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/usb/cdns3/drd.c | 495 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 495 insertions(+) create mode 100644 drivers/usb/cdns3/drd.c (limited to 'drivers/usb/cdns3/drd.c') diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c new file mode 100644 index 000000000..d00ff98df --- /dev/null +++ b/drivers/usb/cdns3/drd.c @@ -0,0 +1,495 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Cadence USBSS and USBSSP DRD Driver. + * + * Copyright (C) 2018-2020 Cadence. + * Copyright (C) 2019 Texas Instruments + * + * Author: Pawel Laszczak + * Roger Quadros + * + */ +#include +#include +#include +#include +#include + +#include "drd.h" +#include "core.h" + +/** + * cdns_set_mode - change mode of OTG Core + * @cdns: pointer to context structure + * @mode: selected mode from cdns_role + * + * Returns 0 on success otherwise negative errno + */ +static int cdns_set_mode(struct cdns *cdns, enum usb_dr_mode mode) +{ + void __iomem *override_reg; + u32 reg; + + switch (mode) { + case USB_DR_MODE_PERIPHERAL: + break; + case USB_DR_MODE_HOST: + break; + case USB_DR_MODE_OTG: + dev_dbg(cdns->dev, "Set controller to OTG mode\n"); + + if (cdns->version == CDNSP_CONTROLLER_V2) + override_reg = &cdns->otg_cdnsp_regs->override; + else if (cdns->version == CDNS3_CONTROLLER_V1) + override_reg = &cdns->otg_v1_regs->override; + else + override_reg = &cdns->otg_v0_regs->ctrl1; + + reg = readl(override_reg); + + if (cdns->version != CDNS3_CONTROLLER_V0) + reg |= OVERRIDE_IDPULLUP; + else + reg |= OVERRIDE_IDPULLUP_V0; + + writel(reg, override_reg); + + if (cdns->version == CDNS3_CONTROLLER_V1) { + /* + * Enable work around feature built into the + * controller to address issue with RX Sensitivity + * est (EL_17) for USB2 PHY. The issue only occures + * for 0x0002450D controller version. + */ + if (cdns->phyrst_a_enable) { + reg = readl(&cdns->otg_v1_regs->phyrst_cfg); + reg |= PHYRST_CFG_PHYRST_A_ENABLE; + writel(reg, &cdns->otg_v1_regs->phyrst_cfg); + } + } + + /* + * Hardware specification says: "ID_VALUE must be valid within + * 50ms after idpullup is set to '1" so driver must wait + * 50ms before reading this pin. + */ + usleep_range(50000, 60000); + break; + default: + dev_err(cdns->dev, "Unsupported mode of operation %d\n", mode); + return -EINVAL; + } + + return 0; +} + +int cdns_get_id(struct cdns *cdns) +{ + int id; + + id = readl(&cdns->otg_regs->sts) & OTGSTS_ID_VALUE; + dev_dbg(cdns->dev, "OTG ID: %d", id); + + return id; +} + +int cdns_get_vbus(struct cdns *cdns) +{ + int vbus; + + vbus = !!(readl(&cdns->otg_regs->sts) & OTGSTS_VBUS_VALID); + dev_dbg(cdns->dev, "OTG VBUS: %d", vbus); + + return vbus; +} + +void cdns_clear_vbus(struct cdns *cdns) +{ + u32 reg; + + if (cdns->version != CDNSP_CONTROLLER_V2) + return; + + reg = readl(&cdns->otg_cdnsp_regs->override); + reg |= OVERRIDE_SESS_VLD_SEL; + writel(reg, &cdns->otg_cdnsp_regs->override); +} +EXPORT_SYMBOL_GPL(cdns_clear_vbus); + +void cdns_set_vbus(struct cdns *cdns) +{ + u32 reg; + + if (cdns->version != CDNSP_CONTROLLER_V2) + return; + + reg = readl(&cdns->otg_cdnsp_regs->override); + reg &= ~OVERRIDE_SESS_VLD_SEL; + writel(reg, &cdns->otg_cdnsp_regs->override); +} +EXPORT_SYMBOL_GPL(cdns_set_vbus); + +bool cdns_is_host(struct cdns *cdns) +{ + if (cdns->dr_mode == USB_DR_MODE_HOST) + return true; + else if (cdns_get_id(cdns) == CDNS3_ID_HOST) + return true; + + return false; +} + +bool cdns_is_device(struct cdns *cdns) +{ + if (cdns->dr_mode == USB_DR_MODE_PERIPHERAL) + return true; + else if (cdns->dr_mode == USB_DR_MODE_OTG) + if (cdns_get_id(cdns) == CDNS3_ID_PERIPHERAL) + return true; + + return false; +} + +/** + * cdns_otg_disable_irq - Disable all OTG interrupts + * @cdns: Pointer to controller context structure + */ +static void cdns_otg_disable_irq(struct cdns *cdns) +{ + writel(0, &cdns->otg_irq_regs->ien); +} + +/** + * cdns_otg_enable_irq - enable id and sess_valid interrupts + * @cdns: Pointer to controller context structure + */ +static void cdns_otg_enable_irq(struct cdns *cdns) +{ + writel(OTGIEN_ID_CHANGE_INT | OTGIEN_VBUSVALID_RISE_INT | + OTGIEN_VBUSVALID_FALL_INT, &cdns->otg_irq_regs->ien); +} + +/** + * cdns_drd_host_on - start host. + * @cdns: Pointer to controller context structure. + * + * Returns 0 on success otherwise negative errno. + */ +int cdns_drd_host_on(struct cdns *cdns) +{ + u32 val, ready_bit; + int ret; + + /* Enable host mode. */ + writel(OTGCMD_HOST_BUS_REQ | OTGCMD_OTG_DIS, + &cdns->otg_regs->cmd); + + if (cdns->version == CDNSP_CONTROLLER_V2) + ready_bit = OTGSTS_CDNSP_XHCI_READY; + else + ready_bit = OTGSTS_CDNS3_XHCI_READY; + + dev_dbg(cdns->dev, "Waiting till Host mode is turned on\n"); + ret = readl_poll_timeout_atomic(&cdns->otg_regs->sts, val, + val & ready_bit, 1, 100000); + + if (ret) + dev_err(cdns->dev, "timeout waiting for xhci_ready\n"); + + phy_set_mode(cdns->usb3_phy, PHY_MODE_USB_HOST); + return ret; +} + +/** + * cdns_drd_host_off - stop host. + * @cdns: Pointer to controller context structure. + */ +void cdns_drd_host_off(struct cdns *cdns) +{ + u32 val; + + writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP | + OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF, + &cdns->otg_regs->cmd); + + /* Waiting till H_IDLE state.*/ + readl_poll_timeout_atomic(&cdns->otg_regs->state, val, + !(val & OTGSTATE_HOST_STATE_MASK), + 1, 2000000); + phy_set_mode(cdns->usb3_phy, PHY_MODE_INVALID); +} + +/** + * cdns_drd_gadget_on - start gadget. + * @cdns: Pointer to controller context structure. + * + * Returns 0 on success otherwise negative errno + */ +int cdns_drd_gadget_on(struct cdns *cdns) +{ + u32 reg = OTGCMD_OTG_DIS; + u32 ready_bit; + int ret, val; + + /* switch OTG core */ + writel(OTGCMD_DEV_BUS_REQ | reg, &cdns->otg_regs->cmd); + + dev_dbg(cdns->dev, "Waiting till Device mode is turned on\n"); + + if (cdns->version == CDNSP_CONTROLLER_V2) + ready_bit = OTGSTS_CDNSP_DEV_READY; + else + ready_bit = OTGSTS_CDNS3_DEV_READY; + + ret = readl_poll_timeout_atomic(&cdns->otg_regs->sts, val, + val & ready_bit, 1, 100000); + if (ret) { + dev_err(cdns->dev, "timeout waiting for dev_ready\n"); + return ret; + } + + phy_set_mode(cdns->usb3_phy, PHY_MODE_USB_DEVICE); + return 0; +} +EXPORT_SYMBOL_GPL(cdns_drd_gadget_on); + +/** + * cdns_drd_gadget_off - stop gadget. + * @cdns: Pointer to controller context structure. + */ +void cdns_drd_gadget_off(struct cdns *cdns) +{ + u32 val; + + /* + * Driver should wait at least 10us after disabling Device + * before turning-off Device (DEV_BUS_DROP). + */ + usleep_range(20, 30); + writel(OTGCMD_HOST_BUS_DROP | OTGCMD_DEV_BUS_DROP | + OTGCMD_DEV_POWER_OFF | OTGCMD_HOST_POWER_OFF, + &cdns->otg_regs->cmd); + /* Waiting till DEV_IDLE state.*/ + readl_poll_timeout_atomic(&cdns->otg_regs->state, val, + !(val & OTGSTATE_DEV_STATE_MASK), + 1, 2000000); + phy_set_mode(cdns->usb3_phy, PHY_MODE_INVALID); +} +EXPORT_SYMBOL_GPL(cdns_drd_gadget_off); + +/** + * cdns_init_otg_mode - initialize drd controller + * @cdns: Pointer to controller context structure + * + * Returns 0 on success otherwise negative errno + */ +static int cdns_init_otg_mode(struct cdns *cdns) +{ + int ret; + + cdns_otg_disable_irq(cdns); + /* clear all interrupts */ + writel(~0, &cdns->otg_irq_regs->ivect); + + ret = cdns_set_mode(cdns, USB_DR_MODE_OTG); + if (ret) + return ret; + + cdns_otg_enable_irq(cdns); + + return 0; +} + +/** + * cdns_drd_update_mode - initialize mode of operation + * @cdns: Pointer to controller context structure + * + * Returns 0 on success otherwise negative errno + */ +int cdns_drd_update_mode(struct cdns *cdns) +{ + int ret; + + switch (cdns->dr_mode) { + case USB_DR_MODE_PERIPHERAL: + ret = cdns_set_mode(cdns, USB_DR_MODE_PERIPHERAL); + break; + case USB_DR_MODE_HOST: + ret = cdns_set_mode(cdns, USB_DR_MODE_HOST); + break; + case USB_DR_MODE_OTG: + ret = cdns_init_otg_mode(cdns); + break; + default: + dev_err(cdns->dev, "Unsupported mode of operation %d\n", + cdns->dr_mode); + return -EINVAL; + } + + return ret; +} + +static irqreturn_t cdns_drd_thread_irq(int irq, void *data) +{ + struct cdns *cdns = data; + + cdns_hw_role_switch(cdns); + + return IRQ_HANDLED; +} + +/** + * cdns_drd_irq - interrupt handler for OTG events + * + * @irq: irq number for cdns core device + * @data: structure of cdns + * + * Returns IRQ_HANDLED or IRQ_NONE + */ +static irqreturn_t cdns_drd_irq(int irq, void *data) +{ + irqreturn_t ret = IRQ_NONE; + struct cdns *cdns = data; + u32 reg; + + if (cdns->dr_mode != USB_DR_MODE_OTG) + return IRQ_NONE; + + if (cdns->in_lpm) + return ret; + + reg = readl(&cdns->otg_irq_regs->ivect); + + if (!reg) + return IRQ_NONE; + + if (reg & OTGIEN_ID_CHANGE_INT) { + dev_dbg(cdns->dev, "OTG IRQ: new ID: %d\n", + cdns_get_id(cdns)); + + ret = IRQ_WAKE_THREAD; + } + + if (reg & (OTGIEN_VBUSVALID_RISE_INT | OTGIEN_VBUSVALID_FALL_INT)) { + dev_dbg(cdns->dev, "OTG IRQ: new VBUS: %d\n", + cdns_get_vbus(cdns)); + + ret = IRQ_WAKE_THREAD; + } + + writel(~0, &cdns->otg_irq_regs->ivect); + return ret; +} + +int cdns_drd_init(struct cdns *cdns) +{ + void __iomem *regs; + u32 state; + int ret; + + regs = devm_ioremap_resource(cdns->dev, &cdns->otg_res); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + /* Detection of DRD version. Controller has been released + * in three versions. All are very similar and are software compatible, + * but they have same changes in register maps. + * The first register in oldest version is command register and it's + * read only. Driver should read 0 from it. On the other hand, in v1 + * and v2 the first register contains device ID number which is not + * set to 0. Driver uses this fact to detect the proper version of + * controller. + */ + cdns->otg_v0_regs = regs; + if (!readl(&cdns->otg_v0_regs->cmd)) { + cdns->version = CDNS3_CONTROLLER_V0; + cdns->otg_v1_regs = NULL; + cdns->otg_cdnsp_regs = NULL; + cdns->otg_regs = regs; + cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *) + &cdns->otg_v0_regs->ien; + writel(1, &cdns->otg_v0_regs->simulate); + dev_dbg(cdns->dev, "DRD version v0 (%08x)\n", + readl(&cdns->otg_v0_regs->version)); + } else { + cdns->otg_v0_regs = NULL; + cdns->otg_v1_regs = regs; + cdns->otg_cdnsp_regs = regs; + + cdns->otg_regs = (void __iomem *)&cdns->otg_v1_regs->cmd; + + if (readl(&cdns->otg_cdnsp_regs->did) == OTG_CDNSP_DID) { + cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *) + &cdns->otg_cdnsp_regs->ien; + cdns->version = CDNSP_CONTROLLER_V2; + } else { + cdns->otg_irq_regs = (struct cdns_otg_irq_regs __iomem *) + &cdns->otg_v1_regs->ien; + writel(1, &cdns->otg_v1_regs->simulate); + cdns->version = CDNS3_CONTROLLER_V1; + } + + dev_dbg(cdns->dev, "DRD version v1 (ID: %08x, rev: %08x)\n", + readl(&cdns->otg_v1_regs->did), + readl(&cdns->otg_v1_regs->rid)); + } + + state = OTGSTS_STRAP(readl(&cdns->otg_regs->sts)); + + /* Update dr_mode according to STRAP configuration. */ + cdns->dr_mode = USB_DR_MODE_OTG; + + if ((cdns->version == CDNSP_CONTROLLER_V2 && + state == OTGSTS_CDNSP_STRAP_HOST) || + (cdns->version != CDNSP_CONTROLLER_V2 && + state == OTGSTS_STRAP_HOST)) { + dev_dbg(cdns->dev, "Controller strapped to HOST\n"); + cdns->dr_mode = USB_DR_MODE_HOST; + } else if ((cdns->version == CDNSP_CONTROLLER_V2 && + state == OTGSTS_CDNSP_STRAP_GADGET) || + (cdns->version != CDNSP_CONTROLLER_V2 && + state == OTGSTS_STRAP_GADGET)) { + dev_dbg(cdns->dev, "Controller strapped to PERIPHERAL\n"); + cdns->dr_mode = USB_DR_MODE_PERIPHERAL; + } + + ret = devm_request_threaded_irq(cdns->dev, cdns->otg_irq, + cdns_drd_irq, + cdns_drd_thread_irq, + IRQF_SHARED, + dev_name(cdns->dev), cdns); + if (ret) { + dev_err(cdns->dev, "couldn't get otg_irq\n"); + return ret; + } + + state = readl(&cdns->otg_regs->sts); + if (OTGSTS_OTG_NRDY(state)) { + dev_err(cdns->dev, "Cadence USB3 OTG device not ready\n"); + return -ENODEV; + } + + return 0; +} + +int cdns_drd_exit(struct cdns *cdns) +{ + cdns_otg_disable_irq(cdns); + + return 0; +} + + +/* Indicate the cdns3 core was power lost before */ +bool cdns_power_is_lost(struct cdns *cdns) +{ + if (cdns->version == CDNS3_CONTROLLER_V0) { + if (!(readl(&cdns->otg_v0_regs->simulate) & BIT(0))) + return true; + } else { + if (!(readl(&cdns->otg_v1_regs->simulate) & BIT(0))) + return true; + } + return false; +} +EXPORT_SYMBOL_GPL(cdns_power_is_lost); -- cgit v1.2.3