/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ /* * core.h - DesignWare HS OTG Controller common declarations * * Copyright (C) 2004-2013 Synopsys, Inc. */ #ifndef __DWC2_CORE_H__ #define __DWC2_CORE_H__ #include <linux/acpi.h> #include <linux/phy/phy.h> #include <linux/regulator/consumer.h> #include <linux/usb/gadget.h> #include <linux/usb/otg.h> #include <linux/usb/phy.h> #include "hw.h" /* * Suggested defines for tracers: * - no_printk: Disable tracing * - pr_info: Print this info to the console * - trace_printk: Print this info to trace buffer (good for verbose logging) */ #define DWC2_TRACE_SCHEDULER … #define DWC2_TRACE_SCHEDULER_VB … /* Detailed scheduler tracing, but won't overwhelm console */ #define dwc2_sch_dbg(hsotg, fmt, ...) … /* Verbose scheduler tracing */ #define dwc2_sch_vdbg(hsotg, fmt, ...) … /* Maximum number of Endpoints/HostChannels */ #define MAX_EPS_CHANNELS … /* dwc2-hsotg declarations */ static const char * const dwc2_hsotg_supply_names[] = …; #define DWC2_NUM_SUPPLIES … /* * EP0_MPS_LIMIT * * Unfortunately there seems to be a limit of the amount of data that can * be transferred by IN transactions on EP0. This is either 127 bytes or 3 * packets (which practically means 1 packet and 63 bytes of data) when the * MPS is set to 64. * * This means if we are wanting to move >127 bytes of data, we need to * split the transactions up, but just doing one packet at a time does * not work (this may be an implicit DATA0 PID on first packet of the * transaction) and doing 2 packets is outside the controller's limits. * * If we try to lower the MPS size for EP0, then no transfers work properly * for EP0, and the system will fail basic enumeration. As no cause for this * has currently been found, we cannot support any large IN transfers for * EP0. */ #define EP0_MPS_LIMIT … struct dwc2_hsotg; struct dwc2_hsotg_req; /** * struct dwc2_hsotg_ep - driver endpoint definition. * @ep: The gadget layer representation of the endpoint. * @name: The driver generated name for the endpoint. * @queue: Queue of requests for this endpoint. * @parent: Reference back to the parent device structure. * @req: The current request that the endpoint is processing. This is * used to indicate an request has been loaded onto the endpoint * and has yet to be completed (maybe due to data move, or simply * awaiting an ack from the core all the data has been completed). * @debugfs: File entry for debugfs file for this endpoint. * @dir_in: Set to true if this endpoint is of the IN direction, which * means that it is sending data to the Host. * @map_dir: Set to the value of dir_in when the DMA buffer is mapped. * @index: The index for the endpoint registers. * @mc: Multi Count - number of transactions per microframe * @interval: Interval for periodic endpoints, in frames or microframes. * @name: The name array passed to the USB core. * @halted: Set if the endpoint has been halted. * @periodic: Set if this is a periodic ep, such as Interrupt * @isochronous: Set if this is a isochronous ep * @send_zlp: Set if we need to send a zero-length packet. * @wedged: Set if ep is wedged. * @desc_list_dma: The DMA address of descriptor chain currently in use. * @desc_list: Pointer to descriptor DMA chain head currently in use. * @desc_count: Count of entries within the DMA descriptor chain of EP. * @next_desc: index of next free descriptor in the ISOC chain under SW control. * @compl_desc: index of next descriptor to be completed by xFerComplete * @total_data: The total number of data bytes done. * @fifo_size: The size of the FIFO (for periodic IN endpoints) * @fifo_index: For Dedicated FIFO operation, only FIFO0 can be used for EP0. * @fifo_load: The amount of data loaded into the FIFO (periodic IN) * @last_load: The offset of data for the last start of request. * @size_loaded: The last loaded size for DxEPTSIZE for periodic IN * @target_frame: Targeted frame num to setup next ISOC transfer * @frame_overrun: Indicates SOF number overrun in DSTS * * This is the driver's state for each registered endpoint, allowing it * to keep track of transactions that need doing. Each endpoint has a * lock to protect the state, to try and avoid using an overall lock * for the host controller as much as possible. * * For periodic IN endpoints, we have fifo_size and fifo_load to try * and keep track of the amount of data in the periodic FIFO for each * of these as we don't have a status register that tells us how much * is in each of them. (note, this may actually be useless information * as in shared-fifo mode periodic in acts like a single-frame packet * buffer than a fifo) */ struct dwc2_hsotg_ep { … }; /** * struct dwc2_hsotg_req - data transfer request * @req: The USB gadget request * @queue: The list of requests for the endpoint this is queued for. * @saved_req_buf: variable to save req.buf when bounce buffers are used. */ struct dwc2_hsotg_req { … }; #if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \ IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) #define call_gadget(_hs, _entry) … #else #define call_gadget … #endif struct dwc2_hsotg; struct dwc2_host_chan; /* Device States */ enum dwc2_lx_state { … }; /* Gadget ep0 states */ enum dwc2_ep0_state { … }; /** * struct dwc2_core_params - Parameters for configuring the core * * @otg_caps: Specifies the OTG capabilities. OTG caps from the platform parameters, * used to setup the: * - HNP and SRP capable * - SRP Only capable * - No HNP/SRP capable (always available) * Defaults to best available option * - OTG revision number the device