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Diffstat (limited to 'drivers/usb/dwc2/hcd.h')
| -rw-r--r-- | drivers/usb/dwc2/hcd.h | 787 |
1 files changed, 787 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd.h b/drivers/usb/dwc2/hcd.h new file mode 100644 index 000000000..b7254d94f --- /dev/null +++ b/drivers/usb/dwc2/hcd.h @@ -0,0 +1,787 @@ +/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ +/* + * hcd.h - DesignWare HS OTG Controller host-mode declarations + * + * Copyright (C) 2004-2013 Synopsys, Inc. + */ + +#ifndef __DWC2_HCD_H__ +#define __DWC2_HCD_H__ + +/* + * This file contains the structures, constants, and interfaces for the + * Host Contoller Driver (HCD) + * + * The Host Controller Driver (HCD) is responsible for translating requests + * from the USB Driver into the appropriate actions on the DWC_otg controller. + * It isolates the USBD from the specifics of the controller by providing an + * API to the USBD. + */ + +struct dwc2_qh; + +/** + * struct dwc2_host_chan - Software host channel descriptor + * + * @hc_num: Host channel number, used for register address lookup + * @dev_addr: Address of the device + * @ep_num: Endpoint of the device + * @ep_is_in: Endpoint direction + * @speed: Device speed. One of the following values: + * - USB_SPEED_LOW + * - USB_SPEED_FULL + * - USB_SPEED_HIGH + * @ep_type: Endpoint type. One of the following values: + * - USB_ENDPOINT_XFER_CONTROL: 0 + * - USB_ENDPOINT_XFER_ISOC: 1 + * - USB_ENDPOINT_XFER_BULK: 2 + * - USB_ENDPOINT_XFER_INTR: 3 + * @max_packet: Max packet size in bytes + * @data_pid_start: PID for initial transaction. + * 0: DATA0 + * 1: DATA2 + * 2: DATA1 + * 3: MDATA (non-Control EP), + * SETUP (Control EP) + * @multi_count: Number of additional periodic transactions per + * (micro)frame + * @xfer_buf: Pointer to current transfer buffer position + * @xfer_dma: DMA address of xfer_buf + * @align_buf: In Buffer DMA mode this will be used if xfer_buf is not + * DWORD aligned + * @xfer_len: Total number of bytes to transfer + * @xfer_count: Number of bytes transferred so far + * @start_pkt_count: Packet count at start of transfer + * @xfer_started: True if the transfer has been started + * @do_ping: True if a PING request should be issued on this channel + * @error_state: True if the error count for this transaction is non-zero + * @halt_on_queue: True if this channel should be halted the next time a + * request is queued for the channel. This is necessary in + * slave mode if no request queue space is available when + * an attempt is made to halt the channel. + * @halt_pending: True if the host channel has been halted, but the core + * is not finished flushing queued requests + * @do_split: Enable split for the channel + * @complete_split: Enable complete split + * @hub_addr: Address of high speed hub for the split + * @hub_port: Port of the low/full speed device for the split + * @xact_pos: Split transaction position. One of the following values: + * - DWC2_HCSPLT_XACTPOS_MID + * - DWC2_HCSPLT_XACTPOS_BEGIN + * - DWC2_HCSPLT_XACTPOS_END + * - DWC2_HCSPLT_XACTPOS_ALL + * @requests: Number of requests issued for this channel since it was + * assigned to the current transfer (not counting PINGs) + * @schinfo: Scheduling micro-frame bitmap + * @ntd: Number of transfer descriptors for the transfer + * @halt_status: Reason for halting the host channel + * @hcint: Contents of the HCINT register when the interrupt came + * @qh: QH for the transfer being processed by this channel + * @hc_list_entry: For linking to list of host channels + * @desc_list_addr: Current QH's descriptor list DMA address + * @desc_list_sz: Current QH's