Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 853 insertions, 0 deletions

diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c
new file mode 100644
index 000000000..669d769ea
--- /dev/null
+++ b/drivers/hid/hid-alps.c
@@ -0,0 +1,853 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/module.h>
+#include <asm/unaligned.h>
+#include "hid-ids.h"
+
+/* ALPS Device Product ID */
+#define HID_PRODUCT_ID_T3_BTNLESS	0xD0C0
+#define HID_PRODUCT_ID_COSMO		0x1202
+#define HID_PRODUCT_ID_U1_PTP_1		0x1207
+#define HID_PRODUCT_ID_U1			0x1209
+#define HID_PRODUCT_ID_U1_PTP_2		0x120A
+#define HID_PRODUCT_ID_U1_DUAL		0x120B
+#define HID_PRODUCT_ID_T4_BTNLESS	0x120C
+
+#define DEV_SINGLEPOINT				0x01
+#define DEV_DUALPOINT				0x02
+
+#define U1_MOUSE_REPORT_ID			0x01 /* Mouse data ReportID */
+#define U1_ABSOLUTE_REPORT_ID		0x03 /* Absolute data ReportID */
+#define U1_ABSOLUTE_REPORT_ID_SECD  0x02 /* FW-PTP Absolute data ReportID */
+#define U1_FEATURE_REPORT_ID		0x05 /* Feature ReportID */
+#define U1_SP_ABSOLUTE_REPORT_ID	0x06 /* Feature ReportID */
+
+#define U1_FEATURE_REPORT_LEN		0x08 /* Feature Report Length */
+#define U1_FEATURE_REPORT_LEN_ALL	0x0A
+#define U1_CMD_REGISTER_READ		0xD1
+#define U1_CMD_REGISTER_WRITE		0xD2
+
+#define	U1_DEVTYPE_SP_SUPPORT		0x10 /* SP Support */
+#define	U1_DISABLE_DEV				0x01
+#define U1_TP_ABS_MODE				0x02
+#define	U1_SP_ABS_MODE				0x80
+
+#define ADDRESS_U1_DEV_CTRL_1	0x00800040
+#define ADDRESS_U1_DEVICE_TYP	0x00800043
+#define ADDRESS_U1_NUM_SENS_X	0x00800047
+#define ADDRESS_U1_NUM_SENS_Y	0x00800048
+#define ADDRESS_U1_PITCH_SENS_X	0x00800049
+#define ADDRESS_U1_PITCH_SENS_Y	0x0080004A
+#define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
+#define ADDRESS_U1_PAD_BTN		0x00800052
+#define ADDRESS_U1_SP_BTN		0x0080009F
+
+#define T4_INPUT_REPORT_LEN			sizeof(struct t4_input_report)
+#define T4_FEATURE_REPORT_LEN		T4_INPUT_REPORT_LEN
+#define T4_FEATURE_REPORT_ID		7
+#define T4_CMD_REGISTER_READ			0x08
+#define T4_CMD_REGISTER_WRITE			0x07
+
+#define T4_ADDRESS_BASE				0xC2C0
+#define PRM_SYS_CONFIG_1			(T4_ADDRESS_BASE + 0x0002)
+#define T4_PRM_FEED_CONFIG_1		(T4_ADDRESS_BASE + 0x0004)
+#define T4_PRM_FEED_CONFIG_4		(T4_ADDRESS_BASE + 0x001A)
+#define T4_PRM_ID_CONFIG_3			(T4_ADDRESS_BASE + 0x00B0)
+
+
+#define T4_FEEDCFG4_ADVANCED_ABS_ENABLE			0x01
+#define T4_I2C_ABS	0x78
+
+#define T4_COUNT_PER_ELECTRODE		256
+#define MAX_TOUCHES	5
+
+enum dev_num {
+	U1,
+	T4,
+	UNKNOWN,
+};
+/**
+ * struct alps_dev
+ *
+ * @input: pointer to the kernel input device
+ * @input2: pointer to the kernel input2 device
+ * @hdev: pointer to the struct hid_device
+ *
+ * @dev_type: device type
+ * @max_fingers: total number of fingers
+ * @has_sp: boolean of sp existense
+ * @sp_btn_info: button information
+ * @x_active_len_mm: active area length of X (mm)
+ * @y_active_len_mm: active area length of Y (mm)
+ * @x_max: maximum x coordinate value
+ * @y_max: maximum y coordinate value
+ * @x_min: minimum x coordinate value
+ * @y_min: minimum y coordinate value
+ * @btn_cnt: number of buttons
+ * @sp_btn_cnt: number of stick buttons
+ */
+struct alps_dev {
+	struct input_dev *input;
+	struct input_dev *input2;
+	struct hid_device *hdev;
+
+	enum dev_num dev_type;
+	u8  max_fingers;
+	u8  has_sp;
+	u8	sp_btn_info;
+	u32	x_active_len_mm;
+	u32	y_active_len_mm;
+	u32	x_max;
+	u32	y_max;
+	u32	x_min;
+	u32	y_min;
+	u32	btn_cnt;
+	u32	sp_btn_cnt;
+};
+
+struct t4_contact_data {
+	u8  palm;
+	u8	x_lo;
