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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/media/rc/streamzap.c | |
download | linux-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/media/rc/streamzap.c')
-rw-r--r-- | drivers/media/rc/streamzap.c | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/drivers/media/rc/streamzap.c b/drivers/media/rc/streamzap.c new file mode 100644 index 000000000..9b209e687 --- /dev/null +++ b/drivers/media/rc/streamzap.c @@ -0,0 +1,421 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Streamzap Remote Control driver + * + * Copyright (c) 2005 Christoph Bartelmus <lirc@bartelmus.de> + * Copyright (c) 2010 Jarod Wilson <jarod@wilsonet.com> + * + * This driver was based on the work of Greg Wickham and Adrian + * Dewhurst. It was substantially rewritten to support correct signal + * gaps and now maintains a delay buffer, which is used to present + * consistent timing behaviour to user space applications. Without the + * delay buffer an ugly hack would be required in lircd, which can + * cause sluggish signal decoding in certain situations. + * + * Ported to in-kernel ir-core interface by Jarod Wilson + * + * This driver is based on the USB skeleton driver packaged with the + * kernel; copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com) + */ + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/usb.h> +#include <linux/usb/input.h> +#include <media/rc-core.h> + +#define DRIVER_NAME "streamzap" +#define DRIVER_DESC "Streamzap Remote Control driver" + +#define USB_STREAMZAP_VENDOR_ID 0x0e9c +#define USB_STREAMZAP_PRODUCT_ID 0x0000 + +/* table of devices that work with this driver */ +static const struct usb_device_id streamzap_table[] = { + /* Streamzap Remote Control */ + { USB_DEVICE(USB_STREAMZAP_VENDOR_ID, USB_STREAMZAP_PRODUCT_ID) }, + /* Terminating entry */ + { } +}; + +MODULE_DEVICE_TABLE(usb, streamzap_table); + +#define SZ_PULSE_MASK 0xf0 +#define SZ_SPACE_MASK 0x0f +#define SZ_TIMEOUT 0xff +#define SZ_RESOLUTION 256 + +/* number of samples buffered */ +#define SZ_BUF_LEN 128 + +enum StreamzapDecoderState { + PulseSpace, + FullPulse, + FullSpace, + IgnorePulse +}; + +/* structure to hold our device specific stuff */ +struct streamzap_ir { + /* ir-core */ + struct rc_dev *rdev; + + /* core device info */ + struct device *dev; + + /* usb */ + struct urb *urb_in; + + /* buffer & dma */ + unsigned char *buf_in; + dma_addr_t dma_in; + unsigned int buf_in_len; + + /* track what state we're in */ + enum StreamzapDecoderState decoder_state; + + char phys[64]; +}; + + +/* local function prototypes */ +static int streamzap_probe(struct usb_interface *interface, + const struct usb_device_id *id); +static void streamzap_disconnect(struct usb_interface *interface); +static void streamzap_callback(struct urb *urb); +static int streamzap_suspend(struct usb_interface *intf, pm_message_t message); +static int streamzap_resume(struct usb_interface *intf); + +/* usb specific object needed to register this driver with the usb subsystem */ +static struct usb_driver streamzap_driver = { + .name = DRIVER_NAME, + .probe = streamzap_probe, + .disconnect = streamzap_disconnect, + .suspend = streamzap_suspend, + .resume = streamzap_resume, + .id_table = streamzap_table, +}; + +static void sz_push(struct streamzap_ir *sz, struct ir_raw_event rawir) +{ + dev_dbg(sz->dev, "Storing %s with duration %u us\n", + (rawir.pulse ? "pulse" : "space"), rawir.duration); + ir_raw_event_store_with_filter(sz->rdev, &rawir); +} + +static void sz_push_full_pulse(struct streamzap_ir *sz, + unsigned char value) +{ + struct ir_raw_event rawir = { + .pulse = true, + .duration = value * SZ_RESOLUTION + SZ_RESOLUTION / 2, + }; + + sz_push(sz, rawir); +} + +static