[PATCH] Add Zarlink MT312 DVB-T frontend driver

 - Zarlink MT312 satellite channel decoder driver contributed by Andreas
   Oberritter

drivers/media/dvb/frontends/Kconfig

@@ -93,6 +93,16 @@ config DVB_GRUNDIG_29504_401
 	  DVB adapter simply enable all supported frontends, the 
 	  right one will get autodetected.
 
+config DVB_MT312
+	tristate "Zarlink MT312 Satellite Channel Decoder (QPSK)"
+	depends on DVB_CORE
+	help
+	  A DVB-S tuner module. Say Y when you want to support this frontend.
+
+	  If you don't know what tuner module is soldered on your 
+	  DVB adapter simply enable all supported frontends, the 
+	  right one will get autodetected.
+
 config DVB_VES1820
 	tristate "Frontends with external VES1820 demodulator (QAM)"
 	depends on DVB_CORE

drivers/media/dvb/frontends/Makefile

@@ -12,4 +12,5 @@ obj-$(CONFIG_DVB_ATMEL_AT76C651) += at76c651.o
 obj-$(CONFIG_DVB_CX24110) += cx24110.o
 obj-$(CONFIG_DVB_GRUNDIG_29504_491) += grundig_29504-491.o
 obj-$(CONFIG_DVB_GRUNDIG_29504_401) += grundig_29504-401.o
+obj-$(CONFIG_DVB_MT312) += mt312.o
 obj-$(CONFIG_DVB_VES1820) += ves1820.o

drivers/media/dvb/frontends/mt312.c

+/* 
+    Driver for Zarlink MT312 Satellite Channel Decoder
+
+    Copyright (C) 2003 Andreas Oberritter <obi@saftware.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.
+
+    References:
+    http://products.zarlink.com/product_profiles/MT312.htm
+    http://products.zarlink.com/product_profiles/SL1935.htm
+*/
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "dvb_frontend.h"
+#include "mt312.h"
+
+#define I2C_ADDR_MT312		0x0e
+#define I2C_ADDR_SL1935		0x61
+
+#define MT312_DEBUG		0
+
+#define MT312_SYS_CLK		90000000UL	/* 90 MHz */
+#define MT312_PLL_CLK		10000000UL	/* 10 MHz */
+
+static struct dvb_frontend_info mt312_info = {
+	.name = "Zarlink MT312",
+	.type = FE_QPSK,
+	.frequency_min = 950000,
+	.frequency_max = 2150000,
+	.frequency_stepsize = (MT312_PLL_CLK / 1000) / 128,
+	/*.frequency_tolerance = 29500,         FIXME: binary compatibility waste? */
+	.symbol_rate_min = MT312_SYS_CLK / 128,
+	.symbol_rate_max = MT312_SYS_CLK / 2,
+	/*.symbol_rate_tolerance = 500,         FIXME: binary compatibility waste? 2% */
+	.notifier_delay = 0,
+	.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 |
+	    FE_CAN_CLEAN_SETUP | FE_CAN_MUTE_TS
+};
+
+static int mt312_read(struct dvb_i2c_bus *i2c,
+		      const enum mt312_reg_addr reg, void *buf,
+		      const size_t count)
+{
+	int ret;
+	struct i2c_msg msg[2];
+	u8 regbuf[1] = { reg };
+
+	msg[0].addr = I2C_ADDR_MT312;
+	msg[0].flags = 0;
+	msg[0].buf = regbuf;
+	msg[0].len = 1;
+	msg[1].addr = I2C_ADDR_MT312;
+	msg[1].flags = I2C_M_RD;
+	msg[1].buf = buf;
+	msg[1].len = count;
+
+	ret = i2c->xfer(i2c, msg, 2);
+
+	if (ret != 2) {
+		printk(KERN_ERR "%s: ret == %d\n", __FUNCTION__, ret);
+		return -EREMOTEIO;
+	}
+#ifdef MT312_DEBUG
+	{
+		int i;
+		printk(KERN_INFO "R(%d):", reg & 0x7f);
+		for (i = 0; i < count; i++)
+			printk(" %02x", ((const u8 *) buf)[i]);
+		printk("\n");
+	}
+#endif
+
+	return 0;
+}
+
+static int mt312_write(struct dvb_i2c_bus *i2c,
+		       const enum mt312_reg_addr reg, const void *src,
+		       const size_t count)
+{
+	int ret;
+	u8 buf[count + 1];
+	struct i2c_msg msg;
+
+#ifdef MT312_DEBUG
+	{
+		int i;
+		printk(KERN_INFO "W(%d):", reg & 0x7f);
+		for (i = 0; i < count; i++)
+			printk(" %02x", ((const u8 *) src)[i]);
+		printk("\n");
+	}
+#endif
+
+	buf[0] = reg;
+	memcpy(&buf[1], src, count);
+
+	msg.addr = I2C_ADDR_MT312;
+	msg.flags = 0;
+	msg.buf = buf;
+	msg.len = count + 1;
+
+	ret = i2c->xfer(i2c, &msg, 1);
+
+	if (ret != 1) {
+		printk(KERN_ERR "%s: ret == %d\n", __FUNCTION__, ret);
+		return -EREMOTEIO;
+	}
+
+	return 0;
+}
+
+static inline int mt312_readreg(struct dvb_i2c_bus *i2c,
+				const enum mt312_reg_addr reg, u8 * val)
+{
+	return mt312_read(i2c, reg, val, 1);
+}
+
+static inline int mt312_writereg(struct dvb_i2c_bus *i2c,
+				 const enum mt312_reg_addr reg, const u8 val)
+{
+	return mt312_write(i2c, reg, &val, 1);
+}
+
+static int mt312_pll_write(struct dvb_i2c_bus *i2c, const u8 addr,
+			   u8 * buf, const u8 len)
+{
+	int ret;
+	struct i2c_msg msg;
+
+	msg.addr = addr;
+	msg.flags = 0;
+	msg.buf = buf;
+	msg.len = len;
+
+	if ((ret = mt312_writereg(i2c, GPP_CTRL, 0x40)) < 0)
+		return ret;
+
+	if ((ret = i2c->xfer(i2c, &msg, 1)) != 1)
+		printk(KERN_ERR "%s: i/o error (ret == %d)\n", __FUNCTION__, ret);
+
+	if ((ret = mt312_writereg(i2c, GPP_CTRL, 0x00)) < 0)
+		return ret;
+
+	return 0;
+}
+
+static inline u32 mt312_div(u32 a, u32 b)
+{
+	return (a + (b / 2)) / b;
+}
+
+static int sl1935_set_tv_freq(struct dvb_i2c_bus *i2c, u32 freq, u32 sr)
+{
+	/* 155 uA, Baseband Path B */
+	u8 buf[4] = { 0x00, 0x00, 0x80, 0x00 };
+
+	u8 exp;
+	u32 ref;
+	u32 div;
+
+	if (sr < 10000000) {	/* 1-10 MSym/s: ratio 2 ^ 3 */
+		exp = 3;
