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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/input/keyboard/tca8418_keypad.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 'drivers/input/keyboard/tca8418_keypad.c')
-rw-r--r-- | drivers/input/keyboard/tca8418_keypad.c | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/drivers/input/keyboard/tca8418_keypad.c b/drivers/input/keyboard/tca8418_keypad.c new file mode 100644 index 000000000..3d7492f38 --- /dev/null +++ b/drivers/input/keyboard/tca8418_keypad.c @@ -0,0 +1,391 @@ +/* + * Driver for TCA8418 I2C keyboard + * + * Copyright (C) 2011 Fuel7, Inc. All rights reserved. + * + * Author: Kyle Manna <kyle.manna@fuel7.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + * + * If you can't comply with GPLv2, alternative licensing terms may be + * arranged. Please contact Fuel7, Inc. (http://fuel7.com/) for proprietary + * alternative licensing inquiries. + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/input/matrix_keypad.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/property.h> +#include <linux/slab.h> +#include <linux/types.h> + +/* TCA8418 hardware limits */ +#define TCA8418_MAX_ROWS 8 +#define TCA8418_MAX_COLS 10 + +/* TCA8418 register offsets */ +#define REG_CFG 0x01 +#define REG_INT_STAT 0x02 +#define REG_KEY_LCK_EC 0x03 +#define REG_KEY_EVENT_A 0x04 +#define REG_KEY_EVENT_B 0x05 +#define REG_KEY_EVENT_C 0x06 +#define REG_KEY_EVENT_D 0x07 +#define REG_KEY_EVENT_E 0x08 +#define REG_KEY_EVENT_F 0x09 +#define REG_KEY_EVENT_G 0x0A +#define REG_KEY_EVENT_H 0x0B +#define REG_KEY_EVENT_I 0x0C +#define REG_KEY_EVENT_J 0x0D +#define REG_KP_LCK_TIMER 0x0E +#define REG_UNLOCK1 0x0F +#define REG_UNLOCK2 0x10 +#define REG_GPIO_INT_STAT1 0x11 +#define REG_GPIO_INT_STAT2 0x12 +#define REG_GPIO_INT_STAT3 0x13 +#define REG_GPIO_DAT_STAT1 0x14 +#define REG_GPIO_DAT_STAT2 0x15 +#define REG_GPIO_DAT_STAT3 0x16 +#define REG_GPIO_DAT_OUT1 0x17 +#define REG_GPIO_DAT_OUT2 0x18 +#define REG_GPIO_DAT_OUT3 0x19 +#define REG_GPIO_INT_EN1 0x1A +#define REG_GPIO_INT_EN2 0x1B +#define REG_GPIO_INT_EN3 0x1C +#define REG_KP_GPIO1 0x1D +#define REG_KP_GPIO2 0x1E +#define REG_KP_GPIO3 0x1F +#define REG_GPI_EM1 0x20 +#define REG_GPI_EM2 0x21 +#define REG_GPI_EM3 0x22 +#define REG_GPIO_DIR1 0x23 +#define REG_GPIO_DIR2 0x24 +#define REG_GPIO_DIR3 0x25 +#define REG_GPIO_INT_LVL1 0x26 +#define REG_GPIO_INT_LVL2 0x27 +#define REG_GPIO_INT_LVL3 0x28 +#define REG_DEBOUNCE_DIS1 0x29 +#define REG_DEBOUNCE_DIS2 0x2A +#define REG_DEBOUNCE_DIS3 0x2B +#define REG_GPIO_PULL1 0x2C +#define REG_GPIO_PULL2 0x2D +#define REG_GPIO_PULL3 0x2E + +/* TCA8418 bit definitions */ +#define CFG_AI BIT(7) +#define CFG_GPI_E_CFG BIT(6) +#define CFG_OVR_FLOW_M BIT(5) +#define CFG_INT_CFG BIT(4) +#define CFG_OVR_FLOW_IEN BIT(3) +#define CFG_K_LCK_IEN BIT(2) +#define CFG_GPI_IEN BIT(1) +#define CFG_KE_IEN BIT(0) + +#define INT_STAT_CAD_INT BIT(4) +#define INT_STAT_OVR_FLOW_INT BIT(3) +#define INT_STAT_K_LCK_INT BIT(2) +#define INT_STAT_GPI_INT BIT(1) +#define INT_STAT_K_INT BIT(0) + +/* TCA8418 register masks */ +#define KEY_LCK_EC_KEC 0x7 +#define KEY_EVENT_CODE 0x7f +#define KEY_EVENT_VALUE 0x80 + +struct tca8418_keypad { + struct i2c_client *client; + struct input_dev *input; + + unsigned int row_shift; +}; + +/* + * Write