1 /* 2 * CIMaX SP2/SP2HF (Atmel T90FJR) CI driver 3 * 4 * Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi> 5 * 6 * Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual 7 * DVB-S2 CI card (cimax2) with following copyrights: 8 * 9 * Copyright (C) 2009 NetUP Inc. 10 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> 11 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru> 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 */ 23 24 #include "sp2_priv.h" 25 26 static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len) 27 { 28 int ret; 29 struct i2c_client *client = s->client; 30 struct i2c_adapter *adap = client->adapter; 31 struct i2c_msg msg[] = { 32 { 33 .addr = client->addr, 34 .flags = 0, 35 .buf = ®, 36 .len = 1 37 }, { 38 .addr = client->addr, 39 .flags = I2C_M_RD, 40 .buf = buf, 41 .len = len 42 } 43 }; 44 45 ret = i2c_transfer(adap, msg, 2); 46 47 if (ret != 2) { 48 dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n", 49 reg, ret); 50 if (ret < 0) 51 return ret; 52 else 53 return -EIO; 54 } 55 56 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n", 57 client->addr, reg, buf[0]); 58 59 return 0; 60 } 61 62 static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len) 63 { 64 int ret; 65 u8 buffer[35]; 66 struct i2c_client *client = s->client; 67 struct i2c_adapter *adap = client->adapter; 68 struct i2c_msg msg = { 69 .addr = client->addr, 70 .flags = 0, 71 .buf = &buffer[0], 72 .len = len + 1 73 }; 74 75 if ((len + 1) > sizeof(buffer)) { 76 dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n", 77 reg, len); 78 return -EINVAL; 79 } 80 81 buffer[0] = reg; 82 memcpy(&buffer[1], buf, len); 83 84 ret = i2c_transfer(adap, &msg, 1); 85 86 if (ret != 1) { 87 dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n", 88 reg, ret); 89 if (ret < 0) 90 return ret; 91 else 92 return -EIO; 93 } 94 95 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n", 96 client->addr, reg, len, buf); 97 98 return 0; 99 } 100 101 static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs, 102 u8 read, int addr, u8 data) 103 { 104 struct sp2 *s = en50221->data; 105 u8 store; 106 int mem, ret; 107 int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control; 108 109 if (slot != 0) 110 return -EINVAL; 111 112 /* 113 * change module access type between IO space and attribute memory 114 * when needed 115 */ 116 if (s->module_access_type != acs) { 117 ret = sp2_read_i2c(s, 0x00, &store, 1); 118 119 if (ret) 120 return ret; 121 122 store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0); 123 store |= acs; 124 125 ret = sp2_write_i2c(s, 0x00, &store, 1); 126 if (ret) 127 return ret; 128 } 129 130 s->module_access_type = acs; 131 132 /* implementation of ci_op_cam is device specific */ 133 if (ci_op_cam) { 134 ret = ci_op_cam(s->priv, read, addr, data, &mem); 135 } else { 136 dev_err(&s->client->dev, "callback not defined"); 137 return -EINVAL; 138 } 139 140 if (ret) 141 return ret; 142 143 dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x", 144 (read) ? "read" : "write", slot, addr, 145 (acs == SP2_CI_ATTR_ACS) ? "attr" : "io", 146 (read) ? mem : data); 147 148 if (read) 149 return mem; 150 else 151 return 0; 152 153 } 154 155 int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221, 156 int slot, int addr) 157 { 158 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS, 