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/touchscreen/lpc32xx_ts.c | 399 +++++++++++++++++++++++++++++++++ 1 file changed, 399 insertions(+) create mode 100644 drivers/input/touchscreen/lpc32xx_ts.c (limited to 'drivers/input/touchscreen/lpc32xx_ts.c') diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c new file mode 100644 index 000000000..15b5cb763 --- /dev/null +++ b/drivers/input/touchscreen/lpc32xx_ts.c @@ -0,0 +1,399 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * LPC32xx built-in touchscreen driver + * + * Copyright (C) 2010 NXP Semiconductors + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Touchscreen controller register offsets + */ +#define LPC32XX_TSC_STAT 0x00 +#define LPC32XX_TSC_SEL 0x04 +#define LPC32XX_TSC_CON 0x08 +#define LPC32XX_TSC_FIFO 0x0C +#define LPC32XX_TSC_DTR 0x10 +#define LPC32XX_TSC_RTR 0x14 +#define LPC32XX_TSC_UTR 0x18 +#define LPC32XX_TSC_TTR 0x1C +#define LPC32XX_TSC_DXP 0x20 +#define LPC32XX_TSC_MIN_X 0x24 +#define LPC32XX_TSC_MAX_X 0x28 +#define LPC32XX_TSC_MIN_Y 0x2C +#define LPC32XX_TSC_MAX_Y 0x30 +#define LPC32XX_TSC_AUX_UTR 0x34 +#define LPC32XX_TSC_AUX_MIN 0x38 +#define LPC32XX_TSC_AUX_MAX 0x3C + +#define LPC32XX_TSC_STAT_FIFO_OVRRN BIT(8) +#define LPC32XX_TSC_STAT_FIFO_EMPTY BIT(7) + +#define LPC32XX_TSC_SEL_DEFVAL 0x0284 + +#define LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4 (0x1 << 11) +#define LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(s) ((10 - (s)) << 7) +#define LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(s) ((10 - (s)) << 4) +#define LPC32XX_TSC_ADCCON_POWER_UP BIT(2) +#define LPC32XX_TSC_ADCCON_AUTO_EN BIT(0) + +#define LPC32XX_TSC_FIFO_TS_P_LEVEL BIT(31) +#define LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(x) (((x) & 0x03FF0000) >> 16) +#define LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(y) ((y) & 0x000003FF) + +#define LPC32XX_TSC_ADCDAT_VALUE_MASK 0x000003FF + +#define LPC32XX_TSC_MIN_XY_VAL 0x0 +#define LPC32XX_TSC_MAX_XY_VAL 0x3FF + +#define MOD_NAME "ts-lpc32xx" + +#define tsc_readl(dev, reg) \ + __raw_readl((dev)->tsc_base + (reg)) +#define tsc_writel(dev, reg, val) \ + __raw_writel((val), (dev)->tsc_base + (reg)) + +struct lpc32xx_tsc { + struct input_dev *dev; + void __iomem *tsc_base; + int irq; + struct clk *clk; +}; + +static void lpc32xx_fifo_clear(struct lpc32xx_tsc *tsc) +{ + while (!(tsc_readl(tsc, LPC32XX_TSC_STAT) & + LPC32XX_TSC_STAT_FIFO_EMPTY)) + tsc_readl(tsc, LPC32XX_TSC_FIFO); +} + +static irqreturn_t lpc32xx_ts_interrupt(int irq, void *dev_id) +{ + u32 tmp, rv[4], xs[4], ys[4]; + int idx; + struct lpc32xx_tsc *tsc = dev_id; + struct input_dev *input = tsc->dev; + + tmp = tsc_readl(tsc, LPC32XX_TSC_STAT); + + if (tmp & LPC32XX_TSC_STAT_FIFO_OVRRN) { + /* FIFO overflow - throw away samples */ + lpc32xx_fifo_clear(tsc); + return IRQ_HANDLED; + } + + /* + * Gather and normalize 4 samples. Pen-up events may have less + * than 4 samples, but its ok to pop 4 and let the last sample + * pen status check drop the samples. + */ + idx = 0; + while (idx < 4 && + !(tsc_readl(tsc, LPC32XX_TSC_STAT) & + LPC32XX_TSC_STAT_FIFO_EMPTY)) { + tmp = tsc_readl(tsc, LPC32XX_TSC_FIFO); + xs[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK - + LPC32XX_TSC_FIFO_NORMALIZE_X_VAL(tmp); + ys[idx] = LPC32XX_TSC_ADCDAT_VALUE_MASK - + LPC32XX_TSC_FIFO_NORMALIZE_Y_VAL(tmp); + rv[idx] = tmp; + idx++; + } + + /* Data is only valid if pen is still down in last sample */ + if (!