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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/iio/light/tcs3414.c | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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().
...
Diffstat (limited to '')
-rw-r--r-- | drivers/iio/light/tcs3414.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c new file mode 100644 index 000000000..5100732fb --- /dev/null +++ b/drivers/iio/light/tcs3414.c @@ -0,0 +1,383 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * tcs3414.c - Support for TAOS TCS3414 digital color sensor + * + * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net> + * + * Digital color sensor with 16-bit channels for red, green, blue, clear); + * 7-bit I2C slave address 0x39 (TCS3414) or 0x29, 0x49, 0x59 (TCS3413, + * TCS3415, TCS3416, resp.) + * + * TODO: sync, interrupt support, thresholds, prescaler + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/pm.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/buffer.h> +#include <linux/iio/triggered_buffer.h> + +#define TCS3414_DRV_NAME "tcs3414" + +#define TCS3414_COMMAND BIT(7) +#define TCS3414_COMMAND_WORD (TCS3414_COMMAND | BIT(5)) + +#define TCS3414_CONTROL (TCS3414_COMMAND | 0x00) +#define TCS3414_TIMING (TCS3414_COMMAND | 0x01) +#define TCS3414_ID (TCS3414_COMMAND | 0x04) +#define TCS3414_GAIN (TCS3414_COMMAND | 0x07) +#define TCS3414_DATA_GREEN (TCS3414_COMMAND_WORD | 0x10) +#define TCS3414_DATA_RED (TCS3414_COMMAND_WORD | 0x12) +#define TCS3414_DATA_BLUE (TCS3414_COMMAND_WORD | 0x14) +#define TCS3414_DATA_CLEAR (TCS3414_COMMAND_WORD | 0x16) + +#define TCS3414_CONTROL_ADC_VALID BIT(4) +#define TCS3414_CONTROL_ADC_EN BIT(1) +#define TCS3414_CONTROL_POWER BIT(0) + +#define TCS3414_INTEG_MASK GENMASK(1, 0) +#define TCS3414_INTEG_12MS 0x0 +#define TCS3414_INTEG_100MS 0x1 +#define TCS3414_INTEG_400MS 0x2 + +#define TCS3414_GAIN_MASK GENMASK(5, 4) +#define TCS3414_GAIN_SHIFT 4 + +struct tcs3414_data { + struct i2c_client *client; + u8 control; + u8 gain; + u8 timing; + /* Ensure timestamp is naturally aligned */ + struct { + u16 chans[4]; + s64 timestamp __aligned(8); + } scan; +}; + +#define TCS3414_CHANNEL(_color, _si, _addr) { \ + .type = IIO_INTENSITY, \ + .modified = 1, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_INT_TIME), \ + .channel2 = IIO_MOD_LIGHT_##_color, \ + .address = _addr, \ + .scan_index = _si, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 16, \ + .storagebits = 16, \ + .endianness = IIO_CPU, \ + }, \ +} + +/* scale factors: 1/gain */ +static const int tcs3414_scales[][2] = { + {1, 0}, {0, 250000}, {0, 62500}, {0, 15625} +}; + +/* integration time in ms */ +static const int tcs3414_times[] = { 12, 100, 400 }; + +static const struct iio_chan_spec tcs3414_channels[] = { + TCS3414_CHANNEL(GREEN, 0, TCS3414_DATA_GREEN), + TCS3414_CHANNEL(RED, 1, TCS3414_DATA_RED), + TCS3414_CHANNEL(BLUE, 2, TCS3414_DATA_BLUE), + TCS3414_CHANNEL(CLEAR, 3, TCS3414_DATA_CLEAR), + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +static int tcs3414_req_data(struct tcs3414_data *data) +{ + int tries = 25; + int ret; + + ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + data->control | TCS3414_CONTROL_ADC_EN); + if (ret < 0) + return ret; + + while (tries--) { + ret = i2c_smbus_read_byte_data(data->client, TCS3414_CONTROL); + if (ret < 0) + return ret; + if (ret & TCS3414_CONTROL_ADC_VALID) + break; + msleep(20); + } + + ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + data->control); + if (ret < 0) + return ret; + + if (tries < 0) { + dev_err(&data->client->dev, "data not ready\n"); + return -EIO; + } + + return 0; +} + +static int tcs3414_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct tcs3414_data *data = iio_priv(indio_dev); + int i, ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + ret = tcs3414_req_data(data); + if (ret < 0) { + iio_device_release_direct_mode(indio_dev); + return ret; + } + ret = i2c_smbus_read_word_data(data->client, chan->address); + iio_device_release_direct_mode(indio_dev); + if (ret < 0) + return ret; + *val = ret; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + i = (data->gain & TCS3414_GAIN_MASK) >> TCS3414_GAIN_SHIFT; + *val = tcs3414_scales[i][0]; + *val2 = tcs3414_scales[i][1]; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_INT_TIME: + *val = 0; + *val2 = tcs3414_times[data->timing & TCS3414_INTEG_MASK] * 1000; + return IIO_VAL_INT_PLUS_MICRO; + } + return -EINVAL; +} + +static int tcs3414_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct tcs3414_data *data = iio_priv(indio_dev); + int i; + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + for (i = 0; i < ARRAY_SIZE(tcs3414_scales); i++) { + if (val == tcs3414_scales[i][0] && + val2 == tcs3414_scales[i][1]) { + data->gain &= ~TCS3414_GAIN_MASK; + data->gain |= i << TCS3414_GAIN_SHIFT; + return i2c_smbus_write_byte_data( + data->client, TCS3414_GAIN, + data->gain); + } + } + return -EINVAL; + case IIO_CHAN_INFO_INT_TIME: + if (val != 0) + return -EINVAL; + for (i = 0; i < ARRAY_SIZE(tcs3414_times); i++) { + if (val2 == tcs3414_times[i] * 1000) { + data->timing &= ~TCS3414_INTEG_MASK; + data->timing |= i; + return i2c_smbus_write_byte_data( + data->client, TCS3414_TIMING, + data->timing); + } + } + return -EINVAL; + default: + return -EINVAL; + } +} + +static irqreturn_t tcs3414_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct tcs3414_data *data = iio_priv(indio_dev); + int i, j = 0; + + for_each_set_bit(i, indio_dev->active_scan_mask, + indio_dev->masklength) { + int ret = i2c_smbus_read_word_data(data->client, + TCS3414_DATA_GREEN + 2*i); + if (ret < 0) + goto done; + + data->scan.chans[j++] = ret; + } + + iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, + iio_get_time_ns(indio_dev)); + +done: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static IIO_CONST_ATTR(scale_available, "1 0.25 0.0625 0.015625"); +static IIO_CONST_ATTR_INT_TIME_AVAIL("0.012 0.1 0.4"); + +static struct attribute *tcs3414_attributes[] = { + &iio_const_attr_scale_available.dev_attr.attr, + &iio_const_attr_integration_time_available.dev_attr.attr, + NULL +}; + +static const struct attribute_group tcs3414_attribute_group = { + .attrs = tcs3414_attributes, +}; + +static const struct iio_info tcs3414_info = { + .read_raw = tcs3414_read_raw, + .write_raw = tcs3414_write_raw, + .attrs = &tcs3414_attribute_group, +}; + +static int tcs3414_buffer_postenable(struct iio_dev *indio_dev) +{ + struct tcs3414_data *data = iio_priv(indio_dev); + + data->control |= TCS3414_CONTROL_ADC_EN; + return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + data->control); +} + +static int tcs3414_buffer_predisable(struct iio_dev *indio_dev) +{ + struct tcs3414_data *data = iio_priv(indio_dev); + + data->control &= ~TCS3414_CONTROL_ADC_EN; + return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + data->control); +} + +static const struct iio_buffer_setup_ops tcs3414_buffer_setup_ops = { + .postenable = tcs3414_buffer_postenable, + .predisable = tcs3414_buffer_predisable, +}; + +static int tcs3414_powerdown(struct tcs3414_data *data) +{ + return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + data->control & ~(TCS3414_CONTROL_POWER | + TCS3414_CONTROL_ADC_EN)); +} + +static void tcs3414_powerdown_cleanup(void *data) +{ + tcs3414_powerdown(data); +} + +static int tcs3414_probe(struct i2c_client *client) +{ + struct tcs3414_data *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (indio_dev == NULL) + return -ENOMEM; + + data = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client = client; + + indio_dev->info = &tcs3414_info; + indio_dev->name = TCS3414_DRV_NAME; + indio_dev->channels = tcs3414_channels; + indio_dev->num_channels = ARRAY_SIZE(tcs3414_channels); + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = i2c_smbus_read_byte_data(data->client, TCS3414_ID); + if (ret < 0) + return ret; + + switch (ret & 0xf0) { + case 0x00: + dev_info(&client->dev, "TCS3404 found\n"); + break; + case 0x10: + dev_info(&client->dev, "TCS3413/14/15/16 found\n"); + break; + default: + return -ENODEV; + } + + data->control = TCS3414_CONTROL_POWER; + ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + data->control); + if (ret < 0) + return ret; + + ret = devm_add_action_or_reset(&client->dev, tcs3414_powerdown_cleanup, + data); + if (ret < 0) + return ret; + + data->timing = TCS3414_INTEG_12MS; /* free running */ + ret = i2c_smbus_write_byte_data(data->client, TCS3414_TIMING, + data->timing); + if (ret < 0) + return ret; + + ret = i2c_smbus_read_byte_data(data->client, TCS3414_GAIN); + if (ret < 0) + return ret; + data->gain = ret; + + ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL, + tcs3414_trigger_handler, &tcs3414_buffer_setup_ops); + if (ret < 0) + return ret; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static int tcs3414_suspend(struct device *dev) +{ + struct tcs3414_data *data = iio_priv(i2c_get_clientdata( + to_i2c_client(dev))); + return tcs3414_powerdown(data); +} + +static int tcs3414_resume(struct device *dev) +{ + struct tcs3414_data *data = iio_priv(i2c_get_clientdata( + to_i2c_client(dev))); + return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL, + data->control); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(tcs3414_pm_ops, tcs3414_suspend, + tcs3414_resume); + +static const struct i2c_device_id tcs3414_id[] = { + { "tcs3414", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tcs3414_id); + +static struct i2c_driver tcs3414_driver = { + .driver = { + .name = TCS3414_DRV_NAME, + .pm = pm_sleep_ptr(&tcs3414_pm_ops), + }, + .probe_new = tcs3414_probe, + .id_table = tcs3414_id, +}; +module_i2c_driver(tcs3414_driver); + +MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>"); +MODULE_DESCRIPTION("TCS3414 digital color sensors driver"); +MODULE_LICENSE("GPL"); |