void sz_push_half_pulse(struct streamzap_ir *sz, + unsigned char value) +{ + sz_push_full_pulse(sz, (value & SZ_PULSE_MASK) >> 4); +} + +static void sz_push_full_space(struct streamzap_ir *sz, + unsigned char value) +{ + struct ir_raw_event rawir = { + .pulse = false, + .duration = value * SZ_RESOLUTION + SZ_RESOLUTION / 2, + }; + + sz_push(sz, rawir); +} + +static void sz_push_half_space(struct streamzap_ir *sz, + unsigned long value) +{ + sz_push_full_space(sz, value & SZ_SPACE_MASK); +} + +/* + * streamzap_callback - usb IRQ handler callback + * + * This procedure is invoked on reception of data from + * the usb remote. + */ +static void streamzap_callback(struct urb *urb) +{ + struct streamzap_ir *sz; + unsigned int i; + int len; + + if (!urb) + return; + + sz = urb->context; + len = urb->actual_length; + + switch (urb->status) { + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* + * this urb is terminated, clean up. + * sz might already be invalid at this point + */ + dev_err(sz->dev, "urb terminated, status: %d\n", urb->status); + return; + default: + break; + } + + dev_dbg(sz->dev, "%s: received urb, len %d\n", __func__, len); + for (i = 0; i < len; i++) { + dev_dbg(sz->dev, "sz->buf_in[%d]: %x\n", + i, (unsigned char)sz->buf_in[i]); + switch (sz->decoder_state) { + case PulseSpace: + if ((sz->buf_in[i] & SZ_PULSE_MASK) == + SZ_PULSE_MASK) { + sz->decoder_state = FullPulse; + continue; + } else if ((sz->buf_in[i] & SZ_SPACE_MASK) + == SZ_SPACE_MASK) { + sz_push_half_pulse(sz, sz->buf_in[i]); + sz->decoder_state = FullSpace; + continue; + } else { + sz_push_half_pulse(sz, sz->buf_in[i]); + sz_push_half_space(sz, sz->buf_in[i]); + } + break; + case FullPulse: + sz_push_full_pulse(sz, sz->buf_in[i]); + sz->decoder_state = IgnorePulse; + break; + case FullSpace: + if (sz->buf_in[i] == SZ_TIMEOUT) { + struct ir_raw_event rawir = { + .pulse = false, + .duration = sz->rdev->timeout + }; + sz_push(sz, rawir); + } else { + sz_push_full_space(sz, sz->buf_in[i]); + } + sz->decoder_state = PulseSpace; + break; + case IgnorePulse: + if ((sz->buf_in[i] & SZ_SPACE_MASK) == + SZ_SPACE_MASK) { + sz->decoder_state = FullSpace; + continue; + } + sz_push_half_space(sz, sz->buf_in[i]); + sz->decoder_state = PulseSpace; + break; + } + } + + ir_raw_event_handle(sz->rdev); + usb_submit_urb(urb, GFP_ATOMIC); +} + +static struct rc_dev *streamzap_init_rc_dev(struct streamzap_ir *sz, + struct usb_device *usbdev) +{ + struct rc_dev *rdev; + struct device *dev = sz->dev; + int ret; + + rdev = rc_allocate_device(RC_DRIVER_IR_RAW); + if (!rdev) + goto out; + + usb_make_path(usbdev, sz->phys, sizeof(sz->phys)); + strlcat(sz->phys, "/input0", sizeof(sz->phys)); + + rdev->device_name = "Streamzap PC Remote Infrared Receiver"; + rdev->input_phys = sz->phys; + usb_to_input_id(usbdev, &rdev->input_id); + rdev->dev.parent = dev; + rdev->priv = sz; + rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; + rdev->driver_name = DRIVER_NAME; + rdev->map_name = RC_MAP_STREAMZAP; + rdev->rx_resolution = SZ_RESOLUTION; + + ret = rc_register_device(rdev); + if (ret < 0) { + dev_err(dev, "remote input device register failed\n"); + goto out; + } + + return rdev; + +out: + rc_free_device(rdev); + return NULL; +} + +/* + * streamzap_probe + * + * Called by usb-core to associated with a candidate device + * On any failure the return value is the ERROR + * On success return 0 + */ +static int streamzap_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device *usbdev = interface_to_usbdev(intf); + struct usb_endpoint_descriptor *endpoint; + struct usb_host_interface *iface_host; + struct streamzap_ir *sz = NULL; + int retval = -ENOMEM; + int pipe, maxp; + + /* Allocate space for device driver specific data */ + sz = kzalloc(sizeof(struct streamzap_ir), GFP_KERNEL); + if (!sz) + return -ENOMEM; + + /* Check to ensure endpoint information matches requirements */ + iface_host = intf->cur_altsetting; + + if (iface_host->desc.bNumEndpoints != 1) { + dev_err(&intf->dev, "%s: Unexpected desc.bNumEndpoints (%d)\n", + __func__, iface_host->desc.bNumEndpoints); + retval = -ENODEV; + goto free_sz; + } + + endpoint = &iface_host->endpoint[0].desc; + if (!usb_endpoint_dir_in(endpoint)) { + dev_err(&intf->dev, "%s: endpoint doesn't match input device 02%02x\n", + __func__, endpoint->bEndpointAddress); + retval = -ENODEV; + goto free_sz; + } + + if (!usb_endpoint_xfer_int(endpoint)) { + dev_err(&intf->dev, "%s: endpoint attributes don't match xfer 02%02x\n", + __func__, endpoint->bmAttributes); + retval = -ENODEV; + goto free_sz; + } + + pipe = usb_rcvintpipe(usbdev, endpoint->bEndpointAddress); + maxp = usb_maxpacket(usbdev, pipe); + + if (maxp == 0) { + dev_err(&intf->dev, "%s: endpoint Max Packet Size is 0!?!\n", + __func__); + retval = -ENODEV; + goto free_sz; + } + + /* Allocate the USB buffer and IRQ URB */ + sz->buf_in = usb_alloc_coherent(usbdev, maxp, GFP_ATOMIC, &sz->dma_in); + if (!sz->buf_in) + goto free_sz; + + sz->urb_in = usb_alloc_urb(0, GFP_KERNEL); + if (!sz->urb_in) + goto free_buf_in; + + sz->dev = &intf->dev; + sz->buf_in_len = maxp; + + sz->rdev = streamzap_init_rc_dev(sz, usbdev); + if (!sz->rdev) + goto rc_dev_fail; + + sz->decoder_state = PulseSpace; + /* FIXME: don't yet have a way to set this */ + sz->rdev->timeout = SZ_TIMEOUT * SZ_RESOLUTION; + #if 0 + /* not yet supported, depends on patches from maxim */ + /* see also: LIRC_GET_REC_RESOLUTION and LIRC_SET_REC_TIMEOUT */ + sz->min_timeout = SZ_TIMEOUT * SZ_RESOLUTION; + sz->max_timeout = SZ_TIMEOUT * SZ_RESOLUTION; + #endif + + /* Complete final initialisations */ + usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in, + maxp, streamzap_callback, sz, endpoint->bInterval); + sz->urb_in->transfer_dma = sz->dma_in; + sz->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + usb_set_intfdata(intf, sz); + + if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) + dev_err(sz->dev, "urb submit failed\n"); + + return 0; + +rc_dev_fail: + usb_free_urb(sz->urb_in); +free_buf_in: + usb_free_coherent(usbdev, maxp, sz->buf_in, sz->dma_in); +free_sz: + kfree(sz); + + return retval; +} + +/* + * streamzap_disconnect + * + * Called by the usb core when the device is removed from the system. + * + * This routine guarantees that the driver will not submit any more urbs + * by clearing dev->usbdev. It is also supposed to terminate any currently + * active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(), + * does not provide any way to do this. + */ +static void streamzap_disconnect(struct usb_interface *interface) +{ + struct streamzap_ir *sz = usb_get_intfdata(interface); + struct usb_device *usbdev = interface_to_usbdev(interface); + + usb_set_intfdata(interface, NULL); + + if (!sz) + return; + + rc_unregister_device(sz->rdev); + usb_kill_urb(sz->urb_in); + usb_free_urb(sz->urb_in); + usb_free_coherent(usbdev, sz->buf_in_len, sz->buf_in, sz->dma_in); + + kfree(sz); +} + +static int streamzap_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct streamzap_ir *sz = usb_get_intfdata(intf); + + usb_kill_urb(sz->urb_in); + + return 0; +} + +static int streamzap_resume(struct usb_interface *intf) +{ + struct streamzap_ir *sz = usb_get_intfdata(intf); + + if (usb_submit_urb(sz->urb_in, GFP_NOIO)) { + dev_err(sz->dev, "Error submitting urb\n"); + return -EIO; + } + + return 0; +} + +module_usb_driver(streamzap_driver); + +MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |