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/cdns3-ep0.c | 895 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 895 insertions(+) create mode 100644 drivers/usb/cdns3/cdns3-ep0.c (limited to 'drivers/usb/cdns3/cdns3-ep0.c') diff --git a/drivers/usb/cdns3/cdns3-ep0.c b/drivers/usb/cdns3/cdns3-ep0.c new file mode 100644 index 000000000..e29989d57 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-ep0.c @@ -0,0 +1,895 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Cadence USBSS DRD Driver - gadget side. + * + * Copyright (C) 2018 Cadence Design Systems. + * Copyright (C) 2017-2018 NXP + * + * Authors: Pawel Jez , + * Pawel Laszczak + * Peter Chen + */ + +#include +#include + +#include "cdns3-gadget.h" +#include "cdns3-trace.h" + +static struct usb_endpoint_descriptor cdns3_gadget_ep0_desc = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bmAttributes = USB_ENDPOINT_XFER_CONTROL, +}; + +/** + * cdns3_ep0_run_transfer - Do transfer on default endpoint hardware + * @priv_dev: extended gadget object + * @dma_addr: physical address where data is/will be stored + * @length: data length + * @erdy: set it to 1 when ERDY packet should be sent - + * exit from flow control state + * @zlp: add zero length packet + */ +static void cdns3_ep0_run_transfer(struct cdns3_device *priv_dev, + dma_addr_t dma_addr, + unsigned int length, int erdy, int zlp) +{ + struct cdns3_usb_regs __iomem *regs = priv_dev->regs; + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; + + priv_ep->trb_pool[0].buffer = cpu_to_le32(TRB_BUFFER(dma_addr)); + priv_ep->trb_pool[0].length = cpu_to_le32(TRB_LEN(length)); + + if (zlp) { + priv_ep->trb_pool[0].control = cpu_to_le32(TRB_CYCLE | TRB_TYPE(TRB_NORMAL)); + priv_ep->trb_pool[1].buffer = cpu_to_le32(TRB_BUFFER(dma_addr)); + priv_ep->trb_pool[1].length = cpu_to_le32(TRB_LEN(0)); + priv_ep->trb_pool[1].control = cpu_to_le32(TRB_CYCLE | TRB_IOC | + TRB_TYPE(TRB_NORMAL)); + } else { + priv_ep->trb_pool[0].control = cpu_to_le32(TRB_CYCLE | TRB_IOC | + TRB_TYPE(TRB_NORMAL)); + priv_ep->trb_pool[1].control = 0; + } + + trace_cdns3_prepare_trb(priv_ep, priv_ep->trb_pool); + + cdns3_select_ep(priv_dev, priv_dev->ep0_data_dir); + + writel(EP_STS_TRBERR, ®s->ep_sts); + writel(EP_TRADDR_TRADDR(priv_ep->trb_pool_dma), ®s->ep_traddr); + trace_cdns3_doorbell_ep0(priv_dev->ep0_data_dir ? "ep0in" : "ep0out", + readl(®s->ep_traddr)); + + /* TRB should be prepared before starting transfer. */ + writel(EP_CMD_DRDY, ®s->ep_cmd); + + /* Resume controller before arming transfer. */ + __cdns3_gadget_wakeup(priv_dev); + + if (erdy) + writel(EP_CMD_ERDY, &priv_dev->regs->ep_cmd); +} + +/** + * cdns3_ep0_delegate_req - Returns status of handling setup packet + * Setup is handled by gadget driver + * @priv_dev: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns zero on success or negative value on failure + */ +static int cdns3_ep0_delegate_req(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl_req) +{ + int ret; + + spin_unlock(&priv_dev->lock); + priv_dev->setup_pending = 1; + ret = priv_dev->gadget_driver->setup(&priv_dev->gadget, ctrl_req); + priv_dev->setup_pending = 0; + spin_lock(&priv_dev->lock); + return ret; +} + +static void cdns3_prepare_setup_packet(struct cdns3_device *priv_dev) +{ + priv_dev->ep0_data_dir = 0; + priv_dev->ep0_stage = CDNS3_SETUP_STAGE; + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, + sizeof(struct usb_ctrlrequest), 0, 0); +} + +static void cdns3_ep0_complete_setup(struct cdns3_device *priv_dev, + u8 send_stall, u8 send_erdy) +{ + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; + struct usb_request *request; + + request = cdns3_next_request(&priv_ep->pending_req_list); + if (request) + list_del_init(&request->list); + + if (send_stall) { + trace_cdns3_halt(priv_ep, send_stall, 0); + /* set_stall on ep0 */ + cdns3_select_ep(priv_dev, 0x00); + writel(EP_CMD_SSTALL, &priv_dev->regs->ep_cmd); + } else { + cdns3_prepare_setup_packet(priv_dev); + } + + priv_dev->ep0_stage = CDNS3_SETUP_STAGE; + writel((send_erdy ? EP_CMD_ERDY : 0) | EP_CMD_REQ_CMPL, + &priv_dev->regs->ep_cmd); +} + +/** + * cdns3_req_ep0_set_configuration - Handling of SET_CONFIG standard USB request + * @priv_dev: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, USB_GADGET_DELAYED_STATUS on deferred status stage, + * error code on error + */ +static int cdns3_req_ep0_set_configuration(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl_req) +{ + enum usb_device_state device_state = priv_dev->gadget.state; + u32 config = le16_to_cpu(ctrl_req->wValue); + int result = 0; + + switch (device_state) { + case USB_STATE_ADDRESS: + result = cdns3_ep0_delegate_req(priv_dev, ctrl_req); + + if (result || !config) + goto reset_config; + + break; + case USB_STATE_CONFIGURED: + result = cdns3_ep0_delegate_req(priv_dev, ctrl_req); + if (!config && !result) + goto reset_config; + + break; + default: + return -EINVAL; + } + + return 0; + +reset_config: + if (result != USB_GADGET_DELAYED_STATUS) + cdns3_hw_reset_eps_config(priv_dev); + + usb_gadget_set_state(&priv_dev->gadget, + USB_STATE_ADDRESS); + + return result; +} + +/** + * cdns3_req_ep0_set_address - Handling of SET_ADDRESS standard USB request + * @priv_dev: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns3_req_ep0_set_address(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl_req) +{ + enum usb_device_state device_state = priv_dev->gadget.state; + u32 reg; + u32 addr; + + addr = le16_to_cpu(ctrl_req->wValue); + + if (addr > USB_DEVICE_MAX_ADDRESS) { + dev_err(priv_dev->dev, + "Device address (%d) cannot be greater than %d\n", + addr, USB_DEVICE_MAX_ADDRESS); + return -EINVAL; + } + + if (device_state == USB_STATE_CONFIGURED) { + dev_err(priv_dev->dev, + "can't set_address from configured state\n"); + return -EINVAL; + } + + reg = readl(&priv_dev->regs->usb_cmd); + + writel(reg | USB_CMD_FADDR(addr) | USB_CMD_SET_ADDR, + &priv_dev->regs->usb_cmd); + + usb_gadget_set_state(&priv_dev->gadget, + (addr ? USB_STATE_ADDRESS : USB_STATE_DEFAULT)); + + return 0; +} + +/** + * cdns3_req_ep0_get_status - Handling of GET_STATUS standard USB request + * @priv_dev: extended gadget object + * @ctrl: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns3_req_ep0_get_status(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl) +{ + struct cdns3_endpoint *priv_ep; + __le16 *response_pkt; + u16 usb_status = 0; + u32 recip; + u8 index; + + recip = ctrl->bRequestType & USB_RECIP_MASK; + + switch (recip) { + case USB_RECIP_DEVICE: + /* self powered */ + if (priv_dev->is_selfpowered) + usb_status = BIT(USB_DEVICE_SELF_POWERED); + + if (priv_dev->wake_up_flag) + usb_status |= BIT(USB_DEVICE_REMOTE_WAKEUP); + + if (priv_dev->gadget.speed != USB_SPEED_SUPER) + break; + + if (priv_dev->u1_allowed) + usb_status |= BIT(USB_DEV_STAT_U1_ENABLED); + + if (priv_dev->u2_allowed) + usb_status |= BIT(USB_DEV_STAT_U2_ENABLED); + + break; + case USB_RECIP_INTERFACE: + return cdns3_ep0_delegate_req(priv_dev, ctrl); + case USB_RECIP_ENDPOINT: + index = cdns3_ep_addr_to_index(le16_to_cpu(ctrl->wIndex)); + priv_ep = priv_dev->eps[index]; + + /* check if endpoint is stalled or stall is pending */ + cdns3_select_ep(priv_dev, le16_to_cpu(ctrl->wIndex)); + if (EP_STS_STALL(readl(&priv_dev->regs->ep_sts)) || + (priv_ep->flags & EP_STALL_PENDING)) + usb_status = BIT(USB_ENDPOINT_HALT); + break; + default: + return -EINVAL; + } + + response_pkt = (__le16 *)priv_dev->setup_buf; + *response_pkt = cpu_to_le16(usb_status); + + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, + sizeof(*response_pkt), 1, 0); + return 0; +} + +static int cdns3_ep0_feature_handle_device(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl, + int set) +{ + enum usb_device_state state; + enum usb_device_speed speed; + int ret = 0; + u32 wValue; + u16 tmode; + + wValue = le16_to_cpu(ctrl->wValue); + state = priv_dev->gadget.state; + speed = priv_dev->gadget.speed; + + switch (wValue) { + case USB_DEVICE_REMOTE_WAKEUP: + priv_dev->wake_up_flag = !!set; + break; + case USB_DEVICE_U1_ENABLE: + if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER) + return -EINVAL; + + priv_dev->u1_allowed = !!set; + break; + case USB_DEVICE_U2_ENABLE: + if (state != USB_STATE_CONFIGURED || speed != USB_SPEED_SUPER) + return -EINVAL; + + priv_dev->u2_allowed = !!set; + break; + case USB_DEVICE_LTM_ENABLE: + ret = -EINVAL; + break; + case USB_DEVICE_TEST_MODE: + if (state != USB_STATE_CONFIGURED || speed > USB_SPEED_HIGH) + return -EINVAL; + + tmode = le16_to_cpu(ctrl->wIndex); + + if (!set || (tmode & 0xff) != 0) + return -EINVAL; + + tmode >>= 8; + switch (tmode) { + case USB_TEST_J: + case USB_TEST_K: + case USB_TEST_SE0_NAK: + case USB_TEST_PACKET: + cdns3_set_register_bit(&priv_dev->regs->usb_cmd, + USB_CMD_STMODE | + USB_STS_TMODE_SEL(tmode - 1)); + break; + default: + ret = -EINVAL; + } + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int cdns3_ep0_feature_handle_intf(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl, + int set) +{ + u32 wValue; + int ret = 0; + + wValue = le16_to_cpu(ctrl->wValue); + + switch (wValue) { + case USB_INTRF_FUNC_SUSPEND: + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int cdns3_ep0_feature_handle_endpoint(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl, + int set) +{ + struct cdns3_endpoint *priv_ep; + int ret = 0; + u8 index; + + if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT) + return -EINVAL; + + if (!(le16_to_cpu(ctrl->wIndex) & ~USB_DIR_IN)) + return 0; + + index = cdns3_ep_addr_to_index(le16_to_cpu(ctrl->wIndex)); + priv_ep = priv_dev->eps[index]; + + cdns3_select_ep(priv_dev, le16_to_cpu(ctrl->wIndex)); + + if (set) + __cdns3_gadget_ep_set_halt(priv_ep); + else if (!(priv_ep->flags & EP_WEDGE)) + ret = __cdns3_gadget_ep_clear_halt(priv_ep); + + cdns3_select_ep(priv_dev, 0x00); + + return ret; +} + +/** + * cdns3_req_ep0_handle_feature - + * Handling of GET/SET_FEATURE standard USB request + * + * @priv_dev: extended gadget object + * @ctrl: pointer to received setup packet + * @set: must be set to 1 for SET_FEATURE request + * + * Returns 0 if success, error code on error + */ +static int cdns3_req_ep0_handle_feature(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl, + int set) +{ + int ret = 0; + u32 recip; + + recip = ctrl->bRequestType & USB_RECIP_MASK; + + switch (recip) { + case USB_RECIP_DEVICE: + ret = cdns3_ep0_feature_handle_device(priv_dev, ctrl, set); + break; + case USB_RECIP_INTERFACE: + ret = cdns3_ep0_feature_handle_intf(priv_dev, ctrl, set); + break; + case USB_RECIP_ENDPOINT: + ret = cdns3_ep0_feature_handle_endpoint(priv_dev, ctrl, set); + break; + default: + return -EINVAL; + } + + return ret; +} + +/** + * cdns3_req_ep0_set_sel - Handling of SET_SEL standard USB request + * @priv_dev: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns3_req_ep0_set_sel(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl_req) +{ + if (priv_dev->gadget.state < USB_STATE_ADDRESS) + return -EINVAL; + + if (le16_to_cpu(ctrl_req->wLength) != 6) { + dev_err(priv_dev->dev, "Set SEL should be 6 bytes, got %d\n", + ctrl_req->wLength); + return -EINVAL; + } + + cdns3_ep0_run_transfer(priv_dev, priv_dev->setup_dma, 6, 1, 0); + return 0; +} + +/** + * cdns3_req_ep0_set_isoch_delay - + * Handling of GET_ISOCH_DELAY standard USB request + * @priv_dev: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns3_req_ep0_set_isoch_delay(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl_req) +{ + if (ctrl_req->wIndex || ctrl_req->wLength) + return -EINVAL; + + priv_dev->isoch_delay = le16_to_cpu(ctrl_req->wValue); + + return 0; +} + +/** + * cdns3_ep0_standard_request - Handling standard USB requests + * @priv_dev: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns3_ep0_standard_request(struct cdns3_device *priv_dev, + struct usb_ctrlrequest *ctrl_req) +{ + int ret; + + switch (ctrl_req->bRequest) { + case USB_REQ_SET_ADDRESS: + ret = cdns3_req_ep0_set_address(priv_dev, ctrl_req); + break; + case USB_REQ_SET_CONFIGURATION: + ret = cdns3_req_ep0_set_configuration(priv_dev, ctrl_req); + break; + case USB_REQ_GET_STATUS: + ret = cdns3_req_ep0_get_status(priv_dev, ctrl_req); + break; + case USB_REQ_CLEAR_FEATURE: + ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 0); + break; + case USB_REQ_SET_FEATURE: + ret = cdns3_req_ep0_handle_feature(priv_dev, ctrl_req, 1); + break; + case USB_REQ_SET_SEL: + ret = cdns3_req_ep0_set_sel(priv_dev, ctrl_req); + break; + case USB_REQ_SET_ISOCH_DELAY: + ret = cdns3_req_ep0_set_isoch_delay(priv_dev, ctrl_req); + break; + default: + ret = cdns3_ep0_delegate_req(priv_dev, ctrl_req); + break; + } + + return ret; +} + +static void __pending_setup_status_handler(struct cdns3_device *priv_dev) +{ + struct usb_request *request = priv_dev->pending_status_request; + + if (priv_dev->status_completion_no_call && request && + request->complete) { + request->complete(&priv_dev->eps[0]->endpoint, request); + priv_dev->status_completion_no_call = 0; + } +} + +void cdns3_pending_setup_status_handler(struct work_struct *work) +{ + struct cdns3_device *priv_dev = container_of(work, struct cdns3_device, + pending_status_wq); + unsigned long flags; + + spin_lock_irqsave(&priv_dev->lock, flags); + __pending_setup_status_handler(priv_dev); + spin_unlock_irqrestore(&priv_dev->lock, flags); +} + +/** + * cdns3_ep0_setup_phase - Handling setup USB