drivers/media/dvb/dvb-usb/dib0700_core.c

   1 /* Linux driver for devices based on the DiBcom DiB0700 USB bridge
   2  *
   3  *      This program is free software; you can redistribute it and/or modify it
   4  *      under the terms of the GNU General Public License as published by the Free
   5  *      Software Foundation, version 2.
   6  *
   7  *  Copyright (C) 2005-6 DiBcom, SA
   8  */
   9 #include "dib0700.h"
  10
  11 /* debug */
  12 int dvb_usb_dib0700_debug;
  13 module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
  14 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
  15
  16 int dvb_usb_dib0700_ir_proto = 1;
  17 module_param(dvb_usb_dib0700_ir_proto, int, 0644);
  18 MODULE_PARM_DESC(dvb_usb_dib0700_ir_proto, "set ir protocol (0=NEC, 1=RC5 (default), 2=RC6).");
  19
  20 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  21
  22
  23 int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
  24                         u32 *romversion, u32 *ramversion, u32 *fwtype)
  25 {
  26         u8 b[16];
  27         int ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
  28                                   REQUEST_GET_VERSION,
  29                                   USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
  30                                   b, sizeof(b), USB_CTRL_GET_TIMEOUT);
  31         *hwversion  = (b[0] << 24)  | (b[1] << 16)  | (b[2] << 8)  | b[3];
  32         *romversion = (b[4] << 24)  | (b[5] << 16)  | (b[6] << 8)  | b[7];
  33         *ramversion = (b[8] << 24)  | (b[9] << 16)  | (b[10] << 8) | b[11];
  34         *fwtype     = (b[12] << 24) | (b[13] << 16) | (b[14] << 8) | b[15];
  35         return ret;
  36 }
  37
  38 /* expecting rx buffer: request data[0] data[1] ... data[2] */
  39 static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
  40 {
  41         int status;
  42
  43         deb_data(">>> ");
  44         debug_dump(tx,txlen,deb_data);
  45
  46         status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
  47                 tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
  48                 USB_CTRL_GET_TIMEOUT);
  49
  50         if (status != txlen)
  51                 deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);
  52
  53         return status < 0 ? status : 0;
  54 }
  55
  56 /* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
  57 int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
  58 {
  59         u16 index, value;
  60         int status;
  61
  62         if (txlen < 2) {
  63                 err("tx buffer length is smaller than 2. Makes no sense.");
  64                 return -EINVAL;
  65         }
  66         if (txlen > 4) {
  67                 err("tx buffer length is larger than 4. Not supported.");
  68                 return -EINVAL;
  69         }
  70
  71         deb_data(">>> ");
  72         debug_dump(tx,txlen,deb_data);
  73
  74         value = ((txlen - 2) << 8) | tx[1];
  75         index = 0;
  76         if (txlen > 2)
  77                 index |= (tx[2] << 8);
  78         if (txlen > 3)
  79                 index |= tx[3];
  80
  81         status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
  82                         USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
  83                         USB_CTRL_GET_TIMEOUT);
  84
  85         if (status < 0)
  86                 deb_info("ep 0 read error (status = %d)\n",status);
  87
  88         deb_data("<<< ");
  89         debug_dump(rx,rxlen,deb_data);
  90
  91         return status; /* length in case of success */
  92 }
  93
  94 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
  95 {
  96         u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
  97         return dib0700_ctrl_wr(d,buf,3);
  98 }
  99
 100 /*
 101  * I2C master xfer function (supported in 1.20 firmware)
 102  */
 103 static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
 104                                 int num)
 105 {
 106         /* The new i2c firmware messages are more reliable and in particular
 107            properly support i2c read calls not preceded by a write */
 108
 109         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 110         uint8_t bus_mode = 1;  /* 0=eeprom bus, 1=frontend bus */
 111         uint8_t gen_mode = 0; /* 0=master i2c, 1=gpio i2c */
 112         uint8_t en_start = 0;
 113         uint8_t en_stop = 0;
 114         uint8_t buf[255]; /* TBV: malloc ? */
