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, 1067 insertions, 0 deletions

diff --git a/drivers/input/mouse/sentelic.c b/drivers/input/mouse/sentelic.c
new file mode 100644
index 000000000..2716d2ba3
--- /dev/null
+++ b/drivers/input/mouse/sentelic.c
@@ -0,0 +1,1067 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*-
+ * Finger Sensing Pad PS/2 mouse driver.
+ *
+ * Copyright (C) 2005-2007 Asia Vital Components Co., Ltd.
+ * Copyright (C) 2005-2012 Tai-hwa Liang, Sentelic Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/ctype.h>
+#include <linux/libps2.h>
+#include <linux/serio.h>
+#include <linux/jiffies.h>
+#include <linux/slab.h>
+
+#include "psmouse.h"
+#include "sentelic.h"
+
+/*
+ * Timeout for FSP PS/2 command only (in milliseconds).
+ */
+#define	FSP_CMD_TIMEOUT		200
+#define	FSP_CMD_TIMEOUT2	30
+
+#define	GET_ABS_X(packet)	((packet[1] << 2) | ((packet[3] >> 2) & 0x03))
+#define	GET_ABS_Y(packet)	((packet[2] << 2) | (packet[3] & 0x03))
+
+/** Driver version. */
+static const char fsp_drv_ver[] = "1.1.0-K";
+
+/*
+ * Make sure that the value being sent to FSP will not conflict with
+ * possible sample rate values.
+ */
+static unsigned char fsp_test_swap_cmd(unsigned char reg_val)
+{
+	switch (reg_val) {
+	case 10: case 20: case 40: case 60: case 80: case 100: case 200:
+		/*
+		 * The requested value being sent to FSP matched to possible
+		 * sample rates, swap the given value such that the hardware
+		 * wouldn't get confused.
+		 */
+		return (reg_val >> 4) | (reg_val << 4);
+	default:
+		return reg_val;	/* swap isn't necessary */
+	}
+}
+
+/*
+ * Make sure that the value being sent to FSP will not conflict with certain
+ * commands.
+ */
+static unsigned char fsp_test_invert_cmd(unsigned char reg_val)
+{
+	switch (reg_val) {
+	case 0xe9: case 0xee: case 0xf2: case 0xff:
+		/*
+		 * The requested value being sent to FSP matched to certain
+		 * commands, inverse the given value such that the hardware
+		 * wouldn't get confused.
+		 */
+		return ~reg_val;
+	default:
+		return reg_val;	/* inversion isn't necessary */
+	}
+}
+
+static int fsp_reg_read(struct psmouse *psmouse, int reg_addr, int *reg_val)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	unsigned char param[3];
+	unsigned char addr;
+	int rc = -1;
+
+	/*
+	 * We need to shut off the device and switch it into command
+	 * mode so we don't confuse our protocol handler. We don't need
+	 * to do that for writes because sysfs set helper does this for
+	 * us.
+	 */
+	psmouse_deactivate(psmouse);
+
+	ps2_begin_command(ps2dev);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	/* should return 0xfe(request for resending) */
+	ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
+	/* should return 0xfc(failed) */
+	ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	if ((addr = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
+		ps2_sendbyte(ps2dev, 0x68, FSP_CMD_TIMEOUT2);
+	} else if ((addr = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
+		/* swapping is required */
+		ps2_sendbyte(ps2dev, 0xcc, FSP_CMD_TIMEOUT2);
+		/* expect 0xfe */
+	} else {
+		/* swapping isn't necessary */
+		ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
+		/* expect 0xfe */
+	}
+	/* should return 0xfc(failed) */
+	ps2_sendbyte(ps2dev, addr, FSP_CMD_TIMEOUT);
+
+	if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) < 0)
+		goto out;
+
+	*reg_val = param[2];
+	rc = 0;
+
+ out:
+	ps2_end_command(ps2dev);
+	psmouse_activate(psmouse);
+	psmouse_dbg(psmouse,
+		    "READ REG: 0x%02x is 0x%02x (rc = %d)\n",
+		    reg_addr, *reg_val, rc);
+	return rc;
+}
+
+static int fsp_reg_write(struct psmouse *psmouse, int reg_addr, int reg_val)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	unsigned char v;
+	int rc = -1;
+
