1 files changed, 616 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/nxt6000.c b/drivers/media/dvb-frontends/nxt6000.c
new file mode 100644
index 000000000000..90ae6c72c0e3
--- /dev/null
+++ b/drivers/media/dvb-frontends/nxt6000.c
@@ -0,0 +1,616 @@
+/*
+        NxtWave Communications - NXT6000 demodulator driver
+
+    Copyright (C) 2002-2003 Florian Schirmer <jolt@tuxbox.org>
+    Copyright (C) 2003 Paul Andreassen <paul@andreassen.com.au>
+
+    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 <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "nxt6000_priv.h"
+#include "nxt6000.h"
+
+
+
+struct nxt6000_state {
+        struct i2c_adapter* i2c;
+        /* configuration settings */
+        const struct nxt6000_config* config;
+        struct dvb_frontend frontend;
+};
+
+static int debug;
+#define dprintk if (debug) printk
+
+static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data)
+{
+        u8 buf[] = { reg, data };
+        struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
+        int ret;
+
+        if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
+                dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret);
+
+        return (ret != 1) ? -EIO : 0;
+}
+
+static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg)
+{
+        int ret;
+        u8 b0[] = { reg };
+        u8 b1[] = { 0 };
+        struct i2c_msg msgs[] = {
+                {.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1},
+                {.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
+        };
+
+        ret = i2c_transfer(state->i2c, msgs, 2);
+
+        if (ret != 2)
+                dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret);
+
+        return b1[0];
+}
+
+static void nxt6000_reset(struct nxt6000_state* state)
+{
+        u8 val;
+
+        val = nxt6000_readreg(state, OFDM_COR_CTL);
+
+        nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT);
+        nxt6000_writereg(state, OFDM_COR_CTL, val | COREACT);
+}
+
+static int nxt6000_set_bandwidth(struct nxt6000_state *state, u32 bandwidth)
+{
+        u16 nominal_rate;
+        int result;
+
+        switch (bandwidth) {
+        case 6000000:
+                nominal_rate = 0x55B7;
+                break;
+
+        case 7000000:
+                nominal_rate = 0x6400;
+                break;
+
+        case 8000000:
+                nominal_rate = 0x7249;
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
+                return result;
+
+        return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
+}
+
+static int nxt6000_set_guard_interval(struct nxt6000_state* state, fe_guard_interval_t guard_interval)
+{
+        switch (guard_interval) {
+
+        case GUARD_INTERVAL_1_32:
+                return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
+
+        case GUARD_INTERVAL_1_16:
+                return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
+
+        case GUARD_INTERVAL_AUTO:
+        case GUARD_INTERVAL_1_8:
+                return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
+
+        case GUARD_INTERVAL_1_4:
+                return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
+
+        default:
+                return -EINVAL;
+        }
+}
+
+static int nxt6000_set_inversion(struct nxt6000_state* state, fe_spectral_inversion_t inversion)
+{
+        switch (inversion) {
+
+        case INVERSION_OFF:
+                return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00);
+
+        case INVERSION_ON:
+                return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV);
+
+        default:
+                return -EINVAL;
+
+        }
+}
+
+static int nxt6000_set_transmission_mode(struct nxt6000_state* state, fe_transmit_mode_t transmission_mode)
+{
+        int result;
+
+        switch (transmission_mode) {
+
+        case TRANSMISSION_MODE_2K:
+                if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
+                        return result;
+
+                return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
+
+        case TRANSMISSION_MODE_8K:
+        case TRANSMISSION_MODE_AUTO:
+                if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
+                        return result;
+
+                return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
+
+        default:
+                return -EINVAL;
+
+        }
+}
+
+static void nxt6000_setup(struct dvb_frontend* fe)
+{
+        struct nxt6000_state* state = fe->demodulator_priv;
+
+        nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
+        nxt6000_writereg(state, BER_CTRL, /*(1 << 2) | */ (0x01 << 1) | 0x01);
+        nxt6000_writereg(state, VIT_BERTIME_2, 0x00);  // BER Timer = 0x000200 * 256 = 131072 bits
+        nxt6000_writereg(state, VIT_BERTIME_1, 0x02);  //
+        nxt6000_writereg(state, VIT_BERTIME_0, 0x00);  //
+        nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
+        nxt6000_writereg(state, VIT_COR_CTL, 0x82);   // Enable BER measurement
+        nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC | 0x02 );
+        nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) | (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
+        nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K | 0x02);
+        nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST | INITIAL_AGC_BW);
+        nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
+        nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
+        nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) | (0x02 << 3) | 0x04);
+        nxt6000_writereg(state, CAS_FREQ, 0xBB);        /* CHECKME */
+        nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
+        nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
+        nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
