1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * cimax2.c 4 * 5 * CIMax2(R) SP2 driver in conjunction with NetUp Dual DVB-S2 CI card 6 * 7 * Copyright (C) 2009 NetUP Inc. 8 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> 9 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru> 10 */ 11 12#include "cx23885.h" 13#include "cimax2.h" 14#include <media/dvb_ca_en50221.h> 15 16/* Max transfer size done by I2C transfer functions */ 17#define MAX_XFER_SIZE 64 18 19/**** Bit definitions for MC417_RWD and MC417_OEN registers *** 20 bits 31-16 21+-----------+ 22| Reserved | 23+-----------+ 24 bit 15 bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 25+-------+-------+-------+-------+-------+-------+-------+-------+ 26| WR# | RD# | | ACK# | ADHI | ADLO | CS1# | CS0# | 27+-------+-------+-------+-------+-------+-------+-------+-------+ 28 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 29+-------+-------+-------+-------+-------+-------+-------+-------+ 30| DATA7| DATA6| DATA5| DATA4| DATA3| DATA2| DATA1| DATA0| 31+-------+-------+-------+-------+-------+-------+-------+-------+ 32***/ 33/* MC417 */ 34#define NETUP_DATA 0x000000ff 35#define NETUP_WR 0x00008000 36#define NETUP_RD 0x00004000 37#define NETUP_ACK 0x00001000 38#define NETUP_ADHI 0x00000800 39#define NETUP_ADLO 0x00000400 40#define NETUP_CS1 0x00000200 41#define NETUP_CS0 0x00000100 42#define NETUP_EN_ALL 0x00001000 43#define NETUP_CTRL_OFF (NETUP_CS1 | NETUP_CS0 | NETUP_WR | NETUP_RD) 44#define NETUP_CI_CTL 0x04 45#define NETUP_CI_RD 1 46 47#define NETUP_IRQ_DETAM 0x1 48#define NETUP_IRQ_IRQAM 0x4 49 50static unsigned int ci_dbg; 51module_param(ci_dbg, int, 0644); 52MODULE_PARM_DESC(ci_dbg, "Enable CI debugging"); 53 54static unsigned int ci_irq_enable; 55module_param(ci_irq_enable, int, 0644); 56MODULE_PARM_DESC(ci_irq_enable, "Enable IRQ from CAM"); 57 58#define ci_dbg_print(fmt, args...) \ 59 do { \ 60 if (ci_dbg) \ 61 printk(KERN_DEBUG pr_fmt("%s: " fmt), \ 62 __func__, ##args); \ 63 } while (0) 64 65#define ci_irq_flags() (ci_irq_enable ? NETUP_IRQ_IRQAM : 0) 66 67/* stores all private variables for communication with CI */ 68struct 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 u8 current_irq_mode; 77 int current_ci_flag; 78 unsigned long next_status_checked_time; 79}; 80 81 82static int netup_read_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg, 83 u8 *buf, int len) 84{ 85 int ret; 86 struct i2c_msg msg[] = { 87 { 88 .addr = addr, 89 .flags = 0, 90 .buf = ®, 91 .len = 1 92 }, { 93 .addr = addr, 94 .flags = I2C_M_RD, 95 .buf = buf, 96 .len = len 97 } 98 }; 99 100 ret = i2c_transfer(i2c_adap, msg, 2); 101 102 if (ret != 2) { 103 ci_dbg_print("%s: i2c read error, Reg = 0x%02x, Status = %d\n", 104 __func__, reg, ret); 105 106 return -1; 107 } 108 109 ci_dbg_print("%s: i2c read Addr=0x%04x, Reg = 0x%02x, data = %02x\n", 110 __func__, addr, reg, buf[0]); 111 112 return 0; 113} 114 115static int netup_write_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg, 116 u8 *buf, int len) 117{ 118 int ret; 119 u8 buffer[MAX_XFER_SIZE]; 120 121 struct i2c_msg msg = { 122 .addr = addr, 123 .flags = 0, 124 .buf = &buffer[0], 125 .len = len + 1 126 }; 127 128 if (1 + len > sizeof(buffer)) { 129 pr_warn("%s: i2c wr reg=%04x: len=%d is too big!