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, 730 insertions, 0 deletions

diff --git a/drivers/media/tuners/m88rs6000t.c b/drivers/media/tuners/m88rs6000t.c
new file mode 100644
index 000000000..7d172a5a6
--- /dev/null
+++ b/drivers/media/tuners/m88rs6000t.c
@@ -0,0 +1,730 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for the internal tuner of Montage M88RS6000
+ *
+ * Copyright (C) 2014 Max nibble <nibble.max@gmail.com>
+ */
+
+#include "m88rs6000t.h"
+#include <linux/regmap.h>
+
+struct m88rs6000t_dev {
+	struct m88rs6000t_config cfg;
+	struct i2c_client *client;
+	struct regmap *regmap;
+	u32 frequency_khz;
+};
+
+struct m88rs6000t_reg_val {
+	u8 reg;
+	u8 val;
+};
+
+/* set demod main mclk and ts mclk */
+static int m88rs6000t_set_demod_mclk(struct dvb_frontend *fe)
+{
+	struct m88rs6000t_dev *dev = fe->tuner_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	u8 reg11, reg15, reg16, reg1D, reg1E, reg1F;
+	u8 N, f0 = 0, f1 = 0, f2 = 0, f3 = 0;
+	u16 pll_div_fb;
+	u32 div, ts_mclk;
+	unsigned int utmp;
+	int ret;
+
+	/* select demod main mclk */
+	ret = regmap_read(dev->regmap, 0x15, &utmp);
+	if (ret)
+		goto err;
+	reg15 = utmp;
+	if (c->symbol_rate > 45010000) {
+		reg11 = 0x0E;
+		reg15 |= 0x02;
+		reg16 = 115; /* mclk = 110.25MHz */
+	} else {
+		reg11 = 0x0A;
+		reg15 &= ~0x02;
+		reg16 = 96; /* mclk = 96MHz */
+	}
+
+	/* set ts mclk */
+	if (c->delivery_system == SYS_DVBS)
+		ts_mclk = 96000;
+	else
+		ts_mclk = 144000;
+
+	pll_div_fb = (reg15 & 0x01) << 8;
+	pll_div_fb += reg16;
+	pll_div_fb += 32;
+
+	div = 36000 * pll_div_fb;
+	div /= ts_mclk;
+
+	if (div <= 32) {
+		N = 2;
+		f0 = 0;
+		f1 = div / 2;
+		f2 = div - f1;
+		f3 = 0;
+	} else if (div <= 48) {
+		N = 3;
+		f0 = div / 3;
+		f1 = (div - f0) / 2;
+		f2 = div - f0 - f1;
+		f3 = 0;
+	} else if (div <= 64) {
+		N = 4;
+		f0 = div / 4;
+		f1 = (div - f0) / 3;
+		f2 = (div - f0 - f1) / 2;
+		f3 = div - f0 - f1 - f2;
+	} else {
+		N = 4;
+		f0 = 16;
+		f1 = 16;
+		f2 = 16;
+		f3 = 16;
+	}
+
+	if (f0 == 16)
+		f0 = 0;
+	if (f1 == 16)
+		f1 = 0;
+	if (f2 == 16)
+		f2 = 0;
+	if (f3 == 16)
+		f3 = 0;
+
+	ret = regmap_read(dev->regmap, 0x1D, &utmp);
+	if (ret)
+		goto err;
+	reg1D = utmp;
+	reg1D &= ~0x03;
+	reg1D |= N - 1;
+	reg1E = ((f3 << 4) + f2) & 0xFF;
+	reg1F = ((f1 << 4) + f0) & 0xFF;
+
+	/* program and recalibrate demod PLL */
+	ret = regmap_write(dev->regmap, 0x05, 0x40);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x11, 0x08);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x15, reg15);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x16, reg16);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x1D, reg1D);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x1E, reg1E);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x1F, reg1F);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x17, 0xc1);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x17, 0x81);
+	if (ret)
+		goto err;
+	usleep_range(5000, 50000);
+	ret = regmap_write(dev->regmap, 0x05, 0x00);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x11, reg11);
+	if (ret)
+		goto err;
+	usleep_range(5000, 50000);
+err:
+	if (ret)
+		dev_dbg(&dev->client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int m88rs6000t_set_pll_freq(struct m88rs6000t_dev *dev,
+			u32 tuner_freq_MHz)
+{
+	u32 fcry_KHz, ulNDiv1, ulNDiv2, ulNDiv;
