Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 798 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/stv0297.c b/drivers/media/dvb/frontends/stv0297.c
new file mode 100644
index 000000000000..502c6403dfc6
--- /dev/null
+++ b/drivers/media/dvb/frontends/stv0297.c
@@ -0,0 +1,798 @@
+/*
+    Driver for STV0297 demodulator
+
+    Copyright (C) 2004 Andrew de Quincey <adq_dvb@lidskialf.net>
+    Copyright (C) 2003-2004 Dennis Noermann <dennis.noermann@noernet.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/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+
+#include "dvb_frontend.h"
+#include "stv0297.h"
+
+struct stv0297_state {
+        struct i2c_adapter *i2c;
+        struct dvb_frontend_ops ops;
+        const struct stv0297_config *config;
+        struct dvb_frontend frontend;
+
+        unsigned long base_freq;
+        u8 pwm;
+};
+
+#if 1
+#define dprintk(x...) printk(x)
+#else
+#define dprintk(x...)
+#endif
+
+#define STV0297_CLOCK_KHZ   28900
+
+static u8 init_tab[] = {
+        0x00, 0x09,
+        0x01, 0x69,
+        0x03, 0x00,
+        0x04, 0x00,
+        0x07, 0x00,
+        0x08, 0x00,
+        0x20, 0x00,
+        0x21, 0x40,
+        0x22, 0x00,
+        0x23, 0x00,
+        0x24, 0x40,
+        0x25, 0x88,
+        0x30, 0xff,
+        0x31, 0x00,
+        0x32, 0xff,
+        0x33, 0x00,
+        0x34, 0x50,
+        0x35, 0x7f,
+        0x36, 0x00,
+        0x37, 0x20,
+        0x38, 0x00,
+        0x40, 0x1c,
+        0x41, 0xff,
+        0x42, 0x29,
+        0x43, 0x00,
+        0x44, 0xff,
+        0x45, 0x00,
+        0x46, 0x00,
+        0x49, 0x04,
+        0x4a, 0xff,
+        0x4b, 0x7f,
+        0x52, 0x30,
+        0x55, 0xae,
+        0x56, 0x47,
+        0x57, 0xe1,
+        0x58, 0x3a,
+        0x5a, 0x1e,
+        0x5b, 0x34,
+        0x60, 0x00,
+        0x63, 0x00,
+        0x64, 0x00,
+        0x65, 0x00,
+        0x66, 0x00,
+        0x67, 0x00,
+        0x68, 0x00,
+        0x69, 0x00,
+        0x6a, 0x02,
+        0x6b, 0x00,
+        0x70, 0xff,
+        0x71, 0x00,
+        0x72, 0x00,
+        0x73, 0x00,
+        0x74, 0x0c,
+        0x80, 0x00,
+        0x81, 0x00,
+        0x82, 0x00,
+        0x83, 0x00,
+        0x84, 0x04,
+        0x85, 0x80,
+        0x86, 0x24,
+        0x87, 0x78,
+        0x88, 0x00,
+        0x89, 0x00,
+        0x90, 0x01,
+        0x91, 0x01,
+        0xa0, 0x00,
+        0xa1, 0x00,
+        0xa2, 0x00,
+        0xb0, 0x91,
+        0xb1, 0x0b,
+        0xc0, 0x53,
+        0xc1, 0x70,
+        0xc2, 0x12,
+        0xd0, 0x00,
+        0xd1, 0x00,
+        0xd2, 0x00,
+        0xd3, 0x00,
+        0xd4, 0x00,
+        0xd5, 0x00,
+        0xde, 0x00,
+        0xdf, 0x00,
+        0x61, 0x49,
+        0x62, 0x0b,
+        0x53, 0x08,
+        0x59, 0x08,
+};
+
+
+static int stv0297_writereg(struct stv0297_state *state, u8 reg, u8 data)
+{
+        int ret;
+        u8 buf[] = { reg, data };
+        struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
+
+        ret = i2c_transfer(state->i2c, &msg, 1);
+
+        if (ret != 1)
+                dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
+                        "ret == %i)\n", __FUNCTION__, reg, data, ret);
+
+        return (ret != 1) ? -1 : 0;
+}
+
+static int stv0297_readreg(struct stv0297_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}
+        };
+
+        // this device needs a STOP between the register and data
+        if ((ret = i2c_transfer(state->i2c, &msg[0], 1)) != 1) {
+                dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n", __FUNCTION__, reg, ret);
+                return -1;
+        }
+        if ((ret = i2c_transfer(state->i2c, &msg[1], 1)) != 1) {
+                dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n", __FUNCTION__, reg, ret);
+                return -1;
+        }
+
+        return b1[0];
+}
+
+static int stv0297_writereg_mask(struct stv0297_state *state, u8 reg, u8 mask, u8 data)
+{
+        int val;
+
+        val = stv0297_readreg(state, reg);
+        val &= ~mask;
+        val |= (data & mask);
+        stv0297_writereg(state, reg, val);
+
+        return 0;
+}
+
+static int stv0297_readregs(struct stv0297_state *state, u8 reg1, u8 * b, u8 len)
+{
+        int ret;
+        struct i2c_msg msg[] = { {.addr = state->config->demod_address,.flags = 0,.buf =
+                                  &reg1,.len = 1},
+        {.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b,.len = len}
+        };
+
+        // this device needs a STOP between the register and data
+        if ((ret = i2c_transfer(state->i2c, &msg[0], 1)) != 1) {
+                dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n", __FUNCTION__, reg1, ret);
+                return -1;
+        }
+        if ((ret = i2c_transfer(state->i2c, &msg[1], 1)) != 1) {
+                dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n", __FUNCTION__, reg1, ret);
+                return -1;
+        }
+
+        return 0;
+}
+
+static u32 stv0297_get_symbolrate(struct stv0297_state *state)
+{
+        u64 tmp;
+
+        tmp = stv0297_readreg(state, 0x55);
+        tmp |= stv0297_readreg(state, 0x56) << 8;
+        tmp |= stv0297_readreg(state, 0x57) << 16;
+        tmp |= stv0297_readreg(state, 0x58) << 24;
+
+        tmp *= STV0297_CLOCK_KHZ;
+        tmp >>= 32;
+
+        return (u32) tmp;
+}
+
+static void stv0297_set_symbolrate(struct stv0297_state *state, u32 srate)
+{
+        long tmp;
+
+        tmp = 131072L * srate;  /* 131072 = 2^17  */
+        tmp = tmp / (STV0297_CLOCK_KHZ / 4);    /* 1/4 = 2^-2 */
+        tmp = tmp * 8192L;      /* 8192 = 2^13 */
+
+        stv0297_writereg(state, 0x55, (unsigned char) (tmp & 0xFF));
+        stv0297_writereg(state, 0x56, (unsigned char) (tmp >> 8));
+        stv0297_writereg(state, 0x57, (unsigned char) (tmp >> 16));
+        stv0297_writereg(state, 0x58, (unsigned char) (tmp >> 24));
+}
+
+static void stv0297_set_sweeprate(struct stv0297_state *state, short fshift, long symrate)
+{
+        long tmp;
+
+        tmp = (long) fshift *262144L;   /* 262144 = 2*18 */
+        tmp /= symrate;
+        tmp *= 1024;            /* 1024 = 2*10   */
+
+        // adjust
+        if (tmp >= 0) {
+                tmp += 500000;
+        } else {
+                tmp -= 500000;
+        }
+        tmp /= 1000000;
+
+        stv0297_writereg(state, 0x60, tmp & 0xFF);
+        stv0297_writereg_mask(state, 0x69, 0xF0, (tmp >> 4) & 0xf0);
+}
+
+static void stv0297_set_carrieroffset(struct stv0297_state *state, long offset)
+{
+        long tmp;
+
+        /* symrate is hardcoded to 10000 */
+        tmp = offset * 26844L;  /* (2**28)/10000 */
+        if (tmp < 0)
+                tmp += 0x10000000;
+        tmp &= 0x0FFFFFFF;
+
+        stv0297_writereg(state, 0x66, (unsigned char) (tmp & 0xFF));
+        stv0297_writereg(state, 0x67, (unsigned char) (tmp >> 8));
+        stv0297_writereg(state, 0x68, (unsigned char) (tmp >> 16));
+        stv0297_writereg_mask(state, 0x69, 0x0F, (tmp >> 24) & 0x0f);
+}
+
+/*
+static long stv0297_get_carrieroffset(struct stv0297_state *state)
+{
+        s64 tmp;
+
+        stv0297_writereg(state, 0x6B, 0x00);
+
+        tmp = stv0297_readreg(state, 0x66);
+        tmp |= (stv0297_readreg(state, 0x67) << 8);
+        tmp |= (stv0297_readreg(state, 0x68) << 16);
+        tmp |= (stv0297_readreg(state, 0x69) & 0x0F) << 24;
+
+        tmp *= stv0297_get_symbolrate(state);
+        tmp >>= 28;
+
+        return (s32) tmp;
+}
+*/
+
