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.
21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 struct tda18212_priv {
26 struct tda18212_config *cfg;
27 struct i2c_adapter *i2c;
32 #define dbg(fmt, arg...) \
35 pr_info("%s: " fmt, __func__, ##arg); \
39 module_param(debug, int, 0644);
40 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
42 /* write multiple registers */
43 static int tda18212_wr_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
48 struct i2c_msg msg[1] = {
50 .addr = priv->cfg->i2c_address,
58 memcpy(&buf[1], val, len);
60 ret = i2c_transfer(priv->i2c, msg, 1);
64 pr_warn("i2c wr failed ret:%d reg:%02x len:%d\n",
71 /* read multiple registers */
72 static int tda18212_rd_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
77 struct i2c_msg msg[2] = {
79 .addr = priv->cfg->i2c_address,
84 .addr = priv->cfg->i2c_address,
91 ret = i2c_transfer(priv->i2c, msg, 2);
93 memcpy(val, buf, len);
96 pr_warn("i2c rd failed ret:%d reg:%02x len:%d\n",
104 /* write single register */
105 static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
107 return tda18212_wr_regs(priv, reg, &val, 1);
110 /* read single register */
111 static int tda18212_rd_reg(struct tda18212_priv *priv, u8 reg, u8 *val)
113 return tda18212_rd_regs(priv, reg, val, 1);
116 #if 0 /* keep, useful when developing driver */
117 static void tda18212_dump_regs(struct tda18212_priv *priv)
122 #define TDA18212_RD_LEN 32
123 for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
124 tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);
126 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
133 static int tda18212_set_params(struct dvb_frontend *fe)
135 struct tda18212_priv *priv = fe->tuner_priv;
136 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
148 static const u8 bw_params[][3] = {
150 [DVBT_6] = { 0xb3, 0x20, 0x03 },
151 [DVBT_7] = { 0xb3, 0x31, 0x01 },
152 [DVBT_8] = { 0xb3, 0x22, 0x01 },
153 [DVBT2_6] = { 0xbc, 0x20, 0x03 },
154 [DVBT2_7] = { 0xbc, 0x72, 0x03 },
155 [DVBT2_8] = { 0xbc, 0x22, 0x01 },
156 [DVBC_6] = { 0x92, 0x50, 0x03 },
157 [DVBC_8] = { 0x92, 0x53, 0x03 },
160 dbg("delsys=%d RF=%d BW=%d\n",
161 c->delivery_system, c->frequency, c->bandwidth_hz);
163 if (fe->ops.i2c_gate_ctrl)
164 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
166 switch (c->delivery_system) {
168 switch (c->bandwidth_hz) {
170 if_khz = priv->cfg->if_dvbt_6;
174 if_khz = priv->cfg->if_dvbt_7;
178 if_khz = priv->cfg->if_dvbt_8;
187 switch (c->bandwidth_hz) {
189 if_khz = priv->cfg->if_dvbt2_6;
193 if_khz = priv->cfg->if_dvbt2_7;
197 if_khz = priv->cfg->if_dvbt2_8;
205 case SYS_DVBC_ANNEX_A:
206 case SYS_DVBC_ANNEX_C:
207 if_khz = priv->cfg->if_dvbc;
215 ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
219 ret = tda18212_wr_reg(priv, 0x06, 0x00);
223 ret = tda18212_wr_reg(priv, 0x0f, bw_params[i][0]);
228 buf[1] = bw_params[i][1];
229 buf[2] = 0x03; /* default value */
230 buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
231 buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
232 buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
233 buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
236 ret = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
240 /* actual IF rounded as it is on register */
241 priv->if_frequency = buf[3] * 50 * 1000;
244 if (fe->ops.i2c_gate_ctrl)
245 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
250 dbg("failed:%d\n", ret);
254 static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
256 struct tda18212_priv *priv = fe->tuner_priv;
258 *frequency = priv->if_frequency;
263 static int tda18212_release(struct dvb_frontend *fe)
265 kfree(fe->tuner_priv);
266 fe->tuner_priv = NULL;
270 static const struct dvb_tuner_ops tda18212_tuner_ops = {
272 .name = "NXP TDA18212",
274 .frequency_min = 48000000,
275 .frequency_max = 864000000,
276 .frequency_step = 1000,
279 .release = tda18212_release,
281 .set_params = tda18212_set_params,
282 .get_if_frequency = tda18212_get_if_frequency,
285 struct dvb_frontend *tda18212_attach(struct dvb_frontend *fe,
286 struct i2c_adapter *i2c, struct tda18212_config *cfg)
288 struct tda18212_priv *priv = NULL;
292 priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
298 fe->tuner_priv = priv;
300 if (fe->ops.i2c_gate_ctrl)
301 fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
303 /* check if the tuner is there */
304 ret = tda18212_rd_reg(priv, 0x00, &val);
306 if (fe->ops.i2c_gate_ctrl)
307 fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
309 dbg("ret:%d chip ID:%02x\n", ret, val);
310 if (ret || val != 0xc7) {
315 pr_info("NXP TDA18212HN successfully identified\n");
317 memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
318 sizeof(struct dvb_tuner_ops));
322 EXPORT_SYMBOL(tda18212_attach);
324 MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
325 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
326 MODULE_LICENSE("GPL");