+	ps2_begin_command(ps2dev);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	if ((v = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
+		/* inversion is required */
+		ps2_sendbyte(ps2dev, 0x74, FSP_CMD_TIMEOUT2);
+	} else {
+		if ((v = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
+			/* swapping is required */
+			ps2_sendbyte(ps2dev, 0x77, FSP_CMD_TIMEOUT2);
+		} else {
+			/* swapping isn't necessary */
+			ps2_sendbyte(ps2dev, 0x55, FSP_CMD_TIMEOUT2);
+		}
+	}
+	/* write the register address in correct order */
+	ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
+		/* inversion is required */
+		ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
+	} else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
+		/* swapping is required */
+		ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
+	} else {
+		/* swapping isn't necessary */
+		ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
+	}
+
+	/* write the register value in correct order */
+	ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
+	rc = 0;
+
+ out:
+	ps2_end_command(ps2dev);
+	psmouse_dbg(psmouse,
+		    "WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
+		    reg_addr, reg_val, rc);
+	return rc;
+}
+
+/* Enable register clock gating for writing certain registers */
+static int fsp_reg_write_enable(struct psmouse *psmouse, bool enable)
+{
+	int v, nv;
+
+	if (fsp_reg_read(psmouse, FSP_REG_SYSCTL1, &v) == -1)
+		return -1;
+
+	if (enable)
+		nv = v | FSP_BIT_EN_REG_CLK;
+	else
+		nv = v & ~FSP_BIT_EN_REG_CLK;
+
+	/* only write if necessary */
+	if (nv != v)
+		if (fsp_reg_write(psmouse, FSP_REG_SYSCTL1, nv) == -1)
+			return -1;
+
+	return 0;
+}
+
+static int fsp_page_reg_read(struct psmouse *psmouse, int *reg_val)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	unsigned char param[3];
+	int rc = -1;
+
+	psmouse_deactivate(psmouse);
+
+	ps2_begin_command(ps2dev);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
+	ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	ps2_sendbyte(ps2dev, 0x83, FSP_CMD_TIMEOUT2);
+	ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
+
+	/* get the returned result */
+	if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
+		goto out;
+
+	*reg_val = param[2];
+	rc = 0;
+
+ out:
+	ps2_end_command(ps2dev);
+	psmouse_activate(psmouse);
+	psmouse_dbg(psmouse,
+		    "READ PAGE REG: 0x%02x (rc = %d)\n",
+		    *reg_val, rc);
+	return rc;
+}
+
+static int fsp_page_reg_write(struct psmouse *psmouse, int reg_val)
+{
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	unsigned char v;
+	int rc = -1;
+
+	ps2_begin_command(ps2dev);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	ps2_sendbyte(ps2dev, 0x38, FSP_CMD_TIMEOUT2);
+	ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
+
+	if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
+		goto out;
+
+	if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
+		ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
+	} else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
+		/* swapping is required */
+		ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
+	} else {
+		/* swapping isn't necessary */
+		ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
+	}
+
+	ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
+	rc = 0;
+
+ out:
+	ps2_end_command(ps2dev);
+	psmouse_dbg(psmouse,
+		    "WRITE PAGE REG: to 0x%02x (rc = %d)\n",
+		    reg_val, rc);
+	return rc;
+}
+
+static int fsp_get_version(struct psmouse *psmouse, int *version)
+{
+	if (fsp_reg_read(psmouse, FSP_REG_VERSION, version))
+		return -EIO;
+
+	return 0;
+}
+
+static int fsp_get_revision(struct psmouse *psmouse, int *rev)
+{
+	if (fsp_reg_read(psmouse, FSP_REG_REVISION, rev))
+		return -EIO;
+
+	return 0;
+}
+
+static int fsp_get_sn(struct psmouse *psmouse, int *sn)
+{
+	int v0, v1, v2;