 115         int result, i;
 116
 117         /* Ensure nobody else hits the i2c bus while we're sending our
 118            sequence of messages, (such as the remote control thread) */
 119         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 120                 return -EAGAIN;
 121
 122         for (i = 0; i < num; i++) {
 123                 if (i == 0) {
 124                         /* First message in the transaction */
 125                         en_start = 1;
 126                 } else if (!(msg[i].flags & I2C_M_NOSTART)) {
 127                         /* Device supports repeated-start */
 128                         en_start = 1;
 129                 } else {
 130                         /* Not the first packet and device doesn't support
 131                            repeated start */
 132                         en_start = 0;
 133                 }
 134                 if (i == (num - 1)) {
 135                         /* Last message in the transaction */
 136                         en_stop = 1;
 137                 }
 138
 139                 if (msg[i].flags & I2C_M_RD) {
 140                         /* Read request */
 141                         u16 index, value;
 142                         uint8_t i2c_dest;
 143
 144                         i2c_dest = (msg[i].addr << 1);
 145                         value = ((en_start << 7) | (en_stop << 6) |
 146                                  (msg[i].len & 0x3F)) << 8 | i2c_dest;
 147                         /* I2C ctrl + FE bus; */
 148                         index = ((gen_mode<<6)&0xC0) | ((bus_mode<<4)&0x30);
 149
 150                         result = usb_control_msg(d->udev,
 151                                                  usb_rcvctrlpipe(d->udev, 0),
 152                                                  REQUEST_NEW_I2C_READ,
 153                                                  USB_TYPE_VENDOR | USB_DIR_IN,
 154                                                  value, index, msg[i].buf,
 155                                                  msg[i].len,
 156                                                  USB_CTRL_GET_TIMEOUT);
 157                         if (result < 0) {
 158                                 err("i2c read error (status = %d)\n", result);
 159                                 break;
 160                         }
 161
 162                         deb_data("<<< ");
 163                         debug_dump(msg[i].buf, msg[i].len, deb_data);
 164
 165                 } else {
 166                         /* Write request */
 167                         buf[0] = REQUEST_NEW_I2C_WRITE;
 168                         buf[1] = (msg[i].addr << 1);
 169                         buf[2] = (en_start << 7) | (en_stop << 6) |
 170                                 (msg[i].len & 0x3F);
 171                         /* I2C ctrl + FE bus; */
 172                         buf[3] = ((gen_mode<<6)&0xC0) | ((bus_mode<<4)&0x30);
 173                         /* The Actual i2c payload */
 174                         memcpy(&buf[4], msg[i].buf, msg[i].len);
 175
 176                         deb_data(">>> ");
 177                         debug_dump(buf, msg[i].len + 4, deb_data);
 178
 179                         result = usb_control_msg(d->udev,
 180                                                  usb_sndctrlpipe(d->udev, 0),
 181                                                  REQUEST_NEW_I2C_WRITE,
 182                                                  USB_TYPE_VENDOR | USB_DIR_OUT,
 183                                                  0, 0, buf, msg[i].len + 4,
 184                                                  USB_CTRL_GET_TIMEOUT);
 185                         if (result < 0) {
 186                                 err("i2c write error (status = %d)\n", result);
 187                                 break;
 188                         }
 189                 }
 190         }
 191         mutex_unlock(&d->i2c_mutex);
 192         return i;
 193 }
 194
 195 /*
 196  * I2C master xfer function (pre-1.20 firmware)
 197  */
 198 static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
 199                                    struct i2c_msg *msg, int num)
 200 {
 201         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 202         int i,len;
 203         u8 buf[255];
 204
 205         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 206                 return -EAGAIN;
 207
 208         for (i = 0; i < num; i++) {
 209                 /* fill in the address */
 210                 buf[1] = (msg[i].addr << 1);
 211                 /* fill the buffer */
 212                 memcpy(&buf[2], msg[i].buf, msg[i].len);
 213
 214                 /* write/read request */
 215                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 216                         buf[0] = REQUEST_I2C_READ;
 217                         buf[1] |= 1;
 218
 219                         /* special thing in the current firmware: when length is zero the read-failed */
 220                         if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
 221                                 deb_info("I2C read failed on address 0x%02x\n",
 222                                          msg[i].addr);
 223                                 break;
 224                         }
 225
 226                         msg[i+1].len = len;
 227
 228                         i++;
 229                 } else {
 230                         buf[0] = REQUEST_I2C_WRITE;
 231                         if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
 232                                 break;
 233                 }
 234         }
 235
 236         mutex_unlock(&d->i2c_mutex);
 237         return i;
 238 }
 239
 240 static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
 241                             int num)
 242 {
 243         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 244         struct dib0700_state *st = d->priv;
 245
 246         if (st->fw_use_new_i2c_api == 1) {
 247                 /* User running at least fw 1.20 */
 248                 return dib0700_i2c_xfer_new(adap, msg, num);
 249         } else {
 250                 /* Use legacy calls */
 251                 return dib0700_i2c_xfer_legacy(adap, msg, num);
 252         }
 253 }
 254
 255 static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
 256 {
 257         return I2C_FUNC_I2C;
 258 }
 259
 260 struct i2c_algorithm dib0700_i2c_algo = {
 261         .master_xfer   = dib0700_i2c_xfer,
 262         .functionality = dib0700_i2c_func,
 263 };
 264
 265 int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
 266                         struct dvb_usb_device_description **desc, int *cold)
 267 {
 268         u8 b[16];
 269         s16 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev,0),
 270                 REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);
 271
 272         deb_info("FW GET_VERSION length: %d\n",ret);
 273
 274         *cold = ret <= 0;
 275
 276         deb_info("cold: %d\n", *cold);
 277         return 0;
 278 }
 279
 280 static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
 281         u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
 282         u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
 283 {
 284         u8 b[10];
 285         b[0] = REQUEST_SET_CLOCK;
 286         b[1] = (en_pll << 7) | (pll_src << 6) | (pll_range << 5) | (clock_gpio3 << 4);
 287         b[2] = (pll_prediv >> 8)  & 0xff; // MSB
 288         b[3] =  pll_prediv        & 0xff; // LSB
 289         b[4] = (pll_loopdiv >> 8) & 0xff; // MSB
 290         b[5] =  pll_loopdiv       & 0xff; // LSB
 291         b[6] = (free_div >> 8)    & 0xff; // MSB
 292         b[7] =  free_div          & 0xff; // LSB
 293         b[8] = (dsuScaler >> 8)   & 0xff; // MSB
 294         b[9] =  dsuScaler         & 0xff; // LSB
 295
 296         return dib0700_ctrl_wr(d, b, 10);
 297 }
 298
 299 int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
 300 {
 301         switch (clk_MHz) {
 302                 case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
 303                 default: return -EINVAL;
 304         }
 305         return 0;
 306 }
 307
 308 static int dib0700_jumpram(struct usb_device *udev, u32 address)
 309 {
 310         int ret, actlen;
 311         u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
 312                 (address >> 24) & 0xff,
 313                 (address >> 16) & 0xff,
 314                 (address >> 8)  & 0xff,
 315                  address        & 0xff };
 316
 317         if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
 318                 deb_fw("jumpram to 0x%x failed\n",address);
 319                 return ret;
 320         }
 321         if (actlen != 8) {
 322                 deb_fw("jumpram to 0x%x failed\n",address);
 323                 return -EIO;
 324         }
