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, 548 insertions, 0 deletions

diff --git a/drivers/input/joystick/adi.c b/drivers/input/joystick/adi.c
new file mode 100644
index 000000000..f1a720be4
--- /dev/null
+++ b/drivers/input/joystick/adi.c
@@ -0,0 +1,548 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1998-2005 Vojtech Pavlik
+ */
+
+/*
+ * Logitech ADI joystick family driver for Linux
+ */
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/gameport.h>
+#include <linux/jiffies.h>
+
+#define DRIVER_DESC	"Logitech ADI joystick family driver"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+/*
+ * Times, array sizes, flags, ids.
+ */
+
+#define ADI_MAX_START		200	/* Trigger to packet timeout [200us] */
+#define ADI_MAX_STROBE		40	/* Single bit timeout [40us] */
+#define ADI_INIT_DELAY		10	/* Delay after init packet [10ms] */
+#define ADI_DATA_DELAY		4	/* Delay after data packet [4ms] */
+
+#define ADI_MAX_LENGTH		256
+#define ADI_MIN_LENGTH		8
+#define ADI_MIN_LEN_LENGTH	10
+#define ADI_MIN_ID_LENGTH	66
+#define ADI_MAX_NAME_LENGTH	64
+#define ADI_MAX_CNAME_LENGTH	16
+#define ADI_MAX_PHYS_LENGTH	64
+
+#define ADI_FLAG_HAT		0x04
+#define ADI_FLAG_10BIT		0x08
+
+#define ADI_ID_TPD		0x01
+#define ADI_ID_WGP		0x06
+#define ADI_ID_WGPE		0x08
+#define ADI_ID_MAX		0x0a
+
+/*
+ * Names, buttons, axes ...
+ */
+
+static char *adi_names[] = {	"WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2",
+				"WingMan Interceptor", "WingMan Formula", "WingMan GamePad",
+				"WingMan Extreme Digital 3D", "WingMan GamePad Extreme",
+				"WingMan GamePad USB", "Unknown Device %#x" };
+
+static char adi_wmgpe_abs[] =	{ ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y };
+static char adi_wmi_abs[] =	{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
+static char adi_wmed3d_abs[] =	{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y };
+static char adi_cm2_abs[] =	{ ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
+static char adi_wmf_abs[] =	{ ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y };
+
+static short adi_wmgpe_key[] =	{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,  BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT };
+static short adi_wmi_key[] =	{ BTN_TRIGGER,  BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA };
+static short adi_wmed3d_key[] =	{ BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 };
+static short adi_cm2_key[] =	{ BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 };
+
+static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs,
+			   adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs };
+
+static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key,
+			    adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key };
+
+/*
+ * Hat to axis conversion arrays.
+ */
+
+static struct {
+	int x;
+	int y;
+} adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
+
+/*
+ * Per-port information.
+ */
+
+struct adi {
+	struct input_dev *dev;
+	int length;
+	int ret;
+	int idx;
+	unsigned char id;
+	char buttons;
+	char axes10;
+	char axes8;
+	signed char pad;
+	char hats;
+	char *abs;
+	short *key;
+	char name[ADI_MAX_NAME_LENGTH];
+	char cname[ADI_MAX_CNAME_LENGTH];
+	char phys[ADI_MAX_PHYS_LENGTH];
+	unsigned char data[ADI_MAX_LENGTH];
+};
+
+struct adi_port {
+	struct gameport *gameport;
+	struct adi adi[2];
+	int bad;
+	int reads;
+};
+
+/*
+ * adi_read_packet() reads a Logitech ADI packet.