+	u8 refDiv, ucLoDiv1, ucLomod1, ucLoDiv2, ucLomod2, ucLoDiv, ucLomod;
+	u8 reg27, reg29, reg42, reg42buf;
+	unsigned int utmp;
+	int ret;
+
+	fcry_KHz = 27000; /* in kHz */
+	refDiv = 27;
+
+	ret = regmap_write(dev->regmap, 0x36, (refDiv - 8));
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x31, 0x00);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x2c, 0x02);
+	if (ret)
+		goto err;
+
+	if (tuner_freq_MHz >= 1550) {
+		ucLoDiv1 = 2;
+		ucLomod1 = 0;
+		ucLoDiv2 = 2;
+		ucLomod2 = 0;
+	} else if (tuner_freq_MHz >= 1380) {
+		ucLoDiv1 = 3;
+		ucLomod1 = 16;
+		ucLoDiv2 = 2;
+		ucLomod2 = 0;
+	} else if (tuner_freq_MHz >= 1070) {
+		ucLoDiv1 = 3;
+		ucLomod1 = 16;
+		ucLoDiv2 = 3;
+		ucLomod2 = 16;
+	} else if (tuner_freq_MHz >= 1000) {
+		ucLoDiv1 = 3;
+		ucLomod1 = 16;
+		ucLoDiv2 = 4;
+		ucLomod2 = 64;
+	} else if (tuner_freq_MHz >= 775) {
+		ucLoDiv1 = 4;
+		ucLomod1 = 64;
+		ucLoDiv2 = 4;
+		ucLomod2 = 64;
+	} else if (tuner_freq_MHz >= 700) {
+		ucLoDiv1 = 6;
+		ucLomod1 = 48;
+		ucLoDiv2 = 4;
+		ucLomod2 = 64;
+	} else if (tuner_freq_MHz >= 520) {
+		ucLoDiv1 = 6;
+		ucLomod1 = 48;
+		ucLoDiv2 = 6;
+		ucLomod2 = 48;
+	} else {
+		ucLoDiv1 = 8;
+		ucLomod1 = 96;
+		ucLoDiv2 = 8;
+		ucLomod2 = 96;
+	}
+
+	ulNDiv1 = ((tuner_freq_MHz * ucLoDiv1 * 1000) * refDiv
+			/ fcry_KHz - 1024) / 2;
+	ulNDiv2 = ((tuner_freq_MHz * ucLoDiv2 * 1000) * refDiv
+			/ fcry_KHz - 1024) / 2;
+
+	reg27 = (((ulNDiv1 >> 8) & 0x0F) + ucLomod1) & 0x7F;
+	ret = regmap_write(dev->regmap, 0x27, reg27);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x28, (u8)(ulNDiv1 & 0xFF));
+	if (ret)
+		goto err;
+	reg29 = (((ulNDiv2 >> 8) & 0x0F) + ucLomod2) & 0x7f;
+	ret = regmap_write(dev->regmap, 0x29, reg29);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x2a, (u8)(ulNDiv2 & 0xFF));
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x2F, 0xf5);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x30, 0x05);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x08, 0x1f);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x08, 0x3f);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x09, 0x20);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x09, 0x00);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x3e, 0x11);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x08, 0x2f);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x08, 0x3f);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x09, 0x10);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x09, 0x00);
+	if (ret)
+		goto err;
+	usleep_range(2000, 50000);
+
+	ret = regmap_read(dev->regmap, 0x42, &utmp);
+	if (ret)
+		goto err;
+	reg42 = utmp;
+
+	ret = regmap_write(dev->regmap, 0x3e, 0x10);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x08, 0x2f);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x08, 0x3f);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x09, 0x10);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x09, 0x00);
+	if (ret)
+		goto err;
+	usleep_range(2000, 50000);
+
+	ret = regmap_read(dev->regmap, 0x42, &utmp);
+	if (ret)
+		goto err;
+	reg42buf = utmp;
+	if (reg42buf < reg42) {
+		ret = regmap_write(dev->regmap, 0x3e, 0x11);
+		if (ret)
+			goto err;
+	}
+	usleep_range(5000, 50000);
+
+	ret = regmap_read(dev->regmap, 0x2d, &utmp);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x2d, utmp);
