/** * gadget.h - DesignWare USB3 DRD Gadget Header * * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com * * Authors: Felipe Balbi , * Sebastian Andrzej Siewior * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The names of the above-listed copyright holders may not be used * to endorse or promote products derived from this software without * specific prior written permission. * * ALTERNATIVELY, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2, as published by the Free * Software Foundation. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef __DRIVERS_USB_DWC3_GADGET_H #define __DRIVERS_USB_DWC3_GADGET_H #include #include #include "io.h" struct dwc3; #define to_dwc3_ep(ep) (container_of(ep, struct dwc3_ep, endpoint)) #define gadget_to_dwc(g) (container_of(g, struct dwc3, gadget)) /** * struct dwc3_gadget_ep_depcfg_param1 - DEPCMDPAR0 for DEPCFG command * @interrupt_number: self-explanatory * @reserved7_5: set to zero * @xfer_complete_enable: event generated when transfer completed * @xfer_in_progress_enable: event generated when transfer in progress * @xfer_not_ready_enable: event generated when transfer not read * @fifo_error_enable: generates events when FIFO Underrun (IN eps) * or FIFO Overrun (OUT) eps * @reserved_12: set to zero * @stream_event_enable: event generated on stream * @reserved14_15: set to zero * @binterval_m1: bInterval minus 1 * @stream_capable: this EP is capable of handling streams * @ep_number: self-explanatory * @bulk_based: Set to ‘1’ if this isochronous endpoint represents a bulk * data stream that ignores the relationship of bus time to the * intervals programmed in TRBs. * @fifo_based: Set to ‘1’ if this isochronous endpoint represents a * FIFO-based data stream where TRBs have fixed values and are never * written back by the core. */ struct dwc3_gadget_ep_depcfg_param1 { u32 interrupt_number:5; u32 reserved7_5:3; /* set to zero */ u32 xfer_complete_enable:1; u32 xfer_in_progress_enable:1; u32 xfer_not_ready_enable:1; u32 fifo_error_enable:1; /* IN-underrun, OUT-overrun */ u32 reserved12:1; /* set to zero */ u32 stream_event_enable:1; u32 reserved14_15:2; u32 binterval_m1:8; /* bInterval minus 1 */ u32 stream_capable:1; u32 ep_number:5; u32 bulk_based:1; u32 fifo_based:1; } __packed; /** * struct dwc3_gadget_ep_depcfg_param0 - Parameter 0 for DEPCFG * @reserved0: set to zero * @ep_type: Endpoint Type (control, bulk, iso, interrupt) * @max_packet_size: max packet size in bytes * @reserved16_14: set to zero * @fifo_number: self-explanatory * @burst_size: burst size minus 1 * @data_sequence_number: Must be 0 when an endpoint is initially configured * May be non-zero when an endpoint is configured after a power transition * that requires a save/restore. * @ignore_sequence_number: Set to ‘1’ to avoid resetting the sequence * number. This setting is used by software to modify the DEPEVTEN * event enable bits without modifying other endpoint settings. */ struct dwc3_gadget_ep_depcfg_param0 { u32 reserved0:1; u32 ep_type:2; u32 max_packet_size:11; u32 reserved16_14:3; u32 fifo_number:5; u32 burst_size:4; u32 data_sequence_number:5; u32 ignore_sequence_number:1; } __packed; /** * struct dwc3_gadget_ep_depxfercfg_param0 - Parameter 0 of DEPXFERCFG * @number_xfer_resources: Defines the number of Transfer Resources allocated * to this endpoint. This field must be set to 1. * @reserved16_31: set to zero; */ struct dwc3_gadget_ep_depxfercfg_param0 { u32 number_xfer_resources:16; u32 reserved16_31:16; } __packed; /** * struct dwc3_gadget_ep_depstrtxfer_param1 - Parameter 1 of DEPSTRTXFER * @transfer_desc_addr_low: Indicates the lower 32 bits of the external * memory's start address for the transfer descriptor. Because TRBs * must be aligned to a 16-byte boundary, the lower 4 bits of this * address must be 0. */ struct dwc3_gadget_ep_depstrtxfer_param1 { u32 transfer_desc_addr_low; } __packed; /** * struct dwc3_gadget_ep_depstrtxfer_param1 - Parameter 1 of DEPSTRTXFER * @transfer_desc_addr_high: Indicates the higher 32 bits of the external * memory’s start address for the transfer descriptor. */ struct dwc3_gadget_ep_depstrtxfer_param0 { u32 transfer_desc_addr_high; } __packed; struct dwc3_gadget_ep_cmd_params { union { u32 raw; } param2; union { u32 raw; struct dwc3_gadget_ep_depcfg_param1 depcfg; struct dwc3_gadget_ep_depstrtxfer_param1 depstrtxfer; } param1; union { u32 raw; struct dwc3_gadget_ep_depcfg_param0 depcfg; struct dwc3_gadget_ep_depxfercfg_param0 depxfercfg; struct dwc3_gadget_ep_depstrtxfer_param0 depstrtxfer; } param0; } __packed; /* -------------------------------------------------------------------------- */ struct dwc3_request { struct usb_request request; struct list_head list; struct dwc3_ep *dep; u8 epnum; struct dwc3_trb_hw *trb; dma_addr_t trb_dma; unsigned direction:1; unsigned mapped:1; unsigned queued:1; }; #define to_dwc3_request(r) (container_of(r, struct dwc3_request, request)) static inline struct dwc3_request *next_request(struct list_head *list) { if (list_empty(list)) return NULL; return list_first_entry(list, struct dwc3_request, list); } static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req) { struct dwc3_ep *dep = req->dep; req->queued = true; list_move_tail(&req->list, &dep->req_queued); } #if defined(CONFIG_USB_GADGET_DWC3) || defined(CONFIG_USB_GADGET_DWC3_MODULE) int dwc3_gadget_init(struct dwc3 *dwc); void dwc3_gadget_exit(struct dwc3 *dwc); #else static inline int dwc3_gadget_init(struct dwc3 *dwc) { return 0; } static inline void dwc3_gadget_exit(struct dwc3 *dwc) { } static inline int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, unsigned cmd, struct dwc3_gadget_ep_cmd_params *params) { return 0; } #endif void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, int status); void dwc3_ep0_interrupt(struct dwc3 *dwc, const struct dwc3_event_depevt *event); void dwc3_ep0_out_start(struct dwc3 *dwc); int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, gfp_t gfp_flags); int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value); int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, unsigned cmd, struct dwc3_gadget_ep_cmd_params *params); void dwc3_map_buffer_to_dma(struct dwc3_request *req); void dwc3_unmap_buffer_from_dma(struct dwc3_request *req); /** * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW * @dwc: DesignWare USB3 Pointer * @number: DWC endpoint number * * Caller should take care of locking */ static inline u32 dwc3_gadget_ep_get_transfer_index(struct dwc3 *dwc, u8 number) { u32 res_id; res_id = dwc3_readl(dwc->regs, DWC3_DEPCMD(number)); return DWC3_DEPCMD_GET_RSC_IDX(res_id); } /** * dwc3_gadget_event_string - returns event name * @event: the event code */ static inline const char *dwc3_gadget_event_string(u8 event) { switch (event) { case DWC3_DEVICE_EVENT_DISCONNECT: return "Disconnect"; case DWC3_DEVICE_EVENT_RESET: return "Reset"; case DWC3_DEVICE_EVENT_CONNECT_DONE: return "Connection Done"; case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: return "Link Status Change"; case DWC3_DEVICE_EVENT_WAKEUP: return "WakeUp"; case DWC3_DEVICE_EVENT_EOPF: return "End-Of-Frame"; case DWC3_DEVICE_EVENT_SOF: return "Start-Of-Frame"; case DWC3_DEVICE_EVENT_ERRATIC_ERROR: return "Erratic Error"; case DWC3_DEVICE_EVENT_CMD_CMPL: return "Command Complete"; case DWC3_DEVICE_EVENT_OVERFLOW: return "Overflow"; } return "UNKNOWN"; } /** * dwc3_ep_event_string - returns event name * @event: then event code */ static inline const char *dwc3_ep_event_string(u8 event) { switch (event) { case DWC3_DEPEVT_XFERCOMPLETE: return "Transfer Complete"; case DWC3_DEPEVT_XFERINPROGRESS: return "Transfer In-Progress"; case DWC3_DEPEVT_XFERNOTREADY: return "Transfer Not Ready"; case DWC3_DEPEVT_RXTXFIFOEVT: return "FIFO"; case DWC3_DEPEVT_STREAMEVT: return "Stream"; case DWC3_DEPEVT_EPCMDCMPLT: return "Endpoint Command Complete"; } return "UNKNOWN"; } #endif /* __DRIVERS_USB_DWC3_GADGET_H */