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, 641 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/cx22702.c b/drivers/media/dvb-frontends/cx22702.c
new file mode 100644
index 000000000..cc6acbf63
--- /dev/null
+++ b/drivers/media/dvb-frontends/cx22702.c
@@ -0,0 +1,641 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+    Conexant 22702 DVB OFDM demodulator driver
+
+    based on:
+	Alps TDMB7 DVB OFDM demodulator driver
+
+    Copyright (C) 2001-2002 Convergence Integrated Media GmbH
+	  Holger Waechtler <holger@convergence.de>
+
+    Copyright (C) 2004 Steven Toth <stoth@linuxtv.org>
+
+
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <media/dvb_frontend.h>
+#include "cx22702.h"
+
+struct cx22702_state {
+
+	struct i2c_adapter *i2c;
+
+	/* configuration settings */
+	const struct cx22702_config *config;
+
+	struct dvb_frontend frontend;
+
+	/* previous uncorrected block counter */
+	u8 prevUCBlocks;
+};
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Enable verbose debug messages");
+
+#define dprintk	if (debug) printk
+
+/* Register values to initialise the demod */
+static const u8 init_tab[] = {
+	0x00, 0x00, /* Stop acquisition */
+	0x0B, 0x06,
+	0x09, 0x01,
+	0x0D, 0x41,
+	0x16, 0x32,
+	0x20, 0x0A,
+	0x21, 0x17,
+	0x24, 0x3e,
+	0x26, 0xff,
+	0x27, 0x10,
+	0x28, 0x00,
+	0x29, 0x00,
+	0x2a, 0x10,
+	0x2b, 0x00,
+	0x2c, 0x10,
+	0x2d, 0x00,
+	0x48, 0xd4,
+	0x49, 0x56,
+	0x6b, 0x1e,
+	0xc8, 0x02,
+	0xf9, 0x00,
+	0xfa, 0x00,
+	0xfb, 0x00,
+	0xfc, 0x00,
+	0xfd, 0x00,
+};
+
+static int cx22702_writereg(struct cx22702_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 (unlikely(ret != 1)) {
+		printk(KERN_ERR
+			"%s: error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
+			__func__, reg, data, ret);
+		return -1;
+	}
+
+	return 0;
+}
+
+static u8 cx22702_readreg(struct cx22702_state *state, u8 reg)
+{
+	int ret;
+	u8 data;
+
+	struct i2c_msg msg[] = {
+		{ .addr = state->config->demod_address, .flags = 0,
+			.buf = &reg, .len = 1 },
+		{ .addr = state->config->demod_address, .flags = I2C_M_RD,
+			.buf = &data, .len = 1 } };
+
+	ret = i2c_transfer(state->i2c, msg, 2);
+
+	if (unlikely(ret != 2)) {
+		printk(KERN_ERR "%s: error (reg == 0x%02x, ret == %i)\n",
+			__func__, reg, ret);
+		return 0;
+	}
+
+	return data;
+}
+
+static int cx22702_set_inversion(struct cx22702_state *state, int inversion)
+{
+	u8 val;
+
+	val = cx22702_readreg(state, 0x0C);
+	switch (inversion) {
+	case INVERSION_AUTO:
+		return -EOPNOTSUPP;
+	case INVERSION_ON:
+		val |= 0x01;
+		break;
+	case INVERSION_OFF:
+		val &= 0xfe;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return cx22702_writereg(state, 0x0C, val);
+}
+
+/* Retrieve the demod settings */
+static int cx22702_get_tps(struct cx22702_state *state,
+			   struct dtv_frontend_properties *p)
+{
+	u8 val;
+
+	/* Make sure the TPS regs are valid */
+	if (!(cx22702_readreg(state, 0x0A) & 0x20))
+		return -EAGAIN;
+
+	val = cx22702_readreg(state, 0x01);
+	switch ((val & 0x18) >> 3) {
+	case 0:
+		p->modulation = QPSK;
+		break;
+	case 1:
+		p->modulation = QAM_16;
+		break;
+	case 2:
+		p->modulation = QAM_64;
+		break;
+	}
+	switch (val & 0x07) {
+	case 0:
+		p->hierarchy = HIERARCHY_NONE;
+		break;
+	case 1:
+		p->hierarchy = HIERARCHY_1;
+		break;
+	case 2:
+		p->hierarchy = HIERARCHY_2;
+		break;
+	case 3:
+		p->hierarchy = HIERARCHY_4;
+		break;
+	}
+
+
+	val = cx22702_readreg(state, 0x02);
+	switch ((val & 0x38) >> 3) {
+	case 0:
+		p->code_rate_HP = FEC_1_2;
+		break;
+	case 1:
+		p->code_rate_HP = FEC_2_3;
+		break;
+	case 2:
+		p->code_rate_HP = FEC_3_4;
+		break;
+	case 3:
+		p->code_rate_HP = FEC_5_6;
+		break;
+	case 4:
+		p->code_rate_HP = FEC_7_8;
+		break;
+	}
+	switch (val & 0x07) {
+	case 0:
+		p->code_rate_LP = FEC_1_2;
+		break;
+	case 1:
+		p->code_rate_LP = FEC_2_3;
+		break;
+	case 2:
+		p->code_rate_LP = FEC_3_4;
+		break;
+	case 3:
+		p->code_rate_LP = FEC_5_6;
+		break;
+	case 4:
+		p->code_rate_LP = FEC_7_8;
+		break;
+	}
+
+	val = cx22702_readreg(state, 0x03);
+	switch ((val & 0x0c) >> 2) {
+	case 0:
+		p->guard_interval = GUARD_INTERVAL_1_32;
+		break;
+	case 1:
+		p->guard_interval = GUARD_INTERVAL_1_16;
+		break;
+	case 2:
+		p->guard_interval = GUARD_INTERVAL_1_8;
+		break;
+	case 3:
+		p->guard_interval = GUARD_INTERVAL_1_4;
+		break;
+	}
+	switch (val & 0x03) {
+	case 0:
+		p->transmission_mode = TRANSMISSION_MODE_2K;
+		break;
+	case 1:
+		p->transmission_mode = TRANSMISSION_MODE_8K;
+		break;
+	}
+
+	return 0;
+}
+
+static int cx22702_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+	u8 val;
+
+	dprintk("%s(%d)\n", __func__, enable);
+	val = cx22702_readreg(state, 0x0D);
+	if (enable)
+		val &= 0xfe;
+	else
+		val |= 0x01;
+	return cx22702_writereg(state, 0x0D, val);
+}
+
+/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
+static int cx22702_set_tps(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	u8 val;
+	struct cx22702_state *state = fe->demodulator_priv;
+
+	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);
+	}
+
+	/* set inversion */
+	cx22702_set_inversion(state, p->inversion);
+
+	/* set bandwidth */
+	val = cx22702_readreg(state, 0x0C) & 0xcf;
+	switch (p->bandwidth_hz) {
+	case 6000000:
+		val |= 0x20;
+		break;
+	case 7000000:
+		val |= 0x10;
+		break;
+	case 8000000:
+		break;
+	default:
+		dprintk("%s: invalid bandwidth\n", __func__);
+		return -EINVAL;
+	}
+	cx22702_writereg(state, 0x0C, val);
+
+	p->code_rate_LP = FEC_AUTO; /* temp hack as manual not working */
+
+	/* use auto configuration? */
+	if ((p->hierarchy == HIERARCHY_AUTO) ||
+	   (p->modulation == QAM_AUTO) ||
+	   (p->code_rate_HP == FEC_AUTO) ||
+	   (p->code_rate_LP == FEC_AUTO) ||
+	   (p->guard_interval == GUARD_INTERVAL_AUTO) ||
+	   (p->transmission_mode == TRANSMISSION_MODE_AUTO)) {
+
+		/* TPS Source - use hardware driven values */
+		cx22702_writereg(state, 0x06, 0x10);
+		cx22702_writereg(state, 0x07, 0x9);
+		cx22702_writereg(state, 0x08, 0xC1);
+		cx22702_writereg(state, 0x0B, cx22702_readreg(state, 0x0B)
+			& 0xfc);
+		cx22702_writereg(state, 0x0C,
+			(cx22702_readreg(state, 0x0C) & 0xBF) | 0x40);
+		cx22702_writereg(state, 0x00, 0x01); /* Begin acquisition */
+		dprintk("%s: Autodetecting\n", __func__);
+		return 0;
+	}
+
+	/* manually programmed values */
+	switch (p->modulation) {		/* mask 0x18 */
+	case QPSK:
+		val = 0x00;
+		break;
+	case QAM_16:
+		val = 0x08;
+		break;
+	case QAM_64:
+		val = 0x10;
+		break;
+	default:
+		dprintk("%s: invalid modulation\n", __func__);
+		return -EINVAL;
+	}
+	switch (p->hierarchy) {	/* mask 0x07 */
+	case HIERARCHY_NONE:
+		break;
+	case HIERARCHY_1:
+		val |= 0x01;
+		break;
+	case HIERARCHY_2:
+		val |= 0x02;
+		break;
+	case HIERARCHY_4:
+		val |= 0x03;
+		break;
+	default:
+		dprintk("%s: invalid hierarchy\n", __func__);
+		return -EINVAL;
+	}
+	cx22702_writereg(state, 0x06, val);
+
+	switch (p->code_rate_HP) {		/* mask 0x38 */
+	case FEC_NONE:
+	case FEC_1_2:
+		val = 0x00;
+		break;
+	case FEC_2_3:
+		val = 0x08;
+		break;
+	case FEC_3_4:
+		val = 0x10;
+		break;
+	case FEC_5_6:
+		val = 0x18;
+		break;
+	case FEC_7_8:
+		val = 0x20;
+		break;
+	default:
+		dprintk("%s: invalid code_rate_HP\n", __func__);
+		return -EINVAL;
+	}
+	switch (p->code_rate_LP) {		/* mask 0x07 */
+	case FEC_NONE:
+	case FEC_1_2:
+		break;
+	case FEC_2_3:
+		val |= 0x01;
+		break;
+	case FEC_3_4:
+		val |= 0x02;
+		break;
+	case FEC_5_6:
+		val |= 0x03;
+		break;
+	case FEC_7_8:
+		val |= 0x04;
+		break;
+	default:
+		dprintk("%s: invalid code_rate_LP\n", __func__);
+		return -EINVAL;
+	}
+	cx22702_writereg(state, 0x07, val);
+
+	switch (p->guard_interval) {		/* mask 0x0c */
+	case GUARD_INTERVAL_1_32:
+		val = 0x00;
+		break;
+	case GUARD_INTERVAL_1_16:
+		val = 0x04;
+		break;
+	case GUARD_INTERVAL_1_8:
+		val = 0x08;
+		break;
+	case GUARD_INTERVAL_1_4:
+		val = 0x0c;
+		break;
+	default:
+		dprintk("%s: invalid guard_interval\n", __func__);
+		return -EINVAL;
+	}
+	switch (p->transmission_mode) {		/* mask 0x03 */
+	case TRANSMISSION_MODE_2K:
+		break;
+	case TRANSMISSION_MODE_8K:
+		val |= 0x1;
+		break;
+	default:
+		dprintk("%s: invalid transmission_mode\n", __func__);
+		return -EINVAL;
+	}
+	cx22702_writereg(state, 0x08, val);
+	cx22702_writereg(state, 0x0B,
+		(cx22702_readreg(state, 0x0B) & 0xfc) | 0x02);
+	cx22702_writereg(state, 0x0C,
+		(cx22702_readreg(state, 0x0C) & 0xBF) | 0x40);
+
+	/* Begin channel acquisition */
+	cx22702_writereg(state, 0x00, 0x01);
+
+	return 0;
+}
+
+/* Reset the demod hardware and reset all of the configuration registers
+   to a default state. */
+static int cx22702_init(struct dvb_frontend *fe)
+{
+	int i;
+	struct cx22702_state *state = fe->demodulator_priv;
+
+	cx22702_writereg(state, 0x00, 0x02);
+
+	msleep(10);
+
+	for (i = 0; i < ARRAY_SIZE(init_tab); i += 2)
+		cx22702_writereg(state, init_tab[i], init_tab[i + 1]);
+
+	cx22702_writereg(state, 0xf8, (state->config->output_mode << 1)
+		& 0x02);
+
+	cx22702_i2c_gate_ctrl(fe, 0);
+
+	return 0;
+}
+
+static int cx22702_read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+	u8 reg0A;
+	u8 reg23;
+
+	*status = 0;
+
+	reg0A = cx22702_readreg(state, 0x0A);
+	reg23 = cx22702_readreg(state, 0x23);
+
+	dprintk("%s: status demod=0x%02x agc=0x%02x\n"
+		, __func__, reg0A, reg23);
+
+	if (reg0A & 0x10) {
+		*status |= FE_HAS_LOCK;
+		*status |= FE_HAS_VITERBI;
+		*status |= FE_HAS_SYNC;
+	}
+
+	if (reg0A & 0x20)
+		*status |= FE_HAS_CARRIER;
+
+	if (reg23 < 0xf0)
+		*status |= FE_HAS_SIGNAL;
+
+	return 0;
+}
+
+static int cx22702_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+
+	if (cx22702_readreg(state, 0xE4) & 0x02) {
+		/* Realtime statistics */
+		*ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7
+			| (cx22702_readreg(state, 0xDF) & 0x7F);
+	} else {
+		/* Averagtine statistics */
+		*ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7
+			| cx22702_readreg(state, 0xDF);
+	}
+
+	return 0;
+}
+
+static int cx22702_read_signal_strength(struct dvb_frontend *fe,
+	u16 *signal_strength)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+	u8 reg23;
+
+	/*
+	 * Experience suggests that the strength signal register works as
+	 * follows:
+	 * - In the absence of signal, value is 0xff.
