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, 647 insertions, 0 deletions

diff --git a/drivers/media/usb/gspca/stv06xx/stv06xx.c b/drivers/media/usb/gspca/stv06xx/stv06xx.c
new file mode 100644
index 000000000..d9bc2aacc
--- /dev/null
+++ b/drivers/media/usb/gspca/stv06xx/stv06xx.c
@@ -0,0 +1,647 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
+ *		      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
+ * Copyright (c) 2002, 2003 Tuukka Toivonen
+ * Copyright (c) 2008 Erik Andrén
+ *
+ * P/N 861037:      Sensor HDCS1000        ASIC STV0600
+ * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
+ * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
+ * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
+ * P/N 861075-0040: Sensor HDCS1000        ASIC
+ * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
+ * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/input.h>
+#include "stv06xx_sensor.h"
+
+MODULE_AUTHOR("Erik Andrén");
+MODULE_DESCRIPTION("STV06XX USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+static bool dump_bridge;
+static bool dump_sensor;
+
+int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
+{
+	int err;
+	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
+	struct usb_device *udev = sd->gspca_dev.dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+
+	u8 len = (i2c_data > 0xff) ? 2 : 1;
+
+	buf[0] = i2c_data & 0xff;
+	buf[1] = (i2c_data >> 8) & 0xff;
+
+	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			      0x04, 0x40, address, 0, buf, len,
+			      STV06XX_URB_MSG_TIMEOUT);
+
+	gspca_dbg(gspca_dev, D_CONF, "Written 0x%x to address 0x%x, status: %d\n",
+		  i2c_data, address, err);
+
+	return (err < 0) ? err : 0;
+}
+
+int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
+{
+	int err;
+	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
+	struct usb_device *udev = sd->gspca_dev.dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+
+	err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			      0x04, 0xc0, address, 0, buf, 1,
+			      STV06XX_URB_MSG_TIMEOUT);
+
+	*i2c_data = buf[0];
+
+	gspca_dbg(gspca_dev, D_CONF, "Reading 0x%x from address 0x%x, status %d\n",
+		  *i2c_data, address, err);
+
+	return (err < 0) ? err : 0;
+}
+
+/* Wraps the normal write sensor bytes / words functions for writing a
+   single value */
+int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
+{
+	if (sd->sensor->i2c_len == 2) {
+		u16 data[2] = { address, value };
+		return stv06xx_write_sensor_words(sd, data, 1);
+	} else {
+		u8 data[2] = { address, value };
+		return stv06xx_write_sensor_bytes(sd, data, 1);
+	}
+}
+
+static int stv06xx_write_sensor_finish(struct sd *sd)
+{
+	int err = 0;
+
+	if (sd->bridge == BRIDGE_STV610) {
+		struct usb_device *udev = sd->gspca_dev.dev;
+		__u8 *buf = sd->gspca_dev.usb_buf;
+
+		buf[0] = 0;
+		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+				      0x04, 0x40, 0x1704, 0, buf, 1,
+				      STV06XX_URB_MSG_TIMEOUT);
+	}
+
+	return (err < 0) ? err : 0;
+}
+
+int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
+{
+	int err, i, j;
+	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
+	struct usb_device *udev = sd->gspca_dev.dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+
+	gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
+		  len);
+	for (i = 0; i < len;) {
+		/* Build the command buffer */
+		memset(buf, 0, I2C_BUFFER_LENGTH);
+		for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
+			buf[j] = data[2*i];
+			buf[0x10 + j] = data[2*i+1];
+			gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%02x to reg 0x%02x\n",
+				  data[2*i+1], data[2*i]);
+		}
+		buf[0x20] = sd->sensor->i2c_addr;
+		buf[0x21] = j - 1; /* Number of commands to send - 1 */
+		buf[0x22] = I2C_WRITE_CMD;
+		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+				      0x04, 0x40, 0x0400, 0, buf,
+				      I2C_BUFFER_LENGTH,
+				      STV06XX_URB_MSG_TIMEOUT);
+		if (err < 0)
+			return err;
+	}
+	return stv06xx_write_sensor_finish(sd);
+}
+
+int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
+{
+	int err, i, j;
+	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
+	struct usb_device *udev = sd->gspca_dev.dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+
+	gspca_dbg(gspca_dev, D_CONF, "I2C: Command buffer contains %d entries\n",
+		  len);
+
+	for (i = 0; i < len;) {
+		/* Build the command buffer */
+		memset(buf, 0, I2C_BUFFER_LENGTH);
+		for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
+			buf[j] = data[2*i];
+			buf[0x10 + j * 2] = data[2*i+1];
+			buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
+			gspca_dbg(gspca_dev, D_CONF, "I2C: Writing 0x%04x to reg 0x%02x\n",
+				  data[2*i+1], data[2*i]);
+		}
+		buf[0x20] = sd->sensor->i2c_addr;
+		buf[0x21] = j - 1; /* Number of commands to send - 1 */
+		buf[0x22] = I2C_WRITE_CMD;
+		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+				0x04, 0x40, 0x0400, 0, buf,
+				I2C_BUFFER_LENGTH,
+				STV06XX_URB_MSG_TIMEOUT);
+		if (err < 0)
+			return err;
+	}
+	return stv06xx_write_sensor_finish(sd);
+}
+
+int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
+{
+	int err;
+	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
+	struct usb_device *udev = sd->gspca_dev.dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+