+	u8	x_hi;
+	u8	y_lo;
+	u8	y_hi;
+};
+
+struct t4_input_report {
+	u8  reportID;
+	u8  numContacts;
+	struct t4_contact_data contact[5];
+	u8  button;
+	u8  track[5];
+	u8  zx[5], zy[5];
+	u8  palmTime[5];
+	u8  kilroy;
+	u16 timeStamp;
+};
+
+static u16 t4_calc_check_sum(u8 *buffer,
+		unsigned long offset, unsigned long length)
+{
+	u16 sum1 = 0xFF, sum2 = 0xFF;
+	unsigned long i = 0;
+
+	if (offset + length >= 50)
+		return 0;
+
+	while (length > 0) {
+		u32 tlen = length > 20 ? 20 : length;
+
+		length -= tlen;
+
+		do {
+			sum1 += buffer[offset + i];
+			sum2 += sum1;
+			i++;
+		} while (--tlen > 0);
+
+		sum1 = (sum1 & 0xFF) + (sum1 >> 8);
+		sum2 = (sum2 & 0xFF) + (sum2 >> 8);
+	}
+
+	sum1 = (sum1 & 0xFF) + (sum1 >> 8);
+	sum2 = (sum2 & 0xFF) + (sum2 >> 8);
+
+	return(sum2 << 8 | sum1);
+}
+
+static int t4_read_write_register(struct hid_device *hdev, u32 address,
+	u8 *read_val, u8 write_val, bool read_flag)
+{
+	int ret;
+	u16 check_sum;
+	u8 *input;
+	u8 *readbuf = NULL;
+
+	input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
+	if (!input)
+		return -ENOMEM;
+
+	input[0] = T4_FEATURE_REPORT_ID;
+	if (read_flag) {
+		input[1] = T4_CMD_REGISTER_READ;
+		input[8] = 0x00;
+	} else {
+		input[1] = T4_CMD_REGISTER_WRITE;
+		input[8] = write_val;
+	}
+	put_unaligned_le32(address, input + 2);
+	input[6] = 1;
+	input[7] = 0;
+
+	/* Calculate the checksum */
+	check_sum = t4_calc_check_sum(input, 1, 8);
+	input[9] = (u8)check_sum;
+	input[10] = (u8)(check_sum >> 8);
+	input[11] = 0;
+
+	ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, input,
+			T4_FEATURE_REPORT_LEN,
+			HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
+		goto exit;
+	}
+
+	if (read_flag) {
+		readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
+		if (!readbuf) {
+			ret = -ENOMEM;
+			goto exit;
+		}
+
+		ret = hid_hw_raw_request(hdev, T4_FEATURE_REPORT_ID, readbuf,
+				T4_FEATURE_REPORT_LEN,
+				HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
+		if (ret < 0) {
+			dev_err(&hdev->dev, "failed read register (%d)\n", ret);
+			goto exit_readbuf;
+		}
+
+		ret = -EINVAL;
+
+		if (*(u32 *)&readbuf[6] != address) {
+			dev_err(&hdev->dev, "read register address error (%x,%x)\n",
+				*(u32 *)&readbuf[6], address);
+			goto exit_readbuf;
+		}
+
+		if (*(u16 *)&readbuf[10] != 1) {
+			dev_err(&hdev->dev, "read register size error (%x)\n",
+				*(u16 *)&readbuf[10]);
+			goto exit_readbuf;
+		}
+
+		check_sum = t4_calc_check_sum(readbuf, 6, 7);
+		if (*(u16 *)&readbuf[13] != check_sum) {
+			dev_err(&hdev->dev, "read register checksum error (%x,%x)\n",
+				*(u16 *)&readbuf[13], check_sum);
+			goto exit_readbuf;
+		}
+
+		*read_val = readbuf[12];
+	}
+
+	ret = 0;
+
+exit_readbuf:
+	kfree(readbuf);
+exit:
+	kfree(input);
+	return ret;
+}
+
+static int u1_read_write_register(struct hid_device *hdev, u32 address,
+	u8 *read_val, u8 write_val, bool read_flag)
+{
+	int ret, i;
+	u8 check_sum;
+	u8 *input;
+	u8 *readbuf;
+
+	input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
+	if (!input)
+		return -ENOMEM;
+
+	input[0] = U1_FEATURE_REPORT_ID;
+	if (read_flag) {
+		input[1] = U1_CMD_REGISTER_READ;
+		input[6] = 0x00;
+	} else {
+		input[1] = U1_CMD_REGISTER_WRITE;
+		input[6] = write_val;
+	}
+
+	put_unaligned_le32(address, input + 2);
+
+	/* Calculate the checksum */
+	check_sum = U1_FEATURE_REPORT_LEN_ALL;
+	for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
+		check_sum += input[i];
+
+	input[7] = check_sum;
+	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
+			U1_FEATURE_REPORT_LEN,
+			HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
+		goto exit;
+	}
+
+	if (read_flag) {
+		readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
+		if (!readbuf) {
+			ret = -ENOMEM;
+			goto exit;
+		}
+
+		ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
+				U1_FEATURE_REPORT_LEN,
+				HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
+
+		if (ret < 0) {
+			dev_err(&hdev->dev, "failed read register (%d)\n", ret);
+			kfree(readbuf);
+			goto exit;
+		}
+
+		*read_val = readbuf[6];
+
+		kfree(readbuf);
+	}
+
+	ret = 0;
+
+exit:
+	kfree(input);
+	return ret;
+}
+
+static int t4_raw_event(struct alps_dev *hdata, u8 *data, int size)
+{
+	unsigned int x, y, z;
+	int i;
+	struct t4_input_report *p_report = (struct t4_input_report *)data;
+
+	if (!data)
+		return 0;
+	for (i = 0; i < hdata->max_fingers; i++) {
+		x = p_report->contact[i].x_hi << 8 | p_report->contact[i].x_lo;
+		y = p_report->contact[i].y_hi << 8 | p_report->contact[i].y_lo;
+		y = hdata->y_max - y + hdata->y_min;
+		z = (p_report->contact[i].palm < 0x80 &&
+			p_report->contact[i].palm > 0) * 62;
+		if (x == 0xffff) {
+			x = 0;
+			y = 0;
+			z = 0;
+		}
+		input_mt_slot(hdata->input, i);
+
+		input_mt_report_slot_state(hdata->input,
+			MT_TOOL_FINGER, z != 0);
+
+		if (!z)
+			continue;
+
+		input_report_abs(hdata->input, ABS_MT_POSITION_X, x);
+		input_report_abs(hdata->input, ABS_MT_POSITION_Y, y);
+		input_report_abs(hdata->input, ABS_MT_PRESSURE, z);
+	}
+	input_mt_sync_frame(hdata->input);
+
+	input_report_key(hdata->input, BTN_LEFT, p_report->button);
+
+	input_sync(hdata->input);
+	return 1;
+}
+
+static int u1_raw_event(struct alps_dev *hdata, u8 *data, int size)
+{
+	unsigned int x, y, z;
+	int i;
+	short sp_x, sp_y;
+
+	if (!data)
+		return 0;
+	switch (data[0]) {
+	case U1_MOUSE_REPORT_ID:
+		break;
+	case U1_FEATURE_REPORT_ID:
+		break;
+	case U1_ABSOLUTE_REPORT_ID:
+	case U1_ABSOLUTE_REPORT_ID_SECD:
+		for (i = 0; i < hdata->max_fingers; i++) {
+			u8 *contact = &data[i * 5];
+
+			x = get_unaligned_le16(contact + 3);
+			y = get_unaligned_le16(contact + 5);
+			z = contact[7] & 0x7F;
+
+			input_mt_slot(hdata->input, i);
+
+			if (z != 0) {
+				input_mt_report_slot_state(hdata->input,
+					MT_TOOL_FINGER, 1);
+				input_report_abs(hdata->input,
+					ABS_MT_POSITION_X, x);
+				input_report_abs(hdata->input,
+					ABS_MT_POSITION_Y, y);
+				input_report_abs(hdata->input,
+					ABS_MT_PRESSURE, z);
+			} else {
+				input_mt_report_slot_inactive(hdata->input);
+			}
+		}
+
+		input_mt_sync_frame(hdata->input);
+
+		input_report_key(hdata->input, BTN_LEFT,
+			data[1] & 0x1);
+		input_report_key(hdata->input, BTN_RIGHT,
+			(data[1] & 0x2));
+		input_report_key(hdata->input, BTN_MIDDLE,
+			(data[1] & 0x4));
+
+		input_sync(hdata->input);
+
+		return 1;
+
+	case U1_SP_ABSOLUTE_REPORT_ID:
+		sp_x = get_unaligned_le16(data+2);
+		sp_y = get_unaligned_le16(data+4);
+
+		sp_x = sp_x / 8;
+		sp_y = sp_y / 8;
+
+		input_report_rel(hdata->input2, REL_X, sp_x);
+		input_report_rel(hdata->input2, REL_Y, sp_y);
+
+		input_report_key(hdata->input2, BTN_LEFT,
+			data[1] & 0x1);
+		input_report_key(hdata->input2, BTN_RIGHT,
+			(data[1] & 0x2));
+		input_report_key(hdata->input2, BTN_MIDDLE,
+			(data[1] & 0x4));
+
+		input_sync(hdata->input2);
+
+		return 1;
+	}
+
+	return 0;
+}
+
+static int alps_raw_event(struct hid_device *hdev,