is compliant with, in binary-coded * decimal (i.e. 2.0 is 0200H). (see struct usb_otg_caps) * @host_dma: Specifies whether to use slave or DMA mode for accessing * the data FIFOs. The driver will automatically detect the * value for this parameter if none is specified. * 0 - Slave (always available) * 1 - DMA (default, if available) * @dma_desc_enable: When DMA mode is enabled, specifies whether to use * address DMA mode or descriptor DMA mode for accessing * the data FIFOs. The driver will automatically detect the * value for this if none is specified. * 0 - Address DMA * 1 - Descriptor DMA (default, if available) * @dma_desc_fs_enable: When DMA mode is enabled, specifies whether to use * address DMA mode or descriptor DMA mode for accessing * the data FIFOs in Full Speed mode only. The driver * will automatically detect the value for this if none is * specified. * 0 - Address DMA * 1 - Descriptor DMA in FS (default, if available) * @speed: Specifies the maximum speed of operation in host and * device mode. The actual speed depends on the speed of * the attached device and the value of phy_type. * 0 - High Speed * (default when phy_type is UTMI+ or ULPI) * 1 - Full Speed * (default when phy_type is Full Speed) * @enable_dynamic_fifo: 0 - Use coreConsultant-specified FIFO size parameters * 1 - Allow dynamic FIFO sizing (default, if available) * @en_multiple_tx_fifo: Specifies whether dedicated per-endpoint transmit FIFOs * are enabled for non-periodic IN endpoints in device * mode. * @host_rx_fifo_size: Number of 4-byte words in the Rx FIFO in host mode when * dynamic FIFO sizing is enabled * 16 to 32768 * Actual maximum value is autodetected and also * the default. * @host_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO * in host mode when dynamic FIFO sizing is enabled * 16 to 32768 * Actual maximum value is autodetected and also * the default. * @host_perio_tx_fifo_size: Number of 4-byte words in the periodic Tx FIFO in * host mode when dynamic FIFO sizing is enabled * 16 to 32768 * Actual maximum value is autodetected and also * the default. * @max_transfer_size: The maximum transfer size supported, in bytes * 2047 to 65,535 * Actual maximum value is autodetected and also * the default. * @max_packet_count: The maximum number of packets in a transfer * 15 to 511 * Actual maximum value is autodetected and also * the default. * @host_channels: The number of host channel registers to use * 1 to 16 * Actual maximum value is autodetected and also * the default. * @phy_type: Specifies the type of PHY interface to use. By default, * the driver will automatically detect the phy_type. * 0 - Full Speed Phy * 1 - UTMI+ Phy * 2 - ULPI Phy * Defaults to best available option (2, 1, then 0) * @phy_utmi_width: Specifies the UTMI+ Data Width (in bits). This parameter * is applicable for a phy_type of UTMI+ or ULPI. (For a * ULPI phy_type, this parameter indicates the data width * between the MAC and the ULPI Wrapper.) Also, this * parameter is applicable only if the OTG_HSPHY_WIDTH cC * parameter was set to "8 and 16 bits", meaning that the * core has been configured to work at either data path * width. * 8 or 16 (default 16 if available) * @eusb2_disc: Specifies whether eUSB2 PHY disconnect support flow * applicable or no. Applicable in device mode of HSOTG * and HS IOT cores v5.00 or higher. * 0 - eUSB2 PHY disconnect support flow not applicable * 1 - eUSB2 PHY disconnect support flow applicable * @phy_ulpi_ddr: Specifies whether the ULPI operates at double or single * data rate. This parameter is only applicable if phy_type * is ULPI. * 0 - single data rate ULPI interface with 8 bit wide * data bus (default) * 1 - double data rate ULPI interface with 4 bit wide * data bus * @phy_ulpi_ext_vbus: For a ULPI phy, specifies whether to use the internal or * external supply to drive the VBus * 0 - Internal supply (default) * 1 - External supply * @i2c_enable: Specifies whether to use the I2Cinterface for a full * speed PHY. This parameter is only applicable if phy_type * is FS. * 0 - No (default) * 1 - Yes * @ipg_isoc_en: Indicates the IPG supports is enabled or disabled. * 0 - Disable (default) * 1 - Enable * @acg_enable: For enabling Active Clock Gating in the controller * 0 - No * 1 - Yes * @ulpi_fs_ls: Make ULPI phy operate in FS/LS mode only * 0 - No (default) * 1 - Yes * @host_support_fs_ls_low_power: Specifies whether low power mode is supported * when attached to a Full Speed or Low Speed device in * host mode. * 0 - Don't support low power mode (default) * 1 - Support low power mode * @host_ls_low_power_phy_clk: Specifies the PHY clock rate in low power mode * when connected to a Low Speed device in host * mode. This parameter is applicable only if * host_support_fs_ls_low_power is enabled. * 0 - 48 MHz * (default when phy_type is UTMI+ or ULPI) * 1 - 6 MHz * (default when phy_type is Full Speed) * @oc_disable: Flag to disable overcurrent condition. * 0 - Allow overcurrent condition to get detected * 1 - Disable overcurrent condtion to get detected * @ts_dline: Enable Term Select Dline pulsing * 0 - No (default) * 1 - Yes * @reload_ctl: Allow dynamic reloading of HFIR register during runtime * 0 - No (default for core < 2.92a) * 1 - Yes (default for core >= 2.92a) * @ahbcfg: This field allows the default value of the GAHBCFG * register to be overridden * -1 - GAHBCFG value will be set to 0x06 * (INCR, default) * all others - GAHBCFG value will be overridden with * this value * Not all bits can be controlled like this, the * bits defined by GAHBCFG_CTRL_MASK are controlled * by the driver and are ignored in this * configuration value. * @uframe_sched: True to enable the microframe scheduler * @external_id_pin_ctl: Specifies whether ID pin is handled externally. * Disable CONIDSTSCHNG controller interrupt in such * case. * 0 - No (default) * 1 - Yes * @power_down: Specifies whether the controller support power_down. * If power_down is enabled, the controller will enter * power_down in both peripheral and host mode when * needed. * 0 - No (default) * 1 - Partial power down * 2 - Hibernation * @no_clock_gating: Specifies whether to avoid clock gating feature. * 0 - No (use clock gating) * 1 - Yes (avoid it) * @lpm: Enable LPM support. * 0 - No * 1 - Yes * @lpm_clock_gating: Enable core PHY clock gating. * 0 - No * 1 - Yes * @besl: Enable LPM Errata support. * 0 - No * 1 - Yes * @hird_threshold_en: HIRD or HIRD Threshold enable. * 0 - No * 1 - Yes * @hird_threshold: Value of BESL or HIRD Threshold. * @ref_clk_per: Indicates in terms of pico seconds the period * of ref_clk. * 62500 - 16MHz * 58823 - 17MHz * 52083 - 19.2MHz * 50000 - 20MHz * 41666 - 24MHz * 33333 - 30MHz (default) * 25000 - 40MHz * @sof_cnt_wkup_alert: Indicates in term of number of SOF's after which * the controller should generate an interrupt if the * device had been in L1 state until that period. * This is used by SW to initiate Remote WakeUp in the * controller so as to sync to the uF number from the host. * @activate_stm_fs_transceiver: Activate internal transceiver using GGPIO * register. * 0 - Deactivate the transceiver (default) * 1 - Activate the transceiver * @activate_stm_id_vb_detection: Activate external ID pin and Vbus level * detection using GGPIO register. * 0 - Deactivate the external level detection (default) * 1 - Activate the external level detection * @activate_ingenic_overcurrent_detection: Activate Ingenic overcurrent * detection. * 0 - Deactivate the overcurrent detection * 1 - Activate the overcurrent detection (default) * @g_dma: Enables gadget dma usage (default: autodetect). * @g_dma_desc: Enables gadget descriptor DMA (default: autodetect). * @g_rx_fifo_size: The periodic rx fifo size for the device, in * DWORDS from 16-32768 (default: 2048 if * possible, otherwise autodetect). * @g_np_tx_fifo_size: The non-periodic tx fifo size for the device in * DWORDS from 16-32768 (default: 1024 if * possible, otherwise autodetect). * @g_tx_fifo_size: An array of TX fifo sizes in dedicated fifo * mode. Each value corresponds to one EP * starting from EP1 (max 15 values). Sizes are * in DWORDS with possible values from * 16-32768 (default: 256, 256, 256, 256, 768, * 768, 768, 768, 0, 0, 0, 0, 0, 0, 0). * @change_speed_quirk: Change speed configuration to DWC2_SPEED_PARAM_FULL * while full&low speed device connect. And change speed * back to DWC2_SPEED_PARAM_HIGH while device is gone. * 0 - No (default) * 1 - Yes * @service_interval: Enable service interval based scheduling. * 0 - No * 1 - Yes * * The following parameters may be specified when starting the module. These * parameters define how the DWC_otg controller should be configured. A * value of -1 (or any other out of range value) for any parameter means * to read the value from hardware (if possible) or use the builtin * default described above. */ struct dwc2_core_params { … }; /** * struct dwc2_hw_params - Autodetected parameters. * * These parameters are the various parameters read from hardware * registers during initialization. They typically contain the best * supported or maximum value that can be configured in the * corresponding dwc2_core_params value. * * The values that are not in dwc2_core_params are documented below. * * @op_mode: Mode of Operation * 0 - HNP- and SRP-Capable OTG (Host & Device) * 1 - SRP-Capable OTG (Host & Device) * 2 - Non-HNP and Non-SRP Capable OTG (Host & Device) * 3 - SRP-Capable Device * 4 - Non-OTG Device * 5 - SRP-Capable Host * 6 - Non-OTG Host * @arch: Architecture * 0 - Slave only * 1 - External DMA * 2 - Internal DMA * @ipg_isoc_en: This feature indicates that the controller supports * the worst-case scenario of Rx followed by Rx * Interpacket Gap (IPG) (32 bitTimes) as per the utmi * specification for any token following ISOC OUT token. * 0 - Don't support * 1 - Support * @power_optimized: Are power optimizations enabled? * @num_dev_ep: Number of device endpoints available * @num_dev_in_eps: Number of device IN endpoints available * @num_dev_perio_in_ep: Number of device periodic IN endpoints * available * @dev_token_q_depth: Device Mode IN Token Sequence Learning Queue * Depth * 0 to 30 * @host_perio_tx_q_depth: * Host Mode Periodic Request Queue Depth * 2, 4 or 8 * @nperio_tx_q_depth: * Non-Periodic Request Queue Depth * 2, 4 or 8 * @hs_phy_type: High-speed PHY interface type * 0 - High-speed interface not supported * 1 - UTMI+ * 2 - ULPI * 3 - UTMI+ and ULPI * @fs_phy_type: Full-speed PHY interface type * 0 - Full speed interface not supported * 1 - Dedicated full speed interface * 2 - FS pins shared with UTMI+ pins * 3 - FS pins shared with ULPI pins * @total_fifo_size: Total internal RAM for FIFOs (bytes) * @hibernation: Is hibernation enabled? * @utmi_phy_data_width: UTMI+ PHY data width * 0 - 8 bits * 1 - 16 bits * 2 - 8 or 16 bits * @snpsid: Value from SNPSID register * @dev_ep_dirs: Direction of device endpoints (GHWCFG1) * @g_tx_fifo_size: Power-on values of TxFIFO sizes * @dma_desc_enable: When DMA mode is enabled, specifies whether to use * address DMA mode or descriptor DMA mode for accessing * the data FIFOs. The driver will automatically detect the * value for this if none is specified. * 0 - Address DMA * 1 - Descriptor DMA (default, if available) * @enable_dynamic_fifo: 0 - Use coreConsultant-specified FIFO size parameters * 1 - Allow dynamic FIFO sizing (default, if available) * @en_multiple_tx_fifo: Specifies whether dedicated per-endpoint transmit FIFOs * are enabled for non-periodic IN endpoints in device * mode. * @host_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO * in host mode when dynamic FIFO sizing is enabled * 16 to 32768 * Actual maximum value is autodetected and also * the default. * @host_perio_tx_fifo_size: Number of 4-byte words in the periodic Tx FIFO in * host mode when dynamic FIFO sizing is enabled * 16 to 32768 * Actual maximum value is autodetected and also * the default. * @max_transfer_size: The maximum transfer size supported, in bytes * 2047 to 65,535 * Actual maximum value is autodetected and also * the default. * @max_packet_count: The maximum number of packets in a transfer * 15 to 511 * Actual maximum value is autodetected and also * the default. * @host_channels: The number of host channel registers to use * 1 to 16 * Actual maximum value is autodetected and also * the default. * @dev_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO * in device mode when dynamic FIFO sizing is enabled * 16 to 32768 * Actual maximum value is autodetected and also * the default. * @i2c_enable: Specifies whether to use the I2Cinterface for a full * speed PHY. This parameter is only applicable if phy_type * is FS. * 0 - No (default) * 1 - Yes * @acg_enable: For enabling Active Clock Gating in the controller * 0 - Disable * 1 - Enable * @lpm_mode: For enabling Link Power Management in the controller * 0 - Disable * 1 - Enable * @rx_fifo_size: Number of 4-byte words in the Rx FIFO when dynamic * FIFO sizing is enabled 16 to 32768 * Actual maximum value is autodetected and also * the default. * @service_interval_mode: For enabling service interval based scheduling in the * controller. * 0 - Disable * 1 - Enable */ struct dwc2_hw_params { … }; /* Size of control and EP0 buffers */ #define DWC2_CTRL_BUFF_SIZE … /** * struct dwc2_gregs_backup - Holds global registers state before * entering partial power down * @gotgctl: Backup of GOTGCTL register * @gintmsk: Backup of GINTMSK register * @gahbcfg: Backup of GAHBCFG register * @gusbcfg: Backup of GUSBCFG register * @grxfsiz: Backup of GRXFSIZ register * @gnptxfsiz: Backup of GNPTXFSIZ register * @gi2cctl: Backup of GI2CCTL register * @glpmcfg: Backup of GLPMCFG register * @gdfifocfg: Backup of GDFIFOCFG register * @pcgcctl: Backup of PCGCCTL register * @pcgcctl1: Backup of PCGCCTL1 register * @dtxfsiz: Backup of DTXFSIZ registers for each endpoint * @gpwrdn: Backup of GPWRDN register * @valid: True if registers values backuped. */ struct dwc2_gregs_backup { … }; /** * struct dwc2_dregs_backup - Holds device registers state before * entering partial power down * @dcfg: Backup of DCFG register * @dctl: Backup of DCTL register * @daintmsk: Backup of DAINTMSK register * @diepmsk: Backup of DIEPMSK register * @doepmsk: Backup of DOEPMSK register * @diepctl: Backup of DIEPCTL register * @dieptsiz: Backup of DIEPTSIZ register * @diepdma: Backup of DIEPDMA register * @doepctl: Backup of DOEPCTL register * @doeptsiz: Backup of DOEPTSIZ register * @doepdma: Backup of DOEPDMA register * @dtxfsiz: Backup of DTXFSIZ registers for each endpoint * @valid: True if registers values backuped. */ struct dwc2_dregs_backup { … }; /** * struct dwc2_hregs_backup - Holds host registers state before * entering partial power down * @hcfg: Backup of HCFG register * @hflbaddr: Backup of HFLBADDR register * @haintmsk: Backup of HAINTMSK register * @hcchar: Backup of HCCHAR register * @hcsplt: Backup of HCSPLT register * @hcintmsk: Backup of HCINTMSK register * @hctsiz: Backup of HCTSIZ register * @hdma: Backup of HCDMA register * @hcdmab: Backup of HCDMAB register * @hprt0: Backup of HPTR0 register * @hfir: Backup of HFIR register * @hptxfsiz: Backup of HPTXFSIZ register * @valid: True if registers values backuped. */ struct dwc2_hregs_backup { … }; /* * Constants related to high speed periodic scheduling * * We have a periodic schedule that is DWC2_HS_SCHEDULE_UFRAMES long. From a * reservation point of view it's assumed that the schedule goes right back to * the beginning after the end of the schedule. * * What does that mean for scheduling things with a long interval? It means * we'll reserve time for them in every possible microframe that they could * ever be scheduled in. ...but we'll still only actually schedule them as * often as they were requested. * * We keep our schedule in a "bitmap" structure. This simplifies having * to keep track of and merge intervals: we just let the bitmap code do most * of the heavy lifting. In a way scheduling is much like memory allocation. * * We schedule 100us per uframe or 80% of 125us (the maximum amount you're * supposed to schedule for periodic transfers). That's according to spec. * * Note that though we only schedule 80% of each microframe, the bitmap that we * keep the schedule in is tightly packed (AKA it doesn't have 100us worth of * space for each uFrame). * * Requirements: * - DWC2_HS_SCHEDULE_UFRAMES must even divide 0x4000 (HFNUM_MAX_FRNUM + 1) * - DWC2_HS_SCHEDULE_UFRAMES must be 8 times DWC2_LS_SCHEDULE_FRAMES (probably * could be any multiple of 8 times DWC2_LS_SCHEDULE_FRAMES, but there might * be bugs). The 8 comes from the USB spec: number of microframes per frame. */ #define