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, 1051 insertions, 0 deletions

diff --git a/drivers/input/joystick/gamecon.c b/drivers/input/joystick/gamecon.c
new file mode 100644
index 000000000..41d5dac05
--- /dev/null
+++ b/drivers/input/joystick/gamecon.c
@@ -0,0 +1,1051 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * NES, SNES, N64, MultiSystem, PSX gamepad driver for Linux
+ *
+ *  Copyright (c) 1999-2004	Vojtech Pavlik <vojtech@suse.cz>
+ *  Copyright (c) 2004		Peter Nelson <rufus-kernel@hackish.org>
+ *
+ *  Based on the work of:
+ *	Andree Borrmann		John Dahlstrom
+ *	David Kuder		Nathan Hand
+ *	Raphael Assenat
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/parport.h>
+#include <linux/input.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION("NES, SNES, N64, MultiSystem, PSX gamepad driver");
+MODULE_LICENSE("GPL");
+
+#define GC_MAX_PORTS		3
+#define GC_MAX_DEVICES		5
+
+struct gc_config {
+	int args[GC_MAX_DEVICES + 1];
+	unsigned int nargs;
+};
+
+static struct gc_config gc_cfg[GC_MAX_PORTS];
+
+module_param_array_named(map, gc_cfg[0].args, int, &gc_cfg[0].nargs, 0);
+MODULE_PARM_DESC(map, "Describes first set of devices (<parport#>,<pad1>,<pad2>,..<pad5>)");
+module_param_array_named(map2, gc_cfg[1].args, int, &gc_cfg[1].nargs, 0);
+MODULE_PARM_DESC(map2, "Describes second set of devices");
+module_param_array_named(map3, gc_cfg[2].args, int, &gc_cfg[2].nargs, 0);
+MODULE_PARM_DESC(map3, "Describes third set of devices");
+
+/* see also gs_psx_delay parameter in PSX support section */
+
+enum gc_type {
+	GC_NONE = 0,
+	GC_SNES,
+	GC_NES,
+	GC_NES4,
+	GC_MULTI,
+	GC_MULTI2,
+	GC_N64,
+	GC_PSX,
+	GC_DDR,
+	GC_SNESMOUSE,
+	GC_MAX
+};
+
+#define GC_REFRESH_TIME	HZ/100
+
+struct gc_pad {
+	struct input_dev *dev;
+	enum gc_type type;
+	char phys[32];
+};
+
+struct gc {
+	struct pardevice *pd;
+	struct gc_pad pads[GC_MAX_DEVICES];
+	struct timer_list timer;
+	int pad_count[GC_MAX];
+	int used;
+	int parportno;
+	struct mutex mutex;
+};
+
+struct gc_subdev {
+	unsigned int idx;
+};
+
+static struct gc *gc_base[3];
+
+static const int gc_status_bit[] = { 0x40, 0x80, 0x20, 0x10, 0x08 };
+
+static const char *gc_names[] = {
+	NULL, "SNES pad", "NES pad", "NES FourPort", "Multisystem joystick",
+	"Multisystem 2-button joystick", "N64 controller", "PSX controller",
+	"PSX DDR controller", "SNES mouse"
+};
+
+/*
+ * N64 support.
+ */
+
+static const unsigned char gc_n64_bytes[] = { 0, 1, 13, 15, 14, 12, 10, 11, 2, 3 };
+static const short gc_n64_btn[] = {
+	BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z,
+	BTN_TL, BTN_TR, BTN_TRIGGER, BTN_START
+};
+
+#define GC_N64_LENGTH		32		/* N64 bit length, not including stop bit */
+#define GC_N64_STOP_LENGTH	5		/* Length of encoded stop bit */
+#define GC_N64_CMD_00		0x11111111UL
+#define GC_N64_CMD_01		0xd1111111UL
+#define GC_N64_CMD_03		0xdd111111UL
+#define GC_N64_CMD_1b		0xdd1dd111UL
+#define GC_N64_CMD_c0		0x111111ddUL
+#define GC_N64_CMD_80		0x1111111dUL
+#define GC_N64_STOP_BIT		0x1d		/* Encoded stop bit */
+#define GC_N64_REQUEST_DATA	GC_N64_CMD_01	/* the request data command */
+#define GC_N64_DELAY		133		/* delay between transmit request, and response ready (us) */
+#define GC_N64_DWS		3		/* delay between write segments (required for sound playback because of ISA DMA) */
+						/* GC_N64_DWS > 24 is known to fail */
+#define GC_N64_POWER_W		0xe2		/* power during write (transmit request) */
+#define GC_N64_POWER_R		0xfd		/* power during read */
+#define GC_N64_OUT		0x1d		/* output bits to the 4 pads */
+						/* Reading the main axes of any N64 pad is known to fail if the corresponding bit */
+						/* in GC_N64_OUT is pulled low on the output port (by any routine) for more */
+						/* than 123 us */
+#define GC_N64_CLOCK		0x02		/* clock bits for read */
+
+/*
+ * Used for rumble code.
+ */
+
+/* Send encoded command */
+static void gc_n64_send_command(struct gc *gc, unsigned long cmd,
+				unsigned char target)
+{
+	struct parport *port = gc->pd->port;
+	int i;
+
+	for (i = 0; i < GC_N64_LENGTH; i++) {
+		unsigned char data = (cmd >> i) & 1 ? target : 0;
+		parport_write_data(port, GC_N64_POWER_W | data);
+		udelay(GC_N64_DWS);
+	}
+}
+
+/* Send stop bit */
+static void gc_n64_send_stop_bit(struct gc *gc, unsigned char target)
+{
+	struct parport *port = gc->pd->port;
+	int i;
+
+	for (i = 0; i < GC_N64_STOP_LENGTH; i++) {
+		unsigned char data = (GC_N64_STOP_BIT >> i) & 1 ? target : 0;
+		parport_write_data(port, GC_N64_POWER_W | data);
+		udelay(GC_N64_DWS);
+	}
+}
+
+/*
+ * gc_n64_read_packet() reads an N64 packet.
+ * Each pad uses one bit per byte. So all pads connected to this port
+ * are read in parallel.
+ */
+
+static void gc_n64_read_packet(struct gc *gc, unsigned char *data)
+{
+	int i;
+	unsigned long flags;
+
+/*
+ * Request the pad to transmit data
+ */
+
+	local_irq_save(flags);
+	gc_n64_send_command(gc, GC_N64_REQUEST_DATA, GC_N64_OUT);
+	gc_n64_send_stop_bit(gc, GC_N64_OUT);
+	local_irq_restore(flags);
+
+/*
+ * Wait for the pad response to be loaded into the 33-bit register
+ * of the adapter.
+ */
+
+	udelay(GC_N64_DELAY);
+
+/*
+ * Grab data (ignoring the last bit, which is a stop bit)
+ */
+
+	for (i = 0; i < GC_N64_LENGTH; i++) {
+		parport_write_data(gc->pd->port, GC_N64_POWER_R);
+		udelay(2);
+		data[i] = parport_read_status(gc->pd->port);
+		parport_write_data(gc->pd->port, GC_N64_POWER_R | GC_N64_CLOCK);
+	 }
+
+/*
+ * We must wait 200 ms here for the controller to reinitialize before
+ * the next read request. No worries as long as gc_read is polled less
+ * frequently than this.
+ */
+
+}
+
+static void gc_n64_process_packet(struct gc *gc)
+{
+	unsigned char data[GC_N64_LENGTH];
+	struct input_dev *dev;
+	int i, j, s;
+	signed char x, y;
+
+	gc_n64_read_packet(gc, data);
+
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+
+		if (gc->pads[i].type != GC_N64)
+			continue;
+
+		dev = gc->pads[i].dev;
+		s = gc_status_bit[i];
+
+		if (s & ~(data[8] | data[9])) {
+
+			x = y = 0;
+
+			for (j = 0; j < 8; j++) {
+				if (data[23 - j] & s)
+					x |= 1 << j;
+				if (data[31 - j] & s)
+					y |= 1 << j;
+			}
+
+			input_report_abs(dev, ABS_X,  x);
+			input_report_abs(dev, ABS_Y, -y);
+
+			input_report_abs(dev, ABS_HAT0X,
+					 !(s & data[6]) - !(s & data[7]));
+			input_report_abs(dev, ABS_HAT0Y,
+					 !(s & data[4]) - !(s & data[5]));
+
+			for (j = 0; j < 10; j++)
+				input_report_key(dev, gc_n64_btn[j],
+						 s & data[gc_n64_bytes[j]]);
+
+			input_sync(dev);
+		}
+	}
+}
+
+static int gc_n64_play_effect(struct input_dev *dev, void *data,
+			      struct ff_effect *effect)
+{
+	int i;
+	unsigned long flags;
+	struct gc *gc = input_get_drvdata(dev);
+	struct gc_subdev *sdev = data;
+	unsigned char target = 1 << sdev->idx; /* select desired pin */
+
+	if (effect->type == FF_RUMBLE) {
+		struct ff_rumble_effect *rumble = &effect->u.rumble;
+		unsigned int cmd =
+			rumble->strong_magnitude || rumble->weak_magnitude ?
+			GC_N64_CMD_01 : GC_N64_CMD_00;
+
+		local_irq_save(flags);
+
+		/* Init Rumble - 0x03, 0x80, 0x01, (34)0x80 */
+		gc_n64_send_command(gc, GC_N64_CMD_03, target);
+		gc_n64_send_command(gc, GC_N64_CMD_80, target);
+		gc_n64_send_command(gc, GC_N64_CMD_01, target);
+		for (i = 0; i < 32; i++)
+			gc_n64_send_command(gc, GC_N64_CMD_80, target);
+		gc_n64_send_stop_bit(gc, target);
+
+		udelay(GC_N64_DELAY);
+
+		/* Now start or stop it - 0x03, 0xc0, 0zx1b, (32)0x01/0x00 */
+		gc_n64_send_command(gc, GC_N64_CMD_03, target);
+		gc_n64_send_command(gc, GC_N64_CMD_c0, target);
+		gc_n64_send_command(gc, GC_N64_CMD_1b, target);
+		for (i = 0; i < 32; i++)
+			gc_n64_send_command(gc, cmd, target);
+		gc_n64_send_stop_bit(gc, target);
+
+		local_irq_restore(flags);
+
+	}
+
+	return 0;
+}
+
+static int gc_n64_init_ff(struct input_dev *dev, int i)
+{
+	struct gc_subdev *sdev;
+	int err;
+
+	sdev = kmalloc(sizeof(*sdev), GFP_KERNEL);
+	if (!sdev)
+		return -ENOMEM;
+
+	sdev->idx = i;
+
+	input_set_capability(dev, EV_FF, FF_RUMBLE);
+
+	err = input_ff_create_memless(dev, sdev, gc_n64_play_effect);
+	if (err) {
+		kfree(sdev);
+		return err;
+	}
+
+	return 0;
+}
+
+/*
+ * NES/SNES support.
+ */
+
+#define GC_NES_DELAY		6	/* Delay between bits - 6us */
+#define GC_NES_LENGTH		8	/* The NES pads use 8 bits of data */
+#define GC_SNES_LENGTH		12	/* The SNES true length is 16, but the
+					   last 4 bits are unused */
+#define GC_SNESMOUSE_LENGTH	32	/* The SNES mouse uses 32 bits, the first
+					   16 bits are equivalent to a gamepad */
+
+#define GC_NES_POWER	0xfc
+#define GC_NES_CLOCK	0x01
+#define GC_NES_LATCH	0x02
+
+static const unsigned char gc_nes_bytes[] = { 0, 1, 2, 3 };
+static const unsigned char gc_snes_bytes[] = { 8, 0, 2, 3, 9, 1, 10, 11 };
+static const short gc_snes_btn[] = {
+	BTN_A, BTN_B, BTN_SELECT, BTN_START, BTN_X, BTN_Y, BTN_TL, BTN_TR
+};
+
+/*
+ * gc_nes_read_packet() reads a NES/SNES packet.
+ * Each pad uses one bit per byte. So all pads connected to
+ * this port are read in parallel.
