Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 616 insertions, 0 deletions

diff --git a/drivers/media/tuners/fc0013.c b/drivers/media/tuners/fc0013.c
new file mode 100644
index 000000000..29dd9b55f
--- /dev/null
+++ b/drivers/media/tuners/fc0013.c
@@ -0,0 +1,616 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Fitipower FC0013 tuner driver
+ *
+ * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
+ * partially based on driver code from Fitipower
+ * Copyright (C) 2010 Fitipower Integrated Technology Inc
+ */
+
+#include "fc0013.h"
+#include "fc0013-priv.h"
+
+static int fc0013_writereg(struct fc0013_priv *priv, u8 reg, u8 val)
+{
+	u8 buf[2] = {reg, val};
+	struct i2c_msg msg = {
+		.addr = priv->addr, .flags = 0, .buf = buf, .len = 2
+	};
+
+	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+		err("I2C write reg failed, reg: %02x, val: %02x", reg, val);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static int fc0013_readreg(struct fc0013_priv *priv, u8 reg, u8 *val)
+{
+	struct i2c_msg msg[2] = {
+		{ .addr = priv->addr, .flags = 0, .buf = &reg, .len = 1 },
+		{ .addr = priv->addr, .flags = I2C_M_RD, .buf = val, .len = 1 },
+	};
+
+	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
+		err("I2C read reg failed, reg: %02x", reg);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static void fc0013_release(struct dvb_frontend *fe)
+{
+	kfree(fe->tuner_priv);
+	fe->tuner_priv = NULL;
+}
+
+static int fc0013_init(struct dvb_frontend *fe)
+{
+	struct fc0013_priv *priv = fe->tuner_priv;
+	int i, ret = 0;
+	unsigned char reg[] = {
+		0x00,	/* reg. 0x00: dummy */
+		0x09,	/* reg. 0x01 */
+		0x16,	/* reg. 0x02 */
+		0x00,	/* reg. 0x03 */
+		0x00,	/* reg. 0x04 */
+		0x17,	/* reg. 0x05 */
+		0x02,	/* reg. 0x06 */
+		0x0a,	/* reg. 0x07: CHECK */
+		0xff,	/* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256,
+			   Loop Bw 1/8 */
+		0x6f,	/* reg. 0x09: enable LoopThrough */
+		0xb8,	/* reg. 0x0a: Disable LO Test Buffer */
+		0x82,	/* reg. 0x0b: CHECK */
+		0xfc,	/* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */
+		0x01,	/* reg. 0x0d: AGC Not Forcing & LNA Forcing, may need 0x02 */
+		0x00,	/* reg. 0x0e */
+		0x00,	/* reg. 0x0f */
+		0x00,	/* reg. 0x10 */
+		0x00,	/* reg. 0x11 */
+		0x00,	/* reg. 0x12 */
+		0x00,	/* reg. 0x13 */
+		0x50,	/* reg. 0x14: DVB-t High Gain, UHF.
+			   Middle Gain: 0x48, Low Gain: 0x40 */
+		0x01,	/* reg. 0x15 */
+	};
+
+	switch (priv->xtal_freq) {
+	case FC_XTAL_27_MHZ:
+	case FC_XTAL_28_8_MHZ:
+		reg[0x07] |= 0x20;
+		break;
+	case FC_XTAL_36_MHZ:
+	default:
+		break;
+	}
+
+	if (priv->dual_master)
+		reg[0x0c] |= 0x02;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+	for (i = 1; i < sizeof(reg); i++) {
+		ret = fc0013_writereg(priv, i, reg[i]);
+		if (ret)
+			break;
+	}
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+	if (ret)
+		err("fc0013_writereg failed: %d", ret);
+
+	return ret;
+}
+
+static int fc0013_sleep(struct dvb_frontend *fe)
+{
+	/* nothing to do here */
+	return 0;
+}
+
+int fc0013_rc_cal_add(struct dvb_frontend *fe, int rc_val)
+{
+	struct fc0013_priv *priv = fe->tuner_priv;
+	int ret;
+	u8 rc_cal;
+	int val;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+	/* push rc_cal value, get rc_cal value */
+	ret = fc0013_writereg(priv, 0x10, 0x00);
+	if (ret)
+		goto error_out;
+
+	/* get rc_cal value */
+	ret = fc0013_readreg(priv, 0x10, &rc_cal);
+	if (ret)
+		goto error_out;
+
+	rc_cal &= 0x0f;
+
+	val = (int)rc_cal + rc_val;
+
+	/* forcing rc_cal */
+	ret = fc0013_writereg(priv, 0x0d, 0x11);
+	if (ret)
+		goto error_out;
+
+	/* modify rc_cal value */
+	if (val > 15)