+	if (ret)
+		goto err;
+	ret = regmap_read(dev->regmap, 0x2e, &utmp);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x2e, utmp);
+	if (ret)
+		goto err;
+
+	ret = regmap_read(dev->regmap, 0x27, &utmp);
+	if (ret)
+		goto err;
+	reg27 = utmp & 0x70;
+	ret = regmap_read(dev->regmap, 0x83, &utmp);
+	if (ret)
+		goto err;
+	if (reg27 == (utmp & 0x70)) {
+		ucLoDiv	= ucLoDiv1;
+		ulNDiv = ulNDiv1;
+		ucLomod = ucLomod1 / 16;
+	} else {
+		ucLoDiv	= ucLoDiv2;
+		ulNDiv = ulNDiv2;
+		ucLomod = ucLomod2 / 16;
+	}
+
+	if ((ucLoDiv == 3) || (ucLoDiv == 6)) {
+		refDiv = 18;
+		ret = regmap_write(dev->regmap, 0x36, (refDiv - 8));
+		if (ret)
+			goto err;
+		ulNDiv = ((tuner_freq_MHz * ucLoDiv * 1000) * refDiv
+				/ fcry_KHz - 1024) / 2;
+	}
+
+	reg27 = (0x80 + ((ucLomod << 4) & 0x70)
+			+ ((ulNDiv >> 8) & 0x0F)) & 0xFF;
+	ret = regmap_write(dev->regmap, 0x27, reg27);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x28, (u8)(ulNDiv & 0xFF));
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x29, 0x80);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x31, 0x03);
+	if (ret)
+		goto err;
+
+	if (ucLoDiv == 3)
+		utmp = 0xCE;
+	else
+		utmp = 0x8A;
+	ret = regmap_write(dev->regmap, 0x3b, utmp);
+	if (ret)
+		goto err;
+
+	dev->frequency_khz = fcry_KHz * (ulNDiv * 2 + 1024) / refDiv / ucLoDiv;
+
+	dev_dbg(&dev->client->dev,
+		"actual tune frequency=%d\n", dev->frequency_khz);
+err:
+	if (ret)
+		dev_dbg(&dev->client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int m88rs6000t_set_bb(struct m88rs6000t_dev *dev,
+		u32 symbol_rate_KSs, s32 lpf_offset_KHz)
+{
+	u32 f3dB;
+	u8  reg40;
+
+	f3dB = symbol_rate_KSs * 9 / 14 + 2000;
+	f3dB += lpf_offset_KHz;
+	f3dB = clamp_val(f3dB, 6000U, 43000U);
+	reg40 = f3dB / 1000;
+	return regmap_write(dev->regmap, 0x40, reg40);
+}
+
+static int m88rs6000t_set_params(struct dvb_frontend *fe)
+{
+	struct m88rs6000t_dev *dev = fe->tuner_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	s32 lpf_offset_KHz;
+	u32 realFreq, freq_MHz;
+
+	dev_dbg(&dev->client->dev,
+			"frequency=%d symbol_rate=%d\n",
+			c->frequency, c->symbol_rate);
+
+	if (c->symbol_rate < 5000000)
+		lpf_offset_KHz = 3000;
+	else
+		lpf_offset_KHz = 0;
+
+	realFreq = c->frequency + lpf_offset_KHz;
+	/* set tuner pll.*/
+	freq_MHz = (realFreq + 500) / 1000;
+	ret = m88rs6000t_set_pll_freq(dev, freq_MHz);
+	if (ret)
+		goto err;
+	ret = m88rs6000t_set_bb(dev, c->symbol_rate / 1000, lpf_offset_KHz);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x00, 0x01);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x00, 0x00);
+	if (ret)
+		goto err;
+	/* set demod mlck */
+	ret = m88rs6000t_set_demod_mclk(fe);
+err:
+	if (ret)
+		dev_dbg(&dev->client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int m88rs6000t_init(struct dvb_frontend *fe)
+{
+	struct m88rs6000t_dev *dev = fe->tuner_priv;
+	int ret;
+
+	dev_dbg(&dev->client->dev, "%s:\n", __func__);
+
+	ret = regmap_update_bits(dev->regmap, 0x11, 0x08, 0x08);
+	if (ret)
+		goto err;
+	usleep_range(5000, 50000);
+	ret = regmap_update_bits(dev->regmap, 0x10, 0x01, 0x01);
+	if (ret)
+		goto err;
+	usleep_range(10000, 50000);
+	ret = regmap_write(dev->regmap, 0x07, 0x7d);
+err:
+	if (ret)
+		dev_dbg(&dev->client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static int m88rs6000t_sleep(struct dvb_frontend *fe)