+		struct hid_report *report, u8 *data, int size)
+{
+	int ret = 0;
+	struct alps_dev *hdata = hid_get_drvdata(hdev);
+
+	switch (hdev->product) {
+	case HID_PRODUCT_ID_T4_BTNLESS:
+		ret = t4_raw_event(hdata, data, size);
+		break;
+	default:
+		ret = u1_raw_event(hdata, data, size);
+		break;
+	}
+	return ret;
+}
+
+static int __maybe_unused alps_post_reset(struct hid_device *hdev)
+{
+	int ret = -1;
+	struct alps_dev *data = hid_get_drvdata(hdev);
+
+	switch (data->dev_type) {
+	case T4:
+		ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
+			NULL, T4_I2C_ABS, false);
+		if (ret < 0) {
+			dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n",
+				ret);
+			goto exit;
+		}
+
+		ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4,
+			NULL, T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
+		if (ret < 0) {
+			dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n",
+				ret);
+			goto exit;
+		}
+		break;
+	case U1:
+		ret = u1_read_write_register(hdev,
+			ADDRESS_U1_DEV_CTRL_1, NULL,
+			U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
+		if (ret < 0) {
+			dev_err(&hdev->dev, "failed to change TP mode (%d)\n",
+				ret);
+			goto exit;
+		}
+		break;
+	default:
+		break;
+	}
+
+exit:
+	return ret;
+}
+
+static int __maybe_unused alps_post_resume(struct hid_device *hdev)
+{
+	return alps_post_reset(hdev);
+}
+
+static int u1_init(struct hid_device *hdev, struct alps_dev *pri_data)
+{
+	int ret;
+	u8 tmp, dev_ctrl, sen_line_num_x, sen_line_num_y;
+	u8 pitch_x, pitch_y, resolution;
+
+	/* Device initialization */
+	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
+			&dev_ctrl, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
+		goto exit;
+	}
+
+	dev_ctrl &= ~U1_DISABLE_DEV;
+	dev_ctrl |= U1_TP_ABS_MODE;
+	ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
+			NULL, dev_ctrl, false);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
+		goto exit;
+	}
+
+	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
+			&sen_line_num_x, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
+		goto exit;
+	}
+
+	ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
+			&sen_line_num_y, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
+		goto exit;
+	}
+
+	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
+			&pitch_x, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
+		goto exit;
+	}
+
+	ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
+			&pitch_y, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
+		goto exit;
+	}
+
+	ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
+		&resolution, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
+		goto exit;
+	}
+	pri_data->x_active_len_mm =
+		(pitch_x * (sen_line_num_x - 1)) / 10;
+	pri_data->y_active_len_mm =
+		(pitch_y * (sen_line_num_y - 1)) / 10;
+
+	pri_data->x_max =
+		(resolution << 2) * (sen_line_num_x - 1);
+	pri_data->x_min = 1;
+	pri_data->y_max =
+		(resolution << 2) * (sen_line_num_y - 1);
+	pri_data->y_min = 1;
+
+	ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
+			&tmp, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
+		goto exit;
+	}
+	if ((tmp & 0x0F) == (tmp & 0xF0) >> 4) {
+		pri_data->btn_cnt = (tmp & 0x0F);
+	} else {
+		/* Button pad */
+		pri_data->btn_cnt = 1;
+	}
+
+	pri_data->has_sp = 0;
+	/* Check StickPointer device */
+	ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
+			&tmp, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
+		goto exit;
+	}
+	if (tmp & U1_DEVTYPE_SP_SUPPORT) {
