kernel/drivers/media/tuners/tua9001.c

   1 /*
   2  * Infineon TUA9001 silicon tuner driver
   3  *
   4  * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  */
  16
  17 #include "tua9001_priv.h"
  18
  19 static int tua9001_init(struct dvb_frontend *fe)
  20 {
  21         struct tua9001_dev *dev = fe->tuner_priv;
  22         struct i2c_client *client = dev->client;
  23         int ret, i;
  24         static const struct tua9001_reg_val data[] = {
  25                 {0x1e, 0x6512},
  26                 {0x25, 0xb888},
  27                 {0x39, 0x5460},
  28                 {0x3b, 0x00c0},
  29                 {0x3a, 0xf000},
  30                 {0x08, 0x0000},
  31                 {0x32, 0x0030},
  32                 {0x41, 0x703a},
  33                 {0x40, 0x1c78},
  34                 {0x2c, 0x1c00},
  35                 {0x36, 0xc013},
  36                 {0x37, 0x6f18},
  37                 {0x27, 0x0008},
  38                 {0x2a, 0x0001},
  39                 {0x34, 0x0a40},
  40         };
  41
  42         dev_dbg(&client->dev, "\n");
  43
  44         if (fe->callback) {
  45                 ret = fe->callback(client->adapter,
  46                                    DVB_FRONTEND_COMPONENT_TUNER,
  47                                    TUA9001_CMD_RESETN, 0);
  48                 if (ret)
  49                         goto err;
  50         }
  51
  52         for (i = 0; i < ARRAY_SIZE(data); i++) {
  53                 ret = regmap_write(dev->regmap, data[i].reg, data[i].val);
  54                 if (ret)
  55                         goto err;
  56         }
  57         return 0;
  58 err:
  59         dev_dbg(&client->dev, "failed=%d\n", ret);
  60         return ret;
  61 }
  62
  63 static int tua9001_sleep(struct dvb_frontend *fe)
  64 {
  65         struct tua9001_dev *dev = fe->tuner_priv;
  66         struct i2c_client *client = dev->client;
  67         int ret;
  68
  69         dev_dbg(&client->dev, "\n");
  70
  71         if (fe->callback) {
  72                 ret = fe->callback(client->adapter,
  73                                    DVB_FRONTEND_COMPONENT_TUNER,
  74                                    TUA9001_CMD_RESETN, 1);
  75                 if (ret)
  76                         goto err;
  77         }
  78         return 0;
  79 err:
  80         dev_dbg(&client->dev, "failed=%d\n", ret);
  81         return ret;
  82 }
  83
  84 static int tua9001_set_params(struct dvb_frontend *fe)
  85 {
  86         struct tua9001_dev *dev = fe->tuner_priv;
  87         struct i2c_client *client = dev->client;
  88         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  89         int ret, i;
  90         u16 val;
  91         struct tua9001_reg_val data[2];
  92
  93         dev_dbg(&client->dev,
  94                 "delivery_system=%u frequency=%u bandwidth_hz=%u\n",
  95                 c->delivery_system, c->frequency, c->bandwidth_hz);
  96
  97         switch (c->delivery_system) {
  98         case SYS_DVBT:
  99                 switch (c->bandwidth_hz) {
 100                 case 8000000:
 101                         val  = 0x0000;
 102                         break;
 103                 case 7000000:
 104                         val  = 0x1000;
 105                         break;
 106                 case 6000000:
 107                         val  = 0x2000;
 108                         break;
 109                 case 5000000:
 110                         val  = 0x3000;
 111                         break;
 112                 default:
 113                         ret = -EINVAL;
 114                         goto err;
 115                 }
 116                 break;
 117         default:
 118                 ret = -EINVAL;
 119                 goto err;
 120         }
 121
 122         data[0].reg = 0x04;
 123         data[0].val = val;
 124         data[1].reg = 0x1f;
 125         data[1].val = div_u64((u64) (c->frequency - 150000000) * 48, 1000000);
 126
 127         if (fe->callback) {
 128                 ret = fe->callback(client->adapter,
 129                                    DVB_FRONTEND_COMPONENT_TUNER,
 130                                    TUA9001_CMD_RXEN, 0);
 131                 if (ret)
 132                         goto err;
 133         }
 134
 135         for (i = 0; i < ARRAY_SIZE(data); i++) {
 136                 ret = regmap_write(dev->regmap, data[i].reg, data[i].val);
 137                 if (ret)
 138                         goto err;
 139         }
 140
 141         if (fe->callback) {
 142                 ret = fe->callback(client->adapter,
 143                                    DVB_FRONTEND_COMPONENT_TUNER,
 144                                    TUA9001_CMD_RXEN, 1);
