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/cy8ctma140.c | 352 +++++++++++++++++++++++++++++++++ 1 file changed, 352 insertions(+) create mode 100644 drivers/input/touchscreen/cy8ctma140.c (limited to 'drivers/input/touchscreen/cy8ctma140.c') diff --git a/drivers/input/touchscreen/cy8ctma140.c b/drivers/input/touchscreen/cy8ctma140.c new file mode 100644 index 000000000..3a91d948b --- /dev/null +++ b/drivers/input/touchscreen/cy8ctma140.c @@ -0,0 +1,352 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Driver for Cypress CY8CTMA140 (TMA140) touchscreen + * (C) 2020 Linus Walleij + * (C) 2007 Cypress + * (C) 2007 Google, Inc. + * + * Inspired by the tma140_skomer.c driver in the Samsung GT-S7710 code + * drop. The GT-S7710 is codenamed "Skomer", the code also indicates + * that the same touchscreen was used in a product called "Lucas". + * + * The code drop for GT-S7710 also contains a firmware downloader and + * 15 (!) versions of the firmware drop from Cypress. But here we assume + * the firmware got downloaded to the touchscreen flash successfully and + * just use it to read the fingers. The shipped vendor driver does the + * same. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CY8CTMA140_NAME "cy8ctma140" + +#define CY8CTMA140_MAX_FINGERS 4 + +#define CY8CTMA140_GET_FINGERS 0x00 +#define CY8CTMA140_GET_FW_INFO 0x19 + +/* This message also fits some bytes for touchkeys, if used */ +#define CY8CTMA140_PACKET_SIZE 31 + +#define CY8CTMA140_INVALID_BUFFER_BIT 5 + +struct cy8ctma140 { + struct input_dev *input; + struct touchscreen_properties props; + struct device *dev; + struct i2c_client *client; + struct regulator_bulk_data regulators[2]; + u8 prev_fingers; + u8 prev_f1id; + u8 prev_f2id; +}; + +static void cy8ctma140_report(struct cy8ctma140 *ts, u8 *data, int n_fingers) +{ + static const u8 contact_offsets[] = { 0x03, 0x09, 0x10, 0x16 }; + u8 *buf; + u16 x, y; + u8 w; + u8 id; + int slot; + int i; + + for (i = 0; i < n_fingers; i++) { + buf = &data[contact_offsets[i]]; + + /* + * Odd contacts have contact ID in the lower nibble of + * the preceding byte, whereas even contacts have it in + * the upper nibble of the following byte. + */ + id = i % 2 ? buf[-1] & 0x0f : buf[5] >> 4; + slot = input_mt_get_slot_by_key(ts->input, id); + if (slot < 0) + continue; + + x = get_unaligned_be16(buf); + y = get_unaligned_be16(buf + 2); + w = buf[4]; + + dev_dbg(ts->dev, "finger %d: ID %02x (%d, %d) w: %d\n", + slot, id, x, y, w); + + input_mt_slot(ts->input, slot); + input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true); + touchscreen_report_pos(ts->input, &ts->props, x, y, true); + input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, w); + } + + input_mt_sync_frame(ts->input); + input_sync(ts->input); +} + +static irqreturn_t cy8ctma140_irq_thread(int irq, void *d) +{ + struct cy8ctma140 *ts = d; + u8 cmdbuf[] = { CY8CTMA140_GET_FINGERS }; + u8 buf[CY8CTMA140_PACKET_SIZE]; + struct i2c_msg msg[] = { + { + .addr = ts->client->addr, + .flags = 0, + .len = sizeof(cmdbuf), + .buf = cmdbuf, + }, { + .addr = ts->client->addr, + .flags = I2C_M_RD, + .len = sizeof(buf), + .buf = buf, + }, + }; + u8 n_fingers; + int ret; + + ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg)); + if (ret != ARRAY_SIZE(msg)) { + if (ret < 0) + dev_err(ts->dev, "error reading message: %d\n", ret); + else + dev_err(ts->dev, "wrong number of messages\n"); + goto out; + } + + if (buf[1] & BIT(CY8CTMA140_INVALID_BUFFER_BIT)) { + dev_dbg(ts->dev, "invalid event\n"); + goto out; + } + + n_fingers = buf[2] & 0x0f; + if (n_fingers > CY8CTMA140_MAX_FINGERS) { + dev_err(ts->dev, "unexpected number of fingers: %d\n", + n_fingers); + goto out; + } + + cy8ctma140_report(ts, buf, n_fingers); + +out: + return IRQ_HANDLED; +} + +static int cy8ctma140_init(struct cy8ctma140 *ts) +{ + u8 addr[1]; + u8 buf[5]; + int ret; + + addr[0] = CY8CTMA140_GET_FW_INFO; + ret = i2c_master_send(ts->client, addr, 1); + if (ret < 0) { + dev_err(ts->dev, "error sending FW info message\n"); + return ret; + } + ret = i2c_master_recv(ts->client, buf, 5); + if (ret < 0) { + dev_err(ts->dev, "error receiving FW info message\n"); + return ret; + } + if (ret != 5) { + dev_err(ts->dev, "got only %d bytes\n", ret); + return -EIO; + } + + dev_dbg(ts->dev, "vendor %c%c, HW ID %.2d, FW ver %.4d\n", + buf[0], buf[1], buf[3], buf[4]); + + return 0; +} + +static int cy8ctma140_power_up(struct cy8ctma140 *ts) +{ + int error; + + error = regulator_bulk_enable(ARRAY_SIZE(ts->regulators), + ts->regulators); + if (error) { + dev_err(ts->dev, "failed to enable regulators\n"); + return error; + } + + msleep(250); + + return 0; +} + +static void cy8ctma140_power_down(struct cy8ctma140 *ts) +{ + regulator_bulk_disable(ARRAY_SIZE(ts->regulators), + ts->regulators); +} + +/* Called from the registered devm action */ +static void cy8ctma140_power_off_action(void *d) +{ + struct cy8ctma140 *ts = d; + + cy8ctma140_power_down(ts); +} + +static int cy8ctma140_probe(struct i2c_client *client) +{ + struct cy8ctma140 *ts; + struct input_dev *input; + struct device *dev = &client->dev; + int error; + + ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); + if (!ts) + return -ENOMEM; + + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + ts->dev = dev; + ts->client = client; + ts->input = input; + + input_set_capability(input, EV_ABS, ABS_MT_POSITION_X); + input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y); + /* One byte for width 0..255 so this is the limit */ + input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); + /* + * This sets up event max/min capabilities and fuzz. + * Some DT properties are compulsory so we do not need + * to provide defaults for X/Y max or pressure max. + * + * We just initialize a very simple MT touchscreen here, + * some devices use the capability of this touchscreen to + * provide touchkeys, and in that case this needs to be + * extended to handle touchkey input. + * + * The firmware takes care of finger tracking and dropping + * invalid ranges. + */ + touchscreen_parse_properties(input, true, &ts->props); + input_abs_set_fuzz(input, ABS_MT_POSITION_X, 0); + input_abs_set_fuzz(input, ABS_MT_POSITION_Y, 0); + + error = input_mt_init_slots(input, CY8CTMA140_MAX_FINGERS, + INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); + if (error) + return error; + + input->name = CY8CTMA140_NAME; + input->id.bustype = BUS_I2C; + input_set_drvdata(input, ts); + + /* + * VCPIN is the analog voltage supply + * VDD is the digital voltage supply + * since the voltage range of VDD overlaps that of VCPIN, + * many designs to just supply both with a single voltage + * source of ~3.3 V. + */ + ts->regulators[0].supply = "vcpin"; + ts->regulators[1].supply = "vdd"; + error = devm_regulator_bulk_get(dev, ARRAY_SIZE(ts->regulators), + ts->regulators); + if (error) { + if (error != -EPROBE_DEFER) + dev_err(dev, "Failed to get regulators %d\n", + error); + return error; + } + + error = cy8ctma140_power_up(ts); + if (error) + return error; + + error = devm_add_action_or_reset(dev, cy8ctma140_power_off_action, ts); + if (error) { + dev_err(dev, "failed to install power off handler\n"); + return error; + } + + error = devm_request_threaded_irq(dev, client->irq, + NULL, cy8ctma140_irq_thread, + IRQF_ONESHOT, CY8CTMA140_NAME, ts); + if (error) { + dev_err(dev, "irq %d busy? error %d\n", client->irq, error); + return error; + } + + error = cy8ctma140_init(ts); + if (error) + return error; + + error = input_register_device(input); + if (error) + return error; + + i2c_set_clientdata(client, ts); + + return 0; +} + +static int __maybe_unused cy8ctma140_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct cy8ctma140 *ts = i2c_get_clientdata(client); + + if (!device_may_wakeup(&client->dev)) + cy8ctma140_power_down(ts); + + return 0; +} + +static int __maybe_unused cy8ctma140_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct cy8ctma140 *ts = i2c_get_clientdata(client); + int error; + + if (!device_may_wakeup(&client->dev)) { + error = cy8ctma140_power_up(ts); + if (error) + return error; + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(cy8ctma140_pm, cy8ctma140_suspend, cy8ctma140_resume); + +static const struct i2c_device_id cy8ctma140_idtable[] = { + { CY8CTMA140_NAME, 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(i2c, cy8ctma140_idtable); + +static const struct of_device_id cy8ctma140_of_match[] = { + { .compatible = "cypress,cy8ctma140", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, cy8ctma140_of_match); + +static struct i2c_driver cy8ctma140_driver = { + .driver = { + .name = CY8CTMA140_NAME, + .pm = &cy8ctma140_pm, + .of_match_table = cy8ctma140_of_match, + }, + .id_table = cy8ctma140_idtable, + .probe_new = cy8ctma140_probe, +}; +module_i2c_driver(cy8ctma140_driver); + +MODULE_AUTHOR("Linus Walleij "); +MODULE_DESCRIPTION("CY8CTMA140 TouchScreen Driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3