        struct dvb_usb_adapter *adap = fe->dvb->priv;
 129        u8 b[5];
 130
 131        fe->ops.tuner_ops.calc_regs(fe, b, sizeof(b));
 132        if (fe->ops.i2c_gate_ctrl)
 133                fe->ops.i2c_gate_ctrl(fe, 1);
 134        return digitv_ctrl_msg(adap->dev, USB_WRITE_TUNER, 0, &b[1], 4, NULL, 0);
 135}
 136
 137static struct nxt6000_config digitv_nxt6000_config = {
 138        .clock_inversion = 1,
 139};
 140
 141static int digitv_frontend_attach(struct dvb_usb_adapter *adap)
 142{
 143        struct digitv_state *st = adap->dev->priv;
 144
 145        adap->fe_adap[0].fe = dvb_attach(mt352_attach, &digitv_mt352_config,
 146                                         &adap->dev->i2c_adap);
 147        if ((adap->fe_adap[0].fe) != NULL) {
 148                st->is_nxt6000 = 0;
 149                return 0;
 150        }
 151        adap->fe_adap[0].fe = dvb_attach(nxt6000_attach,
 152                                         &digitv_nxt6000_config,
 153                                         &adap->dev->i2c_adap);
 154        if ((adap->fe_adap[0].fe) != NULL) {
 155                st->is_nxt6000 = 1;
 156                return 0;
 157        }
 158        return -EIO;
 159}
 160
 161static int digitv_tuner_attach(struct dvb_usb_adapter *adap)
 162{
 163        struct digitv_state *st = adap->dev->priv;
 164
 165        if (!dvb_attach(dvb_pll_attach, adap->fe_adap[0].fe, 0x60, NULL, DVB_PLL_TDED4))
 166                return -ENODEV;
 167
 168        if (st->is_nxt6000)
 169                adap->fe_adap[0].fe->ops.tuner_ops.set_params = digitv_nxt6000_tuner_set_params;
 170
 171        return 0;
 172}
 173
 174static struct rc_map_table rc_map_digitv_table[] = {
 175        { 0x5f55, KEY_0 },
 176        { 0x6f55, KEY_1 },
 177        { 0x9f55, KEY_2 },
 178        { 0xaf55, KEY_3 },
 179        { 0x5f56, KEY_4 },
 180        { 0x6f56, KEY_5 },
 181        { 0x9f56, KEY_6 },
 182        { 0xaf56, KEY_7 },
 183        { 0x5f59, KEY_8 },
 184        { 0x6f59, KEY_9 },
 185        { 0x9f59, KEY_TV },
 186        { 0xaf59, KEY_AUX },
 187        { 0x5f5a, KEY_DVD },
 188        { 0x6f5a, KEY_POWER },
 189        { 0x9f5a, KEY_CAMERA },     /* labelled 'Picture' */
 190        { 0xaf5a, KEY_AUDIO },
 191        { 0x5f65, KEY_INFO },
 192        { 0x6f65, KEY_F13 },     /* 16:9 */
 193        { 0x9f65, KEY_F14 },     /* 14:9 */
 194        { 0xaf65, KEY_EPG },
 195        { 0x5f66, KEY_EXIT },
 196        { 0x6f66, KEY_MENU },
 197        { 0x9f66, KEY_UP },
 198        { 0xaf66, KEY_DOWN },
 199        { 0x5f69, KEY_LEFT },
 200        { 0x6f69, KEY_RIGHT },
 201        { 0x9f69, KEY_ENTER },
 202        { 0xaf69, KEY_CHANNELUP },
 203        { 0x5f6a, KEY_CHANNELDOWN },
 204        { 0x6f6a, KEY_VOLUMEUP },
 205        { 0x9f6a, KEY_VOLUMEDOWN },
 206        { 0xaf6a, KEY_RED },
 207        { 0x5f95, KEY_GREEN },
 208        { 0x6f95, KEY_YELLOW },
 209        { 0x9f95, KEY_BLUE },
 210        { 0xaf95, KEY_SUBTITLE },
 211        { 0x5f96, KEY_F15 },     /* AD */
 212        { 0x6f96, KEY_TEXT },
 213        { 0x9f96, KEY_MUTE },
 214        { 0xaf96, KEY_REWIND },
 215        { 0x5f99, KEY_STOP },
 216        { 0x6f99, KEY_PLAY },
 217        { 0x9f99, KEY_FASTFORWARD },
 218        { 0xaf99, KEY_F16 },     /* chapter */
 219        { 0x5f9a, KEY_PAUSE },
 220        { 0x6f9a, KEY_PLAY },
 221        { 0x9f9a, KEY_RECORD },
 222        { 0xaf9a, KEY_F17 },     /* picture in picture */
 223        { 0x5fa5, KEY_KPPLUS },  /* zoom in */
 224        { 0x6fa5, KEY_KPMINUS }, /* zoom out */
 225        { 0x9fa5, KEY_F18 },     /* capture */
 226        { 0xafa5, KEY_F19 },     /* web */
 227        { 0x5fa6, KEY_EMAIL },
 228        { 0x6fa6, KEY_PHONE },
 229        { 0x9fa6, KEY_PC },
 230};
 231
 232static int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 233{
 234        struct rc_map_table *entry;
 235        int ret, i;
 236        u8 key[4];
 237        u8 b[4] = { 0 };
 238
 239        *event = 0;
 240        *state = REMOTE_NO_KEY_PRESSED;
 241
 242        ret = digitv_ctrl_msg(d, USB_READ_REMOTE, 0, NULL, 0, key, 4);
 243        if (ret)
 244                return ret;
 245
 246        /* Tell the device we've read the remote. Not sure how necessary
 247           this is, but the Nebula SDK does it. */
