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0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Silicon Labs Si2168 DVB-T/T2/C demodulator driver
0004  *
0005  * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
0006  */
0007 
0008 #include <linux/delay.h>
0009 
0010 #include "si2168_priv.h"
0011 
0012 static const struct dvb_frontend_ops si2168_ops;
0013 
0014 static void cmd_init(struct si2168_cmd *cmd, const u8 *buf, int wlen, int rlen)
0015 {
0016     memcpy(cmd->args, buf, wlen);
0017     cmd->wlen = wlen;
0018     cmd->rlen = rlen;
0019 }
0020 
0021 /* execute firmware command */
0022 static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
0023 {
0024     struct si2168_dev *dev = i2c_get_clientdata(client);
0025     int ret;
0026     unsigned long timeout;
0027 
0028     mutex_lock(&dev->i2c_mutex);
0029 
0030     if (cmd->wlen) {
0031         /* write cmd and args for firmware */
0032         ret = i2c_master_send(client, cmd->args, cmd->wlen);
0033         if (ret < 0) {
0034             goto err_mutex_unlock;
0035         } else if (ret != cmd->wlen) {
0036             ret = -EREMOTEIO;
0037             goto err_mutex_unlock;
0038         }
0039     }
0040 
0041     if (cmd->rlen) {
0042         /* wait cmd execution terminate */
0043         #define TIMEOUT 70
0044         timeout = jiffies + msecs_to_jiffies(TIMEOUT);
0045         while (!time_after(jiffies, timeout)) {
0046             ret = i2c_master_recv(client, cmd->args, cmd->rlen);
0047             if (ret < 0) {
0048                 goto err_mutex_unlock;
0049             } else if (ret != cmd->rlen) {
0050                 ret = -EREMOTEIO;
0051                 goto err_mutex_unlock;
0052             }
0053 
0054             /* firmware ready? */
0055             if ((cmd->args[0] >> 7) & 0x01)
0056                 break;
0057         }
0058 
0059         dev_dbg(&client->dev, "cmd execution took %d ms\n",
0060                 jiffies_to_msecs(jiffies) -
0061                 (jiffies_to_msecs(timeout) - TIMEOUT));
0062 
0063         /* error bit set? */
0064         if ((cmd->args[0] >> 6) & 0x01) {
0065             ret = -EREMOTEIO;
0066             goto err_mutex_unlock;
0067         }
0068 
0069         if (!((cmd->args[0] >> 7) & 0x01)) {
0070             ret = -ETIMEDOUT;
0071             goto err_mutex_unlock;
0072         }
0073     }
0074 
0075     mutex_unlock(&dev->i2c_mutex);
0076     return 0;
0077 err_mutex_unlock:
0078     mutex_unlock(&dev->i2c_mutex);
0079     dev_dbg(&client->dev, "failed=%d\n", ret);
0080     return ret;
0081 }
0082 
0083 static int si2168_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
0084 {
0085     struct i2c_client *client = fe->demodulator_priv;
0086     struct si2168_dev *dev = i2c_get_clientdata(client);
0087     struct si2168_cmd cmd;
0088     int ret = 0;
0089 
0090     dev_dbg(&client->dev, "%s acquire: %d\n", __func__, acquire);
0091 
0092     /* set manual value */
0093     if (dev->ts_mode & SI2168_TS_CLK_MANUAL) {
0094         cmd_init(&cmd, "\x14\x00\x0d\x10\xe8\x03", 6, 4);
0095         ret = si2168_cmd_execute(client, &cmd);
0096         if (ret)
0097             return ret;
0098     }
0099     /* set TS_MODE property */
0100     cmd_init(&cmd, "\x14\x00\x01\x10\x10\x00", 6, 4);
0101     if (dev->ts_mode & SI2168_TS_CLK_MANUAL)
0102         cmd.args[4] = SI2168_TS_CLK_MANUAL;
0103     if (acquire)
0104         cmd.args[4] |= dev->ts_mode;
0105     else
0106         cmd.args[4] |= SI2168_TS_TRISTATE;
0107     if (dev->ts_clock_gapped)
0108         cmd.args[4] |= 0x40;
0109     ret = si2168_cmd_execute(client, &cmd);
0110 
0111     return ret;
0112 }
