projects / mirror_ubuntu-artful-kernel.git / blame
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1 | /* linux/include/asm-arm/plat-s3c/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 <asm/plat-s3c/regs-serial.h> | |
| 13 | ||
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14 | /* The S3C2440 implementations are used by default as they are the |
| 15 | * most widely re-used */ | |
| 16 | ||
| 17 | .macro fifo_level_s3c2440 rd, rx | |
| 18 | ldr \rd, [ \rx, # S3C2410_UFSTAT ] | |
| 19 | and \rd, \rd, #S3C2440_UFSTAT_TXMASK | |
| 20 | .endm | |
| 21 | ||
| 22 | #ifndef fifo_level | |
| 23 | #define fifo_level fifo_level_s3c2410 | |
| 24 | #endif | |
| 25 | ||
| 26 | .macro fifo_full_s3c2440 rd, rx | |
| 27 | ldr \rd, [ \rx, # S3C2410_UFSTAT ] | |
| 28 | tst \rd, #S3C2440_UFSTAT_TXFULL | |
| 29 | .endm | |
| 30 | ||
| 31 | #ifndef fifo_full | |
| 32 | #define fifo_full fifo_full_s3c2440 | |
| 33 | #endif | |
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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 | fifo_full \rd, \rx | |
| 46 | bne 1003b | |
| 47 | b 1002f | |
| 48 | ||
| 49 | 1001: | |
| 50 | @ busy waiting for non fifo | |
| 51 | ldr \rd, [ \rx, # S3C2410_UTRSTAT ] | |
| 52 | tst \rd, #S3C2410_UTRSTAT_TXFE | |
| 53 | beq 1001b | |
| 54 | ||
| 55 | 1002: @ exit busyuart | |
| 56 | .endm | |
| 57 | ||
| 58 | .macro waituart,rd,rx | |
| 498e03b6 BD |
59 | ldr \rd, [ \rx, # S3C2410_UFCON ] |
| 60 | tst \rd, #S3C2410_UFCON_FIFOMODE @ fifo enabled? | |
| 61 | beq 1001f @ | |
| 62 | @ FIFO enabled... | |
| 63 | 1003: | |
| 64 | fifo_level \rd, \rx | |
| 65 | teq \rd, #0 | |
| 66 | bne 1003b | |
| 67 | b 1002f | |
| 68 | 1001: | |
| 69 | @ idle waiting for non fifo | |
| 70 | ldr \rd, [ \rx, # S3C2410_UTRSTAT ] | |
| 71 | tst \rd, #S3C2410_UTRSTAT_TXFE | |
| 72 | beq 1001b | |
| 73 | ||
| 74 | 1002: @ exit busyuart | |
| 75 | .endm |