+ */
+
+static void gc_nes_read_packet(struct gc *gc, int length, unsigned char *data)
+{
+	int i;
+
+	parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK | GC_NES_LATCH);
+	udelay(GC_NES_DELAY * 2);
+	parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
+
+	for (i = 0; i < length; i++) {
+		udelay(GC_NES_DELAY);
+		parport_write_data(gc->pd->port, GC_NES_POWER);
+		data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
+		udelay(GC_NES_DELAY);
+		parport_write_data(gc->pd->port, GC_NES_POWER | GC_NES_CLOCK);
+	}
+}
+
+static void gc_nes_process_packet(struct gc *gc)
+{
+	unsigned char data[GC_SNESMOUSE_LENGTH];
+	struct gc_pad *pad;
+	struct input_dev *dev;
+	int i, j, s, len;
+	char x_rel, y_rel;
+
+	len = gc->pad_count[GC_SNESMOUSE] ? GC_SNESMOUSE_LENGTH :
+			(gc->pad_count[GC_SNES] ? GC_SNES_LENGTH : GC_NES_LENGTH);
+
+	gc_nes_read_packet(gc, len, data);
+
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+
+		pad = &gc->pads[i];
+		dev = pad->dev;
+		s = gc_status_bit[i];
+
+		switch (pad->type) {
+
+		case GC_NES:
+
+			input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
+			input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
+
+			for (j = 0; j < 4; j++)
+				input_report_key(dev, gc_snes_btn[j],
+						 s & data[gc_nes_bytes[j]]);
+			input_sync(dev);
+			break;
+
+		case GC_SNES:
+
+			input_report_abs(dev, ABS_X, !(s & data[6]) - !(s & data[7]));
+			input_report_abs(dev, ABS_Y, !(s & data[4]) - !(s & data[5]));
+
+			for (j = 0; j < 8; j++)
+				input_report_key(dev, gc_snes_btn[j],
+						 s & data[gc_snes_bytes[j]]);
+			input_sync(dev);
+			break;
+
+		case GC_SNESMOUSE:
+			/*
+			 * The 4 unused bits from SNES controllers appear
+			 * to be ID bits so use them to make sure we are
+			 * dealing with a mouse.
+			 * gamepad is connected. This is important since
+			 * my SNES gamepad sends 1's for bits 16-31, which
+			 * cause the mouse pointer to quickly move to the
+			 * upper left corner of the screen.
+			 */
+			if (!(s & data[12]) && !(s & data[13]) &&
+			    !(s & data[14]) && (s & data[15])) {
+				input_report_key(dev, BTN_LEFT, s & data[9]);
+				input_report_key(dev, BTN_RIGHT, s & data[8]);
+
+				x_rel = y_rel = 0;
+				for (j = 0; j < 7; j++) {
+					x_rel <<= 1;
+					if (data[25 + j] & s)
+						x_rel |= 1;
+
+					y_rel <<= 1;
+					if (data[17 + j] & s)
+						y_rel |= 1;
+				}
+
+				if (x_rel) {
+					if (data[24] & s)
+						x_rel = -x_rel;
+					input_report_rel(dev, REL_X, x_rel);
+				}
+
+				if (y_rel) {
+					if (data[16] & s)
+						y_rel = -y_rel;
+					input_report_rel(dev, REL_Y, y_rel);
+				}
+
+				input_sync(dev);
+			}
+			break;
+
+		default:
+			break;
+		}
+	}
+}
+
+/*
+ * Multisystem joystick support
+ */
+
+#define GC_MULTI_LENGTH		5	/* Multi system joystick packet length is 5 */
+#define GC_MULTI2_LENGTH	6	/* One more bit for one more button */
+
+/*
+ * gc_multi_read_packet() reads a Multisystem joystick packet.
+ */
+
+static void gc_multi_read_packet(struct gc *gc, int length, unsigned char *data)
+{
+	int i;
+
+	for (i = 0; i < length; i++) {
+		parport_write_data(gc->pd->port, ~(1 << i));
+		data[i] = parport_read_status(gc->pd->port) ^ 0x7f;
