projects/linux·blob master · refs

94 lines · 1.9 KiB

1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright 2005, 2007 Simtec Electronics
4 * http://armlinux.simtec.co.uk/
5 * Ben Dooks <ben@simtec.co.uk>
6 */
7
8#include <linux/serial_s3c.h>
9
10/* The S5PV210/S5PC110 implementations are as belows. */
11
12 .macro fifo_level_s5pv210 rd, rx
13 ldr \rd, [\rx, # S3C2410_UFSTAT]
14ARM_BE8(rev \rd, \rd)
15 and \rd, \rd, #S5PV210_UFSTAT_TXMASK
16 .endm
17
18 .macro fifo_full_s5pv210 rd, rx
19 ldr \rd, [\rx, # S3C2410_UFSTAT]
20ARM_BE8(rev \rd, \rd)
21 tst \rd, #S5PV210_UFSTAT_TXFULL
22 .endm
23
24/* The S3C2440 implementations are used by default as they are the
25 * most widely re-used */
26
27 .macro fifo_level_s3c2440 rd, rx
28 ldr \rd, [\rx, # S3C2410_UFSTAT]
29ARM_BE8(rev \rd, \rd)
30 and \rd, \rd, #S3C2440_UFSTAT_TXMASK
31 .endm
32
33#ifndef fifo_level
34#define fifo_level fifo_level_s3c2440
35#endif
36
37 .macro fifo_full_s3c2440 rd, rx
38 ldr \rd, [\rx, # S3C2410_UFSTAT]
39ARM_BE8(rev \rd, \rd)
40 tst \rd, #S3C2440_UFSTAT_TXFULL
41 .endm
42
43#ifndef fifo_full
44#define fifo_full fifo_full_s3c2440
45#endif
46
47 .macro senduart,rd,rx
48 strb \rd, [\rx, # S3C2410_UTXH]
49 .endm
50
51 .macro busyuart, rd, rx
52 ldr \rd, [\rx, # S3C2410_UFCON]
53ARM_BE8(rev \rd, \rd)
54 tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
55 beq 1001f @
56 @ FIFO enabled...
571003:
58 fifo_full \rd, \rx
59 bne 1003b
60 b 1002f
61
621001:
63 @ busy waiting for non fifo
64 ldr \rd, [\rx, # S3C2410_UTRSTAT]
65ARM_BE8(rev \rd, \rd)
66 tst \rd, #S3C2410_UTRSTAT_TXFE
67 beq 1001b
68
691002: @ exit busyuart
70 .endm
71
72 .macro waituartcts,rd,rx
73 .endm
74
75 .macro waituarttxrdy,rd,rx
76 ldr \rd, [\rx, # S3C2410_UFCON]
77ARM_BE8(rev \rd, \rd)
78 tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled?
79 beq 1001f @
80 @ FIFO enabled...
811003:
82 fifo_level \rd, \rx
83 teq \rd, #0
84 bne 1003b
85 b 1002f
861001:
87 @ idle waiting for non fifo
88 ldr \rd, [\rx, # S3C2410_UTRSTAT]
89ARM_BE8(rev \rd, \rd)
90 tst \rd, #S3C2410_UTRSTAT_TXFE
91 beq 1001b
92
931002: @ exit busyuart
94 .endm