1 files changed, 666 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/cx24110.c b/drivers/media/dvb-frontends/cx24110.c
new file mode 100644
index 000000000000..3180f5b2a6a6
--- /dev/null
+++ b/drivers/media/dvb-frontends/cx24110.c
@@ -0,0 +1,666 @@
+/*
+    cx24110 - Single Chip Satellite Channel Receiver driver module
+
+    Copyright (C) 2002 Peter Hettkamp <peter.hettkamp@htp-tel.de> based on
+    work
+    Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
+
+    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/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "dvb_frontend.h"
+#include "cx24110.h"
+
+
+struct cx24110_state {
+
+        struct i2c_adapter* i2c;
+
+        const struct cx24110_config* config;
+
+        struct dvb_frontend frontend;
+
+        u32 lastber;
+        u32 lastbler;
+        u32 lastesn0;
+};
+
+static int debug;
+#define dprintk(args...) \
+        do { \
+                if (debug) printk(KERN_DEBUG "cx24110: " args); \
+        } while (0)
+
+static struct {u8 reg; u8 data;} cx24110_regdata[]=
+                      /* Comments beginning with @ denote this value should
+                         be the default */
+        {{0x09,0x01}, /* SoftResetAll */
+         {0x09,0x00}, /* release reset */
+         {0x01,0xe8}, /* MSB of code rate 27.5MS/s */
+         {0x02,0x17}, /* middle byte " */
+         {0x03,0x29}, /* LSB         " */
+         {0x05,0x03}, /* @ DVB mode, standard code rate 3/4 */
+         {0x06,0xa5}, /* @ PLL 60MHz */
+         {0x07,0x01}, /* @ Fclk, i.e. sampling clock, 60MHz */
+         {0x0a,0x00}, /* @ partial chip disables, do not set */
+         {0x0b,0x01}, /* set output clock in gapped mode, start signal low
+                         active for first byte */
+         {0x0c,0x11}, /* no parity bytes, large hold time, serial data out */
+         {0x0d,0x6f}, /* @ RS Sync/Unsync thresholds */
+         {0x10,0x40}, /* chip doc is misleading here: write bit 6 as 1
+                         to avoid starting the BER counter. Reset the
+                         CRC test bit. Finite counting selected */
+         {0x15,0xff}, /* @ size of the limited time window for RS BER
+                         estimation. It is <value>*256 RS blocks, this
+                         gives approx. 2.6 sec at 27.5MS/s, rate 3/4 */
+         {0x16,0x00}, /* @ enable all RS output ports */
+         {0x17,0x04}, /* @ time window allowed for the RS to sync */
+         {0x18,0xae}, /* @ allow all standard DVB code rates to be scanned
+                         for automatically */
+                      /* leave the current code rate and normalization
+                         registers as they are after reset... */
+         {0x21,0x10}, /* @ during AutoAcq, search each viterbi setting
+                         only once */
+         {0x23,0x18}, /* @ size of the limited time window for Viterbi BER
+                         estimation. It is <value>*65536 channel bits, i.e.
