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
  57 static unsigned int ci_dbg;
  58 module_param(ci_dbg, int, 0644);
  59 MODULE_PARM_DESC(ci_dbg, "Enable CI debugging");
  60
  61 #define ci_dbg_print(args...) \
  62         do { \
  63                 if (ci_dbg) \
  64                         printk(KERN_DEBUG args); \
  65         } while (0)
  66
  67 /* stores all private variables for communication with CI */
  68 struct netup_ci_state {
  69         struct dvb_ca_en50221 ca;
  70         struct mutex ca_mutex;
  71         struct i2c_adapter *i2c_adap;
  72         u8 ci_i2c_addr;
  73         int status;
  74         struct work_struct work;
  75         void *priv;
  76 };
  77
  78 struct mutex gpio_mutex;/* Two CiMax's uses same GPIO lines */
  79
  80 int netup_read_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
  81                                                 u8 *buf, int len)
  82 {
  83         int ret;
  84         struct i2c_msg msg[] = {
  85                 {
  86                         .addr   = addr,
  87                         .flags  = 0,
  88                         .buf    = &reg,
  89                         .len    = 1
  90                 }, {
  91                         .addr   = addr,
  92                         .flags  = I2C_M_RD,
  93                         .buf    = buf,
  94                         .len    = len
  95                 }
  96         };
  97
  98         ret = i2c_transfer(i2c_adap, msg, 2);
  99
 100         if (ret != 2) {
 101                 ci_dbg_print("%s: i2c read error, Reg = 0x%02x, Status = %d\n",
 102                                                 __func__, reg, ret);
 103
 104                 return -1;
 105         }
 106
 107         ci_dbg_print("%s: i2c read Addr=0x%04x, Reg = 0x%02x, data = %02x\n",
 108                                                 __func__, addr, reg, buf[0]);
 109
 110         return 0;
 111 }
 112
 113 int netup_write_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
 114                                                 u8 *buf, int len)
 115 {
 116         int ret;
 117         u8 buffer[len + 1];
 118
 119         struct i2c_msg msg = {
 120                 .addr   = addr,
 121                 .flags  = 0,
 122                 .buf    = &buffer[0],
 123                 .len    = len + 1
 124         };
 125
 126         buffer[0] = reg;
 127         memcpy(&buffer[1], buf, len);
 128
 129         ret = i2c_transfer(i2c_adap, &msg, 1);
 130
 131         if (ret != 1) {
 132                 ci_dbg_print("%s: i2c write error, Reg=[0x%02x], Status=%d\n",
 133                                                 __func__, reg, ret);
 134                 return -1;
 135         }
 136
 137         return 0;
 138 }
 139
 140 int netup_ci_get_mem(struct cx23885_dev *dev)
 141 {
 142         int mem;
 143         unsigned long timeout = jiffies + msecs_to_jiffies(1);
 144
 145         for (;;) {
 146                 mem = cx_read(MC417_RWD);
 147                 if ((mem & NETUP_ACK) == 0)
 148                         break;
 149                 if (time_after(jiffies, timeout))
 150                         break;
 151                 udelay(1);
 152         }
 153
 154         cx_set(MC417_RWD, NETUP_CTRL_OFF);
 155
 156         return mem & 0xff;
 157 }
 158
 159 int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
 160                                 u8 flag, u8 read, int addr, u8 data)
 161 {
 162         struct netup_ci_state *state = en50221->data;
 163         struct cx23885_tsport *port = state->priv;
 164         struct cx23885_dev *dev = port->dev;
 165
 166         u8 store;
 167         int mem;
 168         int ret;
 169
 170         if (0 != slot)
 171                 return -EINVAL;
 172
 173         ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
 174                                                         0, &store, 1);
 175         if (ret != 0)
 176                 return ret;
 177
 178         store &= ~0x0c;
 179         store |= flag;
 180
 181         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 182                                                         0, &store, 1);
 183         if (ret != 0)
 184                 return ret;
 185
 186         mutex_lock(&gpio_mutex);
 187
 188         /* write addr */
 189         cx_write(MC417_OEN, NETUP_EN_ALL);
 190         cx_write(MC417_RWD, NETUP_CTRL_OFF |
 191                                 NETUP_ADLO | (0xff & addr));
 192         cx_clear(MC417_RWD, NETUP_ADLO);
 193         cx_write(MC417_RWD, NETUP_CTRL_OFF |
 194                                 NETUP_ADHI | (0xff & (addr >> 8)));
 195         cx_clear(MC417_RWD, NETUP_ADHI);
 196
 197         if (read) /* data in */
 198                 cx_write(MC417_OEN, NETUP_EN_ALL | NETUP_DATA);
 199         else /* data out */
 200                 cx_write(MC417_RWD, NETUP_CTRL_OFF | data);
 201