+static void stv0297_set_initialdemodfreq(struct stv0297_state *state, long freq)
+{
+        s32 tmp;
+
+        if (freq > 10000)
+                freq -= STV0297_CLOCK_KHZ;
+
+        tmp = (STV0297_CLOCK_KHZ * 1000) / (1 << 16);
+        tmp = (freq * 1000) / tmp;
+        if (tmp > 0xffff)
+                tmp = 0xffff;
+
+        stv0297_writereg_mask(state, 0x25, 0x80, 0x80);
+        stv0297_writereg(state, 0x21, tmp >> 8);
+        stv0297_writereg(state, 0x20, tmp);
+}
+
+static int stv0297_set_qam(struct stv0297_state *state, fe_modulation_t modulation)
+{
+        int val = 0;
+
+        switch (modulation) {
+        case QAM_16:
+                val = 0;
+                break;
+
+        case QAM_32:
+                val = 1;
+                break;
+
+        case QAM_64:
+                val = 4;
+                break;
+
+        case QAM_128:
+                val = 2;
+                break;
+
+        case QAM_256:
+                val = 3;
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        stv0297_writereg_mask(state, 0x00, 0x70, val << 4);
+
+        return 0;
+}
+
+static int stv0297_set_inversion(struct stv0297_state *state, fe_spectral_inversion_t inversion)
+{
+        int val = 0;
+
+        switch (inversion) {
+        case INVERSION_OFF:
+                val = 0;
+                break;
+
+        case INVERSION_ON:
+                val = 1;
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        stv0297_writereg_mask(state, 0x83, 0x08, val << 3);
+
+        return 0;
+}
+
+int stv0297_enable_plli2c(struct dvb_frontend *fe)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+
+        stv0297_writereg(state, 0x87, 0x78);
+        stv0297_writereg(state, 0x86, 0xc8);
+
+        return 0;
+}
+
+static int stv0297_init(struct dvb_frontend *fe)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+        int i;
+
+        /* soft reset */
+        stv0297_writereg_mask(state, 0x80, 1, 1);
+        stv0297_writereg_mask(state, 0x80, 1, 0);
+
+        /* reset deinterleaver */
+        stv0297_writereg_mask(state, 0x81, 1, 1);
+        stv0297_writereg_mask(state, 0x81, 1, 0);
+
+        /* load init table */
+        for (i = 0; i < sizeof(init_tab); i += 2) {
+                stv0297_writereg(state, init_tab[i], init_tab[i + 1]);
+        }
+
+        /* set a dummy symbol rate */
+        stv0297_set_symbolrate(state, 6900);
+
+        /* invert AGC1 polarity */
+        stv0297_writereg_mask(state, 0x88, 0x10, 0x10);
+
+        /* setup bit error counting */
+        stv0297_writereg_mask(state, 0xA0, 0x80, 0x00);
+        stv0297_writereg_mask(state, 0xA0, 0x10, 0x00);
+        stv0297_writereg_mask(state, 0xA0, 0x08, 0x00);
+        stv0297_writereg_mask(state, 0xA0, 0x07, 0x04);
+
+        /* min + max PWM */
+        stv0297_writereg(state, 0x4a, 0x00);
+        stv0297_writereg(state, 0x4b, state->pwm);
+        msleep(200);
+
+        if (state->config->pll_init)
+                state->config->pll_init(fe);
+
+        return 0;
+}
+
+static int stv0297_sleep(struct dvb_frontend *fe)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+
+        stv0297_writereg_mask(state, 0x80, 1, 1);
+
+        return 0;
+}
+
+static int stv0297_read_status(struct dvb_frontend *fe, fe_status_t * status)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+
+        u8 sync = stv0297_readreg(state, 0xDF);
+
+        *status = 0;
+        if (sync & 0x80)
+                *status |=
+                        FE_HAS_SYNC | FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_LOCK;
+        return 0;
+}
+
+static int stv0297_read_ber(struct dvb_frontend *fe, u32 * ber)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+        u8 BER[3];
+