+                         approx. 38ms at 27.5MS/s, rate 3/4 */
+         {0x24,0x24}, /* do not trigger Viterbi CRC test. Finite count window */
+                      /* leave front-end AGC parameters at default values */
+                      /* leave decimation AGC parameters at default values */
+         {0x35,0x40}, /* disable all interrupts. They are not connected anyway */
+         {0x36,0xff}, /* clear all interrupt pending flags */
+         {0x37,0x00}, /* @ fully enable AutoAcqq state machine */
+         {0x38,0x07}, /* @ enable fade recovery, but not autostart AutoAcq */
+                      /* leave the equalizer parameters on their default values */
+                      /* leave the final AGC parameters on their default values */
+         {0x41,0x00}, /* @ MSB of front-end derotator frequency */
+         {0x42,0x00}, /* @ middle bytes " */
+         {0x43,0x00}, /* @ LSB          " */
+                      /* leave the carrier tracking loop parameters on default */
+                      /* leave the bit timing loop parameters at default */
+         {0x56,0x4d}, /* set the filtune voltage to 2.7V, as recommended by */
+                      /* the cx24108 data sheet for symbol rates above 15MS/s */
+         {0x57,0x00}, /* @ Filter sigma delta enabled, positive */
+         {0x61,0x95}, /* GPIO pins 1-4 have special function */
+         {0x62,0x05}, /* GPIO pin 5 has special function, pin 6 is GPIO */
+         {0x63,0x00}, /* All GPIO pins use CMOS output characteristics */
+         {0x64,0x20}, /* GPIO 6 is input, all others are outputs */
+         {0x6d,0x30}, /* tuner auto mode clock freq 62kHz */
+         {0x70,0x15}, /* use auto mode, tuner word is 21 bits long */
+         {0x73,0x00}, /* @ disable several demod bypasses */
+         {0x74,0x00}, /* @  " */
+         {0x75,0x00}  /* @  " */
+                      /* the remaining registers are for SEC */
+        };
+
+
+static int cx24110_writereg (struct cx24110_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 ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
+                dprintk ("%s: writereg error (err == %i, reg == 0x%02x,"
+                         " data == 0x%02x)\n", __func__, err, reg, data);
+                return -EREMOTEIO;
+        }
+
+        return 0;
+}
+
+static int cx24110_readreg (struct cx24110_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) return ret;
+
+        return b1[0];
+}
+
+static int cx24110_set_inversion (struct cx24110_state* state, fe_spectral_inversion_t inversion)
+{
+/* fixme (low): error handling */
+
+        switch (inversion) {
+        case INVERSION_OFF:
+                cx24110_writereg(state,0x37,cx24110_readreg(state,0x37)|0x1);
+                /* AcqSpectrInvDis on. No idea why someone should want this */
+                cx24110_writereg(state,0x5,cx24110_readreg(state,0x5)&0xf7);
+                /* Initial value 0 at start of acq */
+                cx24110_writereg(state,0x22,cx24110_readreg(state,0x22)&0xef);
+                /* current value 0 */
+                /* The cx24110 manual tells us this reg is read-only.
+                   But what the heck... set it ayways */
+                break;
+        case INVERSION_ON:
+                cx24110_writereg(state,0x37,cx24110_readreg(state,0x37)|0x1);
+                /* AcqSpectrInvDis on. No idea why someone should want this */
+                cx24110_writereg(state,0x5,cx24110_readreg(state,0x5)|0x08);
+                /* Initial value 1 at start of acq */
+                cx24110_writereg(state,0x22,cx24110_readreg(state,0x22)|0x10);
+                /* current value 1 */
+                break;
+        case INVERSION_AUTO:
+                cx24110_writereg(state,0x37,cx24110_readreg(state,0x37)&0xfe);
+                /* AcqSpectrInvDis off. Leave initial & current states as is */
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static int cx24110_set_fec (struct cx24110_state* state, fe_code_rate_t fec)
+{
+/* fixme (low): error handling */
+
+        static const int rate[]={-1,1,2,3,5,7,-1};
+        static const int g1[]={-1,0x01,0x02,0x05,0x15,0x45,-1};
+        static const int g2[]={-1,0x01,0x03,0x06,0x1a,0x7a,-1};
+
+        /* Well, the AutoAcq engine of the cx24106 and 24110 automatically
+           searches all enabled viterbi rates, and can handle non-standard
