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path: root/drivers/media/tuners/fc0013.c
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Diffstat (limited to 'drivers/media/tuners/fc0013.c')
-rw-r--r--drivers/media/tuners/fc0013.c634
1 files changed, 634 insertions, 0 deletions
diff --git a/drivers/media/tuners/fc0013.c b/drivers/media/tuners/fc0013.c
new file mode 100644
index 000000000000..bd8f0f1e8f3b
--- /dev/null
+++ b/drivers/media/tuners/fc0013.c
@@ -0,0 +1,634 @@
+/*
+ * Fitipower FC0013 tuner driver
+ *
+ * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
+ * partially based on driver code from Fitipower
+ * Copyright (C) 2010 Fitipower Integrated Technology Inc
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include "fc0013.h"
+#include "fc0013-priv.h"
+
+static int fc0013_writereg(struct fc0013_priv *priv, u8 reg, u8 val)
+{
+ u8 buf[2] = {reg, val};
+ struct i2c_msg msg = {
+ .addr = priv->addr, .flags = 0, .buf = buf, .len = 2
+ };
+
+ if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+ err("I2C write reg failed, reg: %02x, val: %02x", reg, val);
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+static int fc0013_readreg(struct fc0013_priv *priv, u8 reg, u8 *val)
+{
+ struct i2c_msg msg[2] = {
+ { .addr = priv->addr, .flags = 0, .buf = &reg, .len = 1 },
+ { .addr = priv->addr, .flags = I2C_M_RD, .buf = val, .len = 1 },
+ };
+
+ if (i2c_transfer(priv->i2c, msg, 2) != 2) {
+ err("I2C read reg failed, reg: %02x", reg);
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+static int fc0013_release(struct dvb_frontend *fe)
+{
+ kfree(fe->tuner_priv);
+ fe->tuner_priv = NULL;
+ return 0;
+}
+
+static int fc0013_init(struct dvb_frontend *fe)
+{
+ struct fc0013_priv *priv = fe->tuner_priv;
+ int i, ret = 0;
+ unsigned char reg[] = {
+ 0x00, /* reg. 0x00: dummy */
+ 0x09, /* reg. 0x01 */
+ 0x16, /* reg. 0x02 */
+ 0x00, /* reg. 0x03 */
+ 0x00, /* reg. 0x04 */
+ 0x17, /* reg. 0x05 */
+ 0x02, /* reg. 0x06 */
+ 0x0a, /* reg. 0x07: CHECK */
+ 0xff, /* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256,
+ Loop Bw 1/8 */
+ 0x6f, /* reg. 0x09: enable LoopThrough */
+ 0xb8, /* reg. 0x0a: Disable LO Test Buffer */
+ 0x82, /* reg. 0x0b: CHECK */
+ 0xfc, /* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */
+ 0x01, /* reg. 0x0d: AGC Not Forcing & LNA Forcing, may need 0x02 */
+ 0x00, /* reg. 0x0e */
+ 0x00, /* reg. 0x0f */
+ 0x00, /* reg. 0x10 */
+ 0x00, /* reg. 0x11 */
+ 0x00, /* reg. 0x12 */
+ 0x00, /* reg. 0x13 */
+ 0x50, /* reg. 0x14: DVB-t High Gain, UHF.
+ Middle Gain: 0x48, Low Gain: 0x40 */
+ 0x01, /* reg. 0x15 */
+ };
+
+ switch (priv->xtal_freq) {
+ case FC_XTAL_27_MHZ:
+ case FC_XTAL_28_8_MHZ:
+ reg[0x07] |= 0x20;
+ break;
+ case FC_XTAL_36_MHZ:
+ default:
+ break;
+ }
+
+ if (priv->dual_master)
+ reg[0x0c] |= 0x02;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+ for (i = 1; i < sizeof(reg); i++) {
+ ret = fc0013_writereg(priv, i, reg[i]);
+ if (ret)
+ break;
+ }
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+ if (ret)
+ err("fc0013_writereg failed: %d", ret);
+
+ return ret;
+}
+
+static int fc0013_sleep(struct dvb_frontend *fe)
+{
+ /* nothing to do here */
+ return 0;
+}
+
+int fc0013_rc_cal_add(struct dvb_frontend *fe, int rc_val)
+{
+ struct fc0013_priv *priv = fe->tuner_priv;
+ int ret;
+ u8 rc_cal;
+ int val;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+ /* push rc_cal value, get rc_cal value */
+ ret = fc0013_writereg(priv, 0x10, 0x00);
+ if (ret)
+ goto error_out;
+
+ /* get rc_cal value */
+ ret = fc0013_readreg(priv, 0x10, &rc_cal);
+ if (ret)
+ goto error_out;
+
+ rc_cal &= 0x0f;
+
+ val = (int)rc_cal + rc_val;
+
+ /* forcing rc_cal */
+ ret = fc0013_writereg(priv, 0x0d, 0x11);
+ if (ret)
+ goto error_out;
+
+ /* modify rc_cal value */
+ if (val > 15)
+ ret = fc0013_writereg(priv, 0x10, 0x0f);
+ else if (val < 0)
+ ret = fc0013_writereg(priv, 0x10, 0x00);
+ else
+ ret = fc0013_writereg(priv, 0x10, (u8)val);
+
+error_out:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+ return ret;
+}
+EXPORT_SYMBOL(fc0013_rc_cal_add);
+
+int fc0013_rc_cal_reset(struct dvb_frontend *fe)
+{
+ struct fc0013_priv *priv = fe->tuner_priv;
+ int ret;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+ ret = fc0013_writereg(priv, 0x0d, 0x01);
+ if (!ret)
+ ret = fc0013_writereg(priv, 0x10, 0x00);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+ return ret;
+}
+EXPORT_SYMBOL(fc0013_rc_cal_reset);
+
+static int fc0013_set_vhf_track(struct fc0013_priv *priv, u32 freq)
+{
+ int ret;
+ u8 tmp;
+
+ ret = fc0013_readreg(priv, 0x1d, &tmp);
+ if (ret)
+ goto error_out;
+ tmp &= 0xe3;
+ if (freq <= 177500) { /* VHF Track: 7 */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
+ } else if (freq <= 184500) { /* VHF Track: 6 */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x18);
+ } else if (freq <= 191500) { /* VHF Track: 5 */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x14);
+ } else if (freq <= 198500) { /* VHF Track: 4 */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x10);
+ } else if (freq <= 205500) { /* VHF Track: 3 */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x0c);
+ } else if (freq <= 219500) { /* VHF Track: 2 */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x08);
+ } else if (freq < 300000) { /* VHF Track: 1 */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x04);
+ } else { /* UHF and GPS */
+ ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
+ }
+ if (ret)
+ goto error_out;
+error_out:
+ return ret;
+}
+
+static int fc0013_set_params(struct dvb_frontend *fe)
+{
+ struct fc0013_priv *priv = fe->tuner_priv;
+ int i, ret = 0;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ u32 freq = p->frequency / 1000;
+ u32 delsys = p->delivery_system;
+ unsigned char reg[7], am, pm, multi, tmp;
+ unsigned long f_vco;
+ unsigned short xtal_freq_khz_2, xin, xdiv;
+ int vco_select = false;
+
+ if (fe->callback) {
+ ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
+ FC_FE_CALLBACK_VHF_ENABLE, (freq > 300000 ? 0 : 1));
+ if (ret)
+ goto exit;
+ }
+
+ switch (priv->xtal_freq) {
+ case FC_XTAL_27_MHZ:
+ xtal_freq_khz_2 = 27000 / 2;
+ break;
+ case FC_XTAL_36_MHZ:
+ xtal_freq_khz_2 = 36000 / 2;
+ break;
+ case FC_XTAL_28_8_MHZ:
+ default:
+ xtal_freq_khz_2 = 28800 / 2;
+ break;
+ }
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+ /* set VHF track */
+ ret = fc0013_set_vhf_track(priv, freq);
+ if (ret)
+ goto exit;
+
+ if (freq < 300000) {
+ /* enable VHF filter */
+ ret = fc0013_readreg(priv, 0x07, &tmp);
+ if (ret)
+ goto exit;
+ ret = fc0013_writereg(priv, 0x07, tmp | 0x10);
+ if (ret)
+ goto exit;
+
+ /* disable UHF & disable GPS */
+ ret = fc0013_readreg(priv, 0x14, &tmp);
+ if (ret)
+ goto exit;
+ ret = fc0013_writereg(priv, 0x14, tmp & 0x1f);
+ if (ret)
+ goto exit;
+ } else if (freq <= 862000) {
+ /* disable VHF filter */
+ ret = fc0013_readreg(priv, 0x07, &tmp);
+ if (ret)
+ goto exit;
+ ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
+ if (ret)
+ goto exit;
+
+ /* enable UHF & disable GPS */
+ ret = fc0013_readreg(priv, 0x14, &tmp);
+ if (ret)
+ goto exit;
+ ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x40);
+ if (ret)
+ goto exit;
+ } else {
+ /* disable VHF filter */
+ ret = fc0013_readreg(priv, 0x07, &tmp);
+ if (ret)
+ goto exit;
+ ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
+ if (ret)
+ goto exit;
+
+ /* disable UHF & enable GPS */
+ ret = fc0013_readreg(priv, 0x14, &tmp);
+ if (ret)
+ goto exit;
+ ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x20);
+ if (ret)
+ goto exit;
+ }
+
+ /* select frequency divider and the frequency of VCO */
+ if (freq < 37084) { /* freq * 96 < 3560000 */
+ multi = 96;
+ reg[5] = 0x82;
+ reg[6] = 0x00;
+ } else if (freq < 55625) { /* freq * 64 < 3560000 */
+ multi = 64;
+ reg[5] = 0x02;
+ reg[6] = 0x02;
+ } else if (freq < 74167) { /* freq * 48 < 3560000 */
+ multi = 48;
+ reg[5] = 0x42;
+ reg[6] = 0x00;
+ } else if (freq < 111250) { /* freq * 32 < 3560000 */
+ multi = 32;
+ reg[5] = 0x82;
+ reg[6] = 0x02;
+ } else if (freq < 148334) { /* freq * 24 < 3560000 */
+ multi = 24;
+ reg[5] = 0x22;
+ reg[6] = 0x00;
+ } else if (freq < 222500) { /* freq * 16 < 3560000 */
+ multi = 16;
+ reg[5] = 0x42;
+ reg[6] = 0x02;
+ } else if (freq < 296667) { /* freq * 12 < 3560000 */
+ multi = 12;
+ reg[5] = 0x12;
+ reg[6] = 0x00;
+ } else if (freq < 445000) { /* freq * 8 < 3560000 */
+ multi = 8;
+ reg[5] = 0x22;
+ reg[6] = 0x02;
+ } else if (freq < 593334) { /* freq * 6 < 3560000 */
+ multi = 6;
+ reg[5] = 0x0a;
+ reg[6] = 0x00;
+ } else if (freq < 950000) { /* freq * 4 < 3800000 */
+ multi = 4;
+ reg[5] = 0x12;
+ reg[6] = 0x02;
+ } else {
+ multi = 2;
+ reg[5] = 0x0a;
+ reg[6] = 0x02;
+ }
+
+ f_vco = freq * multi;
+
+ if (f_vco >= 3060000) {
+ reg[6] |= 0x08;
+ vco_select = true;
+ }
+
+ if (freq >= 45000) {
+ /* From divided value (XDIV) determined the FA and FP value */
+ xdiv = (unsigned short)(f_vco / xtal_freq_khz_2);
+ if ((f_vco - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2))
+ xdiv++;
+
+ pm = (unsigned char)(xdiv / 8);
+ am = (unsigned char)(xdiv - (8 * pm));
+
+ if (am < 2) {
+ reg[1] = am + 8;
+ reg[2] = pm - 1;
+ } else {
+ reg[1] = am;
+ reg[2] = pm;
+ }
+ } else {
+ /* fix for frequency less than 45 MHz */
+ reg[1] = 0x06;
+ reg[2] = 0x11;
+ }
+
+ /* fix clock out */
+ reg[6] |= 0x20;
+
+ /* From VCO frequency determines the XIN ( fractional part of Delta
+ Sigma PLL) and divided value (XDIV) */
+ xin = (unsigned short)(f_vco - (f_vco / xtal_freq_khz_2) * xtal_freq_khz_2);
+ xin = (xin << 15) / xtal_freq_khz_2;
+ if (xin >= 16384)
+ xin += 32768;
+
+ reg[3] = xin >> 8;
+ reg[4] = xin & 0xff;
+
+ if (delsys == SYS_DVBT) {
+ reg[6] &= 0x3f; /* bits 6 and 7 describe the bandwidth */
+ switch (p->bandwidth_hz) {
+ case 6000000:
+ reg[6] |= 0x80;
+ break;
+ case 7000000:
+ reg[6] |= 0x40;
+ break;
+ case 8000000:
+ default:
+ break;
+ }
+ } else {
+ err("%s: modulation type not supported!", __func__);
+ return -EINVAL;
+ }
+
+ /* modified for Realtek demod */
+ reg[5] |= 0x07;
+
+ for (i = 1; i <= 6; i++) {
+ ret = fc0013_writereg(priv, i, reg[i]);
+ if (ret)
+ goto exit;
+ }
+
+ ret = fc0013_readreg(priv, 0x11, &tmp);
+ if (ret)
+ goto exit;
+ if (multi == 64)
+ ret = fc0013_writereg(priv, 0x11, tmp | 0x04);
+ else
+ ret = fc0013_writereg(priv, 0x11, tmp & 0xfb);
+ if (ret)
+ goto exit;
+
+ /* VCO Calibration */
+ ret = fc0013_writereg(priv, 0x0e, 0x80);
+ if (!ret)
+ ret = fc0013_writereg(priv, 0x0e, 0x00);
+
+ /* VCO Re-Calibration if needed */
+ if (!ret)
+ ret = fc0013_writereg(priv, 0x0e, 0x00);
+
+ if (!ret) {
+ msleep(10);
+ ret = fc0013_readreg(priv, 0x0e, &tmp);
+ }
+ if (ret)
+ goto exit;
+
+ /* vco selection */
+ tmp &= 0x3f;
+
+ if (vco_select) {
+ if (tmp > 0x3c) {
+ reg[6] &= ~0x08;
+ ret = fc0013_writereg(priv, 0x06, reg[6]);
+ if (!ret)
