V4L/DVB (8986): cx24116: Adding DVB-S2 demodulator support

Adds support for the COnexant cx24116 DVB-S2 demodulator.

TODO: checkpatch cleanup.

Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 1008 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/Kconfig b/drivers/media/dvb/frontends/Kconfig
index 097d9f00144f..d2f31da26cbc 100644
--- a/drivers/media/dvb/frontends/Kconfig
+++ b/drivers/media/dvb/frontends/Kconfig
@@ -92,6 +92,13 @@ config DVB_TUA6100
         help
           A DVB-S PLL chip.
 
+config DVB_CX24116
+        tristate "Conexant CX24116 based"
+        depends on DVB_CORE && I2C
+        default m if DVB_FE_CUSTOMISE
+        help
+          A DVB-S/S2 tuner module. Say Y when you want to support this frontend.
+
 comment "DVB-T (terrestrial) frontends"
         depends on DVB_CORE
 
diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile
index 1b5478886240..5deb8a542abd 100644
--- a/drivers/media/dvb/frontends/Makefile
+++ b/drivers/media/dvb/frontends/Makefile
@@ -51,3 +51,4 @@ obj-$(CONFIG_DVB_S5H1411) += s5h1411.o
 obj-$(CONFIG_DVB_LGS8GL5) += lgs8gl5.o
 obj-$(CONFIG_DVB_DUMMY_FE) += dvb_dummy_fe.o
 obj-$(CONFIG_DVB_AF9013) += af9013.o
+obj-$(CONFIG_DVB_CX24116) += cx24116.o
diff --git a/drivers/media/dvb/frontends/cx24116.c b/drivers/media/dvb/frontends/cx24116.c
new file mode 100644
index 000000000000..1402086a5c44
--- /dev/null
+++ b/drivers/media/dvb/frontends/cx24116.c
@@ -0,0 +1,950 @@
+/*
+    Conexant cx24116/cx24118 - DVBS/S2 Satellite demod/tuner driver
+
+    Copyright (C) 2006-2008 Steven Toth <stoth@hauppauge.com>
+
+    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.
+*/
+
+/*
+ * Updates by Darron Broad 2007.
+ *
+ * March
+ *      Fixed some bugs.
+ *      Added diseqc support.
+ *      Added corrected signal strength support.
+ *
+ * August
+ *      Sync with legacy version.
+ *      Some clean ups.
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/firmware.h>
+
+#include "dvb_frontend.h"
+#include "cx24116.h"
+
+/*
+ * Fetch firmware in the following manner.
+ *
+ * #!/bin/sh
+ * wget ftp://167.206.143.11/outgoing/Oxford/88x_2_117_24275_1_INF.zip
+ * unzip 88x_2_117_24275_1_INF.zip
+ * dd if=Driver88/hcw88bda.sys of=dvb-fe-cx24116.fw skip=81768 bs=1 count=32522
+ */
+#define CX24116_DEFAULT_FIRMWARE "dvb-fe-cx24116.fw"
+#define CX24116_SEARCH_RANGE_KHZ 5000
+
+/* registers (TO BE COMPLETED) */
+#define CX24116_REG_SIGNAL (0xd5)
+
+/* arg buffer size */
+#define CX24116_ARGLEN (0x1e)
+
+/* arg offset for DiSEqC */
+#define CX24116_DISEQC_BURST  (1)
+#define CX24116_DISEQC_ARG2_2 (2)   /* unknown value=2 */
+#define CX24116_DISEQC_ARG3_0 (3)   /* unknown value=0 */
+#define CX24116_DISEQC_ARG4_0 (4)   /* unknown value=0 */
+#define CX24116_DISEQC_MSGLEN (5)
+#define CX24116_DISEQC_MSGOFS (6)
+
+/* DiSEqC burst */
+#define CX24116_DISEQC_MINI_A (0)
+#define CX24116_DISEQC_MINI_B (1)
+
+static int debug = 0;
+#define dprintk(args...) \
+        do { \
+                if (debug) printk ("cx24116: " args); \
+        } while (0)
+
+enum cmds
+{
+        CMD_INIT_CMD10  = 0x10,
+        CMD_TUNEREQUEST = 0x11,
+        CMD_INIT_CMD13  = 0x13,
+        CMD_INIT_CMD14  = 0x14,
+        CMD_SEND_DISEQC = 0x21,
+        CMD_SET_TONEPRE = 0x22,
+        CMD_SET_TONE    = 0x23,
+};
+
+/* The Demod/Tuner can't easily provide these, we cache them */
+struct cx24116_tuning
+{
+        u32 frequency;
+        u32 symbol_rate;
+        fe_spectral_inversion_t inversion;
+        fe_code_rate_t fec;
+
+        fe_modulation_t modulation;
+
+        /* Demod values */
+        u8 fec_val;