+	err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
+	if (err < 0)
+		return err;
+
+	/* Clear mem */
+	memset(buf, 0, I2C_BUFFER_LENGTH);
+
+	buf[0] = address;
+	buf[0x20] = sd->sensor->i2c_addr;
+	buf[0x21] = 0;
+
+	/* Read I2C register */
+	buf[0x22] = I2C_READ_CMD;
+
+	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			      0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
+			      STV06XX_URB_MSG_TIMEOUT);
+	if (err < 0) {
+		pr_err("I2C: Read error writing address: %d\n", err);
+		return err;
+	}
+
+	err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			      0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
+			      STV06XX_URB_MSG_TIMEOUT);
+	if (sd->sensor->i2c_len == 2)
+		*value = buf[0] | (buf[1] << 8);
+	else
+		*value = buf[0];
+
+	gspca_dbg(gspca_dev, D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d\n",
+		  *value, address, err);
+
+	return (err < 0) ? err : 0;
+}
+
+/* Dumps all bridge registers */
+static void stv06xx_dump_bridge(struct sd *sd)
+{
+	int i;
+	u8 data, buf;
+
+	pr_info("Dumping all stv06xx bridge registers\n");
+	for (i = 0x1400; i < 0x160f; i++) {
+		stv06xx_read_bridge(sd, i, &data);
+
+		pr_info("Read 0x%x from address 0x%x\n", data, i);
+	}
+
+	pr_info("Testing stv06xx bridge registers for writability\n");
+	for (i = 0x1400; i < 0x160f; i++) {
+		stv06xx_read_bridge(sd, i, &data);
+		buf = data;
+
+		stv06xx_write_bridge(sd, i, 0xff);
+		stv06xx_read_bridge(sd, i, &data);
+		if (data == 0xff)
+			pr_info("Register 0x%x is read/write\n", i);
+		else if (data != buf)
+			pr_info("Register 0x%x is read/write, but only partially\n",
+				i);
+		else
+			pr_info("Register 0x%x is read-only\n", i);
+
+		stv06xx_write_bridge(sd, i, buf);
+	}
+}
+
+/* this function is called at probe and resume time */
+static int stv06xx_init(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	int err;
+
+	gspca_dbg(gspca_dev, D_PROBE, "Initializing camera\n");
+
+	/* Let the usb init settle for a bit
+	   before performing the initialization */
+	msleep(250);
+
+	err = sd->sensor->init(sd);
+
+	if (dump_sensor && sd->sensor->dump)
+		sd->sensor->dump(sd);
+
+	return (err < 0) ? err : 0;
+}
+
+/* this function is called at probe time */
+static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	gspca_dbg(gspca_dev, D_PROBE, "Initializing controls\n");
+
+	gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
+	return sd->sensor->init_controls(sd);
+}
+
+/* Start the camera */
+static int stv06xx_start(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	struct usb_host_interface *alt;
+	struct usb_interface *intf;
+	int err, packet_size;
+
+	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
+	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
+	if (!alt) {
+		gspca_err(gspca_dev, "Couldn't get altsetting\n");
+		return -EIO;
+	}
+
+	if (alt->desc.bNumEndpoints < 1)
+		return -ENODEV;
+
+	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
+	err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
+	if (err < 0)
+		return err;
+
+	/* Prepare the sensor for start */
+	err = sd->sensor->start(sd);
+	if (err < 0)
+		goto out;
+
+	/* Start isochronous streaming */
+	err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
+
+out:
+	if (err < 0)
+		gspca_dbg(gspca_dev, D_STREAM, "Starting stream failed\n");
+	else
+		gspca_dbg(gspca_dev, D_STREAM, "Started streaming\n");
+
+	return (err < 0) ? err : 0;
+}
+
+static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
+{
+	struct usb_interface_cache *intfc;
+	struct usb_host_interface *alt;
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	intfc = gspca_dev->dev->actconfig->intf_cache[0];
+
+	if (intfc->num_altsetting < 2)
+		return -ENODEV;
+
+	alt = &intfc->altsetting[1];
+
+	if (alt->desc.bNumEndpoints < 1)
+		return -ENODEV;
+
+	/* Start isoc bandwidth "negotiation" at max isoc bandwidth */
+	alt->endpoint[0].desc.wMaxPacketSize =
+		cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
+
+	return 0;
+}
+
+static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
+{
+	int ret, packet_size, min_packet_size;
+	struct usb_host_interface *alt;
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	/*
+	 * Existence of altsetting and endpoint was verified in
+	 * stv06xx_isoc_init()
+	 */
+	alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
+	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
+	min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
+	if (packet_size <= min_packet_size)
+		return -EIO;
+
+	packet_size -= 100;
+	if (packet_size < min_packet_size)
+		packet_size = min_packet_size;
+	alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
+
+	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
+	if (ret < 0)
+		gspca_err(gspca_dev, "set alt 1 err %d\n", ret);
+
+	return ret;
+}
+
+static void stv06xx_stopN(struct gspca_dev *gspca_dev)
+{
+	int err;
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	/* stop ISO-streaming */
+	err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
+	if (err < 0)
+		goto out;
+
+	err = sd->sensor->stop(sd);
+
+out:
+	if (err < 0)
+		gspca_dbg(gspca_dev, D_STREAM, "Failed to stop stream\n");
+	else
+		gspca_dbg(gspca_dev, D_STREAM, "Stopped streaming\n");
+}
+
+/*
+ * Analyse an USB packet of the data stream and store it appropriately.
