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/leds/leds-lp5523.c | 996 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 996 insertions(+) create mode 100644 drivers/leds/leds-lp5523.c (limited to 'drivers/leds/leds-lp5523.c') diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c new file mode 100644 index 000000000..e08e3de14 --- /dev/null +++ b/drivers/leds/leds-lp5523.c @@ -0,0 +1,996 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * lp5523.c - LP5523, LP55231 LED Driver + * + * Copyright (C) 2010 Nokia Corporation + * Copyright (C) 2012 Texas Instruments + * + * Contact: Samu Onkalo + * Milo(Woogyom) Kim + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "leds-lp55xx-common.h" + +#define LP5523_PROGRAM_LENGTH 32 /* bytes */ +/* Memory is used like this: + * 0x00 engine 1 program + * 0x10 engine 2 program + * 0x20 engine 3 program + * 0x30 engine 1 muxing info + * 0x40 engine 2 muxing info + * 0x50 engine 3 muxing info + */ +#define LP5523_MAX_LEDS 9 + +/* Registers */ +#define LP5523_REG_ENABLE 0x00 +#define LP5523_REG_OP_MODE 0x01 +#define LP5523_REG_ENABLE_LEDS_MSB 0x04 +#define LP5523_REG_ENABLE_LEDS_LSB 0x05 +#define LP5523_REG_LED_CTRL_BASE 0x06 +#define LP5523_REG_LED_PWM_BASE 0x16 +#define LP5523_REG_LED_CURRENT_BASE 0x26 +#define LP5523_REG_CONFIG 0x36 +#define LP5523_REG_STATUS 0x3A +#define LP5523_REG_RESET 0x3D +#define LP5523_REG_LED_TEST_CTRL 0x41 +#define LP5523_REG_LED_TEST_ADC 0x42 +#define LP5523_REG_MASTER_FADER_BASE 0x48 +#define LP5523_REG_CH1_PROG_START 0x4C +#define LP5523_REG_CH2_PROG_START 0x4D +#define LP5523_REG_CH3_PROG_START 0x4E +#define LP5523_REG_PROG_PAGE_SEL 0x4F +#define LP5523_REG_PROG_MEM 0x50 + +/* Bit description in registers */ +#define LP5523_ENABLE 0x40 +#define LP5523_AUTO_INC 0x40 +#define LP5523_PWR_SAVE 0x20 +#define LP5523_PWM_PWR_SAVE 0x04 +#define LP5523_CP_AUTO 0x18 +#define LP5523_AUTO_CLK 0x02 + +#define LP5523_EN_LEDTEST 0x80 +#define LP5523_LEDTEST_DONE 0x80 +#define LP5523_RESET 0xFF +#define LP5523_ADC_SHORTCIRC_LIM 80 +#define LP5523_EXT_CLK_USED 0x08 +#define LP5523_ENG_STATUS_MASK 0x07 + +#define LP5523_FADER_MAPPING_MASK 0xC0 +#define LP5523_FADER_MAPPING_SHIFT 6 + +/* Memory Page Selection */ +#define LP5523_PAGE_ENG1 0 +#define LP5523_PAGE_ENG2 1 +#define LP5523_PAGE_ENG3 2 +#define LP5523_PAGE_MUX1 3 +#define LP5523_PAGE_MUX2 4 +#define LP5523_PAGE_MUX3 5 + +/* Program Memory Operations */ +#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */ +#define LP5523_MODE_ENG2_M 0x0C +#define LP5523_MODE_ENG3_M 0x03 +#define LP5523_LOAD_ENG1 0x10 +#define LP5523_LOAD_ENG2 0x04 +#define LP5523_LOAD_ENG3 0x01 + +#define LP5523_ENG1_IS_LOADING(mode) \ + ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1) +#define LP5523_ENG2_IS_LOADING(mode) \ + ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2) +#define LP5523_ENG3_IS_LOADING(mode) \ + ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3) + +#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */ +#define LP5523_EXEC_ENG2_M 0x0C +#define LP5523_EXEC_ENG3_M 0x03 +#define LP5523_EXEC_M 0x3F +#define LP5523_RUN_ENG1 0x20 +#define LP5523_RUN_ENG2 0x08 +#define LP5523_RUN_ENG3 0x02 + +#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) + +enum lp5523_chip_id { + LP5523, + LP55231, +}; + +static int lp5523_init_program_engine(struct lp55xx_chip *chip); + +static inline void lp5523_wait_opmode_done(void) +{ + usleep_range(1000, 2000); +} + +static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current) +{ + led->led_current = led_current; + lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, + led_current); +} + +static int lp5523_post_init_device(struct lp55xx_chip *chip) +{ + int ret; + + ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE); + if (ret) + return ret; + + /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ + usleep_range(1000, 2000); + + ret = lp55xx_write(chip, LP5523_REG_CONFIG, + LP5523_AUTO_INC | LP5523_PWR_SAVE | + LP5523_CP_AUTO | LP5523_AUTO_CLK | + LP5523_PWM_PWR_SAVE); + if (ret) + return ret; + + /* turn on all leds */ + ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01); + if (ret) + return ret; + + ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff); + if (ret) + return ret; + + return lp5523_init_program_engine(chip); +} + +static void lp5523_load_engine(struct lp55xx_chip *chip) +{ + enum lp55xx_engine_index idx = chip->engine_idx; + static const u8 mask[] = { + [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, + [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, + [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, + }; + + static const u8 val[] = { + [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1, + [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2, + [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3, + }; + + lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]); + + lp5523_wait_opmode_done(); +} + +static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) +{ + enum lp55xx_engine_index idx = chip->engine_idx; + static const u8 page_sel[] = { + [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1, + [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2, + [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3, + }; + + lp5523_load_engine(chip); + + lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); +} + +static void lp5523_stop_all_engines(struct lp55xx_chip *chip) +{ + lp55xx_write(chip, LP5523_REG_OP_MODE, 0); + lp5523_wait_opmode_done(); +} + +static void lp5523_stop_engine(struct lp55xx_chip *chip) +{ + enum lp55xx_engine_index idx = chip->engine_idx; + static const u8 mask[] = { + [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, + [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, + [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, + }; + + lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0); + + lp5523_wait_opmode_done(); +} + +static void lp5523_turn_off_channels(struct lp55xx_chip *chip) +{ + int i; + + for (i = 0; i < LP5523_MAX_LEDS; i++) + lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0); +} + +static void lp5523_run_engine(struct lp55xx_chip *chip, bool start) +{ + int ret; + u8 mode; + u8 exec; + + /* stop engine */ + if (!start) { + lp5523_stop_engine(chip); + lp5523_turn_off_channels(chip); + return; + } + + /* + * To run the engine, + * operation mode and enable register should updated at the same time + */ + + ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode); + if (ret) + return; + + ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec); + if (ret) + return; + + /* change operation mode to RUN only when each engine is loading */ + if (LP5523_ENG1_IS_LOADING(mode)) { + mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1; + exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1; + } + + if (LP5523_ENG2_IS_LOADING(mode)) { + mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2; + exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2; + } + + if (LP5523_ENG3_IS_LOADING(mode)) { + mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3; + exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3; + } + + lp55xx_write(chip, LP5523_REG_OP_MODE, mode); + lp5523_wait_opmode_done(); + + lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec); +} + +static int lp5523_init_program_engine(struct lp55xx_chip *chip) +{ + int i; + int j; + int ret; + u8 status; + /* one pattern per engine setting LED MUX start and stop addresses */ + static const u8 pattern[][LP5523_PROGRAM_LENGTH] = { + { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, + { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, + { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, + }; + + /* hardcode 32 bytes of memory for each engine from program memory */ + ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00); + if (ret) + return ret; + + ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10); + if (ret) + return ret; + + ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20); + if (ret) + return ret; + + /* write LED MUX address space for each engine */ + for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { + chip->engine_idx = i; + lp5523_load_engine_and_select_page(chip); + + for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) { + ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j, + pattern[i - 1][j]); + if (ret) + goto out; + } + } + + lp5523_run_engine(chip, true); + + /* Let the programs run for couple of ms and check the engine status */ + usleep_range(3000, 6000); + ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); + if (ret) + goto out; + status &= LP5523_ENG_STATUS_MASK; + + if (status != LP5523_ENG_STATUS_MASK) { + dev_err(&chip->cl->dev, + "could not configure LED engine, status = 0x%.2x\n", + status); + ret = -1; + } + +out: + lp5523_stop_all_engines(chip); + return ret; +} + +static int lp5523_update_program_memory(struct lp55xx_chip *chip, + const u8 *data, size_t size) +{ + u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; + unsigned int cmd; + char c[3]; + int nrchars; + int ret; + int offset = 0; + int i = 0; + + while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) { + /* separate sscanfs because length is working only for %s */ + ret = sscanf(data + offset, "%2s%n ", c, &nrchars); + if (ret != 1) + goto err; + + ret = sscanf(c, "%2x", &cmd); + if (ret != 1) + goto err; + + pattern[i] = (u8)cmd; + offset += nrchars; + i++; + } + + /* Each instruction is 16bit long. Check that length is even */ + if (i % 2) + goto err; + + for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { + ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); + if (ret) + return -EINVAL; + } + + return size; + +err: + dev_err(&chip->cl->dev, "wrong pattern format\n"); + return -EINVAL; +} + +static void lp5523_firmware_loaded(struct lp55xx_chip *chip) +{ + const struct firmware *fw = chip->fw; + + if (fw->size > LP5523_PROGRAM_LENGTH) { + dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", + fw->size); + return; + } + + /* + * Program memory sequence + * 1) set engine mode to "LOAD" + * 2) write firmware data into program memory + */ + + lp5523_load_engine_and_select_page(chip); + lp5523_update_program_memory(chip, fw->data, fw->size); +} + +static ssize_t show_engine_mode(struct device *dev, + struct device_attribute *attr, + char *buf, int nr) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; + + switch (mode) { + case LP55XX_ENGINE_RUN: + return sprintf(buf, "run\n"); + case LP55XX_ENGINE_LOAD: + return sprintf(buf, "load\n"); + case LP55XX_ENGINE_DISABLED: + default: + return sprintf(buf, "disabled\n"); + } +} +show_mode(1) +show_mode(2) +show_mode(3) + +static ssize_t store_engine_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + struct lp55xx_engine *engine = &chip->engines[nr - 1]; + + mutex_lock(&chip->lock); + + chip->engine_idx = nr; + + if (!strncmp(buf, "run", 3)) { + lp5523_run_engine(chip, true); + engine->mode = LP55XX_ENGINE_RUN; + } else if (!strncmp(buf, "load", 4)) { + lp5523_stop_engine(chip); + lp5523_load_engine(chip); + engine->mode = LP55XX_ENGINE_LOAD; + } else if (!strncmp(buf, "disabled", 8)) { + lp5523_stop_engine(chip); + engine->mode = LP55XX_ENGINE_DISABLED; + } + + mutex_unlock(&chip->lock); + + return len; +} +store_mode(1) +store_mode(2) +store_mode(3) + +static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) +{ + u16 tmp_mux = 0; + int i; + + len = min_t(int, len, LP5523_MAX_LEDS); + + for (i = 0; i < len; i++) { + switch (buf[i]) { + case '1': + tmp_mux |= (1 << i); + break; + case '0': + break; + case '\n': + i = len; + break; + default: + return -1; + } + } + *mux = tmp_mux; + + return 0; +} + +static void lp5523_mux_to_array(u16 led_mux, char *array) +{ + int