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/media/cec/platform/s5p/Makefile | 3 + drivers/media/cec/platform/s5p/exynos_hdmi_cec.h | 34 +++ .../media/cec/platform/s5p/exynos_hdmi_cecctrl.c | 206 ++++++++++++++ drivers/media/cec/platform/s5p/regs-cec.h | 93 +++++++ drivers/media/cec/platform/s5p/s5p_cec.c | 310 +++++++++++++++++++++ drivers/media/cec/platform/s5p/s5p_cec.h | 76 +++++ 6 files changed, 722 insertions(+) create mode 100644 drivers/media/cec/platform/s5p/Makefile create mode 100644 drivers/media/cec/platform/s5p/exynos_hdmi_cec.h create mode 100644 drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c create mode 100644 drivers/media/cec/platform/s5p/regs-cec.h create mode 100644 drivers/media/cec/platform/s5p/s5p_cec.c create mode 100644 drivers/media/cec/platform/s5p/s5p_cec.h (limited to 'drivers/media/cec/platform/s5p') diff --git a/drivers/media/cec/platform/s5p/Makefile b/drivers/media/cec/platform/s5p/Makefile new file mode 100644 index 000000000..92bf7b855 --- /dev/null +++ b/drivers/media/cec/platform/s5p/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_CEC_SAMSUNG_S5P) += s5p-cec.o +s5p-cec-y += s5p_cec.o exynos_hdmi_cecctrl.o diff --git a/drivers/media/cec/platform/s5p/exynos_hdmi_cec.h b/drivers/media/cec/platform/s5p/exynos_hdmi_cec.h new file mode 100644 index 000000000..325db8c43 --- /dev/null +++ b/drivers/media/cec/platform/s5p/exynos_hdmi_cec.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* drivers/media/platform/s5p-cec/exynos_hdmi_cec.h + * + * Copyright (c) 2010, 2014 Samsung Electronics + * http://www.samsung.com/ + * + * Header file for interface of Samsung Exynos hdmi cec hardware + */ + +#ifndef _EXYNOS_HDMI_CEC_H_ +#define _EXYNOS_HDMI_CEC_H_ __FILE__ + +#include +#include "s5p_cec.h" + +void s5p_cec_set_divider(struct s5p_cec_dev *cec); +void s5p_cec_enable_rx(struct s5p_cec_dev *cec); +void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_reset(struct s5p_cec_dev *cec); +void s5p_cec_tx_reset(struct s5p_cec_dev *cec); +void s5p_cec_rx_reset(struct s5p_cec_dev *cec); +void s5p_cec_threshold(struct s5p_cec_dev *cec); +void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data, + size_t count, u8 retries); +void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr); +u32 s5p_cec_get_status(struct s5p_cec_dev *cec); +void s5p_clr_pending_tx(struct s5p_cec_dev *cec); +void s5p_clr_pending_rx(struct s5p_cec_dev *cec); +void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer); + +#endif /* _EXYNOS_HDMI_CEC_H_ */ diff --git a/drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c b/drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c new file mode 100644 index 000000000..eb981ebce --- /dev/null +++ b/drivers/media/cec/platform/s5p/exynos_hdmi_cecctrl.