159 SP2_CI_RD, addr, 0); 160 } 161 162 int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221, 163 int slot, int addr, u8 data) 164 { 165 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS, 166 SP2_CI_WR, addr, data); 167 } 168 169 int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221, 170 int slot, u8 addr) 171 { 172 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS, 173 SP2_CI_RD, addr, 0); 174 } 175 176 int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221, 177 int slot, u8 addr, u8 data) 178 { 179 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS, 180 SP2_CI_WR, addr, data); 181 } 182 183 int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot) 184 { 185 struct sp2 *s = en50221->data; 186 u8 buf; 187 int ret; 188 189 dev_dbg(&s->client->dev, "slot: %d\n", slot); 190 191 if (slot != 0) 192 return -EINVAL; 193 194 /* RST on */ 195 buf = SP2_MOD_CTL_RST; 196 ret = sp2_write_i2c(s, 0x00, &buf, 1); 197 198 if (ret) 199 return ret; 200 201 usleep_range(500, 600); 202 203 /* RST off */ 204 buf = 0x00; 205 ret = sp2_write_i2c(s, 0x00, &buf, 1); 206 207 if (ret) 208 return ret; 209 210 msleep(1000); 211 212 return 0; 213 } 214 215 int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot) 216 { 217 struct sp2 *s = en50221->data; 218 219 dev_dbg(&s->client->dev, "slot:%d\n", slot); 220 221 /* not implemented */ 222 return 0; 223 } 224 225 int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot) 226 { 227 struct sp2 *s = en50221->data; 228 u8 buf; 229 230 dev_dbg(&s->client->dev, "slot:%d\n", slot); 231 232 if (slot != 0) 233 return -EINVAL; 234 235 sp2_read_i2c(s, 0x00, &buf, 1); 236 237 /* disable bypass and enable TS */ 238 buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN); 239 return sp2_write_i2c(s, 0, &buf, 1); 240 } 241 242 int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221, 243 int slot, int open) 244 { 245 struct sp2 *s = en50221->data; 246 u8 buf[2]; 247 int ret; 248 249 dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open); 250 251 /* 252 * CAM module INSERT/REMOVE processing. Slow operation because of i2c 253 * transfers. Throttle read to one per sec. 254 */ 255 if (time_after(jiffies, s->next_status_checked_time)) { 256 ret = sp2_read_i2c(s, 0x00, buf, 1); 257 s->next_status_checked_time = jiffies + msecs_to_jiffies(1000); 258 259 if (ret) 260 return 0; 261 262 if (buf[0] & SP2_MOD_CTL_DET) 263 s->status = DVB_CA_EN50221_POLL_CAM_PRESENT | 264 DVB_CA_EN50221_POLL_CAM_READY; 265 else 266 s->status = 0; 267 } 268 269 return s->status; 270 } 271 272 static int sp2_init(struct sp2 *s) 273 { 274 int ret = 0; 275 u8 buf; 276 u8 cimax_init[34] = { 277 0x00, /* module A control*/ 278 0x00, /* auto select mask high A */ 279 0x00, /* auto select mask low A */ 280 0x00, /* auto select pattern high A */ 281 0x00, /* auto select pattern low A */ 282 0x44, /* memory access time A, 600 ns */ 283 0x00, /* invert input A */ 284 0x00, /* RFU */ 285 0x00, /* RFU */ 286 0x00, /* module B control*/ 287 0x00, /* auto select mask high B */ 288 0x00, /* auto select mask low B */ 289 0x00, /* auto select pattern high B */ 290 0x00, /* auto select pattern low B */ 291 0x44, /* memory access time B, 600 ns */ 292 0x00, /* invert input B */ 293 0x00, /* RFU */ 294 0x00, /* RFU */ 295 0x00, /* auto select mask high Ext */ 296 0x00, /* auto select mask low Ext */ 297 0x00, /* auto select pattern high Ext */ 298 0x00, /* auto select pattern low Ext */ 299 0x00, /* RFU */ 300 0x02, /* destination - module A */ 301 0x01, /* power control reg, VCC power on */ 302 0x00, /* RFU */ 303 0x00, /* int status read only */ 304 0x00, /* Interrupt Mask Register */ 305 0x05, /* EXTINT=active-high, INT=push-pull */ 306 0x00, /* USCG1 */ 307 0x04, /* ack active low */ 308 0x00, /* LOCK = 0 */ 309 0x22, /* unknown */ 310 0x00, /* synchronization? */ 311 }; 312 313 dev_dbg(&s->client->dev, "\n"); 314 315 s->ca.owner = THIS_MODULE; 316 s->ca.read_attribute_mem = sp2_ci_read_attribute_mem; 317 s->ca.write_attribute_mem = sp2_ci_write_attribute_mem; 318 s->ca.read_cam_control = sp2_ci_read_cam_control; 319 s->ca.write_cam_control = sp2_ci_write_cam_control; 320 s->ca.slot_reset = sp2_ci_slot_reset; 321 s->ca.slot_shutdown = sp2_ci_slot_shutdown; 322 s->ca.slot_ts_enable = sp2_ci_slot_ts_enable; 323 s->ca.poll_slot_status = sp2_ci_poll_slot_status; 324 s->ca.data = s; 325 s->module_access_type = 0; 326 327 /* initialize all regs */ 328 ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34); 329 if (ret) 330 goto err; 331 332 /* lock registers */ 333 buf = 1; 334 ret = sp2_write_i2c(s, 0x1f, &buf, 1); 335 if (ret) 336 goto err; 337 338 /* power on slots */ 339 ret = sp2_write_i2c(s, 0x18, &buf, 1); 340 if (ret) 341 goto err; 342 343 ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1); 344 if (ret) 345 goto err; 346 347 return 0; 348 349 err: 350 dev_dbg(&s->client->dev, "init failed=%d\n", ret); 351 return ret; 352 } 353 354 static int sp2_exit(struct i2c_client *client) 355 { 356 struct sp2 *s; 357 358 dev_dbg(&client->dev, "\n"); 359 360 if (!client) 361 return 0; 362 363 s = i2c_get_clientdata(client); 364 if (!s) 365 return 0; 366 367 if (!s->ca.data) 368 return 0; 369 370 dvb_ca_en50221_release(&s->ca); 371 372 return 0; 373 } 374 375 static int sp2_probe(struct i2c_client *client, 376 const struct i2c_device_id *id) 377 { 378 struct sp2_config *cfg = client->dev.platform_data; 379 struct sp2 *s; 380 int ret; 381 382 dev_dbg(&client->dev, "\n"); 383 384 s = kzalloc(sizeof(*s), GFP_KERNEL); 385 if (!s) { 386 ret = -ENOMEM; 387 goto err; 388 } 389 390 s->client = client; 391 s->dvb_adap = cfg->dvb_adap; 392 s->priv = cfg->priv; 393 s->ci_control = cfg->ci_control; 394 395 i2c_set_clientdata(client, s); 396 397 ret = sp2_init(s); 398 if (ret) 399 goto err; 400 401 dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n"); 402 return 0; 403 err: 404 dev_dbg(&client->dev, "init failed=%d\n", ret); 405 kfree(s); 406 407 return ret; 408 } 409 410 static int sp2_remove(struct i2c_client *client) 411 { 412 struct sp2 *s = i2c_get_clientdata(client); 413 414 dev_dbg(&client->dev, "\n"); 415 sp2_exit(client); 416 kfree(s); 417 return 0; 418 } 419 420 static const struct i2c_device_id sp2_id[] = { 421 {"sp2", 0}, 422 {} 423 }; 424 MODULE_DEVICE_TABLE(i2c, sp2_id); 425 426 static struct i2c_driver sp2_driver = { 427 .driver = { 428 .name = "sp2", 429 }, 430 .probe = sp2_probe, 431 .remove = sp2_remove, 432 .id_table = sp2_id, 433 }; 434 435 module_i2c_driver(sp2_driver); 436 437 MODULE_DESCRIPTION("CIMaX SP2/HF CI driver"); 438 MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>"); 439 MODULE_LICENSE("GPL"); 440