Merge master.kernel.org:/home/rmk/linux-2.6-arm
[linux-2.6] / include / asm-arm / arch-s3c2410 / debug-macro.S
1 /* linux/include/asm-arm/arch-s3c2410/debug-macro.S
2  *
3  * Debugging macro include header
4  *
5  *  Copyright (C) 1994-1999 Russell King
6  *  Copyright (C) 2005 Simtec Electronics
7  *
8  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13  *
14  * Modifications:
15  *     10-Mar-2005 LCVR  Changed S3C2410_VA to S3C24XX_VA
16 */
17
18 #include <asm/arch/map.h>
19 #include <asm/arch/regs-serial.h>
20 #include <asm/arch/regs-gpio.h>
21
22 #define S3C2410_UART1_OFF (0x4000)
23 #define SHIFT_2440TXF (14-9)
24
25                 .macro addruart, rx
26                 mrc     p15, 0, \rx, c1, c0
27                 tst     \rx, #1
28                 ldreq   \rx, = S3C24XX_PA_UART
29                 ldrne   \rx, = S3C24XX_VA_UART
30 #if CONFIG_DEBUG_S3C2410_UART != 0
31                 add     \rx, \rx, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C2410_UART)
32 #endif
33                 .endm
34
35                 .macro  senduart,rd,rx
36                 strb    \rd, [\rx, # S3C2410_UTXH ]
37                 .endm
38
39                 .macro  busyuart, rd, rx
40                 ldr     \rd, [ \rx, # S3C2410_UFCON ]
41                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
42                 beq     1001f                           @
43                 @ FIFO enabled...
44 1003:
45                 @ check for arm920 vs arm926. currently assume all arm926
46                 @ devices have an 64 byte FIFO identical to the s3c2440
47                 mrc     p15, 0, \rd, c0, c0
48                 and     \rd, \rd, #0xff0
49                 teq     \rd, #0x260
50                 beq     1004f
51                 mrc     p15, 0, \rd, c1, c0
52                 tst     \rd, #1
53                 addeq   \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
54                 addne   \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
55                 bic     \rd, \rd, #0xff000
56                 ldr     \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
57                 and     \rd, \rd, #0x00ff0000
58                 teq     \rd, #0x00440000                @ is it 2440?
59 1004:
60                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
61                 moveq   \rd, \rd, lsr #SHIFT_2440TXF
62                 tst     \rd, #S3C2410_UFSTAT_TXFULL
63                 bne     1003b
64                 b       1002f
65
66 1001:
67                 @ busy waiting for non fifo
68                 ldr     \rd, [ \rx, # S3C2410_UTRSTAT ]
69                 tst     \rd, #S3C2410_UTRSTAT_TXFE
70                 beq     1001b
71
72 1002:           @ exit busyuart
73                 .endm
74
75                 .macro  waituart,rd,rx
76
77                 ldr     \rd, [ \rx, # S3C2410_UFCON ]
78                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
79                 beq     1001f                           @
80                 @ FIFO enabled...
81 1003:
82                 mrc     p15, 0, \rd, c1, c0
83                 tst     \rd, #1
84                 addeq   \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
85                 addne   \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
86                 bic     \rd, \rd, #0xff000
87                 ldr     \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
88                 and     \rd, \rd, #0x00ff0000
89                 teq     \rd, #0x00440000                @ is it 2440?
90
91                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
92                 andne   \rd, \rd, #S3C2410_UFSTAT_TXMASK
93                 andeq   \rd, \rd, #S3C2440_UFSTAT_TXMASK
94                 teq     \rd, #0
95                 bne     1003b
96                 b       1002f
97
98 1001:
99                 @ idle waiting for non fifo
100                 ldr     \rd, [ \rx, # S3C2410_UTRSTAT ]
101                 tst     \rd, #S3C2410_UTRSTAT_TXFE
102                 beq     1001b
103
104 1002:           @ exit busyuart
105                 .endm