linux/drivers/media/usb/dvb-usb/dibusb-common.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/* Common methods for dibusb-based-receivers.
   3 *
   4 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
   5 *
   6 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
   7 */
   8
   9#include "dibusb.h"
  10
  11/* Max transfer size done by I2C transfer functions */
  12#define MAX_XFER_SIZE  64
  13
  14static int debug;
  15module_param(debug, int, 0644);
  16MODULE_PARM_DESC(debug, "set debugging level (1=info (|-able))." DVB_USB_DEBUG_STATUS);
  17MODULE_LICENSE("GPL");
  18
  19#define deb_info(args...) dprintk(debug,0x01,args)
  20
  21/* common stuff used by the different dibusb modules */
  22int dibusb_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
  23{
  24        if (adap->priv != NULL) {
  25                struct dibusb_state *st = adap->priv;
  26                if (st->ops.fifo_ctrl != NULL)
  27                        if (st->ops.fifo_ctrl(adap->fe_adap[0].fe, onoff)) {
  28                                err("error while controlling the fifo of the demod.");
  29                                return -ENODEV;
  30                        }
  31        }
  32        return 0;
  33}
  34EXPORT_SYMBOL(dibusb_streaming_ctrl);
  35
  36int dibusb_pid_filter(struct dvb_usb_adapter *adap, int index, u16 pid, int onoff)
  37{
  38        if (adap->priv != NULL) {
  39                struct dibusb_state *st = adap->priv;
  40                if (st->ops.pid_ctrl != NULL)
  41                        st->ops.pid_ctrl(adap->fe_adap[0].fe,
  42                                         index, pid, onoff);
  43        }
  44        return 0;
  45}
  46EXPORT_SYMBOL(dibusb_pid_filter);
  47
  48int dibusb_pid_filter_ctrl(struct dvb_usb_adapter *adap, int onoff)
  49{
  50        if (adap->priv != NULL) {
  51                struct dibusb_state *st = adap->priv;
  52                if (st->ops.pid_parse != NULL)
  53                        if (st->ops.pid_parse(adap->fe_adap[0].fe, onoff) < 0)
  54                                err("could not handle pid_parser");
  55        }
  56        return 0;
  57}
  58EXPORT_SYMBOL(dibusb_pid_filter_ctrl);
  59
  60int dibusb_power_ctrl(struct dvb_usb_device *d, int onoff)
  61{
  62        u8 *b;
  63        int ret;
  64
  65        b = kmalloc(3, GFP_KERNEL);
  66        if (!b)
  67                return -ENOMEM;
  68
  69        b[0] = DIBUSB_REQ_SET_IOCTL;
  70        b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
  71        b[2] = onoff ? DIBUSB_IOCTL_POWER_WAKEUP : DIBUSB_IOCTL_POWER_SLEEP;
  72
  73        ret = dvb_usb_generic_write(d, b, 3);
  74
  75        kfree(b);
  76
  77        msleep(10);
  78
  79        return ret;
  80}
  81EXPORT_SYMBOL(dibusb_power_ctrl);
  82
  83int dibusb2_0_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
  84{
  85        int ret;
  86        u8 *b;
  87
  88        b = kmalloc(3, GFP_KERNEL);
  89        if (!b)
  90                return -ENOMEM;
  91
  92        if ((ret = dibusb_streaming_ctrl(adap,onoff)) < 0)
  93                goto ret;
  94
  95        if (onoff) {
  96                b[0] = DIBUSB_REQ_SET_STREAMING_MODE;
  97                b[1] = 0x00;
