Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:
 "The first part of the media updates for Kernel 3.7.

  This series contain:

   - A major tree renaming patch series: now, drivers are organized
     internally by their used bus, instead of by V4L2 and/or DVB API,
     providing a cleaner driver location for hybrid drivers that
     implement both APIs, and allowing to cleanup the Kconfig items and
     make them more intuitive for the end user;

   - Media Kernel developers are typically very lazy with their duties
     of keeping the MAINTAINERS entries for their drivers updated.  As
     now the tree is more organized, we're doing an effort to add/update
     those entries for the drivers that aren't currently orphan;

   - Several DVB USB drivers got moved to a new DVB USB v2 core; the new
     core fixes several bugs (as the existing one that got bitroted).
     Now, suspend/resume finally started to work fine (at least with
     some devices - we should expect more work with regards to it);

   - added multistream support for DVB-T2, and unified the API for
     DVB-S2 and ISDB-S.  Backward binary support is preserved;

   - as usual, a few new drivers, some V4L2 core improvements and lots
     of drivers improvements and fixes.

  There are some points to notice on this series:

   1) you should expect a trivial merge conflict on your tree, with the
      removal of Documentation/feature-removal-schedule.txt: this series
      would be adding two additional entries there.  I opted to not
      rebase it due to this recent change;

   2) With regards to the PCTV 520e udev-related breakage, I opted to
      fix it in a way that the patches can be backported to 3.5 even
      without your firmware fix patch.  This way, Greg doesn't need to
      rush backporting your patch (as there are still the firmware cache
      and firmware path customization issues to be addressed there).

      I'll send later a patch (likely after the end of the merge window)
      reverting the rest of the DRX-K async firmware request, fully
      restoring its original behaviour to allow media drivers to
      initialize everything serialized as before for 3.7 and upper.

   3) I'm planning to work on this weekend to test the DMABUF patches
      for V4L2.  The patches are on my queue for several Kernel cycles,
      but, up to now, there is/was no way to test the series locally.

      I have some concerns about this particular changeset with regards
      to security issues, and with regards to the replacement of the old
      VIDIOC_OVERLAY ioctl's that is broken on modern systems, due to
      GPU drivers change.  The Overlay API allows direct PCI2PCI
      transfers from a media capture card into the GPU framebuffer, but
      its API is crappy.  Also, the only existing X11 driver that
      implements it requires a XV extension that is not available
      anymore on modern drivers.  The DMABUF can do the same thing, but
      with it is promising to be a properly-designed API.  If I can
      successfully test this series and be happy with it, I should be
      asking you to pull them next week."

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (717 commits)
  em28xx: regression fix: use DRX-K sync firmware requests on em28xx
  drxk: allow loading firmware synchrousnously
  em28xx: Make all em28xx extensions to be initialized asynchronously
  [media] tda18271: properly report read errors in tda18271_get_id
  [media] tda18271: delay IR & RF calibration until init() if delay_cal is set
  [media] MAINTAINERS: add Michael Krufky as tda827x maintainer
  [media] MAINTAINERS: add Michael Krufky as tda8290 maintainer
  [media] MAINTAINERS: add Michael Krufky as cxusb maintainer
  [media] MAINTAINERS: add Michael Krufky as lg2160 maintainer
  [media] MAINTAINERS: add Michael Krufky as lgdt3305 maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl111sf maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl5007t maintainer
  [media] MAINTAINERS: add Michael Krufky as tda18271 maintainer
  [media] s5p-tv: Report only multi-plane capabilities in vidioc_querycap
  [media] s5p-mfc: Fix misplaced return statement in s5p_mfc_suspend()
  [media] exynos-gsc: Add missing static storage class specifiers
  [media] exynos-gsc: Remove <linux/version.h> header file inclusion
  [media] s5p-fimc: Fix incorrect condition in fimc_lite_reqbufs()
  [media] s5p-tv: Fix potential NULL pointer dereference error
  [media] s5k6aa: Fix possible NULL pointer dereference
  ...