+	int rc = -EIO;
+
+	/* production number since Cx is available at: 0x0b40 ~ 0x0b42 */
+	if (fsp_page_reg_write(psmouse, FSP_PAGE_0B))
+		goto out;
+	if (fsp_reg_read(psmouse, FSP_REG_SN0, &v0))
+		goto out;
+	if (fsp_reg_read(psmouse, FSP_REG_SN1, &v1))
+		goto out;
+	if (fsp_reg_read(psmouse, FSP_REG_SN2, &v2))
+		goto out;
+	*sn = (v0 << 16) | (v1 << 8) | v2;
+	rc = 0;
+out:
+	fsp_page_reg_write(psmouse, FSP_PAGE_DEFAULT);
+	return rc;
+}
+
+static int fsp_get_buttons(struct psmouse *psmouse, int *btn)
+{
+	static const int buttons[] = {
+		0x16, /* Left/Middle/Right/Forward/Backward & Scroll Up/Down */
+		0x06, /* Left/Middle/Right & Scroll Up/Down/Right/Left */
+		0x04, /* Left/Middle/Right & Scroll Up/Down */
+		0x02, /* Left/Middle/Right */
+	};
+	int val;
+
+	if (fsp_reg_read(psmouse, FSP_REG_TMOD_STATUS, &val) == -1)
+		return -EIO;
+
+	*btn = buttons[(val & 0x30) >> 4];
+	return 0;
+}
+
+/* Enable on-pad command tag output */
+static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
+{
+	int v, nv;
+	int res = 0;
+
+	if (fsp_reg_read(psmouse, FSP_REG_OPC_QDOWN, &v) == -1) {
+		psmouse_err(psmouse, "Unable get OPC state.\n");
+		return -EIO;
+	}
+
+	if (enable)
+		nv = v | FSP_BIT_EN_OPC_TAG;
+	else
+		nv = v & ~FSP_BIT_EN_OPC_TAG;
+
+	/* only write if necessary */
+	if (nv != v) {
+		fsp_reg_write_enable(psmouse, true);
+		res = fsp_reg_write(psmouse, FSP_REG_OPC_QDOWN, nv);
+		fsp_reg_write_enable(psmouse, false);
+	}
+
+	if (res != 0) {
+		psmouse_err(psmouse, "Unable to enable OPC tag.\n");
+		res = -EIO;
+	}
+
+	return res;
+}
+
+static int fsp_onpad_vscr(struct psmouse *psmouse, bool enable)
+{
+	struct fsp_data *pad = psmouse->private;
+	int val;
+
+	if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
+		return -EIO;
+
+	pad->vscroll = enable;
+
+	if (enable)
+		val |= (FSP_BIT_FIX_VSCR | FSP_BIT_ONPAD_ENABLE);
+	else
+		val &= ~FSP_BIT_FIX_VSCR;
+
+	if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
+		return -EIO;
+
+	return 0;
+}
+
+static int fsp_onpad_hscr(struct psmouse *psmouse, bool enable)
+{
+	struct fsp_data *pad = psmouse->private;
+	int val, v2;
+
+	if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
+		return -EIO;
+
+	if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &v2))
+		return -EIO;
+
+	pad->hscroll = enable;
+
+	if (enable) {
+		val |= (FSP_BIT_FIX_HSCR | FSP_BIT_ONPAD_ENABLE);
+		v2 |= FSP_BIT_EN_MSID6;
+	} else {
+		val &= ~FSP_BIT_FIX_HSCR;
+		v2 &= ~(FSP_BIT_EN_MSID6 | FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8);
+	}
+
+	if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
+		return -EIO;
+
+	/* reconfigure horizontal scrolling packet output */
+	if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, v2))
+		return -EIO;
+
+	return 0;
+}
+
+/*
+ * Write device specific initial parameters.
+ *
+ * ex: 0xab 0xcd - write oxcd into register 0xab
+ */
+static ssize_t fsp_attr_set_setreg(struct psmouse *psmouse, void *data,
+				   const char *buf, size_t count)
+{
+	unsigned int reg, val;
+	char *rest;
+	ssize_t retval;
+
+	reg = simple_strtoul(buf, &rest, 16);
+	if (rest == buf || *rest != ' ' || reg > 0xff)
+		return -EINVAL;
+
+	retval = kstrtouint(rest + 1, 16, &val);
+	if (retval)
+		return retval;
+
+	if (val > 0xff)
+		return -EINVAL;
+
+	if (fsp_reg_write_enable(psmouse, true))
+		return -EIO;
+
+	retval = fsp_reg_write(psmouse, reg, val) < 0 ? -EIO : count;
+
+	fsp_reg_write_enable(psmouse, false);
+
+	return retval;
+}
+
+PSMOUSE_DEFINE_WO_ATTR(setreg, S_IWUSR, NULL, fsp_attr_set_setreg);
+
+static ssize_t fsp_attr_show_getreg(struct psmouse *psmouse,
+					void *data, char *buf)
+{
+	struct fsp_data *pad = psmouse->private;
+
+	return sprintf(buf, "%02x%02x\n", pad->last_reg, pad->last_val);
+}
+
+/*
+ * Read a register from device.