0113 
0114 static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
0115 {
0116     struct i2c_client *client = fe->demodulator_priv;
0117     struct si2168_dev *dev = i2c_get_clientdata(client);
0118     struct dtv_frontend_properties *c = &fe->dtv_property_cache;
0119     int ret, i;
0120     unsigned int utmp, utmp1, utmp2;
0121     struct si2168_cmd cmd;
0122 
0123     *status = 0;
0124 
0125     if (!dev->active) {
0126         ret = -EAGAIN;
0127         goto err;
0128     }
0129 
0130     switch (c->delivery_system) {
0131     case SYS_DVBT:
0132         cmd_init(&cmd, "\xa0\x01", 2, 13);
0133         break;
0134     case SYS_DVBC_ANNEX_A:
0135         cmd_init(&cmd, "\x90\x01", 2, 9);
0136         break;
0137     case SYS_DVBT2:
0138         cmd_init(&cmd, "\x50\x01", 2, 14);
0139         break;
0140     default:
0141         ret = -EINVAL;
0142         goto err;
0143     }
0144 
0145     ret = si2168_cmd_execute(client, &cmd);
0146     if (ret)
0147         goto err;
0148 
0149     switch ((cmd.args[2] >> 1) & 0x03) {
0150     case 0x01:
0151         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
0152         break;
0153     case 0x03:
0154         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
0155                 FE_HAS_SYNC | FE_HAS_LOCK;
0156         break;
0157     }
0158 
0159     dev->fe_status = *status;
0160 
0161     if (*status & FE_HAS_LOCK) {
0162         c->cnr.len = 1;
0163         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
0164         c->cnr.stat[0].svalue = cmd.args[3] * 1000 / 4;
0165     } else {
0166         c->cnr.len = 1;
0167         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0168     }
0169 
0170     dev_dbg(&client->dev, "status=%02x args=%*ph\n",
0171             *status, cmd.rlen, cmd.args);
0172 
0173     /* BER */
0174     if (*status & FE_HAS_VITERBI) {
0175         cmd_init(&cmd, "\x82\x00", 2, 3);
0176         ret = si2168_cmd_execute(client, &cmd);
0177         if (ret)
0178             goto err;
0179 
0180         /*
0181          * Firmware returns [0, 255] mantissa and [0, 8] exponent.
0182          * Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8
0183          */
0184         utmp = clamp(8 - cmd.args[1], 0, 8);
0185         for (i = 0, utmp1 = 1; i < utmp; i++)
0186             utmp1 = utmp1 * 10;
0187 
0188         utmp1 = cmd.args[2] * utmp1;
0189         utmp2 = 100000000; /* 10^8 */
0190 
0191         dev_dbg(&client->dev,
0192             "post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n",
0193             utmp1, utmp2, cmd.args[2], cmd.args[1]);
0194 
0195         c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
0196         c->post_bit_error.stat[0].uvalue += utmp1;
0197         c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
0198         c->post_bit_count.stat[0].uvalue += utmp2;
0199     } else {
0200         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0201         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0202     }
0203 
0204     /* UCB */
0205     if (*status & FE_HAS_SYNC) {
0206         cmd_init(&cmd, "\x84\x01", 2, 3);
0207         ret = si2168_cmd_execute(client, &cmd);
0208         if (ret)
0209             goto err;
0210 
0211         utmp1 = cmd.args[2] << 8 | cmd.args[1] << 0;
0212         dev_dbg(&client->dev, "block_error=%u\n", utmp1);
0213 
0214         /* Sometimes firmware returns bogus value */
0215         if (utmp1 == 0xffff)
0216             utmp1 = 0;
0217 
0218         c->block_error.stat[0].scale = FE_SCALE_COUNTER;
0219         c->block_error.stat[0].uvalue += utmp1;
0220     } else {
0221         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0222     }
