From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/input/joystick/twidjoy.c | 244 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 244 insertions(+) create mode 100644 drivers/input/joystick/twidjoy.c (limited to 'drivers/input/joystick/twidjoy.c') diff --git a/drivers/input/joystick/twidjoy.c b/drivers/input/joystick/twidjoy.c new file mode 100644 index 000000000..9b6792ac2 --- /dev/null +++ b/drivers/input/joystick/twidjoy.c @@ -0,0 +1,244 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2001 Arndt Schoenewald + * Copyright (c) 2000-2001 Vojtech Pavlik + * Copyright (c) 2000 Mark Fletcher + * + * Sponsored by Quelltext AG (http://www.quelltext-ag.de), Dortmund, Germany + */ + +/* + * Driver to use Handykey's Twiddler (the first edition, i.e. the one with + * the RS232 interface) as a joystick under Linux + * + * The Twiddler is a one-handed chording keyboard featuring twelve buttons on + * the front, six buttons on the top, and a built-in tilt sensor. The buttons + * on the front, which are grouped as four rows of three buttons, are pressed + * by the four fingers (this implies only one button per row can be held down + * at the same time) and the buttons on the top are for the thumb. The tilt + * sensor delivers X and Y axis data depending on how the Twiddler is held. + * Additional information can be found at http://www.handykey.com. + * + * This driver does not use the Twiddler for its intended purpose, i.e. as + * a chording keyboard, but as a joystick: pressing and releasing a button + * immediately sends a corresponding button event, and tilting it generates + * corresponding ABS_X and ABS_Y events. This turns the Twiddler into a game + * controller with amazing 18 buttons :-) + * + * Note: The Twiddler2 (the successor of the Twiddler that connects directly + * to the PS/2 keyboard and mouse ports) is NOT supported by this driver! + * + * For questions or feedback regarding this driver module please contact: + * Arndt Schoenewald + */ + +#include +#include +#include +#include +#include + +#define DRIVER_DESC "Handykey Twiddler keyboard as a joystick driver" + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +/* + * Constants. + */ + +#define TWIDJOY_MAX_LENGTH 5 + +static struct twidjoy_button_spec { + int bitshift; + int bitmask; + int buttons[3]; +} +twidjoy_buttons[] = { + { 0, 3, { BTN_A, BTN_B, BTN_C } }, + { 2, 3, { BTN_X, BTN_Y, BTN_Z } }, + { 4, 3, { BTN_TL, BTN_TR, BTN_TR2 } }, + { 6, 3, { BTN_SELECT, BTN_START, BTN_MODE } }, + { 8, 1, { BTN_BASE5 } }, + { 9, 1, { BTN_BASE } }, + { 10, 1, { BTN_BASE3 } }, + { 11, 1, { BTN_BASE4 } }, + { 12, 1, { BTN_BASE2 } }, + { 13, 1, { BTN_BASE6 } }, + { 0, 0, { 0 } } +}; + +/* + * Per-Twiddler data. + */ + +struct twidjoy { + struct input_dev *dev; + int idx; + unsigned char data[TWIDJOY_MAX_LENGTH]; + char phys[32]; +}; + +/* + * twidjoy_process_packet() decodes packets the driver receives from the + * Twiddler. It updates the data accordingly. + */ + +static void twidjoy_process_packet(struct twidjoy *twidjoy) +{ + struct input_dev *dev = twidjoy->dev; + unsigned char *data = twidjoy->data; + struct twidjoy_button_spec *bp; + int button_bits, abs_x, abs_y; + + button_bits = ((data[1] & 0x7f) << 7) | (data[0] & 0x7f); + + for (bp = twidjoy_buttons; bp->bitmask; bp++) { + int value = (button_bits & (bp->bitmask << bp->bitshift)) >> bp->bitshift; + int i; + + for (i = 0; i < bp->bitmask; i++) + input_report_key(dev, bp->buttons[i], i+1 == value); + } + + abs_x = ((data[4] & 0x07) << 5) | ((data[3] & 0x7C) >> 