root/drivers/usb/chipidea/udc.h

INCLUDED FROM

DEFINITIONS

1. ci_hdrc_gadget_init
2. ci_hdrc_gadget_destroy

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * udc.h - ChipIdea UDC structures
   4  *
   5  * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
   6  *
   7  * Author: David Lopo
   8  */
   9 
  10 #ifndef __DRIVERS_USB_CHIPIDEA_UDC_H
  11 #define __DRIVERS_USB_CHIPIDEA_UDC_H
  12 
  13 #include <linux/list.h>
  14 
  15 #define CTRL_PAYLOAD_MAX   64
  16 #define RX        0  /* similar to USB_DIR_OUT but can be used as an index */
  17 #define TX        1  /* similar to USB_DIR_IN  but can be used as an index */
  18 
  19 /* DMA layout of transfer descriptors */
  20 struct ci_hw_td {
  21         /* 0 */
  22         __le32 next;
  23 #define TD_TERMINATE          BIT(0)
  24 #define TD_ADDR_MASK          (0xFFFFFFEUL << 5)
  25         /* 1 */
  26         __le32 token;
  27 #define TD_STATUS             (0x00FFUL <<  0)
  28 #define TD_STATUS_TR_ERR      BIT(3)
  29 #define TD_STATUS_DT_ERR      BIT(5)
  30 #define TD_STATUS_HALTED      BIT(6)
  31 #define TD_STATUS_ACTIVE      BIT(7)
  32 #define TD_MULTO              (0x0003UL << 10)
  33 #define TD_IOC                BIT(15)
  34 #define TD_TOTAL_BYTES        (0x7FFFUL << 16)
  35         /* 2 */
  36         __le32 page[5];
  37 #define TD_CURR_OFFSET        (0x0FFFUL <<  0)
  38 #define TD_FRAME_NUM          (0x07FFUL <<  0)
  39 #define TD_RESERVED_MASK      (0x0FFFUL <<  0)
  40 } __attribute__ ((packed, aligned(4)));
  41 
  42 /* DMA layout of queue heads */
  43 struct ci_hw_qh {
  44         /* 0 */
  45         __le32 cap;
  46 #define QH_IOS                BIT(15)
  47 #define QH_MAX_PKT            (0x07FFUL << 16)
  48 #define QH_ZLT                BIT(29)
  49 #define QH_MULT               (0x0003UL << 30)
  50 #define QH_ISO_MULT(x)          ((x >> 11) & 0x03)
  51         /* 1 */
  52         __le32 curr;
  53         /* 2 - 8 */
  54         struct ci_hw_td         td;
  55         /* 9 */
  56         __le32 RESERVED;
  57         struct usb_ctrlrequest   setup;
  58 } __attribute__ ((packed, aligned(4)));
  59 
  60 struct td_node {
  61         struct list_head        td;
  62         dma_addr_t              dma;
  63         struct ci_hw_td         *ptr;
  64 };
  65 
  66 /**
  67  * struct ci_hw_req - usb request representation
  68  * @req: request structure for gadget drivers
  69  * @queue: link to QH list
  70  * @ptr: transfer descriptor for this request
  71  * @dma: dma address for the transfer descriptor
  72  * @zptr: transfer descriptor for the zero packet
  73  * @zdma: dma address of the zero packet's transfer descriptor
  74  */
  75 struct ci_hw_req {
  76         struct usb_request      req;
  77         struct list_head        queue;
  78         struct list_head        tds;
  79 };
  80 
  81 #ifdef CONFIG_USB_CHIPIDEA_UDC
  82 
  83 int ci_hdrc_gadget_init(struct ci_hdrc *ci);
  84 void ci_hdrc_gadget_destroy(struct ci_hdrc *ci);
  85 
  86 #else
  87 
  88 static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci)
  89 {
  90         return -ENXIO;
  91 }
  92 
  93 static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci)
  94 {
  95 
  96 }
  97 
  98 #endif
  99 
 100 #endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */