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 */ 94