+        u8 fec_mask;
+        u8 inversion_val;
+};
+
+/* Basic commands that are sent to the firmware */
+struct cx24116_cmd
+{
+        u8 len;
+        u8 args[CX24116_ARGLEN];
+};
+
+struct cx24116_state
+{
+        struct i2c_adapter* i2c;
+        const struct cx24116_config* config;
+
+        struct dvb_frontend frontend;
+
+        struct cx24116_tuning dcur;
+        struct cx24116_tuning dnxt;
+
+        u8 skip_fw_load;
+        u8 burst;
+};
+
+static int cx24116_writereg(struct cx24116_state* state, int reg, int data)
+{
+        u8 buf[] = { reg, data };
+        struct i2c_msg msg = { .addr = state->config->demod_address,
+                .flags = 0, .buf = buf, .len = 2 };
+        int err;
+
+        if (debug>1)
+                printk("cx24116: %s: write reg 0x%02x, value 0x%02x\n",
+                                                __func__,reg, data);
+
+        if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
+                printk("%s: writereg error(err == %i, reg == 0x%02x,"
+                         " value == 0x%02x)\n", __func__, err, reg, data);
+                return -EREMOTEIO;
+        }
+
+        return 0;
+}
+
+/* Bulk byte writes to a single I2C address, for 32k firmware load */
+static int cx24116_writeregN(struct cx24116_state* state, int reg, u8 *data, u16 len)
+{
+        int ret = -EREMOTEIO;
+        struct i2c_msg msg;
+        u8 *buf;
+
+        buf = kmalloc(len + 1, GFP_KERNEL);
+        if (buf == NULL) {
+                printk("Unable to kmalloc\n");
+                ret = -ENOMEM;
+                goto error;
+        }
+
+        *(buf) = reg;
+        memcpy(buf + 1, data, len);
+
+        msg.addr = state->config->demod_address;
+        msg.flags = 0;
+        msg.buf = buf;
+        msg.len = len + 1;
+
+        if (debug>1)
+                printk("cx24116: %s:  write regN 0x%02x, len = %d\n",
+                                                __func__,reg, len);
+
+        if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1) {
+                printk("%s: writereg error(err == %i, reg == 0x%02x\n",
+                         __func__, ret, reg);
+                ret = -EREMOTEIO;
+        }
+
+error:
+        kfree(buf);
+
+        return ret;
+}
+
+static int cx24116_readreg(struct cx24116_state* state, u8 reg)
+{
+        int ret;
+        u8 b0[] = { reg };
+        u8 b1[] = { 0 };
+        struct i2c_msg msg[] = {
+                { .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, msg, 2);
+
+        if (ret != 2) {
+                printk("%s: reg=0x%x (error=%d)\n", __func__, reg, ret);
+                return ret;
+        }
+
+        if (debug>1)
+                printk("cx24116: read reg 0x%02x, value 0x%02x\n",reg, b1[0]);
+
+        return b1[0];
+}
+
+static int cx24116_set_inversion(struct cx24116_state* state, fe_spectral_inversion_t inversion)
+{
+        dprintk("%s(%d)\n", __func__, inversion);
+
+        switch (inversion) {
+        case INVERSION_OFF:
+                state->dnxt.inversion_val = 0x00;
+                break;
+        case INVERSION_ON:
+                state->dnxt.inversion_val = 0x04;
+                break;
+        case INVERSION_AUTO:
+                state->dnxt.inversion_val = 0x0C;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        state->dnxt.inversion = inversion;
+
+        return 0;
+}
+
+/* A table of modulation, fec and configuration bytes for the demod.
+ * Not all S2 mmodulation schemes are support and not all rates with
+ * a scheme are support. Especially, no auto detect when in S2 mode.