+           rates as well. */
+
+        if (fec>FEC_AUTO)
+                fec=FEC_AUTO;
+
+        if (fec==FEC_AUTO) { /* (re-)establish AutoAcq behaviour */
+                cx24110_writereg(state,0x37,cx24110_readreg(state,0x37)&0xdf);
+                /* clear AcqVitDis bit */
+                cx24110_writereg(state,0x18,0xae);
+                /* allow all DVB standard code rates */
+                cx24110_writereg(state,0x05,(cx24110_readreg(state,0x05)&0xf0)|0x3);
+                /* set nominal Viterbi rate 3/4 */
+                cx24110_writereg(state,0x22,(cx24110_readreg(state,0x22)&0xf0)|0x3);
+                /* set current Viterbi rate 3/4 */
+                cx24110_writereg(state,0x1a,0x05); cx24110_writereg(state,0x1b,0x06);
+                /* set the puncture registers for code rate 3/4 */
+                return 0;
+        } else {
+                cx24110_writereg(state,0x37,cx24110_readreg(state,0x37)|0x20);
+                /* set AcqVitDis bit */
+                if(rate[fec]>0) {
+                        cx24110_writereg(state,0x05,(cx24110_readreg(state,0x05)&0xf0)|rate[fec]);
+                        /* set nominal Viterbi rate */
+                        cx24110_writereg(state,0x22,(cx24110_readreg(state,0x22)&0xf0)|rate[fec]);
+                        /* set current Viterbi rate */
+                        cx24110_writereg(state,0x1a,g1[fec]);
+                        cx24110_writereg(state,0x1b,g2[fec]);
+                        /* not sure if this is the right way: I always used AutoAcq mode */
+           } else
+                   return -EOPNOTSUPP;
+/* fixme (low): which is the correct return code? */
+        };
+        return 0;
+}
+
+static fe_code_rate_t cx24110_get_fec (struct cx24110_state* state)
+{
+        int i;
+
+        i=cx24110_readreg(state,0x22)&0x0f;
+        if(!(i&0x08)) {
+                return FEC_1_2 + i - 1;
+        } else {
+/* fixme (low): a special code rate has been selected. In theory, we need to
+   return a denominator value, a numerator value, and a pair of puncture
+   maps to correctly describe this mode. But this should never happen in
+   practice, because it cannot be set by cx24110_get_fec. */
+           return FEC_NONE;
+        }
+}
+
+static int cx24110_set_symbolrate (struct cx24110_state* state, u32 srate)
+{
+/* fixme (low): add error handling */
+        u32 ratio;
+        u32 tmp, fclk, BDRI;
+
+        static const u32 bands[]={5000000UL,15000000UL,90999000UL/2};
+        int i;
+
+        dprintk("cx24110 debug: entering %s(%d)\n",__func__,srate);
+        if (srate>90999000UL/2)
+                srate=90999000UL/2;
+        if (srate<500000)
+                srate=500000;
+
+        for(i = 0; (i < ARRAY_SIZE(bands)) && (srate>bands[i]); i++)
+                ;
+        /* first, check which sample rate is appropriate: 45, 60 80 or 90 MHz,
+           and set the PLL accordingly (R07[1:0] Fclk, R06[7:4] PLLmult,
+           R06[3:0] PLLphaseDetGain */
+        tmp=cx24110_readreg(state,0x07)&0xfc;
+        if(srate<90999000UL/4) { /* sample rate 45MHz*/
+                cx24110_writereg(state,0x07,tmp);
+                cx24110_writereg(state,0x06,0x78);
+                fclk=90999000UL/2;
+        } else if(srate<60666000UL/2) { /* sample rate 60MHz */
+                cx24110_writereg(state,0x07,tmp|0x1);
+                cx24110_writereg(state,0x06,0xa5);
+                fclk=60666000UL;
+        } else if(srate<80888000UL/2) { /* sample rate 80MHz */
+                cx24110_writereg(state,0x07,tmp|0x2);
+                cx24110_writereg(state,0x06,0x87);
+                fclk=80888000UL;
+        } else { /* sample rate 90MHz */
+                cx24110_writereg(state,0x07,tmp|0x3);
+                cx24110_writereg(state,0x06,0x78);
+                fclk=90999000UL;
+        };
+        dprintk("cx24110 debug: fclk %d Hz\n",fclk);
+        /* we need to divide two integers with approx. 27 bits in 32 bit
+           arithmetic giving a 25 bit result */
+        /* the maximum dividend is 90999000/2, 0x02b6446c, this number is
+           also the most complex divisor. Hence, the dividend has,
+           assuming 32bit unsigned arithmetic, 6 clear bits on top, the
+           divisor 2 unused bits at the bottom. Also, the quotient is
