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/i2c/Kconfig | 14 + drivers/media/cec/i2c/Makefile | 5 + drivers/media/cec/i2c/ch7322.c | 602 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 621 insertions(+) create mode 100644 drivers/media/cec/i2c/Kconfig create mode 100644 drivers/media/cec/i2c/Makefile create mode 100644 drivers/media/cec/i2c/ch7322.c (limited to 'drivers/media/cec/i2c') diff --git a/drivers/media/cec/i2c/Kconfig b/drivers/media/cec/i2c/Kconfig new file mode 100644 index 000000000..70432a1d6 --- /dev/null +++ b/drivers/media/cec/i2c/Kconfig @@ -0,0 +1,14 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# I2C drivers + +config CEC_CH7322 + tristate "Chrontel CH7322 CEC controller" + depends on I2C + select REGMAP_I2C + select CEC_CORE + help + This is a driver for the Chrontel CH7322 CEC controller. It uses the + generic CEC framework interface. + CEC bus is present in the HDMI connector and enables communication + between compatible devices. diff --git a/drivers/media/cec/i2c/Makefile b/drivers/media/cec/i2c/Makefile new file mode 100644 index 000000000..d7496dfd0 --- /dev/null +++ b/drivers/media/cec/i2c/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the CEC I2C device drivers. +# +obj-$(CONFIG_CEC_CH7322) += ch7322.o diff --git a/drivers/media/cec/i2c/ch7322.c b/drivers/media/cec/i2c/ch7322.c new file mode 100644 index 000000000..34fad7123 --- /dev/null +++ b/drivers/media/cec/i2c/ch7322.c @@ -0,0 +1,602 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for the Chrontel CH7322 CEC Controller + * + * Copyright 2020 Google LLC. + */ + +/* + * Notes + * + * - This device powers on in Auto Mode which has limited functionality. This + * driver disables Auto Mode when it attaches. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CH7322_WRITE 0x00 +#define CH7322_WRITE_MSENT 0x80 +#define CH7322_WRITE_BOK 0x40 +#define CH7322_WRITE_NMASK 0x0f + +/* Write buffer is 0x01-0x10 */ +#define CH7322_WRBUF 0x01 +#define CH7322_WRBUF_LEN 0x10 + +#define CH7322_READ 0x40 +#define CH7322_READ_NRDT 0x80 +#define CH7322_READ_MSENT 0x20 +#define CH7322_READ_NMASK 0x0f + +/* Read buffer is 0x41-0x50 */ +#define CH7322_RDBUF 0x41 +#define CH7322_RDBUF_LEN 0x10 + +#define CH7322_MODE 0x11 +#define CH7322_MODE_AUTO 0x78 +#define CH7322_MODE_SW 0xb5 + +#define CH7322_RESET 0x12 +#define CH7322_RESET_RST 0x00 + +#define CH7322_POWER 0x13 +#define CH7322_POWER_FPD 0x04 + +#define CH7322_CFG0 0x17 +#define CH7322_CFG0_EOBEN 0x40 +#define CH7322_CFG0_PEOB 0x20 +#define CH7322_CFG0_CLRSPP 0x10 +#define CH7322_CFG0_FLOW 0x08 + +#define CH7322_CFG1 0x1a +#define CH7322_CFG1_STDBYO 0x04 +#define CH7322_CFG1_HPBP 0x02 +#define CH7322_CFG1_PIO 0x01 + +#define CH7322_INTCTL 0x1b +#define CH7322_INTCTL_INTPB 0x80 +#define CH7322_INTCTL_STDBY 0x40 +#define CH7322_INTCTL_HPDFALL 0x20 +#define CH7322_INTCTL_HPDRISE 0x10 +#define CH7322_INTCTL_RXMSG 0x08 +#define CH7322_INTCTL_TXMSG 0x04 +#define CH7322_INTCTL_NEWPHA 0x02 +#define CH7322_INTCTL_ERROR 0x01 + +#define CH7322_DVCLKFNH 0x1d +#define CH7322_DVCLKFNL 0x1e + +#define CH7322_CTL 0x31 +#define CH7322_CTL_FSTDBY 0x80 +#define CH7322_CTL_PLSEN 0x40 +#define CH7322_CTL_PLSPB 0x20 +#define CH7322_CTL_SPADL 0x10 +#define CH7322_CTL_HINIT 0x08 +#define CH7322_CTL_WPHYA 0x04 +#define CH7322_CTL_H1T 0x02 +#define CH7322_CTL_S1T 0x01 + +#define CH7322_PAWH 0x32 +#define CH7322_PAWL 0x33 + +#define CH7322_ADDLW 0x34 +#define CH7322_ADDLW_MASK 0xf0 + +#define CH7322_ADDLR 0x3d +#define CH7322_ADDLR_HPD 0x80 +#define CH7322_ADDLR_MASK 0x0f + +#define CH7322_INTDATA 0x3e +#define CH7322_INTDATA_MODE 0x80 +#define CH7322_INTDATA_STDBY 0x40 +#define CH7322_INTDATA_HPDFALL 0x20 +#define CH7322_INTDATA_HPDRISE 0x10 +#define CH7322_INTDATA_RXMSG 0x08 +#define CH7322_INTDATA_TXMSG 0x04 +#define CH7322_INTDATA_NEWPHA 0x02 +#define CH7322_INTDATA_ERROR 0x01 + +#define CH7322_EVENT 0x3f +#define CH7322_EVENT_TXERR 0x80 +#define CH7322_EVENT_HRST 0x40 +#define CH7322_EVENT_HFST 0x20 +#define CH7322_EVENT_PHACHG 0x10 +#define CH7322_EVENT_ACTST 0x08 +#define CH7322_EVENT_PHARDY 0x04 +#define CH7322_EVENT_BSOK 0x02 +#define CH7322_EVENT_ERRADCF 0x01 + +#define CH7322_DID 0x51 +#define CH7322_DID_CH7322 0x5b +#define CH7322_DID_CH7323 0x5f + +#define CH7322_REVISIONID 0x52 + +#define CH7322_PARH 0x53 +#define CH7322_PARL 0x54 + +#define CH7322_IOCFG2 0x75 +#define CH7322_IOCFG_CIO 0x80 +#define CH7322_IOCFG_IOCFGMASK 0x78 +#define CH7322_IOCFG_AUDIO 0x04 +#define CH7322_IOCFG_SPAMST 0x02 +#define CH7322_IOCFG_SPAMSP 0x01 + +#define CH7322_CTL3 0x7b +#define CH7322_CTL3_SWENA 0x80 +#define CH7322_CTL3_FC_INIT 0x40 +#define CH7322_CTL3_SML_FL 0x20 +#define CH7322_CTL3_SM_RDST 0x10 +#define CH7322_CTL3_SPP_CIAH 0x08 +#define CH7322_CTL3_SPP_CIAL 0x04 +#define CH7322_CTL3_SPP_ACTH 0x02 +#define CH7322_CTL3_SPP_ACTL 0x01 + +/* BOK status means NACK */ +#define CH7322_TX_FLAG_NACK BIT(0) +/* Device will retry automatically */ +#define CH7322_TX_FLAG_RETRY BIT(1) + +struct ch7322 { + struct i2c_client *i2c; + struct regmap *regmap; + struct cec_adapter *cec; + struct mutex mutex; /* device access mutex */ + u8 tx_flags; +}; + +static const struct regmap_config ch7322_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x7f, + .disable_locking = true, +}; + +static int ch7322_send_message(struct ch7322 *ch7322, const struct cec_msg *msg) +{ + unsigned int val; + unsigned int len = msg->len; + int ret; + int i; + + WARN_ON(!mutex_is_locked(&ch7322->mutex)); + + if (len > CH7322_WRBUF_LEN || len < 1) + return -EINVAL; + + ret = regmap_read(ch7322->regmap, CH7322_WRITE, &val); + if (ret) + return ret; + + /* Buffer not ready */ + if (!(val & CH7322_WRITE_MSENT)) + return -EBUSY; + + if (cec_msg_opcode(msg) == -1 && + cec_msg_initiator(msg) == cec_msg_destination(msg)) { + ch7322->tx_flags = CH7322_TX_FLAG_NACK | CH7322_TX_FLAG_RETRY; + } else if (cec_msg_is_broadcast(msg)) { + ch7322->tx_flags = CH7322_TX_FLAG_NACK; + } else { + ch7322->tx_flags = CH7322_TX_FLAG_RETRY; + } + + ret = regmap_write(ch7322->regmap, CH7322_WRITE, len - 1); + if (ret) + return ret; + + for (i = 0; i < len; i++) { + ret = regmap_write(ch7322->regmap, + CH7322_WRBUF + i, msg->msg[i]); + if (ret) + return ret; + } + + return 0; +} + +static int ch7322_receive_message(struct ch7322 *ch7322, struct cec_msg *msg) +{ + unsigned int val; + int ret = 0; + int i; + + WARN_ON(!mutex_is_locked(&ch7322->mutex)); + + ret = regmap_read(ch7322->regmap, CH7322_READ, &val); + if (ret) + return ret; + + /* Message not ready */ + if (!