| // 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. |
| * |
| * 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") as published by the Free Software |
| * Foundation; either version 2 of the License, or (at your option) any |
| * later version. |
| * |
| * 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 __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[0]; |
| }; |
| |
| /* 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__ */ |
