101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
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// 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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};
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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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* @ptr: transfer descriptor for this request
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* @dma: dma address for the transfer descriptor
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* @zptr: transfer descriptor for the zero packet
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* @zdma: dma address of the zero packet's transfer descriptor
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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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