drivers/media/dvb-frontends/sp2.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * CIMaX SP2/SP2HF (Atmel T90FJR) CI driver
   4  *
   5  * Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi>
   6  *
   7  * Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual
   8  * DVB-S2 CI card (cimax2) with following copyrights:
   9  *
  10  *  Copyright (C) 2009 NetUP Inc.
  11  *  Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
  12  *  Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
  13  */
  14
  15 #include "sp2_priv.h"
  16
  17 static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
  18 {
  19         int ret;
  20         struct i2c_client *client = s->client;
  21         struct i2c_adapter *adap = client->adapter;
  22         struct i2c_msg msg[] = {
  23                 {
  24                         .addr = client->addr,
  25                         .flags = 0,
  26                         .buf = &reg,
  27                         .len = 1
  28                 }, {
  29                         .addr = client->addr,
  30                         .flags  = I2C_M_RD,
  31                         .buf = buf,
  32                         .len = len
  33                 }
  34         };
  35
  36         ret = i2c_transfer(adap, msg, 2);
  37
  38         if (ret != 2) {
  39                 dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n",
  40                                 reg, ret);
  41                 if (ret < 0)
  42                         return ret;
  43                 else
  44                         return -EIO;
  45         }
  46
  47         dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n",
  48                                 client->addr, reg, buf[0]);
  49
  50         return 0;
  51 }
  52
  53 static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
  54 {
  55         int ret;
  56         u8 buffer[35];
  57         struct i2c_client *client = s->client;
  58         struct i2c_adapter *adap = client->adapter;
  59         struct i2c_msg msg = {
  60                 .addr = client->addr,
  61                 .flags = 0,
  62                 .buf = &buffer[0],
  63                 .len = len + 1
  64         };
  65
  66         if ((len + 1) > sizeof(buffer)) {
  67                 dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n",
  68                                 reg, len);
  69                 return -EINVAL;
  70         }
  71
  72         buffer[0] = reg;
  73         memcpy(&buffer[1], buf, len);
  74
  75         ret = i2c_transfer(adap, &msg, 1);
  76
  77         if (ret != 1) {
  78                 dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n",
  79                                 reg, ret);
  80                 if (ret < 0)
  81                         return ret;
  82                 else
  83                         return -EIO;
  84         }
  85
  86         dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n",
  87                                 client->addr, reg, len, buf);
  88
  89         return 0;
  90 }
  91
  92 static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs,
  93                         u8 read, int addr, u8 data)
  94 {
  95         struct sp2 *s = en50221->data;
  96         u8 store;
  97         int mem, ret;
  98         int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control;
  99
 100         if (slot != 0)
 101                 return -EINVAL;
 102
 103         /*
 104          * change module access type between IO space and attribute memory
 105          * when needed
 106          */
 107         if (s->module_access_type != acs) {
 108                 ret = sp2_read_i2c(s, 0x00, &store, 1);
 109
 110                 if (ret)
 111                         return ret;
 112
 113                 store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0);
 114                 store |= acs;
 115
 116                 ret = sp2_write_i2c(s, 0x00, &store, 1);
 117                 if (ret)
 118                         return ret;
 119         }
 120
 121         s->module_access_type = acs;
 122
 123         /* implementation of ci_op_cam is device specific */
 124         if (ci_op_cam) {
 125                 ret = ci_op_cam(s->priv, read, addr, data, &mem);
 126         } else {
 127                 dev_err(&s->client->dev, "callback not defined");
 128                 return -EINVAL;
 129         }
 130
 131         if (ret)
 132                 return ret;
 133
 134         dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x",
 135                         (read) ? "read" : "write", slot, addr,
 136                         (acs == SP2_CI_ATTR_ACS) ? "attr" : "io",
