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kernel/linux-imx6_3.14.28/drivers/usb/musb/blackfin.h 2.7 KB
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  /*
   * Copyright (C) 2007 by Analog Devices, Inc.
   *
   * The Inventra Controller Driver for Linux is free software; you
   * can redistribute it and/or modify it under the terms of the GNU
   * General Public License version 2 as published by the Free Software
   * Foundation.
   */
  
  #ifndef __MUSB_BLACKFIN_H__
  #define __MUSB_BLACKFIN_H__
  
  /*
   * Blackfin specific definitions
   */
  
  /* Anomalies notes:
   *
   *  05000450 - USB DMA Mode 1 Short Packet Data Corruption:
   *             MUSB driver is designed to transfer buffer of N * maxpacket size
   *             in DMA mode 1 and leave the rest of the data to the next
   *             transfer in DMA mode 0, so we never transmit a short packet in
   *             DMA mode 1.
   *
   *  05000463 - This anomaly doesn't affect this driver since it
   *             never uses L1 or L2 memory as data destination.
   *
   *  05000464 - This anomaly doesn't affect this driver since it
   *             never uses L1 or L2 memory as data source.
   *
   *  05000465 - The anomaly can be seen when SCLK is over 100 MHz, and there is
   *             no way to workaround for bulk endpoints.  Since the wMaxPackSize
   *             of bulk is less than or equal to 512, while the fifo size of
   *             endpoint 5, 6, 7 is 1024, the double buffer mode is enabled
   *             automatically when these endpoints are used for bulk OUT.
   *
   *  05000466 - This anomaly doesn't affect this driver since it never mixes
   *             concurrent DMA and core accesses to the TX endpoint FIFOs.
   *
   *  05000467 - The workaround for this anomaly will introduce another
   *             anomaly - 05000465.
   */
  
  /* The Mentor USB DMA engine on BF52x (silicon v0.0 and v0.1) seems to be
   * unstable in host mode.  This may be caused by Anomaly 05000380.  After
   * digging out the root cause, we will change this number accordingly.
   * So, need to either use silicon v0.2+ or disable DMA mode in MUSB.
   */
  #if ANOMALY_05000380 && defined(CONFIG_BF52x) && \
  	!defined(CONFIG_MUSB_PIO_ONLY)
  # error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1"
  #endif
  
  #undef DUMP_FIFO_DATA
  #ifdef DUMP_FIFO_DATA
  static void dump_fifo_data(u8 *buf, u16 len)
  {
  	u8 *tmp = buf;
  	int i;
  
  	for (i = 0; i < len; i++) {
  		if (!(i % 16) && i)
  			pr_debug("
  ");
  		pr_debug("%02x ", *tmp++);
  	}
  	pr_debug("
  ");
  }
  #else
  #define dump_fifo_data(buf, len)	do {} while (0)
  #endif
  
  
  #define USB_DMA_BASE		USB_DMA_INTERRUPT
  #define USB_DMAx_CTRL		0x04
  #define USB_DMAx_ADDR_LOW	0x08
  #define USB_DMAx_ADDR_HIGH	0x0C
  #define USB_DMAx_COUNT_LOW	0x10
  #define USB_DMAx_COUNT_HIGH	0x14
  
  #define USB_DMA_REG(ep, reg)	(USB_DMA_BASE + 0x20 * ep + reg)
  
  /* Almost 1 second */
  #define TIMER_DELAY	(1 * HZ)
  
  static struct timer_list musb_conn_timer;
  
  #endif	/* __MUSB_BLACKFIN_H__ */