DWC2_US_PER_UFRAME … #define DWC2_HS_PERIODIC_US_PER_UFRAME … #define DWC2_HS_SCHEDULE_UFRAMES … #define DWC2_HS_SCHEDULE_US … /* * Constants related to low speed scheduling * * For high speed we schedule every 1us. For low speed that's a bit overkill, * so we make up a unit called a "slice" that's worth 25us. There are 40 * slices in a full frame and we can schedule 36 of those (90%) for periodic * transfers. * * Our low speed schedule can be as short as 1 frame or could be longer. When * we only schedule 1 frame it means that we'll need to reserve a time every * frame even for things that only transfer very rarely, so something that runs * every 2048 frames will get time reserved in every frame. Our low speed * schedule can be longer and we'll be able to handle more overlap, but that * will come at increased memory cost and increased time to schedule. * * Note: one other advantage of a short low speed schedule is that if we mess * up and miss scheduling we can jump in and use any of the slots that we * happened to reserve. * * With 25 us per slice and 1 frame in the schedule, we only need 4 bytes for * the schedule. There will be one schedule per TT. * * Requirements: * - DWC2_US_PER_SLICE must evenly divide DWC2_LS_PERIODIC_US_PER_FRAME. */ #define DWC2_US_PER_SLICE … #define DWC2_SLICES_PER_UFRAME … #define DWC2_ROUND_US_TO_SLICE(us) … #define DWC2_LS_PERIODIC_US_PER_FRAME … #define DWC2_LS_PERIODIC_SLICES_PER_FRAME … #define DWC2_LS_SCHEDULE_FRAMES … #define DWC2_LS_SCHEDULE_SLICES … /** * struct dwc2_hsotg - Holds the state of the driver, including the non-periodic * and periodic schedules * * These are common for both host and peripheral modes: * * @dev: The struct device pointer * @regs: Pointer to controller regs * @hw_params: Parameters that were autodetected from the * hardware registers * @params: Parameters that define how the core should be configured * @op_state: The operational State, during transitions (a_host=> * a_peripheral and b_device=>b_host) this may not match * the core, but allows the software to determine * transitions * @dr_mode: Requested mode of operation, one of following: * - USB_DR_MODE_PERIPHERAL * - USB_DR_MODE_HOST * - USB_DR_MODE_OTG * @role_sw: usb_role_switch handle * @role_sw_default_mode: default operation mode of controller while usb role * is USB_ROLE_NONE * @hcd_enabled: Host mode sub-driver initialization indicator. * @gadget_enabled: Peripheral mode sub-driver initialization indicator. * @ll_hw_enabled: Status of low-level hardware resources. * @hibernated: True if core is hibernated * @in_ppd: True if core is partial power down mode. * @bus_suspended: True if bus is suspended * @reset_phy_on_wake: Quirk saying that we should assert PHY reset on a * remote wakeup. * @phy_off_for_suspend: Status of whether we turned the PHY off at suspend. * @need_phy_for_wake: Quirk saying that we should keep the PHY on at * suspend if we need USB to wake us up. * @frame_number: Frame number read from the core. For both device * and host modes. The value ranges are from 0 * to HFNUM_MAX_FRNUM. * @phy: The otg phy transceiver structure for phy control. * @uphy: The otg phy transceiver structure for old USB phy * control. * @plat: The platform specific configuration data. This can be * removed once all SoCs support usb transceiver. * @supplies: Definition of USB power supplies * @vbus_supply: Regulator supplying vbus. * @usb33d: Optional 3.3v regulator used on some stm32 devices to * supply ID and VBUS detection hardware. * @lock: Spinlock that protects all the driver data structures * @priv: Stores a pointer to the struct usb_hcd * @queuing_high_bandwidth: True if multiple packets of a high-bandwidth * transfer are in process of being queued * @srp_success: Stores status of SRP request in the case of a FS PHY * with an I2C interface * @wq_otg: Workqueue object used for handling of some interrupts * @wf_otg: Work object for handling Connector ID Status Change * interrupt * @wkp_timer: Timer object for handling Wakeup Detected interrupt * @lx_state: Lx state of connected device * @gr_backup: Backup of global registers during suspend * @dr_backup: Backup of device registers during suspend * @hr_backup: Backup of host registers during suspend * @needs_byte_swap: Specifies whether the opposite endianness. * * These are for host mode: * * @flags: Flags for handling root port state changes * @flags.d32: Contain all root port flags * @flags.b: Separate root port flags from each other * @flags.b.port_connect_status_change: True if root port connect status * changed * @flags.b.port_connect_status: True if device connected to root port * @flags.b.port_reset_change: True if root port reset status changed * @flags.b.port_enable_change: True if root port enable status changed * @flags.b.port_suspend_change: True if root port suspend status changed * @flags.b.port_over_current_change: True if root port over current state * changed. * @flags.b.port_l1_change: True if root port l1 status changed * @flags.b.reserved: Reserved bits of root port register * @non_periodic_sched_inactive: Inactive QHs in the non-periodic schedule. * Transfers associated with these QHs are not currently * assigned to a host channel. * @non_periodic_sched_active: Active QHs in the non-periodic schedule. * Transfers associated with these QHs are currently * assigned to a host channel. * @non_periodic_qh_ptr: Pointer to next QH to process in the active * non-periodic schedule * @non_periodic_sched_waiting: Waiting QHs in the non-periodic schedule. * Transfers associated with these QHs are not currently * assigned to a host channel. * @periodic_sched_inactive: Inactive QHs in the periodic schedule. This is a * list of QHs for periodic transfers that are _not_ * scheduled for the next frame. Each QH in the list has an * interval counter that determines when it needs to be * scheduled for execution. This scheduling mechanism * allows only a simple calculation for periodic bandwidth * used (i.e. must assume that all periodic transfers may * need to execute in the same frame). However, it greatly * simplifies scheduling and should be sufficient for the * vast majority of OTG hosts, which need to connect to a * small number of peripherals at one time. Items move from * this list to periodic_sched_ready when the QH interval * counter is 0 at SOF. * @periodic_sched_ready: List of periodic QHs that are ready for execution in * the next frame, but have not yet been assigned to host * channels. Items move from this list to * periodic_sched_assigned as host channels become * available during the current frame. * @periodic_sched_assigned: List of periodic QHs to be executed in the next * frame that are assigned to host channels. Items move * from this list to periodic_sched_queued as the * transactions for the QH are queued to the DWC_otg * controller. * @periodic_sched_queued: List of periodic QHs that have been queued for * execution. Items move from this list to either * periodic_sched_inactive or periodic_sched_ready when the * channel associated with the transfer is released. If the * interval for the QH is 1, the item moves to * periodic_sched_ready because it must be rescheduled for * the next frame. Otherwise, the item moves to * periodic_sched_inactive. * @split_order: List keeping track of channels doing splits, in order. * @periodic_usecs: Total bandwidth claimed so far for periodic transfers. * This value is in microseconds per (micro)frame. The * assumption is that all periodic transfers may occur in * the same (micro)frame. * @hs_periodic_bitmap: Bitmap used by the microframe scheduler any time the * host is in high speed mode; low speed schedules are * stored elsewhere since we need one per TT. * @periodic_qh_count: Count of periodic QHs, if using several eps. Used for * SOF enable/disable. * @free_hc_list: Free host channels in the controller. This is a list of * struct dwc2_host_chan items. * @periodic_channels: Number of host channels assigned to periodic transfers. * Currently assuming that there is a dedicated host * channel for each periodic transaction and at least one * host channel is available for non-periodic transactions. * @non_periodic_channels: Number of host channels assigned to non-periodic * transfers * @available_host_channels: Number of host channels available for the * microframe scheduler to use * @hc_ptr_array: Array of pointers to the host channel descriptors. * Allows accessing a host channel descriptor given the * host channel number. This is useful in interrupt * handlers. * @status_buf: Buffer used for data received during the status phase of * a control transfer. * @status_buf_dma: DMA address for status_buf * @start_work: Delayed work for handling host A-cable connection * @reset_work: Delayed work for handling a port reset * @phy_reset_work: Work structure for doing a PHY reset * @otg_port: OTG port number * @frame_list: Frame list * @frame_list_dma: Frame list DMA address * @frame_list_sz: Frame list size * @desc_gen_cache: Kmem cache for generic descriptors * @desc_hsisoc_cache: Kmem cache for hs isochronous descriptors * @unaligned_cache: Kmem cache for DMA mode to handle non-aligned buf * * These are for peripheral mode: * * @driver: USB gadget driver * @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos. * @num_of_eps: Number of available EPs (excluding EP0) * @debug_root: Root directrory for debugfs. * @ep0_reply: Request used for ep0 reply. * @ep0_buff: Buffer for EP0 reply data, if needed. * @ctrl_buff: Buffer for EP0 control requests. * @ctrl_req: Request for EP0 control packets. * @ep0_state: EP0 control transfers state * @delayed_status: true when gadget driver asks for delayed status * @test_mode: USB test mode requested by the host * @remote_wakeup_allowed: True if device is allowed to wake-up host by * remote-wakeup signalling * @setup_desc_dma: EP0 setup stage desc chain DMA address * @setup_desc: EP0 setup stage desc chain pointer * @ctrl_in_desc_dma: EP0 IN data phase desc chain DMA address * @ctrl_in_desc: EP0 IN data phase desc chain pointer * @ctrl_out_desc_dma: EP0 OUT data phase desc chain DMA address * @ctrl_out_desc: EP0 OUT data phase desc chain pointer * @irq: Interrupt request line number * @clk: Pointer to otg clock * @utmi_clk: Pointer to utmi_clk clock * @reset: Pointer to dwc2 reset controller * @reset_ecc: Pointer to dwc2 optional reset controller in Stratix10. * @regset: A pointer to a struct debugfs_regset32, which contains * a pointer to an array of register definitions, the * array size and the base address where the register bank * is to be found. * @last_frame_num: Number of last frame. Range from 0 to 32768 * @frame_num_array: Used only if CONFIG_USB_DWC2_TRACK_MISSED_SOFS is * defined, for missed SOFs tracking. Array holds that * frame numbers, which not equal to last_frame_num +1 * @last_frame_num_array: Used only if CONFIG_USB_DWC2_TRACK_MISSED_SOFS is * defined, for missed SOFs tracking. * If current_frame_number != last_frame_num+1 * then last_frame_num added to this array * @frame_num_idx: Actual size of frame_num_array and last_frame_num_array * @dumped_frame_num_array: 1 - if missed SOFs frame numbers dumbed * 0 - if missed SOFs frame numbers not dumbed * @fifo_mem: Total internal RAM for FIFOs (bytes) * @fifo_map: Each bit intend for concrete fifo. If that bit is set, * then that fifo is used * @gadget: Represents a usb gadget device * @connected: Used in slave mode. True if device connected with host * @eps_in: The IN endpoints being supplied to the gadget framework * @eps_out: The OUT endpoints being supplied to the gadget framework * @new_connection: Used in host mode. True if there are new connected * device * @enabled: Indicates the enabling state of controller * */ struct dwc2_hsotg { … }; /* Normal architectures just use readl/write */ static inline u32 dwc2_readl(struct dwc2_hsotg *hsotg, u32 offset) { … } static inline void dwc2_writel(struct dwc2_hsotg *hsotg, u32 value, u32 offset) { … } static inline void dwc2_readl_rep(struct dwc2_hsotg *hsotg, u32 offset, void *buffer, unsigned int count) { … } static inline void dwc2_writel_rep(struct dwc2_hsotg *hsotg, u32 offset, const void *buffer, unsigned int count) { … } /* Reasons for halting a host channel */ enum dwc2_halt_status { … }; /* Core version information */ static inline bool dwc2_is_iot(struct dwc2_hsotg *hsotg) { … } static inline bool dwc2_is_fs_iot(struct dwc2_hsotg *hsotg) { … } static inline bool dwc2_is_hs_iot(struct dwc2_hsotg *hsotg) { … } /* * The following functions support initialization of the core driver component * and the DWC_otg controller */ int dwc2_core_reset(struct dwc2_hsotg *hsotg, bool skip_wait); int dwc2_enter_partial_power_down(struct dwc2_hsotg *hsotg); int dwc2_exit_partial_power_down(struct dwc2_hsotg *hsotg, int rem_wakeup, bool restore); int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg, int is_host); int dwc2_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, int reset, int is_host); void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg); int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy); void dwc2_force_mode(struct dwc2_hsotg *hsotg, bool host); void dwc2_force_dr_mode(struct dwc2_hsotg *hsotg); bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg); int dwc2_check_core_version(struct dwc2_hsotg *hsotg); /* * Common core Functions. * The following functions support managing the DWC_otg controller in either * device or host mode. */ void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes); void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num); void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg); void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd); void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd); void dwc2_hib_restore_common(struct dwc2_hsotg *hsotg, int rem_wakeup, int is_host); int dwc2_backup_global_registers(struct dwc2_hsotg *hsotg); int dwc2_restore_global_registers(struct dwc2_hsotg *hsotg); void dwc2_enable_acg(struct dwc2_hsotg *hsotg); void dwc2_wakeup_from_lpm_l1(struct dwc2_hsotg *hsotg, bool remotewakeup); /* This function should be called on every hardware interrupt. */ irqreturn_t dwc2_handle_common_intr(int irq, void *dev); /* The device ID match table */ extern const struct of_device_id dwc2_of_match_table[]; extern const struct acpi_device_id dwc2_acpi_match[]; extern const struct pci_device_id dwc2_pci_ids[]; int dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg); int dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg); /* Common polling functions */ int dwc2_hsotg_wait_bit_set(struct dwc2_hsotg *hs_otg, u32 reg, u32 bit, u32 timeout); int dwc2_hsotg_wait_bit_clear(struct dwc2_hsotg *hs_otg, u32 reg, u32 bit, u32 timeout); /* Parameters */ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg); int dwc2_init_params(struct dwc2_hsotg *hsotg); /* * The following functions check the controller's OTG operation mode * capability (GHWCFG2.OTG_MODE). * * These functions can be used before the internal hsotg->hw_params * are read in and cached so they always read directly from the * GHWCFG2 register. */ unsigned int dwc2_op_mode(struct dwc2_hsotg *hsotg); bool dwc2_hw_is_otg(struct dwc2_hsotg *hsotg); bool dwc2_hw_is_host(struct dwc2_hsotg *hsotg); bool dwc2_hw_is_device(struct dwc2_hsotg *hsotg); /* * Returns the mode of operation, host or device */ static inline int dwc2_is_host_mode(struct dwc2_hsotg *hsotg) { … } static inline int dwc2_is_device_mode(struct dwc2_hsotg *hsotg) { … } int dwc2_drd_init(struct dwc2_hsotg *hsotg); void dwc2_drd_suspend(struct dwc2_hsotg *hsotg); void dwc2_drd_resume(struct dwc2_hsotg *hsotg); void dwc2_drd_exit(struct dwc2_hsotg *hsotg); /* * Dump core registers and SPRAM */ void dwc2_dump_dev_registers(struct dwc2_hsotg *hsotg); void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg); void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg); /* Gadget defines */ #if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \ IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) int dwc2_hsotg_remove(struct dwc2_hsotg *hsotg); int dwc2_hsotg_suspend(struct dwc2_hsotg *dwc2); int dwc2_hsotg_resume(struct dwc2_hsotg *dwc2); int dwc2_gadget_init(struct dwc2_hsotg *hsotg); void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2, bool reset); void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg); void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg); void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2); int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode); #define dwc2_is_device_connected(hsotg) … #define