+		buf[2] |= 0x40;	/* 690 uA */
+	} else if (sr < 15000000) {	/* 10-15 MSym/s: ratio 2 ^ 4 */
+		exp = 4;
+		buf[2] |= 0x20;	/* 330 uA */
+	} else {		/* 15-45 MSym/s: ratio 2 ^ 7 */
+		exp = 7;
+		buf[3] |= 0x08;	/* Baseband Path A */
+	}
+
+	div = mt312_div(MT312_PLL_CLK, 1 << exp);
+	ref = mt312_div(freq * 1000, div);
+	mt312_info.frequency_stepsize = mt312_div(div, 1000);
+
+	buf[0] = (ref >> 8) & 0x7f;
+	buf[1] = (ref >> 0) & 0xff;
+	buf[2] |= (exp - 1);
+
+	if (freq < 1550000)
+		buf[3] |= 0x10;
+
+	printk(KERN_INFO "synth dword = %02x%02x%02x%02x\n", buf[0],
+	       buf[1], buf[2], buf[3]);
+
+	return mt312_pll_write(i2c, I2C_ADDR_SL1935, buf, sizeof(buf));
+}
+
+static int mt312_reset(struct dvb_i2c_bus *i2c, const u8 full)
+{
+	return mt312_writereg(i2c, RESET, full ? 0x80 : 0x40);
+}
+
+static int mt312_init(struct dvb_i2c_bus *i2c)
+{
+	int ret;
+	u8 buf[2];
+
+	/* wake up */
+	if ((ret = mt312_writereg(i2c, CONFIG, 0x8c)) < 0)
+		return ret;
+
+	/* wait at least 150 usec */
+	udelay(150);
+
+	/* full reset */
+	if ((ret = mt312_reset(i2c, 1)) < 0)
+		return ret;
+
+	/* SYS_CLK */
+	buf[0] = mt312_div(MT312_SYS_CLK * 2, 1000000);
+
+	/* DISEQC_RATIO */
+	buf[1] = mt312_div(MT312_PLL_CLK, 15000 * 4);
+
+	if ((ret = mt312_write(i2c, SYS_CLK, buf, sizeof(buf))) < 0)
+		return ret;
+
+	if ((ret = mt312_writereg(i2c, SNR_THS_HIGH, 0x32)) < 0)
+		return ret;
+
+	/* TS_SW_LIM */
+	buf[0] = 0x8c;
+	buf[1] = 0x98;
+
+	if ((ret = mt312_write(i2c, TS_SW_LIM_L, buf, sizeof(buf))) < 0)
+		return ret;
+
+	if ((ret = mt312_writereg(i2c, CS_SW_LIM, 0x69)) < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_send_master_cmd(struct dvb_i2c_bus *i2c,
+				 const struct dvb_diseqc_master_cmd *c)
+{
+	int ret;
+	u8 diseqc_mode;
+
+	if ((c->msg_len == 0) || (c->msg_len > sizeof(c->msg)))
+		return -EINVAL;
+
+	if ((ret = mt312_readreg(i2c, DISEQC_MODE, &diseqc_mode)) < 0)
+		return ret;
+
+	if ((ret =
+	     mt312_write(i2c, (0x80 | DISEQC_INSTR), c->msg, c->msg_len)) < 0)
+		return ret;
+
+	if ((ret =
+	     mt312_writereg(i2c, DISEQC_MODE,
+			    (diseqc_mode & 0x40) | ((c->msg_len - 1) << 3)
+			    | 0x04)) < 0)
+		return ret;
+
+	/* set DISEQC_MODE[2:0] to zero if a return message is expected */
+	if (c->msg[0] & 0x02)
+		if ((ret =
+		     mt312_writereg(i2c, DISEQC_MODE, (diseqc_mode & 0x40))) < 0)
+			return ret;
+
+	return 0;
+}
+
+static int mt312_recv_slave_reply(struct dvb_i2c_bus *i2c,
