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 22 #include "cx23885.h" 23 #include "cimax2.h" 24 #include "dvb_ca_en50221.h" 25 26 /* Max transfer size done by I2C transfer functions */ 27 #define MAX_XFER_SIZE 64 28 29 /**** Bit definitions for MC417_RWD and MC417_OEN registers *** 30 bits 31-16 31 +-----------+ 32 | Reserved | 33 +-----------+ 34 bit 15 bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 35 +-------+-------+-------+-------+-------+-------+-------+-------+ 36 | WR# | RD# | | ACK# | ADHI | ADLO | CS1# | CS0# | 37 +-------+-------+-------+-------+-------+-------+-------+-------+ 38 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 39 +-------+-------+-------+-------+-------+-------+-------+-------+ 40 | DATA7| DATA6| DATA5| DATA4| DATA3| DATA2| DATA1| DATA0| 41 +-------+-------+-------+-------+-------+-------+-------+-------+ 42 ***/ 43 /* MC417 */ 44 #define NETUP_DATA 0x000000ff 45 #define NETUP_WR 0x00008000 46 #define NETUP_RD 0x00004000 47 #define NETUP_ACK 0x00001000 48 #define NETUP_ADHI 0x00000800 49 #define NETUP_ADLO 0x00000400 50 #define NETUP_CS1 0x00000200 51 #define NETUP_CS0 0x00000100 52 #define NETUP_EN_ALL 0x00001000 53 #define NETUP_CTRL_OFF (NETUP_CS1 | NETUP_CS0 | NETUP_WR | NETUP_RD) 54 #define NETUP_CI_CTL 0x04 55 #define NETUP_CI_RD 1 56 57 #define NETUP_IRQ_DETAM 0x1 58 #define NETUP_IRQ_IRQAM 0x4 59 60 static unsigned int ci_dbg; 61 module_param(ci_dbg, int, 0644); 62 MODULE_PARM_DESC(ci_dbg, "Enable CI debugging"); 63 64 static unsigned int ci_irq_enable; 65 module_param(ci_irq_enable, int, 0644); 66 MODULE_PARM_DESC(ci_irq_enable, "Enable IRQ from CAM"); 67 68 #define ci_dbg_print(fmt, args...) \ 69 do { \ 70 if (ci_dbg) \ 71 printk(KERN_DEBUG pr_fmt("%s: " fmt), \ 72 __func__, ##args); \ 73 } while (0) 74 75 #define ci_irq_flags() (ci_irq_enable ? NETUP_IRQ_IRQAM : 0) 76 77 /* stores all private variables for communication with CI */ 78 struct netup_ci_state { 79 struct dvb_ca_en50221 ca; 80 struct mutex ca_mutex; 81 struct i2c_adapter *i2c_adap; 82 u8 ci_i2c_addr; 83 int status; 84 struct work_struct work; 85 void *priv; 86 u8 current_irq_mode; 87 int current_ci_flag; 88 unsigned long next_status_checked_time; 89 }; 90 91 92 static int netup_read_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg, 93 u8 *buf, int len) 94 { 95 int ret; 96 struct i2c_msg msg[] = { 97 { 98 .addr = addr, 99 .flags = 0, 100 .buf = ®, 101 .len = 1 102 }, { 103 .addr = addr, 104 .flags = I2C_M_RD, 105 .buf = buf, 106 .len = len 107 } 108 }; 109 110 ret = i2c_transfer(i2c_adap, msg, 2); 111 112 if (ret != 2) { 113 ci_dbg_print("%s: i2c read error, Reg = 0x%02x, Status = %d\n", 114 __func__, reg, ret); 115 116 return -1; 117 } 118 119 ci_dbg_print("%s: i2c read Addr=0x%04x, Reg = 0x%02x, data = %02x\n", 120 __func__, addr, reg, buf[0]); 121 122 return 0; 123 } 124 125 static int netup_write_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg, 126 u8 *buf, int len) 127 { 128 int ret; 129 u8 buffer[MAX_XFER_SIZE]; 130 131 struct i2c_msg msg = { 132 .addr = addr, 133 .flags = 0, 134 .buf = &buffer[0], 135 .len = len + 1 136 }; 137 138 if (1 + len > sizeof(buffer)) { 139 pr_warn("%s: i2c wr reg=%04x: len=%d is too big!