+ * Each packet contains an integral number of chunks. Each chunk has
+ * 2-bytes identification, followed by 2-bytes that describe the chunk
+ * length. Known/guessed chunk identifications are:
+ * 8001/8005/C001/C005 - Begin new frame
+ * 8002/8006/C002/C006 - End frame
+ * 0200/4200           - Contains actual image data, bayer or compressed
+ * 0005                - 11 bytes of unknown data
+ * 0100                - 2 bytes of unknown data
+ * The 0005 and 0100 chunks seem to appear only in compressed stream.
+ */
+static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
+			u8 *data,			/* isoc packet */
+			int len)			/* iso packet length */
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	gspca_dbg(gspca_dev, D_PACK, "Packet of length %d arrived\n", len);
+
+	/* A packet may contain several frames
+	   loop until the whole packet is reached */
+	while (len) {
+		int id, chunk_len;
+
+		if (len < 4) {
+			gspca_dbg(gspca_dev, D_PACK, "Packet is smaller than 4 bytes\n");
+			return;
+		}
+
+		/* Capture the id */
+		id = (data[0] << 8) | data[1];
+
+		/* Capture the chunk length */
+		chunk_len = (data[2] << 8) | data[3];
+		gspca_dbg(gspca_dev, D_PACK, "Chunk id: %x, length: %d\n",
+			  id, chunk_len);
+
+		data += 4;
+		len -= 4;
+
+		if (len < chunk_len) {
+			gspca_err(gspca_dev, "URB packet length is smaller than the specified chunk length\n");
+			gspca_dev->last_packet_type = DISCARD_PACKET;
+			return;
+		}
+
+		/* First byte seem to be 02=data 2nd byte is unknown??? */
+		if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
+			goto frame_data;
+
+		switch (id) {
+		case 0x0200:
+		case 0x4200:
+frame_data:
+			gspca_dbg(gspca_dev, D_PACK, "Frame data packet detected\n");
+
+			if (sd->to_skip) {
+				int skip = (sd->to_skip < chunk_len) ?