+ */
+struct cx24116_modfec {
+        fe_modulation_t modulation;
+        fe_code_rate_t fec;
+        u8 mask;        /* In DVBS mode this is used to autodetect */
+        u8 val;         /* Passed to the firmware to indicate mode selection */
+} CX24116_MODFEC_MODES[] = {
+ /* QPSK. For unknown rates we set hardware to auto detect 0xfe 0x30 */
+ { QPSK, FEC_NONE, 0xfe, 0x30 },
+ { QPSK, FEC_1_2,  0x02, 0x2e },
+ { QPSK, FEC_2_3,  0x04, 0x2f },
+ { QPSK, FEC_3_4,  0x08, 0x30 },
+ { QPSK, FEC_4_5,  0xfe, 0x30 },
+ { QPSK, FEC_5_6,  0x20, 0x31 },
+ { QPSK, FEC_6_7,  0xfe, 0x30 },
+ { QPSK, FEC_7_8,  0x80, 0x32 },
+ { QPSK, FEC_8_9,  0xfe, 0x30 },
+ { QPSK, FEC_AUTO, 0xfe, 0x30 },
+ /* NBC-QPSK */
+ { NBC_QPSK, FEC_1_2,  0x00, 0x04 },
+ { NBC_QPSK, FEC_3_5,  0x00, 0x05 },
+ { NBC_QPSK, FEC_2_3,  0x00, 0x06 },
+ { NBC_QPSK, FEC_3_4,  0x00, 0x07 },
+ { NBC_QPSK, FEC_4_5,  0x00, 0x08 },
+ { NBC_QPSK, FEC_5_6,  0x00, 0x09 },
+ { NBC_QPSK, FEC_8_9,  0x00, 0x0a },
+ { NBC_QPSK, FEC_9_10, 0x00, 0x0b },
+ /* 8PSK */
+ { _8PSK, FEC_3_5,  0x00, 0x0c },
+ { _8PSK, FEC_2_3,  0x00, 0x0d },
+ { _8PSK, FEC_3_4,  0x00, 0x0e },
+ { _8PSK, FEC_5_6,  0x00, 0x0f },
+ { _8PSK, FEC_9_10, 0x00, 0x11 },
+};
+
+static int cx24116_lookup_fecmod(struct cx24116_state* state,
+        fe_modulation_t m, fe_code_rate_t f)
+{
+        int i, ret = -EOPNOTSUPP;
+
+        for(i=0 ; i < sizeof(CX24116_MODFEC_MODES) / sizeof(struct cx24116_modfec) ; i++)
+        {
+                if( (m == CX24116_MODFEC_MODES[i].modulation) &&
+                        (f == CX24116_MODFEC_MODES[i].fec) )
+                        {
+                                ret = i;
+                                break;
+                        }
+        }
+
+        return ret;
+}
+
+static int cx24116_set_fec(struct cx24116_state* state, fe_modulation_t mod, fe_code_rate_t fec)
+{
+        int ret = 0;
+        dprintk("%s()\n", __func__);
+
+        ret = cx24116_lookup_fecmod(state, mod, fec);
+
+        if(ret < 0)
+                return ret;
+
+        state->dnxt.fec_val = CX24116_MODFEC_MODES[ret].val;
+        state->dnxt.fec_mask = CX24116_MODFEC_MODES[ret].mask;
+        dprintk("%s() fec_val/mask = 0x%02x/0x%02x\n", __func__,
+                state->dnxt.fec_val, state->dnxt.fec_mask);
+
+        return 0;
+}
+
+static int cx24116_set_symbolrate(struct cx24116_state* state, u32 rate)
+{
+        int ret = 0;
+
+        dprintk("%s()\n", __func__);
+
+        state->dnxt.symbol_rate = rate;
+
+        dprintk("%s() symbol_rate = %d\n", __func__, state->dnxt.symbol_rate);
+
+        /*  check if symbol rate is within limits */
+        if ((state->dnxt.symbol_rate > state->frontend.ops.info.symbol_rate_max) ||
+            (state->dnxt.symbol_rate < state->frontend.ops.info.symbol_rate_min))
+                ret = -EOPNOTSUPP;
+
+        return ret;
+}
+
+static int cx24116_load_firmware (struct dvb_frontend* fe, const struct firmware *fw);
+
+static int cx24116_firmware_ondemand(struct dvb_frontend* fe)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        const struct firmware *fw;
+        int ret = 0;
+
+        dprintk("%s()\n",__func__);
+
+        if (cx24116_readreg(state, 0x20) > 0)
+        {
+
+                if (state->skip_fw_load)
+                        return 0;
+
+                /* Load firmware */
+                /* request the firmware, this will block until someone uploads it */
+                printk("%s: Waiting for firmware upload (%s)...\n", __func__, CX24116_DEFAULT_FIRMWARE);
+                ret = request_firmware(&fw, CX24116_DEFAULT_FIRMWARE, &state->i2c->dev);
+                printk("%s: Waiting for firmware upload(2)...\n", __func__);
+                if (ret) {
+                        printk("%s: No firmware uploaded (timeout or file not found?)\n", __func__);
+                        return ret;
+                }
+
+                /* Make sure we don't recurse back through here during loading */
+                state->skip_fw_load = 1;
+
+                ret = cx24116_load_firmware(fe, fw);
+                if (ret)
+                        printk("%s: Writing firmware to device failed\n", __func__);
