drivers/usb/musb/blackfin.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2007 by Analog Devices, Inc.
   4  */
   5
   6 #ifndef __MUSB_BLACKFIN_H__
   7 #define __MUSB_BLACKFIN_H__
   8
   9 /*
  10  * Blackfin specific definitions
  11  */
  12
  13 /* Anomalies notes:
  14  *
  15  *  05000450 - USB DMA Mode 1 Short Packet Data Corruption:
  16  *             MUSB driver is designed to transfer buffer of N * maxpacket size
  17  *             in DMA mode 1 and leave the rest of the data to the next
  18  *             transfer in DMA mode 0, so we never transmit a short packet in
  19  *             DMA mode 1.
  20  *
  21  *  05000463 - This anomaly doesn't affect this driver since it
  22  *             never uses L1 or L2 memory as data destination.
  23  *
  24  *  05000464 - This anomaly doesn't affect this driver since it
  25  *             never uses L1 or L2 memory as data source.
  26  *
  27  *  05000465 - The anomaly can be seen when SCLK is over 100 MHz, and there is
  28  *             no way to workaround for bulk endpoints.  Since the wMaxPackSize
  29  *             of bulk is less than or equal to 512, while the fifo size of
  30  *             endpoint 5, 6, 7 is 1024, the double buffer mode is enabled
  31  *             automatically when these endpoints are used for bulk OUT.
  32  *
  33  *  05000466 - This anomaly doesn't affect this driver since it never mixes
  34  *             concurrent DMA and core accesses to the TX endpoint FIFOs.
  35  *
  36  *  05000467 - The workaround for this anomaly will introduce another
  37  *             anomaly - 05000465.
  38  */
  39
  40 /* The Mentor USB DMA engine on BF52x (silicon v0.0 and v0.1) seems to be
  41  * unstable in host mode.  This may be caused by Anomaly 05000380.  After
  42  * digging out the root cause, we will change this number accordingly.
  43  * So, need to either use silicon v0.2+ or disable DMA mode in MUSB.
  44  */
  45 #if ANOMALY_05000380 && defined(CONFIG_BF52x) && \
  46         !defined(CONFIG_MUSB_PIO_ONLY)
  47 # error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1"
  48 #endif
  49
  50 #undef DUMP_FIFO_DATA
  51 #ifdef DUMP_FIFO_DATA
  52 static void dump_fifo_data(u8 *buf, u16 len)
  53 {
  54         u8 *tmp = buf;
  55         int i;
  56
  57         for (i = 0; i < len; i++) {
  58                 if (!(i % 16) && i)
  59                         pr_debug("\n");
  60                 pr_debug("%02x ", *tmp++);
  61         }
  62         pr_debug("\n");
  63 }
  64 #else
  65 #define dump_fifo_data(buf, len)        do {} while (0)
  66 #endif
  67
  68
  69 #define USB_DMA_BASE            USB_DMA_INTERRUPT
  70 #define USB_DMAx_CTRL           0x04
  71 #define USB_DMAx_ADDR_LOW       0x08
  72 #define USB_DMAx_ADDR_HIGH      0x0C
  73 #define USB_DMAx_COUNT_LOW      0x10
  74 #define USB_DMAx_COUNT_HIGH     0x14
  75
  76 #define USB_DMA_REG(ep, reg)    (USB_DMA_BASE + 0x20 * ep + reg)
  77
  78 /* Almost 1 second */
  79 #define TIMER_DELAY     (1 * HZ)
  80
  81 #endif  /* __MUSB_BLACKFIN_H__ */