a byte to the TCA8418 + */ +static int tca8418_write_byte(struct tca8418_keypad *keypad_data, + int reg, u8 val) +{ + int error; + + error = i2c_smbus_write_byte_data(keypad_data->client, reg, val); + if (error < 0) { + dev_err(&keypad_data->client->dev, + "%s failed, reg: %d, val: %d, error: %d\n", + __func__, reg, val, error); + return error; + } + + return 0; +} + +/* + * Read a byte from the TCA8418 + */ +static int tca8418_read_byte(struct tca8418_keypad *keypad_data, + int reg, u8 *val) +{ + int error; + + error = i2c_smbus_read_byte_data(keypad_data->client, reg); + if (error < 0) { + dev_err(&keypad_data->client->dev, + "%s failed, reg: %d, error: %d\n", + __func__, reg, error); + return error; + } + + *val = (u8)error; + + return 0; +} + +static void tca8418_read_keypad(struct tca8418_keypad *keypad_data) +{ + struct input_dev *input = keypad_data->input; + unsigned short *keymap = input->keycode; + int error, col, row; + u8 reg, state, code; + + do { + error = tca8418_read_byte(keypad_data, REG_KEY_EVENT_A, ®); + if (error < 0) { + dev_err(&keypad_data->client->dev, + "unable to read REG_KEY_EVENT_A\n"); + break; + } + + /* Assume that key code 0 signifies empty FIFO */ + if (reg <= 0) + break; + + state = reg & KEY_EVENT_VALUE; + code = reg & KEY_EVENT_CODE; + + row = code / TCA8418_MAX_COLS; + col = code % TCA8418_MAX_COLS; + + row = (col) ? row : row - 1; + col = (col) ? col - 1 : TCA8418_MAX_COLS - 1; + + code = MATRIX_SCAN_CODE(row, col, keypad_data->row_shift); + input_event(input, EV_MSC, MSC_SCAN, code); + input_report_key(input, keymap[code], state); + + } while (1); + + input_sync(input); +} + +/* + * Threaded IRQ handler and this can (and will) sleep. + */ +static irqreturn_t tca8418_irq_handler(int irq, void *dev_id) +{ + struct tca8418_keypad *keypad_data = dev_id; + u8 reg; + int error; + + error = tca8418_read_byte(keypad_data, REG_INT_STAT, ®); + if (error) { + dev_err(&keypad_data->client->dev, + "unable to read REG_INT_STAT\n"); + return IRQ_NONE; + } + + if (!reg) + return IRQ_NONE; + + if (reg & INT_STAT_OVR_FLOW_INT) + dev_warn(&keypad_data->client->dev, "overflow occurred\n"); + + if (reg & INT_STAT_K_INT) + tca8418_read_keypad(keypad_data); + + /* Clear all interrupts, even IRQs we didn't check (GPI, CAD, LCK) */ + reg = 0xff; + error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg); + if (error) + dev_err(&keypad_data->client->dev, + "unable to clear REG_INT_STAT\n"); + + return IRQ_HANDLED; +} + +/* + * Configure the TCA8418 for keypad operation + */ +static int tca8418_configure(struct tca8418_keypad *keypad_data, + u32 rows, u32 cols) +{ + int reg, error = 0; + + /* Assemble a mask for row and column registers */ + reg = ~(~0 << rows); + reg += (~(~0 << cols)) << 8; + + /* Set registers to keypad mode */ + error |= tca8418_write_byte(keypad_data, REG_KP_GPIO1, reg); + error |= tca8418_write_byte(keypad_data, REG_KP_GPIO2, reg >> 8); + error |= tca8418_write_byte(keypad_data, REG_KP_GPIO3, reg >> 16); + + /* Enable column debouncing */ + error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS1, reg); + error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS2, reg >> 8); + error |= tca8418_write_byte(keypad_data, REG_DEBOUNCE_DIS3, reg >> 16); + + if (error) + return error; + + error = tca8418_write_byte(keypad_data, REG_CFG, + CFG_INT_CFG | CFG_OVR_FLOW_IEN | CFG_KE_IEN); + + return error; +} + +static int tca8418_keypad_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct tca8418_keypad *keypad_data; + struct input_dev *input; + u32 rows = 0, cols = 0; + int error, row_shift; + u8 reg; + + /* Check i2c driver capabilities */ + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)) { + dev_err(dev, "%s adapter not supported\n", + dev_driver_string(&client->adapter->dev)); + return -ENODEV; + } + + error = matrix_keypad_parse_properties(dev, &rows, &cols); + if (error) + return error; + + if (!rows || rows > TCA8418_MAX_ROWS) { + dev_err(dev, "invalid rows\n"); + return -EINVAL; + } + + if (!cols || cols > TCA8418_MAX_COLS) { + dev_err(dev, "invalid columns\n"); + return -EINVAL; + } + + row_shift = get_count_order(cols); + + /* Allocate memory for keypad_data and input device */ + keypad_data = devm_kzalloc(dev, sizeof(*keypad_data), GFP_KERNEL); + if (!keypad_data) + return -ENOMEM; + + keypad_data->client = client; + keypad_data->row_shift = row_shift; + + /* Read key lock register, if this fails assume device not present */ + error = tca8418_read_byte(keypad_data, REG_KEY_LCK_EC, ®); + if (error) + return -ENODEV; + + /* Configure input device */ + input = devm_input_allocate_device(dev); + if (!input) + return -ENOMEM; + + keypad_data->input = input; + + input->name = client->name; + input->id.bustype = BUS_I2C; + input->id.vendor = 0x0001; + input->id.product = 0x001; + input->id.version = 0x0001; + + error = matrix_keypad_build_keymap(NULL, NULL, rows, cols, NULL, input); + if (error) { + dev_err(dev, "Failed to build keymap\n"); + return error; + } + + if (device_property_read_bool(dev, "keypad,autorepeat")) + __set_bit(EV_REP, input->evbit); + + input_set_capability(input, EV_MSC, MSC_SCAN); + + error = devm_request_threaded_irq(dev, client->irq, + NULL, tca8418_irq_handler, + IRQF_SHARED | IRQF_ONESHOT, + client->name, keypad_data); + if (error) { + dev_err(dev, "Unable to claim irq %d; error %d\n", + client->irq, error); + return error; + } + + /* Initialize the chip */ + error = tca8418_configure(keypad_data, rows, cols); + if (error < 0) + return error; + + error = input_register_device(input); + if (error) { + dev_err(dev, "Unable to register input device, error: %d\n", + error); + return error; + } + + return 0; +} + +static const struct i2c_device_id tca8418_id[] = { + { "tca8418", 8418, }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tca8418_id); + +static const struct of_device_id tca8418_dt_ids[] = { + { .compatible = "ti,tca8418", }, + { } +}; +MODULE_DEVICE_TABLE(of, tca8418_dt_ids); + +static struct i2c_driver tca8418_keypad_driver = { + .driver = { + .name = "tca8418_keypad", + .of_match_table = tca8418_dt_ids, + }, + .probe_new = tca8418_keypad_probe, + .id_table = tca8418_id, +}; + +static int __init tca8418_keypad_init(void) +{ + return i2c_add_driver(&tca8418_keypad_driver); +} +subsys_initcall(tca8418_keypad_init); + +static void __exit tca8418_keypad_exit(void) +{ + i2c_del_driver(&tca8418_keypad_driver); +} +module_exit(tca8418_keypad_exit); + +MODULE_AUTHOR("Kyle Manna <kyle.manna@fuel7.com>"); +MODULE_DESCRIPTION("Keypad driver for TCA8418"); +MODULE_LICENSE("GPL"); |