(rv[3] & LPC32XX_TSC_FIFO_TS_P_LEVEL) && idx == 4) { + /* Use average of 2nd and 3rd sample for position */ + input_report_abs(input, ABS_X, (xs[1] + xs[2]) / 2); + input_report_abs(input, ABS_Y, (ys[1] + ys[2]) / 2); + input_report_key(input, BTN_TOUCH, 1); + } else { + input_report_key(input, BTN_TOUCH, 0); + } + + input_sync(input); + + return IRQ_HANDLED; +} + +static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc) +{ + /* Disable auto mode */ + tsc_writel(tsc, LPC32XX_TSC_CON, + tsc_readl(tsc, LPC32XX_TSC_CON) & + ~LPC32XX_TSC_ADCCON_AUTO_EN); + + clk_disable_unprepare(tsc->clk); +} + +static int lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc) +{ + u32 tmp; + int err; + + err = clk_prepare_enable(tsc->clk); + if (err) + return err; + + tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP; + + /* Set the TSC FIFO depth to 4 samples @ 10-bits per sample (max) */ + tmp = LPC32XX_TSC_ADCCON_IRQ_TO_FIFO_4 | + LPC32XX_TSC_ADCCON_X_SAMPLE_SIZE(10) | + LPC32XX_TSC_ADCCON_Y_SAMPLE_SIZE(10); + tsc_writel(tsc, LPC32XX_TSC_CON, tmp); + + /* These values are all preset */ + tsc_writel(tsc, LPC32XX_TSC_SEL, LPC32XX_TSC_SEL_DEFVAL); + tsc_writel(tsc, LPC32XX_TSC_MIN_X, LPC32XX_TSC_MIN_XY_VAL); + tsc_writel(tsc, LPC32XX_TSC_MAX_X, LPC32XX_TSC_MAX_XY_VAL); + tsc_writel(tsc, LPC32XX_TSC_MIN_Y, LPC32XX_TSC_MIN_XY_VAL); + tsc_writel(tsc, LPC32XX_TSC_MAX_Y, LPC32XX_TSC_MAX_XY_VAL); + + /* Aux support is not used */ + tsc_writel(tsc, LPC32XX_TSC_AUX_UTR, 0); + tsc_writel(tsc, LPC32XX_TSC_AUX_MIN, 0); + tsc_writel(tsc, LPC32XX_TSC_AUX_MAX, 0); + + /* + * Set sample rate to about 240Hz per X/Y pair. A single measurement + * consists of 4 pairs which gives about a 60Hz sample rate based on + * a stable 32768Hz clock source. Values are in clocks. + * Rate is (32768 / (RTR + XCONV + RTR + YCONV + DXP + TTR + UTR) / 4 + */ + tsc_writel(tsc, LPC32XX_TSC_RTR, 0x2); + tsc_writel(tsc, LPC32XX_TSC_DTR, 0x2); + tsc_writel(tsc, LPC32XX_TSC_TTR, 0x10); + tsc_writel(tsc, LPC32XX_TSC_DXP, 0x4); + tsc_writel(tsc, LPC32XX_TSC_UTR, 88); + + lpc32xx_fifo_clear(tsc); + + /* Enable automatic ts event capture */ + tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN); + + return 0; +} + +static int lpc32xx_ts_open(struct input_dev *dev) +{ + struct lpc32xx_tsc *tsc = input_get_drvdata(dev); + + return lpc32xx_setup_tsc(tsc); +} + +static void lpc32xx_ts_close(struct input_dev *dev) +{ + struct lpc32xx_tsc *tsc = input_get_drvdata(dev); + + lpc32xx_stop_tsc(tsc); +} + +static int lpc32xx_ts_probe(struct platform_device *pdev) +{ + struct lpc32xx_tsc *tsc; + struct input_dev *input; + struct resource *res; + resource_size_t size; + int irq; + int error; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "Can't get memory resource\n"); + return -ENOENT; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + tsc = kzalloc(sizeof(*tsc), GFP_KERNEL); + input = input_allocate_device(); + if (!tsc || !input) { + dev_err(&pdev->dev, "failed allocating memory\n"); + error = -ENOMEM; + goto err_free_mem; + } + + tsc->dev = input; + tsc->irq = irq; + + size = resource_size(res); + + if (!request_mem_region(res->start, size, pdev->name)) { + dev_err(&pdev->dev, "TSC registers are not free\n"); + error = -EBUSY; + goto err_free_mem; + } + + tsc->tsc_base = ioremap(res->start, size); + if (!tsc->tsc_base) { + dev_err(&pdev->dev, "Can't map memory\n"); + error = -ENOMEM; + goto