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path: root/drivers/media/dvb-frontends/cxd2820r_c.c
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Diffstat (limited to 'drivers/media/dvb-frontends/cxd2820r_c.c')
-rw-r--r--drivers/media/dvb-frontends/cxd2820r_c.c346
1 files changed, 346 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2820r_c.c b/drivers/media/dvb-frontends/cxd2820r_c.c
new file mode 100644
index 000000000000..ed3b0ba624de
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2820r_c.c
@@ -0,0 +1,346 @@
+/*
+ * 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.
+ */
+
+
+#include "cxd2820r_priv.h"
+
+int cxd2820r_set_frontend_c(struct dvb_frontend *fe)
+{
+ struct cxd2820r_priv *priv = fe->demodulator_priv;
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ int ret, i;
+ u8 buf[2];
+ u32 if_freq;
+ u16 if_ctl;
+ u64 num;
+ struct reg_val_mask tab[] = {
+ { 0x00080, 0x01, 0xff },
+ { 0x00081, 0x05, 0xff },
+ { 0x00085, 0x07, 0xff },
+ { 0x00088, 0x01, 0xff },
+
+ { 0x00082, 0x20, 0x60 },
+ { 0x1016a, 0x48, 0xff },
+ { 0x100a5, 0x00, 0x01 },
+ { 0x10020, 0x06, 0x07 },
+ { 0x10059, 0x50, 0xff },
+ { 0x10087, 0x0c, 0x3c },
+ { 0x1008b, 0x07, 0xff },
+ { 0x1001f, priv->cfg.if_agc_polarity << 7, 0x80 },
+ { 0x10070, priv->cfg.ts_mode, 0xff },
+ };
+
+ dbg("%s: RF=%d SR=%d", __func__, c->frequency, c->symbol_rate);
+
+ /* 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);
+
+ if (priv->delivery_system != SYS_DVBC_ANNEX_A) {
+ 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_DVBC_ANNEX_A;
+ priv->ber_running = 0; /* tune stops BER counter */
+
+ /* program IF frequency */
+ if (fe->ops.tuner_ops.get_if_frequency) {
+ ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
+ if (ret)
+ goto error;
+ } else
+ if_freq = 0;
+
+ dbg("%s: if_freq=%d", __func__, if_freq);
+
+ num = if_freq / 1000; /* Hz => kHz */
+ num *= 0x4000;
+ if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
+ buf[0] = (if_ctl >> 8) & 0x3f;
+ buf[1] = (if_ctl >> 0) & 0xff;
+
+ ret = cxd2820r_wr_regs(priv, 0x10042, buf, 2);
+ 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;
+}
+
+int cxd2820r_get_frontend_c(struct dvb_frontend *fe)
+{
+ 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, 0x1001a, buf, 2);
+ if (ret)
+ goto error;
+
+ c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]);
+
+ ret = cxd2820r_rd_reg(priv, 0x10019, &buf[0]);
+ if (ret)
+ goto error;
+
+ switch ((buf[0] >> 0) & 0x07) {
+ case 0:
+ c->modulation = QAM_16;
+ break;
+ case 1:
+ c->modulation = QAM_32;
+ break;
+ case 2:
+ c->modulation = QAM_64;
+ break;
+ case 3:
+ c->modulation = QAM_128;
+ break;
+ case 4:
+ c->modulation = QAM_256;
+ break;
+ }
+
+ switch ((buf[0] >> 7) & 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;
+}
+
+int cxd2820r_read_ber_c(struct dvb_frontend *fe, u32 *ber)
+{
+ struct cxd2820r_priv *priv = fe->demodulator_priv;
+ int ret;
+ u8 buf[3], start_ber = 0;
+ *ber = 0;
+
+ if (priv->ber_running) {
+ ret = cxd2820r_rd_regs(priv, 0x10076, buf, sizeof(buf));
+ if (ret)
+ goto error;
+
+ if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
