LXR uboot/drivers/usb/gadget/pxa25x

   1/*
   2 * Intel PXA25x on-chip full speed USB device controller
   3 *
   4 * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
   5 * Copyright (C) 2003 David Brownell
   6 * Copyright (C) 2012 Lukasz Dalek <luk0104@gmail.com>
   7 *
   8 * SPDX-License-Identifier:     GPL-2.0+
   9 */
  10
  11#ifndef __LINUX_USB_GADGET_PXA25X_H
  12#define __LINUX_USB_GADGET_PXA25X_H
  13
  14#include <linux/types.h>
  15#include <asm/arch/regs-usb.h>
  16
  17/*
  18 * Prefetching support - only ARMv5.
  19 */
  20
  21#ifdef ARCH_HAS_PREFETCH
  22static inline void prefetch(const void *ptr)
  23{
  24        __asm__ __volatile__(
  25                "pld\t%a0"
  26                :
  27                : "p" (ptr)
  28                : "cc");
  29}
  30
  31#define prefetchw(ptr)  prefetch(ptr)
  32#endif /* ARCH_HAS_PREFETCH */
  33
  34/*-------------------------------------------------------------------------*/
  35
  36#define UDC_REGS        ((struct pxa25x_udc_regs *)PXA25X_UDC_BASE)
  37
  38/*-------------------------------------------------------------------------*/
  39
  40struct pxa2xx_udc_mach_info {
  41        int  (*udc_is_connected)(void);         /* do we see host? */
  42        void (*udc_command)(int cmd);
  43#define PXA2XX_UDC_CMD_CONNECT          0       /* let host see us */
  44#define PXA2XX_UDC_CMD_DISCONNECT       1       /* so host won't see us */
  45};
  46
  47struct pxa25x_udc;
  48
  49struct pxa25x_ep {
  50        struct usb_ep                           ep;
  51        struct pxa25x_udc                       *dev;
  52
  53        const struct usb_endpoint_descriptor    *desc;
  54        struct list_head                        queue;
  55        unsigned long                           pio_irqs;
  56
  57        unsigned short                          fifo_size;
  58        u8                                      bEndpointAddress;
  59        u8                                      bmAttributes;
  60
  61        unsigned                                stopped:1;
  62
  63        /* UDCCS = UDC Control/Status for this EP
  64         * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
  65         * UDDR = UDC Endpoint Data Register (the fifo)
  66         * DRCM = DMA Request Channel Map
  67         */
  68        u32                                     *reg_udccs;
  69        u32                                     *reg_ubcr;
  70        u32                                     *reg_uddr;
  71};
  72
  73struct pxa25x_request {
  74        struct usb_request                      req;
  75        struct list_head                        queue;
  76};
  77
  78enum ep0_state {
  79        EP0_IDLE,
  80        EP0_IN_DATA_PHASE,
  81        EP0_OUT_DATA_PHASE,
  82        EP0_END_XFER,
  83        EP0_STALL,
  84};
  85
  86#define EP0_FIFO_SIZE   16U
  87#define BULK_FIFO_SIZE  64U
  88#define ISO_FIFO_SIZE   256U
  89#define INT_FIFO_SIZE   8U
  90
  91struct udc_stats {
  92        struct ep0stats {
  93                unsigned long           ops;
  94                unsigned long           bytes;
  95        } read, write;
  96        unsigned long                   irqs;
  97};
  98
  99#ifdef CONFIG_USB_PXA25X_SMALL
 100/* when memory's tight, SMALL config saves code+data.  */
 101#define PXA_UDC_NUM_ENDPOINTS   3
 102#endif
 103
 104#ifndef PXA_UDC_NUM_ENDPOINTS
 105#define PXA_UDC_NUM_ENDPOINTS   16
 106#endif
 107
 108struct pxa25x_watchdog {
 109        unsigned                                running:1;
 110        ulong                                   period;
 111        ulong                                   base;
 112        struct pxa25x_udc                       *udc;
 113
 114        void (*function)(struct pxa25x_udc *udc);
 115};
 116
 117struct pxa25x_udc {
 118        struct usb_gadget                       gadget;
 119        struct usb_gadget_driver                *driver;
 120        struct pxa25x_udc_regs                  *regs;
 121
 122        enum ep0_state                          ep0state;
 123        struct udc_stats                        stats;
 124        unsigned                                got_irq:1,
 125                                                pullup:1,
 126                                                has_cfr:1,
 127                                                req_pending:1,
 128                                                req_std:1,
 129                                                req_config:1,
 130                                                active:1;
 131
 132        struct clk                              *clk;
 133        struct pxa2xx_udc_mach_info             *mach;
 134        u64                                     dma_mask;
 135        struct pxa25x_ep                        ep[PXA_UDC_NUM_ENDPOINTS];
 136
 137        struct pxa25x_watchdog                  watchdog;
 138};
 139
 140/*-------------------------------------------------------------------------*/
 141
 142static struct pxa25x_udc *the_controller;
 143
 144/*-------------------------------------------------------------------------*/
 145
 146#ifndef DEBUG
 147# define NOISY 0
 148#endif
 149
 150#endif /* __LINUX_USB_GADGET_PXA25X_H */
 151