\n", 140 KBUILD_MODNAME, reg, len); 141 return -EINVAL; 142 } 143 144 buffer[0] = reg; 145 memcpy(&buffer[1], buf, len); 146 147 ret = i2c_transfer(i2c_adap, &msg, 1); 148 149 if (ret != 1) { 150 ci_dbg_print("%s: i2c write error, Reg=[0x%02x], Status=%d\n", 151 __func__, reg, ret); 152 return -1; 153 } 154 155 return 0; 156 } 157 158 static int netup_ci_get_mem(struct cx23885_dev *dev) 159 { 160 int mem; 161 unsigned long timeout = jiffies + msecs_to_jiffies(1); 162 163 for (;;) { 164 mem = cx_read(MC417_RWD); 165 if ((mem & NETUP_ACK) == 0) 166 break; 167 if (time_after(jiffies, timeout)) 168 break; 169 udelay(1); 170 } 171 172 cx_set(MC417_RWD, NETUP_CTRL_OFF); 173 174 return mem & 0xff; 175 } 176 177 static int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, 178 u8 flag, u8 read, int addr, u8 data) 179 { 180 struct netup_ci_state *state = en50221->data; 181 struct cx23885_tsport *port = state->priv; 182 struct cx23885_dev *dev = port->dev; 183 184 u8 store; 185 int mem; 186 int ret; 187 188 if (0 != slot) 189 return -EINVAL; 190 191 if (state->current_ci_flag != flag) { 192 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr, 193 0, &store, 1); 194 if (ret != 0) 195 return ret; 196 197 store &= ~0x0c; 198 store |= flag; 199 200 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 201 0, &store, 1); 202 if (ret != 0) 203 return ret; 204 } 205 state->current_ci_flag = flag; 206 207 mutex_lock(&dev->gpio_lock); 208 209 /* write addr */ 210 cx_write(MC417_OEN, NETUP_EN_ALL); 211 cx_write(MC417_RWD, NETUP_CTRL_OFF | 212 NETUP_ADLO | (0xff & addr)); 213 cx_clear(MC417_RWD, NETUP_ADLO); 214 cx_write(MC417_RWD, NETUP_CTRL_OFF | 215 NETUP_ADHI | (0xff & (addr >> 8))); 216 cx_clear(MC417_RWD, NETUP_ADHI); 217 218 if (read) { /* data in */ 219 cx_write(MC417_OEN, NETUP_EN_ALL | NETUP_DATA); 220 } else /* data out */ 221 cx_write(MC417_RWD, NETUP_CTRL_OFF | data); 222 223 /* choose chip */ 224 cx_clear(MC417_RWD, 225 (state->ci_i2c_addr == 0x40) ? NETUP_CS0 : NETUP_CS1); 226 /* read/write */ 227 cx_clear(MC417_RWD, (read) ? NETUP_RD : NETUP_WR); 228 mem = netup_ci_get_mem(dev); 229 230 mutex_unlock(&dev->gpio_lock); 231 232 if (!read) 233 if (mem < 0) 234 return -EREMOTEIO; 235 236 ci_dbg_print("%s: %s: chipaddr=[0x%x] addr=[0x%02x], %s=%x\n", __func__, 237 (read) ? "read" : "write", state->ci_i2c_addr, addr, 238 (flag == NETUP_CI_CTL) ? "ctl" : "mem", 239 (read) ? mem : data); 240 241 if (read) 242 return mem; 243 244 return 0; 245 } 246 247 int netup_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221, 248 int slot, int addr) 249 { 250 return netup_ci_op_cam(en50221, slot, 0, NETUP_CI_RD, addr, 0); 251 } 252 253 int netup_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221, 254 int slot, int addr, u8 data) 255 { 256 return netup_ci_op_cam(en50221, slot, 0, 0, addr, data); 257 } 258 259 int netup_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, 260 u8 addr) 261 { 262 return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 263 NETUP_CI_RD, addr, 0); 264 } 265 266 int netup_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, 267 u8 addr, u8 data) 268 { 269 return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 0, addr, data); 270 } 271 272 int netup_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot) 273 { 274 struct netup_ci_state *state = en50221->data; 275 u8 buf = 0x80; 276 int ret; 277 278 if (0 != slot) 279 return -EINVAL; 280 281 udelay(500); 282 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 283 0, &buf, 1); 284 285 if (ret != 0) 286 return ret; 287 288 udelay(500); 289 290 buf = 0x00; 