0223 
0224     return 0;
0225 err:
0226     dev_dbg(&client->dev, "failed=%d\n", ret);
0227     return ret;
0228 }
0229 
0230 static int si2168_set_frontend(struct dvb_frontend *fe)
0231 {
0232     struct i2c_client *client = fe->demodulator_priv;
0233     struct si2168_dev *dev = i2c_get_clientdata(client);
0234     struct dtv_frontend_properties *c = &fe->dtv_property_cache;
0235     int ret;
0236     struct si2168_cmd cmd;
0237     u8 bandwidth, delivery_system;
0238 
0239     dev_dbg(&client->dev,
0240             "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u stream_id=%u\n",
0241             c->delivery_system, c->modulation, c->frequency,
0242             c->bandwidth_hz, c->symbol_rate, c->inversion,
0243             c->stream_id);
0244 
0245     if (!dev->active) {
0246         ret = -EAGAIN;
0247         goto err;
0248     }
0249 
0250     switch (c->delivery_system) {
0251     case SYS_DVBT:
0252         delivery_system = 0x20;
0253         break;
0254     case SYS_DVBC_ANNEX_A:
0255         delivery_system = 0x30;
0256         break;
0257     case SYS_DVBT2:
0258         delivery_system = 0x70;
0259         break;
0260     default:
0261         ret = -EINVAL;
0262         goto err;
0263     }
0264 
0265     if (c->bandwidth_hz == 0) {
0266         ret = -EINVAL;
0267         goto err;
0268     } else if (c->bandwidth_hz <= 2000000)
0269         bandwidth = 0x02;
0270     else if (c->bandwidth_hz <= 5000000)
0271         bandwidth = 0x05;
0272     else if (c->bandwidth_hz <= 6000000)
0273         bandwidth = 0x06;
0274     else if (c->bandwidth_hz <= 7000000)
0275         bandwidth = 0x07;
0276     else if (c->bandwidth_hz <= 8000000)
0277         bandwidth = 0x08;
0278     else if (c->bandwidth_hz <= 9000000)
0279         bandwidth = 0x09;
0280     else if (c->bandwidth_hz <= 10000000)
0281         bandwidth = 0x0a;
0282     else
0283         bandwidth = 0x0f;
0284 
0285     /* program tuner */
0286     if (fe->ops.tuner_ops.set_params) {
0287         ret = fe->ops.tuner_ops.set_params(fe);
0288         if (ret)
0289             goto err;
0290     }
0291 
0292     cmd_init(&cmd, "\x88\x02\x02\x02\x02", 5, 5);
0293     ret = si2168_cmd_execute(client, &cmd);
0294     if (ret)
0295         goto err;
0296 
0297     /* that has no big effect */
0298     if (c->delivery_system == SYS_DVBT)
0299         cmd_init(&cmd, "\x89\x21\x06\x11\xff\x98", 6, 3);
0300     else if (c->delivery_system == SYS_DVBC_ANNEX_A)
0301         cmd_init(&cmd, "\x89\x21\x06\x11\x89\xf0", 6, 3);
0302     else if (c->delivery_system == SYS_DVBT2)
0303         cmd_init(&cmd, "\x89\x21\x06\x11\x89\x20", 6, 3);
0304     ret = si2168_cmd_execute(client, &cmd);
0305     if (ret)
0306         goto err;
0307 
0308     if (c->delivery_system == SYS_DVBT2) {
0309         /* select PLP */
0310         cmd.args[0] = 0x52;
0311         cmd.args[1] = c->stream_id & 0xff;
0312         cmd.args[2] = c->stream_id == NO_STREAM_ID_FILTER ? 0 : 1;
0313         cmd.wlen = 3;
0314         cmd.rlen = 1;
0315         ret = si2168_cmd_execute(client, &cmd);
0316         if (ret)
0317             goto err;
0318     }
0319 
0320     cmd_init(&cmd, "\x51\x03", 2, 12);
0321     ret = si2168_cmd_execute(client, &cmd);
0322     if (ret)
0323         goto err;
0324 
0325     cmd_init(&cmd, "\x12\x08\x04", 3, 3);
0326     ret = si2168_cmd_execute(client, &cmd);
0327     if (ret)
0328         goto err;
0329 
0330     cmd_init(&cmd, "\x14\x00\x0c\x10\x12\x00", 6, 4);
0331     ret = si2168_cmd_execute(client, &cmd);
0332     if (ret)
0333         goto err;
0334 
0335     cmd_init(&cmd, "\x14\x00\x06\x10\x24\x00", 6, 4);
