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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/iio/gyro/itg3200_core.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
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(). ...
Diffstat (limited to 'drivers/iio/gyro/itg3200_core.c')
-rw-r--r--drivers/iio/gyro/itg3200_core.c416
1 files changed, 416 insertions, 0 deletions
diff --git a/drivers/iio/gyro/itg3200_core.c b/drivers/iio/gyro/itg3200_core.c
new file mode 100644
index 000000000..ceacd863d
--- /dev/null
+++ b/drivers/iio/gyro/itg3200_core.c
@@ -0,0 +1,416 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * itg3200_core.c -- support InvenSense ITG3200
+ * Digital 3-Axis Gyroscope driver
+ *
+ * Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de>
+ * Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
+ * Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de>
+ *
+ * TODO:
+ * - Support digital low pass filter
+ * - Support power management
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/buffer.h>
+
+#include <linux/iio/gyro/itg3200.h>
+
+
+int itg3200_write_reg_8(struct iio_dev *indio_dev,
+ u8 reg_address, u8 val)
+{
+ struct itg3200 *st = iio_priv(indio_dev);
+
+ return i2c_smbus_write_byte_data(st->i2c, 0x80 | reg_address, val);
+}
+
+int itg3200_read_reg_8(struct iio_dev *indio_dev,
+ u8 reg_address, u8 *val)
+{
+ struct itg3200 *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(st->i2c, reg_address);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return 0;
+}
+
+static int itg3200_read_reg_s16(struct iio_dev *indio_dev, u8 lower_reg_address,
+ int *val)
+{
+ struct itg3200 *st = iio_priv(indio_dev);
+ struct i2c_client *client = st->i2c;
+ int ret;
+ s16 out;
+
+ struct i2c_msg msg[2] = {
+ {
+ .addr = client->addr,
+ .flags = client->flags,
+ .len = 1,
+ .buf = (char *)&lower_reg_address,
+ },
+ {
+ .addr = client->addr,
+ .flags = client->flags | I2C_M_RD,
+ .len = 2,
+ .buf = (char *)&out,
+ },
+ };
+
+ lower_reg_address |= 0x80;
+ ret = i2c_transfer(client->adapter, msg, 2);
+ be16_to_cpus(&out);
+ *val = out;
+
+ return (ret == 2) ? 0 : ret;
+}
+
+static int itg3200_read_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ int *val, int *val2, long info)
+{
+ int ret = 0;
+ u8 reg;
+ u8 regval;
+
+ switch (info) {
+ case IIO_CHAN_INFO_RAW:
+ reg = (u8)chan->address;
+ ret = itg3200_read_reg_s16(indio_dev, reg, val);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ if (chan->type == IIO_TEMP)
+ *val2 = 1000000000/280;
+ else
+ *val2 = 1214142; /* (1 / 14,375) * (PI / 180) */
+ return IIO_VAL_INT_PLUS_NANO;
+ case IIO_CHAN_INFO_OFFSET:
+ /* Only the temperature channel has an offset */
+ *val = 23000;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &regval);
+ if (ret)
+ return ret;
+
+ *val = (regval & ITG3200_DLPF_CFG_MASK) ? 1000 : 8000;
+
+ ret = itg3200_read_reg_8(indio_dev,
+ ITG3200_REG_SAMPLE_RATE_DIV,
+ &regval);
+ if (ret)
+ return ret;
+
+ *val /= regval + 1;
+ return IIO_VAL_INT;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int itg3200_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct itg3200 *st = iio_priv(indio_dev);
+ int ret;
+ u8 t;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ if (val == 0 || val2 != 0)
+ return -EINVAL;
+
+ mutex_lock(&st->lock);
+
+ ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &t);
+ if (ret) {
+ mutex_unlock(&st->lock);
+ return ret;
+ }
+ t = ((t & ITG3200_DLPF_CFG_MASK) ? 1000u : 8000u) / val - 1;
+
+ ret = itg3200_write_reg_8(indio_dev,
+ ITG3200_REG_SAMPLE_RATE_DIV,
+ t);
+
+ mutex_unlock(&st->lock);
+ return ret;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+/*
+ * Reset device and internal registers to the power-up-default settings
+ * Use the gyro clock as reference, as suggested by the datasheet
+ */
+static int itg3200_reset(struct iio_dev *indio_dev)
+{
+ struct itg3200 *st = iio_priv(indio_dev);
+ int ret;
+
+ dev_dbg(&st->i2c->dev, "reset device");
+
+ ret = itg3200_write_reg_8(indio_dev,
+ ITG3200_REG_POWER_MANAGEMENT,
+ ITG3200_RESET);
+ if (ret) {
+ dev_err(&st->i2c->dev, "error resetting device");
+ goto error_ret;
+ }
+
+ /* Wait for PLL (1ms according to datasheet) */
+ udelay(1500);
+
+ ret = itg3200_write_reg_8(indio_dev,
+ ITG3200_REG_IRQ_CONFIG,
+ ITG3200_IRQ_ACTIVE_HIGH |
+ ITG3200_IRQ_PUSH_PULL |
+ ITG3200_IRQ_LATCH_50US_PULSE |
+ ITG3200_IRQ_LATCH_CLEAR_ANY);
+
+ if (ret)
+ dev_err(&st->i2c->dev, "error init device");
+
+error_ret:
+ return ret;
+}
+
+/* itg3200_enable_full_scale() - Disables the digital low pass filter */
+static int itg3200_enable_full_scale(struct iio_dev *indio_dev)
+{
+ u8 val;
+ int ret;
+
+ ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_DLPF, &val);