+
+                release_firmware(fw);
+
+                printk("%s: Firmware upload %s\n", __func__, ret == 0 ? "complete" : "failed");
+
+                /* Ensure firmware is always loaded if required */
+                state->skip_fw_load = 0;
+        }
+
+        return ret;
+}
+
+/* Take a basic firmware command structure, format it and forward it for processing */
+static int cx24116_cmd_execute(struct dvb_frontend* fe, struct cx24116_cmd *cmd)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        int i, ret;
+
+        dprintk("%s()\n", __func__);
+
+        /* Load the firmware if required */
+        if ( (ret = cx24116_firmware_ondemand(fe)) != 0)
+        {
+                printk("%s(): Unable initialise the firmware\n", __func__);
+                return ret;
+        }
+
+        /* Write the command */
+        for(i = 0; i < cmd->len ; i++)
+        {
+                dprintk("%s: 0x%02x == 0x%02x\n", __func__, i, cmd->args[i]);
+                cx24116_writereg(state, i, cmd->args[i]);
+        }
+
+        /* Start execution and wait for cmd to terminate */
+        cx24116_writereg(state, 0x1f, 0x01);
+        while( cx24116_readreg(state, 0x1f) )
+        {
+                msleep(10);
+                if(i++ > 64)
+                {
+                        /* Avoid looping forever if the firmware does no respond */
+                        printk("%s() Firmware not responding\n", __func__);
+                        return -EREMOTEIO;
+                }
+        }
+        return 0;
+}
+
+static int cx24116_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
+{
+        struct cx24116_state* state = fe->demodulator_priv;
+        struct cx24116_cmd cmd;
+        int ret;
+
+        dprintk("%s\n", __func__);
+        dprintk("Firmware is %zu bytes (%02x %02x .. %02x %02x)\n"
+                        ,fw->size
+                        ,fw->data[0]
+                        ,fw->data[1]
+                        ,fw->data[ fw->size-2 ]
+                        ,fw->data[ fw->size-1 ]
+                        );
+
+        /* Toggle 88x SRST pin to reset demod */
+        if (state->config->reset_device)
+                state->config->reset_device(fe);
+
+        /* Begin the firmware load process */
+        /* Prepare the demod, load the firmware, cleanup after load */
+        cx24116_writereg(state, 0xF1, 0x08);
+        cx24116_writereg(state, 0xF2, cx24116_readreg(state, 0xF2) | 0x03);
+        cx24116_writereg(state, 0xF3, 0x46);
+        cx24116_writereg(state, 0xF9, 0x00);
+
+        cx24116_writereg(state, 0xF0, 0x03);
+        cx24116_writereg(state, 0xF4, 0x81);
+        cx24116_writereg(state, 0xF5, 0x00);
+        cx24116_writereg(state, 0xF6, 0x00);
+
+        /* write the entire firmware as one transaction */
+        cx24116_writeregN(state, 0xF7, fw->data, fw->size);
+
+        cx24116_writereg(state, 0xF4, 0x10);
+        cx24116_writereg(state, 0xF0, 0x00);
+        cx24116_writereg(state, 0xF8, 0x06);
+
+        /* Firmware CMD 10: Chip config? */
+        cmd.args[0x00] = CMD_INIT_CMD10;
+        cmd.args[0x01] = 0x05;
+        cmd.args[0x02] = 0xdc;
+        cmd.args[0x03] = 0xda;
+        cmd.args[0x04] = 0xae;
+        cmd.args[0x05] = 0xaa;
+        cmd.args[0x06] = 0x04;
+        cmd.args[0x07] = 0x9d;
+        cmd.args[0x08] = 0xfc;
+        cmd.args[0x09] = 0x06;
+        cmd.len= 0x0a;
+        ret = cx24116_cmd_execute(fe, &cmd);
+        if (ret != 0)
+                return ret;
+
+        cx24116_writereg(state, 0x9d, 0x00);
+
+        /* Firmware CMD 14: Unknown */
+        cmd.args[0x00] = CMD_INIT_CMD14;
+        cmd.args[0x01] = 0x00;
+        cmd.args[0x02] = 0x00;
+        cmd.len= 0x03;
+        ret = cx24116_cmd_execute(fe, &cmd);
+        if (ret != 0)
+                return ret;
+
+        cx24116_writereg(state, 0xe5, 0x00);
+
+        /* Firmware CMD 13: Unknown - Firmware config? */
+        cmd.args[0x00] = CMD_INIT_CMD13;
+        cmd.args[0x01] = 0x01;
+        cmd.args[0x02] = 0x75;
+        cmd.args[0x03] = 0x00;
+        cmd.args[0x04] = 0x02;
+        cmd.args[0x05] = 0x00;
+        cmd.len= 0x06;