+				  struct dvb_diseqc_slave_reply *r)
+{
+	/* TODO */
+	return -EOPNOTSUPP;
+}
+
+static int mt312_send_burst(struct dvb_i2c_bus *i2c, const fe_sec_mini_cmd_t c)
+{
+	const u8 mini_tab[2] = { 0x02, 0x03 };
+
+	int ret;
+	u8 diseqc_mode;
+
+	if (c > SEC_MINI_B)
+		return -EINVAL;
+
+	if ((ret = mt312_readreg(i2c, DISEQC_MODE, &diseqc_mode)) < 0)
+		return ret;
+
+	if ((ret =
+	     mt312_writereg(i2c, DISEQC_MODE,
+			    (diseqc_mode & 0x40) | mini_tab[c])) < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_set_tone(struct dvb_i2c_bus *i2c, const fe_sec_tone_mode_t t)
+{
+	const u8 tone_tab[2] = { 0x01, 0x00 };
+
+	int ret;
+	u8 diseqc_mode;
+
+	if (t > SEC_TONE_OFF)
+		return -EINVAL;
+
+	if ((ret = mt312_readreg(i2c, DISEQC_MODE, &diseqc_mode)) < 0)
+		return ret;
+
+	if ((ret =
+	     mt312_writereg(i2c, DISEQC_MODE,
+			    (diseqc_mode & 0x40) | tone_tab[t])) < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_set_voltage(struct dvb_i2c_bus *i2c, const fe_sec_voltage_t v)
+{
+	const u8 volt_tab[3] = { 0x00, 0x40, 0x00 };
+
+	if (v > SEC_VOLTAGE_OFF)
+		return -EINVAL;
+
+	return mt312_writereg(i2c, DISEQC_MODE, volt_tab[v]);
+}
+
+static int mt312_read_status(struct dvb_i2c_bus *i2c, fe_status_t * s)
+{
+	int ret;
+	u8 status[3];
+
+	*s = 0;
+
+	if ((ret = mt312_read(i2c, QPSK_STAT_H, status, sizeof(status))) < 0)
+		return ret;
+
+	if (status[0] & 0xc0)
+		*s |= FE_HAS_SIGNAL;	/* signal noise ratio */
+	if (status[0] & 0x04)
+		*s |= FE_HAS_CARRIER;	/* qpsk carrier lock */
+	if (status[2] & 0x02)
+		*s |= FE_HAS_VITERBI;	/* viterbi lock */
+	if (status[2] & 0x04)
+		*s |= FE_HAS_SYNC;	/* byte align lock */
+	if (status[0] & 0x01)
+		*s |= FE_HAS_LOCK;	/* qpsk lock */
+
+	return 0;
+}
+
+static int mt312_read_bercnt(struct dvb_i2c_bus *i2c, u32 * ber)
+{
+	int ret;
+	u8 buf[3];
+
+	if ((ret = mt312_read(i2c, RS_BERCNT_H, buf, 3)) < 0)
+		return ret;
+
+	*ber = ((buf[0] << 16) | (buf[1] << 8) | buf[2]) * 64;
+
+	return 0;
+}
+
+static int mt312_read_agc(struct dvb_i2c_bus *i2c, u16 * signal_strength)
+{
+	int ret;
+	u8 buf[3];
+	u16 agc;
+	s16 err_db;
+
+	if ((ret = mt312_read(i2c, AGC_H, buf, sizeof(buf))) < 0)
+		return ret;
+
+	agc = (buf[0] << 6) | (buf[1] >> 2);
+	err_db = (s16) (((buf[1] & 0x03) << 14) | buf[2] << 6) >> 6;
+
+	*signal_strength = agc;
+
+	printk(KERN_DEBUG "agc=%08x err_db=%hd\n", agc, err_db);
+
+	return 0;
+}
+
+static int mt312_read_snr(struct dvb_i2c_bus *i2c, u16 * snr)