+ if (ret)
+ goto err_ret;
+
+ val |= ITG3200_DLPF_FS_SEL_2000;
+ return itg3200_write_reg_8(indio_dev, ITG3200_REG_DLPF, val);
+
+err_ret:
+ return ret;
+}
+
+static int itg3200_initial_setup(struct iio_dev *indio_dev)
+{
+ struct itg3200 *st = iio_priv(indio_dev);
+ int ret;
+ u8 val;
+
+ ret = itg3200_reset(indio_dev);
+ if (ret)
+ goto err_ret;
+
+ ret = itg3200_read_reg_8(indio_dev, ITG3200_REG_ADDRESS, &val);
+ if (ret)
+ goto err_ret;
+
+ if (((val >> 1) & 0x3f) != 0x34) {
+ dev_err(&st->i2c->dev, "invalid reg value 0x%02x", val);
+ ret = -ENXIO;
+ goto err_ret;
+ }
+
+ ret = itg3200_enable_full_scale(indio_dev);
+err_ret:
+ return ret;
+}
+
+static const struct iio_mount_matrix *
+itg3200_get_mount_matrix(const struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct itg3200 *data = iio_priv(indio_dev);
+
+ return &data->orientation;
+}
+
+static const struct iio_chan_spec_ext_info itg3200_ext_info[] = {
+ IIO_MOUNT_MATRIX(IIO_SHARED_BY_DIR, itg3200_get_mount_matrix),
+ { }
+};
+
+#define ITG3200_ST \
+ { .sign = 's', .realbits = 16, .storagebits = 16, .endianness = IIO_BE }
+
+#define ITG3200_GYRO_CHAN(_mod) { \
+ .type = IIO_ANGL_VEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_ ## _mod, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .address = ITG3200_REG_GYRO_ ## _mod ## OUT_H, \
+ .scan_index = ITG3200_SCAN_GYRO_ ## _mod, \
+ .scan_type = ITG3200_ST, \
+ .ext_info = itg3200_ext_info, \
+}
+
+static const struct iio_chan_spec itg3200_channels[] = {
+ {
+ .type = IIO_TEMP,
+ .channel2 = IIO_NO_MOD,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .address = ITG3200_REG_TEMP_OUT_H,
+ .scan_index = ITG3200_SCAN_TEMP,
+ .scan_type = ITG3200_ST,
+ },
+ ITG3200_GYRO_CHAN(X),
+ ITG3200_GYRO_CHAN(Y),
+ ITG3200_GYRO_CHAN(Z),
+ IIO_CHAN_SOFT_TIMESTAMP(ITG3200_SCAN_ELEMENTS),
+};
+
+static const struct iio_info itg3200_info = {
+ .read_raw = &itg3200_read_raw,
+ .write_raw = &itg3200_write_raw,
+};
+
+static const unsigned long itg3200_available_scan_masks[] = { 0xffffffff, 0x0 };
+
+static int itg3200_probe(struct i2c_client *client)
+{
+ int ret;
+ struct itg3200 *st;
+ struct iio_dev *indio_dev;
+
+ dev_dbg(&client->dev, "probe I2C dev with IRQ %i", client->irq);
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+
+ ret = iio_read_mount_matrix(&client->dev, &st->orientation);
+ if (ret)
+ return ret;
+
+ i2c_set_clientdata(client, indio_dev);
+ st->i2c = client;
+
+ indio_dev->name = client->dev.driver->name;
+ indio_dev->channels = itg3200_channels;
+ indio_dev->num_channels = ARRAY_SIZE(itg3200_channels);
+ indio_dev->available_scan_masks = itg3200_available_scan_masks;
+ indio_dev->info = &itg3200_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = itg3200_buffer_configure(indio_dev);
+ if (ret)
+ return ret;
+
+ if (client->irq) {
+ ret = itg3200_probe_trigger(indio_dev);
+ if (ret)
+ goto error_unconfigure_buffer;
+ }
+
+ ret = itg3200_initial_setup(indio_dev);
+ if (ret)
+ goto error_remove_trigger;
+
+ mutex_init(&st->lock);
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_remove_trigger;
+
+ return 0;
+
+error_remove_trigger:
+ if (client->irq)
+ itg3200_remove_trigger(indio_dev);
+error_unconfigure_buffer:
+ itg3200_buffer_unconfigure(indio_dev);
+ return ret;
+}
+
+static void itg3200_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+
+ if (client->irq)
+ itg3200_remove_trigger(indio_dev);
+
+ itg3200_buffer_unconfigure(indio_dev);
+}
+
+static int itg3200_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct itg3200 *st = iio_priv(indio_dev);
+
+ dev_dbg(&st->i2c->dev, "suspend device");
+
+ return itg3200_write_reg_8(indio_dev, ITG3200_REG_POWER_MANAGEMENT,
+ ITG3200_SLEEP);
+}
+
+static int itg3200_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+ return itg3200_initial_setup(indio_dev);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(itg3200_pm_ops, itg3200_suspend,
+ itg3200_resume);
+
+static const struct i2c_device_id itg3200_id[] = {
+ { "itg3200", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, itg3200_id);
+
+static const struct of_device_id itg3200_of_match[] = {
+ { .compatible = "invensense,itg3200" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, itg3200_of_match);
+
+static struct i2c_driver itg3200_driver = {
+ .driver = {
+ .name = "itg3200",
+ .of_match_table = itg3200_of_match,
+ .pm = pm_sleep_ptr(&itg3200_pm_ops),
+ },
+ .id_table = itg3200_id,
+ .probe_new = itg3200_probe,
+ .remove = itg3200_remove,
+};
+
+module_i2c_driver(itg3200_driver);
+
+MODULE_AUTHOR("Christian Strobel <christian.strobel@iis.fraunhofer.de>");
+MODULE_DESCRIPTION("ITG3200 Gyroscope I2C driver");
+MODULE_LICENSE("GPL v2");