drivers/media/usb/dvb-usb/digitv.c

   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 */
  17 static int dvb_usb_digitv_debug;
  18 module_param_named(debug,dvb_usb_digitv_debug, int, 0644);
  19 MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
  20
  21 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  22
  23 #define deb_rc(args...)   dprintk(dvb_usb_digitv_debug,0x01,args)
  24
  25 static 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 */
  54 static 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                 if (msg[i].len < 1) {
  67                         i = -EOPNOTSUPP;
  68                         break;
  69                 }
  70                 /* write/read request */
  71                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
  72                         if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
  73                                                 msg[i+1].buf,msg[i+1].len) < 0)
  74                                 break;
  75                         i++;
  76                 } else
  77                         if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
  78                                                 &msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
  79                                 break;
  80         }
  81
  82         mutex_unlock(&d->i2c_mutex);
  83         return i;
  84 }
  85
  86 static u32 digitv_i2c_func(struct i2c_adapter *adapter)
  87 {
  88         return I2C_FUNC_I2C;
  89 }
  90
  91 static struct i2c_algorithm digitv_i2c_algo = {
  92         .master_xfer   = digitv_i2c_xfer,
  93         .functionality = digitv_i2c_func,
  94 };
  95
  96 /* Callbacks for DVB USB */
  97 static int digitv_identify_state(struct usb_device *udev,
  98                                  const struct dvb_usb_device_properties *props,
  99                                  const struct dvb_usb_device_description **desc,
 100                                  int *cold)
 101 {
 102         *cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
 103         return 0;
 104 }
 105
 106 static int digitv_mt352_demod_init(struct dvb_frontend *fe)
 107 {
 108         static u8 reset_buf[] = { 0x89, 0x38,  0x8a, 0x2d, 0x50, 0x80 };
 109         static u8 init_buf[] = { 0x68, 0xa0,  0x8e, 0x40,  0x53, 0x50,
 110                         0x67, 0x20,  0x7d, 0x01,  0x7c, 0x00,  0x7a, 0x00,
 111                         0x79, 0x20,  0x57, 0x05,  0x56, 0x31,  0x88, 0x0f,
 112                         0x75, 0x32 };
 113         int i;
 114
 115         for (i = 0; i < ARRAY_SIZE(reset_buf); i += 2)
 116                 mt352_write(fe, &reset_buf[i], 2);
 117
 118         msleep(1);
 119
 120         for (i = 0; i < ARRAY_SIZE(init_buf); i += 2)
 121                 mt352_write(fe, &init_buf[i], 2);
 122
 123         return 0;
 124 }
 125
 126 static struct mt352_config digitv_mt352_config = {
 127         .demod_init = digitv_mt352_demod_init,
 128 };
 129
 130 static int digitv_nxt6000_tuner_set_params(struct dvb_frontend *fe)
 131 {
 132         struct dvb_usb_adapter *adap = fe->dvb->priv;
 133         u8 b[5];
 134
 135         fe->ops.tuner_ops.calc_regs(fe, b, sizeof(b));
 136         if (fe->ops.i2c_gate_ctrl)
 137                 fe->ops.i2c_gate_ctrl(fe, 1);
 138         return digitv_ctrl_msg(adap->dev, USB_WRITE_TUNER, 0, &b[1], 4, NULL, 0);
 139 }
 140
 141 static struct nxt6000_config digitv_nxt6000_config = {
 142         .clock_inversion = 1,
 143 };
 144
 145 static int digitv_frontend_attach(struct dvb_usb_adapter *adap)
 146 {
 147         struct digitv_state *st = adap->dev->priv;
 148
 149         adap->fe_adap[0].fe = dvb_attach(mt352_attach, &digitv_mt352_config,
 150                                          &adap->dev->i2c_adap);
 151         if ((adap->fe_adap[0].fe) != NULL) {
 152                 st->is_nxt6000 = 0;
 153                 return 0;
 154         }
 155         adap->fe_adap[0].fe = dvb_attach(nxt6000_attach,
 156                                          &digitv_nxt6000_config,
 157                                          &adap->dev->i2c_adap);
 158         if ((adap->fe_adap[0].fe) != NULL) {
 159                 st->is_nxt6000 = 1;
 160                 return 0;
 161         }
 162         return -EIO;
 163 }
 164
 165 static int digitv_tuner_attach(struct dvb_usb_adapter *adap)
 166 {
 167         struct digitv_state *st = adap->dev->priv;
 168
 169         if (!dvb_attach(dvb_pll_attach, adap->fe_adap[0].fe, 0x60, NULL, DVB_PLL_TDED4))
 170                 return -ENODEV;
 171
 172         if (st->is_nxt6000)
 173                 adap->fe_adap[0].fe->ops.tuner_ops.set_params = digitv_nxt6000_tuner_set_params;
 174
 175         return 0;
 176 }
 177
 178 static struct rc_map_table rc_map_digitv_table[] = {
 179         { 0x5f55, KEY_0 },
 180         { 0x6f55, KEY_1 },
 181         { 0x9f55, KEY_2 },
 182         { 0xaf55, KEY_3 },
 183         { 0x5f56, KEY_4 },
 184         { 0x6f56, KEY_5 },
 185         { 0x9f56, KEY_6 },
 186         { 0xaf56, KEY_7 },
 187         { 0x5f59, KEY_8 },
 188         { 0x6f59, KEY_9 },
 189         { 0x9f59, KEY_TV },
 190         { 0xaf59, KEY_AUX },
 191         { 0x5f5a, KEY_DVD },
 192         { 0x6f5a, KEY_POWER },
 193         { 0x9f5a, KEY_CAMERA },     /* labelled 'Picture' */
 194         { 0xaf5a, KEY_AUDIO },
 195         { 0x5f65, KEY_INFO },
 196         { 0x6f65, KEY_F13 },     /* 16:9 */
 197         { 0x9f65, KEY_F14 },     /* 14:9 */
 198         { 0xaf65, KEY_EPG },
 199         { 0x5f66, KEY_EXIT },
 200         { 0x6f66, KEY_MENU },
 201         { 0x9f66, KEY_UP },
 202         { 0xaf66, KEY_DOWN },
 203         { 0x5f69, KEY_LEFT },
 204         { 0x6f69, KEY_RIGHT },
 205         { 0x9f69, KEY_ENTER },
 206         { 0xaf69, KEY_CHANNELUP },
 207         { 0x5f6a, KEY_CHANNELDOWN },
 208         { 0x6f6a, KEY_VOLUMEUP },
 209         { 0x9f6a, KEY_VOLUMEDOWN },
 210         { 0xaf6a, KEY_RED },
 211         { 0x5f95, KEY_GREEN },
 212         { 0x6f95, KEY_YELLOW },
 213         { 0x9f95, KEY_BLUE },
 214         { 0xaf95, KEY_SUBTITLE },
 215         { 0x5f96, KEY_F15 },     /* AD */
 216         { 0x6f96, KEY_TEXT },
 217         { 0x9f96, KEY_MUTE },
 218         { 0xaf96, KEY_REWIND },
 219         { 0x5f99, KEY_STOP },
 220         { 0x6f99, KEY_PLAY },
 221         { 0x9f99, KEY_FASTFORWARD },
 222         { 0xaf99, KEY_F16 },     /* chapter */
 223         { 0x5f9a, KEY_PAUSE },
 224         { 0x6f9a, KEY_PLAY },
 225         { 0x9f9a, KEY_RECORD },
 226         { 0xaf9a, KEY_F17 },     /* picture in picture */
 227         { 0x5fa5, KEY_KPPLUS },  /* zoom in */
 228         { 0x6fa5, KEY_KPMINUS }, /* zoom out */
 229         { 0x9fa5, KEY_F18 },     /* capture */
 230         { 0xafa5, KEY_F19 },     /* web */
 231         { 0x5fa6, KEY_EMAIL },
 232         { 0x6fa6, KEY_PHONE },
 233         { 0x9fa6, KEY_PC },
 234 };
 235
 236 static int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 237 {
 238         struct rc_map_table *entry;
 239         int ret, i;
 240         u8 key[4];
 241         u8 b[4] = { 0 };
 242
 243         *event = 0;
 244         *state = REMOTE_NO_KEY_PRESSED;
 245
 246         ret = digitv_ctrl_msg(d, USB_READ_REMOTE, 0, NULL, 0, key, 4);
 247         if (ret)
 248                 return ret;
 249
 250         /* Tell the device we've read the remote. Not sure how necessary
 251            this is, but the Nebula SDK does it. */
 252         ret = digitv_ctrl_msg(d, USB_WRITE_REMOTE, 0, b, 4, NULL, 0);
 253         if (ret)
 254                 return ret;
 255
 256         /* if something is inside the buffer, simulate key press */
 257         if (key[0] != 0) {
 258                 for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) {
 259                         entry = &d->props.rc.legacy.rc_map_table[i];
 260
 261                         if (rc5_custom(entry) == key[0] &&
 262                             rc5_data(entry) == key[1]) {
 263                                 *event = entry->keycode;
 264                                 *state = REMOTE_KEY_PRESSED;
 265                                 return 0;
 266                         }
 267                 }
 268
 269                 deb_rc("key: %*ph\n", 4, key);
 270         }
 271
 272         return 0;
 273 }
 274
 275 /* DVB USB Driver stuff */
 276 static struct dvb_usb_device_properties digitv_properties;
 277
 278 static int digitv_probe(struct usb_interface *intf,
 279                 const struct usb_device_id *id)
 280 {
 281         struct dvb_usb_device *d;
 282         int ret = dvb_usb_device_init(intf, &digitv_properties, THIS_MODULE, &d,
 283                                       adapter_nr);
 284         if (ret == 0) {
 285                 u8 b[4] = { 0 };
 286
 287                 if (d != NULL) { /* do that only when the firmware is loaded */
 288                         b[0] = 1;
 289                         digitv_ctrl_msg(d,USB_WRITE_REMOTE_TYPE,0,b,4,NULL,0);
 290
 291                         b[0] = 0;
 292                         digitv_ctrl_msg(d,USB_WRITE_REMOTE,0,b,4,NULL,0);
 293                 }
 294         }
 295         return ret;
 296 }
 297
 298 enum {
 299         ANCHOR_NEBULA_DIGITV,
 300 };
 301
 302 static struct usb_device_id digitv_table[] = {
 303         DVB_USB_DEV(ANCHOR, ANCHOR_NEBULA_DIGITV),
 304         { }
 305 };
 306
 307 MODULE_DEVICE_TABLE (usb, digitv_table);
 308
 309 static struct dvb_usb_device_properties digitv_properties = {
 310         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
 311
 312         .usb_ctrl = CYPRESS_FX2,
 313         .firmware = "/*(DEBLOBBED)*/",
 314
 315         .size_of_priv = sizeof(struct digitv_state),
 316
 317         .num_adapters = 1,
 318         .adapter = {
 319                 {
 320                 .num_frontends = 1,
 321                 .fe = {{
 322                         .frontend_attach  = digitv_frontend_attach,
 323                         .tuner_attach     = digitv_tuner_attach,
 324
 325                         /* parameter for the MPEG2-data transfer */
 326                         .stream = {
 327                                 .type = USB_BULK,
 328                                 .count = 7,
 329                                 .endpoint = 0x02,
 330                                 .u = {
 331                                         .bulk = {
 332                                                 .buffersize = 4096,
 333                                         }
 334                                 }
 335                         },
 336                 }},
 337                 }
 338         },
 339         .identify_state   = digitv_identify_state,
 340
 341         .rc.legacy = {
 342                 .rc_interval      = 1000,
 343                 .rc_map_table     = rc_map_digitv_table,
 344                 .rc_map_size      = ARRAY_SIZE(rc_map_digitv_table),
 345                 .rc_query         = digitv_rc_query,
 346         },
 347
 348         .i2c_algo         = &digitv_i2c_algo,
 349
 350         .generic_bulk_ctrl_endpoint = 0x01,
 351
 352         .num_device_descs = 1,
 353         .devices = {
 354                 {   "Nebula Electronics uDigiTV DVB-T USB2.0)",
 355                         { &digitv_table[ANCHOR_NEBULA_DIGITV], NULL },
 356                         { NULL },
 357                 },
 358                 { NULL },
 359         }
 360 };
 361
 362 static struct usb_driver digitv_driver = {
 363         .name           = "dvb_usb_digitv",
 364         .probe          = digitv_probe,
 365         .disconnect = dvb_usb_device_exit,
 366         .id_table       = digitv_table,
 367 };
 368
 369 module_usb_driver(digitv_driver);
 370
 371 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
 372 MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
 373 MODULE_VERSION("1.0-alpha");
 374 MODULE_LICENSE("GPL");