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/media/rc/ir-rc6-decoder.c | 407 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 407 insertions(+) create mode 100644 drivers/media/rc/ir-rc6-decoder.c (limited to 'drivers/media/rc/ir-rc6-decoder.c') diff --git a/drivers/media/rc/ir-rc6-decoder.c b/drivers/media/rc/ir-rc6-decoder.c new file mode 100644 index 000000000..3b2c8bab3 --- /dev/null +++ b/drivers/media/rc/ir-rc6-decoder.c @@ -0,0 +1,407 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* ir-rc6-decoder.c - A decoder for the RC6 IR protocol + * + * Copyright (C) 2010 by David Härdeman + */ + +#include "rc-core-priv.h" +#include + +/* + * This decoder currently supports: + * RC6-0-16 (standard toggle bit in header) + * RC6-6A-20 (no toggle bit) + * RC6-6A-24 (no toggle bit) + * RC6-6A-32 (MCE version with toggle bit in body) + */ + +#define RC6_UNIT 444 /* microseconds */ +#define RC6_HEADER_NBITS 4 /* not including toggle bit */ +#define RC6_0_NBITS 16 +#define RC6_6A_32_NBITS 32 +#define RC6_6A_NBITS 128 /* Variable 8..128 */ +#define RC6_PREFIX_PULSE (6 * RC6_UNIT) +#define RC6_PREFIX_SPACE (2 * RC6_UNIT) +#define RC6_BIT_START (1 * RC6_UNIT) +#define RC6_BIT_END (1 * RC6_UNIT) +#define RC6_TOGGLE_START (2 * RC6_UNIT) +#define RC6_TOGGLE_END (2 * RC6_UNIT) +#define RC6_SUFFIX_SPACE (6 * RC6_UNIT) +#define RC6_MODE_MASK 0x07 /* for the header bits */ +#define RC6_STARTBIT_MASK 0x08 /* for the header bits */ +#define RC6_6A_MCE_TOGGLE_MASK 0x8000 /* for the body bits */ +#define RC6_6A_LCC_MASK 0xffff0000 /* RC6-6A-32 long customer code mask */ +#define RC6_6A_MCE_CC 0x800f0000 /* MCE customer code */ +#define RC6_6A_ZOTAC_CC 0x80340000 /* Zotac customer code */ +#define RC6_6A_KATHREIN_CC 0x80460000 /* Kathrein RCU-676 customer code */ +#ifndef CHAR_BIT +#define CHAR_BIT 8 /* Normally in */ +#endif + +enum rc6_mode { + RC6_MODE_0, + RC6_MODE_6A, + RC6_MODE_UNKNOWN, +}; + +enum rc6_state { + STATE_INACTIVE, + STATE_PREFIX_SPACE, + STATE_HEADER_BIT_START, + STATE_HEADER_BIT_END, + STATE_TOGGLE_START, + STATE_TOGGLE_END, + STATE_BODY_BIT_START, + STATE_BODY_BIT_END, + STATE_FINISHED, +}; + +static enum rc6_mode rc6_mode(struct rc6_dec *data) +{ + switch (data->header & RC6_MODE_MASK) { + case 0: + return RC6_MODE_0; + case 6: + if (!data->toggle) + return RC6_MODE_6A; + fallthrough; + default: + return RC6_MODE_UNKNOWN; + } +} + +/** + * ir_rc6_decode() - Decode one RC6 pulse or space + * @dev: the struct rc_dev descriptor of the device + * @ev: the struct ir_raw_event descriptor of the pulse/space + * + * This function returns -EINVAL if the pulse violates the state machine + */ +static int ir_rc6_decode(struct rc_dev *dev, struct ir_raw_event ev) +{ + struct rc6_dec *data = &dev->raw->rc6; + u32 scancode; + u8 toggle; + enum rc_proto protocol; + + if (!is_timing_event(ev)) { + if (ev.overflow) + data->state = STATE_INACTIVE; + return 0; + } + + if (!geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2)) + goto out; + +again: + dev_dbg(&dev->dev, "RC6 decode started at state %i (%uus %s)\n", + data->state, ev.duration, TO_STR(ev.pulse)); + + if (!geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2)) + return 0; + + switch (data->state) { + + case STATE_INACTIVE: + if (!ev.pulse) + break; + + /* Note: larger margin on first pulse since each RC6_UNIT + is quite short and