descriptor list size + * @split_order_list_entry: List entry for keeping track of the order of splits + * + * This structure represents the state of a single host channel when acting in + * host mode. It contains the data items needed to transfer packets to an + * endpoint via a host channel. + */ +struct dwc2_host_chan { + u8 hc_num; + + unsigned dev_addr:7; + unsigned ep_num:4; + unsigned ep_is_in:1; + unsigned speed:4; + unsigned ep_type:2; + unsigned max_packet:11; + unsigned data_pid_start:2; +#define DWC2_HC_PID_DATA0 TSIZ_SC_MC_PID_DATA0 +#define DWC2_HC_PID_DATA2 TSIZ_SC_MC_PID_DATA2 +#define DWC2_HC_PID_DATA1 TSIZ_SC_MC_PID_DATA1 +#define DWC2_HC_PID_MDATA TSIZ_SC_MC_PID_MDATA +#define DWC2_HC_PID_SETUP TSIZ_SC_MC_PID_SETUP + + unsigned multi_count:2; + + u8 *xfer_buf; + dma_addr_t xfer_dma; + dma_addr_t align_buf; + u32 xfer_len; + u32 xfer_count; + u16 start_pkt_count; + u8 xfer_started; + u8 do_ping; + u8 error_state; + u8 halt_on_queue; + u8 halt_pending; + u8 do_split; + u8 complete_split; + u8 hub_addr; + u8 hub_port; + u8 xact_pos; +#define DWC2_HCSPLT_XACTPOS_MID HCSPLT_XACTPOS_MID +#define DWC2_HCSPLT_XACTPOS_END HCSPLT_XACTPOS_END +#define DWC2_HCSPLT_XACTPOS_BEGIN HCSPLT_XACTPOS_BEGIN +#define DWC2_HCSPLT_XACTPOS_ALL HCSPLT_XACTPOS_ALL + + u8 requests; + u8 schinfo; + u16 ntd; + enum dwc2_halt_status halt_status; + u32 hcint; + struct dwc2_qh *qh; + struct list_head hc_list_entry; + dma_addr_t desc_list_addr; + u32 desc_list_sz; + struct list_head split_order_list_entry; +}; + +struct dwc2_hcd_pipe_info { + u8 dev_addr; + u8 ep_num; + u8 pipe_type; + u8 pipe_dir; + u16 maxp; + u16 maxp_mult; +}; + +struct dwc2_hcd_iso_packet_desc { + u32 offset; + u32 length; + u32 actual_length; + u32 status; +}; + +struct dwc2_qtd; + +struct dwc2_hcd_urb { + void *priv; + struct dwc2_qtd *qtd; + void *buf; + dma_addr_t dma; + void *setup_packet; + dma_addr_t setup_dma; + u32 length; + u32 actual_length; + u32 status; + u32 error_count; + u32 packet_count; + u32 flags; + u16 interval; + struct dwc2_hcd_pipe_info pipe_info; + struct dwc2_hcd_iso_packet_desc iso_descs[]; +}; + +/* Phases for control transfers */ +enum dwc2_control_phase { + DWC2_CONTROL_SETUP, + DWC2_CONTROL_DATA, + DWC2_CONTROL_STATUS, +}; + +/* Transaction types */ +enum dwc2_transaction_type { + DWC2_TRANSACTION_NONE, + DWC2_TRANSACTION_PERIODIC, + DWC2_TRANSACTION_NON_PERIODIC, + DWC2_TRANSACTION_ALL, +}; + +/* The number of elements per LS bitmap (per port on multi_tt) */ +#define DWC2_ELEMENTS_PER_LS_BITMAP DIV_ROUND_UP(DWC2_LS_SCHEDULE_SLICES, \ + BITS_PER_LONG) + +/** + * struct dwc2_tt - dwc2 data associated with a usb_tt + * + * @refcount: Number of Queue Heads (QHs) holding a reference. + * @usb_tt: Pointer back to the official usb_tt. + * @periodic_bitmaps: Bitmap for which parts of the 1ms frame are accounted + * for already. Each is DWC2_ELEMENTS_PER_LS_BITMAP + * elements (so sizeof(long) times that in bytes). + * + * This structure is stored in the hcpriv of the official usb_tt. + */ +struct dwc2_tt { + int refcount; + struct usb_tt *usb_tt; + unsigned long periodic_bitmaps[]; +}; + +/** + * struct dwc2_hs_transfer_time - Info about a transfer on the high speed bus. + * + * @start_schedule_us: The start time on the main bus schedule. Note that + * the main bus schedule is tightly packed and this + * time should be interpreted as tightly packed (so + * uFrame 0 starts at 0 us, uFrame 1 starts at 100 us + * instead of 125 us). + * @duration_us: How long this transfer goes. + */ + +struct dwc2_hs_transfer_time { + u32 start_schedule_us; + u16 duration_us; +}; + +/** + * struct dwc2_qh - Software queue head structure + * + * @hsotg: The HCD state structure for the DWC OTG controller + * @ep_type: Endpoint type. One of the following values: + * - USB_ENDPOINT_XFER_CONTROL + * - USB_ENDPOINT_XFER_BULK + * - USB_ENDPOINT_XFER_INT + * - USB_ENDPOINT_XFER_ISOC + * @ep_is_in: Endpoint direction + * @maxp: Value from wMaxPacketSize field of Endpoint Descriptor + * @maxp_mult: Multiplier for maxp + * @dev_speed: Device speed. One of the following values: + * - USB_SPEED_LOW + * - USB_SPEED_FULL + * - USB_SPEED_HIGH + * @data_toggle: Determines the PID of the next data packet for + * non-controltransfers. Ignored for control transfers. + * One of the following values: + * - DWC2_HC_PID_DATA0 + * - DWC2_HC_PID_DATA1 + * @ping_state: Ping state + * @do_split: Full/low speed endpoint on high-speed hub requires split + * @td_first: Index of first activated isochronous transfer descriptor + * @td_last: Index of last activated isochronous transfer descriptor + * @host_us: Bandwidth in microseconds per transfer as seen by host + * @device_us: Bandwidth in microseconds per transfer as seen by device + * @host_interval: Interval between transfers as seen by the host. If + * the host is high speed and the device is low speed this + * will be 8 times device interval. + * @device_interval: Interval between transfers as seen by the device. + * interval. + * @next_active_frame: (Micro)frame _before_ we next need to put something on + * the bus. We'll move the qh to active here. If the + * host is in high speed mode this will be a uframe. If + * the host is in low speed mode this will be a full frame. + * @start_active_frame: If we are partway through a split transfer, this will be + * what next_active_frame was when we started. Otherwise + * it should always be the same as next_active_frame. + * @num_hs_transfers: Number of transfers in hs_transfers. + * Normally this is 1 but can be more than one for splits. + * Always >= 1 unless the host is in low/full speed mode. + * @hs_transfers: Transfers that are scheduled as seen by the high speed + * bus. Not used if host is in low or full speed mode (but + * note that it IS USED if the device is low or full speed + * as long as the HOST is in high speed mode). + * @ls_start_schedule_slice: Start time (in slices) on the low speed bus + * schedule that's being used by this device. This + * will be on the periodic_bitmap in a + * "struct dwc2_tt". Not used if this device is high + * speed. Note that this is in "schedule slice" which + * is tightly packed. + * @ntd: Actual number of transfer descriptors in a list + * @dw_align_buf: Used instead of original buffer if its physical address + * is not dword-aligned + * @dw_align_buf_dma: DMA address for dw_align_buf + * @qtd_list: List of QTDs for this QH + * @channel: Host channel currently processing transfers for this QH + * @qh_list_entry: Entry for QH in either the periodic or non-periodic + * schedule + * @desc_list: List of transfer descriptors + * @desc_list_dma: Physical address of desc_list + * @desc_list_sz: Size of descriptors list + * @n_bytes: Xfer Bytes array. Each element corresponds to a transfer + * descriptor and indicates original XferSize value for the + * descriptor + * @unreserve_timer: Timer for releasing periodic reservation. + * @wait_timer: Timer used to wait before re-queuing. + * @dwc_tt: Pointer to our tt info (or NULL if no tt). + * @ttport: Port number within our tt. + * @tt_buffer_dirty True if clear_tt_buffer_complete is pending + * @unreserve_pending: True if we planned to unreserve but haven't yet. + * @schedule_low_speed: True if we have a low/full speed component (either the + * host is in low/full speed mode or do_split). + * @want_wait: We should wait before re-queuing; only matters for non- + * periodic transfers and is ignored for periodic ones. + * @wait_timer_cancel: Set to true to cancel the wait_timer. + * + * @tt_buffer_dirty: True if EP's TT buffer is not clean. + * A Queue Head (QH) holds the static characteristics of an endpoint and + * maintains a list of transfers (QTDs) for that endpoint. A QH structure may + * be entered in either the non-periodic or periodic schedule. + */ +struct dwc2_qh { + struct dwc2_hsotg *hsotg; + u8 ep_type; + u8 ep_is_in; + u16 maxp; + u16 maxp_mult; + u8 dev_speed; + u8 data_toggle; + u8 ping_state; + u8 do_split; + u8 td_first; + u8 td_last; + u16 host_us; + u16 device_us; + u16 host_interval; + u16 device_interval; + u16 next_active_frame; + u16 start_active_frame; + s16 num_hs_transfers; + struct dwc2_hs_transfer_time hs_transfers[DWC2_HS_SCHEDULE_UFRAMES]; + u32 ls_start_schedule_slice; + u16 ntd; + u8 *dw_align_buf; + dma_addr_t dw_align_buf_dma; + struct list_head qtd_list; + struct dwc2_host_chan *channel; + struct list_head qh_list_entry; + struct dwc2_dma_desc *desc_list; + dma_addr_t desc_list_dma; + u32 desc_list_sz; + u32 *n_bytes; + struct timer_list unreserve_timer; + struct hrtimer wait_timer; + struct dwc2_tt *dwc_tt; + int ttport; + unsigned tt_buffer_dirty:1; + unsigned unreserve_pending:1; + unsigned schedule_low_speed:1; + unsigned want_wait:1; + unsigned wait_timer_cancel:1; +}; + +/** + * struct dwc2_qtd - Software queue transfer descriptor (QTD) + * + * @control_phase: Current phase for control transfers (Setup, Data, or + * Status) + * @in_process: Indicates if this QTD is currently processed by HW + * @data_toggle: Determines the PID of the next data packet for the + * data phase of control transfers. Ignored for other + * transfer types. One of the following values: + * - DWC2_HC_PID_DATA0 + * - DWC2_HC_PID_DATA1 + * @complete_split: Keeps track of the current split type for FS/LS + * endpoints on a HS Hub + * @isoc_split_pos: Position of the ISOC split in full/low speed + * @isoc_frame_index: Index of the next frame descriptor for an isochronous + * transfer. A frame descriptor describes the buffer + * position and length of the data to be transferred in the + * next scheduled (micro)frame of an isochronous transfer. + * It also holds status for that transaction. The frame + * index starts at 0. + * @isoc_split_offset: Position of the ISOC split in the buffer for the + * current frame + * @ssplit_out_xfer_count: How many bytes transferred during SSPLIT OUT + * @error_count: Holds the number of bus errors that have occurred for + * a transaction within this transfer + * @n_desc: Number of DMA descriptors for this QTD + * @isoc_frame_index_last: Last activated frame (packet) index, used in + * descriptor DMA mode only + * @num_naks: Number of NAKs received on this QTD. + * @urb: URB for this transfer + * @qh: Queue head for this QTD + * @qtd_list_entry: For linking to the QH's list of QTDs + * @isoc_td_first: Index of first activated isochronous transfer + * descriptor in Descriptor DMA mode + * @isoc_td_last: Index of last activated isochronous transfer + * descriptor in Descriptor DMA mode + * + * A Queue Transfer Descriptor (QTD) holds the state of a bulk, control, + * interrupt, or isochronous transfer. A single QTD is created for each URB + * (of one of these types) submitted to the HCD. The transfer associated with + * a QTD may require one or multiple transactions. + * + * A QTD is linked to a Queue Head, which is entered in either the + * non-periodic or periodic schedule for execution. When a QTD is chosen for + * execution, some or all