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98 lines
2.3 KiB
98 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* udc.h - ChipIdea UDC structures |
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* |
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* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. |
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* |
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* Author: David Lopo |
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*/ |
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#ifndef __DRIVERS_USB_CHIPIDEA_UDC_H |
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#define __DRIVERS_USB_CHIPIDEA_UDC_H |
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#include <linux/list.h> |
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#define CTRL_PAYLOAD_MAX 64 |
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#define RX 0 /* similar to USB_DIR_OUT but can be used as an index */ |
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#define TX 1 /* similar to USB_DIR_IN but can be used as an index */ |
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/* DMA layout of transfer descriptors */ |
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struct ci_hw_td { |
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/* 0 */ |
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__le32 next; |
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#define TD_TERMINATE BIT(0) |
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#define TD_ADDR_MASK (0xFFFFFFEUL << 5) |
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/* 1 */ |
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__le32 token; |
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#define TD_STATUS (0x00FFUL << 0) |
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#define TD_STATUS_TR_ERR BIT(3) |
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#define TD_STATUS_DT_ERR BIT(5) |
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#define TD_STATUS_HALTED BIT(6) |
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#define TD_STATUS_ACTIVE BIT(7) |
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#define TD_MULTO (0x0003UL << 10) |
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#define TD_IOC BIT(15) |
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#define TD_TOTAL_BYTES (0x7FFFUL << 16) |
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/* 2 */ |
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__le32 page[5]; |
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#define TD_CURR_OFFSET (0x0FFFUL << 0) |
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#define TD_FRAME_NUM (0x07FFUL << 0) |
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#define TD_RESERVED_MASK (0x0FFFUL << 0) |
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} __attribute__ ((packed, aligned(4))); |
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/* DMA layout of queue heads */ |
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struct ci_hw_qh { |
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/* 0 */ |
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__le32 cap; |
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#define QH_IOS BIT(15) |
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#define QH_MAX_PKT (0x07FFUL << 16) |
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#define QH_ZLT BIT(29) |
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#define QH_MULT (0x0003UL << 30) |
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#define QH_ISO_MULT(x) ((x >> 11) & 0x03) |
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/* 1 */ |
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__le32 curr; |
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/* 2 - 8 */ |
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struct ci_hw_td td; |
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/* 9 */ |
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__le32 RESERVED; |
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struct usb_ctrlrequest setup; |
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} __attribute__ ((packed, aligned(4))); |
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struct td_node { |
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struct list_head td; |
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dma_addr_t dma; |
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struct ci_hw_td *ptr; |
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int td_remaining_size; |
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}; |
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/** |
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* struct ci_hw_req - usb request representation |
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* @req: request structure for gadget drivers |
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* @queue: link to QH list |
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* @tds: link to TD list |
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*/ |
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struct ci_hw_req { |
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struct usb_request req; |
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struct list_head queue; |
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struct list_head tds; |
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}; |
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#ifdef CONFIG_USB_CHIPIDEA_UDC |
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int ci_hdrc_gadget_init(struct ci_hdrc *ci); |
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void ci_hdrc_gadget_destroy(struct ci_hdrc *ci); |
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#else |
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static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci) |
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{ |
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return -ENXIO; |
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} |
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static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci) |
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{ |
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} |
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#endif |
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#endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */
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