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
|
/* linux/include/asm-arm/plat-s3c/debug-macro.S
*
* Copyright 2005, 2007 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* This program 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.
*/
#include <asm/plat-s3c/regs-serial.h>
/* The S3C2440 implementations are used by default as they are the
* most widely re-used */
.macro fifo_level_s3c2440 rd, rx
ldr \rd, [ \rx, # S3C2410_UFSTAT ]
and \rd, \rd, #S3C2440_UFSTAT_TXMASK
.endm
#ifndef fifo_level
#define fifo_level fifo_level_s3c2410
#endif
.macro fifo_full_s3c2440 rd, rx
ldr \rd, [ \rx, # S3C2410_UFSTAT ]
tst \rd, #S3C2440_UFSTAT_TXFULL
.endm
#ifndef fifo_full
#define fifo_full fifo_full_s3c2440
#endif
.macro senduart,rd,rx
strb \rd, [\rx, # S3C2410_UTXH ]
.endm
.macro busyuart, rd, rx
ldr \rd, [ \rx, # S3C2410_UFCON ]
tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
beq 1001f @
@ FIFO enabled...
1003:
fifo_full \rd, \rx
bne 1003b
b 1002f
1001:
@ busy waiting for non fifo
ldr \rd, [ \rx, # S3C2410_UTRSTAT ]
tst \rd, #S3C2410_UTRSTAT_TXFE
beq 1001b
1002: @ exit busyuart
.endm
.macro waituart,rd,rx
ldr \rd, [ \rx, # S3C2410_UFCON ]
tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
beq 1001f @
@ FIFO enabled...
1003:
fifo_level \rd, \rx
teq \rd, #0
bne 1003b
b 1002f
1001:
@ idle waiting for non fifo
ldr \rd, [ \rx, # S3C2410_UTRSTAT ]
tst \rd, #S3C2410_UTRSTAT_TXFE
beq 1001b
1002: @ exit busyuart
.endm
|