\n", 130 KBUILD_MODNAME, reg, len); 131 return -EINVAL; 132 } 133 134 buffer[0] = reg; 135 memcpy(&buffer[1], buf, len); 136 137 ret = i2c_transfer(i2c_adap, &msg, 1); 138 139 if (ret != 1) { 140 ci_dbg_print("%s: i2c write error, Reg=[0x%02x], Status=%d\n", 141 __func__, reg, ret); 142 return -1; 143 } 144 145 return 0; 146} 147 148static int netup_ci_get_mem(struct cx23885_dev *dev) 149{ 150 int mem; 151 unsigned long timeout = jiffies + msecs_to_jiffies(1); 152 153 for (;;) { 154 mem = cx_read(MC417_RWD); 155 if ((mem & NETUP_ACK) == 0) 156 break; 157 if (time_after(jiffies, timeout)) 158 break; 159 udelay(1); 160 } 161 162 cx_set(MC417_RWD, NETUP_CTRL_OFF); 163 164 return mem & 0xff; 165} 166 167static int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, 168 u8 flag, u8 read, int addr, u8 data) 169{ 170 struct netup_ci_state *state = en50221->data; 171 struct cx23885_tsport *port = state->priv; 172 struct cx23885_dev *dev = port->dev; 173 174 u8 store; 175 int mem; 176 int ret; 177 178 if (0 != slot) 179 return -EINVAL; 180 181 if (state->current_ci_flag != flag) { 182 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr, 183 0, &store, 1); 184 if (ret != 0) 185 return ret; 186 187 store &= ~0x0c; 188 store |= flag; 189 190 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 191 0, &store, 1); 192 if (ret != 0) 193 return ret; 194 } 195 state->current_ci_flag = flag; 196 197 mutex_lock(&dev->gpio_lock); 198 199 /* write addr */ 200 cx_write(MC417_OEN, NETUP_EN_ALL); 201 cx_write(MC417_RWD, NETUP_CTRL_OFF | 202 NETUP_ADLO | (0xff & addr)); 203 cx_clear(MC417_RWD, NETUP_ADLO); 204 cx_write(MC417_RWD, NETUP_CTRL_OFF | 205 NETUP_ADHI | (0xff & (addr >> 8))); 206 cx_clear(MC417_RWD, NETUP_ADHI); 207 208 if (read) { /* data in */ 209 cx_write(MC417_OEN, NETUP_EN_ALL | NETUP_DATA); 210 } else /* data out */ 211 cx_write(MC417_RWD, NETUP_CTRL_OFF | data); 212 213 /* choose chip */ 214 cx_clear(MC417_RWD, 215 (state->ci_i2c_addr == 0x40) ? NETUP_CS0 : NETUP_CS1); 216 /* read/write */ 217 cx_clear(MC417_RWD, (read) ? NETUP_RD : NETUP_WR); 218 mem = netup_ci_get_mem(dev); 219 220 mutex_unlock(&dev->gpio_lock); 221 222 if (!read) 223 if (mem < 0) 224 return -EREMOTEIO; 225 226 ci_dbg_print("%s: %s: chipaddr=[0x%x] addr=[0x%02x], %s=%x\n", __func__, 227 (read) ? "read" : "write", state->ci_i2c_addr, addr, 228 (flag == NETUP_CI_CTL) ? "ctl" : "mem", 229 (read) ? mem : data); 230 231 if (read) 232 return mem; 233 234 return 0; 235} 236 237int netup_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221, 238 int slot, int addr) 239{ 240 return netup_ci_op_cam(en50221, slot, 0, NETUP_CI_RD, addr, 0); 241} 242 243int netup_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221, 244 int slot, int addr, u8 data) 245{ 246 return netup_ci_op_cam(en50221, slot, 0, 0, addr, data); 247} 248 249int netup_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, 250 u8 addr) 251{ 252 return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 253 NETUP_CI_RD, addr, 0); 254} 255 256int netup_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, 257 u8 addr, u8 data) 258{ 259 return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 0, addr, data); 260} 261 262int netup_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot) 263{ 264 struct netup_ci_state *state = en50221->data; 265 u8 buf = 0x80; 266 int ret; 267 268 if (0 != slot) 269 return -EINVAL; 270 271 udelay(500); 272 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 273 0, &buf, 1); 274 275 if (ret != 0) 276 return ret; 277 