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path: root/drivers/media/tuners/tda18212.c
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Diffstat (limited to 'drivers/media/tuners/tda18212.c')
-rw-r--r--drivers/media/tuners/tda18212.c319
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 0000000..5d9f028
--- /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 = &reg,
+ }, {
+ .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");
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