kernel/drivers/media/tuners/tua9001.c

   1 /*
   2  * Infineon TUA 9001 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  *    You should have received a copy of the GNU General Public License along
  17  *    with this program; if not, write to the Free Software Foundation, Inc.,
  18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include "tua9001.h"
  22 #include "tua9001_priv.h"
  23
  24 /* write register */
  25 static int tua9001_wr_reg(struct tua9001_priv *priv, u8 reg, u16 val)
  26 {
  27         int ret;
  28         u8 buf[3] = { reg, (val >> 8) & 0xff, (val >> 0) & 0xff };
  29         struct i2c_msg msg[1] = {
  30                 {
  31                         .addr = priv->cfg->i2c_addr,
  32                         .flags = 0,
  33                         .len = sizeof(buf),
  34                         .buf = buf,
  35                 }
  36         };
  37
  38         ret = i2c_transfer(priv->i2c, msg, 1);
  39         if (ret == 1) {
  40                 ret = 0;
  41         } else {
  42                 dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x\n",
  43                                 KBUILD_MODNAME, ret, reg);
  44                 ret = -EREMOTEIO;
  45         }
  46
  47         return ret;
  48 }
  49
  50 static int tua9001_release(struct dvb_frontend *fe)
  51 {
  52         struct tua9001_priv *priv = fe->tuner_priv;
  53         int ret = 0;
  54
  55         dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
  56
  57         if (fe->callback)
  58                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
  59                                 TUA9001_CMD_CEN, 0);
  60
  61         kfree(fe->tuner_priv);
  62         fe->tuner_priv = NULL;
  63
  64         return ret;
  65 }
  66
  67 static int tua9001_init(struct dvb_frontend *fe)
  68 {
  69         struct tua9001_priv *priv = fe->tuner_priv;
  70         int ret = 0;
  71         u8 i;
  72         struct reg_val data[] = {
  73                 { 0x1e, 0x6512 },
  74                 { 0x25, 0xb888 },
  75                 { 0x39, 0x5460 },
  76                 { 0x3b, 0x00c0 },
  77                 { 0x3a, 0xf000 },
  78                 { 0x08, 0x0000 },
  79                 { 0x32, 0x0030 },
  80                 { 0x41, 0x703a },
  81                 { 0x40, 0x1c78 },
  82                 { 0x2c, 0x1c00 },
  83                 { 0x36, 0xc013 },
  84                 { 0x37, 0x6f18 },
  85                 { 0x27, 0x0008 },
  86                 { 0x2a, 0x0001 },
  87                 { 0x34, 0x0a40 },
  88         };
  89
  90         dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
  91
  92         if (fe->callback) {
  93                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
  94                                 TUA9001_CMD_RESETN, 0);
  95                 if (ret < 0)
  96                         goto err;
  97         }
  98
  99         if (fe->ops.i2c_gate_ctrl)
 100                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c-gate */
 101
 102         for (i = 0; i < ARRAY_SIZE(data); i++) {
 103                 ret = tua9001_wr_reg(priv, data[i].reg, data[i].val);
 104                 if (ret < 0)
 105                         goto err_i2c_gate_ctrl;
 106         }
 107
 108 err_i2c_gate_ctrl:
 109         if (fe->ops.i2c_gate_ctrl)
 110                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c-gate */
 111 err:
 112         if (ret < 0)
 113                 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 114
 115         return ret;
 116 }
 117
 118 static int tua9001_sleep(struct dvb_frontend *fe)
 119 {
 120         struct tua9001_priv *priv = fe->tuner_priv;
 121         int ret = 0;
 122
 123         dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
 124
 125         if (fe->callback)
 126                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 127                                 TUA9001_CMD_RESETN, 1);
 128
 129         if (ret < 0)
 130                 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 131
 132         return ret;
 133 }
 134
 135 static int tua9001_set_params(struct dvb_frontend *fe)
 136 {
 137         struct tua9001_priv *priv = fe->tuner_priv;
 138         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 139         int ret = 0, i;
 140         u16 val;
 141         u32 frequency;
 142         struct reg_val data[2];
 143
 144         dev_dbg(&priv->i2c->dev, "%s: delivery_system=%d frequency=%d " \
 145                         "bandwidth_hz=%d\n", __func__,
 146                         c->delivery_system, c->frequency, c->bandwidth_hz);
 147
 148         switch (c->delivery_system) {
 149         case SYS_DVBT:
 150                 switch (c->bandwidth_hz) {
 151                 case 8000000:
 152                         val  = 0x0000;
 153                         break;
 154                 case 7000000:
 155                         val  = 0x1000;
 156                         break;
 157                 case 6000000:
 158                         val  = 0x2000;
 159                         break;
 160                 case 5000000:
 161                         val  = 0x3000;
 162                         break;
 163                 default:
 164                         ret = -EINVAL;
 165                         goto err;
 166                 }
 167                 break;
 168         default:
 169                 ret = -EINVAL;
 170                 goto err;
 171         }
 172
 173         data[0].reg = 0x04;
 174         data[0].val = val;
 175
 176         frequency = (c->frequency - 150000000);
 177         frequency /= 100;
 178         frequency *= 48;
 179         frequency /= 10000;
 180
 181         data[1].reg = 0x1f;
 182         data[1].val = frequency;
 183
 184         if (fe->ops.i2c_gate_ctrl)
 185                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c-gate */
 186
 187         if (fe->callback) {
 188                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 189                                 TUA9001_CMD_RXEN, 0);
 190                 if (ret < 0)
 191                         goto err_i2c_gate_ctrl;
 192         }
 193
 194         for (i = 0; i < ARRAY_SIZE(data); i++) {
 195                 ret = tua9001_wr_reg(priv, data[i].reg, data[i].val);
 196                 if (ret < 0)
 197                         goto err_i2c_gate_ctrl;
 198         }
 199
 200         if (fe->callback) {
 201                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 202                                 TUA9001_CMD_RXEN, 1);
 203                 if (ret < 0)
 204                         goto err_i2c_gate_ctrl;
 205         }
 206
 207 err_i2c_gate_ctrl:
 208         if (fe->ops.i2c_gate_ctrl)
 209                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c-gate */
 210 err:
 211         if (ret < 0)
 212                 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 213
 214         return ret;
 215 }
 216
 217 static int tua9001_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 218 {
 219         struct tua9001_priv *priv = fe->tuner_priv;
 220
 221         dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
 222
 223         *frequency = 0; /* Zero-IF */
 224
 225         return 0;
 226 }
 227
 228 static const struct dvb_tuner_ops tua9001_tuner_ops = {
 229         .info = {
 230                 .name           = "Infineon TUA 9001",
 231
 232                 .frequency_min  = 170000000,
 233                 .frequency_max  = 862000000,
 234                 .frequency_step = 0,
 235         },
 236
 237         .release = tua9001_release,
 238
 239         .init = tua9001_init,
 240         .sleep = tua9001_sleep,
 241         .set_params = tua9001_set_params,
 242
 243         .get_if_frequency = tua9001_get_if_frequency,
 244 };
 245
 246 struct dvb_frontend *tua9001_attach(struct dvb_frontend *fe,
 247                 struct i2c_adapter *i2c, struct tua9001_config *cfg)
 248 {
 249         struct tua9001_priv *priv = NULL;
 250         int ret;
 251
 252         priv = kzalloc(sizeof(struct tua9001_priv), GFP_KERNEL);
 253         if (priv == NULL)
 254                 return NULL;
 255
 256         priv->cfg = cfg;
 257         priv->i2c = i2c;
 258
 259         if (fe->callback) {
 260                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 261                                 TUA9001_CMD_CEN, 1);
 262                 if (ret < 0)
 263                         goto err;
 264
 265                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 266                                 TUA9001_CMD_RXEN, 0);
 267                 if (ret < 0)
 268                         goto err;
 269
 270                 ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 271                                 TUA9001_CMD_RESETN, 1);
 272                 if (ret < 0)
 273                         goto err;
 274         }
 275
 276         dev_info(&priv->i2c->dev,
 277                         "%s: Infineon TUA 9001 successfully attached\n",
 278                         KBUILD_MODNAME);
 279
 280         memcpy(&fe->ops.tuner_ops, &tua9001_tuner_ops,
 281                         sizeof(struct dvb_tuner_ops));
 282
 283         fe->tuner_priv = priv;
 284         return fe;
 285 err:
 286         dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
 287         kfree(priv);
 288         return NULL;
 289 }
 290 EXPORT_SYMBOL(tua9001_attach);
 291
 292 MODULE_DESCRIPTION("Infineon TUA 9001 silicon tuner driver");
 293 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 294 MODULE_LICENSE("GPL");