of its transactions may be executed. After + * execution, the state of the QTD is updated. The QTD may be retired if all + * its transactions are complete or if an error occurred. Otherwise, it + * remains in the schedule so more transactions can be executed later. + */ +struct dwc2_qtd { + enum dwc2_control_phase control_phase; + u8 in_process; + u8 data_toggle; + u8 complete_split; + u8 isoc_split_pos; + u16 isoc_frame_index; + u16 isoc_split_offset; + u16 isoc_td_last; + u16 isoc_td_first; + u32 ssplit_out_xfer_count; + u8 error_count; + u8 n_desc; + u16 isoc_frame_index_last; + u16 num_naks; + struct dwc2_hcd_urb *urb; + struct dwc2_qh *qh; + struct list_head qtd_list_entry; +}; + +#ifdef DEBUG +struct hc_xfer_info { + struct dwc2_hsotg *hsotg; + struct dwc2_host_chan *chan; +}; +#endif + +u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg); + +/* Gets the struct usb_hcd that contains a struct dwc2_hsotg */ +static inline struct usb_hcd *dwc2_hsotg_to_hcd(struct dwc2_hsotg *hsotg) +{ + return (struct usb_hcd *)hsotg->priv; +} + +/* + * Inline used to disable one channel interrupt. Channel interrupts are + * disabled when the channel is halted or released by the interrupt handler. + * There is no need to handle further interrupts of that type until the + * channel is re-assigned. In fact, subsequent handling may cause crashes + * because the channel structures are cleaned up when the channel is released. + */ +static inline void disable_hc_int(struct dwc2_hsotg *hsotg, int chnum, u32 intr) +{ + u32 mask = dwc2_readl(hsotg, HCINTMSK(chnum)); + + mask &= ~intr; + dwc2_writel(hsotg, mask, HCINTMSK(chnum)); +} + +void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan); +void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, + enum dwc2_halt_status halt_status); +void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg, + struct dwc2_host_chan *chan); + +/* + * Reads HPRT0 in preparation to modify. It keeps the WC bits 0 so that if they + * are read as 1, they won't clear when written back. + */ +static inline u32 dwc2_read_hprt0(struct dwc2_hsotg *hsotg) +{ + u32 hprt0 = dwc2_readl(hsotg, HPRT0); + + hprt0 &= ~(HPRT0_ENA | HPRT0_CONNDET | HPRT0_ENACHG | HPRT0_OVRCURRCHG); + return hprt0; +} + +static inline u8 dwc2_hcd_get_ep_num(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->ep_num; +} + +static inline u8 dwc2_hcd_get_pipe_type(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->pipe_type; +} + +static inline u16 dwc2_hcd_get_maxp(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->maxp; +} + +static inline u16 dwc2_hcd_get_maxp_mult(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->maxp_mult; +} + +static inline u8 dwc2_hcd_get_dev_addr(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->dev_addr; +} + +static inline u8 dwc2_hcd_is_pipe_isoc(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->pipe_type == USB_ENDPOINT_XFER_ISOC; +} + +static inline u8 dwc2_hcd_is_pipe_int(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->pipe_type == USB_ENDPOINT_XFER_INT; +} + +static inline u8 dwc2_hcd_is_pipe_bulk(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->pipe_type == USB_ENDPOINT_XFER_BULK; +} + +static inline u8 dwc2_hcd_is_pipe_control(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->pipe_type == USB_ENDPOINT_XFER_CONTROL; +} + +static inline u8 dwc2_hcd_is_pipe_in(struct dwc2_hcd_pipe_info *pipe) +{ + return pipe->pipe_dir == USB_DIR_IN; +} + +static inline u8 dwc2_hcd_is_pipe_out(struct dwc2_hcd_pipe_info *pipe) +{ + return !dwc2_hcd_is_pipe_in(pipe); +} + +int dwc2_hcd_init(struct dwc2_hsotg *hsotg); +void dwc2_hcd_remove(struct dwc2_hsotg *hsotg); + +/* Transaction Execution Functions */ +enum dwc2_transaction_type dwc2_hcd_select_transactions( + struct dwc2_hsotg *hsotg); +void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg, + enum dwc2_transaction_type tr_type); + +/* Schedule Queue Functions */ +/* Implemented in hcd_queue.c */ +struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg, + struct dwc2_hcd_urb *urb, + gfp_t mem_flags); +void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); +int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); +void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); +void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, + int sched_csplit); + +void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb); +int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd, + struct dwc2_qh *qh); + +/* Unlinks and frees a QTD */ +static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg, + struct dwc2_qtd *qtd, + struct dwc2_qh *qh) +{ + list_del(&qtd->qtd_list_entry); + kfree(qtd); +} + +/* Descriptor DMA support functions */ +void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg, + struct dwc2_qh *qh); +void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg, + struct dwc2_host_chan *chan, int chnum, + enum dwc2_halt_status halt_status); + +int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, + gfp_t mem_flags); +void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); + +/* Check if QH is non-periodic */ +#define dwc2_qh_is_non_per(_qh_ptr_) \ + ((_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_BULK || \ + (_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_CONTROL) + +#ifdef CONFIG_USB_DWC2_DEBUG_PERIODIC +static inline bool dbg_hc(struct dwc2_host_chan *hc) { return true; } +static inline bool dbg_qh(struct dwc2_qh *qh) { return true; } +static inline bool dbg_urb(struct urb *urb) { return true; } +static inline bool dbg_perio(void) { return true; } +#else /* !CONFIG_USB_DWC2_DEBUG_PERIODIC */ +static inline bool dbg_hc(struct dwc2_host_chan *hc) +{ + return hc->ep_type == USB_ENDPOINT_XFER_BULK || + hc->ep_type == USB_ENDPOINT_XFER_CONTROL; +} + +static inline bool dbg_qh(struct dwc2_qh *qh) +{ + return qh->ep_type == USB_ENDPOINT_XFER_BULK || + qh->ep_type == USB_ENDPOINT_XFER_CONTROL; +} + +static inline bool dbg_urb(struct urb *urb) +{ + return usb_pipetype(urb->pipe) == PIPE_BULK || + usb_pipetype(urb->pipe) == PIPE_CONTROL; +} + +static inline bool dbg_perio(void) { return false; } +#endif + +/* + * Returns true if frame1 index is greater than frame2 index. The comparison + * is done modulo FRLISTEN_64_SIZE. This accounts for the rollover of the + * frame number when the max index frame number is reached. + */ +static inline bool dwc2_frame_idx_num_gt(u16 fr_idx1, u16 fr_idx2) +{ + u16 diff = fr_idx1 - fr_idx2; + u16 sign = diff & (FRLISTEN_64_SIZE >> 1); + + return diff && !sign; +} + +/* + * Returns true if frame1 is less than or equal to frame2. The comparison is + * done modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the + * frame number when the max frame number is reached. + */ +static inline int dwc2_frame_num_le(u16 frame1, u16 frame2) +{ + return ((frame2 - frame1) & HFNUM_MAX_FRNUM) <= (HFNUM_MAX_FRNUM >> 1); +} + +/* + * Returns true if frame1 is greater than frame2. The comparison is done + * modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the frame + * number when the max frame number is reached. + */ +static inline int dwc2_frame_num_gt(u16 frame1, u16 frame2) +{ + return (frame1 != frame2) && + ((frame1 - frame2) & HFNUM_MAX_FRNUM) < (HFNUM_MAX_FRNUM >> 1); +} + +/* + * Increments frame by the amount specified by