| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame] | 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 ci_hw_td { |
| 24 | /* 0 */ |
| 25 | __le32 next; |
| 26 | #define TD_TERMINATE BIT(0) |
| 27 | #define TD_ADDR_MASK (0xFFFFFFEUL << 5) |
| 28 | /* 1 */ |
| 29 | __le32 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 | __le32 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, aligned(4))); |
| 44 | |
| 45 | /* DMA layout of queue heads */ |
| 46 | struct ci_hw_qh { |
| 47 | /* 0 */ |
| 48 | __le32 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 | #define QH_ISO_MULT(x) ((x >> 11) & 0x03) |
| 54 | /* 1 */ |
| 55 | __le32 curr; |
| 56 | /* 2 - 8 */ |
| 57 | struct ci_hw_td td; |
| 58 | /* 9 */ |
| 59 | __le32 RESERVED; |
| 60 | struct usb_ctrlrequest setup; |
| 61 | } __attribute__ ((packed, aligned(4))); |
| 62 | |
| 63 | struct td_node { |
| 64 | struct list_head td; |
| 65 | dma_addr_t dma; |
| 66 | struct ci_hw_td *ptr; |
| 67 | }; |
| 68 | |
| 69 | /** |
| 70 | * struct ci_hw_req - usb request representation |
| 71 | * @req: request structure for gadget drivers |
| 72 | * @queue: link to QH list |
| 73 | * @ptr: transfer descriptor for this request |
| 74 | * @dma: dma address for the transfer descriptor |
| 75 | * @zptr: transfer descriptor for the zero packet |
| 76 | * @zdma: dma address of the zero packet's transfer descriptor |
| 77 | */ |
| 78 | struct ci_hw_req { |
| 79 | struct usb_request req; |
| 80 | struct list_head queue; |
| 81 | struct list_head tds; |
| 82 | }; |
| 83 | |
| 84 | #ifdef CONFIG_USB_CHIPIDEA_UDC |
| 85 | |
| 86 | int ci_hdrc_gadget_init(struct ci_hdrc *ci); |
| 87 | void ci_hdrc_gadget_destroy(struct ci_hdrc *ci); |
| 88 | |
| 89 | #else |
| 90 | |
| 91 | static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci) |
| 92 | { |
| 93 | return -ENXIO; |
| 94 | } |
| 95 | |
| 96 | static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci) |
| 97 | { |
| 98 | |
| 99 | } |
| 100 | |
| 101 | #endif |
| 102 | |
| 103 | #endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */ |