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, 693 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/cxd2099.c b/drivers/media/dvb-frontends/cxd2099.c
new file mode 100644
index 000000000..c0967ad95
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2099.c
@@ -0,0 +1,693 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * cxd2099.c: Driver for the Sony CXD2099AR Common Interface Controller
+ *
+ * Copyright (C) 2010-2013 Digital Devices GmbH
+ */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+
+#include "cxd2099.h"
+
+static int buffermode;
+module_param(buffermode, int, 0444);
+MODULE_PARM_DESC(buffermode, "Enable CXD2099AR buffer mode (default: disabled)");
+
+static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount);
+
+struct cxd {
+	struct dvb_ca_en50221 en;
+
+	struct cxd2099_cfg cfg;
+	struct i2c_client *client;
+	struct regmap *regmap;
+
+	u8     regs[0x23];
+	u8     lastaddress;
+	u8     clk_reg_f;
+	u8     clk_reg_b;
+	int    mode;
+	int    ready;
+	int    dr;
+	int    write_busy;
+	int    slot_stat;
+
+	u8     amem[1024];
+	int    amem_read;
+
+	int    cammode;
+	struct mutex lock; /* device access lock */
+
+	u8     rbuf[1028];
+	u8     wbuf[1028];
+};
+
+static int read_block(struct cxd *ci, u8 adr, u8 *data, u16 n)
+{
+	int status = 0;
+
+	if (ci->lastaddress != adr)
+		status = regmap_write(ci->regmap, 0, adr);
+	if (!status) {
+		ci->lastaddress = adr;
+
+		while (n) {
+			int len = n;
+
+			if (ci->cfg.max_i2c && len > ci->cfg.max_i2c)
+				len = ci->cfg.max_i2c;
+			status = regmap_raw_read(ci->regmap, 1, data, len);
+			if (status)
+				return status;
+			data += len;
+			n -= len;
+		}
+	}
+	return status;
+}
+
+static int read_reg(struct cxd *ci, u8 reg, u8 *val)
+{
+	return read_block(ci, reg, val, 1);
+}
+
+static int read_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
+{
+	int status;
+	u8 addr[2] = {address & 0xff, address >> 8};
+
+	status = regmap_raw_write(ci->regmap, 2, addr, 2);
+	if (!status)
+		status = regmap_raw_read(ci->regmap, 3, data, n);
+	return status;
+}
+
+static int write_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
+{
+	int status;
+	u8 addr[2] = {address & 0xff, address >> 8};
+
+	status = regmap_raw_write(ci->regmap, 2, addr, 2);
+	if (!status) {
+		u8 buf[256];
+
+		memcpy(buf, data, n);
+		status = regmap_raw_write(ci->regmap, 3, buf, n);
+	}
+	return status;
+}
+
+static int read_io(struct cxd *ci, u16 address, unsigned int *val)
+{
+	int status;
+	u8 addr[2] = {address & 0xff, address >> 8};
+
+	status = regmap_raw_write(ci->regmap, 2, addr, 2);
+	if (!status)
+		status = regmap_read(ci->regmap, 3, val);
+	return status;
+}
+
+static int write_io(struct cxd *ci, u16 address, u8 val)
+{
+	int status;
+	u8 addr[2] = {address & 0xff, address >> 8};
+
+	status = regmap_raw_write(ci->regmap, 2, addr, 2);
+	if (!status)
+		status = regmap_write(ci->regmap, 3, val);
+	return status;
+}
+
+static int write_regm(struct cxd *ci, u8 reg, u8 val, u8 mask)
+{
+	int status = 0;
+	unsigned int regval;
+
+	if (ci->lastaddress != reg)
+		status = regmap_write(ci->regmap, 0, reg);
+	if (!status && reg >= 6 && reg <= 8 && mask != 0xff) {
+		status = regmap_read(ci->regmap, 1, &regval);
+		ci->regs[reg] = regval;
+	}
+	ci->lastaddress = reg;
+	ci->regs[reg] = (ci->regs[reg] & (~mask)) | val;
+	if (!status)
+		status = regmap_write(ci->regmap, 1, ci->regs[reg]);
+	if (reg == 0x20)
+		ci->regs[reg] &= 0x7f;
+	return status;
+}
+
+static int write_reg(struct cxd *ci, u8 reg, u8 val)
+{
+	return write_regm(ci, reg, val, 0xff);
+}
+
+static int write_block(struct cxd *ci, u8 adr, u8 *data, u16 n)
+{
+	int status = 0;
+	u8 *buf = ci->wbuf;
+
+	if (ci->lastaddress != adr)
+		status = regmap_write(ci->regmap, 0, adr);
+	if (status)
+		return status;
+
+	ci->lastaddress = adr;
+	while (n) {
+		int len = n;
+
+		if (ci->cfg.max_i2c && (len + 1 > ci->cfg.max_i2c))
+			len = ci->cfg.max_i2c - 1;
+		memcpy(buf, data, len);
+		status = regmap_raw_write(ci->regmap, 1, buf, len);
+		if (status)
+			return status;
+		n -= len;
+		data += len;
+	}
+	return status;
+}
+
+static void set_mode(struct cxd *ci, int mode)
+{
+	if (mode == ci->mode)
+		return;
+
+	switch (mode) {
+	case 0x00: /* IO mem */
+		write_regm(ci, 0x06, 0x00, 0x07);
+		break;
+	case 0x01: /* ATT mem */
+		write_regm(ci, 0x06, 0x02, 0x07);
+		break;
+	default:
+		break;
+	}
+	ci->mode = mode;
+}
+
+static void cam_mode(struct cxd *ci, int mode)
+{
+	u8 dummy;
+
+	if (mode == ci->cammode)
+		return;
+
+	switch (mode) {
+	case 0x00:
+		write_regm(ci, 0x20, 0x80, 0x80);
+		break;
+	case 0x01:
+		if (!ci->en.read_data)
+			return;
+		ci->write_busy = 0;
+		dev_info(&ci->client->dev, "enable cam buffer mode\n");
+		write_reg(ci, 0x0d, 0x00);
+		write_reg(ci, 0x0e, 0x01);
+		write_regm(ci, 0x08, 0x40, 0x40);
+		read_reg(ci, 0x12, &dummy);
+		write_regm(ci, 0x08, 0x80, 0x80);
+		break;
+	default:
+		break;
+	}
+	ci->cammode = mode;
+}
+
+static int init(struct cxd *ci)
+{
+	int status;
+
+	mutex_lock(&ci->lock);
+	ci->mode = -1;
+	do {
+		status = write_reg(ci, 0x00, 0x00);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x01, 0x00);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x02, 0x10);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x03, 0x00);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x05, 0xFF);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x06, 0x1F);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x07, 0x1F);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x08, 0x28);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x14, 0x20);
+		if (status < 0)
+			break;
+
+		/* TOSTRT = 8, Mode B (gated clock), falling Edge,
+		 * Serial, POL=HIGH, MSB
+		 */
+		status = write_reg(ci, 0x0A, 0xA7);
+		if (status < 0)
+			break;
+
+		status = write_reg(ci, 0x0B, 0x33);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x0C, 0x33);
+		if (status < 0)
+			break;
+
+		status = write_regm(ci, 0x14, 0x00, 0x0F);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x15, ci->clk_reg_b);
+		if (status < 0)
+			break;
+		status = write_regm(ci, 0x16, 0x00, 0x0F);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x17, ci->clk_reg_f);
+		if (status < 0)
+			break;
+
+		if (ci->cfg.clock_mode == 2) {
+			/* bitrate*2^13/ 72000 */
+			u32 reg = ((ci->cfg.bitrate << 13) + 71999) / 72000;
+
+			if (ci->cfg.polarity) {
+				status = write_reg(ci, 0x09, 0x6f);
+				if (status < 0)
+					break;
+			} else {
+				status = write_reg(ci, 0x09, 0x6d);
+				if (status < 0)
+					break;
+			}
+			status = write_reg(ci, 0x20, 0x08);
+			if (status < 0)
+				break;
+			status = write_reg(ci, 0x21, (reg >> 8) & 0xff);
+			if (status < 0)
+				break;
+			status = write_reg(ci, 0x22, reg & 0xff);
+			if (status < 0)
+				break;
+		} else if (ci->cfg.clock_mode == 1) {
+			if (ci->cfg.polarity) {
+				status = write_reg(ci, 0x09, 0x6f); /* D */
+				if (status < 0)
+					break;
+			} else {
+				status = write_reg(ci, 0x09, 0x6d);
+				if (status < 0)
+					break;
+			}
+			status = write_reg(ci, 0x20, 0x68);
+			if (status < 0)
+				break;
+			status = write_reg(ci, 0x21, 0x00);
+			if (status < 0)
+				break;
+			status = write_reg(ci, 0x22, 0x02);
+			if (status < 0)
+				break;
+		} else {
+			if (ci->cfg.polarity) {
+				status = write_reg(ci, 0x09, 0x4f); /* C */
+				if (status < 0)
+					break;
+			} else {
+				status = write_reg(ci, 0x09, 0x4d);
+				if (status < 0)
+					break;
+			}
+			status = write_reg(ci, 0x20, 0x28);
+			if (status < 0)
+				break;
+			status = write_reg(ci, 0x21, 0x00);
+			if (status < 0)
+				break;
+			status = write_reg(ci, 0x22, 0x07);
+			if (status < 0)
+				break;
+		}
+
+		status = write_regm(ci, 0x20, 0x80, 0x80);
+		if (status < 0)
+			break;
+		status = write_regm(ci, 0x03, 0x02, 0x02);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x01, 0x04);
+		if (status < 0)
+			break;
+		status = write_reg(ci, 0x00, 0x31);
+		if (status < 0)
+			break;
+
+		/* Put TS in bypass */
+		status = write_regm(ci, 0x09, 0x08, 0x08);
+		if (status < 0)
+			break;
+		ci->cammode = -1;
+		cam_mode(ci, 0);
+	} while (0);
+	mutex_unlock(&ci->lock);
+
+	return 0;
+}
+
+static int read_attribute_mem(struct dvb_ca_en50221 *ca,
+			      int slot, int address)
+{
+	struct cxd *ci = ca->data;
+	u8 val;
+
+	mutex_lock(&ci->lock);
+	set_mode(ci, 1);
+	read_pccard(ci, address, &val, 1);
+	mutex_unlock(&ci->lock);
+	return val;
+}
+
+static int write_attribute_mem(struct dvb_ca_en50221 *ca, int slot,
+			       int address, u8 value)
+{
+	struct cxd *ci = ca->data;
+
+	mutex_lock(&ci->lock);
+	set_mode(ci, 1);
+	write_pccard(ci, address, &value, 1);
+	mutex_unlock(&ci->lock);
+	return 0;
+}
+
+static int read_cam_control(struct dvb_ca_en50221 *ca,
+			    int slot, u8 address)
+{
+	struct cxd *ci = ca->data;
+	unsigned int val;
+
+	mutex_lock(&ci->lock);
+	set_mode(ci, 0);
+	read_io(ci, address, &val);
+	mutex_unlock(&ci->lock);
+	return val;