+	}
+}
+
+static void gc_multi_process_packet(struct gc *gc)
+{
+	unsigned char data[GC_MULTI2_LENGTH];
+	int data_len = gc->pad_count[GC_MULTI2] ? GC_MULTI2_LENGTH : GC_MULTI_LENGTH;
+	struct gc_pad *pad;
+	struct input_dev *dev;
+	int i, s;
+
+	gc_multi_read_packet(gc, data_len, data);
+
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+		pad = &gc->pads[i];
+		dev = pad->dev;
+		s = gc_status_bit[i];
+
+		switch (pad->type) {
+		case GC_MULTI2:
+			input_report_key(dev, BTN_THUMB, s & data[5]);
+			fallthrough;
+
+		case GC_MULTI:
+			input_report_abs(dev, ABS_X,
+					 !(s & data[2]) - !(s & data[3]));
+			input_report_abs(dev, ABS_Y,
+					 !(s & data[0]) - !(s & data[1]));
+			input_report_key(dev, BTN_TRIGGER, s & data[4]);
+			input_sync(dev);
+			break;
+
+		default:
+			break;
+		}
+	}
+}
+
+/*
+ * PSX support
+ *
+ * See documentation at:
+ *	http://www.geocities.co.jp/Playtown/2004/psx/ps_eng.txt	
+ *	http://www.gamesx.com/controldata/psxcont/psxcont.htm
+ *
+ */
+
+#define GC_PSX_DELAY	25		/* 25 usec */
+#define GC_PSX_LENGTH	8		/* talk to the controller in bits */
+#define GC_PSX_BYTES	6		/* the maximum number of bytes to read off the controller */
+
+#define GC_PSX_MOUSE	1		/* Mouse */
+#define GC_PSX_NEGCON	2		/* NegCon */
+#define GC_PSX_NORMAL	4		/* Digital / Analog or Rumble in Digital mode  */
+#define GC_PSX_ANALOG	5		/* Analog in Analog mode / Rumble in Green mode */
+#define GC_PSX_RUMBLE	7		/* Rumble in Red mode */
+
+#define GC_PSX_CLOCK	0x04		/* Pin 4 */
+#define GC_PSX_COMMAND	0x01		/* Pin 2 */
+#define GC_PSX_POWER	0xf8		/* Pins 5-9 */
+#define GC_PSX_SELECT	0x02		/* Pin 3 */
+
+#define GC_PSX_ID(x)	((x) >> 4)	/* High nibble is device type */
+#define GC_PSX_LEN(x)	(((x) & 0xf) << 1)	/* Low nibble is length in bytes/2 */
+
+static int gc_psx_delay = GC_PSX_DELAY;
+module_param_named(psx_delay, gc_psx_delay, uint, 0);
+MODULE_PARM_DESC(psx_delay, "Delay when accessing Sony PSX controller (usecs)");
+
+static const short gc_psx_abs[] = {
+	ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_HAT0X, ABS_HAT0Y
+};
+static const short gc_psx_btn[] = {
+	BTN_TL, BTN_TR, BTN_TL2, BTN_TR2, BTN_A, BTN_B, BTN_X, BTN_Y,
+	BTN_START, BTN_SELECT, BTN_THUMBL, BTN_THUMBR
+};
+static const short gc_psx_ddr_btn[] = { BTN_0, BTN_1, BTN_2, BTN_3 };
+
+/*
+ * gc_psx_command() writes 8bit command and reads 8bit data from
+ * the psx pad.
+ */
+
+static void gc_psx_command(struct gc *gc, int b, unsigned char *data)
+{
+	struct parport *port = gc->pd->port;
+	int i, j, cmd, read;
+
+	memset(data, 0, GC_MAX_DEVICES);
+
+	for (i = 0; i < GC_PSX_LENGTH; i++, b >>= 1) {
+		cmd = (b & 1) ? GC_PSX_COMMAND : 0;
+		parport_write_data(port, cmd | GC_PSX_POWER);
+		udelay(gc_psx_delay);
+
+		read = parport_read_status(port) ^ 0x80;
+
+		for (j = 0; j < GC_MAX_DEVICES; j++) {
+			struct gc_pad *pad = &gc->pads[j];
+
+			if (pad->type == GC_PSX || pad->type == GC_DDR)
+				data[j] |= (read & gc_status_bit[j]) ? (1 << i) : 0;
+		}
+
+		parport_write_data(gc->pd->port, cmd | GC_PSX_CLOCK | GC_PSX_POWER);
+		udelay(gc_psx_delay);
+	}
+}
+
+/*
+ * gc_psx_read_packet() reads a whole psx packet and returns
+ * device identifier code.
