[media] Sony CXD2820R DVB-T/T2/C demodulator driver

It is very first DVB-T2 Linux driver!

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 421 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/cxd2820r_t2.c b/drivers/media/dvb/frontends/cxd2820r_t2.c
new file mode 100644
index 000000000000..6ec94ea77f15
--- /dev/null
+++ b/drivers/media/dvb/frontends/cxd2820r_t2.c
@@ -0,0 +1,421 @@
+/*
+ * Sony CXD2820R demodulator driver
+ *
+ * Copyright (C) 2010 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.
+ */
+
+
+static int cxd2820r_set_frontend_t2(struct dvb_frontend *fe,
+        struct dvb_frontend_parameters *params)
+{
+        struct cxd2820r_priv *priv = fe->demodulator_priv;
+        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        int ret, i;
+        u32 if_khz, if_ctl;
+        u64 num;
+        u8 buf[3], bw_param;
+        u8 bw_params1[][5] = {
+                { 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
+                { 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
+                { 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
+                { 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
+        };
+        struct reg_val_mask tab[] = {
+                { 0x00080, 0x02, 0xff },
+                { 0x00081, 0x20, 0xff },
+                { 0x00085, 0x07, 0xff },
+                { 0x00088, 0x01, 0xff },
+                { 0x02069, 0x01, 0xff },
+
+                { 0x0207f, 0x2a, 0xff },
+                { 0x02082, 0x0a, 0xff },
+                { 0x02083, 0x0a, 0xff },
+                { 0x020cb, priv->cfg.if_agc_polarity << 6, 0x40 },
+                { 0x02070, priv->cfg.ts_mode, 0xff },
+                { 0x020b5, priv->cfg.spec_inv << 4, 0x10 },
+                { 0x02567, 0x07, 0x0f },
+                { 0x02569, 0x03, 0x03 },
+                { 0x02595, 0x1a, 0xff },
+                { 0x02596, 0x50, 0xff },
+                { 0x02a8c, 0x00, 0xff },
+                { 0x02a8d, 0x34, 0xff },
+                { 0x02a45, 0x06, 0x07 },
+                { 0x03f10, 0x0d, 0xff },
+                { 0x03f11, 0x02, 0xff },
+                { 0x03f12, 0x01, 0xff },
+                { 0x03f23, 0x2c, 0xff },
+                { 0x03f51, 0x13, 0xff },
+                { 0x03f52, 0x01, 0xff },
+                { 0x03f53, 0x00, 0xff },
+                { 0x027e6, 0x14, 0xff },
+                { 0x02786, 0x02, 0x07 },
+                { 0x02787, 0x40, 0xe0 },
+                { 0x027ef, 0x10, 0x18 },
+        };
+
+        dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
+
+        /* update GPIOs */
+        ret = cxd2820r_gpio(fe);
+        if (ret)
+                goto error;
+
+        /* program tuner */
+        if (fe->ops.tuner_ops.set_params)
+                fe->ops.tuner_ops.set_params(fe, params);
+
+        if (priv->delivery_system != SYS_DVBT2) {
+                for (i = 0; i < ARRAY_SIZE(tab); i++) {
+                        ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
+                                tab[i].val, tab[i].mask);
+                        if (ret)
+                                goto error;
+                }
+        }
+
+        priv->delivery_system = SYS_DVBT2;
+
+        switch (c->bandwidth_hz) {
+        case 5000000:
+                if_khz = priv->cfg.if_dvbt2_5;
+                i = 0;
+                bw_param = 3;
+                break;
+        case 6000000:
+                if_khz = priv->cfg.if_dvbt2_6;
+                i = 1;
+                bw_param = 2;
+                break;
+        case 7000000:
+                if_khz = priv->cfg.if_dvbt2_7;
+                i = 2;
+                bw_param = 1;
+                break;
+        case 8000000:
+                if_khz = priv->cfg.if_dvbt2_8;
+                i = 3;
+                bw_param = 0;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        num = if_khz;
+        num *= 0x1000000;
+        if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
+        buf[0] = ((if_ctl >> 16) & 0xff);
+        buf[1] = ((if_ctl >>  8) & 0xff);
+        buf[2] = ((if_ctl >>  0) & 0xff);
+