+           always less than 1/2. Borrowed from VES1893.c, of course */
+
+        tmp=srate<<6;
+        BDRI=fclk>>2;
+        ratio=(tmp/BDRI);
+
+        tmp=(tmp%BDRI)<<8;
+        ratio=(ratio<<8)+(tmp/BDRI);
+
+        tmp=(tmp%BDRI)<<8;
+        ratio=(ratio<<8)+(tmp/BDRI);
+
+        tmp=(tmp%BDRI)<<1;
+        ratio=(ratio<<1)+(tmp/BDRI);
+
+        dprintk("srate= %d (range %d, up to %d)\n", srate,i,bands[i]);
+        dprintk("fclk = %d\n", fclk);
+        dprintk("ratio= %08x\n", ratio);
+
+        cx24110_writereg(state, 0x1, (ratio>>16)&0xff);
+        cx24110_writereg(state, 0x2, (ratio>>8)&0xff);
+        cx24110_writereg(state, 0x3, (ratio)&0xff);
+
+        return 0;
+
+}
+
+static int _cx24110_pll_write (struct dvb_frontend* fe, const u8 buf[], int len)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+        if (len != 3)
+                return -EINVAL;
+
+/* tuner data is 21 bits long, must be left-aligned in data */
+/* tuner cx24108 is written through a dedicated 3wire interface on the demod chip */
+/* FIXME (low): add error handling, avoid infinite loops if HW fails... */
+
+        cx24110_writereg(state,0x6d,0x30); /* auto mode at 62kHz */
+        cx24110_writereg(state,0x70,0x15); /* auto mode 21 bits */
+
+        /* if the auto tuner writer is still busy, clear it out */
+        while (cx24110_readreg(state,0x6d)&0x80)
+                cx24110_writereg(state,0x72,0);
+
+        /* write the topmost 8 bits */
+        cx24110_writereg(state,0x72,buf[0]);
+
+        /* wait for the send to be completed */
+        while ((cx24110_readreg(state,0x6d)&0xc0)==0x80)
+                ;
+
+        /* send another 8 bytes */
+        cx24110_writereg(state,0x72,buf[1]);
+        while ((cx24110_readreg(state,0x6d)&0xc0)==0x80)
+                ;
+
+        /* and the topmost 5 bits of this byte */
+        cx24110_writereg(state,0x72,buf[2]);
+        while ((cx24110_readreg(state,0x6d)&0xc0)==0x80)
+                ;
+
+        /* now strobe the enable line once */
+        cx24110_writereg(state,0x6d,0x32);
+        cx24110_writereg(state,0x6d,0x30);
+
+        return 0;
+}
+
+static int cx24110_initfe(struct dvb_frontend* fe)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+/* fixme (low): error handling */
+        int i;
+
+        dprintk("%s: init chip\n", __func__);
+
+        for(i = 0; i < ARRAY_SIZE(cx24110_regdata); i++) {
+                cx24110_writereg(state, cx24110_regdata[i].reg, cx24110_regdata[i].data);
+        };
+
+        return 0;
+}
+
+static int cx24110_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+        switch (voltage) {
+        case SEC_VOLTAGE_13:
+                return cx24110_writereg(state,0x76,(cx24110_readreg(state,0x76)&0x3b)|0xc0);
+        case SEC_VOLTAGE_18:
+                return cx24110_writereg(state,0x76,(cx24110_readreg(state,0x76)&0x3b)|0x40);
+        default:
+                return -EINVAL;
+        };
+}
+
+static int cx24110_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
+{
+        int rv, bit;
+        struct cx24110_state *state = fe->demodulator_priv;
+        unsigned long timeout;
+
+        if (burst == SEC_MINI_A)
+                bit = 0x00;
+        else if (burst == SEC_MINI_B)
+                bit = 0x08;
+        else
+                return -EINVAL;
+
+        rv = cx24110_readreg(state, 0x77);
+        if (!(rv & 0x04))
+                cx24110_writereg(state, 0x77, rv | 0x04);
+
+        rv = cx24110_readreg(state, 0x76);
+        cx24110_writereg(state, 0x76, ((rv & 0x90) | 0x40 | bit));
+        timeout = jiffies + msecs_to_jiffies(100);
+        while (!time_after(jiffies, timeout) && !(cx24110_readreg(state, 0x76) & 0x40))
+                ; /* wait for LNB ready */
+
+        return 0;
+}
+
+static int cx24110_send_diseqc_msg(struct dvb_frontend* fe,
+                                   struct dvb_diseqc_master_cmd *cmd)
+{
+        int i, rv;
+        struct cx24110_state *state = fe->demodulator_priv;
+        unsigned long timeout;
+
+        if (cmd->msg_len < 3 || cmd->msg_len > 6)
+                return -EINVAL;  /* not implemented */
+
+        for (i = 0; i < cmd->msg_len; i++)
+                cx24110_writereg(state, 0x79 + i, cmd->msg[i]);
+
+        rv = cx24110_readreg(state, 0x77);
+        if (rv & 0x04) {
+                cx24110_writereg(state, 0x77, rv & ~0x04);