some hardware takes some time to + adjust to the signal */ + if (!eq_margin(ev.duration, RC6_PREFIX_PULSE, RC6_UNIT)) + break; + + data->state = STATE_PREFIX_SPACE; + data->count = 0; + return 0; + + case STATE_PREFIX_SPACE: + if (ev.pulse) + break; + + if (!eq_margin(ev.duration, RC6_PREFIX_SPACE, RC6_UNIT / 2)) + break; + + data->state = STATE_HEADER_BIT_START; + data->header = 0; + return 0; + + case STATE_HEADER_BIT_START: + if (!eq_margin(ev.duration, RC6_BIT_START, RC6_UNIT / 2)) + break; + + data->header <<= 1; + if (ev.pulse) + data->header |= 1; + data->count++; + data->state = STATE_HEADER_BIT_END; + return 0; + + case STATE_HEADER_BIT_END: + if (data->count == RC6_HEADER_NBITS) + data->state = STATE_TOGGLE_START; + else + data->state = STATE_HEADER_BIT_START; + + decrease_duration(&ev, RC6_BIT_END); + goto again; + + case STATE_TOGGLE_START: + if (!eq_margin(ev.duration, RC6_TOGGLE_START, RC6_UNIT / 2)) + break; + + data->toggle = ev.pulse; + data->state = STATE_TOGGLE_END; + return 0; + + case STATE_TOGGLE_END: + if (!(data->header & RC6_STARTBIT_MASK)) { + dev_dbg(&dev->dev, "RC6 invalid start bit\n"); + break; + } + + data->state = STATE_BODY_BIT_START; + decrease_duration(&ev, RC6_TOGGLE_END); + data->count = 0; + data->body = 0; + + switch (rc6_mode(data)) { + case RC6_MODE_0: + data->wanted_bits = RC6_0_NBITS; + break; + case RC6_MODE_6A: + data->wanted_bits = RC6_6A_NBITS; + break; + default: + dev_dbg(&dev->dev, "RC6 unknown mode\n"); + goto out; + } + goto again; + + case STATE_BODY_BIT_START: + if (eq_margin(ev.duration, RC6_BIT_START, RC6_UNIT / 2)) { + /* Discard LSB's that won't fit in data->body */ + if (data->count++ < CHAR_BIT * sizeof data->body) { + data->body <<= 1; + if (ev.pulse) + data->body |= 1; + } + data->state = STATE_BODY_BIT_END; + return 0; + } else if (RC6_MODE_6A == rc6_mode(data) && !ev.pulse && + geq_margin(ev.duration, RC6_SUFFIX_SPACE, RC6_UNIT / 2)) { + data->state = STATE_FINISHED; + goto again; + } + break; + + case STATE_BODY_BIT_END: + if (data->count == data->wanted_bits) + data->state = STATE_FINISHED; + else + data->state = STATE_BODY_BIT_START; + + decrease_duration(&ev, RC6_BIT_END); + goto again; + + case STATE_FINISHED: + if (ev.pulse) + break; + + switch (rc6_mode(data)) { + case RC6_MODE_0: + scancode = data->body; + toggle = data->toggle; + protocol = RC_PROTO_RC6_0; + dev_dbg(&dev->dev, "RC6(0) scancode 0x%04x (toggle: %u)\n", + scancode, toggle); + break; + + case RC6_MODE_6A: + if (data->count > CHAR_BIT * sizeof data->body) { + dev_dbg(&dev->dev, "RC6 too many (%u) data bits\n", + data->count); + goto out; + } + + scancode = data->body; + switch (data->count) { + case 20: + protocol = RC_PROTO_RC6_6A_20; + toggle = 0; + break; + case 24: + protocol = RC_PROTO_RC6_6A_24; + toggle = 0; + break; + case 32: + switch (scancode & RC6_6A_LCC_MASK) { + case RC6_6A_MCE_CC: + case RC6_6A_KATHREIN_CC: + case RC6_6A_ZOTAC_CC: + protocol = RC_PROTO_RC6_MCE; + toggle = !!