1 files changed, 839 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/mt312.c b/drivers/media/dvb-frontends/mt312.c
new file mode 100644
index 00000000000..e20bf13aa86
--- /dev/null
+++ b/drivers/media/dvb-frontends/mt312.c
@@ -0,0 +1,839 @@
+/*
+    Driver for Zarlink VP310/MT312/ZL10313 Satellite Channel Decoder
+
+    Copyright (C) 2003 Andreas Oberritter <obi@linuxtv.org>
+    Copyright (C) 2008 Matthias Schwarzott <zzam@gentoo.org>
+
+    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 <linux/string.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "mt312_priv.h"
+#include "mt312.h"
+
+
+struct mt312_state {
+	struct i2c_adapter *i2c;
+	/* configuration settings */
+	const struct mt312_config *config;
+	struct dvb_frontend frontend;
+
+	u8 id;
+	unsigned long xtal;
+	u8 freq_mult;
+};
+
+static int debug;
+#define dprintk(args...) \
+	do { \
+		if (debug) \
+			printk(KERN_DEBUG "mt312: " args); \
+	} while (0)
+
+#define MT312_PLL_CLK		10000000UL	/* 10 MHz */
+#define MT312_PLL_CLK_10_111	10111000UL	/* 10.111 MHz */
+
+static int mt312_read(struct mt312_state *state, const enum mt312_reg_addr reg,
+		      u8 *buf, const size_t count)
+{
+	int ret;
+	struct i2c_msg msg[2];
+	u8 regbuf[1] = { reg };
+
+	msg[0].addr = state->config->demod_address;
+	msg[0].flags = 0;
+	msg[0].buf = regbuf;
+	msg[0].len = 1;
+	msg[1].addr = state->config->demod_address;
+	msg[1].flags = I2C_M_RD;
+	msg[1].buf = buf;
+	msg[1].len = count;
+
+	ret = i2c_transfer(state->i2c, msg, 2);
+
+	if (ret != 2) {
+		printk(KERN_DEBUG "%s: ret == %d\n", __func__, ret);
+		return -EREMOTEIO;
+	}
+
+	if (debug) {
+		int i;
+		dprintk("R(%d):", reg & 0x7f);
+		for (i = 0; i < count; i++)
+			printk(KERN_CONT " %02x", buf[i]);
+		printk("\n");
+	}
+
+	return 0;
+}
+
+static int mt312_write(struct mt312_state *state, const enum mt312_reg_addr reg,
+		       const u8 *src, const size_t count)
+{
+	int ret;
+	u8 buf[count + 1];
+	struct i2c_msg msg;
+
+	if (debug) {
+		int i;
+		dprintk("W(%d):", reg & 0x7f);
+		for (i = 0; i < count; i++)
+			printk(KERN_CONT " %02x", src[i]);
+		printk("\n");
+	}
+
+	buf[0] = reg;
+	memcpy(&buf[1], src, count);
+
+	msg.addr = state->config->demod_address;
+	msg.flags = 0;
+	msg.buf = buf;
+	msg.len = count + 1;
+
+	ret = i2c_transfer(state->i2c, &msg, 1);
+
+	if (ret != 1) {
+		dprintk("%s: ret == %d\n", __func__, ret);
+		return -EREMOTEIO;
+	}
+
+	return 0;
+}
+
+static inline int mt312_readreg(struct mt312_state *state,
+				const enum mt312_reg_addr reg, u8 *val)
+{
+	return mt312_read(state, reg, val, 1);
+}
+
+static inline int mt312_writereg(struct mt312_state *state,
+				 const enum mt312_reg_addr reg, const u8 val)
+{
+	return mt312_write(state, reg, &val, 1);
+}
+
+static inline u32 mt312_div(u32 a, u32 b)
+{
+	return (a + (b / 2)) / b;
+}
+
+static int mt312_reset(struct mt312_state *state, const u8 full)
+{
+	return mt312_writereg(state, RESET, full ? 0x80 : 0x40);
+}
+
+static int mt312_get_inversion(struct mt312_state *state,
+			       fe_spectral_inversion_t *i)
+{
+	int ret;
+	u8 vit_mode;
+
+	ret = mt312_readreg(state, VIT_MODE, &vit_mode);
+	if (ret < 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 mt312_state *state, u32 *sr)
+{
+	int ret;
+	u8 sym_rate_h;
+	u8 dec_ratio;
+	u16 sym_rat_op;
+	u16 monitor;
+	u8 buf[2];
+
+	ret = mt312_readreg(state, SYM_RATE_H, &sym_rate_h);