+        stv0297_writereg(state, 0xA0, 0x80);    // Start Counting bit errors for 4096 Bytes
+        mdelay(25);             // Hopefully got 4096 Bytes
+        stv0297_readregs(state, 0xA0, BER, 3);
+        mdelay(25);
+        *ber = (BER[2] << 8 | BER[1]) / (8 * 4096);
+
+        return 0;
+}
+
+
+static int stv0297_read_signal_strength(struct dvb_frontend *fe, u16 * strength)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+        u8 STRENGTH[2];
+
+        stv0297_readregs(state, 0x41, STRENGTH, 2);
+        *strength = (STRENGTH[1] & 0x03) << 8 | STRENGTH[0];
+
+        return 0;
+}
+
+static int stv0297_read_snr(struct dvb_frontend *fe, u16 * snr)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+        u8 SNR[2];
+
+        stv0297_readregs(state, 0x07, SNR, 2);
+        *snr = SNR[1] << 8 | SNR[0];
+
+        return 0;
+}
+
+static int stv0297_read_ucblocks(struct dvb_frontend *fe, u32 * ucblocks)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+
+        *ucblocks = (stv0297_readreg(state, 0xD5) << 8)
+                | stv0297_readreg(state, 0xD4);
+
+        return 0;
+}
+
+static int stv0297_set_frontend(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+        int u_threshold;
+        int initial_u;
+        int blind_u;
+        int delay;
+        int sweeprate;
+        int carrieroffset;
+        unsigned long starttime;
+        unsigned long timeout;
+        fe_spectral_inversion_t inversion;
+
+        switch (p->u.qam.modulation) {
+        case QAM_16:
+        case QAM_32:
+        case QAM_64:
+                delay = 100;
+                sweeprate = 1500;
+                break;
+
+        case QAM_128:
+                delay = 150;
+                sweeprate = 1000;
+                break;
+
+        case QAM_256:
+                delay = 200;
+                sweeprate = 500;
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        // determine inversion dependant parameters
+        inversion = p->inversion;
+        if (state->config->invert)
+                inversion = (inversion == INVERSION_ON) ? INVERSION_OFF : INVERSION_ON;
+        carrieroffset = -330;
+        switch (inversion) {
+        case INVERSION_OFF:
+                break;
+
+        case INVERSION_ON:
+                sweeprate = -sweeprate;
+                carrieroffset = -carrieroffset;
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        stv0297_init(fe);
+        state->config->pll_set(fe, p);
+
+        /* clear software interrupts */
+        stv0297_writereg(state, 0x82, 0x0);
+
+        /* set initial demodulation frequency */
+        stv0297_set_initialdemodfreq(state, 7250);
+
+        /* setup AGC */
+        stv0297_writereg_mask(state, 0x43, 0x10, 0x00);
+        stv0297_writereg(state, 0x41, 0x00);
+        stv0297_writereg_mask(state, 0x42, 0x03, 0x01);
+        stv0297_writereg_mask(state, 0x36, 0x60, 0x00);
+        stv0297_writereg_mask(state, 0x36, 0x18, 0x00);
+        stv0297_writereg_mask(state, 0x71, 0x80, 0x80);
+        stv0297_writereg(state, 0x72, 0x00);
+        stv0297_writereg(state, 0x73, 0x00);
+        stv0297_writereg_mask(state, 0x74, 0x0F, 0x00);
+        stv0297_writereg_mask(state, 0x43, 0x08, 0x00);
+        stv0297_writereg_mask(state, 0x71, 0x80, 0x00);
+
+        /* setup STL */
+        stv0297_writereg_mask(state, 0x5a, 0x20, 0x20);
+        stv0297_writereg_mask(state, 0x5b, 0x02, 0x02);
+        stv0297_writereg_mask(state, 0x5b, 0x02, 0x00);
+        stv0297_writereg_mask(state, 0x5b, 0x01, 0x00);
+        stv0297_writereg_mask(state, 0x5a, 0x40, 0x40);
+
+        /* disable frequency sweep */
+        stv0297_writereg_mask(state, 0x6a, 0x01, 0x00);
+
+        /* reset deinterleaver */
+        stv0297_writereg_mask(state, 0x81, 0x01, 0x01);
+        stv0297_writereg_mask(state, 0x81, 0x01, 0x00);
+
+        /* ??? */
+        stv0297_writereg_mask(state, 0x83, 0x20, 0x20);
+        stv0297_writereg_mask(state, 0x83, 0x20, 0x00);
+
+        /* reset equaliser */
+        u_threshold = stv0297_readreg(state, 0x00) & 0xf;
+        initial_u = stv0297_readreg(state, 0x01) >> 4;
+        blind_u = stv0297_readreg(state, 0x01) & 0xf;
+        stv0297_writereg_mask(state, 0x84, 0x01, 0x01);
+        stv0297_writereg_mask(state, 0x84, 0x01, 0x00);
+        stv0297_writereg_mask(state, 0x00, 0x0f, u_threshold);
+        stv0297_writereg_mask(state, 0x01, 0xf0, initial_u << 4);
+        stv0297_writereg_mask(state, 0x01, 0x0f, blind_u);
+
+        /* data comes from internal A/D */
+        stv0297_writereg_mask(state, 0x87, 0x80, 0x00);
+
+        /* clear phase registers */
+        stv0297_writereg(state, 0x63, 0x00);
+        stv0297_writereg(state, 0x64, 0x00);
+        stv0297_writereg(state, 0x65, 0x00);
+        stv0297_writereg(state, 0x66, 0x00);
+        stv0297_writereg(state, 0x67, 0x00);
+        stv0297_writereg(state, 0x68, 0x00);
+        stv0297_writereg_mask(state, 0x69, 0x0f, 0x00);
+
+        /* set parameters */
+        stv0297_set_qam(state, p->u.qam.modulation);
+        stv0297_set_symbolrate(state, p->u.qam.symbol_rate / 1000);
+        stv0297_set_sweeprate(state, sweeprate, p->u.qam.symbol_rate / 1000);
+        stv0297_set_carrieroffset(state, carrieroffset);
+        stv0297_set_inversion(state, inversion);
+
+        /* kick off lock */
+        stv0297_writereg_mask(state, 0x88, 0x08, 0x08);
+        stv0297_writereg_mask(state, 0x5a, 0x20, 0x00);
+        stv0297_writereg_mask(state, 0x6a, 0x01, 0x01);
+        stv0297_writereg_mask(state, 0x43, 0x40, 0x40);
+        stv0297_writereg_mask(state, 0x5b, 0x30, 0x00);
+        stv0297_writereg_mask(state, 0x03, 0x0c, 0x0c);
+        stv0297_writereg_mask(state, 0x03, 0x03, 0x03);
+        stv0297_writereg_mask(state, 0x43, 0x10, 0x10);
+
+        /* wait for WGAGC lock */
+        starttime = jiffies;
+        timeout = jiffies + (200 * HZ) / 1000;
+        while (time_before(jiffies, timeout)) {
+                msleep(10);
+                if (stv0297_readreg(state, 0x43) & 0x08)
+                        break;
+        }
+        if (time_after(jiffies, timeout)) {
+                goto timeout;
+        }
+        msleep(20);
+
+        /* wait for equaliser partial convergence */
+        timeout = jiffies + (50 * HZ) / 1000;
+        while (time_before(jiffies, timeout)) {
+                msleep(10);
+
+                if (stv0297_readreg(state, 0x82) & 0x04) {
+                        break;
+                }
+        }
+        if (time_after(jiffies, timeout)) {
+                goto timeout;
+        }
+
+        /* wait for equaliser full convergence */
+        timeout = jiffies + (delay * HZ) / 1000;
+        while (time_before(jiffies, timeout)) {
+                msleep(10);
+
+                if (stv0297_readreg(state, 0x82) & 0x08) {
+                        break;
+                }
+        }
+        if (time_after(jiffies, timeout)) {
+                goto timeout;
+        }
+
+        /* disable sweep */
+        stv0297_writereg_mask(state, 0x6a, 1, 0);
+        stv0297_writereg_mask(state, 0x88, 8, 0);
+
+        /* wait for main lock */
+        timeout = jiffies + (20 * HZ) / 1000;
+        while (time_before(jiffies, timeout)) {
+                msleep(10);
+
+                if (stv0297_readreg(state, 0xDF) & 0x80) {
+                        break;
+                }
+        }
+        if (time_after(jiffies, timeout)) {
+                goto timeout;
+        }
+        msleep(100);
+
+        /* is it still locked after that delay? */