i, pos = 0; + + for (i = 0; i < LP5523_MAX_LEDS; i++) + pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); + + array[pos] = '\0'; +} + +static ssize_t show_engine_leds(struct device *dev, + struct device_attribute *attr, + char *buf, int nr) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + char mux[LP5523_MAX_LEDS + 1]; + + lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); + + return sprintf(buf, "%s\n", mux); +} +show_leds(1) +show_leds(2) +show_leds(3) + +static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr) +{ + struct lp55xx_engine *engine = &chip->engines[nr - 1]; + int ret; + static const u8 mux_page[] = { + [LP55XX_ENGINE_1] = LP5523_PAGE_MUX1, + [LP55XX_ENGINE_2] = LP5523_PAGE_MUX2, + [LP55XX_ENGINE_3] = LP5523_PAGE_MUX3, + }; + + lp5523_load_engine(chip); + + ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]); + if (ret) + return ret; + + ret = lp55xx_write(chip, LP5523_REG_PROG_MEM, (u8)(mux >> 8)); + if (ret) + return ret; + + ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux)); + if (ret) + return ret; + + engine->led_mux = mux; + return 0; +} + +static ssize_t store_engine_leds(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + struct lp55xx_engine *engine = &chip->engines[nr - 1]; + u16 mux = 0; + ssize_t ret; + + if (lp5523_mux_parse(buf, &mux, len)) + return -EINVAL; + + mutex_lock(&chip->lock); + + chip->engine_idx = nr; + ret = -EINVAL; + + if (engine->mode != LP55XX_ENGINE_LOAD) + goto leave; + + if (lp5523_load_mux(chip, mux, nr)) + goto leave; + + ret = len; +leave: + mutex_unlock(&chip->lock); + return ret; +} +store_leds(1) +store_leds(2) +store_leds(3) + +static ssize_t store_engine_load(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + int ret; + + mutex_lock(&chip->lock); + + chip->engine_idx = nr; + lp5523_load_engine_and_select_page(chip); + ret = lp5523_update_program_memory(chip, buf, len); + + mutex_unlock(&chip->lock); + + return ret; +} +store_load(1) +store_load(2) +store_load(3) + +static ssize_t lp5523_selftest(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + struct lp55xx_platform_data *pdata = chip->pdata; + int ret, pos = 0; + u8 status, adc, vdd, i; + + mutex_lock(&chip->lock); + + ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); + if (ret < 0) + goto fail; + + /* Check that ext clock is really in use if requested */ + if (pdata->clock_mode == LP55XX_CLOCK_EXT) { + if ((status & LP5523_EXT_CLK_USED) == 0) + goto fail; + } + + /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ + lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16); + usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ + ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); + if (ret < 0) + goto fail; + + if (!(status & LP5523_LEDTEST_DONE)) + usleep_range(3000, 6000); /* Was not ready. Wait little bit */ + + ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd); + if (ret < 0) + goto fail; + + vdd--; /* There may be some fluctuation in measurement */ + + for (i = 0; i < pdata->num_channels; i++) { + /* Skip disabled channels */ + if (pdata->led_config[i].led_current == 0) + continue; + + /* Set default current */ + lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, + pdata->led_config[i].led_current); + + lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, + 0xff); + /* let current stabilize 2 - 4ms before measurements start */ + usleep_range(2000, 4000); + lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, + LP5523_EN_LEDTEST | led->chan_nr); + /* ADC conversion time is 2.7 ms typically */ + usleep_range(3000, 6000); + ret = lp55xx_read(chip, LP5523_REG_STATUS, &status); + if (ret < 0) + goto fail; + + if (!