+}
+
+static int write_cam_control(struct dvb_ca_en50221 *ca, int slot,
+			     u8 address, u8 value)
+{
+	struct cxd *ci = ca->data;
+
+	mutex_lock(&ci->lock);
+	set_mode(ci, 0);
+	write_io(ci, address, value);
+	mutex_unlock(&ci->lock);
+	return 0;
+}
+
+static int slot_reset(struct dvb_ca_en50221 *ca, int slot)
+{
+	struct cxd *ci = ca->data;
+
+	if (ci->cammode)
+		read_data(ca, slot, ci->rbuf, 0);
+
+	mutex_lock(&ci->lock);
+	cam_mode(ci, 0);
+	write_reg(ci, 0x00, 0x21);
+	write_reg(ci, 0x06, 0x1F);
+	write_reg(ci, 0x00, 0x31);
+	write_regm(ci, 0x20, 0x80, 0x80);
+	write_reg(ci, 0x03, 0x02);
+	ci->ready = 0;
+	ci->mode = -1;
+	{
+		int i;
+
+		for (i = 0; i < 100; i++) {
+			usleep_range(10000, 11000);
+			if (ci->ready)
+				break;
+		}
+	}
+	mutex_unlock(&ci->lock);
+	return 0;
+}
+
+static int slot_shutdown(struct dvb_ca_en50221 *ca, int slot)
+{
+	struct cxd *ci = ca->data;
+
+	dev_dbg(&ci->client->dev, "%s\n", __func__);
+	if (ci->cammode)
+		read_data(ca, slot, ci->rbuf, 0);
+	mutex_lock(&ci->lock);
+	write_reg(ci, 0x00, 0x21);
+	write_reg(ci, 0x06, 0x1F);
+	msleep(300);
+
+	write_regm(ci, 0x09, 0x08, 0x08);
+	write_regm(ci, 0x20, 0x80, 0x80); /* Reset CAM Mode */
+	write_regm(ci, 0x06, 0x07, 0x07); /* Clear IO Mode */
+
+	ci->mode = -1;
+	ci->write_busy = 0;
+	mutex_unlock(&ci->lock);
+	return 0;
+}
+
+static int slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
+{
+	struct cxd *ci = ca->data;
+
+	mutex_lock(&ci->lock);
+	write_regm(ci, 0x09, 0x00, 0x08);
+	set_mode(ci, 0);
+	cam_mode(ci, 1);
+	mutex_unlock(&ci->lock);
+	return 0;
+}
+
+static int campoll(struct cxd *ci)
+{
+	u8 istat;
+
+	read_reg(ci, 0x04, &istat);
+	if (!istat)
+		return 0;
+	write_reg(ci, 0x05, istat);
+
+	if (istat & 0x40)
+		ci->dr = 1;
+	if (istat & 0x20)
+		ci->write_busy = 0;
+
+	if (istat & 2) {
+		u8 slotstat;
+
+		read_reg(ci, 0x01, &slotstat);
+		if (!(2 & slotstat)) {
+			if (!ci->slot_stat) {
+				ci->slot_stat |=
+					      DVB_CA_EN50221_POLL_CAM_PRESENT;
+				write_regm(ci, 0x03, 0x08, 0x08);
+			}
+
+		} else {
+			if (ci->slot_stat) {
+				ci->slot_stat = 0;
+				write_regm(ci, 0x03, 0x00, 0x08);
+				dev_info(&ci->client->dev, "NO CAM\n");
+				ci->ready = 0;
+			}
+		}
+		if ((istat & 8) &&
+		    ci->slot_stat == DVB_CA_EN50221_POLL_CAM_PRESENT) {
+			ci->ready = 1;
+			ci->slot_stat |= DVB_CA_EN50221_POLL_CAM_READY;
+		}
+	}
+	return 0;
+}
+
+static int poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
+{
+	struct cxd *ci = ca->data;
+	u8 slotstat;
+
+	mutex_lock(&ci->lock);
+	campoll(ci);
+	read_reg(ci, 0x01, &slotstat);
+	mutex_unlock(&ci->lock);
+
+	return ci->slot_stat;
+}
+
+static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
+{
+	struct cxd *ci = ca->data;
+	u8 msb, lsb;
+	u16 len;
+
+	mutex_lock(&ci->lock);
+	campoll(ci);
+	mutex_unlock(&ci->lock);
+
+	if (!ci->dr)
+		return 0;
+
+	mutex_lock(&ci->lock);
+	read_reg(ci, 0x0f, &msb);
+	read_reg(ci, 0x10, &lsb);
+	len = ((u16)msb << 8) | lsb;
