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/acpi/sbs.c | 713 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 713 insertions(+) create mode 100644 drivers/acpi/sbs.c (limited to 'drivers/acpi/sbs.c') diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c new file mode 100644 index 000000000..e90752d4f --- /dev/null +++ b/drivers/acpi/sbs.c @@ -0,0 +1,713 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $) + * + * Copyright (c) 2007 Alexey Starikovskiy + * Copyright (c) 2005-2007 Vladimir Lebedev + * Copyright (c) 2005 Rich Townsend + */ + +#define pr_fmt(fmt) "ACPI: " fmt + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "sbshc.h" + +#define ACPI_SBS_CLASS "sbs" +#define ACPI_AC_CLASS "ac_adapter" +#define ACPI_SBS_DEVICE_NAME "Smart Battery System" +#define ACPI_BATTERY_DIR_NAME "BAT%i" +#define ACPI_AC_DIR_NAME "AC0" + +#define ACPI_SBS_NOTIFY_STATUS 0x80 +#define ACPI_SBS_NOTIFY_INFO 0x81 + +MODULE_AUTHOR("Alexey Starikovskiy "); +MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); +MODULE_LICENSE("GPL"); + +static unsigned int cache_time = 1000; +module_param(cache_time, uint, 0644); +MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); + +#define MAX_SBS_BAT 4 +#define ACPI_SBS_BLOCK_MAX 32 + +static const struct acpi_device_id sbs_device_ids[] = { + {"ACPI0002", 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, sbs_device_ids); + +struct acpi_battery { + struct power_supply *bat; + struct power_supply_desc bat_desc; + struct acpi_sbs *sbs; + unsigned long update_time; + char name[8]; + char manufacturer_name[ACPI_SBS_BLOCK_MAX]; + char device_name[ACPI_SBS_BLOCK_MAX]; + char device_chemistry[ACPI_SBS_BLOCK_MAX]; + u16 alarm_capacity; + u16 full_charge_capacity; + u16 design_capacity; + u16 design_voltage; + u16 serial_number; + u16 cycle_count; + u16 temp_now; + u16 voltage_now; + s16 rate_now; + s16 rate_avg; + u16 capacity_now; + u16 state_of_charge; + u16 state; + u16 mode; + u16 spec; + u8 id; + u8 present:1; + u8 have_sysfs_alarm:1; +}; + +#define to_acpi_battery(x) power_supply_get_drvdata(x) + +struct acpi_sbs { + struct power_supply *charger; + struct acpi_device *device; + struct acpi_smb_hc *hc; + struct mutex lock; + struct acpi_battery battery[MAX_SBS_BAT]; + u8 batteries_supported:4; + u8 manager_present:1; + u8 charger_present:1; + u8 charger_exists:1; +}; + +#define to_acpi_sbs(x) power_supply_get_drvdata(x) + +static void acpi_sbs_remove(struct acpi_device *device); +static int acpi_battery_get_state(struct acpi_battery *battery); + +static inline int battery_scale(int log) +{ + int scale = 1; + while (log--) + scale *= 10; + return scale; +} + +static inline int acpi_battery_vscale(struct acpi_battery *battery) +{ + return battery_scale((battery->spec & 0x0f00) >> 8); +} + +static inline int acpi_battery_ipscale(struct acpi_battery *battery) +{ + return battery_scale((battery->spec & 0xf000) >> 12); +} + +static inline int acpi_battery_mode(struct acpi_battery *battery) +{ + return (battery->mode & 0x8000); +} + +static inline int acpi_battery_scale(struct acpi_battery *battery) +{ + return (acpi_battery_mode(battery) ? 10 : 1) * + acpi_battery_ipscale(battery); +} + +static int sbs_get_ac_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct acpi_sbs *sbs = to_acpi_sbs(psy); + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + val->intval = sbs->charger_present; + break; + default: + return -EINVAL; + } + return 0; +} + +static int acpi_battery_technology(struct acpi_battery *battery) +{ + if (!strcasecmp("NiCd", battery->device_chemistry)) + return POWER_SUPPLY_TECHNOLOGY_NiCd; + if (!strcasecmp("NiMH", battery->device_chemistry)) + return POWER_SUPPLY_TECHNOLOGY_NiMH; + if (!strcasecmp("LION", battery->device_chemistry)) + return POWER_SUPPLY_TECHNOLOGY_LION; + if (!strcasecmp("LiP", battery->device_chemistry)) + return POWER_SUPPLY_TECHNOLOGY_LIPO; + return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; +} + +static int acpi_sbs_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct acpi_battery *battery = to_acpi_battery(psy); + + if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) + return -ENODEV; + + acpi_battery_get_state(battery); + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + if (battery->rate_now < 0) + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + else if (battery->rate_now > 0) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else + val->intval = POWER_SUPPLY_STATUS_FULL; + break; + case POWER_SUPPLY_PROP_PRESENT: + val->intval = battery->present; + break; + case POWER_SUPPLY_PROP_TECHNOLOGY: + val->intval = acpi_battery_technology(battery); + break; + case