+{
+	int ret;
+	u8 buf[2];
+
+	if ((ret = mt312_read(i2c, M_SNR_H, &buf, sizeof(buf))) < 0)
+		return ret;
+
+	*snr = 0xFFFF - ((((buf[0] & 0x7f) << 8) | buf[1]) << 1);
+
+	return 0;
+}
+
+static int mt312_read_ubc(struct dvb_i2c_bus *i2c, u32 * ubc)
+{
+	int ret;
+	u8 buf[2];
+
+	if ((ret = mt312_read(i2c, RS_UBC_H, &buf, sizeof(buf))) < 0)
+		return ret;
+
+	*ubc = (buf[0] << 8) | buf[1];
+
+	return 0;
+}
+
+static int mt312_set_frontend(struct dvb_i2c_bus *i2c,
+			      const struct dvb_frontend_parameters *p)
+{
+	int ret;
+	u8 buf[5];
+	u16 sr;
+
+	const u8 fec_tab[10] =
+	    { 0x00, 0x01, 0x02, 0x04, 0x3f, 0x08, 0x10, 0x20, 0x3f, 0x3f };
+	const u8 inv_tab[3] = { 0x00, 0x40, 0x80 };
+
+	if ((p->frequency < mt312_info.frequency_min)
+	    || (p->frequency > mt312_info.frequency_max))
+		return -EINVAL;
+
+	if ((p->inversion < INVERSION_OFF)
+	    || (p->inversion > INVERSION_AUTO))
+		return -EINVAL;
+
+	if ((p->u.qpsk.symbol_rate < mt312_info.symbol_rate_min)
+	    || (p->u.qpsk.symbol_rate > mt312_info.symbol_rate_max))
+		return -EINVAL;
+
+	if ((p->u.qpsk.fec_inner < FEC_NONE)
+	    || (p->u.qpsk.fec_inner > FEC_AUTO))
+		return -EINVAL;
+
+	if ((p->u.qpsk.fec_inner == FEC_4_5)
+	    || (p->u.qpsk.fec_inner == FEC_8_9))
+		return -EINVAL;
+
+	if ((ret =
+	     sl1935_set_tv_freq(i2c, p->frequency, p->u.qpsk.symbol_rate)) < 0)
+		return ret;
+
+	/* sr = (u16)(sr * 256.0 / 1000000.0) */
+	sr = mt312_div(p->u.qpsk.symbol_rate * 4, 15625);
+
+	/* SYM_RATE */
+	buf[0] = (sr >> 8) & 0x3f;
+	buf[1] = (sr >> 0) & 0xff;
+
+	/* VIT_MODE */
+	buf[2] = inv_tab[p->inversion] | fec_tab[p->u.qpsk.fec_inner];
+
+	/* QPSK_CTRL */
+	buf[3] = 0x40;		/* swap I and Q before QPSK demodulation */
+
+	if (p->u.qpsk.symbol_rate < 10000000)
+		buf[3] |= 0x04;	/* use afc mode */
+
+	/* GO */
+	buf[4] = 0x01;
+
+	if ((ret = mt312_write(i2c, SYM_RATE_H, buf, sizeof(buf))) < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_get_inversion(struct dvb_i2c_bus *i2c,
+			       fe_spectral_inversion_t * i)
+{
+	int ret;
+	u8 vit_mode;
+
+	if ((ret = mt312_readreg(i2c, VIT_MODE, &vit_mode)) < 0)
+		return ret;
+
+	if (vit_mode & 0x80)	/* auto inversion was used */
+		*i = (vit_mode & 0x40) ? INVERSION_ON : INVERSION_OFF;
+
+	return 0;
+}
+
+static int mt312_get_symbol_rate(struct dvb_i2c_bus *i2c, u32 * sr)
+{
+	int ret;
+	u8 sym_rate_h;
+	u8 dec_ratio;
+	u16 sym_rat_op;
+	u16 monitor;
+	u8 buf[2];
