LXR uboot/drivers/usb/gadget/pxa25x

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * Intel PXA25x on-chip full speed USB device controller
   4 *
   5 * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
   6 * Copyright (C) 2003 David Brownell
   7 * Copyright (C) 2012 Lukasz Dalek <luk0104@gmail.com>
   8 */
   9
  10#ifndef __LINUX_USB_GADGET_PXA25X_H
  11#define __LINUX_USB_GADGET_PXA25X_H
  12
  13#include <linux/types.h>
  14#include <asm/arch/regs-usb.h>
  15
  16/*
  17 * Prefetching support - only ARMv5.
  18 */
  19
  20#ifdef ARCH_HAS_PREFETCH
  21static inline void prefetch(const void *ptr)
  22{
  23        __asm__ __volatile__(
  24                "pld\t%a0"
  25                :
  26                : "p" (ptr)
  27                : "cc");
  28}
  29
  30#define prefetchw(ptr)  prefetch(ptr)
  31#endif /* ARCH_HAS_PREFETCH */
  32
  33/*-------------------------------------------------------------------------*/
  34
  35#define UDC_REGS        ((struct pxa25x_udc_regs *)PXA25X_UDC_BASE)
  36
  37/*-------------------------------------------------------------------------*/
  38
  39struct pxa2xx_udc_mach_info {
  40        int  (*udc_is_connected)(void);         /* do we see host? */
  41        void (*udc_command)(int cmd);
  42#define PXA2XX_UDC_CMD_CONNECT          0       /* let host see us */
  43#define PXA2XX_UDC_CMD_DISCONNECT       1       /* so host won't see us */
  44};
  45
  46struct pxa25x_udc;
  47
  48struct pxa25x_ep {
  49        struct usb_ep                           ep;
  50        struct pxa25x_udc                       *dev;
  51
  52        const struct usb_endpoint_descriptor    *desc;
  53        struct list_head                        queue;
  54        unsigned long                           pio_irqs;
  55
  56        unsigned short                          fifo_size;
  57        u8                                      bEndpointAddress;
  58        u8                                      bmAttributes;
  59
  60        unsigned                                stopped:1;
  61
  62        /* UDCCS = UDC Control/Status for this EP
  63         * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
  64         * UDDR = UDC Endpoint Data Register (the fifo)
  65         * DRCM = DMA Request Channel Map
  66         */
  67        u32                                     *reg_udccs;
  68        u32                                     *reg_ubcr;
  69        u32                                     *reg_uddr;
  70};
  71
  72struct pxa25x_request {
  73        struct usb_request                      req;
  74        struct list_head                        queue;
  75};
  76
  77enum ep0_state {
  78        EP0_IDLE,
  79        EP0_IN_DATA_PHASE,
  80        EP0_OUT_DATA_PHASE,
  81        EP0_END_XFER,
  82        EP0_STALL,
  83};
  84
  85#define EP0_FIFO_SIZE   16U
  86#define BULK_FIFO_SIZE  64U
  87#define ISO_FIFO_SIZE   256U
  88#define INT_FIFO_SIZE   8U
  89
  90struct udc_stats {
  91        struct ep0stats {
  92                unsigned long           ops;
  93                unsigned long           bytes;
  94        } read, write;
  95        unsigned long                   irqs;
  96};
  97
  98#ifdef CONFIG_USB_PXA25X_SMALL
  99/* when memory's tight, SMALL config saves code+data.  */
 100#define PXA_UDC_NUM_ENDPOINTS   3
 101#endif
 102
 103#ifndef PXA_UDC_NUM_ENDPOINTS
 104#define PXA_UDC_NUM_ENDPOINTS   16
 105#endif
 106
 107struct pxa25x_watchdog {
 108        unsigned                                running:1;
 109        ulong                                   period;
 110        ulong                                   base;
 111        struct pxa25x_udc                       *udc;
 112
 113        void (*function)(struct pxa25x_udc *udc);
 114};
 115
 116struct pxa25x_udc {
 117        struct usb_gadget                       gadget;
 118        struct usb_gadget_driver                *driver;
 119        struct pxa25x_udc_regs                  *regs;
 120
 121        enum ep0_state                          ep0state;
 122        struct udc_stats                        stats;
 123        unsigned                                got_irq:1,
 124                                                pullup:1,
 125                                                has_cfr:1,
 126                                                req_pending:1,
 127                                                req_std:1,
 128                                                req_config:1,
 129                                                active:1;
 130
 131        struct clk                              *clk;
 132        struct pxa2xx_udc_mach_info             *mach;
 133        u64                                     dma_mask;
 134        struct pxa25x_ep                        ep[PXA_UDC_NUM_ENDPOINTS];
 135
 136        struct pxa25x_watchdog                  watchdog;
 137};
 138
 139/*-------------------------------------------------------------------------*/
 140
 141static struct pxa25x_udc *the_controller;
 142
 143/*-------------------------------------------------------------------------*/
 144
 145#ifndef DEBUG
 146# define NOISY 0
 147#endif
 148
 149#endif /* __LINUX_USB_GADGET_PXA25X_H */
 150