drivers/media/usb/dvb-usb/dibusb-common.c

   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/media/dvb-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
  14 static int debug;
  15 module_param(debug, int, 0644);
  16 MODULE_PARM_DESC(debug, "set debugging level (1=info (|-able))." DVB_USB_DEBUG_STATUS);
  17 MODULE_LICENSE("GPL");
  18
  19 #define deb_info(args...) dprintk(debug,0x01,args)
  20
  21 /* common stuff used by the different dibusb modules */
  22 int 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 }
  34 EXPORT_SYMBOL(dibusb_streaming_ctrl);
  35
  36 int 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 }
  46 EXPORT_SYMBOL(dibusb_pid_filter);
  47
  48 int 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 }
  58 EXPORT_SYMBOL(dibusb_pid_filter_ctrl);
  59
  60 int 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 }
  81 EXPORT_SYMBOL(dibusb_power_ctrl);
  82
  83 int 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
 107 ret:
 108         kfree(b);
 109         return ret;
 110 }
 111 EXPORT_SYMBOL(dibusb2_0_streaming_ctrl);
 112
 113 int 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 }
 135 EXPORT_SYMBOL(dibusb2_0_power_ctrl);
 136
 137 static 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
 170 ret:
 171         kfree(sndbuf);
 172         return ret;
 173 }
 174
 175 /*
 176  * I2C master xfer function
 177  */
 178 static 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
 210 static u32 dibusb_i2c_func(struct i2c_adapter *adapter)
 211 {
 212         return I2C_FUNC_I2C;
 213 }
 214
 215 struct i2c_algorithm dibusb_i2c_algo = {
 216         .master_xfer   = dibusb_i2c_xfer,
 217         .functionality = dibusb_i2c_func,
 218 };
 219 EXPORT_SYMBOL(dibusb_i2c_algo);
 220
 221 int 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 }
 238 EXPORT_SYMBOL(dibusb_read_eeprom_byte);
 239
 240 /*
 241  * common remote control stuff
 242  */
 243 struct 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 };
 372 EXPORT_SYMBOL(rc_map_dibusb_table);
 373
 374 int 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
 394 ret:
 395         kfree(buf);
 396
 397         return ret;
 398 }
 399 EXPORT_SYMBOL(dibusb_rc_query);