+
+	if ((ret = mt312_readreg(i2c, SYM_RATE_H, &sym_rate_h)) < 0)
+		return ret;
+
+	if (sym_rate_h & 0x80) {	/* symbol rate search was used */
+		if ((ret = mt312_writereg(i2c, MON_CTRL, 0x03)) < 0)
+			return ret;
+
+		if ((ret = mt312_read(i2c, MONITOR_H, buf, sizeof(buf))) < 0)
+			return ret;
+
+		monitor = (buf[0] << 8) | buf[1];
+
+		printk(KERN_DEBUG "sr(auto) = %u\n",
+		       mt312_div(monitor * 15625, 4));
+	} else {
+		if ((ret = mt312_writereg(i2c, MON_CTRL, 0x05)) < 0)
+			return ret;
+
+		if ((ret = mt312_read(i2c, MONITOR_H, buf, sizeof(buf))) < 0)
+			return ret;
+
+		dec_ratio = ((buf[0] >> 5) & 0x07) * 32;
+
+		if ((ret = mt312_read(i2c, SYM_RAT_OP_H, buf, sizeof(buf))) < 0)
+			return ret;
+
+		sym_rat_op = (buf[0] << 8) | buf[1];
+
+		printk(KERN_DEBUG "sym_rat_op=%d dec_ratio=%d\n",
+		       sym_rat_op, dec_ratio);
+		printk(KERN_DEBUG "*sr(manual) = %lu\n",
+		       (((MT312_PLL_CLK * 8192) / (sym_rat_op + 8192)) *
+			2) - dec_ratio);
+	}
+
+	return 0;
+}
+
+static int mt312_get_code_rate(struct dvb_i2c_bus *i2c, fe_code_rate_t * cr)
+{
+	const fe_code_rate_t fec_tab[8] =
+	    { FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_6_7, FEC_7_8,
+		FEC_AUTO,
+		FEC_AUTO
+	};
+
+	int ret;
+	u8 fec_status;
+
+	if ((ret = mt312_readreg(i2c, FEC_STATUS, &fec_status)) < 0)
+		return ret;
+
+	*cr = fec_tab[(fec_status >> 4) & 0x07];
+
+	return 0;
+}
+
+static int mt312_get_frontend(struct dvb_i2c_bus *i2c,
+			      struct dvb_frontend_parameters *p)
+{
+	int ret;
+
+	if ((ret = mt312_get_inversion(i2c, &p->inversion)) < 0)
+		return ret;
+
+	if ((ret = mt312_get_symbol_rate(i2c, &p->u.qpsk.symbol_rate)) < 0)
+		return ret;
+
+	if ((ret = mt312_get_code_rate(i2c, &p->u.qpsk.fec_inner)) < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_sleep(struct dvb_i2c_bus *i2c)
+{
+	int ret;
+	u8 config;
+
+	/* reset all registers to defaults */
+	if ((ret = mt312_reset(i2c, 1)) < 0)
+		return ret;
+
+	if ((ret = mt312_readreg(i2c, CONFIG, &config)) < 0)
+		return ret;
+
+	/* enter standby */
+	if ((ret = mt312_writereg(i2c, CONFIG, config & 0x7f)) < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_ioctl(struct dvb_frontend *fe, unsigned int cmd, void *arg)
+{
+	struct dvb_i2c_bus *i2c = fe->i2c;
+
+	switch (cmd) {
+	case FE_GET_INFO:
+		memcpy(arg, &mt312_info, sizeof(struct dvb_frontend_info));
+		break;
+
+	case FE_DISEQC_RESET_OVERLOAD:
+		return -EOPNOTSUPP;
+