+		ret = fc0013_writereg(priv, 0x10, 0x0f);
+	else if (val < 0)
+		ret = fc0013_writereg(priv, 0x10, 0x00);
+	else
+		ret = fc0013_writereg(priv, 0x10, (u8)val);
+
+error_out:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+	return ret;
+}
+EXPORT_SYMBOL(fc0013_rc_cal_add);
+
+int fc0013_rc_cal_reset(struct dvb_frontend *fe)
+{
+	struct fc0013_priv *priv = fe->tuner_priv;
+	int ret;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+	ret = fc0013_writereg(priv, 0x0d, 0x01);
+	if (!ret)
+		ret = fc0013_writereg(priv, 0x10, 0x00);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+	return ret;
+}
+EXPORT_SYMBOL(fc0013_rc_cal_reset);
+
+static int fc0013_set_vhf_track(struct fc0013_priv *priv, u32 freq)
+{
+	int ret;
+	u8 tmp;
+
+	ret = fc0013_readreg(priv, 0x1d, &tmp);
+	if (ret)
+		goto error_out;
+	tmp &= 0xe3;
+	if (freq <= 177500) {		/* VHF Track: 7 */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
+	} else if (freq <= 184500) {	/* VHF Track: 6 */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x18);
+	} else if (freq <= 191500) {	/* VHF Track: 5 */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x14);
+	} else if (freq <= 198500) {	/* VHF Track: 4 */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x10);
+	} else if (freq <= 205500) {	/* VHF Track: 3 */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x0c);
+	} else if (freq <= 219500) {	/* VHF Track: 2 */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x08);
+	} else if (freq < 300000) {	/* VHF Track: 1 */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x04);
+	} else {			/* UHF and GPS */
+		ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
+	}
+error_out:
+	return ret;
+}
+
+static int fc0013_set_params(struct dvb_frontend *fe)
+{
+	struct fc0013_priv *priv = fe->tuner_priv;
+	int i, ret = 0;
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	u32 freq = p->frequency / 1000;
+	u32 delsys = p->delivery_system;
+	unsigned char reg[7], am, pm, multi, tmp;
+	unsigned long f_vco;
+	unsigned short xtal_freq_khz_2, xin, xdiv;
+	bool vco_select = false;
+
+	if (fe->callback) {
+		ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
+			FC_FE_CALLBACK_VHF_ENABLE, (freq > 300000 ? 0 : 1));
+		if (ret)
+			goto exit;
+	}
+
+	switch (priv->xtal_freq) {
+	case FC_XTAL_27_MHZ:
+		xtal_freq_khz_2 = 27000 / 2;
+		break;
+	case FC_XTAL_36_MHZ:
+		xtal_freq_khz_2 = 36000 / 2;
+		break;
+	case FC_XTAL_28_8_MHZ:
+	default:
+		xtal_freq_khz_2 = 28800 / 2;
+		break;
+	}
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+	/* set VHF track */
+	ret = fc0013_set_vhf_track(priv, freq);
+	if (ret)
+		goto exit;
+
+	if (freq < 300000) {
+		/* enable VHF filter */
+		ret = fc0013_readreg(priv, 0x07, &tmp);
+		if (ret)
+			goto exit;
+		ret = fc0013_writereg(priv, 0x07, tmp | 0x10);
+		if (ret)
+			goto exit;
+
+		/* disable UHF & disable GPS */
+		ret = fc0013_readreg(priv, 0x14, &tmp);
+		if (ret)
+			goto exit;
+		ret = fc0013_writereg(priv, 0x14, tmp & 0x1f);
+		if (ret)
+			goto exit;
+	} else if (freq <= 862000) {
+		/* disable VHF filter */
+		ret = fc0013_readreg(priv, 0x07, &tmp);
+		if (ret)
+			goto exit;
+		ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
+		if (ret)
+			goto exit;
+
+		/* enable UHF & disable GPS */
+		ret = fc0013_readreg(priv, 0x14, &tmp);
+		if (ret)
+			goto exit;
+		ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x40);
+		if (ret)
+			goto exit;
+	} else {
+		/* disable VHF filter */
+		ret = fc0013_readreg(priv, 0x07, &tmp);
+		if (ret)
+			goto exit;
+		ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
+		if (ret)
+			goto exit;
+
+		/* disable UHF & enable GPS */
+		ret = fc0013_readreg(priv, 0x14, &tmp);
+		if (ret)
+			goto exit;
+		ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x20);
+		if (ret)
+			goto exit;
+	}
+
+	/* select frequency divider and the frequency of VCO */
+	if (freq < 37084) {		/* freq * 96 < 3560000 */
+		multi = 96;
+		reg[5] = 0x82;
+		reg[6] = 0x00;
+	} else if (freq < 55625) {	/* freq * 64 < 3560000 */
+		multi = 64;
+		reg[5] = 0x02;
+		reg[6] = 0x02;
+	} else if (freq < 74167) {	/* freq * 48 < 3560000 */
+		multi = 48;
+		reg[5] = 0x42;
+		reg[6] = 0x00;
+	} else if (freq < 111250) {	/* freq * 32 < 3560000 */
+		multi = 32;
+		reg[5] = 0x82;
+		reg[6] = 0x02;
+	} else if (freq < 148334) {	/* freq * 24 < 3560000 */
+		multi = 24;
+		reg[5] = 0x22;
+		reg[6] = 0x00;
+	} else if (freq < 222500) {	/* freq * 16 < 3560000 */
+		multi = 16;
+		reg[5] = 0x42;
+		reg[6] = 0x02;
+	} else if (freq < 296667) {	/* freq * 12 < 3560000 */
+		multi = 12;
+		reg[5] = 0x12;
+		reg[6] = 0x00;
+	} else if (freq < 445000) {	/* freq * 8 < 3560000 */
+		multi = 8;
+		reg[5] = 0x22;
+		reg[6] = 0x02;
+	} else if (freq < 593334) {	/* freq * 6 < 3560000 */
+		multi = 6;
+		reg[5] = 0x0a;
+		reg[6] = 0x00;
+	} else if (freq < 950000) {	/* freq * 4 < 3800000 */
+		multi = 4;
+		reg[5] = 0x12;
+		reg[6] = 0x02;
+	} else {
+		multi = 2;
+		reg[5] = 0x0a;
+		reg[6] = 0x02;
+	}
+
+	f_vco = freq * multi;
+
+	if (f_vco >= 3060000) {
+		reg[6] |= 0x08;
+		vco_select = true;
+	}
+
+	if (freq >= 45000) {
+		/* From divided value (XDIV) determined the FA and FP value */
+		xdiv = (unsigned short)(f_vco / xtal_freq_khz_2);
+		if ((f_vco - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2))
+			xdiv++;
+
+		pm = (unsigned char)(xdiv / 8);
+		am = (unsigned char)(xdiv - (8 * pm));
+
+		if (am < 2) {
+			reg[1] = am + 8;
+			reg[2] = pm - 1;
+		} else {
+			reg[1] = am;
+			reg[2] = pm;
+		}
+	} else {
+		/* fix for frequency less than 45 MHz */
+		reg[1] = 0x06;
+		reg[2] = 0x11;
+	}
+
+	/* fix clock out */
+	reg[6] |= 0x20;
+
+	/* From VCO frequency determines the XIN ( fractional part of Delta
+	   Sigma PLL) and divided value (XDIV) */
+	xin = (unsigned short)(f_vco - (f_vco / xtal_freq_khz_2) * xtal_freq_khz_2);
+	xin = (xin << 15) / xtal_freq_khz_2;
+	if (xin >= 16384)
+		xin += 32768;
+
+	reg[3] = xin >> 8;
+	reg[4] = xin & 0xff;
+
+	if (delsys == SYS_DVBT) {
+		reg[6] &= 0x3f; /* bits 6 and 7 describe the bandwidth */
+		switch (p->bandwidth_hz) {
+		case 6000000:
+			reg[6] |= 0x80;
+			break;
+		case 7000000:
+			reg[6] |= 0x40;
+			break;
+		case 8000000:
+		default:
+			break;
+		}
+	} else {
+		err("%s: modulation type not supported!", __func__);
+		return -EINVAL;
+	}
+
+	/* modified for Realtek demod */
+	reg[5] |= 0x07;
+
+	for (i = 1; i <= 6; i++) {
+		ret = fc0013_writereg(priv, i, reg[i]);
+		if (ret)
+			goto exit;
+	}
+
+	ret = fc0013_readreg(priv, 0x11, &tmp);
+	if (ret)
+		goto exit;
+	if (multi == 64)
+		ret = fc0013_writereg(priv, 0x11, tmp | 0x04);
+	else
+		ret = fc0013_writereg(priv, 0x11, tmp & 0xfb);
+	if (ret)
+		goto exit;
+
+	/* VCO Calibration */
+	ret = fc0013_writereg(priv, 0x0e, 0x80);
+	if (!ret)
+		ret = fc0013_writereg(priv, 0x0e, 0x00);
+
+	/* VCO Re-Calibration if needed */
+	if (!ret)
+		ret = fc0013_writereg(priv, 0x0e, 0x00);
+
+	if (!ret) {
+		msleep(10);
+		ret = fc0013_readreg(priv, 0x0e, &tmp);
+	}
+	if (ret)
+		goto exit;
+
+	/* vco selection */
+	tmp &= 0x3f;
+
+	if (vco_select) {
+		if (tmp > 0x3c) {
+			reg[6] &= ~0x08;
+			ret = fc0013_writereg(priv, 0x06, reg[6]);
+			if (!ret)
+				ret = fc0013_writereg(priv, 0x0e, 0x80);
+			if (!ret)