+        ret = cxd2820r_wr_regs(priv, 0x020b6, buf, 3);
+        if (ret)
+                goto error;
+
+        ret = cxd2820r_wr_regs(priv, 0x0209f, bw_params1[i], 5);
+        if (ret)
+                goto error;
+
+        ret = cxd2820r_wr_reg_mask(priv, 0x020d7, bw_param << 6, 0xc0);
+        if (ret)
+                goto error;
+
+        ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
+        if (ret)
+                goto error;
+
+        ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
+        if (ret)
+                goto error;
+
+        return ret;
+error:
+        dbg("%s: failed:%d", __func__, ret);
+        return ret;
+
+}
+
+static int cxd2820r_get_frontend_t2(struct dvb_frontend *fe,
+        struct dvb_frontend_parameters *p)
+{
+        struct cxd2820r_priv *priv = fe->demodulator_priv;
+        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        int ret;
+        u8 buf[2];
+
+        ret = cxd2820r_rd_regs(priv, 0x0205c, buf, 2);
+        if (ret)
+                goto error;
+
+        switch ((buf[0] >> 0) & 0x07) {
+        case 0:
+                c->transmission_mode = TRANSMISSION_MODE_2K;
+                break;
+        case 1:
+                c->transmission_mode = TRANSMISSION_MODE_8K;
+                break;
+        case 2:
+                c->transmission_mode = TRANSMISSION_MODE_4K;
+                break;
+        case 3:
+                c->transmission_mode = TRANSMISSION_MODE_1K;
+                break;
+        case 4:
+                c->transmission_mode = TRANSMISSION_MODE_16K;
+                break;
+        case 5:
+                c->transmission_mode = TRANSMISSION_MODE_32K;
+                break;
+        }
+
+        switch ((buf[1] >> 4) & 0x07) {
+        case 0:
+                c->guard_interval = GUARD_INTERVAL_1_32;
+                break;
+        case 1:
+                c->guard_interval = GUARD_INTERVAL_1_16;
+                break;
+        case 2:
+                c->guard_interval = GUARD_INTERVAL_1_8;
+                break;
+        case 3:
+                c->guard_interval = GUARD_INTERVAL_1_4;
+                break;
+        case 4:
+                c->guard_interval = GUARD_INTERVAL_1_128;
+                break;
+        case 5:
+                c->guard_interval = GUARD_INTERVAL_19_128;
+                break;
+        case 6:
+                c->guard_interval = GUARD_INTERVAL_19_256;
+                break;
+        }
+
+        ret = cxd2820r_rd_regs(priv, 0x0225b, buf, 2);
+        if (ret)
+                goto error;
+
+        switch ((buf[0] >> 0) & 0x07) {
+        case 0:
+                c->fec_inner = FEC_1_2;
+                break;
+        case 1:
+                c->fec_inner = FEC_3_5;
+                break;
+        case 2:
+                c->fec_inner = FEC_2_3;
+                break;
+        case 3:
+                c->fec_inner = FEC_3_4;
+                break;
+        case 4:
+                c->fec_inner = FEC_4_5;
+                break;
+        case 5:
+                c->fec_inner = FEC_5_6;
+                break;
+        }
+
+        switch ((buf[1] >> 0) & 0x07) {
+        case 0:
+                c->modulation = QPSK;
+                break;
+        case 1:
+                c->modulation = QAM_16;
+                break;
+        case 2:
+                c->modulation = QAM_64;
+                break;
+        case 3:
+                c->modulation = QAM_256;
+                break;
+        }
+
+        ret = cxd2820r_rd_reg(priv, 0x020b5, &buf[0]);
+        if (ret)
+                goto error;
+
+        switch ((buf[0] >> 4) & 0x01) {
+        case 0:
+                c->inversion = INVERSION_OFF;
+                break;
+        case 1:
+                c->inversion = INVERSION_ON;
+                break;
+        }
+
+        return ret;
+error:
+        dbg("%s: failed:%d", __func__, ret);
+        return ret;
+}
+
+static int cxd2820r_read_status_t2(struct dvb_frontend *fe, fe_status_t *status)
+{
+        struct cxd2820r_priv *priv = fe->demodulator_priv;
+        int ret;
+        u8 buf[1];
+        *status = 0;
+
