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/hwmon/pmbus/ibm-cffps.c | 653 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 653 insertions(+) create mode 100644 drivers/hwmon/pmbus/ibm-cffps.c (limited to 'drivers/hwmon/pmbus/ibm-cffps.c') diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c new file mode 100644 index 000000000..e3294a1a5 --- /dev/null +++ b/drivers/hwmon/pmbus/ibm-cffps.c @@ -0,0 +1,653 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2017 IBM Corp. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "pmbus.h" + +#define CFFPS_MFG_ID_CMD 0x99 +#define CFFPS_FRU_CMD 0x9A +#define CFFPS_PN_CMD 0x9B +#define CFFPS_HEADER_CMD 0x9C +#define CFFPS_SN_CMD 0x9E +#define CFFPS_MAX_POWER_OUT_CMD 0xA7 +#define CFFPS_CCIN_CMD 0xBD +#define CFFPS_FW_CMD 0xFA +#define CFFPS1_FW_NUM_BYTES 4 +#define CFFPS2_FW_NUM_WORDS 3 +#define CFFPS_SYS_CONFIG_CMD 0xDA +#define CFFPS_12VCS_VOUT_CMD 0xDE + +#define CFFPS_INPUT_HISTORY_CMD 0xD6 +#define CFFPS_INPUT_HISTORY_SIZE 100 + +#define CFFPS_CCIN_REVISION GENMASK(7, 0) +#define CFFPS_CCIN_REVISION_LEGACY 0xde +#define CFFPS_CCIN_VERSION GENMASK(15, 8) +#define CFFPS_CCIN_VERSION_1 0x2b +#define CFFPS_CCIN_VERSION_2 0x2e +#define CFFPS_CCIN_VERSION_3 0x51 + +/* STATUS_MFR_SPECIFIC bits */ +#define CFFPS_MFR_FAN_FAULT BIT(0) +#define CFFPS_MFR_THERMAL_FAULT BIT(1) +#define CFFPS_MFR_OV_FAULT BIT(2) +#define CFFPS_MFR_UV_FAULT BIT(3) +#define CFFPS_MFR_PS_KILL BIT(4) +#define CFFPS_MFR_OC_FAULT BIT(5) +#define CFFPS_MFR_VAUX_FAULT BIT(6) +#define CFFPS_MFR_CURRENT_SHARE_WARNING BIT(7) + +#define CFFPS_LED_BLINK (BIT(0) | BIT(6)) +#define CFFPS_LED_ON (BIT(1) | BIT(6)) +#define CFFPS_LED_OFF (BIT(2) | BIT(6)) +#define CFFPS_BLINK_RATE_MS 250 + +enum { + CFFPS_DEBUGFS_INPUT_HISTORY = 0, + CFFPS_DEBUGFS_MFG_ID, + CFFPS_DEBUGFS_FRU, + CFFPS_DEBUGFS_PN, + CFFPS_DEBUGFS_HEADER, + CFFPS_DEBUGFS_SN, + CFFPS_DEBUGFS_MAX_POWER_OUT, + CFFPS_DEBUGFS_CCIN, + CFFPS_DEBUGFS_FW, + CFFPS_DEBUGFS_ON_OFF_CONFIG, + CFFPS_DEBUGFS_NUM_ENTRIES +}; + +enum versions { cffps1, cffps2, cffps_unknown }; + +struct ibm_cffps_input_history { + struct mutex update_lock; + unsigned long last_update; + + u8 byte_count; + u8 data[CFFPS_INPUT_HISTORY_SIZE]; +}; + +struct ibm_cffps { + enum versions version; + struct i2c_client *client; + + struct ibm_cffps_input_history input_history; + + int debugfs_entries[CFFPS_DEBUGFS_NUM_ENTRIES]; + + char led_name[32]; + u8 led_state; + struct led_classdev led; +}; + +static const struct i2c_device_id ibm_cffps_id[]; + +#define to_psu(x, y) container_of((x), struct ibm_cffps, debugfs_entries[(y)]) + +static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu, + char __user *buf, size_t count, + loff_t *ppos) +{ + int rc; + u8 msgbuf0[1] = { CFFPS_INPUT_HISTORY_CMD }; + u8 msgbuf1[CFFPS_INPUT_HISTORY_SIZE + 1] = { 0 }; + struct i2c_msg msg[2] = { + { + .addr = psu->client->addr, + .flags = psu->client->flags, + .len = 1, + .buf = msgbuf0, + }, { + .addr = psu->client->addr, + .flags = psu->client->flags | I2C_M_RD, + .len = CFFPS_INPUT_HISTORY_SIZE + 1, + .buf = msgbuf1, + }, + }; + + if (!*ppos) { + mutex_lock(&psu->input_history.update_lock); + if (time_after(jiffies, psu->input_history.last_update + HZ)) { + /* + * Use a raw i2c transfer, since we need more bytes + * than Linux I2C supports through smbus xfr (only 32). + */ + rc = i2c_transfer(psu->client->adapter, msg, 2); + if (rc < 0) { + mutex_unlock(&psu->input_history.update_lock); + return rc; + } + + psu->input_history.byte_count = msgbuf1[0]; + memcpy(psu->input_history.data, &msgbuf1[1], + CFFPS_INPUT_HISTORY_SIZE); + psu->input_history.last_update = jiffies; + } + + mutex_unlock(&psu->input_history.update_lock); + } + + return simple_read_from_buffer(buf, count, ppos, + psu->input_history.data, + psu->input_history.byte_count); +} + +static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + u8 cmd; + int i, rc; + int *idxp = file->private_data; + int idx = *idxp; + struct ibm_cffps *psu = to_psu(idxp, idx); + char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 }; + + pmbus_set_page(psu->client, 0, 0xff); + + switch (idx) { + case CFFPS_DEBUGFS_INPUT_HISTORY: + return ibm_cffps_read_input_history(psu, buf, count, ppos); + case CFFPS_DEBUGFS_MFG_ID: + cmd = CFFPS_MFG_ID_CMD; + break; + case CFFPS_DEBUGFS_FRU: + cmd = CFFPS_FRU_CMD; + break; + case CFFPS_DEBUGFS_PN: + cmd = CFFPS_PN_CMD; + break; + case CFFPS_DEBUGFS_HEADER: + cmd = CFFPS_HEADER_CMD; + break; + case CFFPS_DEBUGFS_SN: + cmd = CFFPS_SN_CMD; + break; + case CFFPS_DEBUGFS_MAX_POWER_OUT: + if (psu->version == cffps1) { + rc = i2c_smbus_read_word_swapped(psu->client, + CFFPS_MAX_POWER_OUT_CMD); + } else { + rc = i2c_smbus_read_word_data(psu->client, + CFFPS_MAX_POWER_OUT_CMD); + } + + if (rc < 0) + return rc; + + rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc); + goto done; + case CFFPS_DEBUGFS_CCIN: + rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD); + if (rc < 0) + return rc; + + rc = snprintf(data, 5, "%04X", rc); + goto done; + case CFFPS_DEBUGFS_FW: + switch (psu->version) { + case cffps1: + for (i = 0; i < CFFPS1_FW_NUM_BYTES; ++i) { + rc = i2c_smbus_read_byte_data(psu->client, + CFFPS_FW_CMD + + i); + if (rc < 0) + return rc; + + snprintf(&data[i * 2], 3, "%02X", rc); + } + + rc = i * 2; + break; + case cffps2: + for (i = 0; i < CFFPS2_FW_NUM_WORDS; ++i) { + rc = i2c_smbus_read_word_data(psu->client, + CFFPS_FW_CMD + + i); + if (rc < 0) + return rc; + + snprintf(&data[i * 4], 5, "%04X", rc); + } + + rc = i * 4; + break; + default: + return -EOPNOTSUPP; + } + goto done; + case CFFPS_DEBUGFS_ON_OFF_CONFIG: + rc = i2c_smbus_read_byte_data(psu->client, + PMBUS_ON_OFF_CONFIG); + if (rc < 0) + return rc; + + rc = snprintf(data, 3, "%02x", rc); + goto done; + default: + return -EINVAL; + } + + rc = i2c_smbus_read_block_data(psu->client, cmd, data); + if (rc < 0) + return rc; + +done: + data[rc] = '\n'; + rc += 2; + + return simple_read_from_buffer(buf, count, ppos, data, rc); +} + +static ssize_t ibm_cffps_debugfs_write(struct file *file, + const char __user *buf, size_t count, + loff_t *ppos) +{ + u8 data; + ssize_t rc; + int *idxp = file->private_data; + int idx = *idxp; + struct ibm_cffps *psu = to_psu(idxp, idx); + + switch (idx) { + case CFFPS_DEBUGFS_ON_OFF_CONFIG: + pmbus_set_page(psu->client, 0, 0xff); + + rc = simple_write_to_buffer(&data, 