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/tty/serial/8250/8250_lpc18xx.c | 214 +++++++++++++++++++++++++++++++++ 1 file changed, 214 insertions(+) create mode 100644 drivers/tty/serial/8250/8250_lpc18xx.c (limited to 'drivers/tty/serial/8250/8250_lpc18xx.c') diff --git a/drivers/tty/serial/8250/8250_lpc18xx.c b/drivers/tty/serial/8250/8250_lpc18xx.c new file mode 100644 index 000000000..6dc85aaba --- /dev/null +++ b/drivers/tty/serial/8250/8250_lpc18xx.c @@ -0,0 +1,214 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Serial port driver for NXP LPC18xx/43xx UART + * + * Copyright (C) 2015 Joachim Eastwood + * + * Based on 8250_mtk.c: + * Copyright (c) 2014 MundoReader S.L. + * Matthias Brugger + */ + +#include +#include +#include +#include +#include + +#include "8250.h" + +/* Additional LPC18xx/43xx 8250 registers and bits */ +#define LPC18XX_UART_RS485CTRL (0x04c / sizeof(u32)) +#define LPC18XX_UART_RS485CTRL_NMMEN BIT(0) +#define LPC18XX_UART_RS485CTRL_DCTRL BIT(4) +#define LPC18XX_UART_RS485CTRL_OINV BIT(5) +#define LPC18XX_UART_RS485DLY (0x054 / sizeof(u32)) +#define LPC18XX_UART_RS485DLY_MAX 255 + +struct lpc18xx_uart_data { + struct uart_8250_dma dma; + struct clk *clk_uart; + struct clk *clk_reg; + int line; +}; + +static int lpc18xx_rs485_config(struct uart_port *port, struct ktermios *termios, + struct serial_rs485 *rs485) +{ + struct uart_8250_port *up = up_to_u8250p(port); + u32 rs485_ctrl_reg = 0; + u32 rs485_dly_reg = 0; + unsigned baud_clk; + + if (rs485->flags & SER_RS485_ENABLED) { + rs485_ctrl_reg |= LPC18XX_UART_RS485CTRL_NMMEN | + LPC18XX_UART_RS485CTRL_DCTRL; + + if (rs485->flags & SER_RS485_RTS_ON_SEND) + rs485_ctrl_reg |= LPC18XX_UART_RS485CTRL_OINV; + } + + if (rs485->delay_rts_after_send) { + baud_clk = port->uartclk / up->dl_read(up); + rs485_dly_reg = DIV_ROUND_UP(rs485->delay_rts_after_send + * baud_clk, MSEC_PER_SEC); + + if (rs485_dly_reg > LPC18XX_UART_RS485DLY_MAX) + rs485_dly_reg = LPC18XX_UART_RS485DLY_MAX; + + /* Calculate the resulting delay in ms */ + rs485->delay_rts_after_send = (rs485_dly_reg * MSEC_PER_SEC) + / baud_clk; + } + + serial_out(up, LPC18XX_UART_RS485CTRL, rs485_ctrl_reg); + serial_out(up, LPC18XX_UART_RS485DLY, rs485_dly_reg); + + return 0; +} + +static void lpc18xx_uart_serial_out(struct uart_port *p, int offset, int value) +{ + /* + * For DMA mode one must ensure that the UART_FCR_DMA_SELECT + * bit is set when FIFO is enabled. Even if DMA is not used + * setting this bit doesn't seem to affect anything. + */ + if (offset == UART_FCR && (value & UART_FCR_ENABLE_FIFO)) + value |= UART_FCR_DMA_SELECT; + + offset = offset << p->regshift; + writel(value, p->membase + offset); +} + +static const struct serial_rs485 lpc18xx_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, + .delay_rts_after_send = 1, + /* Delay RTS before send is not supported */ +}; + +static int lpc18xx_serial_probe(struct platform_device *pdev) +{ + struct lpc18xx_uart_data *data; + struct uart_8250_port uart; + struct resource *res; + int irq, ret; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "memory resource not found"); + return -EINVAL; + } + + memset(&uart, 0, sizeof(uart)); + + uart.port.membase = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (!uart.port.membase) + return -ENOMEM; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->clk_uart = devm_clk_get(&pdev->dev, "uartclk"); + if (IS_ERR(data->clk_uart)) { + dev_err(&pdev->dev, "uart clock not found\n"); + return PTR_ERR(data->clk_uart); + } + + data->clk_reg = devm_clk_get(&pdev->dev, "reg"); + if (IS_ERR(data->clk_reg)) { + dev_err(&pdev->dev, "reg clock not found\n"); + return PTR_ERR(data->clk_reg); + } + + ret = clk_prepare_enable(data->clk_reg); + if (ret) { + dev_err(&pdev->dev, "unable to enable reg clock\n"); + return ret; + } + + ret = clk_prepare_enable(data->clk_uart); + if (ret) { + dev_err(&pdev->dev, "unable to enable uart clock\n"); + goto dis_clk_reg; + } + + ret = of_alias_get_id(pdev->dev.of_node, "serial"); + if (ret >= 0) + uart.port.line = ret; + + data->dma.rx_param = data; + data->dma.tx_param = data; + + spin_lock_init(&uart.port.lock); + uart.port.dev = &pdev->dev; + uart.port.irq = irq; + uart.port.iotype = UPIO_MEM32; + uart.port.mapbase = res->start; + uart.port.regshift = 2; + uart.port.type = PORT_16550A; + uart.port.flags = UPF_FIXED_PORT | UPF_FIXED_TYPE | UPF_SKIP_TEST; + uart.port.uartclk = clk_get_rate(data->clk_uart); + uart.port.private_data = data; + uart.port.rs485_config = lpc18xx_rs485_config; + uart.port.rs485_supported = lpc18xx_rs485_supported; + uart.port.serial_out = lpc18xx_uart_serial_out; + + uart.dma = &data->dma; + uart.dma->rxconf.src_maxburst = 1; + uart.dma->txconf.dst_maxburst = 1; + + ret = serial8250_register_8250_port(&uart); + if (ret < 0) { + dev_err(&pdev->dev, "unable to register 8250 port\n"); + goto dis_uart_clk; + } + + data->line = ret; + platform_set_drvdata(pdev, data); + + return 0; + +dis_uart_clk: + clk_disable_unprepare(data->clk_uart); +dis_clk_reg: + clk_disable_unprepare(data->clk_reg); + return ret; +} + +static int lpc18xx_serial_remove(struct platform_device *pdev) +{ + struct lpc18xx_uart_data *data = platform_get_drvdata(pdev); + + serial8250_unregister_port(data->line); + clk_disable_unprepare(data->clk_uart); + clk_disable_unprepare(data->clk_reg); + + return 0; +} + +static const struct of_device_id lpc18xx_serial_match[] = { + { .compatible = "nxp,lpc1850-uart" }, + { }, +}; +MODULE_DEVICE_TABLE(of, lpc18xx_serial_match); + +static struct platform_driver lpc18xx_serial_driver = { + .probe = lpc18xx_serial_probe, + .remove = lpc18xx_serial_remove, + .driver = { + .name = "lpc18xx-uart", + .of_match_table = lpc18xx_serial_match, + }, +}; +module_platform_driver(lpc18xx_serial_driver); + +MODULE_AUTHOR("Joachim Eastwood "); +MODULE_DESCRIPTION("Serial port driver NXP LPC18xx/43xx devices"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3