+                msleep(30); /* reportedly fixes switching problems */
+        }
+
+        rv = cx24110_readreg(state, 0x76);
+
+        cx24110_writereg(state, 0x76, ((rv & 0x90) | 0x40) | ((cmd->msg_len-3) & 3));
+        timeout = jiffies + msecs_to_jiffies(100);
+        while (!time_after(jiffies, timeout) && !(cx24110_readreg(state, 0x76) & 0x40))
+                ; /* wait for LNB ready */
+
+        return 0;
+}
+
+static int cx24110_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+        int sync = cx24110_readreg (state, 0x55);
+
+        *status = 0;
+
+        if (sync & 0x10)
+                *status |= FE_HAS_SIGNAL;
+
+        if (sync & 0x08)
+                *status |= FE_HAS_CARRIER;
+
+        sync = cx24110_readreg (state, 0x08);
+
+        if (sync & 0x40)
+                *status |= FE_HAS_VITERBI;
+
+        if (sync & 0x20)
+                *status |= FE_HAS_SYNC;
+
+        if ((sync & 0x60) == 0x60)
+                *status |= FE_HAS_LOCK;
+
+        return 0;
+}
+
+static int cx24110_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+        /* fixme (maybe): value range is 16 bit. Scale? */
+        if(cx24110_readreg(state,0x24)&0x10) {
+                /* the Viterbi error counter has finished one counting window */
+                cx24110_writereg(state,0x24,0x04); /* select the ber reg */
+                state->lastber=cx24110_readreg(state,0x25)|
+                        (cx24110_readreg(state,0x26)<<8);
+                cx24110_writereg(state,0x24,0x04); /* start new count window */
+                cx24110_writereg(state,0x24,0x14);
+        }
+        *ber = state->lastber;
+
+        return 0;
+}
+
+static int cx24110_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+/* no provision in hardware. Read the frontend AGC accumulator. No idea how to scale this, but I know it is 2s complement */
+        u8 signal = cx24110_readreg (state, 0x27)+128;
+        *signal_strength = (signal << 8) | signal;
+
+        return 0;
+}
+
+static int cx24110_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+        /* no provision in hardware. Can be computed from the Es/N0 estimator, but I don't know how. */
+        if(cx24110_readreg(state,0x6a)&0x80) {
+                /* the Es/N0 error counter has finished one counting window */
+                state->lastesn0=cx24110_readreg(state,0x69)|
+                        (cx24110_readreg(state,0x68)<<8);
+                cx24110_writereg(state,0x6a,0x84); /* start new count window */
+        }
+        *snr = state->lastesn0;
+
+        return 0;
+}
+
+static int cx24110_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+        if(cx24110_readreg(state,0x10)&0x40) {
+                /* the RS error counter has finished one counting window */
+                cx24110_writereg(state,0x10,0x60); /* select the byer reg */
+                (void)(cx24110_readreg(state, 0x12) |
+                        (cx24110_readreg(state, 0x13) << 8) |
+                        (cx24110_readreg(state, 0x14) << 16));
+                cx24110_writereg(state,0x10,0x70); /* select the bler reg */
+                state->lastbler=cx24110_readreg(state,0x12)|
+                        (cx24110_readreg(state,0x13)<<8)|
+                        (cx24110_readreg(state,0x14)<<16);
+                cx24110_writereg(state,0x10,0x20); /* start new count window */
+        }
+        *ucblocks = state->lastbler;
+
+        return 0;
+}
+
+static int cx24110_set_frontend(struct dvb_frontend *fe)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+
+        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);
+        }
+
+        cx24110_set_inversion(state, p->inversion);
+        cx24110_set_fec(state, p->fec_inner);
+        cx24110_set_symbolrate(state, p->symbol_rate);
+        cx24110_writereg(state,0x04,0x05); /* start acquisition */
+
+        return 0;
+}
+
+static int cx24110_get_frontend(struct dvb_frontend *fe)
+{
+        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+        struct cx24110_state *state = fe->demodulator_priv;
+        s32 afc; unsigned sclk;
+
+/* cannot read back tuner settings (freq). Need to have some private storage */
+
+        sclk = cx24110_readreg (state, 0x07) & 0x03;
+/* ok, real AFC (FEDR) freq. is afc/2^24*fsamp, fsamp=45/60/80/90MHz.