+        nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
+        nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
+        nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) | (3 << 4) | 2);
+        nxt6000_writereg(state, DIAG_CONFIG, TB_SET);
+
+        if (state->config->clock_inversion)
+                nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
+        else
+                nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);
+
+        nxt6000_writereg(state, TS_FORMAT, 0);
+}
+
+static void nxt6000_dump_status(struct nxt6000_state *state)
+{
+        u8 val;
+
+/*
+        printk("RS_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, RS_COR_STAT));
+        printk("VIT_SYNC_STATUS: 0x%02X\n", nxt6000_readreg(fe, VIT_SYNC_STATUS));
+        printk("OFDM_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_COR_STAT));
+        printk("OFDM_SYR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_SYR_STAT));
+        printk("OFDM_TPS_RCVD_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
+        printk("OFDM_TPS_RCVD_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
+        printk("OFDM_TPS_RCVD_3: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
+        printk("OFDM_TPS_RCVD_4: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
+        printk("OFDM_TPS_RESERVED_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
+        printk("OFDM_TPS_RESERVED_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
+*/
+        printk("NXT6000 status:");
+
+        val = nxt6000_readreg(state, RS_COR_STAT);
+
+        printk(" DATA DESCR LOCK: %d,", val & 0x01);
+        printk(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
+
+        val = nxt6000_readreg(state, VIT_SYNC_STATUS);
+
+        printk(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
+
+        switch ((val >> 4) & 0x07) {
+
+        case 0x00:
+                printk(" VITERBI CODERATE: 1/2,");
+                break;
+
+        case 0x01:
+                printk(" VITERBI CODERATE: 2/3,");
+                break;
+
+        case 0x02:
+                printk(" VITERBI CODERATE: 3/4,");
+                break;
+
+        case 0x03:
+                printk(" VITERBI CODERATE: 5/6,");
+                break;
+
+        case 0x04:
+                printk(" VITERBI CODERATE: 7/8,");
+                break;
+
+        default:
+                printk(" VITERBI CODERATE: Reserved,");
+
+        }
+
+        val = nxt6000_readreg(state, OFDM_COR_STAT);
+
+        printk(" CHCTrack: %d,", (val >> 7) & 0x01);
+        printk(" TPSLock: %d,", (val >> 6) & 0x01);
+        printk(" SYRLock: %d,", (val >> 5) & 0x01);
+        printk(" AGCLock: %d,", (val >> 4) & 0x01);
+
+        switch (val & 0x0F) {
+
+        case 0x00:
+                printk(" CoreState: IDLE,");
+                break;
+
+        case 0x02:
+                printk(" CoreState: WAIT_AGC,");
+                break;
+
+        case 0x03:
+                printk(" CoreState: WAIT_SYR,");
+                break;
+
+        case 0x04:
+                printk(" CoreState: WAIT_PPM,");
+                break;
+
+        case 0x01:
+                printk(" CoreState: WAIT_TRL,");
+                break;
+
+        case 0x05:
+                printk(" CoreState: WAIT_TPS,");
+                break;
+
+        case 0x06:
+                printk(" CoreState: MONITOR_TPS,");
+                break;
+
+        default:
+                printk(" CoreState: Reserved,");
+
+        }
+
+        val = nxt6000_readreg(state, OFDM_SYR_STAT);
+
+        printk(" SYRLock: %d,", (val >> 4) & 0x01);
+        printk(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
+
+        switch ((val >> 4) & 0x03) {
+
+        case 0x00:
+                printk(" SYRGuard: 1/32,");
+                break;
+
+        case 0x01:
+                printk(" SYRGuard: 1/16,");
+                break;
+
+        case 0x02:
+                printk(" SYRGuard: 1/8,");
+                break;
+
+        case 0x03:
+                printk(" SYRGuard: 1/4,");
+                break;
+        }
+
+        val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
+
+        switch ((val >> 4) & 0x07) {
+
+        case 0x00:
+                printk(" TPSLP: 1/2,");
+                break;
+
+        case 0x01:
+                printk(" TPSLP: 2/3,");
+                break;
+
+        case 0x02:
+                printk(" TPSLP: 3/4,");
+                break;
+
+        case 0x03:
+                printk(" TPSLP: 5/6,");
+                break;
+
+        case 0x04:
+                printk(" TPSLP: 7/8,");
+                break;
+
+        default:
+                printk(" TPSLP: Reserved,");
+
+        }
+
+        switch (val & 0x07) {
+
+        case 0x00:
+                printk(" TPSHP: 1/2,");
+                break;
+
+        case 0x01:
+                printk(" TPSHP: 2/3,");
+                break;
+
+        case 0x02:
+                printk(" TPSHP: 3/4,");
+                break;
+
+        case 0x03:
+                printk(" TPSHP: 5/6,");
+                break;
+
+        case 0x04:
+                printk(" TPSHP: 7/8,");
+                break;
+
+        default:
+                printk(" TPSHP: Reserved,");
+
+        }
+
+        val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
+
+        printk(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
+
+        switch ((val >> 4) & 0x03) {
+
+        case 0x00:
+                printk(" TPSGuard: 1/32,");
+                break;
+
+        case 0x01:
+                printk(" TPSGuard: 1/16,");
+                break;
+
+        case 0x02:
+                printk(" TPSGuard: 1/8,");
+                break;
+
+        case 0x03:
+                printk(" TPSGuard: 1/4,");
+                break;
+
+        }
+
+        /* Strange magic required to gain access to RF_AGC_STATUS */
+        nxt6000_readreg(state, RF_AGC_VAL_1);