+ */
+
+static void gc_psx_read_packet(struct gc *gc,
+			       unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES],
+			       unsigned char id[GC_MAX_DEVICES])
+{
+	int i, j, max_len = 0;
+	unsigned long flags;
+	unsigned char data2[GC_MAX_DEVICES];
+
+	/* Select pad */
+	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
+	udelay(gc_psx_delay);
+	/* Deselect, begin command */
+	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_POWER);
+	udelay(gc_psx_delay);
+
+	local_irq_save(flags);
+
+	gc_psx_command(gc, 0x01, data2);	/* Access pad */
+	gc_psx_command(gc, 0x42, id);		/* Get device ids */
+	gc_psx_command(gc, 0, data2);		/* Dump status */
+
+	/* Find the longest pad */
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+		struct gc_pad *pad = &gc->pads[i];
+
+		if ((pad->type == GC_PSX || pad->type == GC_DDR) &&
+		    GC_PSX_LEN(id[i]) > max_len &&
+		    GC_PSX_LEN(id[i]) <= GC_PSX_BYTES) {
+			max_len = GC_PSX_LEN(id[i]);
+		}
+	}
+
+	/* Read in all the data */
+	for (i = 0; i < max_len; i++) {
+		gc_psx_command(gc, 0, data2);
+		for (j = 0; j < GC_MAX_DEVICES; j++)
+			data[j][i] = data2[j];
+	}
+
+	local_irq_restore(flags);
+
+	parport_write_data(gc->pd->port, GC_PSX_CLOCK | GC_PSX_SELECT | GC_PSX_POWER);
+
+	/* Set id's to the real value */
+	for (i = 0; i < GC_MAX_DEVICES; i++)
+		id[i] = GC_PSX_ID(id[i]);
+}
+
+static void gc_psx_report_one(struct gc_pad *pad, unsigned char psx_type,
+			      unsigned char *data)
+{
+	struct input_dev *dev = pad->dev;
+	int i;
+
+	switch (psx_type) {
+
+	case GC_PSX_RUMBLE:
+
+		input_report_key(dev, BTN_THUMBL, ~data[0] & 0x04);
+		input_report_key(dev, BTN_THUMBR, ~data[0] & 0x02);
+		fallthrough;
+
+	case GC_PSX_NEGCON:
+	case GC_PSX_ANALOG:
+
+		if (pad->type == GC_DDR) {
+			for (i = 0; i < 4; i++)
+				input_report_key(dev, gc_psx_ddr_btn[i],
+						 ~data[0] & (0x10 << i));
+		} else {
+			for (i = 0; i < 4; i++)
+				input_report_abs(dev, gc_psx_abs[i + 2],
+						 data[i + 2]);
+
+			input_report_abs(dev, ABS_X,
+				!!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
+			input_report_abs(dev, ABS_Y,
+				!!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
+		}
+
+		for (i = 0; i < 8; i++)
+			input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
+
+		input_report_key(dev, BTN_START,  ~data[0] & 0x08);
+		input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
+
+		input_sync(dev);
+
+		break;
+
+	case GC_PSX_NORMAL:
+
+		if (pad->type == GC_DDR) {
+			for (i = 0; i < 4; i++)
+				input_report_key(dev, gc_psx_ddr_btn[i],
+						 ~data[0] & (0x10 << i));
+		} else {
+			input_report_abs(dev, ABS_X,
+				!!(data[0] & 0x80) * 128 + !(data[0] & 0x20) * 127);
+			input_report_abs(dev, ABS_Y,
+				!!(data[0] & 0x10) * 128 + !(data[0] & 0x40) * 127);
+
+			/*
+			 * For some reason if the extra axes are left unset
+			 * they drift.
+			 * for (i = 0; i < 4; i++)
+				input_report_abs(dev, gc_psx_abs[i + 2], 128);
+			 * This needs to be debugged properly,
+			 * maybe fuzz processing needs to be done
+			 * in input_sync()
+			 *				 --vojtech
+			 */
+		}
+
+		for (i = 0; i < 8; i++)
+			input_report_key(dev, gc_psx_btn[i], ~data[1] & (1 << i));
+
+		input_report_key(dev, BTN_START,  ~data[0] & 0x08);
+		input_report_key(dev, BTN_SELECT, ~data[0] & 0x01);
+
+		input_sync(dev);
+
+		break;
+
+	default: /* not a pad, ignore */
+		break;
+	}
+}
+
+static void gc_psx_process_packet(struct gc *gc)
+{
+	unsigned char data[GC_MAX_DEVICES][GC_PSX_BYTES];
+	unsigned char id[GC_MAX_DEVICES];
+	struct gc_pad *pad;
+	int i;
+
+	gc_psx_read_packet(gc, data, id);
+
+	for (i = 0; i < GC_MAX_DEVICES; i++) {
+		pad = &gc->pads[i];
+		if (pad->type == GC_PSX || pad->type == GC_DDR)
+			gc_psx_report_one(pad, id[i], data[i]);
+	}
+}
+
+/*
+ * gc_timer() initiates reads of console pads data.