+	if (len > ecount || len < 2) {
+		/* read it anyway or cxd may hang */
+		read_block(ci, 0x12, ci->rbuf, len);
+		mutex_unlock(&ci->lock);
+		return -EIO;
+	}
+	read_block(ci, 0x12, ebuf, len);
+	ci->dr = 0;
+	mutex_unlock(&ci->lock);
+	return len;
+}
+
+static int write_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
+{
+	struct cxd *ci = ca->data;
+
+	if (ci->write_busy)
+		return -EAGAIN;
+	mutex_lock(&ci->lock);
+	write_reg(ci, 0x0d, ecount >> 8);
+	write_reg(ci, 0x0e, ecount & 0xff);
+	write_block(ci, 0x11, ebuf, ecount);
+	ci->write_busy = 1;
+	mutex_unlock(&ci->lock);
+	return ecount;
+}
+
+static const struct dvb_ca_en50221 en_templ = {
+	.read_attribute_mem  = read_attribute_mem,
+	.write_attribute_mem = write_attribute_mem,
+	.read_cam_control    = read_cam_control,
+	.write_cam_control   = write_cam_control,
+	.slot_reset          = slot_reset,
+	.slot_shutdown       = slot_shutdown,
+	.slot_ts_enable      = slot_ts_enable,
+	.poll_slot_status    = poll_slot_status,
+	.read_data           = read_data,
+	.write_data          = write_data,
+};
+
+static int cxd2099_probe(struct i2c_client *client)
+{
+	struct cxd *ci;
+	struct cxd2099_cfg *cfg = client->dev.platform_data;
+	static const struct regmap_config rm_cfg = {
+		.reg_bits = 8,
+		.val_bits = 8,
+	};
+	unsigned int val;
+	int ret;
+
+	ci = kzalloc(sizeof(*ci), GFP_KERNEL);
+	if (!ci) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	ci->client = client;
+	memcpy(&ci->cfg, cfg, sizeof(ci->cfg));
+
+	ci->regmap = regmap_init_i2c(client, &rm_cfg);
+	if (IS_ERR(ci->regmap)) {
+		ret = PTR_ERR(ci->regmap);
+		goto err_kfree;
+	}
+
+	ret = regmap_read(ci->regmap, 0x00, &val);
+	if (ret < 0) {
+		dev_info(&client->dev, "No CXD2099AR detected at 0x%02x\n",
+			 client->addr);
+		goto err_rmexit;
+	}
+
+	mutex_init(&ci->lock);
+	ci->lastaddress = 0xff;
+	ci->clk_reg_b = 0x4a;
+	ci->clk_reg_f = 0x1b;
+
+	ci->en = en_templ;
+	ci->en.data = ci;
+	init(ci);
+	dev_info(&client->dev, "Attached CXD2099AR at 0x%02x\n", client->addr);
+
+	*cfg->en = &ci->en;
+
+	if (!buffermode) {
+		ci->en.read_data = NULL;
+		ci->en.write_data = NULL;
+	} else {
+		dev_info(&client->dev, "Using CXD2099AR buffer mode");
+	}
+
+	i2c_set_clientdata(client, ci);
+
+	return 0;
+
+err_rmexit:
+	regmap_exit(ci->regmap);
+err_kfree:
+	kfree(ci);
+err:
+
+	return ret;
+}
+
+static void cxd2099_remove(struct i2c_client *client)
+{
+	struct cxd *ci = i2c_get_clientdata(client);
+
+	regmap_exit(ci->regmap);
+	kfree(ci);
+}
+
+static const struct i2c_device_id cxd2099_id[] = {
+	{"cxd2099", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, cxd2099_id);
+
+static struct i2c_driver cxd2099_driver = {
+	.driver = {
+		.name	= "cxd2099",
+	},
+	.probe_new	= cxd2099_probe,
+	.remove		= cxd2099_remove,
+	.id_table	= cxd2099_id,
+};
+
+module_i2c_driver(cxd2099_driver);
+
+MODULE_DESCRIPTION("Sony CXD2099AR Common Interface controller driver");
+MODULE_AUTHOR("Ralph Metzler");
+MODULE_LICENSE("GPL v2");