err_release_mem; + } + + tsc->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(tsc->clk)) { + dev_err(&pdev->dev, "failed getting clock\n"); + error = PTR_ERR(tsc->clk); + goto err_unmap; + } + + input->name = MOD_NAME; + input->phys = "lpc32xx/input0"; + input->id.bustype = BUS_HOST; + input->id.vendor = 0x0001; + input->id.product = 0x0002; + input->id.version = 0x0100; + input->dev.parent = &pdev->dev; + input->open = lpc32xx_ts_open; + input->close = lpc32xx_ts_close; + + input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + input_set_abs_params(input, ABS_X, LPC32XX_TSC_MIN_XY_VAL, + LPC32XX_TSC_MAX_XY_VAL, 0, 0); + input_set_abs_params(input, ABS_Y, LPC32XX_TSC_MIN_XY_VAL, + LPC32XX_TSC_MAX_XY_VAL, 0, 0); + + input_set_drvdata(input, tsc); + + error = request_irq(tsc->irq, lpc32xx_ts_interrupt, + 0, pdev->name, tsc); + if (error) { + dev_err(&pdev->dev, "failed requesting interrupt\n"); + goto err_put_clock; + } + + error = input_register_device(input); + if (error) { + dev_err(&pdev->dev, "failed registering input device\n"); + goto err_free_irq; + } + + platform_set_drvdata(pdev, tsc); + device_init_wakeup(&pdev->dev, 1); + + return 0; + +err_free_irq: + free_irq(tsc->irq, tsc); +err_put_clock: + clk_put(tsc->clk); +err_unmap: + iounmap(tsc->tsc_base); +err_release_mem: + release_mem_region(res->start, size); +err_free_mem: + input_free_device(input); + kfree(tsc); + + return error; +} + +static int lpc32xx_ts_remove(struct platform_device *pdev) +{ + struct lpc32xx_tsc *tsc = platform_get_drvdata(pdev); + struct resource *res; + + free_irq(tsc->irq, tsc); + + input_unregister_device(tsc->dev); + + clk_put(tsc->clk); + + iounmap(tsc->tsc_base); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, resource_size(res)); + + kfree(tsc); + + return 0; +} + +#ifdef CONFIG_PM +static int lpc32xx_ts_suspend(struct device *dev) +{ + struct lpc32xx_tsc *tsc = dev_get_drvdata(dev); + struct input_dev *input = tsc->dev; + + /* + * Suspend and resume can be called when the device hasn't been + * enabled. If there are no users that have the device open, then + * avoid calling the TSC stop and start functions as the TSC + * isn't yet clocked. + */ + mutex_lock(&input->mutex); + + if (input_device_enabled(input)) { + if (device_may_wakeup(dev)) + enable_irq_wake(tsc->irq); + else + lpc32xx_stop_tsc(tsc); + } + + mutex_unlock(&input->mutex); + + return 0; +} + +static int lpc32xx_ts_resume(struct device *dev) +{ + struct lpc32xx_tsc *tsc = dev_get_drvdata(dev); + struct input_dev *input = tsc->dev; + + mutex_lock(&input->mutex); + + if (input_device_enabled(input)) { + if (device_may_wakeup(dev)) + disable_irq_wake(tsc->irq); + else + lpc32xx_setup_tsc(tsc); + } + + mutex_unlock(&input->mutex); + + return 0; +} + +static const struct dev_pm_ops lpc32xx_ts_pm_ops = { + .suspend = lpc32xx_ts_suspend, + .resume = lpc32xx_ts_resume, +}; +#define LPC32XX_TS_PM_OPS (&lpc32xx_ts_pm_ops) +#else +#define LPC32XX_TS_PM_OPS NULL +#endif + +#ifdef CONFIG_OF +static const struct of_device_id lpc32xx_tsc_of_match[] = { + { .compatible = "nxp,lpc3220-tsc", }, + { }, +}; +MODULE_DEVICE_TABLE(of, lpc32xx_tsc_of_match); +#endif + +static struct platform_driver lpc32xx_ts_driver = { + .probe = lpc32xx_ts_probe, + .remove = lpc32xx_ts_remove, + .driver = { + .name = MOD_NAME, + .pm = LPC32XX_TS_PM_OPS, + .of_match_table = of_match_ptr(lpc32xx_tsc_of_match), + }, +}; +module_platform_driver(lpc32xx_ts_driver); + +MODULE_AUTHOR("Kevin Wells