0336     ret = si2168_cmd_execute(client, &cmd);
0337     if (ret)
0338         goto err;
0339 
0340     cmd_init(&cmd, "\x14\x00\x07\x10\x00\x24", 6, 4);
0341     ret = si2168_cmd_execute(client, &cmd);
0342     if (ret)
0343         goto err;
0344 
0345     cmd_init(&cmd, "\x14\x00\x0a\x10\x00\x00", 6, 4);
0346     cmd.args[4] = delivery_system | bandwidth;
0347     if (dev->spectral_inversion)
0348         cmd.args[5] |= 1;
0349     ret = si2168_cmd_execute(client, &cmd);
0350     if (ret)
0351         goto err;
0352 
0353     /* set DVB-C symbol rate */
0354     if (c->delivery_system == SYS_DVBC_ANNEX_A) {
0355         cmd_init(&cmd, "\x14\x00\x02\x11\x00\x00", 6, 4);
0356         cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff;
0357         cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff;
0358         ret = si2168_cmd_execute(client, &cmd);
0359         if (ret)
0360             goto err;
0361     }
0362 
0363     cmd_init(&cmd, "\x14\x00\x0f\x10\x10\x00", 6, 4);
0364     ret = si2168_cmd_execute(client, &cmd);
0365     if (ret)
0366         goto err;
0367 
0368     cmd_init(&cmd, "\x14\x00\x09\x10\xe3\x08", 6, 4);
0369     cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
0370     ret = si2168_cmd_execute(client, &cmd);
0371     if (ret)
0372         goto err;
0373 
0374     cmd_init(&cmd, "\x14\x00\x08\x10\xd7\x05", 6, 4);
0375     cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10;
0376     ret = si2168_cmd_execute(client, &cmd);
0377     if (ret)
0378         goto err;
0379 
0380     cmd_init(&cmd, "\x14\x00\x01\x12\x00\x00", 6, 4);
0381     ret = si2168_cmd_execute(client, &cmd);
0382     if (ret)
0383         goto err;
0384 
0385     cmd_init(&cmd, "\x14\x00\x01\x03\x0c\x00", 6, 4);
0386     ret = si2168_cmd_execute(client, &cmd);
0387     if (ret)
0388         goto err;
0389 
0390     cmd_init(&cmd, "\x85", 1, 1);
0391     ret = si2168_cmd_execute(client, &cmd);
0392     if (ret)
0393         goto err;
0394 
0395     dev->delivery_system = c->delivery_system;
0396 
0397     /* enable ts bus */
0398     ret = si2168_ts_bus_ctrl(fe, 1);
0399     if (ret)
0400         goto err;
0401 
0402     return 0;
0403 err:
0404     dev_dbg(&client->dev, "failed=%d\n", ret);
0405     return ret;
0406 }
0407 
0408 static int si2168_init(struct dvb_frontend *fe)
0409 {
0410     struct i2c_client *client = fe->demodulator_priv;
0411     struct si2168_dev *dev = i2c_get_clientdata(client);
0412     struct dtv_frontend_properties *c = &fe->dtv_property_cache;
0413     int ret, len, remaining;
0414     const struct firmware *fw;
0415     struct si2168_cmd cmd;
0416 
0417     dev_dbg(&client->dev, "\n");
0418 
0419     /* initialize */
0420     cmd_init(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00",
0421          13, 0);
0422     ret = si2168_cmd_execute(client, &cmd);
0423     if (ret)
0424         goto err;
0425 
0426     if (dev->warm) {
0427         /* resume */
0428         cmd_init(&cmd, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8, 1);
0429         ret = si2168_cmd_execute(client, &cmd);
0430         if (ret)
0431             goto err;
0432 
0433         udelay(100);
0434         cmd_init(&cmd, "\x85", 1, 1);
0435         ret = si2168_cmd_execute(client, &cmd);
0436         if (ret)
0437             goto err;
0438 
0439         goto warm;
0440     }
0441 
0442     /* power up */
0443     cmd_init(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8, 1);
0444     ret = si2168_cmd_execute(client, &cmd);
0445     if (ret)
0446         goto err;
0447 
0448     /* request the firmware, this will block and timeout */