291 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 292 0, &buf, 1); 293 294 msleep(1000); 295 dvb_ca_en50221_camready_irq(&state->ca, 0); 296 297 return 0; 298 299 } 300 301 int netup_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot) 302 { 303 /* not implemented */ 304 return 0; 305 } 306 307 static int netup_ci_set_irq(struct dvb_ca_en50221 *en50221, u8 irq_mode) 308 { 309 struct netup_ci_state *state = en50221->data; 310 int ret; 311 312 if (irq_mode == state->current_irq_mode) 313 return 0; 314 315 ci_dbg_print("%s: chipaddr=[0x%x] setting ci IRQ to [0x%x] \n", 316 __func__, state->ci_i2c_addr, irq_mode); 317 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 318 0x1b, &irq_mode, 1); 319 320 if (ret != 0) 321 return ret; 322 323 state->current_irq_mode = irq_mode; 324 325 return 0; 326 } 327 328 int netup_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221, int slot) 329 { 330 struct netup_ci_state *state = en50221->data; 331 u8 buf; 332 333 if (0 != slot) 334 return -EINVAL; 335 336 netup_read_i2c(state->i2c_adap, state->ci_i2c_addr, 337 0, &buf, 1); 338 buf |= 0x60; 339 340 return netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 341 0, &buf, 1); 342 } 343 344 /* work handler */ 345 static void netup_read_ci_status(struct work_struct *work) 346 { 347 struct netup_ci_state *state = 348 container_of(work, struct netup_ci_state, work); 349 u8 buf[33]; 350 int ret; 351 352 /* CAM module IRQ processing. fast operation */ 353 dvb_ca_en50221_frda_irq(&state->ca, 0); 354 355 /* CAM module INSERT/REMOVE processing. slow operation because of i2c 356 * transfers */ 357 if (time_after(jiffies, state->next_status_checked_time) 358 || !state->status) { 359 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr, 360 0, &buf[0], 33); 361 362 state->next_status_checked_time = jiffies 363 + msecs_to_jiffies(1000); 364 365 if (ret != 0) 366 return; 367 368 ci_dbg_print("%s: Slot Status Addr=[0x%04x], Reg=[0x%02x], data=%02x, TS config = %02x\n", 369 __func__, state->ci_i2c_addr, 0, buf[0], buf[0]); 370 371 372 if (buf[0] & 1) 373 state->status = DVB_CA_EN50221_POLL_CAM_PRESENT | 374 DVB_CA_EN50221_POLL_CAM_READY; 375 else 376 state->status = 0; 377 } 378 } 379 380 /* CI irq handler */ 381 int netup_ci_slot_status(struct cx23885_dev *dev, u32 pci_status) 382 { 383 struct cx23885_tsport *port = NULL; 384 struct netup_ci_state *state = NULL; 385 386 ci_dbg_print("%s:\n", __func__); 387 388 if (0 == (pci_status & (PCI_MSK_GPIO0 | PCI_MSK_GPIO1))) 389 return 0; 390 391 if (pci_status & PCI_MSK_GPIO0) { 392 port = &dev->ts1; 393 state = port->port_priv; 394 schedule_work(&state->work); 395 ci_dbg_print("%s: Wakeup CI0\n", __func__); 396 } 397 398 if (pci_status & PCI_MSK_GPIO1) { 399 port = &dev->ts2; 400 state = port->port_priv; 401 schedule_work(&state->work); 402 ci_dbg_print("%s: Wakeup CI1\n", __func__); 403 } 404 405 return 1; 406 } 407 408 int netup_poll_ci_slot_status(struct dvb_ca_en50221 *en50221, 409 int slot, int open) 410 { 411 struct netup_ci_state *state = en50221->data; 412 413 if (0 != slot) 414 return -EINVAL; 415 416 netup_ci_set_irq(en50221, open ? (NETUP_IRQ_DETAM | ci_irq_flags()) 417 : NETUP_IRQ_DETAM); 418 419 return state->status; 420 } 421 422 int netup_ci_init(struct cx23885_tsport *port) 423 { 424 struct netup_ci_state *state; 425 u8 cimax_init[34] = { 426 0x00, /* module A control*/ 427 0x00, /* auto select