+ *
+ * ex: 0xab -- read content from register 0xab
+ */
+static ssize_t fsp_attr_set_getreg(struct psmouse *psmouse, void *data,
+					const char *buf, size_t count)
+{
+	struct fsp_data *pad = psmouse->private;
+	unsigned int reg, val;
+	int err;
+
+	err = kstrtouint(buf, 16, &reg);
+	if (err)
+		return err;
+
+	if (reg > 0xff)
+		return -EINVAL;
+
+	if (fsp_reg_read(psmouse, reg, &val))
+		return -EIO;
+
+	pad->last_reg = reg;
+	pad->last_val = val;
+
+	return count;
+}
+
+PSMOUSE_DEFINE_ATTR(getreg, S_IWUSR | S_IRUGO, NULL,
+			fsp_attr_show_getreg, fsp_attr_set_getreg);
+
+static ssize_t fsp_attr_show_pagereg(struct psmouse *psmouse,
+					void *data, char *buf)
+{
+	int val = 0;
+
+	if (fsp_page_reg_read(psmouse, &val))
+		return -EIO;
+
+	return sprintf(buf, "%02x\n", val);
+}
+
+static ssize_t fsp_attr_set_pagereg(struct psmouse *psmouse, void *data,
+					const char *buf, size_t count)
+{
+	unsigned int val;
+	int err;
+
+	err = kstrtouint(buf, 16, &val);
+	if (err)
+		return err;
+
+	if (val > 0xff)
+		return -EINVAL;
+
+	if (fsp_page_reg_write(psmouse, val))
+		return -EIO;
+
+	return count;
+}
+
+PSMOUSE_DEFINE_ATTR(page, S_IWUSR | S_IRUGO, NULL,
+			fsp_attr_show_pagereg, fsp_attr_set_pagereg);
+
+static ssize_t fsp_attr_show_vscroll(struct psmouse *psmouse,
+					void *data, char *buf)
+{
+	struct fsp_data *pad = psmouse->private;
+
+	return sprintf(buf, "%d\n", pad->vscroll);
+}
+
+static ssize_t fsp_attr_set_vscroll(struct psmouse *psmouse, void *data,
+					const char *buf, size_t count)
+{
+	unsigned int val;
+	int err;
+
+	err = kstrtouint(buf, 10, &val);
+	if (err)
+		return err;
+
+	if (val > 1)
+		return -EINVAL;
+
+	fsp_onpad_vscr(psmouse, val);
+
+	return count;
+}
+
+PSMOUSE_DEFINE_ATTR(vscroll, S_IWUSR | S_IRUGO, NULL,
+			fsp_attr_show_vscroll, fsp_attr_set_vscroll);
+
+static ssize_t fsp_attr_show_hscroll(struct psmouse *psmouse,
+					void *data, char *buf)
+{
+	struct fsp_data *pad = psmouse->private;
+
+	return sprintf(buf, "%d\n", pad->hscroll);
+}
+
+static ssize_t fsp_attr_set_hscroll(struct psmouse *psmouse, void *data,
+					const char *buf, size_t count)
+{
+	unsigned int val;
+	int err;
+
+	err = kstrtouint(buf, 10, &val);
+	if (err)
+		return err;
+
+	if (val > 1)
+		return -EINVAL;
+
+	fsp_onpad_hscr(psmouse, val);
+
+	return count;
+}
+
+PSMOUSE_DEFINE_ATTR(hscroll, S_IWUSR | S_IRUGO, NULL,
+			fsp_attr_show_hscroll, fsp_attr_set_hscroll);
+
+static ssize_t fsp_attr_show_flags(struct psmouse *psmouse,
+					void *data, char *buf)
+{
+	struct fsp_data *pad = psmouse->private;
+
+	return sprintf(buf, "%c\n",
+			pad->flags & FSPDRV_FLAG_EN_OPC ? 'C' : 'c');
+}
+
+static ssize_t fsp_attr_set_flags(struct psmouse *psmouse, void *data,
+					const char *buf, size_t count)
+{
+	struct fsp_data *pad = psmouse->private;
+	size_t i;
+
+	for (i = 0; i < count; i++) {
+		switch (buf[i]) {
+		case 'C':
+			pad->flags |= FSPDRV_FLAG_EN_OPC;
+			break;
+		case 'c':
+			pad->flags &= ~FSPDRV_FLAG_EN_OPC;
+			break;
+		default:
+			return -EINVAL;
