LXR linux/drivers/media/dvb-frontends/sp2.c

   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
  26static 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 = &reg,
  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
  62static 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
 101static 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
 155int 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
 162int 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
 169int 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
 176int 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
 183int 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
 215int 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
 225int 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
 242int 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
 272static 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
 349err:
 350        dev_dbg(&s->client->dev, "init failed=%d\n", ret);
 351        return ret;
 352}
 353
 354static 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
 375static 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;
 403err:
 404        dev_dbg(&client->dev, "init failed=%d\n", ret);
 405        kfree(s);
 406
 407        return ret;
 408}
 409
 410static 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
 420static const struct i2c_device_id sp2_id[] = {
 421        {"sp2", 0},
 422        {}
 423};
 424MODULE_DEVICE_TABLE(i2c, sp2_id);
 425
 426static 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
 435module_i2c_driver(sp2_driver);
 436
 437MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
 438MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
 439MODULE_LICENSE("GPL");
 440