+        if (!(stv0297_readreg(state, 0xDF) & 0x80)) {
+                goto timeout;
+        }
+
+        /* success!! */
+        stv0297_writereg_mask(state, 0x5a, 0x40, 0x00);
+        state->base_freq = p->frequency;
+        return 0;
+
+timeout:
+        stv0297_writereg_mask(state, 0x6a, 0x01, 0x00);
+        return 0;
+}
+
+static int stv0297_get_frontend(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+        int reg_00, reg_83;
+
+        reg_00 = stv0297_readreg(state, 0x00);
+        reg_83 = stv0297_readreg(state, 0x83);
+
+        p->frequency = state->base_freq;
+        p->inversion = (reg_83 & 0x08) ? INVERSION_ON : INVERSION_OFF;
+        if (state->config->invert)
+                p->inversion = (p->inversion == INVERSION_ON) ? INVERSION_OFF : INVERSION_ON;
+        p->u.qam.symbol_rate = stv0297_get_symbolrate(state) * 1000;
+        p->u.qam.fec_inner = FEC_NONE;
+
+        switch ((reg_00 >> 4) & 0x7) {
+        case 0:
+                p->u.qam.modulation = QAM_16;
+                break;
+        case 1:
+                p->u.qam.modulation = QAM_32;
+                break;
+        case 2:
+                p->u.qam.modulation = QAM_128;
+                break;
+        case 3:
+                p->u.qam.modulation = QAM_256;
+                break;
+        case 4:
+                p->u.qam.modulation = QAM_64;
+                break;
+        }
+
+        return 0;
+}
+
+static void stv0297_release(struct dvb_frontend *fe)
+{
+        struct stv0297_state *state = (struct stv0297_state *) fe->demodulator_priv;
+        kfree(state);
+}
+
+static struct dvb_frontend_ops stv0297_ops;
+
+struct dvb_frontend *stv0297_attach(const struct stv0297_config *config,
+                                    struct i2c_adapter *i2c, int pwm)
+{
+        struct stv0297_state *state = NULL;
+
+        /* allocate memory for the internal state */
+        state = (struct stv0297_state *) kmalloc(sizeof(struct stv0297_state), GFP_KERNEL);
+        if (state == NULL)
+                goto error;
+
+        /* setup the state */
+        state->config = config;
+        state->i2c = i2c;
+        memcpy(&state->ops, &stv0297_ops, sizeof(struct dvb_frontend_ops));
+        state->base_freq = 0;
+        state->pwm = pwm;
+
+        /* check if the demod is there */
+        if ((stv0297_readreg(state, 0x80) & 0x70) != 0x20)
+                goto error;
+
+        /* create dvb_frontend */
+        state->frontend.ops = &state->ops;
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+        return NULL;
+}
+
+static struct dvb_frontend_ops stv0297_ops = {
+
+        .info = {
+                 .name = "ST STV0297 DVB-C",
+                 .type = FE_QAM,
+                 .frequency_min = 64000000,
+                 .frequency_max = 1300000000,
+                 .frequency_stepsize = 62500,
+                 .symbol_rate_min = 870000,
+                 .symbol_rate_max = 11700000,
+                 .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
+                 FE_CAN_QAM_128 | FE_CAN_QAM_256 | FE_CAN_FEC_AUTO},
+
+        .release = stv0297_release,
+
+        .init = stv0297_init,
+        .sleep = stv0297_sleep,
+
+        .set_frontend = stv0297_set_frontend,
+        .get_frontend = stv0297_get_frontend,
+
+        .read_status = stv0297_read_status,
+        .read_ber = stv0297_read_ber,
+        .read_signal_strength = stv0297_read_signal_strength,
+        .read_snr = stv0297_read_snr,
+        .read_ucblocks = stv0297_read_ucblocks,
+};
+
+MODULE_DESCRIPTION("ST STV0297 DVB-C Demodulator driver");
+MODULE_AUTHOR("Dennis Noermann and Andrew de Quincey");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(stv0297_attach);
+EXPORT_SYMBOL(stv0297_enable_plli2c);