+		}
+	}
+	return count;
+}
+
+PSMOUSE_DEFINE_ATTR(flags, S_IWUSR | S_IRUGO, NULL,
+			fsp_attr_show_flags, fsp_attr_set_flags);
+
+static ssize_t fsp_attr_show_ver(struct psmouse *psmouse,
+					void *data, char *buf)
+{
+	return sprintf(buf, "Sentelic FSP kernel module %s\n", fsp_drv_ver);
+}
+
+PSMOUSE_DEFINE_RO_ATTR(ver, S_IRUGO, NULL, fsp_attr_show_ver);
+
+static struct attribute *fsp_attributes[] = {
+	&psmouse_attr_setreg.dattr.attr,
+	&psmouse_attr_getreg.dattr.attr,
+	&psmouse_attr_page.dattr.attr,
+	&psmouse_attr_vscroll.dattr.attr,
+	&psmouse_attr_hscroll.dattr.attr,
+	&psmouse_attr_flags.dattr.attr,
+	&psmouse_attr_ver.dattr.attr,
+	NULL
+};
+
+static struct attribute_group fsp_attribute_group = {
+	.attrs = fsp_attributes,
+};
+
+#ifdef	FSP_DEBUG
+static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
+{
+	static unsigned int ps2_packet_cnt;
+	static unsigned int ps2_last_second;
+	unsigned int jiffies_msec;
+	const char *packet_type = "UNKNOWN";
+	unsigned short abs_x = 0, abs_y = 0;
+
+	/* Interpret & dump the packet data. */
+	switch (packet[0] >> FSP_PKT_TYPE_SHIFT) {
+	case FSP_PKT_TYPE_ABS:
+		packet_type = "Absolute";
+		abs_x = GET_ABS_X(packet);
+		abs_y = GET_ABS_Y(packet);
+		break;
+	case FSP_PKT_TYPE_NORMAL:
+		packet_type = "Normal";
+		break;
+	case FSP_PKT_TYPE_NOTIFY:
+		packet_type = "Notify";
+		break;
+	case FSP_PKT_TYPE_NORMAL_OPC:
+		packet_type = "Normal-OPC";
+		break;
+	}
+
+	ps2_packet_cnt++;
+	jiffies_msec = jiffies_to_msecs(jiffies);
+	psmouse_dbg(psmouse,
+		    "%08dms %s packets: %02x, %02x, %02x, %02x; "
+		    "abs_x: %d, abs_y: %d\n",
+		    jiffies_msec, packet_type,
+		    packet[0], packet[1], packet[2], packet[3], abs_x, abs_y);
+
+	if (jiffies_msec - ps2_last_second > 1000) {
+		psmouse_dbg(psmouse, "PS/2 packets/sec = %d\n", ps2_packet_cnt);
+		ps2_packet_cnt = 0;
+		ps2_last_second = jiffies_msec;
+	}
+}
+#else
+static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
+{
+}
+#endif
+
+static void fsp_set_slot(struct input_dev *dev, int slot, bool active,
+			 unsigned int x, unsigned int y)
+{
+	input_mt_slot(dev, slot);
+	input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
+	if (active) {
+		input_report_abs(dev, ABS_MT_POSITION_X, x);
+		input_report_abs(dev, ABS_MT_POSITION_Y, y);
+	}
+}
+
+static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct fsp_data *ad = psmouse->private;
+	unsigned char *packet = psmouse->packet;
+	unsigned char button_status = 0, lscroll = 0, rscroll = 0;
+	unsigned short abs_x, abs_y, fgrs = 0;
+
+	if (psmouse->pktcnt < 4)
+		return PSMOUSE_GOOD_DATA;
+
+	/*
+	 * Full packet accumulated, process it
+	 */
+
+	fsp_packet_debug(psmouse, packet);
+
+	switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
+	case FSP_PKT_TYPE_ABS:
+
+		if ((packet[0] == 0x48 || packet[0] == 0x49) &&
+		    packet[1] == 0 && packet[2] == 0) {
+			/*
+			 * Ignore coordinate noise when finger leaving the
+			 * surface, otherwise cursor may jump to upper-left
+			 * corner.