(status & LP5523_LEDTEST_DONE)) + usleep_range(3000, 6000); /* Was not ready. Wait. */ + + ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc); + if (ret < 0) + goto fail; + + if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) + pos += sprintf(buf + pos, "LED %d FAIL\n", + led->chan_nr); + + lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, + 0x00); + + /* Restore current */ + lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr, + led->led_current); + led++; + } + if (pos == 0) + pos = sprintf(buf, "OK\n"); + goto release_lock; +fail: + pos = sprintf(buf, "FAIL\n"); + +release_lock: + mutex_unlock(&chip->lock); + + return pos; +} + +#define show_fader(nr) \ +static ssize_t show_master_fader##nr(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return show_master_fader(dev, attr, buf, nr); \ +} + +#define store_fader(nr) \ +static ssize_t store_master_fader##nr(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_master_fader(dev, attr, buf, len, nr); \ +} + +static ssize_t show_master_fader(struct device *dev, + struct device_attribute *attr, + char *buf, int nr) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + int ret; + u8 val; + + mutex_lock(&chip->lock); + ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val); + mutex_unlock(&chip->lock); + + if (ret == 0) + ret = sprintf(buf, "%u\n", val); + + return ret; +} +show_fader(1) +show_fader(2) +show_fader(3) + +static ssize_t store_master_fader(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + int ret; + unsigned long val; + + if (kstrtoul(buf, 0, &val)) + return -EINVAL; + + if (val > 0xff) + return -EINVAL; + + mutex_lock(&chip->lock); + ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, + (u8)val); + mutex_unlock(&chip->lock); + + if (ret == 0) + ret = len; + + return ret; +} +store_fader(1) +store_fader(2) +store_fader(3) + +static ssize_t show_master_fader_leds(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + int i, ret, pos = 0; + u8 val; + + mutex_lock(&chip->lock); + + for (i = 0; i < LP5523_MAX_LEDS; i++) { + ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val); + if (ret) + goto leave; + + val = (val & LP5523_FADER_MAPPING_MASK) + >> LP5523_FADER_MAPPING_SHIFT; + if (val > 3) { + ret = -EINVAL; + goto leave; + } + buf[pos++] = val + '0'; + } + buf[pos++] = '\n'; + ret = pos; +leave: + mutex_unlock(&chip->lock); + return ret; +} + +static ssize_t store_master_fader_leds(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); + struct lp55xx_chip *chip = led->chip; + int i, n, ret; + u8 val; + + n = min_t(int, len, LP5523_MAX_LEDS); + + mutex_lock(&chip->lock); + + for (i = 0; i < n; i++) { + if (buf[i] >= '0' && buf[i] <= '3') { + val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT; + ret = lp55xx_update_bits(chip, + LP5523_REG_LED_CTRL_BASE + i, + LP5523_FADER_MAPPING_MASK, + val); + if (ret) + goto leave; + } else { + ret = -EINVAL; + goto leave; + } + } + ret = len; +leave: + mutex_unlock(&chip->lock); + return ret; +} + +static int lp5523_multicolor_brightness(struct lp55xx_led *led) +{ + struct lp55xx_chip *chip = led->chip; + int ret; + int i; + + mutex_lock(&chip->lock); + for (i = 0; i < led->mc_cdev.num_colors; i++) { + ret = lp55xx_write(chip, + LP5523_REG_LED_PWM_BASE + + led->mc_cdev.subled_info[i].channel, + led->mc_cdev.subled_info[i].brightness); + if (ret) + break; + } + mutex_unlock(&chip->lock); + return ret; +} + +static int lp5523_led_brightness(struct lp55xx_led *led) +{ + struct lp55xx_chip *chip = led->chip; + int ret; + + mutex_lock(&chip->lock); + ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr, + led->brightness); + mutex_unlock(&chip->lock); + return ret; +} + +static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); +static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); +static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); +static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds); +static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds); +static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds); +static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); +static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); +static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); +static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest); +static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1, + store_master_fader1); +static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2, + store_master_fader2); +static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3, + store_master_fader3); +static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds, + store_master_fader_leds); + +static