 325         return 0;
 326 }
 327
 328 int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
 329 {
 330         struct hexline hx;
 331         int pos = 0, ret, act_len;
 332
 333         u8 buf[260];
 334
 335         while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
 336                 deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);
 337
 338                 buf[0] = hx.len;
 339                 buf[1] = (hx.addr >> 8) & 0xff;
 340                 buf[2] =  hx.addr       & 0xff;
 341                 buf[3] = hx.type;
 342                 memcpy(&buf[4],hx.data,hx.len);
 343                 buf[4+hx.len] = hx.chk;
 344
 345                 ret = usb_bulk_msg(udev,
 346                         usb_sndbulkpipe(udev, 0x01),
 347                         buf,
 348                         hx.len + 5,
 349                         &act_len,
 350                         1000);
 351
 352                 if (ret < 0) {
 353                         err("firmware download failed at %d with %d",pos,ret);
 354                         return ret;
 355                 }
 356         }
 357
 358         if (ret == 0) {
 359                 /* start the firmware */
 360                 if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
 361                         info("firmware started successfully.");
 362                         msleep(500);
 363                 }
 364         } else
 365                 ret = -EIO;
 366
 367         return ret;
 368 }
 369
 370 int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 371 {
 372         struct dib0700_state *st = adap->dev->priv;
 373         u8 b[4];
 374
 375         b[0] = REQUEST_ENABLE_VIDEO;
 376         b[1] = (onoff << 4) | 0x00; /* this bit gives a kind of command, rather than enabling something or not */
 377
 378         if (st->disable_streaming_master_mode == 1)
 379                 b[2] = 0x00;
 380         else
 381                 b[2] = (0x01 << 4); /* Master mode */
 382
 383         b[3] = 0x00;
 384
 385         deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
 386
 387         if (onoff)
 388                 st->channel_state |=   1 << adap->id;
 389         else
 390                 st->channel_state &= ~(1 << adap->id);
 391
 392         b[2] |= st->channel_state;
 393
 394         deb_info("data for streaming: %x %x\n",b[1],b[2]);
 395
 396         return dib0700_ctrl_wr(adap->dev, b, 4);
 397 }
 398
 399 int dib0700_rc_setup(struct dvb_usb_device *d)
 400 {
 401         u8 rc_setup[3] = {REQUEST_SET_RC, dvb_usb_dib0700_ir_proto, 0};
 402         int i = dib0700_ctrl_wr(d, rc_setup, 3);
 403         if (i<0) {
 404                 err("ir protocol setup failed");
 405                 return -1;
 406         }
 407         return 0;
 408 }
 409
 410 static int dib0700_probe(struct usb_interface *intf,
 411                 const struct usb_device_id *id)
 412 {
 413         int i;
 414         struct dvb_usb_device *dev;
 415
 416         for (i = 0; i < dib0700_device_count; i++)
 417                 if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
 418                                         &dev, adapter_nr) == 0)
 419                 {
 420                         dib0700_rc_setup(dev);
 421                         return 0;
 422                 }
 423
 424         return -ENODEV;
 425 }
 426
 427 static struct usb_driver dib0700_driver = {
 428         .name       = "dvb_usb_dib0700",
 429         .probe      = dib0700_probe,
 430         .disconnect = dvb_usb_device_exit,
 431         .id_table   = dib0700_usb_id_table,
 432 };
 433
 434 /* module stuff */
 435 static int __init dib0700_module_init(void)
 436 {
 437         int result;
 438         info("loaded with support for %d different device-types", dib0700_device_count);
 439         if ((result = usb_register(&dib0700_driver))) {
 440                 err("usb_register failed. Error number %d",result);
 441                 return result;
 442         }
 443
 444         return 0;
 445 }
 446
 447 static void __exit dib0700_module_exit(void)
 448 {
 449         /* deregister this driver from the USB subsystem */
 450         usb_deregister(&dib0700_driver);
 451 }
 452
 453 module_init (dib0700_module_init);
 454 module_exit (dib0700_module_exit);
 455
 456 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
 457 MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
 458 MODULE_VERSION("1.0");
 459 MODULE_LICENSE("GPL");