drivers/media/video/cx23885/cimax2.c

   1 /*
   2  * cimax2.c
   3  *
   4  * CIMax2(R) SP2 driver in conjunction with NetUp Dual DVB-S2 CI card
   5  *
   6  * Copyright (C) 2009 NetUP Inc.
   7  * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
   8  * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include "cx23885.h"
  27 #include "dvb_ca_en50221.h"
  28 /**** Bit definitions for MC417_RWD and MC417_OEN registers  ***
  29   bits 31-16
  30 +-----------+
  31 | Reserved  |
  32 +-----------+
  33   bit 15  bit 14  bit 13 bit 12  bit 11  bit 10  bit 9   bit 8
  34 +-------+-------+-------+-------+-------+-------+-------+-------+
  35 |  WR#  |  RD#  |       |  ACK# |  ADHI |  ADLO |  CS1# |  CS0# |
  36 +-------+-------+-------+-------+-------+-------+-------+-------+
  37  bit 7   bit 6   bit 5   bit 4   bit 3   bit 2   bit 1   bit 0
  38 +-------+-------+-------+-------+-------+-------+-------+-------+
  39 |  DATA7|  DATA6|  DATA5|  DATA4|  DATA3|  DATA2|  DATA1|  DATA0|
  40 +-------+-------+-------+-------+-------+-------+-------+-------+
  41 ***/
  42 /* MC417 */
  43 #define NETUP_DATA              0x000000ff
  44 #define NETUP_WR                0x00008000
  45 #define NETUP_RD                0x00004000
  46 #define NETUP_ACK               0x00001000
  47 #define NETUP_ADHI              0x00000800
  48 #define NETUP_ADLO              0x00000400
  49 #define NETUP_CS1               0x00000200
  50 #define NETUP_CS0               0x00000100
  51 #define NETUP_EN_ALL            0x00001000
  52 #define NETUP_CTRL_OFF          (NETUP_CS1 | NETUP_CS0 | NETUP_WR | NETUP_RD)
  53 #define NETUP_CI_CTL            0x04
  54 #define NETUP_CI_RD             1
  55
  56 #define NETUP_IRQ_DETAM         0x1
  57 #define NETUP_IRQ_IRQAM         0x4
  58
  59 static unsigned int ci_dbg;
  60 module_param(ci_dbg, int, 0644);
  61 MODULE_PARM_DESC(ci_dbg, "Enable CI debugging");
  62
  63 static unsigned int ci_irq_enable;
  64 module_param(ci_irq_enable, int, 0644);
  65 MODULE_PARM_DESC(ci_irq_enable, "Enable IRQ from CAM");
  66
  67 #define ci_dbg_print(args...) \
  68         do { \
  69                 if (ci_dbg) \
  70                         printk(KERN_DEBUG args); \
  71         } while (0)
  72
  73 #define ci_irq_flags() (ci_irq_enable ? NETUP_IRQ_IRQAM : 0)
  74
  75 /* stores all private variables for communication with CI */
  76 struct netup_ci_state {
  77         struct dvb_ca_en50221 ca;
  78         struct mutex ca_mutex;
  79         struct i2c_adapter *i2c_adap;
  80         u8 ci_i2c_addr;
  81         int status;
  82         struct work_struct work;
  83         void *priv;
  84         u8 current_irq_mode;
  85         int current_ci_flag;
  86         unsigned long next_status_checked_time;
  87 };
  88
  89
  90 int netup_read_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
  91                                                 u8 *buf, int len)
  92 {
  93         int ret;
  94         struct i2c_msg msg[] = {
  95                 {
  96                         .addr   = addr,
  97                         .flags  = 0,
  98                         .buf    = &reg,
  99                         .len    = 1
 100                 }, {
 101                         .addr   = addr,
 102                         .flags  = I2C_M_RD,
 103                         .buf    = buf,
 104                         .len    = len
 105                 }
 106         };
 107
 108         ret = i2c_transfer(i2c_adap, msg, 2);
 109
 110         if (ret != 2) {
 111                 ci_dbg_print("%s: i2c read error, Reg = 0x%02x, Status = %d\n",
 112                                                 __func__, reg, ret);
 113
 114                 return -1;
 115         }
 116
 117         ci_dbg_print("%s: i2c read Addr=0x%04x, Reg = 0x%02x, data = %02x\n",
 118                                                 __func__, addr, reg, buf[0]);
 119
 120         return 0;
 121 }
 122
 123 int netup_write_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
 124                                                 u8 *buf, int len)
 125 {
 126         int ret;
 127         u8 buffer[len + 1];
 128
 129         struct i2c_msg msg = {
 130                 .addr   = addr,
 131                 .flags  = 0,
 132                 .buf    = &buffer[0],
 133                 .len    = len + 1
 134         };
 135
 136         buffer[0] = reg;
 137         memcpy(&buffer[1], buf, len);
 138
 139         ret = i2c_transfer(i2c_adap, &msg, 1);
 140
 141         if (ret != 1) {
 142                 ci_dbg_print("%s: i2c write error, Reg=[0x%02x], Status=%d\n",
 143                                                 __func__, reg, ret);
 144                 return -1;
 145         }
 146
 147         return 0;