+ *ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
+ start_ber = 1;
+ }
+ } else {
+ priv->ber_running = 1;
+ start_ber = 1;
+ }
+
+ if (start_ber) {
+ /* (re)start BER */
+ ret = cxd2820r_wr_reg(priv, 0x10079, 0x01);
+ if (ret)
+ goto error;
+ }
+
+ return ret;
+error:
+ dbg("%s: failed:%d", __func__, ret);
+ return ret;
+}
+
+int cxd2820r_read_signal_strength_c(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, 0x10049, buf, sizeof(buf));
+ if (ret)
+ goto error;
+
+ tmp = (buf[0] & 0x03) << 8 | buf[1];
+ tmp = (~tmp & 0x03ff);
+
+ if (tmp == 512)
+ /* ~no signal */
+ tmp = 0;
+ else if (tmp > 350)
+ tmp = 350;
+
+ /* scale value to 0x0000-0xffff */
+ *strength = tmp * 0xffff / (350-0);
+
+ return ret;
+error:
+ dbg("%s: failed:%d", __func__, ret);
+ return ret;
+}
+
+int cxd2820r_read_snr_c(struct dvb_frontend *fe, u16 *snr)
+{
+ struct cxd2820r_priv *priv = fe->demodulator_priv;
+ int ret;
+ u8 tmp;
+ unsigned int A, B;
+ /* report SNR in dB * 10 */
+
+ ret = cxd2820r_rd_reg(priv, 0x10019, &tmp);
+ if (ret)
+ goto error;
+
+ if (((tmp >> 0) & 0x03) % 2) {
+ A = 875;
+ B = 650;
+ } else {
+ A = 950;
+ B = 760;
+ }
+
+ ret = cxd2820r_rd_reg(priv, 0x1004d, &tmp);
+ if (ret)
+ goto error;
+
+ #define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */
+ if (tmp)
+ *snr = A * (intlog2(B / tmp) >> 5) / (CXD2820R_LOG2_E_24 >> 5)
+ / 10;
+ else
+ *snr = 0;
+
+ return ret;
+error:
+ dbg("%s: failed:%d", __func__, ret);
+ return ret;
+}
+
+int cxd2820r_read_ucblocks_c(struct dvb_frontend *fe, u32 *ucblocks)
+{
+ *ucblocks = 0;
+ /* no way to read ? */
+ return 0;
+}
+
+int cxd2820r_read_status_c(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct cxd2820r_priv *priv = fe->demodulator_priv;
+ int ret;
+ u8 buf[2];
+ *status = 0;
+
+ ret = cxd2820r_rd_regs(priv, 0x10088, buf, sizeof(buf));
+ if (ret)
+ goto error;
+
+ if (((buf[0] >> 0) & 0x01) == 1) {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+ FE_HAS_VITERBI | FE_HAS_SYNC;
+
+ if (((buf[1] >> 3) & 0x01) == 1) {
+ *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
+ FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+ }
+ }
+
+ dbg("%s: lock=%02x %02x", __func__, buf[0], buf[1]);
+
+ return ret;
+error:
+ dbg("%s: failed:%d", __func__, ret);
+ return ret;
+}
+
+int cxd2820r_init_c(struct dvb_frontend *fe)
+{
+ struct cxd2820r_priv *priv = fe->demodulator_priv;
+ int ret;
+
+ ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
+ if (ret)
+ goto error;
+
+ return ret;
+error:
+ dbg("%s: failed:%d", __func__, ret);
+ return ret;
+}
+
+int cxd2820r_sleep_c(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 },
+ { 0x00081, 0x00, 0xff },
+ { 0x00080, 0x00, 0xff },
+ };
+
+ dbg("%s", __func__);
+
+ priv->delivery_system = SYS_UNDEFINED;
+
+ 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;
+ }
+
+ return ret;
+error:
+ dbg("%s: failed:%d", __func__, ret);
+ return ret;
+}
+
+int cxd2820r_get_tune_settings_c(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings *s)
+{
+ s->min_delay_ms = 500;
+ s->step_size = 0; /* no zigzag */
+ s->max_drift = 0;
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 22:18:31 +0100