+	if (ret < 0)
+		return ret;
+
+	if (sym_rate_h & 0x80) {
+		/* symbol rate search was used */
+		ret = mt312_writereg(state, MON_CTRL, 0x03);
+		if (ret < 0)
+			return ret;
+
+		ret = mt312_read(state, MONITOR_H, buf, sizeof(buf));
+		if (ret < 0)
+			return ret;
+
+		monitor = (buf[0] << 8) | buf[1];
+
+		dprintk("sr(auto) = %u\n",
+		       mt312_div(monitor * 15625, 4));
+	} else {
+		ret = mt312_writereg(state, MON_CTRL, 0x05);
+		if (ret < 0)
+			return ret;
+
+		ret = mt312_read(state, MONITOR_H, buf, sizeof(buf));
+		if (ret < 0)
+			return ret;
+
+		dec_ratio = ((buf[0] >> 5) & 0x07) * 32;
+
+		ret = mt312_read(state, SYM_RAT_OP_H, buf, sizeof(buf));
+		if (ret < 0)
+			return ret;
+
+		sym_rat_op = (buf[0] << 8) | buf[1];
+
+		dprintk("sym_rat_op=%d dec_ratio=%d\n",
+		       sym_rat_op, dec_ratio);
+		dprintk("*sr(manual) = %lu\n",
+		       (((state->xtal * 8192) / (sym_rat_op + 8192)) *
+			2) - dec_ratio);
+	}
+
+	return 0;
+}
+
+static int mt312_get_code_rate(struct mt312_state *state, 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;
+
+	ret = mt312_readreg(state, FEC_STATUS, &fec_status);
+	if (ret < 0)
+		return ret;
+
+	*cr = fec_tab[(fec_status >> 4) & 0x07];
+
+	return 0;
+}
+
+static int mt312_initfe(struct dvb_frontend *fe)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+
+	/* wake up */
+	ret = mt312_writereg(state, CONFIG,
+			(state->freq_mult == 6 ? 0x88 : 0x8c));
+	if (ret < 0)
+		return ret;
+
+	/* wait at least 150 usec */
+	udelay(150);
+
+	/* full reset */
+	ret = mt312_reset(state, 1);
+	if (ret < 0)
+		return ret;
+
+/* Per datasheet, write correct values. 09/28/03 ACCJr.
+ * If we don't do this, we won't get FE_HAS_VITERBI in the VP310. */
+	{
+		u8 buf_def[8] = { 0x14, 0x12, 0x03, 0x02,
+				  0x01, 0x00, 0x00, 0x00 };
+
+		ret = mt312_write(state, VIT_SETUP, buf_def, sizeof(buf_def));
+		if (ret < 0)
+			return ret;
+	}
+
+	switch (state->id) {
+	case ID_ZL10313:
+		/* enable ADC */
+		ret = mt312_writereg(state, GPP_CTRL, 0x80);
+		if (ret < 0)
+			return ret;
+
+		/* configure ZL10313 for optimal ADC performance */
+		buf[0] = 0x80;
+		buf[1] = 0xB0;
+		ret = mt312_write(state, HW_CTRL, buf, 2);
+		if (ret < 0)
+			return ret;
+
+		/* enable MPEG output and ADCs */
+		ret = mt312_writereg(state, HW_CTRL, 0x00);
+		if (ret < 0)
+			return ret;
+
+		ret = mt312_writereg(state, MPEG_CTRL, 0x00);
+		if (ret < 0)
+			return ret;
+
+		break;
+	}
+
+	/* SYS_CLK */
+	buf[0] = mt312_div(state->xtal * state->freq_mult * 2, 1000000);
+
+	/* DISEQC_RATIO */
+	buf[1] = mt312_div(state->xtal, 22000 * 4);
+
+	ret = mt312_write(state, SYS_CLK, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_writereg(state, SNR_THS_HIGH, 0x32);
+	if (ret < 0)
+		return ret;
+
+	/* different MOCLK polarity */
+	switch (state->id) {
+	case ID_ZL10313:
+		buf[0] = 0x33;
+		break;
+	default:
+		buf[0] = 0x53;
+		break;
+	}
+
+	ret = mt312_writereg(state, OP_CTRL, buf[0]);
+	if (ret < 0)
+		return ret;
+
+	/* TS_SW_LIM */
+	buf[0] = 0x8c;
+	buf[1] = 0x98;
+
+	ret = mt312_write(state, TS_SW_LIM_L, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_writereg(state, CS_SW_LIM, 0x69);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_send_master_cmd(struct dvb_frontend *fe,
+				 struct dvb_diseqc_master_cmd *c)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 diseqc_mode;
