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/gpu/drm/sun4i/sun4i_hdmi_i2c.c | 317 +++++++++++++++++++++++++++++++++ 1 file changed, 317 insertions(+) create mode 100644 drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c (limited to 'drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c') diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c new file mode 100644 index 000000000..c7d7e9fff --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c @@ -0,0 +1,317 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2016 Maxime Ripard + * Copyright (C) 2017 Jonathan Liu + */ + +#include +#include +#include + +#include "sun4i_hdmi.h" + +#define SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK ( \ + SUN4I_HDMI_DDC_INT_STATUS_ILLEGAL_FIFO_OPERATION | \ + SUN4I_HDMI_DDC_INT_STATUS_DDC_RX_FIFO_UNDERFLOW | \ + SUN4I_HDMI_DDC_INT_STATUS_DDC_TX_FIFO_OVERFLOW | \ + SUN4I_HDMI_DDC_INT_STATUS_ARBITRATION_ERROR | \ + SUN4I_HDMI_DDC_INT_STATUS_ACK_ERROR | \ + SUN4I_HDMI_DDC_INT_STATUS_BUS_ERROR \ +) + +/* FIFO request bit is set when FIFO level is above RX_THRESHOLD during read */ +#define RX_THRESHOLD SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MAX + +static int fifo_transfer(struct sun4i_hdmi *hdmi, u8 *buf, int len, bool read) +{ + /* + * 1 byte takes 9 clock cycles (8 bits + 1 ACK) = 90 us for 100 kHz + * clock. As clock rate is fixed, just round it up to 100 us. + */ + const unsigned long byte_time_ns = 100; + const u32 mask = SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK | + SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST | + SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE; + u32 reg; + /* + * If threshold is inclusive, then the FIFO may only have + * RX_THRESHOLD number of bytes, instead of RX_THRESHOLD + 1. + */ + int read_len = RX_THRESHOLD + + (hdmi->variant->ddc_fifo_thres_incl ? 0 : 1); + + /* + * Limit transfer length by FIFO threshold or FIFO size. + * For TX the threshold is for an empty FIFO. + */ + len = min_t(int, len, read ? read_len : SUN4I_HDMI_DDC_FIFO_SIZE); + + /* Wait until error, FIFO request bit set or transfer complete */ + if (regmap_field_read_poll_timeout(hdmi->field_ddc_int_status, reg, + reg & mask, len * byte_time_ns, + 100000)) + return -ETIMEDOUT; + + if (reg & SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK) + return -EIO; + + if (read) + ioread8_rep(hdmi->base + hdmi->variant->ddc_fifo_reg, buf, len); + else + iowrite8_rep(hdmi->base + hdmi->variant->ddc_fifo_reg, buf, len); + + /* Clear FIFO request bit by forcing a write to that bit */ + regmap_field_force_write(hdmi->field_ddc_int_status, + SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST); + + return len; +} + +static int xfer_msg(struct sun4i_hdmi *hdmi, struct i2c_msg *msg) +{ + int i, len; + u32 reg; + + /* Set FIFO direction */ + if (hdmi->variant->ddc_fifo_has_dir) { + reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); + reg &= ~SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK; + reg |= (msg->flags & I2C_M_RD) ? + SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ : + SUN4I_HDMI_DDC_CTRL_FIFO_DIR_WRITE; + writel(reg, hdmi->base + SUN4I_HDMI_DDC_CTRL_REG); + } + + /* Clear address register (not cleared by soft reset) */ + regmap_field_write(hdmi->field_ddc_addr_reg, 0); + + /* Set I2C address */ + regmap_field_write(hdmi->field_ddc_slave_addr, msg->addr); + + /* + * Set FIFO RX/TX thresholds and clear FIFO + * + * If threshold is inclusive, we can set the TX threshold to + * 0 instead of 1. + */ + regmap_field_write(hdmi->field_ddc_fifo_tx_thres, + hdmi->variant->ddc_fifo_thres_incl ? 0 : 1); + regmap_field_write(hdmi->field_ddc_fifo_rx_thres, RX_THRESHOLD); + regmap_field_write(hdmi->field_ddc_fifo_clear, 1); + if (regmap_field_read_poll_timeout(hdmi->field_ddc_fifo_clear, + reg, !reg, 100, 2000)) + return -EIO; + + /* Set transfer length */ + regmap_field_write(hdmi->field_ddc_byte_count, msg->len); + + /* Set command */ + regmap_field_write(hdmi->field_ddc_cmd, + msg->flags & I2C_M_RD ? + SUN4I_HDMI_DDC_CMD_IMPLICIT_READ : + SUN4I_HDMI_DDC_CMD_IMPLICIT_WRITE); + + /* Clear interrupt status bits by forcing a write */ + regmap_field_force_write(hdmi->field_ddc_int_status, + SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK | + SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST | + SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE); + + /* Start command */ + regmap_field_write(hdmi->field_ddc_start, 1); + + /* Transfer bytes */ + for (i = 0; i < msg->len; i += len) { + len = fifo_transfer(hdmi, msg->buf + i, msg->len - i, + msg->flags & I2C_M_RD); + if (len <= 0) + return len; + } + + /* Wait for command to finish */ + if (regmap_field_read_poll_timeout(hdmi->field_ddc_start, + reg, !reg, 100, 100000)) + return -EIO; + + /* Check for errors */ + regmap_field_read(hdmi->field_ddc_int_status, ®); + if ((reg & SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK) || + !