278 udelay(500); 279 280 buf = 0x00; 281 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 282 0, &buf, 1); 283 284 msleep(1000); 285 dvb_ca_en50221_camready_irq(&state->ca, 0); 286 287 return 0; 288 289} 290 291int netup_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot) 292{ 293 /* not implemented */ 294 return 0; 295} 296 297static int netup_ci_set_irq(struct dvb_ca_en50221 *en50221, u8 irq_mode) 298{ 299 struct netup_ci_state *state = en50221->data; 300 int ret; 301 302 if (irq_mode == state->current_irq_mode) 303 return 0; 304 305 ci_dbg_print("%s: chipaddr=[0x%x] setting ci IRQ to [0x%x] \n", 306 __func__, state->ci_i2c_addr, irq_mode); 307 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 308 0x1b, &irq_mode, 1); 309 310 if (ret != 0) 311 return ret; 312 313 state->current_irq_mode = irq_mode; 314 315 return 0; 316} 317 318int netup_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221, int slot) 319{ 320 struct netup_ci_state *state = en50221->data; 321 u8 buf; 322 323 if (0 != slot) 324 return -EINVAL; 325 326 netup_read_i2c(state->i2c_adap, state->ci_i2c_addr, 327 0, &buf, 1); 328 buf |= 0x60; 329 330 return netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 331 0, &buf, 1); 332} 333 334/* work handler */ 335static void netup_read_ci_status(struct work_struct *work) 336{ 337 struct netup_ci_state *state = 338 container_of(work, struct netup_ci_state, work); 339 u8 buf[33]; 340 int ret; 341 342 /* CAM module IRQ processing. fast operation */ 343 dvb_ca_en50221_frda_irq(&state->ca, 0); 344 345 /* CAM module INSERT/REMOVE processing. slow operation because of i2c 346 * transfers */ 347 if (time_after(jiffies, state->next_status_checked_time) 348 || !state->status) { 349 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr, 350 0, &buf[0], 33); 351 352 state->next_status_checked_time = jiffies 353 + msecs_to_jiffies(1000); 354 355 if (ret != 0) 356 return; 357 358 ci_dbg_print("%s: Slot Status Addr=[0x%04x], Reg=[0x%02x], data=%02x, TS config = %02x\n", 359 __func__, state->ci_i2c_addr, 0, buf[0], buf[0]); 360 361 362 if (buf[0] & 1) 363 state->status = DVB_CA_EN50221_POLL_CAM_PRESENT | 364 DVB_CA_EN50221_POLL_CAM_READY; 365 else 366 state->status = 0; 367 } 368} 369 370/* CI irq handler */ 371int netup_ci_slot_status(struct cx23885_dev *dev, u32 pci_status) 372{ 373 struct cx23885_tsport *port = NULL; 374 struct netup_ci_state *state = NULL; 375 376 ci_dbg_print("%s:\n", __func__); 377 378 if (0 == (pci_status & (PCI_MSK_GPIO0 | PCI_MSK_GPIO1))) 379 return 0; 380 381 if (pci_status & PCI_MSK_GPIO0) { 382 port = &dev->ts1; 383 state = port->port_priv; 384 schedule_work(&state->work); 385 ci_dbg_print("%s: Wakeup CI0\n", __func__); 386 } 387 388 if (pci_status & PCI_MSK_GPIO1) { 389 port = &dev->ts2; 390 state = port->port_priv; 391 schedule_work(&state->work); 392 ci_dbg_print("%s: Wakeup CI1\n", __func__); 393 } 394 395 return 1; 396} 397 398int netup_poll_ci_slot_status(struct dvb_ca_en50221 *en50221, 399 int slot, int open) 400{ 401 struct netup_ci_state *state = en50221->data; 402 403 if (0 != slot) 404 return -EINVAL; 405 406 netup_ci_set_irq(en50221, open ? (NETUP_IRQ_DETAM | ci_irq_flags()) 407 : NETUP_IRQ_DETAM); 408 409 return state->status; 410} 411 412int netup_ci_init(struct cx23885_tsport *port) 413{ 414 struct netup_ci_state *state; 415 u8 cimax_init[34] = { 416 0x00, /* module A control*/ 417 0x00, /* auto