+        ret = cx24116_cmd_execute(fe, &cmd);
+        if (ret != 0)
+                return ret;
+
+        return 0;
+}
+
+static int cx24116_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
+{
+        /* The isl6421 module will override this function in the fops. */
+        dprintk("%s() This should never appear if the isl6421 module is loaded correctly\n",__func__);
+
+        return -EOPNOTSUPP;
+}
+
+static int cx24116_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+
+        int lock = cx24116_readreg(state, 0x9d);
+
+        dprintk("%s: status = 0x%02x\n", __func__, lock);
+
+        *status = 0;
+
+        if (lock & 0x01)
+                *status |= FE_HAS_SIGNAL;
+        if (lock & 0x02)
+                *status |= FE_HAS_CARRIER;
+        if (lock & 0x04)
+                *status |= FE_HAS_VITERBI;
+        if (lock & 0x08)
+                *status |= FE_HAS_SYNC | FE_HAS_LOCK;
+
+        return 0;
+}
+
+/* TODO: Not clear how we do this */
+static int cx24116_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+        //struct cx24116_state *state = fe->demodulator_priv;
+        dprintk("%s()\n", __func__);
+        *ber = 0;
+
+        return 0;
+}
+
+/* Signal strength (0..100)% = (sig & 0xf0) * 10 + (sig & 0x0f) * 10 / 16 */
+static int cx24116_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        u8 strength_reg;
+        static const u32 strength_tab[] = { /* 10 x Table (rounded up) */
+                0x00000,0x0199A,0x03333,0x04ccD,0x06667,0x08000,0x0999A,0x0b333,0x0cccD,0x0e667,
+                0x10000,0x1199A,0x13333,0x14ccD,0x16667,0x18000 };
+
+        dprintk("%s()\n", __func__);
+
+        strength_reg = cx24116_readreg(state, CX24116_REG_SIGNAL);
+
+        if(strength_reg < 0xa0)
+                *signal_strength = strength_tab [ ( strength_reg & 0xf0 )   >> 4 ] +
+                                ( strength_tab [ ( strength_reg & 0x0f ) ] >> 4 );
+        else
+                *signal_strength = 0xffff;
+
+        dprintk("%s: Signal strength (raw / cooked) = (0x%02x / 0x%04x)\n",
+                __func__,strength_reg,*signal_strength);
+
+        return 0;
+}
+
+/* TODO: Not clear how we do this */
+static int cx24116_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+        //struct cx24116_state *state = fe->demodulator_priv;
+        dprintk("%s()\n", __func__);
+        *snr = 0;
+
+        return 0;
+}
+
+/* TODO: Not clear how we do this */
+static int cx24116_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+        //struct cx24116_state *state = fe->demodulator_priv;
+        dprintk("%s()\n", __func__);
+        *ucblocks = 0;
+
+        return 0;
+}
+
+/* Overwrite the current tuning params, we are about to tune */
+static void cx24116_clone_params(struct dvb_frontend* fe)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        memcpy(&state->dcur, &state->dnxt, sizeof(state->dcur));
+}
+
+static int cx24116_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
+{
+        struct cx24116_cmd cmd;
+        int ret;
+
+        dprintk("%s(%d)\n", __func__, tone);
+        if ( (tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF) ) {
+                printk("%s: Invalid, tone=%d\n", __func__, tone);
+                return -EINVAL;
+        }
+
+        /* This is always done before the tone is set */
+        cmd.args[0x00] = CMD_SET_TONEPRE;
+        cmd.args[0x01] = 0x00;
+        cmd.len= 0x02;
+        ret = cx24116_cmd_execute(fe, &cmd);
+        if (ret != 0)
+                return ret;
+
+        /* Now we set the tone */
+        cmd.args[0x00] = CMD_SET_TONE;
+        cmd.args[0x01] = 0x00;
+        cmd.args[0x02] = 0x00;
+
+        switch (tone) {
+        case SEC_TONE_ON:
+                dprintk("%s: setting tone on\n", __func__);
+                cmd.args[0x03] = 0x01;
+                break;
+        case SEC_TONE_OFF:
+                dprintk("%s: setting tone off\n",__func__);
+                cmd.args[0x03] = 0x00;
+                break;
+        }
+        cmd.len= 0x04;
+
+        return cx24116_cmd_execute(fe, &cmd);
+}
+
+/* Initialise DiSEqC */
+static int cx24116_diseqc_init(struct dvb_frontend* fe)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+
+        /* Default DiSEqC burst state */
+        state->burst = CX24116_DISEQC_MINI_A;
+
+        return 0;
+}
+
+/* Send DiSEqC message with derived burst (hack) || previous burst */
+static int cx24116_send_diseqc_msg(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *d)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        struct cx24116_cmd cmd;
+        int i, ret;
+
+        /* Dump DiSEqC message */
+        if (debug) {
+                printk("cx24116: %s(", __func__);
+                for(i = 0 ; i < d->msg_len ;) {
+                        printk("0x%02x", d->msg[i]);
+                        if(++i < d->msg_len)
+                                printk(", ");
+                }
+                printk(")\n");
+        }
+
+        if(d->msg_len > (CX24116_ARGLEN - CX24116_DISEQC_MSGOFS))
+                return -EINVAL;
+
+        cmd.args[0x00] = CMD_SEND_DISEQC;
+        cmd.args[CX24116_DISEQC_ARG2_2] = 0x02;
+        cmd.args[CX24116_DISEQC_ARG3_0] = 0x00;
+        cmd.args[CX24116_DISEQC_ARG4_0] = 0x00;
+
+        /* DiSEqC message */
+        for (i = 0; i < d->msg_len; i++)
+                cmd.args[CX24116_DISEQC_MSGOFS + i] = d->msg[i];
+
+        /* Hack: Derive burst from command else use previous burst */
+        if(d->msg_len >= 4 && d->msg[2] == 0x38)
+                cmd.args[CX24116_DISEQC_BURST] = (d->msg[3] >> 2) & 1;
+        else
+                cmd.args[CX24116_DISEQC_BURST] = state->burst;
+
+        cmd.args[CX24116_DISEQC_MSGLEN] = d->msg_len;
+        cmd.len = CX24116_DISEQC_MSGOFS + d->msg_len;
+
+        ret = cx24116_cmd_execute(fe, &cmd);
+
+        /* Firmware command duration is unknown, so guess...
+         *
+         * Eutelsat spec:
+         * >15ms delay          +
+         *  13.5ms per byte     +
+         * >15ms delay          +
+         *  12.5ms burst        +
+         * >15ms delay
+         */
+        if(ret == 0)
+                msleep( (cmd.args[CX24116_DISEQC_MSGLEN] << 4) + 60 );
+
+        return ret;
+}
+
+/* Send DiSEqC burst */
+static int cx24116_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        struct cx24116_cmd cmd;
+        int ret;
+
+        dprintk("%s(%d)\n",__func__,(int)burst);
+
+        cmd.args[0x00] = CMD_SEND_DISEQC;
+        cmd.args[CX24116_DISEQC_ARG2_2] = 0x02;
+        cmd.args[CX24116_DISEQC_ARG3_0] = 0x00;
+        cmd.args[CX24116_DISEQC_ARG4_0] = 0x00;
+
+        if (burst == SEC_MINI_A)
+                cmd.args[CX24116_DISEQC_BURST] = CX24116_DISEQC_MINI_A;
+        else if(burst == SEC_MINI_B)
+                cmd.args[CX24116_DISEQC_BURST] = CX24116_DISEQC_MINI_B;
+        else
+                return -EINVAL;
+
+        /* Cache as previous burst state */
+        state->burst= cmd.args[CX24116_DISEQC_BURST];
+
+        cmd.args[CX24116_DISEQC_MSGLEN] = 0x00;
+        cmd.len= CX24116_DISEQC_MSGOFS;
+
+        ret= cx24116_cmd_execute(fe, &cmd);
+
+        /* Firmware command duration is unknown, so guess... */
+        if(ret == 0)
+                msleep(60);
+
+        return ret;
+}
+
+static void cx24116_release(struct dvb_frontend* fe)
+{
+        struct cx24116_state* state = fe->demodulator_priv;
+        dprintk("%s\n",__func__);
+        kfree(state);
+}
+
+static struct dvb_frontend_ops cx24116_ops;
+
+struct dvb_frontend* cx24116_attach(const struct cx24116_config* config,
+                                    struct i2c_adapter* i2c)
+{
+        struct cx24116_state* state = NULL;
+        int ret;
+
+        dprintk("%s\n",__func__);
+
+        /* allocate memory for the internal state */
+        state = kmalloc(sizeof(struct cx24116_state), GFP_KERNEL);
+        if (state == NULL) {
+                printk("Unable to kmalloc\n");
+                goto error;
+        }
+
+        /* setup the state */
+        memset(state, 0, sizeof(struct cx24116_state));
+
+        state->config = config;
+        state->i2c = i2c;
+
+        /* check if the demod is present */
+        ret = (cx24116_readreg(state, 0xFF) << 8) | cx24116_readreg(state, 0xFE);
+        if (ret != 0x0501) {
+                printk("Invalid probe, probably not a CX24116 device\n");