+{
+	struct m88rs6000t_dev *dev = fe->tuner_priv;
+	int ret;
+
+	dev_dbg(&dev->client->dev, "%s:\n", __func__);
+
+	ret = regmap_write(dev->regmap, 0x07, 0x6d);
+	if (ret) {
+		dev_dbg(&dev->client->dev, "failed=%d\n", ret);
+		return ret;
+	}
+	usleep_range(5000, 10000);
+	return 0;
+}
+
+static int m88rs6000t_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct m88rs6000t_dev *dev = fe->tuner_priv;
+
+	dev_dbg(&dev->client->dev, "\n");
+
+	*frequency = dev->frequency_khz;
+	return 0;
+}
+
+static int m88rs6000t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct m88rs6000t_dev *dev = fe->tuner_priv;
+
+	dev_dbg(&dev->client->dev, "\n");
+
+	*frequency = 0; /* Zero-IF */
+	return 0;
+}
+
+
+static int m88rs6000t_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct m88rs6000t_dev *dev = fe->tuner_priv;
+	unsigned int val, i;
+	int ret;
+	u16 gain;
+	u32 PGA2_cri_GS = 46, PGA2_crf_GS = 290, TIA_GS = 290;
+	u32 RF_GC = 1200, IF_GC = 1100, BB_GC = 300;
+	u32 PGA2_GC = 300, TIA_GC = 300, PGA2_cri = 0, PGA2_crf = 0;
+	u32 RFG = 0, IFG = 0, BBG = 0, PGA2G = 0, TIAG = 0;
+	u32 RFGS[13] = {0, 245, 266, 268, 270, 285,
+			298, 295, 283, 285, 285, 300, 300};
+	u32 IFGS[12] = {0, 300, 230, 270, 270, 285,
+			295, 285, 290, 295, 295, 310};
+	u32 BBGS[14] = {0, 286, 275, 290, 294, 300, 290,
+			290, 285, 283, 260, 295, 290, 260};
+
+	ret = regmap_read(dev->regmap, 0x5A, &val);
+	if (ret)
+		goto err;
+	RF_GC = val & 0x0f;
+
+	ret = regmap_read(dev->regmap, 0x5F, &val);
+	if (ret)
+		goto err;
+	IF_GC = val & 0x0f;
+
+	ret = regmap_read(dev->regmap, 0x3F, &val);
+	if (ret)
+		goto err;
+	TIA_GC = (val >> 4) & 0x07;
+
+	ret = regmap_read(dev->regmap, 0x77, &val);
+	if (ret)
+		goto err;
+	BB_GC = (val >> 4) & 0x0f;
+
+	ret = regmap_read(dev->regmap, 0x76, &val);
+	if (ret)
+		goto err;
+	PGA2_GC = val & 0x3f;
+	PGA2_cri = PGA2_GC >> 2;
+	PGA2_crf = PGA2_GC & 0x03;
+
+	for (i = 0; i <= RF_GC && i < ARRAY_SIZE(RFGS); i++)
+		RFG += RFGS[i];
+
+	if (RF_GC == 0)
+		RFG += 400;
+	if (RF_GC == 1)
+		RFG += 300;
+	if (RF_GC == 2)
+		RFG += 200;
+	if (RF_GC == 3)
+		RFG += 100;
+
+	for (i = 0; i <= IF_GC && i < ARRAY_SIZE(IFGS); i++)
+		IFG += IFGS[i];
+
+	TIAG = TIA_GC * TIA_GS;
+
+	for (i = 0; i <= BB_GC && i < ARRAY_SIZE(BBGS); i++)
+		BBG += BBGS[i];
+
+	PGA2G = PGA2_cri * PGA2_cri_GS + PGA2_crf * PGA2_crf_GS;
+
+	gain = RFG + IFG - TIAG + BBG + PGA2G;
+
+	/* scale value to 0x0000-0xffff */
+	gain = clamp_val(gain, 1000U, 10500U);
+	*strength = (10500 - gain) * 0xffff / (10500 - 1000);
+err:
+	if (ret)
+		dev_dbg(&dev->client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+static const struct dvb_tuner_ops m88rs6000t_tuner_ops = {
+	.info = {
+		.name             = "Montage M88RS6000 Internal Tuner",
+		.frequency_min_hz =  950 * MHz,
+		.frequency_max_hz = 2150 * MHz,
+	},
+
+	.init = m88rs6000t_init,
+	.sleep = m88rs6000t_sleep,
+	.set_params = m88rs6000t_set_params,
+	.get_frequency = m88rs6000t_get_frequency,
+	.get_if_frequency = m88rs6000t_get_if_frequency,
+	.get_rf_strength = m88rs6000t_get_rf_strength,
+};
+
+static int m88rs6000t_probe(struct i2c_client *client)
+{
+	struct m88rs6000t_config *cfg = client->dev.platform_data;
+	struct dvb_frontend *fe = cfg->fe;
+	struct m88rs6000t_dev *dev;
+	int ret, i;
+	unsigned int utmp;
