linux/include/linux/usb/net2280.h

// SPDX-License-Identifier: GPL-2.0+
/*
 * NetChip 2280 high/full speed USB device controller.
 * Unlike many such controllers, this one talks PCI.
 *
 * Copyright (C) 2002 NetChip Technology, Inc. (http://www.netchip.com)
 * Copyright (C) 2003 David Brownell
 */

#ifndef __LINUX_USB_NET2280_H
#define __LINUX_USB_NET2280_H

/*-------------------------------------------------------------------------*/

/* NET2280 MEMORY MAPPED REGISTERS
 *
 * The register layout came from the chip documentation, and the bit
 * number definitions were extracted from chip specification.
 *
 * Use the shift operator ('<<') to build bit masks, with readl/writel
 * to access the registers through PCI.
 */

/* main registers, BAR0 + 0x0000 */
struct net2280_regs { … } __attribute__ ((packed));

/* usb control, BAR0 + 0x0080 */
struct net2280_usb_regs { … } __attribute__ ((packed));

/* pci control, BAR0 + 0x0100 */
struct net2280_pci_regs { … } __attribute__ ((packed));

/* dma control, BAR0 + 0x0180 ... array of four structs like this,
 * for channels 0..3.  see also struct net2280_dma:  descriptor
 * that can be loaded into some of these registers.
 */
struct net2280_dma_regs { … } __attribute__ ((packed));

/* dedicated endpoint registers, BAR0 + 0x0200 */

struct net2280_dep_regs { … } __attribute__ ((packed));

/* configurable endpoint registers, BAR0 + 0x0300 ... array of seven structs
 * like this, for ep0 then the configurable endpoints A..F
 * ep0 reserved for control; E and F have only 64 bytes of fifo
 */
struct net2280_ep_regs { … } __attribute__ ((packed));

#endif /* __LINUX_USB_NET2280_H */