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path: root/drivers/media/usb/dvb-usb/cinergyT2-fe.c
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Diffstat (limited to 'drivers/media/usb/dvb-usb/cinergyT2-fe.c')
-rw-r--r--drivers/media/usb/dvb-usb/cinergyT2-fe.c317
1 files changed, 317 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/cinergyT2-fe.c b/drivers/media/usb/dvb-usb/cinergyT2-fe.c
new file mode 100644
index 0000000000..efb207c23a
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/cinergyT2-fe.c
@@ -0,0 +1,317 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * TerraTec Cinergy T2/qanu USB2 DVB-T adapter.
+ *
+ * Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi)
+ *
+ * Based on the dvb-usb-framework code and the
+ * original Terratec Cinergy T2 driver by:
+ *
+ * Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and
+ * Holger Waechtler <holger@qanu.de>
+ *
+ * Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf
+ */
+
+#include "cinergyT2.h"
+
+
+/*
+ * convert linux-dvb frontend parameter set into TPS.
+ * See ETSI ETS-300744, section 4.6.2, table 9 for details.
+ *
+ * This function is probably reusable and may better get placed in a support
+ * library.
+ *
+ * We replace erroneous fields by default TPS fields (the ones with value 0).
+ */
+
+static uint16_t compute_tps(struct dtv_frontend_properties *op)
+{
+ uint16_t tps = 0;
+
+ switch (op->code_rate_HP) {
+ case FEC_2_3:
+ tps |= (1 << 7);
+ break;
+ case FEC_3_4:
+ tps |= (2 << 7);
+ break;
+ case FEC_5_6:
+ tps |= (3 << 7);
+ break;
+ case FEC_7_8:
+ tps |= (4 << 7);
+ break;
+ case FEC_1_2:
+ case FEC_AUTO:
+ default:
+ /* tps |= (0 << 7) */;
+ }
+
+ switch (op->code_rate_LP) {
+ case FEC_2_3:
+ tps |= (1 << 4);
+ break;
+ case FEC_3_4:
+ tps |= (2 << 4);
+ break;
+ case FEC_5_6:
+ tps |= (3 << 4);
+ break;
+ case FEC_7_8:
+ tps |= (4 << 4);
+ break;
+ case FEC_1_2:
+ case FEC_AUTO:
+ default:
+ /* tps |= (0 << 4) */;
+ }
+
+ switch (op->modulation) {
+ case QAM_16:
+ tps |= (1 << 13);
+ break;
+ case QAM_64:
+ tps |= (2 << 13);
+ break;
+ case QPSK:
+ default:
+ /* tps |= (0 << 13) */;
+ }
+
+ switch (op->transmission_mode) {
+ case TRANSMISSION_MODE_8K:
+ tps |= (1 << 0);
+ break;
+ case TRANSMISSION_MODE_2K:
+ default:
+ /* tps |= (0 << 0) */;
+ }
+
+ switch (op->guard_interval) {
+ case GUARD_INTERVAL_1_16:
+ tps |= (1 << 2);
+ break;
+ case GUARD_INTERVAL_1_8:
+ tps |= (2 << 2);
+ break;
+ case GUARD_INTERVAL_1_4:
+ tps |= (3 << 2);
+ break;
+ case GUARD_INTERVAL_1_32:
+ default:
+ /* tps |= (0 << 2) */;
+ }
+
+ switch (op->hierarchy) {
+ case HIERARCHY_1:
+ tps |= (1 << 10);
+ break;
+ case HIERARCHY_2:
+ tps |= (2 << 10);
+ break;
+ case HIERARCHY_4:
+ tps |= (3 << 10);
+ break;
+ case HIERARCHY_NONE:
+ default:
+ /* tps |= (0 << 10) */;
+ }
+
+ return tps;
+}
+
+struct cinergyt2_fe_state {
+ struct dvb_frontend fe;
+ struct dvb_usb_device *d;
+
+ unsigned char data[64];
+ struct mutex data_mutex;
+
+ struct dvbt_get_status_msg status;
+};
+
+static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
+ enum fe_status *status)
+{
+ struct cinergyt2_fe_state *state = fe->demodulator_priv;
+ int ret;
+
+ mutex_lock(&state->data_mutex);
+ state->data[0] = CINERGYT2_EP1_GET_TUNER_STATUS;
+
+ ret = dvb_usb_generic_rw(state->d, state->data, 1,
+ state->data, sizeof(state->status), 0);
+ if (!ret)
+ memcpy(&state->status, state->data, sizeof(state->status));
+ mutex_unlock(&state->data_mutex);
+
+ if (ret < 0)
+ return ret;
+
+ *status = 0;
+
+ if (0xffff - le16_to_cpu(state->status.gain) > 30)
+ *status |= FE_HAS_SIGNAL;
+ if (state->status.lock_bits & (1 << 6))
+ *status |= FE_HAS_LOCK;
+ if (state->status.lock_bits & (1 << 5))
+ *status |= FE_HAS_SYNC;
+ if (state->status.lock_bits & (1 << 4))
+ *status |= FE_HAS_CARRIER;
+ if (state->status.lock_bits & (1 << 1))