mask high A */ 428 0x00, /* auto select mask low A */ 429 0x00, /* auto select pattern high A */ 430 0x00, /* auto select pattern low A */ 431 0x44, /* memory access time A */ 432 0x00, /* invert input A */ 433 0x00, /* RFU */ 434 0x00, /* RFU */ 435 0x00, /* module B control*/ 436 0x00, /* auto select mask high B */ 437 0x00, /* auto select mask low B */ 438 0x00, /* auto select pattern high B */ 439 0x00, /* auto select pattern low B */ 440 0x44, /* memory access time B */ 441 0x00, /* invert input B */ 442 0x00, /* RFU */ 443 0x00, /* RFU */ 444 0x00, /* auto select mask high Ext */ 445 0x00, /* auto select mask low Ext */ 446 0x00, /* auto select pattern high Ext */ 447 0x00, /* auto select pattern low Ext */ 448 0x00, /* RFU */ 449 0x02, /* destination - module A */ 450 0x01, /* power on (use it like store place) */ 451 0x00, /* RFU */ 452 0x00, /* int status read only */ 453 ci_irq_flags() | NETUP_IRQ_DETAM, /* DETAM, IRQAM unmasked */ 454 0x05, /* EXTINT=active-high, INT=push-pull */ 455 0x00, /* USCG1 */ 456 0x04, /* ack active low */ 457 0x00, /* LOCK = 0 */ 458 0x33, /* serial mode, rising in, rising out, MSB first*/ 459 0x31, /* synchronization */ 460 }; 461 int ret; 462 463 ci_dbg_print("%s\n", __func__); 464 state = kzalloc(sizeof(struct netup_ci_state), GFP_KERNEL); 465 if (!state) { 466 ci_dbg_print("%s: Unable create CI structure!\n", __func__); 467 ret = -ENOMEM; 468 goto err; 469 } 470 471 port->port_priv = state; 472 473 switch (port->nr) { 474 case 1: 475 state->ci_i2c_addr = 0x40; 476 break; 477 case 2: 478 state->ci_i2c_addr = 0x41; 479 break; 480 } 481 482 state->i2c_adap = &port->dev->i2c_bus[0].i2c_adap; 483 state->ca.owner = THIS_MODULE; 484 state->ca.read_attribute_mem = netup_ci_read_attribute_mem; 485 state->ca.write_attribute_mem = netup_ci_write_attribute_mem; 486 state->ca.read_cam_control = netup_ci_read_cam_ctl; 487 state->ca.write_cam_control = netup_ci_write_cam_ctl; 488 state->ca.slot_reset = netup_ci_slot_reset; 489 state->ca.slot_shutdown = netup_ci_slot_shutdown; 490 state->ca.slot_ts_enable = netup_ci_slot_ts_ctl; 491 state->ca.poll_slot_status = netup_poll_ci_slot_status; 492 state->ca.data = state; 493 state->priv = port; 494 state->current_irq_mode = ci_irq_flags() | NETUP_IRQ_DETAM; 495 496 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 497 0, &cimax_init[0], 34); 498 /* lock registers */ 499 ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 500 0x1f, &cimax_init[0x18], 1); 501 /* power on slots */ 502 ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 503 0x18, &cimax_init[0x18], 1); 504 505 if (0 != ret) 506 goto err; 507 508 ret = dvb_ca_en50221_init(&port->frontends.adapter, 509 &state->ca, 510 /* flags */ 0, 511 /* n_slots */ 1); 512 if (0 != ret) 513 goto err; 514 515 INIT_WORK(&state->work, netup_read_ci_status); 516 schedule_work(&state->work); 517 518 ci_dbg_print("%s: CI initialized!\n", __func__); 519 520 return 0; 521 err: 522 ci_dbg_print("%s: Cannot initialize CI: Error %d.\n", __func__, ret); 523 kfree(state); 524 return ret; 525 } 526 527 void netup_ci_exit(struct cx23885_tsport *port) 528 { 529 struct netup_ci_state *state; 530 531 if (NULL == port) 532 return; 533 534 state = (struct netup_ci_state *)port->port_priv; 535 if (NULL == state) 536 return; 537 538 if (NULL == state->ca.data) 539 return; 540 541 dvb_ca_en50221_release(&state->ca); 542 kfree(state); 543 } 544