1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * CIMaX SP2/SP2HF (Atmel T90FJR) CI driver 4 * 5 * Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi> 6 * 7 * Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual 8 * DVB-S2 CI card (cimax2) with following copyrights: 9 * 10 * Copyright (C) 2009 NetUP Inc. 11 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> 12 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru> 13 */ 14 15 #include "sp2_priv.h" 16 17 static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len) 18 { 19 int ret; 20 struct i2c_client *client = s->client; 21 struct i2c_adapter *adap = client->adapter; 22 struct i2c_msg msg[] = { 23 { 24 .addr = client->addr, 25 .flags = 0, 26 .buf = ®, 27 .len = 1 28 }, { 29 .addr = client->addr, 30 .flags = I2C_M_RD, 31 .buf = buf, 32 .len = len 33 } 34 }; 35 36 ret = i2c_transfer(adap, msg, 2); 37 38 if (ret != 2) { 39 dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n", 40 reg, ret); 41 if (ret < 0) 42 return ret; 43 else 44 return -EIO; 45 } 46 47 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n", 48 client->addr, reg, buf[0]); 49 50 return 0; 51 } 52 53 static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len) 54 { 55 int ret; 56 u8 buffer[35]; 57 struct i2c_client *client = s->client; 58 struct i2c_adapter *adap = client->adapter; 59 struct i2c_msg msg = { 60 .addr = client->addr, 61 .flags = 0, 62 .buf = &buffer[0], 63 .len = len + 1 64 }; 65 66 if ((len + 1) > sizeof(buffer)) { 67 dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n", 68 reg, len); 69 return -EINVAL; 70 } 71 72 buffer[0] = reg; 73 memcpy(&buffer[1], buf, len); 74 75 ret = i2c_transfer(adap, &msg, 1); 76 77 if (ret != 1) { 78 dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n", 79 reg, ret); 80 if (ret < 0) 81 return ret; 82 else 83 return -EIO; 84 } 85 86 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n", 87 client->addr, reg, len, buf); 88 89 return 0; 90 } 91 92 static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs, 93 u8 read, int addr, u8 data) 94 { 95 struct sp2 *s = en50221->data; 96 u8 store; 97 int mem, ret; 98 int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control; 99 100 if (slot != 0) 101 return -EINVAL; 102 103 /* 104 * change module access type between IO space and attribute memory 105 * when needed 106 */ 107 if (s->module_access_type != acs) { 108 ret = sp2_read_i2c(s, 0x00, &store, 1); 109 110 if (ret) 111 return ret; 112 113 store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0); 114 store |= acs; 115 116 ret = sp2_write_i2c(s, 0x00, &store, 1); 117 if (ret) 118 return ret; 119 } 120 121 s->module_access_type = acs; 122 123 /* implementation of ci_op_cam is device specific */ 124 if (ci_op_cam) { 125 ret = ci_op_cam(s->priv, read, addr, data, &mem); 126 } else { 127 dev_err(&s->client->dev, "callback not defined"); 128 return -EINVAL; 129 } 130 131 if (ret) 132 return ret; 133 134 dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x", 135 (read) ? "read" : "write", slot, addr, 136 (acs == SP2_CI_ATTR_ACS) ? "attr" : "io", 137 (read) ? mem : data); 138 139 if (read) 140 return mem; 141 else 142 return 0; 143 144 } 145 146 int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221, 147 int slot, int addr) 148 { 149 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS, 150 SP2_CI_RD, addr, 0); 151 } 152 153 int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221, 154 int slot, int addr, u8 data) 155 { 156 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS, 157 SP2_CI_WR, addr, data); 158 } 159 160 int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221, 161 int slot, u8 addr) 162 { 163 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS, 164 SP2_CI_RD, addr, 0); 165 } 166 167 int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221, 168 int slot, u8 addr, u8 data) 169 { 170 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS, 171 SP2_CI_WR, addr, data); 172 } 173 174 int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot) 175 { 176 struct sp2 *s = en50221->data; 177 u8 buf; 178 int ret; 179 180 dev_dbg(&s->client->dev, "slot: %d\n", slot); 181 182 if (slot != 0) 183 return -EINVAL; 184 185 /* RST on */ 186 buf = SP2_MOD_CTL_RST; 187 ret = sp2_write_i2c(s, 0x00, &buf, 1); 188 189 if (ret) 190 return ret; 191 192 usleep_range(500, 600); 193 194 /* RST off */ 195 buf = 0x00; 196 ret = sp2_write_i2c(s, 0x00, &buf, 1); 197 198 if (ret) 199 return ret; 200 201 msleep(1000); 202 203 return 0; 204 } 205 206 int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot) 207 { 208 struct sp2 *s = en50221->data; 209 210 dev_dbg(&s->client->dev, "slot:%d\n", slot); 211 212 /* not implemented */ 213 return 0; 214 } 215 216 int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot) 217 { 218 struct sp2 *s = en50221->data; 219 u8 buf; 220 221 dev_dbg(&s->client->dev, "slot:%d\n", slot); 222 223 if (slot != 0) 224 return -EINVAL; 225 226 sp2_read_i2c(s, 