+ */
+
+static void adi_read_packet(struct adi_port *port)
+{
+	struct adi *adi = port->adi;
+	struct gameport *gameport = port->gameport;
+	unsigned char u, v, w, x;
+	int t[2], s[2], i;
+	unsigned long flags;
+
+	for (i = 0; i < 2; i++) {
+		adi[i].ret = -1;
+		t[i] = gameport_time(gameport, ADI_MAX_START);
+		s[i] = 0;
+	}
+
+	local_irq_save(flags);
+
+	gameport_trigger(gameport);
+	v = gameport_read(gameport);
+
+	do {
+		u = v;
+		w = u ^ (v = x = gameport_read(gameport));
+		for (i = 0; i < 2; i++, w >>= 2, x >>= 2) {
+			t[i]--;
+			if ((w & 0x30) && s[i]) {
+				if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) {
+					adi[i].data[++adi[i].ret] = w;
+					t[i] = gameport_time(gameport, ADI_MAX_STROBE);
+				} else t[i] = 0;
+			} else if (!(x & 0x30)) s[i] = 1;
+		}
+	} while (t[0] > 0 || t[1] > 0);
+
+	local_irq_restore(flags);
+
+	return;
+}
+
+/*
+ * adi_move_bits() detects a possible 2-stream mode, and moves
+ * the bits accordingly.
+ */
+
+static void adi_move_bits(struct adi_port *port, int length)
+{
+	int i;
+	struct adi *adi = port->adi;
+
+	adi[0].idx = adi[1].idx = 0;
+
+	if (adi[0].ret <= 0 || adi[1].ret <= 0) return;
+	if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return;
+
+	for (i = 1; i <= adi[1].ret; i++)
+		adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i];
+
+	adi[0].ret += adi[1].ret;
+	adi[1].ret = -1;
+}
+
+/*
+ * adi_get_bits() gathers bits from the data packet.
+ */
+
+static inline int adi_get_bits(struct adi *adi, int count)
+{
+	int bits = 0;
+	int i;
+	if ((adi->idx += count) > adi->ret) return 0;
+	for (i = 0; i < count; i++)
+		bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i;
+	return bits;
+}
+
+/*
+ * adi_decode() decodes Logitech joystick data into input events.
+ */
+
+static int adi_decode(struct adi *adi)
+{
+	struct input_dev *dev = adi->dev;
+	char *abs = adi->abs;
+	short *key = adi->key;
+	int i, t;
+
+	if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4)))
+		return -1;
+
+	for (i = 0; i < adi->axes10; i++)
+		input_report_abs(dev, *abs++, adi_get_bits(adi, 10));
+
+	for (i = 0; i < adi->axes8; i++)
+		input_report_abs(dev, *abs++, adi_get_bits(adi, 8));
+
+	for (i = 0; i < adi->buttons && i < 63; i++) {
+		if (i == adi->pad) {
+			t = adi_get_bits(adi, 4);
+			input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t       & 1));
+			input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1));
+		}
+		input_report_key(dev, *key++, adi_get_bits(adi, 1));
+	}
+
+	for (i = 0; i < adi->hats; i++) {
+		if ((t = adi_get_bits(adi, 4)) > 8) t = 0;
+		input_report_abs(dev, *abs++, adi_hat_to_axis[t].x);
+		input_report_abs(dev, *abs++, adi_hat_to_axis[t].y);
+	}
+
+	for (i = 63; i < adi->buttons; i++)
+		input_report_key(dev, *key++, adi_get_bits(adi, 1));
+
+	input_sync(dev);
+
+	return 0;
+}
+
+/*
+ * adi_read() reads the data packet and decodes it.
+ */
+
+static int adi_read(struct adi_port *port)
+{
+	int i;
+	int result = 0;
+
+	adi_read_packet(port);
+	adi_move_bits(port, port->adi[0].length);
+
+	for (i = 0; i < 2; i++)
+		if (port->adi[i].length)
+			 result |= adi_decode(port->adi + i);
+
+	return result;
+}
+
+/*
+ * adi_poll() repeatedly polls the Logitech joysticks.
+ */
+
+static void adi_poll(struct gameport *gameport)
+{
+	struct adi_port *port = gameport_get_drvdata(gameport);
+
+	port->bad -= adi_read(port);
+	port->reads++;
+}
+
+/*
+ * adi_open() is a callback from the input open routine.