+ */
+
+static void gc_timer(struct timer_list *t)
+{
+	struct gc *gc = from_timer(gc, t, timer);
+
+/*
+ * N64 pads - must be read first, any read confuses them for 200 us
+ */
+
+	if (gc->pad_count[GC_N64])
+		gc_n64_process_packet(gc);
+
+/*
+ * NES and SNES pads or mouse
+ */
+
+	if (gc->pad_count[GC_NES] ||
+	    gc->pad_count[GC_SNES] ||
+	    gc->pad_count[GC_SNESMOUSE]) {
+		gc_nes_process_packet(gc);
+	}
+
+/*
+ * Multi and Multi2 joysticks
+ */
+
+	if (gc->pad_count[GC_MULTI] || gc->pad_count[GC_MULTI2])
+		gc_multi_process_packet(gc);
+
+/*
+ * PSX controllers
+ */
+
+	if (gc->pad_count[GC_PSX] || gc->pad_count[GC_DDR])
+		gc_psx_process_packet(gc);
+
+	mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
+}
+
+static int gc_open(struct input_dev *dev)
+{
+	struct gc *gc = input_get_drvdata(dev);
+	int err;
+
+	err = mutex_lock_interruptible(&gc->mutex);
+	if (err)
+		return err;
+
+	if (!gc->used++) {
+		parport_claim(gc->pd);
+		parport_write_control(gc->pd->port, 0x04);
+		mod_timer(&gc->timer, jiffies + GC_REFRESH_TIME);
+	}
+
+	mutex_unlock(&gc->mutex);
+	return 0;
+}
+
+static void gc_close(struct input_dev *dev)
+{
+	struct gc *gc = input_get_drvdata(dev);
+
+	mutex_lock(&gc->mutex);
+	if (!--gc->used) {
+		del_timer_sync(&gc->timer);
+		parport_write_control(gc->pd->port, 0x00);
+		parport_release(gc->pd);
+	}
+	mutex_unlock(&gc->mutex);
+}
+
+static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
+{
+	struct gc_pad *pad = &gc->pads[idx];
+	struct input_dev *input_dev;
+	int i;
+	int err;
+
+	if (pad_type < 1 || pad_type >= GC_MAX) {
+		pr_err("Pad type %d unknown\n", pad_type);
+		return -EINVAL;
+	}
+
+	pad->dev = input_dev = input_allocate_device();
+	if (!input_dev) {
+		pr_err("Not enough memory for input device\n");
+		return -ENOMEM;
+	}
+
+	pad->type = pad_type;
+
+	snprintf(pad->phys, sizeof(pad->phys),
+		 "%s/input%d", gc->pd->port->name, idx);
+
+	input_dev->name = gc_names[pad_type];
+	input_dev->phys = pad->phys;
+	input_dev->id.bustype = BUS_PARPORT;
+	input_dev->id.vendor = 0x0001;
+	input_dev->id.product = pad_type;
+	input_dev->id.version = 0x0100;
+
+	input_set_drvdata(input_dev, gc);
+
+	input_dev->open = gc_open;
+	input_dev->close = gc_close;
+
+	if (pad_type != GC_SNESMOUSE) {
+		input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+
+		for (i = 0; i < 2; i++)
+			input_set_abs_params(input_dev, ABS_X + i, -1, 1, 0, 0);
+	} else
+		input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
+
+	gc->pad_count[pad_type]++;
+
+	switch (pad_type) {
+
+	case GC_N64:
+		for (i = 0; i < 10; i++)
+			input_set_capability(input_dev, EV_KEY, gc_n64_btn[i]);
+
+		for (i = 0; i < 2; i++) {
+			input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
+			input_set_abs_params(input_dev, ABS_HAT0X + i, -1, 1, 0, 0);
+		}
+
+		err = gc_n64_init_ff(input_dev, idx);
+		if (err) {
+			pr_warn("Failed to initiate rumble for N64 device %d\n",
+				idx);
+			goto err_free_dev;
+		}
+
+		break;
+
+	case GC_SNESMOUSE:
+		input_set_capability(input_dev, EV_KEY, BTN_LEFT);
+		input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
+		input_set_capability(input_dev, EV_REL, REL_X);
+		input_set_capability(input_dev, EV_REL, REL_Y);
+		break;
+
+	case GC_SNES:
+		for (i = 4; i < 8; i++)
+			input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
+		fallthrough;
+
+	case GC_NES:
+		for (i = 0; i < 4; i++)
+			input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
+		break;
+
+	case GC_MULTI2:
+		input_set_capability(input_dev, EV_KEY, BTN_THUMB);
+		fallthrough;
+
+	case GC_MULTI:
+		input_set_capability(input_dev, EV_KEY, BTN_TRIGGER);
+		break;
+
+	case GC_PSX:
+		for (i = 0; i < 6; i++)
+			input_set_abs_params(input_dev,
+					     gc_psx_abs[i], 4, 252, 0, 2);
+		for (i = 0; i < 12; i++)
+			input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
+		break;
+
+		break;
+
+	case GC_DDR:
+		for (i = 0; i < 4; i++)
+			input_set_capability(input_dev, EV_KEY,
+					     gc_psx_ddr_btn[i]);
+		for (i = 0; i < 12; i++)
+			input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
+
+		break;
+	}
+
+	err = input_register_device(pad->dev);
+	if (err)
+		goto err_free_dev;
+
+	return 0;
+
+err_free_dev:
+	input_free_device(pad->dev);
+	pad->dev = NULL;
+	return err;
+}
+
+static void gc_attach(struct parport *pp)
+{
+	struct gc *gc;
+	struct pardevice *pd;
+	int i, port_idx;
+	int count = 0;
+	int *pads, n_pads;
+	struct pardev_cb gc_parport_cb;
+
+	for (port_idx = 0; port_idx < GC_MAX_PORTS; port_idx++) {
+		if (gc_cfg[port_idx].nargs == 0 || gc_cfg[port_idx].args[0] < 0)
+			continue;
+
+		if (gc_cfg[port_idx].args[0] == pp->number)
+			break;
+	}
+
+	if (port_idx == GC_MAX_PORTS) {
+		pr_debug("Not using parport%d.\n", pp->number);
+		return;
+	}
+	pads = gc_cfg[port_idx].args + 1;
+	n_pads = gc_cfg[port_idx].nargs - 1;
+
+	memset(&gc_parport_cb, 0, sizeof(gc_parport_cb));
+	gc_parport_cb.flags = PARPORT_FLAG_EXCL;
+
+	pd = parport_register_dev_model(pp, "gamecon", &gc_parport_cb,
+					port_idx);
+	if (!pd) {
+		pr_err("parport busy already - lp.o loaded?\n");
+		return;
+	}
+
+	gc = kzalloc(sizeof(struct gc), GFP_KERNEL);
+	if (!gc) {
+		pr_err("Not enough memory\n");
+		goto err_unreg_pardev;
+	}
+
+	mutex_init(&gc->mutex);
+	gc->pd = pd;
+	gc->parportno = pp->number;
+	timer_setup(&gc->timer, gc_timer, 0);
+
+	for (i = 0; i < n_pads && i < GC_MAX_DEVICES; i++) {
+		if (!pads[i])
+			continue;
+
+		if (gc_setup_pad(gc, i, pads[i]))
+			goto err_unreg_devs;
+
+		count++;
+	}
+
+	if (count == 0) {
+		pr_err("No valid devices specified\n");
+		goto err_free_gc;
+	}
+
+	gc_base[port_idx] = gc;
+	return;
+
+ err_unreg_devs:
+	while (--i >= 0)
+		if (gc->pads[i].dev)
+			input_unregister_device(gc->pads[i].dev);
+ err_free_gc:
+	kfree(gc);
+ err_unreg_pardev:
+	parport_unregister_device(pd);
+}
+
+static void gc_detach(struct parport *port)
+{
+	int i;
+	struct gc *gc;
+
+	for (i = 0; i < GC_MAX_PORTS; i++) {
+		if (gc_base[i] && gc_base[i]->parportno == port->number)
+			break;
+	}
+
+	if (i == GC_MAX_PORTS)
+		return;
+
+	gc = gc_base[i];
+	gc_base[i] = NULL;
+
+	for (i = 0; i < GC_MAX_DEVICES; i++)
+		if (gc->pads[i].dev)
+			input_unregister_device(gc->pads[i].dev);
+	parport_unregister_device(gc->pd);
+	kfree(gc);
+}
+
+static struct parport_driver gc_parport_driver = {
+	.name = "gamecon",
+	.match_port = gc_attach,
+	.detach = gc_detach,
+	.devmodel = true,
+};
+
+static int __init gc_init(void)
+{
+	int i;
+	int have_dev = 0;
+
+	for (i = 0; i < GC_MAX_PORTS; i++) {
+		if (gc_cfg[i].nargs == 0 || gc_cfg[i].args[0] < 0)
+			continue;
+
+		if (gc_cfg[i].nargs < 2) {
+			pr_err("at least one device must be specified\n");
+			return -EINVAL;
+		}
+
+		have_dev = 1;
+	}
+
+	if (!have_dev)
+		return -ENODEV;
+
+	return parport_register_driver(&gc_parport_driver);
+}
+
+static void __exit gc_exit(void)
+{
+	parport_unregister_driver(&gc_parport_driver);
+}
+
+module_init(gc_init);
+module_exit(gc_exit);