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