+	case FE_DISEQC_SEND_MASTER_CMD:
+		return mt312_send_master_cmd(i2c, arg);
+
+	case FE_DISEQC_RECV_SLAVE_REPLY:
+		if ((long) fe->data == ID_MT312)
+			return mt312_recv_slave_reply(i2c, arg);
+		else
+			return -EOPNOTSUPP;
+
+	case FE_DISEQC_SEND_BURST:
+		return mt312_send_burst(i2c, (fe_sec_mini_cmd_t) arg);
+
+	case FE_SET_TONE:
+		return mt312_set_tone(i2c, (fe_sec_tone_mode_t) arg);
+
+	case FE_SET_VOLTAGE:
+		return mt312_set_voltage(i2c, (fe_sec_voltage_t) arg);
+
+	case FE_ENABLE_HIGH_LNB_VOLTAGE:
+		return -EOPNOTSUPP;
+
+	case FE_READ_STATUS:
+		return mt312_read_status(i2c, arg);
+
+	case FE_READ_BER:
+		return mt312_read_bercnt(i2c, arg);
+
+	case FE_READ_SIGNAL_STRENGTH:
+		return mt312_read_agc(i2c, arg);
+
+	case FE_READ_SNR:
+		return mt312_read_snr(i2c, arg);
+
+	case FE_READ_UNCORRECTED_BLOCKS:
+		return mt312_read_ubc(i2c, arg);
+
+	case FE_SET_FRONTEND:
+		return mt312_set_frontend(i2c, arg);
+
+	case FE_GET_FRONTEND:
+		return mt312_get_frontend(i2c, arg);
+
+	case FE_GET_EVENT:
+		return -EOPNOTSUPP;
+
+	case FE_SLEEP:
+		return mt312_sleep(i2c);
+
+	case FE_INIT:
+		return mt312_init(i2c);
+
+	case FE_RESET:
+		return mt312_reset(i2c, 0);
+
+	default:
+		return -ENOIOCTLCMD;
+	}
+
+	return 0;
+}
+
+static int mt312_attach(struct dvb_i2c_bus *i2c)
+{
+	int ret;
+	u8 id;
+
+	if ((ret = mt312_readreg(i2c, ID, &id)) < 0)
+		return ret;
+
+	if ((id != ID_VP310) && (id != ID_MT312))
+		return -ENODEV;
+
+	return dvb_register_frontend(mt312_ioctl, i2c, (void *) (long) id,
+				     &mt312_info);
+}
+
+static void mt312_detach(struct dvb_i2c_bus *i2c)
+{
+	dvb_unregister_frontend(mt312_ioctl, i2c);
+}
+
+static int __init mt312_module_init(void)
+{
+	return dvb_register_i2c_device(THIS_MODULE, mt312_attach, mt312_detach);
+}
+
+static void __exit mt312_module_exit(void)
+{
+	dvb_unregister_i2c_device(mt312_attach);
+}
+
+module_init(mt312_module_init);
+module_exit(mt312_module_exit);
+
+MODULE_DESCRIPTION("MT312 Satellite Channel Decoder Driver");
+MODULE_AUTHOR("Andreas Oberritter <obi@saftware.de>");
+MODULE_LICENSE("GPL");

drivers/media/dvb/frontends/mt312.h

+/* 
+    Driver for Zarlink MT312 QPSK Frontend
+
+    Copyright (C) 2003 Andreas Oberritter <obi@saftware.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.
+
+*/
+
+#ifndef _DVB_FRONTENDS_MT312
+#define _DVB_FRONTENDS_MT312
+
+enum mt312_reg_addr {
+	QPSK_INT_H = 0,
+	QPSK_INT_M = 1,
+	QPSK_INT_L = 2,
