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/common/usb-otg-fsm.c | 452 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 452 insertions(+) create mode 100644 drivers/usb/common/usb-otg-fsm.c (limited to 'drivers/usb/common/usb-otg-fsm.c') diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c new file mode 100644 index 000000000..0697fde51 --- /dev/null +++ b/drivers/usb/common/usb-otg-fsm.c @@ -0,0 +1,452 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * OTG Finite State Machine from OTG spec + * + * Copyright (C) 2007,2008 Freescale Semiconductor, Inc. + * + * Author: Li Yang + * Jerry Huang + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef VERBOSE +#define VDBG(fmt, args...) pr_debug("[%s] " fmt, \ + __func__, ## args) +#else +#define VDBG(stuff...) do {} while (0) +#endif + +/* Change USB protocol when there is a protocol change */ +static int otg_set_protocol(struct otg_fsm *fsm, int protocol) +{ + int ret = 0; + + if (fsm->protocol != protocol) { + VDBG("Changing role fsm->protocol= %d; new protocol= %d\n", + fsm->protocol, protocol); + /* stop old protocol */ + if (fsm->protocol == PROTO_HOST) + ret = otg_start_host(fsm, 0); + else if (fsm->protocol == PROTO_GADGET) + ret = otg_start_gadget(fsm, 0); + if (ret) + return ret; + + /* start new protocol */ + if (protocol == PROTO_HOST) + ret = otg_start_host(fsm, 1); + else if (protocol == PROTO_GADGET) + ret = otg_start_gadget(fsm, 1); + if (ret) + return ret; + + fsm->protocol = protocol; + return 0; + } + + return 0; +} + +/* Called when leaving a state. Do state clean up jobs here */ +static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state) +{ + switch (old_state) { + case OTG_STATE_B_IDLE: + otg_del_timer(fsm, B_SE0_SRP); + fsm->b_se0_srp = 0; + fsm->adp_sns = 0; + fsm->adp_prb = 0; + break; + case OTG_STATE_B_SRP_INIT: + fsm->data_pulse = 0; + fsm->b_srp_done = 0; + break; + case OTG_STATE_B_PERIPHERAL: + if (fsm->otg->gadget) + fsm->otg->gadget->host_request_flag = 0; + break; + case OTG_STATE_B_WAIT_ACON: + otg_del_timer(fsm, B_ASE0_BRST); + fsm->b_ase0_brst_tmout = 0; + break; + case OTG_STATE_B_HOST: + break; + case OTG_STATE_A_IDLE: + fsm->adp_prb = 0; + break; + case OTG_STATE_A_WAIT_VRISE: + otg_del_timer(fsm, A_WAIT_VRISE); + fsm->a_wait_vrise_tmout = 0; + break; + case OTG_STATE_A_WAIT_BCON: + otg_del_timer(fsm, A_WAIT_BCON); + fsm->a_wait_bcon_tmout = 0; + break; + case OTG_STATE_A_HOST: + otg_del_timer(fsm, A_WAIT_ENUM); + break; + case OTG_STATE_A_SUSPEND: + otg_del_timer(fsm, A_AIDL_BDIS); + fsm->a_aidl_bdis_tmout = 0; + fsm->a_suspend_req_inf = 0; + break; + case OTG_STATE_A_PERIPHERAL: + otg_del_timer(fsm, A_BIDL_ADIS); + fsm->a_bidl_adis_tmout = 0; + if (fsm->otg->gadget) + fsm->otg->gadget->host_request_flag = 0; + break; + case OTG_STATE_A_WAIT_VFALL: + otg_del_timer(fsm, A_WAIT_VFALL); + fsm->a_wait_vfall_tmout = 0; + otg_del_timer(fsm, A_WAIT_VRISE); + break; + case OTG_STATE_A_VBUS_ERR: + break; + default: + break; + } +} + +static void otg_hnp_polling_work(struct work_struct *work) +{ + struct otg_fsm *fsm = container_of(to_delayed_work(work), + struct otg_fsm, hnp_polling_work); + struct usb_device *udev; + enum usb_otg_state state = fsm->otg->state; + u8 flag; + int retval; + + if (state != OTG_STATE_A_HOST && state != OTG_STATE_B_HOST) + return; + + udev = usb_hub_find_child(fsm->otg->host->root_hub, 1); + if (!udev) { + dev_err(fsm->otg->host->controller, + "no usb dev connected, can't start HNP polling\n"); + return; + } + + *fsm->host_req_flag = 0; + /* Get host request flag from connected USB device */ + retval = usb_control_msg(udev, + usb_rcvctrlpipe(udev, 0), + USB_REQ_GET_STATUS, + USB_DIR_IN | USB_RECIP_DEVICE, + 0, + OTG_STS_SELECTOR, + fsm->host_req_flag, + 1, + USB_CTRL_GET_TIMEOUT); + if (retval != 1) { + dev_err(&udev->dev, "Get one byte OTG status failed\n"); + return; + } + + flag = *fsm->host_req_flag; + if (flag == 0) { + /* Continue HNP polling */ + schedule_delayed_work(&fsm->hnp_polling_work, + msecs_to_jiffies(T_HOST_REQ_POLL)); + return; + } else if (flag != HOST_REQUEST_FLAG) { + dev_err(&udev->dev, "host request flag %d is invalid\n", flag); + return; + } + + /* Host request flag is set */ + if (state == OTG_STATE_A_HOST) { + /* Set b_hnp_enable */ + if (!fsm->otg->host->b_hnp_enable) { + retval = usb_control_msg(udev, + usb_sndctrlpipe(udev, 0), + USB_REQ_SET_FEATURE, 0, + USB_DEVICE_B_HNP_ENABLE, + 0, NULL, 0, + USB_CTRL_SET_TIMEOUT); + if (retval >= 0) + fsm->otg->host->b_hnp_enable = 1; + } + fsm->a_bus_req = 0; + } else if (state == OTG_STATE_B_HOST) { + fsm->b_bus_req = 0; + } + + otg_statemachine(fsm); +} + +static void otg_start_hnp_polling(struct otg_fsm *fsm) +{ + /* + * The memory of host_req_flag should be allocated by + * controller driver, otherwise, hnp polling is not started. + */ + if (!fsm->host_req_flag) + return; + + if (!fsm->hnp_work_inited) { + INIT_DELAYED_WORK(&fsm->hnp_polling_work, otg_hnp_polling_work); + fsm->hnp_work_inited = true; + } + + schedule_delayed_work(&fsm->hnp_polling_work, + msecs_to_jiffies(T_HOST_REQ_POLL)); +} + +/* Called when entering a state */ +static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state) +{ + if (fsm->otg->state == new_state) + return 0; + VDBG("Set state: %s\n", usb_otg_state_string(new_state)); + otg_leave_state(fsm, fsm->otg->state); + switch (new_state) { + case OTG_STATE_B_IDLE: + otg_drv_vbus(fsm, 0); + otg_chrg_vbus(fsm, 0); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + /* + * Driver is responsible for starting ADP probing + * if ADP sensing times out. + */ + otg_start_adp_sns(fsm); + otg_set_protocol(fsm, PROTO_UNDEF); + otg_add_timer(fsm, B_SE0_SRP); + break; + case OTG_STATE_B_SRP_INIT: + otg_start_pulse(fsm); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_UNDEF); + otg_add_timer(fsm, B_SRP_FAIL); + break; + case OTG_STATE_B_PERIPHERAL: + otg_chrg_vbus(fsm, 0); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_GADGET); + otg_loc_conn(fsm, 1); + break; + case OTG_STATE_B_WAIT_ACON: + otg_chrg_vbus(fsm, 0); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_HOST); + otg_add_timer(fsm, B_ASE0_BRST); + fsm->a_bus_suspend = 0; + break; + case OTG_STATE_B_HOST: + otg_chrg_vbus(fsm, 0); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 1); + otg_set_protocol(fsm, PROTO_HOST); + usb_bus_start_enum(fsm->otg->host, + fsm->otg->host->otg_port); + otg_start_hnp_polling(fsm); + break; + case OTG_STATE_A_IDLE: + otg_drv_vbus(fsm, 0); + otg_chrg_vbus(fsm, 0); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + otg_start_adp_prb(fsm); + otg_set_protocol(fsm, PROTO_HOST); + break; + case OTG_STATE_A_WAIT_VRISE: + otg_drv_vbus(fsm, 1); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_HOST); + otg_add_timer(fsm, A_WAIT_VRISE); + break; + case OTG_STATE_A_WAIT_BCON: + otg_drv_vbus(fsm, 1); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_HOST); + otg_add_timer(fsm, A_WAIT_BCON); + break; + case OTG_STATE_A_HOST: + otg_drv_vbus(fsm, 1); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 1); + otg_set_protocol(fsm, PROTO_HOST); + /* + * When HNP is triggered while a_bus_req = 0, a_host will + * suspend too fast to complete a_set_b_hnp_en + */ + if (!fsm->a_bus_req || fsm->a_suspend_req_inf) + otg_add_timer(fsm, A_WAIT_ENUM); + otg_start_hnp_polling(fsm); + break; + case OTG_STATE_A_SUSPEND: + otg_drv_vbus(fsm, 1); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_HOST); + otg_add_timer(fsm, A_AIDL_BDIS); + + break; + case OTG_STATE_A_PERIPHERAL: + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_GADGET); + otg_drv_vbus(fsm, 1); + otg_loc_conn(fsm, 1); + otg_add_timer(fsm, A_BIDL_ADIS); + break; + case OTG_STATE_A_WAIT_VFALL: + otg_drv_vbus(fsm, 0); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_HOST); + otg_add_timer(fsm, A_WAIT_VFALL); + break; + case OTG_STATE_A_VBUS_ERR: + otg_drv_vbus(fsm, 0); + otg_loc_conn(fsm, 0); + otg_loc_sof(fsm, 0); + otg_set_protocol(fsm, PROTO_UNDEF); + break; + default: + break; + } + + fsm->otg->state = new_state; + fsm->state_changed = 1; + return 0; +} + +/* State change judgement */ +int otg_statemachine(struct otg_fsm *fsm) +{ + enum usb_otg_state state; + + mutex_lock(&fsm->lock); + + state = fsm->otg->state; + fsm->state_changed = 0; + /* State machine state change judgement */ + + switch (state) { + case OTG_STATE_UNDEFINED: + VDBG("fsm->id = %d\n", fsm->id); + if (fsm->id) + otg_set_state(fsm, OTG_STATE_B_IDLE); + else + otg_set_state(fsm, OTG_STATE_A_IDLE); + break; + case OTG_STATE_B_IDLE: + if (!fsm->id) + otg_set_state(fsm, OTG_STATE_A_IDLE); + else if (fsm->b_sess_vld && fsm->otg->gadget) + otg_set_state(fsm, OTG_STATE_B_PERIPHERAL); + else if ((fsm->b_bus_req || fsm->adp_change || fsm->power_up) && + fsm->b_ssend_srp && fsm->b_se0_srp) + otg_set_state(fsm, OTG_STATE_B_SRP_INIT); + break; + case OTG_STATE_B_SRP_INIT: + if (!fsm->id || fsm->b_srp_done) + otg_set_state(fsm, OTG_STATE_B_IDLE); + break; + case OTG_STATE_B_PERIPHERAL: + if (!fsm->id || !fsm->b_sess_vld) + otg_set_state(fsm, OTG_STATE_B_IDLE); + else if (fsm->b_bus_req && fsm->otg-> + gadget->b_hnp_enable && fsm->a_bus_suspend) + otg_set_state(fsm, OTG_STATE_B_WAIT_ACON); + break; + case OTG_STATE_B_WAIT_ACON: + if (fsm->a_conn) + otg_set_state(fsm, OTG_STATE_B_HOST); + else if (!fsm->id || !fsm->b_sess_vld) + otg_set_state(fsm, OTG_STATE_B_IDLE); + else if (fsm->a_bus_resume || fsm->b_ase0_brst_tmout) { + fsm->b_ase0_brst_tmout = 0; + otg_set_state(fsm, OTG_STATE_B_PERIPHERAL); + } + break; + case OTG_STATE_B_HOST: + if (!fsm->id || !fsm->b_sess_vld) + otg_set_state(fsm, OTG_STATE_B_IDLE); + else if (!fsm->b_bus_req || !fsm->a_conn || fsm->test_device) + otg_set_state(fsm, OTG_STATE_B_PERIPHERAL); + break; + case OTG_STATE_A_IDLE: + if (fsm->id) + otg_set_state(fsm, OTG_STATE_B_IDLE); + else if (!fsm->a_bus_drop && (fsm->a_bus_req || + fsm->a_srp_det || fsm->adp_change || fsm->power_up)) + otg_set_state(fsm, OTG_STATE_A_WAIT_VRISE); + break; + case OTG_STATE_A_WAIT_VRISE: + if (fsm->a_vbus_vld) + otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); + else if (fsm->id || fsm->a_bus_drop || + fsm->a_wait_vrise_tmout) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + break; + case OTG_STATE_A_WAIT_BCON: + if (!fsm->a_vbus_vld) + otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); + else if (fsm->b_conn) + otg_set_state(fsm, OTG_STATE_A_HOST); + else if (fsm->id || fsm->a_bus_drop || fsm->a_wait_bcon_tmout) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + break; + case OTG_STATE_A_HOST: + if (fsm->id || fsm->a_bus_drop) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + else if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) && + fsm->otg->host->b_hnp_enable) + otg_set_state(fsm, OTG_STATE_A_SUSPEND); + else if (!fsm->b_conn) + otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); + else if (!fsm->a_vbus_vld) + otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); + break; + case OTG_STATE_A_SUSPEND: + if (!fsm->b_conn && fsm->otg->host->b_hnp_enable) + otg_set_state(fsm, OTG_STATE_A_PERIPHERAL); + else if (!fsm->b_conn && !fsm->otg->host->b_hnp_enable) + otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); + else if (fsm->a_bus_req || fsm->b_bus_resume) + otg_set_state(fsm, OTG_STATE_A_HOST); + else if (fsm->id || fsm->a_bus_drop || fsm->a_aidl_bdis_tmout) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + else if (!fsm->a_vbus_vld) + otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); + break; + case OTG_STATE_A_PERIPHERAL: + if (fsm->id || fsm->a_bus_drop) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + else if (fsm->a_bidl_adis_tmout || fsm->b_bus_suspend) + otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); + else if (!fsm->a_vbus_vld) + otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); + break; + case OTG_STATE_A_WAIT_VFALL: + if (fsm->a_wait_vfall_tmout) + otg_set_state(fsm, OTG_STATE_A_IDLE); + break; + case OTG_STATE_A_VBUS_ERR: + if (fsm->id || fsm->a_bus_drop || fsm->a_clr_err) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + break; + default: + break; + } + mutex_unlock(&fsm->lock); + + VDBG("quit statemachine, changed = %d\n", fsm->state_changed); + return fsm->state_changed; +} +EXPORT_SYMBOL_GPL(otg_statemachine); +MODULE_LICENSE("GPL"); -- cgit v1.2.3