+	static const struct regmap_config regmap_config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+	};
+	static const struct m88rs6000t_reg_val reg_vals[] = {
+		{0x10, 0xfb},
+		{0x24, 0x38},
+		{0x11, 0x0a},
+		{0x12, 0x00},
+		{0x2b, 0x1c},
+		{0x44, 0x48},
+		{0x54, 0x24},
+		{0x55, 0x06},
+		{0x59, 0x00},
+		{0x5b, 0x4c},
+		{0x60, 0x8b},
+		{0x61, 0xf4},
+		{0x65, 0x07},
+		{0x6d, 0x6f},
+		{0x6e, 0x31},
+		{0x3c, 0xf3},
+		{0x37, 0x0f},
+		{0x48, 0x28},
+		{0x49, 0xd8},
+		{0x70, 0x66},
+		{0x71, 0xCF},
+		{0x72, 0x81},
+		{0x73, 0xA7},
+		{0x74, 0x4F},
+		{0x75, 0xFC},
+	};
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev) {
+		ret = -ENOMEM;
+		dev_err(&client->dev, "kzalloc() failed\n");
+		goto err;
+	}
+
+	memcpy(&dev->cfg, cfg, sizeof(struct m88rs6000t_config));
+	dev->client = client;
+	dev->regmap = devm_regmap_init_i2c(client, &regmap_config);
+	if (IS_ERR(dev->regmap)) {
+		ret = PTR_ERR(dev->regmap);
+		goto err;
+	}
+
+	ret = regmap_update_bits(dev->regmap, 0x11, 0x08, 0x08);
+	if (ret)
+		goto err;
+	usleep_range(5000, 50000);
+	ret = regmap_update_bits(dev->regmap, 0x10, 0x01, 0x01);
+	if (ret)
+		goto err;
+	usleep_range(10000, 50000);
+	ret = regmap_write(dev->regmap, 0x07, 0x7d);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x04, 0x01);
+	if (ret)
+		goto err;
+
+	/* check tuner chip id */
+	ret = regmap_read(dev->regmap, 0x01, &utmp);
+	if (ret)
+		goto err;
+	dev_info(&dev->client->dev, "chip_id=%02x\n", utmp);
+	if (utmp != 0x64) {
+		ret = -ENODEV;
+		goto err;
+	}
+
+	/* tuner init. */
+	ret = regmap_write(dev->regmap, 0x05, 0x40);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x11, 0x08);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x15, 0x6c);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x17, 0xc1);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x17, 0x81);
+	if (ret)
+		goto err;
+	usleep_range(10000, 50000);
+	ret = regmap_write(dev->regmap, 0x05, 0x00);
+	if (ret)
+		goto err;
+	ret = regmap_write(dev->regmap, 0x11, 0x0a);
+	if (ret)
+		goto err;
+
+	for (i = 0; i < ARRAY_SIZE(reg_vals); i++) {
+		ret = regmap_write(dev->regmap,
+				reg_vals[i].reg, reg_vals[i].val);
+		if (ret)
+			goto err;
+	}
+
+	dev_info(&dev->client->dev, "Montage M88RS6000 internal tuner successfully identified\n");
+
+	fe->tuner_priv = dev;
+	memcpy(&fe->ops.tuner_ops, &m88rs6000t_tuner_ops,
+			sizeof(struct dvb_tuner_ops));
+	i2c_set_clientdata(client, dev);
+	return 0;
+err:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	kfree(dev);
+	return ret;
+}
+
+static void m88rs6000t_remove(struct i2c_client *client)
+{
+	struct m88rs6000t_dev *dev = i2c_get_clientdata(client);
+	struct dvb_frontend *fe = dev->cfg.fe;
+
+	dev_dbg(&client->dev, "\n");
+
+	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+	fe->tuner_priv = NULL;
+	kfree(dev);
+}
+
+static const struct i2c_device_id m88rs6000t_id[] = {
+	{"m88rs6000t", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, m88rs6000t_id);
+
+static struct i2c_driver m88rs6000t_driver = {
+	.driver = {
+		.name	= "m88rs6000t",
+	},
+	.probe_new	= m88rs6000t_probe,
+	.remove		= m88rs6000t_remove,
+	.id_table	= m88rs6000t_id,
+};
+
+module_i2c_driver(m88rs6000t_driver);
+
+MODULE_AUTHOR("Max nibble <nibble.max@gmail.com>");
+MODULE_DESCRIPTION("Montage M88RS6000 internal tuner driver");
+MODULE_LICENSE("GPL");