 137                         (read) ? mem : data);
 138
 139         if (read)
 140                 return mem;
 141         else
 142                 return 0;
 143
 144 }
 145
 146 int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
 147                                 int slot, int addr)
 148 {
 149         return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
 150                         SP2_CI_RD, addr, 0);
 151 }
 152
 153 int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
 154                                 int slot, int addr, u8 data)
 155 {
 156         return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
 157                         SP2_CI_WR, addr, data);
 158 }
 159
 160 int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221,
 161                                 int slot, u8 addr)
 162 {
 163         return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
 164                         SP2_CI_RD, addr, 0);
 165 }
 166
 167 int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221,
 168                                 int slot, u8 addr, u8 data)
 169 {
 170         return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
 171                         SP2_CI_WR, addr, data);
 172 }
 173
 174 int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
 175 {
 176         struct sp2 *s = en50221->data;
 177         u8 buf;
 178         int ret;
 179
 180         dev_dbg(&s->client->dev, "slot: %d\n", slot);
 181
 182         if (slot != 0)
 183                 return -EINVAL;
 184
 185         /* RST on */
 186         buf = SP2_MOD_CTL_RST;
 187         ret = sp2_write_i2c(s, 0x00, &buf, 1);
 188
 189         if (ret)
 190                 return ret;
 191
 192         usleep_range(500, 600);
 193
 194         /* RST off */
 195         buf = 0x00;
 196         ret = sp2_write_i2c(s, 0x00, &buf, 1);
 197
 198         if (ret)
 199                 return ret;
 200
 201         msleep(1000);
 202
 203         return 0;
 204 }
 205
 206 int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
 207 {
 208         struct sp2 *s = en50221->data;
 209
 210         dev_dbg(&s->client->dev, "slot:%d\n", slot);
 211
 212         /* not implemented */
 213         return 0;
 214 }
 215
 216 int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot)
 217 {
 218         struct sp2 *s = en50221->data;
 219         u8 buf;
 220
 221         dev_dbg(&s->client->dev, "slot:%d\n", slot);
 222
 223         if (slot != 0)
 224                 return -EINVAL;
 225
 226         sp2_read_i2c(s, 0x00, &buf, 1);
 227
 228         /* disable bypass and enable TS */
 229         buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN);
 230         return sp2_write_i2c(s, 0, &buf, 1);
 231 }
 232
 233 int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221,
 234                                 int slot, int open)
 235 {
 236         struct sp2 *s = en50221->data;
 237         u8 buf[2];
 238         int ret;
 239
 240         dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open);
 241
 242         /*
 243          * CAM module INSERT/REMOVE processing. Slow operation because of i2c
 244          * transfers. Throttle read to one per sec.
 245          */
 246         if (time_after(jiffies, s->next_status_checked_time)) {
 247                 ret = sp2_read_i2c(s, 0x00, buf, 1);
 248                 s->next_status_checked_time = jiffies + msecs_to_jiffies(1000);
 249
 250                 if (ret)
 251                         return 0;
 252
 253                 if (buf[0] & SP2_MOD_CTL_DET)
 254                         s->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
 255                                         DVB_CA_EN50221_POLL_CAM_READY;
 256                 else
 257                         s->status = 0;
 258         }
 259
 260         return s->status;
 261 }
 262
 263 static int sp2_init(struct sp2 *s)
 264 {
 265         int ret = 0;
 266         u8 buf;
 267         u8 cimax_init[34] = {
 268                 0x00, /* module A control*/
 269                 0x00, /* auto select mask high A */
 270                 0x00, /* auto select mask low A */
 271                 0x00, /* auto select pattern high A */
 272                 0x00, /* auto select pattern low A */
 273                 0x44, /* memory access time A, 600 ns */
 274                 0x00, /* invert input A */
 275                 0x00, /* RFU */
 276                 0x00, /* RFU */
 277                 0x00, /* module B control*/
 278                 0x00, /* auto select mask high B */
 279                 0x00, /* auto select mask low B */
 280                 0x00, /* auto select pattern high B */
 281                 0x00, /* auto select pattern low B */