+	 * - In the presence of a weak signal, bit 7 is set, not sure what
+	 *   the lower 7 bits mean.
+	 * - In the presence of a strong signal, the register holds a 7-bit
+	 *   value (bit 7 is cleared), with greater values standing for
+	 *   weaker signals.
+	 */
+	reg23 = cx22702_readreg(state, 0x23);
+	if (reg23 & 0x80) {
+		*signal_strength = 0;
+	} else {
+		reg23 = ~reg23 & 0x7f;
+		/* Scale to 16 bit */
+		*signal_strength = (reg23 << 9) | (reg23 << 2) | (reg23 >> 5);
+	}
+
+	return 0;
+}
+
+static int cx22702_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+
+	u16 rs_ber;
+	if (cx22702_readreg(state, 0xE4) & 0x02) {
+		/* Realtime statistics */
+		rs_ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7
+			| (cx22702_readreg(state, 0xDF) & 0x7F);
+	} else {
+		/* Averagine statistics */
+		rs_ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 8
+			| cx22702_readreg(state, 0xDF);
+	}
+	*snr = ~rs_ber;
+
+	return 0;
+}
+
+static int cx22702_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+
+	u8 _ucblocks;
+
+	/* RS Uncorrectable Packet Count then reset */
+	_ucblocks = cx22702_readreg(state, 0xE3);
+	if (state->prevUCBlocks < _ucblocks)
+		*ucblocks = (_ucblocks - state->prevUCBlocks);
+	else
+		*ucblocks = state->prevUCBlocks - _ucblocks;
+	state->prevUCBlocks = _ucblocks;
+
+	return 0;
+}
+
+static int cx22702_get_frontend(struct dvb_frontend *fe,
+				struct dtv_frontend_properties *c)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+
+	u8 reg0C = cx22702_readreg(state, 0x0C);
+
+	c->inversion = reg0C & 0x1 ? INVERSION_ON : INVERSION_OFF;
+	return cx22702_get_tps(state, c);
+}
+
+static int cx22702_get_tune_settings(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *tune)
+{
+	tune->min_delay_ms = 1000;
+	return 0;
+}
+
+static void cx22702_release(struct dvb_frontend *fe)
+{
+	struct cx22702_state *state = fe->demodulator_priv;
+	kfree(state);
+}
+
+static const struct dvb_frontend_ops cx22702_ops;
+
+struct dvb_frontend *cx22702_attach(const struct cx22702_config *config,
+	struct i2c_adapter *i2c)
+{
+	struct cx22702_state *state = NULL;
+
+	/* allocate memory for the internal state */
+	state = kzalloc(sizeof(struct cx22702_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	/* setup the state */
+	state->config = config;
+	state->i2c = i2c;
+
+	/* check if the demod is there */
+	if (cx22702_readreg(state, 0x1f) != 0x3)
+		goto error;
+
+	/* create dvb_frontend */
+	memcpy(&state->frontend.ops, &cx22702_ops,
+		sizeof(struct dvb_frontend_ops));
+	state->frontend.demodulator_priv = state;
+	return &state->frontend;
+
+error:
+	kfree(state);
+	return NULL;
+}
+EXPORT_SYMBOL(cx22702_attach);
+
+static const struct dvb_frontend_ops cx22702_ops = {
+	.delsys = { SYS_DVBT },
+	.info = {
+		.name			= "Conexant CX22702 DVB-T",
+		.frequency_min_hz	= 177 * MHz,
+		.frequency_max_hz	= 858 * MHz,
+		.frequency_stepsize_hz	= 166666,
+		.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_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+		FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
+		FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
+	},
+
+	.release = cx22702_release,
+
+	.init = cx22702_init,
+	.i2c_gate_ctrl = cx22702_i2c_gate_ctrl,
+
+	.set_frontend = cx22702_set_tps,
+	.get_frontend = cx22702_get_frontend,
+	.get_tune_settings = cx22702_get_tune_settings,
+
+	.read_status = cx22702_read_status,
+	.read_ber = cx22702_read_ber,
+	.read_signal_strength = cx22702_read_signal_strength,
+	.read_snr = cx22702_read_snr,
+	.read_ucblocks = cx22702_read_ucblocks,
+};
+
+MODULE_DESCRIPTION("Conexant CX22702 DVB-T Demodulator driver");
+MODULE_AUTHOR("Steven Toth");
+MODULE_LICENSE("GPL");