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c + * + * Copyright (c) 2009, 2014 Samsung Electronics + * http://www.samsung.com/ + * + * cec ftn file for Samsung TVOUT driver + */ + +#include +#include + +#include "exynos_hdmi_cec.h" +#include "regs-cec.h" + +#define S5P_HDMI_FIN 24000000 +#define CEC_DIV_RATIO 320000 + +#define CEC_MESSAGE_BROADCAST_MASK 0x0F +#define CEC_MESSAGE_BROADCAST 0x0F +#define CEC_FILTER_THRESHOLD 0x15 + +void s5p_cec_set_divider(struct s5p_cec_dev *cec) +{ + u32 div_ratio, div_val; + unsigned int reg; + + div_ratio = S5P_HDMI_FIN / CEC_DIV_RATIO - 1; + + if (regmap_read(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, ®)) { + dev_err(cec->dev, "failed to read phy control\n"); + return; + } + + reg = (reg & ~(0x3FF << 16)) | (div_ratio << 16); + + if (regmap_write(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, reg)) { + dev_err(cec->dev, "failed to write phy control\n"); + return; + } + + div_val = CEC_DIV_RATIO * 0.00005 - 1; + + writeb(0x0, cec->reg + S5P_CEC_DIVISOR_3); + writeb(0x0, cec->reg + S5P_CEC_DIVISOR_2); + writeb(0x0, cec->reg + S5P_CEC_DIVISOR_1); + writeb(div_val, cec->reg + S5P_CEC_DIVISOR_0); +} + +void s5p_cec_enable_rx(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_RX_CTRL); + reg |= S5P_CEC_RX_CTRL_ENABLE; + writeb(reg, cec->reg + S5P_CEC_RX_CTRL); +} + +void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg |= S5P_CEC_IRQ_RX_DONE; + reg |= S5P_CEC_IRQ_RX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); +} + +void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg &= ~S5P_CEC_IRQ_RX_DONE; + reg &= ~S5P_CEC_IRQ_RX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); +} + +void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg |= S5P_CEC_IRQ_TX_DONE; + reg |= S5P_CEC_IRQ_TX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); +} + +void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg &= ~S5P_CEC_IRQ_TX_DONE; + reg &= ~S5P_CEC_IRQ_TX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); +} + +void s5p_cec_reset(struct s5p_cec_dev *cec) +{ + u8 reg; + + writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL); + writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL); + + reg = readb(cec->reg + 0xc4); + reg &= ~0x1; + writeb(reg, cec->reg + 0xc4); +} + +void s5p_cec_tx_reset(struct s5p_cec_dev *cec) +{ + writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL); +} + +void s5p_cec_rx_reset(struct s5p_cec_dev *cec) +{ + u8 reg; + + writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL); + + reg = readb(cec->reg + 0xc4); + reg &= ~0x1; + writeb(reg, cec->reg + 0xc4); +} + +void s5p_cec_threshold(struct s5p_cec_dev *cec) +{ + writeb(CEC_FILTER_THRESHOLD, cec->reg + S5P_CEC_RX_FILTER_TH); + writeb(0, cec->reg + S5P_CEC_RX_FILTER_CTRL); +} + +void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data, + size_t count, u8 retries) +{ + int i = 0; + u8 reg; + + while (i < count) { + writeb(data[i], cec->reg + (S5P_CEC_TX_BUFF0 + (i * 4))); + i++; + } + + writeb(count, cec->reg + S5P_CEC_TX_BYTES); + reg = readb(cec->reg + S5P_CEC_TX_CTRL); + reg |= S5P_CEC_TX_CTRL_START; + reg &= ~0x70; + reg |= retries << 4; + + if ((data[0] & CEC_MESSAGE_BROADCAST_MASK) == CEC_MESSAGE_BROADCAST) { + dev_dbg(cec->dev, "Broadcast"); + reg |= S5P_CEC_TX_CTRL_BCAST; + } else { + dev_dbg(cec->dev, "No Broadcast"); + reg &= ~S5P_CEC_TX_CTRL_BCAST; + } + + writeb(reg, cec->reg + S5P_CEC_TX_CTRL); + dev_dbg(cec->dev, "cec-tx: cec count (%zu): %*ph", count, + (int)count, data); +} + +void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr) +{ + writeb(addr & 0x0F, cec->reg + S5P_CEC_LOGIC_ADDR); +} + +u32 s5p_cec_get_status(struct s5p_cec_dev *cec) +{ + u32 status = 0; + + status = readb(cec->reg + S5P_CEC_STATUS_0) & 0xf; + status |= (readb(cec->reg + S5P_CEC_TX_STAT1) & 0xf) << 4; + status |= readb(cec->reg + S5P_CEC_STATUS_1) << 8; + status |= readb(cec->reg + S5P_CEC_STATUS_2) << 16; + status |= readb(cec->reg + S5P_CEC_STATUS_3) << 24; + + dev_dbg(cec->dev, "status = 0x%x!\n", status); + + return status; +} + +void s5p_clr_pending_tx(struct s5p_cec_dev *cec) +{ + writeb(S5P_CEC_IRQ_TX_DONE | S5P_CEC_IRQ_TX_ERROR, + cec->reg + S5P_CEC_IRQ_CLEAR); +} + +void s5p_clr_pending_rx(struct s5p_cec_dev *cec) +{ + writeb(S5P_CEC_IRQ_RX_DONE | S5P_CEC_IRQ_RX_ERROR, + cec->reg + S5P_CEC_IRQ_CLEAR); +} + +void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer) +{ + u32 i = 0; + char debug[40]; + + while (i < size) { + buffer[i] = readb(cec->reg + S5P_CEC_RX_BUFF0 + (i * 4)); + sprintf(debug + i * 2, "%02x ", buffer[i]); + i++; + } + dev_dbg(cec->dev, "cec-rx: cec size(%d): %s", size, debug); +} diff --git a/drivers/media/cec/platform/s5p/regs-cec.h b/drivers/media/cec/platform/s5p/regs-cec.h new file mode 100644 index 000000000..447f71702 --- /dev/null +++ b/drivers/media/cec/platform/s5p/regs-cec.h @@ -0,0 +1,93 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* drivers/media/platform/s5p-cec/regs-cec.h + * + * Copyright (c) 2010 Samsung Electronics + * http://www.samsung.com/ + * + * register header file for Samsung TVOUT driver + */ + +#ifndef __EXYNOS_REGS__H +#define __EXYNOS_REGS__H + +/* + * Register part + */ +#define S5P_CEC_STATUS_0 (0x0000) +#define S5P_CEC_STATUS_1 (0x0004) +#define S5P_CEC_STATUS_2 (0x0008) +#define S5P_CEC_STATUS_3 (0x000C) +#define S5P_CEC_IRQ_MASK (0x0010) +#define S5P_CEC_IRQ_CLEAR (0x0014) +#define S5P_CEC_LOGIC_ADDR (0x0020) +#define S5P_CEC_DIVISOR_0 (0x0030) +#define S5P_CEC_DIVISOR_1 (0x0034) +#define S5P_CEC_DIVISOR_2 (0x0038) +#define S5P_CEC_DIVISOR_3 (0x003C) + +#define S5P_CEC_TX_CTRL (0x0040) +#define S5P_CEC_TX_BYTES (0x0044) +#define S5P_CEC_TX_STAT0 (0x0060) +#define S5P_CEC_TX_STAT1 (0x0064) +#define S5P_CEC_TX_BUFF0 (0x0080) +#define S5P_CEC_TX_BUFF1 (0x0084) +#define S5P_CEC_TX_BUFF2 (0x0088) +#define S5P_CEC_TX_BUFF3 (0x008C) +#define S5P_CEC_TX_BUFF4 (0x0090) +#define S5P_CEC_TX_BUFF5 (0x0094) +#define S5P_CEC_TX_BUFF6 (0x0098) +#define S5P_CEC_TX_BUFF7 (0x009C) +#define S5P_CEC_TX_BUFF8 (0x00A0) +#define S5P_CEC_TX_BUFF9 (0x00A4) +#define S5P_CEC_TX_BUFF10 (0x00A8) +#define S5P_CEC_TX_BUFF11 (0x00AC) +#define S5P_CEC_TX_BUFF12 (0x00B0) +#define S5P_CEC_TX_BUFF13 (0x00B4) +#define S5P_CEC_TX_BUFF14 (0x00B8) +#define S5P_CEC_TX_BUFF15 (0x00BC) + +#define S5P_CEC_RX_CTRL (0x00C0) +#define S5P_CEC_RX_STAT0 (0x00E0) +#define S5P_CEC_RX_STAT1 (0x00E4) +#define S5P_CEC_RX_BUFF0 (0x0100) +#define S5P_CEC_RX_BUFF1 (0x0104) +#define S5P_CEC_RX_BUFF2 (0x0108) +#define S5P_CEC_RX_BUFF3 (0x010C) +#define S5P_CEC_RX_BUFF4 (0x0110) +#define S5P_CEC_RX_BUFF5 (0x0114) +#define S5P_CEC_RX_BUFF6 (0x0118) +#define S5P_CEC_RX_BUFF7 (0x011C) +#define S5P_CEC_RX_BUFF8 (0x0120) +#define S5P_CEC_RX_BUFF9 (0x0124) +#define S5P_CEC_RX_BUFF10 (0x0128) +#define S5P_CEC_RX_BUFF11 (0x012C) +#define S5P_CEC_RX_BUFF12 (0x0130) +#define