 145                 if (ret)
 146                         goto err;
 147         }
 148         return 0;
 149 err:
 150         dev_dbg(&client->dev, "failed=%d\n", ret);
 151         return ret;
 152 }
 153
 154 static int tua9001_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 155 {
 156         struct tua9001_dev *dev = fe->tuner_priv;
 157         struct i2c_client *client = dev->client;
 158
 159         dev_dbg(&client->dev, "\n");
 160
 161         *frequency = 0; /* Zero-IF */
 162         return 0;
 163 }
 164
 165 static const struct dvb_tuner_ops tua9001_tuner_ops = {
 166         .info = {
 167                 .name           = "Infineon TUA9001",
 168                 .frequency_min  = 170000000,
 169                 .frequency_max  = 862000000,
 170         },
 171
 172         .init = tua9001_init,
 173         .sleep = tua9001_sleep,
 174         .set_params = tua9001_set_params,
 175
 176         .get_if_frequency = tua9001_get_if_frequency,
 177 };
 178
 179 static int tua9001_probe(struct i2c_client *client,
 180                         const struct i2c_device_id *id)
 181 {
 182         struct tua9001_dev *dev;
 183         struct tua9001_platform_data *pdata = client->dev.platform_data;
 184         struct dvb_frontend *fe = pdata->dvb_frontend;
 185         int ret;
 186         static const struct regmap_config regmap_config = {
 187                 .reg_bits =  8,
 188                 .val_bits = 16,
 189         };
 190
 191         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 192         if (!dev) {
 193                 ret = -ENOMEM;
 194                 goto err;
 195         }
 196
 197         dev->fe = pdata->dvb_frontend;
 198         dev->client = client;
 199         dev->regmap = devm_regmap_init_i2c(client, &regmap_config);
 200         if (IS_ERR(dev->regmap)) {
 201                 ret = PTR_ERR(dev->regmap);
 202                 goto err_kfree;
 203         }
 204
 205         if (fe->callback) {
 206                 ret = fe->callback(client->adapter,
 207                                    DVB_FRONTEND_COMPONENT_TUNER,
 208                                    TUA9001_CMD_CEN, 1);
 209                 if (ret)
 210                         goto err_kfree;
 211
 212                 ret = fe->callback(client->adapter,
 213                                    DVB_FRONTEND_COMPONENT_TUNER,
 214                                    TUA9001_CMD_RXEN, 0);
 215                 if (ret)
 216                         goto err_kfree;
 217
 218                 ret = fe->callback(client->adapter,
 219                                    DVB_FRONTEND_COMPONENT_TUNER,
 220                                    TUA9001_CMD_RESETN, 1);
 221                 if (ret)
 222                         goto err_kfree;
 223         }
 224
 225         fe->tuner_priv = dev;
 226         memcpy(&fe->ops.tuner_ops, &tua9001_tuner_ops,
 227                         sizeof(struct dvb_tuner_ops));
 228         i2c_set_clientdata(client, dev);
 229
 230         dev_info(&client->dev, "Infineon TUA9001 successfully attached\n");
 231         return 0;
 232 err_kfree:
 233         kfree(dev);
 234 err:
 235         dev_dbg(&client->dev, "failed=%d\n", ret);
 236         return ret;
 237 }
 238
 239 static int tua9001_remove(struct i2c_client *client)
 240 {
 241         struct tua9001_dev *dev = i2c_get_clientdata(client);
 242         struct dvb_frontend *fe = dev->fe;
 243         int ret;
 244
 245         dev_dbg(&client->dev, "\n");
 246
 247         if (fe->callback) {
 248                 ret = fe->callback(client->adapter,
 249                                    DVB_FRONTEND_COMPONENT_TUNER,
 250                                    TUA9001_CMD_CEN, 0);
 251                 if (ret)
 252                         goto err_kfree;
 253         }
 254         kfree(dev);
 255         return 0;
 256 err_kfree:
 257         kfree(dev);
 258         dev_dbg(&client->dev, "failed=%d\n", ret);
 259         return ret;
 260 }
 261
 262 static const struct i2c_device_id tua9001_id_table[] = {
 263         {"tua9001", 0},
 264         {}
 265 };
 266 MODULE_DEVICE_TABLE(i2c, tua9001_id_table);
 267
 268 static struct i2c_driver tua9001_driver = {
 269         .driver = {
 270                 .name   = "tua9001",
 271                 .suppress_bind_attrs = true,
 272         },
 273         .probe          = tua9001_probe,
 274         .remove         = tua9001_remove,
 275         .id_table       = tua9001_id_table,
 276 };
 277
 278 module_i2c_driver(tua9001_driver);
 279
 280 MODULE_DESCRIPTION("Infineon TUA9001 silicon tuner driver");
 281 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 282 MODULE_LICENSE("GPL");