  98                ret = dvb_usb_generic_write(adap->dev, b, 2);
  99                if (ret  < 0)
 100                        goto ret;
 101        }
 102
 103        b[0] = DIBUSB_REQ_SET_IOCTL;
 104        b[1] = onoff ? DIBUSB_IOCTL_CMD_ENABLE_STREAM : DIBUSB_IOCTL_CMD_DISABLE_STREAM;
 105        ret = dvb_usb_generic_write(adap->dev, b, 3);
 106
 107ret:
 108        kfree(b);
 109        return ret;
 110}
 111EXPORT_SYMBOL(dibusb2_0_streaming_ctrl);
 112
 113int dibusb2_0_power_ctrl(struct dvb_usb_device *d, int onoff)
 114{
 115        u8 *b;
 116        int ret;
 117
 118        if (!onoff)
 119                return 0;
 120
 121        b = kmalloc(3, GFP_KERNEL);
 122        if (!b)
 123                return -ENOMEM;
 124
 125        b[0] = DIBUSB_REQ_SET_IOCTL;
 126        b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
 127        b[2] = DIBUSB_IOCTL_POWER_WAKEUP;
 128
 129        ret = dvb_usb_generic_write(d, b, 3);
 130
 131        kfree(b);
 132
 133        return ret;
 134}
 135EXPORT_SYMBOL(dibusb2_0_power_ctrl);
 136
 137static int dibusb_i2c_msg(struct dvb_usb_device *d, u8 addr,
 138                          u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
 139{
 140        u8 *sndbuf;
 141        int ret, wo, len;
 142
 143        /* write only ? */
 144        wo = (rbuf == NULL || rlen == 0);
 145
 146        len = 2 + wlen + (wo ? 0 : 2);
 147
 148        sndbuf = kmalloc(MAX_XFER_SIZE, GFP_KERNEL);
 149        if (!sndbuf)
 150                return -ENOMEM;
 151
 152        if (4 + wlen > MAX_XFER_SIZE) {
 153                warn("i2c wr: len=%d is too big!\n", wlen);
 154                ret = -EOPNOTSUPP;
 155                goto ret;
 156        }
 157
 158        sndbuf[0] = wo ? DIBUSB_REQ_I2C_WRITE : DIBUSB_REQ_I2C_READ;
 159        sndbuf[1] = (addr << 1) | (wo ? 0 : 1);
 160
 161        memcpy(&sndbuf[2], wbuf, wlen);
 162
 163        if (!wo) {
 164                sndbuf[wlen + 2] = (rlen >> 8) & 0xff;
 165                sndbuf[wlen + 3] = rlen & 0xff;
 166        }
 167
 168        ret = dvb_usb_generic_rw(d, sndbuf, len, rbuf, rlen, 0);
 169
 170ret:
 171        kfree(sndbuf);
 172        return ret;
 173}
 174
 175/*
 176 * I2C master xfer function
 177 */
 178static int dibusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
 179{
 180        struct dvb_usb_device *d = i2c_get_adapdata(adap);
 181        int i;
 182
 183        if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 184                return -EAGAIN;
 185
 186        for (i = 0; i < num; i++) {
 187                /* write/read request */
 188                if (i+1 < num && (msg[i].flags & I2C_M_RD) == 0
 189                                          && (msg[i+1].flags & I2C_M_RD)) {
 190                        if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,
 191                                                msg[i+1].buf,msg[i+1].len) < 0)
 192                                break;
 193                        i++;
 194                } else if ((msg[i].flags & I2C_M_RD) == 0) {
 195                        if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,NULL,0) < 0)
 196                                break;
 197                } else if (msg[i].addr != 0x50) {