+			 */
+			packet[3] &= 0xf0;
+		}
+
+		abs_x = GET_ABS_X(packet);
+		abs_y = GET_ABS_Y(packet);
+
+		if (packet[0] & FSP_PB0_MFMC) {
+			/*
+			 * MFMC packet: assume that there are two fingers on
+			 * pad
+			 */
+			fgrs = 2;
+
+			/* MFMC packet */
+			if (packet[0] & FSP_PB0_MFMC_FGR2) {
+				/* 2nd finger */
+				if (ad->last_mt_fgr == 2) {
+					/*
+					 * workaround for buggy firmware
+					 * which doesn't clear MFMC bit if
+					 * the 1st finger is up
+					 */
+					fgrs = 1;
+					fsp_set_slot(dev, 0, false, 0, 0);
+				}
+				ad->last_mt_fgr = 2;
+
+				fsp_set_slot(dev, 1, fgrs == 2, abs_x, abs_y);
+			} else {
+				/* 1st finger */
+				if (ad->last_mt_fgr == 1) {
+					/*
+					 * workaround for buggy firmware
+					 * which doesn't clear MFMC bit if
+					 * the 2nd finger is up
+					 */
+					fgrs = 1;
+					fsp_set_slot(dev, 1, false, 0, 0);
+				}
+				ad->last_mt_fgr = 1;
+				fsp_set_slot(dev, 0, fgrs != 0, abs_x, abs_y);
+			}
+		} else {
+			/* SFAC packet */
+			if ((packet[0] & (FSP_PB0_LBTN|FSP_PB0_PHY_BTN)) ==
+				FSP_PB0_LBTN) {
+				/* On-pad click in SFAC mode should be handled
+				 * by userspace.  On-pad clicks in MFMC mode
+				 * are real clickpad clicks, and not ignored.
+				 */
+				packet[0] &= ~FSP_PB0_LBTN;
+			}
+
+			/* no multi-finger information */
+			ad->last_mt_fgr = 0;
+
+			if (abs_x != 0 && abs_y != 0)
+				fgrs = 1;
+
+			fsp_set_slot(dev, 0, fgrs > 0, abs_x, abs_y);
+			fsp_set_slot(dev, 1, false, 0, 0);
+		}
+		if (fgrs == 1 || (fgrs == 2 && !(packet[0] & FSP_PB0_MFMC_FGR2))) {
+			input_report_abs(dev, ABS_X, abs_x);
+			input_report_abs(dev, ABS_Y, abs_y);
+		}
+		input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
+		input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+		input_report_key(dev, BTN_TOUCH, fgrs);
+		input_report_key(dev, BTN_TOOL_FINGER, fgrs == 1);
+		input_report_key(dev, BTN_TOOL_DOUBLETAP, fgrs == 2);
+		break;
+
+	case FSP_PKT_TYPE_NORMAL_OPC:
+		/* on-pad click, filter it if necessary */
+		if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
+			packet[0] &= ~FSP_PB0_LBTN;
+		fallthrough;
+
+	case FSP_PKT_TYPE_NORMAL:
+		/* normal packet */
+		/* special packet data translation from on-pad packets */
+		if (packet[3] != 0) {
+			if (packet[3] & BIT(0))
+				button_status |= 0x01;	/* wheel down */
+			if (packet[3] & BIT(1))
+				button_status |= 0x0f;	/* wheel up */
+			if (packet[3] & BIT(2))
+				button_status |= BIT(4);/* horizontal left */
+			if (packet[3] & BIT(3))
+				button_status |= BIT(5);/* horizontal right */
+			/* push back to packet queue */
+			if (button_status != 0)
+				packet[3] = button_status;
+			rscroll = (packet[3] >> 4) & 1;
+			lscroll = (packet[3] >> 5) & 1;
+		}
+		/*
+		 * Processing wheel up/down and extra button events
+		 */
+		input_report_rel(dev, REL_WHEEL,
+				 (int)(packet[3] & 8) - (int)(packet[3] & 7));
+		input_report_rel(dev, REL_HWHEEL, lscroll - rscroll);
+		input_report_key(dev, BTN_BACK, lscroll);
+		input_report_key(dev, BTN_FORWARD, rscroll);
+
+		/*
