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

   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
  17static 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 = &reg,
  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
  53static 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
  92static 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
 146int 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
 153int 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
 160int 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
 167int 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
 174int 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
 206int 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
 216int 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
 233int 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
 263static 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
 340err:
 341        dev_dbg(&s->client->dev, "init failed=%d\n", ret);
 342        return ret;
 343}
 344
 345static 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
 366static int sp2_probe(struct i2c_client *client,
 367                const struct i2c_device_id *id)
 368{
 369        struct sp2_config *cfg = client->dev.platform_data;
 370        struct sp2 *s;
 371        int ret;
 372
 373        dev_dbg(&client->dev, "\n");
 374
 375        s = kzalloc(sizeof(*s), GFP_KERNEL);
 376        if (!s) {
 377                ret = -ENOMEM;
 378                goto err;
 379        }
 380
 381        s->client = client;
 382        s->dvb_adap = cfg->dvb_adap;
 383        s->priv = cfg->priv;
 384        s->ci_control = cfg->ci_control;
 385
 386        i2c_set_clientdata(client, s);
 387
 388        ret = sp2_init(s);
 389        if (ret)
 390                goto err;
 391
 392        dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");
 393        return 0;
 394err:
 395        dev_dbg(&client->dev, "init failed=%d\n", ret);
 396        kfree(s);
 397
 398        return ret;
 399}
 400
 401static int sp2_remove(struct i2c_client *client)
 402{
 403        struct sp2 *s = i2c_get_clientdata(client);
 404
 405        dev_dbg(&client->dev, "\n");
 406        sp2_exit(client);
 407        kfree(s);
 408        return 0;
 409}
 410
 411static const struct i2c_device_id sp2_id[] = {
 412        {"sp2", 0},
 413        {}
 414};
 415MODULE_DEVICE_TABLE(i2c, sp2_id);
 416
 417static struct i2c_driver sp2_driver = {
 418        .driver = {
 419                .name   = "sp2",
 420        },
 421        .probe          = sp2_probe,
 422        .remove         = sp2_remove,
 423        .id_table       = sp2_id,
 424};
 425
 426module_i2c_driver(sp2_driver);
 427
 428MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
 429MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
 430MODULE_LICENSE("GPL");
 431