+
+	if ((c->msg_len == 0) || (c->msg_len > sizeof(c->msg)))
+		return -EINVAL;
+
+	ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_write(state, (0x80 | DISEQC_INSTR), c->msg, c->msg_len);
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_writereg(state, DISEQC_MODE,
+			     (diseqc_mode & 0x40) | ((c->msg_len - 1) << 3)
+			     | 0x04);
+	if (ret < 0)
+		return ret;
+
+	/* is there a better way to wait for message to be transmitted */
+	msleep(100);
+
+	/* set DISEQC_MODE[2:0] to zero if a return message is expected */
+	if (c->msg[0] & 0x02) {
+		ret = mt312_writereg(state, DISEQC_MODE, (diseqc_mode & 0x40));
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mt312_send_burst(struct dvb_frontend *fe, const fe_sec_mini_cmd_t c)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	const u8 mini_tab[2] = { 0x02, 0x03 };
+
+	int ret;
+	u8 diseqc_mode;
+
+	if (c > SEC_MINI_B)
+		return -EINVAL;
+
+	ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_writereg(state, DISEQC_MODE,
+			     (diseqc_mode & 0x40) | mini_tab[c]);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_set_tone(struct dvb_frontend *fe, const fe_sec_tone_mode_t t)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	const u8 tone_tab[2] = { 0x01, 0x00 };
+
+	int ret;
+	u8 diseqc_mode;
+
+	if (t > SEC_TONE_OFF)
+		return -EINVAL;
+
+	ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_writereg(state, DISEQC_MODE,
+			     (diseqc_mode & 0x40) | tone_tab[t]);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_set_voltage(struct dvb_frontend *fe, const fe_sec_voltage_t v)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	const u8 volt_tab[3] = { 0x00, 0x40, 0x00 };
+	u8 val;
+
+	if (v > SEC_VOLTAGE_OFF)
+		return -EINVAL;
+
+	val = volt_tab[v];
+	if (state->config->voltage_inverted)
+		val ^= 0x40;
+
+	return mt312_writereg(state, DISEQC_MODE, val);
+}
+
+static int mt312_read_status(struct dvb_frontend *fe, fe_status_t *s)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 status[3];
+
+	*s = 0;
+
+	ret = mt312_read(state, QPSK_STAT_H, status, sizeof(status));
+	if (ret < 0)
+		return ret;
+
+	dprintk("QPSK_STAT_H: 0x%02x, QPSK_STAT_L: 0x%02x,"
+		" FEC_STATUS: 0x%02x\n", status[0], status[1], status[2]);
+
+	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_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[3];
+
+	ret = mt312_read(state, RS_BERCNT_H, buf, 3);
+	if (ret < 0)
+		return ret;
+
+	*ber = ((buf[0] << 16) | (buf[1] << 8) | buf[2]) * 64;
+
+	return 0;
+}
+
+static int mt312_read_signal_strength(struct dvb_frontend *fe,
+				      u16 *signal_strength)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[3];
+	u16 agc;
+	s16 err_db;
+
+	ret = mt312_read(state, AGC_H, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	agc = (buf[0] << 6) | (buf[1] >> 2);
+	err_db = (s16) (((buf[1] & 0x03) << 14) | buf[2] << 6) >> 6;
+
+	*signal_strength = agc;
+
+	dprintk("agc=%08x err_db=%hd\n", agc, err_db);
+
+	return 0;
+}
+
+static int mt312_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+
+	ret = mt312_read(state, M_SNR_H, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	*snr = 0xFFFF - ((((buf[0] & 0x7f) << 8) | buf[1]) << 1);
+
+	return 0;
+}
+
+static int mt312_read_ucblocks(struct dvb_frontend *fe, u32 *ubc)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[2];