(reg & SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE)) { + return -EIO; + } + + return 0; +} + +static int sun4i_hdmi_i2c_xfer(struct i2c_adapter *adap, + struct i2c_msg *msgs, int num) +{ + struct sun4i_hdmi *hdmi = i2c_get_adapdata(adap); + u32 reg; + int err, i, ret = num; + + for (i = 0; i < num; i++) { + if (!msgs[i].len) + return -EINVAL; + if (msgs[i].len > SUN4I_HDMI_DDC_BYTE_COUNT_MAX) + return -EINVAL; + } + + /* DDC clock needs to be enabled for the module to work */ + clk_prepare_enable(hdmi->ddc_clk); + clk_set_rate(hdmi->ddc_clk, 100000); + + /* Reset I2C controller */ + regmap_field_write(hdmi->field_ddc_en, 1); + regmap_field_write(hdmi->field_ddc_reset, 1); + if (regmap_field_read_poll_timeout(hdmi->field_ddc_reset, + reg, !reg, 100, 2000)) { + clk_disable_unprepare(hdmi->ddc_clk); + return -EIO; + } + + regmap_field_write(hdmi->field_ddc_sck_en, 1); + regmap_field_write(hdmi->field_ddc_sda_en, 1); + + for (i = 0; i < num; i++) { + err = xfer_msg(hdmi, &msgs[i]); + if (err) { + ret = err; + break; + } + } + + clk_disable_unprepare(hdmi->ddc_clk); + return ret; +} + +static u32 sun4i_hdmi_i2c_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm sun4i_hdmi_i2c_algorithm = { + .master_xfer = sun4i_hdmi_i2c_xfer, + .functionality = sun4i_hdmi_i2c_func, +}; + +static int sun4i_hdmi_init_regmap_fields(struct sun4i_hdmi *hdmi) +{ + hdmi->field_ddc_en = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_en); + if (IS_ERR(hdmi->field_ddc_en)) + return PTR_ERR(hdmi->field_ddc_en); + + hdmi->field_ddc_start = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_start); + if (IS_ERR(hdmi->field_ddc_start)) + return PTR_ERR(hdmi->field_ddc_start); + + hdmi->field_ddc_reset = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_reset); + if (IS_ERR(hdmi->field_ddc_reset)) + return PTR_ERR(hdmi->field_ddc_reset); + + hdmi->field_ddc_addr_reg = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_addr_reg); + if (IS_ERR(hdmi->field_ddc_addr_reg)) + return PTR_ERR(hdmi->field_ddc_addr_reg); + + hdmi->field_ddc_slave_addr = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_slave_addr); + if (IS_ERR(hdmi->field_ddc_slave_addr)) + return PTR_ERR(hdmi->field_ddc_slave_addr); + + hdmi->field_ddc_int_mask = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_int_mask); + if (IS_ERR(hdmi->field_ddc_int_mask)) + return PTR_ERR(hdmi->field_ddc_int_mask); + + hdmi->field_ddc_int_status = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_int_status); + if (IS_ERR(hdmi->field_ddc_int_status)) + return PTR_ERR(hdmi->field_ddc_int_status); + + hdmi->field_ddc_fifo_clear = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_fifo_clear); + if (IS_ERR(hdmi->field_ddc_fifo_clear)) + return PTR_ERR(hdmi->field_ddc_fifo_clear); + + hdmi->field_ddc_fifo_rx_thres = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_fifo_rx_thres); + if (IS_ERR(hdmi->field_ddc_fifo_rx_thres)) + return PTR_ERR(hdmi->field_ddc_fifo_rx_thres); + + hdmi->field_ddc_fifo_tx_thres = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_fifo_tx_thres); + if (IS_ERR(hdmi->field_ddc_fifo_tx_thres)) + return PTR_ERR(hdmi->field_ddc_fifo_tx_thres); + + hdmi->field_ddc_byte_count = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_byte_count); + if (IS_ERR(hdmi->field_ddc_byte_count)) + return PTR_ERR(hdmi->field_ddc_byte_count); + + hdmi->field_ddc_cmd = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_cmd); + if (IS_ERR(hdmi->field_ddc_cmd)) + return PTR_ERR(hdmi->field_ddc_cmd); + + hdmi->field_ddc_sda_en = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_sda_en); + if (IS_ERR(hdmi->field_ddc_sda_en)) + return PTR_ERR(hdmi->field_ddc_sda_en); + + hdmi->field_ddc_sck_en = + devm_regmap_field_alloc(hdmi->dev, hdmi->regmap, + hdmi->variant->field_ddc_sck_en); + if (IS_ERR(hdmi->field_ddc_sck_en)) + return PTR_ERR(hdmi->field_ddc_sck_en); + + return 0; +} + +int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi) +{ + struct i2c_adapter *adap; + int ret = 0; + + ret = sun4i_ddc_create(hdmi, hdmi->ddc_parent_clk); + if (ret) + return ret; + + ret = sun4i_hdmi_init_regmap_fields(hdmi); + if (ret) + return ret; + + adap = devm_kzalloc(dev, sizeof(*adap), GFP_KERNEL); + if (!adap) + return -ENOMEM; + + adap->owner = THIS_MODULE; + adap->class = I2C_CLASS_DDC; + adap->algo = &sun4i_hdmi_i2c_algorithm; + strlcpy(adap->name, "sun4i_hdmi_i2c adapter", sizeof(adap->name)); + i2c_set_adapdata(adap, hdmi); + + ret = i2c_add_adapter(adap); + if (ret) + return ret; + + hdmi->i2c = adap; + + return ret; +} -- cgit v1.2.3