+ * Need 64 bit arithmetic. Is thiss possible in the kernel? */
+        if (sclk==0) sclk=90999000L/2L;
+        else if (sclk==1) sclk=60666000L;
+        else if (sclk==2) sclk=80888000L;
+        else sclk=90999000L;
+        sclk>>=8;
+        afc = sclk*(cx24110_readreg (state, 0x44)&0x1f)+
+              ((sclk*cx24110_readreg (state, 0x45))>>8)+
+              ((sclk*cx24110_readreg (state, 0x46))>>16);
+
+        p->frequency += afc;
+        p->inversion = (cx24110_readreg (state, 0x22) & 0x10) ?
+                                INVERSION_ON : INVERSION_OFF;
+        p->fec_inner = cx24110_get_fec(state);
+
+        return 0;
+}
+
+static int cx24110_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
+{
+        struct cx24110_state *state = fe->demodulator_priv;
+
+        return cx24110_writereg(state,0x76,(cx24110_readreg(state,0x76)&~0x10)|(((tone==SEC_TONE_ON))?0x10:0));
+}
+
+static void cx24110_release(struct dvb_frontend* fe)
+{
+        struct cx24110_state* state = fe->demodulator_priv;
+        kfree(state);
+}
+
+static struct dvb_frontend_ops cx24110_ops;
+
+struct dvb_frontend* cx24110_attach(const struct cx24110_config* config,
+                                    struct i2c_adapter* i2c)
+{
+        struct cx24110_state* state = NULL;
+        int ret;
+
+        /* allocate memory for the internal state */
+        state = kzalloc(sizeof(struct cx24110_state), GFP_KERNEL);
+        if (state == NULL) goto error;
+
+        /* setup the state */
+        state->config = config;
+        state->i2c = i2c;
+        state->lastber = 0;
+        state->lastbler = 0;
+        state->lastesn0 = 0;
+
+        /* check if the demod is there */
+        ret = cx24110_readreg(state, 0x00);
+        if ((ret != 0x5a) && (ret != 0x69)) goto error;
+
+        /* create dvb_frontend */
+        memcpy(&state->frontend.ops, &cx24110_ops, sizeof(struct dvb_frontend_ops));
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+        return NULL;
+}
+
+static struct dvb_frontend_ops cx24110_ops = {
+        .delsys = { SYS_DVBS },
+        .info = {
+                .name = "Conexant CX24110 DVB-S",
+                .frequency_min = 950000,
+                .frequency_max = 2150000,
+                .frequency_stepsize = 1011,  /* kHz for QPSK frontends */
+                .frequency_tolerance = 29500,
+                .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_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+                        FE_CAN_QPSK | FE_CAN_RECOVER
+        },
+
+        .release = cx24110_release,
+
+        .init = cx24110_initfe,
+        .write = _cx24110_pll_write,
+        .set_frontend = cx24110_set_frontend,
+        .get_frontend = cx24110_get_frontend,
+        .read_status = cx24110_read_status,
+        .read_ber = cx24110_read_ber,
+        .read_signal_strength = cx24110_read_signal_strength,
+        .read_snr = cx24110_read_snr,
+        .read_ucblocks = cx24110_read_ucblocks,
+
+        .diseqc_send_master_cmd = cx24110_send_diseqc_msg,
+        .set_tone = cx24110_set_tone,
+        .set_voltage = cx24110_set_voltage,
+        .diseqc_send_burst = cx24110_diseqc_send_burst,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Conexant CX24110 DVB-S Demodulator driver");
+MODULE_AUTHOR("Peter Hettkamp");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(cx24110_attach);