 198                        /* 0x50 is the address of the eeprom - we need to protect it
 199                         * from dibusb's bad i2c implementation: reads without
 200                         * writing the offset before are forbidden */
 201                        if (dibusb_i2c_msg(d, msg[i].addr, NULL, 0, msg[i].buf, msg[i].len) < 0)
 202                                break;
 203                }
 204        }
 205
 206        mutex_unlock(&d->i2c_mutex);
 207        return i;
 208}
 209
 210static u32 dibusb_i2c_func(struct i2c_adapter *adapter)
 211{
 212        return I2C_FUNC_I2C;
 213}
 214
 215struct i2c_algorithm dibusb_i2c_algo = {
 216        .master_xfer   = dibusb_i2c_xfer,
 217        .functionality = dibusb_i2c_func,
 218};
 219EXPORT_SYMBOL(dibusb_i2c_algo);
 220
 221int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val)
 222{
 223        u8 *buf;
 224        int rc;
 225
 226        buf = kmalloc(2, GFP_KERNEL);
 227        if (!buf)
 228                return -ENOMEM;
 229
 230        buf[0] = offs;
 231
 232        rc = dibusb_i2c_msg(d, 0x50, &buf[0], 1, &buf[1], 1);
 233        *val = buf[1];
 234        kfree(buf);
 235
 236        return rc;
 237}
 238EXPORT_SYMBOL(dibusb_read_eeprom_byte);
 239
 240/*
 241 * common remote control stuff
 242 */
 243struct rc_map_table rc_map_dibusb_table[] = {
 244        /* Key codes for the little Artec T1/Twinhan/HAMA/ remote. */
 245        { 0x0016, KEY_POWER },
 246        { 0x0010, KEY_MUTE },
 247        { 0x0003, KEY_1 },
 248        { 0x0001, KEY_2 },
 249        { 0x0006, KEY_3 },
 250        { 0x0009, KEY_4 },
 251        { 0x001d, KEY_5 },
 252        { 0x001f, KEY_6 },
 253        { 0x000d, KEY_7 },
 254        { 0x0019, KEY_8 },
 255        { 0x001b, KEY_9 },
 256        { 0x0015, KEY_0 },
 257        { 0x0005, KEY_CHANNELUP },
 258        { 0x0002, KEY_CHANNELDOWN },
 259        { 0x001e, KEY_VOLUMEUP },
 260        { 0x000a, KEY_VOLUMEDOWN },
 261        { 0x0011, KEY_RECORD },
 262        { 0x0017, KEY_FAVORITES }, /* Heart symbol - Channel list. */
 263        { 0x0014, KEY_PLAY },
 264        { 0x001a, KEY_STOP },
 265        { 0x0040, KEY_REWIND },
 266        { 0x0012, KEY_FASTFORWARD },
 267        { 0x000e, KEY_PREVIOUS }, /* Recall - Previous channel. */
 268        { 0x004c, KEY_PAUSE },
 269        { 0x004d, KEY_SCREEN }, /* Full screen mode. */
 270        { 0x0054, KEY_AUDIO }, /* MTS - Switch to secondary audio. */
 271        /* additional keys TwinHan VisionPlus, the Artec seemingly not have */
 272        { 0x000c, KEY_CANCEL }, /* Cancel */
 273        { 0x001c, KEY_EPG }, /* EPG */
 274        { 0x0000, KEY_TAB }, /* Tab */
 275        { 0x0048, KEY_INFO }, /* Preview */
 276        { 0x0004, KEY_LIST }, /* RecordList */
 277        { 0x000f, KEY_TEXT }, /* Teletext */
 278        /* Key codes for the KWorld/ADSTech/JetWay remote. */
 279        { 0x8612, KEY_POWER },
 280        { 0x860f, KEY_SELECT }, /* source */
 281        { 0x860c, KEY_UNKNOWN }, /* scan */
 282        { 0x860b, KEY_EPG },
 283        { 0x8610, KEY_MUTE },
 284        { 0x8601, KEY_1 },
 285        { 0x8602, KEY_2 },
 286        { 0x8603, KEY_3 },
 287        { 0x8604, KEY_4 },
 288        { 0x8605, KEY_5 },
 289        { 0x8606, KEY_6 },
