drivers/usb/gadget/pxa25x_udc.h

   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
  22 static 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
  40 struct 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
  47 struct pxa25x_udc;
  48
  49 struct 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
  73 struct pxa25x_request {
  74         struct usb_request                      req;
  75         struct list_head                        queue;
  76 };
  77
  78 enum 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
  91 struct 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
 108 struct 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
 117 struct 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
 142 static 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 */