 148 }
 149
 150 int netup_ci_get_mem(struct cx23885_dev *dev)
 151 {
 152         int mem;
 153         unsigned long timeout = jiffies + msecs_to_jiffies(1);
 154
 155         for (;;) {
 156                 mem = cx_read(MC417_RWD);
 157                 if ((mem & NETUP_ACK) == 0)
 158                         break;
 159                 if (time_after(jiffies, timeout))
 160                         break;
 161                 udelay(1);
 162         }
 163
 164         cx_set(MC417_RWD, NETUP_CTRL_OFF);
 165
 166         return mem & 0xff;
 167 }
 168
 169 int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
 170                                 u8 flag, u8 read, int addr, u8 data)
 171 {
 172         struct netup_ci_state *state = en50221->data;
 173         struct cx23885_tsport *port = state->priv;
 174         struct cx23885_dev *dev = port->dev;
 175
 176         u8 store;
 177         int mem;
 178         int ret;
 179
 180         if (0 != slot)
 181                 return -EINVAL;
 182
 183         if (state->current_ci_flag != flag) {
 184                 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
 185                                 0, &store, 1);
 186                 if (ret != 0)
 187                         return ret;
 188
 189                 store &= ~0x0c;
 190                 store |= flag;
 191
 192                 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 193                                 0, &store, 1);
 194                 if (ret != 0)
 195                         return ret;
 196         };
 197         state->current_ci_flag = flag;
 198
 199         mutex_lock(&dev->gpio_lock);
 200
 201         /* write addr */
 202         cx_write(MC417_OEN, NETUP_EN_ALL);
 203         cx_write(MC417_RWD, NETUP_CTRL_OFF |
 204                                 NETUP_ADLO | (0xff & addr));
 205         cx_clear(MC417_RWD, NETUP_ADLO);
 206         cx_write(MC417_RWD, NETUP_CTRL_OFF |
 207                                 NETUP_ADHI | (0xff & (addr >> 8)));
 208         cx_clear(MC417_RWD, NETUP_ADHI);
 209
 210         if (read) { /* data in */
 211                 cx_write(MC417_OEN, NETUP_EN_ALL | NETUP_DATA);
 212         } else /* data out */
 213                 cx_write(MC417_RWD, NETUP_CTRL_OFF | data);
 214
 215         /* choose chip */
 216         cx_clear(MC417_RWD,
 217                         (state->ci_i2c_addr == 0x40) ? NETUP_CS0 : NETUP_CS1);
 218         /* read/write */
 219         cx_clear(MC417_RWD, (read) ? NETUP_RD : NETUP_WR);
 220         mem = netup_ci_get_mem(dev);
 221
 222         mutex_unlock(&dev->gpio_lock);
 223
 224         if (!read)
 225                 if (mem < 0)
 226                         return -EREMOTEIO;
 227
 228         ci_dbg_print("%s: %s: chipaddr=[0x%x] addr=[0x%02x], %s=%x\n", __func__,
 229                         (read) ? "read" : "write", state->ci_i2c_addr, addr,
 230                         (flag == NETUP_CI_CTL) ? "ctl" : "mem",
 231                         (read) ? mem : data);
 232
 233         if (read)
 234                 return mem;
 235
 236         return 0;
 237 }
 238
 239 int netup_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
 240                                                 int slot, int addr)
 241 {
 242         return netup_ci_op_cam(en50221, slot, 0, NETUP_CI_RD, addr, 0);
 243 }
 244
 245 int netup_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
 246                                                 int slot, int addr, u8 data)
 247 {
 248         return netup_ci_op_cam(en50221, slot, 0, 0, addr, data);
 249 }
 250
 251 int netup_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
 252 {
 253         return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL,
 254                                                         NETUP_CI_RD, addr, 0);
 255 }
 256
 257 int netup_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot,
 258                                                         u8 addr, u8 data)
 259 {
 260         return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 0, addr, data);
 261 }
 262
 263 int netup_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
 264 {
 265         struct netup_ci_state *state = en50221->data;
 266         u8 buf =  0x80;
 267         int ret;
 268
 269         if (0 != slot)
 270                 return -EINVAL;
 271
 272         udelay(500);
 273         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 274                                                         0, &buf, 1);
 275
 276         if (ret != 0)
 277                 return ret;
 278
 279         udelay(500);
 280
 281         buf = 0x00;
 282         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 283                                                         0, &buf, 1);
