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-rx51.c | 291 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100644 drivers/media/rc/ir-rx51.c (limited to 'drivers/media/rc/ir-rx51.c') diff --git a/drivers/media/rc/ir-rx51.c b/drivers/media/rc/ir-rx51.c new file mode 100644 index 000000000..85080c3d2 --- /dev/null +++ b/drivers/media/rc/ir-rx51.c @@ -0,0 +1,291 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2008 Nokia Corporation + * + * Based on lirc_serial.c + */ +#include +#include +#include +#include +#include +#include +#include + +#include + +#define WBUF_LEN 256 + +struct ir_rx51 { + struct rc_dev *rcdev; + struct pwm_device *pwm; + struct pwm_state state; + struct hrtimer timer; + struct device *dev; + wait_queue_head_t wqueue; + + unsigned int freq; /* carrier frequency */ + unsigned int duty_cycle; /* carrier duty cycle */ + int wbuf[WBUF_LEN]; + int wbuf_index; + unsigned long device_is_open; +}; + +static inline void ir_rx51_on(struct ir_rx51 *ir_rx51) +{ + ir_rx51->state.enabled = true; + pwm_apply_state(ir_rx51->pwm, &ir_rx51->state); +} + +static inline void ir_rx51_off(struct ir_rx51 *ir_rx51) +{ + ir_rx51->state.enabled = false; + pwm_apply_state(ir_rx51->pwm, &ir_rx51->state); +} + +static int init_timing_params(struct ir_rx51 *ir_rx51) +{ + ir_rx51->state.period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, ir_rx51->freq); + pwm_set_relative_duty_cycle(&ir_rx51->state, ir_rx51->duty_cycle, 100); + + return 0; +} + +static enum hrtimer_restart ir_rx51_timer_cb(struct hrtimer *timer) +{ + struct ir_rx51 *ir_rx51 = container_of(timer, struct ir_rx51, timer); + ktime_t now; + + if (ir_rx51->wbuf_index < 0) { + dev_err_ratelimited(ir_rx51->dev, + "BUG wbuf_index has value of %i\n", + ir_rx51->wbuf_index); + goto end; + } + + /* + * If we happen to hit an odd latency spike, loop through the + * pulses until we catch up. + */ + do { + u64 ns; + + if (ir_rx51->wbuf_index >= WBUF_LEN) + goto end; + if (ir_rx51->wbuf[ir_rx51->wbuf_index] == -1) + goto end; + + if (ir_rx51->wbuf_index % 2) + ir_rx51_off(ir_rx51); + else + ir_rx51_on(ir_rx51); + + ns = US_TO_NS(ir_rx51->wbuf[ir_rx51->wbuf_index]); + hrtimer_add_expires_ns(timer, ns); + + ir_rx51->wbuf_index++; + + now = timer->base->get_time(); + + } while (hrtimer_get_expires_tv64(timer) < now); + + return HRTIMER_RESTART; +end: + /* Stop TX here */ + ir_rx51_off(ir_rx51); + ir_rx51->wbuf_index = -1; + + wake_up_interruptible(&ir_rx51->wqueue); + + return HRTIMER_NORESTART; +} + +static int ir_rx51_tx(struct rc_dev *dev, unsigned int *buffer, + unsigned int count) +{ + struct ir_rx51 *ir_rx51 = dev->priv; + + if (count > WBUF_LEN) + return -EINVAL; + + memcpy(ir_rx51->wbuf, buffer, count * sizeof(unsigned int)); + + /* Wait any pending transfers to finish */ + wait_event_interruptible(ir_rx51->wqueue, ir_rx51->wbuf_index < 0); + + init_timing_params(ir_rx51); + if (count < WBUF_LEN) + ir_rx51->wbuf[count] = -1; /* Insert termination mark */ + + /* + * REVISIT: Adjust latency requirements so the device doesn't go in too + * deep sleep states with pm_qos_add_request(). + */ + + ir_rx51_on(ir_rx51); + ir_rx51->wbuf_index = 1; + hrtimer_start(&ir_rx51->timer, + ns_to_ktime(US_TO_NS(ir_rx51->wbuf[0])), + HRTIMER_MODE_REL); + /* + * Don't return back to the userspace until the transfer has + * finished + */ + wait_event_interruptible(ir_rx51->wqueue, ir_rx51->wbuf_index < 0); + + /* REVISIT: Remove pm_qos constraint, we can sleep again */ + + return count; +} + +static int ir_rx51_open(struct