 248        ret = digitv_ctrl_msg(d, USB_WRITE_REMOTE, 0, b, 4, NULL, 0);
 249        if (ret)
 250                return ret;
 251
 252        /* if something is inside the buffer, simulate key press */
 253        if (key[0] != 0) {
 254                for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) {
 255                        entry = &d->props.rc.legacy.rc_map_table[i];
 256
 257                        if (rc5_custom(entry) == key[0] &&
 258                            rc5_data(entry) == key[1]) {
 259                                *event = entry->keycode;
 260                                *state = REMOTE_KEY_PRESSED;
 261                                return 0;
 262                        }
 263                }
 264
 265                deb_rc("key: %*ph\n", 4, key);
 266        }
 267
 268        return 0;
 269}
 270
 271/* DVB USB Driver stuff */
 272static struct dvb_usb_device_properties digitv_properties;
 273
 274static int digitv_probe(struct usb_interface *intf,
 275                const struct usb_device_id *id)
 276{
 277        struct dvb_usb_device *d;
 278        int ret = dvb_usb_device_init(intf, &digitv_properties, THIS_MODULE, &d,
 279                                      adapter_nr);
 280        if (ret == 0) {
 281                u8 b[4] = { 0 };
 282
 283                if (d != NULL) { /* do that only when the firmware is loaded */
 284                        b[0] = 1;
 285                        digitv_ctrl_msg(d,USB_WRITE_REMOTE_TYPE,0,b,4,NULL,0);
 286
 287                        b[0] = 0;
 288                        digitv_ctrl_msg(d,USB_WRITE_REMOTE,0,b,4,NULL,0);
 289                }
 290        }
 291        return ret;
 292}
 293
 294static struct usb_device_id digitv_table [] = {
 295                { USB_DEVICE(USB_VID_ANCHOR, USB_PID_NEBULA_DIGITV) },
 296                { }             /* Terminating entry */
 297};
 298MODULE_DEVICE_TABLE (usb, digitv_table);
 299
 300static struct dvb_usb_device_properties digitv_properties = {
 301        .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 302
 303        .usb_ctrl = CYPRESS_FX2,
 304        .firmware = "dvb-usb-digitv-02.fw",
 305
 306        .size_of_priv = sizeof(struct digitv_state),
 307
 308        .num_adapters = 1,
 309        .adapter = {
 310                {
 311                .num_frontends = 1,
 312                .fe = {{
 313                        .frontend_attach  = digitv_frontend_attach,
 314                        .tuner_attach     = digitv_tuner_attach,
 315
 316                        /* parameter for the MPEG2-data transfer */
 317                        .stream = {
 318                                .type = USB_BULK,
 319                                .count = 7,
 320                                .endpoint = 0x02,
 321                                .u = {
 322                                        .bulk = {
 323                                                .buffersize = 4096,
 324                                        }
 325                                }
 326                        },
 327                }},
 328                }
 329        },
 330        .identify_state   = digitv_identify_state,
 331
 332        .rc.legacy = {
 333                .rc_interval      = 1000,
 334                .rc_map_table     = rc_map_digitv_table,
 335                .rc_map_size      = ARRAY_SIZE(rc_map_digitv_table),
 336                .rc_query         = digitv_rc_query,
 337        },
 338
 339        .i2c_algo         = &digitv_i2c_algo,
 340
 341        .generic_bulk_ctrl_endpoint = 0x01,
 342
 343        .num_device_descs = 1,
 344        .devices = {
 345                {   "Nebula Electronics uDigiTV DVB-T USB2.0)",
 346                        { &digitv_table[0], NULL },
 347                        { NULL },
 348                },
 349                { NULL },
 350        }
 351};
 352
 353static struct usb_driver digitv_driver = {
 354        .name           = "dvb_usb_digitv",
 355        .probe          = digitv_probe,
 356        .disconnect = dvb_usb_device_exit,
 357        .id_table       = digitv_table,
 358};
 359
 360module_usb_driver(digitv_driver);
 361
 362MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
 363MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
 364MODULE_VERSION("1.0-alpha");
 365MODULE_LICENSE("GPL");
 366