S5P_CEC_RX_BUFF13 (0x0134) +#define S5P_CEC_RX_BUFF14 (0x0138) +#define S5P_CEC_RX_BUFF15 (0x013C) + +#define S5P_CEC_RX_FILTER_CTRL (0x0180) +#define S5P_CEC_RX_FILTER_TH (0x0184) + +/* + * Bit definition part + */ +#define S5P_CEC_IRQ_TX_DONE (1<<0) +#define S5P_CEC_IRQ_TX_ERROR (1<<1) +#define S5P_CEC_IRQ_RX_DONE (1<<4) +#define S5P_CEC_IRQ_RX_ERROR (1<<5) + +#define S5P_CEC_TX_CTRL_START (1<<0) +#define S5P_CEC_TX_CTRL_BCAST (1<<1) +#define S5P_CEC_TX_CTRL_RETRY (0x04<<4) +#define S5P_CEC_TX_CTRL_RESET (1<<7) + +#define S5P_CEC_RX_CTRL_ENABLE (1<<0) +#define S5P_CEC_RX_CTRL_RESET (1<<7) + +#define S5P_CEC_LOGIC_ADDR_MASK (0xF) + +/* PMU Registers for PHY */ +#define EXYNOS_HDMI_PHY_CONTROL 0x700 + +#endif /* __EXYNOS_REGS__H */ diff --git a/drivers/media/cec/platform/s5p/s5p_cec.c b/drivers/media/cec/platform/s5p/s5p_cec.c new file mode 100644 index 000000000..0a30e7acd --- /dev/null +++ b/drivers/media/cec/platform/s5p/s5p_cec.c @@ -0,0 +1,310 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* drivers/media/platform/s5p-cec/s5p_cec.c + * + * Samsung S5P CEC driver + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + * + * This driver is based on the "cec interface driver for exynos soc" by + * SangPil Moon. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "exynos_hdmi_cec.h" +#include "regs-cec.h" +#include "s5p_cec.h" + +#define CEC_NAME "s5p-cec" + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "debug level (0-2)"); + +static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable) +{ + int ret; + struct s5p_cec_dev *cec = cec_get_drvdata(adap); + + if (enable) { + ret = pm_runtime_resume_and_get(cec->dev); + if (ret < 0) + return ret; + + s5p_cec_reset(cec); + + s5p_cec_set_divider(cec); + s5p_cec_threshold(cec); + + s5p_cec_unmask_tx_interrupts(cec); + s5p_cec_unmask_rx_interrupts(cec); + s5p_cec_enable_rx(cec); + } else { + s5p_cec_mask_tx_interrupts(cec); + s5p_cec_mask_rx_interrupts(cec); + pm_runtime_put(cec->dev); + } + + return 0; +} + +static int s5p_cec_adap_log_addr(struct cec_adapter *adap, u8 addr) +{ + struct s5p_cec_dev *cec = cec_get_drvdata(adap); + + s5p_cec_set_addr(cec, addr); + return 0; +} + +static int s5p_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct s5p_cec_dev *cec = cec_get_drvdata(adap); + + /* + * Unclear if 0 retries are allowed by the hardware, so have 1 as + * the minimum. + */ + s5p_cec_copy_packet(cec, msg->msg, msg->len, max(1, attempts - 1)); + return 0; +} + +static irqreturn_t s5p_cec_irq_handler(int irq, void *priv) +{ + struct s5p_cec_dev *cec = priv; + u32 status = 0; + + status = s5p_cec_get_status(cec); + + dev_dbg(cec->dev, "irq received\n"); + + if (status & CEC_STATUS_TX_DONE) { + if (status & CEC_STATUS_TX_NACK) { + dev_dbg(cec->dev, "CEC_STATUS_TX_NACK set\n"); + cec->tx = STATE_NACK; + } else if (status & CEC_STATUS_TX_ERROR) { + dev_dbg(cec->dev, "CEC_STATUS_TX_ERROR set\n"); + cec->tx = STATE_ERROR; + } else { + dev_dbg(cec->dev, "CEC_STATUS_TX_DONE\n"); + cec->tx = STATE_DONE; + } + s5p_clr_pending_tx(cec); + } + + if (status & CEC_STATUS_RX_DONE) { + if (status & CEC_STATUS_RX_ERROR) { + dev_dbg(cec->dev, "CEC_STATUS_RX_ERROR set\n"); + s5p_cec_rx_reset(cec); + s5p_cec_enable_rx(cec); + } else { + dev_dbg(cec->dev, "CEC_STATUS_RX_DONE set\n"); + if (cec->rx != STATE_IDLE) + dev_dbg(cec->dev, "Buffer overrun (worker did not process previous message)\n"); + cec->rx = STATE_BUSY; + cec->msg.len = status >> 24; + if (cec->msg.len > CEC_MAX_MSG_SIZE) + cec->msg.len = CEC_MAX_MSG_SIZE; + cec->msg.rx_status = CEC_RX_STATUS_OK; + s5p_cec_get_rx_buf(cec, cec->msg.len, + cec->msg.msg); + cec->rx = STATE_DONE; + s5p_cec_enable_rx(cec); + } + /* Clear interrupt pending bit */ + s5p_clr_pending_rx(cec); + } + return IRQ_WAKE_THREAD; +} + +static irqreturn_t s5p_cec_irq_handler_thread(int irq, void *priv) +{ + struct s5p_cec_dev *cec = priv; + + dev_dbg(cec->dev, "irq processing thread\n"); + switch (cec->tx) { + case STATE_DONE: + cec_transmit_done(cec->adap, CEC_TX_STATUS_OK, 0, 0, 0, 0); + cec->tx = STATE_IDLE; + break; + case STATE_NACK: + cec_transmit_done(cec->adap, + CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_NACK, + 0, 1, 0, 0); + cec->tx = STATE_IDLE; + break; + case STATE_ERROR: + cec_transmit_done(cec->adap, + CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_ERROR, + 0, 0, 0, 1); + cec->tx = STATE_IDLE; + break; + case STATE_BUSY: + dev_err(cec->dev, "state set to busy, this should not occur here\n"); + break; + default: + break; + } + + switch (cec->rx) { + case STATE_DONE: + cec_received_msg(cec->adap, &cec->msg); + cec->rx = STATE_IDLE; + break; + default: + break; + } + + return IRQ_HANDLED; +} + +static const struct cec_adap_ops s5p_cec_adap_ops = { + .adap_enable = s5p_cec_adap_enable, + .adap_log_addr = s5p_cec_adap_log_addr, + .adap_transmit = s5p_cec_adap_transmit, +}; + +static int s5p_cec_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device *hdmi_dev; + struct s5p_cec_dev *cec; + bool needs_hpd = of_property_read_bool(pdev->dev.of_node, "needs-hpd"); + int ret; + + hdmi_dev = cec_notifier_parse_hdmi_phandle(dev); + + if (IS_ERR(hdmi_dev)) + return PTR_ERR(hdmi_dev); + + cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL); + if (!cec) + return -ENOMEM; + + cec->dev = dev; + + cec->irq = platform_get_irq(pdev, 0); + if (cec->irq < 0) + return cec->irq; + + ret = devm_request_threaded_irq(dev, cec->irq, s5p_cec_irq_handler, + s5p_cec_irq_handler_thread, 0, pdev->name, cec); + if (ret) + return ret; + + cec->clk = devm_clk_get(dev, "hdmicec"); + if (IS_ERR(cec->clk)) + return PTR_ERR(cec->clk); + + cec->pmu = syscon_regmap_lookup_by_phandle(dev->of_node, + "samsung,syscon-phandle"); + if (IS_ERR(cec->pmu)) + return -EPROBE_DEFER; + + cec->reg = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(cec->reg)) + return PTR_ERR(cec->reg); + + cec->adap = cec_allocate_adapter(&s5p_cec_adap_ops, cec, CEC_NAME, + CEC_CAP_DEFAULTS | (needs_hpd ? CEC_CAP_NEEDS_HPD : 0) | + CEC_CAP_CONNECTOR_INFO, 1); + ret = PTR_ERR_OR_ZERO(cec->adap); + if (ret) + return ret; + + cec->notifier = cec_notifier_cec_adap_register(hdmi_dev, NULL, + cec->adap); + if (!cec->notifier) { + ret = -ENOMEM; + goto err_delete_adapter; + } + + ret = cec_register_adapter(cec->adap, &pdev->dev); + if (ret) + goto err_notifier; + + platform_set_drvdata(pdev, cec); + pm_runtime_enable(dev); + + dev_dbg(dev, "successfully probed\n"); + return 0; + +err_notifier: + cec_notifier_cec_adap_unregister(cec->notifier, cec->adap); + +err_delete_adapter: + cec_delete_adapter(cec->adap); + return ret; +} + +static int s5p_cec_remove(struct platform_device *pdev) +{ + struct s5p_cec_dev *cec = platform_get_drvdata(pdev); + + cec_notifier_cec_adap_unregister(cec->notifier, cec->adap); + cec_unregister_adapter(cec->adap); + pm_runtime_disable(&pdev->dev); + return 0; +} + +static int __maybe_unused s5p_cec_runtime_suspend(struct device *dev) +{ + struct s5p_cec_dev *cec = dev_get_drvdata(dev); + + clk_disable_unprepare(cec->clk); + return 0; +} + +static int __maybe_unused s5p_cec_runtime_resume(struct device *dev) +{ + struct s5p_cec_dev *cec = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(cec->clk); + if (ret < 0) + return ret; + return 0; +} + +static const struct dev_pm_ops s5p_cec_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(s5p_cec_runtime_suspend, s5p_cec_runtime_resume, + NULL) +}; + +static const struct of_device_id s5p_cec_match[] = { + { + .compatible = "samsung,s5p-cec", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, s5p_cec_match); + +static struct platform_driver s5p_cec_pdrv = { + .probe = s5p_cec_probe, + .remove = s5p_cec_remove, + .driver = { + .name = CEC_NAME, + .of_match_table = s5p_cec_match, + .pm = &s5p_cec_pm_ops, + }, +}; + +module_platform_driver(s5p_cec_pdrv); + +MODULE_AUTHOR("Kamil Debski "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Samsung S5P CEC driver"); diff --git a/drivers/media/cec/platform/s5p/s5p_cec.h b/drivers/media/cec/platform/s5p/s5p_cec.h new file mode 100644 index 000000000..34d033b20 --- /dev/null +++ b/drivers/media/cec/platform/s5p/s5p_cec.h @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* drivers/media/platform/s5p-cec/s5p_cec.h + * + * Samsung S5P HDMI CEC driver + * + * Copyright (c) 2014 Samsung Electronics Co., Ltd. + */ + +#ifndef _S5P_CEC_H_ +#define _S5P_CEC_H_ __FILE__ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "exynos_hdmi_cec.h" +#include "regs-cec.h" +#include "s5p_cec.h" + +#define CEC_NAME "s5p-cec" + +#define CEC_STATUS_TX_RUNNING (1 << 0) +#define CEC_STATUS_TX_TRANSFERRING (1 << 1) +#define CEC_STATUS_TX_DONE (1 << 2) +#define CEC_STATUS_TX_ERROR (1 << 3) +#define CEC_STATUS_TX_NACK (1 << 4) +#define CEC_STATUS_TX_BYTES (0xFF << 8) +#define CEC_STATUS_RX_RUNNING (1 << 16) +#define CEC_STATUS_RX_RECEIVING (1 << 17) +#define CEC_STATUS_RX_DONE (1 << 18) +#define CEC_STATUS_RX_ERROR (1 << 19) +#define CEC_STATUS_RX_BCAST (1 << 20) +#define CEC_STATUS_RX_BYTES (0xFF << 24) + +#define CEC_WORKER_TX_DONE (1 << 0) +#define CEC_WORKER_RX_MSG (1 << 1) + +/* CEC Rx buffer size */ +#define CEC_RX_BUFF_SIZE 16 +/* CEC Tx buffer size */ +#define CEC_TX_BUFF_SIZE 16 + +enum cec_state { + STATE_IDLE, + STATE_BUSY, + STATE_DONE, + STATE_NACK, + STATE_ERROR +}; + +struct cec_notifier; + +struct s5p_cec_dev { + struct cec_adapter *adap; + struct clk *clk; + struct device *dev; + struct mutex lock; + struct regmap *pmu; + struct cec_notifier *notifier; + int irq; + void __iomem *reg; + + enum cec_state rx; + enum cec_state tx; + struct cec_msg msg; +}; + +#endif /* _S5P_CEC_H_ */ -- cgit v1.2.3