 282                 0x44, /* memory access time B, 600 ns */
 283                 0x00, /* invert input B */
 284                 0x00, /* RFU */
 285                 0x00, /* RFU */
 286                 0x00, /* auto select mask high Ext */
 287                 0x00, /* auto select mask low Ext */
 288                 0x00, /* auto select pattern high Ext */
 289                 0x00, /* auto select pattern low Ext */
 290                 0x00, /* RFU */
 291                 0x02, /* destination - module A */
 292                 0x01, /* power control reg, VCC power on */
 293                 0x00, /* RFU */
 294                 0x00, /* int status read only */
 295                 0x00, /* Interrupt Mask Register */
 296                 0x05, /* EXTINT=active-high, INT=push-pull */
 297                 0x00, /* USCG1 */
 298                 0x04, /* ack active low */
 299                 0x00, /* LOCK = 0 */
 300                 0x22, /* unknown */
 301                 0x00, /* synchronization? */
 302         };
 303
 304         dev_dbg(&s->client->dev, "\n");
 305
 306         s->ca.owner = THIS_MODULE;
 307         s->ca.read_attribute_mem = sp2_ci_read_attribute_mem;
 308         s->ca.write_attribute_mem = sp2_ci_write_attribute_mem;
 309         s->ca.read_cam_control = sp2_ci_read_cam_control;
 310         s->ca.write_cam_control = sp2_ci_write_cam_control;
 311         s->ca.slot_reset = sp2_ci_slot_reset;
 312         s->ca.slot_shutdown = sp2_ci_slot_shutdown;
 313         s->ca.slot_ts_enable = sp2_ci_slot_ts_enable;
 314         s->ca.poll_slot_status = sp2_ci_poll_slot_status;
 315         s->ca.data = s;
 316         s->module_access_type = 0;
 317
 318         /* initialize all regs */
 319         ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34);
 320         if (ret)
 321                 goto err;
 322
 323         /* lock registers */
 324         buf = 1;
 325         ret = sp2_write_i2c(s, 0x1f, &buf, 1);
 326         if (ret)
 327                 goto err;
 328
 329         /* power on slots */
 330         ret = sp2_write_i2c(s, 0x18, &buf, 1);
 331         if (ret)
 332                 goto err;
 333
 334         ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1);
 335         if (ret)
 336                 goto err;
 337
 338         return 0;
 339
 340 err:
 341         dev_dbg(&s->client->dev, "init failed=%d\n", ret);
 342         return ret;
 343 }
 344
 345 static int sp2_exit(struct i2c_client *client)
 346 {
 347         struct sp2 *s;
 348
 349         dev_dbg(&client->dev, "\n");
 350
 351         if (!client)
 352                 return 0;
 353
 354         s = i2c_get_clientdata(client);
 355         if (!s)
 356                 return 0;
 357
 358         if (!s->ca.data)
 359                 return 0;
 360
 361         dvb_ca_en50221_release(&s->ca);
 362
 363         return 0;
 364 }
 365
 366 static int sp2_probe(struct i2c_client *client,
 367                 const struct i2c_device_id *id)
 368 {
 369         struct sp2_config *cfg = client->dev.platform_data;
 370         struct sp2 *s;
 371         int ret;
 372
 373         dev_dbg(&client->dev, "\n");
 374
 375         s = kzalloc(sizeof(*s), GFP_KERNEL);
 376         if (!s) {
 377                 ret = -ENOMEM;
 378                 goto err;
 379         }
 380
 381         s->client = client;
 382         s->dvb_adap = cfg->dvb_adap;
 383         s->priv = cfg->priv;
 384         s->ci_control = cfg->ci_control;
 385
 386         i2c_set_clientdata(client, s);
 387
 388         ret = sp2_init(s);
 389         if (ret)
 390                 goto err;
 391
 392         dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");
 393         return 0;
 394 err:
 395         dev_dbg(&client->dev, "init failed=%d\n", ret);
 396         kfree(s);
 397
 398         return ret;
 399 }
 400
 401 static int sp2_remove(struct i2c_client *client)
 402 {
 403         struct sp2 *s = i2c_get_clientdata(client);
 404
 405         dev_dbg(&client->dev, "\n");
 406         sp2_exit(client);
 407         kfree(s);
 408         return 0;
 409 }
 410
 411 static const struct i2c_device_id sp2_id[] = {
 412         {"sp2", 0},
 413         {}
 414 };
 415 MODULE_DEVICE_TABLE(i2c, sp2_id);
 416
 417 static struct i2c_driver sp2_driver = {
 418         .driver = {
 419                 .name   = "sp2",
 420         },
 421         .probe          = sp2_probe,
 422         .remove         = sp2_remove,
 423         .id_table       = sp2_id,
 424 };
 425
 426 module_i2c_driver(sp2_driver);
 427
 428 MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
 429 MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
 430 MODULE_LICENSE("GPL");