(scancode & RC6_6A_MCE_TOGGLE_MASK); + scancode &= ~RC6_6A_MCE_TOGGLE_MASK; + break; + default: + protocol = RC_PROTO_RC6_6A_32; + toggle = 0; + break; + } + break; + default: + dev_dbg(&dev->dev, "RC6(6A) unsupported length\n"); + goto out; + } + + dev_dbg(&dev->dev, "RC6(6A) proto 0x%04x, scancode 0x%08x (toggle: %u)\n", + protocol, scancode, toggle); + break; + default: + dev_dbg(&dev->dev, "RC6 unknown mode\n"); + goto out; + } + + rc_keydown(dev, protocol, scancode, toggle); + data->state = STATE_INACTIVE; + return 0; + } + +out: + dev_dbg(&dev->dev, "RC6 decode failed at state %i (%uus %s)\n", + data->state, ev.duration, TO_STR(ev.pulse)); + data->state = STATE_INACTIVE; + return -EINVAL; +} + +static const struct ir_raw_timings_manchester ir_rc6_timings[4] = { + { + .leader_pulse = RC6_PREFIX_PULSE, + .leader_space = RC6_PREFIX_SPACE, + .clock = RC6_UNIT, + .invert = 1, + }, + { + .clock = RC6_UNIT * 2, + .invert = 1, + }, + { + .clock = RC6_UNIT, + .invert = 1, + .trailer_space = RC6_SUFFIX_SPACE, + }, +}; + +/** + * ir_rc6_encode() - Encode a scancode as a stream of raw events + * + * @protocol: protocol to encode + * @scancode: scancode to encode + * @events: array of raw ir events to write into + * @max: maximum size of @events + * + * Returns: The number of events written. + * -ENOBUFS if there isn't enough space in the array to fit the + * encoding. In this case all @max events will have been written. + * -EINVAL if the scancode is ambiguous or invalid. + */ +static int ir_rc6_encode(enum rc_proto protocol, u32 scancode, + struct ir_raw_event *events, unsigned int max) +{ + int ret; + struct ir_raw_event *e = events; + + if (protocol == RC_PROTO_RC6_0) { + /* Modulate the header (Start Bit & Mode-0) */ + ret = ir_raw_gen_manchester(&e, max - (e - events), + &ir_rc6_timings[0], + RC6_HEADER_NBITS, (1 << 3)); + if (ret < 0) + return ret; + + /* Modulate Trailer Bit */ + ret = ir_raw_gen_manchester(&e, max - (e - events), + &ir_rc6_timings[1], 1, 0); + if (ret < 0) + return ret; + + /* Modulate rest of the data */ + ret = ir_raw_gen_manchester(&e, max - (e - events), + &ir_rc6_timings[2], RC6_0_NBITS, + scancode); + if (ret < 0) + return ret; + + } else { + int bits; + + switch (protocol) { + case RC_PROTO_RC6_MCE: + case RC_PROTO_RC6_6A_32: + bits = 32; + break; + case RC_PROTO_RC6_6A_24: + bits = 24; + break; + case RC_PROTO_RC6_6A_20: + bits = 20; + break; + default: + return -EINVAL; + } + + /* Modulate the header (Start Bit & Header-version 6 */ + ret = ir_raw_gen_manchester(&e, max - (e - events), + &ir_rc6_timings[0], + RC6_HEADER_NBITS, (1 << 3 | 6)); + if (ret < 0) + return ret; + + /* Modulate Trailer Bit */ + ret = ir_raw_gen_manchester(&e, max - (e - events), + &ir_rc6_timings[1], 1, 0); + if (ret < 0) + return ret; + + /* Modulate rest of the data */ + ret = ir_raw_gen_manchester(&e, max - (e - events), + &ir_rc6_timings[2], + bits, + scancode); + if (ret < 0) + return ret; + } + + return e - events; +} + +static struct ir_raw_handler rc6_handler = { + .protocols = RC_PROTO_BIT_RC6_0 | RC_PROTO_BIT_RC6_6A_20 | + RC_PROTO_BIT_RC6_6A_24 | RC_PROTO_BIT_RC6_6A_32 | + RC_PROTO_BIT_RC6_MCE, + .decode = ir_rc6_decode, + .encode = ir_rc6_encode, + .carrier = 36000, + .min_timeout = RC6_SUFFIX_SPACE, +}; + +static int __init ir_rc6_decode_init(void) +{ + ir_raw_handler_register(&rc6_handler); + + printk(KERN_INFO "IR RC6 protocol handler initialized\n"); + return 0; +} + +static void __exit ir_rc6_decode_exit(void) +{ + ir_raw_handler_unregister(&rc6_handler); +} + +module_init(ir_rc6_decode_init); +module_exit(ir_rc6_decode_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David Härdeman "); +MODULE_DESCRIPTION("RC6 IR protocol decoder"); -- cgit v1.2.3