 290        { 0x8607, KEY_7 },
 291        { 0x8608, KEY_8 },
 292        { 0x8609, KEY_9 },
 293        { 0x860a, KEY_0 },
 294        { 0x8618, KEY_ZOOM },
 295        { 0x861c, KEY_UNKNOWN }, /* preview */
 296        { 0x8613, KEY_UNKNOWN }, /* snap */
 297        { 0x8600, KEY_UNDO },
 298        { 0x861d, KEY_RECORD },
 299        { 0x860d, KEY_STOP },
 300        { 0x860e, KEY_PAUSE },
 301        { 0x8616, KEY_PLAY },
 302        { 0x8611, KEY_BACK },
 303        { 0x8619, KEY_FORWARD },
 304        { 0x8614, KEY_UNKNOWN }, /* pip */
 305        { 0x8615, KEY_ESC },
 306        { 0x861a, KEY_UP },
 307        { 0x861e, KEY_DOWN },
 308        { 0x861f, KEY_LEFT },
 309        { 0x861b, KEY_RIGHT },
 310
 311        /* Key codes for the DiBcom MOD3000 remote. */
 312        { 0x8000, KEY_MUTE },
 313        { 0x8001, KEY_TEXT },
 314        { 0x8002, KEY_HOME },
 315        { 0x8003, KEY_POWER },
 316
 317        { 0x8004, KEY_RED },
 318        { 0x8005, KEY_GREEN },
 319        { 0x8006, KEY_YELLOW },
 320        { 0x8007, KEY_BLUE },
 321
 322        { 0x8008, KEY_DVD },
 323        { 0x8009, KEY_AUDIO },
 324        { 0x800a, KEY_IMAGES },      /* Pictures */
 325        { 0x800b, KEY_VIDEO },
 326
 327        { 0x800c, KEY_BACK },
 328        { 0x800d, KEY_UP },
 329        { 0x800e, KEY_RADIO },
 330        { 0x800f, KEY_EPG },
 331
 332        { 0x8010, KEY_LEFT },
 333        { 0x8011, KEY_OK },
 334        { 0x8012, KEY_RIGHT },
 335        { 0x8013, KEY_UNKNOWN },    /* SAP */
 336
 337        { 0x8014, KEY_TV },
 338        { 0x8015, KEY_DOWN },
 339        { 0x8016, KEY_MENU },       /* DVD Menu */
 340        { 0x8017, KEY_LAST },
 341
 342        { 0x8018, KEY_RECORD },
 343        { 0x8019, KEY_STOP },
 344        { 0x801a, KEY_PAUSE },
 345        { 0x801b, KEY_PLAY },
 346
 347        { 0x801c, KEY_PREVIOUS },
 348        { 0x801d, KEY_REWIND },
 349        { 0x801e, KEY_FASTFORWARD },
 350        { 0x801f, KEY_NEXT},
 351
 352        { 0x8040, KEY_1 },
 353        { 0x8041, KEY_2 },
 354        { 0x8042, KEY_3 },
 355        { 0x8043, KEY_CHANNELUP },
 356
 357        { 0x8044, KEY_4 },
 358        { 0x8045, KEY_5 },
 359        { 0x8046, KEY_6 },
 360        { 0x8047, KEY_CHANNELDOWN },
 361
 362        { 0x8048, KEY_7 },
 363        { 0x8049, KEY_8 },
 364        { 0x804a, KEY_9 },
 365        { 0x804b, KEY_VOLUMEUP },
 366
 367        { 0x804c, KEY_CLEAR },
 368        { 0x804d, KEY_0 },
 369        { 0x804e, KEY_ENTER },
 370        { 0x804f, KEY_VOLUMEDOWN },
 371};
 372EXPORT_SYMBOL(rc_map_dibusb_table);
 373
 374int dibusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 375{
 376        u8 *buf;
 377        int ret;
 378
 379        buf = kmalloc(5, GFP_KERNEL);
 380        if (!buf)
 381                return -ENOMEM;
 382
 383        buf[0] = DIBUSB_REQ_POLL_REMOTE;
 384
 385        ret = dvb_usb_generic_rw(d, buf, 1, buf, 5, 0);
 386        if (ret < 0)
 387                goto ret;
 388
 389        dvb_usb_nec_rc_key_to_event(d, buf, event, state);
 390
 391        if (buf[0] != 0)
 392                deb_info("key: %*ph\n", 5, buf);
 393
 394ret:
 395        kfree(buf);
 396
 397        return ret;
 398}
 399EXPORT_SYMBOL(dibusb_rc_query);
 400