cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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udc.h (2339B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * udc.h - ChipIdea UDC structures
      4 *
      5 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
      6 *
      7 * Author: David Lopo
      8 */
      9
     10#ifndef __DRIVERS_USB_CHIPIDEA_UDC_H
     11#define __DRIVERS_USB_CHIPIDEA_UDC_H
     12
     13#include <linux/list.h>
     14
     15#define CTRL_PAYLOAD_MAX   64
     16#define RX        0  /* similar to USB_DIR_OUT but can be used as an index */
     17#define TX        1  /* similar to USB_DIR_IN  but can be used as an index */
     18
     19/* DMA layout of transfer descriptors */
     20struct ci_hw_td {
     21	/* 0 */
     22	__le32 next;
     23#define TD_TERMINATE          BIT(0)
     24#define TD_ADDR_MASK          (0xFFFFFFEUL << 5)
     25	/* 1 */
     26	__le32 token;
     27#define TD_STATUS             (0x00FFUL <<  0)
     28#define TD_STATUS_TR_ERR      BIT(3)
     29#define TD_STATUS_DT_ERR      BIT(5)
     30#define TD_STATUS_HALTED      BIT(6)
     31#define TD_STATUS_ACTIVE      BIT(7)
     32#define TD_MULTO              (0x0003UL << 10)
     33#define TD_IOC                BIT(15)
     34#define TD_TOTAL_BYTES        (0x7FFFUL << 16)
     35	/* 2 */
     36	__le32 page[5];
     37#define TD_CURR_OFFSET        (0x0FFFUL <<  0)
     38#define TD_FRAME_NUM          (0x07FFUL <<  0)
     39#define TD_RESERVED_MASK      (0x0FFFUL <<  0)
     40} __attribute__ ((packed, aligned(4)));
     41
     42/* DMA layout of queue heads */
     43struct ci_hw_qh {
     44	/* 0 */
     45	__le32 cap;
     46#define QH_IOS                BIT(15)
     47#define QH_MAX_PKT            (0x07FFUL << 16)
     48#define QH_ZLT                BIT(29)
     49#define QH_MULT               (0x0003UL << 30)
     50#define QH_ISO_MULT(x)		((x >> 11) & 0x03)
     51	/* 1 */
     52	__le32 curr;
     53	/* 2 - 8 */
     54	struct ci_hw_td		td;
     55	/* 9 */
     56	__le32 RESERVED;
     57	struct usb_ctrlrequest   setup;
     58} __attribute__ ((packed, aligned(4)));
     59
     60struct td_node {
     61	struct list_head	td;
     62	dma_addr_t		dma;
     63	struct ci_hw_td		*ptr;
     64	int			td_remaining_size;
     65};
     66
     67/**
     68 * struct ci_hw_req - usb request representation
     69 * @req: request structure for gadget drivers
     70 * @queue: link to QH list
     71 * @tds: link to TD list
     72 */
     73struct ci_hw_req {
     74	struct usb_request	req;
     75	struct list_head	queue;
     76	struct list_head	tds;
     77};
     78
     79#ifdef CONFIG_USB_CHIPIDEA_UDC
     80
     81int ci_hdrc_gadget_init(struct ci_hdrc *ci);
     82void ci_hdrc_gadget_destroy(struct ci_hdrc *ci);
     83
     84#else
     85
     86static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci)
     87{
     88	return -ENXIO;
     89}
     90
     91static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci)
     92{
     93
     94}
     95
     96#endif
     97
     98#endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */