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");