inc. The addition is done + * modulo HFNUM_MAX_FRNUM. Returns the incremented value. + */ +static inline u16 dwc2_frame_num_inc(u16 frame, u16 inc) +{ + return (frame + inc) & HFNUM_MAX_FRNUM; +} + +static inline u16 dwc2_frame_num_dec(u16 frame, u16 dec) +{ + return (frame + HFNUM_MAX_FRNUM + 1 - dec) & HFNUM_MAX_FRNUM; +} + +static inline u16 dwc2_full_frame_num(u16 frame) +{ + return (frame & HFNUM_MAX_FRNUM) >> 3; +} + +static inline u16 dwc2_micro_frame_num(u16 frame) +{ + return frame & 0x7; +} + +/* + * Returns the Core Interrupt Status register contents, ANDed with the Core + * Interrupt Mask register contents + */ +static inline u32 dwc2_read_core_intr(struct dwc2_hsotg *hsotg) +{ + return dwc2_readl(hsotg, GINTSTS) & + dwc2_readl(hsotg, GINTMSK); +} + +static inline u32 dwc2_hcd_urb_get_status(struct dwc2_hcd_urb *dwc2_urb) +{ + return dwc2_urb->status; +} + +static inline u32 dwc2_hcd_urb_get_actual_length( + struct dwc2_hcd_urb *dwc2_urb) +{ + return dwc2_urb->actual_length; +} + +static inline u32 dwc2_hcd_urb_get_error_count(struct dwc2_hcd_urb *dwc2_urb) +{ + return dwc2_urb->error_count; +} + +static inline void dwc2_hcd_urb_set_iso_desc_params( + struct dwc2_hcd_urb *dwc2_urb, int desc_num, u32 offset, + u32 length) +{ + dwc2_urb->iso_descs[desc_num].offset = offset; + dwc2_urb->iso_descs[desc_num].length = length; +} + +static inline u32 dwc2_hcd_urb_get_iso_desc_status( + struct dwc2_hcd_urb *dwc2_urb, int desc_num) +{ + return dwc2_urb->iso_descs[desc_num].status; +} + +static inline u32 dwc2_hcd_urb_get_iso_desc_actual_length( + struct dwc2_hcd_urb *dwc2_urb, int desc_num) +{ + return dwc2_urb->iso_descs[desc_num].actual_length; +} + +static inline int dwc2_hcd_is_bandwidth_allocated(struct dwc2_hsotg *hsotg, + struct usb_host_endpoint *ep) +{ + struct dwc2_qh *qh = ep->hcpriv; + + if (qh && !list_empty(&qh->qh_list_entry)) + return 1; + + return 0; +} + +static inline u16 dwc2_hcd_get_ep_bandwidth(struct dwc2_hsotg *hsotg, + struct usb_host_endpoint *ep) +{ + struct dwc2_qh *qh = ep->hcpriv; + + if (!qh) { + WARN_ON(1); + return 0; + } + + return qh->host_us; +} + +void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg, + struct dwc2_host_chan *chan, int chnum, + struct dwc2_qtd *qtd); + +/* HCD Core API */ + +/** + * dwc2_handle_hcd_intr() - Called on every hardware interrupt + * + * @hsotg: The DWC2 HCD + * + * Returns IRQ_HANDLED if interrupt is handled + * Return IRQ_NONE if interrupt is not handled + */ +irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg); + +/** + * dwc2_hcd_stop() - Halts the DWC_otg host mode operation + * + * @hsotg: The DWC2 HCD + */ +void dwc2_hcd_stop(struct dwc2_hsotg *hsotg); + +/** + * dwc2_hcd_is_b_host() - Returns 1 if core currently is acting as B host, + * and 0 otherwise + * + * @hsotg: The DWC2 HCD + */ +int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg); + +/** + * dwc2_hcd_dump_state() - Dumps hsotg state + * + * @hsotg: The DWC2 HCD + * + * NOTE: This function will be removed once the peripheral controller code + * is integrated and the driver is stable + */ +void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg); + +/* URB interface */ + +/* Transfer flags */ +#define URB_GIVEBACK_ASAP 0x1 +#define URB_SEND_ZERO_PACKET 0x2 + +/* Host driver callbacks */ +struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg, + void *context, gfp_t mem_flags, + int *ttport); + +void dwc2_host_put_tt_info(struct dwc2_hsotg *hsotg, + struct dwc2_tt *dwc_tt); +int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context); +void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd, + int status); + +#endif /* __DWC2_HCD_H__ */ |