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/eeti_ts.c | 302 ++++++++++++++++++++++++++++++++++++ 1 file changed, 302 insertions(+) create mode 100644 drivers/input/touchscreen/eeti_ts.c (limited to 'drivers/input/touchscreen/eeti_ts.c') diff --git a/drivers/input/touchscreen/eeti_ts.c b/drivers/input/touchscreen/eeti_ts.c new file mode 100644 index 000000000..c8ab03f49 --- /dev/null +++ b/drivers/input/touchscreen/eeti_ts.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Touch Screen driver for EETI's I2C connected touch screen panels + * Copyright (c) 2009,2018 Daniel Mack + * + * See EETI's software guide for the protocol specification: + * http://home.eeti.com.tw/documentation.html + * + * Based on migor_ts.c + * Copyright (c) 2008 Magnus Damm + * Copyright (c) 2007 Ujjwal Pande + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct eeti_ts { + struct i2c_client *client; + struct input_dev *input; + struct gpio_desc *attn_gpio; + struct touchscreen_properties props; + struct mutex mutex; + bool running; +}; + +#define EETI_TS_BITDEPTH (11) +#define EETI_MAXVAL ((1 << (EETI_TS_BITDEPTH + 1)) - 1) + +#define REPORT_BIT_PRESSED BIT(0) +#define REPORT_BIT_AD0 BIT(1) +#define REPORT_BIT_AD1 BIT(2) +#define REPORT_BIT_HAS_PRESSURE BIT(6) +#define REPORT_RES_BITS(v) (((v) >> 1) + EETI_TS_BITDEPTH) + +static void eeti_ts_report_event(struct eeti_ts *eeti, u8 *buf) +{ + unsigned int res; + u16 x, y; + + res = REPORT_RES_BITS(buf[0] & (REPORT_BIT_AD0 | REPORT_BIT_AD1)); + + x = get_unaligned_be16(&buf[1]); + y = get_unaligned_be16(&buf[3]); + + /* fix the range to 11 bits */ + x >>= res - EETI_TS_BITDEPTH; + y >>= res - EETI_TS_BITDEPTH; + + if (buf[0] & REPORT_BIT_HAS_PRESSURE) + input_report_abs(eeti->input, ABS_PRESSURE, buf[5]); + + touchscreen_report_pos(eeti->input, &eeti->props, x, y, false); + input_report_key(eeti->input, BTN_TOUCH, buf[0] & REPORT_BIT_PRESSED); + input_sync(eeti->input); +} + +static int eeti_ts_read(struct eeti_ts *eeti) +{ + int len, error; + char buf[6]; + + len = i2c_master_recv(eeti->client, buf, sizeof(buf)); + if (len != sizeof(buf)) { + error = len < 0 ? len : -EIO; + dev_err(&eeti->client->dev, + "failed to read touchscreen data: %d\n", + error); + return error; + } + + /* Motion packet */ + if (buf[0] & 0x80) + eeti_ts_report_event(eeti, buf); + + return 0; +} + +static irqreturn_t eeti_ts_isr(int irq, void *dev_id) +{ + struct eeti_ts *eeti = dev_id; + int error; + + mutex_lock(&eeti->mutex); + + do { + /* + * If we have attention GPIO, trust it. Otherwise we'll read + * once and exit. We assume that in this case we are using + * level triggered interrupt and it will get raised again + * if/when there is more data. + */ + if (eeti->attn_gpio && + !gpiod_get_value_cansleep(eeti->attn_gpio)) { + break; + } + + error = eeti_ts_read(eeti); + if (error) + break; + + } while (eeti->running && eeti->attn_gpio); + + mutex_unlock(&eeti->mutex); + return IRQ_HANDLED; +} + +static void eeti_ts_start(struct eeti_ts *eeti) +{ + mutex_lock(&eeti->mutex); + + eeti->running = true; + enable_irq(eeti->client->irq); + + /* + * Kick the controller in case we are using edge interrupt and + * we missed our edge while interrupt was disabled. We expect + * the attention GPIO to be wired in this case. + */ + if (eeti->attn_gpio && gpiod_get_value_cansleep(eeti->attn_gpio)) + eeti_ts_read(eeti); + + mutex_unlock(&eeti->mutex); +} + +static void eeti_ts_stop(struct eeti_ts *eeti) +{ + /* + * Not locking here, just setting a flag and expect that the + * interrupt thread will notice the flag eventually. + */ + eeti->running = false; + wmb(); + disable_irq(eeti->client->irq); +} + +static int eeti_ts_open(struct input_dev *dev) +{ + struct eeti_ts *eeti = input_get_drvdata(dev); + + eeti_ts_start(eeti); + + return 0; +} + +static void eeti_ts_close(struct input_dev *dev) +{ + struct eeti_ts *eeti = input_get_drvdata(dev); + + eeti_ts_stop(eeti); +} + +static int eeti_ts_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct eeti_ts *eeti; + struct input_dev *input; + int error; + + /* + * In contrast to what's described in the datasheet, there seems + * to be no way of probing the presence of that device using I2C + * commands. So we need to blindly believe it is there, and wait + * for interrupts to occur. + */ + + eeti = devm_kzalloc(dev, sizeof(*eeti), GFP_KERNEL); + if (!eeti) { + dev_err(dev, "failed to allocate driver data\n"); + return -ENOMEM; + } + + mutex_init(&eeti->mutex); + + input = devm_input_allocate_device(dev); + if (!input) { + dev_err(dev, "Failed to allocate input device.\n"); + return -ENOMEM; + } + + input_set_capability(input, EV_KEY, BTN_TOUCH); + + input_set_abs_params(input, ABS_X, 0, EETI_MAXVAL, 0, 0); + input_set_abs_params(input, ABS_Y, 0, EETI_MAXVAL, 0, 0); + input_set_abs_params(input, ABS_PRESSURE, 0, 0xff, 0, 0); + + touchscreen_parse_properties(input, false, &eeti->props); + + input->name = client->name; + input->id.bustype = BUS_I2C; + input->open = eeti_ts_open; + input->close = eeti_ts_close; + + eeti->client = client; + eeti->input = input; + + eeti->attn_gpio = devm_gpiod_get_optional(dev, "attn", GPIOD_IN); + if (IS_ERR(eeti->attn_gpio)) + return PTR_ERR(eeti->attn_gpio); + + i2c_set_clientdata(client, eeti); + input_set_drvdata(input, eeti); + + error = devm_request_threaded_irq(dev, client->irq, + NULL, eeti_ts_isr, + IRQF_ONESHOT, + client->name, eeti); + if (error) { + dev_err(dev, "Unable to request touchscreen IRQ: %d\n", + error); + return error; + } + + /* + * Disable the device for now. It will be enabled once the + * input device is opened. + */ + eeti_ts_stop(eeti); + + error = input_register_device(input); + if (error) + return error; + + return 0; +} + +static int __maybe_unused eeti_ts_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct eeti_ts *eeti = i2c_get_clientdata(client); + struct input_dev *input_dev = eeti->input; + + mutex_lock(&input_dev->mutex); + + if (input_device_enabled(input_dev)) + eeti_ts_stop(eeti); + + mutex_unlock(&input_dev->mutex); + + if (device_may_wakeup(&client->dev)) + enable_irq_wake(client->irq); + + return 0; +} + +static int __maybe_unused eeti_ts_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct eeti_ts *eeti = i2c_get_clientdata(client); + struct input_dev *input_dev = eeti->input; + + if (device_may_wakeup(&client->dev)) + disable_irq_wake(client->irq); + + mutex_lock(&input_dev->mutex); + + if (input_device_enabled(input_dev)) + eeti_ts_start(eeti); + + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(eeti_ts_pm, eeti_ts_suspend, eeti_ts_resume); + +static const struct i2c_device_id eeti_ts_id[] = { + { "eeti_ts", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, eeti_ts_id); + +#ifdef CONFIG_OF +static const struct of_device_id of_eeti_ts_match[] = { + { .compatible = "eeti,exc3000-i2c", }, + { } +}; +#endif + +static struct i2c_driver eeti_ts_driver = { + .driver = { + .name = "eeti_ts", + .pm = &eeti_ts_pm, + .of_match_table = of_match_ptr(of_eeti_ts_match), + }, + .probe_new = eeti_ts_probe, + .id_table = eeti_ts_id, +}; + +module_i2c_driver(eeti_ts_driver); + +MODULE_DESCRIPTION("EETI Touchscreen driver"); +MODULE_AUTHOR("Daniel Mack "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3