select mask high A */ 418 0x00, /* auto select mask low A */ 419 0x00, /* auto select pattern high A */ 420 0x00, /* auto select pattern low A */ 421 0x44, /* memory access time A */ 422 0x00, /* invert input A */ 423 0x00, /* RFU */ 424 0x00, /* RFU */ 425 0x00, /* module B control*/ 426 0x00, /* auto select mask high B */ 427 0x00, /* auto select mask low B */ 428 0x00, /* auto select pattern high B */ 429 0x00, /* auto select pattern low B */ 430 0x44, /* memory access time B */ 431 0x00, /* invert input B */ 432 0x00, /* RFU */ 433 0x00, /* RFU */ 434 0x00, /* auto select mask high Ext */ 435 0x00, /* auto select mask low Ext */ 436 0x00, /* auto select pattern high Ext */ 437 0x00, /* auto select pattern low Ext */ 438 0x00, /* RFU */ 439 0x02, /* destination - module A */ 440 0x01, /* power on (use it like store place) */ 441 0x00, /* RFU */ 442 0x00, /* int status read only */ 443 ci_irq_flags() | NETUP_IRQ_DETAM, /* DETAM, IRQAM unmasked */ 444 0x05, /* EXTINT=active-high, INT=push-pull */ 445 0x00, /* USCG1 */ 446 0x04, /* ack active low */ 447 0x00, /* LOCK = 0 */ 448 0x33, /* serial mode, rising in, rising out, MSB first*/ 449 0x31, /* synchronization */ 450 }; 451 int ret; 452 453 ci_dbg_print("%s\n", __func__); 454 state = kzalloc(sizeof(struct netup_ci_state), GFP_KERNEL); 455 if (!state) { 456 ci_dbg_print("%s: Unable create CI structure!\n", __func__); 457 ret = -ENOMEM; 458 goto err; 459 } 460 461 port->port_priv = state; 462 463 switch (port->nr) { 464 case 1: 465 state->ci_i2c_addr = 0x40; 466 break; 467 case 2: 468 state->ci_i2c_addr = 0x41; 469 break; 470 } 471 472 state->i2c_adap = &port->dev->i2c_bus[0].i2c_adap; 473 state->ca.owner = THIS_MODULE; 474 state->ca.read_attribute_mem = netup_ci_read_attribute_mem; 475 state->ca.write_attribute_mem = netup_ci_write_attribute_mem; 476 state->ca.read_cam_control = netup_ci_read_cam_ctl; 477 state->ca.write_cam_control = netup_ci_write_cam_ctl; 478 state->ca.slot_reset = netup_ci_slot_reset; 479 state->ca.slot_shutdown = netup_ci_slot_shutdown; 480 state->ca.slot_ts_enable = netup_ci_slot_ts_ctl; 481 state->ca.poll_slot_status = netup_poll_ci_slot_status; 482 state->ca.data = state; 483 state->priv = port; 484 state->current_irq_mode = ci_irq_flags() | NETUP_IRQ_DETAM; 485 486 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 487 0, &cimax_init[0], 34); 488 /* lock registers */ 489 ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 490 0x1f, &cimax_init[0x18], 1); 491 /* power on slots */ 492 ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr, 493 0x18, &cimax_init[0x18], 1); 494 495 if (0 != ret) 496 goto err; 497 498 ret = dvb_ca_en50221_init(&port->frontends.adapter, 499 &state->ca, 500 /* flags */ 0, 501 /* n_slots */ 1); 502 if (0 != ret) 503 goto err; 504 505 INIT_WORK(&state->work, netup_read_ci_status); 506 schedule_work(&state->work); 507 508 ci_dbg_print("%s: CI initialized!\n", __func__); 509 510 return 0; 511err: 512 ci_dbg_print("%s: Cannot initialize CI: Error %d.\n", __func__, ret); 513 kfree(state); 514 return ret; 515} 516 517void netup_ci_exit(struct cx23885_tsport *port) 518{ 519 struct netup_ci_state *state; 520 521 if (NULL == port) 522 return; 523 524 state = (struct netup_ci_state *)port->port_priv; 525 if (NULL == state) 526 return; 527 528 if (NULL == state->ca.data) 529 return; 530 531 dvb_ca_en50221_release(&state->ca); 532 kfree(state); 533} 534