LXR linux/drivers/usb/musb/blackfin.h

   1/*
   2 * Copyright (C) 2007 by Analog Devices, Inc.
   3 *
   4 * The Inventra Controller Driver for Linux is free software; you
   5 * can redistribute it and/or modify it under the terms of the GNU
   6 * General Public License version 2 as published by the Free Software
   7 * Foundation.
   8 */
   9
  10#ifndef __MUSB_BLACKFIN_H__
  11#define __MUSB_BLACKFIN_H__
  12
  13/*
  14 * Blackfin specific definitions
  15 */
  16
  17/* Anomalies notes:
  18 *
  19 *  05000450 - USB DMA Mode 1 Short Packet Data Corruption:
  20 *             MUSB driver is designed to transfer buffer of N * maxpacket size
  21 *             in DMA mode 1 and leave the rest of the data to the next
  22 *             transfer in DMA mode 0, so we never transmit a short packet in
  23 *             DMA mode 1.
  24 *
  25 *  05000463 - This anomaly doesn't affect this driver since it
  26 *             never uses L1 or L2 memory as data destination.
  27 *
  28 *  05000464 - This anomaly doesn't affect this driver since it
  29 *             never uses L1 or L2 memory as data source.
  30 *
  31 *  05000465 - The anomaly can be seen when SCLK is over 100 MHz, and there is
  32 *             no way to workaround for bulk endpoints.  Since the wMaxPackSize
  33 *             of bulk is less than or equal to 512, while the fifo size of
  34 *             endpoint 5, 6, 7 is 1024, the double buffer mode is enabled
  35 *             automatically when these endpoints are used for bulk OUT.
  36 *
  37 *  05000466 - This anomaly doesn't affect this driver since it never mixes
  38 *             concurrent DMA and core accesses to the TX endpoint FIFOs.
  39 *
  40 *  05000467 - The workaround for this anomaly will introduce another
  41 *             anomaly - 05000465.
  42 */
  43
  44/* The Mentor USB DMA engine on BF52x (silicon v0.0 and v0.1) seems to be
  45 * unstable in host mode.  This may be caused by Anomaly 05000380.  After
  46 * digging out the root cause, we will change this number accordingly.
  47 * So, need to either use silicon v0.2+ or disable DMA mode in MUSB.
  48 */
  49#if ANOMALY_05000380 && defined(CONFIG_BF52x) && \
  50        !defined(CONFIG_MUSB_PIO_ONLY)
  51# error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1"
  52#endif
  53
  54#undef DUMP_FIFO_DATA
  55#ifdef DUMP_FIFO_DATA
  56static void dump_fifo_data(u8 *buf, u16 len)
  57{
  58        u8 *tmp = buf;
  59        int i;
  60
  61        for (i = 0; i < len; i++) {
  62                if (!(i % 16) && i)
  63                        pr_debug("\n");
  64                pr_debug("%02x ", *tmp++);
  65        }
  66        pr_debug("\n");
  67}
  68#else
  69#define dump_fifo_data(buf, len)        do {} while (0)
  70#endif
  71
  72
  73#define USB_DMA_BASE            USB_DMA_INTERRUPT
  74#define USB_DMAx_CTRL           0x04
  75#define USB_DMAx_ADDR_LOW       0x08
  76#define USB_DMAx_ADDR_HIGH      0x0C
  77#define USB_DMAx_COUNT_LOW      0x10
  78#define USB_DMAx_COUNT_HIGH     0x14
  79
  80#define USB_DMA_REG(ep, reg)    (USB_DMA_BASE + 0x20 * ep + reg)
  81
  82/* Almost 1 second */
  83#define TIMER_DELAY     (1 * HZ)
  84
  85static struct timer_list musb_conn_timer;
  86
  87#endif  /* __MUSB_BLACKFIN_H__ */
  88