+ */
+
+static int adi_open(struct input_dev *dev)
+{
+	struct adi_port *port = input_get_drvdata(dev);
+
+	gameport_start_polling(port->gameport);
+	return 0;
+}
+
+/*
+ * adi_close() is a callback from the input close routine.
+ */
+
+static void adi_close(struct input_dev *dev)
+{
+	struct adi_port *port = input_get_drvdata(dev);
+
+	gameport_stop_polling(port->gameport);
+}
+
+/*
+ * adi_init_digital() sends a trigger & delay sequence
+ * to reset and initialize a Logitech joystick into digital mode.
+ */
+
+static void adi_init_digital(struct gameport *gameport)
+{
+	static const int seq[] = { 4, -2, -3, 10, -6, -11, -7, -9, 11, 0 };
+	int i;
+
+	for (i = 0; seq[i]; i++) {
+		gameport_trigger(gameport);
+		if (seq[i] > 0)
+			msleep(seq[i]);
+		if (seq[i] < 0) {
+			mdelay(-seq[i]);
+			udelay(-seq[i]*14);	/* It looks like mdelay() is off by approx 1.4% */
+		}
+	}
+}
+
+static void adi_id_decode(struct adi *adi, struct adi_port *port)
+{
+	int i, t;
+
+	if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */
+		return;
+
+	if (adi->ret < (t = adi_get_bits(adi, 10))) {
+		printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret);
+		return;
+	}
+
+	adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4);
+
+	if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++;
+
+	adi->length = adi_get_bits(adi, 10);
+
+	if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) {
+		printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length);
+		adi->length = 0;
+		return;
+	}
+
+	adi->axes8 = adi_get_bits(adi, 4);
+	adi->buttons = adi_get_bits(adi, 6);
+
+	if (adi_get_bits(adi, 6) != 8 && adi->hats) {
+		printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n");
+		adi->length = 0;
+		return;
+	}
+
+	adi->buttons += adi_get_bits(adi, 6);
+	adi->hats += adi_get_bits(adi, 4);
+
+	i = adi_get_bits(adi, 4);
+
+	if (t & ADI_FLAG_10BIT) {
+		adi->axes10 = adi->axes8 - i;
+		adi->axes8 = i;
+	}
+
+	t = adi_get_bits(adi, 4);
+
+	for (i = 0; i < t; i++)
+		adi->cname[i] = adi_get_bits(adi, 8);
+	adi->cname[i] = 0;
+
+	t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4;
+	if (adi->length != t && adi->length != t + (t & 1)) {
+		printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length);
+		adi->length = 0;
+		return;
+	}
+
+	switch (adi->id) {
+		case ADI_ID_TPD:
+			adi->pad = 4;
+			adi->buttons -= 4;
+			break;
+		case ADI_ID_WGP:
+			adi->pad = 0;
+			adi->buttons -= 4;
+			break;
+		default:
+			adi->pad = -1;
+			break;
+	}
+}
+
+static int adi_init_input(struct adi *adi, struct adi_port *port, int half)
+{
+	struct input_dev *input_dev;
+	char buf[ADI_MAX_NAME_LENGTH];
+	int i, t;
+
+	adi->dev = input_dev = input_allocate_device();
+	if (!input_dev)
+		return -ENOMEM;
+
+	t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX;
+
+	snprintf(buf, ADI_MAX_PHYS_LENGTH, adi_names[t], adi->id);
+	snprintf(adi->name, ADI_MAX_NAME_LENGTH, "Logitech %s [%s]", buf, adi->cname);
+	snprintf(adi->phys, ADI_MAX_PHYS_LENGTH, "%s/input%d", port->gameport->phys, half);
+
+	adi->abs = adi_abs[t];
+	adi->key = adi_key[t];
+
+	input_dev->name = adi->name;
+	input_dev->phys = adi->phys;
+	input_dev->id.bustype = BUS_GAMEPORT;
+	input_dev->id.vendor = GAMEPORT_ID_VENDOR_LOGITECH;