+	FEC_INT = 3,
+	QPSK_STAT_H = 4,
+	QPSK_STAT_L = 5,
+	FEC_STATUS = 6,
+	LNB_FREQ_H = 7,
+	LNB_FREQ_L = 8,
+	M_SNR_H = 9,
+	M_SNR_L = 10,
+	VIT_ERRCNT_H = 11,
+	VIT_ERRCNT_M = 12,
+	VIT_ERRCNT_L = 13,
+	RS_BERCNT_H = 14,
+	RS_BERCNT_M = 15,
+	RS_BERCNT_L = 16,
+	RS_UBC_H = 17,
+	RS_UBC_L = 18,
+	SIG_LEVEL = 19,
+	GPP_CTRL = 20,
+	RESET = 21,
+	DISEQC_MODE = 22,
+	SYM_RATE_H = 23,
+	SYM_RATE_L = 24,
+	VIT_MODE = 25,
+	QPSK_CTRL = 26,
+	GO = 27,
+	IE_QPSK_H = 28,
+	IE_QPSK_M = 29,
+	IE_QPSK_L = 30,
+	IE_FEC = 31,
+	QPSK_STAT_EN = 32,
+	FEC_STAT_EN = 33,
+	SYS_CLK = 34,
+	DISEQC_RATIO = 35,
+	DISEQC_INSTR = 36,
+	FR_LIM = 37,
+	FR_OFF = 38,
+	AGC_CTRL = 39,
+	AGC_INIT = 40,
+	AGC_REF = 41,
+	AGC_MAX = 42,
+	AGC_MIN = 43,
+	AGC_LK_TH = 44,
+	TS_AGC_LK_TH = 45,
+	AGC_PWR_SET = 46,
+	QPSK_MISC = 47,
+	SNR_THS_LOW = 48,
+	SNR_THS_HIGH = 49,
+	TS_SW_RATE = 50,
+	TS_SW_LIM_L = 51,
+	TS_SW_LIM_H = 52,
+	CS_SW_RATE_1 = 53,
+	CS_SW_RATE_2 = 54,
+	CS_SW_RATE_3 = 55,
+	CS_SW_RATE_4 = 56,
+	CS_SW_LIM = 57,
+	TS_LPK = 58,
+	TS_LPK_M = 59,
+	TS_LPK_L = 60,
+	CS_KPROP_H = 61,
+	CS_KPROP_L = 62,
+	CS_KINT_H = 63,
+	CS_KINT_L = 64,
+	QPSK_SCALE = 65,
+	TLD_OUTCLK_TH = 66,
+	TLD_INCLK_TH = 67,
+	FLD_TH = 68,
+	PLD_OUTLK3 = 69,
+	PLD_OUTLK2 = 70,
+	PLD_OUTLK1 = 71,
+	PLD_OUTLK0 = 72,
+	PLD_INLK3 = 73,
+	PLD_INLK2 = 74,
+	PLD_INLK1 = 75,
+	PLD_INLK0 = 76,
+	PLD_ACC_TIME = 77,
+	SWEEP_PAR = 78,
+	STARTUP_TIME = 79,
+	LOSSLOCK_TH = 80,
+	FEC_LOCK_TM = 81,
+	LOSSLOCK_TM = 82,
+	VIT_ERRPER_H = 83,
+	VIT_ERRPER_M = 84,
+	VIT_ERRPER_L = 85,
+	VIT_SETUP = 86,
+	VIT_REF0 = 87,
+	VIT_REF1 = 88,
+	VIT_REF2 = 89,
+	VIT_REF3 = 90,
+	VIT_REF4 = 91,
+	VIT_REF5 = 92,
+	VIT_REF6 = 93,
+	VIT_MAXERR = 94,
+	BA_SETUPT = 95,
+	OP_CTRL = 96,
+	FEC_SETUP = 97,
+	PROG_SYNC = 98,
+	AFC_SEAR_TH = 99,
+	CSACC_DIF_TH = 100,
+	QPSK_LK_CT = 101,
+	QPSK_ST_CT = 102,
+	MON_CTRL = 103,
+	QPSK_RESET = 104,
+	QPSK_TST_CT = 105,
+	QPSK_TST_ST = 106,
+	TEST_R = 107,
+	AGC_H = 108,
+	AGC_M = 109,
+	AGC_L = 110,
+	FREQ_ERR1_H = 111,
+	FREQ_ERR1_M = 112,
+	FREQ_ERR1_L = 113,
+	FREQ_ERR2_H = 114,
+	FREQ_ERR2_L = 115,
+	SYM_RAT_OP_H = 116,
+	SYM_RAT_OP_L = 117,
+	DESEQC2_INT = 118,
+	DISEQC2_STAT = 119,
+	DISEQC2_FIFO = 120,
+	DISEQC2_CTRL1 = 121,
+	DISEQC2_CTRL2 = 122,
+	MONITOR_H = 123,
+	MONITOR_L = 124,
+	TEST_MODE = 125,
+	ID = 126,
+	CONFIG = 127
+};
+
+enum mt312_model_id {
+	ID_VP310 = 1,
+	ID_MT312 = 3
+};
+
+#endif				/* DVB_FRONTENDS_MT312 */