2); + if (data[4] & 0x08) abs_x -= 256; + + abs_y = ((data[3] & 0x01) << 7) | ((data[2] & 0x7F) >> 0); + if (data[3] & 0x02) abs_y -= 256; + + input_report_abs(dev, ABS_X, -abs_x); + input_report_abs(dev, ABS_Y, +abs_y); + + input_sync(dev); +} + +/* + * twidjoy_interrupt() is called by the low level driver when characters + * are ready for us. We then buffer them for further processing, or call the + * packet processing routine. + */ + +static irqreturn_t twidjoy_interrupt(struct serio *serio, unsigned char data, unsigned int flags) +{ + struct twidjoy *twidjoy = serio_get_drvdata(serio); + + /* All Twiddler packets are 5 bytes. The fact that the first byte + * has a MSB of 0 and all other bytes have a MSB of 1 can be used + * to check and regain sync. */ + + if ((data & 0x80) == 0) + twidjoy->idx = 0; /* this byte starts a new packet */ + else if (twidjoy->idx == 0) + return IRQ_HANDLED; /* wrong MSB -- ignore this byte */ + + if (twidjoy->idx < TWIDJOY_MAX_LENGTH) + twidjoy->data[twidjoy->idx++] = data; + + if (twidjoy->idx == TWIDJOY_MAX_LENGTH) { + twidjoy_process_packet(twidjoy); + twidjoy->idx = 0; + } + + return IRQ_HANDLED; +} + +/* + * twidjoy_disconnect() is the opposite of twidjoy_connect() + */ + +static void twidjoy_disconnect(struct serio *serio) +{ + struct twidjoy *twidjoy = serio_get_drvdata(serio); + + serio_close(serio); + serio_set_drvdata(serio, NULL); + input_unregister_device(twidjoy->dev); + kfree(twidjoy); +} + +/* + * twidjoy_connect() is the routine that is called when someone adds a + * new serio device. It looks for the Twiddler, and if found, registers + * it as an input device. + */ + +static int twidjoy_connect(struct serio *serio, struct serio_driver *drv) +{ + struct twidjoy_button_spec *bp; + struct twidjoy *twidjoy; + struct input_dev *input_dev; + int err = -ENOMEM; + int i; + + twidjoy = kzalloc(sizeof(struct twidjoy), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!twidjoy || !input_dev) + goto fail1; + + twidjoy->dev = input_dev; + snprintf(twidjoy->phys, sizeof(twidjoy->phys), "%s/input0", serio->phys); + + input_dev->name = "Handykey Twiddler"; + input_dev->phys = twidjoy->phys; + input_dev->id.bustype = BUS_RS232; + input_dev->id.vendor = SERIO_TWIDJOY; + input_dev->id.product = 0x0001; + input_dev->id.version = 0x0100; + input_dev->dev.parent = &serio->dev; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input_set_abs_params(input_dev, ABS_X, -50, 50, 4, 4); + input_set_abs_params(input_dev, ABS_Y, -50, 50, 4, 4); + + for (bp = twidjoy_buttons; bp->bitmask; bp++) + for (i = 0; i < bp->bitmask; i++) + set_bit(bp->buttons[i], input_dev->keybit); + + serio_set_drvdata(serio, twidjoy); + + err = serio_open(serio, drv); + if (err) + goto fail2; + + err = input_register_device(twidjoy->dev); + if (err) + goto fail3; + + return 0; + + fail3: serio_close(serio); + fail2: serio_set_drvdata(serio, NULL); + fail1: input_free_device(input_dev); + kfree(twidjoy); + return err; +} + +/* + * The serio driver structure. + */ + +static const struct serio_device_id twidjoy_serio_ids[] = { + { + .type = SERIO_RS232, + .proto = SERIO_TWIDJOY, + .id = SERIO_ANY, + .extra = SERIO_ANY, + }, + { 0 } +}; + +MODULE_DEVICE_TABLE(serio, twidjoy_serio_ids); + +static struct serio_driver twidjoy_drv = { + .driver = { + .name = "twidjoy", + }, + .description = DRIVER_DESC, + .id_table = twidjoy_serio_ids, + .interrupt = twidjoy_interrupt, + .connect = twidjoy_connect, + .disconnect = twidjoy_disconnect, +}; + +module_serio_driver(twidjoy_drv); -- cgit v1.2.3