diff options
Diffstat (limited to 'drivers/media/tuners/tda18212.c')
| -rw-r--r-- | drivers/media/tuners/tda18212.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/drivers/media/tuners/tda18212.c b/drivers/media/tuners/tda18212.c new file mode 100644 index 000000000000..5d9f02842501 --- /dev/null +++ b/drivers/media/tuners/tda18212.c @@ -0,0 +1,319 @@ +/* + * NXP TDA18212HN silicon tuner driver + * + * Copyright (C) 2011 Antti Palosaari <crope@iki.fi> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "tda18212.h" + +struct tda18212_priv { + struct tda18212_config *cfg; + struct i2c_adapter *i2c; + + u32 if_frequency; +}; + +/* write multiple registers */ +static int tda18212_wr_regs(struct tda18212_priv *priv, u8 reg, u8 *val, + int len) +{ + int ret; + u8 buf[len+1]; + struct i2c_msg msg[1] = { + { + .addr = priv->cfg->i2c_address, + .flags = 0, + .len = sizeof(buf), + .buf = buf, + } + }; + + buf[0] = reg; + memcpy(&buf[1], val, len); + + ret = i2c_transfer(priv->i2c, msg, 1); + if (ret == 1) { + ret = 0; + } else { + dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \ + "len=%d\n", KBUILD_MODNAME, ret, reg, len); + ret = -EREMOTEIO; + } + return ret; +} + +/* read multiple registers */ +static int tda18212_rd_regs(struct tda18212_priv *priv, u8 reg, u8 *val, + int len) +{ + int ret; + u8 buf[len]; + struct i2c_msg msg[2] = { + { + .addr = priv->cfg->i2c_address, + .flags = 0, + .len = 1, + .buf = ®, + }, { + .addr = priv->cfg->i2c_address, + .flags = I2C_M_RD, + .len = sizeof(buf), + .buf = buf, + } + }; + + ret = i2c_transfer(priv->i2c, msg, 2); + if (ret == 2) { + memcpy(val, buf, len); + ret = 0; + } else { + dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \ + "len=%d\n", KBUILD_MODNAME, ret, reg, len); + ret = -EREMOTEIO; + } + + return ret; +} + +/* write single register */ +static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val) +{ + return tda18212_wr_regs(priv, reg, &val, 1); +} + +/* read single register */ +static int tda18212_rd_reg(struct tda18212_priv *priv, u8 reg, u8 *val) +{ + return tda18212_rd_regs(priv, reg, val, 1); +} + +#if 0 /* keep, useful when developing driver */ +static void tda18212_dump_regs(struct tda18212_priv *priv) +{ + int i; + u8 buf[256]; + + #define TDA18212_RD_LEN 32 + for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN) + tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN); + + print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf, + sizeof(buf), true); + + return; +} +#endif + +static int tda18212_set_params(struct dvb_frontend *fe) +{ + struct tda18212_priv *priv = fe->tuner_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret, i; + u32 if_khz; + u8 buf[9]; + #define DVBT_6 0 + #define DVBT_7 1 + #define DVBT_8 2 + #define DVBT2_6 3 + #define DVBT2_7 4 + #define DVBT2_8 5 + #define DVBC_6 6 + #define DVBC_8 7 + static const u8 bw_params[][3] = { + /* reg: 0f 13 23 */ + [DVBT_6] = { 0xb3, 0x20, 0x03 }, + [DVBT_7] = { 0xb3, 0x31, 0x01 }, + [DVBT_8] = { 0xb3, 0x22, 0x01 }, + [DVBT2_6] = { 0xbc, 0x20, 0x03 }, + [DVBT2_7] = { 0xbc, 0x72, 0x03 }, + [DVBT2_8] = { 0xbc, 0x22, 0x01 }, + [DVBC_6] = { 0x92, 0x50, 0x03 }, + [DVBC_8] = { 0x92, 0x53, 0x03 }, + }; + + dev_dbg(&priv->i2c->dev, + "%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n", + __func__, c->delivery_system, c->frequency, + c->bandwidth_hz); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ + + switch (c->delivery_system) { + case SYS_DVBT: + switch (c->bandwidth_hz) { + case 6000000: + if_khz = priv->cfg->if_dvbt_6; + i = DVBT_6; + break; + case 7000000: + if_khz = priv->cfg->if_dvbt_7; + i = DVBT_7; + break; + case 8000000: + if_khz = priv->cfg->if_dvbt_8; + i = DVBT_8; + break; + default: + ret = -EINVAL; + goto error; + } + break; + case SYS_DVBT2: + switch (c->bandwidth_hz) { + case 6000000: + if_khz = priv->cfg->if_dvbt2_6; + i = DVBT2_6; + break; + case 7000000: + if_khz = priv->cfg->if_dvbt2_7; + i = DVBT2_7; + break; + case 8000000: + if_khz = priv->cfg->if_dvbt2_8; + i = DVBT2_8; + break; + default: + ret = -EINVAL; + goto error; + } + break; + case SYS_DVBC_ANNEX_A: + case SYS_DVBC_ANNEX_C: + if_khz = priv->cfg->if_dvbc; + i = DVBC_8; + break; + default: + ret = -EINVAL; + goto error; + } + + ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]); + if (ret) + goto error; + + ret = tda18212_wr_reg(priv, 0x06, 0x00); + if (ret) + goto error; + + ret = tda18212_wr_reg(priv, 0x0f, bw_params[i][0]); + if (ret) + goto error; + + buf[0] = 0x02; + buf[1] = bw_params[i][1]; + buf[2] = 0x03; /* default value */ + buf[3] = DIV_ROUND_CLOSEST(if_khz, 50); + buf[4] = ((c->frequency / 1000) >> 16) & 0xff; + buf[5] = ((c->frequency / 1000) >> 8) & 0xff; + buf[6] = ((c->frequency / 1000) >> 0) & 0xff; + buf[7] = 0xc1; + buf[8] = 0x01; + ret = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf)); + if (ret) + goto error; + + /* actual IF rounded as it is on register */ + priv->if_frequency = buf[3] * 50 * 1000; + +exit: + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ + + return ret; + +error: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); + goto exit; +} + +static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct tda18212_priv *priv = fe->tuner_priv; + + *frequency = priv->if_frequency; + + return 0; +} + +static int tda18212_release(struct dvb_frontend *fe) +{ + kfree(fe->tuner_priv); + fe->tuner_priv = NULL; + return 0; +} + +static const struct dvb_tuner_ops tda18212_tuner_ops = { + .info = { + .name = "NXP TDA18212", + + .frequency_min = 48000000, + .frequency_max = 864000000, + .frequency_step = 1000, + }, + + .release = tda18212_release, + + .set_params = tda18212_set_params, + .get_if_frequency = tda18212_get_if_frequency, +}; + +struct dvb_frontend *tda18212_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c, struct tda18212_config *cfg) +{ + struct tda18212_priv *priv = NULL; + int ret; + u8 uninitialized_var(val); + + priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL); + if (priv == NULL) + return NULL; + + priv->cfg = cfg; + priv->i2c = i2c; + fe->tuner_priv = priv; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ + + /* check if the tuner is there */ + ret = tda18212_rd_reg(priv, 0x00, &val); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ + + dev_dbg(&priv->i2c->dev, "%s: ret=%d chip id=%02x\n", __func__, ret, + val); + if (ret || val != 0xc7) { + kfree(priv); + return NULL; + } + + dev_info(&priv->i2c->dev, + "%s: NXP TDA18212HN successfully identified\n", + KBUILD_MODNAME); + + memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops, + sizeof(struct dvb_tuner_ops)); + + return fe; +} +EXPORT_SYMBOL(tda18212_attach); + +MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver"); +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_LICENSE("GPL"); |