+
+	ret = mt312_read(state, RS_UBC_H, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	*ubc = (buf[0] << 8) | buf[1];
+
+	return 0;
+}
+
+static int mt312_set_frontend(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[5], config_val;
+	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 };
+
+	dprintk("%s: Freq %d\n", __func__, p->frequency);
+
+	if ((p->frequency < fe->ops.info.frequency_min)
+	    || (p->frequency > fe->ops.info.frequency_max))
+		return -EINVAL;
+
+	if ((p->inversion < INVERSION_OFF)
+	    || (p->inversion > INVERSION_ON))
+		return -EINVAL;
+
+	if ((p->symbol_rate < fe->ops.info.symbol_rate_min)
+	    || (p->symbol_rate > fe->ops.info.symbol_rate_max))
+		return -EINVAL;
+
+	if ((p->fec_inner < FEC_NONE)
+	    || (p->fec_inner > FEC_AUTO))
+		return -EINVAL;
+
+	if ((p->fec_inner == FEC_4_5)
+	    || (p->fec_inner == FEC_8_9))
+		return -EINVAL;
+
+	switch (state->id) {
+	case ID_VP310:
+	/* For now we will do this only for the VP310.
+	 * It should be better for the mt312 as well,
+	 * but tuning will be slower. ACCJr 09/29/03
+	 */
+		ret = mt312_readreg(state, CONFIG, &config_val);
+		if (ret < 0)
+			return ret;
+		if (p->symbol_rate >= 30000000) {
+			/* Note that 30MS/s should use 90MHz */
+			if (state->freq_mult == 6) {
+				/* We are running 60MHz */
+				state->freq_mult = 9;
+				ret = mt312_initfe(fe);
+				if (ret < 0)
+					return ret;
+			}
+		} else {
+			if (state->freq_mult == 9) {
+				/* We are running 90MHz */
+				state->freq_mult = 6;
+				ret = mt312_initfe(fe);
+				if (ret < 0)
+					return ret;
+			}
+		}
+		break;
+
+	case ID_MT312:
+	case ID_ZL10313:
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	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);
+	}
+
+	/* sr = (u16)(sr * 256.0 / 1000000.0) */
+	sr = mt312_div(p->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->fec_inner];
+
+	/* QPSK_CTRL */
+	buf[3] = 0x40;		/* swap I and Q before QPSK demodulation */
+
+	if (p->symbol_rate < 10000000)
+		buf[3] |= 0x04;	/* use afc mode */
+
+	/* GO */
+	buf[4] = 0x01;
+
+	ret = mt312_write(state, SYM_RATE_H, buf, sizeof(buf));
+	if (ret < 0)
+		return ret;
+
+	mt312_reset(state, 0);
+
+	return 0;
+}
+
+static int mt312_get_frontend(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+
+	ret = mt312_get_inversion(state, &p->inversion);
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_get_symbol_rate(state, &p->symbol_rate);
+	if (ret < 0)
+		return ret;
+
+	ret = mt312_get_code_rate(state, &p->fec_inner);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+
+	u8 val = 0x00;
+	int ret;
+
+	switch (state->id) {
+	case ID_ZL10313:
+		ret = mt312_readreg(state, GPP_CTRL, &val);
+		if (ret < 0)
+			goto error;
+
+		/* preserve this bit to not accidentally shutdown ADC */
+		val &= 0x80;
+		break;
+	}
+
+	if (enable)
+		val |= 0x40;
+	else
+		val &= ~0x40;
+
+	ret = mt312_writereg(state, GPP_CTRL, val);
+
+error:
+	return ret;
+}
+
+static int mt312_sleep(struct dvb_frontend *fe)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	int ret;
+	u8 config;
+
+	/* reset all registers to defaults */
+	ret = mt312_reset(state, 1);
+	if (ret < 0)
+		return ret;
+
+	if (state->id == ID_ZL10313) {
+		/* reset ADC */
+		ret = mt312_writereg(state, GPP_CTRL, 0x00);
+		if (ret < 0)
+			return ret;
+
+		/* full shutdown of ADCs, mpeg bus tristated */
+		ret = mt312_writereg(state, HW_CTRL, 0x0d);
+		if (ret < 0)
+			return ret;
+	}
+
+	ret = mt312_readreg(state, CONFIG, &config);
+	if (ret < 0)
+		return ret;
+
+	/* enter standby */
+	ret = mt312_writereg(state, CONFIG, config & 0x7f);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int mt312_get_tune_settings(struct dvb_frontend *fe,
+		struct dvb_frontend_tune_settings *fesettings)
+{
+	fesettings->min_delay_ms = 50;
+	fesettings->step_size = 0;
+	fesettings->max_drift = 0;
+	return 0;
+}
+
+static void mt312_release(struct dvb_frontend *fe)
+{
+	struct mt312_state *state = fe->demodulator_priv;
+	kfree(state);
+}
+
+#define MT312_SYS_CLK		90000000UL	/* 90 MHz */
+static struct dvb_frontend_ops mt312_ops = {
+	.delsys = { SYS_DVBS },
+	.info = {
+		.name = "Zarlink ???? DVB-S",
+		.frequency_min = 950000,
+		.frequency_max = 2150000,
+		/* FIXME: adjust freq to real used xtal */
+		.frequency_stepsize = (MT312_PLL_CLK / 1000) / 128,
+		.symbol_rate_min = MT312_SYS_CLK / 128, /* FIXME as above */
+		.symbol_rate_max = MT312_SYS_CLK / 2,
+		.caps =
+		    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_MUTE_TS |
+		    FE_CAN_RECOVER
+	},
+
+	.release = mt312_release,
+
+	.init = mt312_initfe,
+	.sleep = mt312_sleep,
+	.i2c_gate_ctrl = mt312_i2c_gate_ctrl,
+
+	.set_frontend = mt312_set_frontend,
+	.get_frontend = mt312_get_frontend,
+	.get_tune_settings = mt312_get_tune_settings,
+
+	.read_status = mt312_read_status,
+	.read_ber = mt312_read_ber,
+	.read_signal_strength = mt312_read_signal_strength,
+	.read_snr = mt312_read_snr,
+	.read_ucblocks = mt312_read_ucblocks,
+
+	.diseqc_send_master_cmd = mt312_send_master_cmd,
+	.diseqc_send_burst = mt312_send_burst,
+	.set_tone = mt312_set_tone,
+	.set_voltage = mt312_set_voltage,
+};
+
+struct dvb_frontend *mt312_attach(const struct mt312_config *config,
+					struct i2c_adapter *i2c)
+{
+	struct mt312_state *state = NULL;
+
+	/* allocate memory for the internal state */
+	state = kzalloc(sizeof(struct mt312_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	/* setup the state */
+	state->config = config;
+	state->i2c = i2c;
+
+	/* check if the demod is there */
+	if (mt312_readreg(state, ID, &state->id) < 0)
+		goto error;
+
+	/* create dvb_frontend */
+	memcpy(&state->frontend.ops, &mt312_ops,
+		sizeof(struct dvb_frontend_ops));
+	state->frontend.demodulator_priv = state;
+
+	switch (state->id) {
+	case ID_VP310:
+		strcpy(state->frontend.ops.info.name, "Zarlink VP310 DVB-S");
+		state->xtal = MT312_PLL_CLK;
+		state->freq_mult = 9;
+		break;
+	case ID_MT312:
+		strcpy(state->frontend.ops.info.name, "Zarlink MT312 DVB-S");
+		state->xtal = MT312_PLL_CLK;
+		state->freq_mult = 6;
+		break;
+	case ID_ZL10313:
+		strcpy(state->frontend.ops.info.name, "Zarlink ZL10313 DVB-S");
+		state->xtal = MT312_PLL_CLK_10_111;
+		state->freq_mult = 9;
+		break;
+	default:
+		printk(KERN_WARNING "Only Zarlink VP310/MT312/ZL10313"
+			" are supported chips.\n");
+		goto error;
+	}
+
+	return &state->frontend;
+
+error:
+	kfree(state);
+	return NULL;
+}
+EXPORT_SYMBOL(mt312_attach);
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("Zarlink VP310/MT312/ZL10313 DVB-S Demodulator driver");
+MODULE_AUTHOR("Andreas Oberritter <obi@linuxtv.org>");
+MODULE_AUTHOR("Matthias Schwarzott <zzam@gentoo.org>");
+MODULE_LICENSE("GPL");
+