blackfin.h
2.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
/*
* 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("\n");
pr_debug("%02x ", *tmp++);
}
pr_debug("\n");
}
#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__ */