From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- sound/i2c/i2c.c | 326 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 326 insertions(+) create mode 100644 sound/i2c/i2c.c (limited to 'sound/i2c/i2c.c') diff --git a/sound/i2c/i2c.c b/sound/i2c/i2c.c new file mode 100644 index 000000000..847e3b6ca --- /dev/null +++ b/sound/i2c/i2c.c @@ -0,0 +1,326 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Generic i2c interface for ALSA + * + * (c) 1998 Gerd Knorr + * Modified for the ALSA driver by Jaroslav Kysela + */ + +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Jaroslav Kysela "); +MODULE_DESCRIPTION("Generic i2c interface for ALSA"); +MODULE_LICENSE("GPL"); + +static int snd_i2c_bit_sendbytes(struct snd_i2c_device *device, + unsigned char *bytes, int count); +static int snd_i2c_bit_readbytes(struct snd_i2c_device *device, + unsigned char *bytes, int count); +static int snd_i2c_bit_probeaddr(struct snd_i2c_bus *bus, + unsigned short addr); + +static const struct snd_i2c_ops snd_i2c_bit_ops = { + .sendbytes = snd_i2c_bit_sendbytes, + .readbytes = snd_i2c_bit_readbytes, + .probeaddr = snd_i2c_bit_probeaddr, +}; + +static int snd_i2c_bus_free(struct snd_i2c_bus *bus) +{ + struct snd_i2c_bus *slave; + struct snd_i2c_device *device; + + if (snd_BUG_ON(!bus)) + return -EINVAL; + while (!list_empty(&bus->devices)) { + device = snd_i2c_device(bus->devices.next); + snd_i2c_device_free(device); + } + if (bus->master) + list_del(&bus->buses); + else { + while (!list_empty(&bus->buses)) { + slave = snd_i2c_slave_bus(bus->buses.next); + snd_device_free(bus->card, slave); + } + } + if (bus->private_free) + bus->private_free(bus); + kfree(bus); + return 0; +} + +static int snd_i2c_bus_dev_free(struct snd_device *device) +{ + struct snd_i2c_bus *bus = device->device_data; + return snd_i2c_bus_free(bus); +} + +int snd_i2c_bus_create(struct snd_card *card, const char *name, + struct snd_i2c_bus *master, struct snd_i2c_bus **ri2c) +{ + struct snd_i2c_bus *bus; + int err; + static const struct snd_device_ops ops = { + .dev_free = snd_i2c_bus_dev_free, + }; + + *ri2c = NULL; + bus = kzalloc(sizeof(*bus), GFP_KERNEL); + if (bus == NULL) + return -ENOMEM; + mutex_init(&bus->lock_mutex); + INIT_LIST_HEAD(&bus->devices); + INIT_LIST_HEAD(&bus->buses); + bus->card = card; + bus->ops = &snd_i2c_bit_ops; + if (master) { + list_add_tail(&bus->buses, &master->buses); + bus->master = master; + } + strscpy(bus->name, name, sizeof(bus->name)); + err = snd_device_new(card, SNDRV_DEV_BUS, bus, &ops); + if (err < 0) { + snd_i2c_bus_free(bus); + return err; + } + *ri2c = bus; + return 0; +} + +EXPORT_SYMBOL(snd_i2c_bus_create); + +int snd_i2c_device_create(struct snd_i2c_bus *bus, const char *name, + unsigned char addr, struct snd_i2c_device **rdevice) +{ + struct snd_i2c_device *device; + + *rdevice = NULL; + if (snd_BUG_ON(!bus)) + return -EINVAL; + device = kzalloc(sizeof(*device), GFP_KERNEL); + if (device == NULL) + return -ENOMEM; + device->addr = addr; + strscpy(device->name, name, sizeof(device->name)); + list_add_tail(&device->list, &bus->devices); + device->bus = bus; + *rdevice = device; + return 0; +} + +EXPORT_SYMBOL(snd_i2c_device_create); + +int snd_i2c_device_free(struct snd_i2c_device *device) +{ + if (device->bus) + list_del(&device->list); + if (device->private_free) + device->private_free(device); + kfree(device); + return 0; +} + +EXPORT_SYMBOL(snd_i2c_device_free); + +int snd_i2c_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count) +{ + return device->bus->ops->sendbytes(device, bytes, count); +} + +EXPORT_SYMBOL(snd_i2c_sendbytes); + +int snd_i2c_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count) +{ + return device->bus->ops->readbytes(device, bytes, count); +} + +EXPORT_SYMBOL(snd_i2c_readbytes); + +int snd_i2c_probeaddr(struct snd_i2c_bus *bus, unsigned short addr) +{ + return bus->ops->probeaddr(bus, addr); +} + +EXPORT_SYMBOL(snd_i2c_probeaddr); + +/* + * bit-operations + */ + +static inline void snd_i2c_bit_hw_start(struct snd_i2c_bus *bus) +{ + if (bus->hw_ops.bit->start) + bus->hw_ops.bit->start(bus); +} + +static inline void snd_i2c_bit_hw_stop(struct snd_i2c_bus *bus) +{ + if (bus->hw_ops.bit->stop) + bus->hw_ops.bit->stop(bus); +} + +static void snd_i2c_bit_direction(struct snd_i2c_bus *bus, int clock, int data) +{ + if (bus->hw_ops.bit->direction) + bus->hw_ops.bit->direction(bus, clock, data); +} + +static void snd_i2c_bit_set(struct snd_i2c_bus *bus, int clock, int data) +{ + bus->hw_ops.bit->setlines(bus, clock, data); +} + +#if 0 +static int snd_i2c_bit_clock(struct snd_i2c_bus *bus) +{ + if (bus->hw_ops.bit->getclock) + return bus->hw_ops.bit->getclock(bus); + return -ENXIO; +} +#endif + +static int snd_i2c_bit_data(struct snd_i2c_bus *bus, int ack) +{ + return bus->hw_ops.bit->getdata(bus, ack); +} + +static void snd_i2c_bit_start(struct snd_i2c_bus *bus) +{ + snd_i2c_bit_hw_start(bus); + snd_i2c_bit_direction(bus, 1, 1); /* SCL - wr, SDA - wr */ + snd_i2c_bit_set(bus, 1, 1); + snd_i2c_bit_set(bus, 1, 0); + snd_i2c_bit_set(bus, 0, 0); +} + +static void snd_i2c_bit_stop(struct snd_i2c_bus *bus) +{ + snd_i2c_bit_set(bus, 0, 0); + snd_i2c_bit_set(bus, 1, 0); + snd_i2c_bit_set(bus, 1, 1); + snd_i2c_bit_hw_stop(bus); +} + +static void snd_i2c_bit_send(struct snd_i2c_bus *bus, int data) +{ + snd_i2c_bit_set(bus, 0, data); + snd_i2c_bit_set(bus, 1, data); + snd_i2c_bit_set(bus, 0, data); +} + +static int snd_i2c_bit_ack(struct snd_i2c_bus *bus) +{ + int ack; + + snd_i2c_bit_set(bus, 0, 1); + snd_i2c_bit_set(bus, 1, 1); + snd_i2c_bit_direction(bus, 1, 0); /* SCL - wr, SDA - rd */ + ack = snd_i2c_bit_data(bus, 1); + snd_i2c_bit_direction(bus, 1, 1); /* SCL - wr, SDA - wr */ + snd_i2c_bit_set(bus, 0, 1); + return ack ? -EIO : 0; +} + +static int snd_i2c_bit_sendbyte(struct snd_i2c_bus *bus, unsigned char data) +{ + int i, err; + + for (i = 7; i >= 0; i--) + snd_i2c_bit_send(bus, !!(data & (1 << i))); + err = snd_i2c_bit_ack(bus); + if (err < 0) + return err; + return 0; +} + +static int snd_i2c_bit_readbyte(struct snd_i2c_bus *bus, int last) +{ + int i; + unsigned char data = 0; + + snd_i2c_bit_set(bus, 0, 1); + snd_i2c_bit_direction(bus, 1, 0); /* SCL - wr, SDA - rd */ + for (i = 7; i >= 0; i--) { + snd_i2c_bit_set(bus, 1, 1); + if (snd_i2c_bit_data(bus, 0)) + data |= (1 << i); + snd_i2c_bit_set(bus, 0, 1); + } + snd_i2c_bit_direction(bus, 1, 1); /* SCL - wr, SDA - wr */ + snd_i2c_bit_send(bus, !!last); + return data; +} + +static int snd_i2c_bit_sendbytes(struct snd_i2c_device *device, + unsigned char *bytes, int count) +{ + struct snd_i2c_bus *bus = device->bus; + int err, res = 0; + + if (device->flags & SND_I2C_DEVICE_ADDRTEN) + return -EIO; /* not yet implemented */ + snd_i2c_bit_start(bus); + err = snd_i2c_bit_sendbyte(bus, device->addr << 1); + if (err < 0) { + snd_i2c_bit_hw_stop(bus); + return err; + } + while (count-- > 0) { + err = snd_i2c_bit_sendbyte(bus, *bytes++); + if (err < 0) { + snd_i2c_bit_hw_stop(bus); + return err; + } + res++; + } + snd_i2c_bit_stop(bus); + return res; +} + +static int snd_i2c_bit_readbytes(struct snd_i2c_device *device, + unsigned char *bytes, int count) +{ + struct snd_i2c_bus *bus = device->bus; + int err, res = 0; + + if (device->flags & SND_I2C_DEVICE_ADDRTEN) + return -EIO; /* not yet implemented */ + snd_i2c_bit_start(bus); + err = snd_i2c_bit_sendbyte(bus, (device->addr << 1) | 1); + if (err < 0) { + snd_i2c_bit_hw_stop(bus); + return err; + } + while (count-- > 0) { + err = snd_i2c_bit_readbyte(bus, count == 0); + if (err < 0) { + snd_i2c_bit_hw_stop(bus); + return err; + } + *bytes++ = (unsigned char)err; + res++; + } + snd_i2c_bit_stop(bus); + return res; +} + +static int snd_i2c_bit_probeaddr(struct snd_i2c_bus *bus, unsigned short addr) +{ + int err; + + if (addr & 0x8000) /* 10-bit address */ + return -EIO; /* not yet implemented */ + if (addr & 0x7f80) /* invalid address */ + return -EINVAL; + snd_i2c_bit_start(bus); + err = snd_i2c_bit_sendbyte(bus, addr << 1); + snd_i2c_bit_stop(bus); + return err; +} -- cgit v1.2.3