+        ret = cxd2820r_rd_reg(priv, 0x02010 , &buf[0]);
+        if (ret)
+                goto error;
+
+        if ((buf[0] & 0x07) == 6) {
+                if (((buf[0] >> 5) & 0x01) == 1) {
+                        *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+                                FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+                } else {
+                        *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+                                FE_HAS_VITERBI | FE_HAS_SYNC;
+                }
+        }
+
+        dbg("%s: lock=%02x", __func__, buf[0]);
+
+        return ret;
+error:
+        dbg("%s: failed:%d", __func__, ret);
+        return ret;
+}
+
+static int cxd2820r_read_ber_t2(struct dvb_frontend *fe, u32 *ber)
+{
+        struct cxd2820r_priv *priv = fe->demodulator_priv;
+        int ret;
+        u8 buf[4];
+        unsigned int errbits;
+        *ber = 0;
+        /* FIXME: correct calculation */
+
+        ret = cxd2820r_rd_regs(priv, 0x02039, buf, sizeof(buf));
+        if (ret)
+                goto error;
+
+        if ((buf[0] >> 4) & 0x01) {
+                errbits = (buf[0] & 0x0f) << 24 | buf[1] << 16 |
+                        buf[2] << 8 | buf[3];
+
+                if (errbits)
+                        *ber = errbits * 64 / 16588800;
+        }
+
+        return ret;
+error:
+        dbg("%s: failed:%d", __func__, ret);
+        return ret;
+}
+
+static int cxd2820r_read_signal_strength_t2(struct dvb_frontend *fe,
+        u16 *strength)
+{
+        struct cxd2820r_priv *priv = fe->demodulator_priv;
+        int ret;
+        u8 buf[2];
+        u16 tmp;
+
+        ret = cxd2820r_rd_regs(priv, 0x02026, buf, sizeof(buf));
+        if (ret)
+                goto error;
+
+        tmp = (buf[0] & 0x0f) << 8 | buf[1];
+        tmp = ~tmp & 0x0fff;
+
+        /* scale value to 0x0000-0xffff from 0x0000-0x0fff */
+        *strength = tmp * 0xffff / 0x0fff;
+
+        return ret;
+error:
+        dbg("%s: failed:%d", __func__, ret);
+        return ret;
+}
+
+static int cxd2820r_read_snr_t2(struct dvb_frontend *fe, u16 *snr)
+{
+        struct cxd2820r_priv *priv = fe->demodulator_priv;
+        int ret;
+        u8 buf[2];
+        u16 tmp;
+        /* report SNR in dB * 10 */
+
+        ret = cxd2820r_rd_regs(priv, 0x02028, buf, sizeof(buf));
+        if (ret)
+                goto error;
+
+        tmp = (buf[0] & 0x0f) << 8 | buf[1];
+        #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
+        if (tmp)
+                *snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
+                        / 100);
+        else
+                *snr = 0;
+
+        dbg("%s: dBx10=%d val=%04x", __func__, *snr, tmp);
+
+        return ret;
+error:
+        dbg("%s: failed:%d", __func__, ret);
+        return ret;
+}
+
+static int cxd2820r_read_ucblocks_t2(struct dvb_frontend *fe, u32 *ucblocks)
+{
+        *ucblocks = 0;
+        /* no way to read ? */
+        return 0;
+}
+
+static int cxd2820r_sleep_t2(struct dvb_frontend *fe)
+{
+        struct cxd2820r_priv *priv = fe->demodulator_priv;
+        int ret, i;
+        struct reg_val_mask tab[] = {
+                { 0x000ff, 0x1f, 0xff },
+                { 0x00085, 0x00, 0xff },
+                { 0x00088, 0x01, 0xff },
+                { 0x02069, 0x00, 0xff },
+                { 0x00081, 0x00, 0xff },
+                { 0x00080, 0x00, 0xff },
+        };
+
+        dbg("%s", __func__);
+
+        for (i = 0; i < ARRAY_SIZE(tab); i++) {
+                ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
+                        tab[i].mask);
+                if (ret)
+                        goto error;
+        }
+
+        priv->delivery_system = SYS_UNDEFINED;
+
+        return ret;
+error:
+        dbg("%s: failed:%d", __func__, ret);
+        return ret;
+}
+
+static int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
+        struct dvb_frontend_tune_settings *s)
+{
+        s->min_delay_ms = 1500;
+        s->step_size = fe->ops.info.frequency_stepsize * 2;
+        s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
+
+        return 0;
+}
+