rc_dev *dev) +{ + struct ir_rx51 *ir_rx51 = dev->priv; + + if (test_and_set_bit(1, &ir_rx51->device_is_open)) + return -EBUSY; + + ir_rx51->pwm = pwm_get(ir_rx51->dev, NULL); + if (IS_ERR(ir_rx51->pwm)) { + int res = PTR_ERR(ir_rx51->pwm); + + dev_err(ir_rx51->dev, "pwm_get failed: %d\n", res); + return res; + } + + return 0; +} + +static void ir_rx51_release(struct rc_dev *dev) +{ + struct ir_rx51 *ir_rx51 = dev->priv; + + hrtimer_cancel(&ir_rx51->timer); + ir_rx51_off(ir_rx51); + pwm_put(ir_rx51->pwm); + + clear_bit(1, &ir_rx51->device_is_open); +} + +static struct ir_rx51 ir_rx51 = { + .duty_cycle = 50, + .wbuf_index = -1, +}; + +static int ir_rx51_set_duty_cycle(struct rc_dev *dev, u32 duty) +{ + struct ir_rx51 *ir_rx51 = dev->priv; + + ir_rx51->duty_cycle = duty; + + return 0; +} + +static int ir_rx51_set_tx_carrier(struct rc_dev *dev, u32 carrier) +{ + struct ir_rx51 *ir_rx51 = dev->priv; + + if (carrier > 500000 || carrier < 20000) + return -EINVAL; + + ir_rx51->freq = carrier; + + return 0; +} + +#ifdef CONFIG_PM + +static int ir_rx51_suspend(struct platform_device *dev, pm_message_t state) +{ + /* + * In case the device is still open, do not suspend. Normally + * this should not be a problem as lircd only keeps the device + * open only for short periods of time. We also don't want to + * get involved with race conditions that might happen if we + * were in a middle of a transmit. Thus, we defer any suspend + * actions until transmit has completed. + */ + if (test_and_set_bit(1, &ir_rx51.device_is_open)) + return -EAGAIN; + + clear_bit(1, &ir_rx51.device_is_open); + + return 0; +} + +static int ir_rx51_resume(struct platform_device *dev) +{ + return 0; +} + +#else + +#define ir_rx51_suspend NULL +#define ir_rx51_resume NULL + +#endif /* CONFIG_PM */ + +static int ir_rx51_probe(struct platform_device *dev) +{ + struct pwm_device *pwm; + struct rc_dev *rcdev; + + pwm = pwm_get(&dev->dev, NULL); + if (IS_ERR(pwm)) + return dev_err_probe(&dev->dev, PTR_ERR(pwm), "pwm_get failed\n"); + + /* Use default, in case userspace does not set the carrier */ + ir_rx51.freq = DIV_ROUND_CLOSEST_ULL(pwm_get_period(pwm), NSEC_PER_SEC); + pwm_init_state(pwm, &ir_rx51.state); + pwm_put(pwm); + + hrtimer_init(&ir_rx51.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + ir_rx51.timer.function = ir_rx51_timer_cb; + + ir_rx51.dev = &dev->dev; + + rcdev = devm_rc_allocate_device(&dev->dev, RC_DRIVER_IR_RAW_TX); + if (!rcdev) + return -ENOMEM; + + rcdev->priv = &ir_rx51; + rcdev->open = ir_rx51_open; + rcdev->close = ir_rx51_release; + rcdev->tx_ir = ir_rx51_tx; + rcdev->s_tx_duty_cycle = ir_rx51_set_duty_cycle; + rcdev->s_tx_carrier = ir_rx51_set_tx_carrier; + rcdev->driver_name = KBUILD_MODNAME; + + ir_rx51.rcdev = rcdev; + + return devm_rc_register_device(&dev->dev, ir_rx51.rcdev); +} + +static int ir_rx51_remove(struct platform_device *dev) +{ + return 0; +} + +static const struct of_device_id ir_rx51_match[] = { + { + .compatible = "nokia,n900-ir", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, ir_rx51_match); + +static struct platform_driver ir_rx51_platform_driver = { + .probe = ir_rx51_probe, + .remove = ir_rx51_remove, + .suspend = ir_rx51_suspend, + .resume = ir_rx51_resume, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = of_match_ptr(ir_rx51_match), + }, +}; +module_platform_driver(ir_rx51_platform_driver); + +MODULE_DESCRIPTION("IR TX driver for Nokia RX51"); +MODULE_AUTHOR("Nokia Corporation"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3