2 * NXP TDA18212HN silicon tuner driver
4 * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
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.
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.
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.
23 /* Max transfer size done by I2C transfer functions */
24 #define MAX_XFER_SIZE 64
26 struct tda18212_priv {
27 struct tda18212_config *cfg;
28 struct i2c_adapter *i2c;
33 /* write multiple registers */
34 static int tda18212_wr_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
38 u8 buf[MAX_XFER_SIZE];
39 struct i2c_msg msg[1] = {
41 .addr = priv->cfg->i2c_address,
48 if (1 + len > sizeof(buf)) {
49 dev_warn(&priv->i2c->dev,
50 "%s: i2c wr reg=%04x: len=%d is too big!\n",
51 KBUILD_MODNAME, reg, len);
56 memcpy(&buf[1], val, len);
58 ret = i2c_transfer(priv->i2c, msg, 1);
62 dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
63 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
69 /* read multiple registers */
70 static int tda18212_rd_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
74 u8 buf[MAX_XFER_SIZE];
75 struct i2c_msg msg[2] = {
77 .addr = priv->cfg->i2c_address,
82 .addr = priv->cfg->i2c_address,
89 if (len > sizeof(buf)) {
90 dev_warn(&priv->i2c->dev,
91 "%s: i2c rd reg=%04x: len=%d is too big!\n",
92 KBUILD_MODNAME, reg, len);
96 ret = i2c_transfer(priv->i2c, msg, 2);
98 memcpy(val, buf, len);
101 dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
102 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
109 /* write single register */
110 static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
112 return tda18212_wr_regs(priv, reg, &val, 1);
115 /* read single register */
116 static int tda18212_rd_reg(struct tda18212_priv *priv, u8 reg, u8 *val)
118 return tda18212_rd_regs(priv, reg, val, 1);
121 #if 0 /* keep, useful when developing driver */
122 static void tda18212_dump_regs(struct tda18212_priv *priv)
127 #define TDA18212_RD_LEN 32
128 for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
129 tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);
131 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
138 static int tda18212_set_params(struct dvb_frontend *fe)
140 struct tda18212_priv *priv = fe->tuner_priv;
141 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
153 static const u8 bw_params[][3] = {
155 [DVBT_6] = { 0xb3, 0x20, 0x03 },
156 [DVBT_7] = { 0xb3, 0x31, 0x01 },
157 [DVBT_8] = { 0xb3, 0x22, 0x01 },
158 [DVBT2_6] = { 0xbc, 0x20, 0x03 },
159 [DVBT2_7] = { 0xbc, 0x72, 0x03 },
160 [DVBT2_8] = { 0xbc, 0x22, 0x01 },
161 [DVBC_6] = { 0x92, 0x50, 0x03 },
162 [DVBC_8] = { 0x92, 0x53, 0x03 },
165 dev_dbg(&priv->i2c->dev,
166 "%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
167 __func__, c->delivery_system, c->frequency,
170 if (fe->ops.i2c_gate_ctrl)
171 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
173 switch (c->delivery_system) {
175 switch (c->bandwidth_hz) {
177 if_khz = priv->cfg->if_dvbt_6;
181 if_khz = priv->cfg->if_dvbt_7;
185 if_khz = priv->cfg->if_dvbt_8;
194 switch (c->bandwidth_hz) {
196 if_khz = priv->cfg->if_dvbt2_6;
200 if_khz = priv->cfg->if_dvbt2_7;
204 if_khz = priv->cfg->if_dvbt2_8;
212 case SYS_DVBC_ANNEX_A:
213 case SYS_DVBC_ANNEX_C:
214 if_khz = priv->cfg->if_dvbc;
222 ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
226 ret = tda18212_wr_reg(priv, 0x06, 0x00);
230 ret = tda18212_wr_reg(priv, 0x0f, bw_params[i][0]);
235 buf[1] = bw_params[i][1];
236 buf[2] = 0x03; /* default value */
237 buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
238 buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
239 buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
240 buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
243 ret = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
247 /* actual IF rounded as it is on register */
248 priv->if_frequency = buf[3] * 50 * 1000;
251 if (fe->ops.i2c_gate_ctrl)
252 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
257 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
261 static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
263 struct tda18212_priv *priv = fe->tuner_priv;
265 *frequency = priv->if_frequency;
270 static int tda18212_release(struct dvb_frontend *fe)
272 kfree(fe->tuner_priv);
273 fe->tuner_priv = NULL;
277 static const struct dvb_tuner_ops tda18212_tuner_ops = {
279 .name = "NXP TDA18212",
281 .frequency_min = 48000000,
282 .frequency_max = 864000000,
283 .frequency_step = 1000,
286 .release = tda18212_release,
288 .set_params = tda18212_set_params,
289 .get_if_frequency = tda18212_get_if_frequency,
292 struct dvb_frontend *tda18212_attach(struct dvb_frontend *fe,
293 struct i2c_adapter *i2c, struct tda18212_config *cfg)
295 struct tda18212_priv *priv = NULL;
299 priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
305 fe->tuner_priv = priv;
307 if (fe->ops.i2c_gate_ctrl)
308 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
310 /* check if the tuner is there */
311 ret = tda18212_rd_reg(priv, 0x00, &val);
313 if (fe->ops.i2c_gate_ctrl)
314 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
317 dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val);
318 if (ret || val != 0xc7) {
323 dev_info(&priv->i2c->dev,
324 "%s: NXP TDA18212HN successfully identified\n",
327 memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
328 sizeof(struct dvb_tuner_ops));
332 EXPORT_SYMBOL(tda18212_attach);
334 MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
335 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
336 MODULE_LICENSE("GPL");