+		 * Standard PS/2 Mouse
+		 */
+		psmouse_report_standard_packet(dev, packet);
+		break;
+	}
+
+	input_sync(dev);
+
+	return PSMOUSE_FULL_PACKET;
+}
+
+static int fsp_activate_protocol(struct psmouse *psmouse)
+{
+	struct fsp_data *pad = psmouse->private;
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	unsigned char param[2];
+	int val;
+
+	/*
+	 * Standard procedure to enter FSP Intellimouse mode
+	 * (scrolling wheel, 4th and 5th buttons)
+	 */
+	param[0] = 200;
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+	param[0] = 200;
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+	param[0] =  80;
+	ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+
+	ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
+	if (param[0] != 0x04) {
+		psmouse_err(psmouse,
+			    "Unable to enable 4 bytes packet format.\n");
+		return -EIO;
+	}
+
+	if (pad->ver < FSP_VER_STL3888_C0) {
+		/* Preparing relative coordinates output for older hardware */
+		if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
+			psmouse_err(psmouse,
+				    "Unable to read SYSCTL5 register.\n");
+			return -EIO;
+		}
+
+		if (fsp_get_buttons(psmouse, &pad->buttons)) {
+			psmouse_err(psmouse,
+				    "Unable to retrieve number of buttons.\n");
+			return -EIO;
+		}
+
+		val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
+		/* Ensure we are not in absolute mode */
+		val &= ~FSP_BIT_EN_PKT_G0;
+		if (pad->buttons == 0x06) {
+			/* Left/Middle/Right & Scroll Up/Down/Right/Left */
+			val |= FSP_BIT_EN_MSID6;
+		}
+
+		if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
+			psmouse_err(psmouse,
+				    "Unable to set up required mode bits.\n");
+			return -EIO;
+		}
+
+		/*
+		 * Enable OPC tags such that driver can tell the difference
+		 * between on-pad and real button click
+		 */
+		if (fsp_opc_tag_enable(psmouse, true))
+			psmouse_warn(psmouse,
+				     "Failed to enable OPC tag mode.\n");
+		/* enable on-pad click by default */
+		pad->flags |= FSPDRV_FLAG_EN_OPC;
+
+		/* Enable on-pad vertical and horizontal scrolling */
+		fsp_onpad_vscr(psmouse, true);
+		fsp_onpad_hscr(psmouse, true);
+	} else {
+		/* Enable absolute coordinates output for Cx/Dx hardware */
+		if (fsp_reg_write(psmouse, FSP_REG_SWC1,
+				  FSP_BIT_SWC1_EN_ABS_1F |
+				  FSP_BIT_SWC1_EN_ABS_2F |
+				  FSP_BIT_SWC1_EN_FUP_OUT |
+				  FSP_BIT_SWC1_EN_ABS_CON)) {
+			psmouse_err(psmouse,
+				    "Unable to enable absolute coordinates output.\n");
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static int fsp_set_input_params(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct fsp_data *pad = psmouse->private;
+
+	if (pad->ver < FSP_VER_STL3888_C0) {
+		__set_bit(BTN_MIDDLE, dev->keybit);
+		__set_bit(BTN_BACK, dev->keybit);
+		__set_bit(BTN_FORWARD, dev->keybit);
+		__set_bit(REL_WHEEL, dev->relbit);
+		__set_bit(REL_HWHEEL, dev->relbit);
+	} else {
+		/*
+		 * Hardware prior to Cx performs much better in relative mode;
+		 * hence, only enable absolute coordinates output as well as
+		 * multi-touch output for the newer hardware.