requests + * @priv_dev: extended gadget object + */ +static void cdns3_ep0_setup_phase(struct cdns3_device *priv_dev) +{ + struct usb_ctrlrequest *ctrl = priv_dev->setup_buf; + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; + int result; + + priv_dev->ep0_data_dir = ctrl->bRequestType & USB_DIR_IN; + + trace_cdns3_ctrl_req(ctrl); + + if (!list_empty(&priv_ep->pending_req_list)) { + struct usb_request *request; + + request = cdns3_next_request(&priv_ep->pending_req_list); + priv_ep->dir = priv_dev->ep0_data_dir; + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), + -ECONNRESET); + } + + if (le16_to_cpu(ctrl->wLength)) + priv_dev->ep0_stage = CDNS3_DATA_STAGE; + else + priv_dev->ep0_stage = CDNS3_STATUS_STAGE; + + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + result = cdns3_ep0_standard_request(priv_dev, ctrl); + else + result = cdns3_ep0_delegate_req(priv_dev, ctrl); + + if (result == USB_GADGET_DELAYED_STATUS) + return; + + if (result < 0) + cdns3_ep0_complete_setup(priv_dev, 1, 1); + else if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE) + cdns3_ep0_complete_setup(priv_dev, 0, 1); +} + +static void cdns3_transfer_completed(struct cdns3_device *priv_dev) +{ + struct cdns3_endpoint *priv_ep = priv_dev->eps[0]; + + if (!list_empty(&priv_ep->pending_req_list)) { + struct usb_request *request; + + trace_cdns3_complete_trb(priv_ep, priv_ep->trb_pool); + request = cdns3_next_request(&priv_ep->pending_req_list); + + request->actual = + TRB_LEN(le32_to_cpu(priv_ep->trb_pool->length)); + + priv_ep->dir = priv_dev->ep0_data_dir; + cdns3_gadget_giveback(priv_ep, to_cdns3_request(request), 0); + } + + cdns3_ep0_complete_setup(priv_dev, 0, 0); +} + +/** + * cdns3_check_new_setup - Check if controller receive new SETUP packet. + * @priv_dev: extended gadget object + * + * The SETUP packet can be kept in on-chip memory or in system memory. + */ +static bool cdns3_check_new_setup(struct cdns3_device *priv_dev) +{ + u32 ep_sts_reg; + + cdns3_select_ep(priv_dev, USB_DIR_OUT); + ep_sts_reg = readl(&priv_dev->regs->ep_sts); + + return !!(ep_sts_reg & (EP_STS_SETUP | EP_STS_STPWAIT)); +} + +/** + * cdns3_check_ep0_interrupt_proceed - Processes interrupt related to endpoint 0 + * @priv_dev: extended gadget object + * @dir: USB_DIR_IN for IN direction, USB_DIR_OUT for OUT direction + */ +void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir) +{ + u32 ep_sts_reg; + + cdns3_select_ep(priv_dev, dir); + + ep_sts_reg = readl(&priv_dev->regs->ep_sts); + writel(ep_sts_reg, &priv_dev->regs->ep_sts); + + trace_cdns3_ep0_irq(priv_dev, ep_sts_reg); + + __pending_setup_status_handler(priv_dev); + + if (ep_sts_reg & EP_STS_SETUP) + priv_dev->wait_for_setup = 1; + + if (priv_dev->wait_for_setup && ep_sts_reg & EP_STS_IOC) { + priv_dev->wait_for_setup = 0; + cdns3_ep0_setup_phase(priv_dev); + } else if ((ep_sts_reg & EP_STS_IOC) || (ep_sts_reg & EP_STS_ISP)) { + priv_dev->ep0_data_dir = dir; + cdns3_transfer_completed(priv_dev); + } + + if (ep_sts_reg & EP_STS_DESCMIS) { + if (dir == 0 && !priv_dev->setup_pending) + cdns3_prepare_setup_packet(priv_dev); + } +} + +/** + * cdns3_gadget_ep0_enable + * @ep: pointer to endpoint zero object + * @desc: pointer to usb endpoint descriptor + * + * Function shouldn't be called by gadget driver, + * endpoint 0 is allways active + */ +static int cdns3_gadget_ep0_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + return -EINVAL; +} + +/** + * cdns3_gadget_ep0_disable + * @ep: pointer to endpoint zero object + * + * Function shouldn't be called by gadget driver, + * endpoint 0 is allways active + */ +static int cdns3_gadget_ep0_disable(struct usb_ep *ep) +{ + return -EINVAL; +} + +/** + * cdns3_gadget_ep0_set_halt + * @ep: pointer to endpoint zero object + * @value: 1 for set stall, 0 for clear stall + * + * Returns 0 + */ +static int cdns3_gadget_ep0_set_halt(struct usb_ep *ep, int value) +{ + /* TODO */ + return 0; +} + +/** + * cdns3_gadget_ep0_queue - Transfer data on endpoint zero + * @ep: pointer to endpoint zero object + * @request: pointer to request object + * @gfp_flags: gfp flags + * + * Returns 0 on success, error code elsewhere + */ +static int cdns3_gadget_ep0_queue(struct usb_ep *ep, + struct usb_request *request, + gfp_t gfp_flags) +{ + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; + unsigned long flags; + int ret = 0; + u8 zlp = 0; + int i; + + spin_lock_irqsave(&priv_dev->lock, flags); + trace_cdns3_ep0_queue(priv_dev, request); + + /* cancel the request if controller receive new SETUP packet. */ + if (cdns3_check_new_setup(priv_dev)) { + spin_unlock_irqrestore(&priv_dev->lock, flags); + return -ECONNRESET; + } + + /* send STATUS stage. Should be called only for SET_CONFIGURATION */ + if (priv_dev->ep0_stage == CDNS3_STATUS_STAGE) { + u32 val; + + cdns3_select_ep(priv_dev, 0x00); + + /* + * Configure all non-control EPs which are not enabled by class driver + */ + for (i = 0; i < CDNS3_ENDPOINTS_MAX_COUNT; i++) { + priv_ep = priv_dev->eps[i]; + if (priv_ep && priv_ep->flags & EP_CLAIMED && + !(priv_ep->flags & EP_ENABLED)) + cdns3_ep_config(priv_ep, 0); + } + + cdns3_set_hw_configuration(priv_dev); + cdns3_ep0_complete_setup(priv_dev, 0, 1); + /* wait until configuration set */ + ret = readl_poll_timeout_atomic(&priv_dev->regs->usb_sts, val, + val & USB_STS_CFGSTS_MASK, 1, 100); + if (ret == -ETIMEDOUT) + dev_warn(priv_dev->dev, "timeout for waiting configuration set\n"); + + request->actual = 0; + priv_dev->status_completion_no_call = true; + priv_dev->pending_status_request = request; + usb_gadget_set_state(&priv_dev->gadget, USB_STATE_CONFIGURED); + spin_unlock_irqrestore(&priv_dev->lock, flags); + + /* + * Since there is no completion interrupt for status stage, + * it needs to call ->completion in software after + * ep0_queue is back. + */ + queue_work(system_freezable_wq, &priv_dev->pending_status_wq); + return ret; + } + + if (!list_empty(&priv_ep->pending_req_list)) { + dev_err(priv_dev->dev, + "can't handle multiple requests for ep0\n"); + spin_unlock_irqrestore(&priv_dev->lock, flags); + return -EBUSY; + } + + ret = usb_gadget_map_request_by_dev(priv_dev->sysdev, request, + priv_dev->ep0_data_dir); + if (ret) { + spin_unlock_irqrestore(&priv_dev->lock, flags); + dev_err(priv_dev->dev, "failed to map request\n"); + return -EINVAL; + } + + request->status = -EINPROGRESS; + list_add_tail(&request->list, &priv_ep->pending_req_list); + + if (request->zero && request->length && + (request->length % ep->maxpacket == 0)) + zlp = 1; + + cdns3_ep0_run_transfer(priv_dev, request->dma, request->length, 1, zlp); + + spin_unlock_irqrestore(&priv_dev->lock, flags); + + return ret; +} + +/** + * cdns3_gadget_ep_set_wedge - Set wedge on selected endpoint + * @ep: endpoint object + * + * Returns 0 + */ +int cdns3_gadget_ep_set_wedge(struct usb_ep *ep) +{ + struct cdns3_endpoint *priv_ep = ep_to_cdns3_ep(ep); + struct cdns3_device *priv_dev = priv_ep->cdns3_dev; + + dev_dbg(priv_dev->dev, "Wedge for %s\n", ep->name); + cdns3_gadget_ep_set_halt(ep, 1); + priv_ep->flags |= EP_WEDGE; + + return 0; +} + +static const struct usb_ep_ops cdns3_gadget_ep0_ops = { + .enable = cdns3_gadget_ep0_enable, + .disable = cdns3_gadget_ep0_disable, + .alloc_request = cdns3_gadget_ep_alloc_request, + .free_request = cdns3_gadget_ep_free_request, + .queue = cdns3_gadget_ep0_queue, + .dequeue = cdns3_gadget_ep_dequeue, + .set_halt = cdns3_gadget_ep0_set_halt, + .set_wedge = cdns3_gadget_ep_set_wedge, +}; + +/** + * cdns3_ep0_config - Configures default endpoint + * @priv_dev: extended gadget object + * + * Functions sets parameters: maximal packet size and enables interrupts + */ +void cdns3_ep0_config(struct cdns3_device *priv_dev) +{ + struct cdns3_usb_regs __iomem *regs; + struct cdns3_endpoint *priv_ep; + u32 max_packet_size = 64; + u32 ep_cfg; + + regs = priv_dev->regs; + + if (priv_dev->gadget.speed == USB_SPEED_SUPER) + max_packet_size = 512; + + priv_ep = priv_dev->eps[0]; + + if (!list_empty(&priv_ep->pending_req_list)) { + struct usb_request *request; + + request = cdns3_next_request(&priv_ep->pending_req_list); + list_del_init(&request->list); + } + + priv_dev->u1_allowed = 0; + priv_dev->u2_allowed = 0; + + priv_dev->gadget.ep0->maxpacket = max_packet_size; + cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(max_packet_size); + + /* init ep out */ + cdns3_select_ep(priv_dev, USB_DIR_OUT); + + if (priv_dev->dev_ver >= DEV_VER_V3) { + cdns3_set_register_bit(&priv_dev->regs->dtrans, + BIT(0) | BIT(16)); + cdns3_set_register_bit(&priv_dev->regs->tdl_from_trb, + BIT(0) | BIT(16)); + } + + ep_cfg = EP_CFG_ENABLE | EP_CFG_MAXPKTSIZE(max_packet_size); + + if (!(priv_ep->flags & EP_CONFIGURED)) + writel(ep_cfg, ®s->ep_cfg); + + writel(EP_STS_EN_SETUPEN | EP_STS_EN_DESCMISEN | EP_STS_EN_TRBERREN, + ®s->ep_sts_en); + + /* init ep in */ + cdns3_select_ep(priv_dev, USB_DIR_IN); + + if (!(priv_ep->flags & EP_CONFIGURED)) + writel(ep_cfg, ®s->ep_cfg); + + priv_ep->flags |= EP_CONFIGURED; + + writel(EP_STS_EN_SETUPEN | EP_STS_EN_TRBERREN, ®s->ep_sts_en); + + cdns3_set_register_bit(®s->usb_conf, USB_CONF_U1DS | USB_CONF_U2DS); +} + +/** + * cdns3_init_ep0 - Initializes software endpoint 0 of gadget + * @priv_dev: extended gadget object + * @priv_ep: extended endpoint object + * + * Returns 0 on success else error code. + */ +int cdns3_init_ep0(struct cdns3_device *priv_dev, + struct cdns3_endpoint *priv_ep) +{ + sprintf(priv_ep->name, "ep0"); + + /* fill linux fields */ + priv_ep->endpoint.ops = &cdns3_gadget_ep0_ops; + priv_ep->endpoint.maxburst = 1; + usb_ep_set_maxpacket_limit(&priv_ep->endpoint, + CDNS3_EP0_MAX_PACKET_LIMIT); + priv_ep->endpoint.address = 0; + priv_ep->endpoint.caps.type_control = 1; + priv_ep->endpoint.caps.dir_in = 1; + priv_ep->endpoint.caps.dir_out = 1; + priv_ep->endpoint.name = priv_ep->name; + priv_ep->endpoint.desc = &cdns3_gadget_ep0_desc; + priv_dev->gadget.ep0 = &priv_ep->endpoint; + priv_ep->type = USB_ENDPOINT_XFER_CONTROL; + + return cdns3_allocate_trb_pool(priv_ep); +} -- cgit v1.2.3