 284
 285         msleep(1000);
 286         dvb_ca_en50221_camready_irq(&state->ca, 0);
 287
 288         return 0;
 289
 290 }
 291
 292 int netup_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
 293 {
 294         /* not implemented */
 295         return 0;
 296 }
 297
 298 int netup_ci_set_irq(struct dvb_ca_en50221 *en50221, u8 irq_mode)
 299 {
 300         struct netup_ci_state *state = en50221->data;
 301         int ret;
 302
 303         if (irq_mode == state->current_irq_mode)
 304                 return 0;
 305
 306         ci_dbg_print("%s: chipaddr=[0x%x] setting ci IRQ to [0x%x] \n",
 307                         __func__, state->ci_i2c_addr, irq_mode);
 308         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 309                                                         0x1b, &irq_mode, 1);
 310
 311         if (ret != 0)
 312                 return ret;
 313
 314         state->current_irq_mode = irq_mode;
 315
 316         return 0;
 317 }
 318
 319 int netup_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221, int slot)
 320 {
 321         struct netup_ci_state *state = en50221->data;
 322         u8 buf;
 323
 324         if (0 != slot)
 325                 return -EINVAL;
 326
 327         netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
 328                         0, &buf, 1);
 329         buf |= 0x60;
 330
 331         return netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 332                                                         0, &buf, 1);
 333 }
 334
 335 /* work handler */
 336 static void netup_read_ci_status(struct work_struct *work)
 337 {
 338         struct netup_ci_state *state =
 339                         container_of(work, struct netup_ci_state, work);
 340         u8 buf[33];
 341         int ret;
 342
 343         /* CAM module IRQ processing. fast operation */
 344         dvb_ca_en50221_frda_irq(&state->ca, 0);
 345
 346         /* CAM module INSERT/REMOVE processing. slow operation because of i2c
 347          * transfers */
 348         if (time_after(jiffies, state->next_status_checked_time)
 349                         || !state->status) {
 350                 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
 351                                 0, &buf[0], 33);
 352
 353                 state->next_status_checked_time = jiffies
 354                         + msecs_to_jiffies(1000);
 355
 356                 if (ret != 0)
 357                         return;
 358
 359                 ci_dbg_print("%s: Slot Status Addr=[0x%04x], "
 360                                 "Reg=[0x%02x], data=%02x, "
 361                                 "TS config = %02x\n", __func__,
 362                                 state->ci_i2c_addr, 0, buf[0],
 363                                 buf[0]);
 364
 365
 366                 if (buf[0] & 1)
 367                         state->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
 368                                 DVB_CA_EN50221_POLL_CAM_READY;
 369                 else
 370                         state->status = 0;
 371         }
 372 }
 373
 374 /* CI irq handler */
 375 int netup_ci_slot_status(struct cx23885_dev *dev, u32 pci_status)
 376 {
 377         struct cx23885_tsport *port = NULL;
 378         struct netup_ci_state *state = NULL;
 379
 380         ci_dbg_print("%s:\n", __func__);
 381
 382         if (0 == (pci_status & (PCI_MSK_GPIO0 | PCI_MSK_GPIO1)))
 383                 return 0;
 384
 385         if (pci_status & PCI_MSK_GPIO0) {
 386                 port = &dev->ts1;
 387                 state = port->port_priv;
 388                 schedule_work(&state->work);
 389                 ci_dbg_print("%s: Wakeup CI0\n", __func__);
 390         }
 391
 392         if (pci_status & PCI_MSK_GPIO1) {
 393                 port = &dev->ts2;
 394                 state = port->port_priv;
 395                 schedule_work(&state->work);
 396                 ci_dbg_print("%s: Wakeup CI1\n", __func__);
 397         }
 398
 399         return 1;
 400 }
 401
 402 int netup_poll_ci_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
 403 {
 404         struct netup_ci_state *state = en50221->data;
 405
 406         if (0 != slot)
 407                 return -EINVAL;
 408
 409         netup_ci_set_irq(en50221, open ? (NETUP_IRQ_DETAM | ci_irq_flags())
 410                         : NETUP_IRQ_DETAM);
 411
 412         return state->status;
 413 }
 414
 415 int netup_ci_init(struct cx23885_tsport *port)
 416 {
 417         struct netup_ci_state *state;
 418         u8 cimax_init[34] = {
 419                 0x00, /* module A control*/
 420                 0x00, /* auto select mask high A */
 421                 0x00, /* auto select mask low A */