+		 *
+		 * Maximum coordinates can be computed as:
+		 *
+		 *	number of scanlines * 64 - 57
+		 *
+		 * where number of X/Y scanline lines are 16/12.
+		 */
+		int abs_x = 967, abs_y = 711;
+
+		__set_bit(EV_ABS, dev->evbit);
+		__clear_bit(EV_REL, dev->evbit);
+		__set_bit(BTN_TOUCH, dev->keybit);
+		__set_bit(BTN_TOOL_FINGER, dev->keybit);
+		__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
+		__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
+
+		input_set_abs_params(dev, ABS_X, 0, abs_x, 0, 0);
+		input_set_abs_params(dev, ABS_Y, 0, abs_y, 0, 0);
+		input_mt_init_slots(dev, 2, 0);
+		input_set_abs_params(dev, ABS_MT_POSITION_X, 0, abs_x, 0, 0);
+		input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, abs_y, 0, 0);
+	}
+
+	return 0;
+}
+
+int fsp_detect(struct psmouse *psmouse, bool set_properties)
+{
+	int id;
+
+	if (fsp_reg_read(psmouse, FSP_REG_DEVICE_ID, &id))
+		return -EIO;
+
+	if (id != 0x01)
+		return -ENODEV;
+
+	if (set_properties) {
+		psmouse->vendor = "Sentelic";
+		psmouse->name = "FingerSensingPad";
+	}
+
+	return 0;
+}
+
+static void fsp_reset(struct psmouse *psmouse)
+{
+	fsp_opc_tag_enable(psmouse, false);
+	fsp_onpad_vscr(psmouse, false);
+	fsp_onpad_hscr(psmouse, false);
+}
+
+static void fsp_disconnect(struct psmouse *psmouse)
+{
+	sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
+			   &fsp_attribute_group);
+
+	fsp_reset(psmouse);
+	kfree(psmouse->private);
+}
+
+static int fsp_reconnect(struct psmouse *psmouse)
+{
+	int version;
+
+	if (fsp_detect(psmouse, 0))
+		return -ENODEV;
+
+	if (fsp_get_version(psmouse, &version))
+		return -ENODEV;
+
+	if (fsp_activate_protocol(psmouse))
+		return -EIO;
+
+	return 0;
+}
+
+int fsp_init(struct psmouse *psmouse)
+{
+	struct fsp_data *priv;
+	int ver, rev, sn = 0;
+	int error;
+
+	if (fsp_get_version(psmouse, &ver) ||
+	    fsp_get_revision(psmouse, &rev)) {
+		return -ENODEV;
+	}
+	if (ver >= FSP_VER_STL3888_C0) {
+		/* firmware information is only available since C0 */
+		fsp_get_sn(psmouse, &sn);
+	}
+
+	psmouse_info(psmouse,
+		     "Finger Sensing Pad, hw: %d.%d.%d, sn: %x, sw: %s\n",
+		     ver >> 4, ver & 0x0F, rev, sn, fsp_drv_ver);
+
+	psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->ver = ver;
+	priv->rev = rev;
+
+	psmouse->protocol_handler = fsp_process_byte;
+	psmouse->disconnect = fsp_disconnect;
+	psmouse->reconnect = fsp_reconnect;
+	psmouse->cleanup = fsp_reset;
+	psmouse->pktsize = 4;
+
+	error = fsp_activate_protocol(psmouse);
+	if (error)
+		goto err_out;
+
+	/* Set up various supported input event bits */
+	error = fsp_set_input_params(psmouse);
+	if (error)
+		goto err_out;
+
+	error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
+				   &fsp_attribute_group);
+	if (error) {
+		psmouse_err(psmouse,
+			    "Failed to create sysfs attributes (%d)", error);
+		goto err_out;
+	}
+
+	return 0;
+
+ err_out:
+	kfree(psmouse->private);
+	psmouse->private = NULL;
+	return error;
+}