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/keyboard/spear-keyboard.c | 391 ++++++++++++++++++++++++++++++++ 1 file changed, 391 insertions(+) create mode 100644 drivers/input/keyboard/spear-keyboard.c (limited to 'drivers/input/keyboard/spear-keyboard.c') diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c new file mode 100644 index 000000000..4bb7c5331 --- /dev/null +++ b/drivers/input/keyboard/spear-keyboard.c @@ -0,0 +1,391 @@ +/* + * SPEAr Keyboard Driver + * Based on omap-keypad driver + * + * Copyright (C) 2010 ST Microelectronics + * Rajeev Kumar + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Keyboard Registers */ +#define MODE_CTL_REG 0x00 +#define STATUS_REG 0x0C +#define DATA_REG 0x10 +#define INTR_MASK 0x54 + +/* Register Values */ +#define NUM_ROWS 16 +#define NUM_COLS 16 +#define MODE_CTL_PCLK_FREQ_SHIFT 9 +#define MODE_CTL_PCLK_FREQ_MSK 0x7F + +#define MODE_CTL_KEYBOARD (0x2 << 0) +#define MODE_CTL_SCAN_RATE_10 (0x0 << 2) +#define MODE_CTL_SCAN_RATE_20 (0x1 << 2) +#define MODE_CTL_SCAN_RATE_40 (0x2 << 2) +#define MODE_CTL_SCAN_RATE_80 (0x3 << 2) +#define MODE_CTL_KEYNUM_SHIFT 6 +#define MODE_CTL_START_SCAN (0x1 << 8) + +#define STATUS_DATA_AVAIL (0x1 << 1) + +#define DATA_ROW_MASK 0xF0 +#define DATA_COLUMN_MASK 0x0F + +#define ROW_SHIFT 4 + +struct spear_kbd { + struct input_dev *input; + void __iomem *io_base; + struct clk *clk; + unsigned int irq; + unsigned int mode; + unsigned int suspended_rate; + unsigned short last_key; + unsigned short keycodes[NUM_ROWS * NUM_COLS]; + bool rep; + bool irq_wake_enabled; + u32 mode_ctl_reg; +}; + +static irqreturn_t spear_kbd_interrupt(int irq, void *dev_id) +{ + struct spear_kbd *kbd = dev_id; + struct input_dev *input = kbd->input; + unsigned int key; + u32 sts, val; + + sts = readl_relaxed(kbd->io_base + STATUS_REG); + if (!(sts & STATUS_DATA_AVAIL)) + return IRQ_NONE; + + if (kbd->last_key != KEY_RESERVED) { + input_report_key(input, kbd->last_key, 0); + kbd->last_key = KEY_RESERVED; + } + + /* following reads active (row, col) pair */ + val = readl_relaxed(kbd->io_base + DATA_REG) & + (DATA_ROW_MASK | DATA_COLUMN_MASK); + key = kbd->keycodes[val]; + + input_event(input, EV_MSC, MSC_SCAN, val); + input_report_key(input, key, 1); + input_sync(input); + + kbd->last_key = key; + + /* clear interrupt */ + writel_relaxed(0, kbd->io_base + STATUS_REG); + + return IRQ_HANDLED; +} + +static int spear_kbd_open(struct input_dev *dev) +{ + struct spear_kbd *kbd = input_get_drvdata(dev); + int error; + u32 val; + + kbd->last_key = KEY_RESERVED; + + error = clk_enable(kbd->clk); + if (error) + return error; + + /* keyboard rate to be programmed is input clock (in MHz) - 1 */ + val = clk_get_rate(kbd->clk) / 1000000 - 1; + val = (val & MODE_CTL_PCLK_FREQ_MSK) << MODE_CTL_PCLK_FREQ_SHIFT; + + /* program keyboard */ + val = MODE_CTL_SCAN_RATE_80 | MODE_CTL_KEYBOARD | val | + (kbd->mode << MODE_CTL_KEYNUM_SHIFT); + writel_relaxed(val, kbd->io_base + MODE_CTL_REG); + writel_relaxed(1, kbd->io_base + STATUS_REG); + + /* start key scan */ + val = readl_relaxed(kbd->io_base + MODE_CTL_REG); + val |= MODE_CTL_START_SCAN; + writel_relaxed(val, kbd->io_base + MODE_CTL_REG); + + return 0; +} + +static void spear_kbd_close(struct input_dev *dev) +{ + struct spear_kbd *kbd = input_get_drvdata(dev); + u32 val; + + /* stop key scan */ + val = readl_relaxed(kbd->io_base + MODE_CTL_REG); + val &= ~MODE_CTL_START_SCAN; + writel_relaxed(val, kbd->io_base + MODE_CTL_REG); + + clk_disable(kbd->clk); + + kbd->last_key = KEY_RESERVED; +} + +#ifdef CONFIG_OF +static int spear_kbd_parse_dt(struct platform_device *pdev, + struct spear_kbd *kbd) +{ + struct device_node *np = pdev->dev.of_node; + int error; + u32 val, suspended_rate; + + if (!np) { + dev_err(&pdev->dev, "Missing DT data\n"); + return -EINVAL; + } + + if (of_property_read_bool(np, "autorepeat")) + kbd->rep = true; + + if (of_property_read_u32(np, "suspended_rate", &suspended_rate)) + kbd->suspended_rate = suspended_rate; + + error = of_property_read_u32(np, "st,mode", &val); + if (error) { + dev_err(&pdev->dev, "DT: Invalid or missing mode\n"); + return error; + } + + kbd->mode = val; + return 0; +} +#else +static inline int spear_kbd_parse_dt(struct platform_device *pdev, + struct spear_kbd *kbd) +{ + return -ENOSYS; +} +#endif + +static int spear_kbd_probe(struct platform_device *pdev) +{ + struct kbd_platform_data *pdata = dev_get_platdata(&pdev->dev); + const struct matrix_keymap_data *keymap = pdata ? pdata->keymap : NULL; + struct spear_kbd *kbd; + struct input_dev *input_dev; + struct resource *res; + int irq; + int error; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + kbd = devm_kzalloc(&pdev->dev, sizeof(*kbd), GFP_KERNEL); + if (!kbd) { + dev_err(&pdev->dev, "not enough memory for driver data\n"); + return -ENOMEM; + } + + input_dev = devm_input_allocate_device(&pdev->dev); + if (!input_dev) { + dev_err(&pdev->dev, "unable to allocate input device\n"); + return -ENOMEM; + } + + kbd->input = input_dev; + kbd->irq = irq; + + if (!pdata) { + error = spear_kbd_parse_dt(pdev, kbd); + if (error) + return error; + } else { + kbd->mode = pdata->mode; + kbd->rep = pdata->rep; + kbd->suspended_rate = pdata->suspended_rate; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + kbd->io_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(kbd->io_base)) + return PTR_ERR(kbd->io_base); + + kbd->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(kbd->clk)) + return PTR_ERR(kbd->clk); + + input_dev->name = "Spear Keyboard"; + input_dev->phys = "keyboard/input0"; + input_dev->id.bustype = BUS_HOST; + input_dev->id.vendor = 0x0001; + input_dev->id.product = 0x0001; + input_dev->id.version = 0x0100; + input_dev->open = spear_kbd_open; + input_dev->close = spear_kbd_close; + + error = matrix_keypad_build_keymap(keymap, NULL, NUM_ROWS, NUM_COLS, + kbd->keycodes, input_dev); + if (error) { + dev_err(&pdev->dev, "Failed to build keymap\n"); + return error; + } + + if (kbd->rep) + __set_bit(EV_REP, input_dev->evbit); + input_set_capability(input_dev, EV_MSC, MSC_SCAN); + + input_set_drvdata(input_dev, kbd); + + error = devm_request_irq(&pdev->dev, irq, spear_kbd_interrupt, 0, + "keyboard", kbd); + if (error) { + dev_err(&pdev->dev, "request_irq failed\n"); + return error; + } + + error = clk_prepare(kbd->clk); + if (error) + return error; + + error = input_register_device(input_dev); + if (error) { + dev_err(&pdev->dev, "Unable to register keyboard device\n"); + clk_unprepare(kbd->clk); + return error; + } + + device_init_wakeup(&pdev->dev, 1); + platform_set_drvdata(pdev, kbd); + + return 0; +} + +static int spear_kbd_remove(struct platform_device *pdev) +{ + struct spear_kbd *kbd = platform_get_drvdata(pdev); + + input_unregister_device(kbd->input); + clk_unprepare(kbd->clk); + + return 0; +} + +static int spear_kbd_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct spear_kbd *kbd = platform_get_drvdata(pdev); + struct input_dev *input_dev = kbd->input; + unsigned int rate = 0, mode_ctl_reg, val; + + mutex_lock(&input_dev->mutex); + + /* explicitly enable clock as we may program device */ + clk_enable(kbd->clk); + + mode_ctl_reg = readl_relaxed(kbd->io_base + MODE_CTL_REG); + + if (device_may_wakeup(&pdev->dev)) { + if (!enable_irq_wake(kbd->irq)) + kbd->irq_wake_enabled = true; + + /* + * reprogram the keyboard operating frequency as on some + * platform it may change during system suspended + */ + if (kbd->suspended_rate) + rate = kbd->suspended_rate / 1000000 - 1; + else + rate = clk_get_rate(kbd->clk) / 1000000 - 1; + + val = mode_ctl_reg & + ~(MODE_CTL_PCLK_FREQ_MSK << MODE_CTL_PCLK_FREQ_SHIFT); + val |= (rate & MODE_CTL_PCLK_FREQ_MSK) + << MODE_CTL_PCLK_FREQ_SHIFT; + writel_relaxed(val, kbd->io_base + MODE_CTL_REG); + + } else { + if (input_device_enabled(input_dev)) { + writel_relaxed(mode_ctl_reg & ~MODE_CTL_START_SCAN, + kbd->io_base + MODE_CTL_REG); + clk_disable(kbd->clk); + } + } + + /* store current configuration */ + if (input_device_enabled(input_dev)) + kbd->mode_ctl_reg = mode_ctl_reg; + + /* restore previous clk state */ + clk_disable(kbd->clk); + + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static int spear_kbd_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct spear_kbd *kbd = platform_get_drvdata(pdev); + struct input_dev *input_dev = kbd->input; + + mutex_lock(&input_dev->mutex); + + if (device_may_wakeup(&pdev->dev)) { + if (kbd->irq_wake_enabled) { + kbd->irq_wake_enabled = false; + disable_irq_wake(kbd->irq); + } + } else { + if (input_device_enabled(input_dev)) + clk_enable(kbd->clk); + } + + /* restore current configuration */ + if (input_device_enabled(input_dev)) + writel_relaxed(kbd->mode_ctl_reg, kbd->io_base + MODE_CTL_REG); + + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(spear_kbd_pm_ops, + spear_kbd_suspend, spear_kbd_resume); + +#ifdef CONFIG_OF +static const struct of_device_id spear_kbd_id_table[] = { + { .compatible = "st,spear300-kbd" }, + {} +}; +MODULE_DEVICE_TABLE(of, spear_kbd_id_table); +#endif + +static struct platform_driver spear_kbd_driver = { + .probe = spear_kbd_probe, + .remove = spear_kbd_remove, + .driver = { + .name = "keyboard", + .pm = pm_sleep_ptr(&spear_kbd_pm_ops), + .of_match_table = of_match_ptr(spear_kbd_id_table), + }, +}; +module_platform_driver(spear_kbd_driver); + +MODULE_AUTHOR("Rajeev Kumar"); +MODULE_DESCRIPTION("SPEAr Keyboard Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3