+ ret = fc0013_writereg(priv, 0x0e, 0x80);
+ if (!ret)
+ ret = fc0013_writereg(priv, 0x0e, 0x00);
+ }
+ } else {
+ if (tmp < 0x02) {
+ reg[6] |= 0x08;
+ ret = fc0013_writereg(priv, 0x06, reg[6]);
+ if (!ret)
+ ret = fc0013_writereg(priv, 0x0e, 0x80);
+ if (!ret)
+ ret = fc0013_writereg(priv, 0x0e, 0x00);
+ }
+ }
+
+ priv->frequency = p->frequency;
+ priv->bandwidth = p->bandwidth_hz;
+
+exit:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+ if (ret)
+ warn("%s: failed: %d", __func__, ret);
+ return ret;
+}
+
+static int fc0013_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct fc0013_priv *priv = fe->tuner_priv;
+ *frequency = priv->frequency;
+ return 0;
+}
+
+static int fc0013_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ /* always ? */
+ *frequency = 0;
+ return 0;
+}
+
+static int fc0013_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+ struct fc0013_priv *priv = fe->tuner_priv;
+ *bandwidth = priv->bandwidth;
+ return 0;
+}
+
+#define INPUT_ADC_LEVEL -8
+
+static int fc0013_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ struct fc0013_priv *priv = fe->tuner_priv;
+ int ret;
+ unsigned char tmp;
+ int int_temp, lna_gain, int_lna, tot_agc_gain, power;
+ const int fc0013_lna_gain_table[] = {
+ /* low gain */
+ -63, -58, -99, -73,
+ -63, -65, -54, -60,
+ /* middle gain */
+ 71, 70, 68, 67,
+ 65, 63, 61, 58,
+ /* high gain */
+ 197, 191, 188, 186,
+ 184, 182, 181, 179,
+ };
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+ ret = fc0013_writereg(priv, 0x13, 0x00);
+ if (ret)
+ goto err;
+
+ ret = fc0013_readreg(priv, 0x13, &tmp);
+ if (ret)
+ goto err;
+ int_temp = tmp;
+
+ ret = fc0013_readreg(priv, 0x14, &tmp);
+ if (ret)
+ goto err;
+ lna_gain = tmp & 0x1f;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+ if (lna_gain < ARRAY_SIZE(fc0013_lna_gain_table)) {
+ int_lna = fc0013_lna_gain_table[lna_gain];
+ tot_agc_gain = (abs((int_temp >> 5) - 7) - 2 +
+ (int_temp & 0x1f)) * 2;
+ power = INPUT_ADC_LEVEL - tot_agc_gain - int_lna / 10;
+
+ if (power >= 45)
+ *strength = 255; /* 100% */
+ else if (power < -95)
+ *strength = 0;
+ else
+ *strength = (power + 95) * 255 / 140;
+
+ *strength |= *strength << 8;
+ } else {
+ ret = -1;
+ }
+
+ goto exit;
+
+err:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+exit:
+ if (ret)
+ warn("%s: failed: %d", __func__, ret);
+ return ret;
+}
+
+static const struct dvb_tuner_ops fc0013_tuner_ops = {
+ .info = {
+ .name = "Fitipower FC0013",
+
+ .frequency_min = 37000000, /* estimate */
+ .frequency_max = 1680000000, /* CHECK */
+ .frequency_step = 0,
+ },
+
+ .release = fc0013_release,
+
+ .init = fc0013_init,
+ .sleep = fc0013_sleep,
+
+ .set_params = fc0013_set_params,
+
+ .get_frequency = fc0013_get_frequency,
+ .get_if_frequency = fc0013_get_if_frequency,
+ .get_bandwidth = fc0013_get_bandwidth,
+
+ .get_rf_strength = fc0013_get_rf_strength,
+};
+
+struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, u8 i2c_address, int dual_master,
+ enum fc001x_xtal_freq xtal_freq)
+{
+ struct fc0013_priv *priv = NULL;
+
+ priv = kzalloc(sizeof(struct fc0013_priv), GFP_KERNEL);
+ if (priv == NULL)
+ return NULL;
+
+ priv->i2c = i2c;
+ priv->dual_master = dual_master;
+ priv->addr = i2c_address;
+ priv->xtal_freq = xtal_freq;
+
+ info("Fitipower FC0013 successfully attached.");
+
+ fe->tuner_priv = priv;
+
+ memcpy(&fe->ops.tuner_ops, &fc0013_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+
+ return fe;
+}
+EXPORT_SYMBOL(fc0013_attach);
+
+MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver");
+MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 05:42:43 +0100