+					    sd->to_skip : chunk_len;
+				data += skip;
+				len -= skip;
+				chunk_len -= skip;
+				sd->to_skip -= skip;
+			}
+
+			gspca_frame_add(gspca_dev, INTER_PACKET,
+					data, chunk_len);
+			break;
+
+		case 0x8001:
+		case 0x8005:
+		case 0xc001:
+		case 0xc005:
+			gspca_dbg(gspca_dev, D_PACK, "Starting new frame\n");
+
+			/* Create a new frame, chunk length should be zero */
+			gspca_frame_add(gspca_dev, FIRST_PACKET,
+					NULL, 0);
+
+			if (sd->bridge == BRIDGE_ST6422)
+				sd->to_skip = gspca_dev->pixfmt.width * 4;
+
+			if (chunk_len)
+				gspca_err(gspca_dev, "Chunk length is non-zero on a SOF\n");
+			break;
+
+		case 0x8002:
+		case 0x8006:
+		case 0xc002:
+			gspca_dbg(gspca_dev, D_PACK, "End of frame detected\n");
+
+			/* Complete the last frame (if any) */
+			gspca_frame_add(gspca_dev, LAST_PACKET,
+					NULL, 0);
+
+			if (chunk_len)
+				gspca_err(gspca_dev, "Chunk length is non-zero on a EOF\n");
+			break;
+
+		case 0x0005:
+			gspca_dbg(gspca_dev, D_PACK, "Chunk 0x005 detected\n");
+			/* Unknown chunk with 11 bytes of data,
+			   occurs just before end of each frame
+			   in compressed mode */
+			break;
+
+		case 0x0100:
+			gspca_dbg(gspca_dev, D_PACK, "Chunk 0x0100 detected\n");
+			/* Unknown chunk with 2 bytes of data,
+			   occurs 2-3 times per USB interrupt */
+			break;
+		case 0x42ff:
+			gspca_dbg(gspca_dev, D_PACK, "Chunk 0x42ff detected\n");
+			/* Special chunk seen sometimes on the ST6422 */
+			break;
+		default:
+			gspca_dbg(gspca_dev, D_PACK, "Unknown chunk 0x%04x detected\n",
+				  id);
+			/* Unknown chunk */
+		}
+		data    += chunk_len;
+		len     -= chunk_len;
+	}
+}
+
+#if IS_ENABLED(CONFIG_INPUT)
+static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
+			u8 *data,		/* interrupt packet data */
+			int len)		/* interrupt packet length */
+{
+	int ret = -EINVAL;
+
+	if (len == 1 && (data[0] == 0x80 || data[0] == 0x10)) {
+		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
+		input_sync(gspca_dev->input_dev);
+		ret = 0;
+	}
+
+	if (len == 1 && (data[0] == 0x88 || data[0] == 0x11)) {
+		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
+		input_sync(gspca_dev->input_dev);
+		ret = 0;
+	}
+
+	return ret;
+}
+#endif
+
+static int stv06xx_config(struct gspca_dev *gspca_dev,
+			  const struct usb_device_id *id);
+
+static void stv06xx_probe_error(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *)gspca_dev;
+
+	kfree(sd->sensor_priv);
+	sd->sensor_priv = NULL;
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+	.name = MODULE_NAME,
+	.config = stv06xx_config,
+	.init = stv06xx_init,
+	.init_controls = stv06xx_init_controls,
+	.probe_error = stv06xx_probe_error,
+	.start = stv06xx_start,
+	.stopN = stv06xx_stopN,
+	.pkt_scan = stv06xx_pkt_scan,
+	.isoc_init = stv06xx_isoc_init,
+	.isoc_nego = stv06xx_isoc_nego,
+#if IS_ENABLED(CONFIG_INPUT)
+	.int_pkt_scan = sd_int_pkt_scan,
+#endif
+};
+
+/* This function is called at probe time */
+static int stv06xx_config(struct gspca_dev *gspca_dev,
+			  const struct usb_device_id *id)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	gspca_dbg(gspca_dev, D_PROBE, "Configuring camera\n");
+
+	sd->bridge = id->driver_info;
+	gspca_dev->sd_desc = &sd_desc;
+
+	if (dump_bridge)
+		stv06xx_dump_bridge(sd);
+
+	sd->sensor = &stv06xx_sensor_st6422;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	sd->sensor = &stv06xx_sensor_vv6410;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	sd->sensor = &stv06xx_sensor_hdcs1x00;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	sd->sensor = &stv06xx_sensor_hdcs1020;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	sd->sensor = &stv06xx_sensor_pb0100;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	sd->sensor = NULL;
+	return -ENODEV;
+}
+
+
+
+/* -- module initialisation -- */
+static const struct usb_device_id device_table[] = {
+	{USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },	/* QuickCam Express */
+	{USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },	/* LEGO cam / QuickCam Web */
+	{USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },	/* Dexxa WebCam USB */
+	{USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },	/* QuickCam Messenger */
+	{USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },	/* QuickCam Communicate */
+	{USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },	/* QuickCam Messenger (new) */
+	{}
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* -- device connect -- */
+static int sd_probe(struct usb_interface *intf,
+			const struct usb_device_id *id)
+{
+	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
+			       THIS_MODULE);
+}
+
+static void sd_disconnect(struct usb_interface *intf)
+{
+	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
+	struct sd *sd = (struct sd *) gspca_dev;
+	void *priv = sd->sensor_priv;
+	gspca_dbg(gspca_dev, D_PROBE, "Disconnecting the stv06xx device\n");
+
+	sd->sensor = NULL;
+	gspca_disconnect(intf);
+	kfree(priv);
+}
+
+static struct usb_driver sd_driver = {
+	.name = MODULE_NAME,
+	.id_table = device_table,
+	.probe = sd_probe,
+	.disconnect = sd_disconnect,
+#ifdef CONFIG_PM
+	.suspend = gspca_suspend,
+	.resume = gspca_resume,
+	.reset_resume = gspca_resume,
+#endif
+};
+
+module_usb_driver(sd_driver);
+
+module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
+
+module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");