Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* arch/arm/plat-samsung/include/plat/debug-macro.S
2 *
3 * Copyright 2005, 2007 Simtec Electronics
4 * http://armlinux.simtec.co.uk/
5 * Ben Dooks <ben@simtec.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10*/
11
12#include <linux/serial_s3c.h>
13
14/* The S5PV210/S5PC110 implementations are as belows. */
15
16 .macro fifo_level_s5pv210 rd, rx
17 ldr \rd, [\rx, # S3C2410_UFSTAT]
18ARM_BE8(rev \rd, \rd)
19 and \rd, \rd, #S5PV210_UFSTAT_TXMASK
20 .endm
21
22 .macro fifo_full_s5pv210 rd, rx
23 ldr \rd, [\rx, # S3C2410_UFSTAT]
24ARM_BE8(rev \rd, \rd)
25 tst \rd, #S5PV210_UFSTAT_TXFULL
26 .endm
27
28/* The S3C2440 implementations are used by default as they are the
29 * most widely re-used */
30
31 .macro fifo_level_s3c2440 rd, rx
32 ldr \rd, [\rx, # S3C2410_UFSTAT]
33ARM_BE8(rev \rd, \rd)
34 and \rd, \rd, #S3C2440_UFSTAT_TXMASK
35 .endm
36
37#ifndef fifo_level
38#define fifo_level fifo_level_s3c2440
39#endif
40
41 .macro fifo_full_s3c2440 rd, rx
42 ldr \rd, [\rx, # S3C2410_UFSTAT]
43ARM_BE8(rev \rd, \rd)
44 tst \rd, #S3C2440_UFSTAT_TXFULL
45 .endm
46
47#ifndef fifo_full
48#define fifo_full fifo_full_s3c2440
49#endif
50
51 .macro senduart,rd,rx
52 strb \rd, [\rx, # S3C2410_UTXH]
53 .endm
54
55 .macro busyuart, rd, rx
56 ldr \rd, [\rx, # S3C2410_UFCON]
57ARM_BE8(rev \rd, \rd)
58 tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
59 beq 1001f @
60 @ FIFO enabled...
611003:
62 fifo_full \rd, \rx
63 bne 1003b
64 b 1002f
65
661001:
67 @ busy waiting for non fifo
68 ldr \rd, [\rx, # S3C2410_UTRSTAT]
69ARM_BE8(rev \rd, \rd)
70 tst \rd, #S3C2410_UTRSTAT_TXFE
71 beq 1001b
72
731002: @ exit busyuart
74 .endm
75
76 .macro waituart,rd,rx
77 ldr \rd, [\rx, # S3C2410_UFCON]
78ARM_BE8(rev \rd, \rd)
79 tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
80 beq 1001f @
81 @ FIFO enabled...
821003:
83 fifo_level \rd, \rx
84 teq \rd, #0
85 bne 1003b
86 b 1002f
871001:
88 @ idle waiting for non fifo
89 ldr \rd, [\rx, # S3C2410_UTRSTAT]
90ARM_BE8(rev \rd, \rd)
91 tst \rd, #S3C2410_UTRSTAT_TXFE
92 beq 1001b
93
941002: @ exit busyuart
95 .endm