/*
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* Intel PXA25x on-chip full speed USB device controller
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*
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* Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
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* Copyright (C) 2003 David Brownell
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* Copyright (C) 2012 Lukasz Dalek <luk0104@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __LINUX_USB_GADGET_PXA25X_H
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#define __LINUX_USB_GADGET_PXA25X_H
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#include <linux/types.h>
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#include <asm/arch/regs-usb.h>
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/*
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* Prefetching support - only ARMv5.
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*/
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#ifdef ARCH_HAS_PREFETCH
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static inline void prefetch(const void *ptr)
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{
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__asm__ __volatile__(
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"pld\t%a0"
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:
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: "p" (ptr)
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: "cc");
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}
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#define prefetchw(ptr) prefetch(ptr)
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#endif /* ARCH_HAS_PREFETCH */
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/*-------------------------------------------------------------------------*/
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#define UDC_REGS ((struct pxa25x_udc_regs *)PXA25X_UDC_BASE)
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/*-------------------------------------------------------------------------*/
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struct pxa2xx_udc_mach_info {
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int (*udc_is_connected)(void); /* do we see host? */
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void (*udc_command)(int cmd);
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#define PXA2XX_UDC_CMD_CONNECT 0 /* let host see us */
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#define PXA2XX_UDC_CMD_DISCONNECT 1 /* so host won't see us */
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};
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struct pxa25x_udc;
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struct pxa25x_ep {
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struct usb_ep ep;
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struct pxa25x_udc *dev;
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const struct usb_endpoint_descriptor *desc;
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struct list_head queue;
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unsigned long pio_irqs;
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unsigned short fifo_size;
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u8 bEndpointAddress;
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u8 bmAttributes;
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unsigned stopped:1;
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/* UDCCS = UDC Control/Status for this EP
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* UBCR = UDC Byte Count Remaining (contents of OUT fifo)
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* UDDR = UDC Endpoint Data Register (the fifo)
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* DRCM = DMA Request Channel Map
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*/
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u32 *reg_udccs;
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u32 *reg_ubcr;
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u32 *reg_uddr;
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};
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struct pxa25x_request {
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struct usb_request req;
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struct list_head queue;
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};
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enum ep0_state {
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EP0_IDLE,
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EP0_IN_DATA_PHASE,
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EP0_OUT_DATA_PHASE,
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EP0_END_XFER,
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EP0_STALL,
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};
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#define EP0_FIFO_SIZE 16U
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#define BULK_FIFO_SIZE 64U
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#define ISO_FIFO_SIZE 256U
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#define INT_FIFO_SIZE 8U
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struct udc_stats {
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struct ep0stats {
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unsigned long ops;
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unsigned long bytes;
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} read, write;
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unsigned long irqs;
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};
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#ifdef CONFIG_USB_PXA25X_SMALL
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/* when memory's tight, SMALL config saves code+data. */
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#define PXA_UDC_NUM_ENDPOINTS 3
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#endif
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#ifndef PXA_UDC_NUM_ENDPOINTS
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#define PXA_UDC_NUM_ENDPOINTS 16
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#endif
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struct pxa25x_watchdog {
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unsigned running:1;
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ulong period;
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ulong base;
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struct pxa25x_udc *udc;
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void (*function)(struct pxa25x_udc *udc);
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};
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struct pxa25x_udc {
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struct usb_gadget gadget;
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struct usb_gadget_driver *driver;
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struct pxa25x_udc_regs *regs;
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enum ep0_state ep0state;
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struct udc_stats stats;
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unsigned got_irq:1,
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pullup:1,
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has_cfr:1,
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req_pending:1,
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req_std:1,
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req_config:1,
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active:1;
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struct clk *clk;
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struct pxa2xx_udc_mach_info *mach;
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u64 dma_mask;
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struct pxa25x_ep ep[PXA_UDC_NUM_ENDPOINTS];
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struct pxa25x_watchdog watchdog;
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};
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/*-------------------------------------------------------------------------*/
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static struct pxa25x_udc *the_controller;
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/*-------------------------------------------------------------------------*/
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#ifndef DEBUG
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# define NOISY 0
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#endif
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#endif /* __LINUX_USB_GADGET_PXA25X_H */
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