0449     ret = request_firmware(&fw, dev->firmware_name, &client->dev);
0450     if (ret) {
0451         dev_err(&client->dev,
0452             "firmware file '%s' not found\n",
0453             dev->firmware_name);
0454         goto err_release_firmware;
0455     }
0456 
0457     dev_info(&client->dev, "downloading firmware from file '%s'\n",
0458             dev->firmware_name);
0459 
0460     if ((fw->size % 17 == 0) && (fw->data[0] > 5)) {
0461         /* firmware is in the new format */
0462         for (remaining = fw->size; remaining > 0; remaining -= 17) {
0463             len = fw->data[fw->size - remaining];
0464             if (len > SI2168_ARGLEN) {
0465                 ret = -EINVAL;
0466                 break;
0467             }
0468             cmd_init(&cmd, &fw->data[(fw->size - remaining) + 1],
0469                  len, 1);
0470             ret = si2168_cmd_execute(client, &cmd);
0471             if (ret)
0472                 break;
0473         }
0474     } else if (fw->size % 8 == 0) {
0475         /* firmware is in the old format */
0476         for (remaining = fw->size; remaining > 0; remaining -= 8) {
0477             cmd_init(&cmd, &fw->data[fw->size - remaining], 8, 1);
0478             ret = si2168_cmd_execute(client, &cmd);
0479             if (ret)
0480                 break;
0481         }
0482     } else {
0483         /* bad or unknown firmware format */
0484         ret = -EINVAL;
0485     }
0486 
0487     if (ret) {
0488         dev_err(&client->dev, "firmware download failed %d\n", ret);
0489         goto err_release_firmware;
0490     }
0491 
0492     release_firmware(fw);
0493 
0494     cmd_init(&cmd, "\x01\x01", 2, 1);
0495     ret = si2168_cmd_execute(client, &cmd);
0496     if (ret)
0497         goto err;
0498 
0499     /* query firmware version */
0500     cmd_init(&cmd, "\x11", 1, 10);
0501     ret = si2168_cmd_execute(client, &cmd);
0502     if (ret)
0503         goto err;
0504 
0505     dev->version = (cmd.args[9] + '@') << 24 | (cmd.args[6] - '0') << 16 |
0506                (cmd.args[7] - '0') << 8 | (cmd.args[8]) << 0;
0507     dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
0508          dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
0509          dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
0510 
0511     /* set ts mode */
0512     ret = si2168_ts_bus_ctrl(fe, 1);
0513     if (ret)
0514         goto err;
0515 
0516     dev->warm = true;
0517     dev->initialized = true;
0518 warm:
0519     /* Init stats here to indicate which stats are supported */
0520     c->cnr.len = 1;
0521     c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0522     c->post_bit_error.len = 1;
0523     c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0524     c->post_bit_count.len = 1;
0525     c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0526     c->block_error.len = 1;
0527     c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
0528 
0529     dev->active = true;
0530 
0531     return 0;
0532 err_release_firmware:
0533     release_firmware(fw);
0534 err:
0535     dev_dbg(&client->dev, "failed=%d\n", ret);
0536     return ret;
0537 }
0538 
0539 static int si2168_resume(struct dvb_frontend *fe)
0540 {
0541     struct i2c_client *client = fe->demodulator_priv;
0542     struct si2168_dev *dev = i2c_get_clientdata(client);
0543 
0544     /*
0545      * check whether si2168_init() has been called successfully
0546      * outside of a resume cycle. Only call it (and load firmware)
0547      * in this case. si2168_init() is only called during resume
0548      * once the device has actually been used. Otherwise, leave the
0549      * device untouched.