POWER_SUPPLY_PROP_CYCLE_COUNT: + val->intval = battery->cycle_count; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + val->intval = battery->design_voltage * + acpi_battery_vscale(battery) * 1000; + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = battery->voltage_now * + acpi_battery_vscale(battery) * 1000; + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + case POWER_SUPPLY_PROP_POWER_NOW: + val->intval = abs(battery->rate_now) * + acpi_battery_ipscale(battery) * 1000; + val->intval *= (acpi_battery_mode(battery)) ? + (battery->voltage_now * + acpi_battery_vscale(battery) / 1000) : 1; + break; + case POWER_SUPPLY_PROP_CURRENT_AVG: + case POWER_SUPPLY_PROP_POWER_AVG: + val->intval = abs(battery->rate_avg) * + acpi_battery_ipscale(battery) * 1000; + val->intval *= (acpi_battery_mode(battery)) ? + (battery->voltage_now * + acpi_battery_vscale(battery) / 1000) : 1; + break; + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = battery->state_of_charge; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: + case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: + val->intval = battery->design_capacity * + acpi_battery_scale(battery) * 1000; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL: + case POWER_SUPPLY_PROP_ENERGY_FULL: + val->intval = battery->full_charge_capacity * + acpi_battery_scale(battery) * 1000; + break; + case POWER_SUPPLY_PROP_CHARGE_NOW: + case POWER_SUPPLY_PROP_ENERGY_NOW: + val->intval = battery->capacity_now * + acpi_battery_scale(battery) * 1000; + break; + case POWER_SUPPLY_PROP_TEMP: + val->intval = battery->temp_now - 2730; // dK -> dC + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = battery->device_name; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = battery->manufacturer_name; + break; + default: + return -EINVAL; + } + return 0; +} + +static enum power_supply_property sbs_ac_props[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static enum power_supply_property sbs_charge_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_CYCLE_COUNT, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CURRENT_AVG, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static enum power_supply_property sbs_energy_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CURRENT_AVG, + POWER_SUPPLY_PROP_POWER_NOW, + POWER_SUPPLY_PROP_POWER_AVG, + POWER_SUPPLY_PROP_CAPACITY, + POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, + POWER_SUPPLY_PROP_ENERGY_FULL, + POWER_SUPPLY_PROP_ENERGY_NOW, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static const struct power_supply_desc acpi_sbs_charger_desc = { + .name = "sbs-charger", + .type = POWER_SUPPLY_TYPE_MAINS, + .properties = sbs_ac_props, + .num_properties = ARRAY_SIZE(sbs_ac_props), + .get_property = sbs_get_ac_property, +}; + +/* -------------------------------------------------------------------------- + Smart Battery System Management + -------------------------------------------------------------------------- */ + +struct acpi_battery_reader { + u8 command; /* command for battery */ + u8 mode; /* word or block? */ + size_t offset; /* offset inside struct acpi_sbs_battery */ +}; + +static struct acpi_battery_reader info_readers[] = { + {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, + {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, + {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, + {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, + {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, + {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, + {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, + {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, + {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, + {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, + {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, +}; + +static struct acpi_battery_reader state_readers[] = { + {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, + {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, + {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, + {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, + {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, + {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, + {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, +}; + +static int acpi_manager_get_info(struct acpi_sbs *sbs) +{ + int result = 0; + u16 battery_system_info; + + result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, + 0x04, (u8 *)&battery_system_info); + if (!result) + sbs->batteries_supported = battery_system_info & 0x000f; + return result; +} + +static int acpi_battery_get_info(struct acpi_battery *battery) +{ + int i, result = 0; + + for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { + result = acpi_smbus_read(battery->sbs->hc, + info_readers[i].mode, + ACPI_SBS_BATTERY, + info_readers[i].command, + (u8 *) battery + + info_readers[i].offset); + if (result) + break; + } + return result; +} + +static int acpi_battery_get_state(struct acpi_battery *battery) +{ + int i, result = 0; + + if (battery->update_time && + time_before(jiffies, battery->update_time + + msecs_to_jiffies(cache_time))) + return 0; + for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { + result = acpi_smbus_read(battery->sbs->hc, + state_readers[i].mode, + ACPI_SBS_BATTERY, + state_readers[i].command, + (u8 *)battery + + state_readers[i].offset); + if (result) + goto end; + } + end: + battery->update_time = jiffies; + return result; +} + +static int acpi_battery_get_alarm(struct acpi_battery *battery) +{ + return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, + ACPI_SBS_BATTERY, 0x01, + (u8 *)&battery->alarm_capacity); +} + +static int acpi_battery_set_alarm(struct acpi_battery *battery) +{ + struct acpi_sbs *sbs = battery->sbs; + u16 value, sel = 1 << (battery->id + 12); + + int ret; + + + if (sbs->manager_present) { + ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, + 0x01, (u8 *)&value); + if (ret) + goto end; + if ((value & 0xf000) != sel) { + value &= 0x0fff; + value |= sel; + ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, + ACPI_SBS_MANAGER, + 0x01, (u8 *)&value, 2); + if (ret) + goto end; + } + } + ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, + 0x01, (u8 *)&battery->alarm_capacity, 2); + end: + return ret; +} + +static int acpi_ac_get_present(struct acpi_sbs *sbs) +{ + int result; + u16 status; + + result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, + 0x13, (u8 *) & status); + + if (result) + return result; + + /* + * The spec requires that bit 4 always be 1. If it's not set, assume + * that the implementation doesn't support an SBS charger. + * + * And on some MacBooks a status of 0xffff is always returned, no + * matter whether the charger is plugged in or not, which is also + * wrong, so ignore the SBS charger for those too. + */ + if (!((status >> 4) & 0x1) || status == 0xffff) + return -ENODEV; + + sbs->charger_present = (status >> 15) & 0x1; + return 0; +} + +static ssize_t acpi_battery_alarm_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); + acpi_battery_get_alarm(battery); + return sprintf(buf, "%d\n", battery->alarm_capacity * + acpi_battery_scale(battery) * 1000); +} + +static ssize_t acpi_battery_alarm_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + unsigned long x; + struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); + if (sscanf(buf, "%lu\n", &x) == 1) + battery->alarm_capacity = x / + (1000 * acpi_battery_scale(battery)); + if (battery->present) + acpi_battery_set_alarm(battery); + return count; +} + +static const struct device_attribute alarm_attr = { + .attr = {.name = "alarm", .mode = 0644}, + .show = acpi_battery_alarm_show, + .store = acpi_battery_alarm_store, +}; + +/* -------------------------------------------------------------------------- + Driver Interface + -------------------------------------------------------------------------- */ +static int acpi_battery_read(struct acpi_battery *battery) +{ + int result = 0, saved_present = battery->present; + u16 state; + + if (battery->sbs->manager_present) { + result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, + ACPI_SBS_MANAGER, 0x01, (u8 *)&state); + if (!result) + battery->present = state & (1 << battery->id); + state &= 0x0fff; + state |= 1 << (battery->id + 12); + acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, + ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); + } else if (battery->id == 0) + battery->present = 1; + + if (result || !battery->present) + return result; + + if (saved_present != battery->present) { + battery->update_time = 0; + result = acpi_battery_get_info(battery); + if (result) { + battery->present = 0; + return result; + } + } + result = acpi_battery_get_state(battery); + if (result) + battery->present = 0; + return result; +} + +/* Smart Battery */ +static int acpi_battery_add(struct acpi_sbs *sbs, int id) +{ + struct acpi_battery *battery = &sbs->battery[id]; + struct power_supply_config psy_cfg = { .drv_data = battery, }; + int result; + + battery->id = id; + battery->sbs = sbs; + result = acpi_battery_read(battery); + if (result) + return result; + + sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); + battery->bat_desc.name = battery->name; + battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; + if (!acpi_battery_mode(battery)) { + battery->bat_desc.properties = sbs_charge_battery_props; + battery->bat_desc.num_properties = + ARRAY_SIZE(sbs_charge_battery_props); + } else { + battery->bat_desc.properties = sbs_energy_battery_props; + battery->bat_desc.num_properties = + ARRAY_SIZE(sbs_energy_battery_props); + } + battery->bat_desc.get_property = acpi_sbs_battery_get_property; + battery->bat = power_supply_register(&sbs->device->dev, + &battery->bat_desc, &psy_cfg); + if (IS_ERR(battery->bat)) { + result = PTR_ERR(battery->bat); + battery->bat = NULL; + goto end; + } + + result = device_create_file(&battery->bat->dev, &alarm_attr); + if (result) + goto end; + battery->have_sysfs_alarm = 1; + end: + pr_info("%s [%s]: Battery Slot [%s] (battery %s)\n", + ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), + battery->name, battery->present ? "present" : "absent"); + return result; +} + +static void acpi_battery_remove(struct acpi_sbs *sbs, int id) +{ + struct acpi_battery *battery = &sbs->battery[id]; + + if (battery->bat) { + if (battery->have_sysfs_alarm) + device_remove_file(&battery->bat->dev, &alarm_attr); + power_supply_unregister(battery->bat); + } +} + +static int acpi_charger_add(struct acpi_sbs *sbs) +{ + int result; + struct power_supply_config psy_cfg = { .drv_data = sbs, }; + + result = acpi_ac_get_present(sbs); + if (result) + goto end; + + sbs->charger_exists = 1; + sbs->charger = power_supply_register(&sbs->device->dev, + &acpi_sbs_charger_desc, &psy_cfg); + if (IS_ERR(sbs->charger)) { + result = PTR_ERR(sbs->charger); + sbs->charger = NULL; + } + pr_info("%s [%s]: AC Adapter [%s] (%s)\n", + ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), + ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); +end: + return result; +} + +static void acpi_charger_remove(struct acpi_sbs *sbs) +{ + if (sbs->charger) + power_supply_unregister(sbs->charger); +} + +static void acpi_sbs_callback(void *context) +{ + int id; + struct acpi_sbs *sbs = context; + struct acpi_battery *bat; + u8 saved_charger_state = sbs->charger_present; + u8 saved_battery_state; + + if (sbs->charger_exists) { + acpi_ac_get_present(sbs); + if (sbs->charger_present != saved_charger_state) + kobject_uevent(&sbs->charger->dev.kobj, KOBJ_CHANGE); + } + + if (sbs->manager_present) { + for (id = 0; id < MAX_SBS_BAT; ++id) { + if (!(sbs->batteries_supported & (1 << id))) + continue; + bat = &sbs->battery[id]; + saved_battery_state = bat->present; + acpi_battery_read(bat); + if (saved_battery_state == bat->present) + continue; + kobject_uevent(&bat->bat->dev.kobj, KOBJ_CHANGE); + } + } +} + +static int acpi_sbs_add(struct acpi_device *device) +{ + struct acpi_sbs *sbs; + int result = 0; + int id; + + sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL); + if (!sbs) { + result = -ENOMEM; + goto end; + } + + mutex_init(&sbs->lock); + + sbs->hc = acpi_driver_data(acpi_dev_parent(device)); + sbs->device = device; + strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_SBS_CLASS); + device->driver_data = sbs; + + result = acpi_charger_add(sbs); + if (result && result != -ENODEV) + goto end; + + result = 0; + + if (!x86_apple_machine) { + result = acpi_manager_get_info(sbs); + if (!result) { + sbs->manager_present = 1; + for (id = 0; id < MAX_SBS_BAT; ++id) + if ((sbs->batteries_supported & (1 << id))) + acpi_battery_add(sbs, id); + } + } + + if (!sbs->manager_present) + acpi_battery_add(sbs, 0); + + acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); +end: + if (result) + acpi_sbs_remove(device); + return result; +} + +static void acpi_sbs_remove(struct acpi_device *device) +{ + struct acpi_sbs *sbs; + int id; + + if (!device) + return; + sbs = acpi_driver_data(device); + if (!sbs) + return; + mutex_lock(&sbs->lock); + acpi_smbus_unregister_callback(sbs->hc); + for (id = 0; id < MAX_SBS_BAT; ++id) + acpi_battery_remove(sbs, id); + acpi_charger_remove(sbs); + mutex_unlock(&sbs->lock); + mutex_destroy(&sbs->lock); + kfree(sbs); +} + +#ifdef CONFIG_PM_SLEEP +static int acpi_sbs_resume(struct device *dev) +{ + struct acpi_sbs *sbs; + if (!dev) + return -EINVAL; + sbs = to_acpi_device(dev)->driver_data; + acpi_sbs_callback(sbs); + return 0; +} +#else +#define acpi_sbs_resume NULL +#endif + +static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume); + +static struct acpi_driver acpi_sbs_driver = { + .name = "sbs", + .class = ACPI_SBS_CLASS, + .ids = sbs_device_ids, + .ops = { + .add = acpi_sbs_add, + .remove = acpi_sbs_remove, + }, + .drv.pm = &acpi_sbs_pm, +}; +module_acpi_driver(acpi_sbs_driver); -- cgit v1.2.3