+		dev_ctrl |= U1_SP_ABS_MODE;
+		ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
+			NULL, dev_ctrl, false);
+		if (ret < 0) {
+			dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
+			goto exit;
+		}
+
+		ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
+			&pri_data->sp_btn_info, 0, true);
+		if (ret < 0) {
+			dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
+			goto exit;
+		}
+		pri_data->has_sp = 1;
+	}
+	pri_data->max_fingers = 5;
+exit:
+	return ret;
+}
+
+static int T4_init(struct hid_device *hdev, struct alps_dev *pri_data)
+{
+	int ret;
+	u8 tmp, sen_line_num_x, sen_line_num_y;
+
+	ret = t4_read_write_register(hdev, T4_PRM_ID_CONFIG_3, &tmp, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed T4_PRM_ID_CONFIG_3 (%d)\n", ret);
+		goto exit;
+	}
+	sen_line_num_x = 16 + ((tmp & 0x0F)  | (tmp & 0x08 ? 0xF0 : 0));
+	sen_line_num_y = 12 + (((tmp & 0xF0) >> 4)  | (tmp & 0x80 ? 0xF0 : 0));
+
+	pri_data->x_max = sen_line_num_x * T4_COUNT_PER_ELECTRODE;
+	pri_data->x_min = T4_COUNT_PER_ELECTRODE;
+	pri_data->y_max = sen_line_num_y * T4_COUNT_PER_ELECTRODE;
+	pri_data->y_min = T4_COUNT_PER_ELECTRODE;
+	pri_data->x_active_len_mm = pri_data->y_active_len_mm = 0;
+	pri_data->btn_cnt = 1;
+
+	ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, &tmp, 0, true);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
+		goto exit;
+	}
+	tmp |= 0x02;
+	ret = t4_read_write_register(hdev, PRM_SYS_CONFIG_1, NULL, tmp, false);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed PRM_SYS_CONFIG_1 (%d)\n", ret);
+		goto exit;
+	}
+
+	ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_1,
+					NULL, T4_I2C_ABS, false);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_1 (%d)\n", ret);
+		goto exit;
+	}
+
+	ret = t4_read_write_register(hdev, T4_PRM_FEED_CONFIG_4, NULL,
+				T4_FEEDCFG4_ADVANCED_ABS_ENABLE, false);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed T4_PRM_FEED_CONFIG_4 (%d)\n", ret);
+		goto exit;
+	}
+	pri_data->max_fingers = 5;
+	pri_data->has_sp = 0;
+exit:
+	return ret;
+}
+
+static int alps_sp_open(struct input_dev *dev)
+{
+	struct hid_device *hid = input_get_drvdata(dev);
+
+	return hid_hw_open(hid);
+}
+
+static void alps_sp_close(struct input_dev *dev)
+{
+	struct hid_device *hid = input_get_drvdata(dev);
+
+	hid_hw_close(hid);
+}
+
+static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
+{
+	struct alps_dev *data = hid_get_drvdata(hdev);
+	struct input_dev *input = hi->input, *input2;
+	int ret;
+	int res_x, res_y, i;
+
+	data->input = input;
+
+	hid_dbg(hdev, "Opening low level driver\n");
+	ret = hid_hw_open(hdev);
+	if (ret)
+		return ret;
+
+	/* Allow incoming hid reports */
+	hid_device_io_start(hdev);
+	switch (data->dev_type) {
+	case T4:
+		ret = T4_init(hdev, data);
+		break;
+	case U1:
+		ret = u1_init(hdev, data);
+		break;
+	default:
+		break;
+	}
+
+	if (ret)
+		goto exit;
+
+	__set_bit(EV_ABS, input->evbit);
+	input_set_abs_params(input, ABS_MT_POSITION_X,
+						data->x_min, data->x_max, 0, 0);
+	input_set_abs_params(input, ABS_MT_POSITION_Y,
+						data->y_min, data->y_max, 0, 0);
+
+	if (data->x_active_len_mm && data->y_active_len_mm) {
+		res_x = (data->x_max - 1) / data->x_active_len_mm;
+		res_y = (data->y_max - 1) / data->y_active_len_mm;
+
+		input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
+		input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
+	}
+
+	input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
+