1, ppos, buf, count); + if (rc <= 0) + return rc; + + rc = i2c_smbus_write_byte_data(psu->client, + PMBUS_ON_OFF_CONFIG, data); + if (rc) + return rc; + + rc = 1; + break; + default: + return -EINVAL; + } + + return rc; +} + +static const struct file_operations ibm_cffps_fops = { + .llseek = noop_llseek, + .read = ibm_cffps_debugfs_read, + .write = ibm_cffps_debugfs_write, + .open = simple_open, +}; + +static int ibm_cffps_read_byte_data(struct i2c_client *client, int page, + int reg) +{ + int rc, mfr; + + switch (reg) { + case PMBUS_STATUS_VOUT: + case PMBUS_STATUS_IOUT: + case PMBUS_STATUS_TEMPERATURE: + case PMBUS_STATUS_FAN_12: + rc = pmbus_read_byte_data(client, page, reg); + if (rc < 0) + return rc; + + mfr = pmbus_read_byte_data(client, page, + PMBUS_STATUS_MFR_SPECIFIC); + if (mfr < 0) + /* + * Return the status register instead of an error, + * since we successfully read status. + */ + return rc; + + /* Add MFR_SPECIFIC bits to the standard pmbus status regs. */ + if (reg == PMBUS_STATUS_FAN_12) { + if (mfr & CFFPS_MFR_FAN_FAULT) + rc |= PB_FAN_FAN1_FAULT; + } else if (reg == PMBUS_STATUS_TEMPERATURE) { + if (mfr & CFFPS_MFR_THERMAL_FAULT) + rc |= PB_TEMP_OT_FAULT; + } else if (reg == PMBUS_STATUS_VOUT) { + if (mfr & (CFFPS_MFR_OV_FAULT | CFFPS_MFR_VAUX_FAULT)) + rc |= PB_VOLTAGE_OV_FAULT; + if (mfr & CFFPS_MFR_UV_FAULT) + rc |= PB_VOLTAGE_UV_FAULT; + } else if (reg == PMBUS_STATUS_IOUT) { + if (mfr & CFFPS_MFR_OC_FAULT) + rc |= PB_IOUT_OC_FAULT; + if (mfr & CFFPS_MFR_CURRENT_SHARE_WARNING) + rc |= PB_CURRENT_SHARE_FAULT; + } + break; + default: + rc = -ENODATA; + break; + } + + return rc; +} + +static int ibm_cffps_read_word_data(struct i2c_client *client, int page, + int phase, int reg) +{ + int rc, mfr; + + switch (reg) { + case PMBUS_STATUS_WORD: + rc = pmbus_read_word_data(client, page, phase, reg); + if (rc < 0) + return rc; + + mfr = pmbus_read_byte_data(client, page, + PMBUS_STATUS_MFR_SPECIFIC); + if (mfr < 0) + /* + * Return the status register instead of an error, + * since we successfully read status. + */ + return rc; + + if (mfr & CFFPS_MFR_PS_KILL) + rc |= PB_STATUS_OFF; + break; + case PMBUS_VIRT_READ_VMON: + rc = pmbus_read_word_data(client, page, phase, + CFFPS_12VCS_VOUT_CMD); + break; + default: + rc = -ENODATA; + break; + } + + return rc; +} + +static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + int rc; + u8 next_led_state; + struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led); + + if (brightness == LED_OFF) { + next_led_state = CFFPS_LED_OFF; + } else { + brightness = LED_FULL; + + if (psu->led_state != CFFPS_LED_BLINK) + next_led_state = CFFPS_LED_ON; + else + next_led_state = CFFPS_LED_BLINK; + } + + dev_dbg(&psu->client->dev, "LED brightness set: %d. Command: %d.\n", + brightness, next_led_state); + + pmbus_set_page(psu->client, 0, 0xff); + + rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD, + next_led_state); + if (rc < 0) + return rc; + + psu->led_state = next_led_state; + led_cdev->brightness = brightness; + + return 0; +} + +static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + int rc; + struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led); + + dev_dbg(&psu->client->dev, "LED blink set.\n"); + + pmbus_set_page(psu->client, 0, 0xff); + + rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD, + CFFPS_LED_BLINK); + if (rc < 0) + return rc; + + psu->led_state = CFFPS_LED_BLINK; + led_cdev->brightness = LED_FULL; + *delay_on = CFFPS_BLINK_RATE_MS; + *delay_off = CFFPS_BLINK_RATE_MS; + + return 0; +} + +static void ibm_cffps_create_led_class(struct ibm_cffps *psu) +{ + int rc; + struct i2c_client *client = psu->client; + struct device *dev = &client->dev; + + snprintf(psu->led_name, sizeof(psu->led_name), "%s-%02x", client->name, + client->addr); + psu->led.name = psu->led_name; + psu->led.max_brightness = LED_FULL; + psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set; + psu->led.blink_set = ibm_cffps_led_blink_set; + + rc = devm_led_classdev_register(dev, &psu->led); + if (rc) + dev_warn(dev, "failed to register led class: %d\n", rc); + else + i2c_smbus_write_byte_data(client, CFFPS_SYS_CONFIG_CMD, + CFFPS_LED_OFF); +} + +static struct pmbus_driver_info ibm_cffps_info[] = { + [cffps1] = { + .pages = 1, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | + PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | + PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP | + PMBUS_HAVE_STATUS_FAN12, + .read_byte_data = ibm_cffps_read_byte_data, + .read_word_data = ibm_cffps_read_word_data, + }, + [cffps2] = { + .pages = 2, + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | + PMBUS_HAVE_PIN | PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | + PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP | + PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_VMON, + .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | + PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT, + .read_byte_data = ibm_cffps_read_byte_data, + .read_word_data = ibm_cffps_read_word_data, + }, +}; + +static struct pmbus_platform_data ibm_cffps_pdata = { + .flags = PMBUS_SKIP_STATUS_CHECK | PMBUS_NO_CAPABILITY, +}; + +static int ibm_cffps_probe(struct i2c_client *client) +{ + int i, rc; + enum versions vs = cffps_unknown; + struct dentry *debugfs; + struct dentry *ibm_cffps_dir; + struct ibm_cffps *psu; + const void *md = of_device_get_match_data(&client->dev); + const struct i2c_device_id *id; + + if (md) { + vs = (enum versions)md; + } else { + id = i2c_match_id(ibm_cffps_id, client); + if (id) + vs = (enum versions)id->driver_data; + } + + if (vs == cffps_unknown) { + u16 ccin_revision = 0; + u16 ccin_version = CFFPS_CCIN_VERSION_1; + int ccin = i2c_smbus_read_word_swapped(client, CFFPS_CCIN_CMD); + char mfg_id[I2C_SMBUS_BLOCK_MAX + 2] = { 0 }; + + if (ccin > 0) { + ccin_revision = FIELD_GET(CFFPS_CCIN_REVISION, ccin); + ccin_version = FIELD_GET(CFFPS_CCIN_VERSION, ccin); + } + + rc = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, mfg_id); + if (rc < 0) { + dev_err(&client->dev, "Failed to read Manufacturer ID\n"); + return rc; + } + + switch (ccin_version) { + default: + case CFFPS_CCIN_VERSION_1: + if ((strncmp(mfg_id, "ACBE", 4) == 0) || + (strncmp(mfg_id, "ARTE", 4) == 0)) + vs = cffps1; + else + vs = cffps2; + break; + case CFFPS_CCIN_VERSION_2: + vs = cffps2; + break; + case CFFPS_CCIN_VERSION_3: + if (ccin_revision == CFFPS_CCIN_REVISION_LEGACY) + vs = cffps1; + else + vs = cffps2; + break; + } + + /* Set the client name to include the version number. */ + snprintf(client->name, I2C_NAME_SIZE, "cffps%d", vs + 1); + } + + client->dev.platform_data = &ibm_cffps_pdata; + rc = pmbus_do_probe(client, &ibm_cffps_info[vs]); + if (rc) + return rc; + + /* + * Don't fail the probe if there isn't enough memory for leds and + * debugfs. + */ + psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL); + if (!psu) + return 0; + + psu->version = vs; + psu->client = client; + mutex_init(&psu->input_history.update_lock); + psu->input_history.last_update = jiffies - HZ; + + ibm_cffps_create_led_class(psu); + + /* Don't fail the probe if we can't create debugfs */ + debugfs = pmbus_get_debugfs_dir(client); + if (!debugfs) + return 0; + + ibm_cffps_dir = debugfs_create_dir(client->name, debugfs); + if (!ibm_cffps_dir) + return 0; + + for (i = 0; i < CFFPS_DEBUGFS_NUM_ENTRIES; ++i) + psu->debugfs_entries[i] = i; + + debugfs_create_file("input_history", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_INPUT_HISTORY], + &ibm_cffps_fops); + debugfs_create_file("mfg_id", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_MFG_ID], + &ibm_cffps_fops); + debugfs_create_file("fru", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_FRU], + &ibm_cffps_fops); + debugfs_create_file("part_number", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_PN], + &ibm_cffps_fops); + debugfs_create_file("header", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_HEADER], + &ibm_cffps_fops); + debugfs_create_file("serial_number", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_SN], + &ibm_cffps_fops); + debugfs_create_file("max_power_out", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT], + &ibm_cffps_fops); + debugfs_create_file("ccin", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN], + &ibm_cffps_fops); + debugfs_create_file("fw_version", 0444, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_FW], + &ibm_cffps_fops); + debugfs_create_file("on_off_config", 0644, ibm_cffps_dir, + &psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG], + &ibm_cffps_fops); + + return 0; +} + +static const struct i2c_device_id ibm_cffps_id[] = { + { "ibm_cffps1", cffps1 }, + { "ibm_cffps2", cffps2 }, + { "ibm_cffps", cffps_unknown }, + {} +}; +MODULE_DEVICE_TABLE(i2c, ibm_cffps_id); + +static const struct of_device_id ibm_cffps_of_match[] = { + { + .compatible = "ibm,cffps1", + .data = (void *)cffps1 + }, + { + .compatible = "ibm,cffps2", + .data = (void *)cffps2 + }, + { + .compatible = "ibm,cffps", + .data = (void *)cffps_unknown + }, + {} +}; +MODULE_DEVICE_TABLE(of, ibm_cffps_of_match); + +static struct i2c_driver ibm_cffps_driver = { + .driver = { + .name = "ibm-cffps", + .of_match_table = ibm_cffps_of_match, + }, + .probe_new = ibm_cffps_probe, + .id_table = ibm_cffps_id, +}; + +module_i2c_driver(ibm_cffps_driver); + +MODULE_AUTHOR("Eddie James"); +MODULE_DESCRIPTION("PMBus driver for IBM Common Form Factor power supplies"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(PMBUS); -- cgit v1.2.3