drivers/usb/chipidea/udc.h

   1 /*
   2  * udc.h - ChipIdea UDC structures
   3  *
   4  * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
   5  *
   6  * Author: David Lopo
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef __DRIVERS_USB_CHIPIDEA_UDC_H
  14 #define __DRIVERS_USB_CHIPIDEA_UDC_H
  15
  16 #include <linux/list.h>
  17
  18 #define CTRL_PAYLOAD_MAX   64
  19 #define RX        0  /* similar to USB_DIR_OUT but can be used as an index */
  20 #define TX        1  /* similar to USB_DIR_IN  but can be used as an index */
  21
  22 /* DMA layout of transfer descriptors */
  23 struct ci13xxx_td {
  24         /* 0 */
  25         u32 next;
  26 #define TD_TERMINATE          BIT(0)
  27 #define TD_ADDR_MASK          (0xFFFFFFEUL << 5)
  28         /* 1 */
  29         u32 token;
  30 #define TD_STATUS             (0x00FFUL <<  0)
  31 #define TD_STATUS_TR_ERR      BIT(3)
  32 #define TD_STATUS_DT_ERR      BIT(5)
  33 #define TD_STATUS_HALTED      BIT(6)
  34 #define TD_STATUS_ACTIVE      BIT(7)
  35 #define TD_MULTO              (0x0003UL << 10)
  36 #define TD_IOC                BIT(15)
  37 #define TD_TOTAL_BYTES        (0x7FFFUL << 16)
  38         /* 2 */
  39         u32 page[5];
  40 #define TD_CURR_OFFSET        (0x0FFFUL <<  0)
  41 #define TD_FRAME_NUM          (0x07FFUL <<  0)
  42 #define TD_RESERVED_MASK      (0x0FFFUL <<  0)
  43 } __attribute__ ((packed));
  44
  45 /* DMA layout of queue heads */
  46 struct ci13xxx_qh {
  47         /* 0 */
  48         u32 cap;
  49 #define QH_IOS                BIT(15)
  50 #define QH_MAX_PKT            (0x07FFUL << 16)
  51 #define QH_ZLT                BIT(29)
  52 #define QH_MULT               (0x0003UL << 30)
  53         /* 1 */
  54         u32 curr;
  55         /* 2 - 8 */
  56         struct ci13xxx_td        td;
  57         /* 9 */
  58         u32 RESERVED;
  59         struct usb_ctrlrequest   setup;
  60 } __attribute__ ((packed));
  61
  62 /**
  63  * struct ci13xxx_req - usb request representation
  64  * @req: request structure for gadget drivers
  65  * @queue: link to QH list
  66  * @ptr: transfer descriptor for this request
  67  * @dma: dma address for the transfer descriptor
  68  * @zptr: transfer descriptor for the zero packet
  69  * @zdma: dma address of the zero packet's transfer descriptor
  70  */
  71 struct ci13xxx_req {
  72         struct usb_request      req;
  73         struct list_head        queue;
  74         struct ci13xxx_td       *ptr;
  75         dma_addr_t              dma;
  76         struct ci13xxx_td       *zptr;
  77         dma_addr_t              zdma;
  78 };
  79
  80 #ifdef CONFIG_USB_CHIPIDEA_UDC
  81
  82 int ci_hdrc_gadget_init(struct ci13xxx *ci);
  83
  84 #else
  85
  86 static inline int ci_hdrc_gadget_init(struct ci13xxx *ci)
  87 {
  88         return -ENXIO;
  89 }
  90
  91 #endif
  92
  93 #endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */