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(). ... --- drivers/video/fbdev/via/via_i2c.c | 281 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 281 insertions(+) create mode 100644 drivers/video/fbdev/via/via_i2c.c (limited to 'drivers/video/fbdev/via/via_i2c.c') diff --git a/drivers/video/fbdev/via/via_i2c.c b/drivers/video/fbdev/via/via_i2c.c new file mode 100644 index 000000000..c7e63ab47 --- /dev/null +++ b/drivers/video/fbdev/via/via_i2c.c @@ -0,0 +1,281 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved. + * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved. + + */ + +#include +#include +#include +#include +#include +#include + +/* + * There can only be one set of these, so there's no point in having + * them be dynamically allocated... + */ +#define VIAFB_NUM_I2C 5 +static struct via_i2c_stuff via_i2c_par[VIAFB_NUM_I2C]; +static struct viafb_dev *i2c_vdev; /* Passed in from core */ + +static void via_i2c_setscl(void *data, int state) +{ + u8 val; + struct via_port_cfg *adap_data = data; + unsigned long flags; + + spin_lock_irqsave(&i2c_vdev->reg_lock, flags); + val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0; + if (state) + val |= 0x20; + else + val &= ~0x20; + switch (adap_data->type) { + case VIA_PORT_I2C: + val |= 0x01; + break; + case VIA_PORT_GPIO: + val |= 0x82; + break; + default: + printk(KERN_ERR "viafb_i2c: specify wrong i2c type.\n"); + } + via_write_reg(adap_data->io_port, adap_data->ioport_index, val); + spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags); +} + +static int via_i2c_getscl(void *data) +{ + struct via_port_cfg *adap_data = data; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&i2c_vdev->reg_lock, flags); + if (adap_data->type == VIA_PORT_GPIO) + via_write_reg_mask(adap_data->io_port, adap_data->ioport_index, + 0, 0x80); + if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08) + ret = 1; + spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags); + return ret; +} + +static int via_i2c_getsda(void *data) +{ + struct via_port_cfg *adap_data = data; + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&i2c_vdev->reg_lock, flags); + if (adap_data->type == VIA_PORT_GPIO) + via_write_reg_mask(adap_data->io_port, adap_data->ioport_index, + 0, 0x40); + if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04) + ret = 1; + spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags); + return ret; +} + +static void via_i2c_setsda(void *data, int state) +{ + u8 val; + struct via_port_cfg *adap_data = data; + unsigned long flags; + + spin_lock_irqsave(&i2c_vdev->reg_lock, flags); + val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0; + if (state) + val |= 0x10; + else + val &= ~0x10; + switch (adap_data->type) { + case VIA_PORT_I2C: + val |= 0x01; + break; + case VIA_PORT_GPIO: + val |= 0x42; + break; + default: + printk(KERN_ERR "viafb_i2c: specify wrong i2c type.\n"); + } + via_write_reg(adap_data->io_port, adap_data->ioport_index, val); + spin_unlock_irqrestore(&i2c_vdev->reg_lock, flags); +} + +int viafb_i2c_readbyte(u8 adap, u8 slave_addr, u8 index, u8 *pdata) +{ + int ret; + u8 mm1[] = {0x00}; + struct i2c_msg msgs[2]; + + if (!via_i2c_par[adap].is_active) + return -ENODEV; + *pdata = 0; + msgs[0].flags = 0; + msgs[1].flags = I2C_M_RD; + msgs[0].addr = msgs[1].addr = slave_addr / 2; + mm1[0] = index; + msgs[0].len = 1; msgs[1].len = 1; + msgs[0].buf = mm1; msgs[1].buf = pdata; + ret = i2c_transfer(&via_i2c_par[adap].adapter, msgs, 2); + if (ret == 2) + ret = 0; + else if (ret >= 0) + ret = -EIO; + + return ret; +} + +int viafb_i2c_writebyte(u8 adap, u8 slave_addr, u8 index, u8 data) +{ + int ret; + u8 msg[2] = { index, data }; + struct i2c_msg msgs; + + if (!via_i2c_par[adap].is_active) + return -ENODEV; + msgs.flags = 0; + msgs.addr = slave_addr / 2; + msgs.len = 2; + msgs.buf = msg; + ret = i2c_transfer(&via_i2c_par[adap].adapter, &msgs, 1); + if (ret == 1) + ret = 0; + else if (ret >= 0) + ret = -EIO; + + return ret; +} + +int viafb_i2c_readbytes(u8 adap, u8 slave_addr, u8 index, u8 *buff, int buff_len) +{ + int ret; + u8 mm1[] = {0x00}; + struct i2c_msg msgs[2]; + + if (!via_i2c_par[adap].is_active) + return -ENODEV; + msgs[0].flags = 0; + msgs[1].flags = I2C_M_RD; + msgs[0].addr = msgs[1].addr = slave_addr / 2; + mm1[0] = index; + msgs[0].len = 1; msgs[1].len = buff_len; + msgs[0].buf = mm1; msgs[1].buf = buff; + ret = i2c_transfer(&via_i2c_par[adap].adapter, msgs, 2); + if (ret == 2) + ret = 0; + else if (ret >= 0) + ret = -EIO; + + return ret; +} + +/* + * Allow other viafb subdevices to look up a specific adapter + * by port name. + */ +struct i2c_adapter *viafb_find_i2c_adapter(enum viafb_i2c_adap which) +{ + struct via_i2c_stuff *stuff = &via_i2c_par[which]; + + return &stuff->adapter; +} +EXPORT_SYMBOL_GPL(viafb_find_i2c_adapter); + + +static int create_i2c_bus(struct i2c_adapter *adapter, + struct i2c_algo_bit_data *algo, + struct via_port_cfg *adap_cfg, + struct pci_dev *pdev) +{ + algo->setsda = via_i2c_setsda; + algo->setscl = via_i2c_setscl; + algo->getsda = via_i2c_getsda; + algo->getscl = via_i2c_getscl; + algo->udelay = 10; + algo->timeout = 2; + algo->data = adap_cfg; + + sprintf(adapter->name, "viafb i2c io_port idx 0x%02x", + adap_cfg->ioport_index); + adapter->owner = THIS_MODULE; + adapter->class = I2C_CLASS_DDC; + adapter->algo_data = algo; + if (pdev) + adapter->dev.parent = &pdev->dev; + else + adapter->dev.parent = NULL; + /* i2c_set_adapdata(adapter, adap_cfg); */ + + /* Raise SCL and SDA */ + via_i2c_setsda(adap_cfg, 1); + via_i2c_setscl(adap_cfg, 1); + udelay(20); + + return i2c_bit_add_bus(adapter); +} + +static int viafb_i2c_probe(struct platform_device *platdev) +{ + int i, ret; + struct via_port_cfg *configs; + + i2c_vdev = platdev->dev.platform_data; + configs = i2c_vdev->port_cfg; + + for (i = 0; i < VIAFB_NUM_PORTS; i++) { + struct via_port_cfg *adap_cfg = configs++; + struct via_i2c_stuff *i2c_stuff = &via_i2c_par[i]; + + i2c_stuff->is_active = 0; + if (adap_cfg->type == 0 || adap_cfg->mode != VIA_MODE_I2C) + continue; + ret = create_i2c_bus(&i2c_stuff->adapter, + &i2c_stuff->algo, adap_cfg, + NULL); /* FIXME: PCIDEV */ + if (ret < 0) { + printk(KERN_ERR "viafb: cannot create i2c bus %u:%d\n", + i, ret); + continue; /* Still try to make the rest */ + } + i2c_stuff->is_active = 1; + } + + return 0; +} + +static int viafb_i2c_remove(struct platform_device *platdev) +{ + int i; + + for (i = 0; i < VIAFB_NUM_PORTS; i++) { + struct via_i2c_stuff *i2c_stuff = &via_i2c_par[i]; + /* + * Only remove those entries in the array that we've + * actually used (and thus initialized algo_data) + */ + if (i2c_stuff->is_active) + i2c_del_adapter(&i2c_stuff->adapter); + } + return 0; +} + +static struct platform_driver via_i2c_driver = { + .driver = { + .name = "viafb-i2c", + }, + .probe = viafb_i2c_probe, + .remove = viafb_i2c_remove, +}; + +int viafb_i2c_init(void) +{ + return platform_driver_register(&via_i2c_driver); +} + +void viafb_i2c_exit(void) +{ + platform_driver_unregister(&via_i2c_driver); +} -- cgit v1.2.3