+				ret = fc0013_writereg(priv, 0x0e, 0x00);
+		}
+	} else {
+		if (tmp < 0x02) {
+			reg[6] |= 0x08;
+			ret = fc0013_writereg(priv, 0x06, reg[6]);
+			if (!ret)
+				ret = fc0013_writereg(priv, 0x0e, 0x80);
+			if (!ret)
+				ret = fc0013_writereg(priv, 0x0e, 0x00);
+		}
+	}
+
+	priv->frequency = p->frequency;
+	priv->bandwidth = p->bandwidth_hz;
+
+exit:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+	if (ret)
+		warn("%s: failed: %d", __func__, ret);
+	return ret;
+}
+
+static int fc0013_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct fc0013_priv *priv = fe->tuner_priv;
+	*frequency = priv->frequency;
+	return 0;
+}
+
+static int fc0013_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	/* always ? */
+	*frequency = 0;
+	return 0;
+}
+
+static int fc0013_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+	struct fc0013_priv *priv = fe->tuner_priv;
+	*bandwidth = priv->bandwidth;
+	return 0;
+}
+
+#define INPUT_ADC_LEVEL	-8
+
+static int fc0013_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct fc0013_priv *priv = fe->tuner_priv;
+	int ret;
+	unsigned char tmp;
+	int int_temp, lna_gain, int_lna, tot_agc_gain, power;
+	static const int fc0013_lna_gain_table[] = {
+		/* low gain */
+		-63, -58, -99, -73,
+		-63, -65, -54, -60,
+		/* middle gain */
+		 71,  70,  68,  67,
+		 65,  63,  61,  58,
+		/* high gain */
+		197, 191, 188, 186,
+		184, 182, 181, 179,
+	};
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+	ret = fc0013_writereg(priv, 0x13, 0x00);
+	if (ret)
+		goto err;
+
+	ret = fc0013_readreg(priv, 0x13, &tmp);
+	if (ret)
+		goto err;
+	int_temp = tmp;
+
+	ret = fc0013_readreg(priv, 0x14, &tmp);
+	if (ret)
+		goto err;
+	lna_gain = tmp & 0x1f;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+	if (lna_gain < ARRAY_SIZE(fc0013_lna_gain_table)) {
+		int_lna = fc0013_lna_gain_table[lna_gain];
+		tot_agc_gain = (abs((int_temp >> 5) - 7) - 2 +
+				(int_temp & 0x1f)) * 2;
+		power = INPUT_ADC_LEVEL - tot_agc_gain - int_lna / 10;
+
+		if (power >= 45)
+			*strength = 255;	/* 100% */
+		else if (power < -95)
+			*strength = 0;
+		else
+			*strength = (power + 95) * 255 / 140;
+
+		*strength |= *strength << 8;
+	} else {
+		ret = -1;
+	}
+
+	goto exit;
+
+err:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+exit:
+	if (ret)
+		warn("%s: failed: %d", __func__, ret);
+	return ret;
+}
+
+static const struct dvb_tuner_ops fc0013_tuner_ops = {
+	.info = {
+		.name		  = "Fitipower FC0013",
+
+		.frequency_min_hz =   37 * MHz,	/* estimate */
+		.frequency_max_hz = 1680 * MHz,	/* CHECK */
+	},
+
+	.release	= fc0013_release,
+
+	.init		= fc0013_init,
+	.sleep		= fc0013_sleep,
+
+	.set_params	= fc0013_set_params,
+
+	.get_frequency	= fc0013_get_frequency,
+	.get_if_frequency = fc0013_get_if_frequency,
+	.get_bandwidth	= fc0013_get_bandwidth,
+
+	.get_rf_strength = fc0013_get_rf_strength,
+};
+
+struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe,
+	struct i2c_adapter *i2c, u8 i2c_address, int dual_master,
+	enum fc001x_xtal_freq xtal_freq)
+{
+	struct fc0013_priv *priv = NULL;
+
+	priv = kzalloc(sizeof(struct fc0013_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return NULL;
+
+	priv->i2c = i2c;
+	priv->dual_master = dual_master;
+	priv->addr = i2c_address;
+	priv->xtal_freq = xtal_freq;
+
+	info("Fitipower FC0013 successfully attached.");
+
+	fe->tuner_priv = priv;
+
+	memcpy(&fe->ops.tuner_ops, &fc0013_tuner_ops,
+		sizeof(struct dvb_tuner_ops));
+
+	return fe;
+}
+EXPORT_SYMBOL(fc0013_attach);
+
+MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver");
+MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.2");