+                goto error;
+        }
+
+        /* create dvb_frontend */
+        memcpy(&state->frontend.ops, &cx24116_ops, sizeof(struct dvb_frontend_ops));
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+
+        return NULL;
+}
+
+static int cx24116_get_params(struct dvb_frontend* fe)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        struct tv_frontend_properties *cache = &fe->tv_property_cache;
+
+        dprintk("%s()\n",__func__);
+
+        cache->frequency = state->dcur.frequency;
+        cache->inversion = state->dcur.inversion;
+        cache->modulation = state->dcur.modulation;
+        cache->fec_inner = state->dcur.fec;
+        cache->symbol_rate = state->dcur.symbol_rate;
+
+        return 0;
+}
+
+static int cx24116_initfe(struct dvb_frontend* fe)
+{
+        dprintk("%s()\n",__func__);
+
+        return cx24116_diseqc_init(fe);
+}
+
+static int cx24116_set_property(struct dvb_frontend *fe, tv_property_t* tvp)
+{
+        dprintk("%s(..)\n", __func__);
+        return 0;
+}
+
+static int cx24116_set_params(struct dvb_frontend *fe)
+{
+        dprintk("%s(..) We were notified that a tune request may occur\n", __func__);
+        return 0;
+}
+
+/* dvb-core told us to tune, the tv property cache will be complete,
+ * it's safe for is to pull values and use them for tuning purposes.
+ */
+static int cx24116_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
+{
+        struct cx24116_state *state = fe->demodulator_priv;
+        struct tv_frontend_properties *c = &fe->tv_property_cache;
+        struct cx24116_cmd cmd;
+        fe_status_t tunerstat;
+        int ret;
+        u8 retune=4;
+
+        dprintk("%s()\n",__func__);
+
+        state->dnxt.modulation = c->modulation;
+        state->dnxt.frequency = c->frequency;
+
+        if ((ret = cx24116_set_inversion(state, c->inversion)) !=  0)
+                return ret;
+
+        if ((ret = cx24116_set_fec(state, c->modulation, c->fec_inner)) !=  0)
+                return ret;
+
+        if ((ret = cx24116_set_symbolrate(state, c->symbol_rate)) !=  0)
+                return ret;
+
+        /* discard the 'current' tuning parameters and prepare to tune */
+        cx24116_clone_params(fe);
+
+        dprintk("%s:   frequency   = %d\n", __func__, state->dcur.frequency);
+        dprintk("%s:   symbol_rate = %d\n", __func__, state->dcur.symbol_rate);
+        dprintk("%s:   FEC         = %d (mask/val = 0x%02x/0x%02x)\n", __func__,
+                state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val);
+        dprintk("%s:   Inversion   = %d (val = 0x%02x)\n", __func__,
+                state->dcur.inversion, state->dcur.inversion_val);
+
+        if (state->config->set_ts_params)
+                state->config->set_ts_params(fe, 0);
+
+        /* Prepare a tune request */
+        cmd.args[0x00] = CMD_TUNEREQUEST;
+
+        /* Frequency */
+        cmd.args[0x01] = (state->dcur.frequency & 0xff0000) >> 16;
+        cmd.args[0x02] = (state->dcur.frequency & 0x00ff00) >> 8;
+        cmd.args[0x03] = (state->dcur.frequency & 0x0000ff);
+
+        /* Symbol Rate */
+        cmd.args[0x04] = ((state->dcur.symbol_rate / 1000) & 0xff00) >> 8;
+        cmd.args[0x05] = ((state->dcur.symbol_rate / 1000) & 0x00ff);
+
+        /* Automatic Inversion */
+        cmd.args[0x06] = state->dcur.inversion_val;
+
+        /* Modulation / FEC & Pilot Off */
+        cmd.args[0x07] = state->dcur.fec_val;
+
+        if (c->pilot == PILOT_ON)
+                cmd.args[0x07] |= 0x40;
+
+        cmd.args[0x08] = CX24116_SEARCH_RANGE_KHZ >> 8;
+        cmd.args[0x09] = CX24116_SEARCH_RANGE_KHZ & 0xff;
+        cmd.args[0x0a] = 0x00;
+        cmd.args[0x0b] = 0x00;
+        cmd.args[0x0c] = 0x02;
+        cmd.args[0x0d] = state->dcur.fec_mask;
+        cmd.args[0x0e] = 0x06;
+        cmd.args[0x0f] = 0x00;
+        cmd.args[0x10] = 0x00;
+        cmd.args[0x11] = 0xFA;
+        cmd.args[0x12] = 0x24;
+        cmd.len= 0x13;
+
+        /* We need to support pilot and non-pilot tuning in the
+         * driver automatically. This is a workaround for because
+         * the demod does not support autodetect.