 202         /* choose chip */
 203         cx_clear(MC417_RWD,
 204                         (state->ci_i2c_addr == 0x40) ? NETUP_CS0 : NETUP_CS1);
 205         /* read/write */
 206         cx_clear(MC417_RWD, (read) ? NETUP_RD : NETUP_WR);
 207         mem = netup_ci_get_mem(dev);
 208
 209         mutex_unlock(&gpio_mutex);
 210
 211         if (!read)
 212                 if (mem < 0)
 213                         return -EREMOTEIO;
 214
 215         ci_dbg_print("%s: %s: addr=[0x%02x], %s=%x\n", __func__,
 216                         (read) ? "read" : "write", addr,
 217                         (flag == NETUP_CI_CTL) ? "ctl" : "mem",
 218                         (read) ? mem : data);
 219
 220         if (read)
 221                 return mem;
 222
 223         return 0;
 224 }
 225
 226 int netup_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
 227                                                 int slot, int addr)
 228 {
 229         return netup_ci_op_cam(en50221, slot, 0, NETUP_CI_RD, addr, 0);
 230 }
 231
 232 int netup_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
 233                                                 int slot, int addr, u8 data)
 234 {
 235         return netup_ci_op_cam(en50221, slot, 0, 0, addr, data);
 236 }
 237
 238 int netup_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
 239 {
 240         return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL,
 241                                                         NETUP_CI_RD, addr, 0);
 242 }
 243
 244 int netup_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot,
 245                                                         u8 addr, u8 data)
 246 {
 247         return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 0, addr, data);
 248 }
 249
 250 int netup_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
 251 {
 252         struct netup_ci_state *state = en50221->data;
 253         u8 buf =  0x80;
 254         int ret;
 255
 256         if (0 != slot)
 257                 return -EINVAL;
 258
 259         udelay(500);
 260         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 261                                                         0, &buf, 1);
 262
 263         if (ret != 0)
 264                 return ret;
 265
 266         udelay(500);
 267
 268         buf = 0x00;
 269         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 270                                                         0, &buf, 1);
 271
 272         msleep(1000);
 273         dvb_ca_en50221_camready_irq(&state->ca, 0);
 274
 275         return 0;
 276
 277 }
 278
 279 int netup_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
 280 {
 281         /* not implemented */
 282         return 0;
 283 }
 284
 285 int netup_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221, int slot)
 286 {
 287         struct netup_ci_state *state = en50221->data;
 288         u8 buf = 0x60;
 289
 290         if (0 != slot)
 291                 return -EINVAL;
 292
 293         return netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 294                                                         0, &buf, 1);
 295 }
 296
 297 /* work handler */
 298 static void netup_read_ci_status(struct work_struct *work)
 299 {
 300         struct netup_ci_state *state =
 301                         container_of(work, struct netup_ci_state, work);
 302         u8 buf[33];
 303         int ret;
 304
 305         ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
 306                                                         0, &buf[0], 33);
 307
 308         if (ret != 0)
 309                 return;
 310
 311         ci_dbg_print("%s: Slot Status Addr=[0x%04x], Reg=[0x%02x], data=%02x, "
 312                 "TS config = %02x\n", __func__, state->ci_i2c_addr, 0, buf[0],
 313                 buf[32]);
 314
 315         if (buf[0] && 1)
 316                 state->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
 317                         DVB_CA_EN50221_POLL_CAM_READY;
 318         else
 319                 state->status = 0;
 320 }
 321
 322 /* CI irq handler */
 323 int netup_ci_slot_status(struct cx23885_dev *dev, u32 pci_status)
 324 {
 325         struct cx23885_tsport *port = NULL;
 326         struct netup_ci_state *state = NULL;
 327
 328         if (pci_status & PCI_MSK_GPIO0)
 329                 port = &dev->ts1;
 330         else if (pci_status & PCI_MSK_GPIO1)
 331                 port = &dev->ts2;
 332         else /* who calls ? */
 333                 return 0;
 334
 335         state = port->port_priv;
 336
 337         schedule_work(&state->work);
 338
 339         return 1;
 340 }
 341
 342 int netup_poll_ci_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
 343 {
 344         struct netup_ci_state *state = en50221->data;
 345
 346         if (0 != slot)
 347                 return -EINVAL;
 348
 349         return state->status;
 350 }
 351
