blob: c84dae546dc60f0e4a5f775698406f73600c60c3 [file] [log] [blame]
Bryan Wu0c6a8812008-12-02 21:33:44 +02001/*
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
Sonic Zhangdaf58222009-11-16 19:13:08 +053017/* 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
Sonic Zhang07027942009-11-16 16:19:27 +053044/* 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) && \
Felipe Balbi62285962011-06-22 17:28:09 +030050 !defined(CONFIG_MUSB_PIO_ONLY)
Sonic Zhang07027942009-11-16 16:19:27 +053051# error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1"
52#endif
53
Bryan Wu0c6a8812008-12-02 21:33:44 +020054#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
Bryan Wu0c6a8812008-12-02 21:33:44 +020072
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)
Bryan Wu0c6a8812008-12-02 21:33:44 +020081
82/* Almost 1 second */
83#define TIMER_DELAY (1 * HZ)
84
85static struct timer_list musb_conn_timer;
86
87#endif /* __MUSB_BLACKFIN_H__ */