(val & CH7322_READ_NRDT)) + return -EIO; + + msg->len = (val & CH7322_READ_NMASK) + 1; + + /* Read entire RDBUF to clear state */ + for (i = 0; i < CH7322_RDBUF_LEN; i++) { + ret = regmap_read(ch7322->regmap, CH7322_RDBUF + i, &val); + if (ret) + return ret; + msg->msg[i] = (u8)val; + } + + return 0; +} + +static void ch7322_tx_done(struct ch7322 *ch7322) +{ + int ret; + unsigned int val; + u8 status, flags; + + mutex_lock(&ch7322->mutex); + ret = regmap_read(ch7322->regmap, CH7322_WRITE, &val); + flags = ch7322->tx_flags; + mutex_unlock(&ch7322->mutex); + + /* + * The device returns a one-bit OK status which usually means ACK but + * actually means NACK when sending a logical address query or a + * broadcast. + */ + if (ret) + status = CEC_TX_STATUS_ERROR; + else if ((val & CH7322_WRITE_BOK) && (flags & CH7322_TX_FLAG_NACK)) + status = CEC_TX_STATUS_NACK; + else if (val & CH7322_WRITE_BOK) + status = CEC_TX_STATUS_OK; + else if (flags & CH7322_TX_FLAG_NACK) + status = CEC_TX_STATUS_OK; + else + status = CEC_TX_STATUS_NACK; + + if (status == CEC_TX_STATUS_NACK && (flags & CH7322_TX_FLAG_RETRY)) + status |= CEC_TX_STATUS_MAX_RETRIES; + + cec_transmit_attempt_done(ch7322->cec, status); +} + +static void ch7322_rx_done(struct ch7322 *ch7322) +{ + struct cec_msg msg; + int ret; + + mutex_lock(&ch7322->mutex); + ret = ch7322_receive_message(ch7322, &msg); + mutex_unlock(&ch7322->mutex); + + if (ret) + dev_err(&ch7322->i2c->dev, "cec receive error: %d\n", ret); + else + cec_received_msg(ch7322->cec, &msg); +} + +/* + * This device can either monitor the DDC lines to obtain the physical address + * or it can allow the host to program it. This driver lets the device obtain + * it. + */ +static void ch7322_phys_addr(struct ch7322 *ch7322) +{ + unsigned int pah, pal; + int ret = 0; + + mutex_lock(&ch7322->mutex); + ret |= regmap_read(ch7322->regmap, CH7322_PARH, &pah); + ret |= regmap_read(ch7322->regmap, CH7322_PARL, &pal); + mutex_unlock(&ch7322->mutex); + + if (ret) + dev_err(&ch7322->i2c->dev, "phys addr error\n"); + else + cec_s_phys_addr(ch7322->cec, pal | (pah << 8), false); +} + +static irqreturn_t ch7322_irq(int irq, void *dev) +{ + struct ch7322 *ch7322 = dev; + unsigned int data = 0; + + mutex_lock(&ch7322->mutex); + regmap_read(ch7322->regmap, CH7322_INTDATA, &data); + regmap_write(ch7322->regmap, CH7322_INTDATA, data); + mutex_unlock(&ch7322->mutex); + + if (data & CH7322_INTDATA_HPDFALL) + cec_phys_addr_invalidate(ch7322->cec); + + if (data & CH7322_INTDATA_TXMSG) + ch7322_tx_done(ch7322); + + if (data & CH7322_INTDATA_RXMSG) + ch7322_rx_done(ch7322); + + if (data & CH7322_INTDATA_NEWPHA) + ch7322_phys_addr(ch7322); + + if (data & CH7322_INTDATA_ERROR) + dev_dbg(&ch7322->i2c->dev, "unknown error\n"); + + return IRQ_HANDLED; +} + +/* This device is always enabled */ +static int ch7322_cec_adap_enable(struct cec_adapter *adap, bool enable) +{ + return 0; +} + +static int ch7322_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr) +{ + struct ch7322 *ch7322 = cec_get_drvdata(adap); + int ret; + + mutex_lock(&ch7322->mutex); + ret = regmap_update_bits(ch7322->regmap, CH7322_ADDLW, + CH7322_ADDLW_MASK, log_addr << 4); + mutex_unlock(&ch7322->mutex); + + return ret; +} + +static int ch7322_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct ch7322 *ch7322 = cec_get_drvdata(adap); + int ret; + + mutex_lock(&ch7322->mutex); + ret = ch7322_send_message(ch7322, msg); + mutex_unlock(&ch7322->mutex); + + return ret; +} + +static const struct cec_adap_ops ch7322_cec_adap_ops = { + .adap_enable = ch7322_cec_adap_enable, + .adap_log_addr = ch7322_cec_adap_log_addr, + .adap_transmit = ch7322_cec_adap_transmit, +}; + +#if IS_ENABLED(CONFIG_PCI) && IS_ENABLED(CONFIG_DMI) + +struct ch7322_conn_match { + const char *dev_name; + const char *pci_name; + const char *port_name; +}; + +static struct ch7322_conn_match google_endeavour[] = { + { "i2c-PRP0001:00", "0000:00:02.0", "Port B" }, + { "i2c-PRP0001:01", "0000:00:02.0", "Port C" }, + { }, +}; + +static const struct dmi_system_id ch7322_dmi_table[] = { + { + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Google"), + DMI_MATCH(DMI_BOARD_NAME, "Endeavour"), + }, + .driver_data = google_endeavour, + }, + { }, +}; + +/* Make a best-effort attempt to locate a matching HDMI port */ +static int ch7322_get_port(struct i2c_client *client, + struct device **dev, + const char **port) +{ + const struct dmi_system_id *system; + const struct ch7322_conn_match *conn; + + *dev = NULL; + *port = NULL; + + system = dmi_first_match(ch7322_dmi_table); + if (!system) + return 0; + + for (conn = system->driver_data; conn->dev_name; conn++) { + if (!strcmp(dev_name(&client->dev), conn->dev_name)) { + struct device *d; + + d = bus_find_device_by_name(&pci_bus_type, NULL, + conn->pci_name); + if (!d) + return -EPROBE_DEFER; + + put_device(d); + + *dev = d; + *port = conn->port_name; + + return 0; + } + } + + return 0; +} + +#else + +static int ch7322_get_port(struct i2c_client *client, + struct device **dev, + const char **port) +{ + *dev = NULL; + *port = NULL; + + return 0; +} + +#endif + +static int ch7322_probe(struct i2c_client *client) +{ + struct device *hdmi_dev; + const char *port_name; + struct ch7322 *ch7322; + struct cec_notifier *notifier = NULL; + u32 caps = CEC_CAP_DEFAULTS; + int ret; + unsigned int val; + + ret = ch7322_get_port(client, &hdmi_dev, &port_name); + if (ret) + return ret; + + if (hdmi_dev) + caps |= CEC_CAP_CONNECTOR_INFO; + + ch7322 = devm_kzalloc(&client->dev, sizeof(*ch7322), GFP_KERNEL); + if (!ch7322) + return -ENOMEM; + + ch7322->regmap = devm_regmap_init_i2c(client, &ch7322_regmap); + if (IS_ERR(ch7322->regmap)) + return PTR_ERR(ch7322->regmap); + + ret = regmap_read(ch7322->regmap, CH7322_DID, &val); + if (ret) + return ret; + + if (val != CH7322_DID_CH7322) + return -EOPNOTSUPP; + + mutex_init(&ch7322->mutex); + ch7322->i2c = client; + ch7322->tx_flags = 0; + + i2c_set_clientdata(client, ch7322); + + /* Disable auto mode */ + ret = regmap_write(ch7322->regmap, CH7322_MODE, CH7322_MODE_SW); + if (ret) + goto err_mutex; + + /* Enable logical address register */ + ret = regmap_update_bits(ch7322->regmap, CH7322_CTL, + CH7322_CTL_SPADL, CH7322_CTL_SPADL); + if (ret) + goto err_mutex; + + ch7322->cec = cec_allocate_adapter(&ch7322_cec_adap_ops, ch7322, + dev_name(&client->dev), + caps, 1); + + if (IS_ERR(ch7322->cec)) { + ret = PTR_ERR(ch7322->cec); + goto err_mutex; + } + + ch7322->cec->adap_controls_phys_addr = true; + + if (hdmi_dev) { + notifier = cec_notifier_cec_adap_register(hdmi_dev, + port_name, + ch7322->cec); + if (!notifier) { + ret = -ENOMEM; + goto err_cec; + } + } + + /* Configure, mask, and clear interrupt */ + ret = regmap_write(ch7322->regmap, CH7322_CFG1, 0); + if (ret) + goto err_notifier; + ret = regmap_write(ch7322->regmap, CH7322_INTCTL, CH7322_INTCTL_INTPB); + if (ret) + goto err_notifier; + ret = regmap_write(ch7322->regmap, CH7322_INTDATA, 0xff); + if (ret) + goto err_notifier; + + /* If HPD is up read physical address */ + ret = regmap_read(ch7322->regmap, CH7322_ADDLR, &val); + if (ret) + goto err_notifier; + if (val & CH7322_ADDLR_HPD) + ch7322_phys_addr(ch7322); + + ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, + ch7322_irq, + IRQF_ONESHOT | IRQF_TRIGGER_RISING, + client->name, ch7322); + if (ret) + goto err_notifier; + + /* Unmask interrupt */ + mutex_lock(&ch7322->mutex); + ret = regmap_write(ch7322->regmap, CH7322_INTCTL, 0xff); + mutex_unlock(&ch7322->mutex); + + if (ret) + goto err_notifier; + + ret = cec_register_adapter(ch7322->cec, &client->dev); + if (ret) + goto err_notifier; + + dev_info(&client->dev, "device registered\n"); + + return 0; + +err_notifier: + if (notifier) + cec_notifier_cec_adap_unregister(notifier, ch7322->cec); +err_cec: + cec_delete_adapter(ch7322->cec); +err_mutex: + mutex_destroy(&ch7322->mutex); + return ret; +} + +static void ch7322_remove(struct i2c_client *client) +{ + struct ch7322 *ch7322 = i2c_get_clientdata(client); + + /* Mask interrupt */ + mutex_lock(&ch7322->mutex); + regmap_write(ch7322->regmap, CH7322_INTCTL, CH7322_INTCTL_INTPB); + mutex_unlock(&ch7322->mutex); + + cec_unregister_adapter(ch7322->cec); + mutex_destroy(&ch7322->mutex); + + dev_info(&client->dev, "device unregistered\n"); +} + +static const struct of_device_id ch7322_of_match[] = { + { .compatible = "chrontel,ch7322", }, + {}, +}; +MODULE_DEVICE_TABLE(of, ch7322_of_match); + +static struct i2c_driver ch7322_i2c_driver = { + .driver = { + .name = "ch7322", + .of_match_table = of_match_ptr(ch7322_of_match), + }, + .probe_new = ch7322_probe, + .remove = ch7322_remove, +}; + +module_i2c_driver(ch7322_i2c_driver); + +MODULE_DESCRIPTION("Chrontel CH7322 CEC Controller Driver"); +MODULE_AUTHOR("Jeff Chase "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3