 352 int netup_ci_init(struct cx23885_tsport *port)
 353 {
 354         struct netup_ci_state *state;
 355         u8 cimax_init[34] = {
 356                 0x00, /* module A control*/
 357                 0x00, /* auto select mask high A */
 358                 0x00, /* auto select mask low A */
 359                 0x00, /* auto select pattern high A */
 360                 0x00, /* auto select pattern low A */
 361                 0x44, /* memory access time A */
 362                 0x00, /* invert input A */
 363                 0x00, /* RFU */
 364                 0x00, /* RFU */
 365                 0x00, /* module B control*/
 366                 0x00, /* auto select mask high B */
 367                 0x00, /* auto select mask low B */
 368                 0x00, /* auto select pattern high B */
 369                 0x00, /* auto select pattern low B */
 370                 0x44, /* memory access time B */
 371                 0x00, /* invert input B */
 372                 0x00, /* RFU */
 373                 0x00, /* RFU */
 374                 0x00, /* auto select mask high Ext */
 375                 0x00, /* auto select mask low Ext */
 376                 0x00, /* auto select pattern high Ext */
 377                 0x00, /* auto select pattern low Ext */
 378                 0x00, /* RFU */
 379                 0x02, /* destination - module A */
 380                 0x01, /* power on (use it like store place) */
 381                 0x00, /* RFU */
 382                 0x00, /* int status read only */
 383                 0x01, /* all int unmasked */
 384                 0x04, /* int config */
 385                 0x00, /* USCG1 */
 386                 0x04, /* ack active low */
 387                 0x00, /* LOCK = 0 */
 388                 0x33, /* serial mode, rising in, rising out, MSB first*/
 389                 0x31, /* syncronization */
 390         };
 391         int ret;
 392
 393         ci_dbg_print("%s\n", __func__);
 394         state = kzalloc(sizeof(struct netup_ci_state), GFP_KERNEL);
 395         if (!state) {
 396                 ci_dbg_print("%s: Unable create CI structure!\n", __func__);
 397                 ret = -ENOMEM;
 398                 goto err;
 399         }
 400
 401         port->port_priv = state;
 402
 403         switch (port->nr) {
 404         case 1:
 405                 state->ci_i2c_addr = 0x40;
 406                 mutex_init(&gpio_mutex);
 407                 break;
 408         case 2:
 409                 state->ci_i2c_addr = 0x41;
 410                 break;
 411         }
 412
 413         state->i2c_adap = &port->dev->i2c_bus[0].i2c_adap;
 414         state->ca.owner = THIS_MODULE;
 415         state->ca.read_attribute_mem = netup_ci_read_attribute_mem;
 416         state->ca.write_attribute_mem = netup_ci_write_attribute_mem;
 417         state->ca.read_cam_control = netup_ci_read_cam_ctl;
 418         state->ca.write_cam_control = netup_ci_write_cam_ctl;
 419         state->ca.slot_reset = netup_ci_slot_reset;
 420         state->ca.slot_shutdown = netup_ci_slot_shutdown;
 421         state->ca.slot_ts_enable = netup_ci_slot_ts_ctl;
 422         state->ca.poll_slot_status = netup_poll_ci_slot_status;
 423         state->ca.data = state;
 424         state->priv = port;
 425
 426         ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 427                                                 0, &cimax_init[0], 34);
 428         /* lock registers */
 429         ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 430                                                 0x1f, &cimax_init[0x18], 1);
 431         /* power on slots */
 432         ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
 433                                                 0x18, &cimax_init[0x18], 1);
 434
 435         if (0 != ret)
 436                 goto err;
 437
 438         ret = dvb_ca_en50221_init(&port->frontends.adapter,
 439                                    &state->ca,
 440                                    /* flags */ 0,
 441                                    /* n_slots */ 1);
 442         if (0 != ret)
 443                 goto err;
 444
 445         INIT_WORK(&state->work, netup_read_ci_status);
 446
 447         ci_dbg_print("%s: CI initialized!\n", __func__);
 448
 449         return 0;
 450 err:
 451         ci_dbg_print("%s: Cannot initialize CI: Error %d.\n", __func__, ret);
 452         kfree(state);
 453         return ret;
 454 }
 455
 456 void netup_ci_exit(struct cx23885_tsport *port)
 457 {
 458         struct netup_ci_state *state;
 459
 460         if (NULL == port)
 461                 return;
 462
 463         state = (struct netup_ci_state *)port->port_priv;
 464         if (NULL == state)
 465                 return;
 466
 467         if (NULL == state->ca.data)
 468                 return;
 469
 470         dvb_ca_en50221_release(&state->ca);
 471         kfree(state);
 472 }