diff options
Diffstat (limited to 'drivers/usb/gadget/dwc_otg/dwc_otg_hcd.h')
| -rw-r--r-- | drivers/usb/gadget/dwc_otg/dwc_otg_hcd.h | 660 |
1 files changed, 660 insertions, 0 deletions
diff --git a/drivers/usb/gadget/dwc_otg/dwc_otg_hcd.h b/drivers/usb/gadget/dwc_otg/dwc_otg_hcd.h new file mode 100644 index 00000000000..ae2b8c3e179 --- /dev/null +++ b/drivers/usb/gadget/dwc_otg/dwc_otg_hcd.h @@ -0,0 +1,660 @@ +/* ========================================================================== + * $File: //dwh/usb_iip/dev/software/otg_ipmate/linux/drivers/dwc_otg_hcd.h $ + * $Revision: #6 $ + * $Date: 2006/12/05 $ + * $Change: 762293 $ + * + * Synopsys HS OTG Linux Software Driver and documentation (hereinafter, + * "Software") is an Unsupported proprietary work of Synopsys, Inc. unless + * otherwise expressly agreed to in writing between Synopsys and you. + * + * The Software IS NOT an item of Licensed Software or Licensed Product under + * any End User Software License Agreement or Agreement for Licensed Product + * with Synopsys or any supplement thereto. You are permitted to use and + * redistribute this Software in source and binary forms, with or without + * modification, provided that redistributions of source code must retain this + * notice. You may not view, use, disclose, copy or distribute this file or + * any information contained herein except pursuant to this license grant from + * Synopsys. If you do not agree with this notice, including the disclaimer + * below, then you are not authorized to use the Software. + * + * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" BASIS + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 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 CONFIG_DWC_DEVICE_ONLY +#if !defined(__DWC_HCD_H__) +#define __DWC_HCD_H__ + +#include <linux/list.h> +#include <linux/usb.h> +#include <../drivers/usb/core/hcd.h> + +struct lm_device; +struct dwc_otg_device; + +#include "dwc_otg_cil.h" + +/** + * @file + * + * 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. + */ + +/** + * Phases for control transfers. + */ +typedef enum dwc_otg_control_phase { + DWC_OTG_CONTROL_SETUP, + DWC_OTG_CONTROL_DATA, + DWC_OTG_CONTROL_STATUS +} dwc_otg_control_phase_e; + +/** Transaction types. */ +typedef enum dwc_otg_transaction_type { + DWC_OTG_TRANSACTION_NONE, + DWC_OTG_TRANSACTION_PERIODIC, + DWC_OTG_TRANSACTION_NON_PERIODIC, + DWC_OTG_TRANSACTION_ALL +} dwc_otg_transaction_type_e; + +/** + * 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 dwc_otg_qh; + +typedef struct dwc_otg_qtd { + /** + * Determines the PID of the next data packet for the data phase of + * control transfers. Ignored for other transfer types.<br> + * One of the following values: + * - DWC_OTG_HC_PID_DATA0 + * - DWC_OTG_HC_PID_DATA1 + */ + uint8_t data_toggle; + + /** Current phase for control transfers (Setup, Data, or Status). */ + dwc_otg_control_phase_e control_phase; + + /** Keep track of the current split type + * for FS/LS endpoints on a HS Hub */ + uint8_t complete_split; + + /** How many bytes transferred during SSPLIT OUT */ + uint32_t ssplit_out_xfer_count; + + /** + * Holds the number of bus errors that have occurred for a transaction + * within this transfer. + */ + uint8_t error_count; + + /** + * 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. + */ + int isoc_frame_index; + + /** Position of the ISOC split on full/low speed */ + uint8_t isoc_split_pos; + + /** Position of the ISOC split in the buffer for the current frame */ + uint16_t isoc_split_offset; + + /** URB for this transfer */ + struct urb *urb; + + /** This list of QTDs */ + struct list_head qtd_list_entry; + + /* Field to track the qh pointer */ + struct dwc_otg_qh *qtd_qh_ptr; +} dwc_otg_qtd_t; + +/** + * 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. + */ +typedef struct dwc_otg_qh { + /** + * Endpoint type. + * One of the following values: + * - USB_ENDPOINT_XFER_CONTROL + * - USB_ENDPOINT_XFER_ISOC + * - USB_ENDPOINT_XFER_BULK + * - USB_ENDPOINT_XFER_INT + */ + uint8_t ep_type; + uint8_t ep_is_in; + + /** wMaxPacketSize Field of Endpoint Descriptor. */ + uint16_t maxp; + + /** + * Determines the PID of the next data packet for non-control + * transfers. Ignored for control transfers.<br> + * One of the following values: + * - DWC_OTG_HC_PID_DATA0 + * - DWC_OTG_HC_PID_DATA1 + */ + uint8_t data_toggle; + + /** Ping state if 1. */ + uint8_t ping_state; + + /** + * List of QTDs for this QH. + */ + struct list_head qtd_list; + + /** Host channel currently processing transfers for this QH. */ + dwc_hc_t *channel; + + /** QTD currently assigned to a host channel for this QH. */ + dwc_otg_qtd_t *qtd_in_process; + + /** Full/low speed endpoint on high-speed hub requires split. */ + uint8_t do_split; + + /** @name Periodic schedule information */ + /** @{ */ + + /** Bandwidth in microseconds per (micro)frame. */ + uint8_t usecs; + + /** Interval between transfers in (micro)frames. */ + uint16_t interval; + + /** + * (micro)frame to initialize a periodic transfer. The transfer + * executes in the following (micro)frame. + */ + uint16_t sched_frame; + + /** (micro)frame at which last start split was initialized. */ + uint16_t start_split_frame; + + /** @} */ + + /** Entry for QH in either the periodic or non-periodic schedule. */ + struct list_head qh_list_entry; +} dwc_otg_qh_t; + +/** + * This structure holds the state of the HCD, including the non-periodic and + * periodic schedules. + */ +typedef struct dwc_otg_hcd { + + spinlock_t lock; + + /** DWC OTG Core Interface Layer */ + dwc_otg_core_if_t *core_if; + + /** Internal DWC HCD Flags */ + volatile union dwc_otg_hcd_internal_flags { + uint32_t d32; + struct { + unsigned port_connect_status_change : 1; + unsigned port_connect_status : 1; + unsigned port_reset_change : 1; + unsigned port_enable_change : 1; + unsigned port_suspend_change : 1; + unsigned port_over_current_change : 1; + unsigned reserved : 27; + } b; + } flags; + + /** + * Inactive items in the non-periodic schedule. This is a list of + * Queue Heads. Transfers associated with these Queue Heads are not + * currently assigned to a host channel. + */ + struct list_head non_periodic_sched_inactive; + + /** + * Deferred items in the non-periodic schedule. This is a list of + * Queue Heads. Transfers associated with these Queue Heads are not + * currently assigned to a host channel. + * When we get an NAK, the QH goes here. + */ + struct list_head non_periodic_sched_deferred; + + /** + * Active items in the non-periodic schedule. This is a list of + * Queue Heads. Transfers associated with these Queue Heads are + * currently assigned to a host channel. + */ + struct list_head non_periodic_sched_active; + + /** + * Pointer to the next Queue Head to process in the active + * non-periodic schedule. + */ + struct list_head *non_periodic_qh_ptr; + + /** + * Inactive items 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. + */ + struct list_head periodic_sched_inactive; + + /** + * 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. + */ + struct list_head periodic_sched_ready; + + /** + * 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. + */ + struct list_head periodic_sched_assigned; + + /** + * 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. + */ + struct list_head periodic_sched_queued; + + /** + * 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. + */ + uint16_t periodic_usecs; + + /** + * Frame number read from the core at SOF. The value ranges from 0 to + * DWC_HFNUM_MAX_FRNUM. + */ + uint16_t frame_number; + + /** + * Free host channels in the controller. This is a list of + * dwc_hc_t items. + */ + struct list_head free_hc_list; + + /** + * 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 available for + * non-periodic transactions. + */ + int periodic_channels; + + /** + * Number of host channels assigned to non-periodic transfers. + */ + int non_periodic_channels; + + /** + * 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. + */ + dwc_hc_t *hc_ptr_array[MAX_EPS_CHANNELS]; + + /** + * Buffer to use for any data received during the status phase of a + * control transfer. Normally no data is transferred during the status + * phase. This buffer is used as a bit bucket. + */ + uint8_t *status_buf; + + /** + * DMA address for status_buf. + */ + dma_addr_t status_buf_dma; +#define DWC_OTG_HCD_STATUS_BUF_SIZE 64 + + /** + * Structure to allow starting the HCD in a non-interrupt context + * during an OTG role change. + */ + struct work_struct start_work; + struct usb_hcd *_p; + + /** + * Connection timer. An OTG host must display a message if the device + * does not connect. Started when the VBus power is turned on via + * sysfs attribute "buspower". + */ + struct timer_list conn_timer; + + /* Tasket to do a reset */ + struct tasklet_struct *reset_tasklet; + +#ifdef CONFIG_DWC_DEBUG + uint32_t frrem_samples; + uint64_t frrem_accum; + + uint32_t hfnum_7_samples_a; + uint64_t hfnum_7_frrem_accum_a; + uint32_t hfnum_0_samples_a; + uint64_t hfnum_0_frrem_accum_a; + uint32_t hfnum_other_samples_a; + uint64_t hfnum_other_frrem_accum_a; + + uint32_t hfnum_7_samples_b; + uint64_t hfnum_7_frrem_accum_b; + uint32_t hfnum_0_samples_b; + uint64_t hfnum_0_frrem_accum_b; + uint32_t hfnum_other_samples_b; + uint64_t hfnum_other_frrem_accum_b; +#endif + +} dwc_otg_hcd_t; + +/** Gets the dwc_otg_hcd from a struct usb_hcd */ +static inline dwc_otg_hcd_t *hcd_to_dwc_otg_hcd(struct usb_hcd *hcd) +{ + return (dwc_otg_hcd_t *)(hcd->hcd_priv); +} + +/** Gets the struct usb_hcd that contains a dwc_otg_hcd_t. */ +static inline struct usb_hcd *dwc_otg_hcd_to_hcd(dwc_otg_hcd_t *dwc_otg_hcd) +{ + return container_of((void *)dwc_otg_hcd, struct usb_hcd, hcd_priv); +} + +/** @name HCD Create/Destroy Functions */ +/** @{ */ +extern int __init dwc_otg_hcd_init(struct device *_dev, dwc_otg_device_t * dwc_otg_device); +extern void dwc_otg_hcd_remove(struct device *_dev); +/** @} */ + +/** @name Linux HC Driver API Functions */ +/** @{ */ + +extern int dwc_otg_hcd_start(struct usb_hcd *hcd); +extern void dwc_otg_hcd_stop(struct usb_hcd *hcd); +extern int dwc_otg_hcd_get_frame_number(struct usb_hcd *hcd); +extern void dwc_otg_hcd_free(struct usb_hcd *hcd); +extern int dwc_otg_hcd_urb_enqueue(struct usb_hcd *hcd, + struct urb *urb, + gfp_t mem_flags); +extern int dwc_otg_hcd_urb_dequeue(struct usb_hcd *hcd, +/* struct usb_host_endpoint *ep,*/ + struct urb *urb, int status); +extern void dwc_otg_hcd_endpoint_disable(struct usb_hcd *hcd, + struct usb_host_endpoint *ep); +extern irqreturn_t dwc_otg_hcd_irq(struct usb_hcd *hcd); +extern int dwc_otg_hcd_hub_status_data(struct usb_hcd *hcd, + char *buf); +extern int dwc_otg_hcd_hub_control(struct usb_hcd *hcd, + u16 typeReq, + u16 wValue, + u16 wIndex, + char *buf, + u16 wLength); + +/** @} */ + +/** @name Transaction Execution Functions */ +/** @{ */ +extern dwc_otg_transaction_type_e dwc_otg_hcd_select_transactions(dwc_otg_hcd_t *_hcd); +extern void dwc_otg_hcd_queue_transactions(dwc_otg_hcd_t *_hcd, + dwc_otg_transaction_type_e _tr_type); +extern void dwc_otg_hcd_complete_urb(dwc_otg_hcd_t *_hcd, struct urb *_urb, + int _status); +/** @} */ + +/** @name Interrupt Handler Functions */ +/** @{ */ +extern int32_t dwc_otg_hcd_handle_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_sof_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_rx_status_q_level_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_np_tx_fifo_empty_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_perio_tx_fifo_empty_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_incomplete_periodic_intr(dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_port_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_conn_id_status_change_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_disconnect_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_hc_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_hc_n_intr (dwc_otg_hcd_t *_dwc_otg_hcd, uint32_t _num); +extern int32_t dwc_otg_hcd_handle_session_req_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +extern int32_t dwc_otg_hcd_handle_wakeup_detected_intr (dwc_otg_hcd_t *_dwc_otg_hcd); +/** @} */ + + +/** @name Schedule Queue Functions */ +/** @{ */ + +/* Implemented in dwc_otg_hcd_queue.c */ +extern dwc_otg_qh_t *dwc_otg_hcd_qh_create (dwc_otg_hcd_t *_hcd, struct urb *_urb); +extern void dwc_otg_hcd_qh_init (dwc_otg_hcd_t *_hcd, dwc_otg_qh_t *_qh, struct urb *_urb); +extern void dwc_otg_hcd_qh_free (dwc_otg_qh_t *_qh); +extern int dwc_otg_hcd_qh_add (dwc_otg_hcd_t *_hcd, dwc_otg_qh_t *_qh); +extern void dwc_otg_hcd_qh_remove (dwc_otg_hcd_t *_hcd, dwc_otg_qh_t *_qh); +extern void dwc_otg_hcd_qh_deactivate (dwc_otg_hcd_t *_hcd, dwc_otg_qh_t *_qh, int sched_csplit); +extern int dwc_otg_hcd_qh_deferr (dwc_otg_hcd_t *_hcd, dwc_otg_qh_t *_qh, int delay); + +/** Remove and free a QH */ +static inline void dwc_otg_hcd_qh_remove_and_free (dwc_otg_hcd_t *_hcd, + dwc_otg_qh_t *_qh) +{ + dwc_otg_hcd_qh_remove (_hcd, _qh); + dwc_otg_hcd_qh_free (_qh); +} + +/** Allocates memory for a QH structure. + * @return Returns the memory allocate or NULL on error. */ +static inline dwc_otg_qh_t *dwc_otg_hcd_qh_alloc (void) +{ + return (dwc_otg_qh_t *) kmalloc (sizeof(dwc_otg_qh_t), GFP_KERNEL); +} + +extern dwc_otg_qtd_t *dwc_otg_hcd_qtd_create (struct urb *urb); +extern void dwc_otg_hcd_qtd_init (dwc_otg_qtd_t *qtd, struct urb *urb); +extern int dwc_otg_hcd_qtd_add (dwc_otg_qtd_t *qtd, dwc_otg_hcd_t *dwc_otg_hcd); + +/** Allocates memory for a QTD structure. + * @return Returns the memory allocate or NULL on error. */ +static inline dwc_otg_qtd_t *dwc_otg_hcd_qtd_alloc (void) +{ + return (dwc_otg_qtd_t *) kmalloc (sizeof(dwc_otg_qtd_t), GFP_KERNEL); +} + +/** Frees the memory for a QTD structure. QTD should already be removed from + * list. + * @param[in] _qtd QTD to free.*/ +static inline void dwc_otg_hcd_qtd_free (dwc_otg_qtd_t *_qtd) +{ + kfree (_qtd); +} + +/** Removes a QTD from list. + * @param[in] _qtd QTD to remove from list. */ +static inline void dwc_otg_hcd_qtd_remove (dwc_otg_qtd_t *_qtd) +{ + unsigned long flags; + local_irq_save (flags); + list_del (&_qtd->qtd_list_entry); + local_irq_restore (flags); +} + +/** Remove and free a QTD */ +static inline void dwc_otg_hcd_qtd_remove_and_free (dwc_otg_qtd_t *_qtd) +{ + dwc_otg_hcd_qtd_remove (_qtd); + dwc_otg_hcd_qtd_free (_qtd); +} + +/** @} */ + + +/** @name Internal Functions */ +/** @{ */ +dwc_otg_qh_t *dwc_urb_to_qh(struct urb *_urb); +void dwc_otg_hcd_dump_frrem(dwc_otg_hcd_t *_hcd); +void dwc_otg_hcd_dump_state(dwc_otg_hcd_t *_hcd); +/** @} */ + +/** Gets the usb_host_endpoint associated with an URB. */ +static inline struct usb_host_endpoint *dwc_urb_to_endpoint(struct urb *_urb) +{ + struct usb_device *dev = _urb->dev; + int ep_num = usb_pipeendpoint(_urb->pipe); + + if (usb_pipein(_urb->pipe)) + return dev->ep_in[ep_num]; + else + return dev->ep_out[ep_num]; +} + +/** + * Gets the endpoint number from a _bEndpointAddress argument. The endpoint is + * qualified with its direction (possible 32 endpoints per device). + */ +#define dwc_ep_addr_to_endpoint(_bEndpointAddress_) \ + ((_bEndpointAddress_ & USB_ENDPOINT_NUMBER_MASK) | \ + ((_bEndpointAddress_ & USB_DIR_IN) != 0) << 4) + +/** Gets the QH that contains the list_head */ +#define dwc_list_to_qh(_list_head_ptr_) (container_of(_list_head_ptr_,dwc_otg_qh_t,qh_list_entry)) + +/** Gets the QTD that contains the list_head */ +#define dwc_list_to_qtd(_list_head_ptr_) (container_of(_list_head_ptr_,dwc_otg_qtd_t,qtd_list_entry)) + +/** Check if QH is non-periodic */ +#define dwc_qh_is_non_per(_qh_ptr_) ((_qh_ptr_->ep_type == USB_ENDPOINT_XFER_BULK) || \ + (_qh_ptr_->ep_type == USB_ENDPOINT_XFER_CONTROL)) + +/** High bandwidth multiplier as encoded in highspeed endpoint descriptors */ +#define dwc_hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03)) + +/** Packet size for any kind of endpoint descriptor */ +#define dwc_max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff) + +/** + * Returns true if _frame1 is less than or equal to _frame2. The comparison is + * done modulo DWC_HFNUM_MAX_FRNUM. This accounts for the rollover of the + * frame number when the max frame number is reached. + */ +static inline int dwc_frame_num_le(uint16_t _frame1, uint16_t _frame2) +{ + return ((_frame2 - _frame1) & DWC_HFNUM_MAX_FRNUM) <= + (DWC_HFNUM_MAX_FRNUM >> 1); +} + +/** + * Returns true if _frame1 is greater than _frame2. The comparison is done + * modulo DWC_HFNUM_MAX_FRNUM. This accounts for the rollover of the frame + * number when the max frame number is reached. + */ +static inline int dwc_frame_num_gt(uint16_t _frame1, uint16_t _frame2) +{ + return (_frame1 != _frame2) && + (((_frame1 - _frame2) & DWC_HFNUM_MAX_FRNUM) < + (DWC_HFNUM_MAX_FRNUM >> 1)); +} + +/** + * Increments _frame by the amount specified by _inc. The addition is done + * modulo DWC_HFNUM_MAX_FRNUM. Returns the incremented value. + */ +static inline uint16_t dwc_frame_num_inc(uint16_t _frame, uint16_t _inc) +{ + return (_frame + _inc) & DWC_HFNUM_MAX_FRNUM; +} + +static inline uint16_t dwc_full_frame_num (uint16_t _frame) +{ + return ((_frame) & DWC_HFNUM_MAX_FRNUM) >> 3; +} + +static inline uint16_t dwc_micro_frame_num (uint16_t _frame) +{ + return (_frame) & 0x7; +} + +#ifdef CONFIG_DWC_DEBUG +/** + * Macro to sample the remaining PHY clocks left in the current frame. This + * may be used during debugging to determine the average time it takes to + * execute sections of code. There are two possible sample points, "a" and + * "b", so the _letter argument must be one of these values. + * + * To dump the average sample times, read the "hcd_frrem" sysfs attribute. For + * example, "cat /sys/devices/lm0/hcd_frrem". + */ +#define dwc_sample_frrem(_hcd, _qh, _letter) \ +{ \ + hfnum_data_t hfnum; \ + dwc_otg_qtd_t *qtd; \ + qtd = list_entry(_qh->qtd_list.next, dwc_otg_qtd_t, qtd_list_entry); \ + if (usb_pipeint(qtd->urb->pipe) && _qh->start_split_frame != 0 && !qtd->complete_split) { \ + hfnum.d32 = dwc_read_reg32(&_hcd->core_if->host_if->host_global_regs->hfnum); \ + switch (hfnum.b.frnum & 0x7) { \ + case 7: \ + _hcd->hfnum_7_samples_##_letter++; \ + _hcd->hfnum_7_frrem_accum_##_letter += hfnum.b.frrem; \ + break; \ + case 0: \ + _hcd->hfnum_0_samples_##_letter++; \ + _hcd->hfnum_0_frrem_accum_##_letter += hfnum.b.frrem; \ + break; \ + default: \ + _hcd->hfnum_other_samples_##_letter++; \ + _hcd->hfnum_other_frrem_accum_##_letter += hfnum.b.frrem; \ + break; \ + } \ + } \ +} +#else +#define dwc_sample_frrem(_hcd, _qh, _letter) +#endif +#endif +#endif /* DWC_DEVICE_ONLY */ |