+	input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER);
+
+	__set_bit(EV_KEY, input->evbit);
+
+	if (data->btn_cnt == 1)
+		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
+
+	for (i = 0; i < data->btn_cnt; i++)
+		__set_bit(BTN_LEFT + i, input->keybit);
+
+	/* Stick device initialization */
+	if (data->has_sp) {
+		input2 = input_allocate_device();
+		if (!input2) {
+			ret = -ENOMEM;
+			goto exit;
+		}
+
+		data->input2 = input2;
+		input2->phys = input->phys;
+		input2->name = "DualPoint Stick";
+		input2->id.bustype = BUS_I2C;
+		input2->id.vendor  = input->id.vendor;
+		input2->id.product = input->id.product;
+		input2->id.version = input->id.version;
+		input2->dev.parent = input->dev.parent;
+
+		input_set_drvdata(input2, hdev);
+		input2->open = alps_sp_open;
+		input2->close = alps_sp_close;
+
+		__set_bit(EV_KEY, input2->evbit);
+		data->sp_btn_cnt = (data->sp_btn_info & 0x0F);
+		for (i = 0; i < data->sp_btn_cnt; i++)
+			__set_bit(BTN_LEFT + i, input2->keybit);
+
+		__set_bit(EV_REL, input2->evbit);
+		__set_bit(REL_X, input2->relbit);
+		__set_bit(REL_Y, input2->relbit);
+		__set_bit(INPUT_PROP_POINTER, input2->propbit);
+		__set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
+
+		if (input_register_device(data->input2)) {
+			input_free_device(input2);
+			ret = -ENOENT;
+			goto exit;
+		}
+	}
+
+exit:
+	hid_device_io_stop(hdev);
+	hid_hw_close(hdev);
+	return ret;
+}
+
+static int alps_input_mapping(struct hid_device *hdev,
+		struct hid_input *hi, struct hid_field *field,
+		struct hid_usage *usage, unsigned long **bit, int *max)
+{
+	return -1;
+}
+
+static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+	struct alps_dev *data = NULL;
+	int ret;
+	data = devm_kzalloc(&hdev->dev, sizeof(struct alps_dev), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->hdev = hdev;
+	hid_set_drvdata(hdev, data);
+
+	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		hid_err(hdev, "parse failed\n");
+		return ret;
+	}
+
+	switch (hdev->product) {
+	case HID_DEVICE_ID_ALPS_T4_BTNLESS:
+		data->dev_type = T4;
+		break;
+	case HID_DEVICE_ID_ALPS_U1_DUAL:
+	case HID_DEVICE_ID_ALPS_U1:
+	case HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY:
+		data->dev_type = U1;
+		break;
+	default:
+		data->dev_type = UNKNOWN;
+	}
+
+	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+	if (ret) {
+		hid_err(hdev, "hw start failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct hid_device_id alps_id[] = {
+	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
+		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
+	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
+		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1) },
+	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
+		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY) },
+	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
+		USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_T4_BTNLESS) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, alps_id);
+
+static struct hid_driver alps_driver = {
+	.name = "hid-alps",
+	.id_table		= alps_id,
+	.probe			= alps_probe,
+	.raw_event		= alps_raw_event,
+	.input_mapping		= alps_input_mapping,
+	.input_configured	= alps_input_configured,
+#ifdef CONFIG_PM
+	.resume			= alps_post_resume,
+	.reset_resume		= alps_post_reset,
+#endif
+};
+
+module_hid_driver(alps_driver);
+
+MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
+MODULE_DESCRIPTION("ALPS HID driver");
+MODULE_LICENSE("GPL");