0x00, &buf, 1); 227 228 /* disable bypass and enable TS */ 229 buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN); 230 return sp2_write_i2c(s, 0, &buf, 1); 231 } 232 233 int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221, 234 int slot, int open) 235 { 236 struct sp2 *s = en50221->data; 237 u8 buf[2]; 238 int ret; 239 240 dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open); 241 242 /* 243 * CAM module INSERT/REMOVE processing. Slow operation because of i2c 244 * transfers. Throttle read to one per sec. 245 */ 246 if (time_after(jiffies, s->next_status_checked_time)) { 247 ret = sp2_read_i2c(s, 0x00, buf, 1); 248 s->next_status_checked_time = jiffies + msecs_to_jiffies(1000); 249 250 if (ret) 251 return 0; 252 253 if (buf[0] & SP2_MOD_CTL_DET) 254 s->status = DVB_CA_EN50221_POLL_CAM_PRESENT | 255 DVB_CA_EN50221_POLL_CAM_READY; 256 else 257 s->status = 0; 258 } 259 260 return s->status; 261 } 262 263 static int sp2_init(struct sp2 *s) 264 { 265 int ret = 0; 266 u8 buf; 267 u8 cimax_init[34] = { 268 0x00, /* module A control*/ 269 0x00, /* auto select mask high A */ 270 0x00, /* auto select mask low A */ 271 0x00, /* auto select pattern high A */ 272 0x00, /* auto select pattern low A */ 273 0x44, /* memory access time A, 600 ns */ 274 0x00, /* invert input A */ 275 0x00, /* RFU */ 276 0x00, /* RFU */ 277 0x00, /* module B control*/ 278 0x00, /* auto select mask high B */ 279 0x00, /* auto select mask low B */ 280 0x00, /* auto select pattern high B */ 281 0x00, /* auto select pattern low B */ 282 0x44, /* memory access time B, 600 ns */ 283 0x00, /* invert input B */ 284 0x00, /* RFU */ 285 0x00, /* RFU */ 286 0x00, /* auto select mask high Ext */ 287 0x00, /* auto select mask low Ext */ 288 0x00, /* auto select pattern high Ext */ 289 0x00, /* auto select pattern low Ext */ 290 0x00, /* RFU */ 291 0x02, /* destination - module A */ 292 0x01, /* power control reg, VCC power on */ 293 0x00, /* RFU */ 294 0x00, /* int status read only */ 295 0x00, /* Interrupt Mask Register */ 296 0x05, /* EXTINT=active-high, INT=push-pull */ 297 0x00, /* USCG1 */ 298 0x04, /* ack active low */ 299 0x00, /* LOCK = 0 */ 300 0x22, /* unknown */ 301 0x00, /* synchronization? */ 302 }; 303 304 dev_dbg(&s->client->dev, "\n"); 305 306 s->ca.owner = THIS_MODULE; 307 s->ca.read_attribute_mem = sp2_ci_read_attribute_mem; 308 s->ca.write_attribute_mem = sp2_ci_write_attribute_mem; 309 s->ca.read_cam_control = sp2_ci_read_cam_control; 310 s->ca.write_cam_control = sp2_ci_write_cam_control; 311 s->ca.slot_reset = sp2_ci_slot_reset; 312 s->ca.slot_shutdown = sp2_ci_slot_shutdown; 313 s->ca.slot_ts_enable = sp2_ci_slot_ts_enable; 314 s->ca.poll_slot_status = sp2_ci_poll_slot_status; 315 s->ca.data = s; 316 s->module_access_type = 0; 317 318 /* initialize all regs */ 319 ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34); 320 if (ret) 321 goto err; 322 323 /* lock registers */ 324 buf = 1; 325 ret = sp2_write_i2c(s, 0x1f, &buf, 1); 326 if (ret) 327 goto err; 328 329 /* power on slots */ 330 ret = sp2_write_i2c(s, 0x18, &buf, 1); 331 if (ret) 332 goto err; 333 334 ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1); 335 if (ret) 336 goto err; 337 338 return 0; 339 340 err: 341 dev_dbg(&s->client->dev, "init failed=%d\n", ret); 342 return ret; 343 } 344 345 static int sp2_exit(struct i2c_client *client) 346 { 347 struct sp2 *s; 348 349 dev_dbg(&client->dev, "\n"); 350 351 if (!client) 352 return 0; 353 354 s = i2c_get_clientdata(client); 355 if (!s) 356 return 0; 357 358 if (!s->ca.data) 359 return 0; 360 361 dvb_ca_en50221_release(&s->ca); 362 363 return 0; 364 } 365 366 static int sp2_probe(struct i2c_client *client) 367 { 368 struct sp2_config *cfg = client->dev.platform_data; 369 struct sp2 *s; 370 int ret; 371 372 dev_dbg(&client->dev, "\n"); 373 374 s = kzalloc(sizeof(*s), GFP_KERNEL); 375 if (!s) { 376 ret = -ENOMEM; 377 goto err; 378 } 379 380 s->client = client; 381 s->dvb_adap = cfg->dvb_adap; 382 s->priv = cfg->priv; 383 s->ci_control = cfg->ci_control; 384 385 i2c_set_clientdata(client, s); 386 387 ret = sp2_init(s); 388 if (ret) 389 goto err; 390 391 dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n"); 392 return 0; 393 err: 394 dev_dbg(&client->dev, "init failed=%d\n", ret); 395 kfree(s); 396 397 return ret; 398 } 399 400 static void sp2_remove(struct i2c_client *client) 401 { 402 struct sp2 *s = i2c_get_clientdata(client); 403 404 dev_dbg(&client->dev, "\n"); 405 sp2_exit(client); 406 kfree(s); 407 } 408 409 static const struct i2c_device_id sp2_id[] = { 410 {"sp2", 0}, 411 {} 412 }; 413 MODULE_DEVICE_TABLE(i2c, sp2_id); 414 415 static struct i2c_driver sp2_driver = { 416 .driver = { 417 .name = "sp2", 418 }, 419 .probe = sp2_probe, 420 .remove = sp2_remove, 421 .id_table = sp2_id, 422 }; 423 424 module_i2c_driver(sp2_driver); 425 426 MODULE_DESCRIPTION("CIMaX SP2/HF CI driver"); 427 MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>"); 428 MODULE_LICENSE("GPL"); 429