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/rtc/rtc-digicolor.c | 224 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 drivers/rtc/rtc-digicolor.c (limited to 'drivers/rtc/rtc-digicolor.c') diff --git a/drivers/rtc/rtc-digicolor.c b/drivers/rtc/rtc-digicolor.c new file mode 100644 index 000000000..218a6de19 --- /dev/null +++ b/drivers/rtc/rtc-digicolor.c @@ -0,0 +1,224 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Real Time Clock driver for Conexant Digicolor + * + * Copyright (C) 2015 Paradox Innovation Ltd. + * + * Author: Baruch Siach + */ + +#include +#include +#include +#include +#include +#include +#include + +#define DC_RTC_CONTROL 0x0 +#define DC_RTC_TIME 0x8 +#define DC_RTC_REFERENCE 0xc +#define DC_RTC_ALARM 0x10 +#define DC_RTC_INTFLAG_CLEAR 0x14 +#define DC_RTC_INTENABLE 0x16 + +#define DC_RTC_CMD_MASK 0xf +#define DC_RTC_GO_BUSY BIT(7) + +#define CMD_NOP 0 +#define CMD_RESET 1 +#define CMD_WRITE 3 +#define CMD_READ 4 + +#define CMD_DELAY_US (10*1000) +#define CMD_TIMEOUT_US (500*CMD_DELAY_US) + +struct dc_rtc { + struct rtc_device *rtc_dev; + void __iomem *regs; +}; + +static int dc_rtc_cmds(struct dc_rtc *rtc, const u8 *cmds, int len) +{ + u8 val; + int i, ret; + + for (i = 0; i < len; i++) { + writeb_relaxed((cmds[i] & DC_RTC_CMD_MASK) | DC_RTC_GO_BUSY, + rtc->regs + DC_RTC_CONTROL); + ret = readb_relaxed_poll_timeout( + rtc->regs + DC_RTC_CONTROL, val, + !(val & DC_RTC_GO_BUSY), CMD_DELAY_US, CMD_TIMEOUT_US); + if (ret < 0) + return ret; + } + + return 0; +} + +static int dc_rtc_read(struct dc_rtc *rtc, unsigned long *val) +{ + static const u8 read_cmds[] = {CMD_READ, CMD_NOP}; + u32 reference, time1, time2; + int ret; + + ret = dc_rtc_cmds(rtc, read_cmds, ARRAY_SIZE(read_cmds)); + if (ret < 0) + return ret; + + reference = readl_relaxed(rtc->regs + DC_RTC_REFERENCE); + time1 = readl_relaxed(rtc->regs + DC_RTC_TIME); + /* Read twice to ensure consistency */ + while (1) { + time2 = readl_relaxed(rtc->regs + DC_RTC_TIME); + if (time1 == time2) + break; + time1 = time2; + } + + *val = reference + time1; + return 0; +} + +static int dc_rtc_write(struct dc_rtc *rtc, u32 val) +{ + static const u8 write_cmds[] = {CMD_WRITE, CMD_NOP, CMD_RESET, CMD_NOP}; + + writel_relaxed(val, rtc->regs + DC_RTC_REFERENCE); + return dc_rtc_cmds(rtc, write_cmds, ARRAY_SIZE(write_cmds)); +} + +static int dc_rtc_read_time(struct device *dev, struct rtc_time *tm) +{ + struct dc_rtc *rtc = dev_get_drvdata(dev); + unsigned long now; + int ret; + + ret = dc_rtc_read(rtc, &now); + if (ret < 0) + return ret; + rtc_time64_to_tm(now, tm); + + return 0; +} + +static int dc_rtc_set_time(struct device *dev, struct rtc_time *tm) +{ + struct dc_rtc *rtc = dev_get_drvdata(dev); + + return dc_rtc_write(rtc, rtc_tm_to_time64(tm)); +} + +static int dc_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct dc_rtc *rtc = dev_get_drvdata(dev); + u32 alarm_reg, reference; + unsigned long now; + int ret; + + alarm_reg = readl_relaxed(rtc->regs + DC_RTC_ALARM); + reference = readl_relaxed(rtc->regs + DC_RTC_REFERENCE); + rtc_time64_to_tm(reference + alarm_reg, &alarm->time); + + ret = dc_rtc_read(rtc, &now); + if (ret < 0) + return ret; + + alarm->pending = alarm_reg + reference > now; + alarm->enabled = readl_relaxed(rtc->regs + DC_RTC_INTENABLE); + + return 0; +} + +static int dc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) +{ + struct dc_rtc *rtc = dev_get_drvdata(dev); + time64_t alarm_time; + u32 reference; + + alarm_time = rtc_tm_to_time64(&alarm->time); + + reference = readl_relaxed(rtc->regs + DC_RTC_REFERENCE); + writel_relaxed(alarm_time - reference, rtc->regs + DC_RTC_ALARM); + + writeb_relaxed(!!alarm->enabled, rtc->regs + DC_RTC_INTENABLE); + + return 0; +} + +static int dc_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) +{ + struct dc_rtc *rtc = dev_get_drvdata(dev); + + writeb_relaxed(!!enabled, rtc->regs + DC_RTC_INTENABLE); + + return 0; +} + +static const struct rtc_class_ops dc_rtc_ops = { + .read_time = dc_rtc_read_time, + .set_time = dc_rtc_set_time, + .read_alarm = dc_rtc_read_alarm, + .set_alarm = dc_rtc_set_alarm, + .alarm_irq_enable = dc_rtc_alarm_irq_enable, +}; + +static irqreturn_t dc_rtc_irq(int irq, void *dev_id) +{ + struct dc_rtc *rtc = dev_id; + + writeb_relaxed(1, rtc->regs + DC_RTC_INTFLAG_CLEAR); + rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF); + + return IRQ_HANDLED; +} + +static int __init dc_rtc_probe(struct platform_device *pdev) +{ + struct dc_rtc *rtc; + int irq, ret; + + rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL); + if (!rtc) + return -ENOMEM; + + rtc->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(rtc->regs)) + return PTR_ERR(rtc->regs); + + rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev); + if (IS_ERR(rtc->rtc_dev)) + return PTR_ERR(rtc->rtc_dev); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + ret = devm_request_irq(&pdev->dev, irq, dc_rtc_irq, 0, pdev->name, rtc); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, rtc); + + rtc->rtc_dev->ops = &dc_rtc_ops; + rtc->rtc_dev->range_max = U32_MAX; + + return devm_rtc_register_device(rtc->rtc_dev); +} + +static const __maybe_unused struct of_device_id dc_dt_ids[] = { + { .compatible = "cnxt,cx92755-rtc" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, dc_dt_ids); + +static struct platform_driver dc_rtc_driver = { + .driver = { + .name = "digicolor_rtc", + .of_match_table = of_match_ptr(dc_dt_ids), + }, +}; +module_platform_driver_probe(dc_rtc_driver, dc_rtc_probe); + +MODULE_AUTHOR("Baruch Siach "); +MODULE_DESCRIPTION("Conexant Digicolor Realtime Clock Driver (RTC)"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3