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/pwm/pwm-bcm-iproc.c | 271 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 271 insertions(+) create mode 100644 drivers/pwm/pwm-bcm-iproc.c (limited to 'drivers/pwm/pwm-bcm-iproc.c') diff --git a/drivers/pwm/pwm-bcm-iproc.c b/drivers/pwm/pwm-bcm-iproc.c new file mode 100644 index 000000000..97ec131eb --- /dev/null +++ b/drivers/pwm/pwm-bcm-iproc.c @@ -0,0 +1,271 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (C) 2016 Broadcom + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IPROC_PWM_CTRL_OFFSET 0x00 +#define IPROC_PWM_CTRL_TYPE_SHIFT(ch) (15 + (ch)) +#define IPROC_PWM_CTRL_POLARITY_SHIFT(ch) (8 + (ch)) +#define IPROC_PWM_CTRL_EN_SHIFT(ch) (ch) + +#define IPROC_PWM_PERIOD_OFFSET(ch) (0x04 + ((ch) << 3)) +#define IPROC_PWM_PERIOD_MIN 0x02 +#define IPROC_PWM_PERIOD_MAX 0xffff + +#define IPROC_PWM_DUTY_CYCLE_OFFSET(ch) (0x08 + ((ch) << 3)) +#define IPROC_PWM_DUTY_CYCLE_MIN 0x00 +#define IPROC_PWM_DUTY_CYCLE_MAX 0xffff + +#define IPROC_PWM_PRESCALE_OFFSET 0x24 +#define IPROC_PWM_PRESCALE_BITS 0x06 +#define IPROC_PWM_PRESCALE_SHIFT(ch) ((3 - (ch)) * \ + IPROC_PWM_PRESCALE_BITS) +#define IPROC_PWM_PRESCALE_MASK(ch) (IPROC_PWM_PRESCALE_MAX << \ + IPROC_PWM_PRESCALE_SHIFT(ch)) +#define IPROC_PWM_PRESCALE_MIN 0x00 +#define IPROC_PWM_PRESCALE_MAX 0x3f + +struct iproc_pwmc { + struct pwm_chip chip; + void __iomem *base; + struct clk *clk; +}; + +static inline struct iproc_pwmc *to_iproc_pwmc(struct pwm_chip *chip) +{ + return container_of(chip, struct iproc_pwmc, chip); +} + +static void iproc_pwmc_enable(struct iproc_pwmc *ip, unsigned int channel) +{ + u32 value; + + value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); + value |= 1 << IPROC_PWM_CTRL_EN_SHIFT(channel); + writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); + + /* must be a 400 ns delay between clearing and setting enable bit */ + ndelay(400); +} + +static void iproc_pwmc_disable(struct iproc_pwmc *ip, unsigned int channel) +{ + u32 value; + + value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); + value &= ~(1 << IPROC_PWM_CTRL_EN_SHIFT(channel)); + writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); + + /* must be a 400 ns delay between clearing and setting enable bit */ + ndelay(400); +} + +static int iproc_pwmc_get_state(struct pwm_chip *chip, struct pwm_device *pwm, + struct pwm_state *state) +{ + struct iproc_pwmc *ip = to_iproc_pwmc(chip); + u64 tmp, multi, rate; + u32 value, prescale; + + value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); + + if (value & BIT(IPROC_PWM_CTRL_EN_SHIFT(pwm->hwpwm))) + state->enabled = true; + else + state->enabled = false; + + if (value & BIT(IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm))) + state->polarity = PWM_POLARITY_NORMAL; + else + state->polarity = PWM_POLARITY_INVERSED; + + rate = clk_get_rate(ip->clk); + if (rate == 0) { + state->period = 0; + state->duty_cycle = 0; + return 0; + } + + value = readl(ip->base + IPROC_PWM_PRESCALE_OFFSET); + prescale = value >> IPROC_PWM_PRESCALE_SHIFT(pwm->hwpwm); + prescale &= IPROC_PWM_PRESCALE_MAX; + + multi = NSEC_PER_SEC * (prescale + 1); + + value = readl(ip->base + IPROC_PWM_PERIOD_OFFSET(pwm->hwpwm)); + tmp = (value & IPROC_PWM_PERIOD_MAX) * multi; + state->period = div64_u64(tmp, rate); + + value = readl(ip->base + IPROC_PWM_DUTY_CYCLE_OFFSET(pwm->hwpwm)); + tmp = (value & IPROC_PWM_PERIOD_MAX) * multi; + state->duty_cycle = div64_u64(tmp, rate); + + return 0; +} + +static int iproc_pwmc_apply(struct pwm_chip *chip, struct pwm_device *pwm, + const struct pwm_state *state) +{ + unsigned long prescale = IPROC_PWM_PRESCALE_MIN; + struct iproc_pwmc *ip = to_iproc_pwmc(chip); + u32 value, period, duty; + u64 rate; + + rate = clk_get_rate(ip->clk); + + /* + * Find period count, duty count and prescale to suit duty_cycle and + * period. This is done according to formulas described below: + * + * period_ns = 10^9 * (PRESCALE + 1) * PC / PWM_CLK_RATE + * duty_ns = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE + * + * PC = (PWM_CLK_RATE * period_ns) / (10^9 * (PRESCALE + 1)) + * DC = (PWM_CLK_RATE * duty_ns) / (10^9 * (PRESCALE + 1)) + */ + while (1) { + u64 value, div; + + div = NSEC_PER_SEC * (prescale + 1); + value = rate * state->period; + period = div64_u64(value, div); + value = rate * state->duty_cycle; + duty = div64_u64(value, div); + + if (period < IPROC_PWM_PERIOD_MIN) + return -EINVAL; + + if (period <= IPROC_PWM_PERIOD_MAX && + duty <= IPROC_PWM_DUTY_CYCLE_MAX) + break; + + /* Otherwise, increase prescale and recalculate counts */ + if (++prescale > IPROC_PWM_PRESCALE_MAX) + return -EINVAL; + } + + iproc_pwmc_disable(ip, pwm->hwpwm); + + /* Set prescale */ + value = readl(ip->base + IPROC_PWM_PRESCALE_OFFSET); + value &= ~IPROC_PWM_PRESCALE_MASK(pwm->hwpwm); + value |= prescale << IPROC_PWM_PRESCALE_SHIFT(pwm->hwpwm); + writel(value, ip->base + IPROC_PWM_PRESCALE_OFFSET); + + /* set period and duty cycle */ + writel(period, ip->base + IPROC_PWM_PERIOD_OFFSET(pwm->hwpwm)); + writel(duty, ip->base + IPROC_PWM_DUTY_CYCLE_OFFSET(pwm->hwpwm)); + + /* set polarity */ + value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); + + if (state->polarity == PWM_POLARITY_NORMAL) + value |= 1 << IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm); + else + value &= ~(1 << IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm)); + + writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); + + if (state->enabled) + iproc_pwmc_enable(ip, pwm->hwpwm); + + return 0; +} + +static const struct pwm_ops iproc_pwm_ops = { + .apply = iproc_pwmc_apply, + .get_state = iproc_pwmc_get_state, + .owner = THIS_MODULE, +}; + +static int iproc_pwmc_probe(struct platform_device *pdev) +{ + struct iproc_pwmc *ip; + unsigned int i; + u32 value; + int ret; + + ip = devm_kzalloc(&pdev->dev, sizeof(*ip), GFP_KERNEL); + if (!ip) + return -ENOMEM; + + platform_set_drvdata(pdev, ip); + + ip->chip.dev = &pdev->dev; + ip->chip.ops = &iproc_pwm_ops; + ip->chip.npwm = 4; + + ip->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ip->base)) + return PTR_ERR(ip->base); + + ip->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(ip->clk)) { + dev_err(&pdev->dev, "failed to get clock: %ld\n", + PTR_ERR(ip->clk)); + return PTR_ERR(ip->clk); + } + + ret = clk_prepare_enable(ip->clk); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable clock: %d\n", ret); + return ret; + } + + /* Set full drive and normal polarity for all channels */ + value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); + + for (i = 0; i < ip->chip.npwm; i++) { + value &= ~(1 << IPROC_PWM_CTRL_TYPE_SHIFT(i)); + value |= 1 << IPROC_PWM_CTRL_POLARITY_SHIFT(i); + } + + writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); + + ret = pwmchip_add(&ip->chip); + if (ret < 0) { + dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret); + clk_disable_unprepare(ip->clk); + } + + return ret; +} + +static int iproc_pwmc_remove(struct platform_device *pdev) +{ + struct iproc_pwmc *ip = platform_get_drvdata(pdev); + + pwmchip_remove(&ip->chip); + + clk_disable_unprepare(ip->clk); + + return 0; +} + +static const struct of_device_id bcm_iproc_pwmc_dt[] = { + { .compatible = "brcm,iproc-pwm" }, + { }, +}; +MODULE_DEVICE_TABLE(of, bcm_iproc_pwmc_dt); + +static struct platform_driver iproc_pwmc_driver = { + .driver = { + .name = "bcm-iproc-pwm", + .of_match_table = bcm_iproc_pwmc_dt, + }, + .probe = iproc_pwmc_probe, + .remove = iproc_pwmc_remove, +}; +module_platform_driver(iproc_pwmc_driver); + +MODULE_AUTHOR("Yendapally Reddy Dhananjaya Reddy "); +MODULE_DESCRIPTION("Broadcom iProc PWM driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3