+ *status |= FE_HAS_VITERBI;
+
+ if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
+ (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
+ *status &= ~FE_HAS_LOCK;
+
+ return 0;
+}
+
+static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ struct cinergyt2_fe_state *state = fe->demodulator_priv;
+
+ *ber = le32_to_cpu(state->status.viterbi_error_rate);
+ return 0;
+}
+
+static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
+{
+ struct cinergyt2_fe_state *state = fe->demodulator_priv;
+
+ *unc = le32_to_cpu(state->status.uncorrected_block_count);
+ return 0;
+}
+
+static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
+ u16 *strength)
+{
+ struct cinergyt2_fe_state *state = fe->demodulator_priv;
+
+ *strength = (0xffff - le16_to_cpu(state->status.gain));
+ return 0;
+}
+
+static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ struct cinergyt2_fe_state *state = fe->demodulator_priv;
+
+ *snr = (state->status.snr << 8) | state->status.snr;
+ return 0;
+}
+
+static int cinergyt2_fe_init(struct dvb_frontend *fe)
+{
+ return 0;
+}
+
+static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
+{
+ deb_info("cinergyt2_fe_sleep() Called\n");
+ return 0;
+}
+
+static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings *tune)
+{
+ tune->min_delay_ms = 800;
+ return 0;
+}
+
+static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
+ struct cinergyt2_fe_state *state = fe->demodulator_priv;
+ struct dvbt_set_parameters_msg *param;
+ int err;
+
+ mutex_lock(&state->data_mutex);
+
+ param = (void *)state->data;
+ param->cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
+ param->tps = cpu_to_le16(compute_tps(fep));
+ param->freq = cpu_to_le32(fep->frequency / 1000);
+ param->flags = 0;
+
+ switch (fep->bandwidth_hz) {
+ default:
+ case 8000000:
+ param->bandwidth = 8;
+ break;
+ case 7000000:
+ param->bandwidth = 7;
+ break;
+ case 6000000:
+ param->bandwidth = 6;
+ break;
+ }
+
+ err = dvb_usb_generic_rw(state->d, state->data, sizeof(*param),
+ state->data, 2, 0);
+ if (err < 0)
+ err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);
+
+ mutex_unlock(&state->data_mutex);
+ return (err < 0) ? err : 0;
+}
+
+static void cinergyt2_fe_release(struct dvb_frontend *fe)
+{
+ struct cinergyt2_fe_state *state = fe->demodulator_priv;
+ kfree(state);
+}
+
+static const struct dvb_frontend_ops cinergyt2_fe_ops;
+
+struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
+{
+ struct cinergyt2_fe_state *s = kzalloc(sizeof(
+ struct cinergyt2_fe_state), GFP_KERNEL);
+ if (s == NULL)
+ return NULL;
+
+ s->d = d;
+ memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
+ s->fe.demodulator_priv = s;
+ mutex_init(&s->data_mutex);
+ return &s->fe;
+}
+
+
+static const struct dvb_frontend_ops cinergyt2_fe_ops = {
+ .delsys = { SYS_DVBT },
+ .info = {
+ .name = DRIVER_NAME,
+ .frequency_min_hz = 174 * MHz,
+ .frequency_max_hz = 862 * MHz,
+ .frequency_stepsize_hz = 166667,
+ .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2
+ | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4
+ | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8
+ | FE_CAN_FEC_AUTO | FE_CAN_QPSK
+ | FE_CAN_QAM_16 | FE_CAN_QAM_64
+ | FE_CAN_QAM_AUTO
+ | FE_CAN_TRANSMISSION_MODE_AUTO
+ | FE_CAN_GUARD_INTERVAL_AUTO
+ | FE_CAN_HIERARCHY_AUTO
+ | FE_CAN_RECOVER
+ | FE_CAN_MUTE_TS
+ },
+
+ .release = cinergyt2_fe_release,
+
+ .init = cinergyt2_fe_init,
+ .sleep = cinergyt2_fe_sleep,
+
+ .set_frontend = cinergyt2_fe_set_frontend,
+ .get_tune_settings = cinergyt2_fe_get_tune_settings,
+
+ .read_status = cinergyt2_fe_read_status,
+ .read_ber = cinergyt2_fe_read_ber,
+ .read_signal_strength = cinergyt2_fe_read_signal_strength,
+ .read_snr = cinergyt2_fe_read_snr,
+ .read_ucblocks = cinergyt2_fe_read_unc_blocks,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 08:08:41 +0000