 422                 0x00, /* auto select pattern high A */
 423                 0x00, /* auto select pattern low A */
 424                 0x44, /* memory access time A */
 425                 0x00, /* invert input A */
 426                 0x00, /* RFU */
 427                 0x00, /* RFU */
 428                 0x00, /* module B control*/
 429                 0x00, /* auto select mask high B */
 430                 0x00, /* auto select mask low B */
 431                 0x00, /* auto select pattern high B */
 432                 0x00, /* auto select pattern low B */
 433                 0x44, /* memory access time B */
 434                 0x00, /* invert input B */
 435                 0x00, /* RFU */
 436                 0x00, /* RFU */
 437                 0x00, /* auto select mask high Ext */
 438                 0x00, /* auto select mask low Ext */
 439                 0x00, /* auto select pattern high Ext */
 440                 0x00, /* auto select pattern low Ext */
 441                 0x00, /* RFU */
 442                 0x02, /* destination - module A */
 443                 0x01, /* power on (use it like store place) */
 444                 0x00, /* RFU */
 445                 0x00, /* int status read only */
 446                 ci_irq_flags() | NETUP_IRQ_DETAM, /* DETAM, IRQAM unmasked */
 447                 0x05, /* EXTINT=active-high, INT=push-pull */
 448                 0x00, /* USCG1 */
 449                 0x04, /* ack active low */
 450                 0x00, /* LOCK = 0 */
 451                 0x33, /* serial mode, rising in, rising out, MSB first*/
 452                 0x31, /* synchronization */
 453         };
 454         int ret;
 455
 456         ci_dbg_print("%s\n", __func__);
 457         state = kzalloc(sizeof(struct netup_ci_state), GFP_KERNEL);
 458         if (!state) {
 459                 ci_dbg_print("%s: Unable create CI structure!\n", __func__);
 460                 ret = -ENOMEM;
 461                 goto err;
 462         }
 463
 464         port->port_priv = state;
 465
 466         switch (port->nr) {
 467         case 1:
 468                 state->ci_i2c_addr = 0x40;
 469                 break;
 470         case 2:
 471                 state->ci_i2c_addr = 0x41;
 472                 break;
 473         }
 474
 475         state->i2c_adap = &port->dev->i2c_bus[0].i2c_adap;
 476         state->ca.owner = THIS_MODULE;
 477         state->ca.read_attribute_mem = netup_ci_read_attribute_mem;
 478         state->ca.write_attribute_mem = netup_ci_write_attribute_mem;
 479         state->ca.read_cam_control = netup_ci_read_cam_ctl;
 480         state->ca.write_cam_control = netup_ci_write_cam_ctl;
 481         state->ca.slot_reset = netup_ci_slot_reset;
 482         state->ca.slot_shutdown = netup_ci_slot_shutdown;
 483         state->ca.slot_ts_enable = netup_ci_slot_ts_ctl;
 484         state->ca.poll_slot_status = netup_poll_ci_slot_status;
 485         state->ca.data = state;
 486         state->priv = port;
 487         state->current_irq_mode = ci_irq_flags() | NETUP_IRQ_DETAM;
 488
 489         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 490                                                 0, &cimax_init[0], 34);
 491         /* lock registers */
 492         ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 493                                                 0x1f, &cimax_init[0x18], 1);
 494         /* power on slots */
 495         ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 496                                                 0x18, &cimax_init[0x18], 1);
 497
 498         if (0 != ret)
 499                 goto err;
 500
 501         ret = dvb_ca_en50221_init(&port->frontends.adapter,
 502                                    &state->ca,
 503                                    /* flags */ 0,
 504                                    /* n_slots */ 1);
 505         if (0 != ret)
 506                 goto err;
 507
 508         INIT_WORK(&state->work, netup_read_ci_status);
 509         schedule_work(&state->work);
 510
 511         ci_dbg_print("%s: CI initialized!\n", __func__);
 512
 513         return 0;
 514 err:
 515         ci_dbg_print("%s: Cannot initialize CI: Error %d.\n", __func__, ret);
 516         kfree(state);
 517         return ret;
 518 }
 519
 520 void netup_ci_exit(struct cx23885_tsport *port)
 521 {
 522         struct netup_ci_state *state;
 523
 524         if (NULL == port)
 525                 return;
 526
 527         state = (struct netup_ci_state *)port->port_priv;
 528         if (NULL == state)
 529                 return;
 530
 531         if (NULL == state->ca.data)
 532                 return;
 533
 534         dvb_ca_en50221_release(&state->ca);
 535         kfree(state);
 536 }