struct attribute *lp5523_attributes[] = { + &dev_attr_engine1_mode.attr, + &dev_attr_engine2_mode.attr, + &dev_attr_engine3_mode.attr, + &dev_attr_engine1_load.attr, + &dev_attr_engine2_load.attr, + &dev_attr_engine3_load.attr, + &dev_attr_engine1_leds.attr, + &dev_attr_engine2_leds.attr, + &dev_attr_engine3_leds.attr, + &dev_attr_selftest.attr, + &dev_attr_master_fader1.attr, + &dev_attr_master_fader2.attr, + &dev_attr_master_fader3.attr, + &dev_attr_master_fader_leds.attr, + NULL, +}; + +static const struct attribute_group lp5523_group = { + .attrs = lp5523_attributes, +}; + +/* Chip specific configurations */ +static struct lp55xx_device_config lp5523_cfg = { + .reset = { + .addr = LP5523_REG_RESET, + .val = LP5523_RESET, + }, + .enable = { + .addr = LP5523_REG_ENABLE, + .val = LP5523_ENABLE, + }, + .max_channel = LP5523_MAX_LEDS, + .post_init_device = lp5523_post_init_device, + .brightness_fn = lp5523_led_brightness, + .multicolor_brightness_fn = lp5523_multicolor_brightness, + .set_led_current = lp5523_set_led_current, + .firmware_cb = lp5523_firmware_loaded, + .run_engine = lp5523_run_engine, + .dev_attr_group = &lp5523_group, +}; + +static int lp5523_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct lp55xx_chip *chip; + struct lp55xx_led *led; + struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev); + struct device_node *np = dev_of_node(&client->dev); + + chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->cfg = &lp5523_cfg; + + if (!pdata) { + if (np) { + pdata = lp55xx_of_populate_pdata(&client->dev, np, + chip); + if (IS_ERR(pdata)) + return PTR_ERR(pdata); + } else { + dev_err(&client->dev, "no platform data\n"); + return -EINVAL; + } + } + + led = devm_kcalloc(&client->dev, + pdata->num_channels, sizeof(*led), GFP_KERNEL); + if (!led) + return -ENOMEM; + + chip->cl = client; + chip->pdata = pdata; + + mutex_init(&chip->lock); + + i2c_set_clientdata(client, led); + + ret = lp55xx_init_device(chip); + if (ret) + goto err_init; + + dev_info(&client->dev, "%s Programmable led chip found\n", id->name); + + ret = lp55xx_register_leds(led, chip); + if (ret) + goto err_out; + + ret = lp55xx_register_sysfs(chip); + if (ret) { + dev_err(&client->dev, "registering sysfs failed\n"); + goto err_out; + } + + return 0; + +err_out: + lp55xx_deinit_device(chip); +err_init: + return ret; +} + +static void lp5523_remove(struct i2c_client *client) +{ + struct lp55xx_led *led = i2c_get_clientdata(client); + struct lp55xx_chip *chip = led->chip; + + lp5523_stop_all_engines(chip); + lp55xx_unregister_sysfs(chip); + lp55xx_deinit_device(chip); +} + +static const struct i2c_device_id lp5523_id[] = { + { "lp5523", LP5523 }, + { "lp55231", LP55231 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, lp5523_id); + +#ifdef CONFIG_OF +static const struct of_device_id of_lp5523_leds_match[] = { + { .compatible = "national,lp5523", }, + { .compatible = "ti,lp55231", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, of_lp5523_leds_match); +#endif + +static struct i2c_driver lp5523_driver = { + .driver = { + .name = "lp5523x", + .of_match_table = of_match_ptr(of_lp5523_leds_match), + }, + .probe = lp5523_probe, + .remove = lp5523_remove, + .id_table = lp5523_id, +}; + +module_i2c_driver(lp5523_driver); + +MODULE_AUTHOR("Mathias Nyman "); +MODULE_AUTHOR("Milo Kim "); +MODULE_DESCRIPTION("LP5523 LED engine"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3