+         */
+        do {
+                /* Reset status register? */
+                cx24116_writereg(state, 0x9d, 0xc1);
+
+                /* Tune */
+                ret = cx24116_cmd_execute(fe, &cmd);
+                if( ret != 0 )
+                        break;
+
+                /* The hardware can take time to lock, wait a while */
+                msleep(500);
+
+                cx24116_read_status(fe, &tunerstat);
+                if(tunerstat & FE_HAS_SIGNAL) {
+                        if(tunerstat & FE_HAS_SYNC)
+                                /* Tuned */
+                                break;
+                        else if(c->pilot == PILOT_AUTO)
+                                /* Toggle pilot bit */
+                                cmd.args[0x07] ^= 0x40;
+                }
+        }
+        while(--retune);
+
+        return ret;
+}
+
+static struct dvb_frontend_ops cx24116_ops = {
+
+        .info = {
+                .name = "Conexant CX24116/CX24118",
+                .type = FE_QPSK,
+                .frequency_min = 950000,
+                .frequency_max = 2150000,
+                .frequency_stepsize = 1011, /* kHz for QPSK frontends */
+                .frequency_tolerance = 5000,
+                .symbol_rate_min = 1000000,
+                .symbol_rate_max = 45000000,
+                .caps = FE_CAN_INVERSION_AUTO |
+                        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_AUTO |
+                        FE_CAN_QPSK | FE_CAN_RECOVER
+        },
+
+        .release = cx24116_release,
+
+        .init = cx24116_initfe,
+        .read_status = cx24116_read_status,
+        .read_ber = cx24116_read_ber,
+        .read_signal_strength = cx24116_read_signal_strength,
+        .read_snr = cx24116_read_snr,
+        .read_ucblocks = cx24116_read_ucblocks,
+        .set_tone = cx24116_set_tone,
+        .set_voltage = cx24116_set_voltage,
+        .diseqc_send_master_cmd = cx24116_send_diseqc_msg,
+        .diseqc_send_burst = cx24116_diseqc_send_burst,
+
+        .set_property = cx24116_set_property,
+        .set_params = cx24116_set_params,
+        .set_frontend = cx24116_set_frontend,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
+
+MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24116/cx24118 hardware");
+MODULE_AUTHOR("Steven Toth");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(cx24116_attach);
diff --git a/drivers/media/dvb/frontends/cx24116.h b/drivers/media/dvb/frontends/cx24116.h
new file mode 100644
index 000000000000..27896725204a
--- /dev/null
+++ b/drivers/media/dvb/frontends/cx24116.h
@@ -0,0 +1,50 @@
+/*
+    Conexant cx24116/cx24118 - DVBS/S2 Satellite demod/tuner driver
+
+    Copyright (C) 2006 Steven Toth <stoth@linuxtv.com>
+
+    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.
+*/
+
+#ifndef CX24116_H
+#define CX24116_H
+
+#include <linux/dvb/frontend.h>
+
+struct cx24116_config
+{
+        /* the demodulator's i2c address */
+        u8 demod_address;
+
+        /* Need to set device param for start_dma */
+        int (*set_ts_params)(struct dvb_frontend* fe, int is_punctured);
+
+        /* Need to reset device during firmware loading */
+        int (*reset_device)(struct dvb_frontend* fe);
+};
+
+#if defined(CONFIG_DVB_CX24116) || defined(CONFIG_DVB_CX24116_MODULE)
+extern struct dvb_frontend* cx24116_attach(const struct cx24116_config* config,
+                                           struct i2c_adapter* i2c);
+#else
+static inline struct dvb_frontend* cx24116_attach(const struct cx24116_config* config,
+                                                  struct i2c_adapter* i2c)
+{
+        printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __FUNCTION__);
+        return NULL;
+}
+#endif // CONFIG_DVB_CX24116
+
+#endif /* CX24116_H */