+        val = nxt6000_readreg(state, RF_AGC_STATUS);
+        val = nxt6000_readreg(state, RF_AGC_STATUS);
+
+        printk(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
+        printk("\n");
+}
+
+static int nxt6000_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+        u8 core_status;
+        struct nxt6000_state* state = fe->demodulator_priv;
+
+        *status = 0;
+
+        core_status = nxt6000_readreg(state, OFDM_COR_STAT);
+
+        if (core_status & AGCLOCKED)
+                *status |= FE_HAS_SIGNAL;
+
+        if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
+                *status |= FE_HAS_CARRIER;
+
+        if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
+                *status |= FE_HAS_VITERBI;
+
+        if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
+                *status |= FE_HAS_SYNC;
+
+        if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)))
+                *status |= FE_HAS_LOCK;
+
+        if (debug)
+                nxt6000_dump_status(state);
+
+        return 0;
+}
+
+static int nxt6000_init(struct dvb_frontend* fe)
+{
+        struct nxt6000_state* state = fe->demodulator_priv;
+
+        nxt6000_reset(state);
+        nxt6000_setup(fe);
+
+        return 0;
+}
+
+static int nxt6000_set_frontend(struct dvb_frontend *fe)
+{
+        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+        struct nxt6000_state* state = fe->demodulator_priv;
+        int result;
+
+        if (fe->ops.tuner_ops.set_params) {
+                fe->ops.tuner_ops.set_params(fe);
+                if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+        }
+
+        result = nxt6000_set_bandwidth(state, p->bandwidth_hz);
+        if (result < 0)
+                return result;
+
+        result = nxt6000_set_guard_interval(state, p->guard_interval);
+        if (result < 0)
+                return result;
+
+        result = nxt6000_set_transmission_mode(state, p->transmission_mode);
+        if (result < 0)
+                return result;
+
+        result = nxt6000_set_inversion(state, p->inversion);
+        if (result < 0)
+                return result;
+
+        msleep(500);
+        return 0;
+}
+
+static void nxt6000_release(struct dvb_frontend* fe)
+{
+        struct nxt6000_state* state = fe->demodulator_priv;
+        kfree(state);
+}
+
+static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+        struct nxt6000_state* state = fe->demodulator_priv;
+
+        *snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
+
+        return 0;
+}
+
+static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+        struct nxt6000_state* state = fe->demodulator_priv;
+
+        nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
+
+        *ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) |
+                nxt6000_readreg( state, VIT_BER_0 );
+
+        nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts
+
+        return 0;
+}
+
+static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
+{
+        struct nxt6000_state* state = fe->demodulator_priv;
+
+        *signal_strength = (short) (511 -
+                (nxt6000_readreg(state, AGC_GAIN_1) +
+                ((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
+
+        return 0;
+}
+
+static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
+{
+        tune->min_delay_ms = 500;
+        return 0;
+}
+
+static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+        struct nxt6000_state* state = fe->demodulator_priv;
+
+        if (enable) {
+                return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);
+        } else {
+                return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);
+        }
+}
+
+static struct dvb_frontend_ops nxt6000_ops;
+
+struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
+                                    struct i2c_adapter* i2c)
+{
+        struct nxt6000_state* state = NULL;
+
+        /* allocate memory for the internal state */
+        state = kzalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
+        if (state == NULL) goto error;
+
+        /* setup the state */
+        state->config = config;
+        state->i2c = i2c;
+
+        /* check if the demod is there */
+        if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;
+
+        /* create dvb_frontend */
+        memcpy(&state->frontend.ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+        return NULL;
+}
+
+static struct dvb_frontend_ops nxt6000_ops = {
+        .delsys = { SYS_DVBT },
+        .info = {
+                .name = "NxtWave NXT6000 DVB-T",
+                .frequency_min = 0,
+                .frequency_max = 863250000,
+                .frequency_stepsize = 62500,
+                /*.frequency_tolerance = *//* FIXME: 12% of SR */
+                .symbol_rate_min = 0,   /* FIXME */
+                .symbol_rate_max = 9360000,     /* FIXME */
+                .symbol_rate_tolerance = 4000,
+                .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+                        FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
+                        FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
+                        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,
+        },
+
+        .release = nxt6000_release,
+
+        .init = nxt6000_init,
+        .i2c_gate_ctrl = nxt6000_i2c_gate_ctrl,
+
+        .get_tune_settings = nxt6000_fe_get_tune_settings,
+
+        .set_frontend = nxt6000_set_frontend,
+
+        .read_status = nxt6000_read_status,
+        .read_ber = nxt6000_read_ber,
+        .read_signal_strength = nxt6000_read_signal_strength,
+        .read_snr = nxt6000_read_snr,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver");
+MODULE_AUTHOR("Florian Schirmer");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(nxt6000_attach);