0550      */
0551     if (dev->initialized) {
0552         dev_dbg(&client->dev, "previously initialized, call si2168_init()\n");
0553         return si2168_init(fe);
0554     }
0555     dev_dbg(&client->dev, "not initialized yet, skipping init on resume\n");
0556     return 0;
0557 }
0558 
0559 static int si2168_sleep(struct dvb_frontend *fe)
0560 {
0561     struct i2c_client *client = fe->demodulator_priv;
0562     struct si2168_dev *dev = i2c_get_clientdata(client);
0563     int ret;
0564     struct si2168_cmd cmd;
0565 
0566     dev_dbg(&client->dev, "\n");
0567 
0568     dev->active = false;
0569 
0570     /* tri-state data bus */
0571     ret = si2168_ts_bus_ctrl(fe, 0);
0572     if (ret)
0573         goto err;
0574 
0575     /* Firmware later than B 4.0-11 loses warm state during sleep */
0576     if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
0577         dev->warm = false;
0578 
0579     cmd_init(&cmd, "\x13", 1, 0);
0580     ret = si2168_cmd_execute(client, &cmd);
0581     if (ret)
0582         goto err;
0583 
0584     return 0;
0585 err:
0586     dev_dbg(&client->dev, "failed=%d\n", ret);
0587     return ret;
0588 }
0589 
0590 static int si2168_get_tune_settings(struct dvb_frontend *fe,
0591     struct dvb_frontend_tune_settings *s)
0592 {
0593     s->min_delay_ms = 900;
0594 
0595     return 0;
0596 }
0597 
0598 static int si2168_select(struct i2c_mux_core *muxc, u32 chan)
0599 {
0600     struct i2c_client *client = i2c_mux_priv(muxc);
0601     int ret;
0602     struct si2168_cmd cmd;
0603 
0604     /* open I2C gate */
0605     cmd_init(&cmd, "\xc0\x0d\x01", 3, 0);
0606     ret = si2168_cmd_execute(client, &cmd);
0607     if (ret)
0608         goto err;
0609 
0610     return 0;
0611 err:
0612     dev_dbg(&client->dev, "failed=%d\n", ret);
0613     return ret;
0614 }
0615 
0616 static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan)
0617 {
0618     struct i2c_client *client = i2c_mux_priv(muxc);
0619     int ret;
0620     struct si2168_cmd cmd;
0621 
0622     /* close I2C gate */
0623     cmd_init(&cmd, "\xc0\x0d\x00", 3, 0);
0624     ret = si2168_cmd_execute(client, &cmd);
0625     if (ret)
0626         goto err;
0627 
0628     return 0;
0629 err:
0630     dev_dbg(&client->dev, "failed=%d\n", ret);
0631     return ret;
0632 }
0633 
0634 static const struct dvb_frontend_ops si2168_ops = {
0635     .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
0636     .info = {
0637         .name = "Silicon Labs Si2168",
0638         .frequency_min_hz      =  48 * MHz,
0639         .frequency_max_hz      = 870 * MHz,
0640         .frequency_stepsize_hz = 62500,
0641         .symbol_rate_min       = 1000000,
0642         .symbol_rate_max       = 7200000,
0643         .caps = FE_CAN_FEC_1_2 |
0644             FE_CAN_FEC_2_3 |
0645             FE_CAN_FEC_3_4 |
0646             FE_CAN_FEC_5_6 |
0647             FE_CAN_FEC_7_8 |
0648             FE_CAN_FEC_AUTO |
0649             FE_CAN_QPSK |
0650             FE_CAN_QAM_16 |
0651             FE_CAN_QAM_32 |
0652             FE_CAN_QAM_64 |
0653             FE_CAN_QAM_128 |
0654             FE_CAN_QAM_256 |
0655             FE_CAN_QAM_AUTO |
0656             FE_CAN_TRANSMISSION_MODE_AUTO |
0657             FE_CAN_GUARD_INTERVAL_AUTO |
0658             FE_CAN_HIERARCHY_AUTO |
0659             FE_CAN_MUTE_TS |
0660             FE_CAN_2G_MODULATION |
0661             FE_CAN_MULTISTREAM
0662     },
0663 
0664     .get_tune_settings = si2168_get_tune_settings,
0665 
0666     .init = si2168_init,
0667     .sleep = si2168_sleep,
0668     .resume = si2168_resume,
0669 
0670     .set_frontend = si2168_set_frontend,
0671 
0672     .read_status = si2168_read_status,
0673 };
0674 
0675 static int si2168_probe(struct i2c_client *client,
0676         const struct i2c_device_id *id)
0677 {
0678     struct si2168_config *config = client->dev.platform_data;
0679     struct si2168_dev *dev;
0680     int ret;
0681     struct si2168_cmd cmd;
0682 
0683     dev_dbg(&client->dev, "\n");
0684 
0685     dev = kzalloc(sizeof(*dev), GFP_KERNEL);
0686     if (!dev) {
0687         ret = -ENOMEM;
0688         goto err;
0689     }
0690 
0691     i2c_set_clientdata(client, dev);
0692     mutex_init(&dev->i2c_mutex);
0693 
0694     /* Initialize */