dwc2_is_device_enabled(hsotg) … int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg); int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg, int remote_wakeup); int dwc2_gadget_enter_hibernation(struct dwc2_hsotg *hsotg); int dwc2_gadget_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, int reset); int dwc2_gadget_enter_partial_power_down(struct dwc2_hsotg *hsotg); int dwc2_gadget_exit_partial_power_down(struct dwc2_hsotg *hsotg, bool restore); void dwc2_gadget_enter_clock_gating(struct dwc2_hsotg *hsotg); void dwc2_gadget_exit_clock_gating(struct dwc2_hsotg *hsotg, int rem_wakeup); int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg); int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg); int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg); void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg); void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg); static inline void dwc2_clear_fifo_map(struct dwc2_hsotg *hsotg) { … } #else static inline int dwc2_hsotg_remove(struct dwc2_hsotg *dwc2) { return 0; } static inline int dwc2_hsotg_suspend(struct dwc2_hsotg *dwc2) { return 0; } static inline int dwc2_hsotg_resume(struct dwc2_hsotg *dwc2) { return 0; } static inline int dwc2_gadget_init(struct dwc2_hsotg *hsotg) { return 0; } static inline void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *dwc2, bool reset) {} static inline void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg) {} static inline void dwc2_hsotg_core_connect(struct dwc2_hsotg *hsotg) {} static inline void dwc2_hsotg_disconnect(struct dwc2_hsotg *dwc2) {} static inline int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, int testmode) { return 0; } #define dwc2_is_device_connected … #define dwc2_is_device_enabled … static inline int dwc2_backup_device_registers(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_restore_device_registers(struct dwc2_hsotg *hsotg, int remote_wakeup) { return 0; } static inline int dwc2_gadget_enter_hibernation(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_gadget_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, int reset) { return 0; } static inline int dwc2_gadget_enter_partial_power_down(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_gadget_exit_partial_power_down(struct dwc2_hsotg *hsotg, bool restore) { return 0; } static inline void dwc2_gadget_enter_clock_gating(struct dwc2_hsotg *hsotg) {} static inline void dwc2_gadget_exit_clock_gating(struct dwc2_hsotg *hsotg, int rem_wakeup) {} static inline int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg) { return 0; } static inline void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg) {} static inline void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg) {} static inline void dwc2_clear_fifo_map(struct dwc2_hsotg *hsotg) {} #endif #if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg); int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, int us); void dwc2_hcd_connect(struct dwc2_hsotg *hsotg); void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force); void dwc2_hcd_start(struct dwc2_hsotg *hsotg); int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup); int dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex); int dwc2_port_resume(struct dwc2_hsotg *hsotg); int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg); int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg); int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg); int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, int reset); int dwc2_host_enter_partial_power_down(struct dwc2_hsotg *hsotg); int dwc2_host_exit_partial_power_down(struct dwc2_hsotg *hsotg, int rem_wakeup, bool restore); void dwc2_host_enter_clock_gating(struct dwc2_hsotg *hsotg); void dwc2_host_exit_clock_gating(struct dwc2_hsotg *hsotg, int rem_wakeup); bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2); static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg) { … } #else static inline int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, int us) { return 0; } static inline void dwc2_hcd_connect(struct dwc2_hsotg *hsotg) {} static inline void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force) {} static inline void dwc2_hcd_start(struct dwc2_hsotg *hsotg) {} static inline void dwc2_hcd_remove(struct dwc2_hsotg *hsotg) {} static inline int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup) { return 0; } static inline int dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex) { return 0; } static inline int dwc2_port_resume(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_hcd_init(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_backup_host_registers(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_restore_host_registers(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_host_enter_hibernation(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_host_exit_hibernation(struct dwc2_hsotg *hsotg, int rem_wakeup, int reset) { return 0; } static inline int dwc2_host_enter_partial_power_down(struct dwc2_hsotg *hsotg) { return 0; } static inline int dwc2_host_exit_partial_power_down(struct dwc2_hsotg *hsotg, int rem_wakeup, bool restore) { return 0; } static inline void dwc2_host_enter_clock_gating(struct dwc2_hsotg *hsotg) {} static inline void dwc2_host_exit_clock_gating(struct dwc2_hsotg *hsotg, int rem_wakeup) {} static inline bool dwc2_host_can_poweroff_phy(struct dwc2_hsotg *dwc2) { return false; } static inline void dwc2_host_schedule_phy_reset(struct dwc2_hsotg *hsotg) {} #endif #endif /* __DWC2_CORE_H__ */
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