+	input_dev->id.product = adi->id;
+	input_dev->id.version = 0x0100;
+	input_dev->dev.parent = &port->gameport->dev;
+
+	input_set_drvdata(input_dev, port);
+
+	input_dev->open = adi_open;
+	input_dev->close = adi_close;
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+
+	for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++)
+		set_bit(adi->abs[i], input_dev->absbit);
+
+	for (i = 0; i < adi->buttons; i++)
+		set_bit(adi->key[i], input_dev->keybit);
+
+	return 0;
+}
+
+static void adi_init_center(struct adi *adi)
+{
+	int i, t, x;
+
+	if (!adi->length)
+		return;
+
+	for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) {
+
+		t = adi->abs[i];
+		x = input_abs_get_val(adi->dev, t);
+
+		if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE)
+			x = i < adi->axes10 ? 512 : 128;
+
+		if (i < adi->axes10)
+			input_set_abs_params(adi->dev, t, 64, x * 2 - 64, 2, 16);
+		else if (i < adi->axes10 + adi->axes8)
+			input_set_abs_params(adi->dev, t, 48, x * 2 - 48, 1, 16);
+		else
+			input_set_abs_params(adi->dev, t, -1, 1, 0, 0);
+	}
+}
+
+/*
+ * adi_connect() probes for Logitech ADI joysticks.
+ */
+
+static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
+{
+	struct adi_port *port;
+	int i;
+	int err;
+
+	port = kzalloc(sizeof(struct adi_port), GFP_KERNEL);
+	if (!port)
+		return -ENOMEM;
+
+	port->gameport = gameport;
+
+	gameport_set_drvdata(gameport, port);
+
+	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
+	if (err)
+		goto fail1;
+
+	adi_init_digital(gameport);
+	adi_read_packet(port);
+
+	if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH)
+		adi_move_bits(port, adi_get_bits(port->adi, 10));
+
+	for (i = 0; i < 2; i++) {
+		adi_id_decode(port->adi + i, port);
+
+		if (!port->adi[i].length)
+			continue;
+
+		err = adi_init_input(port->adi + i, port, i);
+		if (err)
+			goto fail2;
+	}
+
+	if (!port->adi[0].length && !port->adi[1].length) {
+		err = -ENODEV;
+		goto fail2;
+	}
+
+	gameport_set_poll_handler(gameport, adi_poll);
+	gameport_set_poll_interval(gameport, 20);
+
+	msleep(ADI_INIT_DELAY);
+	if (adi_read(port)) {
+		msleep(ADI_DATA_DELAY);
+		adi_read(port);
+	}
+
+	for (i = 0; i < 2; i++)
+		if (port->adi[i].length > 0) {
+			adi_init_center(port->adi + i);
+			err = input_register_device(port->adi[i].dev);
+			if (err)
+				goto fail3;
+		}
+
+	return 0;
+
+ fail3: while (--i >= 0) {
+		if (port->adi[i].length > 0) {
+			input_unregister_device(port->adi[i].dev);
+			port->adi[i].dev = NULL;
+		}
+	}
+ fail2:	for (i = 0; i < 2; i++)
+		input_free_device(port->adi[i].dev);
+	gameport_close(gameport);
+ fail1:	gameport_set_drvdata(gameport, NULL);
+	kfree(port);
+	return err;
+}
+
+static void adi_disconnect(struct gameport *gameport)
+{
+	int i;
+	struct adi_port *port = gameport_get_drvdata(gameport);
+
+	for (i = 0; i < 2; i++)
+		if (port->adi[i].length > 0)
+			input_unregister_device(port->adi[i].dev);
+	gameport_close(gameport);
+	gameport_set_drvdata(gameport, NULL);
+	kfree(port);
+}
+
+static struct gameport_driver adi_drv = {
+	.driver		= {
+		.name	= "adi",
+	},
+	.description	= DRIVER_DESC,
+	.connect	= adi_connect,
+	.disconnect	= adi_disconnect,
+};
+
+module_gameport_driver(adi_drv);