0695     cmd_init(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00",
0696          13, 0);
0697     ret = si2168_cmd_execute(client, &cmd);
0698     if (ret)
0699         goto err_kfree;
0700 
0701     /* Power up */
0702     cmd_init(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8, 1);
0703     ret = si2168_cmd_execute(client, &cmd);
0704     if (ret)
0705         goto err_kfree;
0706 
0707     /* Query chip revision */
0708     cmd_init(&cmd, "\x02", 1, 13);
0709     ret = si2168_cmd_execute(client, &cmd);
0710     if (ret)
0711         goto err_kfree;
0712 
0713     dev->chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 |
0714                cmd.args[3] << 8 | cmd.args[4] << 0;
0715 
0716     switch (dev->chip_id) {
0717     case SI2168_CHIP_ID_A20:
0718         dev->firmware_name = SI2168_A20_FIRMWARE;
0719         break;
0720     case SI2168_CHIP_ID_A30:
0721         dev->firmware_name = SI2168_A30_FIRMWARE;
0722         break;
0723     case SI2168_CHIP_ID_B40:
0724         dev->firmware_name = SI2168_B40_FIRMWARE;
0725         break;
0726     case SI2168_CHIP_ID_D60:
0727         dev->firmware_name = SI2168_D60_FIRMWARE;
0728         break;
0729     default:
0730         dev_dbg(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
0731             cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
0732         ret = -ENODEV;
0733         goto err_kfree;
0734     }
0735 
0736     dev->version = (cmd.args[1]) << 24 | (cmd.args[3] - '0') << 16 |
0737                (cmd.args[4] - '0') << 8 | (cmd.args[5]) << 0;
0738 
0739     /* create mux i2c adapter for tuner */
0740     dev->muxc = i2c_mux_alloc(client->adapter, &client->dev,
0741                   1, 0, I2C_MUX_LOCKED,
0742                   si2168_select, si2168_deselect);
0743     if (!dev->muxc) {
0744         ret = -ENOMEM;
0745         goto err_kfree;
0746     }
0747     dev->muxc->priv = client;
0748     ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
0749     if (ret)
0750         goto err_kfree;
0751 
0752     /* create dvb_frontend */
0753     memcpy(&dev->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));
0754     dev->fe.demodulator_priv = client;
0755     *config->i2c_adapter = dev->muxc->adapter[0];
0756     *config->fe = &dev->fe;
0757     dev->ts_mode = config->ts_mode;
0758     dev->ts_clock_inv = config->ts_clock_inv;
0759     dev->ts_clock_gapped = config->ts_clock_gapped;
0760     dev->spectral_inversion = config->spectral_inversion;
0761 
0762     dev_info(&client->dev, "Silicon Labs Si2168-%c%d%d successfully identified\n",
0763          dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
0764          dev->version >> 8 & 0xff);
0765     dev_info(&client->dev, "firmware version: %c %d.%d.%d\n",
0766          dev->version >> 24 & 0xff, dev->version >> 16 & 0xff,
0767          dev->version >> 8 & 0xff, dev->version >> 0 & 0xff);
0768 
0769     return 0;
0770 err_kfree:
0771     kfree(dev);
0772 err:
0773     dev_warn(&client->dev, "probe failed = %d\n", ret);
0774     return ret;
0775 }
0776 
0777 static int si2168_remove(struct i2c_client *client)
0778 {
0779     struct si2168_dev *dev = i2c_get_clientdata(client);
0780 
0781     dev_dbg(&client->dev, "\n");
0782 
0783     i2c_mux_del_adapters(dev->muxc);
0784 
0785     dev->fe.ops.release = NULL;
0786     dev->fe.demodulator_priv = NULL;
0787 
0788     kfree(dev);
0789 
0790     return 0;
0791 }
0792 
0793 static const struct i2c_device_id si2168_id_table[] = {
0794     {"si2168", 0},
0795     {}
0796 };
0797 MODULE_DEVICE_TABLE(i2c, si2168_id_table);
0798 
0799 static struct i2c_driver si2168_driver = {
0800     .driver = {
0801         .name                = "si2168",
0802         .suppress_bind_attrs = true,
0803     },
0804     .probe      = si2168_probe,
0805     .remove     = si2168_remove,
0806     .id_table   = si2168_id_table,
0807 };
0808 
0809 module_i2c_driver(si2168_driver);
0810 
0811 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
0812 MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");
0813 MODULE_LICENSE("GPL");
0814 MODULE_FIRMWARE(SI2168_A20_FIRMWARE);
0815 MODULE_FIRMWARE(SI2168_A30_FIRMWARE);
0816 MODULE_FIRMWARE(SI2168_B40_FIRMWARE);
0817 MODULE_FIRMWARE(SI2168_D60_FIRMWARE);
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