/* * NXP TDA18212HN silicon tuner driver * * Copyright (C) 2011 Antti Palosaari * * 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" /* Max transfer size done by I2C transfer functions */ #define MAX_XFER_SIZE 64 struct tda18212_priv { struct tda18212_config cfg; struct i2c_client *client; 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[MAX_XFER_SIZE]; struct i2c_msg msg[1] = { { .addr = priv->client->addr, .flags = 0, .len = 1 + len, .buf = buf, } }; if (1 + len > sizeof(buf)) { dev_warn(&priv->client->dev, "i2c wr reg=%04x: len=%d is too big!\n", reg, len); return -EINVAL; } buf[0] = reg; memcpy(&buf[1], val, len); ret = i2c_transfer(priv->client->adapter, msg, 1); if (ret == 1) { ret = 0; } else { dev_warn(&priv->client->dev, "i2c wr failed=%d reg=%02x len=%d\n", 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[MAX_XFER_SIZE]; struct i2c_msg msg[2] = { { .addr = priv->client->addr, .flags = 0, .len = 1, .buf = ®, }, { .addr = priv->client->addr, .flags = I2C_M_RD, .len = len, .buf = buf, } }; if (len > sizeof(buf)) { dev_warn(&priv->client->dev, "i2c rd reg=%04x: len=%d is too big!\n", reg, len); return -EINVAL; } ret = i2c_transfer(priv->client->adapter, msg, 2); if (ret == 2) { memcpy(val, buf, len); ret = 0; } else { dev_warn(&priv->client->dev, "i2c rd failed=%d reg=%02x len=%d\n", 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 #define ATSC_VSB 8 #define ATSC_QAM 9 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 }, [ATSC_VSB] = { 0x7d, 0x20, 0x63 }, [ATSC_QAM] = { 0x7d, 0x20, 0x63 }, }; dev_dbg(&priv->client->dev, "delivery_system=%d frequency=%d bandwidth_hz=%d\n", 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_ATSC: if_khz = priv->cfg.if_atsc_vsb; i = ATSC_VSB; break; case SYS_DVBC_ANNEX_B: if_khz = priv->cfg.if_atsc_qam; i = ATSC_QAM; break; 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->client->dev, "failed=%d\n", 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 const struct dvb_tuner_ops tda18212_tuner_ops = { .info = { .name = "NXP TDA18212", .frequency_min = 48000000, .frequency_max = 864000000, .frequency_step = 1000, }, .set_params = tda18212_set_params, .get_if_frequency = tda18212_get_if_frequency, }; static int tda18212_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tda18212_config *cfg = client->dev.platform_data; struct dvb_frontend *fe = cfg->fe; struct tda18212_priv *priv; int ret; u8 chip_id = chip_id; char *version; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; dev_err(&client->dev, "kzalloc() failed\n"); goto err; } memcpy(&priv->cfg, cfg, sizeof(struct tda18212_config)); priv->client = client; /* check if the tuner is there */ if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ ret = tda18212_rd_reg(priv, 0x00, &chip_id); dev_dbg(&priv->client->dev, "chip_id=%02x\n", chip_id); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ if (ret) goto err; switch (chip_id) { case 0xc7: version = "M"; /* master */ break; case 0x47: version = "S"; /* slave */ break; default: ret = -ENODEV; goto err; } dev_info(&priv->client->dev, "NXP TDA18212HN/%s successfully identified\n", version); fe->tuner_priv = priv; memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops, sizeof(struct dvb_tuner_ops)); i2c_set_clientdata(client, priv); return 0; err: dev_dbg(&client->dev, "failed=%d\n", ret); kfree(priv); return ret; } static int tda18212_remove(struct i2c_client *client) { struct tda18212_priv *priv = i2c_get_clientdata(client); struct dvb_frontend *fe = priv->cfg.fe; dev_dbg(&client->dev, "\n"); memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); fe->tuner_priv = NULL; kfree(priv); return 0; } static const struct i2c_device_id tda18212_id[] = { {"tda18212", 0}, {} }; MODULE_DEVICE_TABLE(i2c, tda18212_id); static struct i2c_driver tda18212_driver = { .driver = { .owner = THIS_MODULE, .name = "tda18212", }, .probe = tda18212_probe, .remove = tda18212_remove, .id_table = tda18212_id, }; module_i2c_driver(tda18212_driver); MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver"); MODULE_AUTHOR("Antti Palosaari "); MODULE_LICENSE("GPL");