| /* 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 |